HYDROGEN SENSOR CELL FOR DETECTING FUEL STARVATION

摘要

A fuel cell stack includes at least one fuel cell having a fuel inlet for directing a hydrogen fuel to the fuel cell to generate electric current; a sensor cell having an anode flow field, a cathode flow field and an unitized electrode assembly between the anode flow field and the cathode flow field, the anode flow field being communicated with the fuel inlet to receive a portion of fuel from the fuel inlet, the sensor cell being connected in series with the stack to carry the electric current whereby hydrogen from the portion of fuel is evolved into the cathode flow field of the sensor cell; and a sensor communicated with the sensor cell to receive a signal corresponding to content of hydrogen in the sensor cell.