A high voltage isolation method, device, equipment and storage medium for an electric cabinet

Abstract

The present application discloses a high-voltage isolation method, device, equipment and storage medium for an electrical cabinet, the method comprising: receiving a high-voltage isolation instruction of an electrical cabinet of an energy management system, the high-voltage isolation instruction indicating a target electrical cabinet to be isolated; based on the high-voltage processing state of an energy storage system detected, in combination with the high-voltage isolation instruction, determining a first high-voltage isolation result of the target electrical cabinet; based on the first high-voltage isolation result, providing feedback to the energy management system.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of battery technology, and in particular to a high-voltage isolation method, device, equipment and storage medium for an electrical cabinet. Background Art

[0002] Faced with the dual pressures of energy consumption and environmental pollution, countries around the world have begun to widely develop new energy sources. The advantages of energy storage systems based on power electronic conversion in terms of power density, economy, control flexibility, etc. are becoming increasingly apparent, and energy storage systems are being used more and more. In the field of large-scale energy storage, battery cells are connected in series and parallel to form modules, modules are connected in series and parallel to form battery packs (i.e., electric cabinets), battery packs are further connected in series and parallel to form battery clusters, and multiple battery clusters are connected in parallel through buses to form energy storage systems.

[0003] At present, when a problem or failure occurs in a battery pack in an energy storage system, the high voltage of the energy storage system or the battery cluster where the faulty battery pack is located is powered off by controlling a control unit or an energy storage converter in the energy storage system.

[0004] However, in the above method, when a faulty battery pack appears in the energy storage system, the entire energy storage system needs to be powered down at high voltage, including powering down the non-faulty battery packs in the energy storage system at high voltage, thus affecting the operating efficiency of the energy storage system. Summary of the invention

[0005] In view of this, embodiments of the present application provide a high-voltage isolation method, device, equipment and storage medium for an electrical cabinet.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a high-voltage isolation method for an electrical cabinet, which is applied to a battery management unit. The method includes: receiving a high-voltage isolation instruction of an electrical cabinet of an energy management system, wherein the high-voltage isolation instruction indicates a target electrical cabinet to be isolated; based on detecting the high-voltage processing status of an energy storage system, combined with the high-voltage isolation instruction, determining a first high-voltage isolation result of the target electrical cabinet; and providing feedback to the energy management system based on the first high-voltage isolation result.

[0008] It is understandable that when a target electric cabinet to be isolated appears in the energy storage system, the battery management unit determines whether the target electric cabinet executes the high-voltage isolation instruction according to the different high-voltage processing states of the energy storage system and the high-voltage isolation instruction. When the target electric cabinet in the energy storage system is in different high-voltage processing states, the battery management unit can respond to the high-voltage isolation instruction according to the different high-voltage processing states to achieve high-voltage isolation of the target electric cabinet under the normal operation of the energy storage system, thereby effectively improving the operating efficiency of the energy storage system.

[0009] In some embodiments, the method of determining a first high-voltage isolation result of a target electrical cabinet based on the detected high-voltage processing state of the energy storage system in combination with a high-voltage isolation instruction includes: when it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, responding to the high-voltage isolation instruction, isolating the target electrical cabinet, and determining the first high-voltage isolation result of the target electrical cabinet, wherein the non-high-voltage power-off state includes a high-voltage-not-on state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; when it is detected that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, not responding to the high-voltage isolation instruction, executing the high-voltage power-off process, and determining the first high-voltage isolation result of the target electrical cabinet based on the high-voltage power-off result.

[0010] It is understandable that the detected high-voltage processing state of the energy storage system is divided into a non-high-voltage power-off state and a high-voltage power-off state. When the energy storage system is in a non-high-voltage power-off state, it responds to a high-voltage isolation instruction. When the energy storage system is in a high-voltage power-off state, it does not respond to a high-voltage isolation instruction and continues to execute the high-voltage power-off process without interrupting the original high-voltage power-off process, thereby achieving the purpose of high-voltage isolation, thereby effectively improving the operating efficiency of the energy storage system.

[0011] In some embodiments, when it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, responding to a high-voltage isolation instruction, isolating the target electrical cabinet, and determining a first high-voltage isolation result of the target electrical cabinet, includes: when it is detected that the non-high-voltage power-off state of the energy storage system is the non-high-voltage state, if a high-voltage power-on instruction of the energy storage system is received, responding to the high-voltage power-on instruction, high-voltage powering on the non-target electrical cabinet of the energy storage system, prohibiting the target electrical cabinet from high-voltage power-on, isolating the target electrical cabinet, and determining that the first high-voltage isolation result of the target electrical cabinet is successful; when it is detected that the non-high-voltage power-off state of the energy storage system is in the high-voltage power-on process, isolating the target electrical cabinet that has not completed high-voltage power-on, and determining that the first high-voltage isolation result of the target electrical cabinet is successful; when it is detected that the non-high-voltage power-off state of the energy storage system is the high-voltage power-on completion state, based on the maximum charge and discharge energy of the energy storage system and the detected total current, responding to the high-voltage isolation instruction, determining whether to isolate the target electrical cabinet, and determining the first high-voltage isolation result of the target electrical cabinet.

[0012] It is understandable that the non-high-voltage power-off state of the energy storage system is further subdivided into three categories: non-high-voltage state, high-voltage process, and high-voltage completion state. The battery management unit can respond to high-voltage isolation instructions in a classified manner based on the different high-voltage states detected for the energy storage system. When the energy storage system is not in a high-voltage state, no high-voltage instruction is sent to the target electrical cabinet, and the identified target electrical cabinet is excluded in advance so that it does not participate in the high-voltage power-on process of the energy storage system, effectively improving the safety and effectiveness of the operation of the energy storage system. When the energy storage system is in a high-voltage completion state, based on the detected electric energy of the energy storage system at the current moment, when the electric energy is within a safe range, it responds to the high-voltage isolation instruction, effectively improving the safety of the operation of the energy storage system.

[0013] In some embodiments, based on the maximum charge and discharge energy of the energy storage system and the detected total current, responding to a high-voltage isolation instruction, determining whether to isolate the target electrical cabinet, and determining a first high-voltage isolation result of the target electrical cabinet, includes: while limiting the maximum allowable charge and discharge energy of the energy storage system to a first value, after receiving the high-voltage isolation instruction for a first preset time, detecting the total current of the energy storage system and determining the minimum operating current of the energy storage system; if the total current is continuously less than the minimum operating current within a second preset time, responding to the high-voltage isolation instruction, performing a high-voltage power-off process on the target electrical cabinet to achieve isolation, and determining the first high-voltage isolation result of the target electrical cabinet; if the total current is not continuously less than the minimum operating current within the second preset time, determining that the first high-voltage isolation result of the target electrical cabinet is a failure.

[0014] It can be understood that when the high-voltage power-on of the energy storage system is completed, the battery management unit clarifies the timing of sending the high-voltage instruction by limiting the maximum allowable charging and discharging energy of the energy storage system and judging the minimum energy that the energy storage system can maintain normal operation; when the total energy of the energy storage system is less than the minimum energy for the normal operation of the energy storage system, the high-voltage isolation cabinet sends the high-voltage instruction, which improves the safety of the high-voltage isolation action of the cabinet.

[0015] In some embodiments, the response to the high-voltage isolation instruction, the high-voltage power-off process is performed on the target electrical cabinet to achieve isolation, and the first high-voltage isolation result of the target electrical cabinet is determined, including: responding to the high-voltage isolation instruction, if the high-voltage power-off of the target electrical cabinet is successfully performed within the third preset time after the isolation of the target electrical cabinet, then the second high-voltage isolation result of the target electrical cabinet is determined to be success; if the high-voltage power-off of the target electrical cabinet fails within the third preset time after the isolation of the target electrical cabinet, then the second high-voltage isolation result of the target electrical cabinet is determined to be failure; based on the second high-voltage isolation result of the target electrical cabinet, the first high-voltage isolation result is determined.

[0016] It is understandable that setting a third preset time, judging the high voltage power-off status of the target cabinet within the third preset time, and confirming whether the high voltage power-off of the target cabinet is successful improves the accuracy of the high voltage isolation result of the target cabinet.

[0017] In some embodiments, the determining of the first high-voltage isolation result based on the second high-voltage isolation result of the target electrical cabinet includes: when the target electrical cabinet is a single, the second high-voltage isolation result of the target electrical cabinet is the first high-voltage isolation result of the target electrical cabinet; when there are multiple target electrical cabinets, if the high-voltage isolation results of all target electrical cabinets are successful, then the first high-voltage isolation result of the target electrical cabinet is successful; when there are multiple target electrical cabinets, if there is at least one target electrical cabinet whose high-voltage isolation result is a failure, then the first high-voltage isolation result of the target electrical cabinet is a failure.

[0018] It can be understood that based on the number of target electrical cabinets, the number of high-voltage isolation instructions of the target electrical cabinets is determined, and the high-voltage isolation instruction results of the target electrical cabinets are judged. The first high-voltage isolation result of the target electrical cabinet is determined for different numbers of target electrical cabinets. The first high-voltage isolation result of the target electrical cabinet is determined, and full coverage of the high-voltage isolation results of the target electrical cabinets under different numbers is achieved, thereby improving the correctness of the high-voltage isolation of the target electrical cabinet.

[0019] In some embodiments, the method also includes: if it is determined that the first high-voltage isolation result of the target electrical cabinet is successful, the maximum allowable charge and discharge energy of the energy storage system is restored from the first value to the maximum value; if it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure, then the high-voltage power-off process is exited, the maximum allowable charge and discharge energy of the energy storage system is restored from the first value to the maximum value, and the high-voltage power-on instruction of the energy storage system is restored.

[0020] It can be understood that when the first high-voltage isolation result of the target electrical cabinet fails, the battery management unit uses the above method so that the energy storage system can quickly resume normal high-voltage power-on operation, thereby improving the operational stability of the energy storage system.

[0021] In some embodiments, after providing feedback to the energy management system based on the first high-voltage isolation result, the method also includes: in response to an assignment instruction of the energy management system, setting the high-voltage isolation instruction of the target electrical cabinet from the first instruction value to the second instruction value, and clearing the first high-voltage isolation instruction result of the target electrical cabinet; and responding to the next high-voltage isolation instruction when the high-voltage isolation instruction of the target electrical cabinet is the second instruction value.

[0022] It can be understood that the battery management unit receives the assignment instruction from the energy management system, sets the high-voltage isolation instruction of the target electrical cabinet from the first instruction value to the second instruction value, and clears the first high-voltage isolation instruction result of the target electrical cabinet, thereby improving the accuracy of the battery management unit's response to the high-voltage isolation instruction from the energy management system.

[0023] In some embodiments, the method also includes: in the process of isolating the target electrical cabinet in response to the high-voltage isolation instruction, if the next high-voltage isolation instruction for the target electrical cabinet is received, then responding to the next high-voltage isolation instruction after completing the current isolation of the target electrical cabinet.

[0024] It can be understood that a response sequence is established for the high-voltage isolation instruction response of the target electrical cabinet, thereby avoiding the conflict of the high-voltage isolation instructions and improving the correctness of the execution of the high-voltage isolation instruction of the target electrical cabinet.

[0025] In some embodiments, the method further includes: after receiving the high-voltage isolation instruction, in the process of responding to the high-voltage isolation instruction, if a normal high-voltage lowering instruction or a preset level fault high-voltage power-off instruction for the energy storage system is received, then responding to the normal high-voltage lowering instruction or the preset level fault high-voltage power-off instruction; if a preset level fault high-voltage power-off instruction for the energy storage system is received in the process of responding to the normal high-voltage lowering instruction, then responding to the preset level fault high-voltage power-off instruction.

[0026] It can be understood that the energy storage system's high-voltage isolation instruction, normal high-voltage instruction and preset level fault high-voltage power-off instruction are prioritized in terms of command response. The battery management unit's response priorities to the above three instructions are ranked from high to low as follows: preset level fault high-voltage power-off instruction, normal high-voltage instruction and high-voltage isolation instruction. The response level ranking of the above instructions improves the stability of the energy storage system's operation.

[0027] In the second aspect, an embodiment of the present application provides another high-voltage isolation method for an electrical cabinet, which is applied to an energy management system, including: determining a target electrical cabinet to be high-voltage isolated in the energy storage system based on target data of the energy storage system, and generating a high-voltage isolation instruction for the target electrical cabinet; sending a high-voltage isolation instruction to a battery management unit; and receiving a first high-voltage isolation result fed back by the battery management unit based on the high-voltage isolation instruction.

[0028] It can be understood that the energy management system identifies the target electrical cabinet in the energy storage system, determines the electrical cabinet to be isolated at high voltage, and sends a high-voltage isolation instruction to the battery management unit. Under the normal operation of the energy storage system, the target electrical cabinet is isolated at high voltage, thereby effectively improving the operating efficiency of the energy storage system.

[0029] A high-voltage isolation instruction of the target electrical cabinet is sent to the battery management unit, and a first high-voltage isolation result based on the high-voltage isolation instruction feedback from the battery management unit is received, thereby realizing the coordinated interaction between the energy management system and the battery management unit, thereby increasing the effective control of the high-voltage isolation of the target electrical cabinet.

[0030] In some embodiments, the target electrical cabinet to be isolated by high voltage in the energy storage system is determined according to the target data of the energy storage system, and a high-voltage isolation instruction for the target electrical cabinet is generated, including: performing fault or abnormality detection according to the historical operation data and / or real-time processing data of the energy storage system, and determining the first isolated electrical cabinet; determining the second isolated electrical cabinet according to the received isolation information; the target electrical cabinet includes at least one of the first isolated electrical cabinet and the second isolated electrical cabinet; the target data includes at least one of the historical operation data, the real-time processing data and the isolation information.

[0031] It is understandable that the energy management system can detect faults or anomalies in the cabinets in the energy storage system based on the above-mentioned data, and can also input isolation information to the energy storage system externally, effectively improving the flexibility of high-voltage isolation of the target cabinet. By inputting isolation information to the energy storage system externally, remote control of the high-voltage isolation of the target cabinet is achieved, improving the efficiency of high-voltage isolation of the target cabinet in the energy storage system, and thus improving the operating efficiency of the energy storage system.

[0032] In some embodiments, the method further includes: when receiving the first high-voltage isolation result, sending an assignment instruction to the battery management unit, wherein the assignment instruction replaces the high-voltage isolation instruction of the target electrical cabinet from the first instruction value to the second instruction value.

[0033] It can be understood that each time the battery management unit executes the high-voltage isolation instruction of the target electrical cabinet, it must feedback the high-voltage isolation instruction result of the target electrical cabinet to the energy management system. The energy management system assigns a value to the high-voltage isolation instruction of the battery management unit to prepare the battery management unit to respond to the high-voltage isolation instruction of the target electrical cabinet again, thereby improving the accuracy of the battery management unit's response to the high-voltage isolation instruction.

[0034] In a third aspect, an embodiment of the present application provides a high-voltage isolation device for an electrical cabinet, which is applied to a battery management unit. The device includes: a first receiving module, which receives a high-voltage isolation instruction from an electrical cabinet of an energy management system, and the high-voltage isolation instruction indicates a target electrical cabinet to be isolated; a first determination module, which determines a first high-voltage isolation result of the target electrical cabinet based on the detected high-voltage processing status of the energy storage system and the high-voltage isolation instruction; and a first sending module, which provides feedback to the energy management system based on the first high-voltage isolation result.

[0035] In a fourth aspect, an embodiment of the present application provides a high-voltage isolation device for an electrical cabinet, which is applied to an energy management system. The device includes: a second determination module, which determines the target electrical cabinet to be high-voltage isolated in the energy storage system according to the target data of the energy storage system, and generates a high-voltage isolation instruction for the target electrical cabinet; a second sending module, which sends the high-voltage isolation instruction to the battery management unit; and a second receiving module, which receives a first high-voltage isolation result fed back by the battery management unit based on the high-voltage isolation instruction.

[0036] In a fifth aspect, an embodiment of the present application provides a high-voltage isolation device for an electrical cabinet, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements the steps in the above method when executing the program.

[0037] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the steps in the above method when executed by a processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0039] Figure 1 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application;

[0040] Figure 2 A communication schematic diagram of an energy storage system provided in an embodiment of the present application;

[0041] Figure 3 An optional process diagram of a high voltage isolation method for a battery management unit cabinet provided in an embodiment of the present application Figure 1 ;

[0042] Figure 4 Another optional process diagram of a high voltage isolation method for a power cabinet of a battery management unit provided in an embodiment of the present application Figure 2 ;

[0043] Figure 5 Another optional process diagram of a high voltage isolation method for an electric cabinet of a battery management unit provided in an embodiment of the present application Figure 3 ;

[0044] Figure 6 An optional flow chart of a high-voltage isolation method for an electric cabinet in an energy management system provided in an embodiment of the present application;

[0045] Figure 7 An optional flow chart of an exemplary high-voltage isolation method for an electrical cabinet provided in an embodiment of the present application;

[0046] Figure 8 A schematic diagram of the structure of a high-voltage isolation device for an electric cabinet of a battery management unit provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of the structure of a high-voltage isolation device for an electric cabinet in an energy management system provided in an embodiment of the present application;

[0048] Fig.10 A hardware entity schematic diagram of a high-voltage isolation device for an electrical cabinet provided in an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application are further elaborated in detail below in conjunction with the drawings and embodiments. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0050] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0051] It should be pointed out that the terms "first\second\third" involved in the embodiments of the present application are merely to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0052] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the embodiments of the present application belong. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0053] Battery Management Unit: includes the Master Battery Management Unit (MBMU) and the String Battery Management Unit (SBMU).

[0054] Energy management system: including energy management system (EMS) and battery management system (BMS).

[0055] In the embodiments of the present application, Figure 1 As shown, the structure of the energy storage system includes: multiple battery clusters (battery cluster 1, battery cluster 2, ..., battery cluster m), each battery cluster contains multiple battery packs (i.e., power cabinets). For example, battery cluster 1 includes battery pack 11, battery pack 12, ..., battery pack 1n; battery cluster 2 includes battery pack 21, battery pack 22, ..., battery pack 2n, etc., and battery cluster m includes battery pack m1, battery pack m2, ..., battery pack mn; wherein m and n are positive integers.

[0056] It should be noted that battery packs (electrical cabinets) are connected in series and parallel to form battery clusters, and multiple battery clusters are connected in parallel with the bus through switches (K1, K2, ..., Km) to form an energy storage system.

[0057] In the embodiment of the present application, the communication diagram of the energy storage system is as follows: Figure 2 As shown in the figure, its application architecture may include: EMS, BMS, MBMU and SBMU. Among them, each electric cabinet manages the electric cabinet through SBMU. In the energy storage system, EMS or BMS is mainly responsible for monitoring and managing the energy and battery of the energy storage system, MBMU is mainly responsible for monitoring the working condition of the battery and receiving instructions from EMS or BMS, and SBMU is mainly responsible for receiving instructions from MBMU to control the electric cabinet.

[0058] Here, EMS and BMS are collectively referred to as energy management systems, and MBMU and SBMU are collectively referred to as battery management units. In the embodiment of the present application, EMS and BMS may exist at the same time, or one of them may exist, which is not limited in the embodiment of the present application.

[0059] In the application embodiment, a high voltage isolation method of an electric cabinet is proposed, which is applied to a battery management unit, such as Figure 3 As shown, the method may include S101 to S103:

[0060] S101. Receive a high-voltage isolation instruction from an electric cabinet of an energy management system, where the high-voltage isolation instruction indicates a target electric cabinet to be isolated.

[0061] It should be noted that when an abnormality occurs in a cabinet in the energy storage system or the cabinet needs maintenance, the cabinet can be identified as a target cabinet by the energy management system. In the embodiment of the present application, for the target cabinet, the battery cluster where the abnormal cabinet is located can be isolated at high voltage during operation without hindering the operation of other cabinets.

[0062] In the embodiment of the present application, the battery management unit can achieve high-voltage isolation of the target power cabinet through the instruction of the upper-level device, that is, the energy management system. When the target power cabinet is determined, the energy management system will send a high-voltage isolation instruction for the target power cabinet to the battery management unit, so that the battery management unit can isolate the target power cabinet based on the instruction of the high-voltage isolation instruction.

[0063] In the embodiment of the present application, the high voltage isolation instruction may carry the identification of the target cabinet and the instruction value. The identification of the target cabinet may be text or graphics, etc., which is not limited in the embodiment of the present application. The instruction value is used to indicate the isolation action. In the embodiment of the present application, different numbers may be used to indicate whether isolation is performed.

[0064] Exemplarily, the instruction value can be 1 for isolation and 0 for non-isolation; it can also be true for isolation and false for non-isolation, etc. The embodiment of the present application does not limit the representation form.

[0065] It should be noted that since the target power cabinet is abnormal, it is the object to be isolated in this application. Therefore, the target power cabinet determined by the energy management system here needs to be isolated if it has not been processed. At this time, the command value in the high-voltage isolation command of the target power cabinet received by the battery management system should indicate isolation.

[0066] In some embodiments of the present application, the MBMU receives a high-voltage isolation instruction for a target electrical cabinet sent by the EMS or the BMS, and then instructs the SBMU to perform isolation processing on the target electrical cabinet.

[0067] In the embodiment of the present application, the high-voltage isolation instruction is used to instruct the target electrical cabinet to perform a high-voltage power-off process.

[0068] S102: Based on the detected high-voltage processing state of the energy storage system and in combination with the high-voltage isolation instruction, determine a first high-voltage isolation result of the target electrical cabinet.

[0069] It should be noted that the high-voltage processing state of the energy storage system can be divided into four types: high-voltage power-off state, high-voltage not on state, high-voltage power-on process in progress, and high-voltage power-on completed state. Among them, the high-voltage not on state, high-voltage power-on process in progress, and high-voltage power-on completed state are collectively referred to as non-high-voltage power-off state.

[0070] It should be noted that the present application embodiment does not limit the order in which the battery management unit determines the four states. The states may be detected sequentially in a certain preset order or in parallel.

[0071] In the embodiment of the present application, after the battery management unit receives the high-voltage isolation instruction of the target electric cabinet, the battery management unit determines the high-voltage processing state of the energy storage system by continuously monitoring the change in parameters such as the voltage value and current value of the energy storage system. Since the energy storage system can be in at least one of the above four high-voltage processing states. Therefore, the battery management unit can determine whether to respond to the high-voltage isolation instruction received from the electric cabinet according to the high-voltage processing state of the energy storage system, thereby comprehensively determining whether to perform a high-voltage isolation operation (i.e., a high-voltage power-off process) on the target electric cabinet, and then determine the first high-voltage isolation result of the target electric cabinet.

[0072] It should be noted that the target electrical cabinet can be a single electrical cabinet or multiple electrical cabinets. The number of target electrical cabinets is different, and the first high-voltage isolation result is also different. In the case of a single target electrical cabinet, the high-voltage isolation result of the target electrical cabinet is the first high-voltage isolation result of the target electrical cabinet. If the high-voltage isolation result of the target electrical cabinet is success / failure, the first high-voltage isolation result of the target electrical cabinet is success / failure; in the case of multiple target electrical cabinets, if the high-voltage isolation results of all target electrical cabinets are success, the first high-voltage isolation result of the target electrical cabinet is success; if there is at least one target electrical cabinet whose high-voltage isolation result is failure, the first high-voltage isolation result of the target electrical cabinet is failure.

[0073] In an embodiment of the present application, the battery management unit can determine the first high-voltage isolation result of the target electric cabinet by monitoring the voltage of the target electric cabinet. The first high-voltage isolation result is success / failure. The first high-voltage isolation result can be represented by a flag bit or in the form of an array, which is not limited in the embodiment of the present application. In an embodiment of the present application, the first high-voltage isolation result of the target electric cabinet is sent to the energy management system for feedback via data transmission or a transmission method carried in signaling.

[0074] For example, the data transmission method may be Ethernet, RS485, or CAN bus.

[0075] In some embodiments of the present application, the MBMU in the battery management unit receives a high-voltage isolation instruction for a target electrical cabinet, and the MBMU determines the high-voltage processing state of the energy storage system, and the MBMU determines whether to send a high-voltage isolation instruction for the target electrical cabinet to the SBMU based on the high-voltage processing state. If the SBMU receives a high-voltage isolation instruction for the target electrical cabinet, the SBMU performs a high-voltage isolation operation on the target electrical cabinet, and feeds back the result of the second high-voltage isolation instruction for the target electrical cabinet to the MBMU, and the MBMU determines the result of the first high-voltage isolation instruction for the target electrical cabinet based on the result of the second high-voltage isolation instruction and in combination with the number of target electrical cabinets.

[0076] S103: Based on the first high-voltage isolation result, provide feedback to the energy management system.

[0077] In the embodiment of the present application, each time the battery management unit executes a high-voltage isolation instruction, it must feed back the first high-voltage isolation result for the target electrical cabinet to the energy management system.

[0078] It should be noted that the MBMU in the battery management unit sends the first high-voltage isolation result to the EMS or BMS so that the energy management system EMS or BMS can reassign the high-voltage isolation instruction of the target power cabinet to improve the correctness of the next high-voltage isolation instruction of the target power cabinet.

[0079] It is understandable that when a target electric cabinet to be isolated appears in the energy storage system, the battery management unit determines whether the target electric cabinet executes the high-voltage isolation instruction according to the different high-voltage processing states of the energy storage system and the high-voltage isolation instruction. When the target electric cabinet in the energy storage system is in different high-voltage processing states, the battery management unit can respond to the high-voltage isolation instruction according to the different high-voltage processing states to achieve high-voltage isolation of the target electric cabinet under the normal operation of the energy storage system, thereby effectively improving the operating efficiency of the energy storage system.

[0080] In some embodiments, Figure 4 As shown, S102 may include S201 and S202 as follows:

[0081] S201. When it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, respond to a high-voltage isolation instruction, isolate a target electrical cabinet, and determine a first high-voltage isolation result of the target electrical cabinet.

[0082] It should be noted that if the battery management unit detects that the voltage and current values ​​of the electrical cabinet in the energy storage system are gradually decreasing, it can be judged that the electrical cabinet is in the high-voltage power-off process, and then the energy storage system can be judged to be in the high-voltage power-off state; otherwise, the battery management unit can judge that the energy storage system is in the non-high-voltage power-off state, and the non-high-voltage power-off state includes: no high-voltage state, in the high-voltage power-on process, and high-voltage power-on completion state.

[0083] In an embodiment of the present application, after the battery management unit receives the high-voltage isolation instruction of the target electric cabinet, the battery management unit determines the high-voltage processing state of the energy storage system. When the energy storage system is in any of the non-high-voltage power-off states, it indicates that the target electric cabinet is in a situation where high-voltage power-off is required. At this time, the battery management unit responds to the high-voltage isolation instruction, isolates the target electric cabinet, and determines the first high-voltage isolation result of the target electric cabinet.

[0084] In some embodiments of the present application, after the MBMU receives the high-voltage isolation instruction of the target electrical cabinet, the MBMU determines the high-voltage processing state of the energy storage system. When the energy storage system is in any non-high-voltage power-off state, the MBMU sends a high-voltage isolation instruction to the SBMU. The SBMU performs high-voltage isolation on the target electrical cabinet and feeds back the second high-voltage isolation instruction result for each target electrical cabinet to the MBMU. The MBMU determines the first high-voltage isolation instruction result for the target electrical cabinet based on the second high-voltage isolation instruction result and the number of target electrical cabinets.

[0085] S202: When it is detected that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, do not respond to the high-voltage isolation instruction, execute the high-voltage power-off process, and determine the first high-voltage isolation result of the target electrical cabinet based on the high-voltage power-off result.

[0086] It should be noted that if the battery management unit detects that the voltage and current values ​​of the power cabinet in the energy storage system are gradually decreasing, it can be determined that the power cabinet is in a high-voltage power-off process, and then the energy storage system can be determined to be in a high-voltage power-off state.

[0087] In the embodiment of the present application, when the battery management unit determines that the energy storage system is in a high-voltage power-off state, since the target power cabinet in the energy storage system is already in a high-voltage power-off state, the battery management unit may not respond to the high-voltage isolation instruction of the target power cabinet, but may continue to execute the current high-voltage power-off operation in the energy storage system to implement the isolation operation, and when the high-voltage power-off is completed, the first high-voltage isolation result of the target power cabinet is determined to be successful.

[0088] It should be noted that when the energy storage system is in a high-voltage power-off state, the target cabinet in the energy storage system is also in a high-voltage power-off state. At this time, the high-voltage power-off of the target cabinet can be understood as being equivalent to the isolation of the target cabinet. Therefore, the first high-voltage isolation result of the target cabinet is determined to be successful.

[0089] In some embodiments of the present application, when the MBMU determines that the energy storage system is in a high-voltage power-off state, the MBMU does not respond to the high-voltage isolation instruction of the target electrical cabinet, the SBMU continues to execute the high-voltage power-off operation of each electrical cabinet in the energy storage system, and feeds back to the MBMU that the result of the high-voltage isolation instruction of the target electrical cabinet is successful.

[0090] In some embodiments of the present application, when the MBMU determines that the energy storage system is in a high-voltage power-off state, the MBMU does not respond to the high-voltage isolation instruction of the target cabinet, and does not send the high-voltage isolation instruction of the target cabinet to the SBMU. At this time, the SBMU can continue to execute the high-voltage power-off operation of the target cabinet in the energy storage system previously instructed by the MBMU, and feed back the high-voltage power-off result of the target cabinet to the MBMU, and the MBMU determines that the first high-voltage isolation instruction result is successful.

[0091] In some embodiments of the present application, when the MBMU determines that the energy storage system is in a high-voltage power-off state, the MBMU does not respond to the high-voltage isolation instruction of the target cabinet, and does not send the high-voltage isolation instruction of the target cabinet to the SBMU. At this time, the SBMU can continue to execute the high-voltage power-off operation of the target cabinet in the energy storage system previously instructed by the MBMU, and feed back the high-voltage power-off result of the target cabinet to the MBMU, and the MBMU determines that the first high-voltage isolation instruction result is successful.

[0092] It can be understood that the detected high-voltage processing state of the energy storage system is divided into a non-high-voltage power-off state and a high-voltage power-off state. When the energy storage system is in different high-voltage processing states, the target electrical cabinet may be suitable for high-voltage isolation operation or unsuitable for high-voltage isolation operation. When the target electrical cabinet is suitable for high-voltage isolation, it responds to the high-voltage isolation instruction, and when the target electrical cabinet is not suitable for high-voltage isolation, it does not respond to the high-voltage isolation instruction, thereby improving the effectiveness of the high-voltage isolation of the electrical cabinet, and then improving the operating efficiency of the energy storage system.

[0093] In some embodiments, Figure 5 As shown, S201 may include S301 to S303 as follows:

[0094] S301. When it is detected that the non-high-voltage power-off state of the energy storage system is a non-high-voltage state, if a high-voltage power-on instruction of the energy storage system is received, respond to the high-voltage power-on instruction, power on the non-target cabinets of the energy storage system with high voltage, prohibit the target cabinets from being powered on with high voltage, isolate the target cabinets, and determine that the first high-voltage isolation result of the target cabinet is successful.

[0095] It should be noted that the battery management unit detects and determines the non-high-voltage processing state of the energy storage system by continuously monitoring the changes in parameters such as the voltage and current of the energy storage system. When the voltage of the energy storage system is lower than the power-on threshold of the energy storage system and the current of the energy storage system is zero or extremely small, the energy storage system is in a non-high-voltage state.

[0096] In an embodiment of the present application, when the energy storage system is in a non-high-voltage state, the target electric cabinet has not yet been high-voltage and is in a low-high-voltage state. When the battery management unit receives a high-voltage power-on instruction for the energy storage system, and then receives a high-voltage isolation instruction for the target electric cabinet, the battery management unit responds to the high-voltage power-on instruction, powers on the non-target electric cabinets of the energy storage system, and prohibits the target electric cabinet from being powered on, so that it is still in a low-high-voltage state, thereby isolating the target electric cabinet. At this time, the first high-voltage isolation result of the target electric cabinet is successful.

[0097] It should be noted that the battery management unit responds to the high-voltage power-on instruction and performs high-voltage power-on on the non-target cabinet of the energy storage system. At this time, no operation is performed on the target cabinet, and the target cabinet is still in a non-high-voltage state, thereby achieving isolation of the target cabinet. Therefore, the first high-voltage isolation result of the target cabinet is successful.

[0098] In the embodiment of the present application, the high-voltage power-on instruction of the energy storage system can be understood as instructing the electric cabinet to be connected to the energy storage system, and the voltage of the electric cabinet is gradually increased until the requirements of the energy storage system are met.

[0099] In some embodiments of the present application, when the energy storage system is in a non-high-voltage state, the MBMU receives a high-voltage power-on instruction and a high-voltage isolation instruction of the target electrical cabinet. At this time, the MBMU responds to the high-voltage power-on instruction, and the MBMU issues a high-voltage power-on instruction of the non-target electrical cabinet to the SBMU, and the SBMU executes the high-voltage power-on instruction on the non-target electrical cabinet, and the target electrical cabinet is still in a high-voltage power-off state. The SBMU feeds back the first high-voltage isolation result of the target electrical cabinet to the MBMU as successful, or the MBMU directly determines that the first high-voltage isolation result of the target electrical cabinet is successful.

[0100] S302: When it is detected that the non-high-voltage power-off state of the energy storage system is in the high-voltage power-on process, respond to the high-voltage isolation instruction and determine that the first high-voltage isolation result of the target electrical cabinet is successful.

[0101] In an embodiment of the present application, the battery management unit detects and determines the non-high-voltage processing state of the energy storage system by continuously monitoring the changes in parameters such as the voltage and current of the energy storage system. When the voltage of the energy storage system gradually increases and approaches the preset high-voltage value required by the energy storage system, the energy storage system is in the high-voltage power-on process.

[0102] In an embodiment of the present application, the battery management unit can classify the target power cabinets by detecting the voltage status of the target power cabinets, and divide the target power cabinets into target power cabinets that have not completed high-voltage power-on and target power cabinets that have completed high-voltage power-on.

[0103] In an embodiment of the present application, when the energy storage system is in the high-voltage power-on process, the battery management unit performs high-voltage power-on processing on both the target cabinet and the non-target cabinet that have completed high-voltage power-on, so that the cabinet remains in the high-voltage power-on state.

[0104] In an embodiment of the present application, in response to a high-voltage isolation instruction, the battery management unit performs high-voltage power-down for a target electrical cabinet that has not completed high-voltage power-up, thereby implementing an isolation operation.

[0105] It should be noted that the high-voltage power-down instruction instructs the electrical cabinet to gradually reduce the voltage until it reaches a safe level (preset voltage value) and then disconnects from the energy storage system, thereby achieving high-voltage isolation of the target electrical cabinet.

[0106] In some embodiments of the present application, when the energy storage system is in the high-voltage power-on process, the MBMU responds to the high-voltage power-on instruction, and the MBMU issues the high-voltage power-on instruction to the SBMU of the target cabinet that has completed the high-voltage power-on, and the SBMU of the non-target cabinet. The SBMU executes the high-voltage power-on instruction, so that the target cabinet that has completed the high-voltage power-on and the non-target cabinet are both kept in the high-voltage power-on state.

[0107] S303. When it is detected that the non-high-voltage power-off state of the energy storage system is changed to the high-voltage power-on completion state, based on the maximum charge and discharge power of the energy storage system and the detected total current, respond to the high-voltage isolation instruction, determine whether to isolate the target electrical cabinet, and determine the first high-voltage isolation result of the target electrical cabinet.

[0108] It should be noted that the battery management unit detects and determines the non-high-voltage processing state of the energy storage system by continuously monitoring the changes in parameters such as the voltage and current of the energy storage system. When the voltage of the energy storage system continuously reaches the required voltage (preset voltage value), the energy storage system is in a high-voltage power-on completion state.

[0109] In an embodiment of the present application, when the energy storage system is in a high-voltage power-on completion state, the battery management unit responds to the high-voltage isolation instruction based on the maximum charge and discharge energy of the energy storage system and the detected total current, determines whether to isolate the target electrical cabinet, and determines the first high-voltage isolation result of the target electrical cabinet.

[0110] It should be noted that the maximum charge and discharge energy of the energy storage system is the maximum current that the energy storage system can withstand or the maximum power that can be achieved during the charging or discharging process.

[0111] In some embodiments of the present application, when the energy storage system is in a high-voltage power-on completion state, the MBMU responds to a high-voltage isolation instruction based on the maximum charge and discharge power of the energy storage system and the detected total current, and determines whether to isolate the target electrical cabinet. If the target electrical cabinet is to be isolated at high voltage, the MBMU sends a high-voltage isolation instruction to the SBMU, and the SBMU performs the high-voltage isolation operation of the target electrical cabinet and feeds back the high-voltage isolation result to the MBMU.

[0112] It is understandable that the non-high-voltage power-off state of the energy storage system is further divided into three types: non-high-voltage state, high-voltage process, and high-voltage completion state. According to the detection that the energy storage system is in different high-voltage states, the high-voltage isolation instruction is responded to in a classified manner. The response conditions of each high-voltage isolation instruction are different. When the energy storage system is not in the high-voltage state, the high-voltage instruction is not sent to the target cabinet, and the identified target cabinet is excluded in advance so that it does not participate in the subsequent high-voltage power-on process of the energy storage system, which effectively improves the safety and effectiveness of the operation of the energy storage system; when the energy storage system is in the high-voltage completion state, according to the detected electric energy value of the energy storage system at the current moment, only when the electric energy value is within a safe range, will the high-voltage isolation instruction be responded to, which effectively improves the safety of the operation of the energy storage system.

[0113] In some embodiments, S303 may include S401 to S403 as follows:

[0114] S401. When limiting the maximum allowable charge and discharge energy of the energy storage system to a first value, after receiving a high-voltage isolation instruction for a first preset time, detect the total current of the energy storage system and determine the minimum operating current of the energy storage system.

[0115] In an embodiment of the present application, when the energy storage system is in a high-voltage power-on completion state, the battery management unit monitors and controls the charging and discharging process of the energy storage system to limit the maximum allowable charging and discharging energy of the energy storage system, and limits the maximum allowable charging and discharging current and power of the energy storage system to a first value.

[0116] Exemplarily, the first value may be 0, and the maximum allowable charge and discharge electric energy value of the energy storage system may be a flag bit or an array, which is not limited in the embodiments of the present application.

[0117] It should be noted that the first preset time may be determined by the inherent characteristics of the hardware device of the energy storage system, or may be set by itself, and the embodiment of the present application does not limit this.

[0118] It should be noted that the battery management system MBMU starts to respond to the high-voltage isolation instruction after receiving the high-voltage isolation instruction for a first preset time, so that the online electrical cabinets that are performing high-voltage power-on have time to complete the high-voltage power-on.

[0119] Exemplarily, the first preset time may be set within 10 seconds to 60 seconds.

[0120] It should be noted that the minimum operating current can be determined by the number of cabinets powered by the high voltage of the energy storage system and the cabinet current. The minimum operating current is determined by multiplying the number of cabinets by the current of each cabinet.

[0121] Exemplarily, the MBMU determines that the number of online cabinets in the energy storage system that are powered on at high voltage is 6, and the current value of each cabinet is I 1 (A), then the minimum operating current of the energy storage system is 6*I 1 (A).

[0122] S402: If the total current is continuously less than the minimum operating current within the second preset time, respond to the high-voltage isolation instruction, perform a high-voltage power-off process on the target electrical cabinet to achieve isolation, and determine a first high-voltage isolation result of the target electrical cabinet.

[0123] In an embodiment of the present application, the battery management unit detects the total current of the energy storage system, and after determining the minimum operating current of the energy storage system by calculation, the battery management unit compares the total current and the minimum operating current. If the total current of the energy storage system can be less than the minimum operating current of the energy storage system for a second preset time, indicating that the total current of the energy storage system is extremely low, and the energy storage system has been disconnected from the high-voltage power supply, the battery management unit can respond to the high-voltage isolation instruction and power off the high voltage of the target electrical cabinet to achieve isolation of the target electrical cabinet, and further determine the first high-voltage isolation result of the target electrical cabinet based on the result of the high-voltage power off of the target electrical cabinet.

[0124] It should be noted that the second preset time can be determined based on the inherent characteristics of the specific hardware products of the energy storage system, or can be set by itself, and the embodiment of the present application is not limited thereto.

[0125] In some embodiments of the present application, if the total current of the energy storage system continues to be less than the minimum operating current of the energy storage system within the second preset time, the MBMU sends a high-voltage isolation instruction to the SBMU, and the SBMU performs a high-voltage power-off operation on the target electrical cabinet to achieve isolation of the target electrical cabinet.

[0126] S403: If the total current is not continuously less than the minimum operating current within the second preset time, it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure.

[0127] In an embodiment of the present application, if the total current of the energy storage system fails to be continuously less than the minimum operating current of the energy storage system within the second preset time, the high voltage power is not removed from the target electrical cabinet, and the target electrical cabinet is not isolated by the high voltage, thereby determining that the first high voltage isolation result of the target electrical cabinet is a failure.

[0128] It should be noted that the total current of the energy storage system fails to be continuously less than the minimum operating current of the energy storage system within the second preset time, which includes at least any one of the following situations. The first situation is: the total current of the energy storage system is greater than the minimum operating current of the energy storage system; the second situation is: the total current of the energy storage system is less than the minimum operating current of the energy storage system, but the duration is less than the second preset time; when any of the above situations occurs, it can be understood that the energy storage system has not been disconnected from the high-voltage power supply.

[0129] It can be understood that by comparing the total current of the energy storage system and the minimum operating current of the energy storage system, the total current threshold of the energy storage system can be judged. When the total current of the energy storage system reaches the preset threshold, the target cabinet in the energy storage system is powered off at high voltage, which improves the safety of the high-voltage isolation of the cabinet and the stability of operation.

[0130] In some embodiments, S402 may include S501 to S503 as follows:

[0131] S501, responding to the high-voltage isolation instruction, if the high-voltage power of the target cabinet is successfully removed within a third preset time after the target cabinet is isolated, determining that the second high-voltage isolation result of the target cabinet is successful, and restoring the maximum allowable charge and discharge power of the energy storage system.

[0132] In an embodiment of the present application, within the third preset time after the target electric cabinet is isolated, the battery management unit determines whether the target electric cabinet has completed high-voltage power-off. If the target electric cabinet has completed high-voltage power-off, it determines that the second high-voltage isolation result of the target electric cabinet is successful, and the maximum allowable charging and discharging energy of the energy storage system is restored.

[0133] It should be noted that the third preset time is determined by the inherent characteristics of the hardware equipment of the energy storage system, and can also be set by itself, and the embodiment of the present application is not limited thereto.

[0134] Exemplarily, the third preset time may be set within 10 seconds to 60 seconds.

[0135] In some embodiments of the present application, the SBMU performs a high-voltage isolation operation on the target electrical cabinet. Within a third preset time after the high-voltage isolation, the SBMU determines whether the target electrical cabinet has completed high-voltage power removal, and feeds back a second high-voltage isolation result to the MBMU. If the second high-voltage isolation result of the target electrical cabinet is successful, the MBMU restores the maximum allowable charging and discharging energy of the energy storage system.

[0136] S502: If the high voltage power-off of the target electrical cabinet fails within a third preset time after the target electrical cabinet is isolated, determining that the second high voltage isolation result of the target electrical cabinet is a failure.

[0137] In an embodiment of the present application, within the third preset time after the target power cabinet is isolated, the battery management unit determines whether the target power cabinet has completed high-voltage power-off. If the target power cabinet has not completed high-voltage power-off, it is determined that the second high-voltage isolation result of the target power cabinet is a failure.

[0138] In some embodiments of the present application, within the third preset time after the target electrical cabinet is isolated, the SBMU determines whether the target electrical cabinet has completed high-voltage power-off. If the target electrical cabinet has not completed high-voltage power-off, the second high-voltage isolation result of the target electrical cabinet is failure, and the SBMU feeds back the second high-voltage isolation result to the MBMU.

[0139] S503: Determine a first high-voltage isolation result based on the second high-voltage isolation result of the target electrical cabinet.

[0140] In an embodiment of the present application, when the energy storage system is in a high-voltage completion state, the target electrical cabinet is powered off at high voltage, and a second high-voltage isolation result of the target electrical cabinet is determined.

[0141] It can be understood that if the total current of the energy storage system continues to be less than the minimum operating current of the energy storage system within the second preset time, the high-voltage isolation instruction is responded to, thereby improving the safety of the high-voltage isolation of the electrical cabinet; within the third preset time after the target electrical cabinet is isolated, it is determined whether the target electrical cabinet is powered off at high voltage, thereby improving the accuracy of the high-voltage isolation result of the target electrical cabinet.

[0142] It should be noted that the first high-voltage isolation result of the target electrical cabinet is determined by the second high-voltage isolation result of the target electrical cabinet and the number of the target electrical cabinets. This is achieved as follows:

[0143] In the case where there is a single target cabinet, the second high-voltage isolation result of the target cabinet is the first high-voltage isolation result of the target cabinet. In the case where there are multiple target cabinets, if the high-voltage isolation results of all target cabinets are successful, the first high-voltage isolation result of the target cabinet is successful. In the case where there are multiple target cabinets, if there is at least one target cabinet high-voltage isolation result that fails, the first high-voltage isolation result of the target cabinet is failed.

[0144] It should be noted that the high-voltage isolation instruction of the target electrical cabinet may be a high-voltage isolation instruction of a single target electrical cabinet or a high-voltage isolation instruction of multiple target electrical cabinets. The high-voltage isolation instruction of a single target electrical cabinet corresponds to a single high-voltage isolation result, and the high-voltage isolation instruction of multiple target electrical cabinets corresponds to multiple high-voltage isolation results.

[0145] In the embodiment of the present application, when the target electrical cabinet is a single one, the second high-voltage isolation result of the target electrical cabinet is regarded as the first high-voltage isolation result of the target electrical cabinet.

[0146] Exemplarily, when the target electrical cabinet is single, if the second high-voltage isolation result of the target electrical cabinet is successful, the first high-voltage isolation result of the target electrical cabinet is successful; if the second high-voltage isolation result of the target electrical cabinet is failed, the first high-voltage isolation result of the target electrical cabinet is failed.

[0147] In some embodiments of the present application, the SBMU of the target electrical cabinet feeds back the second high voltage isolation result of the target electrical cabinet to the MBMU, and the MBMU determines the first high voltage isolation result of the target electrical cabinet, that is, the second high voltage isolation result of the target electrical cabinet fed back by the SBMU.

[0148] In an embodiment of the present application, when there are multiple target electrical cabinets, the high-voltage isolation instructions of the multiple target electrical cabinets correspond to multiple second high-voltage isolation results, and it is determined whether the second high-voltage isolation results of the multiple target electrical cabinets are all successful. If the second high-voltage isolation results of the multiple target electrical cabinets are all successful, the first high-voltage isolation result of the target electrical cabinet is successful. If there is at least one target electrical cabinet whose second high-voltage isolation result is a failure, the first high-voltage isolation result of the target electrical cabinet is a failure.

[0149] In some embodiments of the present application, the SBMU of the target electrical cabinet feeds back the second high-voltage isolation results of multiple target electrical cabinets to the MBMU, and the MBMU determines the first high-voltage isolation result of the target electrical cabinet based on the multiple second high-voltage isolation results.

[0150] It can be understood that based on the number of target electrical cabinets, the number of high-voltage isolation instructions of the target electrical cabinets is determined, the second high-voltage isolation result of the target electrical cabinet is judged, and the first high-voltage isolation result of the target electrical cabinet is determined for different numbers of target electrical cabinets, thereby improving the accuracy of high-voltage isolation of target electrical cabinets under different numbers.

[0151] In some embodiments, if it is determined that the first high-voltage isolation result of the target electric cabinet is a failure, the high-voltage power-off process is exited, the maximum allowable charge and discharge energy of the energy storage system is restored from the first value to the maximum value, and the high-voltage power-on instruction of the energy storage system is restored.

[0152] It should be noted that when the target electric cabinet is isolated at high voltage, the maximum allowable charge and discharge energy of the energy storage system has been limited to a first value, for example, the maximum allowable charge and discharge energy of the energy storage system is 0.

[0153] In the embodiment of the present application, when the target electric cabinet is in a non-high-voltage power-off state, when the first high-voltage isolation result of the target electric cabinet is a failure, the battery management unit will no longer power off the high voltage of the target electric cabinet; the battery management unit will restore the normal operation state of the energy storage system, and restore the maximum allowable charge and discharge energy of the energy storage system from the first value to the maximum value. The battery management unit restores the high-voltage power-on instruction of the energy storage system, so that the energy storage system operates in the high-voltage power-on state.

[0154] It should be noted that the setting of the maximum value of the maximum allowable charging and discharging electric energy can be determined by factors such as the application requirements of the energy storage system and the inherent characteristics of the hardware equipment, or can be set by itself, and the embodiments of the present application are not limited thereto.

[0155] It can be understood that when the first high-voltage isolation result of the target electrical cabinet fails, the battery management unit no longer powers down the target electrical cabinet with high voltage, and restores the maximum allowable charge and discharge energy of the energy storage system from the first value to the maximum value, so that the energy storage system quickly resumes normal operation.

[0156] In some embodiments, in some embodiments, after providing feedback to the energy management system based on the first high-voltage isolation result, a high-voltage isolation method for an electric cabinet provided by an embodiment of the present application may further include S801 and S802:

[0157] S801, receiving an assignment instruction from an energy management system, setting a high-voltage isolation instruction of a target electric cabinet from a first instruction value to a second instruction value, and clearing a first high-voltage isolation instruction result of the target electric cabinet.

[0158] S802: When the high-voltage isolation instruction of the target electric cabinet is the second instruction value, respond to the next high-voltage isolation instruction.

[0159] It should be noted that the high-voltage isolation instruction may carry the identification of the target electrical cabinet and the instruction value.

[0160] It should be noted that the battery management unit receives a high-voltage isolation instruction from the energy management system. If the instruction value in the high-voltage isolation instruction is the first value, the first value indicates that the battery management unit needs to perform high-voltage isolation on the target electrical cabinet. After the high-voltage isolation instruction of the target electrical cabinet is processed, the first high-voltage isolation instruction result is formed and fed back to the energy management system, the energy management system instructs the battery management unit to assign the instruction value in the high-voltage isolation instruction to the second value. The second value indicates that the battery management unit does not need to perform high-voltage isolation on the target electrical cabinet, that is, it indicates that the high-voltage isolation instruction response is complete. In the case where the high-voltage isolation instruction of the target electrical cabinet is the second instruction value, the battery management unit can receive the next high-voltage isolation instruction for the target electrical cabinet from the energy management system. In the case where there are multiple target electrical cabinets, when the high-voltage isolation instructions of all target electrical cabinets are changed from the first instruction value to the second instruction value, the battery management unit can receive the next high-voltage isolation instruction for the target electrical cabinet from the energy management system.

[0161] In an embodiment of the present application, after the battery management unit feeds back the high-voltage isolation result of the target electrical cabinet to the energy management system, the energy management system may send an assignment instruction to the battery management unit, the assignment instruction indicating that the high-voltage isolation instruction of the target electrical cabinet is changed from a first instruction value to a second instruction value; and the battery management unit clears the first high-voltage isolation instruction result of the target electrical cabinet.

[0162] Exemplarily, the first high-voltage isolation instruction result of the target electrical cabinet can be determined by a flag bit. When the flag bit is 0, it indicates that the first high-voltage isolation instruction result of the target electrical cabinet has not been generated yet. When the flag bit is 1, it indicates that the first high-voltage isolation instruction result of the target electrical cabinet is successful. When the flag bit is 2, it indicates that the first high-voltage isolation instruction result of the target electrical cabinet is a failure. To clear the first high-voltage isolation instruction result of the target electrical cabinet, the flag bit is set to 0.

[0163] It should be noted that, when there are multiple target electrical cabinets, when the high-voltage isolation instructions of all target electrical cabinets are changed from the first instruction value to the second instruction value, the battery management unit clears the first high-voltage isolation instruction result of the target electrical cabinet.

[0164] It can be understood that the battery management unit responds to the assignment instruction from the energy management system, which improves the correctness of the battery management unit when it responds again to the high-voltage isolation instruction from the energy management system.

[0165] In some embodiments, the method may further include S901:

[0166] S901. In the process of isolating a target electric cabinet in response to a high-voltage isolation instruction, if a next high-voltage isolation instruction for the target electric cabinet is received, respond to the next high-voltage isolation instruction after completing the current isolation of the target electric cabinet.

[0167] In an embodiment of the present application, if the battery management unit is responding to a high-voltage isolation instruction from a target electrical cabinet, that is, the high-voltage power is being cut off from the target electrical cabinet, at this time, the battery management unit receives the next high-voltage isolation instruction from the energy management system for the target electrical cabinet, then the battery management unit continues to execute the high-voltage isolation instruction from the current target electrical cabinet, and cuts off the high-voltage power to the target electrical cabinet, until the high-voltage isolation instruction from the current target electrical cabinet is completed, and then responds to the next high-voltage isolation instruction from the target electrical cabinet.

[0168] In some embodiments of the present application, when the MBMU is in the process of reducing high voltage of the electrical cabinet high voltage isolation, if the high voltage isolation instruction changes, the MBMU needs to complete the current high voltage power-down process before responding to the next high voltage isolation instruction.

[0169] It can be understood that a response sequence is established for the high-voltage isolation instruction response of the target electrical cabinet, thereby avoiding the conflict of the high-voltage isolation instructions and improving the correctness of the execution of the high-voltage isolation instruction of the target electrical cabinet.

[0170] In some embodiments, the method may further include S1001 and S1002:

[0171] S1001. After receiving a high-voltage isolation instruction, in the process of responding to the high-voltage isolation instruction, if a normal high-voltage reduction instruction or a preset level fault high-voltage power-off instruction for the energy storage system is received, respond to the normal high-voltage reduction instruction or the preset level fault high-voltage power-off instruction.

[0172] In an embodiment of the present application, the high-voltage isolation instruction, the normal high-voltage instruction and the preset level fault high-voltage power-off instruction of the energy storage system are prioritized, wherein the response level of the battery management unit to the high-voltage isolation instruction is higher than the response level to the normal high-voltage instruction and the preset level fault high-voltage power-off instruction.

[0173] S1002: If a high voltage power-off instruction for a preset level fault of the energy storage system is received during the process of responding to a normal high voltage power-off instruction, respond to the high voltage power-off instruction for a preset level fault of the energy storage system.

[0174] In the embodiment of the present application, the response level of the battery management unit to the high voltage power-down instruction of the preset level fault is higher than the response level to the normal high voltage power-down instruction.

[0175] In an embodiment of the present application, the high-voltage isolation instruction, the normal high-voltage instruction and the preset level fault high-voltage power-off instruction are prioritized in terms of instruction response. The priority of the battery management unit's response to the above three instructions is ranked from high to low as follows: preset level fault high-voltage power-off instruction, normal high-voltage instruction and high-voltage isolation instruction. In the process of responding to the high-voltage isolation instruction or in the process of responding to the normal high-voltage instruction, the preset level fault high-voltage power-off instruction is given priority.

[0176] It can be understood that the response level ranking for the above instructions improves the stability of the energy storage system operation.

[0177] The present application embodiment proposes another high-voltage isolation method for an electric cabinet, which is applied to an energy management system, such as Figure 6 As shown, the method may include S1101 to S1103:

[0178] S1101. Determine a target electrical cabinet to be isolated by high voltage in the energy storage system according to target data of the energy storage system, and generate a high voltage isolation instruction for the target electrical cabinet.

[0179] S1102. Send a high voltage isolation instruction to the battery management unit.

[0180] In an embodiment of the present application, the target data includes at least one of historical operation data, real-time processing data, and isolation information (determined by isolation code or manual detection).

[0181] In an embodiment of the present application, the energy management system uses artificial intelligence, trend prediction or data analysis algorithms to determine, based on the target data of the energy storage system, an abnormality in the energy storage system or an electrical cabinet that needs maintenance, and determines the electrical cabinet that has an abnormality or needs maintenance as a target electrical cabinet to be isolated at high voltage, and generates a high-voltage isolation instruction for the target electrical cabinet based on the identification of the target electrical cabinet.

[0182] In some embodiments of the present application, fault or abnormality detection is performed based on historical operating data and / or real-time processing data of the energy storage system to determine the first isolated electrical cabinet.

[0183] It should be noted that the historical operation data of the energy storage system may include the historical voltage, historical current, historical temperature and other information of the power cabinet; the real-time processing data may include the real-time voltage, real-time current, real-time temperature and other information of the power cabinet, which is not limited in the embodiments of the present application.

[0184] Among them, the historical operation data and / or real-time processing data are all internal data of the energy storage system. The energy management system uses the internal data of the energy storage system to identify abnormal or faulty target cabinets and perform high-voltage isolation on the target cabinets in the energy storage system. The above-mentioned target cabinets are called first isolated cabinets.

[0185] In an embodiment of the present application, the energy management system can use historical operating data and / or real-time processing data to perform trend prediction, real-time fault detection, etc. on the energy storage system, identify the target electrical cabinet that has failed or may fail, and determine it as the first isolated electrical cabinet.

[0186] In some embodiments of the present application, the second isolated electrical cabinet is determined according to the received isolation information.

[0187] In the embodiment of the present application, the energy management system can also determine the target electrical cabinet through the received isolation information, and in this case, the determined target electrical cabinet is the second isolated electrical cabinet.

[0188] It should be noted that the isolation information received by the energy management system can be input from the outside, the isolation information includes the information of the electric cabinet to be isolated, and the isolation information can be digital or image, which is not specifically limited in the embodiment of the present application.

[0189] It should be noted that the isolation information can be input into the energy storage system through a host computer, or can be input into the energy storage system through other data transmission methods, which is not specifically limited in the embodiments of the present application.

[0190] It should be noted that the isolation information received by the energy management system is input from the outside, and the target electric cabinet determined thereby is referred to as the second isolation electric cabinet.

[0191] In an embodiment of the present application, the target electric cabinet includes at least one of a first isolated electric cabinet and a second isolated electric cabinet.

[0192] It is understandable that the energy management system can detect faults or abnormalities in the electrical cabinets in the energy storage system based on the above-mentioned various data, and can also manually input isolation information into the energy storage system, effectively improving the flexibility of high-voltage isolation of the target electrical cabinet. By manually inputting isolation information into the energy storage system, remote control of the high-voltage isolation of the target electrical cabinet is achieved, effectively reducing on-site operation time, thereby improving the operating efficiency of the energy storage system.

[0193] In an embodiment of the present application, the energy management system sends a high-voltage isolation instruction of the target electrical cabinet to the battery management unit, so that the battery management unit can respond to the high-voltage isolation instruction of the target electrical cabinet and perform isolation operations on the target electrical cabinet without affecting the normal operation of other electrical cabinets.

[0194] In some embodiments of the present application, the EMS or BMS sends a high voltage isolation instruction to the MBMU.

[0195] S1103, receiving a first high-voltage isolation result fed back by the battery management unit based on the high-voltage isolation instruction.

[0196] In an embodiment of the present application, the battery management unit responds to the high-voltage isolation instruction of the target electrical cabinet, generates a corresponding first high-voltage isolation instruction result, and sends the first high-voltage isolation result to the energy management system, thereby achieving isolation of the target electrical cabinet.

[0197] It can be understood that the target data of the energy storage system includes external input data and internal detection data, the external data is active isolation data, and the internal detection data is passive isolation data. The energy management system determines the target cabinet according to the target data of the energy storage system, and realizes the active high-voltage isolation and passive high-voltage isolation of the target cabinet. The high-voltage isolation instruction of the target cabinet is sent to the battery management unit, and the first high-voltage isolation result based on the feedback of the high-voltage isolation instruction by the battery management unit is received, so as to realize the coordinated interaction between the energy management system and the battery management unit, thereby increasing the effective control of the high-voltage isolation of the target cabinet.

[0198] In some embodiments, the method further includes S1301:

[0199] S1301. When a first high-voltage isolation result is received, an assignment instruction is sent to a battery management unit, wherein the assignment instruction sets the high-voltage isolation instruction of the target electrical cabinet from a first instruction value to a second instruction value.

[0200] In an embodiment of the present application, when the energy management system sends a high-voltage isolation instruction of the target electrical cabinet to the battery management unit, at this time, the high-voltage isolation instruction of the target electrical cabinet is a first instruction value, the battery management unit performs high-voltage isolation on the target electrical cabinet and feeds back the first high-voltage isolation result to the energy management system, and when the energy management system receives the first high-voltage isolation result, it sends an assignment instruction to the battery management unit, and at this time, the high-voltage isolation instruction of the target electrical cabinet is set to the second instruction value.

[0201] It can be understood that each time the battery management unit executes the high-voltage isolation instruction of the target electrical cabinet, it must feedback the high-voltage isolation instruction result of the target electrical cabinet to the energy management system. The energy management system assigns a value to the high-voltage isolation instruction of the battery management unit to prepare the battery management unit to respond to the high-voltage isolation instruction of the target electrical cabinet again, thereby improving the accuracy of the battery management unit's response to the high-voltage isolation instruction.

[0202] The high-voltage isolation method of the above-mentioned electrical cabinet is described below in conjunction with an application embodiment. However, it is worth noting that this embodiment is only for better illustrating the present application and does not constitute an improper limitation on the present application.

[0203] The present application embodiment provides a high voltage isolation method for an electric cabinet, such as Figure 7 As shown, the method may include S701 to S720:

[0204] S701, the EMS or BMS determines the electric cabinet that needs passive isolation (the first isolation electric cabinet) and the electric cabinet that needs active isolation (the second isolation electric cabinet).

[0205] In some embodiments of the present application, the EMS or BMS determines the target electrical cabinet that needs to be isolated by high voltage based on historical data statistics, trend prediction, real-time fault detection, active maintenance judgment and other means of the energy storage system. It should be noted that the target electrical cabinet determined by historical data statistics, real-time fault detection and other means is the target electrical cabinet that needs passive isolation, and the target electrical cabinet determined by external means such as active maintenance judgment is the target electrical cabinet that needs active isolation.

[0206] S702, the EMS or BMS determines whether there is a target electric cabinet that needs to be isolated, if so, proceed to S703, if not, continue to execute S701.

[0207] In some embodiments of the present application, the energy management system determines the target electrical cabinet to be isolated by high voltage according to the target data of the energy storage system.

[0208] S703: EMS or BMS sends a high-voltage isolation instruction for the target electrical cabinet to MBMU.

[0209] In some embodiments of the present application, the high-voltage isolation instruction of the electric cabinet issued by the EMS or BMS includes the information of the target electric cabinet, and the high-voltage isolation instruction is issued to the MBMU.

[0210] S704, MBMU determines whether the energy storage system is in the high voltage power-off process, if so, proceed to S705, if not, proceed to S706.

[0211] In the embodiment of the present application, when the MBMU receives the high-voltage isolation instruction of the electric cabinet issued by the EMS / BMS, the MBMU needs to take different processing measures according to different high-voltage processing states.

[0212] In some embodiments of the present application, after receiving the high-voltage isolation instruction, the MBMU detects the high-voltage processing state of the current energy storage system, and determines whether the energy storage system is in a high-voltage power-off process based on the changes in the voltage and current values ​​of the energy storage system that are continuously monitored. For example, when the voltage and current values ​​of the electrical cabinet gradually decrease, it can be determined that the energy storage system is in a high-voltage power-off process.

[0213] S705, MBMU needs to execute the normal high-voltage power-off process and does not respond to the high-voltage isolation command of the power cabinet.

[0214] In some embodiments of the present application, when the energy storage system is in the high-voltage power-off process, the MBMU does not respond to the high-voltage isolation instruction of the electrical cabinet and continues to execute the normal high-voltage power-off process.

[0215] S706 , MBMU determines whether the energy storage system is in a non-high voltage state, if so, proceeds to S707 , if not, proceeds to S708 .

[0216] In some embodiments of the present application, the MBMU determines whether the energy storage system is in a non-high-voltage state based on the changes in the voltage and current values ​​of the energy storage system that are continuously monitored. When the voltage level of the energy storage system is lower than the power-on threshold of the energy storage system and the current value of the energy storage system is zero or extremely small, it is determined that the energy storage system is in a non-high-voltage state.

[0217] S707 . The MBMU refuses to perform voltage sequencing of the high-voltage power-on process on the target power cabinet, and does not send a high-voltage power-on instruction to the target power cabinet.

[0218] In some embodiments of the present application, when the MBMU determines that the energy storage system is in a non-high voltage state, the MBMU does not send a high voltage power-on instruction to the target cabinet, and only allows non-target cabinets to participate in the high voltage power-on process of the energy storage system. In other words, if the energy storage system is in a non-high voltage state, when the MBMU receives a high voltage power-on instruction, the target cabinet isolated by the high voltage should not participate in the voltage sorting in the high voltage power-on process, and the MBMU does not send a high voltage power-on instruction to the target cabinet.

[0219] It should be noted that when MBMU sorts the cabinets participating in the high-voltage power-on process, it does not include the target cabinets, but only includes non-target cabinets.

[0220] S708 . The MBMU determines whether the energy storage system is in the high voltage power-on process. If so, the process proceeds to S709 . If not, the process proceeds to S710 .

[0221] In some embodiments of the present application, when the MBMU determines that the energy storage system is not in a non-high-voltage state, the MBMU continues to determine whether the energy storage system is in a high-voltage power-on process based on the changes in the voltage and current values ​​of the electrical cabinet that are continuously monitored. When the voltage of the energy storage system gradually increases and approaches the high-voltage level required by the energy storage system, it is determined that the energy storage system is in a high-voltage power-on process.

[0222] S709 , the MBMU sends a high voltage power-off instruction (high voltage isolation instruction) to the SBMU that has not completed high voltage power-on and the high voltage isolation instruction of the electric cabinet is set to 1.

[0223] In some embodiments of the present application, when the energy storage system is in the high-voltage power-on process, the MBMU classifies the target cabinets by detecting the voltage status of the target cabinets, and divides the target cabinets into target cabinets that have not completed high-voltage power-on and target cabinets that have completed high-voltage power-on. For the target cabinets that have not completed high-voltage power-on, the MBMU sends a high-voltage power-off instruction to the SBMU where the target cabinet is located, and the high-voltage power-off instruction instructs the cabinet to gradually reduce the voltage until it reaches a safe level; for the target cabinets that have completed high-voltage power-on, the MBMU sends a high-voltage power-on instruction to the SBMU where the target cabinet is located.

[0224] That is, if the energy storage system is in the high-voltage process, the MBMU should maintain the execution of the high-voltage instruction to the SBMU of the target cabinet that has completed the high-voltage power-up. The MBMU should send a low-voltage instruction to the SBMU of the target cabinet that has not completed the high-voltage power-up and has the high-voltage isolation instruction set to 1.

[0225] S710: If the energy storage system is in a high-voltage power-on completion state, the MBMU limits the maximum allowable charge and discharge current and power to 0.

[0226] In some embodiments of the present application, when the energy storage system is in the high-voltage power-on process, the MBMU sets the maximum allowable charge and discharge current and power of the energy storage system to 0, so that the energy storage system can more safely perform isolation operations on the target electrical cabinet.

[0227] S711. Within the first preset time after the MBMU receives the high-voltage isolation instruction, it is determined whether |total system current|<number of high-voltage online cabinets*(I 1) is satisfied and lasts for a second preset time. If so, it proceeds to S712; if not, it proceeds to S713.

[0228] It should be noted that I1 is the minimum current that can maintain the normal operation of the switchgear; the number of switchgear on the high-voltage line * (I1) is the minimum current that can maintain the normal operation of the energy storage system.

[0229] It should be noted that the first preset time and the second preset time are determined based on the inherent characteristics of the specific hardware products of the energy storage system.

[0230] For example, the first preset time may be any value between 10 seconds and 60 seconds; the second preset time may be any value between 10 milliseconds and 60 milliseconds. The MBMU determines whether the power of the energy storage system has reached the minimum power state that can maintain its normal operation, so as to isolate the target electrical cabinet more safely.

[0231] S712. The MBMU sends a high voltage power-off instruction to the target electrical cabinet isolated from the high voltage.

[0232] In some embodiments of the present application, the MBMU sends a high-voltage isolation instruction to the target electrical cabinet that is isolated from high voltage, instructing the target electrical cabinet to power off the high voltage, thereby achieving high-voltage isolation of the target electrical cabinet.

[0233] S713, MBMU feedbacks that the high-voltage isolation of the target cabinet fails to lower the high voltage, MBMU exits the high-voltage lowering process, restores the system's maximum allowable charge and discharge current and power, and restores the high-voltage upper instruction.

[0234] It should be noted that the high-voltage isolation operation or isolation operation in the embodiment of the present application is a high-voltage down process or a high-voltage power-down process.

[0235] In some embodiments of the present application, the failure of the high-voltage isolation of the electric cabinet can be understood as the failure of the isolated target electric cabinet to be disconnected from the energy storage system; exiting the low-voltage process can be understood as the MBMU no longer sending an instruction to the isolated target electric cabinet to disconnect from the energy storage system; restoring the system's maximum allowable charge and discharge current can be understood as restoring the normal charge and discharge operation of the energy storage system; and restoring the high-voltage instruction can be understood as the MBMU commanding the energy storage system to connect to the high-voltage power supply and start working.

[0236] S714: Within the third preset time after the MBMU sends the high voltage lowering instruction, whether the SBMU of the target cabinet isolated by the high voltage feeds back that the high voltage lowering is successful; if so, proceed to S715; if not, proceed to S716.

[0237] In some embodiments of the present application, the MBMU sends a high-voltage power-off instruction (i.e., a high-voltage isolation instruction) to the SBMU, and the SBMU of the target electrical cabinet responds to the high-voltage power-off instruction. Within a third preset time after the MBMU sends the high-voltage power-off instruction, the MBMU determines whether the SBMU has fed back that the high-voltage power-off of the target electrical cabinet is successful (i.e., the second high-voltage isolation result). It should be noted that the third preset time is determined by the inherent characteristics of the hardware equipment of the energy storage system. Exemplarily, the third preset time can be set to any value between 10 seconds and 60 seconds.

[0238] S715, MBMU restores the maximum allowable charge and discharge current and power of the system.

[0239] In some embodiments of the present application, the MBMU restores the maximum allowable charge and discharge current and power of the energy storage system so that the energy storage system resumes normal operation under high voltage.

[0240] S716, MBMU feedback target cabinet high voltage isolation high voltage failure, MBMU exits the high voltage reduction process, restores the system maximum allowable charge and discharge current and power, and restores the high voltage instruction.

[0241] In some embodiments of the present application, the failure to lower the high voltage can be understood as the isolated target power cabinet failing to disconnect from the energy storage system; exiting the lower high voltage process can be understood as the MBMU no longer sending an instruction to the isolated target power cabinet to disconnect from the energy storage system; restoring the system's maximum allowable charge and discharge current can be understood as restoring the normal charge and discharge operation of the energy storage system; and restoring the upper high voltage instruction can be understood as the MBMU commanding the energy storage system to connect to the high voltage power supply and start working.

[0242] S717, MBMU determines whether all target cabinets isolated by high voltage have successfully lowered the high voltage. If so, proceed to S718, if not, proceed to S719.

[0243] In some embodiments of the present application, the MBMU can determine all target electrical cabinets based on the high-voltage isolation instruction issued by the energy management system, and then compare the electrical cabinet information based on the target electrical cabinets that have successfully powered off the high voltage as fed back by the SBMU, to determine whether all target electrical cabinets have successfully completed the high-voltage power-off.

[0244] S718, MBMU feeds back to EMS or BMS that the high-voltage isolation of the electric cabinet is successful (the first high-voltage isolation result).

[0245] In some embodiments of the present application, if all target electrical cabinets have successfully completed high-voltage power-off, the MBMU feeds back to the energy management system that the high-voltage isolation of the electrical cabinets has been successful.

[0246] S719, MBMU feeds back to EMS or BMS that the high-voltage isolation of the electric cabinet failed (the first high-voltage isolation result).

[0247] In some embodiments of the present application, if not all the high-voltage isolated electrical cabinets have successfully reduced the high voltage, the MBMU will feedback to the energy management system that the high-voltage isolation of the electrical cabinet has failed to reduce the high voltage.

[0248] S720, EMS or BMS determines that the high-voltage isolation instructions of all electrical cabinets are set to 0.

[0249] In some embodiments of the present application, when the energy management system receives feedback from MBMU that the high-voltage isolation of the electrical cabinet has failed, the energy management system sends an instruction to MBMU to set the high-voltage isolation instructions of all electrical cabinets to 0. Only when the high-voltage isolation instructions of the electrical cabinets are successfully set to 0 can the MBMU respond to the high-voltage isolation instruction again.

[0250] It should be noted that when all the target electrical cabinets that are isolated by high voltage have successfully reduced the high voltage, MBMU should feedback that the high voltage isolation of the electrical cabinet has been successful, otherwise MBMU should feedback that the high voltage isolation of the electrical cabinet has failed; MBMU updates the result once after executing each round of high voltage isolation process and feeds it back to the superior energy management system; when the high voltage isolation instructions of all electrical cabinets are set to 0, MBMU needs to clear the high voltage isolation results of the electrical cabinet.

[0251] In the embodiment of the present application, if the first high-voltage isolation result under the high-voltage isolation of the electric cabinet is a failure, the MBMU can respond to the next high-voltage isolation instruction again only after the high-voltage isolation instructions of all electric cabinets are set to 0.

[0252] In the embodiment of the present application, on the one hand, when a target electric cabinet to be isolated appears in the energy storage system, the battery management unit determines whether the target electric cabinet executes the high-voltage isolation instruction according to the different high-voltage processing states of the energy storage system and the high-voltage isolation instruction. When the target electric cabinet in the energy storage system is in different high-voltage processing states, the battery management unit can respond to the high-voltage isolation instruction according to the different high-voltage processing states to achieve high-voltage isolation of the target electric cabinet under the normal operation of the energy storage system, thereby effectively improving the operating efficiency of the energy storage system.

[0253] The present application embodiment provides a high-voltage isolation device 800 for an electric cabinet, which is applied to a battery management unit, such as Figure 8 As shown, the high voltage isolation device 800 of the electric cabinet includes:

[0254] A first receiving module 801 is used to receive a high-voltage isolation instruction of an electric cabinet of an energy management system, wherein the high-voltage isolation instruction indicates a target electric cabinet to be isolated;

[0255] A first determination module 802 is used to determine a first high-voltage isolation result of a target electric cabinet based on the detected high-voltage processing state of the energy storage system and in combination with the high-voltage isolation instruction;

[0256] The first sending module 803 is used to provide feedback to the energy management system based on the first high-voltage isolation result.

[0257] In some embodiments, the first determination module 802 is further used to respond to the high-voltage isolation instruction to isolate the target electrical cabinet and determine the first high-voltage isolation result of the target electrical cabinet when it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, and the non-high-voltage power-off state includes a high-voltage-not-on state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; and,

[0258] When it is detected that the high voltage processing state of the energy storage system is in the high voltage power-off state, the high voltage isolation instruction is not responded to, the high voltage power-off process is executed, and the first high voltage isolation result of the target electrical cabinet is determined based on the result of the high voltage power-off.

[0259] In some embodiments, the first determination module 802 is further configured to, when it is detected that the non-high-voltage power-off state of the energy storage system is the non-high-voltage state, respond to the high-voltage power-on instruction to power on the non-target cabinets of the energy storage system, prohibit the target cabinets from being powered on at high voltage, isolate the target cabinets, and determine that the first high-voltage isolation result of the target cabinets is successful; and,

[0260] When it is detected that the non-high-voltage power-off state of the energy storage system is in the high-voltage power-on process, isolating the target electric cabinet that has not completed the high-voltage power-on, and determining that the first high-voltage isolation result of the target electric cabinet is successful; and

[0261] When it is detected that the non-high-voltage power-off state of the energy storage system is the high-voltage power-on completion state, based on the maximum charge and discharge energy of the energy storage system and the detected total current, respond to the high-voltage isolation instruction, determine whether to isolate the target electrical cabinet, and determine the first high-voltage isolation result of the target electrical cabinet.

[0262] In some embodiments, the first determination module 802 is further configured to detect the total current of the energy storage system and determine the minimum operating current of the energy storage system after receiving the high-voltage isolation instruction for a first preset time, while limiting the maximum allowable charge and discharge electric energy of the energy storage system to a first value; and,

[0263] If the total current is continuously less than the minimum operating current within the second preset time, responding to the high-voltage isolation instruction, performing a high-voltage power-off process on the target electrical cabinet to achieve isolation, and determining a first high-voltage isolation result of the target electrical cabinet; and

[0264] If the total current is not continuously less than the minimum operating current within the second preset time, it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure.

[0265] In some embodiments, the first determination module 802 is further used to respond to the high-voltage isolation instruction, if the high-voltage power-off of the target electric cabinet is successfully performed within a third preset time after the isolation of the target electric cabinet, determine that the second high-voltage isolation result of the target electric cabinet is successful, and restore the maximum allowable charge and discharge power of the energy storage system; and,

[0266] If the high voltage of the target electrical cabinet fails to be powered off within a third preset time after the target electrical cabinet is isolated, the second high voltage isolation result of the target electrical cabinet is determined to be a failure; and the first high voltage isolation result is determined based on the second high voltage isolation result of the target electrical cabinet.

[0267] In some embodiments, the first determining module 802 is further configured to, when the target electrical cabinet is a single cabinet, determine that the second high-voltage isolation result of the target electrical cabinet is the first high-voltage isolation result of the target electrical cabinet; and

[0268] In the case where there are multiple target cabinets, if the high-voltage isolation results of all the target cabinets are successful, then the first high-voltage isolation result of the target cabinet is successful; and,

[0269] In the case that there are multiple target electrical cabinets, if the high-voltage isolation result of at least one of the target electrical cabinets fails, the first high-voltage isolation result of the target electrical cabinet fails.

[0270] In some embodiments, the first determination module 802 is further used to exit the high-voltage power-off process if it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure, restore the maximum allowable charge and discharge energy of the energy storage system from the first value to the maximum value, and restore the high-voltage power-on instruction of the energy storage system.

[0271] In some embodiments, the high voltage isolation device 800 of the electrical cabinet further includes: an assignment module 804 and a response module 805;

[0272] An assignment module 804 is used to respond to the assignment instruction sent by the energy management system, set the high-voltage isolation instruction of the target electric cabinet from the first instruction value to the second instruction value, and clear the first high-voltage isolation instruction result of the target electric cabinet;

[0273] The response module 805 is used to respond to the next high-voltage isolation instruction when the high-voltage isolation instruction of the target electrical cabinet is the second instruction value.

[0274] In some embodiments, the high voltage isolation device 800 of the electrical cabinet further includes a response module 805;

[0275] The response module 805 is used to respond to the high-voltage isolation instruction and isolate the target electrical cabinet. If the next high-voltage isolation instruction for the target electrical cabinet is received, it will respond to the next high-voltage isolation instruction after completing the current isolation of the target electrical cabinet.

[0276] In some embodiments, the high voltage isolation device 800 of the electrical cabinet further includes a response module 805;

[0277] A response module 805 is used for, after receiving the high-voltage isolation instruction, in the process of responding to the high-voltage isolation instruction, if a normal high-voltage down instruction or a preset level fault high-voltage power-off instruction for the energy storage system is received, responding to the normal high-voltage down instruction or the preset level fault high-voltage power-off instruction; and,

[0278] If a high voltage power-off command for a preset level fault of the energy storage system is received during the process of responding to the normal high voltage power-off command, the preset level fault high voltage power-off command is responded to.

[0279] It is understandable that when a target electric cabinet to be isolated appears in the energy storage system, the battery management unit determines whether the target electric cabinet executes the high-voltage isolation instruction according to the different high-voltage processing states of the energy storage system and the high-voltage isolation instruction. When the target electric cabinet in the energy storage system is in different high-voltage processing states, the battery management unit can respond to the high-voltage isolation instruction according to the different high-voltage processing states to achieve high-voltage isolation of the target electric cabinet under the normal operation of the energy storage system, thereby effectively improving the operating efficiency of the energy storage system.

[0280] The present application embodiment provides a high-voltage isolation device 910 for an electric cabinet, which is applied to an energy management system, such as Fig. 9 As shown, the high voltage isolation device 910 of the electric cabinet includes:

[0281] A second determination module 911 is used to determine a target electric cabinet to be isolated by high voltage in the energy storage system according to target data of the energy storage system, and generate a high voltage isolation instruction for the target electric cabinet;

[0282] A second sending module 912, configured to send the high voltage isolation instruction to a battery management unit;

[0283] The second receiving module 913 is used to receive a first high-voltage isolation result fed back by the battery management unit based on the high-voltage isolation instruction.

[0284] In some embodiments, the second determination module 911 is further used to perform fault or abnormality detection based on historical operation data and / or real-time processing data of the energy storage system to determine the first isolation cabinet; and

[0285] Determining a second isolation cabinet according to the received isolation information; and,

[0286] The target electric cabinet includes at least one of the first isolated electric cabinet and the second isolated electric cabinet; the target data includes at least one of the historical operation data, the real-time processing data and the isolation information.

[0287] In some embodiments, the second sending module 912 is further used to send an assignment instruction to the battery management unit when the first high-voltage isolation result is received, wherein the assignment instruction sets the high-voltage isolation instruction of the target electrical cabinet from the first instruction value to the second instruction value.

[0288] It can be understood that the energy management system identifies the target electrical cabinet in the energy storage system, determines the electrical cabinet to be isolated at high voltage, and sends a high-voltage isolation instruction to the battery management unit. Under the normal operation of the energy storage system, the target electrical cabinet is isolated at high voltage, thereby effectively improving the operating efficiency of the energy storage system.

[0289] The description of the above device embodiment is similar to the description of the above method embodiment, and has similar beneficial effects as the method embodiment. In some embodiments, the functions or modules included in the device provided in the embodiment of the present application can be used to execute the method described in the above method embodiment. For technical details not disclosed in the device embodiment of the present application, please refer to the description of the method embodiment of the present application for understanding.

[0290] It should be noted that in the embodiments of the present application, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application can be essentially or partly reflected in the form of a software product that contributes to the relevant technology. The software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific hardware, software or firmware, or any combination of hardware, software, and firmware.

[0291] The present application embodiment provides a high-voltage isolation device for an electric cabinet, such as Fig.10 As shown, the hardware entity of the high-voltage isolation device 1000 of the electric cabinet includes: a processor 1001 and a memory 1003, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, it implements the steps in the high-voltage isolation method of the electric cabinet applied to the battery management unit, or the steps in the high-voltage isolation method of the electric cabinet applied to the energy management system.

[0292] It should be noted that the processor 1001 generally controls the overall operation of the high-voltage isolation device 1000 of the electric cabinet. The memory 1003 is configured to store instructions and applications executable by the processor 1001, and can also cache data to be processed or processed by each module in the processor 1001 and the high-voltage isolation device 1000 of the electric cabinet (for example, image data, audio data, voice communication data, and video communication data), which can be implemented through flash memory (FLASH) or random access memory (Random Access Memory, RAM). The high-voltage isolation device of the electric cabinet may also include: a communication interface 1002; the communication interface 1002 can enable the high-voltage isolation device of the electric cabinet to communicate with other terminals or servers through the network. Data transmission can be carried out between the processor 1001, the communication interface 1002 and the memory 1003 through the bus 1004.

[0293] Based on the foregoing embodiments, the modules included in the high-voltage isolation device of the electric cabinet provided in the embodiments of the present application, as well as the units included in each module, etc., can be implemented by a processor in a computer device; of course, they can also be implemented by a specific logic circuit; in the implementation process, the processor can be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA), etc.

[0294] The embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all steps in the high-voltage isolation method for an electric cabinet applied to a battery management unit and all steps in the high-voltage isolation method for an electric cabinet applied to an energy management system are implemented. The computer-readable storage medium may be transient or non-transient.

[0295] It should be noted here that the description of the various embodiments above tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. The description of the above device and storage medium embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the device and storage medium embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0296] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the serial number of each step / process mentioned above does not mean the order of execution, and the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The serial numbers of the embodiments of the present application mentioned above are for description only and do not represent the advantages and disadvantages of the embodiments.

[0297] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0298] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. The above description is only an implementation method of this application, but the protection scope of this application is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered within the protection scope of this application.

Claims

1. A high voltage isolation method for an electric cabinet, characterized in that: Applied to the battery management unit, the high voltage isolation method of the electric cabinet includes: Receiving a high-voltage isolation instruction from an electric cabinet of an energy management system, wherein the high-voltage isolation instruction indicates a target electric cabinet to be isolated; In the case of detecting that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, responding to the high-voltage isolation instruction, isolating the target electrical cabinet, and determining a first high-voltage isolation result of the target electrical cabinet, wherein the non-high-voltage power-off state includes a non-high-voltage state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; the first high-voltage isolation result indicates the result of the target electrical cabinet executing the high-voltage power-off; When it is detected that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, the high-voltage isolation instruction is not responded to, a high-voltage power-off process is executed, and a first high-voltage isolation result of the target electric cabinet is determined based on the result of the high-voltage power-off; Based on the first high-voltage isolation result, feedback is provided to the energy management system.

2. The high voltage isolation method of an electric cabinet according to claim 1, characterized in that: When it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-down state, responding to the high-voltage isolation instruction, isolating the target electric cabinet, and determining a first high-voltage isolation result of the target electric cabinet include: In the case where it is detected that the non-high-voltage power-off state of the energy storage system is the non-high-voltage state, if a high-voltage power-on instruction of the energy storage system is received, respond to the high-voltage power-on instruction, power on the non-target cabinet of the energy storage system with high voltage, prohibit the target cabinet from being powered on with high voltage, isolate the target cabinet, and determine that the first high-voltage isolation result of the target cabinet is successful; When it is detected that the non-high-voltage power-off state of the energy storage system is in the high-voltage power-on process, isolating the target electric cabinet that has not completed the high-voltage power-on, and determining that the first high-voltage isolation result of the target electric cabinet is successful; When it is detected that the non-high-voltage power-off state of the energy storage system is the high-voltage power-on completion state, based on the maximum charge and discharge energy of the energy storage system and the detected total current, respond to the high-voltage isolation instruction, determine whether to isolate the target electrical cabinet, and determine the first high-voltage isolation result of the target electrical cabinet.

3. The high voltage isolation method of an electric cabinet according to claim 2, characterized in that: The step of responding to the high-voltage isolation instruction based on the maximum charge and discharge electric energy of the energy storage system and the detected total current, determining whether to isolate the target electric cabinet, and determining a first high-voltage isolation result of the target electric cabinet includes: In the case where the maximum allowable charge and discharge electric energy of the energy storage system is limited to a first value, after receiving the high-voltage isolation instruction for a first preset time, detecting the total current of the energy storage system and determining the minimum operating current of the energy storage system; If the total current is continuously less than the minimum operating current within the second preset time, responding to the high-voltage isolation instruction, performing a high-voltage power-off process on the target electrical cabinet to achieve isolation, and determining a first high-voltage isolation result of the target electrical cabinet; If the total current is not continuously less than the minimum operating current within the second preset time, it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure.

4. The high voltage isolation method of an electric cabinet according to claim 3, characterized in that: The step of responding to the high-voltage isolation instruction, performing a high-voltage power-off process on the target electrical cabinet to achieve isolation, and determining a first high-voltage isolation result of the target electrical cabinet includes: In response to the high-voltage isolation instruction, if the high-voltage power of the target electric cabinet is successfully turned off within a third preset time after the isolation of the target electric cabinet, determining that the second high-voltage isolation result of the target electric cabinet is successful, and restoring the maximum allowable charge and discharge power of the energy storage system; If the high voltage of the target electrical cabinet fails to be powered off within a third preset time after the target electrical cabinet is isolated, determining that the second high voltage isolation result of the target electrical cabinet is a failure; The first high-voltage isolation result is determined based on the second high-voltage isolation result of the target electrical cabinet.

5. The high voltage isolation method of an electric cabinet according to claim 4, characterized in that: The determining the first high-voltage isolation result based on the second high-voltage isolation result of the target electrical cabinet includes: In the case where the target electrical cabinet is a single one, the second high-voltage isolation result of the target electrical cabinet is the first high-voltage isolation result of the target electrical cabinet; In the case where there are multiple target electrical cabinets, if the high-voltage isolation results of all the target electrical cabinets are successful, then the first high-voltage isolation result of the target electrical cabinet is successful; In the case that there are multiple target electrical cabinets, if the high-voltage isolation result of at least one of the target electrical cabinets fails, the first high-voltage isolation result of the target electrical cabinet fails.

6. The high voltage isolation method of an electric cabinet according to claim 5, characterized in that: The method further comprises: If it is determined that the first high-voltage isolation result of the target electrical cabinet is a failure, the high-voltage power-off process is exited, the maximum allowable charge and discharge energy of the energy storage system is restored from the first value to the maximum value, and the high-voltage power-on instruction of the energy storage system is restored.

7. The high voltage isolation method of an electric cabinet according to any one of claims 1 to 6, characterized in that: After providing feedback to the energy management system based on the first high-voltage isolation result, the method further includes: In response to the assignment instruction sent by the energy management system, the high-voltage isolation instruction of the target electric cabinet is set from the first instruction value to the second instruction value, and the first high-voltage isolation instruction result of the target electric cabinet is cleared; When the high-voltage isolation instruction of the target electric cabinet is the second instruction value, respond to the next high-voltage isolation instruction.

8. The high voltage isolation method of an electric cabinet according to any one of claims 1 to 6, characterized in that: The method further comprises: In the process of isolating the target electrical cabinet in response to the high-voltage isolation instruction, if the next high-voltage isolation instruction for the target electrical cabinet is received, the next high-voltage isolation instruction is responded to after the current isolation of the target electrical cabinet is completed.

9. The high voltage isolation method of an electric cabinet according to any one of claims 1 to 6, characterized in that: The method further comprises: After receiving the high-voltage isolation instruction, in the process of responding to the high-voltage isolation instruction, if a normal high-voltage lowering instruction or a high-voltage power-off instruction for a preset level fault is received for the energy storage system, respond to the normal high-voltage lowering instruction or the high-voltage power-off instruction for a preset level fault; If a high voltage power-off command for a preset level fault of the energy storage system is received during the process of responding to the normal high voltage power-off command, the preset level fault high voltage power-off command is responded to.

10. A high voltage isolation method for an electric cabinet, characterized in that: Applied to an energy management system, the method comprises: According to the target data of the energy storage system, a target electric cabinet to be isolated by high voltage in the energy storage system is determined, and a high voltage isolation instruction of the target electric cabinet is generated, wherein the high voltage isolation instruction instructs the target electric cabinet to be powered off by high voltage; Sending the high voltage isolation instruction to a battery management unit; Receive a first high-voltage isolation result based on the high-voltage isolation instruction feedback from the battery management unit, wherein the first high-voltage isolation result is the first high-voltage isolation result of the target electrical cabinet determined by responding to the high-voltage isolation instruction when the battery management unit detects that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, isolating the target electrical cabinet, and the non-high-voltage power-off state includes a high-voltage non-power-on state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; the first high-voltage isolation result is the result of the target electrical cabinet executing high-voltage power-off; the first high-voltage isolation result is the first high-voltage isolation result of the target electrical cabinet determined based on the result of high-voltage power-off when the battery management unit detects that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, without responding to the high-voltage isolation instruction and executing the high-voltage power-off process.

11. The high voltage isolation method of an electric cabinet according to claim 10, characterized in that: The step of determining, according to target data of the energy storage system, a target electrical cabinet to be isolated by high voltage in the energy storage system comprises: Perform fault or abnormality detection based on historical operation data and / or real-time processing data of the energy storage system to determine a first isolation electric cabinet; Determining a second isolation electric cabinet according to the received isolation information; The target electric cabinet includes at least one of the first isolated electric cabinet and the second isolated electric cabinet; The target data includes at least one of the historical operation data, the real-time processing data and the isolation information.

12. The high voltage isolation method of an electric cabinet according to claim 10, characterized in that: The method further comprises: When the first high-voltage isolation result is received, an assignment instruction is sent to the battery management unit, wherein the assignment instruction sets the high-voltage isolation instruction of the target electrical cabinet from the first instruction value to the second instruction value.

13. A high voltage isolation device for an electric cabinet, characterized in that: Applied to the battery management unit, the high voltage isolation device of the electric cabinet includes: A first receiving module is used to receive a high-voltage isolation instruction of an electric cabinet of the energy management system; the high-voltage isolation instruction indicates a target electric cabinet to be isolated; A first determination module is used to respond to the high-voltage isolation instruction to isolate the target electrical cabinet and determine a first high-voltage isolation result of the target electrical cabinet when it is detected that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, wherein the non-high-voltage power-off state includes a non-high-voltage state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; the first high-voltage isolation result indicates the result of the target electrical cabinet executing the high-voltage power-off; and, When it is detected that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, the high-voltage isolation instruction is not responded to, a high-voltage power-off process is executed, and a first high-voltage isolation result of the target electric cabinet is determined based on the result of the high-voltage power-off; The first sending module is used to provide feedback to the energy management system based on the first high-voltage isolation result.

14. A high voltage isolation device for an electric cabinet, characterized in that: Applied to energy management system, the high voltage isolation device of the electric cabinet includes: A second determination module is used to determine a target electric cabinet to be isolated by high voltage in the energy storage system according to target data of the energy storage system, and generate a high voltage isolation instruction for the target electric cabinet, wherein the high voltage isolation instruction instructs to power off the target electric cabinet by high voltage; A second sending module, used for sending the high voltage isolation instruction to the battery management unit; The second receiving module is used to receive a first high-voltage isolation result fed back by the battery management unit based on the high-voltage isolation instruction, wherein the first high-voltage isolation result is that when the battery management unit detects that the high-voltage processing state of the energy storage system is in a non-high-voltage power-off state, the battery management unit responds to the high-voltage isolation instruction, isolates the target electrical cabinet, and determines the first high-voltage isolation result of the target electrical cabinet, wherein the non-high-voltage power-off state includes a high-voltage non-on state, a high-voltage power-on process in progress, and a high-voltage power-on completion state; the first high-voltage isolation result is a result of the target electrical cabinet executing high-voltage power-off; the first high-voltage isolation result is that when the battery management unit detects that the high-voltage processing state of the energy storage system is in a high-voltage power-off state, the battery management unit does not respond to the high-voltage isolation instruction, executes the high-voltage power-off process, and determines the first high-voltage isolation result of the target electrical cabinet based on the high-voltage power-off result.

15. A high voltage isolation device for an electric cabinet, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the steps in the method according to any one of claims 1 to 12 are implemented.

16. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are implemented.

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