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Thermal runaway protection low-thermal-conductivity mica composite part applied between battery cells and preparation method of thermal runaway protection low-thermal-conductivity mica composite part

A technology with low thermal conductivity and thermal runaway, which is applied in electrical components, battery pack parts, chemical instruments and methods, etc. It can solve problems affecting the thermal runaway protection performance of the battery module, high thermal conductivity, and poor thermal insulation performance of the battery cell. , to achieve good thermal runaway protection performance, good heat insulation and flame retardant performance, and the effect of quality assurance

Active Publication Date: 2022-04-15
浙江荣泰电工器材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high thermal conductivity and relatively poor thermal insulation performance between cells in the related technology, which affects the thermal runaway protection performance of the pool module, this application provides a thermal runaway protection applied between cells Low thermal conductivity mica composite part and preparation method thereof

Method used

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  • Thermal runaway protection low-thermal-conductivity mica composite part applied between battery cells and preparation method of thermal runaway protection low-thermal-conductivity mica composite part
  • Thermal runaway protection low-thermal-conductivity mica composite part applied between battery cells and preparation method of thermal runaway protection low-thermal-conductivity mica composite part
  • Thermal runaway protection low-thermal-conductivity mica composite part applied between battery cells and preparation method of thermal runaway protection low-thermal-conductivity mica composite part

Examples

Experimental program
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Effect test

preparation example 1

[0049] Preparation of synthetic fluorphlogopite aggregates: Grinding and sieving synthetic fluorphlogopite, sieving with a 5000-mesh sieve, the resulting sieved product is <2.6 micron synthetic fluorphlogopite, using a 1340-mesh sieve, and the resulting sieved The sieve is 2.6-10 micron synthetic fluorophlogopite, which is sieved by 500 mesh, and the obtained sieve is 10-25 micron synthetic fluorphlogopite, which is sieved by 400 mesh, and the obtained sieve is 25-38 Micron synthetic fluorophlogopite, sieved by 270 mesh, the sieved product is 38-53 micron synthetic fluorophlogopite, sieved by 180 mesh, and the obtained sieve is 53-80 micron synthetic fluorophlogopite , the sieve retentate can be ground and sieved again; according to 5% < 2.6 micron synthetic fluorophlogopite, 10% 2.6-10 micron synthetic fluorophlogopite, 20% 10-25 micron synthetic fluorogold Mica, 50% 25-38 micron synthetic fluorphlogopite, 10% 38-53 micron synthetic fluorphlogopite, 5% 53-80 micron synthetic ...

preparation example 2

[0059] The difference between Preparation Example 2 and Preparation Example 1 is that the surface modified composite mica composition is composed of 40 parts of synthetic fluorophlogopite aggregates, 50 parts of phlogopite aggregates, 20 parts of muscovite aggregates, 10 parts of Prepared from isopropyl tris(dioctyl phosphate acyloxy) titanate.

preparation example 3

[0061] The difference between Preparation Example 3 and Preparation Example 1 is that the surface modified composite mica composition is composed of 50 parts of synthetic fluorophlogopite aggregates, 50 parts of phlogopite aggregates, 20 parts of muscovite aggregates, 10 parts of Prepared from isopropyl tris(dioctyl phosphate acyloxy) titanate.

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Abstract

The invention relates to the technical field of mica composite materials, in particular to a thermal runaway protection low-thermal-conductivity mica composite part applied between battery cells and a preparation method of the thermal runaway protection low-thermal-conductivity mica composite part. The invention relates to a low-thermal-conductivity mica composite part with thermal runaway protection applied between battery cells. The low-thermal-conductivity mica composite part comprises a porous thermal insulation material layer serving as a core layer and composite mica sheets compounded on the upper surface and the lower surface of the porous thermal insulation material layer, reinforced gridding cloth is compounded on the surface of the composite mica sheet through hot pressing; the composite mica sheet is prepared from the following raw materials: a surface-modified compound mica composition, a diluting solvent, a toughening filler, a low-thermal-conductivity filler, organic silicon resin and a coupling agent, the toughening filler is a mixture of aromatic polyamide fibers, alumina fibers and silicon carbide whiskers; the low-thermal-conductivity filler is a mixture of fluorocarbon resin powder, inorganic hollow microspheres and zirconium oxide. The composite material has good thermal insulation and flame retardant properties, can ensure good thermal runaway protection performance when being used between battery cells, and can improve the use safety of a new energy automobile battery.

Description

technical field [0001] The present application relates to the technical field of mica composite materials, in particular to a mica composite with low thermal conductivity applied between electric cores for thermal runaway protection and a preparation method thereof. Background technique [0002] Thermal runaway protection between cells in new energy vehicle battery modules is one of the key factors affecting vehicle safety. At present, it is usually necessary to arrange a flame-retardant and heat-insulating composite material with good insulation and low thermal conductivity between the cells. Flame retardant and heat insulation composite materials are usually selected from mica materials. Mica materials have the advantages of high electrical insulation, large dielectric constant, low loss, high dielectric strength, and high chemical stability. Runaway protection material. Therefore, the quality of mica material is one of the key factors that directly affect the advanced l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/593H01M10/625H01M10/658C08G77/44C04B26/32C04B14/20B32B19/02B32B17/02B32B17/06B32B9/00B32B9/04B32B33/00B32B37/06B32B37/10B32B37/00A62C3/16
Inventor 金万洪黄静杨鸣
Owner 浙江荣泰电工器材股份有限公司
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