Motor vehicle with an electrical connection contact element for a third party start cable and / or for a vehicle-external charger

摘要

The invention relates to a motor vehicle (10) having an electrical connection contact element (15) for a third party start cable and / or a vehicle external charger and to an electrical system (11). The invention provides that the terminal contact element (15) is coupled to a positive line arrangement (12) of the vehicle electrical system (11) via a transistor arrangement (19) which has at least one field-effect transistor (20) and a source electrode (28). the transistor arrangement (19) is electrically connected to the terminal contact element (15) and a drain electrode (27) of the transistor arrangement (19) is electrically connected to the plus line arrangement (12) and a gate circuit (29) is provided for switching the transistor arrangement (19) which is designed to receive a voltage (34) dropping between the source electrode (28) and the drain electrode (27) as a supply voltage and in the event that a voltage potential at the terminal contact element (15) by a predetermined Minimum amount (through-voltage 0.7V) is greater than at the plus-line arrangement (12), at a gate electrode (32) of the transistor arrangement (19) a turn-on voltage (43) for Turning on the transistor arrangement (19) to produce.