WO2014188807A1 - 燃料電池用セパレータの製造方法及び製造装置 - Google Patents
燃料電池用セパレータの製造方法及び製造装置 Download PDFInfo
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- WO2014188807A1 WO2014188807A1 PCT/JP2014/060306 JP2014060306W WO2014188807A1 WO 2014188807 A1 WO2014188807 A1 WO 2014188807A1 JP 2014060306 W JP2014060306 W JP 2014060306W WO 2014188807 A1 WO2014188807 A1 WO 2014188807A1
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- separator
- elastic member
- fuel cell
- assembly
- positioning
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Definitions
- the present invention relates to a method and apparatus for manufacturing a separator assembly used in a fuel cell formed by stacking fuel cells.
- a fuel cell has a number of fuel cell cells each having a so-called membrane electrode assembly (hereinafter referred to as MEMBRANE ELECTRODE ASSEMBLY, hereinafter referred to as MEA) in which anode and cathode electrodes are bonded to both surfaces of an electrolyte membrane, and sandwiched between both surfaces by a corrugated separator. About 100 cells are stacked. In order to achieve a desired output, a fuel cell generally has a plurality of fuel cells stacked. Since the stacking mode affects power generation characteristics, research on positioning of each component during stacking is earnest. Has been done.
- adjacent separators in adjacent fuel cells are energized when the corrugated shapes of the separators contact each other, but the corrugated shapes cannot be sufficiently contacted due to variation in shape, and are generated by the fuel cells.
- a so-called spring-like member may be provided between adjacent separators to absorb the variation in the shape of the separators and suppress an increase in electrical resistance.
- the separator is formed with a through-hole for circulating fuel, oxidant, and cooling fluid outside the corrugated shape. Therefore, in order to provide a through-hole for positioning in the separator, it is necessary to prevent the shape of the through-hole of fuel or the like from connecting even if there is a variation, and if you try to satisfy this, it will be more outward than the through-hole. A through hole will be provided in the case, and the outer shape of the separator must be expanded.
- the spring member functions as long as it has an area that can be in contact with the corrugated shape when laminated, but when positioning by providing a through hole at a corner of a component as in Patent Document 1, Since the outer shape of the spring member is different from that of the spring member, the shape of the spring member must be expanded so that the outer shape is the same as that of the separator. In this case, there is a problem in that the component cost is increased.
- the present invention has been made to solve the above-described problems, and the separator and the spring member are highly accurate even if the separator is not expanded for alignment or the outer shape of the spring member is not the same as that of the separator. It is an object of the present invention to provide a method and apparatus for manufacturing a separator assembly for a fuel cell that can be aligned with each other.
- the present invention for achieving the above object is a method for producing a separator assembly for a fuel cell, which is provided adjacent to a membrane electrode assembly and forms a flow path for flowing a fluid.
- the manufacturing method is smaller than a first separator having a concavo-convex shape in a cross-sectional shape, a second separator having a concavo-convex shape in a cross-sectional shape, and an outer shape in plan view when the first separator and the second separator are viewed from the surface direction. It has an outer shape, and has conductivity to maintain contact between the convex portion of the first separator and the convex portion of the second separator, which are arranged between the first separator and the second separator, and is opposed to each other by elastic deformation.
- An elastic member is prepared (preparation process). Then, the first positioning member provided on the placement surface is brought into contact with the elastic member, thereby positioning the elastic member and placing it on the placement surface (first placement step). Then, the first separator is positioned with respect to the elastic member by bringing the second positioning member provided in an area outside the area where the first positioning member is provided on the mounting surface into contact with the first separator. And placed on the elastic member (second placing step). And the elastic member and the 1st separator which were positioned and overlapped are joined (joining process).
- the second placement step is characterized in that the first separator is overlapped with the elastic member while the first positioning member for positioning the elastic member is retracted from the placement surface.
- the manufacturing apparatus includes a mounting portion on which the elastic member, the first separator, and the second separator are mounted, and a first surface that is provided on the mounting surface of the mounting portion and positions the elastic member by contacting the elastic member.
- the elastic member positioned by the positioning member and the second positioning member and a joint portion for joining the first separator.
- the first positioning member can be retracted from the placement surface.
- FIG. 4A is a plan view showing a state where the elastic member is positioned on the mounting table
- FIG. 4B is a plan view showing a state where the separator is positioned on the mounting table.
- FIG. 4 (B) shows the joining position of the separator and elastic member which are joined with the elastic member, and the joining position of the separators which make a pair.
- 6 (A) to 6 (C) are cross-sectional views taken along line 6-6 of FIG. 4 (B), and are explanatory views showing a state in which a separator assembly is formed. It is a perspective view shown about the lamination process which laminates
- FIG. 1 is a time chart showing a method for manufacturing a fuel cell separator assembly according to an embodiment of the present invention
- FIG. 2 is a schematic plan view of an apparatus for forming a separator assembly constituting the fuel cell according to the embodiment.
- 3 is a perspective view showing a mounting table for aligning the separator and the elastic member according to the embodiment
- FIG. 4A is a plan view showing a state in which the elastic member is positioned on the mounting table
- FIG. 5 is a plan view showing a state in which the separator is positioned on the mounting table.
- FIG. 5 is a plan view of a separator constituting the fuel cell, and is a plan view showing a joining position between the separator and the elastic member joined to the elastic member and a joining position between the paired separators.
- FIGS. 6A to 6C are cross-sectional views taken along line 6-6 in FIG. 4 and are explanatory views showing a state in which a separator assembly is formed.
- FIG. 7 is a perspective view showing a stacking process for stacking the components of the fuel cell.
- FIG. 8 is a perspective view showing the fuel cell according to the embodiment
- FIG. 9 is an exploded perspective view showing the configuration of the fuel cell
- FIG. 10 is an exploded perspective view showing a part of the configuration of the fuel cell
- FIG. 11 is the embodiment. It is a perspective view which shows the separator assembly for fuel cells which concerns on.
- FIG. 12 is a cross-sectional view showing a separator assembly and a membrane electrode assembly according to the embodiment
- FIG. 13 is a perspective view showing a part of an elastic member constituting the separator assembly according to the embodiment.
- an elastic member 30 is further disposed between the anode separator 13 and the cathode separator 14 that are disposed adjacent to the membrane electrode assembly 11, and the separator 13 and the separator 14. Are joined.
- the manufacturing method of the separator assembly 12 includes a preparation process (step ST10), a first placement process (step ST20), a second placement process (step ST30), and a first joining process (joining).
- Step ST40) corresponding to the process and a second joining step (corresponding to other joining step, Step ST50).
- a fuel cell manufacturing method is obtained. Details will be described later.
- the fuel cell 100 has a stacked body 10 in which a plurality of fuel cells 10a are stacked as a main component.
- the fuel cell 10 a is configured by arranging separators 13 and 14 on both sides of the membrane electrode assembly 11.
- an anode 11b is joined to one side of the electrolyte membrane 11a, and a cathode 11c is joined to the other side.
- the separator assembly 12 includes two separators 13 and 14, and an elastic member 30 that contacts the corrugated shapes 13 g and 14 g of the separators 13 and 14 between the separators 13 and 14.
- current collector plates 16 and 17 are provided at both ends in the stacking direction of the stacked body 10.
- the fuel cell 100 has a housing 20.
- the housing 20 includes a pair of fastening plates 21 and 22, reinforcing plates 23 and 24, and end plates 25 and 26 (corresponding to end members).
- end plates 25 and 26 corresponding to end members
- the separators 13 and 14 as shown in FIGS. 9 to 12, energize the electric power generated in the membrane electrode assembly 11 while isolating adjacent membrane electrode assemblies 11 in the plurality of stacked fuel cells 10 a. .
- the separators 13 and 14 are classified into an anode side separator 13 (corresponding to a first separator) and a cathode side separator 14 (corresponding to a second separator).
- the anode side separator 13 is in contact with the anode 11 b of the membrane electrode assembly 11.
- the anode side separator 13 is made of a metal having a conductive material, and is formed in a thin plate shape larger than the anode 11b.
- a corrugated shape having a plurality of concave and convex sections so as to form a flow path for separating a fuel gas (hydrogen) and a cooling fluid such as cooling water. 13g is provided in the corrugated shape 13g of the anode side separator 13, the closed space formed in contact with the anode 11b is used as an anode gas flow path 13h for supplying hydrogen to the anode 11b.
- the closed space formed between the corrugated shape 13g of the anode-side separator 13 and the corrugated shape 14g of the cathode-side separator 14 via the elastic member 30 is used as a cooling fluid channel 13j for supplying cooling water.
- the anode separator 13 has a rectangular shape, and has a through hole corresponding to the cathode gas supply port 13a, the cooling fluid supply port 13b, and the anode gas supply port 13c at one end in the longitudinal direction thereof. Similarly, the anode-side separator 13 has a through hole corresponding to the anode gas discharge port 13d, the cooling fluid discharge port 13e, and the cathode gas discharge port 13f at the other end in the longitudinal direction.
- the cathode separator 14 is in contact with the cathode 11 c of the membrane electrode assembly 11.
- the cathode side separator 14 is made of a metal having a conductive material, and is formed in a thin plate shape larger than the cathode 11c.
- the cathode-side separator 14 has a plurality of concave and convex sections in cross section so as to form a flow path that separates the oxidant gas (air containing oxygen or pure oxygen) and cooling water.
- the waveform shape 14g which consists of a shape is provided.
- the closed space formed in contact with the cathode 11c is used as a cathode gas flow path 14h for supplying an oxidant gas to the cathode 11c.
- the closed space formed between the corrugated shape 14g of the cathode-side separator 14 and the corrugated shape 13g of the anode-side separator 13 via the elastic member 30 is used as a cooling fluid channel 14j for supplying cooling water.
- the elastic member 30 is formed by raising a part of a single steel plate or the like as an upstanding piece 32, and the parts raised from the steel plate are connected to both side surfaces of the base 31. Has been. Therefore, in the adjacent fuel cell 10a, the cooling fluid channel 13j of the anode separator 13 of one fuel cell 10a and the cooling fluid channel 14j provided in the cathode separator 14 of another fuel cell 10a are: A flow path for the cooling fluid connected to one is formed.
- the cathode side separator 14 has a rectangular shape, and has a through hole corresponding to the cathode gas supply port 14a, the cooling fluid supply port 14b, and the anode gas supply port 14c at one end in the longitudinal direction. Similarly, the cathode separator 14 has a through hole corresponding to the anode gas discharge port 14d, the cooling fluid discharge port 14e, and the cathode gas discharge port 14f at the other end in the longitudinal direction.
- Cathode gas supply ports 13a and 14a, cooling fluid supply ports 13b and 14b, anode gas supply ports 13c and 14c, anode gas discharge ports 13d and 14d, cooling fluid discharge ports 13e and 14e, and cathode gas discharge ports 13f and 14f are fuels. It corresponds to a separator circulation hole for circulating an oxidizing agent or a cooling fluid.
- the cooling fluid supply ports 13b and 14b and the cooling fluid discharge ports 13e and 14e are used as shapes that allow the positioning member to be inserted when positioning with the elastic member 30 described later.
- the cooling fluid supply ports 13b and 14b and the cooling fluid discharge ports 13e and 14e for alignment with the elastic member 30, the position with respect to the elastic member 30 can be obtained without providing a shape dedicated for alignment. Can be combined.
- the elastic member 30 is deformed by itself as shown in FIG. 11 to FIG. 13 to vary the wavy shape of the flow path between the fuel gas and the cooling water in the anode side separator 13 and the cathode side separator 14 when the fuel cell 100 is assembled. Absorb. Further, the elastic member 30 expands by absorbing the displacement in the stacking direction caused by the thermal expansion of the separators 13 and 14 and the medium supplied with the membrane electrode assembly 11 during the operation of the fuel cell 100. The displacement in the stacking direction caused by the deformation is deformed and absorbed by itself. Accordingly, the stacked fuel battery cells 10a can be brought into close contact with each other by applying a high pressure. As the plurality of stacked fuel battery cells 10a are in close contact with each other, it is possible to suppress an increase in the conduction resistance between the fuel battery cells 10a and improve the power generation efficiency.
- the elastic member 30 is made of a metal having electrical conductivity and is formed in a thin plate shape.
- the elastic member 30 is disposed between the anode-side separator 13 and the cathode-side separator 14, and has a plurality of uprights provided in a lattice shape from a thin plate-like base material 31 and a base surface 31 a of the base material 31. And a piece 32. That is, the elastic member 30 is formed in a lattice shape with standing pieces 32 raised so as to form a cantilever after being punched into a U shape from a base material 31 corresponding to one thin plate.
- FIG. 13 illustrates a part of the elastic member 30 shown in FIGS. 11 and 3 in order to express the configuration of the elastic member 30 in an easy-to-understand manner.
- the standing piece 32 is, for example, in the width X of the fixed end portion 32 a on the proximal end side of the standing piece 32 provided on the base surface 31 a of the base material 31 and in one direction X ⁇ b> 1 from the fixed end portion 32 a. It is formed in a rectangular shape having the same width as that of the free end portion 32b on the front end side extending along the same.
- the plurality of standing pieces 32 are formed, for example, in a plurality of rows along the other direction Y1 intersecting with the one direction X1 so that the directions of the free ends 32b are aligned. As shown in FIG.
- the upright piece 32 has a free end portion 32 b on the distal end side extended from a fixed end portion 32 a on the proximal end side of the upright piece 32 provided on the base surface 31 a of the base material 31. It is made to contact
- the membrane electrode assembly 11 shown in FIG. 12 generates electric power by chemically reacting the supplied oxygen and hydrogen.
- the membrane electrode assembly 11 is formed by joining the anode 11b to one side of the electrolyte membrane 11a and joining the cathode 11c to the other side.
- the membrane electrode assembly 11 is generally referred to as MEA (membrane electrode assembly).
- the electrolyte membrane 11a is made of, for example, a solid polymer material and is formed in a thin plate shape.
- the solid polymer material for example, a fluorine-based resin that conducts hydrogen ions and has good electrical conductivity in a wet state is used.
- the anode 11b is formed by laminating an electrode catalyst layer, a water repellent layer, and a gas diffusion layer, and is formed in a thin plate shape slightly smaller than the electrolyte membrane 11a.
- the cathode 11c is formed by laminating an electrode catalyst layer, a water repellent layer, and a gas diffusion layer, and is formed in a thin plate shape with the same size as the anode 11b.
- the electrode catalyst layers of the anode 11b and the cathode 11c include an electrode catalyst in which a catalyst component is supported on a conductive carrier and a polymer electrolyte.
- the gas diffusion layers of the anode 11b and the cathode 11c are formed of, for example, carbon cloth, carbon paper, or carbon felt woven with yarns made of carbon fibers having sufficient gas diffusibility and conductivity.
- the MEA 11 includes a frame member 15.
- the frame member 15 integrally holds the outer periphery of the laminated electrolyte membrane 11a, anode 11b, and cathode 11c.
- the frame member 15 is made of, for example, a resin having electrical insulation, and has an outer shape similar to the outer shape of the outer peripheral portions of the separators 13 and 14.
- the frame member 15 has a through hole corresponding to the cathode gas supply port 15a, the cooling fluid supply port 15b, and the anode gas supply port 15c at one end in the longitudinal direction.
- the frame member 15 has through holes corresponding to the anode gas discharge port 15d, the cooling fluid discharge port 15e, and the cathode gas discharge port 15f at the other end in the longitudinal direction.
- the gap between the separator 13 and the MEA 11 and the gap between the separator 14 and the MEA 11 are sealed by applying a sealing member on the outer periphery.
- a thermosetting resin is used as the sealing member.
- the thermosetting resin is selected from, for example, phenol resin, epoxy resin, unsaturated polyester, and the like.
- an elastic member 30 is disposed between the separator 13 and the separator 14 adjacent to each other in the stacked fuel battery cells 10a, and the outer periphery of the separators 13 and 14 is sealed by welding. However, it can also be sealed with a sealing member as described above.
- the pair of current collecting plates 16 and 17 are shown in FIGS. 9 and 10 and take out the electric power generated by the fuel cell 10a to the outside.
- the pair of current collecting plates 16 and 17 are respectively disposed at both ends of the stacked body 10 in which a plurality of fuel battery cells 10a are stacked.
- the outer shape of the pair of current collector plates 16 and 17 is the same as the outer shape of the MEA 11 with a slightly increased layer thickness, except for some shapes.
- the pair of current collector plates 16 and 17 have through holes corresponding to the cathode gas supply ports 16a and 17a, the cooling fluid supply ports 16b and 17b, and the anode gas supply ports 16c and 17c at one end in the longitudinal direction. Yes.
- the pair of current collecting plates 16 and 17 includes a current collecting portion 16h and the like at the center thereof.
- the current collecting portions 16h of the pair of current collecting plates 16 and 17 are made of, for example, a conductive member such as dense carbon that does not allow gas permeation, and are formed in a thin plate shape slightly smaller than the outer shapes of the anode 11b and the cathode 11c. ing.
- the pair of current collectors 16h and the like are in contact with the anode 11b or the cathode 11c of the MEA 11 provided in the outermost fuel cell 10a that is stacked.
- the current collector 16h and the like are provided with a cylindrical protrusion 16g and the like having conductivity from one surface thereof.
- the protrusions 16g and the like face the outside through the through holes 25g and the like of a pair of end plates 25 and 26 of the casing 20 described later.
- the shape of the current collector plate 16 corresponding to the protruding portion 16g is similarly provided for the current collector plate 17.
- the casing 20 holds a plurality of stacked fuel battery cells 10a and a pair of current collector plates 16 and 17 in close contact with each other.
- the housing 20 includes the pair of fastening plates 21 and 22, the pair of reinforcing plates 23 and 24, the pair of end plates 25 and 26, and the screws 27 as described above.
- the pair of end plates 25 and 26 sandwich and urge a pair of current collecting plates 16 and 17 disposed at both ends of the stacked fuel battery cells 10a.
- the outer shape of the pair of end plates 25 and 26 is the same as the outer shape of the MEA 11 with an increased layer thickness, except for some shapes.
- the pair of end plates 25 and 26 are made of, for example, metal, and an insulator is provided at a portion that contacts the pair of current collector plates 16 and 17.
- the pair of end plates 25, 26 have through holes corresponding to cathode gas supply ports 25 a, 26 a, cooling fluid supply ports 25 b, 26 b, and anode gas supply ports 25 c, 26 c at one end in the longitudinal direction. .
- through holes corresponding to the anode gas discharge ports 25d and 26d, the cooling fluid discharge ports 25e and 26e, and the cathode gas discharge ports 25f and 26f are opened at the other end in the longitudinal direction.
- the pair of end plates 25 and 26 have through holes 25g and 26g through which the protrusions 16g and the like of the pair of current collector plates 16 and 17 described above are inserted.
- the pair of fastening plates 21 and 22 are made of, for example, metal and are formed in a plate shape.
- the pair of fastening plates 21 and 22 are formed with part of their edges raised, and contact the surfaces of the pair of end plates 25 and 26 when assembled. Moreover, the surface which contacts the end plates 25 and 26 in the fastening plates 21 and 22 is provided with holes through which the screws 27 are inserted. By tightening the screws 27 attached to the holes, the end plates 25 and 26 and the current collectors are collected.
- the plates 16 and 17 and the laminated body 10 are pressed in the laminating direction.
- the pair of reinforcing plates 23 and 24 are made of, for example, metal and are formed in a plate shape that is longer than the pair of fastening plates 21 and 22.
- the pair of reinforcing plates 23 and 24 are formed by raising a part of the end in the longitudinal direction, and a hole through which the screw 27 is inserted is provided in the part. The holes are formed so that the screws 27 pass through in the stacking direction.
- the body 10 is pressurized in the stacking direction.
- the pair of fastening plates 21 and 22 and the pair of reinforcing plates 23 and 24 fasten the screws 27 so that the end plates 25 and 26, the current collector plates 16 and 17, and the stacked body 10 are stacked in the stacking direction. Pressurized.
- FIG. 7 is a perspective view showing a stacking process for stacking components constituting the fuel cell.
- the separators 13 and 14, the frame member 15, the current collecting plates 16 and 17, the cooling fluid supply ports 13b to 17b, 25b and 26b of the end plates 25 and 26, and the cooling fluid discharge ports 13e to 17e, 25e and 26e are fuel.
- the battery cell 10a, the current collector plates 16 and 17, and the end plates 25 and 26 are used as a shape for aligning each component when laminating.
- An outline of the stacking apparatus 300 used in the stacking process is as follows. In the fuel cell stacking apparatus 300 shown in FIG. 340 are provided.
- the distance between the positioning columns 330 and 340 is adjusted by inserting the positioning columns 330 and 340 into the reference holes 351 and 352 of the column spacing adjusting jig 350 and bringing the reference side columns 361 and 362 holding the column spacing adjusting jig 350 close to each other. This is done by separating them.
- the spacer 370 can be sandwiched between the adjacent members so that the adjacent members are not temporarily brought into direct contact.
- the spacer 370 is rotatably supported by the support column 380. Operations of the reference side columns 361 and 362 are controlled by a control unit 390 including a CPU, a RAM, a ROM, and the like.
- the fuel cell 10a, the current collector plates 16, 17 and the end plates 25, 26 stacked in the stacking direction of the fuel cell 10a are provided with cooling fluid supply ports 13b-17b, 25b, 26b.
- the positioning column 330 is inserted into the cooling fluid discharge ports 13e to 17e, 25e, and 26e, and the positioning column 340 is inserted into the cooling fluid discharge ports 13e to 17e.
- the cooling fluid supply ports 13b to 17b, 25b, and 26b and the cooling fluid discharge ports 13e to 13e are also used when the separators 13 and 14 and the elastic member 30 are aligned.
- the separators 13 and 14 and the elastic member 30 are aligned. In this way, by using the same shape for positioning when stacking the components of the fuel cell 100 and positioning when forming the separator assembly, the reference for stacking the components of the fuel cell and forming the separator assembly is used. Variations in the positions of the references that occur in different cases do not occur, and assembly variations when stacking the components of the fuel cell or forming the separator assembly can be suppressed.
- the separator assembly 12 manufacturing apparatus 200 includes a separator 210 that conveys the separators 13 and 14 and the elastic member 30 that constitute the separator assembly 12, a predetermined number of separators 13 and 14 that are installed on the conveyor 210, and an elastic member.
- a mounting table 220 (corresponding to the mounting unit) on which the member 30 is mounted, a hand robot 240, 250, 260 on which the separators 13, 14 and the elastic member 30 are mounted on the mounting table 220, and a mounting table 220.
- a welding robot 270 (corresponding to a joining portion) that joins workpieces such as the separators 13 and 14 and the elastic member 30, and a pusher that presses the separator 13 toward the elastic member 30 when the elastic member 30 is joined to the separator 13.
- a pressing member 280 that applies pressure.
- the conveyor 210 conveys workpieces such as the separators 13 and 14 and the elastic member 30 constituting the separator assembly 12 from the left side to the right side in FIG. 2 and sends them to the next process.
- the conveyor 210 is provided with stop positions 210a to 210d for assembling workpieces.
- the mounting table 220 is provided with a positioning member for aligning the separators 13 and 14 and the elastic member 30.
- the positioning member includes biasing members 231 to 235 for moving the elastic member 30 or the separator 13 to a predetermined position, and the elastic member 30 and the separator 13 or the separator 14 biased by the biasing members 231 to 235 to the predetermined member. Fixing pins 221 to 227 for positioning at positions are provided.
- the elastic member 30 is aligned with and bonded to the anode separator 13, but the cathode separator 14 and the elastic member 30 can be aligned and bonded in the same manner.
- the urging members 231 to 235 and the fixing pins 221 to 227 are used for positioning the elastic member 30 (corresponding to a first positioning member).
- the urging members 233 to 235 and the fixing pins 225 to 227 are used for positioning the separator 13 (corresponding to a second positioning member).
- the positioning of the elastic member 30 and the separator 13 on the mounting table 220 is classified into a longitudinal direction d1 and a short direction d2 in the outer shape of the separator 13 in FIG.
- the urging members 231, 233, 234 and the fixing pins 223, 224, 225, 226 are used for positioning in the short direction d2.
- the biasing members 232 and 235 and the fixing pins 221, 222, and 227 are used for positioning in the longitudinal direction d1.
- the power generation characteristics of the fuel cell are greatly influenced by how the corrugations forming the corrugated shapes 13g and 14g of the adjacent separators 13 and 14 come into contact with the elastic member 30. . Therefore, the fixing pins 221 to 227 and the urging members 231 to 235 are positioned by sandwiching the separator 13 and the elastic member 30 from at least the direction in which the corrugations forming the corrugated shapes 13g and 14g are arranged (short direction d2). By doing so, it is possible to accurately match the position of the convex portion of the wavy shape 13g that contacts the elastic member 30 in the standing piece 32 of the elastic member 30 and the separator 13, and it is possible to suppress the electrical resistance between the fuel cells. . Therefore, the fixing pins 221, 222, 227 and the urging members 232, 235 necessary for positioning in the direction d1 in which the uneven cross-sectional shape extends in the waveform shape 13g can be omitted.
- the positioning of the elastic member 30 is performed by pressing the elastic member 30 toward the fixing pins 221 to 224 by the urging members 231 and 232 to make contact.
- the separator 13 is positioned by inserting the fixing pins 226 and 227 through the cooling fluid supply port 13b and the fixing pin 225 through the cooling fluid discharge port 13e, and fixing the separator 13 by the urging members 233 to 235. This is done by pressing against the pins 225 to 227 for contact.
- the separators 13 and 14 are positioned in a cooling fluid supply port 13b and a cooling fluid discharge port which are arranged in pairs with the corrugated shapes 13g and 14g having an uneven shape in the longitudinal direction d1 of the separator 13 therebetween. Positioning is performed by arranging fixing pins 225 and 226 on 13e. Therefore, when the pressing force is applied by the urging members 233 and 234, the situation in which the separator 13 rotates unintentionally when the pressing timing by the urging member 233 and the urging member 234 is shifted is less likely to occur. It is possible to improve the alignment workability.
- the arrangement of the fixing pins 225 and 226 is not limited to the combination of the cooling fluid supply ports 13b and 14b and the cooling fluid discharge ports 13e and 14e, and the cathode gas supply ports 13a and 14a, the cooling fluid supply ports 13b and 14b, and the anode Any one of the gas supply ports 13c and 14c and any one of the anode gas discharge ports 13d and 14d, the cooling fluid discharge ports 13e and 14e, and the cathode gas discharge ports 13f and 14f may be selected. That's fine. Further, the arrangement of the fixing pins 225 and 226 can be similarly applied to the lamination process described with reference to FIG.
- the fixing pins 221 to 227 and the urging members 231 to 235 can be freely retracted and retracted from the mounting surface of the mounting table 220 by a spring or the like. Therefore, even when the elastic member 30 is positioned and the separator 13 is positioned on the mounting table 220, the fixing pins 221 to 224 and the urging members 231 and 232 can be depressed in the mounting table 220, so that positioning of the separator 13 is not hindered. Therefore, the elastic member 30 and the separator 13 can be aligned with high accuracy without expanding the separator 13 and without expanding the elastic member 30 to the same shape as the separator 13. The positioning of the separator 13 with respect to the elastic member 30 does not have to be prevented from installing the separator 13, so that at least the fixing pins 221 to 224 and the urging members 231 and 232 can be retracted from the mounting surface. Just do it.
- the elastic member 30 is configured to be installed first on the mounting table 220 when the elastic member 30 and the separator 13 are joined.
- the elastic member 30 needs to include the cathode gas supply port 13a, the cooling fluid supply port 13b, the anode gas supply port 13c, the anode gas discharge port 13d, the cooling fluid discharge port 13e, and the cathode gas discharge port 13f of the separator 13. There is no. Therefore, the outer shape becomes smaller than the separator 13.
- the elastic member 30 by installing the elastic member 30 first on the mounting table 220, the elastic member 30 can be positioned using the fixing pins 221 to 224 and the urging members 231 and 232, and the elastic member 30 is separated from the separator. The alignment of the elastic member 30 and the separator 13 can be performed without expanding to the same outer shape as that of FIG.
- the height h1 of the fixing pins 221 to 227 and the biasing members 231 to 235 is higher than the height h2 when no load is applied to the elastic member 30 as shown in FIGS. 6 (A) to 6 (C). Is configured to be higher. Therefore, even if the elastic member 30 is pressed against the fixing pins 221 to 224 by the urging members 231 and 232 in a state where the elastic member 30 is not pressed in the stacking direction, the elastic member 30 can be received by the fixing pins 221 to 224. Therefore, it is possible to prevent the elastic member 30 from jumping over the fixing pins 221 to 224 or the urging members 231 and 232 and coming off and improving the alignment workability.
- the hand robots 240, 250, and 260 are articulated robots, and a hand mechanism for gripping components is provided at the tip.
- the hand robots 240, 250, and 260 hold the component by the hand mechanism, move the component to the mounting table 220 by rotating the joint portion, and place the component on the mounting table 220.
- the welding robot 270 has a welding torch attached to the tip, welds and joins the elastic member 30 and the separator 13, and welds and joins the separator 13 and the separator 14.
- the elastic member 30 and the separator 13 are joined by partially welding along a direction in which the cross-sectional shape of the concavo-convex extends about a part 13 k of the concavo-convex constituting the waveform shape 13 g.
- the separator 13 and the separator 14 are joined by the edge 13m of the cathode gas supply port 13a, the edge 13n of the anode gas supply port 13c, the edge 13p of the anode gas discharge port 13d, and the cathode gas discharge port 13f.
- the four sides 13r, 13s, 13t, and 13u that are the outer shape of the edge 13q and the separator 13 are welded.
- the pressing member 280 applies a pressing force that presses the separator 13 toward the elastic member 30 when the elastic member 30 and the separator 13 are joined. It is necessary for the elastic member 30 and the separator 13 to irradiate a laser or the like from the welding robot 270 on a portion that contacts the elastic member 30 in the plurality of projections and depressions constituting the corrugated shape 13g of the separator 13. Therefore, the pressing member 280 is provided with a slit as shown in FIG. 11A so that the laser beam can be transmitted above the position where the corrugated shape 13g contacts the elastic member 30 when aligned with the separator 13. .
- the separator assembly is formed by preparing the separators 13 and 14 and the elastic member 30 (step ST10), and a first placement step of placing the elastic member 30 on the placement surface of the placement table 220 (step ST10).
- Step ST20 a second placement step for installing the separator 13 on the placement table 220 in a state where the elastic member 30 is positioned, and a first joining step (joining) for joining the elastic member 30 and the separator 13 Equivalent to the process, step ST40), and a second joining process for joining the separator 13 and the separator 14 (corresponding to another joining process, step ST50).
- a part installation place (not shown) is provided at a position where the hand robots 240 and 250 can hold, and parts constituting the fuel cell such as the elastic member 30 and the separators 13 and 14 are prepared.
- the mounting table 220 installed on the conveyor 210 shown in FIG. 2 is transported to the position 210a.
- the robot 240 grips the elastic member 30 from the part installation location and conveys it to the mounting table 220 at the position 210a.
- the robot 240 temporarily moves the biasing members 231 and 232 in the direction away from the fixing pins 221 to 224 by the grasped elastic member 30.
- the elastic member 30 is moved toward the fixing pins 221 to 224 using the urging force of the urging members 231 and 232, and the elastic member 30 is held between the urging members 231 and 232 and the fixing pins 221 to 224. As a result, the elastic member 30 is positioned on the mounting table 220.
- the mounting table 220 is transported to the position 210b.
- the robot 250 grips the anode separator 13 from the component installation location and conveys it to the mounting table 220 at the position 210b.
- the urging members 233 to 235 are moved away from the fixing pins 225 to 227 by the separator 13, and the separator 13 is moved toward the fixing pins 225 to 227 using the urging force of the urging members 233 to 235.
- the urging members 233 to 235 and the fixing pins 225 to 227 are sandwiched.
- the separator 13 is positioned on the mounting table 220, and the elastic member 30 and the separator 13 are aligned. After positioning the separator 13 on the mounting table 220, the pressing member 280 is mounted on the separator 13 in order to bring the separator 13 and the elastic member 30 into sufficient contact.
- the mounting table 220 is conveyed to the position 210c.
- the first joining step at the position 210c, first, the position of the elastic member 30 and the separator 13 is confirmed, and the welding head 271 of the welding robot 270 is provided on the pressing member 280 in order to join the elastic member 30 and the separator 13. It is moved between the formed slits, that is, over the head of the weld. And welding joining is performed along the direction where the waveform shapes 13g and 14g of the separator 13 extend.
- the predetermined position 13k (refer FIG. 5) of the waveform shape 13g of the separator 13 is weld-joined, and the elastic member 30 and the separator 13 are joined.
- the mounting table 220 is transported to the position 210d.
- the robot 260 grasps the joined elastic member 30 and the separator 13 and rotates them 180 degrees. Thereby, the positional relationship between the elastic member 30 and the separator 13 changes from the state shown in FIG. 6A to the state shown in FIG.
- the mounting table 220 is arranged at the position 210b, and the elastic member 30 and the separator 13 that are turned upside down are positioned on the mounting table 220 as shown in FIG.
- the fixing pins 221 to 224 and the urging members 231 and 232 can be recessed in the mounting table 220, installation of the separator 13 to which the elastic member 30 is joined is not hindered.
- the positioning of the separator 13 to which the elastic member 30 is joined moves the urging members 233 to 235 away from the fixing pins 225 to 227 in the same manner as described above. Then, the separator 13 to which the elastic member 30 is joined is moved toward the fixing pins 225 to 227 using the urging force of the urging members 233 to 235, and the fixing pins 225 to 227 and the urging members 233 to 235 are used. Hold it. As a result, the separator 13 to which the elastic member 30 is bonded is positioned with respect to the mounting table 220.
- the separator 14 is positioned on the separator 13 to which the elastic member 30 is joined, using the fixing pins 225 to 227 and the urging members 233 to 235 in the same manner as the separator 13. Thereby, the separator 13 and the separator 14 are aligned.
- the mounting table 220 is transferred to the position 210b.
- the welding robot 270 welds the edges 13m, 13n, 13p, 13q and the four sides 13r, 13s, 13t, 13u of the separator 13 to join them. Welding is performed on the edges 13m, 13n, 13p, and 13q, and then four sides 13r, 13s, 13t, and 13u are performed. Since the power generation characteristics of the fuel cell 100 are affected by the contact between the corrugated shapes of the separators 13 and 14, welding of the four sides 13r, 13s, 13t, and 13u causes the sides 13r and 13t to be connected to the sides 13s and 13u. Do it first. Thus, by joining the edge portions 13m, 13n, 13p, and 13q of the separator 13 and the four sides 13r, 13s, 13t, and 13u, the separator 13 and the separator 14 are joined, and the separator assembly 12 is completed.
- the separator assembly 12 is arranged on both side surfaces of the MEA 11 to form the fuel cell 10a, and a predetermined number of the fuel cells 10a are stacked to form the stacked body 10. Then, the current collector plates 16 and 17 are arranged in the stacking direction of the laminate 10, and the laminate 10 and the current collector plates 16 and 17 are covered with the fastening plates 21 and 22, the reinforcing plates 23 and 24, and the end plates 25 and 26. . Then, the laminated body 10, the current collecting plates 16, 17 and the end plates 25, 26 are pressurized by attaching screws 27 to the fastening plates 21, 22, and the fuel cell 100 is completed.
- an elastic member may be provided between the separators in order to suppress electrical resistance between the fuel cells due to a contact state between adjacent separators among adjacent fuel cells.
- the elastic member absorbs the variation in the shape of the portion of the separator that corresponds to the corrugated shape, the fuel, the oxidant, and the cooling provided outside the corrugated shape are considered only by laminating. There is no need to expand the shape to the medium flow hole.
- the outer shape of the separator is different from that of the elastic member, so the elastic member having a smaller outer shape is the same as the separator. In this case, the cost of the elastic member is increased.
- the separators 13 and 14 and the elastic member 30 having a smaller outer shape than the separators 13 and 14 are prepared, and the fixing pins 221 to 224 and the urging force are provided.
- the elastic member 30 is positioned by the members 231 and 232, and the separator 13 is positioned and held by the fixing pins 225 to 227 and the biasing members 233 to 235 so as to be held in contact with the elastic member 30.
- the fixing pins 221 to 224 and the urging members 233 to 235 corresponding to the first positioning member can be retracted so as not to protrude from the mounting surface.
- the second mounting process is configured to be performed after the first mounting process. That is, when the elastic member 30 and the separators 13, 14 are installed on the mounting table 220, the separator 13 is installed after the elastic member 30 is installed on the mounting table 220 for alignment. Therefore, even if the elastic member 30 is not provided with the cathode gas supply port 13a, the cooling fluid supply port 13b, the anode gas supply port 13c, the anode gas discharge port 13d, the cooling fluid discharge port 13e, and the cathode gas discharge port 13f, the elastic member 30 is provided. Positioning on the mounting table 220 and positioning with the separator 13 can be performed, and positioning with the separator 13 can be performed with high accuracy while suppressing an increase in the component cost of the elastic member 30.
- the fixing pins 221 to 224 and the urging members 231 and 232 corresponding to the first positioning member and the fixing pins 225 to 227 and the urging members 233 to 235 corresponding to the second positioning member are at least the waveforms of the separators 13 and 14.
- the elastic member 30 or the separator 13 is sandwiched from the direction in which the irregularities constituting the shapes 13g and 14g are arranged. In the contact between the adjacent separators, the power generation characteristics of the fuel cell are greatly influenced by how the corrugations forming the corrugated shapes 13g and 14g of the adjacent separators 13 and 14 come into contact with the standing pieces 32 of the elastic member 30. That's what it means.
- the separator 13 and the elastic member 30 are sandwiched from at least the direction in which the corrugations 13g and 14g are arranged, the positional relationship between the two in the direction in which the corrugations are arranged can be accurately matched. There is no need to expand the shape to the shape of the separators 13 and 14. Therefore, even if the elastic member 30 is not expanded to the same shape as the separators 13 and 14, the position of the elastic member and the separator can be accurately aligned to suppress the electric resistance between the fuel cells.
- the separators 13 and 14 are cathode gas supply ports 13a and 14a through which fuel, an oxidant, or a cooling medium for generating an electromotive force in the fuel cell 100 is circulated, cooling medium supply ports 13b and 14b, and an anode gas supply port 13c. , 14c, anode gas discharge ports 13d and 14d, cooling medium discharge ports 13e and 14e, and cathode gas discharge ports 13f and 14f.
- the fixing pins 225 to 227 and the biasing members 233 to 235 corresponding to the second positioning member are The elastic member 30 and the separator 13 are aligned using the cooling medium supply ports 13b and 14b and the cooling medium discharge ports 13e and 14e. Therefore, a positioning-dedicated shape for positioning with the elastic member 30 is provided, and alignment with the elastic member 30 is performed without dividing the specification of the separator with the fuel cell not using the elastic member 30. Can do.
- the cathode gas supply ports 13a and 14a, the cooling fluid supply ports 13b and 14b, which are arranged in pairs with the corrugated shapes 13g and 14g of the separators 13 and 14 being spaced apart, are anodes.
- the separator 13 is positioned using the gas supply ports 13c and 14c, the anode gas discharge ports 13d and 14d, the cooling fluid discharge ports 13e and 14e, and the cathode gas discharge ports 13f and 14f. Therefore, when the separator 13 is positioned, the situation in which the separator 13 rotates unintentionally and takes time for positioning can be prevented, and the positioning workability can be improved.
- the heights of the fixing pins 221 to 227 and the biasing members 231 to 235 used for positioning the elastic member 30 and the separator 13 are higher than the height when the elastic member 30 is not pressed. It is configured as follows. Therefore, even when the elastic member 30 is not pressed and the part of the standing piece 32 is not bent, the elastic member 30 can be firmly held by the fixing pins 221 to 227 and the urging members 231 to 235, and the positioning reliability is improved. Can be improved.
- a second joining step for aligning and joining the separator 13 and the separator 14 is performed. Since the elastic member 30 is disposed between the separator 13 and the separator 14, for example, after the outer periphery of the separator 13 and the separator 14 is partially bonded, the elastic member 30 is disposed between the separator 13 and the separator 14 and bonded. If it is going to be, since the position cannot be hold
- the separator assembly can be formed in a state where the elastic member 30 is aligned with the corrugated shapes 13g and 14g of the separators 13 and 14 with high accuracy, and the electrical resistance between the fuel cells can be satisfactorily suppressed.
- the separator 13 and the separator 14 are joined by the cathode gas supply port 13a, the cooling fluid supply port 13b, the anode gas supply port 13c, the anode gas discharge port 13d, the cooling fluid supply port 13e, the cathode gas discharge.
- the sides 13r and 13t adjacent to the corrugated shape 13g are welded before the sides 13s and 13u adjacent to the outlet 13f. As described above, the contact state of the corrugated shape of adjacent separators has a great influence on the increase in electrical resistance between fuel cells.
- the elastic member 30 when the elastic member 30 is sandwiched between the separator 13 and the separator 14 by first joining the sides 13r and 13t close to the waveform shape 13g among the four sides that are the outer shape of the separator 13, the elastic member 30 Can be prevented, and the separators 13 and 14 can be brought into contact with the elastic member 30 with high accuracy to suppress an increase in electrical resistance between the fuel cells.
- the elastic member 30 is configured to be pressed in the stacking direction of the elastic member 30 and the separator 13 in a state where the elastic member 30 is in contact with the mounting surface of the mounting table 220. Therefore, the elastic member 30 can be further brought into close contact with the separator 13 and joined by the restoring force of the elastic member 30, which can contribute to the suppression of an increase in electrical resistance between the fuel cells.
- the cooling fluid supply port 13b and the cooling fluid discharge port 13e used for positioning the elastic member 30 and the separator 13 are the stacked body 10 in which the fuel cells 10a are stacked in the stacking process, and current collector plates at both ends of the stacked body 10. It is also used as a positioning shape when positioning by positioning 16 and 17 and end plates 25 and 26. For this reason, it is possible to prevent variations between the standards that are caused by the difference between the reference for stacking the fuel cell components and the reference for forming the separator assembly, and the stacking of the fuel cell components. And assembly variations when forming the separator assembly can be suppressed.
- the pressing load that presses the separator 13 toward the elastic member 30 by the pressing member 280 in the first joining step applies a larger load than the pressing load that is applied in the stacking step of stacking the fuel cell components. ing.
- the elastic member 30 and the separator 13 are joined, the elastic member 30 is not sandwiched between the separators 13 and 14 and can return to the extended state by the restoring force.
- the elastic member 30 can be hardly plastically deformed even when a large load is applied, and the elastic member 30 is buffered.
- the function as a member can be improved.
- the elastic member 30 and the separator 13 are joined by forming edge portions 13m, 13n, 13p, 13q, and the like after forming several joint portions 13k (12 locations in FIG. 10) along the extending direction of the corrugated shape of the separator 13.
- edge portions 13m, 13n, 13p, 13q, and the like after forming several joint portions 13k (12 locations in FIG. 10) along the extending direction of the corrugated shape of the separator 13.
- edges 13m, 13n, 13p, 13q and the outer circumferences 13r, 13s, 13t. , 13u can be joined, and the remaining part of the joint part 13k in the corrugated shape can be welded.
- 10 laminates 10a Fuel cell, 100 fuel cells, 11 Membrane electrode assembly, 11a electrolyte membrane, 11b anode, 11c cathode, 12 Separator assembly, 13 Anode separator (first separator), 13g waveform shape, 14 cathode separator (second separator), 14g waveform shape, 15 frame member, 16, 17 current collector plate, 20 housing, 21, 22 fastening plate, 23, 24 Reinforcement plate, 25, 26 End plate (end member), 27 screws, 210 conveyor, 210a to 210d Stop position of mounting table, 220 mounting table (mounting unit), 221 to 227 fixing pin, 231 to 235 biasing member, 240, 250, 260 hand robot, 270 welding robot (joint), 280 pressing member, 13a, 14a Cathode gas supply port (separator flow hole), 13b, 14b Cooling fluid supply port (separator flow hole), 13c, 14c Anode gas supply port (separator flow hole), 13d, 14d Anode gas outlet (s
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Abstract
Description
燃料電池用セパレータアセンブリの製造方法と製造装置について説明する前に、燃料電池用セパレータアセンブリを構成部品として備える燃料電池について説明する。燃料電池100は、燃料電池セル10aを複数積層した積層体10を主要な構成要素として有している。燃料電池セル10aは、膜電接合体11の両側にセパレータ13,14を配置して構成している。膜電極接合体11は、電解質膜11aの片側にアノード11b、もう片側にカソード11cが接合されている。セパレータアセンブリ12は、2枚のセパレータ13,14と、セパレータ13とセパレータ14との間にセパレータ13、14の波形形状13g、14gと接触する弾性部材30と、を有する。また、積層体10の積層方向における両端部には集電板16,17が設けられている。また、燃料電池100は、筐体20を有している。筐体20は、一対の締結板21、22と補強板23、24、及びエンドプレート25,26(端部部材に相当)を有している。以下、燃料電池セル100に含まれる各部材について説明する。
次に本実施形態に係る燃料電池を構成するセパレータアセンブリの製造について詳細に説明する。なお、セパレータアセンブリ以外の燃料電池の構成部品を製造する工程及び各構成部品を組み立てる工程は公知の装置を用いるため、説明を省略する。
次に本実施形態に係るセパレータアセンブリを形成する工程について説明する。セパレータアセンブリの形成は、セパレータ13,14及び弾性部材30を準備する準備工程(ステップST10)と、弾性部材30を載置台220の載置面に位置決めするように載置する第1載置工程(ステップST20)と、弾性部材30が位置決めされた状態で載置台220にセパレータ13を設置する第2載置工程(ステップST30)と、弾性部材30とセパレータ13とを接合する第1接合工程(接合工程に相当、ステップST40)と、セパレータ13とセパレータ14とを接合する第2接合工程(他の接合工程に相当、ステップST50)と、を有する。
準備工程では、ハンドロボット240、250が把持できる位置に不図示の部品設置場所が設けられ、弾性部材30、セパレータ13,14等の燃料電池を構成する部品が用意される。第1載置工程において、図2に示すコンベヤー210に設置された載置台220は、位置210aに搬送される。ロボット240は、部品設置場所から弾性部材30を把持し、位置210aの載置台220まで搬送する。ロボット240は、把持した弾性部材30によって付勢部材231、232を固定ピン221~224から遠ざける方向に一旦移動させる。そして、付勢部材231、232の付勢力を利用して弾性部材30を固定ピン221~224に向かって移動させ、付勢部材231,232と固定ピン221~224によって弾性部材30を挟持させる。これによって、弾性部材30は、載置台220に位置決めされる。
弾性部材30の位置決めが完了したら、載置台220は位置210bへと搬送される。第2載置工程においてロボット250は、部品設置場所からアノードセパレータ13を把持し、位置210bの載置台220まで搬送する。そして、セパレータ13によって付勢部材233~235を固定ピン225~227から離れるように移動させて、付勢部材233~235の付勢力を利用してセパレータ13を固定ピン225~227に向かって移動させて、付勢部材233~235及び固定ピン225~227によって挟持させる。これによってセパレータ13は載置台220に位置決めされ、弾性部材30とセパレータ13とが位置合わせされる。セパレータ13を載置台220に位置決めした後にはセパレータ13と弾性部材30とを充分に接触させるために押圧部材280をセパレータ13の上に載置する。
次に、載置台220は位置210cに搬送される。第1接合工程において位置210cでは、まず、弾性部材30とセパレータ13との位置を確認し、弾性部材30とセパレータ13とを接合するために、溶接ロボット270の溶接ヘッド271を押圧部材280に設けられたスリットの間、すなわち溶接箇所の頭上に移動させる。そして、セパレータ13の波形形状13g、14gの延びる方向に沿って溶接接合を行う。これにより、セパレータ13の波形形状13gの所定位置13k(図5参照)が溶接接合されて、弾性部材30とセパレータ13とが接合される。
第1接合工程が終了したら、載置台220は位置210dまで搬送される。第2接合工程において位置210dでは、ロボット260が接合された弾性部材30とセパレータ13を把持して180度回転させる。これにより、弾性部材30とセパレータ13との位置関係が図6(A)に示す状態から図6(B)に示す状態に変化する。そして、位置210bに載置台220を配置して、図6(B)に示すように上下を反転させた弾性部材30及びセパレータ13を載置台220に位置決めする。上記のように固定ピン221~224及び付勢部材231、232は載置台220に陥没できるため、弾性部材30が接合されたセパレータ13の設置を妨げることはない。
セパレータアセンブリ12が完成したら、MEA11の両側面にセパレータアセンブリ12を配置して燃料電池セル10aを形成し、燃料電池セル10aを所定数積層して積層体10を形成する。そして、積層体10の積層方向に集電板16,17を配置し、締結板21、22、補強板23、24、及びエンドプレート25,26によって積層体10及び集電板16,17を覆う。そして、締結板21,22にネジ27取り付けて締結することによって積層体10、集電板16,17、及びエンドプレート25,26が加圧されて燃料電池100が完成する。
10a 燃料電池セル、
100 燃料電池、
11 膜電極接合体、
11a 電解質膜、
11b アノード、
11c カソード、
12 セパレータ組み立て体、
13 アノードセパレータ(第1セパレータ)、
13g 波形形状、
14 カソードセパレータ(第2セパレータ)、
14g 波形形状、
15 フレーム部材、
16、17 集電板、
20 筐体、
21、22 締結板、
23、24 補強板、
25、26 エンドプレート(端部部材)、
27 ネジ、
210 コンベヤー、
210a~210d 載置台の停止位置、
220 載置台(載置部)、
221~227 固定ピン、
231~235 付勢部材、
240、250、260 ハンドロボット、
270 溶接ロボット(接合部)、
280 押圧部材、
13a、14a カソードガス供給口(セパレータ流通孔)、
13b、14b 冷却流体供給口(セパレータ流通孔)、
13c、14c アノードガス供給口(セパレータ流通孔)、
13d、14d アノードガス排出口(セパレータ流通孔)、
13e、14e 冷却流体排出口(セパレータ流通孔)、
13f、14f カソードガス排出口(セパレータ流通孔)、
15a、16a、17a、25a、26a カソードガス供給口(連通孔)、
15b、16b、17b、25b、26b 冷却流体供給口(連通孔)、
15c、16c、17c、25c、26c アノードガス供給口(連通孔)、
15d、16d、17d、25d、26d アノードガス排出口(連通孔)、
15e、16e、17e、25e、26e 冷却流体排出口(連通孔)、
15f、16f、17f、25f、26f カソードガス排出口(連通孔)、
13k 波形形状における溶接箇所、
13m、13n、13p、13q カソードガス供給口、アノードガス供給口、アノードガス排出口、カソードガス排出口における溶接箇所、
13r、13s、13t、13u セパレータの外周における溶接箇所、
30 弾性部材、
31 基部面、
32 起立片、
32a 固定端部、
32b 自由端部、
300 積層装置、
310 支持台、
320 基準台、
330、340 位置決め柱、
350 柱間隔、
351,352 基準孔、
361、362 基準側柱、
370 スペーサ、
380 支持柱、
390 コントローラー、
d1 セパレータの長手方向(波形形状が延在する方向)、
d2 セパレータの短手方向(波形形状を構成する複数の凹凸が並ぶ方向)。
Claims (12)
- 膜電極接合体に隣接して設けられ流体を流す流路を形成する、燃料電池用のセパレータアセンブリの製造方法であって、
断面形状に凹凸形状を有する第1セパレータと、断面形状に凹凸形状を有する第2セパレータと、前記第1セパレータ及び前記第2セパレータを面方向から見た平面視の外形形状よりも小さい外形形状を有し、前記第1セパレータと前記第2セパレータとの間に配置されて対向する前記第1セパレータの凸部及び前記第2セパレータの凸部との接触を弾性変形によって維持する導電性を備えた弾性部材と、を準備する準備工程と、
載置面に設けられた第1位置決め部材を前記弾性部材に当接させることによって、前記弾性部材を位置決めして前記載置面に載置する第1載置工程と、
前記載置面において前記第1位置決め部材が設けられた領域よりも外側の領域に設けられた第2位置決め部材を前記第1セパレータに当接させることによって、前記第1セパレータを前記弾性部材に対して位置決めして前記弾性部材に重ねて載置する第2載置工程と、
位置決めして重ね合わされた前記弾性部材と前記第1セパレータとを接合する接合工程と、を有し、
前記第2載置工程においては、前記弾性部材を位置決めしている前記第1位置決め部材を前記載置面から退避させながら、前記第1セパレータを前記弾性部材に重ね合わせる、燃料電池用のセパレータアセンブリの製造方法。 - 前記第2載置工程は前記第1載置工程の後に行われる請求項1に記載の燃料電池用のセパレータアセンブリの製造方法。
- 前記第1位置決め部材及び前記第2位置決め部材は、少なくとも前記第1セパレータ及び前記第2セパレータの前記凹凸形状が並ぶ方向から前記第1セパレータ及び前記弾性部材を挟持するように配置される請求項1または2に記載の燃料電池用のセパレータアセンブリの製造方法。
- 前記第1セパレータ及び前記第2セパレータは、前記燃料電池に起電力を発生させるための燃料、酸化剤、又は前記燃料電池を冷却する冷却流体を流通させる複数のセパレータ流通孔を有し、
前記第2位置決め部材は、前記セパレータ流通孔を用いて前記第1セパレータの位置決めを行う請求項1~3のいずれか1項に記載の燃料電池用のセパレータアセンブリの製造方法。 - 前記セパレータ流通孔は、平面視した際に断面形状が凹凸形状となる部位を隔てて対になって配置され、
前記第2載置工程では、対になって配置された前記セパレータ流通孔を用いて前記第1セパレータの位置決めを行なう請求項4に記載の燃料電池用のセパレータアセンブリの製造方法。 - 前記第1位置決め部材及び前記第2位置決め部材は、荷重を付加していない場合の前記弾性部材の高さよりも高く構成される請求項1~5のいずれか1項に記載の燃料電池用のセパレータアセンブリの製造方法。
- 前記接合工程の後に前記第1セパレータと前記第2セパレータとを接合する他の接合工程と、をさらに有する請求項1~6のいずれか1項に記載の燃料電池用のセパレータアセンブリの製造方法。
- 前記第1セパレータ及び前記第2セパレータは、前記セパレータ流通孔と隣接する第1の辺の対と、
前記第1の辺の対よりも前記断面形状が凹凸形状となる部位と隣接する第2の辺の対と、を有し、
前記他の接合工程では、前記第2の辺の対を前記第1の辺の対よりも先に接合する請求項7に記載の燃料電池用のセパレータアセンブリの製造方法。 - 前記接合工程において前記弾性部材は、前記載置面と接触した状態で前記弾性部材及び前記第1セパレータの積層方向に押圧される請求項1~8のいずれか1項に記載の燃料電池用のセパレータアセンブリの製造方法。
- 請求項1~9のいずれか1項に記載の前記セパレータアセンブリと前記膜電極接合体とを交互に積層し、積層された前記膜電極接合体及び前記セパレータアセンブリよりも積層方向における両端に集電板及び端部部材を少なくとも配置し、前記積層方向から押圧荷重を付加する積層工程、をさらに有し、
前記膜電極接合体は、外周部にフレーム部材を有し、
前記フレーム部材、前記集電板、及び前記端部部材は、積層の際に前記セパレータ流通孔と連通する連通孔を各々有し、
前記積層工程では、前記セパレータ流通孔と、前記フレーム部材、前記集電板及び前記端部部材の前記連通孔の縁部を用いて前記セパレータアセンブリ、前記膜電極接合体、前記集電板、及び前記端部部材の位置合わせを行う燃料電池の製造方法。 - 前記接合工程において前記弾性部材には前記積層工程の際よりも大きな押圧荷重が前記積層方向から付加される請求項10に記載の燃料電池の製造方法。
- 膜電極接合体に隣接して設けられ流体を流す流路を形成する、燃料電池用のセパレータアセンブリの製造装置であって、
前記セパレータアセンブリは、断面形状に凹凸形状を有する第1セパレータと、断面形状に凹凸形状を有する第2セパレータと、前記第1セパレータ及び前記第2セパレータを面方向から見た平面視の外形形状よりも小さい外形形状を有し、前記第1セパレータと前記第2セパレータとの間に配置されて対向する前記第1セパレータの凸部及び前記第2セパレータの凸部との接触を弾性変形によって維持する導電性を備えた弾性部材と、を有し、
前記製造装置は、前記弾性部材及び前記第1セパレータ及び前記第2セパレータを載置する載置部と、
前記載置部の載置面に設けられ、前記弾性部材に当接させることによって前記弾性部材を位置決めする第1位置決め部材と、
前記第1位置決め部材が設けられた領域よりも外側の領域に設けられ、前記第1セパレータに当接させることによって前記第1セパレータを前記弾性部材に対して位置決めする第2位置決め部材と、
前記第1位置決め部材及び前記第2位置決め部材によって位置合わせされた前記弾性部材と前記第1セパレータとを接合する接合部と、を有し、
前記第1位置決め部材は、前記載置面から退避可能である燃料電池用のセパレータアセンブリの製造装置。
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JP2019192372A (ja) * | 2018-04-19 | 2019-10-31 | トヨタ自動車株式会社 | 燃料電池用のセパレータ材の搬送方法 |
JP6996408B2 (ja) | 2018-04-19 | 2022-02-04 | トヨタ自動車株式会社 | 燃料電池用のセパレータ材の搬送方法 |
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EP3001488A4 (en) | 2016-06-01 |
JP6115633B2 (ja) | 2017-04-19 |
CA2913316C (en) | 2017-10-10 |
CN105210221A (zh) | 2015-12-30 |
JPWO2014188807A1 (ja) | 2017-02-23 |
US9793553B2 (en) | 2017-10-17 |
CA2913316A1 (en) | 2014-11-27 |
EP3001488A1 (en) | 2016-03-30 |
CN105210221B (zh) | 2018-10-30 |
EP3001488B1 (en) | 2017-10-04 |
US20160079611A1 (en) | 2016-03-17 |
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