| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel cell stack capable of preventing the corrosion of a power terminal board due to a cooling liquid, of eliminating a problem of liquid junction and of increasing the degree of freedom for selecting the cooling liquid. SOLUTION: In this fuel cell stack, plural unit fuel cells each having an anode-side electrode and a cathode-side electrode oppositely attached to both sides of a solid high-polymer electrolyte film are stacked through first and second separators and a pair of terminal boards 26 for extracting output power to both its end faces are mounted. Communicating holes 18 on the feed side of a cooling liquid and communicating holes 19 on the drain side thereof or communicating holes 14-17 on the feed side of an oxidizer gas and a fuel gas and on the exhaust side of the oxidizer gas and the fuel gas are penetratingly formed in the stacking direction of the unit fuel cells. The circumferences of the communicating holes 18 and 19 formed in the terminal boards 26 are covered with insulating grommets 46, and the circumferences of the respective communicating holes 14-17 are covered with insulating grommets 50. |
