WO2020034452A1

WO2020034452A1 - Electric vehicle charging control method and charging control device, and electric vehicle

Info

Publication number: WO2020034452A1
Application number: PCT/CN2018/114404
Authority: WO
Inventors: 王克坚; 马强
Original assignee: 北京长城华冠汽车科技股份有限公司
Priority date: 2018-08-13
Filing date: 2018-11-07
Publication date: 2020-02-20
Also published as: CN109278571A

Abstract

An electric vehicle charging control method and charging control device, and an electric vehicle. After a battery management system detects a charging gun signal, if it is detected that the charging gun signal is abnormally disconnected, said system sends a charging gun signal disconnection message to a vehicle controller; the vehicle controller receives the charging gun signal disconnection message and sends a shutdown instruction to a DC/DC converter and when the DC/DC converter stops working on the basis of the shutdown instruction, sends a DC/DC converter shutdown report message to the battery management system; and upon receiving the DC/DC converter shutdown report message, the battery management system disconnects a main positive relay and a main negative relay of a battery. After charging is completed, it can be ensured that the vehicle starts and runs normally, and the problem of power loss of a lead-acid battery is solved.

Description

Charging control method for electric vehicle, charging control device and electric vehicle

Cross-reference to related applications

This application requires that China Great Wall Huaguan Automobile Technology Co., Ltd., filed on August 13, 2018, and whose application name is "A Charging Control Method, Charging Control Device and Electric Vehicle for Electric Vehicles", Chinese Patent Application No. "201810913982.1 "Priority.

Technical field

The present application relates to the field of automotive technology, and more particularly, to a charging control method for an electric vehicle, a charging control device, and an electric vehicle.

Background technique

The shortage of energy, the oil crisis and environmental pollution have intensified, which has brought huge impacts on people's lives and is directly related to the sustainable development of the country's economy and society. Countries around the world are actively developing new energy technologies. As a new energy vehicle that reduces oil consumption, low pollution and low noise, electric vehicles are considered as an important way to solve the energy crisis and environmental degradation. Hybrid electric vehicles take into account both the advantages of pure electric vehicles and traditional internal combustion engines. Under the premise of meeting the requirements of vehicle power performance and driving range, it effectively improves fuel economy and reduces emissions. It is considered to be the current energy saving and emission reduction. One of the valid paths.

The charging pile is similar to the gas dispenser in the gas station. It can be fixed on the ground or wall, installed in public buildings (public buildings, shopping malls, public parking lots, etc.) and residential district parking lots or charging stations. Various models of electric vehicles are charged. The input end of the charging pile is directly connected to the AC power grid, and the output end is equipped with a charging plug for charging the electric vehicle. Charging piles generally provide two kinds of charging methods: regular charging and fast charging. People can use specific charging cards to swipe the card on the human-computer interactive operation interface provided by the charging pile, and perform corresponding charging methods, charging time, and cost data printing. The charging pile display shows data such as charging amount, cost, and charging time. Charging piles are divided into two types: fast charging and slow charging. In general, the charging time of fast charging piles is between 20 minutes and 60 minutes; charging of slow charging piles The time is between 6 hours and 8 hours. The speed of charging depends mainly on the power of the charging pile.

Recharging is the same as refueling. It looks like it consists of a series of simple actions: pull the gun-insert the gun-swipe the card-charge-end of charging-then pull the gun-hang the gun. The details of these actions are in “GB / T 18487.1-2015: Electric Vehicle Conductive Charging System Part 1: General Requirements” Appendix B and “GB / T 27930-2015: Electric Vehicle Non-vehicle Conductive Charger and Battery Management System The communication protocols in Appendix A have standardized process requirements.

When the vehicle is plugged into the charging gun, the battery management system (BMS) engages the battery's main positive relay and main negative relay. When the charging fails to start, if the operator pulls out the charging gun without swiping the card, the BMS and the charger are communicating at this time. The BMS considers the safety factor to disconnect the battery's main positive relay and main negative relay. At this time, the DC / DC converter detects that the input DC voltage is lower than a predetermined value (such as 163V), then the DC / DC converter enters fault processing, reports a hardware protection fault of the input undervoltage, and closes the DC / DC conversion. Low voltage 12V output. Then, the operator reinserts the charging gun, swipes the card again, and starts charging. After the charging is completed, the vehicle is started for driving experiments. During this process, the DC / DC converter is always in a fault state, and the DC / DC low voltage 12V output is turned off. The vehicle needs to use a 12V battery for power supply, causing the 12V battery to lose power. In addition, the low-voltage power supply voltage of the motor controller was insufficient, and the motor was reported to be severely faulty and the vehicle could not be driven.

Application content

The purpose of this application is to provide a charging control method, a charging control device, and an electric vehicle for an electric vehicle. After the charging is completed, the vehicle can be normally started and driven; and the problem of power loss of the lead-acid battery is solved.

The technical solutions of the embodiments of the present application are as follows:

A charging control method for an electric vehicle includes:

After the battery management system detects the charging gun signal, when it detects that the charging gun signal is abnormally disconnected, it sends a charging gun signal disconnection message to the vehicle controller;

The vehicle controller receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter, and sends a DC / DC conversion to the battery management system after the DC / DC converter stops working based on the shutdown instruction. Server down report message;

After receiving the DC / DC converter shutdown report message, the battery management system disconnects the main positive relay and the main negative relay of the battery.

In an embodiment, the detecting that the charging gun insertion signal is abnormally disconnected includes detecting a charging gun unplugging event when the charging pile is not swiped when charging is not started.

In one embodiment, after the DC / DC converter stops working based on the shutdown instruction, sending the DC / DC converter shutdown report message to the battery management system includes:

The vehicle controller detects the working status of the DC / DC converter;

When the vehicle controller detects that the DC / DC converter stops working, it sends a DC / DC converter shutdown report message to the battery management system.

In one embodiment, the method further includes:

When the battery management system detects the vehicle start command, it sends a start-up instruction to the vehicle controller;

The vehicle controller receives the startup instruction, sends a startup instruction to the DC / DC converter, and sends a DC / DC converter startup report message to the battery management system after the DC / DC converter starts to work based on the startup instruction;

After the battery management system receives the DC / DC converter startup report message, it closes the main positive relay and the main negative relay of the battery.

A charging control device for an electric vehicle includes:

A signal sending module for enabling the battery management system to send a charging gun signal disconnection message to the vehicle controller when it detects that the charging gun signal is abnormally disconnected;

The report sending module is used to enable the vehicle controller to receive the charging gun signal disconnection message, send a stop command to the DC / DC converter, and after the DC / DC converter stops working based on the stop command, The battery management system sends a DC / DC converter shutdown report message;

The relay control module is used to enable the battery management system to disconnect the main positive relay and the main negative relay of the battery after receiving the DC / DC converter shutdown report message.

In one embodiment, the report sending module is used to enable the vehicle controller to detect the working status of the DC / DC converter; when the vehicle controller detects that the DC / DC converter has stopped working, it reports to the battery The management system sends a DC / DC converter shutdown report message.

In one embodiment, the signal sending module is further configured to enable the battery management system to send a start-up instruction to the vehicle controller after detecting the vehicle start command;

The report sending module is further configured to enable the vehicle controller to receive the startup instruction, and send the startup instruction to the DC / DC converter. When the DC / DC converter starts to work based on the startup instruction, it sends the battery management system Send DC / DC converter startup report message;

The relay control module is further configured to enable the battery management system to close the main positive relay and the main negative relay of the battery after receiving the start-up report message of the DC / DC converter.

An electric vehicle includes the charging control device for an electric vehicle as described above.

A computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the steps of the charging control method for an electric vehicle according to any one of the preceding items are implemented.

As can be seen from the above technical solution, in the embodiment of the present application, after detecting the charging gun signal, the battery management system sends a charging gun signal to the vehicle controller when it detects that the charging gun signal is abnormally disconnected. Disconnection message; the vehicle controller receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter, and sends a DC / DC conversion to the battery management system when the DC / DC converter stops working based on the shutdown instruction Device shutdown report message; after receiving the DC / DC converter shutdown report message, the battery management system disconnects the battery's main positive relay and main negative relay. The applicant considers that the root cause of charging abuse lies in: after the battery management system cannot detect the gun insertion signal, immediately disconnect the battery's main positive relay and the main negative relay to disconnect the battery's main circuit, causing the DC / DC converter to be in Pressure failure and cannot be recovered. After applying the embodiment of the present application, after the battery management system cannot detect the gun insertion signal, the main positive relay and the main negative relay of the battery are not immediately disconnected to make the main circuit of the battery open, but the vehicle controller is notified to control the DC / The DC converter, so the DC / DC converter will not be under voltage fault, so that the vehicle can be started and driven normally after the charging is completed; and the problem of power loss of the lead-acid battery is solved.

Additional aspects and advantages of the present application will be given in part in the following description, part of which will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of a charging control method for an electric vehicle according to the present application.

FIG. 2 is an exemplary circuit diagram of a charging control of an electric vehicle according to the present application.

FIG. 3 is a control flowchart of the charging control method of the circuit shown in FIG. 2.

FIG. 4 is a structural diagram of a charging control device for an electric vehicle according to the present application.

detailed description

In order to have a clearer understanding of the technical features, objects, and effects of the application, specific embodiments of the present application will now be described with reference to the drawings, in which the same reference numerals represent the same parts.

For the sake of brevity and intuitiveness in description, the following describes the scheme of the present application by describing several representative embodiments. Numerous details in the embodiments are only used to help understand the scheme of the present application. However, it is obvious that the implementation of the technical solution of the present application may not be limited to these details. In order to avoid unnecessarily obscuring the solution of the present application, some embodiments are not described in detail, but only a framework is given. In the following, "including" means "including but not limited to" and "based on" means "at least based on ... but not limited to only based on ...". Due to the language habit of Chinese, when the number of a component is not specified in the following, it means that the component can be one or more, or can be understood as at least one.

Applicants' "GB / T 18487.1-2015: Electric Vehicle Conductive Charging System Part 1: General Requirements" Appendix B and "GB / T 27930-2015: Communication between Electric Vehicle Non-vehicle Conductive Charger and Battery Management System After detailed analysis in Appendix A of the Agreement, it was found that there are charging abuse scenarios in the prior art electric vehicle charging process, which may cause the vehicle to fail to start and run normally after charging is completed, and may also cause the lead-acid battery to lose power.

The charging abuse scenario is as follows:

After the vehicle is plugged into the charging gun and the charging function fails to turn on, if the user pulls the charging gun without swiping the card, the BMS cannot detect the gun insertion signal. At this time, BMS will disconnect the battery's main positive relay in consideration of safety factors. And the main negative relay, and cause the battery main circuit to be disconnected. However, the main circuit of the battery is disconnected and the input voltage of the DC / DC converter is undervoltage. The DC / DC converter will report an undervoltage fault. After that, the operator reinserts the charging gun correctly, swipes the card correctly, and starts charging. When charging is completed, the operator starts the vehicle for driving experiments. However, because the DC / DC converter is always in a fault state, the low-voltage 12V output of the DC / DC converter has been turned off, and the vehicle needs to use a 12V battery for power supply, causing the 12V battery to lose power. In addition, the low-voltage power supply voltage of the motor controller was insufficient, and the motor was reported to be severely faulty and the vehicle could not be driven.

In order to avoid the above-mentioned faults, the applicant proposed a battery charging technical solution with a modified control strategy. The applicant found that the root cause of the above-mentioned charging abuse was that after the BMS could not detect the gun insertion signal, the main positive relay and the main negative relay of the battery were disconnected immediately to disconnect the main circuit of the battery, which caused the DC / DC converter to be under voltage. Failure and cannot be recovered.

The applicant found that after the charging gun was unplugged, the BMS detected that the charging gun signal was disconnected and could send a charging gun signal disconnect message to the vehicle controller (VCU). After receiving the information, the VCU sends a stop command to the DC / DC converter, and the DC / DC executes the command to stop the work. At this time, after receiving the DC / DC stop work information, the BMS then disconnects the main positive relay and the main negative relay. Therefore, after the BMS cannot detect the gun insertion signal, it does not immediately disconnect the main positive relay and the main negative relay of the battery to disconnect the main circuit of the battery. Instead, it informs the VCU to control the DC / DC converter to shut down, thereby the DC / DC converter. Will not be in an undervoltage fault.

Based on the above analysis, FIG. 1 is a flowchart of a charging control method for an electric vehicle according to the present application.

As shown in Figure 1, the method includes:

Step 101: After detecting the charging gun signal, the BMS sends a charging gun signal disconnection message to the VCU when it detects that the charging gun signal is abnormally disconnected.

Step 102: The VCU receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter, and sends a DC / DC converter shutdown report message to the BMS after the DC / DC converter stops working based on the shutdown instruction;

Step 103: After receiving the DC / DC converter shutdown report message, the BMS disconnects the main positive relay and the main negative relay of the battery.

In one embodiment, detecting that the charging gun signal is abnormally disconnected in step 101 includes: detecting that the charging gun is pulled out in a state where the charging pile is not swiped when charging is not started.

In one embodiment, after the DC / DC converter stops working based on the shutdown instruction, sending a DC / DC converter shutdown report message to the BMS includes: the VCU detects the working status of the DC / DC converter; when DC / DC conversion is detected After the converter stops working, it sends a DC / DC converter shutdown report message to the BMS.

In one embodiment, after the charging is completed, the method further includes:

When the BMS detects the vehicle start command, it sends a start command to the VCU;

The VCU receives the power-on instruction and sends the power-on instruction to the DC / DC converter. When the DC / DC converter starts working based on the power-on instruction, it sends a DC / DC converter power-on report message to the BMS;

After receiving the start-up report message from the DC / DC converter, the BMS closes the battery's main positive relay and main negative relay.

It can be seen that after applying the embodiment of the present application, when the charging gun is abnormally pulled out during the charging process, the BMS detects that the charging gun signal is disconnected, and sends a charging gun signal disconnection message to the VCU. After receiving the charging gun signal disconnection message, the VCU sends a stop command to the DC / DC converter, and the DC / DC executes the stop command to stop the work. Then, after receiving the DC / DC stop working message, the BMS turns off the main positive relay and the main negative relay. Therefore, after the BMS cannot detect the gun insertion signal, it does not immediately disconnect the battery's main positive relay and main negative relay to disconnect the battery's main circuit, but instead informs the VCU to control the DC / DC converter to shut down. Will be in an undervoltage fault (but instead shut down normally). Therefore, when charging is completed, the operator starts the vehicle to conduct driving experiments. At this time, because the DC / DC converter was previously shut down normally (instead of being in a fault state), the DC / DC converter can be started normally and output 12V low voltage, and the vehicle does not need to use a 12V battery for power supply. In addition, the DC / DC converter works normally after startup, the low-voltage power supply voltage of the motor controller is normal, and the vehicle can run normally.

In Figure 2, the battery positive terminal is connected to the main positive relay; the battery negative terminal is connected to the main negative relay; the precharge relay is connected in parallel with the main positive relay. The battery main circuit also includes a fuse and a DC / DC converter. There is a Controller Area Network (CAN) connection between the BMS and the VCU. There is also a CAN connection between the VCU and the DC / DC converter. FIG. 3 is a control flowchart of the charging control method of the circuit shown in FIG. 2.

Charging process based on existing technology:

After the vehicle is plugged into the charging gun, the operator swipes the card at the charging post, and the BMS pulls in the battery's main positive relay and main negative relay. If charging fails to start and the operator pulls out the charging gun without swiping the card, the BMS and the charger are still communicating. The BMS disconnects the battery's main positive relay and main negative relay in consideration of safety factors. The DC / DC converter detects that the input DC voltage is lower than 163V. The DC / DC converter enters fault processing, and reports an input undervoltage hardware protection fault, and turns off the DC. / DC converter low-voltage 12V output. Then, the operator reinserted the charging gun again, swipe the card again, and started charging. After the charging is completed, start the vehicle for driving experiments. During this process, the DC / DC converter has been in a fault state. The low-voltage 12V output of the DC / DC converter has been turned off. The vehicle is completely powered by the 12V battery. . In addition, the low-voltage power supply voltage of the motor controller was insufficient, and the motor was reported to be severely faulty and the vehicle could not be driven.

Charging process based on this application:

After the vehicle is plugged into the charging gun, the operator swipes the card at the charging post, and the BMS pulls in the battery's main positive relay and main negative relay. If charging fails to start and the operator pulls out the charging gun without swiping the card, the BMS and the charger are still communicating. When the BMS detects that the charging gun signal is abnormally disconnected, it sends a charging gun signal disconnection message to the VCU based on the CAN connection. The VCU receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter based on the CAN connection, and sends a DC / DC converter shutdown report message to the BMS when the DC / DC converter stops working based on the shutdown instruction. After receiving the DC / DC converter shutdown report message, the BMS disconnects the battery's main positive relay and main negative relay. Then, the operator reinserted the charging gun again, swipe the card again, and started charging. After the charging is completed, the vehicle is started for driving experiments. In this process, the DC / DC converter was normally shut down (instead of being in a fault state), so the DC / DC converter can be started normally and output 12V low voltage. The vehicle does not need Use 12V battery for power supply. In addition, the DC / DC converter works normally after startup, the low-voltage power supply voltage of the motor controller is normal, and the vehicle can run normally.

Based on the above analysis, the embodiment of the present application also proposes a charging control device for an electric vehicle.

As shown in Figure 4, the device includes:

A signal sending module 401 is used to enable the BMS to send a charging gun signal disconnection message to the VCU when it detects that the charging gun signal is abnormally disconnected;

The report sending module 402 is used to enable the VCU to receive the charging gun signal disconnection message, send a shutdown instruction to the DC / DC converter, and send a DC / DC to the BMS after the DC / DC converter stops working based on the shutdown instruction. DC converter shutdown report message;

The relay control module 403 is used to enable the BMS to disconnect the main positive relay and the main negative relay of the battery after receiving the DC / DC converter shutdown report message.

In one embodiment, detecting that the charging gun signal is abnormally disconnected includes: detecting that the charging gun is unplugged when the charging pile is not swiped when charging is not started.

In one embodiment, the report sending module 402 is used to enable detection of the working status of the DC / DC converter; after detecting that the DC / DC converter has stopped working, it sends a DC / DC converter shutdown report message to the BMS.

In one embodiment, the signal sending module 401 is further configured to enable the BMS to send a start-up instruction to the VCU after detecting the vehicle start command;

The report sending module 402 is also used to enable the VCU to receive a startup instruction and send a startup instruction to the DC / DC converter. When the DC / DC converter starts to work based on the startup instruction, it sends a DC / DC converter startup report message to the BMS;

The relay control module 403 is further configured to enable the BMS to close the main positive relay and the main negative relay of the battery after receiving the start-up report message of the DC / DC converter.

It should be noted that not all steps and modules in the above processes and structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The division of each module is just to facilitate the description of the adopted function. In actual implementation, a module can be divided into multiple modules, and the functions of multiple modules can also be implemented by the same module. These modules can be located on the same device. , Or in a different device.

The hardware modules in the embodiments can be implemented mechanically or electronically. For example, a hardware module may include a specially designed permanent circuit or logic device (such as a special-purpose processor, such as an FPGA or ASIC) to perform a specific operation. A hardware module may also include a programmable logic device or circuit (eg, including a general-purpose processor or other programmable processor) temporarily configured by software for performing specific operations. As for the specific implementation of the mechanical module by mechanical means, or by using a dedicated permanent circuit or a temporarily configured circuit (such as by software), it can be determined according to cost and time considerations.

The application also provides a machine-readable storage medium storing instructions for causing a machine to perform a method as described herein. Specifically, a system or device provided with a storage medium may be provided, on which software program code that implements the functions of any one of the embodiments is stored, and the computer (or CPU or MPU) of the system or device is stored ) Read out and execute the program code stored in the storage medium. In addition, some or all of the actual operations can also be performed by an operating system or the like operating on a computer through instructions based on the program code. It is also possible to write the program code read from the storage medium into a memory provided in an expansion board inserted into the computer or into a memory provided in an expansion unit connected to the computer, and then install the program on the basis of instructions of the program code. The expansion board or the CPU on the expansion unit performs part and all of the actual operations, thereby realizing the functions of any one of the above embodiments.

Embodiments of the storage medium for providing program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as a CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD + RW), Magnetic tape, non-volatile memory card and ROM. Alternatively, the program code may be downloaded from a server computer or the cloud by a communication network.

The above descriptions are merely preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any modification, equivalent replacement, or improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

It should be noted that not all steps and modules in the above processes and system structure diagrams are necessary, and some steps or modules can be ignored according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented by multiple Some components in separate devices are implemented together.

In the above embodiments, the hardware unit may be implemented mechanically or electrically. For example, a hardware unit may include permanently dedicated circuits or logic (such as a dedicated processor, FPGA or ASIC) to perform the corresponding operations. The hardware unit may also include programmable logic or circuits (such as general-purpose processors or other programmable processors), which may be temporarily set by software to complete the corresponding operations. The specific implementation manner (mechanical manner, or a dedicated permanent circuit, or a temporarily set circuit) can be determined based on cost and time considerations.

The present application has been shown and described in detail above with reference to the drawings and preferred embodiments. However, the present application is not limited to these disclosed embodiments, and those skilled in the art can know based on the above multiple embodiments, and can combine the different embodiments described above. More embodiments of the present application are obtained, and these embodiments are also within the protection scope of the present application.

This application can be applied to various types of new energy vehicles, such as pure electric vehicles, hybrid vehicles, fuel cell vehicles, and so on.

In summary, in the embodiment of the present application, after detecting the charging gun signal, the battery management system sends the charging gun signal to the vehicle controller when it detects that the charging gun signal is abnormally disconnected. Message; the vehicle controller receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter, and sends a DC / DC converter shutdown to the battery management system when the DC / DC converter stops working based on the shutdown instruction Report message; the battery management system disconnects the battery's main positive relay and main negative relay after receiving the DC / DC converter shutdown report message. The applicant considers that the root cause of charging abuse lies in: after the battery management system cannot detect the gun insertion signal, immediately disconnect the battery's main positive relay and the main negative relay to disconnect the battery's main circuit, causing the DC / DC converter to be in Pressure failure and cannot be recovered.

After applying the embodiment of the present application, after the battery management system cannot detect the gun insertion signal, the main positive relay and the main negative relay of the battery are not immediately disconnected to make the main circuit of the battery open, but the vehicle controller is notified to control the DC / The DC converter, so the DC / DC converter will not be under voltage fault. After the charging is completed, the vehicle can be started and driven normally; and the problem of power loss of the lead-acid battery is solved.

The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of this application, and are not intended to limit the scope of protection of this application. Any equivalent implementation or Changes, such as the combination, division or duplication of features, shall be included in the protection scope of this application.

Claims

A charging control method for an electric vehicle, comprising:

After the battery management system detects the charging gun signal, when it detects that the charging gun signal is abnormally disconnected, it sends a charging gun signal disconnection message to the vehicle controller;

The vehicle controller receives the charging gun signal disconnection message, sends a shutdown instruction to the DC / DC converter, and sends a DC / DC conversion to the battery management system after the DC / DC converter stops working based on the shutdown instruction. Server down report message;

After receiving the DC / DC converter shutdown report message, the battery management system disconnects the main positive relay and the main negative relay of the battery.
The charging control method for an electric vehicle according to claim 1, wherein the detecting that the charging gun signal is abnormally disconnected comprises: detecting that the charging pile has not been swiped when charging is not started. The charging gun was pulled out.
The charging control method for an electric vehicle according to claim 1, wherein after the DC / DC converter stops working based on the shutdown instruction, sending the DC / DC converter shutdown report message to the battery management system comprises:

The vehicle controller detects the working status of the DC / DC converter;

When the vehicle controller detects that the DC / DC converter stops working, it sends a DC / DC converter shutdown report message to the battery management system.
The charging control method for an electric vehicle according to claim 1, further comprising:

When the battery management system detects the vehicle start command, it sends a start-up instruction to the vehicle controller;

The vehicle controller receives the startup instruction, sends a startup instruction to the DC / DC converter, and sends a DC / DC converter startup report message to the battery management system after the DC / DC converter starts to work based on the startup instruction;

After the battery management system receives the DC / DC converter start-up report message, it closes the main positive relay and the main negative relay of the battery.
A charging control device for an electric vehicle, comprising:

A signal sending module for enabling the battery management system to send a charging gun signal disconnection message to the vehicle controller when it detects that the charging gun signal is abnormally disconnected;

The report sending module is used to enable the vehicle controller to receive the charging gun signal disconnection message, send a stop command to the DC / DC converter, and after the DC / DC converter stops working based on the stop command, The battery management system sends a DC / DC converter shutdown report message;

The relay control module is used to enable the battery management system to disconnect the main positive relay and the main negative relay of the battery after receiving the DC / DC converter shutdown report message.
The charging control device for an electric vehicle according to claim 5, wherein:

The detecting that the charging gun insertion signal is abnormally disconnected includes: detecting that the charging gun is pulled out in a state where the charging pile is not swiped when the charging is not started.
The charging control device for an electric vehicle according to claim 5, wherein:

The report sending module is used to enable the vehicle controller to detect the working status of the DC / DC converter; when the vehicle controller detects that the DC / DC converter has stopped working, send a DC / DC to the battery management system Converter down report message.
The charging control device for an electric vehicle according to claim 5, wherein:

The signal sending module is further configured to enable the battery management system to send a start-up instruction to the vehicle controller after detecting the vehicle start command;

The report sending module is further configured to enable the vehicle controller to receive the startup instruction and send a startup instruction to the DC / DC converter, and when the DC / DC converter starts to work based on the startup instruction, send it to a battery management system. Send DC / DC converter startup report message;

The relay control module is further configured to enable the battery management system to close the main positive relay and the main negative relay of the battery after receiving the DC / DC converter startup report message.
An electric vehicle, comprising a charging control device for an electric vehicle according to claim 5.
A computer-readable storage medium having stored thereon a computer program, characterized in that when the computer program is executed by a processor, the steps of the charging control method for an electric vehicle according to any one of claims 1 to 4 are implemented .