Charging device and method thereof

A charging device for receiving an alternating current (AC) voltage from a power supply device and charging a vehicle, the charging device comprising:

• a power supply cabinet, coupled to the power supply device, for converting the AC voltage received from the power supply device to obtain a power supply cabinet output voltage;
• a first connection cable, coupled to the power supply cabinet;
• and
• a terminal gun cabinet, coupled to the first connection cable, wherein the terminal gun cabinet is connected to and communicates with the power supply cabinet via the first connection cable, and the power supply cabinet supplies a terminal input voltage to the terminal gun cabinet through the first connection cable;
• wherein,
• a detection circuit of the terminal gun cabinet detects the terminal input voltage of the terminal gun cabinet;
• based on a detection result of the terminal gun cabinet, a control unit of the terminal gun cabinet determines whether the terminal input voltage of the terminal gun cabinet has reached a terminal target value;
• and
• based on a determination result of the terminal gun cabinet, the terminal gun cabinet decides whether to notify a control unit of the power supply cabinet to perform voltage compensation until the control unit of the terminal gun cabinet determines that the terminal input voltage of the terminal gun cabinet has reached the terminal target value.