Nano-porous heat insulation sheet of energy storage battery

Abstract

The utility model relates to a nano porous heat-resisting sheet for an energy storage battery, which belongs to the technical field of energy storage batteries and comprises a composite heat-resisting sheet, the composite heat-resisting sheet comprises a middle nano heat-resisting sheet and composite functional layers on two sides, nano particles are uniformly distributed in the nano heat-resisting sheet, nano micropores are arranged on the surface of the nano heat-resisting sheet, and the composite functional layers are arranged on two sides of the nano heat-resisting sheet. The nanometer micropores comprise small holes located in one side of the nanometer heat insulation sheet and large holes located in the other side of the nanometer heat insulation sheet, and the small holes and the large holes are communicated through variable-diameter holes. According to the nano porous heat insulation sheet for the energy storage battery, the nano heat insulation sheet composed of the nano cellulose is arranged in the composite heat insulation sheet, the nano particles are arranged in the nano heat insulation sheet, infrared rays are scattered and reflected through the nano particles, and heat transfer in a radiation mode is reduced; and heat is reflected, scattered and conducted in the nanometer micropores for many times, so that the heat transfer efficiency is reduced, and the heat insulation effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage battery, specifically to a kind of energy storage battery nano porous heat insulation sheet. BACKGROUND

[0002] The energy storage battery heat insulation sheet is a key component used in the energy storage battery system to prevent battery overheating and improve safety and stability. During the charging and discharging process of the energy storage battery, heat is generated. If the heat is not dissipated in time, it may cause the battery temperature to be too high, which may lead to thermal runaway. The heat insulation sheet can effectively block the propagation of heat within the battery pack, reducing the risk of local overheating of the battery, thereby preventing the occurrence of thermal runaway. Excessive temperature can accelerate the reaction speed of the chemical substances inside the battery, causing the battery capacity to decay rapidly, affecting the service life of the battery. By using the heat insulation sheet to keep the battery working within an appropriate temperature range, the aging rate of the battery can be slowed down, and the service life of the battery can be extended. In the energy storage battery system, safety is of utmost importance. The use of heat insulation sheet can reduce the risk of fire or explosion of the battery pack due to overheating, improving the safety of the entire energy storage system.

[0003] The utility model patent with publication number CN214821560U discloses a battery waterproof heat insulation sheet, which comprises a heat insulation sheet body and a high-temperature-resistant waterproof sleeve wrapped outside the heat insulation sheet body. The heat insulation sheet body comprises a heat insulation layer and a fire-retardant layer on both sides of the heat insulation layer. The high-temperature-resistant waterproof sleeve is formed by vacuum wrapping a high-temperature-resistant film outside the heat insulation sheet body. The utility model can effectively prevent the heat insulation sheet from absorbing water and reducing its strength, and avoid excessive moisture in the battery assembly, which may damage the battery and even cause safety accidents.

[0004] However, the battery waterproof heat insulation sheet uses multiple heat insulation layers for heat insulation, and the heat insulation material is single, which results in poor heat insulation efficiency. Therefore, the energy storage battery nano porous heat insulation sheet is proposed to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the utility model provides an energy storage battery nano porous heat insulation sheet, which has the advantages of improving heat insulation effect through nano porous structure, and solves the problem of common battery waterproof heat insulation sheet using single heat insulation material for heat insulation, which results in poor heat insulation efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0007] An energy storage battery nano porous heat insulation sheet comprises a composite heat insulation sheet, which comprises a nano heat insulation sheet in the middle and a composite functional layer on both sides.

[0008] The nanometer thermal insulation sheet is internally uniformly distributed with nanoparticles, and the surface of the nanometer thermal insulation sheet is provided with nanometer micropores.

[0009] The nanometer micropores include small holes on one side of the nanometer thermal insulation sheet and large holes on the other side of the nanometer thermal insulation sheet, and the small holes and the large holes are connected through variable-diameter holes.

[0010] Further, the nanometer thermal insulation sheet is composed of nanocellulose, and the nanoparticles are composed of nanosilica and nanoalumina.

[0011] Further, the composite functional layer includes an electrically insulating layer attached to both sides of the nanometer thermal insulation sheet, and the electrically insulating layer is composed of a polyimide film.

[0012] Further, the composite functional layer further includes a flame-retardant layer attached to one side of the electrically insulating layer.

[0013] Further, the composite functional layer further includes a waterproof coating layer attached to one side of the flame-retardant layer.

[0014] Further, the two composite thermal insulation sheets are attached with heat-conducting sheets on the sides away from each other.

[0015] Further, the sides away from each other of the two heat-conducting sheets are fixedly installed with energy storage batteries, and the small holes are located on the side of the nanometer thermal insulation sheet close to the energy storage batteries.

[0016] Compared with the prior art, the utility model provides a kind of nanometer porous thermal insulation sheet of energy storage battery, with following beneficial effects:

[0017] 1、the nanometer porous thermal insulation sheet of energy storage battery, by setting the nanometer thermal insulation sheet of nanocellulose in composite thermal insulation sheet, by setting nanoparticle in nanometer thermal insulation sheet, by nanoparticle scattering and reflecting infrared, reduce heat transfer by radiation, by setting nanometer micropore, so that heat is reflected, scattered and conducted in nanometer micropore multiple times, to reduce the transmission efficiency of heat, increase the heat insulation effect, solve the common battery waterproof thermal insulation sheet, heat insulation is carried out by heat insulation layer, and the problem of single heat insulation material and poor heat insulation efficiency.

[0018] 2、the nanometer porous thermal insulation sheet of energy storage battery, by setting nanometer micropore as small hole and large hole changing inner diameter, small hole close to battery, can effectively block the heat generated by battery to outside, and the pore away from battery side gradually increases, is favorable to the diffusion and emission of heat, so that thermal insulation sheet can improve heat dissipation efficiency while ensuring heat insulation performance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the installation structure diagram of the utility model composite thermal insulation sheet.

[0020] Figure 2 The utility model discloses a composite heat insulation sheet three-dimensional view;

[0021] Figure 3 The utility model discloses a composite heat insulation sheet section view;

[0022] Figure 4 The utility model discloses a nanometer heat insulation sheet section view.

[0023] In the drawing: 1, composite heat insulation sheet;11, nanometer heat insulation sheet;111, nano particle;12, composite function layer;121, electric insulating layer;122, fire -retardant layer;123, waterproof coating;2, nanometer micropore;21, small hole;22, variable diameter hole;23, big hole;3, heat conduction sheet;4, energy storage battery. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the range protected by the utility model.

[0025] Please refer to Figures 1 to 4 The energy storage battery nanometer porous heat insulation sheet in the embodiment includes a composite heat insulation sheet 1, and the composite heat insulation sheet 1 includes a nanometer heat insulation sheet 11 in the middle and composite function layers 12 on both sides.

[0026] The nanometer heat insulation sheet 11 is uniformly distributed with nano particles 111 inside, and the nanometer heat insulation sheet 11 is provided with nanometer micropores 2 on the surface. When heat radiation passes through the nanometer heat insulation sheet 11, the nano particles 111 in it scatter and reflect the heat radiation, reduce the heat transfer by radiation, and reduce the heat conduction efficiency by multiple reflection, scattering and conduction inside the nanometer micropores 2, thereby increasing the heat insulation effect.

[0027] Secondly, the nanometer heat insulation sheet 11 is composed of nanocellulose, and the nano particles 111 are composed of nanosilica and nanoalumina. The nanosilica can scatter and reflect infrared rays, reduce the heat transfer by radiation, and the nanoalumina has high thermal stability and chemical stability, which can enhance the mechanical properties and high temperature resistance of the heat insulation sheet.

[0028] Specifically, the nano particles 111 scatter and reflect the heat radiation, reduce the heat transfer by radiation, and at the same time, the heat is reflected, scattered and conducted multiple times inside the nanometer micropores 2, thereby reducing the heat conduction efficiency and increasing the heat insulation effect.

[0029] Please refer to Figure 3 In the embodiment, the composite functional layer 12 comprises an electrically insulating layer 121 attached to both sides of the nanometer thermal insulation sheet 11, and the electrically insulating layer 121 is composed of a polyimide film. The polyimide film has excellent mechanical properties, high-temperature resistance and electrical insulation properties, which improves the overall strength of the nanometer thermal insulation sheet 11 and the performance of resisting external force impact, and prevents the nanometer thermal insulation sheet 11 from electric leakage during use.

[0030] The composite functional layer 12 further comprises a fire-retardant layer 122 attached to one side of the electrically insulating layer 121.

[0031] Secondly, the composite functional layer 12 further comprises a waterproof coating 123 attached to one side of the fire-retardant layer 122. The waterproof coating 123 prevents moisture intrusion and avoids dampness.

[0032] Please refer to Figure 1 and Figure 4 In the embodiment, the two composite thermal insulation sheets 1 are attached with a heat-conducting sheet 3 between them, and the two composite thermal insulation sheets 1 are attached with a heat-conducting sheet 3 on the side away from each other.

[0033] The nanometer micropore 2 comprises a small hole 21 on one side of the nanometer thermal insulation sheet 11 and a large hole 23 on the other side of the nanometer thermal insulation sheet 11, and the small hole 21 and the large hole 23 are connected through a variable-diameter hole 22.

[0034] Secondly, the two heat-conducting sheets 3 are fixedly installed with an energy storage battery 4 on the side away from each other, and the small hole 21 is located on the side of the nanometer thermal insulation sheet 11 close to the energy storage battery 4. The energy storage battery 4 generates heat, which is first conducted outward through the two heat-conducting sheets 3, then insulated by the nanometer thermal insulation sheet 11, and prevented from being transmitted to the surrounding energy storage battery 4. After the heat passes through the nanometer thermal insulation sheet 11, the heat is conducted outward through the middle heat-conducting sheet 3, further preventing heat transmission.

[0035] The working principle of the above embodiment is that the energy storage battery 4 generates heat, which is first conducted outward through the two heat-conducting sheets 3, then insulated by the nanometer thermal insulation sheet 11, and the heat radiation is scattered and reflected on the nanometer particles 111, and is reflected, scattered and conducted multiple times inside the nanometer micropore 2, preventing heat from being transmitted to the surrounding energy storage battery 4. After the heat passes through the nanometer thermal insulation sheet 11, the heat is conducted outward through the middle heat-conducting sheet 3.

[0036] The installation method, connection method or setting method disclosed in the embodiment are all common mechanical connection methods, and any method that can achieve the beneficial effects can be implemented.

[0037] It should be noted that, in this article, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] It should be noted that, in this article, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0039] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A nanoporous heat insulation sheet for energy storage batteries, comprising a composite heat insulation sheet (1), characterized in that: The composite heat insulation sheet (1) includes a central nano heat insulation sheet (11) and two composite functional layers (12) on both sides; The interior of the nano heat insulation sheet (11) is uniformly distributed with nanoparticles (111), and the surface of the nano heat insulation sheet (11) is provided with nano-micropores (2); The nanopores (2) include a small pore (21) on one side of the nano heat insulation sheet (11) and a large pore (23) on the other side of the nano heat insulation sheet (11), and the small pore (21) and the large pore (23) are connected by a variable diameter hole (22).

2. The nanoporous heat insulation sheet for energy storage batteries according to claim 1, characterized in that: The nano-insulation sheet (11) is composed of nanocellulose, and the nanoparticles (111) are composed of nano-silica and nano-alumina.

3. The nanoporous heat insulation sheet for energy storage batteries according to claim 1, characterized in that: The composite functional layer (12) includes an electrical insulating layer (121) attached to both sides of the nano heat insulation sheet (11), and the electrical insulating layer (121) is composed of a polyimide film.

4. The nanoporous heat insulation sheet for energy storage batteries according to claim 3, characterized in that: The composite functional layer (12) also includes a flame-retardant layer (122) attached to one side of the electrical insulation layer (121).

5. The nanoporous heat insulation sheet for energy storage batteries according to claim 4, characterized in that: The composite functional layer (12) also includes a waterproof coating (123) attached to one side of the flame retardant layer (122).

6. The nanoporous heat insulation sheet for energy storage batteries according to claim 1, characterized in that: A heat-conducting sheet (3) is attached between the two composite heat insulation sheets (1), and a heat-conducting sheet (3) is attached to the side of the two composite heat insulation sheets (1) that is far apart from each other.

7. The nanoporous heat insulation sheet for energy storage batteries according to claim 6, characterized in that: A storage battery (4) is fixedly installed on the side of the heat-conducting sheets (3) that are far apart from each other, and a small hole (21) is located on the side of the nano heat insulation sheet (11) that is close to the storage battery (4).

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