Stop method for fuel cell system
AssigneeHonda Motor Co., Ltd.
InventorsShigeru INAI, Katsumi HAYASHI, Ryo JINBA, Hideo KATO, Tomoki KOBAYASHI, Minoru UOSHIMA, Yasunori KOTANI
Life of this patent
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Abstract
A stop method for a fuel cell system that includes 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, and supplying air to the anode so as to discharge water remaining at the anode.
Claims10
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 supply of hydrogen to the anode;
- and
- supplying air to the anode so as to discharge water and unreacted hydrogen remaining at the anode, wherein
- the fuel cell system comprises a dilution unit in which an off-gas, containing the unreacted hydrogen and air, discharged from the anode is mixed with air discharged from the cathode, and,
- in the step of supplying air to the anode, a portion of air to be supplied to the cathode is branched into the anode.
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 recycled, the stop method comprising the steps of:
- stopping supply of hydrogen to the hydrogen circulation path;
- and
- supplying air to the hydrogen circulation path so as to discharge water and unreacted hydrogen remaining at the anode, wherein
- the fuel cell system comprises a dilution unit in which an off-gas, containing the unreacted hydrogen and air, discharged from the anode is mixed with air discharged from the cathode, and,
- in the step of supplying air to the hydrogen circulation path, a portion of air to be supplied to the cathode is branched into the hydrogen circulation path.
Dependencies are inferred from the claim text.