Patent ID: 7847513

Claim:
A fuel cell system comprising: a fuel cell stack; a power source; a power damping processor responsive to a driver request signal and providing a damped driver request signal; a subtractor responsive to a predetermined power source state of charge (SOC) set-point signal and an actual power source SOC signal, said subtractor providing a difference signal between the SOC set-point and the actual power source SOC; an SOC controller responsive to the difference signal and generating a power source SOC signal; an adder adding the damped power request signal and the power source SOC signal to provide a fuel cell system power signal; and a power balancing module responsive to the fuel cell system power signal and determining how much power is provided by the fuel cell stack, how much power is provided by the battery and how much fuel cell stack power is used to recharge the battery during low power and high power transients.