Продам: What performance requirements do high-voltage wiring harnesses for new energy vehicles need to meet?

As the main carrier of new energy electric vehicle power output, high-voltage wiring harness is one of the key components for vehicle performance and safety. The research and development and design of high-voltage wiring harness need to meet the following performance.

1. High voltage

Voltage resistance: 600/900V AC; 1000/1500V DC.

2. High current

As the main energy transmission channel, the high-voltage wire harness needs to carry a large current, and the rated working current of the DC bus must be able to reach more than 200A.

3. Sealing

In view of the high-voltage and high-current characteristics of high-voltage wiring harnesses, in addition to the sealing requirements for components, there are higher requirements for the sealing performance of the wiring harness assembly. Aged or damaged. If the sealing performance at the connector part is poor, the insulation resistance will also decrease, and the whole vehicle will report an insulation failure. Therefore, it is necessary to carry out a dustproof test and an airtight test on all parts produced in mass production.

4. Heat resistance

Since the high-voltage wiring harness passes a large current for a long time, the power is very large, and a large amount of heat will be generated according to the Joule effect. Therefore, the temperature resistance level of the high-voltage wiring harness assembly should generally reach 125 ℃ ~ 150 ℃.

5. EMC performance

The high-voltage wiring harness assembly needs to be shielded by high-voltage wires and connectors to deal with possible electromagnetic interference. However, it should be noted that even if the component level meets the EMC requirements, it does not mean that the EMC performance of the vehicle is qualified.

In the actual development and design of the vehicle, even if the high-voltage wiring harness itself is qualified for EMC, when there is a problem with the battery compatibility of the vehicle, the components including the high-voltage wiring harness assembly need to be adjusted.

6. Durability

The service life required by high-voltage wiring harnesses is slightly higher than that of other parts on electric vehicles, because high-voltage wiring harnesses are often arranged in harsher environmental areas and are more susceptible to collision, friction, various solvents and other external components than other components. The corrosion of the environment leads to failures such as short circuits, so the durability of the high-voltage wiring harness is also one of the important properties that it needs to meet.

7. Security

Voltage definition of high-voltage wiring harness: 60V DC<U<1500V DC; 30V AC<U<1000V AC.

The current of the high-voltage system components can reach up to 400A. In general, the safe voltage of the human body is 36V, and the allowable current is 36mA, which is much higher than the safe voltage and safe current that the human body can accept. Therefore, the safety of the high-voltage wiring harness assembly is very important.

The safety design of high-voltage wiring harnesses is mainly reflected in aspects such as insulation, withstand voltage protection, overload, connector IP rating, equipotential equalization line, and wiring layout of high-voltage wiring harnesses. It should be noted that these safety designs are aimed at the design of parts and components. Level and part assembly design level, the two need to be combined to achieve.

To learn more about high-voltage wiring harnesses, please visit the OMG official website:https://www.omgevcable.com/