Battery management system, control method, vehicle, storage medium, and program product

Abstract

The embodiment of the invention provides a battery management system, a control method, a vehicle, a storage medium and a program product, and the method comprises the steps: obtaining a universal signal stored before the battery management system is restarted, and the universal signal comprises one or more of a high-voltage state, a relay state and a relay control signal; receiving the wake-up signal and a request instruction of a vehicle control unit; if the universal signal, the wake-up signal and the request instruction of the vehicle control unit meet the rapid recovery condition, the battery management system is controlled to recover to the state before resetting; and a whole vehicle parameter signal is sent to realize stable and continuous interaction with the outside. The battery management system is controlled to recover to the state before resetting by judging that the universal signal, the wake-up signal and the request instruction of the vehicle control unit meet the rapid recovery condition, charging is continued or power is maintained, and interruption of an external power supply and a power supply line caused by relay disconnection due to initialization is avoided.

Description

Technical Field

[0001] The present application relates to the field of battery control technology, and in particular to a battery management system, a control method, a vehicle, a storage medium and a program product. Background Art

[0002] During the operation of the battery management system, the battery management system may restart or reset due to some reasons. When the battery management system restarts, it will affect the normal communication and control of the electric vehicle. During initialization, the battery management system is in the initialization state, and the vehicle CAN signal sends the initial value; after the initialization is completed, the relay is actively disconnected, and then the subsequent actions are completed according to the vehicle power-on command.

[0003] If a software restart occurs while the electric vehicle is driving, the relay will automatically disconnect, causing power interruption and thus creating a safety risk for the entire vehicle. Secondly, if a software restart occurs while the electric vehicle is charging, the external power supply to the battery will be disconnected, resulting in charging failure and inability to continue charging. Summary of the invention

[0004] The battery management system, control method, vehicle, storage medium and program product provided in the embodiments of the present application are used to solve the problem of external power supply and power supply line interruption after the battery management system is restarted or reset.

[0005] In a first aspect, an embodiment of the present application provides a control method for a battery management system, the method comprising:

[0006] Obtaining a general signal stored before the battery management system is restarted, where the general signal includes one or more of a high voltage state, a relay state, and a relay control signal;

[0007] Receive wake-up signals and request instructions from the vehicle controller;

[0008] If the general signal, wake-up signal and vehicle controller request command meet the fast recovery conditions, the battery management system is controlled to be restored to the state before reset;

[0009] Send vehicle parameter signals to achieve stable and continuous interaction with the outside world.

[0010] In one embodiment, if the general signal and the wake-up signal meet the fast recovery condition, the battery management system is controlled to switch to the state before the reset, specifically including:

[0011] If the wake-up signal is reset, the request instruction is consistent with the relay control signal and the general signal meets the preset conditions;

[0012] It is forbidden to send vehicle parameter signals, and the battery management system is controlled to return to the state before reset.

[0013] In one embodiment, the general signal satisfies a preset condition, specifically including:

[0014] The high voltage state is one of a driving state, a slow charging state and a fast charging state; the relay state is a closed state; and the relay control instruction is to control the relay to be closed.

[0015] In one embodiment, if the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to be restored to the state before the reset, specifically including:

[0016] If the high pressure state is driving state;

[0017] Maintain the relay state in a closed state and control the battery management system to return to the driving state.

[0018] In one embodiment, if the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to be restored to the state before the reset, specifically including:

[0019] If the high voltage state is slow charging state;

[0020] Maintain the relay state in a closed state, adjust the slow charging parameters, and control the battery management system to return to the slow charging state.

[0021] In one embodiment, if the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to be restored to the state before the reset, specifically including:

[0022] If the high voltage state is a fast charge state;

[0023] Maintain the relay state in a closed state, and maintain the fast charge relay in a closed state;

[0024] Adjust the fast charging parameters and control the battery management system to return to the fast charging state.

[0025] In one embodiment, before obtaining the general signal stored before the battery management system is restarted, the method includes:

[0026] When the high voltage state changes, the common signal of the current state is stored.

[0027] In one embodiment, the method further comprises:

[0028] If the general signal, wake-up signal and vehicle controller request command do not meet the fast recovery conditions;

[0029] Detect the battery current;

[0030] If the battery current is valid and the current is less than the preset current value, the control relay is disconnected;

[0031] Otherwise, if the request instruction of the vehicle controller is a high-voltage request, the battery management system is controlled to execute the high-voltage process.

[0032] In one embodiment, the method further comprises:

[0033] The interval time from controlling the battery management system to sending the vehicle parameter signal is less than the timeout judgment time for interacting with the outside.

[0034] In a second aspect, the present application provides a battery management system, including: a memory, a processor;

[0035] Memory stores computer-executable instructions;

[0036] The processor executes the computer-executable instructions stored in the memory, so that the processor executes any of the above-mentioned control methods for the battery management system.

[0037] In a third aspect, the present application provides a vehicle, comprising a battery and a battery management system as described above.

[0038] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement a control method for a battery management system such as any of the above.

[0039] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements any of the above-mentioned control methods for the battery management system.

[0040] The battery management system, control method, vehicle, storage medium and program product provided by the embodiment of the present application include: obtaining the general signal stored before the battery management system is restarted, the general signal includes one or more of the high voltage state, relay state and relay control signal; receiving the wake-up signal and the request instruction of the vehicle controller; if the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to be restored to the state before the reset; the vehicle parameter signal is sent to achieve stable and continuous interaction with the outside. By judging whether the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to be restored to the state before the reset, and charging continues or power is maintained, so as to avoid the initialization causing the relay to be disconnected and the external power supply and power supply line to be interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0042] Figure 1 A flowchart of a control method for a battery management system provided in one embodiment of the present application;

[0043] Figure 2 A flowchart of a control method for a battery management system provided in one embodiment of the present application;

[0044] Figure 3 A flowchart of resetting the slow charging state of a battery management system provided in an embodiment of the present application;

[0045] Figure 4 A flowchart of resetting the fast charging state of a battery management system provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of the battery management system provided for this application;

[0047] Figure 6 A flowchart of a control method for a battery management system provided in one embodiment of the present application.

[0048] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0049] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] For new energy vehicles, power batteries are one of their power sources. The battery management system controls the upper and lower high voltages, power output, and vehicle interaction functions of the power battery, and plays an important role. When there is external electromagnetic interference, internal software program deadlock, runaway, and resource usage shortage, the battery management system software will have reset problems, causing the battery controller system to work abnormally, which may affect the safety of the vehicle and the driver.

[0051] When the power battery is in a high-voltage state, after the battery management system is restarted or reset, the battery management system state is in the initialization state, and the vehicle CAN signal sends the initial value; after the initialization is completed, the relay is actively disconnected, and then the subsequent actions are completed according to the vehicle power-on command. When the inventor was conceiving the scheme of this application, he found that the scheme of the prior art has the following shortcomings: Power interruption risk: If the vehicle is driving at this time, after the software is reset, the relay is actively disconnected, and a power interruption will occur, causing a safety risk to the whole vehicle; Charging interruption risk: If the electric vehicle is charging, the battery management system is restarted or reset, and the charging fails due to the disconnection of the relay and cannot continue. Relay sintering risk: After the software is reset, the relay is actively disconnected. If the current is too large at this time, there will be a risk of sintering of the battery pack relay, affecting the life of the relay.

[0052] The control method of the battery management system provided in the present application controls the battery management system to return to the state before resetting by judging whether the general signal, wake-up signal and request instruction of the vehicle controller meet the quick recovery conditions, continues charging or maintains power, and avoids the initialization causing the relay to disconnect and cause the external power supply and power supply line to be interrupted.

[0053] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0054] The present application provides a control method for a battery management system. Figure 1 This is a flowchart of a control method for a battery management system provided in one embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0055] Step S102: Acquire a general signal stored before the battery management system is restarted, where the general signal includes one or more of a high voltage state, a relay state, and a relay control signal.

[0056] Specifically, when the battery management system is operating normally, it collects high-voltage status, relay status, and relay control signals, and stores these signals in non-volatile memory (such as EEPROM or flash memory) to ensure that data is not lost after the system is powered off or restarted. Among them, the high-voltage status does not only refer to the status of the battery, but also refers to the status of the entire high-voltage electrical system, including the working conditions of all high-voltage components including the battery.

[0057] Step S104: receiving a wake-up signal and a request instruction from the vehicle controller.

[0058] Specifically, the battery management system includes a reset circuit, and when the battery management system is reset, the reset circuit generates a wake-up signal. The vehicle controller sends a request instruction to the battery management system, and the request instruction is a relay control signal for controlling the relay to open or close.

[0059] Step S106: If the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, the battery management system is controlled to recover to the state before the reset.

[0060] Specifically, by determining that the general signal, the wake-up signal and the request instruction of the vehicle controller all meet the quick recovery conditions, the battery management system is controlled to be restored to the state before reset, and the general signal read in step S102 is restored to the battery management system to restore it to the working state before reset.

[0061] Step S108: Send the vehicle parameter signal to achieve stable and continuous interaction with the outside.

[0062] Specifically, the vehicle parameter signal generally refers to a series of data and information related to the vehicle's operating status and performance. These signals may include but are not limited to the following signals: the vehicle's current speed, engine speed, remaining fuel in the fuel tank, remaining battery power, engine temperature, transmission temperature information, the working status of the braking system, including brake pressure, etc. The vehicle parameter signal can be transmitted to an external system or device through an on-board network (such as a CAN bus) to achieve stable and continuous interaction with the outside, ensure the reliability and continuity of data transmission, and ensure that the external system can accurately obtain the real-time status information of the vehicle.

[0063] This application determines whether the general signal, wake-up signal and request instruction of the vehicle controller meet the quick recovery conditions, controls the battery management system to return to the state before reset, and then sends the vehicle parameter information to ensure that the interaction between the battery management system and other controllers will not be interrupted due to reset, thereby improving the stability of the battery management system function; preventing power interruption, relay sintering and other problems, and improving the safety of the vehicle and battery pack.

[0064] In one embodiment, step S106 specifically includes the following steps: Figure 2 As shown, Figure 2 A flowchart of a control method for a battery management system provided in an embodiment of the present application:

[0065] Step S202: If the wake-up signal is reset, the request instruction is consistent with the relay control signal and the general signal meets the preset conditions.

[0066] Step S204: prohibiting the sending of vehicle parameter signals, and controlling the battery management system to return to the state before resetting.

[0067] Specifically, it is prohibited to send vehicle parameter signals, and the sending of vehicle parameter signals should be avoided, which will cause the relay to disconnect, interrupt the battery management system's function of interacting with other controllers, and cause power interruption, charging interruption and relay sintering problems.

[0068] In one of the embodiments, the sending of CAN messages of the entire vehicle is prohibited to prevent other controllers of the entire vehicle from receiving invalid values ​​or initial values ​​and terminating the current function. If it is a fast recovery in the fast charging state, the sending of fast charging CAN messages is also prohibited to prevent the fast charging pile from receiving abnormal messages or signals and actively stopping the fast charging interaction.

[0069] In one embodiment, the general signal in step S202 satisfies the preset condition specifically including:

[0070] The high voltage state is one of a driving state, a slow charging state and a fast charging state; the relay state is a closed state; and the relay control instruction is to control the relay to close.

[0071] Specifically, the high-voltage state is the driving state, slow-charging state and fast-charging state, which can be seen from the vehicle's running state. The driving state means that the vehicle is started and driving; the slow-charging state means that the vehicle is plugged in for slow charging; and the fast-charging state means that the vehicle is plugged in for fast charging. Secondly, the driving state, slow-charging state and fast-charging state can also be determined through the "vehicle driving state, high-voltage battery state, relay state, charging state, plug-in state" and other signals in the general signal.

[0072] In one embodiment, the relay states include the following: initialization state: the state when the self-check is not completed when the software is started; disconnected state: the relay is actually disconnected; closed state: the relay is actually closed; invalid state: that is, a state that cannot be determined.

[0073] In one embodiment, step S106 specifically includes the following steps:

[0074] If the high pressure state is driving state.

[0075] Maintain the relay state in a closed state and control the battery management system to return to the driving state.

[0076] In one embodiment, step S106 specifically includes the following steps: Figure 3 As shown, Figure 3 A flowchart of resetting the slow charging state of a battery management system provided in an embodiment of the present application:

[0077] If the high voltage state is a slow charging state.

[0078] Maintain the relay state in the closed state, adjust the slow charging parameters, and control the battery management system to return to the slow charging state.

[0079] Specifically, the slow charge parameters include: slow charge request flag; slow charge request current; slow charge request voltage. When the battery management system is reset in the slow charge state, it does not perform pre-charging, maintains the closed state of the main negative and main positive relays, and ensures that the charging circuit quickly reaches high voltage; at the same time, the charging request flag, charging request voltage, charging request current and other signals sent by the battery management system are quickly adjusted to the values ​​corresponding to the slow charge state, i.e., the slow charge parameters, to control the battery management system to return to the slow charge state.

[0080] In one embodiment, step S106 specifically includes the following steps: Figure 4 As shown, Figure 4 A flowchart of resetting the fast charging state of a battery management system provided in an embodiment of the present application:

[0081] If the high voltage state is fast charging state.

[0082] Maintain the relay state in a closed state and maintain the fast charge relay in a closed state.

[0083] Adjust the fast charging parameters and control the battery management system to return to the fast charging state.

[0084] Specifically, if the fast charge state is reset, it is necessary to restore to the high-voltage fast charge state without pre-charging, and maintain the closed state of the main negative, main positive, fast charge negative, and fast charge positive to ensure that the charging circuit quickly reaches high voltage; at the same time, the charging request flag, charging request voltage, charging request current and other signals sent by the battery management system vehicle CAN are quickly adjusted to the values ​​corresponding to the fast charge state, that is, the fast charge parameters; at the same time, the sending state of the fast charge CAN message is adjusted to the state of sending BCL (Battery Charge Level), BCS (Battery Charge Status), BSM (Battery Charge Information, Battery Status Message) and other messages. Sending the vehicle parameter signal can be understood as sending the vehicle CAN message and the fast charge CAN message to achieve stable and continuous interaction with external equipment or external devices.

[0085] In one embodiment, before obtaining the general signal stored before the battery management system is restarted, the method includes:

[0086] When the high voltage state changes, the common signal of the current state is stored.

[0087] Specifically, when the high-voltage state changes, the general signal in the current state is immediately stored. The high-voltage state in the general signal is the latest state of the battery management system, including driving state, slow charging state, fast charging state, and no high voltage. The relay state in the current state and the relay closing instruction in the current state are immediately stored.

[0088] In one embodiment, the method further comprises the following steps:

[0089] If the general signal, wake-up signal and vehicle controller's request command do not meet the fast recovery conditions.

[0090] Detect the battery current.

[0091] If the battery current is valid and the current is less than the preset current value, the control relay is disconnected.

[0092] Otherwise, if the request instruction of the vehicle controller is a high-voltage request, the battery management system is controlled to execute the high-voltage process.

[0093] Specifically, the high-voltage process is to close the relay according to the strategy. At this time, the CAN signal will not be prohibited from sending, the vehicle parameters will not be adjusted, and the functions of the battery management system before restarting will not be quickly restored.

[0094] In one embodiment, if Figure 6 As shown, Figure 6 A flowchart of a control method for a battery management system provided in an embodiment of the present application. In this embodiment, the absolute value of the current flowing through the battery is less than the preset current value, and the preset current value is 5A. The present application does not limit the preset current value, and the value of the preset current value can be determined according to actual conditions.

[0095] In one embodiment, the control method of the battery management system further includes the following steps:

[0096] The interval time from controlling the battery management system to sending the vehicle parameter signal is less than the timeout judgment time for interacting with the outside.

[0097] Specifically, the execution process of the control method of the battery management system after reset should be fast, and the interval time from the start of the control software to the final message outgoing should be controlled to prevent other controllers or fast charging piles of the vehicle from stopping functional interaction due to timeout judgment. The interval time for the vehicle CAN message to be sent is less than the time when other controllers judge that the battery management system message has timed out. The setting of this interval time is determined according to the specific vehicle model configuration and the actual situation, and this application does not limit it.

[0098] If the battery management system recovers quickly under fast charging, the interval between fast charging CAN messages is less than the time when the fast charging pile determines that the battery management system fast charging message has timed out. Optionally, the message timeout for national standard fast charging is less than 1s. Optionally, the message timeout for international fast charging can be determined based on the specific vehicle model configuration.

[0099] The present application provides a battery management system, including: a memory, a processor;

[0100] Memory stores computer-executable instructions;

[0101] The processor executes the computer-executable instructions stored in the memory, so that the processor executes any of the above-mentioned control methods for the battery management system.

[0102] Figure 5 This is a schematic diagram of the structure of the battery management system provided in this application. Figure 5 As shown, the battery management system 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 also includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0103] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that at least one processor 501 executes the above method.

[0104] The specific implementation process of the processor 501 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0105] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0106] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0107] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0108] The present application provides a vehicle, including a battery and a battery management system as described above.

[0109] The present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement any of the above-mentioned control methods for a battery management system.

[0110] The present application provides a computer program product, including a computer program, which implements any of the above-mentioned control methods for a battery management system when executed by a processor.

[0111] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0112] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0113] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0114] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0115] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0116] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0117] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0118] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A control method for a battery management system, characterized in that: The method comprises: Acquire a general signal stored before the battery management system is restarted, wherein the general signal includes one or more of a high voltage state, a relay state, and a relay control signal; Receive wake-up signals and request instructions from the vehicle controller; If the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, control the battery management system to recover to the state before the reset; Send vehicle parameter signals to achieve stable and continuous interaction with the outside world.

2. The control method of the battery management system according to claim 1, characterized in that: If the general signal and the wake-up signal meet the fast recovery condition, controlling the battery management system to switch to the state before the reset specifically includes: If the wake-up signal is a reset, the request instruction is consistent with the relay control signal, and the general signal meets the preset conditions; The sending of vehicle parameter signals is prohibited, and the battery management system is controlled to be restored to the state before reset.

3. The control method of the battery management system according to claim 2, characterized in that: The general signal meets the preset conditions, specifically including: The high-voltage state is one of a driving state, a slow charging state and a fast charging state; the relay state is a closed state; and the relay control instruction is to control the relay to close.

4. The control method of the battery management system according to claim 1, characterized in that: If the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, controlling the battery management system to recover to the state before the reset specifically includes: If the high pressure state is a driving state; Maintain the relay state in a closed state and control the battery management system to return to a driving state.

5. The control method of the battery management system according to claim 1, characterized in that: If the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, controlling the battery management system to recover to the state before the reset specifically includes: If the high voltage state is a slow charging state; Maintain the relay state in a closed state, adjust the slow charging parameters, and control the battery management system to return to a slow charging state.

6. The control method of the battery management system according to claim 1, characterized in that: If the general signal, the wake-up signal and the request instruction of the vehicle controller meet the fast recovery condition, controlling the battery management system to recover to the state before the reset specifically includes: If the high voltage state is a fast charging state; Maintaining the relay state in a closed state, and maintaining the fast charging relay in a closed state; Adjust the fast charging parameters to control the battery management system to return to the fast charging state.

7. The control method of the battery management system according to claim 1, characterized in that: Before obtaining the common signal stored before the battery management system restarts, including: When the high voltage state changes, the common signal in the current state is stored.

8. The control method of the battery management system according to claim 1, characterized in that: The method further comprises: If the general signal, the wake-up signal and the request instruction of the vehicle controller do not meet the fast recovery condition; detecting the current of the battery; If the battery current is valid and the current is less than a preset current value, controlling the relay to disconnect; Otherwise, if the request instruction of the vehicle controller is a high-voltage request, the battery management system is controlled to execute the high-voltage process.

9. The control method of a battery management system according to any one of claims 1 to 8, characterized in that: The method further comprises: The interval time from restarting the battery management system to sending the vehicle parameter signal is controlled to be less than the timeout judgment time of interacting with the outside.

10. A battery management system, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor executes the control method of the battery management system according to any one of claims 1 to 9.

11. A vehicle, characterized in that: The invention comprises a battery and a battery management system as claimed in claim 9.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the control method of the battery management system according to any one of claims 1 to 9.

13. A computer program product, characterized in that It comprises a computer program, which, when executed by a processor, implements the control method of the battery management system according to any one of claims 1 to 9.

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