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Composite thermal insulation material integrally formed with battery shell and preparation process of composite thermal insulation material

A technology of composite thermal insulation materials and battery shells, which is applied in battery pack components, circuits, ceramic products, etc., can solve the problems of insufficient performance and utilization of thermal insulation and thermal insulation.

Pending Publication Date: 2022-02-01
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The problem to be solved by the present invention is to provide a composite thermal insulation material integrally formed with the battery casing and its preparation process, which can effectively solve the problem that the existing technology is difficult to meet the requirements of good flexibility for the thermal battery thermal insulation lining, and airgel is usually used as Additives for thermal insulation materials, their good thermal insulation properties have not been fully developed and utilized

Method used

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  • Composite thermal insulation material integrally formed with battery shell and preparation process of composite thermal insulation material

Examples

Experimental program
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Effect test

Embodiment 1

[0052] S1: Prefabricated body film formation: cross-fix the inorganic fibers into a fibrous body, then wrap the fiber body along the outer surface of the stack model rod, and then insert it into the battery case to obtain a prefabricated body; among them,

[0053] The stack model rod adopts a temperature-resistant stack model rod with the same diameter as the assembled stack, wraps a layer of insulating mica on the outer surface of the stack model rod, and uses high-temperature insulating tape to fix the insulating mica on the stack model rod The outer surface;

[0054] The selection of inorganic fibers is consistent with the above, and will not be repeated here. The fiber diameter of the inorganic fibers is 30nm, and the length is 10μm; the quality of the inorganic fibers accounts for 50% of the mass of the composite thermal insulation material;

[0055] Stack multiple layers of inorganic fibers neatly, cross-fix the inorganic fibers by acupuncture to form a fiber body, wrap ...

Embodiment 2

[0068] S1: Prefabricated body film formation: cross-fix the inorganic fibers into a fibrous body, then wrap the fiber body along the outer surface of the stack model rod, and then insert it into the battery case to obtain a prefabricated body; among them,

[0069] The stack model rod adopts a temperature-resistant stack model rod with the same diameter as the assembled stack, wraps a layer of insulating mica on the outer surface of the stack model rod, and uses high-temperature insulating tape to fix the insulating mica on the stack model rod The outer surface;

[0070] The selection of inorganic fibers is consistent with the above, and will not be repeated here. The fiber diameter of the inorganic fibers is 30nm, and the length is 10μm; the quality of the inorganic fibers accounts for 50% of the mass of the composite thermal insulation material;

[0071] Stack multiple layers of inorganic fibers neatly, cross-fix the inorganic fibers by acupuncture to form a fiber body, wrap ...

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Abstract

The invention provides a composite thermal insulation material integrally formed with a battery shell, wherein the composite thermal insulation material comprises an aerogel material and inorganic fibers, the mass ratio of the aerogel material is 0.5%-60%, and the mass ratio of the inorganic fibers is 40%-99.5%. The invention has the following beneficial effects: the aerogel has low thermal conductivity due to the unique network structure and high porosity of the aerogel, but the internal pore size distribution of the aerogel is non-uniform, the pressure difference between pores is large, and the internal structure is easy to deform and crack; in this way, through integral forming, the auxiliary supporting effect of the additive can be fully utilized, and the macroscopic deformation of the aerogel material in the thermal battery assembly process is avoided, so that the unique pore structure in the aerogel is maintained, and the thermal insulation performance of the aerogel is fully exerted.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a composite thermal insulation material integrally formed with a battery casing and a preparation process thereof. Background technique [0002] A thermal battery is a primary battery that uses high-temperature molten salt as an electrolyte. When the heat provided by the internal heating material induces the internal temperature to reach the melting point of the molten salt, the battery is activated to work, and then the thermal insulation material is used to suppress the heat loss inside the battery, making the internal heat of the battery The temperature is kept as much as possible above the melting point of the molten salt, so that the thermal battery can work for a long time with high energy output. [0003] Common thermal battery insulation materials are materials such as asbestos, inorganic fiber paper and composite ceramic paper. Asbestos and inorgan...

Claims

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Application Information

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IPC IPC(8): C04B30/02C04B38/00H01M6/36H01M50/117H01M50/121
CPCC04B30/02H01M6/36H01M50/117H01M50/121C04B2111/00853C04B14/064C04B14/303C04B14/306C04B14/308C04B14/302C04B14/028C04B14/4693C04B14/386C04B14/42C04B14/4631C04B14/4656C04B14/4625C04B14/4637C04B14/305C04B22/085C04B38/0045
Inventor 刘钰汪东东李清馨白鑫涛王岩
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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