Battery pack high-voltage loop control method, device, equipment, medium and program product

Abstract

The invention discloses a battery pack high-voltage loop control method and device, electronic equipment and a storage medium. The method comprises the steps of executing BMS inspection operation to obtain an inspection result when high-voltage and large-current anomalies are not detected in the normal operation process of a whole vehicle; determining a control signal according to the inspection result; when the control signal is a normal power-off instruction and it is detected that the current drops to a preset current limit value of the current of the battery pack, a main positive relay in the high-voltage loop is switched off; when it is detected that the high voltage is not disconnected, the active and passive integrated fuse in the high-voltage loop is actively disconnected. According to the method, the problem of a high-voltage large-current protection blind area can be solved, and a whole-system BMS active protection function is added on the basis of the original BDU (high-voltage execution unit) space and cost.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and specifically to a battery pack high-voltage circuit control method, device, electronic device, readable storage medium and computer program product. Background Art

[0002] At present, in the existing high-voltage circuit of the vehicle battery pack, the high-voltage circuit is a key module. Under the control of the BMS, it bears the important responsibilities of high-voltage switching and active / passive safety protection. In the existing technology, the high-voltage circuit includes core components such as the main relay, pre-charge relay, pre-charge resistor and fuse. In the actual application scenario of the supercharged battery pack, there is a blind spot between the fuse and the relay. When an abnormally large current appears in the circuit, the current has exceeded the disconnection capacity of the relay, but the fuse fails to burn out in time, which may cause the relay to explode due to being unable to withstand the overload current, causing serious accidents such as explosion, causing irreparable damage to the battery pack and even the entire system. Summary of the Invention

[0003] In view of the above problems, the present application provides a battery pack high-voltage circuit control method, device, electronic device, readable storage medium and computer program product, which can solve the problem that the fuse fails to burn out in time, resulting in the explosion of the relay due to the inability to withstand the overload current and other serious accidents.

[0004] In a first aspect, the present application provides a battery pack high-voltage circuit control method, comprising:

[0005] When no abnormal high voltage or large current is detected during normal operation of the vehicle, the BMS inspection operation is performed to obtain the inspection result;

[0006] determining a control signal according to the inspection result;

[0007] When the control signal is a normal power-off instruction and it is detected that the current drops to a preset current limit of the battery pack current, the main positive relay in the high-voltage circuit is disconnected;

[0008] When it is detected that the high voltage is not disconnected, the active and passive integrated fuses in the high voltage circuit are actively disconnected.

[0009] In the above technical solution, the method can realize multi-stage active and passive safety protection based on active and passive integrated fuses in various scenarios such as high voltage and abnormally large current scenarios and normal power-off scenarios, thereby ensuring that the high voltage circuit can be disconnected more reliably.

[0010] In some embodiments, when no high voltage abnormality or high current abnormality is detected during normal operation of the vehicle, before performing the BMS inspection operation to obtain the inspection result, the method further includes:

[0011] When receiving the vehicle key power-on signal, the BMS self-test operation is performed to obtain the self-test result;

[0012] When the self-test result shows that there is no abnormal fault, closing the pre-charge relay in the high-voltage circuit;

[0013] When it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage, the main positive relay in the high-voltage circuit is closed and the pre-charge relay is opened.

[0014] In the above technical solution, this method can ensure the reliable closure of the high-voltage circuit under safe conditions through a systematic power-on process and multi-stage relay control method, laying the foundation for the active and passive protection mechanism.

[0015] In some embodiments, the method further comprises:

[0016] When the self-test result indicates an abnormal fault, or when it is detected that the external voltage reaches a preset voltage limit of the battery pack voltage, the BMS is controlled to perform a fault reporting operation.

[0017] In the above technical solution, the method can achieve accurate identification and risk isolation of high-voltage system anomalies through rapid fault response and active reporting mechanism, thereby ensuring the safe operation of vehicles or equipment.

[0018] In some embodiments, the method further comprises:

[0019] When abnormal high voltage and abnormal large current are detected during the normal operation of the vehicle, the active and passive integrated fuses in the high voltage circuit are triggered to be passively disconnected.

[0020] In the above technical solution, when extreme abnormalities occur in the high-voltage circuit (such as short circuit, overload), this method can achieve millisecond-level rapid current interruption through the passive triggering mechanism of the active and passive integrated fuse, thereby preventing thermal runaway and fire risks, and serving as the last line of defense for BMS active control.

[0021] In some embodiments, the method further comprises:

[0022] When the control signal is an emergency power-off command and it is detected that the current drops to a preset current limit of the battery pack current or the waiting time reaches a preset time threshold, the main positive relay is disconnected, and the active and passive integrated fuses in the high-voltage circuit are actively disconnected when it is detected that the high voltage is not disconnected are executed;

[0023] When the control signal is a safety signal, the active and passive integrated fuses in the high-voltage circuit are actively disconnected;

[0024] When the control signal is a self-test fault signal, a vehicle power-off request is output, and the active and passive integrated fuses in the high-voltage circuit are actively disconnected according to the vehicle power-off request.

[0025] In the above technical solution, this method can flexibly adapt to fault scenarios of different urgency through a hierarchical protection strategy driven by multiple types of control signals, ensuring that the high-voltage circuit is forced to be disconnected in the event of active control failure or extreme risks, while taking into account the system response efficiency and safety.

[0026] In a second aspect, the present application provides a battery pack high-voltage circuit control device, comprising:

[0027] The inspection unit is used to perform BMS inspection operations and obtain inspection results when no abnormal high voltage or large current is detected during the normal operation of the vehicle;

[0028] a determination unit, configured to determine a control signal according to the inspection result;

[0029] a first control unit, configured to disconnect a main positive relay in the high-voltage circuit when the control signal is a normal power-off instruction and when it is detected that the current drops to a preset current limit of the battery pack current;

[0030] The second control unit is used to disconnect the active and passive integrated fuses in the high-voltage circuit when it is detected that the high voltage is not disconnected.

[0031] In the above technical solution, the device can realize multi-stage active and passive safety protection based on active and passive integrated fuses in various scenarios such as high voltage and abnormally large current scenarios and normal power-off scenarios, thereby ensuring that the high-voltage circuit can be disconnected more reliably.

[0032] In some embodiments, the battery pack high-voltage circuit control device further includes:

[0033] A self-test unit is used to perform a BMS self-test operation to obtain a self-test result when a vehicle key power-on signal is received before performing a BMS patrol inspection operation to obtain a patrol inspection result;

[0034] a third control unit, configured to close a pre-charge relay in the high-voltage circuit when the self-test result indicates that there is no abnormal fault;

[0035] The fourth control unit is used to close the main positive relay in the high-voltage circuit and disconnect the pre-charge relay when it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage.

[0036] In the above technical solution, the device can ensure the reliable closure of the high-voltage circuit under safe conditions through a systematic power-on process and multi-stage relay control, laying the foundation for the active and passive protection mechanism.

[0037] In a third aspect, the present application provides an electronic device comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the battery pack high-voltage circuit control method described in any one of the first aspects.

[0038] In a fourth aspect, the present application provides a readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the battery pack high-voltage circuit control method described in any one of the first aspects is executed.

[0039] In a fifth aspect, the present application provides a computer program product, which includes a computer program. When the computer program is run by a processor, it executes the battery pack high-voltage circuit control method described in any one of the first aspects.

[0040] The beneficial effects of this application are: on the basis of the existing battery pack high-voltage circuit, the traditional fuse is eliminated, and the active and passive integrated fuse is used to replace the main negative relay, thereby improving the safety performance (achieved by adding active and passive integrated fuses), and reducing the cost and space of electrical components (achieved by eliminating traditional fuses and main negative relays), thereby solving the problem of high-voltage and high-current protection blind spots, and adding full-system BMS active protection functions based on the space and cost of the original BDU (high-voltage execution unit). BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 The existing electrical circuit diagram of the battery pack;

[0043] Figure 2 A novel electrical circuit diagram of a battery pack proposed in some embodiments of the present application;

[0044] Figure 3 This is a flow chart of a battery pack high-voltage circuit control method in some embodiments of the present application;

[0045] Figure 4 This is a schematic diagram of the high-voltage power-up process in some embodiments of the present application;

[0046] Figure 5 This is a schematic diagram of the high voltage power-down process in some embodiments of the present application;

[0047] Figure 6 This is a schematic structural diagram of a battery pack high-voltage circuit control device in some embodiments of the present application;

[0048] Figure 7 This is a schematic diagram of the structure of an electronic device in some embodiments of the present application. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces) unless otherwise clearly and specifically defined.

[0052] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] At present, the high voltage connection of battery pack is generally a hierarchical relationship of battery module (module) - BDU (high voltage execution unit) - high voltage output. Among them, BDU is a module that realizes high voltage on / off and active / passive safety protection through BMS control, which contains main relay, pre-charge relay, pre-charge resistor and fuse, etc. Figure 1 , Figure 1 An electrical schematic diagram of an existing battery pack is shown.

[0055] Normally, when the fuse in the high-voltage connection of the battery pack is matched with the supercharged battery pack (generally above 400A), there is a safety hazard of a blind spot when it matches the relay (generally when the current of 2000A to 3000A exceeds the disconnection capacity of the relay, but the fuse has not burned out in time, then serious accidents such as relay explosion may occur).

[0056] In response to the above technical problems, this application introduces the concept of active and passive integrated fuses (it can also be a combination of active disconnection + traditional insurance, etc.) to replace the fuses in the high-voltage circuit. Based on this, the embodiment of the application provides a new type of electrical circuit (such as Figure 2 ) and corresponding battery pack high voltage circuit control method.

[0057] based on Figure 2 As can be seen, the embodiment of this application eliminates the traditional fuse and uses an active and passive integrated fuse to replace the main negative relay. At the positive terminal, the fast-charge relay, main positive relay, pre-charge relay, and pre-charge resistor perform conventional on-off operations for the high voltage; at the negative terminal, the active and passive integrated fuse provides disconnection protection for the high voltage in abnormal situations.

[0058] It can be seen that the active and passive integrated fuse in the embodiment of the present application has two functions: one is to disconnect the high voltage by physical cutting off according to the command signal issued by the BMS (active function); the other is to disconnect the high voltage by physical cutting off according to the voltage difference signal formed by the abnormally large current (passive function).

[0059] This setting effectively solves the problem of high-voltage and high-current protection blind spots, and adds active protection functions to the entire BMS series based on the original BDU space and cost.

[0060] like Figure 3 As shown, some embodiments of the present application provide a battery pack high-voltage circuit control method, the battery pack high-voltage circuit control method comprising:

[0061] S101: When no abnormal high voltage or large current is detected during normal operation of the vehicle, a BMS inspection operation is performed to obtain an inspection result;

[0062] S102, determining a control signal according to the inspection result;

[0063] S103, when the control signal is a normal power-off instruction and it is detected that the current drops to a preset current limit of the battery pack current, disconnecting the main positive relay in the high-voltage circuit;

[0064] S104: When it is detected that the high voltage is not disconnected, the active and passive integrated fuses in the high voltage circuit are actively disconnected.

[0065] In some embodiments, this method adds three additional safety protection procedures compared to traditional electrical circuits: abnormally high current shutdown mode, shutdown mode upon receipt of a safety signal, and shutdown mode upon relay control failure. This safety protection process can better protect high voltage safety and avoid serious accidents such as short circuits, sparks, and electric shocks, while ensuring compliance with vehicle regulations.

[0066] In some embodiments, a normal power-off command refers to a power-off command issued by the entire vehicle under low-risk conditions. At this time, the BMS must wait until the current of the high-voltage circuit is lower than the limit, usually below 50A, before disconnecting the relay to avoid electric shock damage or adhesion of the relay.

[0067] In these embodiments, the method can achieve multi-stage active and passive safety protection based on active and passive integrated fuses in various scenarios such as high voltage and abnormally high current scenarios and normal power-off scenarios, thereby ensuring that the high voltage circuit can be disconnected more reliably.

[0068] To ensure normal power-on, in some embodiments, when no high voltage or high current anomaly is detected during normal vehicle operation, before performing a BMS inspection operation to obtain an inspection result, the method further includes:

[0069] When receiving the vehicle key power-on signal, the BMS self-test operation is performed to obtain the self-test result;

[0070] When the self-test result shows no abnormal fault, the pre-charge relay in the high-voltage circuit is closed;

[0071] When it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage, the main positive relay in the high-voltage circuit is closed and the pre-charge relay is opened.

[0072] In some embodiments, the high-voltage power-on process of this method reduces the closing action of the main negative relay compared to traditional electrical circuits (traditional electrical circuits require closing the main negative relay before closing the pre-charge relay), but it can still power on normally and meet the regulatory requirements of the entire vehicle.

[0073] In some embodiments, the external voltage rising to the limit generally refers to the detected external voltage reaching 90% to 98% of the battery pack voltage. Closing the main positive relay at this time can avoid the relay sticking due to the high current during the closing process.

[0074] In these embodiments, the method can ensure that the high-voltage circuit is reliably closed under safe conditions through a systematic power-on process and multi-stage relay control, laying the foundation for active and passive protection mechanisms.

[0075] In order to solve the problem of power-on failure, in some embodiments, the method further includes:

[0076] When the self-test result shows an abnormal fault, or when it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage, the BMS is controlled to perform a fault reporting operation.

[0077] For example, Figure 4 A schematic diagram of a high voltage power-on process is shown.

[0078] In these embodiments, the method can achieve accurate identification and risk isolation of high-voltage system anomalies through rapid fault response and active reporting mechanisms, thereby ensuring the safe operation of vehicles or equipment.

[0079] In order to address safety issues in extreme abnormal situations, in some embodiments, the method further includes:

[0080] When abnormal high voltage or large current is detected during normal operation of the vehicle, the active and passive integrated fuses in the high voltage circuit are triggered to passively disconnect.

[0081] In some embodiments, abnormally high voltage current generally refers to an abnormally high current exceeding 2000-3000A or above, that is, an abnormally high current beyond the disconnection capacity of the main positive relay, and the high voltage is disconnected by the active and passive integrated fuse (abnormally high current signal).

[0082] In these embodiments, when an extreme abnormality occurs in the high-voltage circuit (such as a short circuit or overload), the method can achieve millisecond-level rapid current interruption through the passive triggering mechanism of the active and passive integrated fuse, thereby preventing thermal runaway and fire risks, and serving as the last safety line of defense for BMS active control.

[0083] In order to solve the active safety protection problem in different scenarios, in some embodiments, the method further includes:

[0084] When the control signal is an emergency power-off command and it is detected that the current drops to the preset current limit of the battery pack current or the waiting time reaches the preset time threshold, the main positive relay is disconnected, and when it is detected that the high voltage is not disconnected, the active and passive integrated fuses in the high voltage circuit are actively disconnected;

[0085] When the control signal is a safety signal, the active and passive integrated fuses in the high-voltage circuit are actively disconnected;

[0086] When the control signal is a self-test fault signal, a vehicle power-off request is output, and the active and passive integrated fuses in the high-voltage circuit are actively disconnected according to the vehicle power-off request.

[0087] In some embodiments, an emergency power-off command refers to a power-off command issued by the entire vehicle under medium-risk conditions. At this time, the BMS will forcibly disconnect the relay within a limited time, usually within 200 mm.

[0088] In some embodiments, a safety signal (such as a collision signal) is generated when the vehicle is involved in an extreme safety incident, such as a collision. In this case, the battery pack's high voltage output must be quickly disconnected to ensure personal safety. This is done directly by the active and passive integrated fuses (with a command signal from the BMS). This process can also be further controlled by the BMS to disconnect the main positive relay, effectively disconnecting both the positive and negative poles.

[0089] In some embodiments, the self-test fault signal is a signal triggered by a relay control failure, etc. When the BMS control relay fails to power off, it is considered that a relay failure, relay contact or adhesion has occurred. Therefore, the electrical circuit of this method disconnects the high voltage through active and passive integrated fuses (BMS sends a command signal), thereby resolving the problem that traditional high-voltage circuits can only report faults but cannot disconnect the high voltage.

[0090] For example, Figure 5 A schematic diagram of a high voltage power-off process is shown.

[0091] In these embodiments, the method can flexibly adapt to fault scenarios of different urgency through a hierarchical protection strategy driven by multiple types of control signals, ensuring that the high-voltage circuit is forced to be disconnected in the event of active control failure or extreme risk, while taking into account system response efficiency and safety.

[0092] Figure 6 The schematic diagram of the structure of a battery pack high voltage circuit control device is shown. It should be understood that the device is Figure 1 The method executed in the embodiment corresponds to the embodiment, and the steps involved in the aforementioned method can be executed. The specific functions and effects of the device can be found in the description above. To avoid repetition, detailed description is appropriately omitted here.

[0093] The battery pack high voltage circuit control device includes:

[0094] The inspection unit 210 is configured to perform a BMS inspection operation to obtain an inspection result when no abnormal high voltage or abnormal large current is detected during normal operation of the vehicle;

[0095] A determination unit 220, configured to determine a control signal according to the inspection result;

[0096] The first control unit 230 is configured to disconnect the main positive relay in the high-voltage circuit when the control signal is a normal power-off instruction and the current is detected to have dropped to a preset current limit of the battery pack current;

[0097] The second control unit 240 is configured to disconnect the active and passive integrated fuses in the high-voltage circuit when detecting that the high voltage is not disconnected.

[0098] In some embodiments, the battery pack high voltage circuit control device further includes:

[0099] The self-test unit 250 is configured to perform a BMS self-test operation to obtain a self-test result upon receiving a vehicle key power-on signal before performing a BMS inspection operation to obtain an inspection result;

[0100] The third control unit 260 is configured to close the pre-charge relay in the high-voltage circuit when the self-test result shows no abnormal fault;

[0101] The fourth control unit 270 is configured to close the main positive relay in the high-voltage circuit and disconnect the pre-charge relay when it is detected that the external voltage reaches a preset voltage limit of the battery pack voltage.

[0102] In some embodiments, the battery pack high voltage circuit control device further includes:

[0103] The fifth control unit 280 is used to control the BMS to perform a fault reporting operation when an abnormal fault is found in the self-test result or when it is detected that the external voltage reaches a preset voltage limit of the battery pack voltage.

[0104] In some embodiments, the battery pack high voltage circuit control device further includes:

[0105] The second control unit 240 is further configured to trigger the passive disconnection of the active and passive integrated fuses in the high-voltage circuit when abnormal high voltage and abnormal large current are detected during normal operation of the vehicle.

[0106] In some embodiments, the second control unit 240 is further configured to disconnect the main positive relay when the control signal is an emergency power-off command and it is detected that the current drops to a preset current limit of the battery pack current or the waiting time reaches a preset time threshold, and to actively disconnect the active and passive integrated fuses in the high-voltage circuit when it is detected that the high voltage is not disconnected;

[0107] The second control unit 240 is further configured to actively disconnect the active and passive integrated fuses in the high-voltage circuit when the control signal is a safety signal;

[0108] The second control unit 240 is further configured to output a vehicle power-off request when the control signal is a self-test fault signal, and actively disconnect the active and passive integrated fuses in the high-voltage circuit according to the vehicle power-off request.

[0109] like Figure 7 As shown, the present application provides an electronic device 300, which includes a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other through a communication bus 303 and / or other forms of connection mechanisms (not marked). The memory 302 stores a computer program executable by the processor 301. When the computing device is running, the processor 301 executes the computer program to perform the method in any of the aforementioned optional implementations.

[0110] The present application provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium. When the computer program is executed by a processor, the method in any of the aforementioned optional implementations is executed.

[0111] Among them, the computer-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 storage, flash memory, magnetic disk or optical disk.

[0112] The present application provides a computer program product, which includes computer programmability. When the computer program is executed by a processor, the method in any of the aforementioned optional implementations is executed.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pack high voltage circuit control method, characterized in that: include: When no abnormal high voltage or large current is detected during normal operation of the vehicle, the BMS inspection operation is performed to obtain the inspection result; determining a control signal according to the inspection result; When the control signal is a normal power-off instruction and it is detected that the current drops to a preset current limit of the battery pack current, the main positive relay in the high-voltage circuit is disconnected; When it is detected that the high voltage is not disconnected, the active and passive integrated fuses in the high voltage circuit are actively disconnected.

2. The battery pack high voltage circuit control method according to claim 1, characterized in that: When no high voltage abnormality or large current abnormality is detected during the normal operation of the vehicle, before performing the BMS inspection operation to obtain the inspection result, the method further includes: When receiving the vehicle key power-on signal, the BMS self-test operation is performed to obtain the self-test result; When the self-test result shows that there is no abnormal fault, closing the pre-charge relay in the high-voltage circuit; When it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage, the main positive relay in the high-voltage circuit is closed and the pre-charge relay is opened.

3. The battery pack high voltage circuit control method according to claim 2, characterized in that: The method further comprises: When the self-test result indicates an abnormal fault, or when it is detected that the external voltage reaches a preset voltage limit of the battery pack voltage, the BMS is controlled to perform a fault reporting operation.

4. The battery pack high voltage circuit control method according to claim 1, characterized in that: The method further comprises: When abnormal high voltage and abnormal large current are detected during the normal operation of the vehicle, the active and passive integrated fuses in the high voltage circuit are triggered to be passively disconnected.

5. The battery pack high voltage circuit control method according to claim 1, characterized in that: The method further comprises: When the control signal is an emergency power-off command and it is detected that the current drops to a preset current limit of the battery pack current or the waiting time reaches a preset time threshold, the main positive relay is disconnected, and the active and passive integrated fuses in the high-voltage circuit are actively disconnected when it is detected that the high voltage is not disconnected are executed; When the control signal is a safety signal, the active and passive integrated fuses in the high-voltage circuit are actively disconnected; When the control signal is a self-test fault signal, a vehicle power-off request is output, and the active and passive integrated fuses in the high-voltage circuit are actively disconnected according to the vehicle power-off request.

6. A battery pack high voltage circuit control device, characterized in that: The battery pack high-voltage circuit control device includes: The inspection unit is used to perform BMS inspection operations and obtain inspection results when no abnormal high voltage or large current is detected during the normal operation of the vehicle; a determination unit, configured to determine a control signal according to the inspection result; a first control unit, configured to disconnect a main positive relay in the high-voltage circuit when the control signal is a normal power-off instruction and when it is detected that the current drops to a preset current limit of the battery pack current; The second control unit is used to disconnect the active and passive integrated fuses in the high-voltage circuit when it is detected that the high voltage is not disconnected.

7. The battery pack high voltage circuit control device according to claim 6, characterized in that: The battery pack high-voltage circuit control device further includes: A self-test unit is used to perform a BMS self-test operation to obtain a self-test result when a vehicle key power-on signal is received before performing a BMS patrol inspection operation to obtain a patrol inspection result; a third control unit, configured to close a pre-charge relay in the high-voltage circuit when the self-test result indicates that there is no abnormal fault; The fourth control unit is used to close the main positive relay in the high-voltage circuit and disconnect the pre-charge relay when it is detected that the external voltage reaches the preset voltage limit of the battery pack voltage.

8. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the battery pack high-voltage circuit control method according to any one of claims 1 to 5.

9. A readable storage medium, characterized in that The readable storage medium stores a computer program, and when the computer program is executed by the processor, the battery pack high-voltage circuit control method according to any one of claims 1 to 5 is executed.

10. A computer program product, characterized in that The computer program product includes a computer program, and when the computer program is executed by a processor, the battery pack high-voltage circuit control method according to any one of claims 1 to 5 is executed.

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