Water electrolysis module having improved stacking stability

Abstract

There is disclosed a water electrolysis stack in which a current collector, a cathode cell frame, a membrane electrode assembly, and an anode cell frame are sequentially stacked and fastened by a fastening member, wherein the water electrolysis stack has one or more through holes through which the current collector, the cathode cell frame, and the anode cell frame pass, the anode cell frame has a counter bore continued from the through hole and has a greater size than the through hole, and the fastening member includes a head seated on the counter bore, a shaft extending from the head and passing through the through hole, and a hook provided along an outer circumferential surface of one end portion of the shaft and protruding outward from the through hole to provide a compression force in a stacking direction.

Dependencies are inferred from the claim text.