FUEL CELL STACK

Abstract: a fuel cell stack includes single cells stacked in a thickness direction. each of the single cells includes a membrane electrode gas diffusion layer assembly and multiple plate-shaped separators sandwiching the membrane electrode gas diffusion layer assembly from opposite sides in the thickness direction. each separator has a hole. the adjacent separators of any two single cells stacked in the thickness direction include a weld portion. specifically, the separators are welded to each other around the entirety of the hole, so as to form the weld portion. the hole of each separator has a shape elongated in a specified direction. each weld portion includes a distant section located in a long part and multiple close sections in the long part. the close sections are closer to the hole than the distant section is to the hole.

Inventor(s): Kunihiro YAMAURA

CPC Classification: H01M8/0276 (PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY)

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