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Battery protective layer, preparation method and application in battery components

A technology for battery components and protective layers, which is applied in the field of preparation and battery protective layers, can solve problems such as restricting the rapid development of new energy vehicles, and achieve the effects of avoiding fire or explosion, improving safety, and inhibiting combustion diffusion

Active Publication Date: 2021-11-09
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in recent years, the frequent occurrence of power battery safety accidents has also made the power battery safety problem more and more prominent, and the power battery safety problem has greatly restricted the rapid development of new energy vehicles.

Method used

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  • Battery protective layer, preparation method and application in battery components

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preparation example Construction

[0030] Next, the preparation method of the battery protection layer according to the present invention will be described.

[0031] The preparation method of the battery protection layer of the present invention comprises the steps: (1) dissolving the epoxy resin matrix in a solvent to obtain an epoxy resin matrix solution; (2) then adding reinforcing fillers and flame retardants to the epoxy resin matrix solution , mix evenly, then add silane coupling agent, mix evenly again, add epoxy resin curing agent and stir evenly to obtain a mixed solution; (3) fully impregnate the mixed solution into the fireproof cloth, then cover the fireproof cloth on the main material, and let it stand at room temperature Place or heat treatment to cure the epoxy resin matrix in the mixed solution to form a thermosetting resin layer, and complete the preparation of the battery protective layer.

[0032] In the preparation method of the battery protective layer, the type of solvent is not particular...

Embodiment 1

[0043] Dissolve 40 parts by mass of silicone-modified epoxy resin in acetone, then add 25 parts by mass of glass fiber reinforced filler and 10 parts by mass of phosphate flame retardant, mix well and then add 0.5 parts by mass of silane coupling agent γ-ammonia Propyl triethoxysilane, mix again and add 25 parts by mass of imidazole curing agent, stir evenly to obtain a mixed solution; brush the mixed solution on the surface of the glass fiber cloth and make the mixed solution fully impregnate the glass fiber cloth, and then put The glass fiber cloth is covered on the inner side of the upper cover of the battery pack, and heated and cured at 80°C for 2 hours to form a battery protective layer with a thickness of 2mm.

Embodiment 2

[0045] Dissolve 80 parts by mass of phenolic modified epoxy resin in diethylene glycol monomethyl ether, then add 40 parts by mass of carbon fiber reinforced filler and 25 parts by mass of ammonium polyphosphate flame retardant, mix well and then add 1 part by mass of silane Joint agent γ-(2,3-glycidoxy) propyltrimethoxysilane, mix again evenly, add 40 parts by mass of anhydride curing agent, stir evenly to obtain a mixed solution; brush the mixed solution on the basalt fiber cloth and fully impregnate the basalt fiber cloth with the mixed liquid, then cover the inner side of the battery pack cover with the basalt fiber cloth, and heat and cure at 100°C for 6 hours to form a battery protective layer with a thickness of 2mm.

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Abstract

The invention provides a battery protective layer, a preparation method and its application in battery components. The battery protective layer includes a fireproof cloth and a functional layer arranged on the fireproof cloth, and the functional layer is mainly composed of epoxy A thermosetting resin layer formed by curing the resin matrix, epoxy resin curing agent, reinforcing filler, flame retardant and silane coupling agent. The battery protection layer of the invention has high strength, ablation resistance, heat shock resistance and flame retardancy, can withstand explosion impact, block sparks and inhibit combustion diffusion, effectively avoid battery fire or explosion, and improve battery safety during use.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery protective layer, a preparation method and its application in battery components. Background technique [0002] As the core component of new energy vehicles, power batteries have a key impact on the performance of new energy vehicles. With the development of the new energy vehicle industry, the market has an urgent demand for power battery performance such as high power output and fast charging and discharging, but this also puts forward more stringent requirements for the safety performance of the power battery during use. Especially in recent years, the frequent occurrence of power battery safety accidents has also made the power battery safety problem more and more prominent, and the power battery safety problem has greatly restricted the rapid development of new energy vehicles. [0003] The safety issue of power batteries is closely related to thermal runaway in essence. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/38B32B33/00H01M50/24H01M10/658
CPCB32B27/06B32B27/38B32B33/00B32B2307/3065H01M50/24Y02E60/10
Inventor 陈世龙陈小波沈聃
Owner CONTEMPORARY AMPEREX TECH CO
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