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Silicone rubber based thermal failure protection material and preparation method and application thereof

A protective material, silicone rubber technology, applied in the field of silicone rubber-based thermal failure protection materials and its preparation, to achieve the effects of prolonging the vulcanization induction period, preventing combustion, and improving flame retardancy

Active Publication Date: 2019-08-06
苏州沃尔兴电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, so far, the research on thermal failure protection materials for power battery modules is still in the exploration and verification stage, and there is still no efficient and reliable thermal failure protection materials that can be widely used

Method used

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  • Silicone rubber based thermal failure protection material and preparation method and application thereof
  • Silicone rubber based thermal failure protection material and preparation method and application thereof
  • Silicone rubber based thermal failure protection material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0057] (1) Add N-aminoethylpiperazine to the vacuum kneader, and pass high-purity carbon dioxide gas into the vacuum kneader at a rate of 93mL / min for mechanical mixing, set the mixing time to 2h, the mixing temperature to 30°C, and the rotor speed to 40rpm , to obtain passivated N-aminoethylpiperazine in white powder;

[0058] (2) Add epoxidized methyl vinyl silicone rubber with an epoxy group mole fraction of 3.5% into a vacuum kneader, perform high-temperature mastication under vacuum conditions, set the mastication time to 26 minutes, and the mastication temperature to 155°C, the rotor speed is 135rpm, the silicone rubber masticated rubber is prepared, and it is parked at room temperature for 24h, and it is ready for use;

[0059] (3) 100 parts of silicone rubber masticated by the above step (2), 42 parts of methyl silicone oil, 10 parts of ammonium polyphosphate, 24 parts of precipitated white carbon black, 5 parts of hydroxyl silicone oil, 23 parts of lead-based glass P...

Embodiment 2

[0069] (1) Add N-aminoethylpiperazine into the vacuum kneader, and pass high-purity carbon dioxide gas into the vacuum kneader at a rate of 76mL / min for mechanical mixing, set the mixing time to 3.2h, the mixing temperature to 33°C, and the rotor speed to 55rpm, passivated N-aminoethylpiperazine in the form of white powder;

[0070] (2) Add 100 parts of epoxidized methyl vinyl phenyl silicone rubber with a mole fraction of 2.1% into a vacuum kneader, and carry out high-temperature mastication under vacuum conditions. The mastication time is 26 minutes, and the mastication temperature is 162°C. The rotor speed is 95rpm, and the silicone rubber is plasticized, and it is parked at room temperature for 24h, and it is ready for use;

[0071] (3) 100 parts of silicone rubber masticated by the above step (3), 43 parts of vinyl silicone oil, 18 parts of magnesium hydroxide, 2 parts of fumed silica, 5 parts of dimethyldimethoxysilane , 34 parts of hydroxyl glass powder, 7.5 parts of b...

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Abstract

A silicone rubber based thermal failure protection material and a preparation method and application thereof are provided. The material includes 100 parts of epoxidized silicone rubber, 0.5-10 parts of a vulcanizing agent, 0.1-8 parts of a vulcanization regulator, 2-40 parts of a flame retardant, 5-80 parts of a plasticizer and 5-100 parts of a reinforcing agent. The epoxidized silicone rubber isprepared by epoxidizing silicone rubber containing unsaturated double bonds with an epoxidizing agent. The vulcanizing agent is passivated N-aminoethyl piperazine and is prepared by adding N-aminoethyl piperazine into a kneading machine, feeding carbon dioxide and performing mechanical mixing. The vulcanization regulator is dialkyldithiophosphate. The material has excellent fireproofness, flame retardance, heat insulation performance, electric breakdown resistance, and the like, and is controllable in volume expansion so that the material is a thermal failure protection material with excellentcomprehensive performance, can be used for power batteries, modules thereof and other fields, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of thermal failure protection materials, and in particular relates to a silicone rubber-based thermal failure protection material and its preparation method and application. Background technique [0002] Power battery is a key component of new energy vehicles. Due to the limitation of cooling structure, materials, layout space and use conditions, it is easy to cause heat accumulation of power battery during work, which may cause safety problems such as explosion, fire, thermal runaway and so on. Improving the safety, reliability and stability of electric vehicle power batteries has become a key technical problem to be solved in the field of electric vehicles. [0003] Thermal failure prevention materials can play a very important role in improving the safety performance of new energy vehicle power battery packs. An ideal thermal failure protection material applied to a power battery module should have three...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/04C08L83/07C08K3/36C08K5/3462C08K5/5398C08K3/32C08K3/40C08K3/22
CPCC08L83/06C08L2201/02C08L2201/08C08K2003/323C08K2003/2224C08L83/04C08K3/36C08K5/3462C08K5/5398C08K3/32C08K3/40C08K3/22
Inventor 赵永青朱小勇余宏伟许琳琼王军刘凯
Owner 苏州沃尔兴电子科技有限公司
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