A fireproof thermal insulation pad for lithium ion batteries and a preparation method thereof

By combining microporous nanoplates and fire-resistant heat-absorbing felt, the problem of existing super insulation materials being unable to be used on a large scale at high temperatures is solved, providing a lithium-ion battery heat insulation pad with low thermal conductivity and good fire resistance, suitable for the safety protection of lithium-ion batteries.

CN117246001BActive Publication Date: 2026-06-02ANYI TAOJI NEW MATERIAL TECH (ZIBO) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANYI TAOJI NEW MATERIAL TECH (ZIBO) CO LTD
Filing Date
2023-09-21
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing super insulation materials cannot meet the requirements for large-scale production and application under high-temperature conditions. In particular, aerogel composite materials are complex to produce and costly, micro/nanoporous materials have limited operating temperatures, and nano-alumina powder is costly and unstable, making it unable to provide effective insulation at high temperatures.

Method used

The structure combines microporous nanoplates and fireproof heat-absorbing felt. The microporous nanoplates are made of microporous nano-alumina, nano-silica, light-blocking agent and alumina fiber, while the fireproof heat-absorbing felt is made of alumina fiber, inorganic heat-absorbing phase change filler and organic polymer adhesive. An insulating layer is set on the outside, and the fireproof heat-insulating pad is formed by layer bonding.

Benefits of technology

It achieves low thermal conductivity and good fire resistance at high temperatures, making it suitable for large-scale production. It also possesses fireproof, heat insulation, water-proof, and insulating properties, making it suitable for the safety protection of lithium-ion batteries.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a fireproof and heat insulation pad for a lithium ion battery and a preparation method, and the fireproof and heat insulation pad is a multilayer gradient heat insulation composite material which is made of microporous nanometer plates, fireproof and heat absorption felt and an insulation layer. The microporous nanometer plates are made of micrometer and nanometer aluminum oxide, nanometer silicon dioxide, a light shielding agent and aluminum oxide fibers, and have the characteristics of strong radiation heat resistance, low thermal conductivity in high and low temperature conditions and good fireproof performance. The fireproof and heat absorption felt is heat absorption felt or ceramic fiber felt which is prepared from aluminum oxide fibers, inorganic heat absorption phase change fillers and organic polymer adhesives, and has unique heat absorption performance and high temperature and low thermal conductivity stability and better fireproof performance. The insulation layer can make the fireproof and heat insulation pad have insulation performance and prevent the occurrence of electric leakage between each lithium ion cell. Therefore, the fireproof and heat insulation pad has the performances of fireproof, heat insulation, water penetration prevention and insulation, and has simple preparation process and is suitable for large-scale production.
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