Fuel cell module with membrane swelling control structure

A fuel cell module, comprising:

• a membrane electrode assembly (MEA), having a protrusion at a central region of the membrane electrode assembly;
• a pressing plate, pressing on an edge of a cathode of the membrane electrode assembly, and having a first opening to expose the protrusion;
• an anode collector, disposed on an anode of the membrane electrode assembly;
• an anode flow channel plate, disposed on the anode collector, and the anode collector being disposed between the anode and the anode flow channel plate;
• a cathode collector, disposed on the cathode and inside the first opening;
• and
• a cathode flow channel plate, facing the cathode collector and the pressing plate to form a flow channel between an inner surface of the cathode flow channel plate and the cathode collector, wherein the inner surface has a concave portion, a location and a shape of the concave portion corresponds to the protrusion, and a height of the flow channel between an inner surface of the cathode flow channel plate and the cathode collector is substantially identical to a height of the flow channel between an inner surface of the cathode flow channel plate and the pressing plate.