Relay control method, system, device and medium for battery state jump anomaly

Abstract

The application discloses a relay control method, system and device for battery state jump exception and a medium. The method comprises the following steps: when the battery high-voltage state jumps abnormally, the states of each relay in a battery charging and discharging circuit, the current battery high-voltage state and the target battery high-voltage state to be jumped are obtained; according to the states of each relay, the current battery high-voltage state and the target battery high-voltage state to be jumped, the working condition category to which the battery high-voltage state jump belongs is determined; according to the working condition category to which the battery high-voltage state jump belongs, the states of each relay are controlled to switch, and the battery high-voltage state is rolled back to a drivable state or a no-power output state. When the battery high-voltage state jumps abnormally, the method flexibly judges the battery high-voltage state to be rolled back based on different working condition categories, the actual state of the relay is consistent with the battery high-voltage state, and the accuracy of information interaction with other functions or controllers is ensured.

Description

Technical Field

[0001] This invention belongs to the field of relay control technology, and in particular relates to a relay control method, system, device and medium for abnormal battery state transition. Background Technology

[0002] The battery management system is an important controller in new energy vehicles. One of its key functions is to control relays based on control commands issued by the vehicle controller or the internal state of the battery.

[0003] The battery management system (BMS) needs to perform high-voltage state calculations while controlling relays. The internal functional modules of the BMS and the vehicle controller will then perform corresponding operations based on this high-voltage state, such as charging interaction, driving loads, and discharging residual voltage. A prerequisite for these operations to proceed smoothly is that the actual state of the relays corresponds correctly to the high-voltage state of the battery. Otherwise, inconsistencies between the actual open and closed states of the relays and the battery's high-voltage state may occur, leading to operational failures.

[0004] The battery management system controls the relays step by step according to a set procedure. If all steps complete normally, the battery high-voltage state can switch to the corresponding state. However, end-user scenarios are numerous and varied, and abnormalities may occur during the relay closing or opening process, or the vehicle controller commands may change during relay operation. In such cases, it is necessary to handle these abnormal scenarios. Currently, a common approach in the market for such abnormal transitions is to completely revert to a no-power output state. The advantage is that it better ensures that the actual state of the relays is consistent with the battery high-voltage state. However, the disadvantage is that high voltage is applied in some unnecessary operating conditions, which not only affects the end-user experience but also reduces the lifespan of the relays. Summary of the Invention

[0005] The purpose of this invention is to provide a relay control method, system, device, and medium for abnormal battery state transitions. By selecting to revert to a no-power output state or a driveable state based on different preconditions when the battery high-voltage state transitions abnormally, this invention solves the technical problem in the prior art where all batteries revert to a no-power output state when the battery high-voltage state transitions abnormally, resulting in high voltage being applied in some unnecessary operating conditions.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] This invention provides a relay control method for abnormal battery state transition, comprising:

[0008] When the battery high voltage state jumps abnormally, the status of each relay in the battery charging and discharging circuit, the current battery high voltage state, and the target battery high voltage state to be jumped are obtained.

[0009] Based on the status of each relay, the current high-voltage status of the battery, and the target high-voltage status of the battery to be switched, determine the operating condition category to which the high-voltage status switch belongs.

[0010] The relays are controlled to switch states according to the operating condition category of the battery high voltage state, and the battery high voltage state is returned to the driveable state or the no-power output state.

[0011] In one embodiment of the present invention, when the battery high-voltage state jumps abnormally, acquiring the states of each relay in the battery charging and discharging circuit, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes:

[0012] Receive control commands from the vehicle controller to switch the battery high-voltage status;

[0013] According to the control command, the relays are controlled to switch states. When the relays cannot close or open normally, the states of each relay, the current high voltage state of the battery, and the high voltage state of the target battery to be switched are obtained.

[0014] In one embodiment of the present invention, when the battery high-voltage state jumps abnormally, obtaining the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes:

[0015] Receive control commands from the vehicle controller to switch the battery high-voltage status;

[0016] The control commands control each of the relays to switch states. When the control commands change during the operation of the relays, the state of each relay, the current high voltage state of the battery, and the high voltage state of the target battery to be switched are obtained.

[0017] In one embodiment of the present invention, the high-voltage state of the battery includes a no-power output state, a driveable state, an AC charging state, a DC charging state, and a DC charging preheating state.

[0018] In one embodiment of the present invention, determining the operating condition category to which the battery high-voltage state jump belongs based on the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes:

[0019] The first operating condition is defined as follows: when the states of each relay, the current high-voltage state of the battery, and the high-voltage state of the target battery to be switched to meet any of the following conditions, the second operating condition is defined as follows:

[0020] The current battery high-voltage state is either DC charging or driveable, while the target battery high-voltage state to be switched to is DC charging preheating and the main relay is not activated; or

[0021] The current battery high-voltage state is DC-chargeable, and the target battery high-voltage state to be switched to is driveable; or

[0022] The current high voltage state of the battery is driveable, and the high voltage state of the target battery to be switched to is DC chargeable.

[0023] In one embodiment of the present invention, the battery charging and discharging circuit is provided with a main relay, a pre-charge relay and a fast-charge relay;

[0024] The step of controlling each of the relays to switch states according to the operating condition category to which the battery high-voltage state belongs, and returning the battery high-voltage state to a driveable state or a no-power output state, includes:

[0025] When the battery high-voltage state switches to the first operating condition, the main relay is closed, the pre-charge relay and the fast-charge relay are opened, and the battery high-voltage state is returned to the driveable state.

[0026] In one embodiment of the present invention, the battery charging and discharging circuit is provided with a main relay, a pre-charge relay and a fast-charge relay;

[0027] The step of controlling each of the relays to switch states according to the operating condition category to which the battery high-voltage state belongs, and returning the battery high-voltage state to a driveable state or a no-power output state, includes:

[0028] When the battery high-voltage state switches to the second operating condition, the main relay, the pre-charge relay and the fast-charge relay are all disconnected, and the battery high-voltage state is returned to the no-power output state.

[0029] Based on the same inventive concept, another embodiment of the present invention provides a relay control system for abnormal battery state transition, the system comprising:

[0030] The acquisition module is used to acquire the status of each relay in the battery charging and discharging circuit, the current battery high voltage status, and the target battery high voltage status to be transferred when the battery high voltage status jumps abnormally.

[0031] The determination module is used to determine the operating condition category to which the battery high voltage state jump belongs based on the states of each relay, the current battery high voltage state, and the target battery high voltage state to be jumped.

[0032] The control module is used to control the relays to switch states according to the operating condition category of the battery high voltage state, and to return the battery high voltage state to the driveable state or the no-power output state.

[0033] Based on the same inventive concept, another embodiment of the present invention also provides an electronic device, the electronic device comprising:

[0034] One or more processors;

[0035] A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the relay control method for abnormal battery state transition as described above.

[0036] Based on the same inventive concept, another embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a computer processor, causes the computer to execute the relay control method for abnormal battery state transition described in any of the preceding claims.

[0037] As described above, the relay control method for abnormal battery high-voltage state transition provided by this invention has the following beneficial effects: When the battery high-voltage state transitions abnormally, it does not always revert to a no-power output state, but rather flexibly determines the reverting battery high-voltage state based on different operating conditions, improving user experience and increasing relay lifespan. Simultaneously, after the abnormal battery high-voltage state transition is resolved, the actual relay state remains consistent with the battery high-voltage state, thereby ensuring the accuracy of information interaction with other functions or controllers. Of course, any product implementing this invention does not necessarily need to simultaneously achieve all the advantages described above. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating a relay control method for a battery state transition anomaly provided in an exemplary embodiment of this application.

[0040] Figure 2 A schematic diagram of a high-voltage architecture for a power battery provided for an exemplary embodiment of this application.

[0041] Figure 3 This is a schematic diagram of a relay command provided for switching between high-voltage states of a battery, as an exemplary embodiment of this application.

[0042] Figure 4This is a schematic diagram illustrating the mutual switching and abnormal handling between high-voltage states of a battery, provided as an exemplary embodiment of this application.

[0043] Figure 5 A flowchart of the handling logic for a relay malfunction provided in an exemplary embodiment of this application.

[0044] Figure 6 A block diagram of a relay control system for a battery state transition anomaly, provided as another exemplary embodiment of this application.

[0045] Figure 7 This is a schematic diagram of the structure of an electronic device provided for another exemplary embodiment of this application. Detailed Implementation

[0046] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0047] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0048] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0049] The vehicle controller and the battery management system communicate with each other via the vehicle communication bus. The vehicle controller allocates the energy of the power battery according to the driver's driving intention and the actual needs of the vehicle. It calculates the power and energy required by the vehicle by receiving the status information provided by the battery management system, and then sends corresponding control commands to the battery management system to ensure that the battery is charged and discharged in a suitable state.

[0050] The battery management system controls relays based on control commands issued by the vehicle controller or the internal state of the battery. Depending on the operating scenario, the battery high-voltage state can be categorized into no-power-output state, drivable state, AC-charging-ready state, DC-charging-ready state, and DC-charging preheating state. The relays include main relays, pre-charge relays, and fast-charge relays. The main relays further include a main positive relay and a main negative relay, and the fast-charge relays include a fast-charge positive relay and a fast-charge negative relay. The positions of each relay in the high-voltage architecture of the power battery are as follows: Figure 1 As shown in Table 1, the correspondence between the battery high-voltage state and the relay state is as follows.

[0051] Table 1

[0052]

[0053] It should be noted that in Table 1, the relay states corresponding to the battery high-voltage states being drivable and AC charging is the same. At this time, the battery management system switches the corresponding battery high-voltage states through the charging gun state, the charging commands from the vehicle controller, and the commands related to AC charging from the charger.

[0054] To address the problem in existing technologies where all batteries revert to a no-power output state when an abnormal high-voltage state occurs, thus causing high voltage to be applied unnecessarily, this invention provides a relay control method for abnormal battery state transitions. When an abnormal high-voltage state occurs, the battery management system flexibly determines the appropriate high-voltage state to revert to based on different operating condition categories. Furthermore, after the abnormal high-voltage state transition is resolved, the actual relay state remains consistent with the battery high-voltage state. Please refer to [link / reference]. Figure 2 As shown, the relay control method for abnormal battery state transition includes the following steps:

[0055] S100: When the battery high voltage state jumps abnormally, obtain the status of each relay in the battery charging and discharging circuit, the current battery high voltage state, and the target battery high voltage state to be jumped;

[0056] S200: Determine the operating condition category to which the battery high voltage state jump belongs based on the states of each relay, the current battery high voltage state, and the target battery high voltage state to be jumped;

[0057] S300: Controls each relay to switch states according to the operating condition category of the battery high voltage state, and returns the battery high voltage state to the driveable state or the no-power output state.

[0058] The steps of the relay control method for the above-mentioned abnormal battery state transition will be discussed in detail below.

[0059] First, execute step S100, which is to obtain the status of each relay in the battery charging and discharging circuit, the current battery high voltage status, and the target battery high voltage status to be switched when the battery high voltage status jumps abnormally.

[0060] In an exemplary embodiment of this application, step S100 further includes the following steps:

[0061] S101: Receives control commands from the vehicle controller to switch the battery high-voltage status.

[0062] S102: Control each of the relays to switch states according to the control command. When the relays cannot close or open normally, obtain the state of each relay, the current high voltage state of the battery, and the high voltage state of the target battery to be switched.

[0063] It should be noted that the abnormal battery high-voltage state transition includes abnormalities occurring during relay closing or opening, as well as changes in vehicle controller commands during relay operation. Therefore, in another embodiment of the present invention, step S102 may also involve controlling each of the relays to switch states according to the control command, and when the control command changes during relay operation, acquiring the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be transitioned to.

[0064] Specifically, the battery management system (BMS) issues corresponding relay commands based on the current actual high-voltage state and the calculated target state to control each relay to perform its corresponding action. For example, if the current battery high-voltage state is DC rechargeable, and the BMS receives a control command from the vehicle controller requesting a reduction in high voltage, the current battery high-voltage state needs to transition from DC rechargeable to a no-power-output state. The BMS controls the relays to switch states according to the control command. Please refer to [link to relevant documentation]. Figure 3 As shown, Figure 3 This refers to the relay commands that switch between different high-voltage states of the battery. When the high-voltage state switches from DC-chargeable to no-power output, the bDCdown command must be executed first (i.e., disconnecting the fast-charging negative relay and then the fast-charging positive relay), followed by the bDRVdown command (i.e., disconnecting the main positive relay and then the main negative relay). The relay action sequence represented by the relay operation commands is shown in Table 2.

[0065] Table 2

[0066] Relay control commands Relay operation sequence bDRVup Close main negative → Close precharge → Close main positive → Disconnect precharge bDRVup (only closes the main positive) Closed main positive bDRVdown Disconnect the primary positive → Disconnect the primary negative bDRVdown (Only disconnects the main positive channel) Disconnect the main positive bDCup Close fast charge positive → Close fast charge negative bDCdown Disconnect fast charging negative → Disconnect fast charging positive bDCdown (Break the main body) Disconnect fast charging negative → Disconnect fast charging positive → Disconnect main negative

[0067] When an abnormality occurs during the closing or opening of the relay, or when the vehicle controller command changes during the relay operation, the battery management system obtains the status of each relay, the current high-voltage status of the battery, and the high-voltage status of the target battery to be switched. It should be noted that, in this embodiment, the battery management system can obtain the actual status of each relay by receiving the signal feedback of the relay diagnostic results.

[0068] Next, step S200 is executed, which determines the operating condition category to which the battery high voltage state jump belongs based on the states of each relay, the current battery high voltage state, and the target battery high voltage state to be jumped.

[0069] In an exemplary embodiment of this application, if the current high voltage state of the battery is a DC charging state or a driveable state, and the target high voltage state of the battery to be switched to is a DC charging preheating state and the main relay does not operate, or the current high voltage state of the battery is a DC charging state and the target high voltage state of the battery to be switched to is a driveable state, or the current high voltage state of the battery is a driveable state and the target high voltage state of the battery to be switched to is a DC charging state, then the battery state switch belongs to the first operating condition, and all other cases belong to the second operating condition.

[0070] For details, please refer to Figure 4 As shown, if the current battery high-voltage state transitions to the first operating condition, the battery management system will revert the battery high-voltage state to a driveable state. If the battery high-voltage state transitions to the second operating condition, the battery management system will revert the battery high-voltage state to a no-power output state. Please refer to [link / reference]. Figure 3 As shown in Table 2, when the battery high-voltage state transition occurs and the relay fails to close or open normally, or when the vehicle controller command changes, causing the battery high-voltage state to need to revert, for example, during the transition from DC rechargeable state to DC charging preheating state, the bDRVdown command is executed. The corresponding relay action is to disconnect the main positive relay. If the vehicle controller command changes during the current detection phase before disconnecting the main positive relay, and the main relay has not yet activated, the battery high-voltage state reverts to the driveable state. If it is determined during the main positive relay disconnection phase that the main relay cannot be disconnected, the battery high-voltage state reverts to the no-power output state.

[0071] Finally, step S300 is executed, which controls each of the relays to switch states according to the operating condition category of the battery high voltage state, and returns the battery high voltage state to the driveable state or the no-power output state.

[0072] Specifically, when an abnormality occurs during the closing or opening of the relay, or when the vehicle controller command changes during relay operation, if the current battery high-voltage state jump belongs to the first operating condition, it needs to return to the drivable state. The battery management system controls the main relay to close, the pre-charge relay and the fast-charge relay to open, and returns the battery high-voltage state to the drivable state. Since the original main relay state for the battery high-voltage state jump in the first operating condition is that both the main positive relay and the main negative relay are closed, and the pre-charge relay is open, when an abnormality occurs during the jump, the relay only needs to execute the command to open the fast-charge relay, and then return the battery high-voltage state to the drivable state, so that the battery high-voltage state can be consistent with the actual state of the relay. Other abnormal battery high-voltage state jumps belong to the second operating condition, which requires returning to the no-power output state. The battery management system controls the relay to execute a full disconnect command, that is, controls the main relay, the pre-charge relay and the fast-charge relay to open, and returns the battery high-voltage state to the no-power output state, so that the battery high-voltage state can also be consistent with the actual state of the relay.

[0073] Based on the same inventive concept, please refer to Figure 6 As shown, another embodiment of the present invention also provides a relay control system 11 for abnormal battery state transition, comprising:

[0074] The acquisition module 111 is used to acquire the status of each relay in the battery charging and discharging circuit, the current battery high voltage status, and the target battery high voltage status to be switched when the battery high voltage status jumps abnormally.

[0075] The determination module 112 is used to determine the operating condition category to which the battery high voltage state jump belongs based on the states of each relay, the current battery high voltage state, and the target battery high voltage state to be jumped.

[0076] Control module 113 is used to control each of the relays to switch states according to the operating condition category of the battery high voltage state, and to return the battery high voltage state to the driveable state or the no-power output state.

[0077] It should be noted that the relay control system 11 for abnormal battery state transition includes the relay control method for abnormal battery state transition described in any of the above embodiments. Since the relay control system 11 for abnormal battery state transition provided in this embodiment belongs to the same inventive concept as the relay control method for abnormal battery state transition provided in any of the above embodiments, it has at least the same beneficial effects, and will not be described in detail here.

[0078] Based on the same inventive concept, please refer to Figure 7As shown, another embodiment of the present invention also provides an electronic device 1, which may include a memory 12, a processor 13 and a bus, and may also include a computer program stored in the memory 12 and executable on the processor 13, such as a relay control program for abnormal battery state transition.

[0079] The memory 12 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 12 can be an internal storage unit of the electronic device 1, such as a portable hard drive. In other embodiments, the memory 12 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electronic device 1. Furthermore, the memory 12 can include both internal and external storage units of the electronic device 1. The memory 12 can be used not only to store application software and various types of data installed on the electronic device 1, such as relay control codes for abnormal battery status transitions, but also to temporarily store data that has been output or will be output.

[0080] In some embodiments, the processor 13 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 13 is the control unit of the electronic device 1, connecting various components of the electronic device 1 via various interfaces and lines. It executes programs or modules stored in the memory 12 (e.g., relay control programs for abnormal battery status transitions) and calls data stored in the memory 12 to perform various functions and process data in the electronic device 1.

[0081] The processor 13 executes the operating system of the electronic device 1 and various installed applications. The processor 13 executes the applications to implement the steps in the relay control method for abnormal battery state transition described above.

[0082] For example, the computer program may be divided into one or more modules, which are stored in the memory 12 and executed by the processor 13 to complete this application. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in the electronic device 1. For example, the computer program may be divided into an acquisition module 111, a determination module 112, and a control module 113.

[0083] The integrated unit implemented as a software functional module described above can be stored in a computer-readable storage medium, which can be non-volatile or volatile. The software functional module, stored in the storage medium, includes several instructions to cause a computer device (which may be a personal computer, computer equipment, or network device, etc.) or processor to execute some functions of the relay control method for abnormal battery state transitions described in the various embodiments of this application.

[0084] In summary, please refer to Figure 5 As shown, this invention provides a relay control method for abnormal battery state transitions. The method includes, when an abnormal battery high-voltage state transition occurs, acquiring the states of each relay in the battery charging / discharging circuit, the current battery high-voltage state, and the target battery high-voltage state to be transitioned to. Based on the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be transitioned to, determining the operating condition category to which the battery high-voltage state transition belongs, controlling each relay to switch states according to the operating condition category, and reverting the battery high-voltage state to a driveable state or a no-power output state. This relay control method for abnormal battery state transitions does not always revert to a no-power output state when the battery high-voltage state transitions abnormally; instead, it flexibly determines the reverting battery high-voltage state based on different operating condition categories, improving user experience and increasing relay lifespan. Furthermore, after the abnormal battery high-voltage state transition is resolved, the actual relay state remains consistent with the battery high-voltage state, thereby ensuring the accuracy of information interaction with other functions or controllers.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A relay control method for abnormal battery state transition, characterized in that, include: When the battery high voltage state jumps abnormally, the state of each relay in the battery charging and discharging circuit, the current battery high voltage state, and the target battery high voltage state to be jumped are obtained. The battery high voltage state includes no power output state, driveable state, AC charging state, DC charging state, and DC charging preheating state. The battery charging and discharging circuit is equipped with a main relay, a precharge relay, and a fast charge relay. Based on the status of each relay, the current high-voltage status of the battery, and the target high-voltage status of the battery to be switched, determine the operating condition category to which the high-voltage status switch belongs. According to the operating condition category to which the battery high voltage state jumps, the control of each relay is to switch the state and return the battery high voltage state to the driveable state or the no-power output state. The step of determining the operating condition category to which the battery high-voltage state jump belongs based on the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes: The first operating condition is defined as follows: when the states of each relay, the current high-voltage state of the battery, and the high-voltage state of the target battery to be switched to meet any of the following conditions, the second operating condition is defined as follows: The current battery high-voltage state is either DC charging or driveable, while the target battery high-voltage state to be switched to is DC charging preheating and the main relay is not activated; or The current battery high-voltage state is DC-chargeable, and the target battery high-voltage state to be switched to is driveable; or The current high voltage state of the battery is driveable, and the high voltage state of the target battery to be switched to is DC chargeable. The step of controlling each relay to switch states according to the operating condition category of the battery high-voltage state, and returning the battery high-voltage state to a driveable state or a no-power output state, includes: When the battery high-voltage state switches to the first operating condition, the main relay is closed, the pre-charge relay and the fast-charge relay are opened, and the battery high-voltage state is returned to the driveable state.

2. The relay control method for abnormal battery state transition according to claim 1, characterized in that, When the battery high-voltage state jumps abnormally, the acquisition of the states of each relay in the battery charging and discharging circuit, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes: Receive control commands from the vehicle controller to switch the battery high-voltage status; According to the control command, the relays are controlled to switch states. When the relays cannot close or open normally, the states of each relay, the current high voltage state of the battery, and the high voltage state of the target battery to be switched are obtained.

3. The relay control method for abnormal battery state transition according to claim 1, characterized in that, When the battery high-voltage state transitions abnormally, the acquisition of the status of each relay, the current battery high-voltage state, and the target battery high-voltage state to be transitioned to includes: Receive control commands from the vehicle controller to switch the battery high-voltage status; The control commands control each of the relays to switch states. When the control commands change during the operation of the relays, the state of each relay, the current high voltage state of the battery, and the high voltage state of the target battery to be switched are obtained.

4. The relay control method for abnormal battery state transition according to claim 1, characterized in that, The step of controlling each of the relays to switch states according to the operating condition category to which the battery high-voltage state belongs, and returning the battery high-voltage state to a driveable state or a no-power output state, includes: When the battery high-voltage state switches to the second operating condition, the main relay, the pre-charge relay and the fast-charge relay are all disconnected, and the battery high-voltage state is returned to the no-power output state.

5. A relay control method for abnormal battery state transition, characterized in that, include: When the battery high voltage state jumps abnormally, the state of each relay in the battery charging and discharging circuit, the current battery high voltage state, and the target battery high voltage state to be jumped are obtained. The battery high voltage state includes no power output state, driveable state, AC charging state, DC charging state, and DC charging preheating state. The battery charging and discharging circuit is equipped with a main relay, a precharge relay, and a fast charge relay. Based on the status of each relay, the current high-voltage status of the battery, and the target high-voltage status of the battery to be switched, determine the operating condition category to which the high-voltage status switch belongs. According to the operating condition category to which the battery high voltage state jumps, the control of each relay is to switch the state and return the battery high voltage state to the driveable state or the no-power output state. The step of determining the operating condition category to which the battery high-voltage state jump belongs based on the states of each relay, the current battery high-voltage state, and the target battery high-voltage state to be jumped includes: The first operating condition is defined as follows: when the states of each relay, the current high-voltage state of the battery, and the high-voltage state of the target battery to be switched to meet any of the following conditions, the second operating condition is defined as follows: The current battery high-voltage state is either DC charging or driveable, while the target battery high-voltage state to be switched to is DC charging preheating and the main relay is not activated; or The current battery high-voltage state is DC-chargeable, and the target battery high-voltage state to be switched to is driveable; or The current high voltage state of the battery is driveable, and the high voltage state of the target battery to be switched to is DC chargeable. The step of controlling each relay to switch states according to the operating condition category of the battery high-voltage state, and returning the battery high-voltage state to a driveable state or a no-power output state, includes: When the battery high-voltage state switches to the second operating condition, the main relay, the pre-charge relay and the fast-charge relay are all disconnected, and the battery high-voltage state is returned to the no-power output state.

6. A relay control system for abnormal battery state transition, characterized in that, The system includes: The acquisition module is used to acquire the status of each relay in the battery charging and discharging circuit, the current battery high voltage status, and the target battery high voltage status to be jumped when the battery high voltage status jumps abnormally. The battery high voltage status includes no power output status, driveable status, AC charging status, DC charging status, and DC charging preheating status. The battery charging and discharging circuit is equipped with a main relay, a precharge relay, and a fast charge relay. The determining module is used to determine the operating condition category to which the battery high voltage state jump belongs based on the states of each relay, the current battery high voltage state, and the target battery high voltage state to be jumped. Specifically, if any of the following conditions are met, it belongs to the first operating condition; otherwise, it belongs to the second operating condition: the current battery high voltage state is in a DC charging or driving state, and the target battery high voltage state to be jumped is in a DC charging preheating state and the main relay is not activated; or the current battery high voltage state is in a DC charging state, and the target battery high voltage state to be jumped is in a driving state; or the current battery high voltage state is in a driving state, and the target battery high voltage state to be jumped is in a DC charging state. The control module is used to control the state switching of each relay according to the operating condition category to which the battery high voltage state jumps, and to return the battery high voltage state to the driveable state or the no-power output state. Specifically, when the battery high voltage state jumps to the first operating condition, the main relay is closed, the pre-charge relay and the fast-charge relay are opened, and the battery high voltage state is returned to the driveable state.

7. An electronic device, characterized in that, The electronic device includes: One or more processors; A storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement a relay control method for abnormal battery state transition as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed by the computer's processor, causes the computer to perform a relay control method for abnormal battery state transition as described in any one of claims 1 to 5.

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