| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system with improved corrosion resistance of a fuel cell stack against acid. <P>SOLUTION: The fuel cell system is provided with: a fuel cell stack 2 having a unit cell 20 pinching an electrolyte film with electrodes 22 and equipped with a gas flow channel 23 for leading in reaction gas to the electrodes 22; a pH detection means estimating or detecting a state of a pH value within the fuel cell stack 2; and a control means 36 for controlling water volume in the fuel cell stack 2. When it is judged that an acid degree in the fuel cell stack is high by the pH detection method, the water volume in the fuel cell stack 2 is increased, whereby corrosion due to acid is restrained. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
