Patent ID: 9356304
Filing Date: 2016-05-31
CPC Classification: H01M,Y02E

Claim Text:
1. A fuel cell system comprising: a fuel cell stack; a compressor for providing cathode inlet air to a cathode side of the fuel cell stack; an anode recirculation line for providing an anode exhaust gas from an anode output of the fuel cell stack to an anode input for an anode side of the fuel cell stack; an anode exhaust gas recirculation pump for pumping the anode exhaust gas from the anode output to the anode input; a source providing fresh hydrogen to the anode recirculation line to be mixed with the anode exhaust gas; and a controller that is programmed to control the compressor and the anode recirculation pump, said controller being responsive to a demand for increased output power from the fuel cell stack, said controller limiting a current output ramp up of the fuel cell stack based on how fast the anode recirculation pump can provide the recirculated anode exhaust gas to the anode input for the increased power demand so as to maintain a ratio of fresh hydrogen to recirculated anode exhaust gas substantially constant during a power up-transient.