Liquid cooling plate assembly and battery pack

Abstract

This utility model discloses a liquid-cooled plate assembly and a battery pack, relating to the field of battery technology. The liquid-cooled plate assembly includes a first liquid-cooled plate body, a second liquid-cooled plate body, and an absorption expansion plate. The first and second liquid-cooled plate bodies are respectively attached to opposite side surfaces of the absorption expansion plate. The absorption expansion plate is configured to deform and adjust the distance between the first and second liquid-cooled plate bodies when subjected to external pressure. Compared to the prior art, this utility model embodiment, by adding an absorption expansion plate, utilizes the absorption expansion plate to absorb the expansion force of the battery cell, thereby reducing the risk of damage from compression while maintaining the liquid cooling effect and improving the service life of the liquid-cooled plate.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a liquid cooling plate assembly and a battery pack. Background Technology

[0002] Liquid cooling plates are typically placed between the cells in a battery pack to dissipate heat from the large surface area of ​​the cells. Traditional large-area liquid cooling plates consist of only two parts: a harmonica plate and a current collector, which are attached to the surface of the cells. Furthermore, to ensure heat conduction, traditional large-area liquid cooling plates are tightly fitted to the cells. This means that when the cells expand thermally, they directly compress the large-area liquid cooling plate. Since the large-area liquid cooling plate cannot absorb the expansion force of the cells, it is easily damaged, reducing its lifespan and affecting its heat dissipation performance. Utility Model Content

[0003] The purpose of this invention is to provide a liquid cooling plate assembly and a battery pack that can absorb the expansion force between battery cells while achieving the liquid cooling effect, reducing the risk of damage due to compression and improving service life.

[0004] The embodiments of this utility model are implemented as follows:

[0005] In a first aspect, the present invention provides a liquid cooling plate assembly, including a first liquid cooling plate body, a second liquid cooling plate body, and an absorption expansion plate. The first liquid cooling plate body and the second liquid cooling plate body are respectively attached to opposite side surfaces of the absorption expansion plate. The absorption expansion plate is configured to deform and adjust the distance between the first liquid cooling plate body and the second liquid cooling plate body when the first liquid cooling plate body and / or the second liquid cooling plate body are subjected to external force.

[0006] In an optional embodiment, the expansion plate includes a first deformation plate, a second deformation plate, and a connecting plate. The first deformation plate and the second deformation plate are arranged at intervals relative to each other. The first deformation plate is attached to the side of the first liquid cooling plate facing the second liquid cooling plate, and the second deformation plate is attached to the side of the second liquid cooling plate facing the first liquid cooling plate. The connecting plate is respectively connected between the two ends of the first deformation plate and the second deformation plate, so that the first deformation plate, the second deformation plate, and the two connecting plates are connected end to end to form a deformation cavity.

[0007] In an optional embodiment, the first deformation plate has a first deformation protrusion on the side surface away from the first liquid cooling plate, and the second deformation plate has a second deformation protrusion on the side surface away from the second liquid cooling plate, with the deformation cavity located between the first deformation protrusion and the second deformation protrusion.

[0008] In an optional embodiment, the first deformation protrusion and the second deformation protrusion are misaligned.

[0009] In an optional embodiment, both the first deformable protrusion and the second deformable protrusion are semi-cylindrical bosses.

[0010] In an optional embodiment, the protrusion height H of the first deformation protrusion relative to the first deformation plate is less than half of the distance L between the first deformation plate and the second deformation plate; and / or, the protrusion height H of the second deformation protrusion relative to the second deformation plate is less than half of the distance L between the first deformation plate and the second deformation plate.

[0011] In an optional embodiment, the opposite two side surfaces of the absorption expansion plate are respectively provided with a first mounting groove and a second mounting groove, and the side surface of the first liquid cooling plate body near the second liquid cooling plate body is provided with a first mounting boss, which is correspondingly mounted in the first mounting groove so that the first liquid cooling plate body is fastened to the absorption expansion plate; the side surface of the second liquid cooling plate body near the first liquid cooling plate body is provided with a second mounting boss, which is correspondingly mounted in the second mounting groove so that the second liquid cooling plate body is fastened to the absorption expansion plate;

[0012] The first assembly groove and the second assembly groove are respectively provided in the first deformation protrusion and the second deformation protrusion.

[0013] On the other hand, this utility model embodiment provides a battery pack including a housing, a plurality of battery cells and the aforementioned liquid cooling plate assembly. The plurality of battery cells are disposed in the housing, and the liquid cooling plate assembly is disposed between two adjacent battery cells. The first liquid cooling plate and the second liquid cooling plate are respectively attached to the sidewalls of two adjacent battery cells.

[0014] In an optional embodiment, the bottom wall of the housing is provided with a support platform, and the support platform is provided with a first support groove and a second support groove at intervals on the side facing the battery cell. A support platform is formed between the first support groove and the second support groove. The first liquid cooling plate is correspondingly assembled in the first support groove, the second liquid cooling plate is correspondingly assembled in the second support groove, and the expansion absorption plate is correspondingly placed on the support platform.

[0015] In an optional embodiment, a first thermally conductive adhesive layer is provided between the first liquid cooling plate and the side wall of the battery cell, and a second thermally conductive adhesive layer is provided between the second liquid cooling plate and the side wall of the battery cell.

[0016] The beneficial effects of this utility model embodiment include:

[0017] The liquid cooling plate assembly provided in this embodiment of the invention has a first liquid cooling plate and a second liquid cooling plate respectively attached to the two sides of an expansion-absorbing plate. The expansion-absorbing plate can deform and adjust the distance between the first and second liquid cooling plates when subjected to external pressure, thereby absorbing the expansion force of the battery cell. Compared to the prior art, this embodiment of the invention, by adding an expansion-absorbing plate to absorb the expansion force of the battery cell, can reduce the risk of damage from compression while maintaining the liquid cooling effect, thus improving the service life of the liquid cooling plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate assembly provided in an embodiment of the present utility model;

[0020] Figure 2 A cross-sectional structural schematic diagram of the liquid cooling plate assembly provided in an embodiment of this utility model;

[0021] Figure 3 An exploded cross-sectional view of the liquid cooling plate assembly provided in an embodiment of this utility model;

[0022] Figure 4 An exploded view of the liquid cooling plate assembly provided in an embodiment of this utility model;

[0023] Figure 5 This is a partial structural schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0024] Figure 6 for Figure 5 Cross-sectional view of the battery pack;

[0025] Figure 7 This is a partial structural diagram of the battery pack provided in an embodiment of the present invention.

[0026] icon:

[0027] 100-Liquid cooling plate assembly; 110-First liquid cooling plate body; 111-First mounting boss; 112-First manifold; 113-Liquid inlet; 114-Liquid outlet; 130-Second liquid cooling plate body; 131-Second mounting boss; 132-Second manifold; 150-Absorbing expansion plate; 151-First deformation plate; 152-Second deformation plate; 153-Connecting plate; 154-Deformation cavity; 155-First deformation protrusion; 156-Second deformation protrusion; 157-First mounting groove; 158-Second mounting groove; 200-Battery pack; 210-Casing; 220-Battery cell; 230-Support platform; 231-First support groove; 232-Second support groove; 233-Support surface; 250-First thermally conductive adhesive layer; 270-Second thermally conductive adhesive layer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] See Figures 1 to 4 This utility model provides a liquid cooling plate assembly 100. By adding an expansion absorption plate 150, the expansion absorption plate 150 is used to absorb the expansion force of the battery cell 220, which can reduce the risk of damage due to compression while satisfying the liquid cooling effect and improve the service life of the liquid cooling plate.

[0035] The liquid cooling plate assembly 100 provided in this embodiment of the present invention includes a first liquid cooling plate body 110, a second liquid cooling plate body 130, and an absorption expansion plate 150. The first liquid cooling plate body 110 and the second liquid cooling plate body 130 are respectively attached to opposite side surfaces of the absorption expansion plate 150. The absorption expansion plate 150 is configured to deform and adjust the distance between the first liquid cooling plate body 110 and the second liquid cooling plate body 130 when the first liquid cooling plate body 110 and / or the second liquid cooling plate body 130 are subjected to external force.

[0036] It is worth noting that the expansion plate 150 here has a certain deformation capacity, and is preferably made of high-strength plastic. It can absorb the expansion force of the battery cell 220 through compression deformation, thereby adjusting the distance between the first liquid cooling plate 110 and the second liquid cooling plate 130. The first liquid cooling plate 110 and the second liquid cooling plate 130 can be tightly attached to the two side surfaces of the expansion plate 150, thereby ensuring that the expansion force is smoothly transmitted to the expansion plate 150.

[0037] It should be noted that both the first liquid cooling plate 110 and the second liquid cooling plate 130 are harmonica plates with multiple internal flow channels. The first liquid cooling plate 110 is provided with a first flow collector 112 at its end, and the second liquid cooling plate 130 is provided with a second flow collector 132 at its end. Both the first flow collector 112 and the second flow collector 132 are provided with a liquid inlet 113 and a liquid outlet 114. For the specific structure of the first liquid cooling plate 110 and the second liquid cooling plate 130 and the liquid cooling principle, please refer to the liquid cooling plate structure in the prior art.

[0038] In some embodiments, the expansion plate 150 includes a first deformation plate 151, a second deformation plate 152, and a connecting plate 153. The first deformation plate 151 and the second deformation plate 152 are arranged at intervals relative to each other. The first deformation plate 151 is attached to the side of the first liquid cooling plate 110 facing the second liquid cooling plate 130, and the second deformation plate 152 is attached to the side of the second liquid cooling plate 130 facing the first liquid cooling plate 110. The connecting plate 153 is connected between the two ends of the first deformation plate 151 and the second deformation plate 152, so that the first deformation plate 151, the second deformation plate 152, and the two connecting plates 153 are connected end to end to form a deformation cavity 154. Specifically, the first deformation plate 151, the connecting plate 153, and the second deformation plate 152 are integrally arranged. There are two connecting plates 153. The two connecting plates 153, the first deformation plate 151, and the second deformation plate 152 can be connected end to end to form a rectangular frame structure. The connecting plates 153 are located on the upper and lower sides, and the first deformation plate 151 and the second deformation plate 152 are located on the left and right sides, respectively. This results in a deformation cavity 154 between the first deformation plate 151 and the second deformation plate 152. The deformation cavity 154 can serve as a deformation avoidance space, thereby forming an internal gap. When the first deformation plate 151 and the second deformation plate 152 are displaced and deformed by the expansion force of the battery cell 220, the deformation cavity 154 can bear the deformation and absorb the expansion force of the battery cell 220.

[0039] In some embodiments, a first deformation protrusion 155 is provided on the surface of the first deformation plate 151 away from the first liquid cooling plate 110, and a second deformation protrusion 156 is provided on the surface of the second deformation plate 152 away from the second liquid cooling plate 130. The deformation cavity 154 is located between the first deformation protrusion 155 and the second deformation protrusion 156. Specifically, the first deformation protrusion 155 and the second deformation protrusion 156 are spaced apart from each other, thereby ensuring sufficient deformation gap space. Furthermore, the first deformation protrusion 155 and the second deformation protrusion 156 can also enhance the overall structural strength, making the first deformation plate 151 and the second deformation plate 152 more impact-resistant and with better cushioning toughness.

[0040] Furthermore, the first deformation protrusion 155 and the second deformation protrusion 156 are staggered. Specifically, the first deformation protrusion 155 and the second deformation protrusion 156 are arranged alternately on the left and right sides, which can further ensure that there are gaps between the left and right deformation protrusions. When the battery cells 220 are arranged and compressed, the expansion force of the battery cells 220 can be absorbed through the deformation of the gaps. In addition, the staggered arrangement of the first deformation protrusion 155 and the second deformation protrusion 156 can also avoid the risk of the first deformation protrusion 155 and the second deformation protrusion 156 directly hitting each other, making the deformation capability of the first deformation plate 151 and the second deformation plate 152 stronger.

[0041] In some embodiments, both the first deformation protrusion 155 and the second deformation protrusion 156 are semi-cylindrical bosses. Specifically, both the first deformation protrusion 155 and the second deformation protrusion 156 are semi-cylindrical strip bosses, and their extension direction is consistent with the liquid flow direction within the liquid cooling plate. Using semi-circular first deformation protrusions 155 and second deformation protrusions 156, and staggering their arrangement, can minimize interference between the edges of adjacent first deformation protrusions 155 and second deformation protrusions 156 during deformation, thereby improving their deformation capability.

[0042] Furthermore, the height H of the first deformation protrusion 155 relative to the first deformation plate 151 is less than half the distance L between the first deformation plate 151 and the second deformation plate 152; and / or, the height H of the second deformation protrusion 156 relative to the second deformation plate 152 is less than half the distance L between the first deformation plate 151 and the second deformation plate 152. Preferably, the distance L between the first deformation plate 151 and the second deformation plate 152 is the width of the deformation cavity 154. The heights of both the first deformation protrusion 155 and the second deformation protrusion 156 are less than half the distance between the first deformation plate 151 and the second deformation plate 152, thereby ensuring that neither the first deformation protrusion 155 nor the second deformation protrusion 156 crosses the centerline of the deformation cavity 154, further guaranteeing that there is a gap between the left and right first deformation protrusions 155 and second deformation protrusions 156.

[0043] In some embodiments, the opposite side surfaces of the expansion plate 150 are respectively provided with a first mounting groove 157 and a second mounting groove 158. The surface of the first liquid cooling plate 110 near the second liquid cooling plate 130 is provided with a first mounting boss 111, which is fitted into the first mounting groove 157, so that the first liquid cooling plate 110 is fastened onto the expansion plate 150. The surface of the second liquid cooling plate 130 near the first liquid cooling plate 110 is provided with a second mounting boss 131, which is fitted into the second mounting groove 158, so that the second liquid cooling plate 130 is fastened onto the expansion plate 150. Specifically, the first mounting boss 111 can be inserted into the first mounting groove 157, thereby achieving a detachable connection between the first liquid cooling plate 110 and the expansion plate 150. Simultaneously, the second mounting boss 131 can be inserted into the second mounting groove 158, thereby achieving a detachable connection between the second liquid cooling plate 130 and the expansion plate 150. Preferably, there can be three first mounting bosses 111 and three second mounting bosses 131. The three first mounting bosses 111 are elongated and evenly distributed on the surface of the first liquid cooling plate 110, and the three second mounting bosses 131 are elongated and evenly distributed on the surface of the second liquid cooling plate 130. Correspondingly, there can also be three first mounting grooves 157 and three second mounting grooves 158, thus achieving a stable connection.

[0044] Furthermore, the first mounting groove 157 and the second mounting groove 158 are respectively disposed within the first deformation protrusion 155 and the second deformation protrusion 156. Specifically, the first mounting groove 157 corresponds to the first deformation protrusion 155, and the second mounting groove 158 corresponds to the second deformation protrusion 156. Preferably, the depth of the first mounting groove 157 can be greater than the thickness of the first deformation plate 151, and the depth of the second mounting groove 158 can be greater than the thickness of the second deformation plate 152. By using the first deformation protrusion 155 and the second deformation protrusion 156 as a bearing base, it is possible to avoid the first mounting groove 157 and the second mounting groove 158 penetrating through the first deformation plate 151 and the second deformation plate 152, thereby ensuring the structural strength of the first deformation plate 151 and the second deformation plate 152.

[0045] See Figures 5 to 7This utility model embodiment also provides a battery pack 200, including a housing 210, multiple battery cells 220, and the aforementioned liquid cooling plate assembly 100. The multiple battery cells 220 are disposed within the housing 210, and the liquid cooling plate assembly 100 is disposed between two adjacent battery cells 220. The liquid cooling plate assembly 100 includes a first liquid cooling plate 110, a second liquid cooling plate 130, and an absorption expansion plate 150. The first liquid cooling plate 110 and the second liquid cooling plate 130 are respectively attached to opposite side surfaces of the absorption expansion plate 150. The absorption expansion plate 150 is configured to deform and adjust the distance between the first liquid cooling plate 110 and the second liquid cooling plate 130 when the first liquid cooling plate 110 and / or the second liquid cooling plate 130 are subjected to external force. Furthermore, the first liquid cooling plate 110 and the second liquid cooling plate 130 are respectively attached to the side walls of two adjacent battery cells 220.

[0046] It should be noted that the first liquid cooling plate 110 and the second liquid cooling plate 130 are respectively attached to the surface of the larger sidewall of the two adjacent battery cells 220, thereby realizing heat exchange treatment on the large surface of the battery cell 220.

[0047] In some embodiments, the bottom wall of the housing 210 is provided with a support platform 230. The support platform 230 is provided with a first support groove 231 and a second support groove 232 at intervals on the side facing the battery cell 220. A support surface 233 is formed between the first support groove 231 and the second support groove 232. The first liquid cooling plate 110 is correspondingly assembled in the first support groove 231, the second liquid cooling plate 130 is correspondingly assembled in the second support groove 232, and the expansion absorption plate 150 is correspondingly placed on the support surface 233. Specifically, the support platform 230 protrudes from the bottom wall of the housing 210, and the surface of the support platform 230 is provided with a first support groove 231 and a second support groove 232 at intervals. The first support groove 231 and the second support groove 232 are located on the two side edges of the support platform 230, and a support surface 233 can be formed between them. Thus, the first liquid cooling plate 110, the second liquid cooling plate 130 and the expansion plate 150 are supported by the first support groove 231, the second support groove 232 and the support surface 233, respectively.

[0048] In an optional embodiment, a first thermally conductive adhesive layer 250 is disposed between the first liquid cooling plate 110 and the sidewall of the battery cell 220, and a second thermally conductive adhesive layer 270 is disposed between the second liquid cooling plate 130 and the sidewall of the battery cell 220. Specifically, thermally conductive adhesive is filled between the first liquid cooling plate 110, the second liquid cooling plate 130, and the battery cell 220, so that the heat generated by the battery cell 220 during operation can be exchanged away in a timely manner through the liquid cooling plate.

[0049] In summary, the liquid cooling plate assembly 100 provided in this embodiment of the invention has a first liquid cooling plate 110 and a second liquid cooling plate 130 respectively attached to the two side surfaces of an expansion-absorbing plate 150. The expansion-absorbing plate 150 can deform and adjust the distance between the first liquid cooling plate 110 and the second liquid cooling plate 130 when subjected to external pressure, thereby absorbing the expansion force of the battery cell 220. Compared to the prior art, this embodiment of the invention, by adding the expansion-absorbing plate 150 to absorb the expansion force of the battery cell 220, can reduce the risk of damage from compression while maintaining the liquid cooling effect, thus improving the service life of the liquid cooling plate.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid cold plate assembly, comprising: It includes a first liquid cooling plate (110), a second liquid cooling plate (130), and an absorption expansion plate (150). The first liquid cooling plate (110) and the second liquid cooling plate (130) are respectively attached to opposite side surfaces of the absorption expansion plate (150). The absorption expansion plate (150) is configured to deform and adjust the distance between the first liquid cooling plate (110) and the second liquid cooling plate (130) when the first liquid cooling plate (110) and / or the second liquid cooling plate (130) are subjected to external force.

2. The liquid cold plate assembly of claim 1, wherein, The absorption expansion plate (150) includes a first deformation plate (151), a second deformation plate (152), and a connecting plate (153). The first deformation plate (151) and the second deformation plate (152) are arranged at intervals relative to each other. The first deformation plate (151) is attached to the side of the first liquid cooling plate (110) facing the second liquid cooling plate (130), and the second deformation plate (152) is attached to the side of the second liquid cooling plate (130) facing the first liquid cooling plate (110). The connecting plate (153) is respectively connected between the two ends of the first deformation plate (151) and the second deformation plate (152), so that the first deformation plate (151), the second deformation plate (152), and the two connecting plates (153) are connected end to end to form a deformation cavity (154).

3. The liquid-cooled plate assembly according to claim 2, characterized in that, The first deformation plate (151) has a first deformation protrusion (155) on the side surface away from the first liquid cooling plate (110), and the second deformation plate (152) has a second deformation protrusion (156) on the side surface away from the second liquid cooling plate (130). The deformation cavity (154) is located between the first deformation protrusion (155) and the second deformation protrusion (156).

4. The liquid-cooled plate assembly according to claim 3, characterized in that, The first deformation protrusion (155) and the second deformation protrusion (156) are misaligned.

5. The liquid-cooled plate assembly according to claim 3, characterized in that, Both the first deformation protrusion (155) and the second deformation protrusion (156) are semi-cylindrical bosses.

6. The liquid-cooled plate assembly according to claim 3, characterized in that, The height H of the first deformation protrusion (155) relative to the first deformation plate (151) is less than half the distance L between the first deformation plate (151) and the second deformation plate (152); and / or, The protrusion height H of the second deformation protrusion (156) relative to the second deformation plate (152) is less than half the distance L between the first deformation plate (151) and the second deformation plate (152).

7. The liquid-cooled plate assembly according to claim 3, characterized in that, The absorption expansion plate (150) has a first mounting groove (157) and a second mounting groove (158) respectively on its opposite two side surfaces. The first liquid cooling plate body (110) has a first mounting boss (111) on its side surface near the second liquid cooling plate body (130). The first mounting boss (111) is correspondingly mounted in the first mounting groove (157) so that the first liquid cooling plate body (110) is fastened to the absorption expansion plate (150). The second liquid cooling plate body (130) has a second mounting boss (131) on its side surface near the first liquid cooling plate body (110). The second mounting boss (131) is correspondingly mounted in the second mounting groove (158) so that the second liquid cooling plate body (130) is fastened to the absorption expansion plate (150). The first assembly groove (157) and the second assembly groove (158) are respectively disposed in the first deformation protrusion (155) and the second deformation protrusion (156).

8. A battery pack, characterized in that, The device includes a housing (210), a plurality of battery cells (220), and a liquid cooling plate assembly (100) as described in any one of claims 1-7. The plurality of battery cells (220) are disposed within the housing (210), and the liquid cooling plate assembly (100) is disposed between two adjacent battery cells (220). The first liquid cooling plate (110) and the second liquid cooling plate (130) are respectively attached to the sidewalls of two adjacent battery cells (220).

9. The battery pack according to claim 8, characterized in that, The bottom wall of the housing (210) is provided with a support platform (230). The support platform (230) is provided with a first support groove (231) and a second support groove (232) at intervals on the side facing the battery cell (220). A support platform (233) is formed between the first support groove (231) and the second support groove (232). The first liquid cooling plate (110) is correspondingly assembled in the first support groove (231), and the second liquid cooling plate (130) is correspondingly assembled in the second support groove (232). The absorption expansion plate (150) is correspondingly placed on the support platform (233).

10. The battery pack according to claim 8, characterized in that, A first thermally conductive adhesive layer (250) is provided between the first liquid cooling plate (110) and the side wall of the battery cell (220), and a second thermally conductive adhesive layer (270) is provided between the second liquid cooling plate (130) and the side wall of the battery cell (220).

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