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UV thermal expansion coating liquid composition and lithium battery thermal runaway protection patch

A composition and thermal expansion technology, applied in secondary batteries, coatings, circuits, etc., can solve problems such as inability to effectively delay thermal diffusion time, surrounding material fires, and fragments that are easy to hurt people, so as to improve photocuring efficiency and adhesion sexual effect

Inactive Publication Date: 2022-04-29
江苏新澄瑞材料科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The fragments of traditional steel-cased and aluminum-cased batteries can easily hurt people after the explosion. The ejected battery contents are likely to ignite surrounding materials and cause a greater fire. How to prevent the fire and explosion caused by thermal runaway is the application of lithium batteries. Unavoidable problems of new energy vehicles and energy storage power stations with storage media
[0003] At present, the fireproof materials of new energy vehicle battery packs are mainly fireproof felt materials, such as mica board, ultra-fine glass wool, high-silica cotton felt, etc. When the battery thermal runaway occurs, the fireproof felt material can effectively isolate and control the direction of the fire , but the thickness of the fireproof felt material is thin, and the heat insulation is limited, which cannot effectively delay the heat diffusion time, which is not good for fire rescue or crew cabin escape

Method used

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Embodiment Construction

[0032] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] A kind of UV thermal expansion coating fluid composition, according to mass component, comprises following component content:

[0034] 25-55 parts of epoxy acrylate oligomer, wherein the epoxy acrylate oligomer is a modified epoxy acrylate oligomer with two functionalities;

[0035] 15-25 parts of photocurable monomers, of which photocurable monomers are trimethylolpropane triacrylate (TMPTA), ethoxylated trimethylolpropane triacrylate (TMP(EO)TA), propoxy Trimethylolpropane Triacrylate (TMP(PO)TA), Pentaerythritol Triacryla...

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Abstract

The invention relates to the technical field of materials and lithium batteries, in particular to a UV thermal expansion coating liquid composition and a lithium battery thermal runaway protection patch, and the UV thermal expansion coating liquid composition is prepared by taking free radical curing type resin as a matrix, preferably selecting a proper intumescent flame retardant, and matching with a photoinitiator, a thermal initiator and other auxiliaries. The invention also provides a patch formed by taking the coating liquid composition and glass fibers with a certain thickness as reinforcing materials, the patch is used for replacing a fireproof felt for lithium battery thermal runaway protection at present, not only has the flame retardant effect of the fireproof felt, but also can foam and expand in volume at high temperature or flame, and an expansion layer has dual effects of heat insulation and flame retardance. The patch is moderate in hardness, convenient to lay and simple to operate, can be cured within 10 minutes through ultraviolet single-side irradiation, can be formed at a time, and saves the construction period.

Description

technical field [0001] The invention relates to the technical field of materials and lithium batteries, in particular to a UV thermal expansion coating liquid composition and a lithium battery thermal runaway protective patch. Background technique [0002] Lithium-ion batteries are commonly used in modern electric vehicle batteries. The lithium batteries used in electric vehicles are mainly cylindrical 18650 batteries and flexible polymer batteries. With the development of the new energy automobile industry, people's demand for lithium battery mileage is getting higher and higher. Under a certain mass, increasing the driving range of electric vehicles requires increasing the energy density of the lithium battery itself. With the increase of battery energy density, it is more and more difficult to ensure the thermal stability of batteries, because the occurrence of fire and explosion accidents caused by thermal runaway is increasing. Therefore, research on the safety and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/10C09D5/18A62C3/16H01M10/625H01M10/658
CPCC09D163/10C09D5/185H01M10/625H01M10/658A62C3/16
Inventor 齐竹竹郭秋泉
Owner 江苏新澄瑞材料科技有限公司
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