In recent years, due to my country's major and rational layout of new energy vehicles and the orientation of relevant current policies, the total number of production, supply and sales has continued to grow, and the pace of industrial development has continued to accelerate, which has also promoted the upgrade of the safety factor of new energy vehicle components.

At present, pure electric vehicles mainly use lithium batteries as power batteries. After many years of development trends, the safety factor of lithium-ion battery power batteries has already been significantly improved. However, under the extreme standard, lithium batteries still have the risk of ignition and explosion. Lithium batteries ignite or explode as the most critical technical reasons for safety accidents in new energy vehicles. There are two ways to reduce and eliminate such safety accidents. One is to change the lithium battery itself, and the other is to use new materials with fire-retardant and flame-retardant properties. At this stage, there are five kinds of power batteries popular in China: lead-acid battery, lithium titanate, lithium cobaltate battery, lithium iron phosphate battery, nickel-cobalt-manganese, and nickel-cobalt-aluminum. Among them, lithium iron phosphate battery and ternary lithium battery are also the most common popular power devices used in battery cars at this stage. In a short period of time, it is impossible to find new materials to change or even replace the lithium battery itself. Therefore, it is the top priority to find new materials with more fire-retardant and flame-retardant effects for lithium battery sealing and maintenance weapons. At this stage, the common power battery thermal insulation raw materials include foam, foam plastic, glass wool, high silica wool, vacuum insulation panels, etc., but in the marketing and promotion of new energy vehicles, it shows a multi-pronged trend of advantages and disadvantages. .

The key energy source of new energy vehicles is the car battery pack, which provides the driver electromagnetic energy for the whole vehicle. In order to protect the electronic components inside the battery pack from being corroded by dust, precipitation, etc., the enclosure of the battery pack must also consider flame resistance and heat resistance, low heat transfer coefficient, no harmful gas, waterproof, waterproof, shockproof, lightweight and thin. Thickness, price parity six functions. Therefore, the waterproof sealing design scheme of the battery pack is very important. With its high-quality physical properties, extraordinary electrical equipment characteristics and reliable performance, foamed silica gel can reasonably handle the sealing and shock absorption of the left and right casings of the new energy vehicle battery pack and the shock absorption of other car parts supporting points.

Foamed silica gel is a lighter solid raw material used in the current stage of the project. It uses raw silica gel, fillers, vulcanization accelerators, foam rubber, etc. as raw materials. A polyurethane elastomer raw material of a porous structure, a low density and a compressible polymer material is obtained. The insulating layer is environmentally friendly, non-toxic and odorless, and has good flexibility. Long-term application without deformation, shrinkage resistance, corrosion resistance, aging resistance, UV resistance. Heat resistant (up to -40~220℃). Therefore, it has become the ultra-thin and most efficient thermal insulation and waterproof sealing weapon equipment for new energy vehicles and power batteries. Foamed silica gel is also widely used to fill light leakage, anti-fouling, impact absorption, and improve sealing around LEDs, as well as to prevent noise and fill gaps around audio speakers and speakers.