US Patent 8344686 Method and a device for charging electric vehicles

A method for charging electric vehicles through connecting an electric vehicle to a charging station for receiving electric energy. Different power supply offers can be selected particularly simple in that at least a state of charge of a battery and a desired duration of charge is determined in the vehicle, the energy required for fully charging the battery is determined in the vehicle, at least information concerning the required energy and the duration of charge is transmitted to the charging station by the vehicle and at least one power supply offer adapted to the information is received by the vehicle from the charging station which power supply offer has been determined from among a plurality of different power supply offers by means of the charging station using the information received.