摘要 |
A fuel cell ( 1 ) comprises an anode ( 9 A) and cathode ( 9 B) disposed on either side of a solid polymer electrolyte membrane ( 8 A), and power is generated by supplying hydrogen to the anode ( 9 A) and supplying hydrogen to the cathode ( 9 B). When the temperature of the fuel cell ( 1 ) is below 0° C., water in the cell freezes. When a power plant using the fuel cell ( 1 ) is warmed up under the temperature less than 0° C., the anode ( 9 A) is connected to the positive electrode of a secondary battery ( 13 ) and the cathode ( 9 B) is connected to the negative electrode of the secondary battery ( 13 ) to electrolyze frozen water in the cell, thereby thawing the frozen water using the heat accompanying the electrolysis. |