Patent ID: 7867666
Filing Date: 2011-01-11
Classification: H01M,Y02E

Abstract:
1. A fuel cell formed by stacking an electrolyte electrode assembly and metal separators alternately, said electrolyte electrode assembly including a pair of electrodes and an electrolyte interposed between said electrodes, wherein a reactant gas supply passage and a coolant passage extend through said fuel cell in a stacking direction of said fuel cell; a reactant gas flow field is formed on a first surface of said metal separator for supplying a reactant gas along an electrode surface, and a coolant flow field is formed on a second surface of said metal separator opposite to the first surface for supplying a coolant along the second surface of said metal separator; said metal separator includes a first triangular buffer formed on the first surface of the separator and a second triangular buffer formed on the second surface of the separator, wherein the first substantially triangular buffer and the second substantially triangular buffer overlap to form a single substantially triangular buffer; and said single buffer has a first side connected to said reactant gas supply passage on said first surface of said metal separator, and a second side connected to said coolant passage on said second surface of said metal separator, and a third side connected to said reactant gas flow field on the first surface of the metal separator, wherein the third side of the single buffer is connected to said coolant flow field on the second surface of said metal separator.