WO2001035477A1 - Pile a combustible electrolytique polymerique - Google Patents
Pile a combustible electrolytique polymerique Download PDFInfo
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- WO2001035477A1 WO2001035477A1 PCT/JP2000/007866 JP0007866W WO0135477A1 WO 2001035477 A1 WO2001035477 A1 WO 2001035477A1 JP 0007866 W JP0007866 W JP 0007866W WO 0135477 A1 WO0135477 A1 WO 0135477A1
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- gas
- flow path
- cooling water
- polymer electrolyte
- anode
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- 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
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
-
- 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
- H01M8/02—Details
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
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- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
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- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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- 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
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- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
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- 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
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- 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
- H01M8/1007—Fuel cells with solid electrolytes with both reactants being gaseous or vaporised
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- 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 room temperature operation type polymer electrolyte fuel cell used for a portable power supply, a power supply for an electric vehicle, a home cogeneration system, and the like, and more particularly to an improvement of a conductive separator plate thereof.
- Fuel cells using polymer electrolytes generate electricity and heat simultaneously by electrochemically reacting a fuel gas containing hydrogen with an oxidizing gas containing oxygen, such as air.
- This fuel cell basically includes a pair of electrodes formed on both sides of a hydrogen ion conductive polymer electrolyte membrane, that is, an anode and a force source.
- the electrode includes a catalyst layer mainly composed of carbon powder supporting a metal catalyst such as a platinum group metal, and a diffusion layer formed on the outer surface of the catalyst layer and having both gas permeability and electronic conductivity.
- a gasket is placed around the electrodes with a polymer electrolyte membrane between them so that the fuel gas and oxidizer gas supplied to the electrode do not leak out or the two gases mix with each other. .
- This gasket is usually assembled in advance with the electrode and the polymer electrolyte membrane. This is called MEA (electrolyte membrane-electrode assembly).
- MEA electrolyte membrane-electrode assembly
- a conductive separation plate is placed to mechanically secure the MEA and electrically connect adjacent MEAs to each other in series.
- a gas flow path is formed to supply the reaction gas to the electrode surface and carry away generated and surplus gas.
- the gas flow path is Although it can be provided separately, it is common to provide a groove on the surface of the separation plate to use it as a gas flow path.
- conductive separator plates require high electron conductivity, gas-tightness, and high corrosion resistance, grooves have been conventionally formed on a dense carbon plate by machining such as cutting. It was common to use it as an overnight board.
- a gas flow path provided in a conventional conductive separator plate is generally a straight flow path in which a plurality of gas flow paths are provided in parallel from the gas inlet to the gas outlet.
- Met polymer electrolyte fuel cells generate water on the air electrode side during operation, and the cell performance cannot be fully exhibited unless this is efficiently removed. Therefore, by reducing the cross-sectional area of the gas flow path provided in the conductive separator plate and forming a serpentine-in flow path with the gas flow path meandering, the length per gas flow path is increased. However, attempts have been made to forcibly remove generated water by substantially increasing the gas flow rate.
- a stacked structure in which many of the above-described cells are stacked is adopted.
- heat is generated along with the generation of power.
- a cooling plate is provided for each cell or cells to keep the battery temperature constant while simultaneously generating the generated thermal energy in the form of hot water. Make it available.
- a cooling plate a structure in which a heat medium such as cooling water is circulated inside a thin metal plate is generally used.However, a flow path for cooling water is formed on the back of a separator plate that constitutes a unit cell.
- a cooling gasket for sealing a heat medium such as cooling water is also required. In this seal, it is necessary to ensure sufficient conductivity between the cooling plates by completely crushing the O-ring interposed between the cooling plates.
- a plurality of cells including a cooling unit are stacked in one direction, a pair of end plates are arranged at both ends, and a space between the two end plates is provided. Need to be fixed with fastening rods. It is desirable that the tightening method be such that the cells can be tightened as uniformly as possible within the plane. From the viewpoint of mechanical strength, metal materials such as stainless steel are usually used for end plates and fastening rods. These end plates and fastening rods and the stacked battery shall be electrically insulated by insulating plates, and shall have a structure in which current does not leak out through the end plates. As for the fastening rod, a method has been proposed in which the through-hole inside the separator plate is inserted or the entire stacked battery is tightened with a metal belt over the end plate.
- the electrolyte membrane functions as an electrolyte in a state containing moisture, it is necessary to humidify and supply the supplied fuel gas and oxidizing gas.
- a polymer electrolyte membrane at least in a temperature range of up to 100 ° C., as the water content increases, the ionic conductivity increases, so that the internal resistance of the battery decreases and the output increases. Therefore, in order to increase the water content in the electrolyte membrane, it is necessary to supply the supply gas with high humidification.However, if a high humidification gas that is higher than the battery operating temperature is supplied, dew water will be generated inside the battery.
- the water droplets impede the smooth gas supply, and water is generated by power generation at the air electrode side that supplies the oxidizing gas, so that the efficiency of removing generated water is reduced and the battery performance is reduced. Therefore, the gas is usually supplied by humidifying the dew point below the battery operating temperature.
- a bubbler-humidification method in which the supply gas is bubbled in deionized water kept at a predetermined temperature to humidify the gas, or one of the electrolyte membranes
- a membrane humidification method is used in which deionized water kept at a predetermined temperature is flowed on one surface and a supply gas is flown on the other surface to humidify the surface.
- the humidified fuel gas and oxidant gas are supplied to a polymer electrolyte fuel cell and used for power generation. At this time, a current density distribution occurs in the plane of any single cell in the battery stack.
- the fuel gas is supplied after being humidified by a predetermined amount at the gas supply inlet, but the hydrogen in the fuel gas is consumed by power generation. Becomes lower. For this reason, the partial pressure of hydrogen is lower and the partial pressure of water vapor is higher in the downstream part of the gas.
- the oxidizing gas is also supplied after being humidified by a predetermined amount at the gas supply inlet, but oxygen in the oxidizing gas is consumed by power generation, and water generated by the power generation is generated. For this reason, the oxygen partial pressure is higher and the steam partial pressure is lower in the gas upstream, and the oxygen partial pressure is lower and the steam partial pressure is higher in the gas downstream. Furthermore, the temperature of the cooling water for cooling the battery is lower at the entrance and higher at the exit, so that a temperature distribution occurs in the cell surface. For the above reasons, a current density distribution occurs in the plane of the cell.
- the partial pressures of hydrogen and water vapor in the fuel gas are non-uniform in the plane of the unit cell, and the partial pressures of oxygen and water vapor in the oxidizing gas are non-uniform. If the distribution becomes extremely large, the battery will be extremely dry, over-dried, extremely wet, over-flooded, and the battery characteristics will be significantly degraded.
- the problem described above is that the partial pressure of water vapor in the gas is higher on the gas outlet side than on the gas inlet side, both on the fuel electrode side supplying the fuel gas and on the air electrode side supplying the oxidizing gas. Is often caused by Therefore, as shown in Japanese Patent Application Laid-Open Publication No. Hei 9-11511356, the flow direction of the oxidizing gas and the flow direction of the cooling water are set to be the same direction, and the oxidizing gas Attempts have also been made to suppress the overflooding of the downstream portion of the air electrode and reduce the in-plane current density distribution of the cell by raising the temperature of the downstream portion of the cell compared to the upstream portion.
- polymer electrolyte fuel cells When used as a power source for electric vehicles, polymer electrolyte fuel cells are strongly required to have compactness, light weight, and low cost. When used as a home cogeneration system, compactness, high efficiency and low cost are required. In any case, the fuel cell can be used as a reformer, supply gas humidifier, exhaust heat recovery / converter / integrator, etc. From the viewpoint of making the entire system compact, it is required to limit the compact size of the polymer electrolyte fuel cell and the shape of the installation space of the battery. In particular, when installing a power supply in the lower part of the vehicle as a power supply for electric vehicles, the demand for thinner batteries is severe.
- the size of the auxiliary power related to air supply etc. Significantly affects overall efficiency. Therefore, in order to reduce the power of the air blower and the like supplied to the air electrode side in particular, it is necessary to reduce the pressure loss of the air supplied to the air electrode. In order to reduce the pressure loss on the air electrode side, it is necessary to increase the cross-sectional area of the gas flow path of the air electrode side separator plate, and from that point of view, the serpentine type flow path is not suitable for small-sized cogeneration systems. Not suitable.
- the present inventors have found that if the shape of the portion of the conductive separator plate in contact with the electrode is close to a square or a circle, it is sufficient that the gas flow path on the air electrode side is a straight flow path. Battery performance cannot be demonstrated. The reason for this is that the gas flow velocity cannot be made sufficiently large.Therefore, if the gas flow velocity is reduced as the straight flow path is reduced, the gas flow rate becomes shallower than 0.4 mm. Then, it was found that the diffusion layer of the gasket electrode was partially dropped into the gas flow path, which was not preferable because the gas flow was obstructed or uneven.
- the gas flow path on the air electrode side becomes a serpentine flow path.
- the gas supply pressure loss becomes too large.
- the pressure loss at the gas inlet becomes large, the relative humidity at the gas inlet becomes too large as compared with the relative humidity at the gas outlet, and sufficient battery performance cannot be exhibited.
- the diffusion of the supplied gas to the electrode surface is hindered, the gas use efficiency is deteriorated, and as a result, the reaction resistance of the electrode increases.
- the present inventors have conducted various studies on such a rectangular conductive separation plate, and as a result, the following has become clear.
- the straight part of the gas flow path is arranged parallel to the short side direction of the rectangular separator plate, dew water such as generated water cannot be discharged effectively, and sufficient battery performance cannot be obtained.
- the straight section of the sagittal pentane type flow path is compared with the case where the long side of the rectangular separator plate is arranged in parallel. Therefore, even when the number of turns of the flow path is increased and a flow path having the same cross-sectional area is formed, the pressure loss increases, and the efficiency of discharging water or generated water present in the gas deteriorates. Degrades performance. Disclosure of the invention
- the present invention provides a polymer electrolyte fuel cell provided with a rectangular conductive separator plate.
- a polymer electrolyte fuel cell includes a hydrogen ion conductive polymer electrolyte membrane, an anode and a cathode sandwiching the hydrogen ion conductive polymer electrolyte membrane, and a gas flow path for supplying a fuel gas to the anode.
- a cathode-side conductive separator plate having a gas flow path for supplying an oxidizing gas to the power source, the anode-side conductive plate and a power source side.
- the conductive separator plate has a substantially rectangular shape in which a portion that comes into contact with the anode and the cathode has a longer side that is at least twice as long as the shorter side. The straight part is formed along the long side direction of the rectangle.
- the force-side conductive separator plate is formed of a plurality of oxidizing agents that are substantially continuous in a straight line from the short side to the other short side along the long side direction. It is preferable to have a gas flow path.
- the cathode-side conductive separator plate has an inlet manifold connected to the gas flow path on one short side and an outlet manifold connected to the gas flow path on the other short side.
- the opening width of each of the inlet manifold and the outlet manifold is the same as that of the gas connected to the manifold. It is preferable that the width is substantially equal to or larger than the total width of the flow path.
- the flow path of the oxidizing gas has a plurality of straight gas flow paths parallel to each other along the long side direction of the cathode-side conductive separator plate and at least one turn portion serving as a folded portion. It preferably has a serpentine type structure, and the turn portion is preferably located near a short side of the force-sword-side conductive separation plate.
- the force-sword-side conductive separator plate has, on the back surface thereof, a straight line portion having a flow path of cooling water along a long side of the rectangle, and a flow direction and cooling of the oxidant gas in the straight line portion of the gas flow path. It is preferable that the flow direction of water in the linear portion of the flow path of the cooling water substantially coincides.
- the fuel gas flow path has a plurality of straight gas flow paths parallel to the long side direction of the anode-side conductive separator plate and at least one turn portion serving as a folded portion. It is preferable that the turn portion is located near the short side of the anode-side conductive separator plate. In this case, the turn portion of the oxidant gas flow path is 2, and the fuel gas flow The number of turns in the road is preferably 2 or 4.
- the length of the long side of the conductive side separation plate on the anode side and the power source side that contacts the cathode and cathode, respectively, should be no more than 6 times the length of the short side. preferable.
- the anode-side and cathode-side conductive separator plates each have a manifold for supplying and discharging an oxidizing gas, a fuel gas, and cooling water to and from the oxidizing gas, fuel gas, and cooling water flow paths, respectively. It is preferable to be arranged near the side.
- the width of the flow path of the fuel gas and the oxidizing gas on the anode-side and power source-side conductive separator plates is 1.5 mm or more and 2.5 mm or less, and the depth of the flow path is 0 mm or less. 4 mm or more and 1 mm or less, and The width is preferably 0.5 mm or more and 1.5 mm or less.
- Grooves forming the gas flow path or the cooling water flow path traverse the center on both sides of the separation plate, and a protrusion between the grooves formed on one surface of the separation plate. It is preferable that the position of the center line of the portion and the position of the center line of the convex portion between the grooves formed on the other surface substantially coincide with each other except for an unavoidable portion.
- FIG. 1 is a longitudinal sectional view of a main part of a fuel cell according to an embodiment of the present invention.
- FIG. 2 is a front view of a cathode-side conductive separation plate of the battery.
- FIG. 3 is a front view of an anode-side conductive separator plate of the battery.
- Fig. 4 is a rear view of the separation plate.
- FIG. 5 is a front view of a force plate-side conductive separation plate in another embodiment.
- FIG. 6 is a front view of the anode-side conductive separation plate.
- FIG. 7 is a front view of a cathode-side conductive separator plate according to still another embodiment.
- FIG. 8 is a front view of a cathode-side conductive separation plate according to still another embodiment.
- FIG. 9 is a front view of a cathode-side conductive separation plate according to still another embodiment.
- FIG. 10 is a front view of a force-sword-side conductive separation plate according to still another embodiment.
- FIG. 11 is a front view of the conductive separation plate of the comparative example.
- FIG. 12 is a front view of a force plate-side conductive separator plate of a comparative example.
- FIG. 13 is a front view of a cathode-side conductive separation plate of another comparative example
- FIG. 14 is a front view of a cathode-side conductive separation plate of still another comparative example.
- a polymer electrolyte fuel cell includes a hydrogen ion conductive polymer electrolyte membrane, an anode and a cathode sandwiching the hydrogen ion conductive polymer electrolyte membrane, and a fuel gas supplied to the anode.
- An anode-side conductive separator plate having a gas flow path; and a force-side-side conductive separator plate having a gas flow path for supplying an oxidizing gas to the force source, wherein the anode-side and cathode-side conductive plates are provided.
- the separation plate has a substantially rectangular shape whose long side is at least twice as long as the short side, and the portion that comes into contact with the anode and the force source, respectively,
- the road has a straight portion formed along the long side direction of the rectangle.
- the present invention uses a substantially rectangular conductive separation plate whose long side has a length that is at least twice as long as the short side at a portion that contacts the electrode. Therefore, a rectangular electrode is used. For this reason, by setting the long side of the rectangle as the installation surface, the height of the battery stack can be reduced, that is, the battery stack can be made thin.
- the long side of the rectangle is preferably 2 to 6 times the short side, and 3 ⁇ 6 times is more preferred.
- the short side of the rectangular electrode is preferably 10 cm or less.
- Such a thin battery stack is particularly advantageous to be installed in the lower part of the vehicle body as a power source for electric vehicles.
- the pressure loss of the supplied gas can be reduced.
- batteries that use air as the oxidant and high-concentration hydrogen gas as the fuel gas need to supply a larger amount of air than the fuel.
- the flow path of the oxidizing gas is made almost straight along the long side of the separator plate.
- the pressure loss can be suppressed to a small value by using a pen-in type having a straight portion along the long side and a small number of turns of about two.
- water is generated by an electrode reaction, and in order to efficiently remove the water, it is generally required to increase the supply pressure of an oxidizing gas.
- the generated water can be removed efficiently, keeping the pressure loss of air supply small.
- the power source side conductive separator plate has a cooling water flow path having a linear portion along a long side of the rectangle on the back surface, and a flow direction of the oxidizing gas in the linear portion of the gas flow path.
- the flow path of the fuel gas can be a serpentine-in type consisting of a straight part along the short side of the separator plate and a sunset part arranged on the long side. Similar to the flow path, it is preferable to use a serpentine type including a straight portion along the long side and a sunset portion located on the short side.
- the flow path of the oxidizing gas and the fuel gas is a serpentine-in type consisting of a straight section along the long side and a sunset section located on the short side
- the flow path of the oxidizing gas is the number of turns. However, it is most preferable that the number of turns in the fuel gas flow path is 2 or 4. In this case, it is preferable that the flow path of the cooling water be the same as the pen-in type.
- the groove forming the gas flow path or the cooling water flow path crosses the center of both surfaces of the separator plate. Therefore, depending on the arrangement of such grooves, if a material having low bending strength is used for the separation plate, cracks may occur and battery life may be shortened.
- the center line of the protrusion formed between the grooves on one surface of the separation plate and the center line of such a protrusion formed on the other surface are inevitable parts. Except for, the reduction in strength is suppressed by substantially matching, Conventionally, the bending strength of the separation plate has been limited to 100 Pa, but according to the configuration of the present invention as described above, even if the bending strength is less than lOOPa, about 70 Pa is practical. It becomes possible.
- the width of the gas channel groove provided on the surface of the conductive separator plate is 1.5 mm! It is preferable that the width of the rib portion between the grooves is 0.4 mm to 1.5 mm. Thereby, the contact resistance with the electrodes and the electrolyte membrane can be kept low, and the pressure loss of the supply gas can be suppressed.
- the manifolds for supplying and discharging the oxidizing gas, the fuel gas, and the cooling water, respectively, are preferably provided near the short sides of the rectangular separation plate. According to the present invention, the fuel cell stack can be made thinner and more compact, and the pressure loss of the supplied gas can be reduced.
- FIG. 1 is a sectional view showing a main part of the fuel cell according to the present embodiment.
- the fuel cell 1 is a single cell composed of a hydrogen ion conductive polymer electrolyte membrane 2 and a cathode 3 and an anode 4 sandwiching the electrolyte membrane 2, which are stacked via a conductive separator plate.
- the conductive separator plate inserted between the cells has an oxidizing gas flow path 6 on one side, a fuel gas flow path 7 on the other side, and a cathode-side separator plate.
- a single separator plate 5 having the function of a separator plate on the anode side, and a passage 6 for oxidizing gas on one surface and a passage 8 for cooling water on the other surface.
- a composite separator plate combining a separator plate 9a having a cooling water flow path 8 on one surface and a fuel gas flow path 7 on the other surface.
- a composite separator plate for cooling water is inserted for every two cells.
- 10 denotes a gasket for preventing leakage of gas and cooling water.
- the cathode-side conductive separator plate 11 shown in FIG. 2 has a rectangular shape, and one of the short sides thereof has an oxidant gas inlet manifold 12 a and a fuel gas outlet manifold. 13b and cooling water inlet manifold 14a, and the other short side of the oxidizing gas outlet manifold 1 2b, fuel gas inlet manifold 13a and cooling water
- the outlet manifold has 14b.
- a gas passage 15 extending from the inlet manifold 12a to the outlet manifold 12b of the oxidizing gas is formed. It has been.
- the gas flow path 15 is formed by 10 parallel grooves.
- the gas flow path 15 has a serpentine-in type structure consisting of a straight part 15 s and a turn part 15 t serving as a turn-back part, and the number of evening parts is two.
- the anode side separator plate 21 shown in FIG. 3 has a rectangular shape like the separator separator plate 11, and one of the short sides thereof is a Roman manifold 22 a, containing an oxidizing gas. It has a fuel gas outlet manifold 23b and a cooling water inlet manifold 24a, and has an oxidant gas outlet manifold 22b on the other short side, and a fuel gas inlet manifold It has 23 a and cooling water outlet 24 b.
- a gas flow path 25 extending from the fuel gas inlet manifold 23 a to the outlet manifold 23 b is formed. Have been.
- the gas passage 25 is formed by six parallel grooves.
- the gas flow path 25 has a straight section 25 s and a turn It is a serpent evening-in type structure consisting of 25 tons, and the number of evening sections is four.
- the anode separator plate 21 has a cooling water flow path from the inlet manifold 24a of the cooling water to the outlet manifold 24b on the back of the plate. 26 are formed.
- the flow path 26 is formed by six parallel grooves in this example.
- the flow path 26 has a sagittal pentane type structure including a straight part 26 s and a turn part 26 t serving as a turn-back part.
- the separator plate inserted between the cells has a fuel gas flow path as shown in FIG. 3 formed on the back of the separator plate in FIG.
- the cooling section is composed of an anode-side separator plate 21 with a cooling water flow path formed on the back surface, and a power source separator plate shown in Fig. 2.
- a composite separation plate with a cooling water flow path as shown in Fig. 4 formed on the back surface of plate 11 is used.
- the rectangular portions surrounded by the dashed lines shown in the figures are the portions in contact with the force source and the anode.
- the flow path 15 of the oxidizing gas is composed of 10 parallel grooves, and three straight portions 15 s are connected by two evening portions 15 t. That is, it has 30 grooves extending linearly along the long sides of the rectangle.
- the fuel gas flow path 25 is composed of six parallel grooves, and five straight parts 25 s are connected by four turn parts 25 t. That is, the gas flow path 25 has 30 grooves extending linearly along the long sides of the rectangle.
- the cooling water channel also has 30 grooves extending linearly along the long sides of the rectangle.
- the center of the groove forming the linear portion of each gas flow path. Lines can be matched.
- the center line of the groove that forms each flow path Can be matched.
- FIG. 5 is a front view of the power plate side conductive separation plate.
- Separation plate 31 is rectangular, and one of the short sides of the separator plate 31 is an oxidizer gas inlet manifold 32a, a fuel gas inlet holder 33a, and a cooling water inlet holder 34
- the other side has an oxidant gas outlet manifold 32b, a fuel gas outlet manifold 33b, and a cooling water outlet manifold 34b.
- the gas flow path 35 extending from the inlet manifold 32a of the oxidizing gas to the outlet manifold 32b is constituted by 35 linear grooves.
- FIG. 6 is a front view of the anode-side conductive separation plate.
- Separation plate 41 is rectangular, and one of the short sides is an inlet manifold for oxidizing gas 4 2a, a Roman gas holder for fuel gas 4 3a and a Roman gas holder for cooling water 4 4 a, and an outlet for the oxidant gas on the other short side.
- a gas flow path 45 extending from the fuel gas inlet manifold 43a to the outlet manifold 43b is formed by six parallel grooves.
- the gas flow path 45 has a serpentine structure including a straight portion 45 s and a turn portion 45 t serving as a turn-back portion, and the number of turn portions is 12.
- the separator plate 71 shown in Fig. 7 has the oxidizing gas-introducing manifold 72a and the outlet manifold 72b on the short side, and the fuel gas inlet on the long side close to them.
- Manifold 73a, outlet manifold 73b, cooling water inlet manifold 74a, outlet manifold 74b are provided.
- the gas flow path 75 extending from the inlet manifold 72 a of the oxidizing gas to the outlet manifold 72 b is formed of a linear groove whose width is gradually reduced.
- the flow path of the fuel gas and cooling water has a serpentine type structure having a straight part and an evening part similar to FIG. Embodiment 4
- the separation plate 81 shown in Fig. 8 has an oxidant gas inlet manifold 8 2a and an outlet manifold 8 2b on the short side, and the fuel gas inlet on the long side, close to them.
- the oxidant gas flow path 85 is connected to the inlet manifold 82a and the outlet manifold 82b, respectively, and is connected to the straight sections 85a and 85b parallel to the long sides.
- the straight portion 85c is composed of a small number, and the straight portion 85c is slightly inclined with respect to the long side.
- the separator plate 91 shown in Fig. 9 has an oxidant gas inlet manifold 92a and an outlet manifold 92b on the short side, and the fuel gas on the long side near the outlet manifold 92b.
- An inlet manifold 93a, an outlet manifold 93b and a cooling water inlet manifold 94a and an outlet manifold 94b are provided.
- the oxidant gas flow path 95 includes straight portions 95a and 95b connected to the inlet manifold 92a and the outlet manifold 92, respectively, and a portion 95c connecting the two.
- the straight portions 95a and 95b have the same width of each groove, but the latter has one less groove than the former. In this configuration, the flow path of the oxidizing gas is substantially straight, although the portion 95c is discontinuous.
- FIG. 10 shows the force-sword-side conductive separator plate used in this example.
- Separator plate 101 on the force sword side has an oxidant gas on one short side. It has a manifold 102a, a fuel gas outlet manifold 103b and a cooling water inlet manifold 104a, and has an oxidant gas outlet manifold on the other short side. 1 0 2 b, fuel gas inlet manifold
- the flow path 105 of the oxidizing gas is formed by three parallel grooves, and five straight portions are connected by four turn portions.
- the gas flow path on the anode side is composed of three parallel grooves, and five straight sections are connected by four evening sections.
- the flow path of the cooling water also has a similar pentane type structure.
- MEA was produced as follows.
- carbon fines US Kyabo' preparative Co. VX C 7 2, primary particle diameter: 3 0 nm, specific surface area: 2 5 4 m 2 / g ) , the average particle size of about 3 0 7 platinum particles A 5 : 25 supported by weight ratio.
- a dispersion of this catalyst powder in isopropanol was mixed with ethyl alcohol dispersion of perfluorocarbon sulfonic acid powder to prepare a catalyst paste.
- a force-pumping paper (TGP-H-120) manufactured by Toray having a thickness of 360 Xm was used.
- This force paper is impregnated with an aqueous dispersion of polytetrafluoroethylene (NEOFLON ND1 manufactured by Daikin Industries, Ltd.), dried, and heat-treated at 400 ° C for 30 minutes to repel. Aqueous was given.
- the catalyst paste was uniformly applied to one surface of the water-repellent carbon paper to form a catalyst layer.
- Two electrodes made of carbon paper produced by the above method were laminated with a polymer electrolyte membrane (Naphion 112, manufactured by Dupont, USA) sandwiched between them, with the catalyst layer inside, and then dried.
- a polymer electrolyte membrane Naphion 112, manufactured by Dupont, USA
- the above carbon paper electrode is a rectangle having a size of 20 ⁇ 6 cm and covers five sections surrounded by a dashed line of the separation plate 101 shown in FIG.
- a polymer electrolyte membrane is A gasket made of a silicone rubber sheet having a thickness of 360 m was arranged and hot pressed at 130 ° C for 3 minutes to obtain an MEA.
- the two MEAs were combined with a separator plate as shown in Fig. 10 having a flow path for oxidizing gas formed on one surface and a flow path for fuel gas formed on the other surface.
- a separator plate as shown in Fig. 10 having a flow path for oxidizing gas formed on one surface and a flow path for fuel gas formed on the other surface.
- two separate separators with a structure as shown in Fig. 10 were formed, in which cooling water channels were formed on the surfaces facing each other, and oxidizing gas channels and fuel gas channels were formed on the other surfaces, respectively.
- Combined boards were stacked to assemble a stacked battery having a configuration as shown in FIG. 1 in which 10 cells were connected in series.
- the separator plate is a 2 mm thick sheet with gas channels formed by hot pressing a mixed powder of carbon powder and phenolic resin, and the gas channels have a width of 2.5 mm. , The depth is 0.7 mm and the width of the rib between the grooves is 1.5 mm.
- the bending strength of the conductive separator plate was 70 MPa.
- a metal current collector, an insulating plate made of an electrically insulating material, and an end plate were overlaid on both ends of the above-mentioned laminated battery, and both end plates were fastened with a fastening rod.
- the fastening pressure was set to l O kgf Z cm 2 per area of the separation plate. Pure hydrogen is supplied as fuel gas to this 10-cell battery module through a deionized water bubbler maintained at 75 ° C, and air is supplied as an oxidant gas through a deionized water bubbler maintained at a predetermined temperature. Then, a power generation test was conducted through cooling water. Fuel gas, oxidizer gas, and cooling water were all introduced in the same direction, and the gas outlet was opened to normal pressure.
- the electrodes are divided into five parts as shown by the dashed line on the separation plate 101 in Fig. 10, and the electrodes are made to correspond to the electrodes.
- the separator plate was also divided into five parts so that the performance of each part could be measured individually.
- the battery operating temperature was set at 75 ° C, and in order to minimize the temperature distribution, the cooling water volume set at 75 ° C was flowed at a relatively large amount of 20 LZmin, and the utilization rate of hydrogen in the fuel gas was reduced.
- the temperature dependence of the voltage characteristics of the stacked battery at an oxidizing gas bubbler at a constant current density of 0.3 AZ cm 2 and 0.7 AZ cm 2 was investigated.
- the divided cell closest to the gas inlet side of each of the five divided cells is designated as No. 1, and the divided cells closest to the gas outlet side are designated as No. 2, No. 3, and No. 4 in order. .5.
- each of the 1 0 batteries cell stack The average voltage of each divided cell was 0.69 V for No. 1 cell and 0.65 V for No. 5 cell. (Hereinafter, all characteristics of the divided cell are 1 unless otherwise noted.) Represents the average value of each divided cell of a battery with 0 cells stacked.) When the bubbler temperature was increased to about 70 ° C, the performance further increased, and the No. 1 cell showed 0.75 V and the No. 5 cell showed 0.70 V. At this time, it was found from measurement of the internal resistance that the No.
- the conductive separator plate In the conductive separator plate, at least a plurality of gas flow paths or grooves forming a cooling water flow path traverse the center portion thereof, and the grooves on one surface are formed by these grooves.
- the position of the center line of the convex portion between them substantially coincides with the position of the center line of the convex portion on the other surface, except for inevitable parts. Therefore, even if the material of the conductive separation plate had a bending strength slightly lower than 100 MPa and a low mechanical strength, it could be used without cracking or buckling.
- the cathode-side conductive separator plate has a linear gas flow path as shown in FIG. 5, and the anode-side conductive separator plate has a number of turns as shown in FIG.
- Each of the four types having a gas passage having a pen-in type structure was used.
- the flow path of the cooling water was a heat-and-sink type structure with four evenings as shown in FIG.
- the size of the electrode is a rectangle of 35 ⁇ 9 cm, and in each cell, the portion shown by the dashed line in FIG. 5 is divided into five in the gas flow direction of the gas flow path 35.
- the oxidizing gas bubbler temperature is about At a relatively low temperature of 40 ° C, the performance near the gas inlet and the performance near the gas outlet are almost the same, 0.59 V for the No. 1 cell and 0 for the No. 5 cell. 5.7 V. Raising the bubbler temperature to 65 ° C further improved performance. The characteristics were higher near the gas inlet, with 0.62 V for the No. 1 cell and 0.59 V for the No. 5 cell. At this time, from the measurement of the internal resistance, it was found that the cells near the outlet tended to be flooding, but were generally in a good wet state. When the temperature of the oxidizing gas bubbler is 65 ° C, the pressure loss at the gas inlet is
- the current density of 0. 3 A / cm 2, at a relatively low temperature of the oxidizer Gasubabura first temperature is 4 5 ° C extent substantially equal performance near the site to the site and a gas outlet near the gas inlet, N o .1 cell and N .5 cell
- the cathode-side separator plate has a straight gas flow path as shown in FIG. 5, and the anode-side conductive separator plate has a straight line along the short side as shown in FIG.
- Each of them had a serpentine-in type gas flow path with 12 turns and 12 turns.
- the depth of the groove constituting the gas flow path was 0.4 mm.
- the cooling water flow path was a serpentine-type structure with an even number of six.
- the size of the electrode was a rectangle of 20 ⁇ 9 cm, and each cell was divided into five in accordance with the flow path of the fuel gas, as in Example 1.
- the battery performance was examined under the same conditions as above except that the flow was relatively low at 1 LZmin.
- the cathode-side conductive separator plate shown in FIG. 7 was used.
- the flow path 75 of the oxidizing gas is composed of a plurality of continuous linear grooves from the inlet manifold 72 a to the outlet manifold 72 b, and the flow path is narrowed from the inlet to the outlet. It has a shape.
- the part in contact with the electrode is a trapezoid with a short side of 7 cm, a long side of 9 cm and a height of 20 cm.
- This separation plate has a thickness of 3 mm, the surface of which is cut by cutting, the gas inlet has a groove width of 2 mm, a depth of 0.5 mm, and the rib between the grooves has a width of l mm.
- the gas outlet has a gas channel with a groove width of 1.6 mm, a depth of 0.5 mm, and a width of the rib between the grooves of 0.8 mm. Dense glassy carbon was used as the separator plate material.
- anode-side conductive separator plate As the anode-side conductive separator plate, a plate having a gas passage of a sa-pentaine structure having 12 turns as in Example 3 was used.
- the cooling water flow path was a pen-in type with six turns.
- a 100-cell laminated battery was assembled in the same manner as in Example 1 except for the above.
- the battery operating temperature was set at 75 ° C
- the cooling water flow set at 75 ° C was flowed at a relatively large rate of 20 L / min
- the average cell voltage of a 100-cell stacked battery is the current density of 0.3
- the average cell voltage of the battery was 0.7 V at a current density of 0.3 AZ cm 2 , and the pressure loss at the gas inlet on the air side was 0.70 llkg 'f Z cm 2, which was quite small.
- the average cell voltage at a current density of 0.7 AZ cm 2 was 0.6 IV, and the pressure loss at the gas inlet on the air side was as low as 0.05 kg ⁇ f Z cm 2 .
- a cathode-side conductive separation plate shown in FIG. 8 was used.
- This conductive separation plate has a substantially rectangular shape in contact with the electrode, with a short side of 9 cm and a long side of 2 Ocm.
- the groove forming the oxidant gas flow path 85 is substantially continuous from the inlet manifold 82 a to the outlet manifold 82 b along the longer side.
- This separation plate has a thickness of 3 mm, and its surface is cut by cutting to have a groove width of 2 mm at the inlet, 0.4 mm depth, a width of 1 mm between the ribs between the grooves, and an outlet.
- Dense glassy carbon was used as the separator plate material.
- anode-side conductive separator plate As the anode-side conductive separator plate, a plate having a gas passage having a sapentine type structure in which the number of evening portions was 12 as in Example 3 was used.
- the cooling water flow path was a pen-in type with six turns.
- the average cell voltage of the stacked battery is when the current density is 0.3 AZ cm 2
- the average cell voltage of the stacked battery is 0.7 V when the current density is 0.3 AZ cm 2 , and the pressure loss at the gas inlet on the air side is 0.0
- a cathode side conductive separation plate shown in FIG. 9 was used.
- the gas passage 95 of the conductive separation plate has a discontinuous portion 95c in the middle thereof, but is substantially formed of linear parallel grooves.
- This separation plate has a thickness of 3 mm, and the surface of the separation plate is cut to form a gas passage with a groove width of 1.5 mm, a depth of l mm, and a rib width of 1 mm between the grooves. It is. Dense glassy carbon was used as the separation plate material.
- As the anode-side conductive separation plate a plate having a serpentine-in type gas channel having 12 turns as in Example 3 was used. The cooling water flow path was a serpent evening-in type with six evenings.
- a 100-cell laminated battery was assembled in the same manner as in Example 1 except for the above.
- the battery operating temperature was set at 75 ° C
- the cooling water volume set at 75 ° C was flowed at a relatively large amount of 20 L / in
- the average cell voltage of a stacked battery is at a current density of 0.3 A / cm 2
- the average cell voltage of the stacked battery is when the current density is 0.3 AZ cm 2
- the portion of the conductive separator plate that contacts the electrode has a substantially rectangular shape, and the longer side of the substantially rectangular shape is twice as long as the shorter side is used. Strictly rectangular, strictly trapezoidal, parallelogram, rounded corners, and other irregularities The same effect can be obtained even if it has a substantially rectangular shape.
- the shape of the gas flow channel groove having a substantially straight portion along the long side of the substantially rectangular shape is not completely straight, and even if it has an inflection point, for example, it may be slightly inclined with respect to the long side. The same effect can be obtained even if the groove width changes. Comparative Example 1
- the cathode-side conductive separation plate shown in FIG. 12 was used.
- This separation plate 1 2 1 is almost square, and the oxidizing gas inlet manifold 1 2 a and the outlet manifold 1 2 2 b are provided on two opposing sides, and on the other two sides.
- the oxidant gas passages 125 are constituted by parallel linear grooves.
- the fuel gas flow path and the cooling water flow path are of a heat sink-in type, and each has two turns.
- This separator plate has a thickness of 3 mm, and its surface is cut to form a gas flow path 125 with a groove width of 2 mm, a depth of 0.5 mm, and a rib part width of 1 mm between the grooves. Is provided. A dense glassy carbon was used as the separation plate material.
- the electrode was a square with a side of 15 cm, and the electrode was set at the center of a polymer electrolyte membrane having a square of 21 cm on a side.
- the average cell voltage of the stacked battery is 0.48 when the current density is 0.3 AZ cm z V. At current densities of 0.7 AZ cm 2 or more, cells with a voltage of 0 V or less appeared due to overflooding, making it impossible to measure the characteristics. Comparative Example 2
- the separator plate 13 1 is rectangular, with an inlet manifold 13 2 a for oxidant gas and an outlet manifold 13 2 b on the opposite long sides, and fuel gas on the short side.
- the oxidant gas flow path 135 is composed of parallel linear grooves.
- the fuel gas flow path and the cooling water flow path are serpentine-in type, and the number of turns is 2 for both.
- This separator plate has a thickness of 3 mm, and the surface is cut to form a gas flow channel with a groove width of 2 mm, a depth of 0.5 mm, and a rib width of 1 mm between the grooves. ing.
- the electrodes are rectangular with 9 cm x 20 cm.
- a 100-cell laminated battery was assembled in the same manner as in Example 1 except for the above.
- the battery operating temperature was set at 75 ° C
- the average cell voltage of the laminated battery was 0.42 V at a current density of 0.3 AZ cm 2 .
- current densities of 0.7 AZ cm 2 or more cells with a voltage of 0 V or less appeared due to overflooding, making it impossible to measure the characteristics. Comparative Example 3
- the cathode side conductive separation plate shown in FIG. 14 was used.
- the separation plate 1 4 1 is rectangular.
- an oxidant gas inlet manifold 144a, fuel gas inlet manifold 144a and cooling water inlet manifold 144a are provided, and the other short side
- An oxidant gas outlet manifold 144b, a fuel gas outlet manifold 144b, and a cooling water outlet manifold 144b are provided at the bottom.
- the oxidant gas flow path 144 is formed of parallel linear grooves.
- the width of each opening of the gas manifolds 144a and 142b is smaller than the sum of the widths of the grooves of the gas flow paths connected to these manifolds.
- the fuel gas flow path and the cooling water flow path are of the pen-in type, and the number of pumps is two in each case.
- a 100-cell laminated battery was assembled in the same manner as Comparative Example 2 except for the above.
- the battery operating temperature was set at 75 ° C
- the cooling water flow set at 75 ° C was made to flow at a relatively large rate of 20 L / min
- the average cell voltage of the laminated battery was 0.40 V at a current density of 0.3 AZ cm 2 .
- current densities of 0.7 AZ cm z or more the opening of the air outlet manifold is small with respect to the flow path width on the whole air side, so the generated water cannot be removed smoothly, and it is 0 V or less. A new cell appeared, making it impossible to measure the characteristics.
- the conductive separator plate has a linear oxidant gas flow path as shown in Fig. 5, and a serpentine-in type fuel with four evens as shown in Fig. 10.
- a serpentine-in type fuel with four evens as shown in Fig. 10.
- One having a gas flow path was used.
- This separator plate has a thickness of 3 mm, and the surface of the plate is cut to form a gas passage with a groove width of 2 mm, a depth of 0.5 mm, and a rib width of 1 mm between the grooves. It is.
- the electrodes are 60 cm X 9 cm rectangles.
- a 100-cell laminated battery was assembled in the same manner as Comparative Example 2 except for the above.
- the battery operating temperature was set at 75 ° C
- the cooling water volume set at 75 ° C was flowed at a relatively large amount of 20 L / in
- the average cell voltage of the laminated battery was 0.72 V at a current density of 0.3 AZ cm 2 .
- the current density of 0.7 AZ cm 2 showed a relatively good characteristic of 0.62 V.
- the pressure loss of the feed air gas current density 0.3 when AZ cm 2 0. 2 kgf Z c rrr ', 0. 8 kgi Z cm 2 becomes a current density 0. 7 AZ cm 2, Blois It was impossible to supply air. For this purpose, air was supplied using a compressor. Also, the pressure loss of the supply cooling water became extremely large.
- the battery operating temperature was set at 75 ° C
- the cooling water volume set at 75 ° C was flowed in a relatively large amount of 1 LZmin
- the average cell voltage of the laminated battery was 0.65 V at a current density of 0.3 A / cm 2 .
- Current density 0.7 eight / Ji 11 and the least cooling water 2, 0. 5 5 V As a result, low characteristics were exhibited. This is because the temperature distribution between the inlet and outlet of the cooling water became too tight by reducing the amount of cooling water, and the inside of the battery became over-dried.
- a force-sword-side conductive separation plate shown in FIG. 11 was used.
- This conductive separator plate is rectangular, and one side of the plate is rectangular, and one of the short sides has an inlet for oxidant gas 1 1 2 a, a manifold for fuel gas 1 1 3 a and cooling water. It has a manifold 1 1 4a, and the other side of the other side has an oxidant gas outlet manifold 1 1 2b, a fuel gas outlet manifold 1 1 3b and a coolant outlet manifold 1 It has 1 4b.
- the oxidizing agent gas flow path 1 15 is formed of five parallel grooves, and has a sa-pentaine type structure in which 10 linear portions are connected by 9 turn portions.
- the gas flow path on the anode side is also composed of five parallel grooves, and the ten straight parts are connected by nine turn parts.
- the cooling water channel has a similar pen-in structure.
- the size of the electrode was a rectangle of 9 cm ⁇ 20 cm, and each cell was divided into five as shown by the dashed line in FIG.
- the separator plate used here was 3 mm thick, and its surface was provided with a gas flow channel with a groove width of 2 mm, a depth of l mm, and a rib portion width of 1 mm between the grooves by cutting. It is.
- a dense glassy carbon was used as the material for the separation plate.
- the relatively low temperature oxidant Gasubabura first temperature is about 5 5 D C, higher characteristics as portion close to the gas inlet, N o. 1 cell 0
- the 6 V, No. 5 cell showed 0.5 V.
- the performance of the No. 5 cell at the position closest to the gas outlet was sharply reduced to almost 0 V.
- the measurement of the internal resistance revealed that the No. 5 cell was in an overflooding state.
- the pressure loss at the gas inlet was as high as 1.5 kg ⁇ ⁇ / cm 2 .
- a polymer electrolyte fuel cell battery pack thinner and more compact.
- a molecular electrolyte fuel cell can be provided.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP00974846A EP1231657A4 (en) | 1999-11-08 | 2000-11-08 | Polymer Electrolyte FUEL CELLS |
US10/129,314 US6884536B1 (en) | 1999-11-08 | 2000-11-08 | Polymer electrolyte fuel cell |
JP2001537116A JP3939150B2 (ja) | 1999-11-08 | 2000-11-08 | 高分子電解質型燃料電池 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP31672199 | 1999-11-08 | ||
JP11/316721 | 1999-11-08 |
Publications (1)
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WO2001035477A1 true WO2001035477A1 (fr) | 2001-05-17 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/007866 WO2001035477A1 (fr) | 1999-11-08 | 2000-11-08 | Pile a combustible electrolytique polymerique |
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US (1) | US6884536B1 (ja) |
EP (1) | EP1231657A4 (ja) |
JP (1) | JP3939150B2 (ja) |
KR (1) | KR100482419B1 (ja) |
CN (2) | CN100479243C (ja) |
WO (1) | WO2001035477A1 (ja) |
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JP2014203710A (ja) * | 2013-04-05 | 2014-10-27 | トヨタ自動車株式会社 | 燃料電池検査用器具およびそれを用いた検査装置 |
Also Published As
Publication number | Publication date |
---|---|
KR20020064307A (ko) | 2002-08-07 |
EP1231657A1 (en) | 2002-08-14 |
CN1399804A (zh) | 2003-02-26 |
CN1770532A (zh) | 2006-05-10 |
JP3939150B2 (ja) | 2007-07-04 |
CN1237637C (zh) | 2006-01-18 |
CN100479243C (zh) | 2009-04-15 |
KR100482419B1 (ko) | 2005-04-14 |
US6884536B1 (en) | 2005-04-26 |
EP1231657A4 (en) | 2007-04-18 |
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