JP2013115724A - Charging system and on-vehicle system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging system and an on-vehicle system that can use, as a power source, a vehicle and the like adapted to power line communication for transmitting a communication signal using, as a medium, a power supply line included in a charging cable for connecting the vehicle and a power supply device, and that prevent a bad influence such as mixing of noise on a power load connected to the vehicle and the like as a power source.SOLUTION: In a power line communication for connecting a power supply device 2 and a vehicle 1 mounting a power storage device 10 supplied power by the power supply device 2 with power supply lines 31, 32, power supply branches 116, 117 which branch off from the power supply lines 31, 32 and comprise a connection part 118, such as a household outlet, capable of connecting a power load such as a household electric appliance are provided. In addition, cut-off means 116a, 117a such as a low-pass filter which are interposed on the power supply branches and cut off a signal in a band related to the communication signal are arranged.

Description

  The present application relates to a charging system and an in-vehicle system in which a power feeding device and a vehicle equipped with a power storage device fed from the power feeding device are connected by a power feeding line and a communication signal is transmitted using the power feeding line as a medium.

  2. Description of the Related Art In recent years, electric vehicles and hybrid vehicles that are equipped with devices such as a motor and a battery and run by driving the motor with electric power stored in the battery have begun to spread. The electric vehicle charges the battery by supplying power from an external power supply device. Moreover, even if it is a hybrid vehicle, a plug-in hybrid vehicle that can charge a battery from an external power supply device has been put into practical use. The external power supply device is a power supply device installed in a facility such as a general house or a commercial power supply station. When power is supplied from the power supply device to the vehicle, the plug at the end of the charging cable connected to the power supply device is connected to a power supply port provided in the vehicle as a power receiving connector. Then, power is supplied from the power supply device to the vehicle via the power supply line included in the charging cable, and the battery is charged.

  When commercializing electric vehicles that require power supply from the outside, such as electric vehicles and hybrid vehicles, information for charging control and communication information for managing charge amount or billing are exchanged between the vehicle and the power supply device. A communication function for transmitting and receiving data is required.

  Therefore, standardization of communication such as power line communication in which communication is performed between the vehicle and the power supply apparatus is being performed by superimposing a communication signal on the power supply line (see, for example, Patent Document 1).

  FIG. 7 is an explanatory diagram showing an example of the configuration of power line communication that is being standardized. In FIG. 7, reference numeral 1000 denotes a vehicle, and the vehicle 1000 is connected by a charging cable 3000 when power is supplied from the power supply apparatus 2000. The charging cable 3000 includes a pair of power supply lines 3001 and 3002 used as power supply lines and a ground line 3003 that is a conductor for grounding.

  One end of the charging cable 3000 is connected to the power feeding device 2000 side, and a plug 3004 provided on the other end side is connected to a power receiving connector 1001 provided as a connecting portion at a power feeding port on the vehicle 1000 side. Power supply is possible.

  The power supply apparatus 2000 includes a power supply unit 2001 that supplies AC power, a communication unit 2002 that transmits and receives communication signals, and a superposition / separation unit 2003 that superimposes and separates communication signals on the power supply lines 3001 and 3002. ing.

  Then, the superimposing / separating unit 2003 superimposes various communication signals on the power supply lines 3001 and 3002, and separates the superimposed various communication signals. The superimposing / separating unit 2003 superimposes various communication signals output from the communication unit 2002, and inputs the separated various communication signals to the communication unit 2002, whereby communication of the communication unit 2002 is performed.

  Vehicle 1000 includes power receiving connector 1001, power storage device 1002, charging device 1003 that charges power storage device 1002, communication device 1004 that transmits and receives communication signals, and superimposition of communication signals on power supply lines 3001 and 3002. And a superimposing separator 1005 that performs separation.

  The superimposing / separating device 1005 superimposes various communication signals on the power supply lines 3001 and 3002, and separates the superimposed various communication signals. The superimposing / separating device 1005 superimposes various communication signals output from the communication device 1004, and inputs the separated various communication signals to the communication device 1004, whereby communication of the communication device 1004 is performed.

  Furthermore, recently, the use of such a vehicle such as an electric vehicle as a power source has begun to be studied.

JP-A-6-245325

  However, when a power load is connected and used with the vehicle as a power source during execution of power line communication, there is a problem that the use of the power load may adversely affect the power line communication and may reduce the communication quality.

  In addition, there is a problem that power line communication has an adverse effect such as noise mixing on a power load using a vehicle as a power source, which may cause a malfunction in the power load.

  The present invention has been made in view of such circumstances, and a power supply branch line used for connection of a power load is branched from the power supply line, and a cutoff means for cutting off a signal in a band related to a communication signal is provided in the power supply branch line. . As a result, a charging system and an in-vehicle device capable of reducing the possibility of occurrence of an abnormality such as a deterioration in communication quality or malfunction of the power load while allowing the power related to the power supply to be used by another power load The purpose is to provide a system.

  The charging system according to the present invention is a charging system in which a power feeding device and a vehicle equipped with a power storage device fed from the power feeding device are connected by a power feeding line, and a communication signal is transmitted using the power feeding line as a medium. A power supply branch that branches from the electric wire, a connection that is provided in the power supply branch and is capable of connecting a power load, and a blocking means that is interposed in the power supply branch and blocks a signal in a band related to the communication signal. It is characterized by providing.

  The charging system according to the present invention is characterized in that the blocking means is a choke coil.

  An in-vehicle system according to the present invention is an in-vehicle system that transmits a communication signal using a power supply line used for power supply to a power storage device mounted on a vehicle as a medium, and a power supply branch that branches from the power supply line, and is provided in the power supply branch. And a connection unit capable of connecting an electric power load, and a blocking means interposed in the power supply branch line and blocking a signal in a band related to the communication signal.

  In the present invention, it is possible to prevent the communication signal from flowing out to the electric power load through the feeder branch line by the blocking means.

  In the charging system and the in-vehicle system according to the present invention, the interruption means prevents the communication signal from flowing into the power load, so that it is possible to prevent the occurrence of an abnormality such as a decrease in communication quality due to the attenuation of the communication signal. There are excellent effects.

  In addition, it is possible to prevent the occurrence of an abnormality such as a malfunction of the power load due to mixing of communication signals.

It is explanatory drawing which shows the structural example of the charging system which concerns on this invention. It is a graph which shows an example of the attenuation characteristic in the transmission path | route of a communication signal. It is a circuit diagram which shows an example of the simple equivalent circuit with respect to the charging system of this invention. It is a circuit diagram which shows an example of the simple equivalent circuit with respect to the charging system of this invention. It is a circuit diagram which shows an example of the simple equivalent circuit with respect to the charging system of this invention. It is a graph which shows an example of the simulation result in the simple equivalent circuit with respect to the charging system of this invention. It is explanatory drawing which shows the structural example of the power line communication in which standardization is advanced.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

  FIG. 1 is an explanatory diagram showing a configuration example of a charging system according to the present invention. FIG. 1 shows an example in which the charging system of the present invention is applied to a form in which a power storage device 10 such as a battery provided in a vehicle 1 such as an electric vehicle or a plug-in hybrid vehicle is fed from a power feeding device 2 such as a charging stand. ing.

  The vehicle 1 and the power supply device 2 can be connected by a charging cable 3. The charging cable 3 includes two power supply lines 31 and 32 that are used as power supply lines and a grounding wire 33 that is a grounding conductor. One end of the charging cable 3 is connected to the power feeding device 2 side, and the plug 30 provided on the other end side is connected to the power receiving connector 11 arranged as an in-vehicle power feeding port serving as a connection part on the vehicle 1 side. be able to. By connecting the plug 30 at the other end of the charging cable 3 to the power receiving connector 11, the connection terminals 30 a, 30 b, 30 c provided at the ends of the power supply lines 31, 32 and the ground line 33 in the charging cable 3 are Contacting the connection terminals 11a, 11b, and 11c provided in the power receiving connector 11, the circuit configuration illustrated in FIG. 1 is obtained.

  The feeder lines 31 and 32 are AC lines to which an AC voltage is applied. The power supply lines 31 and 32 can also be used as a medium for transmitting information for performing management such as vehicle authentication, charging management, billing management, and other various information. That is, the vehicle 1 and the power feeding device 2 can communicate by superimposing and separating the communication signals on the power feeding lines 31 and 32.

  The power supply apparatus 2 includes a power supply unit 20 that supplies AC power, a communication unit 21 that transmits and receives communication signals, and a superposition / separation unit 22 that superimposes and separates communication signals on the power supply lines 31 and 32. ing.

  One end of power supply lines 31 and 32 and a ground line 33 are connected to the power supply unit 20. The wiring in the power feeding device 2 is an internal conductor that functions as an extension line connected to the power feeding lines 31 and 32 and the grounding wire 33 included in the charging cable 3 outside the power feeding device 2. For the sake of convenience, the power supply lines 31 and 32 and the ground line 33 will be described including the extension line portion disposed as the internal conductor.

  The superimposing / separating unit 22 is connected to branch lines 310 and 320 branched from the power supply lines 31 and 32 via capacitors 310a and 320a, respectively, and a circuit such as a coupling transformer (electromagnetic induction type signal converter) is provided. Constructed using. In the example illustrated in FIG. 1, the superposition / separation unit 22 includes a primary coil 220 connected to the power supply lines 31 and 32 via capacitors 310 a and 320 a and a secondary coil 221 that is electromagnetically coupled to the primary coil 220. Prepare. Further, the secondary coil 221 is connected to the communication unit 21.

  The superposition / separation unit 22 superimposes various communication signals on the feeder lines 31 and 32 and separates the various communication signals superimposed. The superimposing / separating unit 22 superimposes various communication signals output from the communication unit 21 and inputs the separated various communication signals to the communication unit 21, thereby transmitting and receiving communication signals using the feeder lines 31 and 32 as a medium. Communication of the communication unit 21 is performed.

  In addition to the power storage device 10 and the power receiving connector 11, the vehicle 1 includes a charging device 12 that charges the power storage device 10, a communication device 13 that transmits and receives communication signals, and superimposition of communication signals on power supply lines 31 and 32. And a superposition separator 14 that performs separation.

  By connecting the plug 30 of the charging cable 3 to the power receiving connector 11 of the vehicle 1, connection terminals 30 a provided at the other ends of the power supply lines 31 and 32 included in the charging cable 3 and at the other end of the ground line 33, respectively. , 30b, 30c are connected to connection terminals 11a, 11b, 11c provided in the power receiving connector 11.

  In the power receiving connector 11, internal wirings 111, 112, 113 connected to the power supply lines 31, 32 and the ground line 33 via connection terminals 11 a, 11 b, 11 c are provided. The other ends of the internal wirings 111 and 112 connected to the power supply lines 31 and 32 are connected to the charging device 12 via an AC line disposed inside the vehicle 1, and the power storage device 10 is connected by the charging device 12. Is charged. The other end of the internal wiring 113 connected to the ground line 33 is connected to the charging device 12 and the power storage device 10 via an internal wiring in the vehicle 1 or a vehicle earth (body earth). In the following description, when there is no particular need to divide, for convenience, the internal wiring and the AC line including the power supply lines 31 and 32 and the ground line 33 will be described.

  Branch lines 114 and 115 are branched from the middle of the feeder lines 31 and 32 (internal wirings 111 and 112). Capacitors 114 a and 115 a are interposed in the branch lines 114 and 115, respectively, and are connected to the superposition separator 14. The capacitors 114a and 115a have a function such as a high-pass filter that transmits a signal in a band used for a communication signal.

  The superposition separator 14 is a circuit such as a coupling transformer including a primary coil 140 connected to the branch lines 114 and 115 and a secondary coil 141 electromagnetically coupled to the primary coil 140. The secondary coil 141 is connected to the communication device 13.

  The superposition separator 14 superimposes various communication signals on the power supply lines 31 and 32 via the branch lines 114 and 115, and separates the various communication signals superimposed. The superimposing / separating device 14 superimposes various communication signals output from the communication device 13 and inputs the separated various communication signals to the communication device 13, thereby transmitting and receiving communication signals using the feeder lines 31 and 32 as a medium. Communication of the communication device 13 is performed.

  The communication device 13 has a function for transmitting and receiving various communication signals to and from the power supply device 2, and is connected to the superposition separator 14 by a pair of communication lines.

  Further, in the power receiving connector 11, power supply branch lines 116 and 117 are branched from the power supply lines 31 and 32 (internal wirings 111 and 112), and a power load can be connected to the tips of the power supply branch lines 116 and 117. A connecting portion 118 is provided. The connection unit 118 is configured as a household outlet into which a plug of a power load such as a household appliance can be inserted. In addition, low-pass filters 116a and 117a are interposed in the power supply branch lines 116 and 117 as blocking means for blocking signals in a band related to communication signals.

  For example, in the power receiving connector 11, the connection unit 118 is disposed at a position exposed to the outside during power feeding, and supplies power related to power feeding to another power load. In addition, when there is a difference between the power supplied via the power supply lines 31 and 32 and the power supplied from the connecting portion 118 via the power supply branch lines 116 and 117, a converter such as a transformer or a converter is provided as appropriate. . Although FIG. 1 shows an example in which the connection portion 118 is provided in the power receiving connector 11, the present invention is not limited to this, and the connection portion 118 may be disposed outside the power receiving connector 11.

  The low-pass filters 116a and 117a interposed in the power supply branch lines 116 and 117 will be described. As the low-pass filters 116a and 117a, choke coils are used. However, the choke coil is not necessarily required, and any element or circuit having a high impedance in a band related to a communication signal may be used. An inductance element having a high withstand voltage, an inductance element having a high withstand voltage, and a resistor are connected in parallel. Various elements or circuits such as a circuit can be used. Further, by forming the low-pass filters 116a and 117a integrally with the power receiving connector 11, it is possible to reduce the size as compared with the case where the low-pass filters 116a and 117a are individually formed. Can be saved.

  FIG. 2 is a graph showing an example of attenuation characteristics in the transmission path of communication signals. In FIG. 2, the horizontal axis represents frequency, and the vertical axis represents the relationship between the attenuation characteristics of communication signals in the transmission path and the signal ratio. FIG. 2 is a graph showing the attenuation characteristic of a communication signal when a household dryer with a relatively large amount of power consumption is connected to the connection unit 118 as the power load. A thick line indicates a case where the power load is not connected, and a thin line Shows a case where a power load is connected.

  As a frequency band used for communication signals, a band of 30 kHz to 450 kHz is allocated as a G3 band for low speed communication, and a band of 2 MHz to 30 MHz is allocated as a HPGP band for high speed communication. As shown in FIG. 2, when a power load with a relatively large power consumption such as a household dryer is connected, the HPGP band is not affected so much, but the G3 band has a maximum reduction of about 5 dB. Is seen.

  The low-pass filter 116a interposed in the feeder branch lines 116 and 117 has a function of suppressing attenuation of a communication signal to be transmitted to the communication device 13 due to the impedance of the power load connected in this way. 117a. And the effect of preventing the fall of the communication quality which concerns on power line communication is anticipated by suppressing attenuation | damping of a communication signal in the low-pass filters 116a and 117a. Further, it is possible to reduce the possibility that a communication signal becomes noise and an adverse effect such as malfunction occurs on the power load connected to the connection unit 118.

  Next, an example of the effect of the low-pass filters 116a and 117a will be described using a simulation test using a simple equivalent circuit as an example. 3 to 5 are circuit diagrams showing examples of simple equivalent circuits for the charging system of the present invention. 3-5, the power supply V1 respond | corresponds to the electric power supply part 20 in the charging system of this invention demonstrated using FIG. Similarly, the 5 nF capacitor C1 corresponds to the power feeding device 2, and the 5 nF capacitor C2 corresponds to the vehicle 1. The 1 kΩ resistor R1 corresponds to the communication device 13. Further, the 100 nF capacitor C3 corresponds to the power load, and the 100 μH choke coil L1 corresponds to the low-pass filters 116a and 117a.

  3 is a simplified equivalent circuit when no power load is connected, FIG. 4 is a simplified equivalent circuit when a power load is connected, and FIG. 5 is a case where the power load is connected via a low-pass filter. A simple equivalent circuit is shown. In addition, with respect to the resistance R1 on the vehicle side, the voltage is measured by the detector VDB, and the transmission path attenuation characteristic is obtained.

  FIG. 6 is a graph showing an example of a simulation result in a simple equivalent circuit for the charging system of the present invention. FIG. 6 shows the relationship in which the horizontal axis represents frequency and the vertical axis represents the attenuation characteristic based on the detection result by the detector VDB as a signal ratio. 6, the solid line indicates that the power load shown as the simple equivalent circuit in FIG. 3 is not connected, the alternate long and short dash line indicates the case where the power load indicated as the simple equivalent circuit in FIG. 4 is connected, and the wavy line in FIG. Attenuation characteristics are shown when a power load is connected through a low-pass filter shown as a simple equivalent circuit. As apparent from FIG. 6, there is a possibility that the communication signal is attenuated by connecting the power load. However, the attenuation can be prevented by interposing the low-pass filter.

  As is clear from the simulation test using such a simple equivalent circuit, in the charging system according to the present invention, in order to prevent the communication signal from flowing into the power load, an abnormality such as a decrease in communication quality due to the attenuation of the communication signal is obtained. It is possible to prevent the occurrence of the occurrence of excellent effects.

  The above embodiment only discloses a part of the myriad examples of the present invention, and can be appropriately designed in consideration of various factors such as purpose, application, and specifications. For example, in the above-described embodiment, a connection portion such as a household outlet is provided on the vehicle side. However, it is possible to design appropriately such as providing the connection portion on the power supply device side.

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Power storage device 11 Power receiving connector 11a, 11b, 11c Connection terminal 111, 112, 113 Internal wiring 114, 115 Branch line 114a, 115a Capacitor 116, 117 Feed branch 116a, 117a Low-pass filter (cutoff means)
DESCRIPTION OF SYMBOLS 118 Connection part 12 Charging apparatus 13 Communication apparatus 14 Superimposition separator 140 Primary coil 141 Secondary coil 2 Power feeding apparatus 20 Power supply part 21 Communication part 22 Superimposition separation part 220 Primary coil 221 Secondary coil 3 Charging cable 30 Plug 30a, 30b, 30c Connection terminal 31, 32 Feed line 310, 320 Branch line 310a, 320a Capacitor 33 Ground line

Claims (3)

In a charging system for connecting a power feeding device and a vehicle equipped with a power storage device fed from the power feeding device with a power feeding line and transmitting a communication signal using the power feeding line as a medium,
A feeder branch that branches off from the feeder;
A connection portion provided in the power supply branch line and capable of connecting a power load;
A charging system comprising: a blocking unit that is interposed in the power supply branch line and blocks a signal in a band related to the communication signal.   The charging system according to claim 1, wherein the blocking means is a choke coil. In an in-vehicle system that transmits a communication signal using a power supply line used for power supply to a power storage device mounted on a vehicle as a medium,
A feeder branch that branches off from the feeder;
A connection portion provided in the power supply branch line and capable of connecting a power load;
A vehicle-mounted system comprising: a blocking unit that is interposed in the power supply branch line and blocks a signal in a band related to the communication signal.

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