WO2005091419A1 - 燃料電池スタック用構成体、燃料電池スタック用構成体の製造方法、および燃料電池スタック - Google Patents
燃料電池スタック用構成体、燃料電池スタック用構成体の製造方法、および燃料電池スタック Download PDFInfo
- Publication number
- WO2005091419A1 WO2005091419A1 PCT/JP2005/002393 JP2005002393W WO2005091419A1 WO 2005091419 A1 WO2005091419 A1 WO 2005091419A1 JP 2005002393 W JP2005002393 W JP 2005002393W WO 2005091419 A1 WO2005091419 A1 WO 2005091419A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel cell
- cell stack
- laminate
- single cell
- components
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
-
- 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
-
- 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
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- Structure for fuel cell stack Structure for fuel cell stack, method of manufacturing structure for fuel cell stack, and fuel cell stack
- the present invention relates to a structure for a fuel cell stack, a method for manufacturing a structure for a fuel cell stack, and a fuel cell stack.
- a fuel cell stack is configured by laminating a large number of single cell components constituting a single cell.
- the single cell component includes a membrane electrode assembly in which a pair of electrodes are joined to a solid electrolyte membrane, and a pair of separators in which a flow channel for flowing a fluid is formed and which sandwiches the membrane electrode assembly.
- a fuel cell stack is formed by applying and bonding an adhesive with a large number of membrane electrode assemblies and a large number of separators, and curing the adhesive. I have.
- Patent Document 1 JP-A-7-249417
- Patent Document 2 Japanese Patent Application Laid-Open No. 2001-85030
- the present invention has been made to solve the problems associated with the above conventional technology, and is capable of contributing to an improvement in the productivity of the fuel cell stack. It is an object of the present invention to provide a method of manufacturing a structure for use and a fuel cell stack.
- a single cell including a membrane / electrode assembly in which a pair of electrodes are joined to a solid electrolyte membrane, and a pair of separators for forming a flow channel for flowing a fluid and sandwiching the membrane / electrode assembly
- At least one set of components The at least one set of single-cell components is provided so as to wrap around the entire outer periphery of a laminate formed by stacking the single-cell components to form a single cell, and the single-cell components are sandwiched without using an adhesive. Including pinching means,
- the holding means is a structure for a fuel cell stack, further comprising a sealing portion for sealing leakage of the fluid.
- a single cell including a membrane electrode assembly in which a pair of electrodes are joined to a solid electrolyte membrane, and a pair of separators for forming a flow channel for flowing a fluid and sandwiching the membrane electrode assembly At least one set of components is laminated in a mold so as to constitute a single cell,
- a resin molding material is resin-molded over the entire outer periphery of the laminate to envelop the entire outer periphery of the laminate.
- Forming clamping means provided as follows,
- a method for manufacturing a structure for a fuel cell stack wherein the single cell component is held by the holding means without using an adhesive, and further, leakage of the fluid is sealed.
- FIG. 1 is a front view showing a fuel cell stack according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing the structure for a fuel cell stack shown in FIG. 1.
- FIG. 3 is an enlarged cross-sectional view showing a main part of the fuel cell stack structure shown in FIG. 2.
- FIG. 4 is a cross-sectional view showing a molding device for manufacturing a fuel cell stack component.
- FIG. 1 is a front view showing a fuel cell stack 10 according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view showing the fuel cell stack assembly 20 shown in FIG. 1
- FIG. 3 is an enlarged cross-sectional view showing a main part of a fuel cell stack component 20 shown in FIG. Below, the fuel cell
- the stack component 20 is also simply referred to as a stack component 20.
- fuel cell stack 10 is formed by stacking a plurality of stack members 20 via seal members 11.
- the seal member 11 has no function of bonding the stack members 20 together.
- an O-ring or a sealant to be applied can be suitably used.
- the stacked stack structure 20 is fastened by upper and lower end plates 13 and 14 connected via tie rod bolts 12.
- the illustrated stack structure 20 includes two sets of single cell components 30.
- a set of single cell components 30 is composed of a membrane / electrode assembly 40 in which a pair of electrodes 42 and 43 are joined to a solid polymer electrolyte membrane 41 (corresponding to a solid electrolyte membrane), and a flow path for flowing a fluid.
- Grooves 53-55 are formed and include a pair of separators 51, 52 for sandwiching the membrane electrode assembly 40.
- the solid polymer electrolyte membrane 41 of the membrane electrode assembly 40 is a polymer membrane having a function of moving hydrogen ions.
- a pair of gas diffusion layers functioning as electrodes 42 and 43 are joined to both surfaces of the solid polymer electrolyte membrane 41 by a hot press method.
- the membrane / electrode assembly 40 further includes a pair of frames 44 and 45 sandwiching the outer edge of the solid polymer electrolyte membrane 41.
- the frames 44 and 45 are used to enhance the handleability of the membrane electrode assembly 40.
- the frames 44 and 45 are formed from a resin material, and are attached to the solid polymer electrolyte membrane 41 via a double-sided tape 46 (see FIG. 3).
- a flow channel 53 for flowing a fuel gas (hydrogen) is formed in the separator 52 on the electrode 43 side.
- a flow groove 54 for flowing an oxidizing gas (air) and a flow groove 55 for flowing cooling water are formed in the separator 52 on the electrode 43 side.
- the shape and arrangement of the flow grooves 53-55 have a fine and complicated structure because it is necessary to consider gas diffusivity, pressure loss, discharge of generated water, cooling performance, and the like.
- the separators 51 and 52 are manufactured so as to have recesses forming the flow grooves 53 to 55 by pressing a powdery molding material in which graphite and resin are mixed with a molding die.
- a groove 56 for disposing the seal member 11 is formed in the uppermost separator 51 of the stack structure 20.
- the seal members 11 flow through the flow grooves 55 in the upper stack member 20. Prevent leakage of cooling water passing through.
- the stack structure 20 includes a holding means (casing) 60 for holding the two sets of single cell components 30 without using an adhesive.
- the sandwiching means 60 is provided so as to surround the entire outer periphery of the laminated body 31 formed by laminating two sets of the single cell components 30 to form two single cells.
- the holding means 60 is further provided with a seal portion 61 for sealing leakage of the fluid.
- the seal portion 61 is located between the frame 44 and the separator 51 of the membrane electrode assembly 40, between the frame 45 and the separator 52, and between the separator 51 and the separator 52.
- the holding means 60 is formed by molding a resin material made of a resin into a resin mold over the entire outer periphery of the laminate 31.
- the resin used for the molding material is not particularly limited.
- a thermosetting resin such as a one-component heat-curable resin type resin can be used.
- the resin mold forming of the holding means 60 will be described later, but the holding means 60 is formed by pressure-filling the cavity in the mold with a one-component heat-curable resin type resin.
- An upper locking piece 62 for locking to the uppermost separator 51 is formed at the upper end of the holding means 60, and a lower locking piece 63 for locking to the lowermost separator 52 is formed at the lower end of the holding means 60. Is formed.
- the holding means 60 is a casing that surrounds the entire outer periphery of the stacked body 31 and holds the stacked body 31.
- the seal portion 61 of the holding means 60 has a surface 61a for increasing the contact area with the laminate 31. Specifically, a portion where the boundary between the frames 44 and 45 and the separators 51 and 52 faces the outer periphery of the laminate 31 and a portion where the boundary between the separators 51 and 52 faces the outer periphery of the laminate 31. A concave portion 32 having a triangular cross section which is chamfered and into which the resin bites is formed in the laminate 31. The contact area between the laminated body 31 and the sealing portion 61 is increased by the amount of the chamfering, as compared with the case of not chamfering.
- the clamping means 60 In the strong stack structure 20, two sets of single cell components 30 that do not use an adhesive are sandwiched by the clamping means 60! Compared to the configuration in which the single cell component 30 is assembled with an adhesive, the work time for applying the adhesive and drying the adhesive is not required, so that it is necessary to assemble the two sets of the single cell component 30. Short working time Can shrink. Therefore, the productivity of the fuel cell stack 10 is improved. Further, the flow of force between the frame 44 of the membrane electrode assembly 40 and the separator 51, between the frame 45 and the separator 52, and between the separator 51 and the separator 52 is achieved by the sealing portion 61 of the sandwiching means 60. Leakage of the body is prevented and the performance of each single cell is maintained.
- the holding means 60 is formed by resin molding, the holding means 60 can be easily formed over the entire outer periphery of the laminated body 31. Further, since the two sets of single cell components 30 are integrally held, the work time can be reduced as compared with a mode in which the single cell components 30 are assembled with an adhesive. Therefore, the productivity of the fuel cell stack 10 is improved.
- the holding means 60 is made of resin and has a certain degree of elasticity. As in the embodiment, when the seal portion 61 is formed to bite into the laminate 31, the seal portion 61 also has a function of absorbing vibration acting on the laminate 31 and deformation due to thermal expansion. From this viewpoint, the sealing performance is also improved.
- the fuel cell stack 10 is formed by stacking a plurality of stack members 20 with a seal member 11 interposed therebetween. Since the stack members 20 are not bonded to each other, the fuel cell stack 10 can be easily disassembled into individual stack members 20. Therefore, when a failure occurs in any one of the single cells, only the stack member 20 including the single cell can be replaced with a new V and the stack member 20. Since the stack component 20 can be replaced in units of blocks, the replacement operation can be performed more quickly than a fuel cell stack assembled while bonding the single cell components 30 using an adhesive. The waste of the single cell component 30 is reduced. In addition, the sealing member 11 exhibits a function of absorbing vibration acting on the fuel cell stack 10 and deformation of the entire fuel cell stack 10, and the performance of the fuel cell stack 10 is maintained.
- FIG. 4 is a cross-sectional view showing a forming apparatus 70 for manufacturing the fuel cell stack component 20.
- the molding device 70 includes a molding die 71 on which two sets of single cell components 30 are stacked, and a molding die 71 A filling device (not shown) for filling the cavity 71a formed therein with a molding material 78 made of resin by pressure.
- a one-component heat-curable resin type resin is used as the molding material 78.
- the molding die 71 includes a lower die 72, an extrusion plate 73 movably provided in the lower die 72, and an upper die 74 movably provided in the lower die 72.
- the lower mold 72 is provided with a heating means 75 for heating the lower mold 72 to cure the molding material 78, and a cooling means 76 for cooling the lower mold 72.
- the heating means 75 also has, for example, an electric heater power.
- the cooling means 76 is composed of a passage through which a cooling medium such as water flows.
- the two sets of single cell components 30 are stacked on an extrusion plate 73 in a lower mold 72.
- the upper mold 74 applies a pressing force to the laminate 31 laminated in the molding die 71 in the laminating direction to the laminate 31.
- a cavity 71a is formed between the outer periphery of the laminate 31 and the inner surface of the molding die 71.
- a pin 77 that is driven upward is connected to the extrusion plate 73 so as to also lift the formed stack structure 20 by the
- the stack structure 20 When manufacturing the stack structure 20, first, two sets of single cell components 30 are stacked on an extrusion plate 73 so as to form a single cell. That is, the separator 52, the membrane / electrode assembly 40, the separator 51, the separator 52, the membrane / electrode assembly 40, and the separator 51 are laminated on the extrusion plate 73 in this order. The portions where the boundary surfaces between the frames 44 and 45 and the separators 51 and 52 face the outer periphery of the laminate 31 and the portions where the boundary surfaces between the separators 51 and 52 face the outer periphery of the laminate 31 are chamfered in advance. By stacking the single cell components 30, a concave portion 32 having a triangular cross section is formed in the stacked body 31.
- the upper mold 74 is driven toward the lower mold 72, and the laminate 31 is pressed in the laminating direction to bring the membrane electrode assembly 40 and the separators 51 and 52 into close contact.
- the molding material 78 is pressure-fed and filled into the cavity 71a from the filling device.
- the heating means 75 is operated, the lower mold 72 is heated to a predetermined temperature, and the molding material 78 is hardened.
- the laminate 31 is resin-molded over the entire outer periphery, and the holding means 60 provided so as to surround the entire outer periphery of the laminate 31 is formed.
- the sealing portion 61 of the holding means 60 is formed so as to bite into the concave portion 32 of the laminated body 31.
- the resin-molded holding means 60 holds the single cell component 30 without using an adhesive, and further seals leakage of fluid. Get body 20.
- the sealing portion 61 of the holding means 60 can have an appropriate shape.
- a convex portion that bites into the holding means 60 may be formed in the laminate 31. Even with a strong form, a surface for increasing the contact area with the laminate 31 is formed in the seal portion, so that leakage of the fluid can be more reliably prevented. Further, both the concave portion 32 and the convex portion may be formed in the laminate 31!
- the purpose of the present invention to improve the productivity of the fuel cell stack 10 described with respect to the stack assembly 20 including two sets of single cell components 30 includes one set of single cell components 30. This can also be achieved by a stack structure 20 or a stack structure 20 including three or more sets of single cell components 30.
- the present invention can be applied to a membrane electrode assembly that does not include the force frames 44 and 45 described for the membrane electrode assembly 40 including the pair of frames 44 and 45.
- the single cell components are held by the holding means without using an adhesive.
- the work time for applying the adhesive and drying the adhesive is not required as compared with the configuration in which the single-cell components are assembled with adhesive, so the work time for assembling the single-cell components can be reduced. . Therefore, the productivity of the fuel cell stack is improved.
- the sealing portion of the holding means prevents leakage of the fluid and maintains the performance of each unit cell.
- the holding means is formed by resin molding, the holding means is provided over the entire outer periphery of the laminate. It can be easily formed.
- the working time can be reduced as compared with a mode in which the component parts are assembled with an adhesive.
- the fuel cell stack members are bonded to each other, so that the fuel cell stack can be easily disassembled into individual fuel cell stack members. Can be. If any single cell becomes defective, it can be replaced in blocks with the fuel cell stack assembly, so the fuel cell assembled while bonding the single cell components with an adhesive Replacement work can be performed faster than a stack.
- the present invention can be applied to uses for manufacturing a structure for a fuel cell stack.
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Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004-084687 | 2004-03-23 | ||
JP2004084687A JP2005276482A (ja) | 2004-03-23 | 2004-03-23 | 燃料電池スタック用構成体、燃料電池スタック用構成体の製造方法、および燃料電池スタック |
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WO2005091419A1 true WO2005091419A1 (ja) | 2005-09-29 |
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PCT/JP2005/002393 WO2005091419A1 (ja) | 2004-03-23 | 2005-02-17 | 燃料電池スタック用構成体、燃料電池スタック用構成体の製造方法、および燃料電池スタック |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018055858A1 (ja) * | 2016-09-21 | 2018-03-29 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5028856B2 (ja) * | 2006-04-27 | 2012-09-19 | トヨタ自動車株式会社 | 燃料電池 |
CA2694279C (en) * | 2007-06-28 | 2017-01-10 | Protonex Technology Corporation | Fuel cell stacks and methods |
JP5181969B2 (ja) * | 2008-09-25 | 2013-04-10 | トヨタ自動車株式会社 | 燃料電池 |
JP2010113890A (ja) * | 2008-11-05 | 2010-05-20 | Toyota Motor Corp | 燃料電池の製造方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000067886A (ja) * | 1998-08-20 | 2000-03-03 | Matsushita Electric Ind Co Ltd | 固体高分子型燃料電池およびその製造法 |
JP2000299121A (ja) * | 1999-04-16 | 2000-10-24 | Mitsubishi Heavy Ind Ltd | 燃料電池スタック |
JP2001135342A (ja) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | 高分子電解質型燃料電池 |
-
2004
- 2004-03-23 JP JP2004084687A patent/JP2005276482A/ja active Pending
-
2005
- 2005-02-17 WO PCT/JP2005/002393 patent/WO2005091419A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000067886A (ja) * | 1998-08-20 | 2000-03-03 | Matsushita Electric Ind Co Ltd | 固体高分子型燃料電池およびその製造法 |
JP2000299121A (ja) * | 1999-04-16 | 2000-10-24 | Mitsubishi Heavy Ind Ltd | 燃料電池スタック |
JP2001135342A (ja) * | 1999-11-02 | 2001-05-18 | Matsushita Electric Ind Co Ltd | 高分子電解質型燃料電池 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018055858A1 (ja) * | 2016-09-21 | 2018-03-29 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
JPWO2018055858A1 (ja) * | 2016-09-21 | 2019-06-24 | 株式会社豊田自動織機 | 蓄電装置及び蓄電装置の製造方法 |
US11276903B2 (en) | 2016-09-21 | 2022-03-15 | Kabushiki Kaisha Toyota Kidoshokki | Electricity storage device and method for manufacturing electricity storage device |
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JP2005276482A (ja) | 2005-10-06 |
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