WO2005083826A1 - 燃料電池システム - Google Patents
燃料電池システム Download PDFInfo
- Publication number
- WO2005083826A1 WO2005083826A1 PCT/JP2005/003834 JP2005003834W WO2005083826A1 WO 2005083826 A1 WO2005083826 A1 WO 2005083826A1 JP 2005003834 W JP2005003834 W JP 2005003834W WO 2005083826 A1 WO2005083826 A1 WO 2005083826A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel cell
- gas
- exchange resin
- cell system
- liquid separator
- 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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
-
- 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
- H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
-
- 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
- H01M8/0687—Reactant purification by the use of membranes or filters
-
- 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
-
- 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 fuel cell system having an exhaust gas passage through which exhaust gas from a fuel cell flows.
- a fuel electrode anode electrode
- an electrolyte membrane composed of an ion exchange membrane, a catalyst layer and a diffusion layer disposed on one surface of the electrolyte membrane, and the electrolyte
- An oxidizer electrode force electrode
- MEA membrane-electrode assembly
- a fuel cell system including such a fuel cell
- hydrogen as a fuel gas and water generated by a cell reaction performed in the fuel cell flow in the hydrogen circulation system.
- a circulation system is employed in which this unreacted hydrogen is returned to the fuel cell again and used effectively.
- the water generated by the battery reaction is discharged outside.
- a pump is usually installed in the passage as circulation power.
- the water flowing in the hydrogen circulation system contains a small amount of fuel cell. And components eluted from piping parts of the system.
- impurities may enter from the air sucked from outside air and pass through the electrolyte membrane and enter the hydrogen circulation system.
- metal ions when metal ions are present in components eluted from the fuel cell and piping components of the system, the function of the fuel cell itself may be deteriorated or its life may be shortened. Also, the water produced in the fuel cell may become acidic.
- a method for purifying water flowing through the hydrogen circulation system a method using an ion exchange resin is generally used.
- the mounting space is limited. Is necessary. It is also necessary to periodically replace the ion exchange resin. Therefore, it is necessary to reduce the size of the fuel cell system and lengthen the exchange cycle of the ion exchange resin.
- fuel gas A filter that removes impurities contained in the gas is installed downstream from the junction with the cathode recycle blower discharge pipe that circulates the power source electrode outlet gas, and the filter removes impurities such as iron and salts contained in the cathode gas.
- the filter removes impurities such as iron and salts contained in the cathode gas.
- Japanese Patent Application Laid-Open No. 2001-313507 discloses a polyolefin as a method for producing an ion-exchange filter for removing impurities contained in gas supplied to a fuel electrode and an oxidant electrode.
- a method has been proposed in which a substrate filter made of polyfluorene is subjected to a surface hydrophilic treatment, and then an ion exchange polymer solution is applied to the substrate filter and dried.
- Japanese Patent Application Laid-Open No. 2002-313304 discloses a fuel gas discharge pipe. And at least one of the oxidant gas discharge pipes through which the water generated by the fuel cell is discharged is provided on the polymer electrolyte fuel cell side, and the ions contained in the generated water accompanying the exhaust gas There has been proposed a polymer electrolyte fuel cell system provided with an ion removal unit for removing water.
- a cartridge type ion exchanger is provided in a cooling water circulation line of a fuel cell mounted on a moving body, and two filters are provided in the ion exchanger.
- a spring which is arranged to face each other, and urges the perforated plate toward the other filter beside the one filter (that is, presses the perforated plate in the axial direction of the cartridge type ion exchanger).
- a chilled water circulation device for a fuel cell provided with a fuel cell has been proposed. The spring is provided on a flow path of the cooling water.
- the ion exchange resin is compressed in the axial direction by the axial pressing means consisting of the spring and the perforated plate. Since it is pressed, the filling state of the ion exchange resin can be appropriately maintained.
- the filter provided in the fuel cell system described in Japanese Patent Application Laid-Open No. 8-298130 removes impurities such as iron oxide and salts contained in the cathode gas. It does not reliably remove impurities contained in the particulate water mixed in the cathode gas.
- the ion-exchangeable filter obtained by the manufacturing method described in Japanese Patent Application Laid-Open No. 2001-310357 is not applicable to use in an exhaust gas passage through which exhaust gas from a fuel cell flows. There is no description, and no consideration is given to the removal of impurities contained in the particulate water mixed in the exhaust gas.
- a fuel cell described in Japanese Patent Application Laid-Open No. 2002-31304 The ion removal unit installed in the system removes ions contained in the product water flowing through the pipe, and removes impurities contained in particulate water mixed in the exhaust gas discharged from the fuel cell. It does not eliminate
- a cartridge type ion exchanger is disposed in a fuel cell cooling water circulation line. No consideration is given to arranging it in the exhaust gas passage for passing exhaust gas from the country. In particular, no consideration has been given to arranging a cartridge-type ion exchanger in the hydrogen circulation system, so there is no hindrance to efficiently separating liquid and gas in the gas-liquid separator. No effort has been made to install a cartridge type ion exchanger at this location.
- An object of the present invention is to improve such a conventional fuel cell system, and it is possible to reliably remove water flying in a particulate form in an exhaust gas passage and impurities mixed in the water.
- An object of the present invention is to provide a fuel cell system that can be removed and that can improve the performance and life of the fuel cell.
- the present invention relates to a fuel cell system having an exhaust gas passage through which exhaust gas from a fuel cell flows, wherein the exhaust gas passage contains a particulate water mixed with the exhaust gas.
- An object of the present invention is to provide a fuel cell system provided with an impurity removing member for removing contained impurities.
- the fuel cell system equipped with this configuration uses It is possible to purify particulate water mixed in the exhaust gas flowing through the gas passage, and it is possible to reliably remove impurities contained in the water.
- the impurity removing member may be disposed in an exhaust gas passage of a hydrogen circulation system of a fuel cell system.
- the fuel cell system according to the present invention may have a configuration in which a gas-liquid separator is provided in the exhaust gas passage, and the impurity removing member is disposed on an inner wall surface of the gas-liquid separator. .
- the water trapped (adsorbed or the like) by the impurity removing member can easily drop along the inner wall surface of the gas-liquid separator, so that the water can be more efficiently removed. Can be removed.
- the fuel cell system according to the present invention further includes a gas-liquid separator in the exhaust gas passage, wherein the impurity removing member is provided between an inner wall surface in the gas-liquid separator and an outer surface of the impurity removing member.
- a configuration may be provided in which a gap is formed in the space.
- the impurity removing member may be configured so that the flow resistance (resistance when the gas passes) increases as it approaches the gas outlet of the gas-liquid separator.
- the impurity removing member when the impurity removing member is provided in the gas-liquid separator, the space originally existing in the gas-liquid separator can be used as the installation space. Therefore, the provision of the impurity removing member does not increase the size of the fuel cell system. In addition, the number of parts for disposing the impurity removing member is also required at a minimum, and an increase in cost can be suppressed.
- the fuel cell system according to the present invention may have a configuration in which a gas-liquid separator is provided in the exhaust gas passage, and the impurity removing member is disposed downstream of the gas-liquid separator. Even with such a configuration, moisture that cannot be completely removed by the gas-liquid separator and impurities mixed in the moisture can be efficiently and reliably removed.
- the impurity removing member may be subjected to a water-repellent treatment. By doing so, it is possible to more efficiently remove the particulate water mixed with the exhaust gas flowing through the exhaust gas passage.
- a water-repellent member may be provided on the outer surface of the impurity removing member. By doing so, the amount of water flowing into the impurity removing member can be reduced more efficiently. .
- the impurity removing member may be housed in a housing made of a water-repellent member.
- the fuel cell system according to the present invention can be provided with a follow-up member that can be deformed to follow a change in volume of the impurity removing member.
- a follow-up member that can be deformed to follow a change in volume of the impurity removing member.
- the following member freezes and expands water such as generated water existing around or inside the impurity removing member, thereby causing a change in volume when the impurity removing member expands.
- water such as generated water existing around or inside the impurity removing member
- the filling rate of the impurity removing material which is a component of the impurity removing member, can be improved, and the space provided in the impurity removing member can be reduced. For example, even if a vehicle vibration or the like is received, adverse effects on the impurity removing material are prevented.
- a plurality of the following members may be dispersed and disposed inside the impurity removing member. By doing so, the volume change of the entire impurity removing member can be absorbed almost uniformly and evenly.
- the following member may be provided on an outer periphery of the impurity removing member. Even if the follower member is arranged in this manner, the volume change of the entire impurity removing member can be absorbed almost uniformly and evenly.
- a plurality of follow-up members may be further dispersed and disposed inside the impurity removing member.
- the material and shape of the following member are not particularly limited as long as they do not impair the performance of the fuel cell system and can be deformed following the volume change of the impurity removing member.
- it can be composed of a porous material.
- the following member is made of a porous material as described above, the gas-liquid In the separator, the gas flow can be prevented from being obstructed.
- the liquid can be temporarily held (contained) in the porous material, and the held liquid can be dropped and drained efficiently. Therefore, the gas-liquid separation function can be further improved. Furthermore, it is also possible to prevent a problem from occurring due to collision with the impurity removing member.
- the impurity removing member is provided in a gas-liquid separator, and the following member includes an elastic member. It is also possible to adopt a configuration that is disposed at a position outside the gas-liquid flow path. According to this configuration, since the follow-up member is disposed at a position outside the gas-liquid flow path of the gas-liquid separator, it is possible to prevent the flow of the gas and the drop of the liquid from being hindered.
- This elastic member can exert a following effect by the elastic force.
- the elastic member is not particularly limited as long as it does not support the fuel cell system and has an elastic function, and examples thereof include a spring member.
- the impurity removing member can be formed of an ion exchange resin member provided with an ion exchange resin. Further, the impurity removing member may be a foreign matter removing filter for removing foreign matter.
- the impurity removing member is an ion exchange resin member
- the ion exchange resin member is employed in a fuel cell system having a gas circulation system for recirculating exhaust gas and supplying the gas to the fuel cell.
- the present invention provides the following fuel cell system.
- a fuel cell system provided with a gas circulation system that recirculates exhaust gas and supplies the fuel cell to the fuel cell, wherein the gas circulation system has a particulate state mixed with the exhaust gas flowing through the gas circulation system. Absorbs impurities contained in water
- An object of the present invention is to provide a fuel cell system in which an ion exchange resin member to be attached is provided, and a fluid that has passed through the ion exchange resin member is supplied to the fuel cell again.
- the gas circulation system may be a hydrogen circulation system or an oxygen circulation system.
- the ion exchange resin member may be installed in both the hydrogen circulation system and the oxygen circulation system.
- the ion exchange resin member can purify the particulate water present in the exhaust gas flowing through the gas circulation system, and reliably remove the impurity components contained in the water. Can be removed.
- the fuel cell system according to the present invention may be configured such that the gas circulation system includes a gas-liquid separator, and the ion exchange resin member is disposed on an inner wall surface of the gas-liquid separator.
- the gas circulation system includes a gas-liquid separator, and the ion-exchange resin member has an inner wall surface inside the gas-liquid separator, and an outer surface of the ion exchange resin member. It is also possible to adopt a configuration in which a gap is formed between them. With such a configuration, the area where the fluid flowing from the gas-liquid inlet comes into contact with the ion exchange resin member, that is, the inflow area when the fluid flows into the ion exchange resin member can be increased. . Therefore, in addition to the above advantages, the pressure loss can be further reduced, and the purification (purification) efficiency can be further improved.
- the ion-exchange resin member is configured such that the closer the gas-liquid separator member is to the vicinity of the gas outlet, the greater the resistance (flow resistance) when gas passes. You can also. With this configuration, in addition to the above advantages, it is possible to further prevent the gas flow from being biased near the gas outlet of the gas-liquid separator.
- the ion-exchange resin member is provided in the gas-liquid separator, the space originally existing in the gas-liquid separator can be used as the installation space. This does not increase the size of the fuel cell system. In addition, the number of parts for disposing the ion exchange resin member is minimized, so that an increase in cost can be suppressed.
- the fuel cell system according to the present invention may be configured such that the gas circulation system includes a gas-liquid separator, and the ion exchange resin member is disposed downstream of the gas-liquid separator. Even with such a configuration, moisture that cannot be completely removed by the gas-liquid separator and impurity components mixed in the moisture can be efficiently and reliably removed.
- the ion-exchange resin member can be subjected to a water-repellent treatment. By doing so, it is possible to more efficiently remove the particulate water present in the exhaust gas flowing through the gas circulation system.
- a water repellent member may be provided on the outer surface of the ion exchange resin member. By doing so, the amount of water flowing into the ion exchange resin member can be reduced more efficiently.
- the ion-exchange resin member may be housed in a housing made of a water-repellent member.
- FIG. 1 is a schematic configuration diagram of a fuel cell system according to the present embodiment.
- FIG. 2 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion exchange resin member of the fuel cell system shown in FIG.
- FIG. 3 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 4 is a schematic configuration cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 5 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion-exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 6 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 7 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 8 is a schematic sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 9 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion-exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 10 is a schematic sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 11 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 12 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 11 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 12 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange
- FIG. 13 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 14 is an enlarged schematic cross-sectional view showing the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 15 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 16 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 17 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 18 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 17 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 18 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an i
- FIG. 19 is a schematic configuration sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 20 is a schematic cross-sectional view showing, in an enlarged manner, the vicinity of a gas-liquid separator and an ion exchange resin member of a fuel cell system according to another embodiment of the present invention.
- FIG. 1 is a schematic configuration diagram of a fuel cell system according to the present embodiment
- FIG. 2 is a schematic configuration cross-sectional view showing an enlarged vicinity of a gas-liquid separator and an ion exchange resin member of the fuel cell system shown in FIG. .
- a circulation passage provided in a hydrogen circulation system will be described as an example of an exhaust gas passage connected to a fuel cell and through which exhaust gas from the fuel cell flows.
- the fuel cell 100 of the fuel cell system 1 includes a MEA, a fuel gas (hydrogen) for the fuel electrode (anode), and an oxidant electrode (power source). It has a configuration that incorporates a separator that forms a flow path for supplying an oxidizing gas (oxygen, usually air) to the fuel cell, and a stack that includes a plurality of cells in which are stacked.
- a fuel gas hydrogen
- an oxidant electrode power source
- the air supply port 101 of the fuel cell 100 is connected to an air supply passage 102 for supplying air as an oxidizing gas, and the air discharge port 103 is connected to the fuel cell 100 from the fuel cell 100.
- An air discharge passage 104 from which discharged air and water are discharged is connected.
- one end of a hydrogen circulation system 10 is connected to the hydrogen supply port 105 of the fuel cell 100, and the other end of the hydrogen circulation system 10 is connected to the hydrogen discharge port 106. .
- the hydrogen circulation system 100 circulates the unreacted hydrogen out of the unreacted hydrogen and the generated water discharged from the fuel cell 100, and supplies it again to the fuel cell 100 with new hydrogen.
- the generated water is discharged to the outside.
- This hydrogen circulation system 10 is connected to a circulation passage 11 having one end connected to a hydrogen discharge port 106, and hydrogen and water which are connected to the other end of the circulation passage 11 and introduced from the circulation passage 11.
- Separate The gas-liquid separator 12 and the circulation passage 13 connected to the gas-liquid separator 12 and into which the gas discharged from the gas-liquid separator 12 is introduced, and connected to the downstream side of the circulation passage 13 And a circulation pump 15 serving as circulating power for the hydrogen circulation system 10.
- One end is connected to a hydrogen supply port 105 to supply hydrogen to the fuel cell 100, and the other end is a circulation passage 13.
- Supply passage connected at the junction A with the downstream end of the Road 16 Reference numeral 24 denotes a valve for adjusting the pressure of hydrogen when hydrogen is supplied to the fuel cell 100.
- the gas-liquid separator 12 has a hollow, substantially cylindrical shape, and has a gas-liquid inlet 18 for introducing hydrogen and water discharged from the circulation passage 11, and a gas-liquid inlet 18. A gas outlet 19 for discharging the gas separated in the separator 12 is formed.
- the gas-liquid separator 12 separates a gas-liquid mixture (fluid) introduced from the gas-liquid inlet 18 into a gas and a liquid by swirling.
- a drain 17 is formed below the gas-liquid separator 12 for receiving the water separated by the gas-liquid separator 12 and discharging the water to the outside.
- the drain port 17 is provided with a drain valve (not shown) having a structure for discharging only water separated by the gas-liquid separator 12 to the outside and not discharging hydrogen to the outside.
- An ion exchange resin member 20 is provided in the gas-liquid separator 12.
- the ion exchange resin member 20 has a cation exchange resin and an anion exchange resin, and is disposed in contact with the inner wall of the gas-liquid separator 12 so as to substantially fill the inside of the gas-liquid separator 12. . For this reason, the gas introduced from the gas-liquid inlet 18 and separated into gas and liquid passes through the ion-exchange resin member 20 and is exhausted from the gas outlet 19 to the circulation passage 13.
- the ion-exchange resin which is a component of the ion-exchange resin member 20, is usually in the form of particles, but may be in the form of fibers.
- the ion exchange resin is mounted in a resin case having an opening (not shown) so as not to be blown off by a cyclone (flow rate) generated in the gas-liquid separator 12.
- the generated water and unreacted hydrogen discharged to the circulation passage 11 move to the gas-liquid separator 12 by the power of the circulation pump 15, where they are separated into hydrogen and water. At this time, about 90% of the water discharged from the circulation passage 11 is separated from the hydrogen, stored in the drain 17 and discharged to the outside. However, it is difficult to remove the water flying in a particle state along with the flow of hydrogen and the impurity components contained in the water, and the water and the impurity components in the particle state are ion-exchanged. The resin member 20 is reached.
- the particulate water and impurity components that have reached the ion-exchange resin member 20 are trapped here. Then, the particulate water trapped in the ion exchange resin member 20 travels along the inner wall of the gas-liquid separator 12 and is stored in the drain 17. In addition, a part of the impurity component contained in the water is contained in the drain 17 together with the water, and the rest is absorbed into the ion exchange resin member 20. On the other hand, the hydrogen passes through the ion exchange resin member 20 and moves to the downstream side of the circulation passage 13. 5 003834
- a small amount of a material or its component elutes from a part in the fuel cell that comes into contact with generated water due to a cell reaction in the fuel cell, or a piping part such as a circulation passage.
- impurity components may enter from the air sucked from the outside air, pass through the electrolyte membrane, and enter the hydrogen circulation system 10. These contaminants then flow back into the fuel cell.
- the electrolyte membrane polymer material
- the electrolyte membrane is an ion exchange membrane, so that the ion substance may be adsorbed or an unexpected reaction may be caused.
- the life of the electrolyte membrane may be shortened.
- the dissociation of the hydrogen molecules into atoms may adversely affect the platinum catalyst mounted on the surface of the electrolyte membrane.
- the water produced in the fuel cell may become acidic.
- the ion-exchange resin member 20 reliably traps and removes water and impurity components flying in a particulate state in the hydrogen circulation system. can do. For this reason, it is possible to prevent generated water and impurity components from flowing back into the fuel cell 100, and to improve the performance and life of the fuel cell 100.
- the ion exchange resin member 20 is disposed in the gas-liquid separator 12, that is, the space originally existing in the gas-liquid separator 12 is a space in which the ion exchange resin member 20 is disposed. By disposing the ion exchange resin member 20, the fuel cell system 1 itself does not increase in size. Also, the parts for arranging the ion exchange resin member 20 are also minimal, An increase in cost can be suppressed.
- the ion exchange resin member 20 is disposed in contact with the inner wall of the gas-liquid separator 12 so as to substantially fill the inside of the gas-liquid separator 12 has been described.
- the ion exchange resin member 20 but also the disposition position and the size of the ion exchange resin member 20 are determined by the amount of the impurity component contained in the particulate water contained in the exhaust gas flowing through the gas circulation system.
- the gas can be adsorbed and the gas that has passed through the ion exchange resin member 20 is supplied again to the fuel cell 100.
- a gap 30 that opens from the lower part to the upper part of the gas-liquid separator 12 and communicates with the circulation passage 13 is formed substantially at the center of the ion exchange resin member 20. May be.
- the ion exchange resin member 20 is connected to the inner wall of the gas-liquid separator 12 on the side where the gas-liquid inlet 18 is formed. Alternatively, it may be arranged so as to cover the gas-liquid inlet 18.
- the ion exchange resin member 20 is disposed on the gas outlet 19 side in the gas-liquid separator 12 so as to be in contact with the inner wall of the gas-liquid separator 12. May be.
- a water-repellent membrane 25 may be provided on the lower surface of the ion exchange resin member 20, that is, on the outer surface on the drain port 17 side.
- an ion exchange resin member 20 is formed by connecting an inner wall of a gas-liquid separator 12 and an outer periphery of the ion exchange resin member 20.
- the gas-liquid separator 12 may be disposed from the vicinity of the bottom surface to the top surface thereof so that a gap 30 is formed therebetween.
- a water-repellent film 25 may be provided on the outer surface of the ion exchange resin member 20.
- the gap 30 due to the existence of the gap 30, the area where the fluid flowing from the gas-liquid inlet 18 contacts the ion exchange resin member 20 corresponds to the area of the outer surface of the ion exchange resin member 20. Therefore, the inflow area when the fluid flows into the ion exchange resin member 20 increases. Therefore, the pressure loss can be further reduced, and the purification (purification) efficiency can be further improved.
- an ion-exchange resin member 20 is provided on a gas outlet 19 side in a gas-liquid separator 12, and a gas-liquid separator 1 is provided. 2, and a gap 30 is formed between the inner wall of the gas-liquid separator 12 and the outer periphery of the ion-exchange resin member 20 continuously thereunder.
- the gas-liquid separator 12 may be provided up to the vicinity of the bottom surface.
- a water repellent film 25 may be provided on the outer surface of the ion exchange resin member 20.
- the ion-exchange resin member 20 is disposed such that its cross-sectional shape is substantially trapezoidal, with the upper side of the gas-liquid separator 12 being longer and the lower side being shorter.
- a gap 30 may be formed between the inner wall 12 and the outer periphery of the ion exchange resin member 20.
- the ion exchange resin member 20 is disposed on the gas outlet 19 side of the gas-liquid separator 12 so as to be in contact with the inner wall of the gas-liquid separator 12.
- the ion-exchange resin member 20 is disposed further below the ion-exchange resin member 20 so that its cross-sectional shape is substantially trapezoidal in shape, with the cross-sectional shape being longer on the upper side of the gas-liquid separator 12 and shorter on the lower side.
- a gap 30 may be formed between the inner wall of 12 and the outer periphery of the ion exchange resin member 20.
- the flow resistance can be increased as the gas outlet 19 of the gas-liquid separator 12 gets closer to the gas outlet 19, and the gas flow is more unevenly distributed near the gas outlet 19. Can be prevented.
- the water-repellent film 25 can be provided on the outer surface of the ion exchange resin member 20.
- an ion exchange resin member accommodating chamber 40 is provided on the downstream side of the gas-liquid separator 12 and the gas-liquid separator 12.
- the ion exchange resin member 20 may be accommodated in the ion exchange resin member accommodation chamber 40.
- the gas-liquid separator 12 and the ion-exchange resin member storage chamber 40 may be located close to each other, or may be disposed apart from each other to some extent.
- the water-repellent film 25 can be provided on the outer surface of the ion exchange resin member 20.
- a gap 3 OA is formed between the inner wall of the gas-liquid separator 12 and the outer periphery of the upper part of the ion exchange resin member 20.
- a gap 30 ⁇ / b> B that opens from the lower part to the upper part of the gas-liquid separator 12 and communicates with the circulation passage 13 may be formed substantially at the center.
- a water-repellent membrane 25 may be provided on the surface of the gas exchange resin member 20 facing the inner wall of the gas-liquid separator 12.
- a gap 3 OA is formed between the inner wall of the gas-liquid separator 12 and the outer periphery of the upper part of the ion exchange resin member 20.
- a gap 30 ⁇ / b> B that opens toward the upper part except for the lower part and that communicates with the circulation passage 13 may be formed at a substantially central part of the first part.
- a water-repellent membrane 25 may be provided on the surface of the ion-exchange resin member 20 facing the inner wall of the gas-liquid separator 12.
- a gap 3 OA is formed between the inner wall of the gas-liquid separator 12 and the outer periphery of the ion exchange resin member 20.
- a gap 30B opened from the lower part of the gas-liquid separator 12 to the upper part and communicated with the circulation passage 13 may be formed substantially at the center. With this configuration, the pressure loss can be further reduced.
- a water-repellent film 25 may be provided on the surface of the ion exchange resin member 20 facing the inner wall of the gas-liquid separator 12.
- a gap 3 OA is formed between the inner wall of the gas-liquid separator 12 and the outer periphery of the ion exchange resin member 20.
- a gap 30 ⁇ / b> B may be formed in the central portion, which is open toward the upper portion except for the lower portion, and communicates with the circulation passage 13. With this configuration, the pressure loss can be further reduced.
- a water-repellent membrane 25 may be provided on the surface of the ion exchange resin member 20 facing the inner wall of the gas-liquid separator 12.
- a gap 30 ⁇ / b> B may be formed in the portion, which is open toward the upper portion except for the lower portion, and communicates with the circulation passage 13.
- the ion exchange resin is placed in a predetermined position by putting the ion exchange resin in a resin case (not shown) as the ion exchange resin member 20
- a resin case (not shown) as the ion exchange resin member 20
- the water-repellent membrane 25 is provided on the outer surface of the ion-exchange resin member 20
- the present invention is not limited to this.
- the ion-exchange resin is contained in a container such as a bag made of the water-repellent membrane 25.
- an ion exchange resin member 20 housed in the case may be housed.
- the ion exchange resin member 20 and the water-repellent membrane 25 are disposed in the hydrogen circulation system 10 .
- the water- and water-repellent film 25 may be provided in an oxygen circulation system.
- the ion exchange resin member 20 and the water repellent membrane 25 may be provided in both the hydrogen circulation system 10 and the oxygen circulation system.
- a plurality of sponge materials 50 which are porous materials as follow-up members are dispersed in an ion exchange resin member 20. It can also be done.
- the sponge material 50 can be sponge.
- the zigzag 50 follows this volume change and can absorb it. Therefore, a gap is prevented between the water-repellent membrane 25 and the ion-exchange resin member 20 and the water-repellent membrane 25 is prevented from being pressed by the ion-exchange resin member 20. can do.
- the sponge material 50 can absorb the volume change of the entire ion exchange resin member 20 almost uniformly and evenly. Can be. Further, the sponge material 50 is soft and does not cause any trouble due to collision with the ion exchange resin member. Further, since the sponge material 50 can allow gas to pass therethrough, it does not hinder the flow of gas in the gas-liquid separator 12. Further, the sponge material 50 can temporarily retain (contain) moisture, and the retained moisture can be dropped into the drain 17 to be efficiently drained. Therefore, the gas-liquid separation function can be further improved.
- the sponge material 50 can be provided also in the ion exchange resin member 20 in which the water repellent film 25 is not provided.
- a gap may be formed between the ion-exchange resin member 20 and the resin case (not shown) in which the ion-exchange resin member 20 is placed, or the resin case may be used as the ion-exchange resin member. The compression can be prevented by 20. Further, as shown in FIGS.
- a sponge member 50 as a follow-up member may be provided on the outer peripheral surface of the ion exchange resin member 20.
- the sponge material 50 is subjected to this volume change. This can be absorbed by following. Therefore, it is possible to prevent a gap from being formed between the water-repellent film 25 and the ion-exchange resin member 20 and to prevent the water-repellent film 25 from being pressed by the ion-exchange resin member 20.
- the sponge material 50 can of course be provided on the outer peripheral surface of the ion exchange resin member 20 where the water-repellent film 25 is not provided, and the same effect as described above can be obtained. can get.
- the sponge material 50 may be provided on the entire outer peripheral surface of the ion exchange resin member 20 or may be provided on a desired part.
- a sponge material 50 as a follow-up member is provided on the outer peripheral surface of the ion-exchange resin member 20, and A plurality of sponge materials 50 may be dispersed and provided in 20.
- the inner wall of the gas-liquid separator 12 which is separated from the gas-liquid flow path that is, in FIG.
- the spring 61 and one end of the spring 61 are fixed to the inner wall opposed to the gasket-inlet 18 of the ion-exchange resin member 20, and the plate-shaped member 6 can be brought into contact with the outer peripheral surface opposed to the gas-liquid inlet 18 of the ion-exchange resin member 20.
- a spring member 60 may be provided as a follow-up member composed of 2 and.
- the spring member 60 can follow the volume change and absorb it. Since the spring member 60 is disposed at a position outside the gas-liquid flow path of the gas-liquid separator 12, it prevents gas flow and liquid from dropping to the drain port 17. Can be prevented.
- the spring member 60 is an ion-exchanged member in which the water-repellent membrane 25 is not provided.
- FIG. 19 a plurality of sponge members 50 as follow-up members in the ion exchange resin member 20 in the vertical direction shown in FIG. (In Fig. 19, two).
- the follow-up member is not limited to a porous material (for example, sponge material 50), and does not impair the performance of the fuel cell system 1 and follows the volume change of the ion exchange resin member 20. As long as it can be deformed, various materials such as a spring member, a bellows member, rubber, and a soft resin can be used. In addition, at least one following member may be provided.
- a space 70 may be provided. That is, when the ion exchange resin member 20 expands, the space 70 has a size capable of permitting (absorbing) the expansion. It will be relatively deformed (following) according to the volume change of.
- the space 70 is desirably opened on the lower side in order to prevent moisture such as generated water from entering the gas outlet 19.
- the following member described above absorbs a volume change such as expansion and contraction of the ion exchange resin member 20 due to the operating state of the fuel cell 100 and the like.
- water such as generated water existing around and inside the ion exchange resin member 20 freezes and expands, thereby changing the volume when the ion exchange resin member 20 expands (volume increase). ) Can be deformed following.
- an ion exchange resin member is used as the impurity removing member.
- the case where 20 is used has been described.
- the present invention is not limited to this.
- As the impurity removing member another member may be used as long as the impurity can be removed.
- a foreign matter removing filter or the like for removal may be used.
- the circulation passage provided in the hydrogen circulation system has been described as an example of the exhaust gas passage through which the exhaust gas from the fuel cell 100 flows, but the present invention is not limited to this.
- the gas passage may be an air discharge passage 104.
- the passage is not particularly limited as long as it is a passage through which the exhaust gas from the fuel cell 100 flows.
- the fuel cell system according to the present invention can reliably remove water flying in the form of particles in the exhaust gas passage and impurities mixed in the water by the impurity removing member. As a result, it is possible to prevent the fuel cell from being adversely affected by moisture and impurities existing in the exhaust gas passage, and to improve the performance and life of the fuel cell.
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/588,604 US7718294B2 (en) | 2004-03-02 | 2005-03-01 | Fuel cell system |
DE112005000500T DE112005000500T5 (de) | 2004-03-02 | 2005-03-01 | Brennstoffzellensystem |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-058010 | 2004-03-02 | ||
JP2004058010 | 2004-03-02 | ||
JP2004218475A JP5077730B2 (ja) | 2004-03-02 | 2004-07-27 | 燃料電池システム |
JP2004-218475 | 2004-07-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005083826A1 true WO2005083826A1 (ja) | 2005-09-09 |
Family
ID=34914496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/003834 WO2005083826A1 (ja) | 2004-03-02 | 2005-03-01 | 燃料電池システム |
Country Status (4)
Country | Link |
---|---|
US (1) | US7718294B2 (ja) |
JP (1) | JP5077730B2 (ja) |
DE (1) | DE112005000500T5 (ja) |
WO (1) | WO2005083826A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006100239A (ja) * | 2004-09-06 | 2006-04-13 | Toyota Motor Corp | 燃料電池システム |
US8389169B2 (en) * | 2007-07-03 | 2013-03-05 | Samsung Sdi Co., Ltd. | Hydrogen generator and fuel cell system with the same |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008218339A (ja) * | 2007-03-07 | 2008-09-18 | Toyota Motor Corp | 燃料電池システムおよび希釈器 |
US8808931B2 (en) * | 2008-01-09 | 2014-08-19 | Dow Global Technologies Llc | Ion exchange filter for fuel cell system |
JP2009231073A (ja) * | 2008-03-24 | 2009-10-08 | Toyota Motor Corp | 燃料電池システム |
KR100969795B1 (ko) * | 2008-04-15 | 2010-07-13 | 삼성에스디아이 주식회사 | 연료전지용 연료공급장치 및 이를 이용하는 연료전지시스템 |
EP2412051B1 (en) * | 2009-03-24 | 2014-10-22 | Dow Global Technologies LLC | Ion exchange filter for fuel cell system |
JP5045726B2 (ja) * | 2009-10-19 | 2012-10-10 | トヨタ自動車株式会社 | 燃料電池システム |
GB2515463B (en) * | 2013-04-24 | 2021-04-21 | Intelligent Energy Ltd | A fuel cell system |
DE102014202217A1 (de) * | 2014-02-06 | 2015-08-06 | Volkswagen Ag | Brennstoffzellensystem |
US10562408B2 (en) * | 2017-09-20 | 2020-02-18 | Ford Motor Company | Anode exhaust reservoir assembly |
JP7256464B2 (ja) * | 2019-10-29 | 2023-04-12 | トヨタ紡織株式会社 | 冷却装置 |
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US8389169B2 (en) * | 2007-07-03 | 2013-03-05 | Samsung Sdi Co., Ltd. | Hydrogen generator and fuel cell system with the same |
Also Published As
Publication number | Publication date |
---|---|
JP5077730B2 (ja) | 2012-11-21 |
US20070259241A1 (en) | 2007-11-08 |
JP2005285735A (ja) | 2005-10-13 |
US7718294B2 (en) | 2010-05-18 |
DE112005000500T5 (de) | 2007-04-26 |
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