WO2007138984A1 - 固体電解質形燃料電池スタック - Google Patents
固体電解質形燃料電池スタック Download PDFInfo
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- WO2007138984A1 WO2007138984A1 PCT/JP2007/060638 JP2007060638W WO2007138984A1 WO 2007138984 A1 WO2007138984 A1 WO 2007138984A1 JP 2007060638 W JP2007060638 W JP 2007060638W WO 2007138984 A1 WO2007138984 A1 WO 2007138984A1
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- WIPO (PCT)
- Prior art keywords
- fuel cell
- fixing member
- flow path
- hole
- gas flow
- Prior art date
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Classifications
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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
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/248—Means for compression of the fuel cell stacks
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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
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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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
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
-
- 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
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/2425—High-temperature cells with solid electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/2425—High-temperature cells with solid electrolytes
- H01M8/2432—Grouping of unit cells of planar configuration
-
- 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
- H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
-
- 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
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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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 solid oxide fuel cell stack in which a plurality of solid electrolyte fuel cell cells each including a solid electrolyte body having a fuel electrode and an air electrode are stacked.
- solid oxide fuel cell using a solid electrolyte (hereinafter also referred to as SOFC) is known! /.
- a stack is formed by stacking a large number of fuel battery cells each provided with a fuel electrode and an air electrode on each surface of a plate-shaped solid electrolyte body, and fuel gas is supplied to the fuel electrode.
- air is supplied to the air electrode, and electric power is generated by chemically reacting fuel and oxygen in the air through the solid electrolyte body.
- a member other than the solid electrolyte body for example, a material for a frame that supports the solid electrolyte body, a material for a member that constitutes a gas flow path, and a material for an interconnector (a member that provides cell-to-cell conduction inside the stack)
- gas flow paths penetrating the stack are provided at the four corners of the frame, and the gas flow paths are An apparatus for supplying gas to each cell has also been proposed (see Patent Document 3).
- Patent Document 1 Japanese Patent Laid-Open No. 2005-174884
- Patent Document 2 JP-A-6-349506
- Patent Document 3 JP-A-8-273691
- Patent Document 1 since it is necessary to make a joining hole for inserting a bolt into the frame separately from the gas flow path, a high-performance fuel cell with a high volumetric energy density is developed. There were some obstacles.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a solid electrolyte fuel cell stack capable of simplifying the structure and improving the energy density. It is in. Means for solving the problem
- the invention of the first embodiment is a stack of a plurality of solid oxide fuel cells each having a solid electrolyte body having a fuel electrode in contact with the fuel gas and an air electrode in contact with the oxidant gas.
- a solid electrolyte fuel cell stack comprising: a through hole that penetrates the stacked body of the solid electrolyte fuel cell in the stacking direction; and a fixing member that is inserted into the through hole.
- a pressing and fixing portion that presses and fixes in the direction, and supplies gas to the solid oxide fuel cell side in the through hole in which the fixing member is disposed, or the solid oxide fuel cell unit It is characterized by providing a gas flow path for exhausting gas from the side.
- a gas flow path for supplying gas to the solid oxide fuel cell side or exhausting gas from the solid electrolyte fuel cell side is provided in the through hole in which the fixing member is disposed. Yes.
- a space inside the fixing member or a space between the outside of the fixing member and the laminate is used as the gas flow path.
- the solid electrolyte fuel cell is a power generation unit that includes a configuration (cell body) including a fuel electrode, an air electrode, and a solid electrolyte body, and generates power by contact with gas.
- the invention of the second embodiment is characterized in that the gas flow path is constituted by the fixing member.
- a part or all of the gas flow path can be configured by providing a space inside the fixing member or providing a groove on the outer peripheral surface.
- the invention of the third embodiment is characterized in that the fixing member is provided with the gas flow path therein.
- the fixing member in the present invention is a member having a gas flow path (internal gas flow path) inside, such as a hollow bolt, for example, by using this fixing member, a solid oxide fuel cell unit is used.
- the solid oxide fuel cell A communicating gas flow path (internal matrix) can be easily realized.
- the gas flow path inside the fixing member has a gas flow path that connects the inside of the through hole and the outside of the laminate. .
- the invention of the fifth embodiment is characterized in that a space communicating with the gas flow path inside the fixing member is provided between the fixing member and the laminate.
- the gas supplied from the gas flow path inside the fixed member is supplied to each solid oxide fuel cell.
- a space is provided on the outer peripheral side of the fixed member, By communicating with the gas flow path of the solid oxide fuel cell, gas can be easily supplied to the cell side (via the space) wherever the opening is provided on the outer peripheral side of the fixing member. I can help. The same can be said for gas discharge.
- the inner diameter of the through hole is set to be larger than the outer diameter of the fixing member by a predetermined amount or more.
- a space formed by the peripheral surface for example, a cylindrical space such as a cylindrical shape) is suitable.
- the fixing member is a long member (for example, a rod-shaped member), and the gas flow path inside the fixing member extends in the longitudinal direction of the fixing member.
- a special feature is that an axial gas flow path and a lateral hole that communicates with the axial gas flow path and opens to the outer peripheral side of the fixing member are provided.
- the present invention exemplifies a preferable shape of the fixing member.
- the fixing member is a hollow bolt.
- the present invention exemplifies a fixing member. That is, if a hollow bolt is used, the inner space can be used as a gas flow path.
- the invention of the eighth embodiment is characterized in that a groove that communicates the inside of the through hole and the outside of the laminate is provided on the outer peripheral surface of the fixing member.
- the groove functioning as the gas flow path is provided not on the inside of the fixing member but on the outer side (outer peripheral surface), it is easy to form the gas flow path. That is, by this groove, the inside of the through hole (for example, the space formed by the outer peripheral surface of the fixing member and the inner peripheral surface of the through hole) is connected to the outside of the laminated body (for example, communicated with the through hole). Nuts and pipes).
- a gas flow path reaching the inside of the through hole can be formed via the.
- the engaging member that engages with the fixing member for example, a bolt
- a communication hole that communicates the inside of the through hole and the outside of the laminate is provided inside (for example, a nut).
- the present invention shows an example of forming a gas flow path.
- the inside of the pipe connected to the through hole communicates with the space formed on the outer peripheral surface side of the fixing member.
- a communication hole is provided.
- the inside of the through hole and the outside of the laminate are formed on the inner peripheral surface of an engaging member (for example, a nut) that engages with the fixing member (for example, a bolt). It is characterized by providing a groove communicating with the.
- an engaging member for example, a nut
- the fixing member for example, a bolt
- the present invention shows an example of forming a gas flow path.
- a groove is provided on the inner peripheral surface of the nut, for example, the inside of the pipe connected to the through hole (through which the fixing member is penetrated) communicates with the space formed on the outer peripheral surface side of the fixing member.
- a groove is provided as described above.
- a tubular body that is externally fitted to the fixing member is disposed in the through hole, and a gas flow path is provided inside and outside the tubular body, Further, the cylindrical body is characterized in that a communication hole is provided to communicate the gas flow path between the inside and the outside.
- the fixing member is a long member in which a plurality of members are connected in the axial direction.
- a necessary length can be secured by connecting a plurality of members in the axial direction using, for example, a screw fitting structure.
- the invention of the thirteenth embodiment is characterized in that the pressing and fixing portion further includes an engaging member that engages with the fixing member.
- the present invention exemplifies a pressing and fixing portion.
- the fixing member is a bolt
- a nut can be used as the engaging member. Therefore, the laminated body can be clamped and fixed with bolts and nuts.
- the solid electrolyte fuel cell encloses a cell body including the fuel electrode, the air electrode, and the solid electrolyte body from the outer peripheral side in the planar direction.
- the fixing member penetrates the frame part.
- the present invention exemplifies a configuration in which the fixing member penetrates the outer peripheral frame portion of the solid oxide fuel cell.
- examples of the frame portion include a structure in which a plurality of frames (metal frame, insulating frame, etc.) are laminated. Further, when there is no frame portion, a through hole may be provided on the outer peripheral side of the cell body and the fixing member may be disposed in the through hole.
- the degree of thermal expansion of the fixing member is the degree of thermal expansion of the laminate pressed by the fixing member (for example, thermal expansion coefficient). ) Smaller than that.
- the thermal expansion coefficient of the fixing member is smaller than the thermal expansion coefficient of the laminate! /, And even when the solid electrolyte fuel cell stack becomes high temperature, the elongation of the fixing member is smaller than the elongation of the laminate. ! /, So it is difficult to reduce the pressing force! /!
- the degree of thermal expansion can include the dimension that is expanded when the thermal expansion occurs.
- the invention of the sixteenth embodiment is characterized in that an insulating member that blocks conduction between both members is disposed between the fixing member and the laminate.
- the pressing part between the fixing member and the laminated body It is characterized by sealing.
- a sealing member for example, a metal gasket, a microphone sheet, or the like
- a sealing member for example, a metal gasket, a microphone sheet, or the like
- the invention of the eighteenth embodiment is characterized in that a heat resistant alloy is used as the material of the fixing member.
- the present invention exemplifies the material of the fixing member.
- the solid electrolyte body may move a part of one of the fuel gas introduced into the fuel electrode or the oxidant gas introduced into the air electrode during the operation of the battery as ions. It has ionic conductivity. Examples of these ions include oxygen ions and hydrogen ions.
- the fuel electrode comes into contact with the fuel gas serving as a reducing agent and functions as a negative electrode in the cell.
- the air electrode is in contact with an oxidant gas that becomes an oxidant and functions as a positive electrode in the cell.
- Examples of the material of the solid electrolyte body include ZrO-based ceramics, LaGaO-based ceramics, B
- ZrO-based ceramics such as zirconium oxide stabilized by at least one of metals such as Ni and Fe and rare earth elements such as Sc and Y, CeO-based ceramics, etc.
- Ceramics such as ceramics.
- metals such as Pt, Au, Ag, Pd, Ir, Ru, Rh, Ni, and Fe can be mentioned. These metals may be only one kind or an alloy of two or more kinds of metals. Furthermore, a mixture (including cermet) of these metals and / or alloys and at least one of each of the above ceramics may be mentioned. Further, there may be mentioned a mixture of a metal oxide such as Ni and Fe and at least one of each of the above ceramics.
- the material of the air electrode for example, various metals, metal oxides, metal double oxides, and the like can be used.
- the metal include metals such as Pt, Au, Ag, Pd, Ir, Ru, and Rh, or alloys containing two or more metals.
- a metal oxide La, Examples thereof include oxides such as Sr, Ce, Co, Mn and Fe (La 2 O 3, SrO, Ce 2 O 3, Co 2 O 3, MnO and FeO).
- a double oxide containing at least La, Pr, Sm, Sr, Ba, Co, Fe and Mn (La Sr CoO double oxide, La Sr FeO double oxide, La Sr Co Fe O complex oxide, La Sr MnO complex oxide, Pr
- the material of the fixing member and the engaging member materials having excellent heat resistance, chemical stability, strength, etc. can be used.
- ceramic materials such as alumina and zirconia, stainless steel, nickel-base alloy, Examples thereof include metal materials such as heat-resistant alloys such as chromium-based alloys.
- examples of the stainless steel include ferritic stainless steel, martensitic stainless steel, and austenitic stainless steel.
- ferritic stainless steel examples include SUS430, SUS434, and SUS405.
- examples of the manoletensitic stainless steel may include SUS403, SUS410, and SUS431.
- SUS201, SUS301, SUS305, etc. can be cited as examples of talented stainless steel maoka.
- examples of the Nikkenore base alloy include Inconnole 600, Inconnole 718, Incoloy 802, and the like.
- examples of the chromium-based alloy examples include Ducrlloy CRF (94Cr5FelY 2 O 3).
- ⁇ A force capable of adopting the same metal material or ceramic material as the fixing member as the material of the member constituting the frame portion.
- the thermal expansion coefficient of the fixing member is smaller than that of the frame portion. Is preferably used.
- a fuel gas is introduced to the fuel electrode side and an oxidant gas is introduced to the air electrode side.
- Examples of the fuel gas include hydrogen, a hydrocarbon as a reducing agent, a mixed gas of hydrogen and hydrocarbon, a fuel gas obtained by passing these gases through water at a predetermined temperature and humidifying them, and water vapor is added to these gases.
- the mixed fuel gas etc. are mentioned.
- the hydrocarbon is not particularly limited, and examples thereof include natural gas, naphtha, and coal gasification gas. Hydrogen is preferred as this fuel gas. These fuel gases may be used alone or in combination of two or more. It also contains 50% by volume or less of inert gas such as nitrogen and argon! /!
- Examples of the oxidant gas include a mixed gas of oxygen and another gas. Further, this mixed gas may contain 80% by volume or less of an inert gas such as nitrogen and argon. Yes. Of these oxidant gases, air (which contains about 80% by volume of nitrogen) is preferred because it is safe and inexpensive.
- FIG. 1 is a perspective view showing a solid oxide fuel cell stack of Example 1.
- FIG. 1 is a perspective view showing a solid oxide fuel cell stack of Example 1.
- FIG. 2 is an explanatory view showing a state where the solid oxide fuel cell stack is disassembled and a state when viewed from the front.
- FIG. 3 is an explanatory view showing a state in which a solid oxide fuel cell is disassembled.
- FIG. 4A is an explanatory view showing a state in which a solid oxide fuel cell is disassembled.
- 4B is a plan view showing a state in which the main part is assembled.
- FIG. 5 is an explanatory diagram showing the bolt and its usage in a broken state.
- FIG. 6A is an explanatory view showing air flow paths in the stack
- FIG. 6B is an explanatory view showing fuel gas flow paths in the stack.
- FIG. 7A-7E FIG.
- FIG. 8A is a plan view of the connection member of Example 2
- FIG. 8B is an explanatory view showing the bolt and its usage state
- FIG. 8C is an 8C-8C cross section of FIG. 8B. It is sectional drawing.
- FIG. 9A is a plan view of the connection member of Example 3
- FIG. 9B is an explanatory view showing the bolt and its use state in a broken state
- FIG. 9C is a cross-sectional view showing the 9C 9C cross section of FIG. FIG.
- FIG. 10A is a plan view of the connection member of Example 4
- FIG. 10B is an explanatory view showing the bolt and its usage state
- FIG. 10C is a cross-sectional view of FIG. FIG.
- FIG. 11A is a plan view of the connection member of Example 5
- FIG. 11B is an explanatory view showing the bolt and its usage state
- FIG. 11C is a cross-sectional view of 11C 11C of FIG. FIG.
- the solid oxide fuel cell stack 1 of this embodiment includes a fuel gas (for example, hydrogen) and an oxidant gas (for example, air (specifically, oxygen in the air)). It is a device that generates electricity by receiving the supply.
- a fuel gas for example, hydrogen
- an oxidant gas for example, air (specifically, oxygen in the air)
- This solid oxide fuel cell stack 1 includes a laminate (stack body) 5 in which a plurality (eg, 8) of solid electrolyte fuel cells 3 are laminated, and a stack arranged around the laminate 5. Bolts (fixing members) 7 to 21 that penetrate the body 5 in the stacking direction are provided.
- the solid oxide fuel cell 3 is a so-called fuel electrode supporting membrane type cell, and a fuel electrode (anode) 25 is disposed on the fuel gas flow path 23 side.
- a thin-film solid electrolyte body 27 is formed on the upper surface of the fuel electrode 25 in the figure, and an air electrode (force sword) 29 is formed on the surface of the solid electrolyte body 27 on the air flow path 31 side.
- a current collector 35 (for example, LSCF, LSM, etc. similar to the air electrode 29) is disposed.
- the fuel electrode 25, the solid electrolyte body 27, and the air electrode 29 that actually generate power are referred to as a cell body 37.
- this solid oxide fuel cell 3 includes a pair of upper and lower metal interconnectors 33 and 39 and metal air on the air flow path 31 side.
- FIG. 4B shows a state in which the interconnectors 33 and 39 are removed.
- a frame 49 of the solid electrolyte fuel cell 3 is configured! /.
- the bolts 7 to 21 are members used for restraining the solid electrolyte fuel cell 3 by pressing the laminate 5 in the stacking direction. Is used.
- first Bonorets 15 to 21 for simply pressing the solid oxide fuel cell 3 and a gas flow path in which fuel gas or air flows are provided.
- the number of second bolts 7 to 13 used can be appropriately selected according to the rating of the solid oxide fuel cell stack 1 and the like.
- the second bolts 7 to 13 include air bolts 7, 9 and the like having air gas flow paths.
- fuel bolts 11 and 13 equipped with gas passages for fuel gas are fuel bolts 11 and 13 equipped with gas passages for fuel gas.
- the number of second bolts 7 to 13 used can be appropriately selected according to the structure and rating of the solid oxide fuel cell stack 1. For example, if the flow rate of air is 3 times the flow rate of fuel gas, use 4 bolts 7 and 9 for air (combined input and output) and use bolts 11 and 13 for fuel (combined input and output) The power of using two S is possible.
- air bolts 7 and 9 and the fuel bolts 11 and 13 have the same structure, and therefore, description will be made below using, for example, the air bolt 7.
- the bolt 7 for air is a long cylindrical hollow bolt, and hexagonal nuts (engaging members) 50, 51 are provided at both upper and lower ends of the bolt 7. Are screwed together.
- a pressing and fixing portion 52 is constituted by the bolt 7 and the nuts 50 and 51.
- a bottomed central hole (axial gas flow path) 53 is opened to the extent that it reaches substantially the same position as the upper surface of the nut 51 at the bottom of the figure, and the center A plurality of lateral holes 55 are also formed in the hole 53 in the radial direction (left-right direction in the figure).
- the bolt 7 is penetrated by a through hole 57 opened in the vicinity of the outer periphery of the laminate 5 (in the stacking direction), and the outer peripheral surface of the bolt 7 and the inner peripheral surface of the through hole 57 are A space (outer peripheral side gas flow path) 59 serving as a cylindrical gas flow path is formed between them. Therefore, the internal gas flow path 56 is configured by the center hole 53 and the horizontal hole 55, and the gas flow path 60 in the through hole 57 is configured by the internal gas flow path 56 and the space 59.
- flange-shaped insulating spacers (insulating rings) 61, 63 made of alumina, for example, are externally fitted between the nuts 50, 51 and the laminate 5. Yes.
- the insulation spacers 61 and 63 are disposed between the nuts 50 and 51 and the laminated body 5 so that the gap between the bolt 7 and the laminated body 5 is maintained.
- the cylindrical portions 61b and 63b of the insulating spacers 61 and 63 are disposed between the bolt 7 and the laminated body 5, whereby the space 59 is maintained.
- a joint 65 is screwed onto the upper end of the bolt 7, and a gas pipe 67 for gas supply (or discharge) is attached to the joint 65! /.
- the external communication gas flow path 68 Since the upper end portion (external communication gas flow path 68) of the center hole 53 is in communication with the gas pipe 67, the external communication gas flow is from the inside of the gas pipe 67 to the space 59 in the through hole 57.
- the passage 68, the center hole 53, and the side hole 55 communicate with each other so that gas can be circulated.
- the air supplied from above the bolt 7 for air is introduced into the center hole 53 formed at the axial center of the bolt 7 and supplied to the space 59 from each lateral hole 55.
- the air supplied to the space 59 passes through the air introduction side cell communication portion 69 (see FIG. 4A) opened to the side of each solid electrolyte fuel cell 3. Then, it is introduced to the air flow path 31 side in the cell.
- the horizontal hole 55 and the space 59 are omitted because of the size of the drawing (the same applies hereinafter).
- the air in the air flow path 31 in the cell passes from the air discharge side cell communication path 71 (see Fig. 4A) to other air (not shown) through a lateral hole or space (not shown). It is discharged to the center hole 73 of the bolt 9 for discharging, and discharged from the top to the outside of the stack.
- the fuel gas supplied from above the fuel bolt 11 is introduced into a central hole 75 formed at the axial center of the Bonoret 11, and is supplied to the space from each lateral hole (not shown).
- the fuel gas supplied to the space passes through a fuel introduction side cell communication part 77 (see Fig. 4B) opened to the side of each solid oxide fuel cell 3 and the fuel flow path in the cell 23 Introduced on the side.
- an insulating frame 43 was manufactured by forming a green sheet containing alumina as a main component into a predetermined shape and firing it by a conventional method.
- the cell body 37 of the solid oxide fuel cell 3 was produced according to a conventional method. Specifically Printed the material of the solid electrolyte body 27 on the green sheet of the fuel electrode 25, printed the material of the air electrode 29 thereon, and then fired. The cell body 37 was fixed to the separator 45 by brazing.
- bolts 7 to 13 for air and fuel were manufactured by the following procedure.
- a round rod 83 made of SUS430 with a diameter of 15mm x length of 120mm (for example, a bolt 7 for air) is subjected to a saddle processing at the center of the axis.
- a center hole 53 having an inner diameter of 9 mm and a depth of 100 mm was formed (see FIG. 7B).
- hollow bolts 7 to 13 having a central hole 53 serving as a gas flow path are passed through the through holes 57 of the laminate 5 of the solid oxide fuel cells 3 and the boreholes 7 to Nuts 50 and 51 are screwed to 13 to press and fix the laminated body 5 of the solid oxide fuel cell 3.
- the force S can be increased by increasing the volumetric energy density and hence the gravimetric energy density.
- the extra space that does not contribute to power generation can be kept as small as possible, and the space necessary for ensuring the sealing performance can be set with a high degree of freedom, so the reliability is high.
- High performance solid oxide fuel cell stack 1 can be realized.
- the material of the bolts 7 to 13 so that the degree of thermal expansion (for example, thermal expansion coefficient) is smaller than the degree of thermal expansion (for example, thermal expansion coefficient) of the laminate 5 Even if the solid oxide fuel cell stack 1 becomes high temperature, the elongation of the bolts 7 to 13 is smaller than the elongation of the laminated body 5, and therefore, the pressing force is hardly reduced.
- a space 59 communicating with the gas flow path is formed between the Bonoleto 7 to; 13 and the laminated body 5 by the insulating spacers 61 and 63.
- the gas flow paths in the bolts 7 to 13 can be communicated with the gas flow paths in each solid electrolyte fuel cell 3. Therefore, it is possible to easily secure a path for the gas to flow in or out.
- Example 2 Next, the force to explain Example 2 The description of the same content as Example 1 is omitted.
- a groove serving as a gas flow path is provided outside the fixed member. Since the fixing member has the same structure as the force of the bolt for air and the bolt for fuel, here, a single bolt for air will be described as an example (in the following examples) the same)
- the bolt 101 for air is a long cylindrical bolt, and a connecting member (tip (lower end) is hexagonal) is connected to the upper end of the bolt 101. With nut 103 105) are screwed together.
- each groove 107 On the outer peripheral surface of the bolt 103, four grooves 107 are formed at intervals of 90 ° along the axial direction thereof. The upper end of each groove 107 communicates with a gas hole 109 penetrating the connecting member 105 in the axial direction. Further, the lower side of the groove 107 is formed inside the through hole 111 through which the bolt 101 penetrates, that is, between the outer peripheral surface of the bolt 101 and the inner peripheral surface of the through hole 111 passing through the laminated body 113 in the stacking direction. Communicate with the created space 115!
- the air supplied from the gas hole 109 of the connecting member 105 is introduced into the space 115 in the through-hole 111 via the groove 107 outside the bolt 101. .
- the groove 107 and the space 115 constitute a gas flow path 117 in the through hole 111.
- This embodiment also has the advantages that the same effects as those of the first embodiment can be obtained, and the groove 107 can be formed on the outer side of the bolt 101, so that the manufacture thereof is easy.
- a groove serving as a gas flow path is formed in the engaging member that engages with the fixing member.
- the air bolt 121 is a long cylindrical bolt, and a connection member (a nut 123 having a hexagonal tip at the tip) is provided at the upper end of the bolt 121. 125) is screwed together.
- a single groove 127 is formed along the axial direction thereof (a plurality of grooves may be formed).
- the upper end of the groove 127 communicates with the gas hole 129 of the connecting member 125, and the lower end of the through hole 131 through which the bolt 121 penetrates, that is, the through hole 131 that penetrates the outer peripheral surface of the bolt 121 and the laminate 133. It communicates with a space 135 formed between the inner peripheral surface.
- the air supplied from the gas hole 129 of the connecting member 125 Is introduced into the space 135 in the through hole 131 through the groove 127 inside the nut 123.
- This embodiment also has the advantage that the same effects as those of the first embodiment can be obtained, and the groove 127 can be formed on the inner side of the nut 123, so that the manufacture thereof is easy.
- a communication hole 137 that communicates with each other may be formed.
- Example 4 the force to explain Example 4 The description of the same content as Example 3 is omitted.
- the present embodiment is a further improvement of the third embodiment, in which a groove serving as a gas flow path is provided in the engaging member that engages with the fixing member, and a cylindrical body that is fitted around the fixing member is disposed.
- a cylinder 143 is disposed outside the bolt 141 for air.
- a cylindrical space 145 is provided between the bolt 141 and the cylinder 143, and a space 149 is also provided between the cylinder 143 and the inner peripheral surface of the through hole 147.
- a communication hole 151 that communicates the inner and outer spaces 145 and 149 is formed on the front end side (lower end side) of the cylinder 143.
- the air supplied from the gas hole 155 of the connection member 153 is introduced into the space 145 inside the cylinder 143 via the groove 159 inside the nut 157, Further, it is introduced into the space 149 outside the cylinder 143 through the communication hole 151 at the tip.
- the same effect as in the third embodiment is obtained, and the bolt 141 is externally fitted with the cylinder 143 having the communication hole 151 at the tip, so that the air to the tip side can be obtained.
- the supply can be sufficiently performed.
- the supply state of air can be adjusted by adjusting the number, position, and size of the communication holes 151.
- Example 5 the force to explain Example 5 The description of the same content as Example 1 is omitted.
- a plurality of members are connected in the axial direction to form a fixed member.
- the bolt 161 for air is a bolt that is elongated by connecting two members in the axial direction.
- the bolt 161 is equally connected between the center hole 163, which is the same as that of the first embodiment; It is a thing.
- This connection is not particularly limited as long as it is a force that is a connection between a male screw and a female screw, for example, both of them are male screws, nuts are separately arranged outside, and they are screwed together.
- the air supplied from the gas hole 173 of the connection member 171 passes through the gas hole 163 and the lateral hole 165 of the upper bolt 167 and enters the through hole 175.
- the gas L163 and the lateral hole 165 constitute an internal gas flow path 168 in the upper Bonole 167! /.
- This embodiment also achieves the same effects as those of the first embodiment, and shortens the bolt 161.
- the upper Bonoleto 167 and the lower Bonoleto 169 can be connected to each other, so that there is an advantage that the machining of the hole 163 is facilitated particularly in the upper Bonoleto 167.
- a sealing member such as a metal gasket may be disposed between the insulating spacer and the laminated body (opposed portion). This further improves the sealing performance.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK07744072.5T DK2023431T3 (en) | 2006-05-29 | 2007-05-24 | FIXED ELECTROLYT FUEL CELL STACK |
US12/159,284 US8501365B2 (en) | 2006-05-29 | 2007-05-24 | Solid electrolyte fuel cell stack |
CA2648655A CA2648655C (en) | 2006-05-29 | 2007-05-24 | Solid electrolyte fuel cell stack |
JP2008517889A JP5313667B2 (ja) | 2006-05-29 | 2007-05-24 | 固体電解質形燃料電池スタック |
EP07744072.5A EP2023431B1 (en) | 2006-05-29 | 2007-05-24 | Solid electrolyte fuel cell stack |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006148792 | 2006-05-29 | ||
JP2006-148792 | 2006-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007138984A1 true WO2007138984A1 (ja) | 2007-12-06 |
Family
ID=38778504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/060638 WO2007138984A1 (ja) | 2006-05-29 | 2007-05-24 | 固体電解質形燃料電池スタック |
Country Status (6)
Country | Link |
---|---|
US (1) | US8501365B2 (ja) |
EP (1) | EP2023431B1 (ja) |
JP (1) | JP5313667B2 (ja) |
CA (1) | CA2648655C (ja) |
DK (1) | DK2023431T3 (ja) |
WO (1) | WO2007138984A1 (ja) |
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WO2010067833A1 (ja) * | 2008-12-08 | 2010-06-17 | 日本碍子株式会社 | 電気化学装置 |
JP2010257779A (ja) * | 2009-04-24 | 2010-11-11 | Ngk Spark Plug Co Ltd | 固体酸化物形燃料電池 |
JP2010287501A (ja) * | 2009-06-12 | 2010-12-24 | Ngk Spark Plug Co Ltd | 燃料電池システム |
JP2011204512A (ja) * | 2010-03-26 | 2011-10-13 | Honda Motor Co Ltd | 燃料電池スタック |
JP2011258409A (ja) * | 2010-06-09 | 2011-12-22 | Nippon Telegr & Teleph Corp <Ntt> | 燃料電池スタック |
JP2016225078A (ja) * | 2015-05-28 | 2016-12-28 | 日本特殊陶業株式会社 | 燃料電池構造体 |
JP2017107663A (ja) * | 2015-12-07 | 2017-06-15 | 株式会社村田製作所 | 固体酸化物形燃料電池ユニット |
JP2017183225A (ja) * | 2016-03-31 | 2017-10-05 | 本田技研工業株式会社 | 燃料電池スタック |
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JP6123773B2 (ja) * | 2014-11-06 | 2017-05-10 | トヨタ自動車株式会社 | 燃料電池装置 |
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- 2007-05-24 CA CA2648655A patent/CA2648655C/en active Active
- 2007-05-24 WO PCT/JP2007/060638 patent/WO2007138984A1/ja active Application Filing
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US8043760B2 (en) | 2007-03-28 | 2011-10-25 | Ngk Insulators, Ltd. | Electrochemical cell stacks |
WO2008123570A1 (ja) * | 2007-03-28 | 2008-10-16 | Ngk Insulators, Ltd. | 電気化学装置 |
JP5313128B2 (ja) * | 2007-03-28 | 2013-10-09 | 日本碍子株式会社 | 電気化学装置 |
JP5417344B2 (ja) * | 2008-12-08 | 2014-02-12 | 日本碍子株式会社 | 電気化学装置 |
WO2010067833A1 (ja) * | 2008-12-08 | 2010-06-17 | 日本碍子株式会社 | 電気化学装置 |
JP2010257779A (ja) * | 2009-04-24 | 2010-11-11 | Ngk Spark Plug Co Ltd | 固体酸化物形燃料電池 |
JP2010287501A (ja) * | 2009-06-12 | 2010-12-24 | Ngk Spark Plug Co Ltd | 燃料電池システム |
JP2011204512A (ja) * | 2010-03-26 | 2011-10-13 | Honda Motor Co Ltd | 燃料電池スタック |
JP2011258409A (ja) * | 2010-06-09 | 2011-12-22 | Nippon Telegr & Teleph Corp <Ntt> | 燃料電池スタック |
JP2016225078A (ja) * | 2015-05-28 | 2016-12-28 | 日本特殊陶業株式会社 | 燃料電池構造体 |
JP2017107663A (ja) * | 2015-12-07 | 2017-06-15 | 株式会社村田製作所 | 固体酸化物形燃料電池ユニット |
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JP2020514538A (ja) * | 2017-01-02 | 2020-05-21 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Soec/sofc型固体酸化物を有するスタックの高温における気密な結合のためのシステム |
JP7189877B2 (ja) | 2017-01-02 | 2022-12-14 | コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ | Soec/sofc型固体酸化物を有するスタックの高温における気密な結合のためのシステム |
Also Published As
Publication number | Publication date |
---|---|
DK2023431T3 (en) | 2017-09-11 |
JPWO2007138984A1 (ja) | 2009-10-08 |
EP2023431A1 (en) | 2009-02-11 |
US8501365B2 (en) | 2013-08-06 |
JP5313667B2 (ja) | 2013-10-09 |
CA2648655C (en) | 2013-09-24 |
EP2023431A4 (en) | 2010-03-17 |
US20100055525A1 (en) | 2010-03-04 |
CA2648655A1 (en) | 2007-12-06 |
EP2023431B1 (en) | 2017-07-05 |
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