Fuel cell, fuel cell stack, and fuel cell system
First Claim
1. A fuel cell stack comprising a plurality of fuel cells stacked in series along a direction vertical to a main surface of each fuel cell, and each fuel cell comprising:
- an anode;
a cathode;
an electrolyte membrane sandwiched between the anode and the cathode; and
a pair of the separators by which the anode, the cathode, and the electrolyte membrane are sandwiched, wherein a water collecting groove, configured to collect water generated by electrochemical reaction in the fuel cell, is formed in a bottom area of an inner surface of the separator in each fuel cell, and the bottom of the water collecting groove is formed lower in position than a bottom end of each of the electrolyte membrane, the anode, and the cathode.
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Accused Products
Abstract
A fuel cell stack has plural fuel cells stacked in series along a direction vertical to a main surface of each fuel cell. Each fuel cell has a lamination body made of an anode, a cathode, and a polymer proton exchange membrane. The lamination body is sandwiched between a pair of separators. Each of the anode and cathode has a catalyst layer and a diffusion layer laminated. A water collecting groove and fuel gas passages are formed in the inner surface of each separator. The bottom end of the water collection groove is lower in position than the end of the catalyst layer and the diffusion layer. The water collecting groove is not joined to the fuel gas passages and collects water produced by electrochemical reaction in each fuel cell, and drains the collected water.
10 Citations
18 Claims
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1. A fuel cell stack comprising a plurality of fuel cells stacked in series along a direction vertical to a main surface of each fuel cell, and
each fuel cell comprising: - an anode;
a cathode;
an electrolyte membrane sandwiched between the anode and the cathode; and
a pair of the separators by which the anode, the cathode, and the electrolyte membrane are sandwiched,wherein a water collecting groove, configured to collect water generated by electrochemical reaction in the fuel cell, is formed in a bottom area of an inner surface of the separator in each fuel cell, and the bottom of the water collecting groove is formed lower in position than a bottom end of each of the electrolyte membrane, the anode, and the cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- an anode;
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18. A fuel cell comprising:
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an electrolyte membrane made of a polymer proton exchange membrane sandwiched between an anode and a cathode;
the anode made of a diffusion layer and a catalyst layer;
the cathode made of a diffusion layer and a catalyst layer; and
a pair of separators by which a lamination body made of the anode, the electrolyte membrane, and the cathode laminated is sandwiched, and at least one separator having a water collecting groove, configured to collect water generated by electrochemical reaction, formed in a bottom area of the inner surface of the separator and lower in position than a bottom end of each of the electrolyte membrane, the anode, and the cathode.
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Specification