Custom Case of Vehicle Waterproof Solenoid Coil for New Energy Vehicles

Vehicle-mounted solenoid coils are core electronic components for new energy vehicle thermal management, brake control and fluid valve systems, controlling refrigerant circulation, hydraulic braking and gas circuit switching. Exposed to rain immersion, mud corrosion, extreme temperature alternation, driving vibration and on-board electromagnetic interference, automotive coils require IP67 waterproof grade, oil corrosion resistance, wide voltage adaptability and stable magnetic performance. Ordinary commercial coils adopt simple sealing technology, which are prone to water ingress, wire oxidation, magnetic attenuation and delayed switch action after long-term use, causing vehicle system failure and driving safety risks, failing to meet vehicle factory quality standards.

Our cooperative client is a first-tier supporting manufacturer for domestic new energy vehicle OEMs, focusing on automotive fluid control valves and electronic components. Its products are equipped on mass-produced electric and hybrid vehicles. The original matched coils had high failure rates in road tests due to water damage and vibration damage. The client needed customized waterproof solenoid coils with IP67 rating, -40℃~125℃ wide temperature resistance, strong anti-vibration performance and consistent suction parameters, to pass vehicle EMC certification and reduce after-sales failure rate.

Fuying Electronics develops exclusive processing technology for automotive waterproof solenoid coils. We adopt vehicle-grade oil-resistant enameled wires, double closed-loop winding structure to enhance wire adhesion, and vacuum integral epoxy potting technology to realize bubble-free IP67 waterproof protection. Equipped with customized shielding jackets, the coils gain excellent anti-electromagnetic interference performance. Every finished coil undergoes simulated vehicle condition inspection including air tightness, magnetic suction and insulation tests to guarantee unified batch parameters.

After road test and mass loading, our customized coils feature stable action response, long-term magnetic stability and zero water ingress failure, fully passing vehicle EMC and durability certification. The after-sales repair rate of the client’s valve components drops by 92%, meeting the 3-year vehicle warranty standard. We have become the designated long-term supplier, providing customized anti-vibration, waterproof and durable automotive coils for global new energy vehicle manufacturers.