Energy storage cabinet and battery module thereof

Abstract

To provide a battery module.SOLUTION: A battery module includes a housing having a side opening, a plurality of cells provided within the housing, each cell having two electrode terminals, and a liquid filling device connected to the housing and configured to inject a cooling liquid into the housing, and the lower edge of the side opening is vertically lower than the electrode terminals, and the side opening of the housing is configured to drain excess cooling liquid out of the housing.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an energy storage cabinet and its battery module. [Background technology]

[0002] The most commonly used battery type in conventional power storage devices is the lithium battery, which has a certain risk of catching fire and burning if the temperature is too high. However, conventional power storage devices lack a mechanism to deal with the ignition and burning of lithium batteries. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of this, an object of the present disclosure is to provide an energy storage cabinet and its battery module with fire protection function. [Means for solving the problem]

[0004] According to some embodiments of the present disclosure, there is provided a battery module including a housing having a first side opening, a plurality of cells provided within the housing and each having two electrode terminals, and a liquid filling device connected to the housing and configured to inject a cooling liquid into the housing, wherein the electrode terminals are provided on a top cover at an upper edge of the cell body, a lower edge of the first side opening of the housing is vertically lower than the electrode terminals, and the first side opening of the housing is configured to drain excess cooling liquid outside the housing.

[0005] In one or more embodiments of the present disclosure, when the cooling liquid is injected into the housing, the maximum level of the cooling liquid is lower than the two electrode terminals of the cell.

[0006] In one or more embodiments of the present disclosure, the battery module further includes a circuit board provided on the cell, and a lower edge of the first side opening of the housing is vertically lower than the circuit board.

[0007] In one or more embodiments of the present disclosure, the battery module further includes a busbar element electrically connected to two electrode terminals of the two cells, and a lower edge of the first side opening of the housing is vertically lower than the busbar element.

[0008] In one or more embodiments of the present disclosure, the liquid filling device includes a liquid pipe connected to the liquid storage tank, and a valve provided in the liquid pipe and configured to transport or block cooling liquid through the liquid pipe to the housing depending on the temperature of the battery module.

[0009] In one or more embodiments of the present disclosure, the housing of the battery module includes a flat tube provided surrounding the first side opening and protruding from an outer wall surface of the housing.

[0010] According to some embodiments of the present disclosure, an energy storage cabinet includes a bracket, a battery module mounted on the bracket, and a liquid storage tank mounted on the bracket and positioned above the battery module and configured to store a cooling liquid, wherein the liquid filling device for the battery module is connected between a housing of the battery module and the liquid storage tank and configured to guide the cooling liquid in the liquid storage tank to flow into the housing of the battery module.

[0011] In one or more embodiments of the present disclosure, the bracket is provided on one side of the battery module and configured to support the battery module, and includes a support post having an internal flow passage, and a first side opening of the housing of the battery module is connected to the internal flow passage of the support post.

[0012] In one or more embodiments of the present disclosure, the housing of the battery module includes a first flat tube surrounding the first side opening and protruding from an outer wall surface of the housing, the support pillar further has a second side opening connected to the internal flow path and includes a second flat tube surrounding the second side opening and protruding from the outer wall surface of the support pillar, the first flat tube is coupled to the second flat tube, and the first flat tube and the second flat tube respectively have first and second hypotenuse structures that have complementary outer shapes and abut against each other.

[0013] In one or more embodiments of the present disclosure, the energy storage cabinet further includes a controller configured to receive temperature information from a temperature sensor or a battery management system, the temperature information indicating a temperature of the battery module, and the controller is further configured to determine whether the battery module is overheating in response to the temperature information, and if the battery module is overheating, the controller is configured to instruct the liquid filling device to inject cooling liquid into the housing of the battery module.

[0014] In one or more embodiments of the present disclosure, the control device is configured to determine, in response to the temperature information, whether the temperature of the battery module exceeds a first threshold or the temperature change rate of the battery module exceeds a second threshold, and if the temperature of the battery module exceeds the first threshold or the temperature change rate of the battery module exceeds the second threshold, the control device is configured to instruct the liquid filling device to inject cooling liquid into the housing of the battery module.

[0015] In one or more embodiments of the present disclosure, the liquid storage tank shields the top surface of the battery module. Effect of the Invention

[0016] As described above, the energy storage cabinet of the present disclosure includes a liquid storage tank configured to store a cooling liquid. The battery module of the energy storage cabinet is combined with a liquid filling device, which is connected to the liquid storage tank and configured to inject cooling liquid into a housing of the battery module in case of temperature runaway or ignition / combustion of a cell of the battery module. The housing has a side opening through which excess cooling liquid can be discharged outside the housing. The vertical position of the lower edge of the side opening of the housing is lower than the vertical position of the electrode terminal of the cell to prevent the cooling liquid from contacting the electrode terminal of the cell and causing a short circuit. [Brief description of the drawings]

[0017] To make the above and other objects, features, advantages and embodiments of the present disclosure more clearly and comprehensibly, the accompanying drawings are described as follows: [Figure 1] FIG. 1 illustrates a perspective view of an energy storage cabinet according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a perspective view of one battery module of the energy storage cabinet shown in FIG. 1. [Diagram 3] FIG. 2 is a partial cross-sectional view of one battery module of the energy storage cabinet shown in FIG. [Figure 4] FIG. 2 is a partial enlarged view of the energy storage cabinet shown in FIG. 1. [Diagram 5] FIG. 2 is a partial enlarged view of a slot in the energy storage cabinet shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] In order to make the description of the present disclosure more detailed and complete, reference can be made to the accompanying drawings and various embodiments described below. Each element in the drawings is not drawn to scale and is provided only to describe the present disclosure. In the following, many practical details are described to provide a complete understanding of the present disclosure, but these details are not used to limit the present disclosure, because those skilled in the art should understand that the present disclosure can be implemented without one or more practical details.

[0019] Please refer to FIG. 1. FIG. 1 is a perspective view of an energy storage cabinet 20 according to an embodiment of the present disclosure. The energy storage cabinet 20 includes a bracket 22 and a plurality of battery modules 21 mounted on the bracket 22. The bracket 22 is used to mount the battery modules 21. The bracket 22 has a plurality of slots, each of which is used to accommodate one battery module 21. The battery modules 21 are removably mounted in the slots of the bracket 22. In other words, the battery modules 21 can be inserted into the slots and can be pulled out of the slots according to needs (e.g., when repair or maintenance is required). The battery modules 21 are connected to a slide rail structure of the bracket 22 so that they can slide into or out of the slots. In some embodiments, the bracket 22 includes a plurality of support posts 50 extending in a substantially vertical direction, and the support posts 50 are mounted between the battery modules 21 to separate adjacent battery modules 21.

[0020] As shown in FIG. 1, the battery modules 21 may be stacked vertically. The battery modules 21 may be divided into a number of floor assemblies 23, and the battery modules 21 located on the same horizontal layer belong to the same floor assembly 23. In the illustrated embodiment, the energy storage cabinet 20 includes nine floor assemblies 23, and one floor assembly 23 is shown in the figure with a dashed frame. The battery modules 21 in each floor assembly 23 are connected in series to add up the voltages of the battery modules 21 in the floor assembly 23 to output a larger voltage. Each floor assembly 23 may include one common anode and one common negative electrode.

[0021] 1, the energy storage cabinet 20 further includes a junction device 26, which is mounted on the bracket 22 and located on one side of the energy storage cabinet 20, and is connected to the common positive electrode and the common negative electrode (not shown) of each layer assembly 23. The junction device 26 includes a DC junction unit, an AC auxiliary unit, and one or more control units (or one or more switch units).

[0022] 1, the energy storage cabinet 20 further includes a controller 90 (schematically only and not shown in any specific structure), which is configured to control the operation of the energy storage cabinet 20. In some embodiments, the connection device 26 and the controller 90 are both housed in a box.

[0023] 1 , the energy storage cabinet 20 further includes a cooling device 28, which is mounted on the bracket 22 and located on the other side of the energy storage cabinet 20. The cooling device 28 is used to output cool air to help reduce the temperature of the battery module 21. The cooling device 28 is, for example, an air conditioning system. In some embodiments, the connection device 26 and the cooling device 28 are mounted on opposite sides of the battery module 21.

[0024] As shown in FIG. 1 , the energy storage cabinet 20 further includes a liquid storage tank 25, which is mounted on the bracket 22 and located above the battery module 21. The liquid storage tank 25 is configured to store a cooling liquid 27. The cooling liquid 27 is, for example, pure water. The cooling liquid 27 stored in the liquid storage tank 25 may be used to realize a fire-fighting mechanism of the energy storage cabinet 20. When it is detected that the temperature of the battery module 21 is too high or the temperature rises too quickly, the cooling liquid 27 can be injected into the battery module 21 to respond to the case where a cell of the battery module 21 fails, causing temperature runaway or ignition and combustion. Through calculation, the amount of cooling liquid 27 stored in the liquid storage tank 25 is sufficient to fill at least one battery module 21 and allow the cooling liquid 27 in the battery module 21 to reach the highest liquid level.

[0025] 1, the liquid storage tank 25 is provided on the top of the bracket 22. In some embodiments, the liquid storage tank 25 shields a part or all of the top surface of the battery module 21. With the above arrangement, when the energy storage cabinet 20 is placed in an outdoor environment, the liquid storage tank 25 and the cooling liquid 27 in the liquid storage tank 25 can block sunlight and reduce the effect of the temperature rise of the battery module 21 caused by sunlight.

[0026] Please refer to FIG. 2. FIG. 2 is a perspective view of one battery module 21 of the energy storage cabinet 20 shown in FIG. 1. In FIG. 2, the top cover of the battery module 21 is removed to explain the elements. The battery module 21 includes a housing 29 and a plurality of cells 12 provided in the housing 29. The cells 12 are, for example, lithium batteries. The cells 12 may be prismatic cells or pouch type cells. The cells 12 are arranged in at least one row along the direction D, and in the embodiment shown, the battery module 21 includes 48 cells 12 arranged in four rows with 12 cells per row. The battery module 21 further includes a top cover (not shown), which seals the top opening of the housing 29.

[0027] As shown in Fig. 2, each cell 12 includes two electrode terminals 15 arranged in parallel, including one positive terminal 13 and one negative terminal 14. The battery module 21 further includes a plurality of busbar elements 30, which are arranged in a housing 29 and configured to be connected in series to the cells 12, specifically, the busbar elements 30 are electrically connected to the positive terminals 13 and the negative terminals 14 of two adjacent cells 12 located in the same row. In some embodiments, the battery module 21 further includes at least one series element 40, which is arranged in the housing 29 and electrically connected to the electrode terminals 15 of the cells 12 in two adjacent rows.

[0028] In the embodiment shown, the electrode terminals 15 of the cells 12 are provided on a top cover at the upper edge of the cell body of the cells 12, and the busbar element 30 and the series element 40 are provided above the cells 12 and contacted to the electrode terminals 15 of the cells 12. The busbar element 30 and the series element 40 may be made of a conductive material, for example, copper or a copper alloy. The busbar element 30 and the series element 40 may be fixed to the electrode terminals 15 of the cells 12 by, for example, laser welding or screwing. In some embodiments, the length of the series element 40 is less than the length of the busbar element 30.

[0029] As shown in FIG. 2 , the battery module 21 further includes a plurality of circuit boards 37, and the circuit boards 37 are provided on the cells 12. For example, the circuit boards 37 may be provided on the top surface of the cells 12 (i.e., the surface on which the electrode terminals 15 of the cells 12 are provided). Each circuit board 37 may be paired with one cell 12. The circuit boards 37 include, for example, a chip of a battery management system (BMS). The battery management system can perform various management operations for the corresponding cells 12, and the management operations may include at least one of measuring the voltage and current of the cells 12, monitoring the temperature of the cells 12, parameters such as a state-of-charge (SOC) and a state-of-health (SOH), diagnosing and / or reporting abnormalities of the cells 12, and controlling the charging and discharging of the cells 12. In some embodiments, the circuit boards 37 are communicatively connected to the control device 90. The circuit board 37 may exchange information with the controller 90 , for example, the circuit board 37 may report the status of the cells 12 to the controller 90 .

[0030] 2, the battery module 21 further includes at least one temperature sensor 38 (illustration only, specific structure not shown), where the temperature sensor 38 is provided within the housing 29 and configured to provide a sensing signal, where the sensing signal indicates a temperature at a particular location of the battery module 21. The temperature sensor 38 may be provided at any suitable location within the housing 29. For example, the temperature sensor 38 may be provided at a location such as beside the cells 12, between the cells 12, on the outer surface of the cells 12, etc.

[0031] In some embodiments, at least one temperature sensor 38 is disposed in each cell 12. The battery module 21 may also include multiple temperature sensors 38 provided at different positions, each measuring the temperature at a different position in the battery module 21.

[0032] The temperature sensor 38 is communicatively coupled to the circuit board 37 and configured to provide a sensing signal to the circuit board 37. In some embodiments, the temperature sensor 38 is communicatively coupled to the controller 90 and configured to provide a sensing signal to the controller 90.

[0033] 2, the housing 29 of the battery module 21 has at least one side opening 24, and the side opening 24 is provided on at least one side wall of the housing 29. The side opening 24 is configured to drain excess cooling liquid injected into the internal space of the housing 29 to the outside of the housing 29. The portion of the housing 29 below the side opening 24 is designed to be airtight, in other words, the portion of the housing 29 below the side opening 24 does not have any holes through which liquid can flow out. Therefore, excess cooling liquid is discharged only from the side opening 24.

[0034] 2, the housing 29 may have two side openings 24, which are provided on opposite sides of the housing 29. In this manner, the two side openings 24 can serve as an outlet for excess cooling liquid, as well as an airflow channel through which air (e.g., cold air generated by the cooling device 28 shown in FIG. 1) can pass to help dissipate heat from the cells 12.

[0035] 2 , the housing 29 of the battery module 21 includes at least a first flat tube 41, which is disposed around the side opening 24 of the housing 29 and protrudes from the outer wall surface of the housing 29. The first flat tube 41 may be used to be coupled to the support 50 of the bracket 22. In some embodiments, the first flat tube 41 has a first oblique side structure 42. The first flat tube 41 is further used to be connected to a drainage or airflow channel outside the housing 29.

[0036] Please refer to Fig. 3. Fig. 3 is a partial cross-sectional view of one battery module 21 of the energy storage cabinet 20 shown in Fig. 1. The battery module 21 further includes a liquid filling device 60, which is connected to the housing 29 and forms an inlet 66 at the connection point with the housing 29. The liquid filling device 60 is configured to obtain the cooling liquid 27 from the aforementioned liquid storage tank 25 and inject the cooling liquid 27 into the housing.

[0037] 3, a lower edge 49 of the side opening 24 of the housing 29 is vertically lower than the electrode terminal 15 of the cell 12. A cooling liquid is injected into the housing 29 through an inlet 66, and a maximum liquid level 48 of the cooling liquid is lower than the electrode terminal 15 of the cell 12. In this way, when the cooling liquid is injected into the housing 29, the cooling liquid does not come into contact with the electrode terminal 15 of the cell 12, thereby avoiding a short circuit. Optionally, the inlet 66 is vertically lower than the lower edge 49 of the side opening 24.

[0038] 3, a lower edge 49 of the side opening 24 of the housing 29 is vertically lower than the busbar element 30. When cooling liquid is poured into the housing 29, a maximum liquid level 48 of the cooling liquid is lower than the busbar element 30. A lower edge 49 of the side opening 24 of the housing 29 is vertically lower than the circuit board 37. When cooling liquid is poured into the housing 29, a maximum liquid level 48 of the cooling liquid is lower than the circuit board 37. With the above arrangement, a short circuit or damage to the circuit board 37 can be avoided.

[0039] 3, the liquid filling device 60 includes a liquid pipe 64. One end of the liquid pipe 64 is connected to the housing 29 of the battery module 21 through an inlet 66. The other end of the liquid pipe 64 can be connected to the liquid storage tank 25 to obtain cooling liquid from the liquid storage tank 25.

[0040] 3 , the liquid filling device 60 further includes a valve 65, which is provided in the liquid pipe 64. The valve 65 can be switched between an open state and a closed state, and when the valve 65 is in an open state, the valve 65 transports the cooling liquid through the liquid pipe 64 to the housing 29, and when the valve 65 is in a closed state, the valve 65 blocks the liquid pipe 64, so that the liquid pipe 64 cannot transport the cooling liquid to the housing 29.

[0041] The valve 65 can further control the flow rate of the cooling liquid, and may be, for example, a solenoid valve. The opening and closing of the valve 65 or the degree of opening of the valve 65 is controlled by the above-mentioned control device 90. The valve 65 is configured to transport or cut off the cooling liquid through the liquid pipe to the housing 29 according to information obtained by measuring the temperature of the battery module 21.

[0042] In some embodiments, the controller 90 of the energy storage cabinet is configured to receive temperature information from a temperature sensor 38 or a battery management system located, for example, on the circuit board 37, where the temperature information is indicative of a temperature at one or more locations of the battery modules 21. The controller is further configured to determine whether the battery modules 21 are overheating in response to the temperature information, and if the battery modules 21 are overheating, the controller is configured to instruct the liquid filling device 60 to inject cooling liquid into the housing 29 of the battery modules 21. The controller 90 is communicatively connected to a valve 65, and if the battery modules 21 are overheating, the controller is configured to send a control signal to the valve 65 to open the valve 65.

[0043] The control device 90 of the energy storage cabinet 20 is configured to determine, according to the temperature information, whether the temperature of the battery module 21 exceeds a first threshold or the temperature change rate of the battery module 21 exceeds a second threshold, and if the temperature of the battery module 21 exceeds the first threshold or the temperature change rate of the battery module 21 exceeds the second threshold, the control device is configured to instruct the liquid filling device 60 to inject cooling liquid into the housing 29 of the battery module 21.

[0044] Please refer to FIG. 4. FIG. 4 is a partial enlarged view of the energy storage cabinet 20 shown in FIG. 1. In some embodiments, the support 50 has an internal flow passage 53 (shown in dashed lines), and the side opening 24 (shown in dashed lines) of the housing 29 of the battery module 21 is connected to the internal flow passage 53 of the support 50. In this way, excess cooling liquid can flow into the internal flow passage 53 of the support 50 and flow to the bottom of the energy storage cabinet through the internal flow passage 53 before being discharged. In some embodiments, the support 50 further has at least one side opening 54 (shown in dashed lines) that is connected to the internal flow passage 53, and the battery module 21 is abutted against the side opening 54 of the support 50 through the first flat tube 41.

[0045] Please refer to Fig. 5. Fig. 5 is a partial enlarged view of the slot 56 of the energy storage cabinet 20 shown in Fig. 1. Two adjacent support posts 50 of the bracket 22 define a plurality of slots 56, and the battery modules 21 are removably provided in the slots 56. This figure shows a state in which some of the battery modules 21 are pulled out from the slots. The support posts 50 may include slide rails 57, which are provided on the sides of the support posts 50 and are configured to be slidably connected to the housings 29 of the battery modules 21.

[0046] As shown in FIG. 5, the support 50 includes a second flat tube 51, which is arranged around the side opening 54 of the support 50 and protrudes from the outer wall surface of the support 50. The first flat tube 41 of the battery module 21 is coupled to the second flat tube 51 of the support 50 so that the side opening 24 of the housing 29 of the battery module 21 is connected to the side opening 54 of the support 50. In some embodiments, the second flat tube 51 has a second oblique side structure 52, and the first oblique side structure 42 and the second oblique side structure 52 of the first flat tube 41 have complementary outer shapes and are abutted against each other to eliminate gaps. The installation of the first oblique side structure 42 and the second oblique side structure 52 allows the battery module 21 to be smoothly inserted or removed from the slot 56.

[0047] As described above, the energy storage cabinet of the present disclosure includes a liquid storage tank configured to store a cooling liquid. The battery module of the energy storage cabinet is combined with a liquid filling device, which is connected to the liquid storage tank and configured to inject cooling liquid into a housing of the battery module in case of temperature runaway or ignition / combustion of a cell of the battery module. The housing has a side opening through which excess cooling liquid can be discharged outside the housing. The vertical position of the lower edge of the side opening of the housing is lower than the vertical position of the electrode terminal of the cell to prevent the cooling liquid from contacting the electrode terminal of the cell and causing a short circuit.

[0048] Although the present disclosure has been disclosed in the above-mentioned embodiments, the above-mentioned embodiments are not used to limit the present disclosure, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, so the scope of protection of the present disclosure should be based on what is defined in the claims attached below. [Explanation of symbols]

[0049] 12: Cell 13: Positive terminal 14: Negative terminal 15: Electrode terminal 20: Energy storage cabinet 21: Battery module 22: Bracket 23: Layer Assembly 24: Side opening 25: Liquid storage tank 26: Connection device 27: Cooling liquid 28: Cooling device 29: Housing 30: Busbar element 37: Circuit board 38: Temperature sensor 40: Series element 41: 1st flat tube 42: First hypotenuse structure 48: Highest liquid level 49: Lower edge 50: Strut 51:Second flat tube 52: Second hypotenuse structure 53: Internal flow path 54: Side opening 56: Slot 57: Slide rail 60:Liquid filling device 64:Liquid tube 65: Valve 66: Inlet 90: Control device D: Direction

Claims

1. a housing having a first side opening; a plurality of cells disposed within the housing, each of the cells having a cell body and two electrode terminals; a liquid filling device connected to the housing and configured to inject a cooling liquid into the housing; Including, the two electrode terminals are provided on a top cover at an upper edge of the cell body, and a lower edge of the first side opening of the housing is lower than the two electrode terminals in a vertical direction; The first side opening of the housing is configured to drain excess of the cooling liquid outside the housing.

2. 2. The battery module according to claim 1, wherein when the cooling liquid is injected into the housing, a maximum liquid level of the cooling liquid is lower than the two electrode terminals.

3. The battery module according to claim 1 , further comprising a circuit board provided on the plurality of cells, the lower edge of the first side opening of the housing being vertically lower than the circuit board.

4. 2. The battery module according to claim 1, further comprising a bus bar element electrically connected to the two electrode terminals of two of the plurality of cells, and the lower edge of the first side opening of the housing is vertically lower than the bus bar element.

5. The liquid filling device includes: a liquid pipe connected to a liquid storage tank; a valve provided in the liquid pipe and configured to allow or block the passage of the cooling liquid through the liquid pipe to the housing depending on a temperature of the battery module; The battery module of claim 1 .

6. The battery module according to claim 1 , wherein the housing includes a flat tube surrounding the first side opening and protruding from an outer wall surface of the housing.

7. A bracket and The battery module according to claim 1 , which is provided on the bracket; a liquid storage tank provided on the bracket and positioned above the battery module and configured to store the cooling liquid; Including, An energy storage cabinet, wherein the liquid filling device of the battery module is connected between the housing of the battery module and the liquid storage tank and configured to guide the cooling liquid in the liquid storage tank to flow into the housing of the battery module.

8. the bracket is provided on one side of the battery module and configured to support the battery module, the bracket including a support having an internal flow passage; The energy storage cabinet of claim 7 , wherein the first side opening of the housing of the battery module is in communication with the internal flow passage of the support column.

9. the housing of the battery module includes a first flat tube provided to surround the first side opening and protruding from an outer wall surface of the housing, The support further has a second side opening communicating with the internal flow path, and includes a second flat tube surrounding the second side opening and protruding from an outer wall surface of the support, The first flat tube is coupled to the second flat tube, The energy storage cabinet according to claim 8 , wherein the first flat tube and the second flat tube have a first oblique side structure and a second oblique side structure, respectively, that are complementary in outer shape and abut against each other.

10. a controller configured to receive temperature information from the temperature sensor or the battery management system; the temperature information indicates a temperature of the battery module, 8. The energy storage cabinet of claim 7, wherein the control device is further configured to determine, in response to the temperature information, whether the battery module is overheating, and to instruct the liquid filling device to inject the cooling liquid into the housing of the battery module if the battery module is overheating.

11. 11. The energy storage cabinet of claim 10, wherein the control device is configured to determine, in response to the temperature information, whether the temperature of the battery module exceeds a first threshold or a temperature change rate of the battery module exceeds a second threshold, and to instruct the liquid filling device to inject the cooling liquid into the housing of the battery module when the temperature of the battery module exceeds the first threshold or the temperature change rate of the battery module exceeds the second threshold.

12. 8. The energy storage cabinet of claim 7, wherein the liquid storage tank shields a top surface of the battery module.

13. 8. The energy storage cabinet according to claim 7, wherein the cooling liquid has a maximum liquid level lower than the two electrode terminals when injected into the housing of the battery module.

14. 8. The energy storage cabinet of claim 7, wherein the battery module further includes a circuit board provided to the plurality of cells, and the lower edge of the first side opening of the housing is vertically lower than the circuit board.

15. 8. The energy storage cabinet of claim 7, wherein the battery module further includes a busbar element electrically connected to the two electrode terminals of two of the plurality of cells, and the lower edge of the first side opening of the housing is vertically lower than the busbar element.

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