Fuel cell stack

A fuel cell stack, comprising:

• a plurality of generators each comprising:
• a membrane-electrode assembly (MEA);
• a first separator on one side of the MEA and having an oxidant hole for receiving an oxidizing agent;
• and
• a second separator on the other side of the MEA having a fuel channel on a side facing the MEA,
• wherein the plurality of generators are consecutively on different locations of a same plane, respectively, the same plane substantially parallel to at least one of the one side or the other side of the MEA;
• a first fastening plate on one side of the generators for covering the first separators;
• and
• a second fastening plate on the other side of the generators for covering the second separators,
• wherein the first fastening plate comprises a beading unit configured as a bent portion of the first fastening plate, the beading unit protruding from the first fastening plate in a thickness direction of the first fastening plate, the thickness direction substantially perpendicular to the same plane, and
• wherein the first separator comprises a second beading unit configured as a bent portion of the first separator, the second beading unit protruding from the first separator in a thickness direction of the first separator, the second beading unit matching a concave portion of the beading unit of the first fastening plate.