Cooling device and battery module system

Abstract

The application provides a cooling device and a battery module system, the cooling device comprising a first plastic insulation structure and a second plastic insulation structure arranged oppositely and sealingly; the first plastic insulation structure and the second plastic insulation structure are both flexible; the first plastic insulation structure is provided with a first protruding structure integrally formed with the body of the first plastic insulation structure; the first protruding structure is protruded relative to the body in a direction away from the second plastic insulation structure; the inner side of the first protruding structure and the surface of the second plastic insulation structure form a cooling channel; one end of the first protruding structure is provided with a water inlet hole in communication with the cooling channel, and the other end is provided with a water outlet hole in communication with the cooling channel.

Description

Technical Field

[0001] This application relates to the field of battery heat dissipation technology, and in particular to a cooling device and battery module system. Background Technology

[0002] With the rapid development of the new energy industry, battery modules, as the main energy components in the industry, are key parts of new energy products and directly affect their main performance. Under different operating conditions, battery modules discharge at different rates and generate a large amount of heat at different rates. For safety reasons, heat dissipation measures are required for battery modules. Summary of the Invention

[0003] This application provides a cooling device and a battery module system.

[0004] In a first aspect, this application provides a cooling device, which includes a first plastic insulating structure and a second plastic insulating structure disposed opposite to and sealed together; both the first plastic insulating structure and the second plastic insulating structure are flexible;

[0005] The first malleable insulating structure has a first protrusion structure integrally formed with the body of the first malleable insulating structure; the first protrusion structure protrudes relative to the body in a direction away from the second malleable insulating structure; the space enclosed by the inner side of the first protrusion structure and the surface of the second malleable insulating structure is a cooling channel; one end of the first protrusion structure has a water inlet hole communicating with the cooling channel, and the other end has a water outlet hole communicating with the cooling channel.

[0006] In some embodiments, the first and / or second plastic insulating structures are aluminum-plastic films.

[0007] In some embodiments, the first protrusion structure is formed by stamping the body of the first malleable insulating structure.

[0008] In some embodiments, the water inlet and the water outlet are formed by punching holes in the first protrusion structure.

[0009] In some embodiments, the surface of the second malleable insulating structure facing the first malleable insulating structure is planar, and the cooling channel is the space enclosed by the inner side of the first protruding structure and the surface of the second malleable insulating structure facing the first malleable insulating structure; or...

[0010] The second malleable insulating structure has a second protruding structure symmetrically arranged with the first protruding structure. The second protruding structure is integrally formed with the body of the second malleable insulating structure. The portion of the body of the second malleable insulating structure corresponding to the first protruding structure protrudes in a direction away from the first malleable insulating structure to form the second protruding structure. The cooling channel is the space enclosed by the inner side of the first protruding structure and the inner side of the second protruding structure.

[0011] In some embodiments, the second protrusion structure is formed by stamping the body of the second malleable insulating structure.

[0012] In some embodiments, the water inlet is connected to a first water-cooling connector, which is connected to the water inlet via a hot-pressing process; the water outlet is connected to a second water-cooling connector, which is connected to the water outlet via a hot-pressing process.

[0013] In some embodiments, the sealing is performed by sealing the opposing first and second plastic insulating structures using a hot-pressing process.

[0014] Secondly, this application provides a battery module system, which includes a battery module and the aforementioned cooling device, the cooling device being used to dissipate heat from the battery module.

[0015] In some embodiments, the battery module includes a housing and a plurality of battery cells disposed within the housing; the cooling device is disposed between the inner surface of the housing and the battery cells, and the surface of the second malleable insulation structure in the cooling device facing away from the first malleable insulation structure is attached to the inner surface of the housing.

[0016] In some embodiments, the battery module includes a housing and a plurality of battery cells disposed within the housing; a cooling device is provided between each pair of adjacent battery cells, wherein the surface of a first protrusion on the first malleable insulation structure facing away from the second malleable insulation structure is attached to the surface of one of the two adjacent battery cells, and the surface of the second malleable insulation structure facing away from the first malleable insulation structure is attached to the surface of the other of the two adjacent battery cells.

[0017] In some embodiments, the battery module system includes a battery pack, the number of battery modules is multiple, the battery pack is composed of multiple battery modules, the battery pack also includes a housing, and the multiple battery modules are disposed in the housing;

[0018] The cooling device is disposed between the outer surface of the battery module and the housing, and the surface of the first protrusion on the first malleable insulating structure facing away from the second malleable insulating structure is attached to the outer surface of the battery module, and the surface of the second malleable insulating structure facing away from the first malleable insulating structure is attached to the surface of the housing.

[0019] The technical solutions for the cooling device and battery module system provided in this application have several advantages. First, the cooling device is made of a malleable insulating structure, which is lightweight, thus reducing the weight of the battery module, lowering the manufacturing cost of the cooling device, and increasing the energy density of the battery module system. Second, the malleable insulating structure has electrical insulation properties, eliminating the need for insulation treatment, which helps reduce the risk of leakage and manufacturing costs of the battery module, and improves the safety of the battery module. Furthermore, the malleable insulating structure has good plasticity, allowing it to fit the battery module and its cells, thereby absorbing assembly tolerances and eliminating the need for fillers or thermally conductive materials. The cooling device of this disclosure has a simple manufacturing process and low manufacturing cost.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed example embodiments described with reference to the accompanying drawings, in which:

[0022] Figure 1A This is a schematic diagram of a cooling device provided in an embodiment of this application;

[0023] Figure 1B This is a schematic diagram showing the disassembled structure of a cooling device provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of a first type of malleable insulating structure;

[0025] Figure 3 A schematic diagram of a second type of malleable insulating structure;

[0026] Figure 4 A schematic diagram of another type of second plastic insulating structure;

[0027] Figure 5This is a schematic diagram of the structure of a battery module system provided in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram illustrating an application scenario of a cooling device provided in an embodiment of this application;

[0029] Figure 7 This is a partial structural schematic diagram of another battery module system provided in an embodiment of this application;

[0030] Figure 8 A top view schematic diagram of a first plastic insulating structure in its initial state;

[0031] Figure 9 This is a top view of the first malleable insulating structure under deformation.

[0032] Figure 10 This is a schematic diagram showing the change in the gap between adjacent protruding structures before and after being squeezed by two adjacent battery cells;

[0033] Figure 11 This is a schematic diagram showing the shape change of the first protrusion structure before and after being squeezed by two adjacent battery cells. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this application, exemplary embodiments of this application are described below in conjunction with the accompanying drawings, including various details of the embodiments of this application to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0035] Where there is no conflict, the various embodiments of this application and the features thereof may be combined with each other.

[0036] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0037] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Terms such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.

[0038] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this application, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0039] Currently, the common heat dissipation method for battery modules in the new energy industry is to use aluminum liquid cooling plates (liquid cooling pipes) to cool the battery module. However, aluminum liquid cooling plates are relatively heavy, making the entire battery module heavy. In addition, aluminum liquid cooling plates are prone to leakage, which can cause safety problems and requires insulation treatment. Furthermore, aluminum liquid cooling plates are difficult to form with fine dimensions and are not good at dimensional tolerance. Moreover, traditional aluminum liquid cooling plates usually need to be used in conjunction with thermally conductive materials, and assembly tolerance compensation and filling of gaps are required when assembling them with battery modules, which increases manufacturing costs.

[0040] Figure 1A This is a schematic diagram of a cooling device provided in an embodiment of this application. Figure 1B This is a schematic diagram of the disassembled structure of a cooling device provided in an embodiment of this application. The embodiment of this application provides a cooling device applied to a battery module. The cooling device is used to dissipate heat from the battery module, so as to timely remove the heat generated during the operation of the battery module, ensure the normal operation of the entire battery module, and extend the service life of the battery module.

[0041] Reference Figure 1A and Figure 1B The cooling device 10 includes a first plastic insulating structure 11 and a second plastic insulating structure 12 that are disposed opposite to and sealed together, both of which are flexible.

[0042] The first malleable insulating structure 11 has a first protrusion structure 111 integrally formed with the body of the first malleable insulating structure 11; the first protrusion structure 111 protrudes relative to the body of the first malleable insulating structure 11 in the direction away from the second malleable insulating structure 12; the space enclosed by the inner side of the first protrusion structure 111 and the surface of the second malleable insulating structure 12 is a cooling channel; one end of the first protrusion structure 111 has a water inlet hole 112 communicating with the cooling channel, and the other end has a water outlet hole 113 communicating with the cooling channel.

[0043] The principle of cooling device 10 for heat dissipation of battery module is as follows: the coolant output from cold source (not shown in the figure) enters the cooling channel through the water inlet 112 of cooling device 10, absorbs the heat generated during the operation of battery module, and then flows out through water outlet 113 to release heat, thus completing the cooling and heat dissipation of battery module.

[0044] In the technical solution of the cooling device provided in this embodiment, on the one hand, the cooling device is made of a malleable insulating structure. The malleable insulating structure is lightweight, which helps to reduce the weight of the battery module, reduce the manufacturing cost of the cooling device, and improve the energy density of the battery module system. On the other hand, the malleable insulating structure has electrical insulation properties, eliminating the need for insulation treatment, which helps to reduce the leakage risk and manufacturing cost of the battery module and improve the safety of the battery module. In addition, the malleable insulating structure has good plasticity, which can fit the battery module and the battery cell arrangement, thereby facilitating the absorption of assembly tolerances of the battery module and eliminating the need for the use of sealant or thermally conductive materials. The cooling device of this embodiment has a simple manufacturing process and low manufacturing cost.

[0045] In some embodiments, the first malleable insulating structure 11 and / or the second malleable insulating structure 12 are aluminum-plastic films, which have extremely high barrier properties, good cold stamping formability, puncture resistance, electrolyte stability, and electrical insulation.

[0046] In some embodiments, the first protrusion structure 111 is formed by stamping the body of the first plastic insulating structure 11. Stamping is a forming process method that uses a press and a die to apply external force to sheet metal, strip, tube and profile, etc., to cause plastic deformation or separation, thereby obtaining a workpiece (stamped part) of the required shape and size.

[0047] In some embodiments, the water inlet hole 112 and the water outlet hole 113 are formed by punching the first protrusion structure 111. Punching refers to a processing method that creates various patterns on materials such as steel plates, leather, cloth, and wood to meet different needs.

[0048] Figure 2Exemplary front and side views of a first malleable insulating structure are shown, as in embodiments of this disclosure, such as Figure 2 As shown, a portion of the body of the first malleable insulating structure 11 is stamped using a stamping process, so that the portion protrudes from the surface of the first malleable insulating structure 11 facing away from the second malleable insulating structure 12, thereby forming a first protruding structure 111 of the desired shape. Correspondingly, the portion is recessed from the surface of the first malleable insulating structure 11 facing the second malleable insulating structure 12.

[0049] Figure 3 Exemplary front and side views of a second malleable insulating structure are shown, in some embodiments, with reference to Figure 1B and Figure 3 The surface of the second malleable insulating structure 12 facing the first malleable insulating structure 11 is flat, and the cooling channel is the space enclosed by the inner side of the first protruding structure 111 and the surface of the second malleable insulating structure 12 facing the first malleable insulating structure 11.

[0050] Figure 4 Exemplary front and side views of another second malleable insulation structure are shown, in some embodiments, with reference to Figure 1B and Figure 4 The second malleable insulating structure 12 has a second protruding structure 121 symmetrically arranged with the first protruding structure 111. The second protruding structure 121 is integrally formed with the body of the second malleable insulating structure 12. The portion of the body of the second malleable insulating structure 12 corresponding to the first protruding structure 111 protrudes along the direction away from the first malleable insulating structure 11, forming the second protruding structure 121. The cooling channel is the space enclosed by the inner side of the first protruding structure 111 and the inner side of the second protruding structure 121.

[0051] In some embodiments, the second protrusion structure 121 is formed by stamping the body of the second malleable insulating structure 12.

[0052] In some embodiments, such as Figure 1A and Figure 1B As shown, a first water-cooling connector 13 is connected to the water inlet 112. The first water-cooling connector 13 is connected to the water inlet 112 via a hot-pressing process. The first water-cooling connector 13 can be used to connect to the outlet of a cold source, and the coolant output from the cold source enters the water inlet 112 through the first water-cooling connector 13. This embodiment of the application does not impose special restrictions on the connection process between the first water-cooling connector 13 and the water inlet 112; it only requires that the connection be installed and formed correctly.

[0053] In some embodiments, such as Figure 1A and Figure 1BAs shown, a second water-cooling connector 14 is connected to the water outlet 113. The second water-cooling connector 14 is connected to the water outlet 113 via a hot-pressing process. The second water-cooling connector 14 can be connected to the inlet of a cold source. The coolant that has absorbed heat and flows out of the water outlet can flow back to the cold source through the second water-cooling connector 14 for cooling treatment, thereby achieving the reuse of the coolant. This embodiment of the application does not impose special restrictions on the connection process between the second water-cooling connector 14 and the water outlet 113; it only requires installation and forming.

[0054] In some embodiments, the sealing arrangement refers to sealing the oppositely disposed first malleable insulating structure 11 and second malleable insulating structure 12 through a hot-pressing process. The hot-pressing process effectively ensures good sealing of the cooling device and prevents cracking. This application does not impose special limitations on the sealing process of the first malleable insulating structure 11 and the second malleable insulating structure 12; any process that allows for sealing installation and molding is acceptable. For example, a PP hot-pressing process can be used.

[0055] Figure 5 This is a partial structural diagram of a battery module system provided in an embodiment of this application, as shown below. Figure 5 As shown, the battery module system 50 includes a battery module 51 and a cooling device 52. The cooling device 52 includes the cooling device provided in the above embodiment. The battery module 51 includes a housing 511 and a plurality of battery cells 512 disposed in the housing 511. The cooling device 52 is used to dissipate heat from the battery module 51.

[0056] In some embodiments, such as Figure 5 As shown, the cooling device 52 is disposed between the inner surface of the housing 511 and the battery cell 512, and the surface of the second plastic insulating structure in the cooling device 52 facing away from the first plastic insulating structure is in contact with the inner surface of the housing 511.

[0057] In some embodiments, the cooling device 52 is made of a malleable insulating structure and has good malleability. Therefore, the shape of the cooling device 52 can be changed according to the shape of the battery module 51 to adapt to the shape of the battery module 51, so that the cooling device 52 can fit well with the battery module 51. When there is a groove or protrusion in the housing 511 of the module 51, the first malleable insulating structure and the second malleable insulating structure in the cooling device 52 can be stamped with grooves or protrusions of corresponding shapes according to the groove or protrusion to adapt to the shape of the housing in the battery module 51, so that the cooling device 52 can fit well with the battery module 51.

[0058] Figure 6 This is a schematic diagram illustrating an application scenario of a cooling device provided in an embodiment of this application, such as... Figure 6As shown, the inner surface of the housing 511 in the battery module 51 has multiple spaced grooves. The corresponding multiple spaced grooves are formed by stamping on the first plastic insulating structure 11 in the cooling device 52 at the corresponding positions. Correspondingly, the corresponding multiple spaced grooves are formed on the second plastic insulating structure 12 at the corresponding positions. Then, the cooling device 52 is attached to the housing 511 of the battery module 51 at the corresponding positions.

[0059] Figure 7 This is a partial structural diagram of another battery module system provided in an embodiment of this application, as shown below. Figure 7 As shown, in some embodiments, in the battery module system, a cooling device 52 is provided between every two adjacent cells 512 in the battery module. The surface of the first protrusion on the first plastic insulating structure of the cooling device 52 facing away from the second plastic insulating structure is attached to the surface of one of the two adjacent cells 512, and the surface of the second plastic insulating structure facing away from the first plastic insulating structure is attached to the surface of the other of the two adjacent cells 512.

[0060] The cooling device 52 is made of a plastic insulating structure and has good plasticity. Therefore, when the cooling device 52 is placed between two adjacent cells 512, the two adjacent cells 512 compress the cooling device 52, causing the shape of the first protrusion structure on the first plastic insulating structure to change. Figure 8 This diagram shows a top view of a first malleable insulating structure in its initial state. Figure 9 This is a top view of the first ductile insulating structure under deformation, as shown below. Figure 7 and Figure 8 As shown, the shape of the first protrusion 111 on the first malleable insulating structure 11 is constructed as a loop. Before being squeezed by two adjacent cells 512 (initial state), there is a gap between adjacent protrusions in the loop-shaped first protrusion 111; as Figure 7 and Figure 9 As shown, after being squeezed and deformed by two adjacent cells 512 (deformed state), the adjacent protrusions in the first protrusion structure 111 of the loop shape are in contact with each other and balanced, forming a plane-like contact surface with the cell 512. This helps to make the contact surface between the cell 512 and the cooling device 52 uniformly stressed, improving the cycle life and safety of the cell 512. At the same time, the close contact between the cooling device 52 and the cell 512 can remove the heat generated by the cell 512 during system operation, so that the cell 512 maintains a constant temperature.

[0061] Figure 10 This shows the change in the gap between adjacent protrusions before and after being squeezed by two adjacent battery cells. Figure 11 The shape change of the first protrusion structure before and after being squeezed by two adjacent cells is shown, such as Figure 7 and Figure 10 As shown, before being squeezed by two adjacent cells 512 (initial state), there is a gap between adjacent protrusions in the loop-shaped first protrusion structure 111. After being squeezed and deformed by the two adjacent cells 512 (deformation state), the gap between adjacent protrusions in the loop-shaped first protrusion structure 111 becomes smaller, and adjacent protrusions in the loop-shaped first protrusion structure 111 come into contact with each other in equilibrium; as Figure 7 and Figure 11 As shown, before being squeezed by two adjacent cells 512 (initial state), the cross-sectional shape of the first protrusion structure 111 is trapezoidal, and correspondingly, the shape of the cooling channel inside the first protrusion structure 111 is trapezoidal. After being squeezed and deformed by two adjacent cells 512 (deformation state), the cross-sectional shape of the first protrusion structure 111 is elliptical, and correspondingly, the shape of the cooling channel inside the first protrusion structure 111 is elliptical. The contact area between the first protrusion structure 111 and the cell 512 increases.

[0062] It should be noted that the embodiments of this application do not impose special restrictions on the shape of the first protrusion structure 111 and the shape of the cooling channel inside the first protrusion structure 111. The shape of the first protrusion structure 111 can be a loop shape or other shapes. In the initial state, the shape of the cooling channel inside the first protrusion structure 111 can be a trapezoid or other shapes.

[0063] In some embodiments, the battery module system includes a battery pack (PACK), which comprises multiple battery modules. The battery pack also includes a housing in which the multiple battery modules are disposed.

[0064] In some embodiments, a cooling device is disposed between the outer surface of the battery module and the housing, and the surface of the first protrusion on the first malleable insulating structure of the cooling device facing away from the second malleable insulating structure is attached to the outer surface of the battery module, and the surface of the second malleable insulating structure facing away from the first malleable insulating structure is attached to the surface of the housing.

[0065] In some embodiments, a cooling device is disposed between two adjacent battery modules in a battery pack; wherein, between two adjacent battery modules, the surface of a first protrusion on a first malleable insulating structure facing away from the second malleable insulating structure is attached to the outer surface of one of the two adjacent battery modules, and the surface of the second malleable insulating structure facing away from the first malleable insulating structure is attached to the outer surface of the other battery module.

[0066] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and the specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cooling device, characterized in that, The cooling device includes a first plastic insulating structure and a second plastic insulating structure that are disposed opposite to and sealed together; both the first plastic insulating structure and the second plastic insulating structure are flexible. The first malleable insulating structure has a first protrusion structure integrally formed with the body of the first malleable insulating structure; the first protrusion structure protrudes relative to the body in a direction away from the second malleable insulating structure; the space enclosed by the inner side of the first protrusion structure and the surface of the second malleable insulating structure is a cooling channel; one end of the first protrusion structure has a water inlet hole communicating with the cooling channel, and the other end has a water outlet hole communicating with the cooling channel. The first and / or second plastic insulating structures are aluminum-plastic films; The first protruding structure is formed by stamping the body of the first malleable insulating structure; Before the cooling device is squeezed by the battery cell, the cross-sectional shape of the first protrusion structure is trapezoidal; after the cooling device is squeezed by the battery cell, the cross-sectional shape of the first protrusion structure is elliptical; after the cooling device is squeezed by the battery cell, the contact area between the first protrusion structure and the battery cell is greater than the contact area between the first protrusion structure and the battery cell before the cooling device is squeezed by the battery cell.

2. The cooling device according to claim 1, characterized in that, The water inlet and the water outlet are formed by punching holes in the first protruding structure.

3. The cooling device according to claim 1, characterized in that, The surface of the second malleable insulating structure facing the first malleable insulating structure is planar, and the cooling channel is the space enclosed by the inner side of the first protruding structure and the surface of the second malleable insulating structure facing the first malleable insulating structure; or... The second malleable insulating structure has a second protruding structure symmetrically arranged with the first protruding structure, and the second protruding structure is integrally formed with the body of the second malleable insulating structure; The portion of the second malleable insulating structure corresponding to the first protruding structure protrudes in a direction away from the first malleable insulating structure to form the second protruding structure; the cooling channel is the space enclosed by the inner side of the first protruding structure and the inner side of the second protruding structure.

4. The cooling device according to claim 3, characterized in that, The second protruding structure is formed by stamping the body of the second malleable insulating structure.

5. The cooling device according to claim 1, characterized in that, The water inlet is connected to a first water-cooling connector, which is connected to the water inlet via a hot-pressing process. The water outlet is connected to a second water-cooling connector, which is connected to the water outlet via a hot-pressing process.

6. The cooling device according to claim 1, characterized in that, The sealing is achieved by sealing the first and second plastic insulating structures, which are positioned opposite each other, through a hot-pressing process.

7. A battery module system, characterized in that, It includes a battery module and a cooling device as described in any one of claims 1-6, the cooling device being used to dissipate heat from the battery module.

8. The battery module system according to claim 7, characterized in that, The battery module includes a housing and multiple battery cells disposed within the housing; The cooling device is disposed between the inner surface of the housing and the battery cell, and the surface of the second malleable insulation structure facing away from the first malleable insulation structure in the cooling device is in contact with the inner surface of the housing.

9. The battery module system according to claim 7, characterized in that, The battery module includes a housing and multiple battery cells disposed within the housing; The cooling device is provided between each pair of adjacent cells. The surface of the first protrusion on the first plastic insulation structure facing away from the second plastic insulation structure is attached to the surface of one of the two adjacent cells. The surface of the second plastic insulation structure facing away from the first plastic insulation structure is attached to the surface of the other of the two adjacent cells.

10. The battery module system according to claim 7, characterized in that, The battery module system includes a battery pack, and the number of battery modules is multiple. The battery pack is composed of multiple battery modules. The battery pack also includes a housing, in which the multiple battery modules are disposed. The cooling device is disposed between the outer surface of the battery module and the housing, and the surface of the first protrusion on the first malleable insulating structure facing away from the second malleable insulating structure is attached to the outer surface of the battery module, and the surface of the second malleable insulating structure facing away from the first malleable insulating structure is attached to the surface of the housing.

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