CN110723006A - Electrical system, method for providing charging by battery, electric and hybrid motor vehicle - Google Patents
Electrical system, method for providing charging by battery, electric and hybrid motor vehicle Download PDFInfo
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- CN110723006A CN110723006A CN201910568171.7A CN201910568171A CN110723006A CN 110723006 A CN110723006 A CN 110723006A CN 201910568171 A CN201910568171 A CN 201910568171A CN 110723006 A CN110723006 A CN 110723006A
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- Prior art keywords
- connection interface
- power factor
- correction circuit
- factor correction
- pfc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present disclosure provides an electrical system for a motor vehicle, a method for providing charging using a battery, an electric motor vehicle and a hybrid motor vehicle. The electrical system comprises an electrical charger (OBC-1) in charge of powering a high voltage power supply battery (HV), the electrical charger (OBC-1) comprising a power factor correction circuit (PFC) comprising a first connection interface (B1) and a second connection interface (B2), and a direct current to direct current converter (DC/DC) comprising a first connection interface (B3) and a second connection interface (B4), wherein the electrical charger (OBC-1) comprises two operating modes: a "direct" mode, in which the external electrical supply network (G1) supplies the high-voltage battery (HV); "reverse" mode, in which the high voltage battery (HV) provides charging, in which the electrical system comprises a short circuit of a direct current to direct current converter (DC/DC).
Description
Technical Field
The present invention relates generally to an electrical system, a method of providing charging with a battery, an electric and hybrid motor vehicle, the electrical system being configured to be particularly adapted to charge a battery on a motor vehicle, particularly an electric or hybrid motor vehicle.
More precisely, an electric or hybrid vehicle comprises a low-voltage supply battery that supplies the electrical equipment of the vehicle and a high-voltage supply battery that participates in propelling the vehicle. It is known that vehicles comprise an On-Board Charger, currently indicated with the acronym OBC "On-Board Charger", for charging a high-voltage supply battery and eventually a low-voltage supply battery, and an ac-dc converter for converting the voltage between an ac voltage source and said supply battery. On this background, the invention relates to an electrical system presenting several functions provided by an onboard charger and by an ac-dc converter.
Background
As is known, an electric or hybrid vehicle comprises an electric motor system powered by a high-voltage supply battery via an on-board high-voltage electric network, and a plurality of auxiliary electric devices powered by a low-voltage supply battery via an on-board low-voltage electric network. The high-voltage supply battery thus ensures the energy supply of the electric motor system to propel the vehicle. The low voltage supply battery powers auxiliary electrical devices such as vehicle computers, window motors, multimedia systems, and the like. High voltage power cells typically deliver a voltage between 100 and 900 volts, preferably between 100 and 500 volts, whereas low voltage power cells typically deliver a voltage of about 12, 24 or 48 volts. Both the high voltage supply battery and the low voltage supply battery must be able to be charged.
The electrical energy charging of the high-voltage supply battery is effected in a known manner by connecting it via the vehicle high-voltage electrical network to an external electrical supply network, for example an alternating-current household supply network. For this purpose, the high-voltage supply battery can be connected to an external electrical supply via an on-board electrical charging system designated as an on-board charger, which typically includes a rectifier circuit and a power factor correction circuit.
Fig. 1 shows a functional block diagram of a state of the art unidirectional (unidirectional) on-board electrical charger OBC-10, responsible for supplying a high-voltage supply battery HV, generally dedicated to the propulsion of electric or hybrid vehicles. The illustrated vehicle electrical charger OBC-10 comprises an electromagnetic filtering circuit (optional) EMC and a bidirectional power factor correction circuit (PFC), which comprises an alternating-to-direct converter (alternating-to-direct converter) receiving current from an external alternating current supply G1, for example of an alternating current household supply network.
The precharge module PC10 prevents high inrush currents from passing through the ac-dc converter circuit of the power factor correction circuit PFC when the system is turned on. In other words, the pre-charge module PC10 can prevent transient over-voltages generated when certain electrical receivers are turned on, and thus avoid an increase that charges too fast and too high, especially in the link capacitor (link capacitor) Clink. Corresponding to the on-board electrical charger operating mode OBC-10, designated as "direct mode", the pre-charge module PC10 is only activated when charging the HV supply battery.
Still referring to fig. 1, the power factor correction circuit PFC has the main function of eliminating the deformations of the external electrical supply network G1 caused by the currents absorbed by the system in order to prevent the occurrence of harmonic currents (harmonic currents) which damage the external electrical supply network.
Finally, the charging of the low-voltage supply battery (not shown in fig. 1) is carried out in a known manner by the high-voltage supply battery HV via a second DC-DC converter (not shown in the figure) connected between the HV supply battery and the low-voltage supply battery.
The charging of the high-voltage supply battery HV is therefore carried out by means of an on-board electrical charger OBC-10 in the vehicle. However, due to the unidirectional DC-DC converter DC/DC10, the on-board electrical charger OBC-10 is only able to charge the high-voltage supply battery HV, but cannot be reversed, i.e. it is not possible to use the charged high-voltage supply battery HV to provide charging.
One solution that may be obtained with an on-board bidirectional electrical charger OBC-10 is to replace the unidirectional DC-DC converter DC/DC10 with another bidirectional DC-DC converter. However, a bidirectional DC-DC converter is more expensive than a unidirectional DC-DC converter. In addition, such a solution is cumbersome, since it does not allow to easily modify the onboard electrical charger OBC-10 by adding low-cost components as presented above, but requires to replace components already present in such onboard electrical charger OBC-10, resulting in substantial additional costs.
To overcome these disadvantages, the invention proposes to use an electrical charger capable of operating in two different modes, namely: a "direct mode", which corresponds to charging the high-voltage supply battery HV; and a "reverse mode" in which the electric charger performs the function of supplying charge using said high-voltage power supply battery HV.
Disclosure of Invention
More precisely, the invention relates to an electrical system, in particular for a motor vehicle, comprising an electrical charger configured to supply a supply battery, in particular configured to supply energy to drive the vehicle, the electrical charger comprising a power factor correction circuit comprising a first connection interface and a second connection interface, and a DC-DC converter comprising a first connection interface and a second connection interface.
For this purpose, the electrical charger of the electrical system is notable in that it is configured to have two modes of operation:
a "direct" operating mode, in which the external electrical supply network (external electrical supply network) supplies the battery through the intermediary of a power factor correction circuit (intermediate) whose second connection interface is connected to the first connection interface of the DC-DC converter, and the intermediary of the DC-DC converter, in which direct mode said second connection interface corresponds to the output interface of the power factor correction circuit,
an "inverse" mode of operation, in which the battery is charged (charged) through the intermediary of a power factor correction circuit,
the electrical system comprises a short-circuit circuit (short-circuit circuit) of the DC-DC converter, the short-circuit circuit comprising at least one switch which can directly connect the second connection interface of the DC-DC converter to the second connection interface of the power factor correction circuit, the second connection interface of the power factor correction circuit corresponding to the input interface of the power factor correction circuit in the reverse operation mode.
According to an aspect of the invention, an electrical charger of an electrical system comprises a pre-charge module (pre-charge module), a first connection interface of the pre-charge module being connected to a second connection interface of a power factor correction circuit through the intermediary of a switch and a second connection interface of the pre-charge module being connected to a second connection interface of a DC-DC converter, the pre-charge module being configured to charge a capacitor connected to the second interface of the power factor correction circuit using a battery connected to the second connection interface of the DC-DC converter in a reverse mode.
In one embodiment, an electrical charger of an electrical system includes a second pre-charge module, a first connection interface of the second pre-charge module is connected to a first connection interface of a power factor correction circuit through an intermediary of a switch, and a second connection interface of the second pre-charge module is connected to a second connection interface of the power factor correction circuit.
Advantageously, the electrical charger of the electrical system comprises a fuse (fuse).
Advantageously, the electrical charger of the electrical system comprises a second step-up DC-DC converter (step-up DC-DC converter) connected on the one hand to the second connection interface of the DC-DC converter and on the other hand to the second connection interface of the power factor correction circuit.
Advantageously, the power factor correction circuit of the electrical charger of the electrical system is bidirectional and the DC-DC converter is unidirectional from its first connection interface to its second connection interface.
The present invention relates to a method for providing charging using a battery, in particular for a motor vehicle, said method being implemented by an electrical system comprising an electrical charger as briefly described above. The method is remarkable in that it comprises the following operating steps:
-closing (closing) at least one switch connecting the second connection interface of the DC-DC converter and the second connection interface of the power factor correction circuit,
-converting the direct voltage from the battery via the power factor correction circuit through the intermediary of the second interface of the DC-DC converter, the intermediary of the at least one switch, the intermediary of the second connection interface into an alternating voltage adapted to supply a charge of the first connection interface connected to the power factor correction circuit,
-providing charging by means of an alternating voltage from a power factor correction circuit.
The invention also relates to a method for providing charging using a battery, in particular for a motor vehicle, said method being implemented by an electrical system comprising an electrical charger as briefly described above. The method is remarkable in that it comprises detecting the voltage at the charged interface and the voltage at the battery interface, and when the voltage at the charged interface is less than the voltage at the battery interface, performing the following steps:
-closing at least one switch connecting the second connection interface of the DC-DC converter with the second connection interface of the power factor correction circuit,
-converting the direct voltage from the battery via the power factor correction circuit through the intermediary of the second interface of the DC-DC converter, the intermediary of the at least one switch, the intermediary of the second connection interface into an alternating voltage adapted to provide charging of the first connection interface connected to the power factor correction circuit,
-providing charging by means of an alternating voltage from a power factor correction circuit.
The invention also relates to a method for providing charging using a battery, in particular for a motor vehicle, said method being implemented by an electrical system comprising an electrical charger and a second step-up DC-DC converter as briefly described above. The method is remarkable in that it comprises detecting the voltage at the charged interface and the voltage at the battery interface, and when the voltage at the charged interface is greater than the voltage at the battery interface, performing the following steps:
-converting the direct voltage from the battery via the second DC-DC converter to a higher voltage by intermediation of the second interface of the DC-DC converter, the higher voltage being delivered to the second interface of the power factor correction circuit,
-converting the direct voltage from the battery via the power factor correction circuit through the intermediary of the second interface of the DC-DC converter, the intermediary of the at least one switch, the intermediary of the second connection interface into an alternating voltage adapted to provide charging of the first connection interface connected to the power factor correction circuit,
-providing charging by means of an alternating voltage from a power factor correction circuit.
The invention also relates to an electric or hybrid motor vehicle comprising an electric system as briefly described above.
Drawings
The invention will be better understood from reading the following description, given by way of example only, and by reference to the accompanying drawings, given as a non-limiting example, in which like references are given to similar objects, and in which:
figure 1 (already discussed above) is a functional block diagram of an electrical system according to the state of the art.
Figure 2 shows a functional block diagram of an embodiment of the electrical system according to the invention.
Figure 3 is an electronic diagram of the embodiment of figure 2.
Figure 4 is an electronic diagram according to another embodiment of the invention.
It should be noted that the accompanying drawings disclose the invention in a practical manner for practicing the invention, which of course can be used to better define the invention when applicable.
Detailed Description
It should be noted that the invention is described below using various non-limiting embodiments, and that the invention can be implemented in alternative embodiments within the scope of a person skilled in the art to which the invention also relates.
Fig. 2 shows a functional block diagram of a first embodiment of an electrical charger OBC-1 of an electrical system according to the invention. This electrical charger OBC-1 is especially configured on an electric or hybrid motor vehicle. The electrical charger OBC-1 makes it possible to charge the high-voltage supply battery HV using an external electrical supply network G1, for example a household network, in a so-called "direct" mode or to supply the charge using said high-voltage supply battery HV in a so-called "reverse" mode.
Referring to fig. 2, according to the illustrated embodiment, the electrical charger OBC-1 comprises:
a bidirectional power factor correction circuit PFC comprising a first connection interface B1 and a second connection interface B2,
a DC-DC converter DC/DC comprising a first connection interface B3 and a second connection interface B4,
a precharge module PC2 and a second precharge module PC1, respectively comprising a first connection interface B7 and a first connection interface B5 and a second connection interface B8 and a second connection interface B6,
a high-voltage supply battery HV, comprising a connection interface B9,
a link capacitor Clink, located between the PFC and the DC/DC converter DC/DC, which suppresses the DC components while still allowing the transfer of the AC signal from one DC component to another,
three switches A, B and C,
a fuse F, in other words a circuit breaker protecting the electrical charger OBC-1.
The manner in which the various elements of the electrical charger OBC-1 are connected depends on the mode of operation used.
In the direct mode, switch a and switch B are open. All links between the components of the electrical charger OBC-1 are made with conductive wires. Therefore, the external electrical supply network G1 is connected to the first connection interface B1 of the power factor correction circuit PFC. The first connection interface B5 and the second connection interface B6 of the second precharge module PC1 are connected to the first connection interface B1 and to the second connection interface B2 of the power factor correction circuit PFC, respectively, through a switch C. Subsequently, the power factor correction circuit PFC is connected via its second connection interface B2 to the first connection interface B3 of the DC-DC converter DC/DC. Further, the link capacitor Clink is connected between the second connection interface B2 and the first connection interface B3. Finally, the second connection interface B4 of the DC-DC converter DC/DC is connected to the connection interface B9 of the high-voltage supply battery HV.
Still referring to fig. 2, most (mass) of the power factor correction circuit PFC and the DC-DC converter DC/DC are connected and may have an electrical reference common to the entire electrical charger OBC-1. The electrical charger OBC-1 preferably also comprises a fuse (in other words, a breaker) connected between the connection interface B9 of the high-voltage supply battery HV and the second output interface B8 of the pre-charge module PC2, said fuse F being able to open the electrical circuit in a branch of the circuit and avoid any deterioration of the electrical charger OBC-1. In the direct mode, the first connection interface B1 and the first connection interface B3 correspond to input interfaces and the second connection interface B2 and the second connection interface B4 correspond to output interfaces of the power factor correction circuit PFC.
Thus, in the direct operation mode of the electrical system and the direct operation mode of the electrical charger OBC-1, in the precharge step, the switch C is closed and thus the power factor correction circuit PFC is short-circuited, the second precharge module PC1 allows the voltage to be gradually increased so as to prevent the voltage at the interface of the link capacitor Clink from being excessively increased. At the completion of the pre-charging, the switch C is open, allowing the bidirectional power factor correction circuit PFC to deliver at its output either a positive dc voltage or a negative dc voltage using the ac voltage supplied by the external electrical supply network G1. The DC-DC converter DC/DC may then modify the direct voltage obtained at the output of the power factor correction circuit PFC in order to adapt it to the direct voltage required for charging the high-voltage supply battery HV. Therefore, the high-voltage power supply battery HV can be charged.
Still referring to fig. 2, in the reverse operation mode of the electrical charger OBC-1, the high-voltage power supply battery HV provides a function as a supply source of charge outside the vehicle. Such a charger consists, for example, of any piece of electrical equipment (in particular rechargeable), able to be powered by a supply battery HV. The supply voltage charged in the case of the invention is less than the voltage of the high-voltage supply battery HV.
First, in the reverse operation mode, a precharge step may be provided. Further, a switch D is provided for connecting the ground of the electrical charger OBC-1 therebetween. Therefore, during the precharge step, the switch a and the switch D are closed, and thus the DC-DC converter DC/DC is short-circuited. In other words, this pre-charging step can connect the connection interface B9 of the high-voltage supply battery HV to the second connection interface B8 of the pre-charging module PC2 and connect the first connection interface B7 of the pre-charging module PC2 to the second connection interface B2 of the power factor correction circuit PFC.
Thus, the precharge module PC2 is connected between the high voltage supply battery HV and the power factor correction circuit PFC, avoiding any inrush current in the link capacitor Clink and thus avoiding any degradation of the link capacitor Clink.
At the completion of the precharge step (if applicable), switch a is open and switch B is closed, and switch D remains continuously closed in the reverse mode of operation. Therefore, the DC-DC converter DC/DC and the pre-charge module PC2 are short-circuited and the connection interface B9 of the high-voltage supply battery HV is directly connected to the second connection interface B2 of the power factor correction circuit PFC. Further, a charge (charge) is connected to the first connection interface B1 of the power factor correction circuit PFC.
Thus, to provide said charging, the direct current supplied by the high-voltage supply battery HV is converted into an alternative voltage by the power factor correction circuit PFC.
Fig. 3 shows an embodiment of the electrical charger OBC-1 in detail. In this example, the AC/DC converter AC/DC of the power factor correction circuit PFC comprises an H-bridge (H bridge) comprising four bipolar transistors (bipolar transistors) acting as switches and four diodes. The DC-DC converter DC/DC, on the other hand, comprises a circuit LLC, which is known to a person skilled in the art and is therefore not described herein. Finally, the switches a, B, C, and D may be relays (relays), GTO Thyristors (GTO) that are gate turn off thyristors (GTO), silicon controlled rectifier thyristors or SCR thyristors, mosfets, insulated gate bipolar transistors called IGBT transistors, and the like.
According to an embodiment, in case the electrical charger OBC-1 is in reverse mode, if the voltage of the high voltage supply battery HV is less than the maximum amplitude of the charged supply voltage, the electrical charger OBC-1 comprises a second so-called "boost" DC-DC converter CE added to the electrical charger OBC-1 in order to ensure the correct operation of the electrical charger OBC-1 and to provide charging as desired. In other words, the electrical charger OBC-1 of the first embodiment does not operate in the reverse operation mode when the voltage of the high-voltage supply battery HV is low (i.e. less than 340 volts). To increase the voltage at the end of the high voltage supply battery HV, a second DC-DC converter CE is added to the electrical charger OBC-1.
Thus, in a second embodiment, referring to fig. 4, the electrical charger OBC-2 is similar to the electrical charger OBC-1, with the difference that the converter DC/DC additionally comprises a second DC-DC converter CE. The second DC-DC converter CE makes it possible to increase the voltage delivered to the charger.
Thus, referring to FIG. 4, another embodiment of the present invention is shown. The second DC-DC converter CE is separated from the DC-DC converter circuit and from the other components of the electrical charger OBC-1 shown in fig. 2. In this embodiment, the boosting circuit CE is connected on the one hand to the connection interface B9 of the high-voltage supply battery HV and on the other hand to the second connection interface B2 of the power factor correction circuit PFC.
It is stated that the invention is not limited to the examples described and that modifications can be made within the scope of the person skilled in the art.
Claims (9)
1. An electrical system, in particular for a motor vehicle, comprising:
-an electrical charger (OBC-1) and an electrical charger (OBC-2) configured to power a power supply battery (HV), -said electrical charger (OBC-1) and said electrical charger (OBC-2) comprising a power factor correction circuit (PFC) and a direct current to direct current converter (DC/DC), said power factor correction circuit comprising a first connection interface (B1) and a second connection interface (B2), -said direct current to direct current converter comprising a first connection interface (B3) and a second connection interface (B4), -said electrical charger (OBC-1) and said electrical charger (OBC-2) being configured to have two modes of operation:
a direct mode of operation in which an external electrical supply network (G1) powers the supply battery (HV) through the intermediary of the power factor correction circuit (PFC) and the intermediary of the DC-DC converter (DC/DC), the second connection interface (B2) of the power factor correction circuit (PFC) being connected to the first connection interface (B3) of the DC-DC converter (DC/DC), in direct mode the second connection interface (B2) corresponding to the output interface of the power factor correction circuit (PFC),
a reverse mode of operation, wherein the supply battery (HV) provides charging through the intermediary of the power factor correction circuit (PFC),
the electrical system comprises a short-circuit of the direct current to direct current converter (DC/DC), the short-circuit comprising at least one of a switch (B) and a switch (D) that can directly connect the second connection interface (B4) of the direct current to direct current converter (DC/DC) to the second connection interface (B2) of the power factor correction circuit (PFC), the second connection interface (B2) of the power factor correction circuit (PFC) corresponding to an input interface of the power factor correction circuit (PFC) in a reverse operation mode.
2. The electrical system of claim 1, wherein the electrical charger (OBC-1) and the electrical charger (OBC-2) comprise a pre-charge module (PC2), the first connection interface (B7) of the pre-charge module is connected to the second connection interface (B2) of the power factor correction circuit (PFC) through the intermediary of a switch (A), and a second connection interface (B8) of the precharge module is connected to the second connection interface (B4) of the direct current-to-direct current converter (DC/DC), in the reverse operation mode, the pre-charge module (PC2) is configured to charge a capacitor connected to the second connection interface (B2) of the power factor correction circuit (PFC) using the supply battery (HV) connected to the second connection interface (B4) of the direct current to direct current converter (DC/DC).
3. The electrical system according to claim 1 or 2, wherein the electrical charger (OBC-1) and the electrical charger (OBC-2) comprise a second boost DC-DC Converter (CE) connected on the one hand to the second connection interface (B4) of the DC-DC converter (DC/DC) and on the other hand to the second connection interface (B2) of the power factor correction circuit (PFC).
4. An electrical system as claimed in claim 1 or 2, wherein the power factor correction circuit (PFC) is bidirectional and the direct current to direct current converter (DC/DC) is unidirectional from its first connection interface (B3) to its second connection interface (B4).
5. Method for providing charging using a battery (HV), in particular for a motor vehicle, implemented by an electrical system according to any one of the preceding claims, comprising the steps of:
i. at least one of a switch (B) and a switch (D) connecting the second connection interface (B4) of the direct current-to-direct current converter (DC/DC) and the second connection interface (B2) of the power factor correction circuit (PFC) is closed,
-converting a direct voltage from the battery (HV) via the power factor correction circuit (PFC) through the intermediary of the second connection interface (B4) of the direct-current-to-direct-current converter (DC/DC), the intermediary of at least one of the switch (B) and the switch (D), the intermediary of the second connection interface (B2) into an alternating voltage adapted to provide the charging of a first connection interface (B1) connected to the power factor correction circuit (PFC),
providing the charging by the alternating voltage from the power factor correction circuit (PFC).
6. Method for providing charging using a battery (HV), in particular for a motor vehicle, the method being implemented by an electrical system according to any one of claims 1 to 4, the method for providing charging comprising detecting a voltage at an interface of the charging and a voltage at an interface of the battery (HV), and when the voltage at the interface of the charging is less than the voltage at the interface of the battery (HV), performing the following steps:
i. at least one of a switch (B) and a switch (D) connecting the second connection interface (B4) of the direct current-to-direct current converter (DC/DC) and the second connection interface (B2) of the power factor correction circuit (PFC) is closed,
-converting a direct voltage from the battery (HV) via the power factor correction circuit (PFC) through the intermediary of the second connection interface (B4) of the direct-current-to-direct-current converter (DC/DC), the intermediary of at least one of the switch (B) and the switch (D), the intermediary of the second connection interface (B2) into an alternating voltage adapted to provide the charging of a first connection interface (B1) connected to the power factor correction circuit (PFC),
providing the charging by the alternating voltage from the power factor correction circuit (PFC).
7. Method for providing charging using a battery (HV) according to claim 6, implemented by an electrical system according to claim 3, comprising detecting the voltage at the interface of the charging and the voltage at the interface of the battery (HV), and when the voltage at the interface of the charging is greater than the voltage at the interface of the battery (HV), performing the following steps:
i. -converting the direct voltage from the battery (HV) via the second step-up DC-to-DC Converter (CE) through the intermediary of the second interface (B4) of the DC-to-DC converter (DC/DC) into a higher voltage, said higher voltage being delivered to the second interface (B2) of the power factor correction circuit (PFC),
-converting a direct voltage from the battery (HV) via the power factor correction circuit (PFC) through the intermediary of the second interface (B4) of the direct current to direct current converter (DC/DC), the intermediary of at least one of the switch (B) and the switch (D), the intermediary of the second connection interface (B2) into an alternating voltage adapted to provide the charging of the first connection interface (B1) connected to the power factor correction circuit (PFC),
providing the charging by the alternating voltage from the power factor correction circuit (PFC).
8. An electric motor vehicle comprising an electrical system according to any one of claims 1 to 4.
9. A hybrid motor vehicle comprising an electrical system according to any one of claims 1 to 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1856020 | 2018-06-29 | ||
| FR1856020A FR3083382B1 (en) | 2018-06-29 | 2018-06-29 | ELECTRICAL SYSTEM AND METHOD FOR CHARGING A BATTERY, ESPECIALLY FOR VEHICLES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110723006A true CN110723006A (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910568171.7A Pending CN110723006A (en) | 2018-06-29 | 2019-06-27 | Electrical system, method for providing charging by battery, electric and hybrid motor vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110723006A (en) |
| FR (1) | FR3083382B1 (en) |
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| FR3131143A1 (en) * | 2021-12-21 | 2023-06-23 | Vitesco Technologies | Electrical circuit for vehicle |
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Also Published As
| Publication number | Publication date |
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| FR3083382A1 (en) | 2020-01-03 |
| FR3083382B1 (en) | 2021-05-21 |
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