Protective film for module side heat conduction pad in battery box and heat conduction pad assembly

Abstract

The utility model relates to the technical field of battery box assembly, in particular to a protective film for a module side heat conduction pad in a battery box and a heat conduction pad assembly, the protective film comprises a coating part, the coating part is provided with a coating surface which is used for coating the side surface of the module side heat conduction pad so as to protect the module side heat conduction pad when a battery module enters the box, the end part of the coating part is connected with a force transmission part, the force transmission part is positioned on one side, opposite to the coating surface, of the coating part, the end part, far away from one end connected with the coating part, of the force transmission part is provided with a force application part protruding out of the coating part, and the force application part is used for removing the whole protective film from the module side heat conduction pad after the battery module is put into a box. The protective film can be smoothly taken out from a narrow space between the battery module and the heat-conducting pad, and meanwhile, the heat-conducting pad can be protected when the battery module is put into a box, so that the heat-conducting pad is not easy to damage due to collision of the battery module.

Description

Technical Field

[0001] The utility model relates to the technical field of battery box assembly, in particular to a protective film and a thermal pad assembly for a thermal pad on a module side in a battery box. Background Art

[0002] At present, some battery boxes are provided with a heat dissipation duct or a liquid cooling plate between two battery modules for cooling. The structure of the battery box provided with a heat dissipation duct can refer to a battery pack disclosed in the Chinese utility model patent with authorization announcement number CN220189748U, which includes a box body and multiple battery modules in the box body. The box body is a battery box body, and the battery modules are arranged in rows. A heat dissipation duct is provided between two adjacent rows of battery modules. The heat dissipation duct constitutes a heat dissipation structure. The heat dissipation duct is flat and hollow inside for cooling air flow to pass through. The heat dissipation duct is vertically arranged up and down. The height of the heat dissipation duct in the up and down direction matches the height of the battery module. The battery module is installed at the bottom of the box body, and the battery module is cooled by the heat dissipation duct.

[0003] In order to ensure good heat conduction between the sides of the battery module and the side walls of the heat dissipation duct, some battery boxes will also attach thermal pads to the heat dissipation duct, such as Figure 1 and Figure 2 As shown, the heat dissipation duct 3 of the battery box is respectively provided with a thermal pad 4 for corresponding to each part of the battery module 1. During the assembly of the battery box, after the heat dissipation duct 3 is installed on the battery box body 2, for the consideration of the operating space, the thermal pad 4 needs to be pasted on the heat dissipation duct 3 before the battery module 1 is put into the box. The thermal pad 4 is very soft. When pasting, a part of the thermal pad 4 is first pasted on one side of the heat dissipation duct 3, and then the other part is pasted around the other side of the heat dissipation duct 3. The shape of the thermal pad itself is finally achieved. Figure 2 The state shown. The operation of loading the battery module 1 into the battery box 2 is currently done manually, where the battery module 1 is placed from top to bottom into the side of the heat dissipation duct 3 in the battery box 2, and the battery module 1 is aligned with the side of the thermal pad 4. The thermal pad 4 is located on one side of the battery module 1 to form a module-side thermal pad, which can speed up the heat exchange efficiency of the module side. Since the distance between the heat dissipation duct 3 and the battery module 1 is usually very small, and the distance between the thermal pad 4 and the battery module 1 is also very small, the space for placing the battery module 1 in the battery box 2 is limited. During the manual operation of loading the battery module into the box, it is difficult for the operator to ensure that the battery module 1 is placed straight up and down, and the battery module 1 can easily touch the thermal pad 4. Since there are many sharp parts on the side of the battery module 1 and the surface friction coefficient of the thermal pad 4 is large, the thermal pad 4 can be easily damaged when the battery module 1 hits the thermal pad 4. Utility Model Content

[0004] The purpose of the utility model is to provide a protective film for the thermal pad on the module side of the battery box, so as to solve the problem that the thermal pad is easily damaged due to the battery module hitting the thermal pad when the battery module is put into the box; the purpose of the utility model is also to provide a thermal pad assembly to solve the above problem.

[0005] The technical solution of the protective film for the thermal pad on the module side of the battery box of the utility model is:

[0006] A protective film for a thermal pad on the module side in a battery box, the protective film comprising a covering portion, the covering portion having a covering surface for covering the side of the thermal pad on the module side to protect the thermal pad on the module side when the battery module is placed in the box, a force transmission portion connected to the end of the covering portion, the force transmission portion being located on the side of the covering portion facing away from the covering surface, a force applying portion protruding from the covering portion being provided at the end of the force transmission portion away from the end connected to the covering portion, the force applying portion being used to peel off the entire protective film from the thermal pad on the module side after the battery module is placed in the box.

[0007] Furthermore, the force transmission portion includes a lower portion connected to the covering portion and an upper portion connected to the force applying portion, and a width of the upper portion is smaller than a width of the lower portion.

[0008] Furthermore, the width of the upper portion is consistent with the width of the force-applying portion, and the width of the lower portion is consistent with the width of the covering portion.

[0009] Furthermore, the covering portion and the force transmission portion are integrally folded and connected.

[0010] Furthermore, the protective film has two relatively disposed covering parts, one end of the two covering parts close to the force-applying part is integrally connected, and the two covering parts are respectively used to cover the opposite side surfaces of the module-side thermal pad on the heat dissipation structure of the battery box.

[0011] The beneficial effects of the protective film of the thermal pad on the module side in the battery box of the utility model are as follows: the utility model pioneers a protective film for the thermal pad on the module side in the battery box, wherein the covering surface of the covering portion of the protective film can be covered on the side of the thermal pad on the module side to protect the thermal pad when the battery module is put into the box, and the force transmission portion and the force application portion on the side of the protective film facing away from the covering surface can be used to apply a pulling force to the force application portion of the protective film after the battery module is put into the box. The pulling force will act on the part of the covering portion of the protective film away from the force application portion through the force transmission portion, so that the covering portion attached to the thermal pad gradually separates from the thermal pad from the bottom to the top, thereby ensuring that the protective film is smoothly removed, and the protective film can be used to be smoothly removed in the narrow space between the battery module and the thermal pad, and at the same time, the thermal pad can be protected when the battery module is put into the box, and the thermal pad is not easily damaged due to the collision of the battery module.

[0012] The technical solution of the thermal pad assembly of the utility model is:

[0013] A thermal pad assembly includes a module-side thermal pad for being arranged in a battery box and a protective film for being arranged on the module-side thermal pad, the protective film including a covering portion, the covering portion having a covering surface for covering the side surface of the module-side thermal pad to protect the module-side thermal pad when the battery module is placed in the box, a force transmission portion is connected to the end of the covering portion, the force transmission portion is located on the side of the covering portion facing away from the covering surface, a force application portion protruding from the covering portion is provided at the end of the force transmission portion away from the end connected to the covering portion, and the force application portion is used to peel off the entire protective film from the module-side thermal pad after the battery module is placed in the box.

[0014] Furthermore, the force transmission portion includes a lower portion connected to the covering portion and an upper portion connected to the force applying portion, and a width of the upper portion is smaller than a width of the lower portion.

[0015] Furthermore, the width of the upper portion is consistent with the width of the force-applying portion, and the width of the lower portion is consistent with the width of the covering portion.

[0016] Furthermore, the covering portion and the force transmission portion are integrally folded and connected.

[0017] Furthermore, the protective film has two relatively disposed covering parts, one end of the two covering parts close to the force-applying part is integrally connected, and the two covering parts are respectively used to cover the opposite side surfaces of the module-side thermal pad on the heat dissipation structure of the battery box.

[0018] The beneficial effects of the thermal pad assembly of the present invention are as follows: the present invention pioneers a thermal pad assembly with a protective film, wherein the covering surface of the covering portion of the protective film can be covered on the side of the thermal pad on the module side to protect the thermal pad when the battery module is put into a box, and the force transmission portion and the force application portion on the side of the protective film facing away from the covering surface can be used to apply a pulling force to the force application portion of the protective film after the battery module is put into the box. The pulling force will act on the part of the covering portion of the protective film away from the force application portion through the force transmission portion, so that the covering portion attached to the thermal pad gradually separates from the thermal pad from the bottom to the top, thereby ensuring that the protective film can be smoothly removed. The protective film can be used to smoothly remove the battery module from the narrow space between the thermal pad and the thermal pad. At the same time, the thermal pad can be protected when the battery module is put into the box, and the thermal pad is not easily damaged due to the collision of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a battery box when the battery module is not installed in the battery box;

[0020] Figure 2 for Figure 1 Schematic diagram of the thermal pad in;

[0021] Figure 3 This is a schematic diagram of a battery module according to an embodiment of the present utility model when it is put into a box;

[0022] Figure 4 for Figure 3 A schematic diagram of a thermal pad assembly in FIG.

[0023] Figure 5 for Figure 4 A partial schematic diagram of the operating ear in FIG.

[0024] In the figure: 1. battery module; 2. battery case; 3. heat dissipation duct; 4. thermal pad; 5. protective film; 51. covering part; 52. lower force transmission part; 53. upper force transmission part; 54. operating ear. DETAILED DESCRIPTION

[0025] The utility model provides a protective film for a thermal pad on the module side in a battery box, wherein the covering portion of the protective film is covered on the side of the thermal pad on the module side facing away from the heat dissipation structure of the battery box to protect the thermal pad when the battery module is put into the box, and the force transmission portion and the force application portion of the protective film on the side facing away from the covering surface can be used to apply a pulling force to the force application portion of the protective film after the battery module is put into the box, and the pulling force can be applied to the part of the covering portion of the protective film away from the force application portion and close to the bottom of the battery box through the force transmission portion, so that the covering portion attached to the thermal pad gradually separates from the thermal pad from the bottom to the top, thereby ensuring that the protective film can be smoothly taken out, and the protective film can be used to smoothly take out the battery module in the narrow space between the thermal pad and the thermal pad, and at the same time, the thermal pad can be protected when the battery module is put into the box, and the thermal pad is not easily damaged due to the collision of the battery module.

[0026] The following is a specific description of the thermal pad assembly of the present invention in combination with an embodiment of the present invention:

[0027] like Figure 3 , Figure 4 , Figure 5 As shown, the thermal pad assembly includes a thermal pad 4 and a protective film 5 coated on the thermal pad 4. The protective film 5 is used to protect the thermal pad 4 when the battery module 1 is placed in the battery box. After the battery module 1 is placed in the box, the protective film 5 will be removed from the thermal pad 4. The battery box includes a battery box body 2 and a heat dissipation duct 3 arranged on the battery box body 2. The heat dissipation duct 3 constitutes a heat dissipation structure of the battery box, such as Figure 3 As shown, the heat dissipation duct 3 extends in the front-to-back direction, and the heat dissipation duct 3 divides the space in the battery box 2 into a plurality of module placement cavities in the left-right direction. The battery modules 1 are used to be placed in the corresponding module placement cavities. There is a row of battery modules 1 on both sides of the heat dissipation duct 3, and each row has a plurality of battery modules 1. Each heat dissipation duct 3 is provided with a plurality of thermal pads 4. Figure 3 The position of the middle protective film 5 corresponds to the position of the thermal pad 4. The thermal pad 4 is used to enhance the thermal conductivity of the side of the battery module 1 on one side of the corresponding battery module 1 in the left and right direction. The thermal pad 4 is a module-side thermal pad arranged in the battery box 2.

[0028] In this embodiment, before the battery module 1 is put into the box, the thermal pad 4 with the protective film 5 is pasted on the heat dissipation duct 3. In order to facilitate the understanding of the structure of the protective film 5, this embodiment is based on the state of the thermal pad assembly pasted on the heat dissipation duct 3. The thermal pad 4 and the protective film 5 are both made of soft materials. The thermal pad 4 is a thermally conductive silicone pad, and the protective film 5 is a PC film. The state of the thermal pad assembly after pasting can be referred to Figure 4 and Figure 5 The same thermal pad 4 has a portion pasted on the left and right opposite sides of the heat dissipation duct 3 and a portion pasted on the top surface of the heat dissipation duct 3. The protective film 5 includes a covering portion 51, a force transmission portion and a force application portion. The force transmission portion includes an upper force transmission portion 53 and a lower force transmission portion 52, and the force application portion is an operating ear portion 54. The covering portion 51 is used to cover the side of the thermal pad 4 facing away from the heat dissipation duct 3 to protect the thermal pad 4 when the battery module 1 is put into the box from top to bottom. The surface of the covering portion 51 that is in contact with the thermal pad 4 is the covering surface. The width of the covering portion 51 is consistent with the width of the thermal pad 4, and the width direction is the front-to-back direction. The force transmission portion and the force application portion are used to be arranged on the side of the covering portion 51 away from the thermal pad 4, that is, the force transmission portion and the force application portion are on the side of the covering portion 51 facing away from the covering surface. The operating ear 54 protrudes upward from the covering portion 51, and also protrudes upward from the battery module 1 and the heat dissipation duct 3. The portion of the covering portion 51 that is close to the bottom of the battery box is connected to the operating ear 54 through a force transmission portion. The lower end of the covering portion 51 is connected to the lower end of the force transmission portion. The upper end of the force transmission portion is provided with an operating ear 54 that protrudes upward from the covering portion 51. The operating ear 54 is used to apply force to the protective film 5 to peel the entire protective film 5 off the thermal pad 4 on the heat dissipation duct 3.

[0029] The protective film 5 is an integrally formed structure. The lower force transmission part 52 constitutes the lower part connected to the covering part 51. The covering part 51 and the force transmission part are integrally arranged. The force transmission part is located on one side of the covering part 51 by bending. The covering part 51 and the force transmission part are integrally folded and connected. A bending structure is formed at the junction of the covering part 51 and the lower force transmission part 52. The width of the lower force transmission part 52 is consistent with the width of the covering part 51. The part where the lower force transmission part 52 and the covering part 51 meet is the lower end. The upper force transmission part 53 constitutes the upper part of the force transmission part connected to the force application part. The part of the upper force transmission part 53 close to the force application part is its upper end and is integrally connected to the force application part. The width of the upper force transmission part 53 is smaller than the width of the lower force transmission part 52. The upper force transmission part 53 and the lower force transmission part 52 have a smooth transition. The width of the upper force transmission part 53 is consistent with the width of the operating ear 54. The narrower force transmission part is convenient for reducing the resistance when the protective film 5 is peeled off.

[0030] The protective film 5 has two covering parts 51 opposite to each other, and the two covering parts 51 are connected to each other through the top connecting part used to cover the top surface of the heat dissipation duct 3. The upper ends of the two covering parts 51 are connected to the top connecting part, and the upper ends of the covering parts 51 are close to the operating ear 54. The two covering parts 51 are used to cover the opposite sides of the thermal pad 4 respectively. The covering parts 51 on both sides are used to protect the thermal pad 4 when the battery modules 1 on the left and right sides of the thermal pad 4 are put into the box. Both covering parts 51 are connected with the force transmission part and the operating ear 54 to facilitate the removal of the protective film 5. The covering part 51 fully covers the corresponding side of the thermal pad 4, which can ensure the protective effect of the side of the thermal pad 4. Of course, it will also have a protective effect when the battery module 1 hits the force transmission part when it is put into the box.

[0031] During the process of putting the battery module 1 into the box, the protective film 5 set on the surface of the thermal pad 4 is used for protection. The protective film 5 can have a smaller friction coefficient than the thermal pad 4, so that the friction between the protective film 5 and the battery module 1 can be smaller. On the one hand, it is convenient for the battery module 1 to be put into the box, and on the other hand, it can prevent the thermal pad 4 from being scratched during the process of putting the battery module 1 into the box. Through the operating ears 54 on the protective film 5, after the battery module 1 is put into the box, the protective film 5 can be taken out through the operating ears 54, which is convenient for the protective film 5 to be taken out in the narrow space between the battery module 1 and the thermal pad 4.

[0032] In other implementations, the protective film may also be a PVC film or a protective film made of other materials.

[0033] In other implementations, the force transmission portion may also be manufactured separately from the covering portion and connected by hot pressing.

[0034] In other implementations, the width of the force transmission portion may also be consistent with the width of the covering portion.

[0035] In other implementations, the protective film may also have only one covering portion, and two protective films are disposed on each thermal pad to protect the two opposite side surfaces of the thermal pad respectively.

[0036] In other implementations, the heat dissipation structure of the battery box may also use a liquid cooling plate instead of the heat dissipation duct. In this case, the thermal pad is attached to the liquid cooling plate.

[0037] Embodiments of the protective film of the utility model for the thermal pad on the module side of the battery box:

[0038] The protective film used for the thermal pad on the module side of the battery box in this embodiment is the same as the protective film of the thermal pad assembly described above, and will not be described again here.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A protective film for the thermal pad on the module side of the battery box, characterized in that: The protective film includes a covering portion, which has a covering surface for covering the side of the module side thermal pad to protect the module side thermal pad when the battery module is placed in a box, and a force transmission portion is connected to the end of the covering portion, and the force transmission portion is located on the side of the covering portion facing away from the covering surface, and a force application portion protruding from the covering portion is provided at the end of the force transmission portion away from the end connected to the covering portion, and the force application portion is used to peel off the entire protective film from the module side thermal pad after the battery module is placed in a box.

2. The protective film for the thermal pad on the module side of the battery box according to claim 1, characterized in that: The force transmission part comprises a lower part connected to the covering part and an upper part connected to the force application part, and the width of the upper part is smaller than the width of the lower part.

3. The protective film for the thermal pad on the module side of the battery box according to claim 2, characterized in that: The width of the upper portion is consistent with the width of the force-applying portion, and the width of the lower portion is consistent with the width of the covering portion.

4. The protective film for the thermal pad on the module side of the battery box according to claim 1, 2 or 3, characterized in that: The covering portion and the force transmission portion are folded and connected in one piece.

5. The protective film for the thermal pad on the module side of the battery box according to claim 1, 2 or 3, characterized in that: The protective film has two covering parts which are arranged opposite to each other, and one end of the two covering parts close to the force-applying part is integrally connected, and the two covering parts are respectively used to cover the opposite side surfaces of the module-side thermal pad on the heat dissipation structure of the battery box.

6. A thermal pad assembly, characterized in that: It includes a module side thermal pad for being arranged in a battery box and a protective film for being arranged on the module side thermal pad, the protective film includes a covering portion, the covering portion has a covering surface for covering the side surface of the module side thermal pad to protect the module side thermal pad when the battery module is placed in the box, the end of the covering portion is connected to a force transmission portion, the force transmission portion is located on the side of the covering portion facing away from the covering surface, and the end of the force transmission portion away from the end connected to the covering portion is provided with a force applying portion protruding from the covering portion, and the force applying portion is used to peel off the entire protective film from the module side thermal pad after the battery module is placed in the box.

7. The thermal pad assembly according to claim 6, characterized in that: The force transmission part comprises a lower part connected to the covering part and an upper part connected to the force application part, and the width of the upper part is smaller than the width of the lower part.

8. The thermal pad assembly according to claim 7, wherein: The width of the upper portion is consistent with the width of the force-applying portion, and the width of the lower portion is consistent with the width of the covering portion.

9. The thermal pad assembly according to claim 6, 7 or 8, characterized in that: The covering portion and the force transmission portion are folded and connected in one piece.

10. The thermal pad assembly according to claim 6, 7 or 8, characterized in that: The protective film has two covering parts which are arranged opposite to each other, and one end of the two covering parts close to the force-applying part is integrally connected, and the two covering parts are respectively used to cover the opposite side surfaces of the module-side thermal pad on the heat dissipation structure of the battery box.

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