Insulating part and battery module

Abstract

The utility model provides an insulator and a battery module, the insulator comprises: an insulating plate, the insulating plate comprises a body and protruding parts, the two ends of at least one side surface of the body are both provided with the protruding parts, and one side of the body close to the protruding parts and the two protruding parts jointly form a mounting part; the heat insulation plate is arranged in the mounting part, and the height of the side, away from the body, of the heat insulation plate is lower than that of the side, away from the body, of the protruding part. By applying the technical scheme of the utility model, the technical problem of inconsistent attenuation of the battery cells can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to an insulating part and a battery module. Background Art

[0002] In the related art, a battery module generally includes a plurality of battery cells, end plates and insulating parts. The plurality of battery cells are arranged at intervals in a direction in sequence. The two end plates are respectively located at opposite ends of the plurality of battery cells in their arrangement direction. The insulating parts are arranged between the battery cells and the end plates. However, the existing insulating parts are closely attached to the battery cells. During the cycling process of the battery cells, the battery cells will expand. In this way, only one side of the battery cells near the end plate has an expansion space, while both sides of the battery cells near the middle position have expansion spaces. This will cause the attenuation of the battery cells near the end plate side to be much faster than that of the battery cells in the middle position, thereby shortening the cycling life of the module and the battery pack. Summary of the Utility Model

[0003] An embodiment of the utility model provides an insulating part and a battery module, which can improve the technical problem of inconsistent attenuation of battery cells.

[0004] In a first aspect, an embodiment of the utility model provides an insulating part. The insulating part includes: an insulating plate, the insulating plate includes a body and a convex part. The two ends of at least one side surface of the body are both provided with convex parts. An installation part is jointly formed between one side of the body close to the convex part and the two convex parts; a heat insulation plate, which is arranged in the installation part, and the height of the side of the heat insulation plate away from the body is lower than the height of the side of the convex part away from the body.

[0005] In one embodiment, convex parts are arranged on one side surface of the insulating part arranged between the end plate and the battery cell. The insulating part further includes fixing parts. Fixing parts are arranged on the side of the body away from the convex part, and fixing parts are arranged on the side of the convex part away from the body.

[0006] In one embodiment, the height difference between the side of the heat insulation plate away from the body and the side of the fixing part located on the convex part away from the body is H1, and the thickness of the heat insulation plate is H2, where 0mm < H1 ≤ 3mm and / or 0mm < H2 ≤ 2mm.

[0007] In one embodiment, the fixing part on the side of the body away from the convex part covers the body.

[0008] In one embodiment, the body and the convex part are of a split structure, or the body and the convex part are of an integrally formed structure.

[0009] In one embodiment, the heat insulation plate includes foam or aerogel.

[0010] In one embodiment, the extension length of the convex part along the width direction of the body is less than or equal to the width of the body.

[0011] In one embodiment, the convex portion includes a multi-segment structure and is arranged at intervals in the width direction of the body, or the convex portion is an integrally formed structure.

[0012] In one embodiment, convex portions are provided on both side surfaces of the insulating member disposed between two adjacent battery cells. The insulating member further includes a fixing member, and the fixing member is provided on the side of the convex portion away from the body.

[0013] In a second aspect, an embodiment of the present invention provides a battery module, which includes: a battery cell assembly including a plurality of battery cells arranged at intervals; two end plates respectively disposed at both ends of the battery cell assembly; and the above-mentioned insulating member, and an insulating member is disposed between the end plate and the battery cell assembly.

[0014] In one embodiment, the battery module further includes a heat insulation member, and the heat insulation member is disposed between the end plate and the battery cell and / or between two adjacent battery cells.

[0015] In one embodiment, the heat insulation member includes: a heat insulation sheet; an insulating sheet, and insulating sheets are provided on both sides of the heat insulation sheet corresponding to the battery cell, and the insulating sheets are located at both ends of each side of the heat insulation sheet, and a connecting member is provided on the side of the insulating sheet away from the heat insulation sheet; wherein, the heat insulation member is connected to two adjacent battery cells through the connecting member.

[0016] In one embodiment, the sum of the heights of the insulating sheet and the connecting member on the same side is H3, 0 mm < H3 ≤ 3 mm, and the height of the heat insulation sheet is H4, 1 mm ≤ H4 ≤ 4 mm.

[0017] In one embodiment, the heat insulation member disposed between the end plate and the battery cell includes: a heat insulation sheet; an insulating sheet, and insulating sheets are provided at both ends of the heat insulation sheet corresponding to one side of the battery cell, and connecting members are provided on the side of the insulating sheet away from the heat insulation sheet and on the side of the heat insulation sheet close to the end plate.

[0018] Applying the technical solution of the present invention, the heat insulation plate is disposed in the installation portion, and the height of the side of the heat insulation plate away from the body is lower than the height of the side of the convex portion away from the body. With such a setting, after the side of the convex portion away from the body is connected to the battery cell through the fixing member, there is a gap between the heat insulation plate and the battery cell. When the battery cell on the side close to the end plate expands, it can enable the side of the battery cell close to the end plate to have an expansion space, so as to ensure that there is an expansion space on both sides of the battery cell close to the end plate. In this way, the attenuation of the battery cell close to the end plate side is the same as that of the battery cell in the middle position, so as to ensure the attenuation consistency of the battery cells, which is beneficial to extending the cycle life of the module and the battery pack. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is a three-dimensional schematic diagram of an insulating part provided by an embodiment of the present utility model;

[0021] Figure 2 is a side schematic diagram of an insulating part provided by an embodiment of the present utility model;

[0022] Figure 3 is a structural schematic diagram of a battery module provided by an embodiment of the present utility model;

[0023] Figure 4 is Figure 3 an enlarged schematic diagram of part A in;

[0024] Figure 5 is a side schematic diagram of a heat insulation part provided by an embodiment of the present utility model.

[0025] Among them, the above-mentioned drawings include the following reference numerals:

[0026] 10, insulating board; 11, body; 12, convex part;

[0027] 20, heat insulation board;

[0028] 30, fixing part;

[0029] 40, battery cell;

[0030] 50, end plate;

[0031] 60, heat insulation part; 61, heat insulation sheet; 62, insulating sheet; 63, connecting part; X, width direction. Detailed implementation manners

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0033] Such as Figures 1 to 5As shown in the figure, in a first aspect, an embodiment of the present utility model provides an insulating member, which includes: an insulating plate 10, the insulating plate 10 includes a main body 11 and a convex portion 12, convex portions 12 are provided at both ends of the main body 11, and an installation portion is jointly formed between one side of the main body 11 close to the convex portion 12 and the two convex portions 12; a heat insulation plate 20, which is arranged in the installation portion, and the height of the side of the heat insulation plate 20 away from the main body 11 is lower than the height of the side of the convex portion 12 away from the main body 11.

[0034] Applying the technical solution of the present utility model, the heat insulation plate 20 is arranged in the installation portion, and the height of the side of the heat insulation plate 20 away from the main body 11 is lower than the height of the side of the convex portion 12 away from the main body 11. With such a setting, when the side of the convex portion 12 away from the main body 11 is connected to the battery cell 40 through the fixing member 30, there is a gap between the heat insulation plate 20 and the battery cell 40. After the battery cell 40 on the side close to the end plate 50 expands, it can make the side of the battery cell 40 close to the end plate 50 have an expansion space, so as to ensure that there is an expansion space on both sides of the battery cell 40 close to the end plate 50. In this way, the attenuation of the battery cell 40 on the side close to the end plate 50 is the same as that of the battery cell 40 in the middle position, so as to ensure the attenuation consistency of the battery cell 40, which is beneficial to extending the cycle life of the module and the battery pack.

[0035] In this application, the fixing member 30 is specifically a double-sided adhesive tape, because the double-sided adhesive tape has:

[0036] 1. Strong adhesion: The double-sided adhesive tape has excellent adhesion, so it can ensure the connection strength when the insulating member is connected to the battery cell 40 and the end plate 50.

[0037] 2. Simple operation: In this application, only one side of the double-sided adhesive tape needs to be attached to the insulating plate 10, and the other side only needs to be attached to the battery cell 40 or the end plate 50 during installation. Compared with other adhesives, such as liquid glue or hot melt adhesive, the double-sided adhesive tape does not require additional tools or equipment, reducing the operation difficulty, which is beneficial to improving the disassembly and assembly efficiency between components.

[0038] 3. High aesthetic degree: The bonding surface of the double-sided adhesive tape is usually relatively flat, which can keep the bonded materials clean and beautiful. At the same time, there are various choices for the color and thickness of the double-sided adhesive tape, which can be matched according to specific needs to improve the overall aesthetic degree.

[0039] 4. Low cost: Compared with other adhesives, the price of the double-sided adhesive tape is usually more affordable, making it have a higher cost performance. In addition, the service life of the double-sided adhesive tape is longer, which can reduce the storage cost and production cost of materials.

[0040] 5. Good environmental protection: With the improvement of environmental protection awareness, more and more double-sided adhesive tape products begin to be made of environmentally friendly materials, reducing environmental pollution.

[0041] Specifically, a convex portion 12 is provided on one side of the insulating member disposed between the end plate 50 and the battery cell 40. The insulating member further includes a fixing member 30. The fixing member 30 is provided on the side of the main body 11 away from the convex portion 12, and the fixing member 30 is provided on the side of the convex portion 12 away from the main body 11; wherein, the side of the main body 11 away from the convex portion 12 is fixedly connected to the battery end plate 50 through the fixing member 30.

[0042] The side of the convex portion 12 away from the main body 11 is connected to the battery cell 40 through the fixing member 30. The height difference between the side of the heat insulation plate 20 away from the main body 11 and the side of the fixing member 30 located on the convex portion 12 away from the main body 11 is H1, and 0 mm < H1 ≤ 3 mm. When H1 > 3 mm, the height difference between the side of the heat insulation plate 20 away from the main body 11 and the side of the fixing member 30 located on the convex portion 12 away from the main body 11 is too large, which will cause the gap between the heat insulation plate 20 and the battery cell 40 to be too large, thus being unfavorable for the heat insulation plate 20 to insulate the battery cell 40 and reducing the heat insulation effect of the heat insulation plate 20. Therefore, setting 0 mm < H1 ≤ 3 mm can ensure the heat insulation effect of the heat insulation plate 20, and at the same time can also ensure that the battery cell 40 close to the end plate 50 has a certain expansion space. Optionally, H1 can be set to 1 mm, 2 mm or 3 mm, etc. The specific setting should be selected according to the use environment of the device, so as to improve the applicable range of the device.

[0043] Further, the thickness of the heat insulation plate 20 is H2, and 0 mm < H2 ≤ 2 mm. When H2 > 2 mm, the thickness of the heat insulation plate 20 is too thick, which will increase the materials required for production, thus increasing the production cost of the structure and being not conducive to the mass production of the device. Therefore, setting 0 mm < H2 ≤ 2 mm can not only ensure the heat insulation effect of the heat insulation plate 20, but also reduce the production cost of the component.

[0044] Specifically, the fixing member 30 on the side of the main body 11 away from the convex portion 12 covers the main body 11. With this setting, the contact area between the insulating member and the end plate 50 can be increased, thereby improving the connection strength between the insulating member and the end plate 50 and being beneficial to ensuring the stability during the operation of the device.

[0045] Further, the main body 11 and the convex portion 12 are of a split structure. In this application, the main body 11 is a pc board, and the convex portion 12 is a pc strip. Pc is polycarbonate, which is a thermoplastic engineering plastic with high mechanical properties, optical properties, electrical properties and thermal properties. Its molecular chain contains a carbonate group. According to the different ester groups in the molecular structure, it can be divided into various types such as aliphatic, alicyclic, aliphatic-aromatic type, etc. Among them, the aromatic polycarbonate with practical value is the most important, and the bisphenol A type polycarbonate is the most important.

[0046] PC materials have excellent heat resistance and a relatively high heat distortion temperature, enabling them to withstand high-temperature environments. The maximum temperature they can withstand may vary according to different records, but generally can reach 140°C or even 160°C. Therefore, the stability of the device during operation can be ensured.

[0047] Of course, in other embodiments of the present application, the main body 11 and the protruding portion 12 can also be set as an integrally formed structure, as long as the usage requirements of the device can be met. At the same time, the materials of the main body 11 and the protruding portion 12 can also be set as pp. PP material, that is, polypropylene, is a thermoplastic synthetic resin with excellent performance and is a colorless, translucent thermoplastic lightweight general-purpose plastic. It has the following remarkable characteristics:

[0048] 1. Lightweight: The density of PP material is relatively low, so it is light in weight, which gives PP material an advantage in applications that require lightweighting.

[0049] 2. Heat resistance: PP material has good heat resistance and can withstand high temperatures without being easily melted or deformed, which enables it to maintain stable performance in high-temperature environments.

[0050] 3. Corrosion resistance: PP material has good corrosion resistance to many chemical substances and solvents, so it can maintain stable performance in a variety of harsh environments.

[0051] 4. Electrical properties: PP material has excellent electrical insulation properties and is suitable for applications in the electrical and electronic fields.

[0052] In addition, PP material also has high-strength mechanical properties and good high-wear resistance processing properties. Therefore, it can meet the usage requirements of the device.

[0053] Specifically, the heat insulation board 20 includes foam or aerogel. Among them, the foam can be made of materials such as silicone foam, MPP foam or XPP foam. Silicone foam is a foam sponge-like silicone material formed by the foaming of polysiloxane and has excellent characteristics such as high flame retardancy, aging resistance, super waterproofness, super dustproofness, lightweight, insulation, and resistance to high and low temperatures. Its service life is 3 to 5 times that of traditional foam materials, and it is also significantly superior to traditional foam materials in terms of comfort, foam density and environmental protection. Silicone foam is widely used in the sealing of lithium battery boxes and the shock absorption of the bottom of new energy vehicle boxes, the shock absorption materials of the liquid cooling system of new energy vehicles, the support and shock absorption of the floating floors of high-speed trains, the lightweight sealing materials of aerospace, and the sealing of instruments and meters such as 5G signal towers. In addition, in the construction field, silicone foam is widely used due to its excellent sound insulation, earthquake resistance and waterproof performance.

[0054] MPP foam, namely polypropylene microcellular foaming material, has cell sizes less than 100 microns, and more strictly defined as cell sizes less than 10 microns, with a cell density greater than 10 to the 9th power per cubic centimeter. Due to its characteristics such as light weight, heat insulation, sound absorption, shock resistance, corrosion resistance, and low thermal conductivity, MPP foam has a wide range of applications in various industrial products, consumer goods, and building materials.

[0055] Aerogel is a new type of nano-porous solid material. The combined volume of all its pores accounts for the vast majority of the entire aerogel volume, even reaching more than 99%. This material has special microstructural characteristics such as a high specific surface area, a high porosity, nano-scale pores, and a low density. At the same time, it has stable chemical properties, a low thermal conductivity, high temperature resistance, high elasticity, strong adsorption, good waterproof effect, a wide operating temperature range, and a long lifespan.

[0056] There are various preparation methods for aerogel, including the sol-gel method, supercritical drying method, gel casting method, vacuum impregnation method, and chemical vapor deposition method, etc. Among them, the sol-gel method is one of the most commonly used methods. The supercritical drying method can effectively prevent the shrinkage of the sol-gel and the collapse of the pore channels, obtaining a highly porous aerogel.

[0057] The application fields of aerogel are very extensive. In environmental governance, it can be used in oil-water separation, water treatment, air purification and other fields, such as treating industrial wastewater and purifying harmful substances in indoor air. In sound wave isolation, due to its pore structure and low density, aerogel can be used to manufacture sound insulation panels, sound processing equipment, etc. In addition, aerogel can be combined with other materials to manufacture lightweight composite materials for use in the automotive, aerospace and other fields to reduce the weight of the materials. In the protection of electronic devices, aerogel can be used to reduce the impact of temperature changes and vibrations on electronic devices. In the biomedical field, aerogel can be applied to drug sustained release, tissue engineering, artificial organs, etc.

[0058] Therefore, selecting the above materials for the heat insulation plate 20 can not only meet the heat insulation function of the battery cell 40, reduce the heat transfer from the battery cell 40 to the end plate 50, improve the temperature difference between the battery cell 40 on the end plate 50 side and the middle battery cell 40 of the module, but also reduce the production cost of the component.

[0059] Specifically, the extension length of the convex portion 12 along the width direction of the body 11 is less than or equal to the width of the body 11. Such a setting can not only enable the convex portion 12 to meet the usage requirements of the insulating part, but also reduce the materials required for the production of the convex portion 12 to a certain extent. Therefore, it can reduce the production cost of the component and is conducive to the mass production of the component.

[0060] Furthermore, the protruding portion 12 includes a multi-segment structure and is arranged at intervals in the width direction of the main body 11, or the protruding portion 12 is an integrally formed structure. With this arrangement, the structure of the protruding portion 12 can be set according to the insulating part in different environments, thereby improving the applicability and scope of application of the insulating part.

[0061] Specifically, protruding portions 12 are provided on both sides of the insulating part disposed between two adjacent battery cells 40. The insulating part further includes a fixing member 30, and the fixing member 30 is provided on the side of the protruding portion 12 away from the main body 11. By providing the above structure, when the battery cell 40 expands, the insulating part can timely provide an expansion space for the battery cell 40, so as to absorb part of the expansion force of the battery cell 40, reduce the probability of structural damage of the insulating part, and further extend the service life of the insulating part.

[0062] In a second aspect, an embodiment of the present invention provides a battery module, which includes: a battery cell 40 assembly including a plurality of battery cells 40 arranged at intervals; two end plates 50 respectively disposed at both ends of the battery cell 40 assembly; and the above-mentioned insulating part, and an insulating part is disposed between the end plate 50 and the battery cell 40 assembly.

[0063] Furthermore, the battery module further includes a heat insulation member 60, and the heat insulation member 60 is disposed between the end plate 50 and the battery cell 40 and / or between two adjacent battery cells 40. With this arrangement, the heat insulation effect of the battery cell 40 can be ensured, which is beneficial to maintaining the stability during the operation of the device.

[0064] Specifically, the heat insulation member 60 includes: a heat insulation sheet 61; an insulating sheet 62, and insulating sheets 62 are disposed on both sides of the heat insulation sheet 61 corresponding to the battery cell 40, and the insulating sheets 62 are located at both ends of each side of the heat insulation sheet 61, and a connecting member 63 is provided on the side of the insulating sheet 62 away from the heat insulation sheet 61; wherein, the heat insulation member 60 is connected to two adjacent battery cells 40 through the connecting member 63.

[0065] In an embodiment, the sum of the height of the insulating sheet 62 and the connecting member 63 on the same side is H3, and 0 mm < H3 ≤ 3 mm, and the height of the heat insulation sheet 61 is H4, and 1 mm ≤ H4 ≤ 4 mm. In the present application, H1 is equal to H3. With this arrangement, it can be ensured that the expansion spaces on both sides of the battery cell 40 close to the end plate 50 are the same as those on both sides of the battery cell 40 located in the middle position, which is beneficial to extending the cycle life of the device.

[0066] Further, the heat insulation member 60 disposed between the end plate 50 and the battery cell 40 includes: a heat insulation sheet 61; an insulating sheet 62. Insulating sheets 62 are disposed at both ends of the heat insulation sheet 61 on the side corresponding to the battery cell 40. Connecting members 63 are disposed on the side of the insulating sheet 62 away from the heat insulation sheet 61 and on the side of the heat insulation sheet 61 close to the end plate 50. With such a setting, not only can the stability of the connection between the heat insulation member 60 and the end plate 50 be ensured, but also an expansion space can be provided for the battery cell 40, so that part of the expansion force of the battery cell 40 can be absorbed, thereby reducing the probability of structural damage to the heat insulation member 60, and further extending the service life of the heat insulation member 60.

[0067] In this application, in order to ensure that the expansion spaces of all the battery cells 40 in the battery module at the end of the service life are the same, it is necessary to ensure that the thickness H3 of the heat insulation plate 20 of the insulating sheet 62 at the end of the service life * the compression rate Y% of the heat insulation plate 20 = half of the thickness of the heat insulation member 60 H4 / 2 * the compression rate X% of the heat insulation sheet 61.

[0068] Applying the technical solution of the present utility model, the heat insulation plate 20 is disposed in the installation portion, and the height of the side of the heat insulation plate 20 away from the main body 11 is lower than the height of the side of the convex portion 12 away from the main body 11. With such a setting, after the side of the convex portion 12 away from the main body 11 is connected to the battery cell 40 through the fixing member 30, there is a gap between the heat insulation plate 20 and the battery cell 40. After the battery cell 40 on the side close to the end plate 50 expands, an expansion space can be provided on the side of the battery cell 40 close to the end plate 50, so that expansion spaces can be ensured on both sides of the battery cell 40 close to the end plate 50. In this way, the attenuation of the battery cell 40 on the side close to the end plate 50 tends to be the same as the attenuation of the battery cell 40 at the middle position, so that the attenuation consistency of the battery cell 40 can be ensured, which is beneficial to extending the cycle life of the module and the battery pack.

[0069] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof. Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0070] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0071] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" can be used herein to describe the spatial positional relationships of one device or feature and other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation described in the figures of the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used herein.

[0072] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without additional declaration, the above terms have no special meaning, and therefore should not be construed as a limitation on the protection scope of the present utility model.

[0073] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An insulating member, characterized in that: The insulating member comprises: An insulating plate, the insulating plate comprising a body and a protrusion, the protrusions being arranged at both ends of at least one side of the body, and a mounting portion being formed between one side of the body close to the protrusion and two protrusions; A heat insulation board is arranged in the installation part, and the height of the heat insulation board away from the main body is lower than the height of the protrusion away from the main body.

2. The insulating member according to claim 1, characterized in that The protrusion is arranged on one side of the insulating member arranged between the end plate and the battery core. The insulating member also includes a fixing member. The fixing member is arranged on a side of the body away from the protrusion, and the fixing member is arranged on a side of the protrusion away from the body.

3. The insulating member according to claim 2, characterized in that: The height difference between the side of the heat insulation board away from the body and the side of the fixing member on the protrusion away from the body is H1, and the thickness of the heat insulation board is H2, 0mm<H1≤3mm and / or 0mm<H2≤2mm.

4. The insulating member according to claim 2, characterized in that: The fixing member on the side of the body away from the protruding portion covers the body.

5. The insulating member according to any one of claims 2 to 4, characterized in that: The main body and the protrusion are separate structures, or the main body and the protrusion are integrally formed structures.

6. The insulating member according to claim 1, characterized in that The thermal insulation board comprises foam or aerogel.

7. The insulating member according to claim 1, characterized in that: An extension length of the protrusion along a width direction of the body is less than or equal to a width of the body.

8. The insulating member according to claim 1, characterized in that: The protrusions include a multi-stage structure and are arranged at intervals along the width direction of the body, or the protrusions are an integrally formed structure.

9. The insulating member according to claim 1, characterized in that: The protrusions are arranged on both side surfaces of the insulating member arranged between two adjacent battery cells. The insulating member also includes a fixing member. The fixing member is arranged on a side of the protrusion away from the body.

10. A battery module, characterized in that: The battery module comprises: A battery cell assembly, comprising a plurality of battery cells arranged at intervals; Two end plates, respectively disposed at two ends of the battery core assembly; The insulating member as described in any one of claims 1 to 8, wherein the insulating member is arranged between the end plate and the battery cell assembly.

11. The battery module according to claim 10, characterized in that: The battery module further includes a heat insulating member, which is disposed between the end plate and the battery cell and / or between two adjacent battery cells.

12. The battery module according to claim 11, characterized in that: The heat insulating member disposed between two adjacent battery cells comprises: Thermal insulation sheet; An insulating sheet, wherein the insulating sheet is disposed on both sides of the thermal insulation sheet corresponding to the battery core, and the insulating sheet is located at both ends of each side of the thermal insulation sheet, and a connecting piece is disposed on the side of the insulating sheet away from the thermal insulation sheet; Wherein, the thermal insulation member is connected to two adjacent battery cells via the connecting member.

13. The battery module according to claim 12, characterized in that: The sum of the heights of the insulating sheet and the connecting piece on the same side is H3, 0mm<H3≤3mm, and the height of the heat insulation sheet is H4, 1mm≤H4≤4mm.

14. The battery module according to claim 11, characterized in that: The heat insulating member disposed between the end plate and the battery core comprises: Thermal insulation sheet; An insulating sheet is provided on both ends of the insulating sheet corresponding to one side of the battery core, and a connecting piece is provided on the side of the insulating sheet away from the insulating sheet and the side of the insulating sheet close to the end plate.

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