1. Application of electromagnetic shielding materials
In order to avoid the influence of electromagnetic interference (EMI) on other electronic systems, the charging base wire harness is first optimized in terms of materials. It is common to wrap the wire harness with materials with electromagnetic shielding function. For example, metal foil or woven metal mesh is used as a shielding layer, which can effectively reflect and absorb external electromagnetic radiation. When the electromagnetic interference generated during the charging process encounters the shielding layer, the free electrons in the metal will move under the action of the electromagnetic field, thereby forming an electromagnetic field opposite to the external electromagnetic field, achieving the purpose of offsetting and weakening the interference. At the same time, the shielding layer needs to be well grounded to introduce the interference current into the earth to further enhance the shielding effect.
2. Reasonable wiring layout
Inside the car, the wiring layout of the charging base wire harness is crucial. By rationally planning the direction of the wire harness, keep it as far away from other sensitive electronic systems of the car as possible. For example, keep the wire harness at a certain distance from the car's electronic control unit (ECU), radio, navigation system and other susceptible devices. In addition, avoid laying the wire harness parallel to other signal lines to prevent interference caused by electromagnetic coupling. If it must be laid in parallel, increase the spacing between the two or use cross wiring to reduce the interaction of magnetic fields.
3. Application of filtering technology
In the design of wiring harness, filtering technology is an important means to reduce electromagnetic interference. Install filters at both ends or in the middle of the wiring harness, such as capacitor filters, inductor filters or combined filters. These filters can filter high-frequency interference signals generated during the charging process. For example, capacitor filters can bypass high-frequency interference signals to the ground, and inductor filters prevent high-frequency signals from passing through their own inductive reactance characteristics, allowing only DC or low-frequency charging currents to pass through the wiring harness, thereby preventing high-frequency interference signals from propagating to other electronic systems.
4. Comply with electromagnetic compatibility standards
The design and manufacture of charging base wire harness strictly follow the relevant electromagnetic compatibility (EMC) standards. These standards specify the upper limit of the electromagnetic radiation intensity generated by the wiring harness during the charging process and the sensitivity requirements to external electromagnetic interference. By designing, testing and verifying in accordance with the standards, it is ensured that the wiring harness will not generate electromagnetic interference beyond the regulations during normal charging, thereby ensuring the normal operation of other electronic systems in the car. For example, in the product development stage, strict EMC tests will be carried out to simulate various charging conditions, detect the electromagnetic interference emission level and anti-interference ability of the wiring harness, and improve and optimize those that do not meet the standards.
