However, the use of aluminum conductors instead of copper conductors will also face many problems, making it difficult for car manufacturers to easily try high-voltage aluminum conductors. First of all, the electrical conductivity of aluminum is significantly lower than that of copper. To achieve the same electrical conductivity, the wire diameter needs to be further increased; the tensile strength of aluminum is lower, which affects the mechanical properties; the difference in the expansion coefficient of aluminum and copper will also make The aluminum wire and the copper terminal create voids at the bonding interface, resulting in an increase in impedance; aluminum is easily oxidized, and the insulating aluminum oxide may affect the contact performance.