A shock-resistant thermal insulation sheet for a battery

Abstract

The utility model relates to the technical field of heat insulation sheet, and disclose a kind of impact-resistant heat insulation sheet for battery, the both sides of impact-resistant layer are provided with heat insulation layer, the outside of impact-resistant layer and heat insulation layer is covered with frame, the outside of frame and heat insulation layer is covered with protective film, the both sides of two protective films are covered with adhesive layer, and the micropore of uniformly distributed is provided on impact-resistant layer;The utility model can effectively absorb and disperse the mechanical impact energy generated by external collision or extrusion by setting impact-resistant layer, fiber reinforced resin matrix composite material, avoid heat insulation sheet structure collapse, provide reliable physical barrier for internal battery monomer, greatly reduce the risk of battery internal short circuit due to impact, and by setting heat insulation layer filling in the micropore inside impact-resistant layer and covering the outside of impact-resistant layer, the transmission of high-temperature heat flow generated when battery thermal runaway between battery monomer or module can be effectively retarded, delay even prevent heat spread.

Description

Technical Field

[0001] This utility model relates to the field of heat insulation sheet technology, specifically to an impact-resistant heat insulation sheet for batteries. Background Technology

[0002] Cars require a lot of power to run. New energy vehicles powered by electricity need the battery compartment to provide a large current for a long time to ensure normal operation. However, the battery temperature will gradually rise due to prolonged power supply. In order to maintain good battery performance, the battery temperature generally cannot exceed 60°C. At this time, heat insulation sheets are needed to isolate heat transfer between batteries and slow down the rate of temperature rise.

[0003] Traditional heat insulation sheets are generally made by pressing or bonding heat insulation materials into a sheet shape and then installing them between two batteries to achieve a heat insulation effect. When a car is involved in a collision, the heat insulation sheet located between the two batteries is easily damaged by the impact, thus failing to achieve an effective heat insulation effect. Therefore, an impact-resistant heat insulation sheet for batteries is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide an impact-resistant heat insulation sheet for batteries, in order to solve the problem mentioned in the background art that traditional heat insulation sheets are generally formed by pressing or bonding heat insulation materials into a sheet shape and then installing them between two batteries to achieve a heat insulation effect. When a car is involved in a collision, the heat insulation sheet located between the two batteries is easily damaged by the impact, thus failing to achieve an effective heat insulation effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an impact-resistant heat insulation sheet for batteries, comprising...

[0006] An impact-resistant layer is provided on both sides of the impact-resistant layer. A frame is wrapped around the outside of the impact-resistant layer and the heat insulation layer. A protective film is covered on the outside of the frame and the heat insulation layer. An adhesive layer is covered on both sides of the two protective films. Uniformly distributed micropores are provided on the impact-resistant layer.

[0007] Preferably, both the frame and the protective film are made of PET material, and the protective film is a PET film.

[0008] Preferably, the impact-resistant layer described above is composed of fiber-reinforced resin-based composite material.

[0009] Preferably, the aforementioned heat insulation layer is a silica aerogel that has been modified with hydrophobicity and doped with flame retardants.

[0010] Preferably, the two aforementioned heat insulation layers fill the interior of the micropores and cover both sides of the impact-resistant layer.

[0011] Preferably, the adhesive layer described above is a high-temperature resistant, flame-retardant pressure-sensitive adhesive with a thickness of 0.02mm-0.1mm.

[0012] Preferably, the thickness of the impact-resistant layer is 0.3mm-1.0mm, and the thickness of the heat insulation layer is 0.6mm-2.0mm.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0014] This invention, by setting an impact-resistant layer, enables the fiber-reinforced resin-based composite material to effectively absorb and disperse the mechanical impact energy generated by external collisions or compressions, preventing the thermal insulation sheet structure from collapsing and providing a reliable physical barrier for the internal battery cells. This significantly reduces the risk of internal short circuits caused by impacts. Furthermore, by setting a thermal insulation layer to fill the micropores inside the impact-resistant layer and cover the outside of the impact-resistant layer, it can effectively block the transfer of high-temperature heat flow generated during battery thermal runaway between battery cells or modules, delaying or even preventing heat spread. In addition, the thermal insulation layer is modified with hydrophobic agents and doped with flame retardants, giving it hydrophobic and flame-retardant properties, enabling it to maintain structural stability and thermal insulation performance in high-temperature and high-humidity environments and under open flame conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the heat insulation layer structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the microporous structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Impact-resistant layer; 101. Micropores; 2. Adhesive layer; 3. Heat insulation layer; 4. Frame; 5. Protective film. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] Example

[0024] In existing technologies, heat insulation sheets are generally made by pressing or bonding heat insulation materials into a sheet shape, and then installing them between two batteries to achieve a heat insulation effect. When a car is involved in a collision, the heat insulation sheet located between the two batteries is easily damaged by the impact, thus failing to achieve an effective heat insulation effect.

[0025] Please see Figure 1-4 This utility model provides a technical solution: an impact-resistant heat insulation sheet for batteries, including an impact-resistant layer 1, heat insulation layers 3 on both sides of the impact-resistant layer 1, a frame 4 covering the outer sides of the impact-resistant layer 1 and the heat insulation layers 3, and a protective film 5 covering the outer sides of both the frame 4 and the heat insulation layers 3. An adhesive layer 2 is covered on both sides of the two protective films 5. The adhesive layer 2 securely adheres the heat insulation sheet to the surface of the battery cell, preventing displacement and detachment. The impact-resistant layer 1 has uniformly distributed micropores 101. By providing the impact-resistant layer 1, fiber-reinforced resin... The ester-based composite material can effectively absorb and disperse the mechanical impact energy generated by external collisions or compressions, prevent the thermal insulation sheet structure from collapsing, provide a reliable physical barrier for the internal battery cells, and greatly reduce the risk of internal short circuits caused by impacts. The two thermal insulation layers 3 fill the interior of the micropores 101 and cover both sides of the impact-resistant layer 1. By setting the thermal insulation layer 3 to fill the micropores 101 inside the impact-resistant layer 1 and cover the outside of the impact-resistant layer 1, it can effectively block the transfer of high-temperature heat flow generated during battery thermal runaway between battery cells or modules, delaying or even preventing heat spread.

[0026] Both the frame 4 and the protective film 5 are made of PET material. The protective film 5 is a PET film. The frame 4 provides edge protection for the heat insulation sheet and improves the overall bending strength of the heat insulation sheet. The protective film 5 is a PET film. The PET film is applied to the outside of the frame 4 and the heat insulation layer 3 by hot pressing. It can provide stable protection in high-temperature environments and ensure that the heat insulation performance and structural integrity of the heat insulation layer 3 are not affected. The impact-resistant layer 1 is made of fiber-reinforced resin-based composite material. The fiber is at least one of aramid fiber, basalt fiber or carbon fiber, and the resin matrix is ​​high-temperature resistant epoxy resin, phenolic resin or polyimide resin.

[0027] The heat insulation layer 3 is a silica aerogel that has been modified with hydrophobicity and doped with flame retardant. The heat insulation layer 3 is modified with hydrophobicity and doped with flame retardant, so that it has hydrophobicity and flame retardancy. It can maintain structural stability and heat insulation performance in high temperature and high humidity environments and under open flame conditions. The flame retardant can be nano-sized aluminum hydroxide flame retardant.

[0028] The adhesive layer 2 is a high-temperature resistant, flame-retardant, pressure-sensitive adhesive with a thickness of 0.05 mm, the impact-resistant layer 1 has a thickness of 1 mm, and the heat insulation layer 3 has a thickness of 1.5 mm.

[0029] The working principle or structural principle is as follows: By setting the impact-resistant layer 1, the fiber-reinforced resin matrix composite material can effectively absorb and disperse the mechanical impact energy generated by external collisions or compressions, preventing the thermal insulation sheet structure from collapsing and providing a reliable physical barrier for the internal battery cells. This greatly reduces the risk of internal short circuits caused by impacts. Moreover, by setting the thermal insulation layer 3 to fill the micropores 101 inside the impact-resistant layer 1 and cover the outside of the impact-resistant layer 1, it can effectively block the transfer of high-temperature heat flow generated during battery thermal runaway between battery cells or modules, delaying or even preventing heat spread. Furthermore, the thermal insulation layer 3 is modified with hydrophobic agents and doped with flame retardants, giving it hydrophobic and flame-retardant properties, enabling it to maintain structural stability and thermal insulation performance in high-temperature and high-humidity environments and under open flame conditions. The adhesive layer 2 can firmly adhere the thermal insulation sheet to the surface of the battery cells, preventing displacement and detachment. The frame 4 provides edge protection for the thermal insulation sheet and improves the overall bending strength of the thermal insulation sheet. The protective film 5 is a PET film, which can provide stable protection in high-temperature environments, ensuring that the thermal insulation performance and structural integrity of the thermal insulation layer 3 are not affected.

[0030] In summary, this invention, by setting an impact-resistant layer, enables the fiber-reinforced resin-based composite material to effectively absorb and disperse the mechanical impact energy generated by external collisions or compressions, preventing the thermal insulation sheet structure from collapsing and providing a reliable physical barrier for the internal battery cells. This significantly reduces the risk of internal short circuits caused by impacts. Furthermore, by filling the micropores inside the impact-resistant layer and covering the outside of the impact-resistant layer, the thermal insulation layer can effectively block the transfer of high-temperature heat flow generated during battery thermal runaway between battery cells or modules, delaying or even preventing heat propagation. Moreover, the thermal insulation layer is modified with hydrophobic agents and doped with flame retardants, giving it hydrophobic and flame-retardant properties, enabling it to maintain structural stability and thermal insulation performance in high-temperature and high-humidity environments and under open flame conditions.

[0031] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings. It should be noted that implementations not illustrated or described in the drawings or the main text of the specification are forms known to those skilled in the art and have not been described in detail. Furthermore, the definitions of the components described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments, and those skilled in the art can easily modify or substitute them.

[0032] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery-grade impact-resistant heat insulation sheet, characterized in that, include An impact-resistant layer (1) is provided on both sides of the impact-resistant layer (1), and a heat insulation layer (3) is provided on both sides of the impact-resistant layer (1) and the heat insulation layer (3). A frame (4) is provided on the outside of the impact-resistant layer (1) and the heat insulation layer (3). A protective film (5) is provided on both sides of the protective film (5). A bonding layer (2) is provided on both sides of the impact-resistant layer (1). Uniformly distributed micropores (101) are provided on the impact-resistant layer (1).

2. The impact-resistant heat insulation sheet for batteries according to claim 1, characterized in that, The frame (4) and the protective film (5) are both made of PET material, and the protective film (5) is a PET film.

3. The impact-resistant heat insulation sheet for batteries according to claim 1, characterized in that, The impact-resistant layer (1) is composed of fiber-reinforced resin-based composite material.

4. The impact-resistant heat insulation sheet for batteries according to claim 1, characterized in that, The two insulation layers (3) fill the interior of the micropores (101) and cover both sides of the impact-resistant layer (1).

5. The impact-resistant heat insulation sheet for batteries according to claim 1, characterized in that, The adhesive layer (2) is a high-temperature resistant, flame-retardant pressure-sensitive adhesive with a thickness of 0.02mm-0.1mm.

6. The impact-resistant heat insulation sheet for batteries according to claim 1, characterized in that, The thickness of the impact-resistant layer (1) is 0.3mm-1.0mm, and the thickness of the heat insulation layer (3) is 0.6mm-2.0mm.

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