Liquid cooling plate, battery module and battery pack

Abstract

Provided in the present application are a liquid cooling plate, a battery module and a battery pack. A second plate member of the liquid cooling plate is provided with a first plate surface and a second plate surface, wherein the first plate surface and the second plate surface fit to a battery group; a first channel is formed between the first plate surface and the second plate surface by means of enclosure, and is filled with an elastic material; and the elastic material divides the first channel into a plurality of first sub-channels, and the elastic material is configured to absorb the expansion force of the battery group and apply a reaction force to the battery group.

Description

Liquid cooling plate, battery module and battery pack

[0001] This application claims priority to Chinese Patent Application No. 202421218698.X, filed with the Chinese Patent Office on May 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to a liquid cooling plate, a battery module, and a battery pack. Background Technology

[0003] Liquid cooling plates are crucial thermal management components in battery modules. They regulate battery temperature by exchanging heat with the battery, ensuring it operates within a safe range. Batteries expand during charging and discharging; cushioning components such as foam absorb this expansion. Technical issues

[0004] In related technologies, liquid cooling plates and buffer components are usually set separately and independently in the battery module, which occupies a large space in the battery module and has a poor effect on absorbing the expansion force of the battery, affecting the charge and discharge cycle performance of the battery and reducing the cycle life of the battery. Technical solutions

[0005] In a first aspect, this application provides a liquid-cooled plate, comprising:

[0006] The second plate has a first plate surface and a second plate surface. The first plate surface and the second plate surface are respectively attached to the battery pack. The first plate surface and the second plate surface enclose each other to form a first channel. The first channel is filled with an elastic material. The elastic material divides the first channel into multiple first sub-channels. The elastic material is used to absorb the expansion force of the battery pack and apply a reaction force to the battery pack.

[0007] Secondly, this application provides a battery module, including the liquid cooling plate provided in this application, wherein the battery pack is disposed on the liquid cooling plate.

[0008] Thirdly, this application provides a battery pack, including the battery module provided in this application. Beneficial effects

[0009] The beneficial effects of the liquid cooling plate, battery module, and battery pack provided in this application are as follows: The liquid cooling plate of this application includes a second plate, which is provided with a first plate surface and a second plate surface. The first plate surface and the second plate surface are respectively attached to the battery pack, and a first channel is formed between the first plate surface and the second plate surface. The first channel is filled with an elastic material. The elastic material divides the first channel into multiple first sub-channels. The elastic material is used to absorb the expansion force of the battery pack and apply a reaction force to the battery pack, thereby achieving cooling and heat dissipation of the battery pack. At the same time, when the battery pack expands, the expansion force of the battery can be absorbed by the elastic material in the second plate. This application improves the design of the liquid cooling plate, reducing its footprint in the battery module. By incorporating an elastic material within the first channel of the second plate, the first channel is divided into multiple interconnected sub-channels. Coolant is introduced into the first channel and transported through each sub-channel, thereby conducting coolant to the first and second surfaces of the second plate. When the battery pack is attached to the first and second surfaces of the second plate, the second plate can cool and dissipate heat. When the battery pack expands, the elastic material of the second plate absorbs the expansion force, allowing the second plate to be effectively compressed and providing a reaction force to the battery pack. This ensures the charge-discharge cycle performance of the battery pack, and the good absorption of expansion force improves the cycle life of the battery pack. Attached Figure Description

[0010] Figure 1 is a schematic diagram of the structure of a liquid cooling plate provided in one embodiment of this application;

[0011] Figure 2 is a cross-sectional structural diagram of a liquid cooling plate provided in one embodiment of this application;

[0012] Figure 3 is an enlarged structural diagram of point A in Figure 2;

[0013] Figure 4 is a schematic diagram of the structure of a liquid cooling plate provided in another embodiment of this application;

[0014] Figure 5 is a cross-sectional structural diagram of a liquid cooling plate provided in another embodiment of this application;

[0015] Figure 6 is a partial assembly structure diagram of the liquid cooling plate provided in this application;

[0016] Figure 7 is an enlarged structural diagram of point B in Figure 6.

[0017] Figure label:

[0018] 10. Liquid cooling plate; 100. First plate; 110. First through hole group; 112. First through hole; 120. Second channel; 122. Separator; 124. Second sub-channel; 200. Second plate; 210. First plate surface; 220. Second plate surface; 201. First channel; 202. First sub-channel; 230. Elastic material; 232. First through groove; 234. Separator; 300. First interface; 400. Second interface; 50. Battery pack; 510. Single battery cell. Embodiments of the present invention

[0019] In one embodiment, as shown in Figures 1, 3, and 6, a liquid cooling plate is provided, including a second plate 200. The second plate 200 is provided with a first plate surface 210 and a second plate surface 220, which are respectively attached to a battery pack 50. A first channel 201 is formed between the first plate surface 210 and the second plate surface 220, and the first channel 201 is filled with an elastic material 230. The elastic material 230 divides the first channel 201 into multiple first sub-channels 202. The elastic material 230 is used to absorb the expansion force of the battery pack 50 and apply a reaction force to the battery pack 50.

[0020] The battery pack 50 may include at least one individual battery cell 510. Each individual battery cell 510 may be connected in series, in parallel, or in a series-parallel connection. The individual battery cell 510 may be a lithium battery cell. The shape of the individual battery cell 510 may be, but is not limited to, square. For example, the individual battery cell 510 is cuboid in shape. The individual battery cell 510 includes a bottom surface, a top surface, and four side surfaces. The four side surfaces may be divided into two large-area side surfaces and two small-area side surfaces. An electrode post may be provided on the top surface of the individual battery cell 510, and an explosion-proof valve may be provided on the bottom surface of the individual battery cell 510.

[0021] The second plate 200 may be flat and may be made of a metal or non-metal plate with good heat dissipation. For example, the second plate 200 may be made of aluminum. The second plate 200 has a first plate surface 210 and a second plate surface 220, with the first plate surface 210 and the second plate surface 220 facing each other. One side of each individual battery cell 510 in the first support region is attached to the first plate surface 210 of the second plate 200, and one side of each individual battery cell 510 in the second support region is attached to the second plate surface 220 of the second plate 200. For example, a large area side of each individual battery cell 510 in the first support region is attached to the first plate surface 210 of the second plate 200, and a large area side of each individual battery cell 510 in the second support region is attached to the second plate surface 220 of the second plate 200. In one example, the corresponding individual cell 510 can be set on the first plate surface 210 and the second plate surface 220 of the second plate 200 by means of bonding, for example, thermally conductive adhesive can be used to bond the corresponding individual cell 510 to the first plate surface 210 and the second plate surface 220 of the second plate 200.

[0022] The first surface 210 and the second surface 220 of the second plate 200 are spaced apart, and the first surface 210 and the second surface 220 enclose a first channel 201, meaning the second plate 200 has a hollow structure. The first channel 201 is filled with an elastic material 230. The elastic material 230 can be used to divide the first channel 201 into multiple first sub-channels 202. For example, the elastic material 230 can be disposed within the first channel 201 by welding, snap-fitting, or bonding. In another example, the elastic material 230 and the second plate 200 can be an integrally formed structure.

[0023] By filling the first channel 201 with elastic material 230, when coolant is introduced into the first channel 201 of the second plate 200, the coolant can flow through each first sub-channel 202, that is, the coolant can directly contact the elastic material 230, the first plate surface 210 and the second plate surface 220, thereby conducting heat to the elastic material 230, the first plate surface 210 and the second plate surface 220. In addition, based on the elastic material 230 contacting the first plate surface 210 and the second plate surface 220 respectively, the elastic material 230 can conduct heat to the first plate surface 210 and the second plate surface 220 respectively, thereby improving the heat conduction efficiency of the first plate surface 210 and the second plate surface 220. Thus, the first plate surface 210 of the second plate 200 can cool and dissipate heat to each corresponding single cell 510, and the second plate surface 220 of the second plate 200 can cool and dissipate heat to each corresponding single cell 510, thereby improving the heat dissipation efficiency of each single cell 510 contained in the battery pack 50.

[0024] When any single cell 510 in the battery pack 50 expands, the corresponding position of the elastic material 230 can be effectively compressed to absorb the expansion force of the battery pack 50. At the same time, the corresponding position of the elastic material 230 can apply a reaction force to the expanded single cell 510, thereby improving the robustness of the battery pack 50 and thus enhancing the charge-discharge cycle performance of the battery pack 50.

[0025] In this embodiment, the second plate 200 is provided with a first plate surface 210 and a second plate surface 220. The first plate surface 210 and the second plate surface 220 are respectively attached to the battery pack 50. The first plate surface 210 and the second plate surface 220 enclose a first channel 201, which is filled with an elastic material 230. The elastic material 230 divides the first channel 201 into multiple first sub-channels 202. The elastic material 230 is used to absorb the expansion force of the battery pack 50 and apply a reaction force to the battery pack 50, thereby achieving cooling and heat dissipation of the battery pack 50. At the same time, when the battery pack 50 expands, the elastic material 230 in the second plate 200 can absorb the expansion force of the battery. This embodiment of the application improves the design of the liquid cooling plate 10, resulting in a smaller footprint in the battery module. By providing an elastic material 230 within the first channel 201 of the second plate 200, the first channel 201 is divided into multiple interconnected first sub-channels 202. Coolant is introduced into the first channel 201 and transported through each first sub-channel 202, thereby conducting coolant to the first plate surface 210 and the second plate surface 220 of the second plate 200. When the battery pack 50 is attached to the first plate surface 210 and the second plate surface 220 of the second plate 200, the second plate 200 can cool and dissipate heat from the battery pack 50. When the battery pack 50 expands, the elastic material 230 of the second plate 200 can absorb the expansion force of the battery pack 50, allowing the second plate 200 to be effectively compressed and providing a reaction force to the battery pack 50. This ensures the charge-discharge cycle performance of the battery pack 50, and the good absorption effect of the expansion force of the battery pack 50 improves the cycle life of the battery pack 50.

[0026] In one embodiment, as shown in Figures 2 and 3, the elastic material 230 is provided with a plurality of first through slots 232. The first sub-channel 202 is formed by the interconnection of the plurality of first through slots 232.

[0027] The elastic material 230 is provided with a plurality of first through grooves 232 of the same size. For example, the elastic material 230 is also provided with a plurality of first through grooves 232 of different sizes. The plurality of first through grooves 232 can be through grooves of the same shape or through grooves of different shapes.

[0028] The elastic material 230 includes multiple first through grooves 232, which can be divided into multiple groups of first through grooves 232. Each group of first through grooves 232 includes multiple first through grooves 232. The first sub-channel 202 is formed by connecting multiple corresponding first through grooves 232. When coolant is input into the first channel 201 of the second plate 200, the coolant can flow through each first sub-channel 202. The coolant is transported through each first through groove 232 in the corresponding first sub-channel 202, realizing the conduction of coolant to the elastic material 230, the first plate surface 210 and the second plate surface 220. This increases the contact area between the elastic material 230 and the coolant, and improves the conduction efficiency of the first plate surface 210 and the second plate surface 220. Thus, the first plate surface 210 of the second plate 200 can cool and dissipate heat for each corresponding single cell 510, and the second plate surface 220 of the second plate 200 can cool and dissipate heat for each corresponding single cell 510, thereby improving the heat dissipation efficiency of each single cell 510 included in the battery pack 50.

[0029] In one example, the first channel 232 is provided with at least two openings, and multiple first channels 232 are interconnected. Coolant can flow through each first channel 232, so that the coolant can fully contact the elastic material 230 and the first plate surface 210 and the second plate surface 220 of the second plate 200, thereby increasing the contact area between the coolant and the elastic material 230 and improving the cooling efficiency of the first plate surface 210 and the second plate surface 220.

[0030] In one embodiment, as shown in Figures 2 and 3, the elastic material 230 includes a plurality of spacers 234. The first channel 232 is formed by at least one spacer 234.

[0031] In this embodiment, each spacer 234 can be a spacer 234 with the same shape and size. In another example, each spacer 234 can also be a spacer 234 with different shapes and sizes. Multiple spacers 234 can be integrally formed into an elastic material 230. In another example, multiple spacers 234 can also be integrally formed into an elastic material 230 by welding or bonding.

[0032] The first channel 232 is formed by at least one separator 234, and the first sub-channel 202 is formed by multiple corresponding first channels 232 connected together. When coolant is input into the first channel 201 of the second plate 200, the coolant can flow through the corresponding first channel 232 to conduct heat to the elastic material 230, the first plate surface 210 and the second plate surface 220, thereby enabling the first plate surface 210 of the second plate 200 to cool and dissipate heat to each corresponding single cell 510, and the second plate surface 220 of the second plate 200 to cool and dissipate heat to each corresponding single cell 510, thereby improving the heat dissipation efficiency of each single cell 510 contained in the battery pack 50.

[0033] In one embodiment, the first through-slot 232 is circular or polygonal. For example, the opening of the first through-slot 232 may be hexagonal. In another example, the first through-slot 232 may also be irregularly shaped. To facilitate the processing and shaping of the elastic material 230, each first through-slot 232 contained in the elastic material 230 may have a different shape.

[0034] In one embodiment, the elastic material 230 is a foamed aluminum component. Foamed aluminum components are lightweight, have high bending strength, and are highly corrosion-resistant. By using foamed aluminum components as the elastic material 230, the foamed aluminum component has multiple interconnected pores, allowing the elastic material 230 to form multiple first through-grooves 232. This provides good heat dissipation and the ability to transport and supply coolant, thus satisfying the coolant transfer requirements. Furthermore, foamed aluminum components are excellent elastic compression buffer materials with a good stress-strain curve. Therefore, when any single cell 510 in the battery pack 50 expands, the corresponding location of the elastic material 230 can be effectively compressed, absorbing the expansion force of the battery pack 50. Simultaneously, the corresponding location of the elastic material 230 can apply a reaction force to the expanding single cell 510, achieving a dual effect of compression and rebound, improving the robustness of the battery pack 50, and thus enhancing the charge-discharge cycle performance of the battery pack 50.

[0035] In this design, by providing an elastic material 230 (aluminum foam) in the first channel 201 of the second plate 200, the strength of the second plate 200 can be enhanced, allowing the second plate 200 to be used as a crossbeam of the battery box, thereby simplifying the structure of the battery box and improving the space utilization of the battery box.

[0036] In one embodiment, as shown in Figures 1, 2, and 5, the liquid cooling plate 10 further includes a first plate 100. The first plate 100 is used to support the battery pack 50, and a second plate 200 is disposed on the first plate 100.

[0037] The first plate 100 may be flat and may be made of a metal or non-metal plate with good support strength. For example, the first plate 100 may be made of aluminum. The first plate 100 is used to support the battery pack 50. For example, the bottom surface of the corresponding individual battery cell 510 may be attached to the first plate 100. Exemplarily, the bottom surface of the individual battery cell 510 may be attached to the first plate 100 by means of adhesive or snap-fit. In another example, the individual battery cell 510 may also be locked and fixed to the first plate 100 by fasteners.

[0038] The second plate 200 can be vertically disposed on the first plate 100, making the liquid cooling plate 10 T-shaped. For example, the second plate 200 can be disposed based on the central axis of the length direction of the first plate 100, dividing the support surface of the first plate 100 into a first support area and a second support area. The first support area can be used to support multiple individual battery cells 510, and the second support area can be used to support multiple individual battery cells 510.

[0039] In one embodiment, as shown in Figures 1, 4, and 5, the first plate 100 is provided with a first through-hole group 110 and a second channel 120, the second channel 120 being connected to the first through-hole group 110. The first through-hole group 110 is correspondingly provided with the explosion-proof valve of the battery pack 50.

[0040] For example, the first plate 100 may have a third plate surface and a fourth plate surface, with the third plate surface facing the fourth plate surface. The third plate surface is used to fit and support the battery pack 50. The fourth plate surface is used to fit and support the bottom surface of the battery box. The third plate surface and the fourth plate surface are spaced apart, so that the third plate surface and the fourth plate surface enclose and form a second channel 120. The second channel 120 can be a pressure relief channel, and the second channel 120 connects to the first through hole group 110. The first through hole group 110 is set on the third plate surface of the first plate 100, and the explosion-proof valve of the battery pack 50 is correspondingly set in the first through hole group 110. When the battery pack 50 experiences thermal runaway, the corresponding explosion-proof valve is opened, and the individual battery cells 510 that have experienced thermal runaway in the battery pack 50 can discharge the generated high-temperature and high-pressure substances through the first through hole group 110 to the second channel 120, thereby achieving thermal runaway pressure relief of the battery pack 50 and improving the safety of the battery pack 50.

[0041] In one example, the second channel 120 can also be a liquid cooling channel. For example, coolant can be transferred to the second channel 120, and then the bottom surface of the battery pack 50 can be cooled and dissipated through the third plate of the first plate 100, thereby improving the heat dissipation efficiency of the battery pack 50.

[0042] In one embodiment, as shown in Figures 4, 5, and 7, the battery pack 50 includes multiple individual battery cells 510, and each individual battery cell 510 has an explosion-proof valve on its bottom surface. A first through-hole group 110 is provided with multiple first through-holes 112. Each first through-hole 112 corresponds one-to-one with the explosion-proof valve of each individual battery cell 510.

[0043] For example, a single battery cell 510 can be rectangular in shape. An explosion-proof valve is provided on the bottom surface of the single battery cell 510, and an electrode post is provided on the top surface of the single battery cell 510, thus isolating the electrode post of the single battery cell 510 from the second channel 120. By setting the explosion-proof valve of the single battery cell 510 corresponding to the corresponding first through hole 112 of the first plate 100, with each first through hole 112 connected to the second channel 120, when any single battery cell 510 experiences thermal runaway, the explosion-proof valve of the thermally runaway single battery cell 510 is opened. The thermally runaway single battery cell 510 can discharge the generated high-temperature and high-pressure substances through the corresponding first through hole 112 to the second channel 120, thereby relieving the thermal runaway pressure of the single battery cell 510 and improving the safety of the single battery cell 510.

[0044] In one embodiment, as shown in Figures 1 and 3, a partition 122 is provided within the second channel 120. The partition 122 divides the second channel 120 into two second sub-channels 124, each of which is connected to a plurality of first through holes 112. A second plate 200 is correspondingly disposed on the partition 122.

[0045] The partition 122 can be installed within the second channel 120 by means of welding or other methods. In another example, the partition 122 and the first plate 100 can be an integrally formed structure.

[0046] For example, the separator 122 can be arranged along the central axis of the second channel 120 along its length, dividing the second channel 120 into two second sub-channels 124. The second plate 200 can be arranged corresponding to the separator 122, thereby dividing the third plate surface of the first plate 100 into a first support area and a second support area. The first support area can be used to support multiple individual battery cells 510, and the second support area can be used to support multiple individual battery cells 510. One second sub-channel 124 can be used to depressurize each individual battery cell 510 in the first support area, and the other second sub-channel 124 can be used to depressurize each individual battery cell 510 in the second support area. By setting the separator 122 in the second channel 120, the strength of the first plate 100 is strengthened, thereby achieving stable support for the battery pack 50.

[0047] In one embodiment, as shown in Figures 1 and 4, the liquid cooling plate 10 further includes a first interface 300 and a second interface 400. The first interface 300 is connected to a first end of the first channel 201, and the second interface 400 is connected to a second end of the first channel 201.

[0048] The first interface 300 can be used to input coolant, and the second interface 400 can be used to output coolant.

[0049] The first interface 300 can be disposed at the first end of the first channel 201 by means of screwing, snap-fitting, or bonding, and the first interface 300 is connected to the first end of the first channel 201. The second interface 400 can be disposed at the second end of the first channel 201 by means of screwing, snap-fitting, or bonding, and the second interface 400 is connected to the second end of the first channel 201.

[0050] When coolant is input into the first interface 300, the coolant is transmitted through the first interface 300 to the first channel 201 of the second board 200. After being transmitted through each first sub-channel 202, the coolant is discharged through the second interface 400, realizing liquid cooling circulation of the first channel 201. Thus, the first plate surface 210 of the second board 200 can cool and dissipate heat for each corresponding single cell 510, and the second plate surface 220 of the second board 200 can cool and dissipate heat for each corresponding single cell 510, improving the heat dissipation efficiency of each single cell 510 contained in the battery pack 50.

[0051] The first interface 300 can be connected to the first end of the liquid cooling device through the first pipe, and the second interface 400 can be connected to the second end of the liquid cooling device through the second pipe. The liquid cooling device may include a liquid container, a pump and a refrigeration module. The liquid container, the pump, the refrigeration module and the first channel 201 are connected to form a liquid cooling circulation loop.

[0052] In one embodiment, as shown in Figures 6 and 7, a battery module is also provided, including a battery pack 50 and a liquid cooling plate 10 provided in this embodiment. The battery pack 50 is disposed on the liquid cooling plate 10.

[0053] For a detailed description of the battery pack 50 and the liquid cooling plate 10, please refer to the detailed description of the battery pack 50 and the liquid cooling plate 10 in the embodiments of this application, which will not be repeated here.

[0054] The second plate 200 is disposed on the first plate 100. The battery pack 50 is disposed on the first plate 100. The second plate 200 has a first plate surface 210 and a second plate surface 220, which are respectively attached to the battery pack 50. The first plate surface 210 and the second plate surface 220 enclose a first channel 201, and an elastic material 230 is disposed within the first channel 201. The elastic material 230 is used to divide the first channel 201 into multiple first sub-channels 202, which are interconnected. The elastic material 230 also absorbs the expansion force of the battery pack 50 and applies a reaction force to the battery pack 50, thereby achieving cooling and heat dissipation of the battery pack 50. Simultaneously, when the battery pack 50 expands, the elastic material 230 within the second plate 200 can absorb the expansion force of the battery.

[0055] In this embodiment, by improving the design of the liquid cooling plate, the space occupied by the battery module is reduced. By filling the first channel of the second plate with elastic material, the first channel is divided into multiple interconnected first sub-channels. Coolant is introduced into the first channel and transported through each first sub-channel, thereby conducting coolant to the first and second surfaces of the second plate. When the battery pack is attached to the first and second surfaces of the second plate, the second plate can cool and dissipate heat from the battery pack. When the battery pack expands, the elastic material of the second plate can absorb the expansion force of the battery pack, so that the second plate can be effectively compressed and provide a reaction force to the battery pack, ensuring the charge and discharge cycle performance of the battery module. The expansion force absorption effect of the battery module is good, which improves the cycle life of the battery module.

[0056] In one embodiment, a battery pack is also provided, including the battery module provided in the embodiments of this application.

[0057] For a detailed description of the battery module, please refer to the specific description of the battery module in the embodiments of this application, which will not be repeated here.

[0058] For example, the battery pack may include a housing, and the battery modules are disposed within the housing, thus integrating the battery modules. In the battery module, the first channel of the second plate is divided into multiple interconnected first sub-channels by filling the first channel with an elastic material. Coolant is introduced into the first channel, and the coolant is transported through each first sub-channel, thereby conducting coolant to the first and second surfaces of the second plate. When the battery pack is attached to the first and second surfaces of the second plate, the second plate can cool and dissipate heat from the battery pack. When the battery pack expands, the elastic material of the second plate absorbs the expansion force, allowing the second plate to be effectively compressed and providing a reaction force to the battery pack. This ensures the charge-discharge cycle performance of the battery module, and the good absorption of expansion force improves the cycle life of the battery module.

[0059] The battery pack may also include components such as a BMS. A specific battery pack may include more components than those described in the embodiments of this application, or combine certain components, or have different component arrangements.

Claims

1. A liquid-cooled plate, comprising: The second plate has a first plate surface and a second plate surface. The first plate surface and the second plate surface are respectively attached to the battery pack. The first plate surface and the second plate surface form a first channel, and the first channel is filled with elastic material. The elastic material divides the first channel into multiple first sub-channels; the elastic material is used to absorb the expansion force of the battery pack and apply a reaction force to the battery pack.

2. The liquid cooling plate according to claim 1, wherein, The elastic material is provided with a plurality of first through grooves; The first sub-channel is formed by connecting multiple first through slots.

3. The liquid cooling plate according to claim 2, wherein, The elastic material includes multiple spacers; The first channel is formed by at least one of the aforementioned spacers.

4. The liquid cooling plate according to claim 3, wherein, The first through slot is circular or polygonal.

5. The liquid cooling plate according to claim 1, wherein, The elastic material is aluminum foam.

6. The liquid cooling plate according to any one of claims 1 to 5 further includes a first plate; the first plate is used to support the battery pack, and the second plate is disposed on the first plate.

7. The liquid cooling plate according to claim 6, wherein, The first plate is provided with a first through hole group and a second channel, the second channel being connected to the first through hole group; the first through hole group is correspondingly provided with the explosion-proof valve of the battery pack; The battery pack includes at least one individual battery cell, and an explosion-proof valve is provided on the bottom surface of the individual battery cell; the first through hole group is provided with a plurality of first through holes; each first through hole is provided in a one-to-one correspondence with the explosion-proof valve of each individual battery cell.

8. The liquid cooling plate according to claim 7, wherein, A partition is provided inside the second channel; the partition is used to divide the second channel into two second sub-channels, and the second sub-channels are respectively connected to multiple first through holes; The second plate is correspondingly disposed on the partition.

9. A battery module, comprising a battery pack and a liquid cooling plate as described in any one of claims 1 to 8; The battery pack is mounted on the liquid cooling plate.

10. A battery pack comprising the battery module as described in claim 9.

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