High temperature silicone material is one of the indispensable important materials in automobile manufacturing, which can not only optimize the automobile manufacturing process, but also improve the performance and safety of the automobile. It has been widely used in various parts of the automobile, such as airbag coating. Power transmission seals, gaskets, hoses, windshield linings, automotive engine seals, ignition wire and coil sheathing, automotive turbo tube cooling tubes, sealing and protection of automotive components, high voltage cables and harness seals, etc.


Compared with traditional fuel vehicles, hybrid and pure electric vehicles increase a lot of high-voltage accessories, such as power batteries, high-voltage distribution boxes, drive motors, motor controllers, etc., which also puts forward new requirements for automotive cables. Because these cables are arranged in the front cabin engine and chassis area, the temperature is high and the space is narrow, and the cable is soft, the turning radius is small, and the performance of high and low temperature resistance is good. Secondly, the road conditions are complex, and the wear resistance of the cable must be good and the mechanical strength is high. In addition, the speed is high and low, especially in severe conditions such as full load climbing, and the instantaneous large current requires the cable to have short-term overload capacity.


In summary, the new energy vehicle cable must have: good electrical insulation performance; Thermal stability, weather resistance; With corrosion resistance, oil resistance, hydrophobicity, excellent flame retardant performance; Superior mechanical properties, high flexibility and high tear resistance.


At present, the insulating materials of automobile power cable include cross-linked polyolefin and thermoplastic elastomer. Among them, the heat resistance of the cross-linked polyolefin material can reach 150 ° C, but the material cable is relatively hard, inconvenient to install in the narrow space of the car body, and requires irradiation cross-linking, the process is complex, and is not suitable for large cross-section cables. The heat resistance of thermoplastic elastomer materials does not exceed 125 ° C, and the temperature grade for power cables is low, and the long-term use of thermoplastic elastomer cables will have the risk of cracking.


The high temperature resistant silicone rubber has high and low temperature resistance, ozone resistance, weather resistance and excellent electrical insulation; The silicone rubber wire has large carrying capacity, saves conductor cross section, and can meet the requirements of long-term full load operation; Fire resistance can be achieved by adding flame retardants; Highly flexible, easy to install in a limited space; High tear resistance silicone rubber, trouser type tear up to 25N/mm. Therefore, silicone rubber materials can make up for their shortcomings while synthesizing the advantages of cross-linked polyolefin and thermoplastic elastomer materials, and silicone rubber can reduce vehicle weight and carbon dioxide emissions, which is a high-quality choice for automotive power cables.