In a DC fast charger, the high voltage DC relay plays a critical role in controlling the flow of electrical power between the charger and the electric vehicle (EV). The relay acts as a switch, connecting or disconnecting the power flow as needed.
When the EV is connected to the charger and ready to receive a charge, the relay is triggered, allowing the flow of high voltage DC power from the charger to the vehicle’s battery. As the battery reaches its charging capacity, the relay will be triggered to disconnect the power flow, stopping the charging process.
The high voltage DC relay must be able to handle the high current and voltage levels involved in fast charging and perform reliably and safely in order to protect both the EV and the charger. Additionally, the relay must be able to switch the power flow quickly to ensure fast and efficient charging times
In summary, the high voltage DC relay in a fast charger acts as a switch that controls the flow of high voltage DC power to the vehicle’s battery, ensuring safe, reliable, and efficient charging.
EV Relay (DC Contactors) products manufactured by Hecheng Electric Company have been maturely used in electric vehicle components.
As follows：
Relay for rapid charging: HCF 100/150/200/250
Relay for general charging: HCF 20/40
Pre-charge relay: HCF 10/20/40
Main relay: HCF 150/200/250/300
Relay for high voltage electrical system auxiliary: HCF 20/40/60
