Describe
The automobile wiring harness is the main body of the automobile circuit network and the carrier of the existence of the automobile circuit. The automotive wiring harness is the bridge and link for the work of automotive electrical components, and the nervous system for the distribution of automotive power and signal transmission. The high-voltage wiring harness can be connected to the internal wiring harness and the external wiring harness of the electric vehicle according to different voltage levels.

Electric vehicle high-voltage wire harnesses can be divided into motor high-voltage wires, battery high-voltage wires, charging high-voltage wires, etc., which mainly provide high-voltage power for new energy vehicles. The basic structure of a high-voltage wire consists of a core (conductor), an insulating layer, a shielding layer and a protective layer. Partial composition. When the cable passes a certain load current, it will definitely generate heat. As the load current gradually increases, the surface temperature of the cable will increase. The consequences can be serious if not dealt with promptly. Although the voltage in the high-voltage line is high, the current is not large; in the line design, the ampacity of the conductor is controlled within the rated ampacity of the conductor, so the heat generation of the conductor is also controlled within the allowable range

It is usually sufficient to use wire rated to 105°C, as long as the wire is not used in the engine bay or other high temperature resistant areas. Electric vehicle high voltage lines are usually higher than this temperature, such as 125°C or 150°C. If the wiring in electric vehicles is unfavorable, OEMs will even put forward higher requirements for high temperature resistance. Such as near the exhaust pipe, in front of the motor, behind the battery, etc.

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