Charging control device

A charging control device comprising:

• a battery for driving an electric vehicle;
• a driving DC line on each of a positive electrode side and a negative electrode side, through which electric power of the battery is supplied to an inverter;
• a main contactor on each of the positive electrode side and the negative electrode side that is provided in the driving DC line between the battery and the inverter to disconnect or connect the driving DC line;
• a charging connector that is connected to a power supply connector through which electric power is supplied to the battery from an external power source;
• a charging DC line on each of the positive electrode side and the negative electrode side that branches from the driving DC line on each of the positive electrode side and the negative electrode side, between the main contactor and the inverter, and that is connected to the charging connector;
• a charging contactor on each of the positive electrode side and the negative electrode side that is provided in the corresponding charging DC line on each of the positive electrode side and the negative electrode side to disconnect or connect the charging DC line;
• a control unit that controls the main contactor and the charging contactor;
• a voltage-between-terminals measurement unit that measures voltage between the charging DC lines on the positive electrode side and the negative electrode side, or voltage between terminals of the charging connector;
• a connector locking unit that locks connection between the charging connector and the power supply connector if the voltage between the terminals is more than a threshold voltage;
• and
• a melting determination section that determines whether the charging contactor melts on the basis of whether the voltage between the terminals is more than the threshold voltage,
• wherein the control unit disconnects the main contactor if the melting determination section determines that the charging contactor melts.