Patent ID: 8558505

Claim:
A sharing charging system having a plurality of charging stations and a power receiving facility for supplying power to each of the plurality of charging stations, wherein: the power receiving facility comprises: a power supply unit to supply power to each of the plurality of charging stations; and a charge amount control unit to obtain a possible power supply value per vehicle based on a total number of vehicles connected to the plurality of charging stations and available power of the power supply unit when connection information indicating that a vehicle is connected is transmitted from any of the plurality of charging station, and to transmit the possible power supply value to each of the plurality of charging stations; the charging station comprises: a communication unit to transmit the possible power supply value transmitted from the power receiving facility to the vehicle connected to the charging station; a power measuring unit to measure power derived from the power supply unit to the vehicle connected to the charging station; and a control unit to determine based on the power measured by the power measuring unit and the possible power supply value whether the vehicle connected to the charging station is a charge controllable vehicle which derives the power based on the possible power supply value from the power supply unit or a charge uncontrollable vehicle which derives the power not based on the possible power supply value from the power supply unit; when the charge amount control unit determines based on a determination result of the control unit of the plurality of charging stations that only the charge controllable vehicle is connected, the charge amount control unit distributes and supplies the available power of the power supply unit to each of the charge controllable vehicles; and when the charge amount control unit determines based on a determination result of the control unit of the plurality of charging stations that the charge controllable vehicle and the charge uncontrollable vehicle are connected, the charge amount control unit distributes and supplies the available power of the power supply unit to the charge controllable vehicle or the charge uncontrollable vehicle so that total power derived from the charge controllable vehicle and the charge uncontrollable vehicle does not exceed the available power of the power supply unit, and distributes as time division and supplies the available power of the power supply unit to the charge controllable vehicle and the charge uncontrollable vehicle.