DISCONNECTING PROCEDURE FOR FUEL CELL SYSTEMS

摘要

The invention relates to a method for disconnecting a fuel cell system comprising at least one fuel cell (2), especially a fuel cell (2) provided with a proton exchanging membrane (6), anode and cathode inlets (7, 8), anode and cathode outlets (12, 17), an anode recirculation circuit (13), a device (15) which is operated according to the Venturi principle and is used to convey the gas in the anode recirculation circuit (13), and a hydrogen and air supply (1, 10). The aim of the invention is to provide a method characterised by low emission values and high efficiency. To this end, the hydrogen supply to the anode (4) is interrupted during the disconnection and the current generated from the residual hydrogen is supplied to an electric consumer.