Prevention of flooding of fuel cell stack
AssigneeNissan Motor Co., Ltd.
InventorNaoya Matsuoka
Life of this patent
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Abstract
A fuel cell stack (1) generates power by an electrochemical reaction between hydrogen and oxygen in plural stacked fuel cells (2a, 2b). Each fuel cell (2a, 2b) comprises an anode (26a) to which hydrogen is supplied, a cathode (26b) to which air containing oxygen is supplied, and a electrolyte membrane (20) which conducts hydrogen ions from the anode (26a) to the cathode (26b). The fuel cells (2a, 2b) comprise center cells (2a) and end cells (2b). By arranging the moisture absorption capacity of the end cells (2b) to be larger than that of the center cells (2a), flooding in the end cells (2b) which do not easily rise in temperature is prevented, and the low-temperature start-up performance of the fuel cell stack (1) is enhanced.
Claims33
A fuel cell system comprising:
- a fuel cell stack comprising a plurality of fuel cells stacked in series;
- wherein the fuel cells comprise a first fuel cell disposed in a center position of the fuel cell stack with respect to a stacking direction of the fuel cells, and a second fuel cell disposed in a position other than the center position, the second fuel cell being arranged to have a larger moisture absorption capacity than the first fuel cell.
A fuel cell stack generating electric power through electrochemical reaction of hydrogen and oxygen, comprising:
- a plurality of fuel cells stacked in series, each of the fuel cells comprising an anode to which hydrogen is supplied, a cathode to which air containing oxygen is supplied, and an electrolyte membrane which conducts hydrogen ions from the anode to the cathode;
- wherein the fuel cells comprise a first cell disposed in a center position of the fuel cell stack with respect to a stacking direction of the fuel cells, and a second cell disposed in a position other than the center position, the second cell being arranged to have a larger moisture absorption capacity than the first cell.
A fuel cell stack which generates power by an electrochemical reaction between hydrogen and oxygen, comprising:
- a plurality of fuel cells stacked in series, each of the fuel cells comprising an electrode and a gas passage facing the electrode;
- wherein the fuel cells comprise a first cell disposed in a center position of the fuel cell stack in the stacking direction of the fuel cells, and a second cell disposed in a position other than the first cell, and the gas passage of the second cell has a larger cross-sectional area than the gas passage of the first cell.
Dependencies are inferred from the claim text.