WO2017026447A1 - 燃料電池 - Google Patents

燃料電池 Download PDF

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Publication number
WO2017026447A1
WO2017026447A1 PCT/JP2016/073302 JP2016073302W WO2017026447A1 WO 2017026447 A1 WO2017026447 A1 WO 2017026447A1 JP 2016073302 W JP2016073302 W JP 2016073302W WO 2017026447 A1 WO2017026447 A1 WO 2017026447A1
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WO
WIPO (PCT)
Prior art keywords
pressing
cell
pressing member
elastic member
disposed
Prior art date
Application number
PCT/JP2016/073302
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
広之 上荷
Original Assignee
住友精密工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友精密工業株式会社 filed Critical 住友精密工業株式会社
Priority to JP2017534445A priority Critical patent/JP6359775B2/ja
Priority to DE112016003661.2T priority patent/DE112016003661T5/de
Priority to CN201680045826.7A priority patent/CN107851829A/zh
Priority to KR1020187002874A priority patent/KR20180034454A/ko
Publication of WO2017026447A1 publication Critical patent/WO2017026447A1/ja

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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
    • H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
    • 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
    • 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
    • H01M8/1213—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the electrode/electrolyte combination or the supporting material
    • 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
    • H01M8/2465—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • the present invention relates to a fuel cell.
  • the fuel cell described in the above-mentioned JP-A-2013-20886 is provided with a load plate for applying a load to the stack (a stack of a solid oxide fuel cell comprising an anode, a cathode and an electrolyte membrane) in the stacking direction. ing.
  • the load plate has a single plate shape covering substantially the entire area of the laminate in a plan view.
  • a fuel cell holder is disposed between the load plate and the stack.
  • the fuel cell holder is composed of a composite layer of alumina fiber and vermiculite.
  • the fuel cell holding portion is configured to cover substantially the entire area of the laminate in a plan view. Then, a load is applied to the stack by the load plate via the fuel cell holder.
  • the fuel cell holder is disposed on the surface of the stack disposed at the top of the plurality of stacks.
  • the plate-like body disposed on the cathode side (upper side) of the membrane electrode assembly (anode, cathode, electrolyte membrane), and the upper side of the plate-like body
  • the plate-like body is made of a polyethylene porous film, and is configured to cover substantially the entire area of the membrane electrode assembly in plan view.
  • the pressing member is made of a stainless steel plate, and is disposed on the vicinity of the central portion of the membrane electrode assembly (a part of the membrane electrode assembly) in plan view.
  • a cover plate is provided to cover the plate-like body and the pressing member.
  • a pressing force generated by fastening the cover plate to the container by screws or caulking is applied to the central portion of the membrane electrode assembly through the pressing member and the plate-like body.
  • the plate-like body is disposed on the surface of the membrane electrode assembly disposed at the top of the plurality of membrane electrode assemblies.
  • a relatively soft alumina fiber is provided between the load plate and the stack so as to cover substantially the entire area of the stack (the separator included in the stack).
  • a composite layer with vermiculite is arranged. For this reason, when the outer edge of the separator sandwiching the cell is to be deformed upward, the relatively soft composite layer is disposed above the separator, so that the outer edge of the separator is likely to be deformed upward. Is considered. This is considered to cause a problem that the contact between the cell and the separator becomes poor and the contact resistance between the cell and the separator increases.
  • the fuel cell holding portion (plate-like body) is disposed at the top of the plurality of stacks. Since it arrange
  • the present invention has been made to solve the problems as described above, and one object of the present invention is to provide a fuel cell capable of suppressing an increase in contact resistance between a cell and a separator. To provide.
  • a fuel cell comprises a plurality of power generations each including a cell having one electrode and the other electrode, and a separator sandwiching the cell and larger than the cell in plan view
  • the unit and the inter-unit elastic member disposed between the plurality of power generation units stacked so as to overlap the cell of the power generation unit in plan view, and the unit-side elastic member and the unit on the outer peripheral side of the cell in plan view
  • an inter-unit pressing member disposed between the plurality of power generation units to be stacked and made of a member harder than the inter-unit elastic member.
  • the inter-unit elastic member disposed between the plurality of power generation units stacked so as to overlap the cells of the power generation unit in plan view
  • the unit comprises an inter-unit pressing member disposed between the plurality of power generation units stacked on the outer peripheral side of the cell so as not to overlap with the inter-unit elastic member, and made of a member harder than the inter-unit elastic member.
  • the outer edge of the separator (the part of the separator disposed outside the cell in plan view) which is larger than the cell in plan view is deformed upward, the deformation of the outer edge portion This can be suppressed by the surface pressure of the inter-unit pressing member which is disposed on the side (upper side) and which is a member harder than the inter-unit elastic member.
  • the inter-unit elastic member and the inter-unit pressing member made of a member harder than the inter-unit elastic member are disposed between the plurality of power generation units to be stacked, the lower portion of the plurality of power generation units to be stacked is It is also possible to apply sufficient load to the power generation units located at By these, since the contact failure between a cell and a separator is suppressed, it can suppress that the contact resistance between a cell and a separator becomes large.
  • an inter-unit pressure is disposed between the power generation unit and the inter-unit elastic member and the inter-unit pressing member to pressurize the inter-unit elastic member and the inter-unit pressing member. It further comprises a member. According to this structure, the inter-unit elastic member and the inter-unit pressing member can be pressurized via the inter-unit pressing member by the weight of the power generation unit.
  • the inter-unit pressing member is provided with an opening in a region corresponding to the region where the cell of the power generation unit is disposed in plan view, and the inter-unit elastic member Are disposed in the opening.
  • the outer edge of the separator (the portion of the separator disposed outside the cell in plan view) is pressed by the inter-unit pressing member provided so as to surround the opening. It is possible to further suppress the deformation of the outer edge portion when the portion is deformed upward.
  • the inter-unit pressing member has a frame shape in which an opening is provided at the center. According to this structure, the entire periphery of the outer edge of the separator is pressed by the inter-unit pressing member in the shape of a frame, thereby further suppressing the deformation of the outer edge when the outer edge of the separator tries to deform upward. be able to.
  • the inter-unit pressing member includes at least one of a metal pressing member and an insulating pressing member.
  • the inter-unit pressing member includes the metal pressing member
  • the outer edge portion of the separator can be pressed by the relatively hard metal pressing member. It is possible to effectively suppress the deformation of the outer edge when trying to deform upward.
  • the inter-unit pressing member is an insulating pressing member
  • the outer edge portion of the separator can be pressed while securing the insulating property by the inter-unit pressing member.
  • the inter-unit elastic member includes a ceramic fiber mat in which ceramic fibers are formed in a mat shape. According to this structure, since the ceramic fiber mat has relatively high heat resistance, substantially uniform surface pressure (sufficient pressure) can be applied to the cell even at relatively high temperature.
  • a fuel cell includes a power generation unit including a cell having one electrode and the other electrode, and a separator sandwiching the cell and larger than the cell in plan view, and a cell of the power generation unit in plan view
  • a first elastic member disposed on the one electrode side of the cell, and the first elastic member disposed on the one electrode side of the cell so as not to overlap the first elastic member on the outer peripheral side of the cell in plan view
  • a first pressing member formed of a member harder than the elastic member and pressing the outer peripheral side of the cell, and disposed on the opposite side of the cell of the first elastic member, made of a member harder than the first elastic member, the first elasticity
  • a second pressing member for pressing the cell via the member.
  • the first elastic member disposed on one electrode side of the cell does not overlap the first elastic member on the outer peripheral side of the cell in plan view
  • the lower side portion of the first elastic member follows the concave shape even when the separator sandwiching the cell is deformed in a concave shape so as to be depressed downward. Since the upper surface of the first elastic member becomes substantially flat while being elastically deformed as described above, the cell and the central portion of the separator in which the cells are arranged by the second pressing member via the first elastic member are substantially uniform. Pressure (sufficient pressure) can be applied.
  • the first pressing member that is made of a member harder than the first elastic member and presses the outer peripheral side of the cell on the outer peripheral side of the cell
  • the outer edge portion of the separator in plan view
  • the deformation of the outer edge portion is made from a member harder than the first elastic member placed on the one electrode side (upper side) of the cell It can be suppressed by the surface pressure of the first pressing member.
  • the lower portion of the first elastic member elastically deforms along the concave and the upper surface of the first elastic member becomes substantially flat.
  • a substantially uniform surface pressure (sufficient pressure) can be applied to the cell by the second pressing member via the first elastic member. This can also suppress an increase in contact resistance between the cell and the separator.
  • the height position of the second pressing member is lower than the height position of the first pressing member due to the decrease in thickness of the first elastic member due to a change with time or the like. Even in the case where the first pressing member and the second pressing member are provided so as to cover the first pressing member, the height position is different from the case where the first pressing member and the second pressing member are directly pressurized. It can be suppressed that the low second pressing member can not be pressurized.
  • the first pressing member is provided with an opening in a region corresponding to the region in which the cell of the power generation unit is disposed in plan view, and the first elastic member Are disposed in the opening.
  • the outer edge of the separator (the portion of the separator disposed outside the cell in plan view) is pressed by the first pressing member provided so as to surround the opening. It is possible to further suppress the deformation of the outer edge portion when the portion is deformed upward.
  • the first pressing member has a frame shape in which an opening is provided at a central portion. According to this structure, the entire periphery of the outer edge portion of the separator is pressed by the frame-shaped first pressing member, so that the deformation of the outer edge portion is further suppressed when the outer edge portion of the separator tries to be deformed upward. be able to.
  • the fuel cell according to the second aspect preferably further includes an insulating member disposed between the second pressing member and the first elastic member. According to this structure, even when the second pressing member is made of metal, the second pressing member can be insulated by the insulating member.
  • the first pressing member includes at least one of a metal pressing member and an insulating pressing member.
  • the first pressing member includes the metal pressing member
  • the outer edge portion of the separator can be pressed by the relatively hard metal pressing member. It is possible to effectively suppress the deformation of the outer edge when trying to deform upward.
  • the first pressing member is an insulating pressing member
  • the outer edge portion of the separator can be pressed while securing the insulating property by the first pressing member.
  • the first pressing member includes a metal pressing member, and an insulating pressing member provided between the metal pressing member and one of the electrodes of the cell, and the metal pressing member Openings are provided in the region corresponding to the region in which the cells of the power generation unit are disposed in plan view, both in the insulating pressing member.
  • the insulating pressing member insulates the metal pressing member, and the second pressing member substantially uniformly faces the cell via the first elastic member disposed in the opening. Pressure (sufficient pressure) can be applied.
  • the power generation unit includes a plurality of power generation units stacked, and in plan view, between the plurality of power generation units stacked so as to overlap the cells of the power generation unit. From the member that is disposed between the plurality of power generation units stacked so as not to overlap the second elastic member on the outer peripheral side of the cell in plan view with the second elastic member to be disposed, and from a member harder than the second elastic member And a third pressing member.
  • the load of the plurality of power generation units is applied to the cell via the second elastic member between the plurality of power generation units to be stacked, and the third member is made of a member harder than the second elastic member. Since the deformation of the outer edge when the outer edge of the separator is about to be deformed by the pressing member is suppressed, the increase in the contact resistance between the cell and the separator among the plurality of power generation units is suppressed. be able to.
  • the first elastic member includes a ceramic fiber mat in which ceramic fibers are formed in a mat shape. According to this structure, since the ceramic fiber mat has relatively high heat resistance, substantially uniform surface pressure (sufficient pressure) can be applied to the cell even at relatively high temperature.
  • a first pressing member for pressing the first pressing member and a first pressing member provided separately from the first pressing member for pressing the second pressing member each include a plurality of spring members.
  • the first pressing member and the second pressing member are respectively pressurized by the plurality of spring members, so that the first pressing member and the first pressing member are compared with the case where they are pressurized by one spring member. Tilting of the second pressing member can be suppressed. As a result, the first pressing member and the second pressing member can be pressurized in a stable state.
  • the height position of the second pressing member becomes lower than the height position of the first pressing member due to the thickness becoming smaller due to a change with time or the like of the first elastic member, the height Since the spring member expands and contracts according to the position, the first pressing member and the second pressing member are directly pressurized by one plate-like pressing member provided so as to cover the first pressing member and the second pressing member. Unlike the case, it can be easily suppressed that the second pressing member whose height position is low can not be pressurized.
  • FIG. 1 is an exploded perspective view of a fuel cell according to a first embodiment of the present invention. It is a disassembled perspective view of the electric power generation unit by 1st Embodiment of this invention.
  • FIG. 1 is a schematic cross-sectional view of a fuel cell according to a first embodiment of the present invention.
  • FIG. 1 is a schematic top view of a fuel cell according to a first embodiment of the present invention. It is a typical sectional view of a fuel cell by a comparative example. It is a figure which shows the result of the experiment conducted about ohmic resistance.
  • FIG. 5 is a schematic cross-sectional view of a fuel cell according to a second embodiment of the present invention.
  • FIG. 6 is a schematic top view of a fuel cell according to a first modification of the first embodiment of the present invention.
  • FIG. 5 is a schematic top view of a fuel cell according to a second modification of the first embodiment of the present invention.
  • the configuration of the fuel cell 100 according to the first embodiment will be described with reference to FIGS. 1 to 4.
  • the fuel cell 100 is a solid oxide fuel cell (SOFC). Further, the fuel cell 100 is configured by stacking a plurality of power generation units 10.
  • the power generation unit 10 is configured to flow (crossflow) so that the fuel gas and the air cross each other.
  • the configuration of the power generation unit 10 will be described with reference to FIG. As shown in FIG. 2, in the power generation unit 10, the separator 11, the cell 14, and the insulating unit 15 are stacked in this order from the lower side (the Z2 direction side).
  • the cell 14 includes an anode 14a, a solid electrolyte layer 14b, and a cathode 14c.
  • the cathode 14 c is formed on the surface on the Z1 direction side
  • the anode 14 a is formed on the surface (surface on the Z2 direction side) opposite to the surface on which the cathode 14 c is formed.
  • the anode 14a is provided on substantially the entire surface of the solid electrolyte layer 14b on the Z2 direction side.
  • the cathode 14 c is provided on part of the surface of the solid electrolyte layer 14 b on the Z1 direction side.
  • the cathode 14 c and the anode 14 a are examples of the “one electrode” and the “other electrode” in the claims respectively.
  • the separator 11 includes a current collector plate, a cathode plate, a separator body, and an anode plate stacked in order from the lower side.
  • the anode plate is provided with a flow path of fuel gas.
  • the flow path of air is provided in the cathode plate.
  • a cell holder 17 is provided on the upper surface of the separator 11 so as to surround the outer periphery of the cell 14.
  • the separator 11 is provided with a plurality of openings 11 a through which the fuel gas flows in and out, and a plurality of openings 11 b through which the air gas flows.
  • the insulating portion 15 is also provided with a plurality of openings 15a through which the fuel gas flows in and out, and a plurality of openings 15b through which the air gas flows.
  • the openings for the fuel gas and the openings for the air gas are provided in the separator 11 and the insulating portion 15, respectively.
  • the cell stack 20 is comprised by laminating
  • An end plate 30 is disposed on the top surface of the topmost cell stack 20.
  • the end plate 30 is made of metal. Then, the power generated by the stacked power generation unit 10 is taken out via the metal end plate 30.
  • the first elastic member 40 disposed on the cathode 14 c side of the cell 14 overlaps the cell 14 of the power generation unit 10 in plan view. It is provided. Specifically, the first elastic member 40 is disposed on the upper surface (the Z1 direction side) of the end plate 30.
  • the first elastic member 40 includes the ceramic fiber mat 41 in which the ceramic fibers are formed in a mat shape.
  • the ceramic fiber is made of alumina (aluminum oxide).
  • the ceramic fiber mat 41 has a substantially rectangular shape in plan view.
  • a first pressing plate 50 is provided which is made of a member harder than the first elastic member 40 and presses the outer peripheral side of the cell 14. Specifically, the first pressing plate 50 is disposed on the upper surface (the Z1 direction side) of the end plate 30.
  • the first pressing plate 50 is an example of the “first pressing member” in the claims.
  • the first pressing plate 50 has a frame shape, and in plan view, a region corresponding to the region in which the cells 14 of the power generation unit 10 are disposed (central portion of the frame shape) Is provided with an opening 50a.
  • the first elastic member 40 is disposed in the opening 50a.
  • the first pressing plate 50 is made of metal harder than the first elastic member 40 (for example, SUS: Stainless steel).
  • an insulating insulating plate 51 is provided between the first metal pressing plate 50 and the cathode 14 c of the cell 14.
  • the insulating plate 51 is made of mica (mica) harder than the first elastic member 40, for example.
  • the insulating plate 51 is disposed on the cathode 14 c side of the cell 14 so as not to overlap the first elastic member 40 on the outer peripheral side of the cell 14 in plan view.
  • the insulating plate 51 is an example of the “first pressing member” in the claims.
  • the insulating plate 51 has a frame shape, and in a plan view, the opening 51 a in a region (central portion of the frame shape) corresponding to the region in which the cell 14 of the power generation unit 10 is disposed. Is provided. That is, in both the first pressing plate 50 made of metal and the insulating insulating plate 51, in the area corresponding to the area where the cell 14 of the power generation unit 10 is disposed in plan view, the opening 50a and An opening 51a is provided. Further, the opening 50a and the opening 51a are provided in communication with each other.
  • the first elastic member 40 is disposed on the opposite side (Z1 direction side) of the cell 14 and is made of a member harder than the first elastic member 40.
  • a second pressing plate 52 for pressing the cell 14 via the first elastic member 40 is provided.
  • the second pressing plate 52 has a substantially rectangular shape in a plan view. Further, in plan view, the area (size) of the first elastic member 40 and the size of the second pressing plate 52 are substantially equal. Further, the second pressing plate 52 is made of metal harder than the first elastic member 40 (for example, SUS: Stainless steel).
  • the second pressing plate 52 is an example of the “second pressing member” in the claims.
  • the insulating member 53 is provided between the second pressing plate 52 and the first elastic member 40.
  • the insulating member 53 is made of, for example, mica (mica).
  • the insulating member 53 has a substantially rectangular shape in plan view, and the area (size) of the insulating member 53 and the size of the first elastic member 40 are substantially equal.
  • the first pressing member 60 for pressing the first pressing plate 50 (insulation plate 51) and the first pressing member 60 are provided separately, A second pressure member 61 for pressing the second pressure plate 52 is provided.
  • the first pressure member 60 includes a plurality of (four) spring members 60a formed of ceramic.
  • the plurality of (four) spring members 60a are configured to press the four corners of the frame-shaped first pressing plate 50 (insulation plate 51).
  • the second pressure member 61 includes a plurality of (five) spring members 61 a formed of ceramic.
  • the plurality of (five) spring members 61 a press the four corners of the substantially rectangular second pressing plate 52 and the vicinity of the central portion.
  • the first pressing plate 50 is provided with a recess 50 b in which the spring member 60 a is disposed.
  • the second pressing plate 52 is provided with a recess 52 a in which the spring member 61 a is disposed.
  • a spring pressing plate 62 for pressing the first pressing member 60 and the second pressing member 61 is disposed above the first pressing member 60 and the second pressing member 61 (Z1 direction side). ing.
  • the spring pressing plate 62 is provided with a plurality of through holes 62 a into which the plurality of rod-like members 63 are inserted.
  • the lower end of the rod member 63 is configured to be fixed to a rigid plate or the like (not shown). Then, the plurality of rod-like members 63 are inserted into the through holes 62a of the spring pressing plate 62, the lower end is fixed, and the nut 64 is fastened to the upper end, whereby the spring pressing plate 62 is pressed downward. Ru.
  • the spring member 60a and the spring member 61a are pressed, and the outer peripheral side (outer edge portion of the separator 11) of the cell 14 via the first pressing plate 50 (insulation plate 51) and the second pressing plate 52, And, the cell 14 is pressed.
  • the second elastic member 70 disposed between the stacked cell stacks 20 (the plurality of power generation units 10) is provided so as to overlap the cells 14 of the power generation unit 10 in a plan view.
  • the second elastic member 70 has a substantially rectangular shape in a plan view.
  • the second elastic member 70 also includes a ceramic fiber mat 71.
  • the second elastic member 70 is an example of the “inter-unit elastic member” in the claims.
  • an intermediate plate 80 made of a member is provided. Further, the intermediate plate 80 is made of metal harder than the second elastic member 70 (for example, stainless steel (SUS: stainless steel)).
  • SUS stainless steel
  • an opening 80a is provided in a region corresponding to the region in which the cell 14 of the power generation unit 10 is disposed in plan view.
  • the intermediate plate 80 has a frame shape, and the second elastic member 70 is disposed in the opening 80 a of the frame-shaped intermediate plate 80.
  • the intermediate plate 80 is provided with a plurality of openings 80 b through which the fuel gas flows in and out, and a plurality of openings 80 c through which the air gas flows.
  • the intermediate plate 80 is an example of the “third pressing member” and the “inter-unit pressing member” in the claims.
  • an insulating intermediate insulating plate 81 is provided between the intermediate plate 80 and the cell stack 20 disposed below.
  • the intermediate insulating plate 81 is made of mica (mica) harder than the second elastic member 70, for example.
  • the intermediate insulating plate 81 has a frame shape, and the second elastic member 70 is disposed in the opening 81 a of the frame-shaped intermediate insulating plate 81. That is, the opening 80a of the intermediate plate 80 and the opening 81a of the intermediate insulating plate 81 are communicated with each other, and the second elastic member 70 is disposed so as to straddle the opening 80a and the opening 81a. It is done.
  • the intermediate insulating plate 81 is provided with a plurality of openings 81 b through which the fuel gas flows in and out, and a plurality of openings 81 c through which the air gas flows.
  • the intermediate insulating plate 81 is an example of the “third pressing member” in the claims.
  • the insulating plate 82 disposed between the power generation unit 10 and the second elastic member 70 and the intermediate plate 80 and pressing the second elastic member 70 and the intermediate plate 80 is provided. . Specifically, the insulating plate 82 is disposed above the intermediate plate 80.
  • the insulating plate 82 is made of, for example, mica (mica).
  • the insulating plate 82 is provided with a plurality of openings 82a through which the fuel gas flows in and out, and a plurality of openings 82b through which the air gas flows.
  • the insulating plate 82 is an example of the “inter-unit pressing member” in the claims.
  • a set of the second elastic member 70, the intermediate plate 80, the intermediate insulating plate 81, and the insulating plate 82 is disposed at a plurality of locations (between the cell stacks 20).
  • an insulating plate 83 made of mica (mica) is disposed below the lowermost cell stack 20.
  • an insulating plate 251 made of mica (mica) is provided on the upper surface of the end plate 30. Further, on the upper surface of the insulating plate 251, a metal (SUS) pressing plate 250 is provided. Unlike the first embodiment, the insulating plate 251 and the pressing plate 250 have no opening. The pressing plate 250 and the insulating plate 251 are configured to be pressed by a pressing member (spring member) not shown.
  • the ohmic resistances real component and imaginary component of impedance
  • the opening portion is not provided in the insulating plate 251 and the pressing plate 250 unlike the first embodiment, and therefore the outer edge portion and the center portion can not be pressurized separately.
  • the separator 11 when the separator 11 is curved, the outer edge portion of the separator 11 is sufficiently pressurized, but it is considered that the central portion where the cell 14 is disposed can not be sufficiently pressurized. As a result, it is considered that the ohmic resistance is increased. On the other hand, in the fuel cell 100 of the first embodiment, it was confirmed that the ohmic resistance (contact resistance between the cell 14 and the separator 11) does not increase even after the thermal cycle is repeated.
  • the second elastic member 70 disposed between the plurality of power generation units 10 stacked so as to overlap the cells 14 of the power generation unit 10;
  • the intermediate plate 80 is disposed between the plurality of stacked power generation units 10 and does not overlap the second elastic member 70 on the outer peripheral side of the cell 14 and is made of a member harder than the second elastic member 70.
  • the second elastic member 70 and the intermediate plate 80 made of a member harder than the second elastic member 70 are disposed between the plurality of power generation units 10 to be stacked, the plurality of power generation units 10 to be stacked are A sufficient load can be applied to the power generation unit 10 disposed below. Since the contact failure between the cell 14 and the separator 11 is suppressed by these, it can suppress that the contact resistance between the cell 14 and the separator 11 becomes large.
  • the insulating plate 82 disposed between the power generation unit 10 and the second elastic member 70 and the intermediate plate 80 and pressing the second elastic member 70 and the intermediate plate 80. Further comprising thus, the second elastic member 70 and the intermediate plate 80 can be pressurized via the insulating plate 82 by the weight of the power generation unit 10.
  • the opening 80 a is provided in the intermediate plate 80 in a region corresponding to the region in which the cell 14 of the power generation unit 10 is disposed in plan view.
  • the elastic member 70 is disposed in the opening 80a.
  • the outer edge portion of the separator 11 (the portion of the separator 11 disposed outside the cell 14 in plan view) is pressed by the intermediate plate 80 provided so as to surround the opening 80 a. It is possible to further suppress the deformation of the outer edge portion when the portion is deformed upward.
  • the intermediate plate 80 has a frame shape in which the opening 80 a is provided at the center.
  • the entire periphery of the outer edge portion of the separator 11 is pressed by the frame-shaped intermediate plate 80, so that deformation of the outer edge portion can be further suppressed when the outer edge portion of the separator 11 tries to deform upward. .
  • the metal intermediate plate 80 is provided.
  • the outer edge portion of the separator 11 can be pressed by the relatively hard metal intermediate plate 80, so that deformation of the outer edge portion when the outer edge portion of the separator 11 tries to be deformed upward is effectively suppressed. can do.
  • the second elastic member 70 includes the ceramic fiber mat 71 in which the ceramic fibers are formed in a mat shape.
  • the ceramic fiber mat 71 has relatively high heat resistance, substantially uniform surface pressure (sufficient pressure) can be applied to the cell 14 even under relatively high temperature.
  • the first elastic member 40 disposed on the cathode 14 c side of the cell 14 does not overlap the first elastic member 40 on the outer peripheral side of the cell 14 in plan view.
  • the first pressing plate 50 and the insulating plate 51 which are disposed on the cathode 14 c side of the cell 14 and which are harder than the first elastic member 40 and press the outer peripheral side of the cell 14 and the cells of the first elastic member 40
  • a second pressing plate 52 is disposed on the side opposite to the first member 14 and made of a member harder than the first elastic member 40 and pressing the cell 14 via the first elastic member 40.
  • the separator 11 end plate 30 holding the cell 14 is deformed so as to be depressed downward, the lower portion of the first elastic member 40 is elastically deformed so as to follow the depression. Since the upper surface of the first elastic member 40 is substantially flat, the cell 14 and the second pressing plate 52 via the first elastic member 40 make the cell 14 and the central portion of the separator 11 in which the cell 14 is disposed substantially uniform surface pressure (Sufficient pressure) can be applied.
  • the separator 11 larger than the cell 14 in plan view Even when the outer edge portion of the (a portion of the separator 11 disposed outside the cell 14 in plan view) tries to deform upward, the deformation of the outer edge portion is disposed on the cathode 14 c side (upper side) of the cell 14
  • the surface pressure of the first pressing plate 50 and the insulating plate 51 made of a member harder than the first elastic member 40 can suppress this. Since the contact failure between the cell 14 and the separator 11 is suppressed by these, it can suppress that the contact resistance between the cell 14 and the separator 11 becomes large.
  • the lower portion of the first elastic member 40 elastically deforms along the concave, and the upper surface of the first elastic member 40 is substantially flat. Therefore, a substantially uniform surface pressure (sufficient pressure) can be applied to the cell 14 by the second pressing plate 52 through the first elastic member 40. Also by this, it can be suppressed that the contact resistance between the cell 14 and the separator 11 becomes large.
  • the first pressing member 60 for pressing the first pressing plate 50 and the insulating plate 51 and the first pressing member 60 are separately provided, and the second pressing plate is provided. And a second pressing member 61 for pressing 52.
  • the height position of the second pressing plate 52 is smaller than the height positions of the first pressing plate 50 and the insulating plate 51 due to the thickness of the first elastic member 40 becoming smaller due to changes over time or the like.
  • the first pressing plate 50 (insulating plate 51) is directly provided by one plate-shaped pressing member provided so as to cover the first pressing plate 50 (insulating plate 51) and the second pressing plate 52.
  • the second pressing plate 52 whose height position is low can be prevented from being unable to be pressurized.
  • the first pressing plate 50 and the insulating plate 51 each have the opening 50a in a region corresponding to the region in which the cell 14 of the power generation unit 10 is disposed in plan view. And the opening 51a is provided, and the first elastic member 40 is disposed in the opening 50a and the opening 51a.
  • the outer edge portion of the separator 11 portion of the separator 11 disposed outside the cell 14 in plan view
  • the first pressing plate 50 and the insulating plate 51 provided so as to surround the opening 50 a and the opening 51 a Because the outer edge portion of the separator 11 tries to be deformed upward, the deformation of the outer edge portion can be further suppressed.
  • each of the first pressing plate 50 and the insulating plate 51 has a frame shape in which the opening 50a and the opening 51a are provided in the center.
  • the entire periphery of the outer edge portion of the separator 11 is pressed by the frame-shaped first pressing plate 50 and the insulating plate 51, so deformation of the outer edge portion when the outer edge portion of the separator 11 tries to deform upward It can be further suppressed.
  • the insulating member 53 disposed between the second pressing plate 52 and the first elastic member 40 is provided.
  • the second pressing plate 52 made of metal can be insulated by the insulating member 53.
  • the metal first pressing plate 50 is provided.
  • the outer edge portion of the separator 11 can be pressed by the first hard pressing plate 50 made of a relatively hard metal, so deformation of the outer edge portion in the case where the outer edge portion of the separator 11 tries to deform upward is effective. Can be suppressed.
  • the first pressing plate 50 made of metal and the insulating insulating plate 51 provided between the first pressing plate 50 made of metal and the cathode 14 c of the cell 14 Provide Then, in both of the first pressing plate 50 made of metal and the insulating insulating plate 51, the opening 50a and the opening in a region corresponding to the region in which the cell 14 of the power generation unit 10 is disposed in plan view The part 51a is provided.
  • the first pressing plate 50 made of metal is insulated by the insulating insulating plate 51, and the second pressing plate 52 is interposed through the first elastic member 40 disposed in the opening 50a and the opening 51a. As a result, substantially uniform surface pressure (sufficient pressure) can be applied to the cell 14.
  • the power generation unit 10 includes the plurality of power generation units 10 to be stacked. Then, the second elastic member 70 disposed between the plurality of power generation units 10 stacked so as to overlap the cells 14 of the power generation unit 10 in plan view, and the second elastic member 70 in the outer peripheral side of the cells 14 in plan view An intermediate plate 80 and an intermediate insulating plate 81, which are disposed between the plurality of power generation units 10 to be stacked and do not overlap with the elastic member 70 and are made of members harder than the second elastic member 70, are provided.
  • the load of the plurality of power generation units 10 is applied to the cell 14 via the second elastic member 70 among the plurality of power generation units 10 to be stacked, and the intermediate made of a member harder than the second elastic member 70 Since deformation of the outer edge of the outer edge of the separator 11 is to be deformed upward by the plate 80 and the intermediate insulating plate 81, deformation of the outer edge is suppressed. It can suppress that contact resistance becomes large.
  • the first elastic member 40 includes the ceramic fiber mat 41 in which the ceramic fibers are formed in a mat shape.
  • the first pressure member 60 and the second pressure member 61 include the plurality of spring members 60a and 61a, respectively.
  • the first pressing plate 50 (insulation plate 51) and the second pressing plate 52 are respectively pressurized by the plurality of spring members 60a and 61a, they are pressurized by one spring member 60a and 61a.
  • the first pressing plate 50 (insulation plate 51) and the second pressing plate 52 are inclined, it can be suppressed.
  • the first pressing plate 50 (the insulating plate 51) and the second pressing plate 52 can be pressurized in a stable state.
  • the height position of the second pressing plate 52 is lower than the height positions of the first pressing plate 50 and the insulating plate 51 due to the thickness of the first elastic member 40 becoming smaller due to a change with time or the like.
  • the spring members 60a and 61a expand and contract according to the height position, so that one plate-like pressure is provided to cover the first pressing plate 50 (insulation plate 51) and the second pressing plate 52.
  • the second pressing plate 52 having a low height position can be easily restrained from being unable to be pressurized. Can.
  • the configuration of the fuel cell 110 according to the second embodiment will be described with reference to FIG.
  • the fuel cell 110 according to the second embodiment is different from the fuel cell 110 according to the first embodiment in which both the first pressing plate 50 and the insulating plate 51 are disposed on the upper surface of the end plate 30, only the insulating plate 151 is disposed. There is.
  • a first pressing plate 151 made of mica (mica) is disposed on the upper surface of the end plate 30.
  • the first pressing plate 151 is formed in a frame shape in a plan view, and an opening 151 a is provided at the center.
  • the first elastic member 40 is disposed in the opening 151a.
  • a second pressing plate 152 made of mica (mica) is disposed on the upper surface of the first elastic member 40.
  • the first pressing plate 151 and the second pressing plate 152 are examples of the “first pressing member” and the “second pressing member” in the present invention, respectively.
  • the remaining structure of the second embodiment is similar to that of the aforementioned first embodiment.
  • the insulating plate 82 is provided without providing the metal plate. Thereby, the outer edge portion of the separator 11 can be pressed while securing insulation by the insulating plate 82.
  • the fuel cell is an example of a solid oxide fuel cell (SOFC), but the present invention is not limited thereto.
  • the fuel cell is a fuel cell other than a solid oxide fuel cell, a polymer electrolyte fuel cell (PEFC: Polymer Electrolyte Fuel Cell), a phosphoric acid fuel cell (PAFC: Phosphoric Acid Fuel Cell), a molten carbonate It may be a salt fuel cell (MCFC: Molten Carbonate Fuel Cell) or the like.
  • PEFC Polymer electrolyte Fuel Cell
  • PAFC Phosphoric Acid Fuel Cell
  • MCFC Molten Carbonate Fuel Cell
  • the pressing plate and the insulating plate have the frame shape, but the present invention is not limited to this.
  • the first pressing plate 160 and the insulating plate 161 have a U shape in plan view, and the U-shaped first pressing plate
  • the first elastic member 162, the insulating member 163, and the second pressing plate 164 may be disposed inside the 160 and the insulating plate 161.
  • the first pressing plate 160 and the insulating plate 161 are examples of the “first pressing member” in the claims.
  • the second pressing plate 164 is an example of the “second pressing member” in the claims.
  • the first elastic member 172, the insulating member 173, and the second pressing plate 174 are disposed at the central portion in a plan view.
  • a substantially rectangular first pressing plate 170 and an insulating plate 171 may be disposed on both sides of the insulating member 173 and the second pressing plate 174.
  • the first pressing plate 170 and the insulating plate 171 are examples of the “first pressing member” in the claims.
  • the second pressing plate 174 is an example of the “second pressing member” in the claims.
  • the 1st pressurization member and the 2nd pressurization member showed the example containing a some spring member, respectively, this invention is not limited to this.
  • the first pressure member and the second pressure member may be pressure members (pressure by gas, oil pressure, etc.) other than the spring member.
  • the 1st elastic member and the 2nd elastic member showed the example containing a ceramic fiber mat and a ceramic fiber sheet in said 1st and 2nd embodiment, this invention is not limited to this.
  • the first elastic member may be made of only one of the ceramic fiber mat and the ceramic fiber sheet.
  • the first elastic member and the second elastic member are made of ceramic fiber mats (sheets) made of alumina, but the present invention is not limited thereto. Absent.
  • a ceramic fiber mat (sheet) composed of members other than alumina may be used as the first elastic member.
  • the intermediate plate is made of metal (for example, SUS) harder than the second elastic member.
  • the present invention is not limited to this.
  • the intermediate plate may be made of an insulating member that is harder than the second elastic member.
  • the outer edge portion of the separator can be pressed while securing insulation by the intermediate plate.
  • the fuel cell power generation unit
  • the fuel cell is configured to flow so that the fuel gas and the air cross (cross flow)
  • the present invention It is not restricted to this.
  • the present invention can be applied to a fuel cell in which fuel gas and air flow in opposite directions (counter flow).

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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)
PCT/JP2016/073302 2015-08-10 2016-08-08 燃料電池 WO2017026447A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2017534445A JP6359775B2 (ja) 2015-08-10 2016-08-08 燃料電池
DE112016003661.2T DE112016003661T5 (de) 2015-08-10 2016-08-08 Brennstoffzelle
CN201680045826.7A CN107851829A (zh) 2015-08-10 2016-08-08 燃料电池
KR1020187002874A KR20180034454A (ko) 2015-08-10 2016-08-08 연료 전지

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JP2015157887 2015-08-10

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JP2001167745A (ja) * 1999-12-08 2001-06-22 Power System:Kk セル積層構造の加圧構造
JP2002246062A (ja) * 2001-02-15 2002-08-30 Asia Pacific Fuel Cell Technology Ltd 均一加圧装置付き燃料電池
JP2002343376A (ja) * 2001-05-14 2002-11-29 Tokyo Gas Co Ltd 平板形固体酸化物燃料電池の積層構造
JP2007317490A (ja) * 2006-05-25 2007-12-06 Ngk Spark Plug Co Ltd 固体電解質形燃料電池スタック
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CN114867593B (zh) * 2020-02-13 2023-12-22 株式会社Lg新能源 按压二次电池的设备和方法

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DE112016003661T5 (de) 2018-05-09
JP6359775B2 (ja) 2018-07-18
JPWO2017026447A1 (ja) 2018-06-07
KR20180034454A (ko) 2018-04-04

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