Insulation mat with phase change material

Abstract

The utility model discloses a heat insulation pad with a phase change material. The heat insulation pad comprises a heat insulation pad core material and a protective film, a heat insulation cushion core material comprises a phase change material, an upper ceramic aerogel felt and a lower ceramic aerogel felt, the phase change material comprises a phase change core material and a copper foil film, the copper foil film wraps the periphery of the phase change core material, the upper ceramic aerogel felt is arranged on the upper surface of the phase change material in an overlapped mode, and the lower ceramic aerogel felt is arranged on the lower surface of the phase change material in an overlapped mode. The lower ceramic aerogel felt is overlapped on the lower surface of the phase change material, and the protective film is coated on the periphery of the heat insulation pad core material, so that the heat insulation pad can effectively enhance the heat insulation performance of a product, heat conduction is not easy to occur between two adjacent battery cells, heat can be effectively blocked, the safety performance during use is improved, and the service life of the product is prolonged. The mechanical strength and the compression buffering performance of the product are effectively improved, the heat insulation pad is not prone to being damaged under the external acting force, the quality of the product is improved, the service life is prolonged, and the existing requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of heat insulation pads, in particular to a heat insulation pad with a phase change material. Background Art

[0002] With the development of social economy and the improvement of people's living standards, new energy vehicles have become emerging means of transportation and are loved by many people. The market share of new energy vehicles is getting higher and higher. New energy vehicles have many advantages, such as saving fuel energy, reducing waste gas emissions, effectively protecting the environment, low noise, and low usage costs. For new energy vehicles, the safety issue of the new energy module (i.e., the battery) is very crucial. And with the increasing market demand for the cruising range of new energy vehicles, the capacity of the new energy module is getting larger and the energy density is getting higher. Once a thermal runaway occurs in the new energy module, it will be very dangerous.

[0003] The new energy module includes multiple battery modules. During the driving of the vehicle, the battery cells in each battery module will be squeezed and rubbed against each other due to vibration, resulting in overheating runaway or even catching fire. Therefore, it is necessary to set heat insulation pads between adjacent battery cells.

[0004] In the prior art, most use phase change materials as heat insulation pads and directly place them between two adjacent battery cells in the battery module. The phase change material usually consists of hydrated salts, waxes, etc. as the phase change core material and is encapsulated with a thin copper foil on the surface. When the ambient temperature is high, the material changes from a solid state to a liquid state and absorbs heat. By the property transformation of the phase change material, a large amount of heat is taken away to prevent thermal runaway. Although this kind of heat insulation pad can achieve a certain heat absorption function, its thermal conductivity is small, the response speed to heat change is slow, the energy storage capacity is small, and it may not be able to take away heat in time or the amount of heat taken away is limited when the temperature is too high, posing a large safety hazard; the heat insulation performance of the phase change material is average, heat conduction is likely to occur between two adjacent battery cells, the thermal stability of the phase change material is poor, and it is not very suitable for high-temperature occasions. In addition, the mechanical strength of the phase change material is low and the compression buffering performance is poor. When subjected to external forces, the heat insulation pad is easily damaged, the product quality is poor, and the service life is short, which cannot meet the current needs. Therefore, it is necessary to study a new technical solution to improve the current heat insulation pad. Summary of the Utility Model

[0005] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a heat insulation pad with a phase change material, which can effectively solve the problems of the existing heat insulation pad, such as small thermal conductivity, slow response speed to heat changes, small energy storage capacity, inability to take away heat in time or limited heat taken away when the temperature is too high, posing a greater potential safety hazard, general heat insulation performance, easy heat conduction between adjacent two battery cells, poor thermal stability, not being very suitable for high-temperature occasions, low mechanical strength and poor compression buffering performance, easy damage of the heat insulation pad when subjected to external forces, poor product quality and short service life.

[0006] To achieve the above object, the present utility model adopts the following technical solutions:

[0007] A heat insulation pad with a phase change material, comprising a heat insulation pad core material and a protective film; the heat insulation pad core material includes a phase change material, an upper ceramic aerogel felt and a lower ceramic aerogel felt, the phase change material includes a phase change core material and a copper foil film, the copper foil film is coated on the periphery of the phase change core material, the upper ceramic aerogel felt is laminated on the upper surface of the phase change material, and the lower ceramic aerogel felt is laminated on the lower surface of the phase change material; the protective film is coated on the periphery of the heat insulation pad core material.

[0008] As a preferred solution, the phase change core material is square, correspondingly, the phase change material, the upper ceramic aerogel felt, the lower ceramic aerogel felt and the heat insulation pad core material are also square.

[0009] As a preferred solution, the protective film has a "cross" structure, the protective film includes a main body part and a first extension part, a second extension part, a third extension part and a fourth extension part integrally formed and extending outward from the main body part and arranged in sequence, the main body part is attached to one surface of the heat insulation pad core material, the first extension part and the third extension part cover the two side edges of the heat insulation pad core material and bend inward and extend at the edge of the other surface of the heat insulation pad core material, and the first extension part and the third extension part are folded and overlapped with each other, the second extension part and the fourth extension part cover the other two side edges of the heat insulation pad core material, and bend inward and extend at the edge of the other surface of the heat insulation pad core material, and the second extension part and the fourth extension part are attached to the edge of the other surface of the heat insulation pad core material, so as to be able to completely cover the heat insulation pad core material with the protective film, effectively enhance the structural stability, prevent powder leakage of the ceramic aerogel felt, and improve the product quality.

[0010] As a preferred solution, four corner sealing edges are provided on the protective film, each corner sealing edge is connected between two adjacent extension parts, and the four corner sealing edges are respectively attached to the corresponding side edges of the other two side edges of the heat insulation pad core material. The above-mentioned second extension part and fourth extension part cover the four corner sealing edges and the other two side edges of the heat insulation pad core material, which can further prevent powder leakage of the ceramic aerogel felt and improve the product quality.

[0011] As a preferred solution, the protective film is a PI film, which has excellent high-temperature resistance, mechanical properties and insulation properties, and has good chemical stability and radiation resistance.

[0012] As a preferred solution, a self-adhesive film layer is provided on the inner side of the protective film, which can effectively enhance the adhesion, make the structure of the product more stable, and improve the quality of the product.

[0013] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0014] By providing that the heat insulation pad core material includes a phase change material, an upper ceramic aerogel felt and a lower ceramic aerogel felt, and cooperating with the phase change material including a phase change core material and a copper foil film, the copper foil film is coated on the periphery of the phase change core material, the upper ceramic aerogel felt is laminated on the upper surface of the phase change material, the lower ceramic aerogel felt is laminated on the lower surface of the phase change material, and the protective film is coated on the periphery of the heat insulation pad core material. The heat insulation pad with this structure can effectively enhance the heat insulation performance of the product, and it is not easy for heat conduction to occur between adjacent two battery cells, and can effectively block heat, improving the safety performance during use. Secondly, it can enhance the thermal stability of the product, making the product more suitable for high-temperature occasions. Moreover, it can effectively improve the mechanical strength and compression buffering performance of the product. When subjected to external forces, the heat insulation pad is not easy to be damaged, improving the quality of the product and extending the service life, meeting the existing needs.

[0015] To more clearly illustrate the structural features and functions of the present utility model, the following will combine the drawings and specific embodiments to elaborate on the present utility model in detail. Brief Description of the Drawings

[0016] Figure 1 is a three-dimensional structural schematic diagram of a preferred embodiment of the present utility model;

[0017] Figure 2 is an exploded view of a preferred embodiment of the present utility model;

[0018] Figure 3 is an exploded view of the phase change material in a preferred embodiment of the present utility model.

[0019] Description of the Reference Numerals in the Drawings:

[0020] 10. Heat insulation pad core material 11. Phase change material

[0021] 111. Phase change core material 112. Copper foil film

[0022] 12. Upper ceramic aerogel felt 13. Lower ceramic aerogel felt

[0023] 20. Protective film 21. Main body part

[0024] 22. First extension part 23. Second extension part

[0025] 24. Third extension part 25. Fourth extension part

[0026] 26. Corner edge sealing Detailed implementation manner

[0027] Please refer to Figures 1 to 3 as shown, which shows the specific structure of the preferred embodiment of the present utility model, including a heat insulation pad core material 10 and a protective film 20

[0028] The heat insulation pad core material 10 includes a phase change material 11, an upper ceramic aerogel felt 12 and a lower ceramic aerogel felt 13. The phase change material 11 includes a phase change core material 111 and a copper foil film 112. The phase change core material 111 generally includes materials such as hydrated salts and waxes. The copper foil film 112 is coated on the periphery of the phase change core material 111. The copper foil film 112 has excellent heat conduction performance and heat dissipation performance; the upper ceramic aerogel felt 12 is laminated on the upper surface of the phase change material 11, and the lower ceramic aerogel felt 13 is laminated on the lower surface of the phase change material 11. The ceramic aerogel felt is a lightweight material with excellent heat insulation performance and high temperature resistance, has good thermal stability, can maintain the stability of structure and performance under extreme temperature conditions, has stable chemical properties and is corrosion-resistant, and has high mechanical strength and good compression buffering performance; in this embodiment, the phase change core material 111 is square, correspondingly, the phase change material 11, the upper ceramic aerogel felt 12, the lower ceramic aerogel felt 13 and the heat insulation pad core material 10 are also square

[0029] The protective film 20 is wrapped around the periphery of the heat insulation pad core material 10; in this embodiment, the protective film 20 has a "cross" structure. The protective film 20 includes a main body portion 21 and a first extension portion 22, a second extension portion 23, a third extension portion 24, and a fourth extension portion 25 that are integrally formed and extended outward from the main body portion 21 and arranged in sequence. The main body portion 21 is attached to one surface of the heat insulation pad core material 10. The first extension portion 22 and the third extension portion 24 wrap around the two side edges of the heat insulation pad core material 10 and bend inward and extend at the edge of the other surface of the heat insulation pad core material 10, and the first extension portion 22 and the third extension portion 24 are folded and overlapped with each other. The second extension portion 23 and the fourth extension portion 25 wrap around the other two side edges of the heat insulation pad core material 10 and bend inward and extend at the edge of the other surface of the heat insulation pad core material 10. The second extension portion 23 and the fourth extension portion 25 are attached to the edge of the other surface of the heat insulation pad core material 10, enabling the heat insulation pad core material 10 to be completely wrapped by the protective film 20, effectively enhancing the structural stability, preventing the ceramic aerogel felt from leaking powder, and improving the product quality; four corner sealing edges 26 are provided on the protective film 20, and each corner sealing edge 26 is connected between two adjacent extension portions. The four corner sealing edges 26 are respectively attached to the corresponding side edges of the other two side edges of the heat insulation pad core material 10. The above-mentioned second extension portion 23 and the fourth extension portion 25 wrap around the four corner sealing edges 26 and the other two side edges of the heat insulation pad core material 10, which can further prevent the ceramic aerogel felt from leaking powder and improve the product quality; the protective film 20 is a PI film, and the PI film has excellent high-temperature resistance, mechanical properties, and insulation properties, and has good chemical stability and radiation resistance; a self-adhesive layer (not shown in the figure) is provided on the inner side surface of the protective film 20, effectively enhancing the adhesion force, making the structure of the product more stable, and improving the product quality.

[0030] The manufacturing and assembly process of this embodiment is described in detail as follows:

[0031] First, prepare the phase change core material 111 and the copper foil film 112, and wrap the copper foil film 112 around the periphery of the phase change core material 111 to form the phase change material 11; then, form the upper ceramic aerogel felt 12 and the lower ceramic aerogel felt 13, and cut the protective film 20; then, stack the upper ceramic aerogel felt 12 on the upper surface of the phase change material 11, and stack the lower ceramic aerogel felt 13 on the lower surface of the phase change material 11 to form the heat insulation pad core material 10; then, place the heat insulation pad core material 10 on the main body portion 21, and use the first extension portion 22 and the third extension portion 24 to wind and seal the two side edges of the heat insulation pad core material 10, and the first extension portion 22 and the third extension portion 24 are folded and overlapped with each other; then, press and attach the corner sealing edge 26 towards the other two side edges of the heat insulation pad core material 10; finally, use the second extension portion 23 and the fourth extension portion 25 to wind and seal the other two side edges of the heat insulation pad core material 10, and then take it for vacuum hot pressing and forming.

[0032] The design focus of the present utility model lies in:

[0033] By setting that the heat insulation pad core material includes a phase change material, an upper ceramic aerogel felt and a lower ceramic aerogel felt, and cooperating with the setting that the phase change material includes a phase change core material and a copper foil film, the copper foil film is coated on the periphery of the phase change core material, the upper ceramic aerogel felt is laminated on the upper surface of the phase change material, the lower ceramic aerogel felt is laminated on the lower surface of the phase change material, and the protective film is coated on the periphery of the heat insulation pad core material, the heat insulation pad with such a structure can effectively enhance the heat insulation performance of the product, it is not easy for heat conduction to occur between adjacent two battery cells, it can effectively block heat, improve the safety performance during use. Secondly, it can enhance the thermal stability of the product, making the product more suitable for high-temperature occasions. Moreover, it can effectively improve the mechanical strength and compression buffering performance of the product. When subjected to external forces, the heat insulation pad is not easy to be damaged, improving the quality of the product and prolonging the service life, meeting the existing requirements.

[0034] The above is only a preferred embodiment of the present utility model, and does not impose any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A thermal insulation pad having a phase change material, characterized in that: It includes a thermal insulation pad core material and a protective film; the thermal insulation pad core material includes a phase change material, an upper ceramic aerogel felt and a lower ceramic aerogel felt, the phase change material includes a phase change core material and a copper foil film, the copper foil film is coated on the periphery of the phase change core material, the upper ceramic aerogel felt is stacked on the upper surface of the phase change material, and the lower ceramic aerogel felt is stacked on the lower surface of the phase change material; the protective film is coated on the periphery of the thermal insulation pad core material.

2. The thermal insulation pad with phase change material according to claim 1, characterized in that: The phase change core material is square, and correspondingly, the phase change material, the upper ceramic aerogel felt, the lower ceramic aerogel felt and the thermal insulation pad core material are also square.

3. The thermal insulation pad with phase change material according to claim 2, characterized in that: The protective film is in a "cross" shaped structure, comprising a main body and a first extension portion, a second extension portion, a third extension portion and a fourth extension portion which are integrally formed with the main body and extend outward and are arranged in sequence, the main body is in contact with one surface of the thermal insulation pad core material, the first extension portion and the third extension portion cover two side edges of the thermal insulation pad core material and are bent inwardly and extended at the edge of the other surface of the thermal insulation pad core material, and the first extension portion and the third extension portion are folded and overlapped with each other, the second extension portion and the fourth extension portion cover the other two side edges of the thermal insulation pad core material and are bent inwardly and extended at the edge of the other surface of the thermal insulation pad core material, and the second extension portion and the fourth extension portion are in contact with the edge of the other surface of the thermal insulation pad core material.

4. The thermal insulation pad with phase change material according to claim 3, characterized in that: The protective film is provided with four corner seals, each of which is connected between two adjacent extension parts, and the four corner seals are respectively fitted with the corresponding side edges of the other two sides of the thermal insulation pad core material, and the second extension part and the fourth extension part cover the four corner seals and the other two sides of the thermal insulation pad core material.

5. The thermal insulation pad with phase change material according to claim 1, characterized in that: The protective film is a PI film.

6. The thermal insulation pad with phase change material according to claim 1, characterized in that: The inner side of the protective film is provided with a self-adhesive film layer.

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