Automotive high-voltage cable insulation performance materials

Since the electric passenger car high-voltage cable to meet the high-voltage high current, anti-electromagnetic interference at the same time to meet the requirements of wear resistance and flame retardant, so the performance of these materials are compared: a, LSZH can be divided into PO (polyolefin) and EPR (ethylene propylene rubber) type two categories of cable material is the mainstream.

a. LSZH can be divided into two categories: PO (polyolefin) and EPR (ethylene propylene rubber), of which PO cable material is the mainstream. PO LSZH flame retardant cable material has a large amount of AI(OH)3 and Mg(OH)2 inorganic flame retardants in its formulation, which makes the cable material have better flame retardant, low smoke, halogen-free and low toxicity characteristics, but also makes it more difficult to match the physical and mechanical properties, electrical properties and extrusion process properties. However, it is also different from other non-flame-retardant materials and halogen-containing flame-retardant materials in terms of physical and mechanical properties, electrical properties and extrusion process performance.

b. TPE is a polymer material with the characteristics of both rubber and thermoplastic, which shows the high elasticity of rubber at room temperature and can be plasticized and molded at high temperature.

c. XLPE is made of ordinary PE (polyethylene) material with temperature resistance grade of 75℃ after irradiation cross-linking, and its temperature resistance grade can reach 150℃, and has excellent physical and mechanical properties, overload resistance and long life, but it is not flame retardant.

d. The breakdown voltage of silicone rubber is high, so it has arc resistance, leakage trace resistance, ozone resistance, and it also has good high and low temperature resistance, high temperature resistance up to 200 ℃, good insulation performance, stable performance in high temperature and high humidity conditions, and flame retardant. After comparing the performance of the above materials, silicone rubber became the first choice of insulation material for high-voltage cables of electric passenger cars because of its good physical and mechanical properties, long service life and low price. The final design of the structure of the high-voltage cable for electric passenger cars.

Also, electric vehicle cables at a glance.

Would you like to know more about our electric vehicle product range? You can find out more in our high-voltage cable leaflet. https://www.omgevcable.com