At present, new energy vehicles are developing in the direction of high voltage and high current. Some high-voltage systems can withstand voltages as high as 800V and currents as high as 660A. Such large currents and voltages will produce electromagnetic radiation, which will interfere with the normal operation of other electronic components.
There are some commonly used shielding electromagnetic interference methods for high-voltage wiring harness:
（1）The conductor has its own shielding layer
Below is a schematic diagram of the structure of a single-core high-voltage wire with its own shielding layer, which is usually composed of two layers of metal conductive material and two layers of insulating material, from the inside to the outside is the core, insulation layer, shielding layer, insulation layer. The wire core is generally made of copper or aluminum, which is the carrier of current. When the current passes through the wire core, electromagnetic interference will be generated, and the role of the shielding layer is to shield electromagnetic interference, so that the electromagnetic interference starts from the wire core and stops at the shielding layer, and will not be emitted to interfere with other electronic devices.