JP2020061921A - Power conversion device - Google Patents

Abstract

To provide a power conversion device that can expand the range of utilization.SOLUTION: A power conversion device 1 is connected to three or more voltage portions 4. The power conversion device 1 includes switching circuit portions 21, 22, and 23 as three or more power conversion circuit portions, which are respectively connected to the three or more voltage portions 4, and a multi-port transformer 3 connected to the three or more power conversion circuit portions at different ports, respectively. At least one of the voltage portions 4 is a load LD.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power conversion device.

  As a power conversion device including a first battery, a second battery, and an AC power input / output terminal, Patent Document 1 discloses a transformer having three coils magnetically coupled to each other (hereinafter, also appropriately referred to as a multiport transformer). Is disclosed.

Japanese Patent No. 6140602

  However, in the power conversion device of Patent Document 1, connected devices are extremely limited. Therefore, there is room for expanding the range of utilization as a power conversion device using a multi-port transformer.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a power conversion device that can be widely used.

1st aspect of this invention is a power converter device (1) connected with three or more voltage parts (4), Comprising:
Three or more power conversion circuit units (21, 22, 23, 24, 25, 26, 27) respectively connected to the three or more voltage units, and
A multi-port transformer (3) connected to each of the three or more power conversion circuit units at different ports,
At least one of the voltage units is in a power converter, which is a load (LD).

A second aspect of the present invention is a power conversion device (1) connected to three or more voltage sections (4),
Three or more power conversion circuit units (21, 22, 23, 24, 25, 26, 27) respectively connected to the three or more voltage units, and
A multi-port transformer (3) connected to each of the three or more power conversion circuit units at different ports,
The three or more voltage units connected to each other include at least a vehicle drive battery (BH) and a plurality of power supply units for supplying power to the vehicle drive battery from outside the vehicle. It is in.

A third aspect of the present invention is a power conversion device (1) connected to four or more voltage units (4),
Four or more power conversion circuit parts (21, 22, 23, 24, 25, 26, 27) respectively connected to the four or more voltage parts, and
There is provided a power conversion device including the four or more power conversion circuit units, and a multi-port transformer (3) connected at different ports.

A fourth aspect of the present invention is one multi-port transformer (3a, 3b) and three or more power conversion circuit units (21a, 22a, respectively) connected to three or more ports in the multi-port transformer. 23a, 21b, 22b, 23b) and a plurality of power conversion units (1a, 1b),
A power conversion device (10) comprising: a connection wiring part (5) for electrically connecting in parallel at least one of the power conversion circuit parts in each of the power conversion units.
It is in.

  In the power conversion device according to the first aspect, at least one of the three voltage units connected is a load. As a result, power conversion between three or more voltage units including the load can be performed via one multi-port transformer.

  In the power conversion device according to the second aspect, the three or more voltage units connected to each other include at least a vehicle drive battery and a plurality of power supply units. As a result, power can be supplied from the plurality of power supply units to the vehicle drive battery via one multiport transformer.

  The power conversion device according to the third aspect is connected to four or more voltage units and has four or more power conversion circuit units. Thereby, electric power conversion can be mutually performed among four or more voltage parts via one multiport transformer. Therefore, power conversion between a plurality of voltage units can be performed through one multi-port transformer in an extremely large number of combinations.

The power conversion device according to the fourth aspect has a plurality of power conversion units and a connection wiring section. The connection wiring section electrically connects at least one power conversion circuit section in each power conversion unit in parallel. Therefore, it is also possible to transfer power between the power conversion circuit units between the plurality of power conversion units. As a result, even when a failure occurs in a part of the power conversion circuit section of a part of the power conversion unit, it becomes possible to substitute another power conversion circuit section with the function. As a result, the redundancy of the power conversion device can be improved.
As described above, in any of the power conversion devices of the first aspect, the second aspect, the third aspect, and the fourth aspect, the range of utilization thereof can be expanded.

As described above, according to the above aspect, it is possible to provide a power conversion device capable of expanding the range of utilization.
In the claims and the means for solving the problems, reference numerals in parentheses indicate the corresponding relationship with the specific means described in the embodiments described later, and limit the technical scope of the present invention. Not a thing.

The circuit block diagram of the power converter device in the reference form 1. 3 is a circuit configuration diagram showing an example of a multi-port transformer and three power conversion circuit units in Reference Embodiment 1. FIG. 3 is a circuit configuration diagram of the power conversion device according to the first embodiment. FIG. 6 is a circuit configuration diagram of a power conversion device according to a second embodiment. FIG. The circuit block diagram of the power converter device in the reference form 2. 6 is a circuit configuration diagram of a power conversion device according to a third embodiment. FIG. 6 is a circuit configuration diagram of a power conversion device according to a fourth embodiment. FIG. The circuit block diagram of the power converter device in the reference form 3. 6 is a circuit configuration diagram of a power conversion device according to a fifth embodiment. FIG. The circuit block diagram of the power converter device in the reference form 4. The circuit block diagram of the power converter device in the reference form 5. The circuit block diagram of the power converter device in the reference form 6. 7 is a circuit configuration diagram of a power conversion device according to a sixth embodiment. FIG. 7 is a circuit configuration diagram of a power conversion device according to a seventh embodiment. FIG. The circuit block diagram of the power converter device in the reference form 7. 9 is a circuit configuration diagram of a power conversion device according to an eighth embodiment. FIG. 11 is a circuit configuration diagram of a power conversion device according to a ninth embodiment. FIG. 11 is a circuit configuration diagram of a power conversion device according to a tenth embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 11. FIG. 13 is a circuit configuration diagram of a power conversion device according to a twelfth embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 13. The circuit block diagram of the power converter device in Embodiment 14. FIG. The circuit block diagram of the power converter device in Embodiment 15. FIG. The circuit block diagram of the power converter device in Embodiment 16. FIG. The circuit block diagram of the power converter device in Embodiment 17. FIG. The circuit block diagram of the power converter device in Embodiment 18. FIG. The circuit block diagram of the power converter device in Embodiment 19. FIG. 21 is a circuit configuration diagram of a power converter in Embodiment 20. FIG. 23 is a circuit configuration diagram of a power conversion device according to a twenty-first embodiment. FIG. 23 is a circuit configuration diagram of a power conversion device according to a twenty-second embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 23. The circuit block diagram of the power converter device in Embodiment 24. 25 is a circuit configuration diagram of a power conversion device according to a twenty-fifth embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 26. 27 is a circuit configuration diagram of a power conversion device according to a twenty-seventh embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 28. FIG. The circuit block diagram of the power converter device in Embodiment 29. FIG. FIG. 31 is a circuit configuration diagram of a power conversion device according to a thirtieth embodiment. 33 is a circuit configuration diagram of the power converter in Embodiment 31. FIG. 33 is a circuit configuration diagram of a power conversion device according to a thirty-second embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 33. FIG. 34 is a circuit configuration diagram of a power conversion device according to a thirty-fourth embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 35. FIG. 37 is a circuit configuration diagram of a power conversion device according to a thirty-sixth embodiment. FIG. The circuit block diagram of the power converter device in Embodiment 37. The circuit block diagram of the power converter device in Embodiment 38. FIG. The circuit block diagram of the power converter device in Embodiment 39. FIG. The circuit block diagram of the power converter device in Embodiment 40. FIG. The circuit block diagram of the power converter device in Embodiment 41. FIG. The circuit block diagram of the power converter device in Embodiment 42. The circuit block diagram of the power converter device in Embodiment 43. The circuit block diagram of the power converter device in Embodiment 44. FIG. The circuit block diagram of the power converter device in Embodiment 45. FIG. The circuit block diagram of the power converter device in Embodiment 46. FIG. The circuit block diagram of the power converter device in Embodiment 47. The circuit block diagram of the power converter device in Embodiment 48. FIG. The circuit block diagram of the power converter device in Embodiment 49. FIG. The circuit block diagram of the power converter device in Embodiment 50. FIG. The circuit block diagram of the power converter device in Embodiment 51. FIG. 51 is a circuit configuration diagram of a power converter in which a voltage unit is connected according to the fifty-first embodiment. FIG. The circuit block diagram of the power converter device in the comparative form 1. The circuit block diagram of the power converter device in the reference form 28. The circuit block diagram of the power converter device in Embodiment 52. FIG. 53 is a circuit configuration diagram of a power conversion device to which a voltage unit is connected according to the 52nd embodiment. The circuit block diagram of the power converter device in the reference form 29.

  In the power converter of the second aspect, the plurality of power supply units may include at least two of an AC power supply, a DC power supply, and a solar power supply. In this case, the vehicle drive battery can be charged from different power sources.

Various power supplies, loads, and the like can be applied to the voltage unit. Further, at least a part of the plurality of voltage units can be used as a power source or a load mounted on the vehicle, for example.

  Hereinafter, an embodiment and a reference embodiment of a power converter will be described with reference to the drawings.

(Reference form 1)
The present mode is a mode of a power conversion device 100 connected to three voltage units 4 as shown in FIG. 1.
The power conversion device has three power conversion circuit units 21, 22, and 23, and a multiport transformer 3. The three power conversion circuit units 21, 22, and 23 are connected to the three voltage units 4, respectively. The multiport transformer 3 is connected to the three power conversion circuit units 21, 22, and 23 at different ports.
In the present embodiment, the three voltage units 4 are the AC power supply ACS, the power storage device BL, and the vehicle drive battery BH.

[Power storage device BL]
Power storage device BL can be an auxiliary battery installed in a vehicle. The voltage of power storage device BL can be set to, for example, 12V. However, the voltage of the power storage device BL is not limited to this, and may be, for example, 7V, 48V, or the like. The power storage device BL can also be configured with a capacitor or the like.

  In addition, a plurality of power storage devices (BL1, BL2) can be connected to the power conversion device. In this case, for example, the plurality of power storage devices may have the same voltage or different voltages. For example, the voltage of one power storage device BL1 may be 12V and the voltage of the other power storage device BL2 may be other than 12V or 12V.

[Vehicle drive battery BH (high voltage battery BH)]
The vehicle drive battery BH is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and can store and output electric power for driving the vehicle. The vehicle drive battery BH is a battery having a voltage higher than that of the power storage device BL, and can be set to 200 V or higher, for example. Hereinafter, the vehicle driving battery BH is also referred to as a high voltage battery BH.

[AC power supply ACS]
The AC power supply ACS is a kind of power supply unit for supplying power to the high voltage battery BH from outside the vehicle. That is, as the AC power supply ACS, for example, an AC charger such as a power feeding station is assumed. Although not shown, the AC power supply ACS may have AC output ports connected in parallel. The AC power supply ACS and the AC output port are configured to be able to input and output AC power having an effective voltage of 100 V, for example. Further, the AC output port can be provided with a relay capable of switching between energization and interruption. In the following embodiments and reference embodiments, the AC power supply ACS means a configuration including an AC output port unless otherwise specified.

  The power conversion device 1 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle. The high-voltage battery BH and the power storage device BL are also mounted on the vehicle together with the power conversion device 1.

  The multiport transformer 3 has three or more coils magnetically coupled to each other. Then, three voltage units 4 are connected to both terminals of these coils, respectively.

  The power conversion circuit units 21, 22, and 23 may each include a plurality of power conversion elements. As the power conversion element, for example, a switching element such as a MOSFET (abbreviation of MOS field effect transistor), an IGBT (abbreviation of insulated gate bipolar transistor), or a diode having a switching function can be used. It is not limited to. In the following, the power conversion circuit units 21, 22, 23, etc. are also appropriately referred to as switching circuit units 21, 22, 23, etc.

  As shown in FIG. 2, each of the switching circuit units 21, 22, and 23 has a bridge circuit configuration. That is, in the power conversion device 100 of the present embodiment, the multiport transformer 3 and the three switching circuit units 21, 22, and 23 form a MAB (abbreviation of Multiple Active Bridge).

  For example, as shown in FIG. 2, the switching circuit units 21, 22, and 23 can have a full-bridge circuit configuration. Further, these switching circuit units 21, 22, and 23 may have a half-bridge circuit configuration. Alternatively, some of the three switching circuit units 21, 22, and 23 may have a full-bridge circuit configuration, and the other may have a half-bridge circuit configuration.

In the present embodiment, power conversion can be performed among the AC power supply ACS, the power storage device BL, and the high voltage battery BH. For example, it is possible to supply power from the high voltage battery BH to the AC output port of the AC power supply ACS while charging the power storage device BL from the high voltage battery BH. Further, power storage device BL can be charged while charging high voltage battery BH from AC power supply ACS.
The power conversion between the three voltage units 4 as described above can be realized by the single compact multi-port transformer 3 and the small-scale switching circuit units 21, 22, 23. Here, "small-scale" includes that the number of parts is small and that the overall size is small.

The three voltage units 4 in the reference mode 1 described above can be appropriately changed to other types of voltage units, that is, various power sources, loads, etc., to appropriately construct the embodiment or the reference mode.
In addition to the vehicle drive battery BH, the AC power supply ACS, and the power storage device BL shown in Reference Embodiment 1, the voltage unit connected to the power conversion device may be, for example, a DC power supply DCS, a load LD, and a sun shown below. An optical power source SS or the like is considered. That is, as shown in the embodiments and the like to be described later, by appropriately combining three or more various voltage units via a power converter, power conversion between a plurality of voltage units is performed via one multi-port transformer. Can be realized.

[Solar power supply SS]
The solar power supply SS is a kind of power supply unit for supplying electric power to the high voltage battery BH from outside the vehicle. For example, a solar power generator including a solar panel arranged on the ceiling of a vehicle or the like can be used. The solar power source SS can be a solar power generation device having an MPPT (maximum power point tracking function). Further, the solar power supply SS can be a solar power generation device having a PWM (pulse width modulation) control function.

  In addition, since the solar power source SS has limited usable conditions such as time zone and weather, such a power source is often used together with other power sources. Therefore, by making it possible to connect the solar power source SS to a plurality of other voltage units via one multi-port transformer, it is possible to reduce the number of parts and the physical size of the entire system such as a vehicle power source system. it can.

[Load LD]
The load LD can be mounted on a vehicle, for example. The load LD can be, for example, a heater. As the heater, there is a heater for heating an electrically heated catalyst provided in an exhaust system of a hybrid vehicle or the like. Further, as the heater, there are a heater for heating a seat and the like, a heater for heating a battery such as a high voltage battery BH, and the like. Alternatively, as the heater, a heater that heats the cooling water of the high-voltage battery, which is called a water heater, may be adopted. In addition to the heater, for example, an active body control (for example, an air suspension), an electric supercharger, an engine cooling fan, an air conditioner compressor, or the like can be used. Further, the voltage of the load LD can be higher than the voltage of the power storage device BL. Further, the voltage of the load LD may be higher than the voltage of the high voltage battery BH.

[DC power supply DCS]
The DC power supply DCS is a kind of power supply unit for supplying power to the high voltage battery BH from outside the vehicle. The DC power supply DCS can be a charging power supply that can be charged with DC power. As the DC power supply DCS, for example, a DC charger such as a power feeding station is assumed.

(Embodiment 1)
As shown in FIG. 3, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of a solar power source SS, a load LD, and a high voltage battery BH.

  In this embodiment, power conversion between three or more voltage units 4 including the load LD can be performed via one multiport transformer 3. For example, electric power can be supplied from the solar power source SS to both the load LD and the high voltage battery BH via the multi-port transformer 3. Further, power can be supplied from the high voltage battery BH to the solar power source SS side.

In addition, it has the same configuration and effects as those of the first embodiment.
Note that, of the reference numerals used in the embodiments and the embodiments after the first embodiment, the same reference numerals as those used in the already-explained embodiments are the same as those in the already-explained embodiments or the reference embodiments unless otherwise specified. Represents components.

(Embodiment 2)
As shown in FIG. 4, the power conversion device 1 of this embodiment is connected to three voltage units 4 of a power storage device BL, a load LD, and a high-voltage battery BH.
The power storage device BL is not limited to the voltage of 12 V as described above, but may be of another voltage.

In the present embodiment, power can be supplied to the load LD from both the power storage device BL and the high voltage battery BH. In addition, electric power can be exchanged between power storage device BL and high-voltage battery BH. Then, after performing power arbitration between them, power can be supplied to the load LD from either the power storage device BL or the high voltage battery BH. Therefore, it is easy to improve energy efficiency in the entire system via the power conversion device 1.
In addition, it has the same configuration and effects as those of the first embodiment.

(Reference form 2)
As shown in FIG. 5, the power conversion device 100 of the present embodiment is connected to three voltage units 4 of a solar power source SS, a power storage device BL, and a high voltage battery BH.
In the present embodiment, for example, electric power can be supplied from the solar power source SS to both the power storage device BL and the high voltage battery BH via the multiport transformer 3. Further, power can be supplied from the high voltage battery BH to the solar power source SS side.

In addition, electric power can be exchanged between power storage device BL and high-voltage battery BH. Then, after performing power arbitration between the two, power can be supplied from the solar power source SS to either the power storage device BL or the high voltage battery BH. Therefore, it is easy to improve energy efficiency in the entire system via the power conversion device 1.
In addition, it has the same configuration and effects as those of the first embodiment.

(Embodiment 3)
As shown in FIG. 6, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of a DC power supply DCS, a load LD, and a high voltage battery BH.
In the present embodiment, for example, electric power can be supplied from the DC power supply DCS to both the load LD and the high-voltage battery BH via the multiport transformer 3. That is, it is possible to supply power from the DC power supply DCS to the load LD while the DC power supply DCS charges the high voltage battery BH. Thereby, for example, when the load LD is a heater, the heater can be heated early. In particular, before starting the vehicle, it is possible to heat the heater while the high voltage battery BH is being charged to raise the temperature of the catalyst and the like.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Embodiment 4)
As shown in FIG. 7, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of a solar power source SS, a DC power source DCS, and a high voltage battery BH.
That is, in the power conversion device 1 of the present embodiment, the three voltage units 4 connected to each other supply power to at least the vehicle driving battery (that is, the high voltage battery BH) and the vehicle driving battery from outside the vehicle. It includes a plurality of power supply units (that is, a DC power supply DCS and a solar power supply SS).

As a result, power can be supplied from the plurality of power supply units to the vehicle drive battery via the single multi-port transformer 3.
In the present embodiment, electric power can be supplied to the high voltage battery BH from the solar power source SS while the DC power source DCS is charging the high voltage battery BH. Thereby, the charging time of the high voltage battery BH can be shortened.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Reference form 3)
As shown in FIG. 8, the power conversion device 100 of the present embodiment is connected to three voltage units 4 of a power storage device BL, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, it is possible to charge the power storage device BL to the high voltage battery BH while the DC power supply DCS is charging the high voltage battery BH. Further, electric power can be supplied from DC power supply DCS to both power storage device BL and high-voltage battery BH via one multi-port transformer 3.
In addition, it has the same configuration and effects as those of the first embodiment.

(Embodiment 5)
As shown in FIG. 9, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of a power storage device BL, a load LD, and a high voltage battery BH.
In the present embodiment, power storage device BL can be a 12V power storage device.

In the present embodiment, power can be supplied to the load LD from both the power storage device BL and the high voltage battery BH via one multiport transformer 3. Therefore, for example, when the load LD is a heater, the heating time of the heater can be shortened. Further, the electric power from the power storage device BL may be used as the electric power for controlling the heater heating.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Reference form 4)
As shown in FIG. 10, the power conversion device 100 of this embodiment is connected to three voltage units 4 of a power storage device BL, a solar power source SS, and a high-voltage battery BH.
In the present embodiment, both the high voltage battery BH and the power storage device BL can be simultaneously charged from the solar power source SS via one multiport transformer 3. Thereby, the utilization rate of solar energy can be improved. In addition, for example, deterioration of power storage device BL used as an auxiliary battery can be suppressed. Further, the electric power from the power storage device BL may be used as the electric power for controlling the heater heating.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Reference form 5)
As shown in FIG. 11, the power conversion device 100 of the present embodiment is connected to three voltage units 4 of two power storage devices BL1 and BL2 and a high voltage battery BH.
In the present embodiment, the voltage of power storage device BL1 can be 12V. The voltage of power storage device BL2 may be 12V, which is the same as that of power storage device BL1, or a voltage different from this, for example, 7V, 48V, or the like.

In the present embodiment, power can be exchanged between power storage device BL1, power storage device BL2, and high-voltage battery BH via one multiport transformer 3. Then, power arbitration can be performed among these power storage device BL1, power storage device BL2, and high voltage battery BH. For example, the electric power of power storage devices BL1 and BL2 can be supplied to high-voltage battery BH and used as electric power for driving the vehicle. As a result, it is possible to improve the electricity cost.
In addition, it has the same configuration and effects as those of the first embodiment.

(Reference form 6)
As shown in FIG. 12, the power conversion device 100 of the present embodiment is connected to three voltage units 4 of a power storage device BL, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, power can be supplied from the power storage device BL to the high voltage battery BH while the high voltage battery BH is being charged from the DC power supply DCS. Thereby, the charging time can be shortened.
Further, power can be supplied from the DC power supply DCS to both the high voltage battery BH and the power storage device BL.
In addition, it has the same configuration and effects as those of the first embodiment.

(Embodiment 6)
As shown in FIG. 13, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of an AC power supply ACS, a load LD, and a high voltage battery BH.
In the present embodiment, it is possible to supply power from the AC power supply ACS to the high-voltage battery BH and also to the load LD. That is, the load LD such as the heater can be operated by the electric power of the AC power supply ACS while the high voltage battery BH is being charged by the AC power supply ACS. Further, it becomes possible to simultaneously supply power from the high voltage battery BH to the load LD and the AC output port of the AC power supply ACS.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Embodiment 7)
As shown in FIG. 14, the power conversion device 1 of this embodiment is connected to three voltage units 4 of an AC power supply ACS, a solar power supply SS, and a high-voltage battery BH.
In the present embodiment, it is possible to charge the high voltage battery BH from the solar power source SS while the AC power source ACS is charging the high voltage battery BH. Thereby, the charging time of the high voltage battery BH can be shortened.
Besides, it has the same configuration and effects as those of the fourth embodiment.

(Reference form 7)
As shown in FIG. 15, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of an AC power supply ACS, a power storage device BL, and a high voltage battery BH.
In particular, in this embodiment, as the power storage device BL, a power storage device other than the 12V system can be adopted.

  In the present embodiment, the high voltage battery BH can be charged from the power storage device BL while the high voltage battery BH is being charged from the AC power supply ACS. Thereby, the charging time can be shortened.

(Embodiment 8)
As shown in FIG. 16, the power conversion device 1 of the present embodiment is connected to three voltage units 4 of an AC power supply ACS, a DC power supply DCS, and a high voltage battery BH.
In this embodiment, the high voltage battery BH can be charged from both the AC power supply ACS and the DC power supply DCS. Thereby, the charging time of the high voltage battery BH can be shortened.
Besides, it has the same configuration and effects as those of the fourth embodiment.

(Embodiment 9)
The power conversion device 1 of the present embodiment is a power conversion device connected to four voltage units 4 as shown in FIG. 17.
The power conversion device 1 includes four power conversion circuit units (that is, switching circuit units 21, 22, 23, 24) and four switching circuit units 21, 22, 23, which are respectively connected to the four voltage units 4. , 24, and a multiport transformer 3 connected at different ports. In this embodiment, the multiport transformer 3 has four coils magnetically coupled to each other.

  In the present embodiment, as the four voltage units 4, the AC power supply ACS, the load LD, the power storage device BL, and the high voltage battery BH are connected to the power conversion device 1.

  The power conversion device 1 of the present embodiment is connected to the four voltage units 4 and has four power conversion circuit units (that is, switching circuit units 21, 22, 23, 24). As a result, it is possible to perform power conversion between the four voltage units 4 via the single multi-port transformer 3. Therefore, power conversion between the plurality of voltage units 4 can be performed via one multi-port transformer 3 in an extremely large number of combinations.

  That is, when four voltage units 4 are present, six combinations are possible as a combination of two voltage units. Therefore, the power conversion between the voltage units 4 can be performed through the one multi-port transformer 3 in six combinations. Therefore, it is possible to remarkably exchange power between the voltage units 4 in a large number of combinations while suppressing an increase in the number of parts and the physique.

Since the AC power supply ACS, the load LD, the power storage device BL, and the high-voltage battery BH are connected to the power conversion device 1 of the present embodiment, for example, the AC power supply ACS charges the high-voltage battery BH and the power storage device BL is charged. Can be charged, and further, power can be supplied to the load LD.
Besides, it has the same configuration and operation effects as those of the first embodiment.

(Embodiment 10)
As shown in FIG. 18, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of a solar power source SS, a power storage device BL, a load LD, and a high voltage battery BH.
In the present embodiment, it is possible to charge the high-voltage battery BH from the solar power source SS and supply power to the load LD and the power storage device BL. Further, the electric power of the solar power source SS, the power storage device BL, and the high voltage battery BH can be supplied to the load LD. Thereby, for example, when the load LD is a heater, the heating time of the heater can be shortened.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 11)
As shown in FIG. 19, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of a solar power source SS, a DC power source DCS, a load LD, and a high voltage battery BH.
In the present embodiment, it is possible to supply power from the solar power source SS to the load LD while the DC power source DCS is charging the high voltage battery BH. For example, when the load LD is a heater that heats the high voltage battery BH, the high voltage battery BH can be charged while the high voltage battery BH is heated by the heater of the load LD by the electric power of the solar power source SS. Thereby, the charging speed can be improved and the charging time can be shortened.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 12)
As shown in FIG. 20, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including a power storage device BL, a DC power supply DCS, a load LD, and a high voltage battery BH.
In the present embodiment, power can be supplied from power storage device BL to load LD during charging of high-voltage battery BH from DC power supply DCS. For example, when the load LD is a heater that heats the high voltage battery BH, the high voltage battery BH can be charged while the high voltage battery BH is heated by the heater of the load LD by the electric power of the power storage device BL. Thereby, the charging speed can be improved and the charging time can be shortened.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 13)
As shown in FIG. 21, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including a power storage device BL, a DC power supply DCS, a solar power supply SS, and a high-voltage battery BH.
In the present embodiment, power can be supplied from the power storage device BL and the solar power source SS to the high voltage battery BH during charging from the DC power source DCS to the high voltage battery BH. As a result, the high voltage battery BH can be charged in a short time.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 14)
As shown in FIG. 22, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including a power storage device BL, a load LD, a solar power source SS, and a high voltage battery BH.
In the present embodiment, a 12V type power storage device BL can be used.
In the present embodiment, it is possible to charge the power storage device BL and the load LD from the solar power source SS while charging the solar power source SS to the high-voltage battery BH.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 15)
As shown in FIG. 23, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including two power storage devices BL1 and BL2, a load LD, and a high voltage battery BH.
In the present embodiment, a 12V type power storage device BL1 can be used. In addition, as the other power storage device BL, a 12V system or another voltage may be used.

In this embodiment, electric power can be supplied to the load LD from the two power storage devices BL1 and BL2 and the high voltage battery BH. Thereby, for example, when the load LD is a heater, the heater heating time can be shortened.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 16)
As shown in FIG. 24, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of two power storage devices BL1 and BL2, a solar power source SS, and a high-voltage battery BH.
In the present embodiment, it is possible to charge the two power storage devices BL1 and BL2 and the high voltage battery BH from the solar power source SS. That is, it is possible to supply power from the solar power source SS to all of the two power storage devices BL1 and BL2 and the high-voltage battery BH at the same time, or to selectively charge one or two of them. it can. It is also possible to charge the high voltage battery BH from at least one of the two power storage devices BL1 and BL2 and the solar power source SS. That is, power supply redundancy can be achieved.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 17)
As shown in FIG. 25, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including a power storage device BL, a load LD, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, power can be supplied from power storage device BL to load LD during charging of high-voltage battery BH from DC power supply DCS. Then, it is possible to obtain the same effect as that of the eleventh embodiment.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 18)
As shown in FIG. 26, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including a power storage device BL, a solar power source SS, a DC power source DCS, and a high voltage battery BH.
In the present embodiment, power can be supplied from the solar power source SS to the high voltage battery BH while the DC power source DCS is charging the high voltage battery BH. As a result, the high voltage battery BH can be charged in a short time. Furthermore, charging of the high voltage battery BH from the power storage device BL can be performed at the same time. As a result, the high voltage battery BH can be charged at a higher speed.
Further, the power storage device BL can be charged from the high-voltage battery BH, the DC power supply DCS, and the solar power supply SS.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 19)
As shown in FIG. 27, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of two power storage devices BL1 and BL2, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, power can be supplied from at least one of the two power storage devices BL1 and BL2 to the high voltage battery BH during charging of the high voltage battery BH from the DC power supply DCS. As a result, the high voltage battery BH can be charged in a short time. Further, instead of charging the high voltage battery BH from the DC power supply DCS, the high voltage battery BH can be charged from at least one of the two power storage devices BL1 and BL2. That is, power supply redundancy can be achieved.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 20)
As shown in FIG. 28, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including an AC power supply ACS, a load LD, a solar power supply SS, and a high-voltage battery BH.
In the present embodiment, it is possible to supply electric power from the solar power source SS to the load LD while the AC power source ACS is charging the high voltage battery BH. This makes it possible to obtain the same effects as the eleventh embodiment.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 21)
As shown in FIG. 29, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of an AC power supply ACS, a load LD, a power storage device BL, and a high voltage battery BH.
In the present embodiment, electric power can be supplied from power storage device BL to load LD while AC power supply ACS is charging high-voltage battery BH. This makes it possible to obtain the same effects as the eleventh embodiment.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 22)
As shown in FIG. 30, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including an AC power supply ACS, a solar power supply SS, a power storage device BL, and a high-voltage battery BH.
In the present embodiment, it is possible to charge at least one of the high voltage battery BH and the power storage device BL from the solar power source SS while the AC power supply ACS is charging the high voltage battery BH. Further, the power storage device BL can be charged from at least one of the AC power supply ACS, the solar power supply SS, and the high-voltage battery BH.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 23)
As shown in FIG. 31, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of an AC power supply ACS, a load LD, a DC power supply DCS, and a high voltage battery BH.
In this embodiment, both the AC power supply ACS and the DC power supply DCS can charge the high-voltage battery BH and supply power to the load LD.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 24)
As shown in FIG. 32, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of an AC power supply ACS, a solar power supply SS, a DC power supply DCS, and a high voltage battery BH.
In this embodiment, the high voltage battery BH can be charged from the AC power supply ACS, the DC power supply DCS, and the solar power supply SS.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 25)
As shown in FIG. 33, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of an AC power supply ACS, a power storage device BL, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, power storage device BL can be a power storage device other than the 12V system.
In this embodiment, the high voltage battery BH and the power storage device BL can be charged from both the AC power supply ACS and the DC power supply DCS. Further, the high voltage battery BH can be charged from the AC power supply ACS, the DC power supply DCS, and the power storage device BL.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 26)
As shown in FIG. 34, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including an AC power supply ACS, a solar power supply SS, a power storage device BL, and a high voltage battery BH.
In the present embodiment, it is possible to charge the high voltage battery BH from the solar power source SS while the AC power source ACS is charging the high voltage battery BH. Further, the power storage device BL can be charged from at least one of the AC power supply ACS, the solar power supply SS, and the high-voltage battery BH.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 27)
As shown in FIG. 35, the power conversion device 1 of the present embodiment is connected to four voltage units 4 of an AC power supply ACS, two power storage devices BL1 and BL2, and a high voltage battery BH.
In the present embodiment, power can be supplied from at least one of the two power storage devices BL1 and BL2 to the high voltage battery BH during charging of the high voltage battery BH from the AC power supply ACS. As a result, the high voltage battery BH can be charged in a short time. Further, instead of charging the high voltage battery BH from the AC power supply ACS, the high voltage battery BH can be charged from at least one of the two power storage devices BL1 and BL2. That is, power supply redundancy can be achieved. In addition to charging the high voltage battery BH from the AC power supply ACS, at least one of the power storage devices BL1 and BL2 can be charged.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 28)
As shown in FIG. 36, the power conversion device 1 of the present embodiment is connected to four voltage units 4 including an AC power supply ACS, a power storage device BL, a DC power supply DCS, and a high voltage battery BH.
In the present embodiment, power storage device BL can be a 12V power storage device.
In this embodiment, the high voltage battery BH and the power storage device BL can be charged from both the AC power supply ACS and the DC power supply DCS. Further, the high voltage battery BH can be charged from the AC power supply ACS, the DC power supply DCS, and the power storage device BL.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 29)
The power conversion device 1 of the present embodiment is a power conversion device connected to five voltage units 4 as shown in FIG. 37.
The power conversion device 1 includes five power conversion circuit units (that is, switching circuit units 21, 22, 23, 24, 25) and five switching circuit units 21, 22 that are respectively connected to the five voltage units 4. , 23, 24, and 25, and a multi-port transformer 3 connected at different ports. In the present embodiment, the multiport transformer 3 has five coils that are magnetically coupled to each other.

  In the present embodiment, a DC power supply DCS, an AC power supply ACS, a load LD, two power storage devices BL1 and BL2, and a high voltage battery BH are connected to the power conversion device 1 as the five voltage units 4.

  The power conversion device 1 of the present embodiment can perform power conversion between the five voltage units 4 via the single multiport transformer 3. Therefore, power conversion between the plurality of voltage units 4 can be performed via one multi-port transformer 3 in an extremely large number of combinations.

  That is, when five voltage units 4 are present, ten combinations are possible as a combination of two pieces. Therefore, the power conversion between the voltage units 4 can be performed through the one multiport transformer 3 in ten combinations. Therefore, it is possible to remarkably exchange power between the voltage units 4 in a large number of combinations while suppressing an increase in the number of parts and the physique.

The power converter 1 of this embodiment can charge the high-voltage battery BH from the AC power supply ACS, the DC power supply DCS, and the two power storage devices BL1 and BL2. Further, for example, one power storage device BL1 (for example, 12V system) can be used as the electric power for charge control.
Other than that, it has the same configuration and operational effects as the ninth embodiment.

(Embodiment 30)
As shown in FIG. 38, the power conversion device 1 of the present embodiment is connected to five voltage units 4 including a DC power supply DCS, a solar power supply SS, a power storage device BL, a load LD, and a high-voltage battery BH.
In the present embodiment, electric power can be supplied from the solar power source SS and the power storage device BL to the load LD while charging the high voltage battery BH from the DC power source DCS. Thereby, for example, when the load LD is a heater, the heater heating can be accelerated. In addition, charging of the high voltage battery BH from the DC power supply DCS can be assisted by the power of the solar power supply SS and the power storage device BL.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 31)
As shown in FIG. 39, the power conversion device 1 of the present embodiment is connected to two power storage devices BL1 and BL2, a solar power source SS, a load LD, and a five voltage unit 4 of a high-voltage battery BH.
In this embodiment, the two power storage devices BL1 and BL2 and the high voltage battery BH can be charged from the solar power source SS. Then, power can be supplied from the solar power source SS to the load LD. Furthermore, power can be supplied to the load LD from the power storage devices BL1 and BL2.

(Embodiment 32)
As shown in FIG. 40, the power conversion device 1 of the present embodiment is connected to five voltage units 4 including a power storage device BL, a solar power supply SS, a DC power supply DCS, a load LD, and a high-voltage battery BH.
In the present embodiment, it is possible to supply power from the solar power source SS to the load LD while the DC power source DCS is charging the high voltage battery BH. Thereby, for example, when the load LD is a heater, the heater heating time can be shortened.
Further, the power storage device BL can be charged from the DC power supply DCS and the solar power supply SS.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 33)
As shown in FIG. 41, the power conversion device 1 of the present embodiment is connected to two power storage devices BL1 and BL2, a DC power supply DCS, a load LD, and a five voltage unit 4 of a high-voltage battery BH.
In the present embodiment, electric power can be supplied from power storage devices BL1 and BL2 to load LD during charging of DC power supply DCS to high voltage battery BH. Further, it is possible to supply electric power from the DC power supply DCS to the load LD.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 34)
As shown in FIG. 42, the power conversion device 1 of the present embodiment is connected to two power storage devices BL1 and BL2, a DC power supply DCS, a load LD, and five voltage units 4 of a high-voltage battery BH.
In the present embodiment, it is possible to charge the high voltage battery BH from the solar power source SS while the DC power source DCS is charging the high voltage battery BH. At this time, the high voltage battery BH can also be charged from the power storage devices BL1 and BL2. Further, instead of charging from DC power supply DCS and sunlight power supply SS, high voltage battery BH can be charged from at least one of power storage devices BL1 and BL2. That is, power supply redundancy can be achieved.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 35)
As shown in FIG. 43, the power conversion device 1 of this embodiment is connected to five voltage units 4 including a load LD, a power storage device BL, an AC power supply ACS, a solar power supply SS, and a high-voltage battery BH.
In the present embodiment, it is possible to supply electric power from the solar power source SS to the load LD while the AC power source ACS is charging the high voltage battery BH. Thereby, for example, when the load LD is a heater, the heater heating time can be shortened. Further, the power storage device BL can be charged from the AC power supply ACS and the solar power supply SS. Further, the high voltage battery BH can be charged by the electric power of the power storage device BL.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 36)
As shown in FIG. 44, the power conversion device 1 of the present embodiment is connected to five voltage units 4 of a load LD, a DC power supply DCS, an AC power supply ACS, a solar power supply SS, and a high-voltage battery BH.
In the present embodiment, it is possible to charge the high voltage battery BH from both the direct current power supply DCS and the solar power supply SS while the AC power supply ACS is charging the high voltage battery BH. Alternatively, power can be supplied from the solar power source SS to the load LD while the high voltage battery BH is being charged from the AC power source ACS or the like.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 37)
As shown in FIG. 45, the power conversion device 1 of the present embodiment is connected to five voltage units 4 including a load LD, a DC power supply DCS, an AC power supply ACS, a power storage device BL, and a high-voltage battery BH.
In the present embodiment, power storage device BL can be a power storage device other than the 12V system.
Also in this embodiment, the high voltage battery BH can be charged from the AC power supply ACS and the DC power supply DCS. At this time, power can be supplied from the power storage device BL to the load LD. Further, the power of at least one of the AC power supply ACS and the DC power supply DCS can be supplied to the load LD.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 38)
As shown in FIG. 46, the power conversion device 1 of the present embodiment is connected to five voltage units 4 of a solar power source SS, a DC power source DCS, an AC power source ACS, a power storage device BL, and a high voltage battery BH.
In the present embodiment, the high voltage battery BH can be charged from the AC power supply ACS, the DC power supply DCS, and the solar power supply SS. Further, the power storage device BL can be charged by at least one of the AC power supply ACS, the DC power supply DCS, and the solar power supply SS.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 39)
As shown in FIG. 47, the power conversion device 1 of the present embodiment is connected to five voltage units 4 of a solar power source SS, a power storage device BL, an AC power source ACS, a load LD, and a high voltage battery BH.
In the present embodiment, it is possible to charge the high-voltage battery BH from the solar power source SS while charging the high-voltage battery BH from the AC power supply ACS. Further, power can be supplied to the load LD from at least one of the AC power supply ACS and the solar power supply SS. Further, the power storage device BL can be charged from at least one of the AC power supply ACS and the sunlight power supply SS.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 40)
As shown in FIG. 48, the power conversion device 1 of the present embodiment is connected to two power storage devices BL1 and BL2, an AC power supply ACS, a load LD, and five voltage units 4 of a high-voltage battery BH.
In the present embodiment, power can be supplied from power storage devices BL1 and BL2 to load LD during charging of high-voltage battery BH from AC power supply ACS. Further, the power of one power storage device BL1 can be used as the control power for controlling the operation of the load LD.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 41)
As shown in FIG. 49, the power conversion device 1 of the present embodiment is connected to five voltage units 4 of two power storage devices BL1 and BL2, an AC power supply ACS, a solar power supply SS, and a high-voltage battery BH.

In the present embodiment, the high voltage battery BH can be charged from the solar power source SS while the AC power source ACS is charging the high voltage battery BH. Further, the power storage devices BL1 and BL2 can be charged from at least one of the AC power supply ACS and the sunlight power supply SS. Further, the high-voltage battery BH can be charged from any one of the AC power supply ACS, the solar power supply SS, and the two power storage devices BL1 and BL2. That is, power supply redundancy can be achieved.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 42)
As shown in FIG. 50, the power conversion device 1 of the present embodiment is connected to five voltage units 4 of a DC power supply DCS, a power storage device BL, an AC power supply ACS, a load LD, and a high voltage battery BH.
In the present embodiment, power storage device BL can be a 12V power storage device.

In the present embodiment, the high voltage battery BH can be charged from the AC power supply ACS and the DC power supply DCS. At this time, power can be supplied to the load LD from at least one of the AC power supply ACS and the DC power supply DCS. Further, the electric power of power storage device BL can be used as an output for controlling the operation of load LD.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 43)
As shown in FIG. 51, the power conversion device 1 of the present embodiment is connected to five voltage units 4 including a DC power supply DCS, a power storage device BL, an AC power supply ACS, a solar power supply SS, and a high voltage battery BH.

In the present embodiment, the high voltage battery BH can be charged from the AC power supply ACS, the DC power supply DCS, and the solar power supply SS. That is, the high-voltage battery BH can be charged from any one or more of these three power sources. Further, power storage device BL can be charged from any one or more of these three power sources. Further, the high voltage battery BH can be charged from the power storage device BL. Further, the electric power of power storage device BL can also be used as electric power for control when charging high-voltage battery BH from AC power supply ACS or the like.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 44)
As shown in FIG. 52, the power conversion device 1 of the present embodiment is a power conversion device that is connected to six voltage units 4.
The power conversion device 1 includes six power conversion circuit parts (that is, switching circuit parts 21, 22, 23, 24, 25, 26) and six switching circuit parts 21 that are respectively connected to the six voltage parts 4. , 22, 23, 24, 25, and 26, and a multiport transformer 3 connected at different ports. In this embodiment, the multiport transformer 3 has six coils magnetically coupled to each other.

  In this embodiment, two power storage devices BL1 and BL2, a load LD, an AC power supply ACS, a DC power supply DCS, and a high-voltage battery BH are connected to the power conversion device 1 as the six voltage units 4.

  The power conversion device 1 of the present embodiment can mutually perform power conversion between the six voltage units 4 via one multiport transformer 3. Therefore, power conversion between the plurality of voltage units 4 can be performed via one multi-port transformer 3 in an extremely large number of combinations.

  That is, in the case where the six voltage units 4 exist, 15 combinations are possible as a combination of two pieces. Therefore, the power conversion between the voltage units 4 can be performed through the one multiport transformer 3 in 15 combinations. Therefore, it is possible to remarkably exchange power between the voltage units 4 in a large number of combinations while suppressing an increase in the number of parts and the physique.

The power converter 1 of this embodiment can charge the high-voltage battery BH from the AC power supply ACS, the DC power supply DCS, and the two power storage devices BL1 and BL2. Further, power can be supplied to the load LD from the AC power supply ACS, the DC power supply DCS, and the two power storage devices BL1 and BL2. Further, for example, one of the power storage devices BL1 (for example, 12V system) can be used as the power for charging control or the power for controlling the operation of the load LD.
Other than that, the same configurations and effects as those of the twenty-ninth embodiment are provided.

(Embodiment 45)
As shown in FIG. 53, the power conversion device 1 of the present embodiment is connected to a DC power supply DCS, two power storage devices BL1 and BL2, a solar power supply SS, a load LD, and six voltage units 4 of a high-voltage battery BH. .

In the present embodiment, while charging the high voltage battery BH from the DC power supply DCS, the high voltage battery BH can be charged from at least one of the solar power supply SS and the power storage devices BL1 and BL2. Further, power can be supplied to the load LD from the DC power supply DCS, the solar power supply SS, and the power storage devices BL1 and BL2. Further, for example, the electric power of one power storage device BL1 (for example, 12V system) can be used as the electric power for charge control or the electric power for operation control of the load LD.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 46)
As shown in FIG. 54, the power conversion device 1 of the present embodiment is connected to six voltage units 4 of a DC power supply DCS, a load LD, a solar power supply SS, a power storage device BL, an AC power supply ACS, and a high-voltage battery BH. .

In this embodiment, the high voltage battery BH can be charged from the DC power supply DCS, the AC power supply ACS, and the solar power supply SS. Furthermore, high voltage battery BH can be charged from power storage device BL. In addition, power can be supplied to the load LD from the DC power supply DCS, the AC power supply ACS, the solar power supply SS, and the power storage device BL.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 47)
As shown in FIG. 55, the power conversion device 1 of the present embodiment is connected to two voltage storage devices BL1 and BL2, a load LD, a solar power source SS, an AC power source ACS, and a high voltage battery BH. .

In this embodiment, the high voltage battery BH can be charged from the AC power supply ACS and the solar power supply SS. Furthermore, high voltage battery BH can be charged also from power storage devices BL1 and BL2. In addition, power can be supplied to the load LD from the AC power supply ACS, the solar power supply SS, and the power storage devices BL1 and BL2.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 48)
As shown in FIG. 56, the power conversion device 1 of the present embodiment is connected to six voltage units 4 of a power storage device BL, a load LD, a solar power source SS, an AC power source ACS, a DC power source DCS, and a high voltage battery BH. .

In this embodiment, the high voltage battery BH can be charged from the DC power supply DCS, the AC power supply ACS, and the solar power supply SS. In addition, power can be supplied to the load LD from the DC power supply DCS, the AC power supply ACS, the solar power supply SS, and the power storage device BL. Further, the electric power of the power storage device BL (for example, 12V system) can also be used as the electric power for charge control or the electric power for operation control of the load LD.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 49)
As shown in FIG. 57, the power conversion device 1 of the present embodiment is connected to six voltage units 4 of two power storage devices BL1 and BL2, a solar power supply SS, an AC power supply ACS, a DC power supply DCS, and a high-voltage battery BH. There is.

In this embodiment, the high voltage battery BH can be charged from the DC power supply DCS, the AC power supply ACS, and the solar power supply SS. Further, as the electric power for charge control, for example, the electric power of one power storage device BL1 (for example, 12V system) can be used. Further, the power storage devices BL1 and BL2 can be charged from the DC power supply DCS, the AC power supply ACS, and the solar power supply SS.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 50)
As shown in FIG. 58, the power conversion device 1 of the present embodiment is a power conversion device that is connected to seven voltage units 4.
The power conversion device 1 includes seven power conversion circuit units (that is, switching circuit units 21, 22, 23, 24, 25, 26, 27), which are respectively connected to the seven voltage units 4, and seven switching circuits. The parts 21, 22, 23, 24, 25, 26, and 27 have a multiport transformer 3 connected at different ports. In the present embodiment, the multiport transformer 3 has seven coils that are magnetically coupled to each other.

  In the present embodiment, as the seven voltage units 4, two power storage devices BL1 and BL2, a solar power supply SS, an AC power supply ACS, a DC power supply DCS, a load LD, and a high-voltage battery BH are connected to the power conversion device 1. There is.

  The power conversion device 1 of the present embodiment can mutually perform power conversion between the seven voltage units 4 via one multiport transformer 3. Therefore, power conversion between the plurality of voltage units 4 can be performed via one multi-port transformer 3 in an extremely large number of combinations.

  That is, when there are seven voltage units 4, 21 combinations are possible as a combination of two sets. Therefore, the power conversion between the voltage units 4 can be performed through the one multiport transformer 3 in 21 combinations. Therefore, it is possible to remarkably exchange power between the voltage units 4 in a large number of combinations while suppressing an increase in the number of parts and the physique.

The power converter 1 of this embodiment can charge the high-voltage battery BH from the AC power supply ACS, the DC power supply DCS, the solar power supply SS, and the two power storage devices BL1 and BL2. In addition, power can be supplied to the load LD from the AC power supply ACS, the DC power supply DCS, the solar power supply SS, and the two power storage devices BL1 and BL2. Further, for example, one of the power storage devices BL1 (for example, 12V system) can be used as the power for charging control or the power for controlling the operation of the load LD.
Other than that, it has the same configuration and effects as those of the forty-fourth embodiment.

(Embodiment 51)
As shown in FIG. 59, the power conversion device 10 of the present embodiment has a plurality of power conversion units 1a and 1b and a connection wiring section 5.
The power conversion units 1a and 1b have one multi-port transformer 3a and 3b and three or more power conversion circuit units 21a, 22a, 23a, 21b, 22b and 23b, respectively. The three or more power conversion circuit units 21a, 22a, 23a, 21b, 22b, and 23b are respectively connected to three or more ports in the multiport transformers 3a and 3b.
The connection wiring part 5 electrically connects at least one power conversion circuit part 21a, 22a, 23a, 21b, 22b, 23b in each power conversion unit 1a, 1b electrically in parallel.

  In the power conversion device 10 of the present embodiment shown in FIG. 59, in particular, the connection wiring section 5 has one power conversion circuit section 22a in one power conversion unit 1a and one connection circuit section in another power conversion unit 1b. The power conversion circuit section 22b is connected in parallel.

Further, in the power conversion device 10 of the present embodiment, the connection wiring section 5 is connected to the terminals on the opposite side of the multiport transformers 3a and 3b in the power conversion circuit sections 22a and 22b.
Each of the power conversion units 1a and 1b can be, for example, the same as the power conversion device 1 of the first embodiment.

Then, for example, as shown in FIG. 60, in each of the power conversion circuit units 21a, 22a, 23a, 21b, 22b, 23b in the power conversion units 1a, 1b, as the voltage unit 4, the high voltage battery BH, the power storage device BL, the load It is conceivable to connect the LD and the solar power source SS.
Specifically, the power conversion circuit units 21a and 21b of the two power conversion units 1a and 1b are connected in parallel to the high-voltage battery BH. The power conversion circuit unit 22a of the power conversion unit 1a is connected to the power storage device BL, and the power conversion circuit unit 23a is connected to the load LD. Moreover, the power conversion circuit unit 23b of the power conversion unit 1b is connected to the solar power source SS. Since the power conversion circuit unit 22b of the power conversion unit 1b is connected to the power conversion circuit unit 22a of the power conversion unit 1a via the connection wiring unit 5, it should also be connected to the power storage device BL. Becomes That is, the power storage device BL is in a state in which the two power conversion circuit units 22a and 22b are connected in parallel.

  The power conversion device 10 of the present embodiment includes a plurality of power conversion units 1a and 1b and a connection wiring section 5. And the connection wiring part 5 electrically connects the power conversion circuit parts 22a and 22b in each power conversion unit 1a and 1b electrically in parallel. Therefore, it is also possible to transfer power between the power conversion circuit units 22a and 22b between the plurality of power conversion units 1a and 1b. As a result, even when a failure occurs in a part of the power conversion circuit section (for example, the power conversion circuit section 21a) of a part of the power conversion unit (for example, the power conversion unit 1a), another power conversion circuit section. (For example, the power conversion circuit portion 21b) can be substituted for the function. As a result, the redundancy of the power conversion device 10 can be improved.

  That is, for example, in the power conversion device 10 in which a plurality of voltage units 4 are connected as shown in FIG. 60, when the power conversion circuit unit 21a of the power conversion unit 1a fails, the high voltage battery BH passes through the multi-port transformer 3a. As a result, power cannot be supplied to power storage device BL. However, in this case, power can be supplied to the power storage device BL via the power conversion circuit units 21b and 22b and the connection wiring unit 5 in the multi-port transformer 3b of the power conversion unit 1b. As a result, for example, it is possible to ensure electric power supply to the ECU (abbreviation of electronic control unit) necessary for traveling of the vehicle and continue traveling.

Further, in the above case, it is not possible to supply power from the high voltage battery BH to the load LD via the power conversion circuit section 21a of the power conversion unit 1a. However, it becomes possible to supply power to the load LD via the power conversion unit 1b, the connection wiring section 5, and the power conversion circuit sections 22a and 23a of the power conversion unit 1a.
Thus, the power converter 10 with high redundancy can be obtained.

(Comparative form 1)
As a comparative form, as shown in FIG. 61, a form in which two general transformers 93 having two ports are provided is shown. In this power converter 9, power conversion circuit units 921a and 922a are connected to two ports of one transformer 93a, and power conversion circuit units 921b and 922b are connected to two ports of the other transformer 93b. There is. The high-voltage battery BH is connected to the power conversion circuit units 921a and 921b, the power storage device BL is connected to the power conversion circuit unit 922a, and the load LD is connected to the power conversion circuit unit 922b. In this mode, if a failure occurs in the power conversion circuit unit 921a, power cannot be supplied from the high voltage battery BH to the power storage device BL.

  On the other hand, as described above, in the power conversion device 10 of the fifty-first embodiment, the power supply from the high voltage battery BH to the power storage device BL can be continued even if the power conversion circuit unit 21a fails. (See FIG. 60). Therefore, the power conversion device 10 of the fifty-first embodiment can improve redundancy as compared with the first comparative embodiment.

(Reference form 28)
As a reference mode, as shown in FIG. 62, consider a power conversion device 90 in which multiport transformers 3a and 3b are arranged in parallel and a connection wiring portion 5 is not provided.
Also in the power conversion device 90 of Reference Embodiment 28, when a failure occurs in the power conversion circuit unit 21a, power cannot be supplied from the high voltage battery BH to the power storage device BL. Therefore, the power conversion device 10 according to the fifty-first embodiment can also improve redundancy with respect to the power conversion device 90 according to the twenty-eighth embodiment.

  Further, in the power conversion device 10 of the fifty-first embodiment, as shown in FIG. 60, the power storage device BL is connected to the connection wiring section 5. That is, the power conversion circuit units 22a and 22b connected by the connection wiring unit 5 are connected to the power storage device BL. Accordingly, for example, even if a momentary power failure occurs due to a failure of the power conversion circuit unit 21a or the like, power can be supplied to the load LD, the solar power source SS, the high voltage battery BH, and the like. Therefore, the power conversion device 10 with even higher redundancy can be provided.

  In addition, in the power conversion device 10 of the fifty-first embodiment, it is possible to exchange power between the power conversion circuit units 22a and 22b that are connected to each other by the connection wiring unit 5. Accordingly, the temperature of the power conversion elements in the power conversion circuit sections 22a and 22b is appropriately raised, and when the temperature of the cooling water in the power conversion circuit section is likely to drop too much, for example, at the time of starting in a cold region, cooling is performed. The water can be heated efficiently.

  Although not shown, each power conversion unit 1a, 1b may have a multi-port transformer having four or more ports and four or more power conversion circuit parts. In this case, the power conversion units 1a and 1b may be the same as the power conversion device 1 of the ninth embodiment, for example.

  Further, a disconnecting mechanism can be interposed in the connection wiring section 5. That is, a disconnection mechanism capable of switching between electrical connection and disconnection, such as a relay or a semiconductor switch, can be provided in a part of the connection wiring section 5. As a result, the disconnection mechanism can be switched on and off as necessary to transfer power between the power conversion units 1a and 1b.

(Embodiment 52)
In this embodiment, as shown in FIG. 63, the connection wiring portion 5 is connected to the power conversion circuit portions 22a and 22b on the multiport transformer 3a and 3b sides.
Others are the same as those of the fifty-first embodiment.

In this case, for example, when a failure occurs in one of the power conversion circuit section 21a and the power conversion circuit section 21b, the function can be substituted by the other power conversion circuit section.
For example, when the voltage unit 4 is connected as shown in FIG. 64, the following measures are possible in this embodiment. That is, for example, when a failure occurs in the power conversion circuit section 21a, the power supply to the power storage device BL is maintained via the power conversion circuit section 21b, the multiport transformer 3b, and the power conversion circuit section 22a. You can

In addition, it is possible to operate the load LD1 by supplying power from the power conversion circuit sections 21b and 22b to the power conversion circuit section 23a via the connection wiring section 5 and the multiport transformer 3a.
Alternatively, even when the power supply from the high-voltage battery BH to the power storage device BL is interrupted, the power conversion circuit unit 23b, the multi-port transformer 3b, the connection wiring unit 5, and the power conversion circuit unit 22a are disconnected from the solar power source SS. Power can be supplied to the power storage device BL via the power storage device BL.
Other than that, the same operation and effect as those of the embodiment 51 are obtained.

(Reference form 29)
In this embodiment, as shown in FIG. 65, two power conversion circuit units 21a, 23a, 21b, and 23b are connected to multiport transformers 3a and 3b having three ports, respectively.
Then, the remaining ports of the multi-port transformers 3a and 3b to which the power conversion circuit section is not connected are connected by the connection wiring section 51. That is, the winding portions of each of the multi-port transformers 3a and 3b are electrically connected to each other.
Others are the same as those of the fifty-first embodiment.

  In the present embodiment, power can be supplied between the plurality of power conversion units 9a and 9b via the connection wiring portion 51 at the port to which the power conversion circuit section is not connected.

Other than the above-described embodiment, various modifications can be made.
Further, in each of the above-described embodiments and each reference mode, a part of the operation and effect that each mode can achieve has been described, but the operation and effect obtained by each embodiment and each reference mode may occur in addition to these. Each of the embodiments and each of the reference embodiments can exert various operational effects that can be derived from the entire specification and drawings.

Further, in the above-described embodiments and reference embodiments, the mode in which the switching circuit unit (that is, the power conversion circuit unit) is directly connected to the voltage unit is shown, but between the switching circuit unit and the voltage unit, A PFC circuit (that is, a power factor correction circuit) may be interposed.
In addition, a relay may be interposed in each of positive and negative wirings between the switching circuit unit (that is, the power conversion circuit unit) and the load or the power storage device. The relay may be, for example, a mechanical relay, a semiconductor relay, or the like. Alternatively, instead of the relay, a power cutoff mechanism having a function equivalent to these may be provided.

  The present invention is not limited to the above-described embodiments, but can be applied to various embodiments without departing from the spirit of the invention.

1, 10 Power conversion device 21, 22, 23, 24, 25, 26, 27 Power conversion circuit unit (switching circuit unit)
3, 3a, 3b Multi-port transformer 4 Voltage part 5 Connection wiring part LD Load BH Vehicle drive battery (high voltage battery)

Claims (6)

A power converter (1) connected to three or more voltage parts (4),
Three or more power conversion circuit units (21, 22, 23, 24, 25, 26, 27) respectively connected to the three or more voltage units, and
A multi-port transformer (3) connected to each of the three or more power conversion circuit units at different ports,
At least one of the voltage units is a load (LD). A power converter (1) connected to three or more voltage parts (4),
Three or more power conversion circuit units (21, 22, 23, 24, 25, 26, 27) respectively connected to the three or more voltage units, and
A multi-port transformer (3) connected to each of the three or more power conversion circuit units at different ports,
The three or more voltage units connected to each other include at least a vehicle drive battery (BH) and a plurality of power supply units for supplying power to the vehicle drive battery from outside the vehicle. .   The power conversion device according to claim 2, wherein the plurality of power supply units include at least two of an alternating current power supply (ACS), a direct current power supply (DCS), and a solar power supply (SS). A power converter (1) connected to four or more voltage parts (4),
Four or more power conversion circuit parts (21, 22, 23, 24, 25, 26, 27) respectively connected to the four or more voltage parts, and
A power conversion device comprising: a multi-port transformer (3) connected to each of the four or more power conversion circuit units at different ports. One multi-port transformer (3a, 3b) and three or more power conversion circuit units (21a, 22a, 23a, 21b, 22b, 23b) respectively connected to three or more ports in the multi-port transformer A plurality of power conversion units (1a, 1b) each having
A power conversion device (10) comprising: a connection wiring part (5) for electrically connecting in parallel at least one of the power conversion circuit parts in each of the power conversion units.   The power conversion device according to claim 5, wherein a power storage device (BL) is connected to the connection wiring portion.

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