Therefore, the crimp height of the cable and the connector terminal must be strictly controlled. Connector terminals are often crimped by point pressure, confining pressure and other methods. Generally, the crimping depth of point crimping is d/2 (d is the outer diameter of the terminal). At this time, although all the gaps between the cable and the terminal can be compressed, the pressure pit is too deep, which will easily lead to excessive deformation of the cable core. , is pressed into a sharp angle, resulting in the tip effect of the electric field, and even the cable core is broken in severe cases, resulting in poor electrical continuity and conductivity of the automotive high-voltage wiring harness.