Patent ID: 7846589

Claim:
A fuel cell formed by stacking unit cells, said unit cells each comprising an electrolyte electrode assembly and metal separators stacked in a stacking direction, said electrolyte electrode assembly including a pair of electrodes, and an electrolyte interposed between said electrodes, fluid passages extending through said fuel cell in the stacking direction such that fluids including at least one of a coolant and reactant gases flow through said fluid passages, wherein a first fluid passage has a first opening area extending through at least one side of said separators, and a second fluid passage has a second opening area extending through at least the same side of said separators as the first fluid passage, the first opening area being smaller than the second opening area; and a recess is formed immediately adjacent to the first opening area and extends completely through the separators, the recess extending from one side of one of the separators of said unit cell into the separator and at least a portion of the recess being located between the first opening area and the second opening area; and a cell voltage terminal is provided integrally with the separator in said recess, the cell voltage terminal extending from an interior side of the recess towards an exterior side of the recess such that the cell voltage terminal does not extend outwardly beyond the one side of the separator.