Patent ID: 6743538
Filing Date: 2004-06-01
Classification: H01M,Y02E

Abstract:
A fuel cell system comprising:a fuel cell having an anode space and a cathode space, which are separated from one another by a proton-conducting membrane; a cathode feed line for feeding oxygen-containing gas to the cathode space; a cathode exhaust-gas line; an anode line for feeding and discharging an operating medium to the anode-space inlet and from the anode-space outlet; a device for determining a temperature; a device for metering and feeding said operating medium to the cathode space as a function of the determined temperature; and a control unit coupled to control operation of said device for metering and feeding said operating medium, said control unit being programmed to continue operation of said device for metering and feeding said medium as a function of the determined temperature, for a predetermined time period after the fuel cell system is switched off until a uniform operating medium concentration has been achieved in the fuel cell system.