Thermal insulation pad assembly and battery module

Abstract

The present invention relates to the field of battery technology, and specifically discloses a thermal insulation pad assembly and a battery module, wherein the thermal insulation pad assembly includes a first release film, a thermal insulation pad, and a second release film stacked in sequence along a first direction. The first easy-to-tear portion on the first release film and the second easy-to-tear portion on the second release film are arranged at two ends of the thermal insulation pad that are opposite to each other, and the size of the first easy-to-tear portion is larger than the size of the second easy-to-tear portion. As a result, the thermal insulation pad assembly will not be installed upside down during loading, and the film tearing equipment can accurately locate the position of the thermal insulation pad assembly so that the film tearing equipment can successfully separate the first release film and the second release film from the thermal insulation pad, avoiding unclean peeling of the release film and the failure of film peeling, which is conducive to realizing automated film tearing and assembly process with battery cells, reducing manual participation in operations, and greatly improving productivity. The present invention also provides a battery module, including the above-mentioned thermal insulation pad assembly.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a thermal insulation pad assembly and a battery module. Background Art

[0002] In a battery module, a thermal insulation pad is usually provided between two adjacent battery cells. The thermal insulation pad between two adjacent battery cells can block the heat transfer between the two adjacent battery cells, preventing one battery cell from affecting the adjacent battery cell when thermal runaway occurs. It has the effect of heat insulation and flame retardancy, reduces the risk of thermal runaway of the battery module, and also maintains the operating temperature of the battery module within an appropriate range, extending the service life. In addition, the thermal insulation pad also has the function of shockproof and absorbing the expansion of the battery cell, protecting the battery cell from the influence of external impact, and has a good buffering effect. The assembly between the thermal insulation pad and the battery cell can be done by gluing. The gluing process requires pre-sticking a glue layer and a release film on the surface of the thermal insulation pad. The release film on both sides of the thermal insulation pad needs to be torn off before mounting it with the battery cell.

[0003] The gluing process usually requires manual loading of the thermal insulation pad and tearing off the release film, and then the processed thermal insulation pad is attached to the battery cell through the mounting equipment, which results in slow production line efficiency and low production capacity. For this reason, some automated film-tearing equipment has emerged to cooperate with mounting equipment to reduce manual operation processes and speed up production. However, since the release films on both sides of the thermal insulation pad have the same size and shape, the existing film-tearing equipment cannot distinguish the front and back sides of the thermal insulation pad, and the positioning of the thermal insulation pad is inaccurate, resulting in unclean peeling and film-tearing failure, and there is a risk of failure. Summary of the invention

[0004] The object of the present invention is to provide an insulation pad assembly and a battery module, wherein the size designs of the release films on both sides of the insulation pad are different, so as to facilitate the cooperation with the film tearing equipment, improve the positioning accuracy of the film tearing equipment, and avoid the situation that the release film is not peeled off cleanly and the film peeling fails.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In one aspect, the present invention provides a thermal insulation pad assembly, comprising:

[0007] Insulation pads;

[0008] A first release film is arranged on one side of the thermal insulation pad along a first direction, and a first easy-tear portion is provided on the first release film;

[0009] A second release film is arranged on the other side of the thermal insulation pad along the first direction, and a second easy-tear portion is provided on the second release film. The second easy-tear portion and the first easy-tear portion are arranged at two ends of the thermal insulation pad that are opposite to each other, and the size of the first easy-tear portion is larger than that of the second easy-tear portion.

[0010] Optionally, the first tearable portion is connected to the side of the first release film along the second direction, the second tearable portion is connected to the side of the second release film along the second direction, and the size of the first tearable portion along the third direction is greater than that of the second tearable portion.

[0011] Optionally, a third easy-tear portion is provided on the first release film, the third easy-tear portion is connected to the side of the first release film along the second direction and is spaced apart from the first easy-tear portion, and a size of the first easy-tear portion along the third direction is larger than a size of the third easy-tear portion;

[0012] And / or, a fourth easy-tear portion is provided on the second release film, the fourth easy-tear portion is connected to the side of the second release film along the second direction and is spaced apart from the second easy-tear portion, and the sizes of the second easy-tear portion, the third easy-tear portion and the fourth easy-tear portion are equal along the third direction.

[0013] Optionally, along the second direction, the first easy-tear portion, the second easy-tear portion, the third easy-tear portion and the fourth easy-tear portion have the same size.

[0014] Optionally, along the third direction, the size of the first release film and the second release film is a1, and the value range of a1 is 190mm-200mm; the size of the first easy-tear portion is d, and the value range of d is 45mm-55mm; the size of the second easy-tear portion, the third easy-tear portion and the fourth easy-tear portion is c, and the value range of c is 20mm-30mm;

[0015] Along the second direction, the size of the first release film and the second release film are both b1, and the value range of b1 is 180mm-190mm; the size of the first easy-tear portion, the second easy-tear portion, the third easy-tear portion and the fourth easy-tear portion is e, and the value range of e is 15mm-25mm.

[0016] Optionally, along the third direction, the size of the thermal insulation pad is a2, and the value range of a2 is 185mm-195mm;

[0017] Along the second direction, the size of the thermal insulation pad is b2, and the value range of b2 is 160mm-170mm.

[0018] Optionally, an adhesive layer is provided between the thermal insulation pad and the first release film, and between the thermal insulation pad and the second release film. Along the first direction, the sum of the sizes of the thermal insulation pad and the adhesive layer is f, and the value range of f is 0.6mm-1.2mm.

[0019] Optionally, the material of the thermal insulation pad is silicone.

[0020] Optionally, the first release film and the second release film are dark in color, and the thermal insulation pad is light in color.

[0021] On the other hand, the present invention provides a battery module, comprising a plurality of battery cells and a plurality of thermal insulation pad assemblies according to any of the above-mentioned schemes, wherein the battery cells and the thermal insulation pad assemblies are alternately arranged along a first direction, and after the first release film, the second release film and the thermal insulation pad are separated, the two sides of the thermal insulation pad are respectively connected to one of the battery cells.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a thermal insulation pad assembly, comprising a first release film, a thermal insulation pad, and a second release film stacked in sequence along a first direction. The first release film is provided with a first easy-tear portion, the second release film is provided with a second easy-tear portion, the second easy-tear portion and the first easy-tear portion are arranged at two ends of the thermal insulation pad that are opposite to each other, and the size of the first easy-tear portion is greater than the size of the second easy-tear portion. By setting the sizes of the first easy-tear portion and the second easy-tear portion differently, the thermal insulation pad assembly will not be installed upside down during loading, and then the visual recognition mechanism of the film tearing device can accurately locate the position of the thermal insulation pad assembly, so that the mechanical claws of the film tearing device can accurately clamp the first easy-tear portion or the second easy-tear portion, and then successfully detach the first release film and the second release film from the thermal insulation pad, avoiding the situation of unclean peeling of the release film and the failure of film peeling, and is conducive to realizing the automated film tearing and assembly process with the battery cell, reducing manual participation in the operation, and greatly improving the yield.

[0024] The present invention also provides a battery module, including a plurality of battery cells, and a plurality of the above-mentioned thermal insulation pad assemblies, wherein the battery cells and the thermal insulation pad assemblies are alternately arranged along a first direction, and after the first release film, the second release film and the thermal insulation pad are separated, the two sides of the thermal insulation pad are respectively connected to a battery cell. By adopting the above-mentioned thermal insulation pad assembly, it is convenient to cooperate with the film tearing equipment, and the positioning accuracy of the film tearing equipment is improved. At the same time, manual operation is avoided, and an automated installation process is realized with a high yield. In addition, the thermal insulation pad in this embodiment is made of silicone material, which will not deform when the battery cell expands, and at the same time takes into account the functions of heat insulation, flame retardancy, shock absorption, and tolerance absorption. The battery module has high reliability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the thermal insulation pad assembly provided in an embodiment of the present invention;

[0026] Figure 2 A side view of a thermal insulation pad assembly provided in an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of a battery module provided in an embodiment of the present invention.

[0028] In the figure:

[0029] 10. Battery cell; 20. End plate; 30. Foam; 40. Cable tie; 50. Connecting bar;

[0030] 100, thermal insulation pad; 200, first release film; 210, first easy-to-tear portion; 220, third easy-to-tear portion; 300, second release film; 310, second easy-to-tear portion; 320, fourth easy-to-tear portion; 400, adhesive layer. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] like Figure 1 and Figure 2 As shown, this embodiment provides a thermal insulation pad assembly, which includes a thermal insulation pad 100, a first release film 200 and a second release film 300. The first release film 200, the thermal insulation pad 100 and the second release film 300 are stacked in sequence along a first direction. The first release film 200 is arranged on one side of the thermal insulation pad 100 along the first direction, and the second release film 300 is arranged on the other side of the thermal insulation pad 100 along the first direction. The first direction refers to the thickness direction of the thermal insulation pad 100, that is, Figure 2 The Z-axis direction shown in .

[0036] The first release film 200 is provided with a first easy-tear portion 210, and the second release film 300 is provided with a second easy-tear portion 310. The second easy-tear portion 310 and the first easy-tear portion 210 are arranged at two ends of the thermal insulation pad 100 that are away from each other, and the size of the first easy-tear portion 210 is larger than the size of the second easy-tear portion 310. Exemplarily, the first easy-tear portion 210 and the second easy-tear portion 310 are respectively arranged at two ends of the thermal insulation pad 100 along the second direction, and the size of the first easy-tear portion 210 along the third direction is larger than the size of the second easy-tear portion 310 along the third direction. The second direction refers to the width direction of the thermal insulation pad 100, that is, Figure 1 , Figure 2 The third direction refers to the length direction of the thermal insulation pad 100, that is, Figure 1 , Figure 2 The Y-axis direction is shown in . By setting the first easy-tear portion 210 of the first release film 200 and the second easy-tear portion 310 of the second release film 300 differently, the thermal insulation pad assembly will not be installed upside down during loading, and the visual recognition mechanism of the film tearing device can accurately locate the position of the thermal insulation pad assembly, so that the mechanical claws of the film tearing device can accurately clamp the first easy-tear portion 210 or the second easy-tear portion 310, and then successfully separate the first release film 200 and the second release film 300 from the thermal insulation pad 100, avoiding the situation of unclean release film peeling and film peeling failure, and facilitating the realization of automated film tearing and assembly process with the battery cell 10, reducing manual participation in operations, and greatly improving productivity.

[0037] As an optional technical solution, the first easy-tear portion 210 in this embodiment is connected to the side of the first release film 200 along the second direction, and the second easy-tear portion 310 is connected to the side of the second release film 300 along the second direction, and the first easy-tear portion 210 and the second easy-tear portion 310 are opposite. The size of the first easy-tear portion 210 along the third direction is greater than the size of the second easy-tear portion 310 along the third direction. Therefore, the visual recognition mechanism of the film tearing device can accurately locate the first easy-tear portion 210 and the second easy-tear portion 310, ensuring that the installation position of the thermal insulation pad 100 is correct, and the mechanical claws of the film tearing device can accurately locate and clamp the first easy-tear portion 210 or the second easy-tear portion 310.

[0038] Further, the first release film 200 is provided with a third easy-tear portion 220, which is connected to the side of the first release film 200 along the second direction and is spaced apart from the first easy-tear portion 210, and the size of the first easy-tear portion 210 along the third direction is greater than the size of the third easy-tear portion 220. The second release film 300 is provided with a fourth easy-tear portion 320, which is connected to the side of the second release film 300 along the second direction and is spaced apart from the second easy-tear portion 310, and the sizes of the second easy-tear portion 310, the third easy-tear portion 220 and the fourth easy-tear portion 320 are equal in the third direction. The sizes of the first easy-tear portion 210, the second easy-tear portion 310, the third easy-tear portion 220 and the fourth easy-tear portion 320 are equal in the second direction.

[0039] That is to say, only the size of the first tearable portion 210 along the third direction is different from the sizes of other tearable portions. Therefore, when the visual recognition mechanism of the film tearing equipment determines that the position of the first tearable portion 210 is correct, the positions of other tearable portions are also correct, and the installation direction of the thermal insulation pad assembly during loading is correct.

[0040] Optionally, the film-tearing device in this embodiment includes two groups of mechanical claws, one of which can accurately grasp the first easy-tear portion 210 and the third easy-tear portion 220 of the first release film 200 and peel the first release film 200 from the thermal insulation pad 100. Through the arrangement of the first easy-tear portion 210 and the third easy-tear portion 220, the first release film 200 can be clamped at both ends along the third direction, the mechanical claws apply force more evenly, and the film peeling is smooth. Then the other group of mechanical claws can accurately grasp the second easy-tear portion 310 and the fourth easy-tear portion 320 of the second release film 300 and peel the second release film 300 from the thermal insulation pad 100. Through the arrangement of the third easy-tear portion 220 and the fourth easy-tear portion 320, the second release film 300 can be clamped at both ends along the third direction, the mechanical claws apply force more evenly, and the film peeling is smooth.

[0041] As an optional solution, the first release film 200 and the second release film 300 in this embodiment are dark in color (for example, the first release film 200 and the second release film 300 are red antistatic films), and the thermal insulation pad 100 is light in color (for example, the thermal insulation pad 100 is white). When the visual recognition mechanism detects the thermal insulation pad assembly, it can identify the dark-colored first release film 200 and the second release film 300 as black, and the light-colored thermal insulation pad 100 as white, thereby distinguishing the first release film 200 and the second release film 300 from the thermal insulation pad 100, and assisting in determining whether the position of the thermal insulation pad 100 is accurately positioned, and can also determine whether the first release film 200 and the second release film 300 are successfully peeled off from the thermal insulation pad 100.

[0042] Furthermore, the material of the heat insulation pad 100 in this embodiment is organic silicon, the water absorption rate of which is less than 3%, the compression amount along the first direction is less than 5%, the insulation pressure resistance and flame retardancy are both good, which is conducive to ensuring the safety of the battery.

[0043] As an optional solution, the dimensions of the first release film 200 and the second release film 300 along the third direction are both a1, and the value range of a1 is 190mm-200mm. For example, the value of a1 can be 190mm, 192mm, 195mm, 198mm or 200mm, etc. The dimension of the first easy-tear portion 210 along the third direction is d, and the value range of d is 45mm-55mm. For example, the value of d can be 45mm, 50mm or 55mm, etc. The dimensions of the second easy-tear portion 310, the third easy-tear portion 220 and the fourth easy-tear portion 320 along the third direction are all c, and the value range of c is 20mm-30mm. For example, the value of c can be 20mm, 25mmmm or 30mm, etc.

[0044] The size of the first release film 200 and the second release film 300 along the second direction is b1, and the value range of b1 is 180mm-190mm. For example, the value of b1 can be 180mm, 186mm, 188 or 190mm. The size of the first easy-tear portion 210, the second easy-tear portion 310, the third easy-tear portion 220 and the fourth easy-tear portion 320 is e, and the value range of e is 15mm-25mm. For example, the value of e can be 15mm, 20mm or 25mm.

[0045] In this embodiment, the value of a1 is 198 mm, the value of b1 is 186 mm, the value of d is 50 mm, the value of c is 25 mm, and the value of e is 20 mm. At this time, the size of the first easy-tear portion 210 along the third direction is twice that of the second easy-tear portion 310, the third easy-tear portion 220, and the fourth easy-tear portion 320. The visual recognition mechanism can easily obtain the position of the thermal insulation pad assembly to ensure that the installation position of the thermal insulation pad assembly to the film tearing device is correct, so as to perform subsequent film tearing operations.

[0046] Further, the dimension of the thermal insulation pad 100 along the third direction is a2, a1≥a2, and the value range of a2 is 185mm-195mm. For example, the value of a2 can be 185mm, 190mm, 192mm or 195mm, etc. The dimension of the thermal insulation pad 100 along the second direction is b2, b1≥b2, and the value range of b2 is 160mm-170mm. For example, the value of b2 can be 160mm, 166mm or 170, etc.

[0047] In this embodiment, the value of a2 is 192 mm and the value of b2 is 166 mm. At this time, the contact area between the thermal insulation pad 100 and the battery cell 10 is about 0.032 m2.

[0048] See also Figure 2 , an adhesive layer 400 is provided between the thermal insulation pad 100 and the first release film 200, and between the thermal insulation pad 100 and the second release film 300. Along the first direction, the sum of the sizes of the thermal insulation pad 100 and the adhesive layer 400 is f, and the value range of f is 0.6mm-1.0mm. For example, the value of f can be 0.6mm, 0.8mm, 1.0mm or 1.2mm. In this embodiment, the value of f is 1.0mm as an example, and the size of the adhesive layer 400 along the first direction is 0.1mm. After the first release film 200 and the second release film 300 are successfully detached from the thermal insulation pad 100, the thermal insulation pad 100 is bonded to a battery cell 10 on both sides along the first direction. When the battery cell 10 expands and deforms to squeeze the thermal insulation pad 100, the squeezing force of the battery cell 10 on the thermal insulation pad 100 is F, F < 6000N, and the contact area between the thermal insulation pad 100 and the battery cell 10 is about 0.032m 2 , the thermal insulation pad 100 has no compression deformation.

[0049] This embodiment also provides a battery module, see Figure 3 The battery module includes a plurality of battery cells 10 and a plurality of the above-mentioned thermal insulation pad assemblies. The battery cells 10 and the thermal insulation pad assemblies are alternately arranged along the first direction. After the first release film 200 and the second release film 300 are separated from the thermal insulation pad 100, the two sides of the thermal insulation pad 100 are respectively connected to a battery cell 10. By adopting the thermal insulation pad assembly in this embodiment, it is convenient to cooperate with the film tearing equipment, and the positioning accuracy of the film tearing equipment is improved. At the same time, manual operation is avoided, and an automated installation process is realized with a high yield. In addition, the thermal insulation pad 100 in this embodiment is made of silicone material, which will not deform when the battery cell 10 expands. At the same time, it takes into account the functions of heat insulation, flame retardancy, shock absorption, and tolerance absorption. The battery module has high reliability and long service life.

[0050] Furthermore, the battery module in this embodiment also includes two end plates 20, a cable tie 40, a foam 30 and a connecting row 50. The two end plates 20 are respectively arranged at the two ends of all the battery cells 10 along the first direction. The foam 30 is sandwiched between the end plates 20 and the battery cells 10. The foam 30 can also play a role in heat insulation and absorb the expansion force of the battery cells 10. The cable tie 40 is wound around the outside of the end plate 20. The cable tie 40 and the end plate 20 are used to bundle a plurality of battery cells 10 and a plurality of thermal insulation pads 100 into a group to realize the assembly of the battery module. The positive and negative electrodes of the battery cells 10 are connected to the connecting row 50. The connecting row 50 is used to connect a plurality of battery cells 10 in series and / or in parallel, and the connecting row 50 is used to realize the conductive connection between the plurality of battery cells 10.

[0051] Since the thermal insulation pad 100 in this embodiment does not deform when the battery cell 10 expands, it can ensure that the distance between two adjacent battery cells 10 remains unchanged, there is no tolerance accumulation, and it is ensured that the connecting bar 50 and the battery cell 10 will not be subjected to tensile stress after welding. The connection strength between the connecting bar 50 and the battery cell 10 is relatively high, and the safety and reliability of the battery module after assembly are high.

[0052] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A thermal insulation pad assembly, characterized in that: include: Thermal insulation pad (100); A first release film (200), arranged on one side of the thermal insulation pad (100) along a first direction, wherein the first release film (200) is provided with a first easy-tear portion (210); A second release film (300) is arranged on the other side of the thermal insulation pad (100) along the first direction, and a second easy-tear portion (310) is provided on the second release film (300). The second easy-tear portion (310) and the first easy-tear portion (210) are arranged at two ends of the thermal insulation pad (100) that are opposite to each other, and the size of the first easy-tear portion (210) is larger than the size of the second easy-tear portion (310).

2. The thermal insulation pad assembly according to claim 1, characterized in that: The first easy-tear portion (210) is connected to the side of the first release film (200) along the second direction, the second easy-tear portion (310) is connected to the side of the second release film (300) along the second direction, and the size of the first easy-tear portion (210) along the third direction is larger than the size of the second easy-tear portion (310).

3. The thermal insulation pad assembly according to claim 2, characterized in that: A third easy-tear portion (220) is provided on the first release film (200), the third easy-tear portion (220) is connected to the side of the first release film (200) along the second direction and is spaced apart from the first easy-tear portion (210), and the size of the first easy-tear portion (210) along the third direction is larger than the size of the third easy-tear portion (220); And / or, a fourth easy-tear portion (320) is provided on the second release film (300), and the fourth easy-tear portion (320) is connected to the side of the second release film (300) along the second direction and is spaced apart from the second easy-tear portion (310), and the sizes of the second easy-tear portion (310), the third easy-tear portion (220) and the fourth easy-tear portion (320) are equal along the third direction.

4. The thermal insulation pad assembly according to claim 3, characterized in that: Along the second direction, the first easy-tear portion (210), the second easy-tear portion (310), the third easy-tear portion (220) and the fourth easy-tear portion (320) have the same size.

5. The thermal insulation pad assembly according to claim 4, characterized in that: Along the third direction, the size of the first release film (200) and the second release film (300) are both a1, and the value range of a1 is 190 mm-200 mm; the size of the first easy-tear portion (210) is d, and the value range of d is 45 mm-55 mm; the size of the second easy-tear portion (310), the third easy-tear portion (220) and the fourth easy-tear portion (320) are all c, and the value range of c is 20 mm-30 mm; Along the second direction, the size of the first release film (200) and the second release film (300) are both b1, and the value range of b1 is 180mm-190mm; the size of the first easy-tear portion (210), the second easy-tear portion (310), the third easy-tear portion (220) and the fourth easy-tear portion (320) is e, and the value range of e is 15mm-25mm.

6. The thermal insulation pad assembly according to claim 1, characterized in that: Along the third direction, the size of the thermal insulation pad (100) is a2, and the value range of a2 is 185 mm-195 mm; Along the second direction, the size of the thermal insulation pad (100) is b2, and the value range of b2 is 160 mm-170 mm.

7. The thermal insulation pad assembly according to claim 1, characterized in that: An adhesive layer (400) is provided between the thermal insulation pad (100) and the first release film (200), and between the thermal insulation pad (100) and the second release film (300). Along the first direction, the sum of the dimensions of the thermal insulation pad (100) and the adhesive layer (400) is f, and the value range of f is 0.6 mm-1.2 mm.

8. The thermal insulation pad assembly according to any one of claims 1 to 7, characterized in that: The material of the thermal insulation pad (100) is silicone.

9. The thermal insulation pad assembly according to any one of claims 1 to 7, characterized in that: The first release film (200) and the second release film (300) are dark in color, and the thermal insulation pad (100) is light in color.

10. A battery module, characterized in that: It comprises a plurality of battery cells (10) and a plurality of thermal insulation pad assemblies according to any one of claims 1 to 9, wherein the battery cells (10) and the thermal insulation pad assemblies are alternately arranged along a first direction, and after the first release film (200) and the second release film (300) are separated from the thermal insulation pad (100), the two sides of the thermal insulation pad (100) are respectively connected to one of the battery cells (10).

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