Fuel cell stack and method of warming up the same

摘要

A fuel cell stack is formed by stacking a plurality of fuel cells. A heating mechanism is provided for heating an outermost fuel cell by external electrical energy. A power generation circuit including electric heaters corresponding to the fuel cells is provided. Further, a switching mechanism including switches for selectively connecting the fuel cells to the power generation circuit or selectively disconnecting the fuel cells from the power generation circuit is provided.