A low thermal conductivity mica composite for thermal runaway protection applied between batteries

A low thermal conductivity, thermal runaway technology, applied in electrical components, battery pack components, circuits, etc., can solve the problems of poor thermal insulation performance of cells, high thermal conductivity, affecting the thermal runaway protection performance of battery modules, etc. Heat insulation and flame retardant performance, improve the safety of use, and improve the effect of thermal runaway protection performance

Active Publication Date: 2022-06-17
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

Method used

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  • A low thermal conductivity mica composite for thermal runaway protection applied between batteries
  • A low thermal conductivity mica composite for thermal runaway protection applied between batteries
  • A low thermal conductivity mica composite for thermal runaway protection applied between batteries

Examples

Experimental program
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Effect test

preparation example 1

[0049] Preparation of synthetic fluorophlogopite aggregate: grinding and sieving the synthetic fluorophlogopite, and sieving with a 5000-mesh sieve; The sieved material is synthetic fluorophlogopite of 2.6-10 microns, sieved with a 500-mesh mesh, and the obtained sieved material is a synthetic fluorophlogopite of 10-25 microns, which is sieved with a 400-mesh mesh, and the obtained sieved material is 25-38 Micron synthetic fluorophlogopite, sieved with 270 mesh, the obtained sieved product is 38-53 micron synthetic fluorophlogopite, sieved with 180 mesh, and the obtained sieved product is 53-80 micron synthetic fluorophlogopite , the screen 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 fluorophlogopite The ratio of mica, 25-38 micron synthetic fluorophlogopite, 10% 38-53 micron synthetic fluorophlogopite, and 5% 53-80 micron synthetic fluorophlogopite wa...

preparation example 2

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

preparation example 3

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

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Abstract

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. A low-thermal-conduction mica composite with thermal runaway protection applied between batteries, including a porous heat-insulating material layer as a core layer and a composite mica sheet compounded on the upper and lower surfaces of the porous heat-insulating material layer; the surface heat of the composite mica sheet Pressed composite with reinforced grid cloth; composite mica sheet is prepared from the following raw materials: surface modified composite mica composition, dilution solvent, toughening filler, low thermal conductivity filler, silicone resin, coupling agent; toughening The filler is a mixture of aromatic polyamide fiber filaments, alumina fibers, and silicon carbide whiskers; the low thermal conductivity filler is a mixture of fluorocarbon resin powder, inorganic hollow microspheres, and zirconia. The application has good heat insulation and flame retardant performance, and can ensure good thermal runaway protection performance when used between batteries, and can improve the safety of new energy vehicle batteries.

Description

technical field [0001] The present application relates to the technical field of mica composite materials, and in particular, to a low thermal conductivity mica composite part applied between battery cells for thermal runaway protection. Background technique [0002] Thermal runaway protection between cells in a battery module of a new energy vehicle is one of the key factors to measure 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. The flame retardant and thermal insulation composite material is usually selected from mica material. Mica material has the advantages of high electrical insulation, large dielectric constant, low loss, high dielectric strength and high chemical stability. Loss of control protection material. Therefore, the quality of mica material is one of the key factors that directly affects the advanced level of tech...

Claims

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Application Information

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Patent Type & Authority Patents(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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