Electrochemical energy storage battery box maintenance device and method

Abstract

A device and method for maintaining an electrochemical energy storage battery box. The device includes a microcontroller unit (MCU), a drive circuit module, a power module, a communication module, a primary circuit, and a primary circuit interface. The power module provides power to the device. The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery box to be maintained and sends it to the microcontroller unit (MCU). The microcontroller unit (MCU) controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery box to be maintained is bypassed or connected from the battery system. The primary circuit interface is used to be connected in parallel with the battery box to be maintained. The method bypasses, connects, or replaces the battery box to be maintained based on the device. The device and method provided by the present invention are simple, convenient, fast, flexible, and efficient. When applied to an electrochemical energy storage system, they simplify the fault repair process, shorten the fault maintenance time, improve system utilization, and solve the problems of difficult operation and maintenance of faulty battery boxes and long system offline time.

Description

Technical Field

[0001] The present invention relates to the technical field of electrochemical energy storage, and in particular to a device and method for maintaining an electrochemical energy storage battery box. Background Art

[0002] In recent years, with the rapid development of electrochemical energy storage power stations, corresponding problems have also increased, mainly including on-site safety commissioning issues, substandard capacity, low energy utilization, long downtime due to faults, complex maintenance, and the need for a large number of operation and maintenance personnel. In order to promote the healthy and sustainable development of electrochemical energy storage power stations and ensure their safe, stable and long-term operation, the present invention proposes a method and device for rapid maintenance of electrochemical energy storage battery boxes. Compared with traditional battery balancing maintenance instruments that require manual data screening, parameter setting, low maintenance efficiency, and manual real-time monitoring, the method and device of the present invention utilize their identification, communication, bypass, access, prompting, balancing, protection and other functions without affecting the normal operation of the battery system to achieve rapid maintenance of parameters such as voltage and SOC of the target battery box or replacement of the target battery box, realize automatic and rapid online balancing, and improve system utilization efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide an electrochemical energy storage battery box maintenance device and method to solve the problems of long downtime, difficulty in eliminating faults, and low system utilization of energy storage systems.

[0004] The present invention also aims to provide an electrochemical energy storage battery box maintenance device and method, which utilizes the system's charge and discharge control strategy and the specific status and self-charge and discharge functions of the target battery box to quickly maintain battery boxes with poor consistency, shorten fault downtime, operate simply and efficiently, and improve the energy utilization rate of the energy storage system.

[0005] A first aspect of the present invention provides an electrochemical energy storage battery box maintenance device, comprising a microcontroller unit MCU, a drive circuit module, a power module, a communication module, a primary circuit and a primary circuit interface;

[0006] The power module provides power to the device;

[0007] The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery plug-in box to be maintained, and sends the parameter information to the microcontroller unit MCU. The microcontroller unit MCU controls the operation of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected;

[0008] The primary circuit interface is used to be connected in parallel with the battery plug-in box to be maintained.

[0009] Furthermore, the primary circuit includes a switch quantity module, which includes a first switch K1, a second switch K2, and a third switch K3 connected in parallel; one side of the first switch K1, the second switch K2, and the third switch K3 are primary circuit interfaces for connecting to the battery box to be maintained, and the other sides are connected together;

[0010] The battery plug-in box to be maintained includes battery plug-in boxes A which are adjacently plugged into the battery system in sequence. n 、Battery box A n+1 and battery box A n+2 , among which, battery box A n+1 Insert the target battery into the box;

[0011] When the primary circuit is connected in parallel with the battery box to be maintained through the primary circuit interface, the first switch K1 is connected to the battery box A. n 、Battery box A n+1 Between the second switch K2 and the battery box A n+1 Close to battery box A n+2 The third switch K3 is connected to the battery box A n+2 Close to battery box A n+1 One side connection.

[0012] Furthermore, the microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected, including:

[0013] When the microcontroller unit MCU determines that the target battery box is abnormal according to the parameter information, it controls the driving circuit module to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery box A n+1 Bypassed;

[0014] When the microcontroller unit MCU determines that the target battery box has reached a normal state according to the parameter information, it controls the driving circuit module to open the first switch K1, close the second switch K2, and keep the third switch K3 in a closed state, so that the target battery box A n+1 Be connected.

[0015] Furthermore, when the target battery compartment is filled or emptied before other battery compartments in the battery system, the microcontroller unit MCU controls the drive circuit module to bypass the target battery compartment, and the primary circuit of the maintenance device is connected in series to the main circuit of the battery system;

[0016] When the other battery plug-in boxes in the battery system are fully charged or emptied and left to stand for a predetermined time, the communication module detects that the parameters of the target plug-in box are consistent with the parameters of other plug-in boxes in the battery system, and the micro control unit MCU controls the driving circuit module to connect the target battery plug-in box to the battery system.

[0017] Furthermore, the microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected, including:

[0018] When the microcontroller unit MCU determines that the target battery box needs to be replaced according to the parameter information, it controls the driving circuit module to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery box A n+1 when the new battery box is replaced, the control drive circuit module disconnects the first switch K1, closes the second switch K2, and the third switch K3 is in a closed state, so that the new battery box is connected.

[0019] Furthermore, it also includes a self-protection module;

[0020] When the micro control unit MCU determines that an abnormality occurs in the main circuit of the battery system, it controls the self-protection module to start, so as to disconnect the maintenance device from the battery system.

[0021] Furthermore, it also includes a human-computer interaction module for displaying parameter information, control information and / or warning information.

[0022] A second aspect of the present invention provides a maintenance method for the electrochemical energy storage battery box maintenance device as described above, comprising:

[0023] Real-time monitoring of parameter information of each battery plug-in box in the battery system;

[0024] When the parameter information of a battery plug-in box is abnormal, it is determined whether it is a battery plug-in box to be maintained according to the preset judgment conditions;

[0025] If yes, connect the maintenance device to the battery box to be maintained via the primary circuit interface;

[0026] The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery plug-in box to be maintained, and sends the parameter information to the microcontroller unit MCU. The microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected.

[0027] In summary, the present invention proposes a device and method for maintaining an electrochemical energy storage battery box. The device includes a microcontroller unit (MCU), a drive circuit module, a power module, a communication module, a primary circuit, and a primary circuit interface. The power module provides power to the device. The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery box to be maintained and sends it to the microcontroller unit (MCU). The microcontroller unit (MCU) controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery box to be maintained is bypassed or connected from the battery system. The primary circuit interface is used to be connected in parallel with the battery box to be maintained. The method bypasses, connects, or replaces the battery box to be maintained based on the device. The device and method provided by the present invention are simple, convenient, fast, flexible, and efficient. When applied to an electrochemical energy storage system, they simplify the fault repair process, shorten the fault maintenance time, improve system utilization, and solve the problems of difficult operation and maintenance of faulty battery boxes and long system offline time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of bypassing a target battery box in an embodiment of the present invention.

[0029] Figure 2 Schematic diagram of connecting a target battery box to the target battery box according to an embodiment of the present invention.

[0030] Figure 3 The present invention provides a flow chart of a method for maintaining an electrochemical energy storage battery box. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0032] In a first aspect, the present invention provides an electrochemical energy storage battery compartment maintenance device, comprising a microcontroller (MCU), a drive circuit module, a power module, a communication module, a primary circuit, and a primary circuit interface. The power module provides power to the device. The communication module communicates with the battery management unit (BMU) of the battery system to obtain parameter information of the battery compartment to be maintained and transmits it to the MCU. The MCU controls the operation of the primary circuit via the drive circuit module based on the parameter information, thereby bypassing or connecting the battery compartment to be maintained from the battery system. The primary circuit interface is used to connect in parallel with the battery compartment to be maintained. Communication methods between the device and the BMU include, but are not limited to, CAN, 485, and wireless.

[0033] Furthermore, the primary circuit includes a switch quantity module, which includes a first switch K1, a second switch K2, and a third switch K3 connected in parallel; one side of the first switch K1, the second switch K2, and the third switch K3 are respectively primary circuit interfaces for connecting to the battery plug-in box to be maintained, and the other sides are connected together; the battery plug-in box to be maintained includes battery plug-in boxes A that are adjacently plugged into the battery system in sequence. n 、Battery box A n+1 and battery box A n+2 , among which, battery box A n+1 When the primary circuit is connected in parallel with the battery plug box to be maintained through the primary circuit interface, the first switch K1 is connected to the battery plug box A n 、Battery box A n+1 Between the second switch K2 and the battery box A n+1 Close to battery box A n+2 The third switch K3 is connected to the battery box A n+2 Close to battery box A n+1 One side connection.

[0034] Furthermore, the microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery box to be maintained is bypassed or connected from the battery system, including: when the microcontroller unit MCU determines that the target battery box is abnormal according to the parameter information, the drive circuit module is controlled to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery box A is bypassed or connected. n+1 When the microcontroller unit MCU determines that the target battery box has reached a normal state according to the parameter information, it controls the drive circuit module to open the first switch K1, close the second switch K2, and the third switch K3 is in a closed state, so that the target battery box A n+1The parameters of the target battery box failure or abnormality may include but are not limited to SOC, SOH, voltage, temperature, internal resistance, self-discharge rate, insulation, etc.

[0035] Furthermore, when the target battery compartment is fully charged or discharged before the other battery compartments in the battery system, the microcontroller unit (MCU) controls the drive circuit module to bypass the target battery compartment, and the primary circuit of the maintenance device is connected in series with the main circuit of the battery system. After the other battery compartments in the battery system are fully charged or discharged and allowed to rest for a predetermined period, and the communication module detects that the parameters of the target compartment are consistent with those of the other compartments in the battery system, the microcontroller unit (MCU) controls the drive circuit module to connect the target battery compartment to the battery system. If the battery management unit of the battery system detects that the parameters of the target battery compartment are abnormal but do not require replacement, it monitors the location and parameters of the target battery compartment in real time and, using the system's charge and discharge control strategy, automatically balances the target compartment to ensure consistent operation with the system parameters. Based on the system's charge and discharge control strategy, the device automatically adjusts the parameters of the target battery compartment online while ensuring continuous system operation. Parameter maintenance utilizes the system's charge and discharge functions to automatically maintain parameters such as SOC and voltage by controlling the timing of bypassing and connecting the target battery compartment.

[0036] Furthermore, the microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug box to be maintained is bypassed or connected from the battery system, including: when the microcontroller unit MCU determines that the target battery plug box needs to be replaced according to the parameter information, the drive circuit module is controlled to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery plug box A is replaced. n+1 Bypassed; when a new battery compartment is replaced, the drive circuit module is controlled to open the first switch K1, close the second switch K2, and keep the third switch K3 closed, allowing the new battery compartment to be connected. The battery management unit of the battery system detects a fault in the target battery compartment. After the replacement, it obtains real-time information such as the location and parameters of the target battery compartment and uses the system's charge and discharge control strategy to automatically balance the target compartment to meet operating requirements consistent with system parameters.

[0037] Furthermore, the device also includes a self-protection module. When the microcontroller unit (MCU) determines that an abnormality has occurred in the battery system's main circuit, it activates the self-protection module to disconnect the maintenance device from the battery system. The self-protection module, which includes but is not limited to components such as fuses and is installed at the primary circuit outlet within the device, provides self-protection and protection for the system in which it resides when an abnormality occurs.

[0038] Furthermore, a human-computer interaction module is included to display parameter information, control information and / or warning information. According to the specific status of the target battery box, bypass maintenance or replacement prompts can be implemented.

[0039] Specifically, when the battery management unit indicates that the parameters of the target battery box are higher or lower than those of other battery boxes in the system, a rapid automatic maintenance device is used, which is fixed through a primary interface and connected in parallel with the target battery box, eliminating the need to add a separate location for the device within the system. This device draws power from the external mains or primary circuit interface via a power module, after which the communication module obtains the target battery box parameter information from the battery management unit in order to bypass the target battery box. The microcontroller unit controls the on and off of the primary circuit switch via a drive circuit module to bypass and connect the target battery box. If the battery box needs to be replaced, there is no need to consider the charge state of the newly replaced battery box. At the same time, this device is not limited by the system voltage or battery box specifications. After the target battery box is full or empty, it is bypassed, and the primary circuit of the device is connected in series in the main circuit of the system to ensure that the system outputs normally under the charging and discharging operating conditions. After the entire system is full or empty, the system will be idle for a period of time according to the control strategy. When the communication module detects that the parameters of the target box are consistent with the parameters of the box in the system, the maintenance is completed on the human-machine interface or with an audible and visual prompt. The device automatically connects the target battery box to the main circuit of the system to complete the automatic and rapid balancing maintenance of the battery box. During this process, if the battery management unit itself or the communication with the device fails, the device can identify it through parameter settings; if the parameters such as the system main circuit current are abnormal, the self-protection module of the device is activated, and the main circuit of the system is quickly cut off through a fuse or a drive circuit to ensure the safety of itself and the system. This method and device simplify the fault elimination process, improve the efficiency of fault maintenance, ensure the consistency of system parameters, and maximize the utilization of system capacity.

[0040] The present invention provides a rapid and automatic maintenance method for electrochemical energy storage battery boxes and a portable battery box balancing and maintenance device based on this method. These devices offer a strategy and device for controlling battery box failures in electrochemical energy storage systems. These devices are portable and plug-and-play, providing real-time control of faulty battery boxes. If multiple battery boxes in the same system fail, the corresponding number of maintenance devices can be used for automatic maintenance and control.

[0041] The present invention provides a rapid and automatic maintenance method for electrochemical energy storage battery boxes and a portable battery box balancing maintenance device based on this method. The maintenance method is simple and easy to operate. The device is lightweight, highly safe, easy to install and carry, and can operate in the system for a long time. If two or more battery boxes need to be bypassed simultaneously in the system, they can be used simultaneously.

[0042] The present invention provides a rapid and automatic maintenance method for an electrochemical energy storage battery box and a portable battery box balancing maintenance device based on the method, which mainly performs the functions and effects of bypassing, accessing, communicating, identifying, locating, prompting, and balancing a faulty battery box.

[0043] The present invention is further illustrated below using various application scenarios as examples. This embodiment provides a rapid and automatic maintenance device and method for electrochemical energy storage battery boxes, which largely address various issues with electrochemical energy storage systems, such as long downtime, difficulty recovering from faults, and the complexity and high cost of maintaining consistent battery box parameters. This method and device enable efficient, stable, and long-term grid-connected operation of energy storage systems, contributing to the rapid and vigorous development of the battery energy storage industry.

[0044] Example 1

[0045] When operating in multiple scenarios, especially at full power or high power, energy storage systems can experience inconsistencies in parameters such as voltage, temperature, and SOC. This can cause the entire system to prematurely shut down charging and discharging, impacting charging and discharging energy and efficiency. Worse still, abnormal performance parameters in a battery plug-in box can cause system downtime, reducing system utilization and, in severe cases, even causing the battery system to combust or explode, causing significant damage to power station equipment and personnel.

[0046] When the battery system is charging, if the battery management unit detects that the voltage, SOC, or temperature of one or more battery boxes is too high, or if the battery itself is abnormal and needs maintenance or replacement of the battery box, the fast automatic maintenance device can quickly bypass the faulty battery box without affecting the normal operation of the system.

[0047] During the charging process, the system A n+1 When the SOC of the battery box is significantly higher than that of other battery boxes in the system, use the fast automatic maintenance device to fix it in the main circuit of the system through the primary circuit interface and connect it in parallel with the target battery box. Power the device through the primary circuit interface or external mains power, and the communication module obtains the target battery box information from the battery management unit. The above is the preparation work, and the system continues to charge normally. When the A n+1 When the battery box is fully charged, the control unit controls the on and off of the primary circuit switch through the drive circuit module, bypassing the target battery box, as shown in 1, closing K1 and K3, and turning A n+1 The battery box is bypassed, and other battery boxes in the system are charged normally. When all other battery boxes are fully charged, the system will be idle for a while, and the device will prompt the maintenance completion through the human-machine interface or sound and light. Figure 2 As shown, disconnect K1, close K2, and connect the bypassed A n+1The battery plug-in box enables rapid, automatic maintenance of battery plug-ins with SOC levels above the equilibrium point. Throughout the entire process, if communication equipment failures occur in data collection and transmission, diagnostic analysis can be performed based on experience and parameter settings. If the system experiences parameter anomalies such as a sudden current surge, the device's self-protection module uses a fuse or drive circuit to shut down the primary circuit interface, protecting itself and the system.

[0048] During the charging process, the system A n+1 When the voltage of the battery box is significantly lower than that of other battery boxes, the system will continue to charge. When the remaining battery boxes are fully charged, the A n+1 The battery box is not fully charged, and the system enters the discharge process normally. n+1 The voltage of the battery box is significantly lower than that of other battery boxes. n+1 First empty. At this time, as shown in 1, close K1 and K3, and put the A n+1 The battery box is bypassed, and the other battery boxes in the system are discharged normally. When all other battery boxes are discharged, the system will be idle for a period of time. Figure 2 As shown, disconnect K1, close K2, and connect the bypassed A n+1 Battery box, to achieve rapid and automatic maintenance of battery boxes with voltage below the balance point.

[0049] Example 2

[0050] Energy storage systems are being applied in increasingly diverse scenarios, with varying operating conditions. When operating conditions change or the energy storage system has been in operation for too long, the performance of the battery plug-in units will significantly decline due to aging or increased charge and discharge currents. This in turn exacerbates the inconsistency of operating parameters between battery plug-ins, causing widespread downtime of the energy storage system and the loss of the energy storage power station's ability to operate online and connected to the grid. This can lead to certain economic losses for the owner and poses safety risks to the energy storage system.

[0051] When the battery system is discharging, if the battery management unit detects that the voltage, SOC, or temperature of one or more battery boxes is low, or if the battery itself is abnormal and needs maintenance or replacement of the battery box, the fast automatic maintenance device can quickly bypass the faulty battery box without affecting the normal operation of the system.

[0052] During the discharge process, the system A n+1 When the SOC of the battery box is significantly lower than that of other battery boxes, the system continues to discharge normally. n+1 When the battery box is empty, as shown in 1, close K1 and K3, and put the A n+1 The battery box is bypassed, and the other battery boxes in the system are discharged normally. When all other battery boxes are discharged, the system will be idle for a period of time. Figure 2As shown, disconnect K1, close K2, and connect the bypassed A n+1 Battery plug-in box, to achieve rapid and automatic maintenance of battery plug-in box with SOC below the balance point.

[0053] During the discharge process, the system A n+1 When the voltage of the battery box is significantly higher than that of other battery boxes, the system continues to discharge. When the remaining battery boxes are empty, the A n+1 The battery box is not empty, the system enters the charging process normally, due to A n+1 The voltage of the battery box is significantly higher than that of other battery boxes. n+1 The battery box is fully charged first. At this time, as shown in 1, K1 and K3, put the A n+1 The other battery boxes in the system will be charged normally. When all other battery boxes are fully charged, the system will be idle for a while. Figure 2 As shown, disconnect K1, close K2, and connect the bypassed A n+1 Battery plug-in box, realizes fast and automatic maintenance of battery plug-in box with voltage higher than the balance point.

[0054] Example 3

[0055] During the discharge process, the system A n+1 When the battery box has an abnormality, such as high temperature, large temperature difference and battery failure caused by individual differences of battery cells, poor grouping process, or loose screws, the system consistency requirements cannot be met through maintenance and balancing, and the battery box needs to be replaced. Use a fast automatic maintenance device to fix it in the main circuit of the system through the primary circuit interface and connect it in parallel with the target battery box. The device draws power through the primary circuit interface or external AC power. The control unit controls the on and off of the primary circuit switch through the drive circuit module, bypassing the target battery box, as shown in 1, closing K1 and K3, and turning on the A n+1 The battery box is bypassed, and other battery boxes in the system are discharged normally, and then a new battery box is replaced. The communication module obtains the information of the newly replaced battery box from the battery management unit. The newly replaced battery box is not limited by its SOC. After the new box is replaced, Figure 2 As shown, K1 is disconnected, K2 is closed, and the newly replaced battery plug box is connected. The method for maintaining the consistency of the newly replaced battery plug box and the system parameters is then carried out according to the specific situation according to Example 1 and Example 2.

[0056] The second aspect of the present invention provides a maintenance method for the electrochemical energy storage battery box maintenance device as described above, such as Figure 3 As shown, the following steps are included:

[0057] Step S100, real-time monitoring of parameter information of each battery plug-in box in the battery system;

[0058] Step S200: When the parameter information of a battery plug-in box is abnormal, it is determined whether it is a battery plug-in box to be maintained according to a preset judgment condition;

[0059] Step S300: If yes, connect the maintenance device to the battery box to be maintained via the primary circuit interface;

[0060] In step S400, the communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery plug-in box to be maintained, and sends the parameter information to the microcontroller unit MCU. The microcontroller unit MCU controls the operation of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected.

[0061] In summary, the present invention proposes a device and method for maintaining an electrochemical energy storage battery box. The device includes a microcontroller unit (MCU), a drive circuit module, a power module, a communication module, a primary circuit, and a primary circuit interface. The power module provides power to the device. The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery box to be maintained and sends it to the microcontroller unit (MCU). The microcontroller unit (MCU) controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery box to be maintained is bypassed or connected from the battery system. The primary circuit interface is used to be connected in parallel with the battery box to be maintained. The method bypasses, connects, or replaces the battery box to be maintained based on the device. The device and method provided by the present invention are simple, convenient, fast, flexible, and efficient. When applied to an electrochemical energy storage system, they simplify the fault repair process, shorten the fault maintenance time, improve system utilization, and solve the problems of difficult operation and maintenance of faulty battery boxes and long system offline time.

[0062] It should be understood that the above-described specific embodiments of the present invention are merely illustrative or illustrative of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the scope of protection of the present invention. In addition, the appended claims are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. An electrochemical energy storage battery box maintenance device, characterized in that: It includes a microcontroller unit MCU, a drive circuit module, a power supply module, a communication module, a primary circuit and a primary circuit interface; The power module provides power to the device; The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery plug-in box to be maintained, and sends the parameter information to the microcontroller unit MCU. The microcontroller unit MCU controls the operation of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected; The primary circuit interface is used to be connected in parallel with the battery plug-in box to be maintained; The primary circuit includes a switch quantity module, which includes a first switch K1, a second switch K2, and a third switch K3 connected in parallel; one side of the first switch K1, the second switch K2, and the third switch K3 are primary circuit interfaces for connecting to the battery box to be maintained, and the other sides are connected together; The battery plug-in box to be maintained includes battery plug-in boxes A which are adjacently plugged into the battery system in sequence. n 、Battery box A n+1 and battery box A n+2 , among which, battery box A n+1 Insert the target battery into the box; When the primary circuit is connected in parallel with the battery box to be maintained through the primary circuit interface, the first switch K1 is connected to the battery box A. n 、Battery box A n+1 Between the second switch K2 and the battery box A n+1 Close to battery box A n+2 The third switch K3 is connected to the battery box A n+2 Close to battery box A n+1 One side connection.

2. The electrochemical energy storage battery box maintenance device according to claim 1, characterized in that: The microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected, including: When the microcontroller unit MCU determines that the target battery box is abnormal according to the parameter information, it controls the driving circuit module to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery box A n+1 Bypassed; When the microcontroller unit MCU determines that the target battery box has reached a normal state according to the parameter information, it controls the driving circuit module to open the first switch K1, close the second switch K2, and keep the third switch K3 in a closed state, so that the target battery box A n+1 Be connected.

3. The electrochemical energy storage battery box maintenance device according to claim 2, characterized in that: When the target battery compartment is filled or emptied before other battery compartments in the battery system, the microcontroller unit MCU controls the drive circuit module to bypass the target battery compartment, and the primary circuit of the maintenance device is connected in series to the main circuit of the battery system; When the other battery plug-in boxes in the battery system are fully charged or emptied and left to stand for a predetermined time, the communication module detects that the parameters of the target plug-in box are consistent with the parameters of other plug-in boxes in the battery system, and the micro control unit MCU controls the driving circuit module to connect the target battery plug-in box to the battery system.

4. The electrochemical energy storage battery box maintenance device according to claim 1, characterized in that: The microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected, including: When the microcontroller unit MCU determines that the target battery box needs to be replaced according to the parameter information, it controls the driving circuit module to close the first switch K1 and the third switch K3, and the second switch K2 is in the open state, so that the target battery box A n+1 when the new battery box is replaced, the control drive circuit module disconnects the first switch K1, closes the second switch K2, and the third switch K3 is in a closed state, so that the new battery box is connected.

5. The electrochemical energy storage battery box maintenance device according to any one of claims 1 to 4, characterized in that: Also includes a self-protection module; When the micro control unit MCU determines that an abnormality occurs in the main circuit of the battery system, it controls the self-protection module to start, so as to disconnect the maintenance device from the battery system.

6. The electrochemical energy storage battery box maintenance device according to claim 5, characterized in that: It also includes a human-computer interaction module for displaying parameter information, control information and / or warning information.

7. A maintenance method for the electrochemical energy storage battery box maintenance device according to any one of claims 1 to 6, characterized in that: include: Real-time monitoring of parameter information of each battery plug-in box in the battery system; When the parameter information of a battery plug-in box is abnormal, it is determined whether it is a battery plug-in box to be maintained according to the preset judgment conditions; If yes, connect the maintenance device to the battery box to be maintained via the primary circuit interface; The communication module communicates with the battery management unit of the battery system to obtain parameter information of the battery plug-in box to be maintained, and sends the parameter information to the microcontroller unit MCU. The microcontroller unit MCU controls the action of the primary circuit through the drive circuit module according to the parameter information, so that the battery plug-in box to be maintained is bypassed from the battery system or connected.

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