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Difference of Wire Harness between EV Car and Fuel Car

Updated: Apr 23

There are significant differences between EV car wiring harnesses and traditional fuel car wiring harnesses, mainly in the following aspects:

1. High and Low Voltage:

EV car wiring harnesses can be high and low voltage, with high voltage wiring harnesses occupying a large proportion; Traditional fuel vehicles mainly rely on low-voltage wiring harnesses.


2. Communication:

The traditional fuel car wiring harness mainly serves as a power supply, while the EV car wiring harness not only for power supply, but also needs to transmit signals.

3. Anti interference:

The interference of fuel car wiring harnesses is relatively low, but EV car wiring harnesses need to undergo anti-interference treatment to avoid interference and failure during signal transmission.


4. Flame retardant:

After all, it's about safety issues, and the flame retardant level of both car wire harness is similar.

5. Production process and technical requirements:

The wiring harness of EV vehicles operates in high current and high voltage environments, requiring higher requirements in terms of wiring harness delivery capacity, mechanical strength, insulation protection, and electromagnetic compatibility.


In addition, the installation position of the motor and battery of EV vehicles also requires the high-voltage wiring harness to be routed outside the vehicle, so its mechanical protection is very important. Higher requirements have also been put forward for the shielding performance, anti-interference performance, and sealing performance of high-voltage wiring harnesses.


In terms of wire harness processing technology, high-voltage wire harnesses have high requirements for crimping technology due to their involvement in battery pack voltage and temperature collection.

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