Fuel cell system and method of operating said fuel cell

摘要

A fuel cell system (300) comprises multiple fuel cells (25) forming a fuel cell stack (200) with output terminals (302) to provide electric power to a load (305) in a load circuit. The fuel cells (25) at each end of the stack (200) are electrically connected to an end-cell circuit (312), whereas the remaining fuel cells of the stack are electrically connected to the output terminals (302). The end-cell circuit (312) may be arranged so that the current density is no more than 0.2 times the current density in the remaining fuel cells. This has been found to suppress deterioration of the fuel cells (25).