Device and method for supplying an electrical vehicle with electrical energy

The arrangement has two external connections (4a,4b) for providing a voltage (DC) from a voltage source. An interruption switch (6a) is arranged between one of the external connections and the voltage source. The voltage source consists of at least two batteries (5a-5c) connected in series and at least one further interruption switch (6b) is arranged between the second external connection and the batteries. AN Independent claim is also included for the following: a method of isolating a power supply arrangement consisting of several batteries in series from loads in a motor vehicle.