1. Improper crimping of electrical terminal pins leads to excessive contact resistance and excessive temperature rise.

The crimping of the cable core and the terminal, the crimping contact surface tends to point contact, and there is not enough contact surface.

Excessive crimping force leads to broken wires and reduced current carrying capacity.

Small crimping force leads to loose crimping, resulting in quasi-virtual connection.

2. The selection of electrical terminal pins and the selection of plating are unreasonable, resulting in excessive temperature rise and burning after use

The selection of copper core material is different from the selection of plating, which affects the conductivity between the charging plug body and the socket, and different materials affect the hardness of the terminal.

The difference is large. After exceeding a certain number of times, the surface plating is damaged to varying degrees, and the contact resistance generated during matching is too high, affecting the temperature rise.

The treatment of anti-static plugs affects the coordination of terminals.

3. The anti-electric plug of the charging gun terminal is easy to fall off

The connection between the plug and the terminal is unreliable and easy to loosen. When the charging plug is actually working, the temperature rises and the plug is easy to fall off. There are problems with the structural design.

4. The electrical terminal pin is not accurate enough, and the charging plug and the socket are not well matched, resulting in a virtual connection.

The copper core processing accuracy is unreasonable, and the tolerance is too large, resulting in too tight or too loose fit with the socket.

The elastic body deformation of the rear of the charging socket is unreasonable, resulting in deviations from the copper core.

The different pin forms of the charging socket on the vehicle end cause inconsistent contact resistance.