What is a new energy vehicle high voltage wiring harness What are the characteristics of a 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 functions of connecting the internal and external wiring harnesses of electric and hybrid vehicles, distributing power through the distribution box, transmitting electric energy efficiently and with high quality, and shielding external signal interference. It is the neural network of the high-voltage system of new energy vehicles, which is extremely important for new energy vehicles. But many people are still very unfamiliar with it. Let's take a look at what the high-voltage wiring harness for new energy vehicles is and what are the characteristics of the high-voltage wiring harness for new energy vehicles!

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1. What is the high-voltage wiring harness for new energy vehicles? Automobile wiring harnesses can be divided into two types: low-voltage wiring harnesses and high-voltage wiring harnesses. 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 configured in electric vehicles according to different voltage levels. Internal and external wiring harnesses are connected. It mainly uses signal distribution within the wiring harness of the distribution box to transmit electric energy efficiently and with high quality, shield external signal interference, etc. The high-voltage wiring harness is the neural network of the high-voltage system of new energy vehicles, which is very important. Today let's talk about what is the high-voltage wiring harness of new energy vehicles? The high-voltage wiring harness of new energy vehicles is mainly composed of connectors, terminals, wires, covers and other parts. The high-voltage wiring harness of new energy vehicles can be configured to connect the internal and external wiring harness of electric vehicles according to different voltage levels. It mainly uses the internal wiring harness signal distribution of the distribution box to transmit electric energy efficiently and with high quality and shield external signal interference. Since the high-voltage wiring harness in the car has the characteristics of high voltage/high current and a large number of wires with large diameter, the design of the wiring harness faces challenges such as wiring, safety, shielding, weight and cost. 2. What are the characteristics of high-voltage wiring harnesses for new energy vehicles? 1. High voltage The high-voltage characteristics of high-voltage wiring harnesses can be seen from the name, so I will not introduce them here. 2. As the main energy transmission channel, the high-voltage wiring harness of high-current new energy vehicles needs to withstand a large current, and the rated working current of the DC bus can reach more than 300A. 3. Sealing performance: Due to the high voltage and high current characteristics of high-voltage wiring harnesses, there are also high requirements for the sealing performance of the wiring harnesses. Generally, waterproof and dustproof tests and airtight tests are required. If the sealing is not good, it will lead to moisture or water ingress, which will cause Extremely rapid aging or damage of wires and connection parts. If the sealing performance at the connector is poor, the insulation resistance can also be reduced, and the whole vehicle will report insulation failure. 4. Heat resistance: Since the high-voltage wiring harness passes through a large current for a long time, because the power is very large, a large amount of heat is generated by the Joule effect. Therefore, the temperature resistance level of the wires of the high-voltage wiring harness generally reaches 125 °C (150 °C), and the temperature resistance of the terminals generally reaches 140 °C. 5. EMC performance: EMC (ElectroMagnetic Compatibility, ElectroMagnetic Compatibility) refers to the ability of a device or system to operate in accordance with the requirements in its electromagnetic environment without causing intolerable electromagnetic interference to any equipment in its environment. Simply put, EMC includes EM1 (Electro Magnetic Interference) and EMS (Electro Magnetic Susceptibility). EMl refers to the electromagnetic interference caused by the equipment to the environment during normal operation; EMS refers to a certain degree of immunity of an appliance to electromagnetic interference existing in its environment. EMI is active, that is, it interferes with the outside world, while EMS is passive, that is, it resists external interference. Therefore, the EMC requirements for the equipment are: to reduce interference to others, and at the same time be able to resist a considerable degree of external interference.

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