Rapidly changing technology trends in electric vehicle manufacturing are driving silicone manufacturers to take innovative approaches to producing custom products. The solution of liquid silicone rubber in new energy vehicles mainly has four applications: sealing and waterproofing, safety protection, structural heat conduction, and lightweight. Liquid silicone rubber elastomer is the most prominent product segment in the electric vehicle market, and its growth can be attributed to its wide range of applications such as seals, housings and gaskets for thermal insulation of various components such as connector seals, heat sinks etc., form a heat shield around the battery pack to protect the battery cells from excessive heat or cold. Additionally, custom designs can insulate or help dissipate heat to ensure optimal operating temperatures. To fit in demanding spaces, the silicone is designed to withstand severe vibrations. Short circuits and overcurrent are the main causes of battery failure in electric vehicles, and the dielectric properties of silicone rubber protect and isolate critical components, keep batteries and busbars safe from power surges, and help prevent battery fires.

Application of liquid silicone rubber in lithium-ion battery panels
In new energy vehicles, liquid silicone encapsulant is mainly used in the lithium battery pack link, which plays the role of heat dissipation, flame retardant, insulation, waterproof, etc., which greatly improves the power safety of new energy vehicles. Lithium batteries are sensitive to moisture, and the tightness directly affects the working safety of the battery system and the safety of electric vehicles. From the perspective of development history, silicone has undergone product upgrades from single-component cushion-free glue - foam molding sealing ring - online foam silicone in sealing and waterproofing. However, the liquid silicone potting compound has a large proportion, which will increase the weight of the battery pack, reduce the energy ratio per unit volume, and ultimately affect the energy density. How to realize the lightweight of liquid silicone is an urgent problem to be solved by silicone enterprises at present. At present, online foamed silica gel is favored in the new energy automobile industry, and is suitable for application scenarios such as sealing and waterproofing of power batteries, shock absorption protection of soft-packed cells, thermal insulation of battery packs, and lightweight.