Patent ID: 9059442
Filing Date: 2015-06-16
Classification: H01M,Y02E

Abstract:
1. A fuel cell formed by stacking a membrane electrode assembly and separators together upright in a horizontal direction, the membrane electrode assembly including a pair of electrodes and an electrolyte membrane interposed between the electrodes, a reactant gas flow field for supplying a reactant gas along an electrode surface and a reactant gas passage for flowing the reactant gas in the stacking direction of the membrane electrode assembly and the separator being formed in the separator, wherein a connection channel connecting the reactant gas flow field and the reactant gas passage is provided; the connection channel has a plurality of through holes extending through the separator; a first channel seal is provided on one surface of the separator around the reactant gas passage and the through holes, and a second channel seal is provided on the other surface of the separator around the through holes and the reactant gas flow field; and the through holes are arranged in a direction of gravity, and among the through holes, one through hole at the lowermost position has an opening elongated downward to have an opening area larger than opening areas of other through holes which are positioned above and adjacent to the one through hole at the lowermost position.