Patent ID: 7488550
Filing Date: 2009-02-10
Classification: H01M,Y02E

Abstract:
1. A fuel cell, comprising: an electrolyte electrode assembly including a pair of electrodes and an electrolyte interposed between said electrodes; and metal separators for sandwiching said electrolyte electrode assembly, wherein a reactant gas supply passage, and a reactant gas discharge passage extend through said fuel cell in a stacking direction of said fuel cell; a reactant gas flow field is connected between said reactant gas supply passage and said reactant gas discharge passage on at least one of said metal separators along a surface of said electrode; and a seal member provided integrally on said metal separator, around at least one of said electrode, said reactant gas supply passage, and said reactant gas discharge passage, said seal member including: a substantially flat base portion formed integrally on said metal separator; a columnar portion, narrower than the base portion, protruding from said base portion, wherein the columnar portion is attached to the base portion by a curved transition region; and a curved edge portion provided on an end of said columnar portion, and having a predetermined curvature, wherein said curved edge portion of said seal member contacts said electrolyte.