The Electric Vehicle High Voltage Relay (EV HVR) is a critical component in modern electric vehicles (EVs), playing a fundamental role in ensuring both performance and safety. As electric vehicles continue to replace traditional internal combustion engine vehicles, understanding the function and importance of high voltage relays becomes essential for engineers, designers, and EV enthusiasts alike.

    High voltage relays are primarily used to control the connection between the high-voltage battery pack and the electric drivetrain, including the inverter and electric motor. Unlike conventional low-voltage Automotive relays, EV high voltage relays are designed to handle extremely high currents and voltages, often in the range of 200V to 800V or higher, depending on the vehicle’s architecture. Their ability to safely switch such high levels of electricity is vital for both vehicle operation and occupant safety.