WO2006054424A1 - 燃料電池システム - Google Patents
燃料電池システム Download PDFInfo
- Publication number
- WO2006054424A1 WO2006054424A1 PCT/JP2005/019503 JP2005019503W WO2006054424A1 WO 2006054424 A1 WO2006054424 A1 WO 2006054424A1 JP 2005019503 W JP2005019503 W JP 2005019503W WO 2006054424 A1 WO2006054424 A1 WO 2006054424A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel cell
- gas
- exhaust pipe
- pipe
- hydrogen
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
- H01M8/04231—Purging of the reactants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04197—Preventing means for fuel crossover
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a fuel cell system, and more particularly to a technology for detecting a specific component concentration in a gas discharged from a fuel cell camera.
- a hydrogen detector for example, a gas catalytic combustion type hydrogen sensor
- a hydrogen detector is installed in the exhaust system on the power sword side to detect the hydrogen concentration in the power sword off-gas (reacted air discharged from the power sword). And then.
- the hydrogen detector is installed in the exhaust pipe of the power sword-off gas, the hydrogen detector is always exposed to the detection target gas having a relatively high hydrogen concentration, and therefore the life of the hydrogen detector is shortened.
- the power sword off gas contains a large amount of water droplets such as produced water and water vapor, there are problems such as breakage, deterioration and deterioration of detection accuracy due to dew condensation of the hydrogen detector.
- Patent Document 1 a secondary flow path (bypass pipe) for sensing is provided in the exhaust pipe of the force sword off gas, and a hydrogen detector is installed in the secondary flow path to control the flow rate. Therefore, an apparatus is disclosed in which an optimal flow rate is supplied to the hydrogen detector to improve detection accuracy. In this case, since the flow rate of the detection target gas can be controlled, the amount of reaction between the hydrogen detector and the detection target gas can be reduced, and as a result, the life of the hydrogen detector can be extended.
- Patent Document 2 provides a heater that heats the detection target gas adjacent to the upstream side of the hydrogen detector (gas sensor) to prevent condensation of the hydrogen detector. It is disclosed that damage, deterioration, and detection accuracy decrease are prevented.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2003-297403
- Patent Document 2 Japanese Patent Application Laid-Open No. 2004-069436
- the present invention uses a device in the fuel cell system to detect the life of the component concentration detector when detecting the specific component concentration in the exhaust gas of the fuel cell system.
- An object is to provide a fuel cell system capable of preventing condensation.
- the gas that is supplied into the fuel cell case that houses the fuel cell and ventilates the fuel cell is a gas that is relatively dry from the detection target gas even after ventilation.
- the fuel cell ventilation outlet pipe through which the gas flows after ventilating the fuel cell is joined to the exhaust pipe of the fuel cell, and the component concentration detector is installed in the fuel cell ventilation outlet pipe.
- a flow path control device capable of controlling the gas flow is installed on the upstream side. And when detecting the specific component concentration of the gas flowing through the exhaust pipe, the flow control device is controlled to limit the amount of gas flowing from the fuel cell ventilation outlet pipe to the exhaust pipe through the component concentration detector
- the amount of gas flowing to the exhaust pipe through the fuel cell ventilation outlet piping force component concentration detector is limited to flow through the exhaust pipe. If it is not necessary to detect the gas flowing through the exhaust pipe by introducing a part of the gas to the component concentration detector, the component concentration detector becomes relatively high by flowing the fuel cell ventilation gas through the component concentration detector. Since the gas flowing through the exhaust pipe with high hydrogen concentration and high temperature is not touched at all times, the life of the component concentration detector can be extended and condensation can be prevented.
- FIG. 1 is a block diagram showing a first embodiment of a fuel cell system according to the present invention.
- FIG. 2 is a configuration diagram showing a second embodiment of the fuel cell system according to the present invention.
- FIG. 3 is a configuration diagram showing a third embodiment of the fuel cell system according to the present invention.
- FIG. 1 is a configuration diagram showing a first embodiment of a fuel cell system according to the present invention.
- the fuel cell 1 is a polymer electrolyte fuel cell, for example, and includes a cell formed by sandwiching a solid polymer electrolyte membrane through which hydrogen ions pass between an anode (fuel electrode) and a force sword (oxidant electrode).
- a stacker composed of a plurality of stacked layers.
- Hydrogen is supplied from the hydrogen supply pipe 2 as fuel to the anode of the fuel cell 1, and air is supplied from the air supply pipe 3 as oxidant to the force sword.
- the hydrogen ions generated by the catalytic reaction at the anode pass through the solid polymer electrolyte membrane and move to the power sword.
- the force sword causes an electrochemical reaction with oxygen to generate electricity and generate water.
- the reacted air on the power sword side flows to the exhaust pipe 4 as off-gas and is discharged to the atmosphere.
- a fuel cell case 5 is provided so as to cover the fuel cell 1, and fuel cell ventilation gas is supplied into the fuel cell case 5 from the fuel cell ventilation inlet pipe 6.
- the fuel cell ventilation inlet pipe 6 may be provided by branching from an air supply pipe (an air supply pipe downstream of the compressor that supplies air to the power sword of the fuel cell 1) 3, or a ventilation gas such as air is supplied to the fuel cell.
- a new line may be provided for case 5.
- the gas after ventilating the fuel cell 1 is discharged from the fuel cell ventilation outlet pipe 7.
- the fuel cell ventilation outlet pipe 7 is joined to the exhaust pipe 4 at the downstream end thereof.
- a gas contact combustion type hydrogen sensor 8 is installed as a component concentration detector in the middle of the fuel cell ventilation outlet pipe 7 at a position relatively close to the junction with the exhaust pipe 4.
- An on-off valve 9 that can open and close the flow path, such as a butterfly valve, is installed as a flow path control device upstream of the hydrogen sensor 8 in the fuel cell ventilation outlet pipe 7.
- the opening / closing of the on-off valve 9 is controlled by a control means 10 such as a microcomputer.
- the hydrogen concentration is detected by reading the signal from the hydrogen sensor 8 corresponding to the above.
- the fuel cell ventilation gas flows to the hydrogen sensor 8 by closing the on-off valve 9 of the fuel cell ventilation outlet pipe 7. Do not.
- the supply of the fuel cell ventilation gas from the fuel cell ventilation inlet pipe 6 to the fuel cell case 5 is temporarily stopped. In this state, a part of the gas flowing through the exhaust pipe 4 is guided to the hydrogen sensor 8, and the hydrogen concentration in the exhaust pipe 4 can be detected.
- the on-off valve 9 is opened except when the hydrogen concentration in the exhaust pipe 4 is detected.
- the hydrogen sensor 8 has a relatively high hydrogen concentration, and the gas in the exhaust pipe 4 cannot be constantly touched. Degradation rate can be suppressed.
- the exhaust gas of the fuel cell 1 flowing through the exhaust pipe 4 contains a large amount of moisture due to the characteristics of the system, but the gas in the fuel cell ventilation outlet pipe 7 is warmed by the heat generated by the fuel cell 1. Since the gas is dried at a high temperature, the surrounding gas of the hydrogen sensor 8 can be maintained as a high temperature dry gas except when the hydrogen concentration in the exhaust pipe 4 is detected. As a result, the hydrogen sensor 8 has an anti-condensation effect and is easy to condense in a low-temperature environment! / Even when used in an environment, the fuel cell ventilation gas is selectively supplied to provide a large amount of moisture. The contained gas can be shut off and condensation can be prevented.
- the heat of the fuel cell 1 is used to heat the hydrogen sensor 8, so no additional device or energy for heating is required, thus simplifying the system. And efficient use of energy.
- a part of gas (air) compressed by the compressor supplied to the fuel cell 1 is used for ventilation of the fuel cell 1 By flowing this through the hydrogen sensor 8, warm-up of the hydrogen sensor 8 can be promoted at low temperature startup or the like.
- the hydrogen concentration in the exhaust pipe 4 when the hydrogen concentration in the exhaust pipe 4 is not detected, the hydrogen concentration in the fuel cell ventilation outlet pipe 7 can be detected.
- one hydrogen sensor 8 can detect the hydrogen concentration in the exhaust pipe 4. It is also possible to selectively detect the hydrogen concentration in the fuel cell and the hydrogen concentration in the fuel cell ventilation outlet pipe 7 as necessary.
- FIG. 2 is a configuration diagram showing a second embodiment of the fuel cell system according to the present invention.
- a binos pipe 11 is added to the first embodiment, which connects the upstream side of the on-off valve 9 of the fuel cell ventilation outlet pipe 7 and the exhaust pipe 4 by bypassing the hydrogen sensor 8. is doing
- the fuel cell ventilation gas when the hydrogen concentration in the exhaust pipe 4 is detected, the supply of the fuel cell ventilation gas is temporarily stopped to close the on-off valve 9 of the fuel cell ventilation outlet pipe 7.
- the fuel cell ventilation gas can be discharged from the bypass pipe 9 to the exhaust pipe 4 even if the on-off valve 9 of the fuel cell ventilation outlet pipe 7 is closed.
- the effect of the first embodiment can be obtained without stopping the supply of gas. That is, the gas in the exhaust pipe 4 can be detected without stopping the ventilation of the fuel cell case 5.
- the hydrogen sensor 8 can be installed in the bypass pipe 11. It is necessary to provide a flow control device such as an open / close valve in the bypass pipe 11, and the final exhaust gas released to the atmosphere is Since the fuel cell ventilation gas is a gas after merging into the exhaust pipe 4, it is desirable that the hydrogen sensor 8 be installed downstream of the merging point of the fuel cell ventilation gas as configured in this embodiment. In other words, in this embodiment, the final exhaust gas discharged to the atmosphere is released by setting the junction of the bypass pipe 11 upstream from the junction of the fuel cell ventilation outlet pipe 7 including the hydrogen sensor 8. It becomes possible to detect the hydrogen concentration.
- the pipe diameter (passage area) of the bypass pipe 11 is made smaller than the pipe diameter (passage area) of the fuel cell ventilation outlet pipe 7. In this way, the fuel cell ventilation gas can efficiently flow to the hydrogen sensor 8 without adding new control such as a valve. If this size relationship is observed, the pipe diameter ratio can be freely determined according to the purpose. For example, the ability to improve detection accuracy The pipe diameter ratio to allow the optimal flow rate to the hydrogen sensor 8 Is also possible. Needless to say, the diameter of the pipe may be adjusted by providing an orifice with an optimum diameter in the bypass pipe 11.
- the on / off valve 9 is provided upstream of the hydrogen sensor 8 in the fuel cell ventilation outlet pipe 7 after the bypass pipe 11 is branched.
- a three-way valve may be provided at the branch portion.
- FIG. 3 is a configuration diagram showing a third embodiment of the fuel cell system according to the present invention.
- dew condensation detection means 12 is added to the vicinity of the hydrogen sensor 8 in the fuel cell ventilation outlet pipe 7 in the second embodiment.
- the dew condensation detection means 12 As the dew condensation detection means 12, the humidity of the gas flowing through the exhaust pipe 4, particularly the humidity of the gas flowing through the exhaust pipe 4 and reaching the hydrogen sensor 8 (the hydrogen sensor 8 in the fuel cell ventilation outlet piping 7 Using a hygrometer that measures (humidity) and a thermometer that measures the temperature of Z or the hydrogen sensor 8, these signals are input to the control means 10.
- the control means 10 when the humidity in the vicinity of the downstream side of the hydrogen sensor 8 is equal to or higher than a predetermined humidity, and when the temperature of Z or the hydrogen sensor 8 is equal to or lower than the predetermined temperature, it flows through the exhaust pipe 4 containing a large amount of moisture. Judging that the water temperature sensor 8 is likely to condense due to the gas, stop the detection of the hydrogen concentration in the exhaust pipe 4 by the hydrogen sensor 8, and open the on-off valve 9 of the fuel cell ventilation outlet pipe 7 Then, the fuel cell ventilation gas dried at a high temperature is supplied to the hydrogen sensor 8, and the hydrogen sensor 8 is heated and dried.
- the predetermined humidity is, for example, a case where the humidity is 50% when the force sword-off gas is 40 ° C., and the hydrogen sensor temperature is about 30 ° C. as the predetermined temperature.
- the hydrogen sensor 8 under the condition that the hydrogen sensor 8 is easily condensed by the gas flowing through the exhaust pipe 4 by the control means 10, the gas in the fuel cell ventilation outlet pipe 7 passes through the hydrogen sensor 8 and the exhaust pipe.
- the on-off valve 8 By controlling the on-off valve 8 so that it flows to 4, even in the environment where condensation is likely to occur, even if the hydrogen sensor 8 starts to condense due to a gas containing a large amount of moisture, it prevents condensation by supplying the fuel cell replacement gas As a result, it is possible to prevent damage to the hydrogen sensor 8 due to condensation, deterioration, deterioration of detection accuracy, and even detection failure. wear.
- the hydrogen sensor is likely to condense by the gas flowing in the exhaust pipe.
- the conditions are that at least the humidity in the vicinity of the hydrogen sensor 8 is equal to or higher than the predetermined humidity, and Z or the hydrogen sensor 8
- the amount of gas flowing to the exhaust pipe via the component concentration detector such as the fuel cell ventilation outlet pipe is limited. If it is not necessary to detect the gas flowing through the exhaust pipe by introducing a part of the gas flowing through the exhaust pipe to the component concentration detector, the fuel cell ventilation gas is passed through the component concentration detector. Since the detector does not always touch the gas flowing through the exhaust pipe having a relatively high hydrogen concentration and high temperature, the life of the component concentration detector can be extended and condensation can be prevented.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004331353A JP2006147151A (ja) | 2004-11-16 | 2004-11-16 | 燃料電池システム |
JP2004-331353 | 2004-11-16 |
Publications (1)
Publication Number | Publication Date |
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WO2006054424A1 true WO2006054424A1 (ja) | 2006-05-26 |
Family
ID=36406969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/019503 WO2006054424A1 (ja) | 2004-11-16 | 2005-10-24 | 燃料電池システム |
Country Status (2)
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JP (1) | JP2006147151A (ja) |
WO (1) | WO2006054424A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020181751A1 (zh) * | 2019-03-14 | 2020-09-17 | 中山大洋电机股份有限公司 | 燃料电池尾排氢气浓度检测装置及燃料电池和新能源汽车 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5743792B2 (ja) | 2011-08-03 | 2015-07-01 | 本田技研工業株式会社 | 燃料電池システム |
JP6496233B2 (ja) * | 2015-10-21 | 2019-04-03 | 本田技研工業株式会社 | 燃料電池車両 |
EP4187655A1 (de) * | 2021-11-29 | 2023-05-31 | Airbus Operations GmbH | Brennstoffzellensystem mit aktiver gehäusespülung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6252864A (ja) * | 1985-08-30 | 1987-03-07 | Hitachi Ltd | 燃料電池 |
JPH02312162A (ja) * | 1989-05-26 | 1990-12-27 | Fuji Electric Co Ltd | 燃料電池のガス漏れ防止装置 |
JP2003297403A (ja) * | 2002-03-29 | 2003-10-17 | Honda Motor Co Ltd | 水素検出装置 |
JP2004020332A (ja) * | 2002-06-14 | 2004-01-22 | Honda Motor Co Ltd | ガスセンサの較正方法 |
-
2004
- 2004-11-16 JP JP2004331353A patent/JP2006147151A/ja active Pending
-
2005
- 2005-10-24 WO PCT/JP2005/019503 patent/WO2006054424A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6252864A (ja) * | 1985-08-30 | 1987-03-07 | Hitachi Ltd | 燃料電池 |
JPH02312162A (ja) * | 1989-05-26 | 1990-12-27 | Fuji Electric Co Ltd | 燃料電池のガス漏れ防止装置 |
JP2003297403A (ja) * | 2002-03-29 | 2003-10-17 | Honda Motor Co Ltd | 水素検出装置 |
JP2004020332A (ja) * | 2002-06-14 | 2004-01-22 | Honda Motor Co Ltd | ガスセンサの較正方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020181751A1 (zh) * | 2019-03-14 | 2020-09-17 | 中山大洋电机股份有限公司 | 燃料电池尾排氢气浓度检测装置及燃料电池和新能源汽车 |
Also Published As
Publication number | Publication date |
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JP2006147151A (ja) | 2006-06-08 |
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