The increasing adoption of electric vehicles (EVs) worldwide has driven the need for advanced, safe, and efficient components that manage power systems in EVs, particularly in charging infrastructure. One such essential component is the IEC 61811 EV Relay. This relay, compliant with the IEC 61811 standard, plays a pivotal role in ensuring the safety, reliability, and efficiency of electric vehicle charging systems by controlling high-voltage electrical circuits.
What is IEC 61811? IEC 61811 is an international standard established by the International Electrotechnical Commission (IEC) for the design, performance, and testing of relays used in various electrical systems. It defines specifications for the relay’s physical, electrical, and mechanical characteristics, ensuring that devices perform reliably and safely in specific applications. For EV systems, these relays are crucial for managing the power flow between the grid, charging station, and the electric vehicle. Role of IEC 61811 EV Relays in Electric Vehicle Charging The IEC 61811 EV Relay is primarily used in the charging circuits of electric vehicles to switch electrical power on and off. This is essential because EVs operate on high-voltage systems (typically 400V to 800V), which require precise control to ensure the safe charging and discharging of the vehicle’s battery. The relay serves as a protective and control mechanism that helps maintain the integrity of the battery and the electrical systems by performing multiple functions：