Functions of Automobile High Voltage Wiring Harness
November 10,2022
High voltage wiring harness is the main carrier for power output of electric vehicles and is one of the key components to ensure the performance and safety of the whole vehicle.
The main function of the high-voltage harness in the vehicle is to provide a high-voltage strong current power supply for new energy vehicles. It is a high safety component in new energy vehicles and has the characteristics of large voltage/current, large wire diameter, a large number of wires, etc.
Performance requirements for automotive high voltage wiring harness
Electrical performance
In terms of electric passenger vehicles, high-voltage cables are mainly used to transmit energy. It needs to transmit the energy of the battery to each subsystem, so the designed high-voltage harness of electric passenger vehicles must meet the requirements of high-voltage and large current transmission.
Shield
When the electric vehicle is running, the repeated changes in electrical load and the frequency conversion technology widely used in the system cause sharp fluctuations in the harness voltage, current, and frequency. This also generates large electromagnetic interference. Generally, high-voltage connectors are 360 ° shielded, and high-voltage cables are shielded cables.
Mechanical properties
Due to the large diameter of high-voltage cables for electric passenger vehicles, special routing is required. That is, the high-voltage harness of electric passenger vehicles is arranged outside the vehicle. So the high-voltage harness of electric passenger vehicles must be designed for mechanical protection, dust-proof and waterproof.
Durability
High voltage harness shall be resistant to temperature, weather, corrosion, vibration, and abrasion. It also has a large safety margin and connection life to ensure long-term reliable operation of the vehicle.
To improve the service life and quality of it, the connection between the cable and connector should be strengthened. The connection between high-voltage connectors adopts a locking structure, and the wiring scheme is optimized.