Heat-conducting silica gel sheet for heat dissipation of lithium battery of new energy automobile and preparation method thereof

A technology for new energy vehicles and heat-conducting silicone sheets, applied in chemical instruments and methods, heat exchange materials, etc., can solve problems such as easy formation of high temperature environment, failure of power system control of new energy vehicles, impact on battery performance and state of charge, etc.

Inactive Publication Date: 2020-05-01
安徽品罗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Lithium-ion batteries, as the power core of new energy vehicles, form car battery packs through parallel connection and series connection. Due to the dense assembly method between batteries, it is ea...

Method used

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  • Heat-conducting silica gel sheet for heat dissipation of lithium battery of new energy automobile and preparation method thereof
  • Heat-conducting silica gel sheet for heat dissipation of lithium battery of new energy automobile and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A thermally conductive silica gel sheet for heat dissipation of lithium batteries of new energy vehicles, prepared from the following raw materials in parts by weight:

[0038]30 parts of vinyl-terminated methyl silicone oil, 2 parts of α, ω-terminated hydroxyl polydimethylsiloxane, 5 parts of polymethylhydrogen siloxane, 0.5 parts of tetramethoxysilane, graphene-doped boron nitride 30 parts, 15 parts of fumed white carbon black, 2 parts of microcrystalline paraffin, 0.1 part of dibutyltin dilaurate, 6 parts of KH-5706, 20 parts of methyl vinyl MQ silicone resin, 0.2 parts of ethynyl cyclohexanol, allyl 6 parts of glycidyl ether, 1 part of zinc dimethyldithiocarbamate, 0.01 part of hydrosilylation catalyst, and 150 parts of water.

[0039] The preparation method of graphene-doped boron nitride is as follows:

[0040] Borax and urea with a molar mass ratio of 1:2.5 were dried and dehydrated separately, mixed by ball milling, added to the reaction kettle, heated to 300°C...

Embodiment 2

[0044] A thermally conductive silica gel sheet for heat dissipation of lithium batteries of new energy vehicles, prepared from the following raw materials in parts by weight:

[0045] 36 parts of vinyl-terminated methyl silicone oil, 2 parts of α, ω-terminated hydroxyl polydimethylsiloxane, 5 parts of polymethylhydrogen siloxane, 0.2 parts of tetramethoxysilane, graphene-doped boron nitride 30 parts, 15 parts of fumed white carbon black, 2 parts of microcrystalline paraffin, 0.05 parts of dibutyltin dilaurate, 5 parts of KH-570, 25 parts of methyl vinyl MQ silicone resin, 0.2 parts of ethynyl cyclohexanol, 10 parts of propyl glycidyl ether, 1 part of zinc dimethyldithiocarbamate, 0.01 part of hydrosilylation catalyst, and 100 parts of water.

[0046] The preparation method of graphene-doped boron nitride is as follows:

[0047] Borax and urea with a molar mass ratio of 1:2.5 were dried and dehydrated separately, mixed by ball milling, added to the reaction kettle, and heated ...

Embodiment 3

[0051] A thermally conductive silica gel sheet for heat dissipation of lithium batteries of new energy vehicles, prepared from the following raw materials in parts by weight:

[0052] 40 parts of vinyl-terminated methyl silicone oil, 2 parts of α, ω-terminated hydroxyl polydimethylsiloxane, 2 parts of polymethylhydrogen siloxane, 0.2 parts of tetramethoxysilane, graphene-doped boron nitride 20 parts, 20 parts of fumed white carbon black, 2 parts of microcrystalline paraffin, 0.1 parts of dibutyltin dilaurate, 6 parts of KH-570, 25 parts of methyl vinyl MQ silicone resin, 0.3 parts of ethynyl cyclohexanol, olefin 5 parts of propyl glycidyl ether, 1.5 parts of zinc dimethyldithiocarbamate, 0.01 part of hydrosilylation catalyst, and 150 parts of water.

[0053] The preparation method of graphene-doped boron nitride is as follows:

[0054] Borax and urea with a molar mass ratio of 1:2.5 were dried and dehydrated separately, mixed by ball milling, added to the reaction kettle, and...

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Abstract

The invention provides a heat-conducting silica gel sheet for heat dissipation of a lithium battery of a new energy automobile and a preparation method thereof, belonging to the field of heat dissipation materials for lithium batteries. The heat-conducting silica gel sheet is prepared from the following raw materials in parts by weight: 30 to 40 parts of vinyl-terminated methyl silicone oil, 1 to3 parts of alpha,omega-hydroxyl-terminated polydimethylsiloxane, 2 to 5 parts of polymethylhydrosiloxane, 0.1 to 1 part of tetramethoxysilane, 20 to 30 parts of graphene doped boron nitride, 10 to 20parts of fumed silica, 1 to 5 parts of microcrystalline wax, 0.05 to 0.2 part of dibutyltin dilaurate, 5 to 10 parts of KH-570, 20 to 25 parts of methyl vinyl MQ silicon resin, 0.1 to 0.5 part of acetenyl cyclohexanol, 5 to 10 parts of allyl glycidyl ether, 1 to 2 parts of zinc dimethyldithiocarbamate, 0.01 to 0.02 part of a hydrosilylation catalyst and 100 to 200 parts of water. The heat-conducting silica gel sheet has good heat conduction performance, the heat conduction coefficient is larger than or equal to 7.21 W/(m.k), the insulation performance is excellent, the breakdown voltage is larger than or equal to 24.63 kV, and certain mechanical elasticity is achieved; and the heat conduction silica gel sheet is not prone to crushing and fracturing, and can meet the requirement for heat dissipation of the lithium battery of the new energy automobile.

Description

technical field [0001] The invention relates to the field of heat dissipation materials for lithium batteries, in particular to a thermally conductive silica gel sheet for heat dissipation of lithium batteries of new energy vehicles and a preparation method thereof. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fuels, the use of new vehicle power devices), integrated vehicle power control and advanced technology in driving, the formation of advanced technical principles, with Automobiles with new technology and new structure. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and other new energy vehicles. Among them, a pure electric vehicle is a vehicle that uses a single battery as the energy storage power source. It uses the battery as the energy storage power s...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08L83/05C08L91/06C08K13/04C08K7/26C08K5/39C08K3/38C08K3/04C09K5/14
CPCC08K2003/385C08L83/04C08L2203/20C08L2205/025C08L2205/035C09K5/14C08L91/06C08K13/04C08K7/26C08K5/39C08K3/38C08K3/041
Inventor 韩娜娜
Owner 安徽品罗科技有限公司
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