Hongfa America, Inc. provides high-voltage dc (HVDC) relays and contactors for automotive and energy applications across the North American market.
The company’s advanced HVDC relay portfolio includes the HFE82V series, designed for critical functions in electric vehicles (EVs), including main relay control, circuit protection, and fast charging. With continuous current ratings up to 200 A at 750 Vdc (e.g., HFE82V-200D), these relays provide safe, efficient operation in high-voltage EV battery systems.
Applications in EV charging
HFE82V relays are used in onboard and offboard EV charging systems. As main relays, they provide circuit isolation and protection within the vehicle’s high-voltage battery system. They also function as fast charge relays, managing the transfer of high-current dc directly at the battery interface during rapid charging.
Additionally, the relays support safety control by integrating with the vehicle’s battery management system (BMS), which continuously monitors temperature, voltage, and state of charge before permitting current flow.
Features of the HFE82V series
- High sensitivity and load capacity – optimized for stable performance in demanding EV environments.
- Durable construction – designed for long service life and reliable switching.
- Hermetically sealed – ceramic brazing prevents arc leakage, reducing fire and explosion risks.
- Hydrogen gas filling – minimizes oxidation and burnout of contacts, ensuring low and stable resistance.
- Wide EV applications – suitable for main relays, fast charge relays, and battery disconnects.
Other models in the HFE82V series
- HFE82V-60 – 60A rated, compact for auxiliary EV systems
- HFE82V-100B – 100A rated, balance of size and performance
- HFE82V-200B | 200D – 200A rated, common for main battery disconnect and dc fast charging
- HFE82V-300E – 300A rated, higher power EV applications
- HFE82V-400M – up to 400A at 85° C, supporting large-capacity EV battery packs
Filed Under: Technology News