Liquid cooling plate structure and battery module

Abstract

The utility model discloses a liquid cooling plate structure and a battery module, the liquid cooling plate structure comprises a plate body, a heat dissipation assembly and a fire protection assembly, the heat dissipation assembly is used for dissipating heat of a battery cell, the heat dissipation assembly comprises a first inlet, a first outlet and a heat dissipation pipeline, and the first inlet and the first outlet are communicated with the heat dissipation pipeline; the first inlet and the first outlet are formed in the first surface of the plate body, the heat dissipation pipeline is arranged in the plate body, the fire-fighting assembly is used for inhibiting thermal runaway of the battery cell, the fire-fighting assembly comprises a second inlet, a second outlet and a fire-fighting pipeline, the second inlet and the second outlet are communicated with the fire-fighting pipeline, and the second inlet and the second outlet are formed in the second surface of the plate body; and the fire-fighting pipeline is arranged in the plate body. According to the technical scheme, the heat dissipation performance of the battery module is improved, and the problem of thermal runaway of the high-density battery cell is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a liquid cooling plate structure and a battery module. BACKGROUND

[0002] With the development of electric vehicles and energy storage systems, the energy density of batteries is continuously improved, resulting in a large amount of heat generated by the battery cells during charging and discharging. If the heat is not effectively dissipated, it may lead to thermal runaway of the battery cells, thereby causing safety hazards. SUMMARY

[0003] The present application provides a liquid cooling plate structure and a battery module, which can improve the heat dissipation performance of the battery module and solve the problem of thermal runaway of high-density battery cells.

[0004] In a first aspect, the present application provides a liquid cooling plate structure, which comprises a plate body, a heat dissipation assembly and a fire-fighting assembly. The heat dissipation assembly is used for dissipating heat from the battery cells. The heat dissipation assembly comprises a first inlet, a first outlet and a heat dissipation pipeline. The first inlet and the first outlet are in communication with the heat dissipation pipeline. The first inlet and the first outlet are arranged on a first surface of the plate body. The heat dissipation pipeline is arranged inside the plate body. The fire-fighting assembly is used for inhibiting thermal runaway of the battery cells. The fire-fighting assembly comprises a second inlet, a second outlet and a fire-fighting pipeline. The second inlet and the second outlet are in communication with the fire-fighting pipeline. The second inlet and the second outlet are arranged on a second surface of the plate body. The fire-fighting pipeline is arranged inside the plate body.

[0005] The present application provides a liquid cooling plate structure and a battery module, which can improve the heat dissipation performance of the battery module and solve the problem of thermal runaway of high-density battery cells.

[0006] According to the foregoing embodiment of the first aspect of the present application, the fire-fighting assembly further comprises a plurality of spray holes. The plurality of spray holes are arranged on the second surface in sequence. The plurality of spray holes are in communication with the fire-fighting pipeline respectively. The second surface is located on a side of the plate body close to the battery cells. In the above embodiment, by arranging a plurality of spray holes on the second surface, the second surface is located on a side of the plate body close to the battery cells. The fire-fighting inhibitor can be sprayed out of the spray holes, which is conducive to inhibiting thermal runaway of the battery cells, thereby improving the safety and reliability of the battery cells.

[0007] According to the foregoing embodiment of the first aspect of the present application, each of the spray holes has an included angle with the second surface, so that the fire suppression agent forms an inclined angle with the plate body when sprayed from the spray holes to the external environment. In the foregoing embodiment, by arranging the included angle between each of the spray holes and the second surface, an inclined angle can be formed between the fire suppression agent and the second surface of the plate body when the fire suppression agent is sprayed from the spray holes, which is beneficial to avoid the contact surface of the battery cell and improve the safety and reliability of the battery cell.

[0008] According to the foregoing embodiment of the first aspect of the present application, the adjacent two battery cells have mounting gaps, and the plurality of spray holes are arranged in one-to-one correspondence with the plurality of mounting gaps. In the foregoing embodiment, by arranging the plurality of spray holes in one-to-one correspondence with the plurality of mounting gaps of the battery cell, the fire suppression agent can be sprayed into the mounting gap of the battery cell, which is beneficial to realize accurate spraying at a fixed point and avoid the contact surface of the battery cell, thereby improving the safety and reliability of the battery cell.

[0009] According to the foregoing embodiment of the first aspect of the present application, the heat dissipation pipeline includes a plurality of heat dissipation pipes in communication with each other, and the first inlet and the first outlet are arranged in communication with the plurality of heat dissipation pipes. The fire control pipeline includes a plurality of fire control pipes in communication with each other, and the second inlet and the second outlet are arranged in communication with the plurality of fire control pipes. In the foregoing embodiment, the heat dissipation pipeline includes a plurality of heat dissipation pipes in communication with each other, and the fire control pipeline includes a plurality of fire control pipes in communication with each other, which can increase the heat dissipation area, thereby effectively dissipating heat from the battery cell, and the plurality of fire control pipes can increase the capacity of the fire suppression agent, which is beneficial to further suppress the thermal runaway of the battery cell, thereby improving the safety and reliability of the battery cell.

[0010] According to the foregoing embodiment of the first aspect of the present application, a plurality of channels are arranged in the plate body in sequence, and the plurality of heat dissipation pipes and the plurality of fire control pipes are respectively located in different channels, and the plurality of heat dissipation pipes and the plurality of fire control pipes are arranged in sequence and alternately. In the foregoing embodiment, the plurality of heat dissipation pipes and the plurality of fire control pipes are respectively located in different channels, and the plurality of heat dissipation pipes and the plurality of fire control pipes are arranged in sequence and alternately, which avoids the influence of the heat dissipation pipeline and the fire control pipeline on each other.

[0011] According to any one of the foregoing embodiments of the first aspect of the present application, the cooling liquid is introduced into the heat dissipation pipeline through the first inlet to dissipate heat from the battery cell, and the fire suppression agent is introduced into the fire control pipeline through the second inlet to suppress the thermal runaway of the battery cell.

[0012] In a second aspect, the embodiments of the present application provide a battery module, which comprises a plurality of battery cells and a liquid cooling plate structure according to any one of the foregoing embodiments of the first aspect of the present application. The battery module comprises at least one liquid cooling plate structure, and the liquid cooling plate structure is arranged at the outer periphery of the battery cell.

[0013] The technical scheme of the present application sets at least one liquid cooling plate structure on the periphery of the battery cell, sets a heat dissipation assembly and a fire-fighting assembly in the liquid cooling plate structure, the heat dissipation assembly can dissipate heat from the battery cell, the heat dissipation assembly comprises a heat dissipation pipeline and a first inlet and a first outlet communicated with the heat dissipation pipeline, the first inlet and the first outlet are arranged on the first surface of the plate body, the fire-fighting assembly can inhibit thermal runaway of the battery cell, the fire-fighting assembly comprises a fire-fighting pipeline and a second inlet and a second outlet communicated with the fire-fighting pipeline, the second inlet and the second outlet are arranged on the second surface of the plate body, the first inlet and the first outlet, the second inlet and the second outlet are arranged on different surfaces of the plate body, and the heat dissipation pipeline and the fire-fighting pipeline are arranged alternately in the plate body, which can effectively dissipate heat from the battery cell and facilitate fire-fighting to inhibit thermal runaway of the battery cell, thereby improving the safety and reliability of the battery module.

[0014] According to the foregoing embodiment of the second aspect of the present application, the battery module further comprises a control assembly and a temperature detection assembly, the temperature detection assembly can detect the temperature of the battery cell and send a temperature signal to the control assembly, and the control assembly can control the opening or closing of the heat dissipation assembly and the starting of the fire-fighting assembly according to the temperature signal. In the above-mentioned embodiment, by setting the control assembly and the temperature detection assembly in the battery module, the temperature detection assembly can detect the temperature of the battery cell and send a temperature signal to the control assembly, and the control assembly can control the opening or closing of the heat dissipation assembly and the starting of the fire-fighting assembly according to the temperature signal, thereby controlling the battery module to switch between the heat dissipation mode and the fire-fighting mode, effectively dissipating heat from the battery cell and facilitating fire-fighting to inhibit thermal runaway of the battery cell, thereby improving the safety and reliability of the battery module.

[0015] According to the foregoing embodiment of the second aspect of the present application, the plurality of battery cells are arranged in immersion isolation. In the above-mentioned embodiment, by arranging the plurality of battery cells in immersion isolation, it is beneficial to further control the operating temperature of the battery module, achieve rapid and sufficient heat dissipation of the battery module, and improve the heat dissipation performance of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is an overall structure schematic diagram of an embodiment of the liquid cooling plate structure of the present application;

[0017] Fig. 2 It is a front view of an embodiment of the liquid cooling plate structure of the present application;

[0018] Fig. 3 It is an overall structure schematic diagram of an embodiment of the battery module of the present application;

[0019] Fig. 4 It is an overall structure schematic diagram of another embodiment of the battery module of the present application;

[0020] Fig. 5 It is a side view of another embodiment of the battery module of the present application;

[0021] Fig. 6 Structure diagram of still another embodiment of the battery module of the present application.

[0022] Explanation of reference numerals:

[0023] Liquid cooling plate structure-100, battery module-200;

[0024] Plate body-110, heat dissipation assembly-120, fire-fighting assembly-130, battery cell-210;

[0025] First surface-111, second surface-112, first inlet-121, first outlet-122, heat dissipation pipeline-123, second inlet-131, second outlet-132, fire-fighting pipeline-133, injection hole-134;

[0026] Heat dissipation pipe-1231, fire-fighting pipe-1331. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0029] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of those of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0030] The embodiments of the present application provide a liquid cooling plate structure and a battery module, which can be beneficial to improve the heat dissipation performance of the battery module and solve the problem of thermal runaway of high-density battery cells.

[0031] As Figs. 1-2As shown, the embodiment of the present application provides a liquid cooling plate structure 100, which comprises a plate body 110, a heat dissipation assembly 120 and a fire-fighting assembly 130. The heat dissipation assembly 120 is used for dissipating heat of the battery cell 210, and comprises a first inlet 121, a first outlet 122 and a heat dissipation pipeline 123. The first inlet 121 and the first outlet 122 are arranged in communication with the heat dissipation pipeline 123, and are arranged on a first surface 111 of the plate body 110. The fire-fighting assembly 130 is used for inhibiting thermal runaway of the battery cell 210, and comprises a second inlet 131, a second outlet 132 and a fire-fighting pipeline 133. The second inlet 131 and the second outlet 132 are arranged in communication with the fire-fighting pipeline 133, and are arranged on a second surface 112 of the plate body 110. The second surface 112 is located on a side of the plate body 110 close to the battery cell 210.

[0032] In the present application, the heat dissipation pipeline 123 and the fire-fighting pipeline 133 are arranged alternately in the plate body 110. For example, in the embodiment of the present application, a plurality of parallel channels are arranged in the plate body 110 in sequence. Different pipelines are arranged in adjacent two channels. A plurality of heat dissipation pipes 1231 and a plurality of fire-fighting pipes 1331 are arranged in different channels in sequence and alternately.

[0033] It can be understood that the heat dissipation pipeline 123 usually crosses the entire plate body 110 in a straight line or a curved form, so as to realize uniform distribution of the cooling liquid, which is beneficial to realize a wide heat dissipation area coverage and high heat dissipation efficiency. The fire-fighting pipeline 133 can be arranged along the gap direction of adjacent battery cells 210. The spray points of the fire-fighting pipeline 133 are aligned with the battery cells 210 through accurate positioning, so as to ensure that the fire-fighting pipeline 133 can act on a specific area when thermal runaway occurs.

[0034] In other embodiments, the plurality of heat dissipation pipes 1231 and the plurality of fire-fighting pipes 1331 can also be arranged in different manners. For example, the heat dissipation pipes 1231 can be arranged at a position close to the battery cells 210 in the middle of the plate body 110, and the fire-fighting pipes 1331 can be arranged at a position close to the gap of the battery cells 210, so as to achieve better heat dissipation and thermal runaway inhibition effects.

[0035] Further, the plate body 110 can also be provided with multiple layers of installation spaces in the thickness direction, and the heat dissipation pipe 1231 and the fire control pipe 1331 are respectively located in different installation spaces. For example, the heat dissipation pipe 1231 is located in the middle layer in the thickness direction of the plate body 110, which is used to maximize the absorption of heat generated by the battery cell 210, and the fire control pipe 1331 is located in the surface layer of the plate body 110 closer to the battery cell 210, so as to ensure that the fire control inhibitor can be quickly and directly sprayed onto the battery cell 210 in thermal runaway.

[0036] The specific arrangement of the heat dissipation pipe 123 and the fire control pipe 133 in the plate body 110 is not limited in the present application, and those skilled in the art can determine the arrangement of the heat dissipation pipe 123 and the fire control pipe 133 according to actual needs, so as to achieve better heat dissipation and thermal runaway suppression effect.

[0037] The technical scheme of the present application provides the heat dissipation assembly 120 and the fire control assembly 130 in the liquid cooling plate structure 100. The heat dissipation assembly 120 can dissipate heat from the battery cell 210, and the heat dissipation assembly 120 includes the heat dissipation pipe 123, the first inlet 121 and the first outlet 122 communicated with the heat dissipation pipe 123. The first inlet 121 and the first outlet 122 are arranged on the first surface 111 of the plate body 110. The fire control assembly 130 can suppress thermal runaway of the battery cell 210, and the fire control assembly 130 includes the fire control pipe 133, the second inlet 131 and the second outlet 132 communicated with the fire control pipe 133. The second inlet 131 and the second outlet 132 are arranged on the second surface 112 of the plate body 110. The first inlet 121 and the first outlet 122, the second inlet 131 and the second outlet 132 are arranged on different surfaces of the plate body 110, respectively. The heat dissipation pipe 123 and the fire control pipe 133 are arranged alternately in the plate body 110, which can effectively dissipate heat from the battery cell 210 and is beneficial to fire control to suppress thermal runaway of the battery cell 210, thereby improving the safety and reliability of the battery cell 210.

[0038] As shown in Figs. 1-2 The fire control assembly 130 also includes a plurality of spray holes 134 arranged in sequence on the second surface 112, and the plurality of spray holes 134 are respectively communicated with the fire control pipe 133. By arranging a plurality of spray holes 134 on the second surface 112, the second surface 112 is located on the side of the plate body 110 close to the battery cell 210, and the fire control inhibitor can be sprayed out of the spray hole 134, which is beneficial to fire control to suppress thermal runaway of the battery cell 210, thereby improving the safety and reliability of the battery cell 210.

[0039] In the embodiment of the present application, each injection hole 134 has an included angle with the second surface 112, so that the fire suppression agent forms an inclined angle with the plate body 110 when sprayed to the external environment by the injection hole 134. By setting an included angle between each injection hole 134 and the second surface 112, an inclined angle can be formed between the fire suppression agent and the second surface 112 of the plate body 110 when the fire suppression agent is sprayed from the injection hole 134, which is beneficial to avoid the contact surface of the battery cell 210 and improve the safety and reliability of the battery cell 210.

[0040] In the embodiment of the present application, the adjacent two battery cells 210 have a mounting gap, and the plurality of injection holes 134 are arranged one-to-one with the plurality of mounting gaps. By arranging the plurality of injection holes 134 one-to-one with the plurality of mounting gaps of the battery cell 210, the fire suppression agent can be sprayed into the mounting gap of the battery cell 210, which is beneficial to realize accurate spraying at a fixed point and avoid the contact surface of the battery cell 210, thereby improving the safety and reliability of the battery cell 210.

[0041] As shown in Figs. 1-2 The heat dissipation pipeline 123 includes a plurality of heat dissipation pipes 1231 that are in communication with each other, and the first inlet 121 and the first outlet 122 are arranged in communication with the plurality of heat dissipation pipes 1231. The fire control pipeline 133 includes a plurality of fire control pipes 1331 that are in communication with each other, and the second inlet 131 and the second outlet 132 are arranged in communication with the plurality of fire control pipes 1331. The heat dissipation pipeline 123 includes a plurality of heat dissipation pipes 1231 that are in communication with each other, and the fire control pipeline 133 includes a plurality of fire control pipes 1331 that are in communication with each other, which can increase the heat dissipation area, thereby effectively dissipating heat from the battery cell 210, and the plurality of fire control pipes 1331 can increase the capacity of the fire suppression agent, which is beneficial to further suppress the thermal runaway of the battery cell 210, thereby improving the safety and reliability of the battery cell 210.

[0042] In the embodiment of the present application, the cooling liquid is introduced into the heat dissipation pipeline 123 through the first inlet 121 to dissipate heat from the battery cell 210, and the fire suppression agent is introduced into the fire control pipeline 133 through the second inlet 131 to suppress the thermal runaway of the battery cell 210. The fire suppression agent is a perfluorohexanone and aqueous solution inhibitor, and those skilled in the art can also determine the type of fire suppression agent according to actual needs, and the present application does not limit the type of fire suppression agent.

[0043] As shown in Figs. 3-6 The present application also provides a battery module 200, which includes a plurality of battery cells 210 and the liquid cooling plate structure 100 according to any one of the preceding embodiments of the first aspect of the present application. The battery module 200 includes at least one liquid cooling plate structure 100, and the liquid cooling plate structure 100 is arranged outside the battery cell 210.

[0044] As shown in Figs. 1-2As shown, the embodiment of the present application provides a liquid cooling plate structure 100, which comprises a plate body 110, a heat dissipation assembly 120 and a fire control assembly 130. The heat dissipation assembly 120 is used for heat dissipation of the battery cell 210, and comprises a first inlet 121, a first outlet 122 and a heat dissipation pipeline 123. The first inlet 121 and the first outlet 122 are arranged in communication with the heat dissipation pipeline 123, and are arranged on the first surface 111 of the plate body 110. The fire control assembly 130 is used for inhibiting thermal runaway of the battery cell 210, and comprises a second inlet 131, a second outlet 132 and a fire control pipeline 133. The second inlet 131 and the second outlet 132 are arranged in communication with the fire control pipeline 133, and are arranged on the second surface 112 of the plate body 110. The second surface 112 is located on the side of the plate body 110 close to the battery cell 210. The heat dissipation pipeline 123 and the fire control pipeline 133 are arranged alternately in the plate body 110.

[0045] The technical scheme of the present application can effectively dissipate heat of the battery cell 210, and is conducive to inhibiting thermal runaway of the battery cell 210, thereby improving safety and reliability of the battery module 200.

[0046] A plurality of battery cells 210 are processed and assembled to form a combined battery pack. As shown in FIG. 1, the combined battery pack comprises a plurality of battery cells 210, a plurality of battery modules 200 and a plurality of battery packs 300. Fig. 3 As shown in an embodiment of the present application, one liquid cooling plate structure 100 is arranged on one side of the periphery of one combined battery pack. As shown in FIG. 2, the combined battery pack comprises a plurality of battery cells 210, a plurality of battery modules 200 and a plurality of battery packs 300. Figs. 4-5 As shown in another embodiment of the present application, one liquid cooling plate structure 100 is arranged on the side surface and the bottom of one combined battery pack, respectively. Three liquid cooling plate structures 100 are arranged on the periphery of the plurality of battery cells 210, which can greatly improve the heat dissipation efficiency of the battery module 200, is conducive to inhibiting thermal runaway of the battery cell 210, thereby improving safety and reliability of the battery module 200. Fig. 6As shown, in another embodiment of the present application, the plurality of combined battery packs are processed in combination, and three liquid cooling plate structures 100 are respectively arranged on the periphery of each combined battery pack.

[0047] In the embodiment of the present application, the battery module 200 further comprises a control assembly and a temperature detection assembly. The temperature detection assembly can detect the temperature of the battery cell 210 and send a temperature signal to the control assembly. The control assembly can control the opening or closing of the heat dissipation assembly 120 and the starting of the fire-fighting assembly 130 according to the temperature signal. The temperature detection assembly comprises a negative temperature coefficient thermistor (NTC) and a reminder. When the NTC detects that the temperature of the battery cell 210 is within a preset value range, a first temperature signal is sent to the control assembly, the control assembly controls the battery module 200 to enter a temperature control mode, and the heat dissipation assembly 120 can control the heat dissipation of the battery cell 210 module. When the NTC detects that the temperature of the battery cell 210 exceeds the preset value range, a second temperature signal is sent to the control assembly, the reminder alarms, and the control assembly controls the battery module 200 to enter a fire-fighting mode, and the fire-fighting assembly 130 can spray fire-fighting suppressant to the battery cell 210 module to suppress the thermal runaway of the battery cell 210. The control assembly controls the battery module 200 to switch between the heat dissipation mode and the fire-fighting mode, which can effectively dissipate heat from the battery cell 210 and help suppress the thermal runaway of the battery cell 210, thereby improving the safety and reliability of the battery module 200.

[0048] In the embodiment of the present application, the plurality of battery cells 210 are arranged in immersion isolation. By arranging the plurality of battery cells 210 in immersion isolation and cooperating with the liquid cooling plate structure 100, the operating temperature of the battery module 200 can be further controlled, the battery module 200 can be quickly and fully cooled, and the heat dissipation performance of the battery module 200 can be improved.

[0049] The above description is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation based on the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A liquid cold plate structure, comprising: The liquid cooling plate structure comprises: a plate body; a heat dissipation assembly for dissipating heat of the battery cell, the heat dissipation assembly comprising a first inlet, a first outlet and a heat dissipation pipeline, the first inlet, the first outlet and the heat dissipation pipeline being in communication, the first inlet and the first outlet being arranged on a first surface of the plate body, and the heat dissipation pipeline being arranged inside the plate body; and a fire-fighting assembly for suppressing thermal runaway of the battery cell, the fire-fighting assembly comprising a second inlet, a second outlet and a fire-fighting pipeline, the second inlet, the second outlet and the fire-fighting pipeline being in communication, the second inlet and the second outlet being arranged on a second surface of the plate body, and the fire-fighting pipeline being arranged inside the plate body.

2. The liquid cold plate structure of claim 1, wherein, The fire-fighting assembly further comprises: a plurality of spray holes arranged in sequence on the second surface, the plurality of spray holes being in communication with the fire-fighting pipeline respectively, and the second surface being located on a side of the plate body close to the battery cell.

3. The liquid cold plate structure of claim 2, wherein, Each of the spray holes has an included angle with the second surface, so that the fire-fighting agent in the fire-fighting pipeline forms an inclined angle with respect to the plate body when sprayed to the outside environment by the spray holes.

4. The liquid cold plate structure of claim 2, wherein, Adjacent two battery cells have a mounting gap, and the plurality of spray holes are arranged one-to-one with the plurality of mounting gaps.

5. The liquid cold plate structure of claim 1, wherein, The heat dissipation pipeline comprises a plurality of heat dissipation pipes in communication with each other, and the first inlet and the first outlet are arranged in communication with the plurality of heat dissipation pipes. The fire-fighting pipeline comprises a plurality of fire-fighting pipes in communication with each other, and the second inlet and the second outlet are arranged in communication with the plurality of fire-fighting pipes.

6. The liquid cold plate structure of claim 5, wherein, A plurality of channels are arranged in sequence inside the plate body, and the plurality of heat dissipation pipes and the plurality of fire-fighting pipes are arranged in sequence and alternately in different channels respectively.

7. The liquid cold plate structure of any one of claims 1 to 6, wherein, Cooling liquid is introduced into the heat dissipation pipeline through the first inlet to dissipate heat of the battery cell, and fire-fighting agent is introduced into the fire-fighting pipeline through the second inlet to suppress thermal runaway of the battery cell.

8. A battery module, characterized by The battery module comprises: a plurality of battery cells; and The liquid cooling plate structure according to any one of claims 1 to 7, the battery module comprising at least one of the liquid cooling plate structure, and the liquid cooling plate structure being arranged on an outer periphery of the battery cell.

9. The battery module of claim 8, wherein, The battery module further comprises a control assembly and a temperature detection assembly, the temperature detection assembly being capable of detecting a temperature of the battery cell and sending a temperature signal to the control assembly, and the control assembly being capable of controlling opening or closing of the heat dissipation assembly and starting of the fire-fighting assembly according to the temperature signal.

10. The battery module of claim 8, wherein, The plurality of battery cells are arranged in immersion isolation.

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