Relay device and electric vehicle charging controller comprising same

An electric vehicle charging controller comprising:

• a first signal detection unit connected to a first signal line and configured to detect a first charging sequence signal;
• a second signal detection unit connected to a second signal line and configured to detect a second charging sequence signal;
• a relay unit in which a switch operates according to a magnitude of a voltage applied to a coil;
• a first control unit configured to control the voltage applied to the coil by turning on and off a first switching element according to a first control signal;
• a first discharge unit and a second discharge unit configured to discharge a back electromotive force generated in the coil when the relay unit is turned off;
• and
• a second control unit including a second switching element, wherein the second switching element is configured to be turned on or off based on a second control signal to select whether the back electromotive force generated in the coil is discharged through the first discharge unit or the second discharge,
• wherein the coil is disposed between the first signal line and the second signal line, and has one end connected to a relay of a junction box.