Charging system and charging method of new energy vehicle and new energy vehicle

Abstract

The embodiment of the invention discloses a charging system and a charging method of a new energy carrier, and the new energy carrier, and relates to the technical field of new energy. The charging system comprises a charging port seat panel, a battery management unit and a battery pack. The charging port seat panel is integrated with a charging socket body and a charging communication protocol conversion unit. An output port of the charging socket body is connected with an input port of the charging communication protocol conversion unit, an output port of the charging communication protocol conversion unit is connected with an input port of the battery management unit, and an output port of the battery management unit is connected with the battery pack; the charging socket body is used for sending an international charging signal transmitted by a pin to the charging communication protocol conversion unit under the condition that the charging socket body is connected with international charging equipment through the pin; the charging communication protocol conversion unit is used for converting the international charging signal into a domestic charging signal and sending the domestic charging signal to the battery management unit; the battery management unit is used for charging the battery pack based on the domestic charging signal.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of new energy vehicles, and in particular to a charging system and a charging method for a new energy vehicle and a new energy vehicle. Background Art

[0002] The electric vehicle charging communication protocol conversion unit (Electric Vehicle Communication Controller, EVCC) is used as a communication translation component to achieve the purpose of compatible charging in different countries.

[0003] During the development of a vehicle, not only does it need to reserve a special space to arrange the EVCC, but sometimes the vehicle structure needs to be modified. For example, in the related art, the interior of the charging station may be modified and the EVCC may be arranged inside the charging station.

[0004] However, the above-mentioned arrangement of EVCC has some disadvantages. Since the charging station itself has already integrated a large number of electronic components and is in a highly integrated state, the internal structure modification of the charging station undoubtedly increases the complexity and cost of development and has a long development cycle. Summary of the invention

[0005] The embodiment of the present application provides a charging system, a charging method and a new energy vehicle. The technical solution is as follows:

[0006] On the one hand, an embodiment of the present application provides a charging system for a new energy vehicle, the charging system comprising a charging port panel, a battery management unit and a battery pack, the charging port panel integrating a charging socket body and a charging communication protocol conversion unit;

[0007] The output port of the charging socket body is connected to the input port of the charging communication protocol conversion unit, the output port of the charging communication protocol conversion unit is connected to the input port of the battery management unit, and the output port of the battery management unit is connected to the battery pack;

[0008] The charging socket body is used to send the international charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international charging device through the pin, and the international charging signal adopts the format indicated by the international charging communication protocol;

[0009] The charging communication protocol conversion unit is used to convert the international charging signal into a domestic charging signal, the domestic charging signal adopts a format indicated by a domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol; and send the domestic charging signal to the battery management unit;

[0010] The battery management unit is used to charge the battery pack based on the domestic charging signal.

[0011] On the other hand, an embodiment of the present application provides a charging method for a new energy vehicle, the method being used in a charging system, the charging system comprising a charging port panel, a battery management unit and a battery pack, the charging port panel integrating a charging socket body and a charging communication protocol conversion unit;

[0012] The output port of the charging socket body is connected to the input port of the charging communication protocol conversion unit, the output port of the charging communication protocol conversion unit is connected to the input port of the battery management unit, and the output port of the battery management unit is connected to the battery pack;

[0013] The method comprises:

[0014] Through the charging socket body, when the input port is engaged with the international charging device through the pins, the international charging signal transmitted by the pins is sent to the charging communication protocol conversion unit, and the international charging signal adopts the format indicated by the international charging communication protocol;

[0015] converting the international charging signal into a domestic charging signal by the charging communication protocol conversion unit, wherein the domestic charging signal adopts a format indicated by a domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol; and sending the domestic charging signal to the battery management unit;

[0016] The battery pack is charged based on the domestic charging signal through the battery management unit.

[0017] On the other hand, an embodiment of the present application provides a new energy vehicle, which is provided with a charging system as described in any of the above embodiments.

[0018] In the embodiment of the present application, since the charging communication protocol conversion unit and the charging socket body are integrated on the charging port panel, rather than integrating the charging communication protocol conversion unit inside the charging socket body, considering that new panels will be required for new models both internationally and domestically, on the one hand, development costs are saved and development cycles are shortened; on the other hand, the layout of the entire charging system is made more compact and reasonable, the complexity of wiring inside the system is reduced, and the probability of failure is reduced. The charging system for new energy vehicles proposed in this application provides a strong guarantee for convenient charging of new energy vehicles around the world. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic diagram of a charging system for a new energy vehicle provided by an exemplary embodiment of the present application;

[0021] Figure 2 is a schematic diagram of a charging port panel provided by an exemplary embodiment of the present application;

[0022] Figure 3 is a schematic diagram of DC charging and AC charging provided by an exemplary embodiment of the present application;

[0023] Figure 4 is a schematic diagram of charging completion provided by an exemplary embodiment of the present application;

[0024] Figure 5 It is a flow chart of a charging method for a new energy vehicle provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0026] New energy vehicles exported abroad need to reserve special space to arrange EVCC to be compatible with charging equipment in different countries. In related technologies, since the charging station itself has already integrated a large number of electronic components and is in a highly integrated state, the development cost of arranging EVCC inside the charging station is high and the development cycle is long.

[0027] Therefore, the present application provides a charging system for a new energy vehicle, which integrates a charging socket body and an EVCC through a charging port panel, thereby reducing the integration cost of the EVCC and shortening the development cycle.

[0028] See also Figure 1 , Figure 1 It is a schematic diagram of a charging system for a new energy vehicle provided by an exemplary embodiment of the present application.

[0029] Optionally, new energy vehicles include electric vehicles or hybrid vehicles.

[0030] In some embodiments, the charging system includes a charging port panel 110 , a battery management unit 120 , and a battery pack 130 .

[0031] The charging port panel 110 is integrated with a charging socket body 111 and a charging communication protocol conversion unit 112 .

[0032] In some embodiments, the output port of the charging socket body 111 is connected to the input port of the charging communication protocol conversion unit 112, the output port of the charging communication protocol conversion unit 112 is connected to the input port of the battery management unit 120, and the output port of the battery management unit 120 is connected to the battery pack 130.

[0033] Optionally, the output port of the charging socket body 111 is connected to the input port of the charging communication protocol conversion unit 112 through a specially designed adapter line, which has good signal transmission stability and can effectively resist external electromagnetic interference, ensuring that the international charging signal will not be distorted or lost during the transmission process. Optionally, the output port of the charging communication protocol conversion unit 112 is connected to the input port of the battery management unit 120 using a high-speed data transmission interface to ensure that the converted domestic charging signal can be quickly and accurately transmitted to the battery management unit 120. Optionally, the output port of the battery management unit 120 is connected to the battery pack 130 through a high-current-carrying cable to meet the battery pack 130's demand for large current during charging.

[0034] In some embodiments, the charging socket body is used to send the international charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international charging device through the pin, and the international charging signal adopts the format indicated by the international charging communication protocol.

[0035] Optionally, the international charging equipment may be a charging pile, a charging gun or any possible new energy vehicle charging equipment that adopts international standards (such as European standards, American standards or Japanese standards).

[0036] Optionally, international charging communication protocols include, for example, DIN70121 protocol, ISO15118 protocol, IEC61851-1 protocol and CHAdeMO protocol.

[0037] In some embodiments, the charging communication protocol conversion unit (Electric Vehicle Communication Controller, EVCC) is used to convert the international charging signal into a domestic charging signal, and send the domestic charging signal to the battery management unit.

[0038] Among them, the domestic charging signal adopts the format indicated by the domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol.

[0039] Optionally, the domestic charging communication protocol is the GB / T 27930 protocol.

[0040] Optionally, when an international charging device is connected to the charging socket body 111, the international charging signal transmitted by its pin is transmitted to the charging communication protocol conversion unit 112 through the internal circuit structure of the charging socket body 111 in the coding method indicated by the international charging communication protocol. The charging communication protocol conversion unit 112 contains a signal analysis and conversion circuit, as well as an algorithm program based on a dedicated chip. The program first decodes the international charging signal and identifies various charging parameters therein, such as voltage, current, charging mode and other information. Then, according to the domestic charging communication protocol rules pre-stored in the chip, these parameters are re-encoded to generate a domestic charging signal that conforms to the format indicated by the domestic charging communication protocol.

[0041] Optionally, the international charging signal is a power line communication signal (Power Line Communication, PLC), and the domestic charging signal is a controller area network signal (Controller Area Network, CAN).

[0042] In some embodiments, a battery management system (BMS) is used to charge the battery pack based on the domestic charging signal.

[0043] Optionally, after receiving the domestic charging signal, the battery management unit 120 will perform a secondary check on the charging parameters in the signal to ensure its accuracy and safety. After the check is passed, the battery management unit 120 will control the internal power regulation circuit according to the charging parameters and adjust the charging voltage and current output to the battery pack 130. During the charging process, the battery management unit 120 will monitor the various status parameters of the battery pack 130 in real time, including the battery terminal voltage, charging current, battery temperature, etc. Once it is detected that the status parameters of the battery pack 130 exceed the preset safety range, the battery management unit 120 will immediately take corresponding protection measures, such as reducing the charging current, stopping charging, etc., to prevent the battery pack 130 from overcharging, overheating and other safety problems.

[0044] In summary, since the charging communication protocol conversion unit 112 and the charging socket body 111 are integrated on the charging port panel 110, rather than integrating the charging communication protocol conversion unit 112 inside the charging socket body 111, considering that new panels will be required for new models both internationally and domestically, on the one hand, it saves development costs and shortens the development cycle; on the other hand, it makes the layout of the entire charging system more compact and reasonable, reduces the complexity of wiring inside the system, and reduces the probability of failure. The charging system for new energy vehicles proposed in this application provides a strong guarantee for the convenient charging of new energy vehicles around the world.

[0045] In some embodiments, the charging socket body includes a DC charging socket body and an AC charging socket body.

[0046] Among them, the DC charging socket body is adapted to international DC charging equipment, and the AC charging socket body is adapted to international AC charging equipment.

[0047] In some embodiments, the DC charging socket body is used to send the international DC charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international DC charging device through the pin.

[0048] In some embodiments, the AC charging socket body is used to send the international AC charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international AC charging device through the pin.

[0049] See also Figure 2 , Figure 2 It is a schematic diagram of a charging port panel provided by an exemplary embodiment of the present application.

[0050] like Figure 2 As shown, the charging port panel 210 integrates a DC charging socket body 211 , an AC charging socket body 212 and a charging communication protocol conversion unit 213 .

[0051] In some embodiments, the charging communication protocol conversion unit is used to convert an international DC charging signal into a domestic DC charging signal, or to convert an international AC charging signal into a domestic AC charging signal.

[0052] For example, the charging communication protocol conversion unit 213 converts the international DC charging signal transmitted by the DC charging socket body 211 into a domestic DC charging signal, or converts the international AC charging signal transmitted by the AC charging socket body 211 into a domestic AC charging signal.

[0053] See also Figure 3 , Figure 3 It is a schematic diagram of DC charging and AC charging provided by an exemplary embodiment of the present application.

[0054] The charging port panel 310 integrates a DC charging socket body 311 , an AC charging socket body 312 and a charging protocol conversion unit 313 .

[0055] In the DC charging scenario, the DC charging socket body 311 is used to send the international DC charging signal transmitted by the pin to the charging communication protocol conversion unit 313 when the input port is connected to the international DC charging device through the pin. The charging communication protocol conversion unit 313 is used to send the domestic DC charging signal to the battery management unit 330.

[0056] Regarding the specific manner in which the charging communication protocol conversion unit sends the domestic DC charging signal to the battery management unit, in some embodiments, the charging system also includes a high-voltage power distribution unit (PDU).

[0057] Among them, the output port of the charging communication protocol conversion unit is connected to the input port of the high-voltage distribution box, and the output port of the high-voltage distribution box is connected to the input port of the battery management unit.

[0058] In some embodiments, the charging communication protocol conversion unit 313 is used to send the domestic DC charging signal to the high-voltage distribution box 320 .

[0059] In some embodiments, the high voltage distribution box 320 is used to send the domestic DC charging signal to the battery management unit 330 .

[0060] In some embodiments, the battery management unit 330 is used to enable the DC charging permission of the DC charging socket body when the charging conditions are met, and charge the battery pack 340 based on the domestic DC charging signal.

[0061] Among them, the charging condition includes at least one of the power condition of the battery pack, the voltage condition and the current condition of the domestic DC charging signal.

[0062] For example only, the charging conditions include that the power of the battery pack is less than 99%, the voltage of the domestic DC charging signal is within a preset voltage range, and the current of the domestic DC charging signal is within a preset current range.

[0063] In the AC charging scenario, the AC charging socket body 312 is used to send the international AC charging signal transmitted by the pin to the charging communication protocol conversion unit 313 when the input port is engaged with the international AC charging device through the pin.

[0064] In some embodiments, the charging system further includes an on-board charger (OBC).

[0065] The output port of the charging communication protocol conversion unit is connected to the input port of the on-board charger unit, and the output port of the on-board charger unit is connected to the input port of the battery management unit.

[0066] In some embodiments, the charging communication protocol conversion unit 313 is used to send the domestic AC charging signal to the on-board charger unit 321 .

[0067] Optionally, the on-board charger unit is located in the high-voltage distribution box. For example, the charging communication protocol conversion unit 313 is used to send the domestic AC charging signal to the on-board charger unit 321 in the high-voltage distribution box 320.

[0068] In some embodiments, the onboard charger unit 321 is used to convert the domestic AC charging signal into a domestic DC charging signal; and send a charging request to the battery management unit 330 .

[0069] In some embodiments, the battery management unit 330 is configured to send a request response to the onboard charger unit 321 .

[0070] The request reply instructs the on-board charger unit to enable the AC charging authority of the AC charging socket body when the charging conditions are met.

[0071] Among them, the charging condition includes at least one of the power condition of the battery pack, the voltage condition and the current condition of the domestic DC charging signal.

[0072] For example only, the charging conditions include that the power of the battery pack is less than 99%, the voltage of the domestic DC charging signal is within a preset voltage range, and the current of the domestic DC charging signal is within a preset current range.

[0073] In some embodiments, the battery management unit 330 is used to charge the battery pack 340 based on the domestic DC charging signal converted by the onboard charger unit 321 .

[0074] The charging system for new energy vehicles proposed in this embodiment can provide strong guarantees for convenient charging of new energy vehicles around the world in both DC charging and AC charging scenarios.

[0075] The following describes the scenario where charging is completed.

[0076] See also Figure 4 , Figure 4 It is a schematic diagram of charging completion provided by an exemplary embodiment of the present application.

[0077] The charging port panel 410 integrates a DC charging socket body 411 , an AC charging socket body 412 and a charging communication protocol conversion unit 413 .

[0078] In some embodiments, the battery management unit 430 is used to send a domestic charging end instruction to the charging communication protocol conversion unit 413 when it is detected that the battery pack 440 is in a fully charged state. The domestic charging end instruction adopts the format indicated by the domestic charging communication protocol.

[0079] In some embodiments, the charging communication protocol conversion unit 413 is used to convert the domestic charging end instruction into an international charging end instruction, the international charging end instruction adopts the format indicated by the international charging communication protocol; and send the international charging end instruction to the charging socket body.

[0080] For example, when DC charging is finished, the charging communication protocol conversion unit 413 is used to send the international DC charging end instruction to the DC charging socket body 411. When AC charging is finished, the charging communication protocol conversion unit 413 is used to send the international AC charging end instruction to the AC charging socket body 412.

[0081] In some embodiments, the charging socket body is used to send an international charging end instruction to the international charging device through a pin to instruct the international charging device to end charging.

[0082] For example, when DC charging is finished, the DC charging socket body 411 sends an international DC charging end instruction to the international DC charging device through the pins to instruct the international DC charging device to end DC charging. When AC charging is finished, the AC charging socket body 412 sends an international AC charging end instruction to the international AC charging device through the pins to instruct the international AC charging device to end AC charging.

[0083] In one possible scenario, the new energy vehicle can determine whether the EVCC has a built-in available charging communication protocol in combination with the vehicle's positioning. If the EVCC does not have a built-in charging communication protocol, the charging communication protocol required for the positioning can be obtained in advance and written.

[0084] In a possible implementation, the charging communication protocol conversion unit has a built-in communication protocol mapping table.

[0085] Among them, the communication protocol mapping table is used to characterize the correspondence between the positioning of the new energy vehicle and the charging communication protocol.

[0086] For example only, when the new energy vehicle is located in country A, the communication protocol mapping table corresponds to charging communication protocol a, where charging communication protocol a is a charging communication protocol applicable to country A.

[0087] In some embodiments, the new energy vehicle further includes a vehicle positioning unit and a network communication unit.

[0088] Among them, the vehicle positioning unit is used to obtain the real-time positioning of new energy vehicles, and the network communication unit is used to realize the communication between various modules and servers in new energy vehicles through the network. Optionally, the vehicle positioning unit equipped with new energy vehicles adopts advanced positioning technologies such as high-precision global positioning system (GPS) and Beidou satellite navigation system, which can obtain the geographical location information of new energy vehicles in real time and accurately, including longitude and latitude, altitude and other data, so as to determine the real-time positioning of new energy vehicles. The network communication unit supports a variety of network communication modes, such as 4G, 5G cellular networks and Wi-Fi, etc. Through these network communication technologies, data interaction between various modules in new energy vehicles, including charging socket body, charging communication protocol conversion unit, OBC, PDU and vehicle control system, is realized, and a stable communication link between new energy vehicles and remote servers is also established to ensure that the vehicle can receive instructions and data updates from the server in a timely manner, as well as upload its own operating status information.

[0089] In some embodiments, the charging communication protocol conversion unit is used to determine the real-time charging communication protocol corresponding to the real-time positioning from the communication protocol mapping table based on the real-time positioning of the new energy vehicle sent by the vehicle positioning unit.

[0090] In some embodiments, the charging protocol communication protocol conversion unit is used to send a communication protocol writing request to the network communication unit when the real-time charging communication protocol has not been written.

[0091] The communication protocol write request includes a protocol identifier corresponding to the real-time communication protocol. Optionally, the protocol identifier can accurately indicate the specific type and version information of the charging communication protocol that the server needs to provide.

[0092] After receiving the communication protocol write request, the network communication unit will send the request to the server through the network. After receiving the communication protocol write request, the server will search its own database according to the protocol identifier, find the corresponding charging communication protocol data, and package it into communication protocol write data, and return it to the network communication unit of the new energy vehicle through the network.

[0093] In some embodiments, the charging protocol communication protocol conversion unit is used to write data based on the communication protocol returned by the network communication unit, and write the real-time charging communication protocol.

[0094] Optionally, after receiving the communication protocol write data returned by the network communication unit, the charging communication protocol conversion unit will write the real-time charging communication protocol into its own storage module according to a specific writing process. In this way, the charging communication protocol conversion unit can efficiently and accurately convert the international charging signal according to the newly written real-time charging communication protocol during the subsequent charging process, ensuring that new energy vehicles can successfully complete charging operations in different regions.

[0095] See also Figure 5 , Figure 5 It is a flow chart of a charging method for a new energy vehicle provided by an exemplary embodiment of the present application.

[0096] In some embodiments, the method is used in a charging system, the charging system includes a charging port panel, a battery management unit and a battery pack, the charging port panel is integrated with a charging socket body and a charging communication protocol conversion unit, wherein the output port of the charging socket body is connected to the input port of the charging communication protocol conversion unit, the output port of the charging communication protocol conversion unit is connected to the input port of the battery management unit, and the output port of the battery management unit is connected to the battery pack.

[0097] For more information about the charging system, please refer to the above embodiments and related descriptions, which will not be repeated here.

[0098] The charging method of the new energy vehicle includes the following steps.

[0099] Step 501, through the charging socket body, when the input port is engaged with the international charging device through the pins, the international charging signal transmitted by the pins is sent to the charging communication protocol conversion unit, and the international charging signal adopts the format indicated by the international charging communication protocol.

[0100] Optionally, the international charging equipment may be a charging pile, a charging gun or any possible new energy vehicle charging equipment that adopts international standards (such as European standards, American standards or Japanese standards).

[0101] Optionally, international charging communication protocols include, for example, DIN70121 protocol, ISO15118 protocol, IEC61851-1 protocol and CHAdeMO protocol.

[0102] Step 502, converting the international charging signal into a domestic charging signal through a charging communication protocol conversion unit, wherein the domestic charging signal adopts a format indicated by a domestic charging communication protocol, which is different from the international charging communication protocol; and sending the domestic charging signal to a battery management unit.

[0103] In some embodiments, the charging communication protocol conversion unit (Electric Vehicle Communication Controller, EVCC) is used to convert the international charging signal into a domestic charging signal, and send the domestic charging signal to the battery management unit.

[0104] Among them, the domestic charging signal adopts the format indicated by the domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol.

[0105] Optionally, the domestic charging communication protocol is the GB / T 27930 protocol.

[0106] Optionally, when an international charging device is connected to the charging socket body, the international charging signal transmitted by its pin is transmitted to the charging communication protocol conversion unit through the internal circuit structure of the charging socket body in the coding method indicated by the international charging communication protocol. The charging communication protocol conversion unit contains a signal analysis and conversion circuit, as well as an algorithm program based on a dedicated chip. The program first decodes the international charging signal and identifies various charging parameters therein, such as voltage, current, charging mode and other information. Then, according to the domestic charging communication protocol rules pre-stored in the chip, these parameters are re-encoded to generate a domestic charging signal that conforms to the format indicated by the domestic charging communication protocol.

[0107] Optionally, the international charging signal is a power line communication signal (Power Line Communication, PLC), and the domestic charging signal is a controller area network signal (Controller Area Network, CAN).

[0108] Step 503, charging the battery pack based on the domestic charging signal through the battery management unit.

[0109] Optionally, after receiving the domestic charging signal, the battery management unit will perform a secondary check on the charging parameters in the signal to ensure its accuracy and safety. After the check is passed, the battery management unit will control the internal power regulation circuit according to the charging parameters and adjust the charging voltage and current output to the battery pack. During the charging process, the battery management unit will monitor the various status parameters of the battery pack in real time, including the battery terminal voltage, charging current, battery temperature, etc. Once it is detected that the status parameters of the battery pack exceed the preset safety range, the battery management unit will immediately take corresponding protection measures, such as reducing the charging current, stopping charging, etc., to prevent the battery pack from overcharging, overheating and other safety problems.

[0110] In summary, since the charging communication protocol conversion unit and the charging socket body are integrated on the charging port panel, rather than integrating the charging communication protocol conversion unit inside the charging socket body, considering that new panels will be required for new models both internationally and domestically, on the one hand, it saves development costs and shortens the development cycle; on the other hand, it makes the layout of the entire charging system more compact and reasonable, reduces the complexity of wiring inside the system, and reduces the probability of failure. The charging system for new energy vehicles proposed in this application provides a strong guarantee for the convenient charging of new energy vehicles around the world.

[0111] An embodiment of the present application also provides a new energy vehicle, which is provided with a charging system for the new energy vehicle provided in any of the above embodiments.

[0112] Optionally, new energy vehicles include electric vehicles or hybrid vehicles.

[0113] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A charging system for a new energy vehicle, characterized in that: The charging system comprises a charging port panel, a battery management unit and a battery pack, wherein the charging port panel is integrated with a charging socket body and a charging communication protocol conversion unit; The output port of the charging socket body is connected to the input port of the charging communication protocol conversion unit, the output port of the charging communication protocol conversion unit is connected to the input port of the battery management unit, and the output port of the battery management unit is connected to the battery pack; The charging socket body is used to send the international charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international charging device through the pin, and the international charging signal adopts the format indicated by the international charging communication protocol; The charging communication protocol conversion unit is used to convert the international charging signal into a domestic charging signal, the domestic charging signal adopts a format indicated by a domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol; and send the domestic charging signal to the battery management unit; The battery management unit is used to charge the battery pack based on the domestic charging signal.

2. The charging system according to claim 1, characterized in that: The charging socket body includes a DC charging socket body and an AC charging socket body; The DC charging socket body is used to send the international DC charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international DC charging device through the pin; The AC charging socket body is used to send the international AC charging signal transmitted by the pin to the charging communication protocol conversion unit when the input port is engaged with the international AC charging device through the pin; The charging communication protocol conversion unit is used to convert the international DC charging signal into a domestic DC charging signal, or to convert the international AC charging signal into a domestic AC charging signal.

3. The charging system according to claim 2, characterized in that: The charging communication protocol conversion unit is used to send the domestic DC charging signal to the battery management unit; The battery management unit is used to enable the DC charging permission of the DC charging socket body when the charging conditions are met, and charge the battery pack based on the domestic DC charging signal. The charging conditions include at least one of the power condition of the battery pack and the voltage condition and current condition of the domestic DC charging signal.

4. The charging system according to claim 3, characterized in that: The charging system further comprises an on-board charger unit; the output port of the charging communication protocol conversion unit is connected to the input port of the on-board charger unit, and the output port of the on-board charger unit is connected to the input port of the battery management unit; The charging communication protocol conversion unit is used to send the domestic AC charging signal to the on-board charger unit; The on-board charger unit is used to convert the domestic AC charging signal into a domestic DC charging signal; and send a charging request to the battery management unit; The battery management unit is used to send a request reply to the on-board charger unit, wherein the request reply instructs the on-board charger unit to enable the AC charging permission of the AC charging socket body when the charging condition is met; The battery management unit is used to charge the battery pack based on the domestic DC charging signal converted by the on-board charger unit.

5. The charging system according to claim 4, characterized in that: The charging system further includes a high-voltage distribution box, in which the on-board charger unit is located; the output port of the charging communication protocol conversion unit is connected to the input port of the high-voltage distribution box, and the output port of the high-voltage distribution box is connected to the input port of the battery management unit; The charging communication protocol conversion unit is used to send the domestic DC charging signal to the high-voltage distribution box; The high-voltage distribution box is used to send the domestic DC charging signal to the battery management unit; The charging communication protocol conversion unit is used to send the domestic AC charging signal to the on-board charger unit in the high-voltage distribution box.

6. The charging system according to any one of claims 1 to 5, characterized in that: The battery management unit is used to send a domestic charging end instruction to the charging communication protocol conversion unit when detecting that the battery pack is in a fully charged state, wherein the domestic charging end instruction adopts a format indicated by the domestic charging communication protocol; The charging communication protocol conversion unit is used to convert the domestic charging end instruction into an international charging end instruction, wherein the international charging end instruction adopts the format indicated by the international charging communication protocol; and send the international charging end instruction to the charging socket body; The charging socket body is used to send the international charging end instruction to the international charging device through a pin to instruct the international charging device to end charging.

7. The charging system according to any one of claims 1 to 5, characterized in that: The charging communication protocol conversion unit has a built-in communication protocol mapping table, and the communication protocol mapping table is used to characterize the corresponding relationship between the positioning of the new energy vehicle and the charging communication protocol; The charging communication protocol conversion unit is used to determine the real-time charging communication protocol corresponding to the real-time positioning from the communication protocol mapping table based on the real-time positioning of the new energy vehicle sent by the vehicle positioning unit; The charging protocol communication protocol conversion unit is used to send a communication protocol write request to the network communication unit when the real-time charging communication protocol is not written, and the communication protocol write request includes a protocol identifier corresponding to the real-time communication protocol; The charging protocol communication protocol conversion unit is used to write the real-time charging communication protocol based on the communication protocol writing data returned by the network communication unit.

8. The charging system according to any one of claims 1 to 5, characterized in that: The international charging signal is a power line communication (PLC) signal, and the domestic charging signal is a controller area network (CAN) signal.

9. A charging method for a new energy vehicle, characterized in that: The method is used for a charging system, which includes a charging port panel, a battery management unit and a battery pack, wherein the charging port panel is integrated with a charging socket body and a charging communication protocol conversion unit; The output port of the charging socket body is connected to the input port of the charging communication protocol conversion unit, the output port of the charging communication protocol conversion unit is connected to the input port of the battery management unit, and the output port of the battery management unit is connected to the battery pack; The method comprises: Through the charging socket body, when the input port is engaged with the international charging device through the pins, the international charging signal transmitted by the pins is sent to the charging communication protocol conversion unit, and the international charging signal adopts the format indicated by the international charging communication protocol; converting the international charging signal into a domestic charging signal by the charging communication protocol conversion unit, wherein the domestic charging signal adopts a format indicated by a domestic charging communication protocol, and the domestic charging communication protocol is different from the international charging communication protocol; and sending the domestic charging signal to the battery management unit; The battery pack is charged based on the domestic charging signal through the battery management unit.

10. A new energy vehicle, characterized in that: The new energy vehicle is provided with a charging system as described in any one of claims 1 to 8.

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