Patent ID: 7641993
Filing Date: 2010-01-05
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising: a fuel cell stack; a cathode input line providing cathode input air to the fuel cell stack; an anode input line providing an anode input gas to the fuel cell stack; a cathode output line providing a cathode exhaust gas from the fuel cell stack; an anode exhaust line providing an anode exhaust gas from the fuel cell stack; a mixing junction for mixing the cathode exhaust gas and the anode exhaust gas; and a controller for limiting the concentration of hydrogen in the mixed cathode and anode exhaust gas, said controller maintaining a pressure bias between the anode output line and the cathode output line where the pressure bias maintains the pressure higher in the anode output line than the pressure in the cathode output line so as to maintain the concentration of hydrogen below a predetermined percentage.