Automobile high voltage cable shielding method

China [CN]

The difference between electric vehicles and traditional fuel vehicles is that electric vehicles rely on power components to drive, and the two common core power components are batteries and motors. In order to achieve higher battery life, they usually need to be equipped with higher power drive motors. A higher voltage is required on the high voltage bus. 

The battery and motor are mainly responsible for the power supply and charging of the vehicle. To drive the car, it is necessary to convert DC power into AC power through an inverter or a converter, or convert AC into DC to charge the battery. This process requires the use of a drive system. The IGBT repeatedly drives the inverter to work, which will generate electromagnetic interference, and with the increase of the voltage platform, the electromagnetic interference will become more and more serious. 

However, the high-voltage wiring harness of new energy vehicles needs to adopt a shielding design to limit the radiation to a specific area or prevent radiation from entering a specific area. A common harness shielding design is to use braided tinned copper to isolate the cable conductor from the external environment, so as to achieve a good shielding effect. 

The wiring harness is mainly composed of connectors and cables. The shielding methods are roughly divided into three types. One is single-core shielding, that is, each cable is shielded, and the part connected to the connector shield is within its sealing range. This shielding is the main connection method in our country; the second is the overall shielding, which uses shielded metal braiding to directly wrap the cable; the third is single-core single-strand shielding, which has poor resistance to the connection with the connector. protective effect. To learn more information: https://www.omgdd.com