New-energy heat-conductive foaming silica gel and preparation technology thereof

Abstract

The invention relates to a new-energy heat-conductive foaming silica gel and a preparation technology thereof. The silica gel is prepared from 60-80 parts of liquid silica gel, 20-30 parts of aluminumhydroxide, 10-20 parts of dimethicone, 20-30 parts of methylvinyl silica gel, 3-5 parts of disperser, 5-10 parts of foaming agent and 8-15 parts of curing agent. After all the constituents are evenlymixed and dispersed, the heat-conductive foaming silica gel mixture is put into a liquid calender for piece calendaring, then pieces are flatly put into a tunnel kiln for low-temperature roasting foaming, and the new-energy heat-conductive foaming silica gel is obtained. Compared with the prior art, the silica gel and the preparation technology have the advantages that foaming and heat conductionare fused together, the effects of heat conduction, buffering and sealing are achieved at the same time, and the specific gravity is low; in the prior art, a heat-conductive silica gel and a foamingsilica gel are needed in a battery, while the two effects can be achieved only by means of the new-energy heat-conductive foaming silica gel, so that the size of the battery is reduced by around 10%,the weight of the battery is lowered by around 30%, the material cost is lowered by 50%, and the manual assembly cost is lowered by 30%.

Description

technical field [0001] The invention relates to a new energy heat-conducting foamed silica gel and a preparation process, which are applied to the assembly lines of new energy automobile lithium batteries, high-speed rails, and aircraft and automobiles. Background technique [0002] At present, the filler of the lithium battery is foamed silica gel (the function of foamed silica gel is to fill the interior of the lithium battery, the lithium battery will expand to a certain extent when it is heated, and the foamed silica gel is used to protect the battery from being caused by the expansion of the battery. damage; foamed silica gel plays a certain role in fixing the battery block, and the battery will not shake during the use of the car), thermally conductive silica gel (maintaining a suitable temperature, the battery can achieve its best performance, improve the battery working temperature, keep the The excess heat diffuses out through the battery shell) is composed of two p...

AI Technical Summary

Problems solved by technology

[0002] At present, the filler of the lithium battery is foamed silica gel (the function of the foamed silica gel is to fill the inside of the lithium battery, and the lithium battery will expand to a certain extent when it is heated. Injury; foamed silica gel plays a certain role in fixing the battery block, the battery will not shake during the use of the car), heat-conducting silica gel (maintaining a suitable temperature, the battery can achieve its best performance, improve the working temperature of the battery, put Excess heat diffuses out through the battery case) consists of two parts, each battery module needs hundreds of pieces of heat-conducting silica gel and foamed silica gel, the cost is high, and the assembly process is complicated; the filling of foamed silica gel requires a certain amount of space inside the battery Space, the filling of thermal silica gel not only increases the volume of the battery but also has a relatively large proportion of thermal silica gel itself, which also increases the weight of the battery itself

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