FUEL CELL STACK HUMIDIFICATION METHOD INCORPORATING AN ACCUMULATION DEVICE

摘要

A fuel cell system including a fuel cell stack (10), having first and second openings (12) and (14) which serve as inlet and outlet anode gas openings connected to passages (18) and (20). Passages (18) and (20) are provided with venturi tubes (22) and (24) which are in fluid communication with a respective expansion reservoir (26) and (28). The system provides for feeding back humid anode exhaust gas of the fuel cell stack (10) to the fuel cell inlet and switching the anode inlet and outlet of the fuel cell stack for achieving better homogeneity of humidity.