Reduzierung eines Spannungsverlusts, der durch ein Pendeln der Spannung bewirkt wird, durch Verwendung einer wiederaufladbaren elektrischen Speichervorrichtung

摘要

A fuel cell system that employs a fuel cell stack and a supplemental power source, such as a battery or an ultra-capacitor. The power source provides supplemental power in addition to the output power of a fuel cell stack for high load demands. The fuel cell system includes a power management controller that controls the power output from the supplemental power source and the fuel cell stack as the demand on the fuel cell stack changes. During low load demands, where the voltage across the fuel cell stack may increase above a potential that could cause oxidation of platinum catalyst particles within the fuel cells in the stack, the power management controller causes the fuel cell stack to charge the power source so as to decrease the voltage output on the stack.