Cooling plate assembly and battery module

Abstract

The utility model provides a cooling plate assembly and a battery module, the cooling plate assembly comprises a cooling plate, and the cooling plate is used for controlling the temperature of the battery module; and the current collector is connected to the end part of the cooling plate in a bonding manner, and the cooling plate assembly is beneficial to improving the connection stability of the cooling plate and the current collector and the grouping efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a cooling plate assembly and a battery module. Background Art

[0002] The battery types used in new energy vehicles mainly include cylindrical batteries, square batteries and soft-pack batteries. Compared with the other two types of batteries, the 4690 large cylindrical battery has higher energy density, better safety and stability, and lower cost. It has received more recognition and attention from consumers and is expected to become the future development trend of batteries for new energy vehicles.

[0003] In the related art, large cylindrical battery packs have the problem of high heat generation. The double-sided liquid-cooled serpentine cooling plate assembly solution has excellent heat dissipation, making it the first choice for cylindrical battery packs. The weight reduction design of cylindrical battery packs has currently become a key issue for the use of cylindrical battery packs in new energy vehicles. The number of serpentine tubes in the double-sided liquid-cooled serpentine cooling plate assembly is doubled relative to the number of serpentine tubes in the single-sided serpentine cooling plate assembly. Therefore, the weight reduction design of the double-sided liquid-cooled serpentine cooling plate assembly has become a key issue for the application of the double-sided liquid-cooled serpentine cooling plate assembly in cylindrical battery packs. The serpentine cooling plate assembly includes a serpentine cooling plate and a current collector connected to both ends of the serpentine cooling plate. The serpentine cooling plate is preferably made of 3 series aluminum. The 3 series aluminum serpentine cooling plate and the current collector are welded. This connection method has low grouping efficiency and relatively poor reliability. Utility Model Content

[0004] The embodiments of the present utility model provide a cooling plate assembly and a battery module, which can improve the technical problems of low grouping efficiency and poor connection stability of the cooling plate assembly.

[0005] In a first aspect, an embodiment of the present invention provides a cooling plate assembly, the cooling plate assembly comprising:

[0006] A cooling plate, which is used to control the temperature of the battery module;

[0007] At least one current collector is connected to the end of the cooling plate by bonding.

[0008] In one embodiment, the current collector includes a plastic current collector, the current collector includes an open receiving cavity, and the current collector also includes at least one bonding portion arranged inside the receiving cavity, and the bonding portion is arranged near the open end of the receiving cavity; the cooling plate includes a connecting portion, and the connecting portion enters the interior of the receiving cavity through the opening of the receiving cavity and is bonded to the bonding portion by at least one adhesive.

[0009] In one embodiment, the bonding portion includes a first bonding portion and a second bonding portion, the second bonding portion is closer to the open end of the accommodating cavity relative to the first bonding portion, the adhesive includes a first adhesive and a second adhesive with different viscosities, the connecting portion includes a first part and a second part, the first bonding portion is bonded to the first part of the connecting portion through the first adhesive, and the second bonding portion is bonded to the second part of the connecting portion through the second adhesive, wherein the viscosity of the first adhesive is less than that of the second adhesive.

[0010] In one embodiment, a reinforcement structure is provided on the bonding portion or the connecting portion, and the reinforcement structure includes a groove or a protrusion, and the groove or the protrusion is used to increase the bonding area between the bonding portion and the connecting portion.

[0011] In one embodiment, the reinforcement structure includes a first groove and a second groove spaced apart in the bonding portion, the first groove being used to accommodate the first adhesive, and the second groove being used to accommodate the second adhesive.

[0012] In one embodiment, the current collector includes a first sub-shell and a second sub-shell connected to each other, the first sub-shell and the second sub-shell being bonded together by a third adhesive, a portion of the bonding portion being disposed on the first sub-shell, and another portion of the bonding portion being disposed on the second sub-shell.

[0013] In one embodiment, the cooling plate includes a base portion, the connecting portion is provided at one end of the base portion, a first flange is formed between the base portion and the connecting portion, and the first flange abuts against a side wall of the current collector.

[0014] In one embodiment, the current collector further includes a main body, the bonding portion is provided at one end of the main body, and a second flange is formed between an inner wall of the bonding portion and an inner wall of the main body.

[0015] In one embodiment, the current collector includes a first current collector and a second current collector, the first current collector is bonded to one end of the cooling plate, and the second current collector is bonded to the other end of the cooling plate;

[0016] The first current collector includes an inlet and an outlet, wherein the inlet is used for connection of a liquid inlet pipe, and the outlet is used for connection of a liquid outlet pipe.

[0017] In one embodiment, the first current collector includes a first shell having a closed end and an open end that are opposite to each other. A partition wall is further provided inside the first shell, and the partition wall is provided between the inlet and the outlet. The partition wall extends from the closed end to the open end and terminates at one side of the bonding portion.

[0018] In a second aspect, an embodiment of the present invention provides a battery module, which includes the aforementioned multiple cooling plate assemblies and multiple battery packs, and each of the cooling plate assemblies is arranged between adjacent battery packs.

[0019] Beneficial effects of the embodiments of the present utility model:

[0020] In the embodiment of the present invention, by bonding the current collector and the cooling plate, the grouping efficiency of the current collector and the cooling plate can be improved, and the connection stability between the current collector and the cooling plate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a three-dimensional schematic diagram of a cooling plate assembly provided in an embodiment of the present utility model;

[0023] Figure 2 is an exploded view of a cooling plate assembly provided in an embodiment of the present utility model;

[0024] Figure 3 yes Figure 2 A partial enlarged view of

[0025] Figure 4 This is a schematic cross-sectional view of the bonding of the connection portion of the current collector and the cooling plate provided by an embodiment of the present utility model;

[0026] Figure 5 This is a schematic diagram of a cross-sectional structure of a current collector provided by an embodiment of the present utility model;

[0027] Figure 6 This is another schematic cross-sectional structure diagram of the current collector provided in an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the split structure of the current collector provided in an embodiment of the present utility model;

[0029] Figure 8 is a three-dimensional diagram of a first current collector provided in an embodiment of the present utility model;

[0030] Figure 9 is a three-dimensional diagram of a second current collector provided in an embodiment of the present utility model;

[0031] Figure Number:

[0032] 100. Cooling plate assembly;

[0033] 10. Cooling plate; 11. Connecting portion; 111. First connecting portion; 112. Second connecting portion; 12. Flow channel; 13. Base portion; 14. First flange;

[0034] 20. Current collector; 21. First current collector; 211. First housing; 212. First closed end; 213. First open end; 22. Second current collector; 221. Second housing; 222. Second closed end; 223. Second open end; 23. Accommodating cavity; 24. Adhesive portion; 241. First adhesive portion; 242. Second adhesive portion; 243. Reinforcement structure; 2431. First groove; 2432. Second groove; 251. First sub-housing; 2511. First outer side surface; 252. Second sub-housing; 2521. Second outer side surface; 261. Inlet; 262. Outlet; 27. Partition wall; 28. Main body; 29. ​​Second flange; DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0036] One embodiment of the present invention provides a battery module, which includes a plurality of batteries arranged in a matrix, wherein the plurality of batteries are arranged side by side along a first direction to form a battery group, and the plurality of battery groups are arranged at intervals along a second direction to form a battery module, and the first direction and the second direction are arranged perpendicularly.

[0037] The batteries in this battery module are cylindrical batteries, which can be 4690 large cylindrical batteries, 4680 large cylindrical batteries, 46135 large cylindrical batteries, or 42300 large cylindrical batteries in related technologies. Multiple cylindrical batteries are connected in series, parallel, or mixed through connecting plates to ensure that the battery module has a suitable capacity.

[0038] An embodiment of the present invention further provides a battery pack, which includes a box body and at least one battery module arranged inside the box body. The battery pack can be used in new energy vehicles.

[0039] The battery module also includes a cooling device, which includes multiple liquid inlet plate assemblies, liquid inlet pipes and liquid outlet pipes. The cooling plate assembly 100 used for large cylindrical batteries preferably adopts a double-sided serpentine cooling plate assembly 100. The cooling plate assembly 100 includes a cooling plate 10 and at least one current collector 20 connected to the end of the cooling plate 10. The cooling plate 10 is arranged between two adjacent battery packs. The cooling plate 10 is arranged to have a serpentine corrugated structure that is adapted to the cylindrical side of the cylindrical battery, that is, the curvature of the outer surface of the cooling plate 10 is consistent with the curvature of the cylindrical side of the cylindrical battery, so that one side of the cooling plate 10 abuts against the outer side of a battery pack, and the other side of the cooling plate 10 abuts against the outer side of another adjacent battery pack.

[0040] like Figures 1 to 3 As shown, the cooling plate assembly 100 includes a cooling plate 10 and a first current collector 21 and a second current collector 22 respectively connected to both ends of the cooling plate 10 .

[0041] In the related art, large cylindrical battery packs have the problem of high heat generation. The double-sided liquid-cooled serpentine cooling plate assembly 100 solution has excellent heat dissipation, making it the first choice for cylindrical battery packs. The weight reduction design of cylindrical battery packs has currently become a key issue for the use of cylindrical battery packs in new energy vehicles. The number of serpentine tubes in the double-sided liquid-cooled serpentine cooling plate assembly 100 is doubled relative to the number of serpentine tubes in the single-sided serpentine cooling plate assembly 100. Therefore, the weight reduction design of the double-sided liquid-cooled serpentine cooling plate assembly 100 has become a key issue for the application of the double-sided liquid-cooled serpentine cooling plate assembly 100 in cylindrical battery packs. The serpentine cooling plate assembly 100 includes a serpentine cooling plate 10 and a current collector 20 connected to both ends of the serpentine cooling plate 10. The serpentine cooling plate 10 preferably uses 3 series aluminum. 3 series aluminum has good thermal conductivity. Therefore, the cooling plate 10 in the serpentine cooling plate assembly 100 uses 3 series aluminum and cannot be replaced. Therefore, only the current collector 20 connected to both ends of the serpentine cooling plate 10 can be designed to reduce weight.

[0042] Through research, the inventors have discovered that a current collector 20 made of plastic material can be significantly lighter than a current collector 20 made of 3-series aluminum. In one example, a single cooling plate assembly 100 made of 3-series aluminum to form the current collector 20 weighs 0.377 kg, while a single cooling plate assembly 100 made of plastic material to form the current collector 20 weighs 0.32 kg. The weight of a single serpentine cooling plate assembly 100 can be reduced by 15%, which is crucial for the weight reduction design of the cooling device inside the battery pack. Furthermore, the plastic current collector 20 can be set to different shapes and sizes by adjusting the mold for plastic molding, so that it can be designed to match the different spatial shapes inside the battery pack, which is beneficial to the miniaturization design of the battery pack.

[0043] Plastic materials suitable for preparing the above-mentioned current collector include PA materials. PA materials have corrosion resistance, high temperature resistance, and high strength.

[0044] When the current collector 20 and the cooling plate 10 are both made of aluminum, the current collector 20 and the cooling plate 10 are connected by welding. When the current collector 20 is made of plastic material, the current collector 20 and the cooling plate 10 are still connected by welding, which will result in poor connection reliability between the current collector 20 and the cooling plate 10 and low grouping efficiency. Therefore, the connection method between the plastic current collector 20 and the cooling plate 10 becomes the key to the improved design of the double-sided serpentine cooling plate assembly 100.

[0045] In the embodiment of the present application, the plastic current collector 20 and the cooling plate 10 are connected by bonding, thereby improving the stability of the connection between the current collector 20 and the cooling plate 10 and the grouping efficiency between the two components.

[0046] Further references Figures 2 to 6 As shown, Figure 2 The figure shows an exploded view of two current collectors 20 connected to the cooling plate 10 after being separated from the cooling plate 10. Figure 3 Shown Figure 2 A partial enlarged view of Figure 4 It is a cross-sectional view of the connection portion 11 of the cooling plate 10 and the current collector 20 after bonding. Figure 5 and Figure 6 Schematic diagrams of two cross-sectional structures of the current collector 20 .

[0047] The current collector 20 includes an open receiving cavity 23, and the current collector 20 also includes at least one bonding portion 24 arranged inside the receiving cavity 23, and the bonding portion 24 is arranged close to the open end of the receiving cavity 23; the cooling plate 10 includes a connecting portion 11, and the connecting portion 11 enters the interior of the receiving cavity 23 through the opening of the receiving cavity 23 and is bonded to the bonding portion 24 by at least one adhesive.

[0048] During the assembly process, adhesive is applied to the bonding portion 24 of the current collector 20, and the cooling plate 10 is inserted into the interior of the receiving cavity 23 through the opening of the receiving cavity 23. The connecting portion 11 of the cooling plate 10 is adhered to the bonding portion 24 of the current collector 20 by adhesive, which facilitates assembly.

[0049] In some embodiments provided by the present invention, Figure 5 As shown, at least one of the bonding parts 24 includes a first bonding part 241 and a second bonding part 242, and the second bonding part 242 is closer to the open end of the accommodating cavity 23 relative to the first bonding part 241. At least one of the adhesives includes a first adhesive and a second adhesive with different viscosities. The first bonding part 241 is bonded to the first part of the connecting part 11 through the first adhesive, and the second bonding part 242 is bonded to the second part of the connecting part 11 through the second adhesive, wherein the viscosity of the first adhesive is less than that of the second adhesive.

[0050] Among them, the low-viscosity first adhesive is used to ensure the sealing of the connection between the cooling plate 10 and the current collector 20, and prevent leakage at the connection between the current collector 20 and the cooling plate 10. The high-viscosity second adhesive is used to ensure the bonding strength between the cooling plate 10 and the current collector 20, and prevent the cooling plate 10 and the current collector 20 from loosening during collision and shaking of the battery pack.

[0051] For example, the first adhesive uses a UV adhesive with medium-to-high viscosity, good surface drying effect, good bonding effect on plastics, high temperature resistance, and good anti-aging effect. Suitable UV adhesives include 8651 adhesive. The second adhesive uses a PU adhesive with high-strength bonding performance, good flame retardant properties, and can be quickly cured at room temperature. Suitable PU adhesives include 6306 adhesive.

[0052] In order to further enhance the stability of the connection between the cooling plate 10 and the current collector 20, a reinforcing structure 243 is provided on the inner surface of the bonding portion 24 of the current collector 20 or the outer surface of the connecting portion 11 of the cooling plate 10. The reinforcing structure 243 may be a groove or a protrusion, thereby increasing the bonding area between the current collector 20 and the cooling plate 10. A groove is provided on the inner surface of the bonding portion 24 of the current collector 20, and a protrusion may be provided on the outer surface of the connecting portion 11 of the cooling plate 10 accordingly, and the protrusion may be embedded in the groove, or a protrusion is provided on the inner surface of the bonding portion 24 of the current collector 20, and a groove may be provided on the outer surface of the connecting portion 11 of the cooling plate 10 accordingly, and the protrusion may be embedded in the groove, thereby enhancing the connection strength between the current collector 20 and the cooling plate 10.

[0053] like Figure 6 As shown, the reinforcement structure 243 includes a first groove 2431 and a second groove 2432 spaced apart on the bonding portion 24 of the current collector 20 , wherein the first groove 2431 can be used to accommodate a first adhesive, and the second groove 2432 can be used to accommodate a second adhesive.

[0054] Further references Figure 7 As shown, in some embodiments, the current collector 20 includes a first sub-shell 251 and a second sub-shell 252 connected to each other. The first sub-shell 251 and the second sub-shell 252 are bonded together by a third adhesive. A portion of the bonding portion 24 is disposed on the first sub-shell 251, and another portion of the bonding portion 24 is disposed on the second sub-shell 252. The third adhesive can be made of the same type of adhesive material with the same performance as the second adhesive.

[0055] The first sub-housing 251 and the second sub-housing 252 can be separated along the thickness direction of the current collector 20. The first sub-housing 251 and the second sub-housing 252 are basically symmetrically arranged. A portion of the first bonding portion 241 is arranged on the first sub-housing 251, and another portion of the first bonding portion 241 is arranged on the second sub-housing 252. A portion of the second bonding portion 242 is arranged on the first sub-housing 251, and another portion of the second bonding portion 242 is arranged on the second sub-housing 252.

[0056] By providing the current collector 20 in a separate body, it is convenient to assemble the current collector 20 and the cooling plate 10. In an embodiment of the present invention, an assembly method for the cooling plate assembly 100 is also provided. The assembly method includes:

[0057] Apply a first adhesive and a second adhesive to the first adhesive portion 241 and the second adhesive portion 242 of the first sub-housing 251 of the current collector 20 , respectively;

[0058] Apply a first adhesive and a second adhesive to the first adhesive portion 241 and the second adhesive portion 242 of the second sub-housing 252 of the current collector 20 , respectively;

[0059] Applying a third adhesive on the first outer side 2511 of the first sub-housing 251;

[0060] Applying a third adhesive on the second outer side 2521 of the second sub-housing 252;

[0061] Bonding the first sub-housing 251 to a portion of the connecting portion 11 of the cooling plate 10;

[0062] The second outer side surface 2521 of the second partial housing 252 is bonded to the first outer side surface 2511 of the first partial housing 251 , and the second partial housing 252 is bonded to another portion of the connecting portion 11 of the cooling plate 10 .

[0063] The current collector 20 with the split structure is easier to assemble with the connecting portion 11 of the cooling plate 10 than the current collector 20 with the integrated structure, thereby improving the assembly efficiency.

[0064] Further references Figure 2 and Figure 3 As shown, the cooling plate 10 includes a base portion 13 , the connecting portion 11 is located at one end of the base portion 13 , a first flange 14 is formed between the base portion 13 and the connecting portion 11 , and the first flange 14 abuts against the side wall of the current collector 20 .

[0065] The above-mentioned first flange 14 structure is used for operational positioning. At the same time, the abutment between the first flange 14 and the third outer side surface of the current collector 20 can be used to further enhance the stability of the connection between the current collector 20 and the cooling plate 10. In a preferred embodiment, an adhesive can be further coated on the third outer side surface of the current collector 20 to bond the third outer side surface to the first flange 14.

[0066] Further references Figure 4 As shown, the current collector 20 further includes a main body 28 , the bonding portion 24 is disposed at one end of the main body 28 , and a second flange 29 is formed between the inner wall of the bonding portion 24 and the inner wall of the main body 28 .

[0067] The second flange 29 is provided to facilitate positioning of the bonding portion 24 , thereby facilitating application of adhesive to the bonding portion 24 and improving assembly efficiency.

[0068] like Figures 1 to 4As shown, at least one of the current collectors 20 includes a first current collector 21 and a second current collector 22, the first current collector 21 is bonded to one end of the cooling plate 10, and the second current collector 22 is bonded to the other end of the cooling plate 10; the first current collector 21 includes an inlet 261 and an outlet 262, the inlet 261 is used for access to a liquid inlet pipe, and the outlet 262 is used for access to a liquid outlet pipe.

[0069] A plurality of S-shaped extending flow channels 12 are provided in the inner cavity of the cooling plate 10, and partition walls are provided between adjacent flow channels 12. The inlet and outlet 262 of the flow channel 12 are both provided at the first end of the cooling plate 10. The coolant flowing out of the liquid inlet pipe enters the flow channel 12 through the inlet and flows to the second end of the cooling plate 10. The circulating liquid flows back to the first end from the second end of the cooling plate 10 and enters the liquid outlet pipe at the outlet 262. The provision of the above-mentioned U-shaped flow channel 12 is beneficial to improving the temperature uniformity of the cooling plate 10.

[0070] like Figure 8 As shown, the first current collector 21 includes a first shell 211 having a first closed end 212 and a first open end 213 opposite to each other. A partition wall 27 is further provided inside the first shell 211. The partition wall 27 is provided between the inlet 261 and the outlet 262. The partition wall 27 extends from the first closed end 212 to the first open end 213 and terminates at one side of the bonding portion 24. The partition wall 27 is provided to separate the coolant flowing out of the liquid inlet pipe from the return liquid flowing into the liquid outlet pipe.

[0071] A bonding portion 24 is provided in the inner cavity of the first shell 211 , and the bonding portion 24 is used to bond with the first connecting portion 111 of the cooling plate 10 .

[0072] like Figure 9 As shown, the second current collector 22 includes a second shell 221, which has a second closed end 212 and a second open end 223 arranged opposite to each other. A bonding portion 24 is provided in the inner cavity of the second shell 221, and the bonding portion 24 is used to bond with the second connecting portion 112 of the cooling plate 10.

[0073] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A cooling plate assembly, characterized in that: include: A cooling plate, the cooling plate is used to control the temperature of the battery module; At least one current collector is connected to the end of the cooling plate by bonding.

2. The cooling plate assembly according to claim 1, characterized in that The current collector includes a plastic current collector, the plastic current collector includes an open receiving cavity, and the plastic current collector also includes at least one bonding portion arranged inside the receiving cavity, and the bonding portion is arranged close to the open end of the receiving cavity; the cooling plate includes a connecting portion, and the connecting portion and the bonding portion are bonded by at least one adhesive.

3. The cooling plate assembly according to claim 2, characterized in that The bonding portion includes a first bonding portion and a second bonding portion, the second bonding portion is closer to the open end of the accommodating cavity than the first bonding portion, the adhesive includes a first adhesive and a second adhesive with different viscosities, the connecting portion includes a first part and a second part, the first bonding portion is bonded to the first part of the connecting portion through the first adhesive, and the second bonding portion is bonded to the second part of the connecting portion through the second adhesive, wherein the viscosity of the first adhesive is less than that of the second adhesive.

4. The cooling plate assembly according to claim 3, characterized in that A reinforcement structure is provided on the bonding portion or the connecting portion. The reinforcement structure includes a groove or a protrusion. The groove or the protrusion is used to increase the bonding area between the bonding portion and the connecting portion.

5. The cooling plate assembly according to claim 4, characterized in that The reinforcement structure includes a first groove and a second groove spaced apart at the bonding portion, the first groove being used to accommodate the first adhesive, and the second groove being used to accommodate the second adhesive.

6. The cooling plate assembly according to claim 2, characterized in that The current collector includes a first sub-shell and a second sub-shell connected to each other, wherein the first sub-shell and the second sub-shell are bonded to each other by a third adhesive, a portion of the bonding portion is disposed on the first sub-shell, and another portion of the bonding portion is disposed on the second sub-shell.

7. The cooling plate assembly according to any one of claims 2 to 6, characterized in that: The cooling plate includes a base portion, the connecting portion is arranged at one end of the base portion, a first flange is formed between the base portion and the connecting portion, and the first flange abuts against a side wall of the current collector.

8. The cooling plate assembly according to any one of claims 2 to 6, characterized in that: The current collector further includes a main body, the bonding part is disposed at one end of the main body, and a second flange is formed between an inner wall of the bonding part and an inner wall of the main body.

9. The cooling plate assembly according to any one of claims 2 to 6, characterized in that: The current collector includes a first current collector and a second current collector, the first current collector is bonded to one end of the cooling plate, and the second current collector is bonded to the other end of the cooling plate; The first current collector comprises an inlet and an outlet, wherein the inlet is used for a liquid inlet pipe to be connected, and the outlet is used for a liquid outlet pipe to be connected.

10. The cooling plate assembly according to claim 9, characterized in that The first current collector includes a first shell having a first closed end and a first open end that are opposite to each other. A partition wall is also provided inside the first shell, and the partition wall is provided between the inlet and the outlet. The partition wall extends from the first closed end to the first open end and terminates at one side of the bonding portion.

11. A battery module, characterized in that: The battery module comprises a plurality of cooling plate assemblies according to any one of claims 1 to 10 and a plurality of battery packs, and each of the cooling plate assemblies is arranged between adjacent battery packs.

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