Power supply system for a vehicle and electrically driven vehicle with demEnergieversorgungssystem

A charger (44) converts electrical energy which is supplied from an AC power supply (60) which is provided externally of a vehicle in a predetermined charging voltage. A relay (46) is provided between the charger (44) and an energy storage device (10). A charging ECU (50) controls the charger (44) and the relay (46). An AC / DC converter (48) converts electrical energy which is supplied from the AC power supply (60) to a predetermined power supply voltage and supplies the electrical energy that has been converted in the power supply voltage, a charging device, consisting of the charger (44), the relay (48) and the charging ECU (50) is constructed. While the energy storage device (10) from the AC power supply (60) is charged, the charging device with the electrical energy, which it receives from the AC / DC converter (48) is operated.