Automobile high voltage wiring harness carries the important task of transmitting high voltage and high current in new energy vehicles, so its high temperature resistance is very important. The high temperature resistance of Automobile high voltage wiring harness is mainly reflected in its material selection and structural design to ensure stable electrical and mechanical properties in various high temperature working environments.
First of all, the insulation material of Automobile high voltage wiring harness is one of the key factors. In order to cope with high temperature environment, Automobile high voltage wiring harness of new energy vehicles needs to use special insulating materials to wrap the wires, such as cross-linked polyethylene (XLPE), silicone rubber, polytetrafluoroethylene (PTFE), etc. These materials not only have good electrical insulation properties, but also can remain stable in high temperature environment, not easy to age and crack.
Secondly, the high temperature resistance level of Automobile high voltage wiring harness is also an important performance indicator. High temperature resistance levels are usually divided into different levels such as 125℃, 150℃ and 200℃. When selecting wires, wires with corresponding high temperature resistance levels are usually selected according to the specific requirements of the vehicle. For example, high temperature conventionally selects wires with high temperature resistance of 150℃ to ensure that the wiring harness can still work normally in high temperature environment.
In addition, the shielding performance of the Automobile high voltage wiring harness is also one of the important factors to ensure high temperature resistance. In order to reduce the impact of electromagnetic interference (EMI) and radio interference (RFI) on the vehicle system, the Automobile high voltage wiring harness usually needs to have a shielding function. Shielding high voltage wires can be achieved by metal braided mesh or metal foil layer, which can effectively suppress electromagnetic interference and ensure the stable operation of the vehicle electrical system.
During the design and manufacturing process, the Automobile high voltage wiring harness also needs to take into account the vibration, collision and other situations that the vehicle may encounter during use. Therefore, the length, fixing method and activity area of the wiring harness need to be reasonably designed to avoid damage to the wiring harness due to vibration or mechanical stress.
In summary, the high temperature resistance of the Automobile high voltage wiring harness of new energy vehicles is achieved by selecting special insulating materials, setting appropriate high temperature resistance levels, enhancing shielding performance and reasonably designing the wiring harness structure. These measures jointly ensure the stability of the electrical and mechanical properties of the Automobile high voltage wiring harness in high temperature environments, ensuring the safe, reliable and long-term stable operation of new energy vehicles.
