Patent ID: 7420352

Claim:
A power supply system for a vehicle having an onboard voltage supply system for supplying electric consuming devices, external electric consuming devices being connectable to the onboard voltage supply system, the power supply system comprising: at least one portable removable accumulator chargeable via the onboard voltage supply system of the vehicle; a battery management system, said accumulator being a power accumulator expansion unit controllable via the battery management system and by which at least one of vehicle specific electric consuming devices and external electric consuming devices are operable; wherein the removable accumulator is configured to operate in a stationary power supply mode when coupled with the onboard voltage supply system and in a mobile power supply mode independently of the vehicle when not coupled with the onboard voltage supply system, wherein accumulator-relevant data is bidirectionally exchanged between the removable accumulator and the onboard voltage supply system of the vehicle via the battery management system; and wherein the at least one portable removable accumulator is operatively coupled to the onboard voltage supply system via a support assembly arranged in an interior of the vehicle, when operating in the stationary power supply mode.