Stop method for fuel cell system and fuel cell system
First Claim
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1. A stop method for a fuel cell system that comprises a fuel cell unit in which hydrogen is supplied to an anode, and air is supplied to a cathode so as to generate electrical power via an electrochemical reaction, the stop method comprising the steps of:
- stopping a supply of hydrogen to the anode;
electrically connecting the anode and the cathode via an electrical load; and
supplying the air to the anode.
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Abstract
A stop method for a fuel cell system including a fuel cell unit in which hydrogen is supplied to an anode, and air is supplied to a cathode so as to generate electrical power via an electrochemical reaction. The stop method includes the steps of stopping supply of hydrogen to the anode, electrically connecting the anode and the cathode via an electrical load, and supplying air to the anode.
22 Citations
12 Claims
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1. A stop method for a fuel cell system that comprises a fuel cell unit in which hydrogen is supplied to an anode, and air is supplied to a cathode so as to generate electrical power via an electrochemical reaction, the stop method comprising the steps of:
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stopping a supply of hydrogen to the anode;
electrically connecting the anode and the cathode via an electrical load; and
supplying the air to the anode. - View Dependent Claims (2, 3)
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4. A stop method for a fuel cell system that comprises a fuel cell unit in which hydrogen is supplied to an anode, and air is supplied to a cathode so as to generate electrical power via an electrochemical reaction, and a hydrogen circulation path through which unreacted hydrogen is returned to the anode, the stop method comprising the steps of:
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stopping a supply of hydrogen to the hydrogen circulation path;
electrically connecting the anode and the cathode via an electrical load when it is determined that a gas pressure in the hydrogen circulation path becomes lower than a predetermined pressure; and
supplying the air to the hydrogen circulation path. - View Dependent Claims (5, 6)
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7. A fuel cell system comprising:
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a hydrogen supply path for introducing hydrogen;
an air supply path for introducing air containing oxygen;
a switching path connected between the hydrogen supply path and the air supply path;
a first valve for opening and closing the hydrogen supply path;
a second valve for opening and closing the switching path;
a fuel cell unit in which hydrogen is supplied to an anode from the hydrogen supply path, and air is supplied to a cathode from the air supply path so as to generate electrical power via an electrochemical reaction;
an electrical load electrically connected between the anode and the cathode; and
a controller for controlling opening and closing of the first valve, opening and closing of the second valve, and connection and termination of an electrical connection between the electrical load, and the anode and the cathode. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification
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Current AssigneeHonda Motor Co., Ltd. (Honda Motor Company)
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Original AssigneeHonda Motor Co., Ltd. (Honda Motor Company)
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InventorsKato, Hideo, Yoshida, Hiromichi, Inai, Shigeru, Matsumoto, Nobuyuki, Jinba, Ryo, Utsunomiya, Masao, Hayashi, Katsumi, Takai, Takahiro
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Application NumberUS11/015,869Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current429/429CPC Class CodesB60L 50/71 Arrangement of fuel cells w...B60L 58/30 for monitoring or controlli...B60L 58/31 for starting of fuel cellsB60L 58/32 for controlling the tempera...B60L 58/33 by coolingH01M 2250/20 Fuel cells in motive system...H01M 8/04097 with recycling of the react...H01M 8/04228 during shut-downH01M 8/04231 Purging of the reactantsH01M 8/04302 applied during start-upY02E 60/50 Fuel cellsY02T 90/40 Application of hydrogen tec...
