Voltage-time behavior of a polymer electrolyte membrane fuel cell stack at constant current discharge

摘要

Empirical equations were developed to describe the voltage-time behavior of polymer electrolyte membrane fuel cell (PEMFC) stacks at constant current discharge. When either ambient temperature or discharge current is too high, the experimental voltage-time curves exhibit rapidly falling cell voltage within s short discharge time. Various experimental voltage-time curves have been fitted very well with empirical equations at different discharge currents and ambient temperatures.