Shielding Layer of High-Voltage Wire Harness: Core Guarantee for Safety and Performance of New Energy Vehicles

2026-03-20 10:51:53

Amid the wave of new energy vehicles (NEVs) upgrading towards high voltage and intelligence, high-voltage wire harnesses, as the core connection carrier of the "three-electric system" (battery, motor, electronic control), their safety and stability directly determine vehicle performance. As a key protective structure of high-voltage wire harnesses, the shielding layer not only undertakes electromagnetic interference (EMI) isolation but also plays an irreplaceable role in high-voltage safety and environmental adaptability, becoming an important focus of technological iteration in the NEV industry.

With high-voltage platforms gradually becoming standard in mid-to-high-end NEVs, high-voltage wire harnesses face stronger electromagnetic radiation and anti-interference requirements. The shielding layer must achieve "two-way protection": on the one hand, it blocks external electromagnetic signals from interfering with high-voltage transmission to ensure precise coordination of motors and electronic control systems; on the other hand, it suppresses electromagnetic radiation from the harness itself to avoid interfering with precision electronic equipment such as on-board radar and autonomous driving sensors. The current mainstream shielding solution is a composite structure of aluminum-plastic composite tape and metal braided layer, balancing shielding efficiency and mechanical reliability. Among them, aluminum-plastic composite tape has become one of the core shielding materials for high-voltage wire harnesses due to its excellent moisture resistance, cost advantage and good shielding effect.

With over 20 years of experience in the aluminum-plastic composite material field, Hangzhou Hongcheng Technology Co., Ltd. accurately grasps the technical needs of high-voltage wire harnesses for NEVs and empowers shielding layer materials with mature composite technology. Relying on a standardized production base and a professional R&D team, the company's aluminum-plastic composite shielding materials specially designed for high-voltage wire harnesses adopt a three-layer composite structure of "plastic film-aluminum foil-plastic film". The thickness of the aluminum layer is precisely controlled, combined with a special adhesive layer and protective layer, achieving a balanced adaptation of shielding efficiency, flexibility and corrosion resistance to meet the core usage needs of high-voltage wire harnesses.

Hongcheng Technology's aluminum-plastic composite shielding materials can adapt to the full-temperature extreme working conditions of NEVs, with excellent shielding attenuation performance, fully complying with mainstream EMC requirements in the industry. For the working scenario of frequent bending and vibration of high-voltage wire harnesses, the material is optimized through special technology, with outstanding fatigue resistance, which can effectively avoid shielding failure caused by aluminum layer fracture during bending. Meanwhile, the product has excellent flame-retardant properties, and with a strict full-process quality control system, it provides comprehensive safety guarantee for high-voltage wire harnesses and builds a solid defense line for vehicle operation.

At present, Hongcheng Technology's aluminum-plastic composite shielding materials have been widely used in aerospace cables, high-voltage wire harnesses, automotive cables and other scenarios of NEVs, establishing in-depth cooperation with many mainstream automakers and wire harness manufacturers, and gaining industry recognition for stable product performance. In the future, facing the development trend of lightweight and high integration of NEVs, the company will continue to optimize material formulas and production processes, develop thinner and lighter composite materials with better shielding efficiency, help high-voltage wire harnesses upgrade to integrated functional subsystems, and inject core power into the high-quality development of the NEV industry.