Energy storage module charging and discharging device

Abstract

This application provides an energy storage module charging and discharging device, including a first cell equalization module, a sampling harness adapter module, and an indicator module. A first sub-adaptor and a second sub-adaptor among a plurality of first adapter terminals are electrically connected to the first cell equalization module. The plurality of first adapter terminals are also used to electrically connect to the sampling harness of a plurality of cells included in the energy storage module. The first sub-adaptor and the second sub-adaptor are respectively electrically connected to the positive and negative terminals of individual cells among the plurality of cells. The indicator module includes a plurality of indicator circuits, each corresponding to a plurality of cells. The input and output terminals of each indicator circuit are electrically connected to the positive and negative terminals of the corresponding cell through the plurality of first adapter terminals.

Description

[0001] This application claims priority to Chinese Patent Application No. 202423183324.1, filed on December 23, 2024, entitled "Energy Storage Module Charging and Discharging Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of energy storage technology, and in particular to an energy storage module charging and discharging device. Background Technology

[0003] Currently, charge-discharge equalization of individual cells in energy storage modules mainly involves unpacking and charging / discharging. This requires removing the energy storage module from the cluster rack, opening the module's casing, and then performing charge-discharge equalization on individual or multiple cells inside the module. Due to the significant weight of energy storage modules, this work is physically demanding and carries certain risks. Therefore, improving the stability of charge-discharge equalization for individual cells is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0004] This application provides a charging and discharging device for an energy storage module. The device includes a first cell equalization module that is electrically connected to the sampling harnesses at both ends of a single cell among multiple cells in the energy storage module via a first sub-transfer terminal and a second sub-transfer terminal. This allows the charging and discharging equalization device to perform charging and discharging equalization operations on a single cell by connecting to the first cell equalization module. This improves the stability and reliability of charging and discharging equalization on a single cell.

[0005] In a first aspect, embodiments of this application provide an energy storage module charging and discharging device, including a first cell balancing module, a sampling harness adapter module, and an indicator light module, wherein...

[0006] The sampling harness adapter module includes multiple first adapter terminals, among which the first sub-adapter terminal and the second sub-adapter terminal are electrically connected to the first cell equalization module;

[0007] The plurality of first adapter terminals are also used to electrically connect to the sampling harness of the plurality of cells included in the energy storage module, wherein the first sub-adapter terminal and the second sub-adapter terminal are respectively electrically connected to the positive and negative terminals of a single cell among the plurality of cells;

[0008] The indicator module includes multiple indicator circuits, each corresponding to a multiple battery cell. The input and output terminals of each indicator circuit are electrically connected to the positive and negative terminals of the corresponding battery cell through multiple first adapter terminals.

[0009] In one feasible example, there are multiple first cell balancing modules.

[0010] In one feasible example, the device further includes a second cell balancing module, wherein the second cell balancing module includes a plurality of connection terminals connected to the plurality of first adapter terminals.

[0011] In a feasible example, each indicator light circuit includes a light-emitting element and a protective resistor connected in series. The light-emitting element in each indicator light circuit is used to emit light based on the voltage across the battery cell when the sampling harness of the battery cell corresponding to each indicator light circuit is normally electrically connected to the first adapter terminal. The protective resistor is used to limit the current of the indicator light circuit.

[0012] In a feasible example, the brightness of the light-emitting element in each indicator circuit is determined according to the voltage across the battery cell corresponding to each indicator circuit, wherein, within a first preset voltage range, the brightness of the light-emitting element changes with the voltage value across the battery cell.

[0013] In a feasible example, the energy storage module charging and discharging device further includes multiple voltage testing modules, which are electrically connected to the multiple first adapter terminals; the multiple voltage testing modules are also used to connect to a first measuring device to realize the electrical connection between the first measuring device and the multiple first adapter terminals in the sampling harness adapter module, wherein the first measuring device is used to perform voltage measurement on at least one of the multiple battery cells.

[0014] In one feasible example, the plurality of first adapter terminals are used to connect the sampling harness of the target cell included in the energy storage module when the voltage of the target cell in the energy storage module is not within the second preset voltage range; the plurality of voltage testing modules are used to connect the first measuring device after the target cell in the energy storage module is connected to the plurality of first adapter terminals, so as to realize the electrical connection between the first measuring device and the target cell in the energy storage module.

[0015] In one feasible example, the energy storage module charging and discharging device further includes a temperature testing module, and the sampling harness adapter module further includes a second adapter terminal, wherein the temperature testing module is electrically connected to the second adapter terminal; the second adapter terminal is also used to electrically connect to a temperature probe in the energy storage module; the temperature testing module is used to realize the electrical connection between a second measuring device and the second adapter terminal, and the second measuring device is used to measure the resistance value of the temperature probe.

[0016] In one feasible example, the second adapter is used to connect a temperature probe in the energy storage module when the temperature in the energy storage module is not within a preset temperature range; the temperature testing module is used to connect the second measuring device after the temperature probe is connected to the second adapter, so as to realize the electrical connection between the second measuring device and the temperature probe.

[0017] In a feasible example, the energy storage module charging and discharging device further includes a self-resetting fuse resistor connected in series between the first adapter and the first cell balancing module. When a short circuit occurs in the circuit between the first adapter and the first cell balancing module, or when the current exceeds a preset current, the resistance value of the self-resetting fuse resistor increases to a first preset resistance value. When no short circuit occurs in the circuit between the first adapter and the first cell balancing module, and the current is not greater than a preset current, the resistance value of the self-resetting fuse resistor decreases to a second preset resistance value, which is less than the first preset resistance value.

[0018] In a feasible example, the energy storage module charging and discharging device includes an upper cover, a lower cover, and a circuit board installed between the upper cover and the lower cover. The circuit board includes a first cell balancing module, a second cell balancing module, a sampling harness adapter module, a voltage testing module, a temperature testing module, an indicator light module, and multiple self-resetting fuse resistors. The upper cover and / or the lower cover have openings corresponding to the modules included in the circuit board, and the upper cover and / or the lower cover include a marking for the module corresponding to each opening.

[0019] In one feasible example, the first cell balancing module is further configured to connect to a charge-discharge balancing device to enable the charge-discharge balancing device to connect to a single cell in the energy storage module. The charge-discharge balancing device is configured to perform charge-discharge balancing operations on a single cell among the multiple cells included in the energy storage module.

[0020] In one feasible example, the second cell balancing module is further configured to connect to a charge-discharge balancing device, so as to enable the charge-discharge balancing device to connect with multiple cells in the energy storage module, wherein the charge-discharge balancing device is configured to perform charge-discharge balancing operations on the multiple cells included in the energy storage module.

[0021] As can be seen, in this application, because the first cell equalization module included in the energy storage module charging and discharging device can be electrically connected to the sampling harness of a single cell among the multiple cells included in the energy storage module based on the first sub-transfer terminal and the second sub-transfer terminal among the multiple first transfer terminals, the charging and discharging equalization device can be connected to a single cell among the multiple cells in the energy storage module by connecting to the first cell equalization module, thereby realizing the charging and discharging equalization operation of a single cell among the multiple cells included in the energy storage module. Compared with unpacking the energy storage module and then performing charging and discharging equalization operation on a single cell, the stability and reliability of the charging and discharging equalization operation on a single cell are improved.

[0022] Meanwhile, the energy storage module charging and discharging device also includes a voltage testing module and a temperature testing module. The voltage testing module can measure the voltage across the battery cells when the Battery Management System (BMS) detects an abnormal voltage in a battery cell within the energy storage module, thereby initially locating the battery cells that require charge-discharge equalization. The temperature testing module can measure the voltage of the temperature probe inside the energy storage module when the BMS detects an abnormal temperature in the energy storage module, thereby determining the accuracy of the temperature anomaly detection performed by the BMS.

[0023] Furthermore, the energy storage module charging and discharging device also includes an indicator light module. By observing whether the light-emitting elements in the multiple indicator light circuits included in the indicator light module are lit, it can be determined whether the sampling harness of the battery cell and the sampling harness adapter module are properly connected. In addition, by observing the brightness of the light-emitting elements, it can also be determined whether the voltage at both ends of the battery cell is normal, thereby identifying the battery cell that needs to undergo charging and discharging equalization operation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an energy storage module charging and discharging device provided in an embodiment of this application;

[0026] Figure 2 A circuit topology diagram of an energy storage module cell is provided in an embodiment of this application;

[0027] Figure 3 A circuit topology diagram of a temperature probe for an energy storage module provided in an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of a sampling harness adapter module provided in an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of another sampling harness adapter module provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the structure of a first cell balancing module provided in an embodiment of this application;

[0031] Figure 7 A circuit topology diagram of another first cell balancing module provided in an embodiment of this application;

[0032] Figure 8 This is a schematic diagram of the structure of a voltage testing module provided in an embodiment of this application;

[0033] Figure 9 This is a schematic diagram of the structure of a temperature testing module provided in an embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the structure of a second cell balancing module provided in an embodiment of this application;

[0035] Figure 11 This is a schematic diagram of the overall structure of an energy storage module charging and discharging device provided in an embodiment of this application;

[0036] Figure 12 This is a schematic diagram of the overall structure of another energy storage module charging and discharging device provided in an embodiment of this application;

[0037] Figure 13 This application provides an overall disassembly diagram of an energy storage module charging and discharging device.

[0038] Figure 14 A schematic diagram of a circuit board structure provided in an embodiment of this application;

[0039] Figure 15 An overall disassembly diagram of another energy storage module charging and discharging device provided in the embodiments of this application;

[0040] Figure 16 This is a schematic diagram of another circuit board structure provided in an embodiment of this application.

[0041] Regarding the circuit section:

[0042] Cell1-8: Battery cells; BAT0A-BAT8A: Sampling harness; NTC1-NTC3: Temperature probe; RT1A-RT3A, RT1B-RT3B: Sampling terminals (temperature); BAT0-BAT8: Sampling terminals (voltage); 24-32: First adapter terminals; 16-18, 34-36: Second adapter terminals; F1-F9: Self-resetting fuse resistors; R1-R8: Protection resistors; J1-J8: First battery cell equalization module; LED1-LED8: Light-emitting elements;

[0043] Regarding the physical components:

[0044] 200: Upper cover; 300: Circuit board; 400: Lower cover; 301: First cell balancing module; 303: Sampling harness adapter module; 304: Temperature test module; 305: Voltage test module; 306: Indicator light circuit; 308: Self-resetting fuse resistor; 309: Second cell balancing module. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0046] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps is not limited to the steps listed, but may optionally include steps not listed, or may optionally include other steps inherent to these processes, methods, products, or apparatuses.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an energy storage module charging and discharging device provided in an embodiment of this application, as shown below. Figure 1As shown, the energy storage module charging and discharging device 100 includes a first cell equalization module 101 and a sampling harness conversion module 102.

[0049] The sampling harness adapter module 102 includes multiple first adapter terminals, and the first sub-adapter terminal and the second sub-adapter terminal among the multiple first adapter terminals are electrically connected to the first cell equalization module 101, respectively.

[0050] Multiple first adapter terminals are also used for electrical connection to the sampling harness of multiple battery cells included in the energy storage module 120, and the first sub-adapter terminal and the second sub-adapter terminal are respectively electrically connected to the positive and negative terminals of a single battery cell among the multiple battery cells.

[0051] The first cell balancing module 101 is also used to connect to the charge-discharge balancing device 110 so that the charge-discharge balancing device 110 can perform charge-discharge balancing operations on the individual cells included in the energy storage module 120 based on the first cell balancing module 101.

[0052] Understandably, the energy storage module 120 includes multiple battery cells connected in series. Among these series-connected cells, the sampling harness between two adjacent cells is connected to a single first adapter terminal. Simultaneously, when there are multiple first cell balancing modules 101, this single first adapter terminal is connected to two of the multiple first cell balancing modules 101. Based on the aforementioned multiple first adapter terminals, the sampling harnesses of the multiple cells in the energy storage module 120 are connected to the multiple first cell balancing modules 101, ensuring that each first cell balancing module 101 has a corresponding battery cell. Based on its connection to the corresponding first cell balancing module 101, the charge / discharge balancing device 110 can perform charge / discharge balancing operations on the corresponding battery cell.

[0053] For example, please refer to Figure 2 , Figure 2 A circuit topology diagram of an energy storage module cell is provided for an embodiment of this application, such as... Figure 2 As shown, the energy storage module includes eight cells connected in series: Cell1, Cell2, Cell3, Cell4, Cell5, Cell6, Cell7, and Cell8. Nine sampling harnesses (BAT0A-8A) are led out from each of the eight cells. Adjacent sampling harnesses are connected to the positive and negative terminals of their respective cells.

[0054] Sampling harnesses BAT0A and BAT1A are connected to the negative and positive terminals of cell 1, respectively; sampling harnesses BAT1A and BAT2A are connected to the negative and positive terminals of cell 2, respectively; sampling harnesses BAT2A and BAT3A are connected to the negative and positive terminals of cell 3, respectively; sampling harnesses BAT3A and BAT4A are connected to the negative and positive terminals of cell 4, respectively; sampling harnesses BAT4A and BAT5A are connected to the negative and positive terminals of cell 5, respectively; sampling harnesses BAT5A and BAT6A are connected to the negative and positive terminals of cell 6, respectively; sampling harnesses BAT6A and BAT7A are connected to the negative and positive terminals of cell 7, respectively; and sampling harnesses BAT7A and BAT8A are connected to the negative and positive terminals of cell 8, respectively.

[0055] Furthermore, in a feasible example, the energy storage module charging and discharging device further includes multiple voltage testing modules, which are electrically connected to the multiple first adapter terminals; the multiple voltage testing modules are also used to connect a first measuring device to realize the electrical connection between the first measuring device and the multiple first adapter terminals in the sampling harness adapter module, wherein the first measuring device is used to perform voltage measurement on at least one of the multiple battery cells.

[0056] Understandably, multiple voltage test modules correspond to multiple first adapter terminals. These multiple voltage test modules are connected to the multiple first adapter terminals, and after the multiple first adapter terminals are connected to the sampling harnesses of the multiple battery cells included in the energy storage module, the positive and negative terminals of each voltage test module can be connected to the positive and negative terminals of the corresponding battery cell. After the first measuring device is connected to the multiple voltage test modules, it can measure the voltage across the two ends of the multiple battery cells included in the energy storage module.

[0057] In this application, by introducing a voltage testing module, the voltage across the two ends of the battery cell can be measured through the first measuring device, thereby improving the practicality of the energy storage module charging and discharging device.

[0058] Based on this, in a feasible example, a plurality of first adapter terminals are used to connect the sampling harness of the cells included in the energy storage module when the voltage of at least one target cell in the energy storage module is not within a second preset voltage range; a plurality of voltage testing modules are used to connect the first measuring device after the cells included in the energy storage module are connected to the plurality of first adapter terminals, so as to realize the electrical connection between the first measuring device and the target cell in the energy storage module.

[0059] During normal operation, the energy storage module is monitored and managed by the battery management system, which monitors parameters such as voltage, current, and temperature. When the battery management system detects that the voltage of at least one target cell in the energy storage module is not within a second preset voltage range, multiple first adapter terminals in the sampling harness adapter module are connected to the sampling harness of the cells included in the energy storage module. Simultaneously, a voltage testing module corresponding to at least one target cell is connected to a first measuring device after the cells in the energy storage module are connected to the multiple first adapter terminals. This allows the first measuring device to measure the voltage of at least one target cell, thereby determining which cells require charge-discharge equalization based on the voltage measurement results. It is understood that the first measuring device measures the voltage of at least one target cell primarily to further determine whether the voltage of at least one target cell is truly abnormal (not within the second preset voltage range). In this embodiment, the second preset voltage range is determined based on the voltages of other cells in the energy storage module. The voltage of a target cell not being within the second preset voltage range indicates that the absolute value of the voltage difference between the target cell and other cells is greater than a preset threshold.

[0060] For example, multiple voltage test modules correspond to multiple first adapter terminals; the multiple voltage test modules are connected one by one to the multiple first adapter terminals, in Figure 2 Based on this, since multiple first adapter terminals are connected one by one to the sampling harnesses of multiple battery cells, at this time... Figure 2 The sampling harness is described in the context of a voltage testing module. If the battery management system detects abnormal cell voltages (no voltage or significantly lower than 3.2V) in cells Cell2 and Cell3 within the module, while the voltage of other cells in the energy storage module is 3.2V, then the positive and negative terminals of the first measuring device are connected to the voltage testing modules corresponding to sampling harnesses BAT1A and BAT3A, respectively, to measure the voltage between them. If the measured voltage is significantly lower than 3.2V or absent, it indicates an abnormal cell voltage; if the measured voltage is 6.4V, it indicates an abnormal connection in the sampling harness between cells Cell2 and Cell3, but the cell voltage itself is normal.

[0061] In this application, when the battery management system determines that the cell voltage is abnormal, the cell voltage can be further confirmed by connecting a voltage testing module to a first measuring device.

[0062] Furthermore, in a feasible example, the energy storage module charging and discharging device further includes a temperature testing module, and the sampling harness adapter module further includes a second adapter terminal, wherein the temperature testing module is electrically connected to the second adapter terminal; the second adapter terminal is also used to electrically connect to a temperature probe in the energy storage module; the temperature testing module is used to realize the electrical connection between a second measuring device and the second adapter terminal, and the second measuring device is used to measure the resistance value of the temperature probe.

[0063] Understandably, the number of second adapter terminals and the number of temperature testing modules are both even. Each temperature testing module is connected to one of the second adapter terminals, allowing the temperature probes of the energy storage module to measure the temperature within the module. The corresponding two second adapter terminals are connected to both ends of a single temperature probe. Furthermore, the temperature testing module is also used to connect to the second measuring device corresponding to each temperature probe, enabling the second measuring device to measure the resistance value of the temperature probe.

[0064] In this application, a temperature testing module is introduced, which can measure the resistance value of the temperature probe in the energy storage module through a second measuring device, thereby improving the practicality of the energy storage module charging and discharging device.

[0065] Based on this, in a feasible example, multiple second adapter terminals are used to connect a temperature probe in the energy storage module when the temperature in the energy storage module is not within a preset temperature range; the temperature testing module is used to connect a second measuring device after the temperature probe is connected to the second adapter terminal, so as to realize the electrical connection between the second measuring device and the temperature probe.

[0066] When the battery management system (BMS) detects a temperature anomaly (temperature outside the preset temperature range) in the energy storage module using a temperature probe, multiple second adapters connect to the probe. Subsequently, multiple temperature testing modules connect to a second measuring device to measure the resistance of the temperature probe. The BMS then determines the accuracy of its assessment of the temperature anomaly based on the probe's resistance value. If the measured resistance value is normal (within the preset range), the temperature probe is functioning correctly, and the BMS's assessment of the temperature anomaly is accurate. The cause of the temperature being outside the preset range may be an external wiring harness connection or a software malfunction in the BMS. Conversely, if the measured resistance value is abnormal (outside the preset range), the BMS's assessment may be inaccurate, and the cause may be a faulty temperature probe, requiring replacement.

[0067] For example, please refer to Figure 3 , Figure 3 A circuit topology diagram of a temperature probe for an energy storage module provided in this application embodiment is shown below. Figure 3 As shown, the device includes temperature probes NTC1, NTC2, and NTC3. The two ends of temperature probe NTC1 are connected to sampling terminals RT1A and RT1B, respectively; the two ends of temperature probe NTC2 are connected to sampling terminals RT2A and RT2B, respectively; and the two ends of temperature probe NTC3 are connected to sampling terminals RT3A and RT3B, respectively.

[0068] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of a sampling harness adapter module provided in an embodiment of this application, as shown below. Figure 4 As shown, the sampling harness adapter module includes adapter terminals 1-36. Adapter terminals 24-32 are the first adapter terminals, corresponding to the aforementioned sampling harnesses BAT0A-8A, respectively. Adapter terminals 16-18 and 34-36 are the second adapter terminals. Adapter terminals 16 and 34 are two corresponding second adapter terminals, as are adapter terminals 17 and 35, and adapter terminals 18-36. Adapter terminals 16-18 are connected to sampling terminals RT3A-1A, and adapter terminals 34-36 are connected to sampling terminals RT3B-1B. The other adapter terminals are spare adapter terminals, used when needed.

[0069] In this application, when the battery management system detects an abnormal temperature within the energy storage module, a second sampling interface can be connected to a second measuring device to further confirm the cause of the fault by measuring the resistance value of the temperature probe.

[0070] Please refer to the following: Figure 5 , Figure 5 This is a schematic diagram of another sampling harness adapter module provided in an embodiment of this application, as shown below. Figure 5 As shown, the sampling harness adapter module includes adapter terminals 1-16. This sampling harness adapter module only includes the first adapter terminal; adapter terminals 2-7 and 9-15 are based on... Figure 5 The methods shown correspond to sampling harnesses BAT0A-8A respectively.

[0071] After measuring the cell voltage and the resistance of the temperature probe of the connected cell in the manner described in the foregoing embodiment, a charge-discharge equalization device is used to connect to the first cell equalization module that requires charge-discharge equalization operation, thereby performing charge-discharge equalization operation on the corresponding cell.

[0072] For example, please refer to Figure 6 , Figure 6 A schematic diagram of the structure of a first cell balancing module provided in an embodiment of this application is shown below. Figure 6As shown, the first cell balancing module includes a port for connecting to the first adapter and a port for connecting to the charge / discharge balancing device. Figure 6 In the first cell balancing module, positive port 1 and negative port 2 refer to the ports used to connect to the charge / discharge balancing device. Figure 6 In the first cell balancing module, positive port 3 and negative port 4 refer to the first sub-transfer terminal and the second sub-transfer terminal among multiple first transfer terminals. These first and second sub-transfer terminals can be... Figure 2 The sampling harnesses BAT0A and BAT1A corresponding to Cell1 are from the CNC chip.

[0073] Furthermore, in a feasible example, the energy storage module charging and discharging device also includes an indicator light module, which includes multiple indicator light circuits corresponding to multiple battery cells. The input and output terminals of each indicator light circuit are electrically connected to the positive and negative terminals of the battery cell corresponding to each indicator light circuit through the multiple first adapter terminals.

[0074] In this system, multiple indicator light circuits correspond to multiple battery cells. When there are multiple first-cell balancing modules, each module can correspond to a specific battery cell within the energy storage module. Similarly, the multiple indicator light circuits can also correspond to multiple first-cell balancing modules. These indicator light circuits illuminate upon receiving voltage, indicating to the user that an input voltage is present in the device.

[0075] In this application, an indicator light circuit is introduced, which can be used to determine whether there is an input voltage inside the device, thereby improving the practicality of the energy storage module charging and discharging device.

[0076] Specifically, in a feasible example, each indicator light circuit includes a light-emitting element and a protective resistor connected in series. The light-emitting element in each indicator light circuit is used to emit light based on the voltage across the battery cell when the sampling harness of the corresponding battery cell of each indicator light circuit is normally electrically connected to the first adapter terminal. The protective resistor is used to limit the current of the indicator light circuit.

[0077] Each indicator light circuit can be composed of a series-connected light-emitting element and a protective resistor. The indicator light's illumination is primarily based on the light-emitting element. When the sampling harness at both ends of the corresponding battery cell is properly connected to the first adapter terminal, the light-emitting element will illuminate based on the voltage across the battery cell. Therefore, when the indicator light is illuminating normally, it indicates a normal connection between the sampling harness at both ends of the battery cell and the first adapter terminal; when the indicator light is not illuminating, it indicates a disconnection between the sampling harness at both ends of the battery cell and the first adapter terminal. The protective resistor is used to limit the current in the indicator light circuit, thereby preventing excessive current from causing the light-emitting element to malfunction.

[0078] In this application, whether the indicator light circuit illuminates can be used to further determine whether the connection between the battery cell and the first adapter in the energy storage module is normal.

[0079] Specifically, in a feasible example, the brightness of the light-emitting element in each indicator circuit is determined according to the voltage across the battery cell corresponding to each indicator circuit. Within a first preset voltage range, the brightness of the light-emitting element changes with the voltage across the battery cell.

[0080] The brightness of the light-emitting element can be varied. Within a first preset voltage range, the higher the voltage across the battery cell, the brighter the light-emitting element will be. This allows the indicator light circuit to further determine if the voltage across the battery cell is too low.

[0081] Based on this, after the first adapter is connected to the sampling harnesses at both ends of the battery cell, the connection status of the sampling harness of the corresponding battery cell and whether the voltage at both ends of the battery cell is too low can be checked through the indicator lights on the device. Specifically, this may include the following situations: when the sampling harness of the battery cell is loose (intermittent connection), the corresponding indicator light will also flash intermittently; when the sampling harness of the battery cell is loosely connected or disconnected, the corresponding indicator light will also turn off; when the voltage at both ends of the battery cell is too low, the corresponding indicator light will be in a low brightness state, and the lower the voltage, the lower the brightness.

[0082] Furthermore, in a feasible example, the energy storage module charging and discharging device further includes a self-resetting fuse resistor, which is connected in series between the first adapter and the first cell balancing module. When a short circuit occurs in the circuit between the first adapter and the first cell balancing module, or when the current exceeds a preset current, the resistance value of the self-resetting fuse resistor increases to a first preset resistance value. When no short circuit occurs in the circuit between the first adapter and the first cell balancing module, and the current is not greater than a preset current, the resistance value of the self-resetting fuse resistor decreases to a second preset resistance value, which is less than the first preset resistance value.

[0083] The energy storage module's charging and discharging device also includes a self-resetting fuse resistor, which provides short-circuit and overcurrent protection during the charging and discharging process of the battery cells via the charging and discharging equalization device. When improper operation of the external interface or battery cell test point causes a short circuit or excessive charging / discharging current, the corresponding self-resetting fuse resistor will rapidly increase its resistance value, isolating the short-circuit source and protecting the battery cell. When the current returns to the permissible level, the self-resetting fuse resistor will automatically return to a low-resistance state (approaching 0Ω), improving safety during operation.

[0084] In this application, by introducing a self-resetting fuse circuit, short-circuit and overcurrent protection can be provided during the charging and discharging of the battery cell, thereby improving safety during operation.

[0085] The foregoing embodiments are illustrated below with reference to the accompanying drawings:

[0086] For example, please refer to Figure 7 , Figure 7 A circuit topology diagram of another first cell balancing module provided in the embodiments of this application is shown below. Figure 7 As shown, it includes self-resetting fuse resistors F1-F9, light-emitting elements LED1-LED8, protective resistors R1-R8, and multiple first cell equalization modules J1-J8. Each first cell equalization module includes a port for connecting to a first adapter terminal and a port for connecting to a charge / discharge equalization device. Figure 7 In each first cell balancing module, the positive port 1 and negative port 2 refer to the ports used to connect to the charge / discharge balancing device. Figure 7 In each first cell balancing module, the positive port 3 and negative port 4 refer to the ports used to connect to the first adapter.

[0087] The negative terminal of the light-emitting element LED1 is connected to the negative terminal of the first cell equalization module J1 (which can also be used as the sampling terminal BAT0 when the voltage test module is connected to the first adapter terminal), the positive terminal of the light-emitting element LED1 is connected to the first port of the protection resistor R1, and the second port of the protection resistor R1 is connected to the positive terminal of the first cell equalization module J1 (which can also be used as the sampling terminal BAT1 when the voltage test module is connected to the first adapter terminal).

[0088] The negative terminal of the light-emitting element LED2 is connected to the negative terminal of the first cell equalization module J2 and the positive terminal of the first cell equalization module J1 (which can also be used as the sampling terminal BAT1 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED2 is connected to the first port of the protection resistor R2. The second port of the protection resistor R2 is connected to the positive terminal of the first cell equalization module J2 and the negative terminal of the first cell equalization module J3 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal).

[0089] The negative terminal of the light-emitting element LED3 is connected to the negative terminal of the first cell equalization module J3 and the positive terminal of the first cell equalization module J2 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED3 is connected to the first port of the protection resistor R3. The second port of the protection resistor R3 is connected to the positive terminal of the first cell equalization module J3 and the negative terminal of the first cell equalization module J4 (which can also be used as the sampling terminal BAT3 when the voltage test module is connected to the first adapter terminal).

[0090] The negative terminal of the light-emitting element LED4 is connected to the negative terminal of the first cell equalization module J4 and the positive terminal of the first cell equalization module J3 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED4 is connected to the first port of the protection resistor R4. The second port of the protection resistor R4 is connected to the positive terminal of the first cell equalization module J4 and the negative terminal of the first cell equalization module J5 (which can also be used as the sampling terminal BAT4 when the voltage test module is connected to the first adapter terminal).

[0091] The negative terminal of the light-emitting element LED5 is connected to the negative terminal of the first cell equalization module J5 and the positive terminal of the first cell equalization module J4 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED5 is connected to the first port of the protection resistor R5. The second port of the protection resistor R5 is connected to the positive terminal of the first cell equalization module J5 and the negative terminal of the first cell equalization module J6 (which can also be used as the sampling terminal BAT5 when the voltage test module is connected to the first adapter terminal).

[0092] The negative terminal of the light-emitting element LED6 is connected to the negative terminal of the first cell equalization module J6 and the positive terminal of the first cell equalization module J5 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED6 is connected to the first port of the protection resistor R6. The second port of the protection resistor R6 is connected to the positive terminal of the first cell equalization module J6 and the negative terminal of the first cell equalization module J7 (which can also be used as the sampling terminal BAT6 when the voltage test module is connected to the first adapter terminal).

[0093] The negative terminal of the light-emitting element LED7 is connected to the negative terminal of the first cell equalization module J7 and the positive terminal of the first cell equalization module J6 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED7 is connected to the first port of the protection resistor R7. The second port of the protection resistor R7 is connected to the positive terminal of the first cell equalization module J7 and the negative terminal of the first cell equalization module J8 (which can also be used as the sampling terminal BAT7 when the voltage test module is connected to the first adapter terminal).

[0094] The negative terminal of the light-emitting element LED8 is connected to the negative terminal of the first cell equalization module J8 and the positive terminal of the first cell equalization module J7 (which can also be used as the sampling terminal BAT2 when the voltage test module is connected to the first adapter terminal). The positive terminal of the light-emitting element LED8 is connected to the first port of the protection resistor R8, and the second port of the protection resistor R8 is connected to the positive terminal of the first cell equalization module J8 (which can also be used as the sampling terminal BAT8 when the voltage test module is connected to the first adapter terminal).

[0095] Self-resetting fuse resistors F1-F9 provide short-circuit and overcurrent protection for the battery cells in the energy storage module. When a short circuit occurs due to improper operation of the first cell equalization module J1-J8 or the sampling terminals BAT1-BAT9, or when the charging / discharging current is too large, the corresponding self-resetting fuse resistor will rapidly increase its resistance value, thus isolating the short-circuit source and protecting the battery cell. When the current returns to an allowable value, the self-resetting fuse resistor will automatically return to a low-resistance state (approaching 0Ω).

[0096] Sampling harness BAT0A is connected to a resettable fusible resistor F1 via a first adapter terminal; sampling harness BAT1A is connected to a resettable fusible resistor F2 via a first adapter terminal; sampling harness BAT2A is connected to a resettable fusible resistor F3 via a first adapter terminal; sampling harness BAT3A is connected to a resettable fusible resistor F4 via a first adapter terminal; sampling harness BAT4A is connected to a resettable fusible resistor F5 via a first adapter terminal; sampling harness BAT5A is connected to a resettable fusible resistor F6 via a first adapter terminal; sampling harness BAT6A is connected to a resettable fusible resistor F7 via a first adapter terminal; sampling harness BAT7A is connected to a resettable fusible resistor F8 via a first adapter terminal; sampling harness BAT8A is connected to a resettable fusible resistor F9 via a first adapter terminal.

[0097] Following the previous example, please refer to... Figure 8 , Figure 8 This is a schematic diagram of the structure of a voltage testing module provided in an embodiment of this application, as shown below. Figure 8 As shown, it includes nine voltage testing modules BAT0B-8B. Specifically, voltage testing module BAT0B is connected to the negative terminal (sampling terminal BAT0) of the first cell equalization module J1; voltage testing module BAT1B is connected to the negative terminal of the first cell equalization module J2 and the positive terminal of the first cell equalization module J1 (sampling terminal BAT1); voltage testing module BAT2B is connected to the negative terminal of the first cell equalization module J3 and the positive terminal of the first cell equalization module J2 (sampling terminal BAT2); voltage testing module BAT3B is connected to the negative terminal of the first cell equalization module J4 and the positive terminal of the first cell equalization module J3 (sampling terminal BAT3); and voltage testing module BAT4B is connected to the first cell equalization module J5... The negative terminal is connected to the positive terminal of the first cell equalization module J4 (sampling terminal BAT4); the voltage test module BAT5B is connected to the negative terminal of the first cell equalization module J6 and the positive terminal of the first cell equalization module J5 (sampling terminal BAT5); the voltage test module BAT6B is connected to the negative terminal of the first cell equalization module J7 and the positive terminal of the first cell equalization module J6 (sampling terminal BAT6); the voltage test module BAT7B is connected to the negative terminal of the first cell equalization module J8 and the positive terminal of the first cell equalization module J7 (sampling terminal BAT7); the voltage test module BAT8B is connected to the positive terminal of the first cell equalization module J8 (sampling terminal BAT8).

[0098] Following the previous example, please refer to... Figure 9 , Figure 9 This is a schematic diagram of the structure of a temperature testing module provided in an embodiment of this application, as shown below. Figure 9As shown, it includes six temperature testing modules RT4A-6A and RT4B-6B. Temperature testing modules RT4A and RT4B correspond to each other and are connected to sampling terminals RT1A and RT1B respectively; temperature testing modules RT5A and RT5B correspond to each other and are connected to sampling terminals RT2A and RT2B respectively; temperature testing modules RT6A and RT6B correspond to each other and are connected to sampling terminals RT3A and RT3B respectively.

[0099] In addition, the energy storage module charging and discharging device also includes a second cell balancing module, wherein the second cell balancing module includes multiple connection terminals, which are connected to the multiple first adapter terminals. The second cell balancing module is also used to connect to a charging and discharging balancing device, so as to realize the connection between the charging and discharging balancing device and multiple cells in the energy storage module, wherein the charging and discharging balancing device is used to perform charging and discharging balancing operations on the multiple cells included in the energy storage module.

[0100] For example, please refer to Figure 10 , Figure 10 This is a schematic diagram of the structure of a second cell balancing module provided in an embodiment of this application. Figure 10 As shown, it includes adapter terminals 1-13, where adapter terminals 1-9 correspond to sampling harnesses BAT0A-8A respectively. It can be seen that when the charge / discharge equalization device is connected to the second cell equalization module, it can simultaneously perform charge / discharge equalization operations on multiple cells in the energy storage module.

[0101] In addition, in a specific example, the energy storage module charging and discharging device includes an upper cover, a lower cover, and a circuit board installed between the upper cover and the lower cover. The circuit board includes a first cell balancing module, a second cell balancing module, a sampling harness adapter module, a voltage testing module, a temperature testing module, multiple indicator light circuits, and multiple self-resetting fuse resistors. The upper cover and / or the lower cover have openings corresponding to the modules included in the circuit board, and the upper cover and / or the lower cover include a marking for the module corresponding to each opening.

[0102] The energy storage module charging and discharging device integrates all the aforementioned modules into a circuit board, which is protected by an upper cover and a lower cover. The upper cover and / or lower cover have openings corresponding to the modules included in the circuit board, and each opening is marked with a label indicating the module being charged.

[0103] For example, please refer to Figure 11 , Figure 11 This is a schematic diagram of the overall structure of an energy storage module charging and discharging device provided in an embodiment of this application, as shown below. Figure 11As shown, it includes a first opening 1101 corresponding to the first cell balancing module, a second opening 1102 corresponding to the sampling harness conversion module, a third opening 1103 corresponding to the temperature testing module, a fourth opening 1104 corresponding to the voltage testing module, and a fifth opening 1105 corresponding to the indicator light circuit.

[0104] For example, please refer to Figure 12 , Figure 12 A schematic diagram of the overall structure of another energy storage module charging and discharging device provided in this application embodiment is shown below. Figure 12 As shown, it includes a first opening 1101 corresponding to the first cell balancing module, a second opening 1102 corresponding to the two sampling harness conversion modules, a third opening 1103 corresponding to the temperature testing module, and a sixth opening 1106 corresponding to the second cell balancing module.

[0105] Following the previous example, please refer to... Figure 13 , Figure 13 This application provides an overall disassembly diagram of an energy storage module charging and discharging device, as shown in the embodiment. Figure 13 As shown, the system includes an upper cover 200, a circuit board 300, and a lower cover 400. The upper cover 200 and / or the lower cover 400 may include markings for the modules corresponding to each opening. For example, the upper cover 200 and the lower cover 400 may be marked with the cell voltage test point numbers of the energy storage module (BAT1-8 on the left side of the upper cover 200, and numbers 1-8 on the left side of the lower cover 400); the temperature probe measurement point numbers of the energy storage module (e.g., NTC1-3) (not shown in the figure) may be marked at the third starting point corresponding to the temperature module on the side of the upper cover 200; and the first cell balancing module number (numbers 1-8) (not shown in the figure) may be marked at the bottom of the lower cover 400.

[0106] Following the previous example, please refer to... Figure 14 , Figure 14 This application provides a schematic diagram of the structure of a circuit board, as shown in the embodiment of the present application. Figure 14As shown, section 301 on the circuit board corresponds to the first cell balancing module, used for charging and discharging balancing operations after the charging and discharging balancing device is connected to a designated cell in the energy storage module. This module includes eight interfaces, J1-J8, each with positive and negative terminals. Section 303 on the circuit board corresponds to the sampling harness adapter module, which connects to the sampling harness of the cell in the energy storage module. Section 304 on the circuit board corresponds to the temperature testing module; section 305 corresponds to the voltage testing module; and section 306 corresponds to the indicator light circuit. When the first adapter in section 303 is connected to the sampling harness of the cell in the energy storage module, all eight indicator lights illuminate; when the connection is disconnected, the eight indicator lights turn off. Section 308 in the circuit includes nine self-resetting fuse resistors, providing short-circuit and overcurrent protection for the cells in the energy storage module.

[0107] In addition, please see Figure 15 , Figure 15 An overall disassembly diagram of another energy storage module charging and discharging device provided in the embodiments of this application is shown below. Figure 15 As shown, the device includes an upper cover 200, a circuit board 300, and a lower cover 400. The upper cover 200 and / or the lower cover 400 may include markings for the modules corresponding to each opening.

[0108] Following the previous example, please refer to... Figure 16 , Figure 16 This is a schematic diagram of another circuit board structure provided in an embodiment of this application, such as... Figure 16 As shown in the diagram. Part 301 on the circuit board corresponds to the first cell balancing module. Part 303 on the circuit board corresponds to the sampling harness adapter module, which connects to the sampling harness of the cells in the energy storage module. It can be seen that the circuit board includes two sampling harness adapter modules, which can correspond to different adapter standards. Part 304 on the circuit board corresponds to the temperature testing module. Part 309 on the circuit board corresponds to the second cell balancing module.

[0109] As can be seen from this application, since the first cell equalization module included in the energy storage module charging and discharging device can be electrically connected to the sampling harness of a single cell among the multiple cells included in the energy storage module based on the first sub-transfer terminal and the second sub-transfer terminal among the multiple first transfer terminals, the charging and discharging equalization device can be connected to a single cell among the multiple cells in the energy storage module by connecting to the first cell equalization module, thereby realizing the charging and discharging equalization operation of a single cell among the multiple cells included in the energy storage module. Compared with unpacking the energy storage module and then performing charging and discharging equalization operation on a single cell, the stability and reliability of the charging and discharging equalization operation on a single cell are improved.

[0110] Meanwhile, the energy storage module charging and discharging device also includes a voltage testing module and a temperature testing module. The voltage testing module can measure the voltage across the two ends of the cell when the battery management system detects an abnormal voltage in the cell within the energy storage module, thereby initially locating the cell that needs to undergo charge-discharge equalization. The temperature testing module can measure the voltage of the temperature probe inside the energy storage module when the battery management system detects an abnormal temperature in the energy storage module, thereby determining the accuracy of the battery management system's temperature anomaly detection.

[0111] Furthermore, the energy storage module charging and discharging device also includes an indicator light module. By observing whether the light-emitting elements in the multiple indicator light circuits included in the indicator light module are lit, it can be determined whether the sampling harness of the battery cell and the sampling harness adapter module are properly connected. In addition, by observing the brightness of the light-emitting elements, it can also be determined whether the voltage at both ends of the battery cell is normal, thereby identifying the battery cell that needs to undergo charging and discharging equalization operation.

[0112] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

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

[0115] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0116] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An energy storage module charging and discharging device, characterized in that, The device includes a first cell equalization module, a sampling harness adapter module, and an indicator light module, wherein, The sampling harness adapter module includes multiple first adapter terminals, among which the first sub-adapter terminal and the second sub-adapter terminal are electrically connected to the first cell equalization module; The plurality of first adapter terminals are also used to electrically connect to the sampling harness of the plurality of cells included in the energy storage module, wherein the first sub-adapter terminal and the second sub-adapter terminal are respectively electrically connected to the positive and negative terminals of a single cell among the plurality of cells; The indicator module includes multiple indicator circuits, each corresponding to a multiple battery cell. The input and output terminals of each indicator circuit are electrically connected to the positive and negative terminals of the corresponding battery cell through multiple first adapter terminals.

2. The apparatus of claim 1, wherein, The device also includes a second cell balancing module, wherein... The second cell balancing module includes multiple connection terminals, which are connected to the multiple first adapter terminals.

3. The apparatus of claim 1, wherein, Each indicator light circuit includes a light-emitting element and a protective resistor connected in series, wherein, The light-emitting element in each indicator circuit is used to emit light based on the voltage across the battery cell when the sampling harness of the battery cell corresponding to each indicator circuit is normally electrically connected to the first adapter terminal. The protective resistor is used to limit the current in the indicator light circuit.

4. The apparatus of claim 3, wherein, The brightness of the light-emitting element in each indicator circuit is determined according to the voltage across the battery cell corresponding to each indicator circuit. Within a first preset voltage range, the brightness of the light-emitting element changes with the voltage across the battery cell.

5. The device of any one of claims 1-4, wherein, The energy storage module charging and discharging device also includes multiple voltage testing modules, which are electrically connected to the multiple first adapter terminals. The plurality of voltage testing modules are also used to connect to a first measuring device to realize electrical connection between the first measuring device and a plurality of first adapter terminals in the sampling harness adapter module. The first measuring device is used to perform voltage measurement on at least one of the plurality of battery cells.

6. The apparatus of claim 5, wherein, The plurality of first adapter terminals are used to connect the sampling harness of the battery cells included in the energy storage module when the voltage of the target battery cell in the energy storage module is not within the second preset voltage range. The plurality of voltage testing modules are used to connect the first measuring device after the energy storage module includes the battery cells connected to the plurality of first adapter terminals, so as to realize the electrical connection between the first measuring device and the target battery cell in the energy storage module.

7. The apparatus of claim 1, wherein, The energy storage module charging and discharging device further includes a temperature testing module, and the sampling harness adapter module further includes a second adapter terminal. The temperature testing module is electrically connected to the second adapter terminal; The second adapter is also used for electrical connection with the temperature probe in the energy storage module; The temperature testing module is used to realize the electrical connection between the second measuring device and the second adapter terminal, and the second measuring device is used to measure the resistance value of the temperature probe.

8. The apparatus of claim 7, wherein, The second adapter is used to connect a temperature probe in the energy storage module when the temperature in the energy storage module is not within a preset temperature range. The temperature testing module is used to connect the second measuring device after the temperature probe is connected to the second adapter terminal, so as to realize the electrical connection between the second measuring device and the temperature probe.

9. The apparatus of claim 1, wherein, The energy storage module charging and discharging device further includes a self-resetting fuse resistor, which is connected in series between the first adapter and the first cell balancing module. When a short circuit occurs in the circuit between the first adapter and the first cell balancing module, or when the current exceeds a preset current, the resistance value of the self-resetting fuse resistor increases to the first preset resistance value. When there is no short circuit in the circuit between the first adapter and the first cell balancing module and the current is not greater than the preset current, the resistance value of the self-resetting fuse resistor is reduced to the second preset resistance value, which is less than the first preset resistance value.

10. The apparatus of claim 1, wherein, The energy storage module charging and discharging device includes an upper cover, a lower cover, and a circuit board installed between the upper cover and the lower cover. The circuit board includes a first cell equalization module, a second cell equalization module, a sampling harness adapter module, a voltage testing module, a temperature testing module, an indicator light module, and multiple self-resetting fuse resistors; The upper cover and / or lower cover have openings corresponding to the modules included in the circuit board, and the upper cover and / or lower cover include a mark for the module corresponding to each opening.

11. The apparatus of claim 1, wherein, The first cell balancing module is also used to connect to a charge-discharge balancing device to enable the charge-discharge balancing device to connect to a single cell in the energy storage module. The charge-discharge balancing device is used to perform charge-discharge balancing operations on a single cell among the multiple cells included in the energy storage module.

12. The apparatus of claim 2, wherein, The second cell balancing module is also used to connect to a charge-discharge balancing device to enable the charge-discharge balancing device to connect to multiple cells in the energy storage module. The charge-discharge balancing device is used to perform charge-discharge balancing operations on the multiple cells included in the energy storage module.

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