In recent years, due to the country's major deployment of new energy vehicles and the guidance of related policies, the number of production and sales has grown rapidly, and the pace of industrialization has continued to accelerate, which has also led to the upgrading of the safety performance of new energy vehicle components.
At this stage, electric vehicles mainly use lithium-ion batteries as power batteries. After years of development, the safety of lithium-ion power batteries has been significantly improved. However, under extreme conditions, lithium batteries still have the risk of burning and exploding. Lithium battery fire or explosion has become the most important technical cause of new energy vehicle accidents. There are two ways to reduce or even eliminate such accidents. One is to change the lithium battery itself, and the other is to use new materials with fire and flame retardant functions. At present, there are five mainstream power batteries in China: lead-acid, lithium titanate, lithium cobaltate, lithium iron phosphate, nickel-cobalt-manganese, and nickel-cobalt-aluminum. Among them, lithium iron phosphate and ternary lithium batteries are currently the most widely used mainstream power sources for electric vehicles. In the short term, it is also difficult to find new materials that change or even replace the lithium battery itself.
Therefore, it is urgent to find new materials with more fire-proof and flame-retardant functions for lithium battery sealing protection equipment. At present, the commonly used power battery thermal insulation materials include foam, plastic foam, ultra-fine glass wool, high-silica cotton, vacuum insulation board, etc., but in the promotion of new energy vehicles, there are advantages and disadvantages.
The core energy source of new energy vehicles is the vehicle battery pack, which provides driving power for the entire vehicle. In order to protect the internal components of the battery pack from dust, rain, etc., the sealing equipment of the battery pack must meet the requirements of flame retardant and high temperature resistance, low thermal conductivity, no toxic gas, waterproof, moisture-proof and shock-proof, light weight and thin thickness, and affordable Six functions. Therefore, the waterproof and sealed design of the battery pack is very important. With high-quality mechanical properties, excellent electrical properties and reliable performance, foamed silica gel can effectively solve the problems of sealing and damping the upper and lower shells of new energy vehicle battery packs and supporting and damping other automotive components.
Foamed silica gel is the lightest solid material currently used in engineering applications. It is a porous, foamed and vulcanized product made of raw silicone rubber, fillers, vulcanizing agents, and foaming agents after mixing evenly at high temperatures. Low density, compressible polymer elastomer material. Insulation, environmental protection, non-toxic and odorless, good flexibility. Long-term use without deformation, compression resistance, acid and alkali resistance, anti-aging, anti-ultraviolet. High temperature resistance (up to -40~220°C). Therefore, it has become the thinnest and most efficient thermal insulation and waterproof sealing equipment for new energy vehicles and power batteries. Foamed silica gel is also widely used for light leakage prevention, dust prevention, shock absorption, and air tightness around LEDs, as well as noise prevention and gap filling around speakers and speakers.
As of the end of 2019, the number of new energy vehicles in my country reached 3.81 million, and China's new energy vehicle market is booming. The stock is expected to increase from 3.81 million in 2019 to 7 million in 2025. There is still a huge room for growth of foamed silicone in the application of new energy vehicles. The foamed silicone industry is expected to usher in a large-scale explosion.
About silicone foam, please check the details:
https://www.siliconefoam.net/product-soft-cellular-silicone-iota-ht-870-.html
