What is the new energy vehicle high voltage wiring harness?
The high-voltage wiring harness of new energy vehicles is a key component of the high-voltage electrical system, which provides a guarantee for the reliable operation and safety of new energy vehicles. It carries the internal and external wiring harness connections of electric and hybrid vehicles, distributes power through the power distribution box, transmits electric energy efficiently and with high quality, and shields external signal interference. important. But many people are still very unfamiliar with it, let's go to the article to see what the new energy vehicle high-voltage wiring harness is and what are the characteristics of the new energy vehicle high-voltage wiring harness!
Automotive wiring harnesses can be divided into low-voltage wiring harnesses and high-voltage wiring harnesses as a whole. Traditional fuel vehicles mainly use low-voltage wiring harnesses, while new energy vehicles mainly use high-voltage wiring harnesses. High-voltage wiring harnesses can be connected to the internal and external wiring harnesses of electric vehicles according to different voltage levels. The main application is the distribution of the internal wiring harness signal of the power distribution box, the efficient and high-quality transmission of electric energy, the shielding of external signal interference, etc. The high-voltage wiring harness is the neural network of the high-voltage system of the new energy vehicle, which is very important. Today we will talk about what is the high-voltage wiring harness of the new energy vehicle ?
The high-voltage wiring harness of new energy vehicles is mainly composed of connectors, terminals, wires, coverings and other parts. The high-voltage wiring harness of new energy vehicles can be connected to the internal and external wiring harnesses of electric vehicles according to different voltage levels. It is mainly used for signal distribution of the internal wiring harness of the power distribution box, to transmit electric energy with high efficiency and high quality, and to shield external signal interference. Due to the characteristics of high-voltage/high-current and large-diameter wires in the vehicle, the design of the wiring harness faces challenges such as wiring, safety, shielding, weight and cost.
What are the characteristics of high-voltage wiring harnesses for new energy vehicles?
1. High voltage
The high-voltage characteristics of the high-voltage wiring harness can be seen from the name, so I won't introduce it here.
2. High current
As the main energy transmission channel, the high-voltage wiring harness of new energy vehicles needs to withstand relatively large currents, and the rated operating current of the DC bus can reach more than 300A.
3. Sealing
Due to the high-voltage and high-current characteristics of the high-voltage wiring harness, there are also high requirements for the sealing of the wiring harness. Generally, waterproof and dustproof tests and airtight tests are required. rapid aging or damage. If the sealing performance of the connector part is poor, it can also lead to a decrease in insulation resistance, and the entire vehicle will report insulation failure.
4. Heat resistance
Because the high-voltage wire harness passes a large current for a long time, because of the high power, a lot of heat is generated by the Joule effect, so the temperature resistance of the wires of the high-voltage wire harness generally reaches 125°C (150°C), and the terminal temperature generally reaches 140°C.
