Patent ID: 7351490
Filing Date: 2008-04-01
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 a pair of 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 said separator along a surface of said electrode; a seal structure is provided between said electrolyte electrode assembly and said separator, around at least one of said electrode, said reactant gas supply passage, and said reactant gas discharge passage; said seal structure includes a seal joint and at least first and second seal members connected to said seal joint; an interior angle at said seal joint defined by central lines of said first and second seal members is in a range of 40° to 90°; and said seal joint has a straight portion and a curved portion forming a y-shaped joint, wherein the curved portion originates at a non-terminal location of the straight portion and curves away from the straight portion of said seal joint.