What is the close relationship between potting silicone and lithium ion batteries for new energy vehicles?

Lithium battery fire and explosion are the main causes of new energy vehicle accidents. There are two ways to reduce such accidents. One is to change the lithium ion battery itself, and the other is to use liquid silica gel as a potting material to provide fire retardant effect.

Liquid silicone potting glue is mainly used in the lithium battery pack, which plays the role of heat conduction, temperature equalization, flame retardant, explosion-proof, insulation and waterproof. Organic silica gel is regarded as a "new hope" to improve the safety of power batteries. The thermal conductivity of liquid silicone can be more than 2, and the fire resistance can reach UL94V0. It is needless to say that it is waterproof, very good! It is very suitable for potting fillers.

However, liquid silicone potting glue also has its disadvantages, that is, the specific gravity is large, the battery pack will be aggravated, and the energy ratio per unit volume is lowered, eventually affecting the energy density.

At present, organic silica gel products still face two major promotion problems in the lithium battery market: First, how to achieve lightweight requirements. Although the density of Guibao technology products is already very low, the application in the battery pack will increase the overall weight of the battery pack by 5%-8%. Second, lithium battery companies have insufficient understanding of organic silicon. Domestic lithium battery companies do not understand the choice and use of silicone products. It is difficult to achieve the desired results by blindly selecting silicone products, thus losing confidence in silicone products.

It can be said that the decreasing task of the organic silica gel in the power battery is an urgent problem to be solved by the organic silica gel enterprise, and is also the key to improving the utilization rate of the market.

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