Industry dynamic

Thermally conductive silicone adhesive film for power batteries


According to Wacker Chemie, the rapid development of electric power vehicles has opened up new areas of application for silicone materials. Because of their inherent properties of thermal conductivity, insulation and high resistance, silicone materials can be used as thermal conductivity, insulation and protective materials between electronic components and thus have a wide range of applications in electric drive systems, such as lithium batteries, fuel cells and electric motors.

In lithium batteries, it can be made as a thermally conductive caulking agent to fill the gap inside the battery pack and between the pack and the cooling system to increase the contact area and improve thermal conductivity; in fuel cells, it can be used as an insulating material between different modules and as a potting adhesive to achieve a sealing effect.

Currently, with the development of battery technology, the product line of electric vehicles is beginning to diversify. In the case of electric supercars, for example, because of the need for frequent high-speed operation of the motor, there are much higher requirements for heat dissipation and, consequently, higher requirements for thermally conductive materials. Compared to traditional solid materials, silicone materials are more effective fillers and offer greater thermal conductivity and protection than traditional solid materials.

Although Wacker Chemie does not give the percentage of sales of silicone materials in the automotive sector, Linebaugh told Chevron that the application of silicone materials in specialty products (including electric vehicles, fuel cells, etc.) is currently the fastest growing, with sales increasing by 20 percent in 2017, and is expected to maintain double-digit growth in the next five years. This is why Wacker Chemie will increase its investment in the electric vehicle sector and will invest in an electric vehicle competence centre in Shanghai.

The highly thermally conductive silicone film produced by Shenzhen Tensan uses silicone as its base material, which has good thermal conductivity.

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