Patent ID: 9160020
Filing Date: 2015-10-13
Classification: H01M,Y02E

Abstract:
1. A fuel cell comprising: a first electrode catalyst layer laid on an anode side surface of an electrolyte membrane; a second electrode catalyst layer laid on a cathode side surface of the electrolyte membrane; a first gas passage forming member that is laid on a surface of the first electrode catalyst layer and has a first gas passage for supplying fuel gas; a second gas passage forming member that is laid on a surface of the second electrode catalyst layer and has a second gas passage for supplying oxidization gas; a first separator arranged in the first gas passage forming member; a second separator laid on a surface of the second gas passage forming member; an introducing passage and a discharging passage for the fuel gas; and an introducing passage and a discharging passage for the oxidization gas; wherein the second gas passage forming member is configured by a flat plate, a plurality of first projections that are formed on the flat plate to form the second gas passage, and a plurality of second projections that are formed on the flat plate to form the water passage, and the first projections and the second projections project toward the opposite sides of the second gas passage forming member, a water passage is formed between a surface of the flat plate of the second gas passage forming member and a backside of the second separator corresponding to the second gas passage forming member, the water passage and the second gas passage are formed on the opposite sides of the second gas passage forming member and communicate with each other through a communication hole formed by each of the first projections that are shaped by cutting and raising in the second gas passage forming member, the water passage has a depth set to a value smaller than depth of the second gas passage, and water drawn from the second gas passage into the water passage through capillary action via the communication holes is drained to the oxidation gas discharging passage by pressure caused by the oxidization gas flowing in the second gas passage.