WO2018131330A1 - Fuel cell - Google Patents
Fuel cell Download PDFInfo
- Publication number
- WO2018131330A1 WO2018131330A1 PCT/JP2017/043665 JP2017043665W WO2018131330A1 WO 2018131330 A1 WO2018131330 A1 WO 2018131330A1 JP 2017043665 W JP2017043665 W JP 2017043665W WO 2018131330 A1 WO2018131330 A1 WO 2018131330A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fastening
- cell stack
- fastening portion
- plate member
- fuel cell
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/248—Means for compression of the fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- This invention relates to a fuel cell.
- the fuel cell described in Japanese Patent Application Laid-Open No. 2009-54415 includes a fuel cell stack in which a plurality of power generation cells are stacked, a housing that houses the fuel cell stack, an upper end portion and / or a side portion of the fuel cell stack. And a fixing member to be fixed.
- the fixing member is made of foamed polystyrene, and is burned down when the fuel cell is used. Thereby, when the fuel cell is assembled and then transported, the fixing member prevents the power generation cell from being laterally displaced and falling off. In addition, since the fixing member is burned off when the fuel cell is used, it is suppressed that the fixing member becomes a factor that hinders the power generation operation.
- the fuel cell described in JP 2009-245622 A includes a fuel cell stack in which a plurality of power generation cells are stacked, a weight disposed above the fuel cell stack, and a housing that houses the fuel cell stack. ing.
- This fuel cell includes a support plate provided above a housing (weight) and a spring (coil spring) provided between the support plate and the weight.
- the spring has a spring function (spring function) at a normal temperature and is configured so that the spring function is lost due to a rise in temperature in the housing when the fuel cell is used. Thereby, when the fuel cell is transported (at normal temperature), the spring has a spring function, so that the power generation cell is prevented from being laterally displaced and dropped during transportation.
- the spring function is lost due to a rise in the temperature in the housing, so that only the weight is applied to the fuel cell stack, and excessive power is applied to the fuel cell stack. Is inhibited from being inhibited.
- the spring is made of, for example, iron, and is configured such that the spring is oxidized due to a temperature rise in the housing during use and the spring function is lost.
- the spring is made of a synthetic resin, and is configured such that the spring melts due to a temperature rise in the housing during use and the spring function is lost.
- the present invention has been made to solve the above-described problems, and one object of the present invention is to provide a fuel cell that can be re-transported after use without providing a new fastening member. It is to be.
- a fuel cell includes a cell stack in which a plurality of cells are stacked, and an upper plate provided on each of an upper surface side and a lower surface side of the cell stack so as to sandwich the cell stack.
- the upper plate member and the lower plate member are fastened together with the cell-like member and the lower plate-like member sandwiched between the cell stacks, and a plurality of cells are stacked in the stacking direction with respect to the cell stack by the tensile force accompanying the fastening.
- the upper plate member and the lower plate member for applying pressure are fixed, and a fastening member that expands and expands in the stacking direction more than the cell stack as the temperature rises is provided. It has a locking part that reduces the force or releases the tensile force.
- the fastening member includes a fastening member that expands and expands more in the stacking direction than the cell stack as the temperature rises, and the fastening member reduces the tensile force by stretching or It has a locking part that releases the tensile force.
- the cell stack and the fastening member expand (elongate) in the stacking direction of the plurality of cells due to the temperature rise during use. Then, the upper plate member and the lower plate member are separated from each other by extension of the fastening member.
- the fastening member has a locking portion that reduces or releases the tensile force by extension, so that the tensile force is reduced or pulled by extension of the fastening member at a high temperature such as in use. Since the force is released, peeling of the sealing portion of the cell caused by the upper plate member and the lower plate member being separated from each other is suppressed.
- a plurality of cell stacks are provided, and an upper plate member, a lower plate member, and a fastening member are provided for each cell stack. If comprised in this way, since a cell stack is fixed by a fastening member for every cell stack, the lateral shift
- a plurality of cell stacks are fixed by one fastening member, it is necessary to fix the plurality of cell stacks with a relatively large tensile force in order to suppress the lateral displacement of the cells. For this reason, an excessive force may be applied to a plurality of cell stacks (cells). Therefore, by providing the upper plate member, the lower plate member, and the fastening member for each cell stack, it is possible to suppress an excessive force from being applied to the plurality of cell stacks (cells).
- the fastening member includes a first fastening portion attached to the lower plate-like member, a second fastening portion attached to the upper plate-like member, a first fastening portion, and a second fastening.
- a portion is inserted, and includes a connection portion that connects the first fastening portion and the second fastening portion and has a locking portion, and one of the first fastening portion and the second fastening portion is fastened to the connection portion.
- the upper plate member and the lower plate member are fixed by a tensile force while sandwiching the cell stack by being clamped to the lower plate member or the upper plate member, and the first fastening portion and the second fastening portion At least the other of the fastening portions is configured to be able to release the locked state of the connecting portion with respect to the locking portion. If comprised in this way, since at least the other of a 1st fastening part and a 2nd fastening part is comprised so that the latching state with respect to the latching
- the upper surface side and the lower surface side of the cell stack have different potentials (for example, positive potential or negative potential).
- the upper surface side and the lower surface side of the cell stack may be electrically connected (short-circuited). Therefore, in the present invention, by providing the insulating member, it is possible to suppress conduction (short circuit) between the upper surface side and the lower surface side of the cell stack.
- the fastening member includes the first fastening part and the second fastening part
- one of the first fastening part and the second fastening part is fastened to the connection part
- the other of the 1st fastening part and the 2nd fastening part is constituted so that the locked state to the locking part of a connection part can be canceled. If comprised in this way, the latching state with respect to the latching
- the fastening member includes the first fastening portion and the second fastening portion
- the first fastening portion is fastened to the lower plate-like member
- the second fastening portion is fastened to the upper plate-like member.
- the cell stack is fixed between the upper plate member and the lower plate member, and both the first fastening portion and the second fastening portion are engaged with the locking portion of the connection portion.
- the stop state can be released. If comprised in this way, when a 1st fastening part and a 2nd fastening part extend
- both the first fastening portion and the second fastening portion have a substantially columnar shape. If comprised in this way, unlike the case where a 1st fastening part and a 2nd fastening part are comprised by a spring etc., since the mechanical strength of a 1st fastening part and a 2nd fastening part is comparatively high, a fuel cell at the time of conveyance Even when is moved in the vertical direction (when pushed up), deformation of the first fastening portion and the second fastening portion is suppressed. Thereby, it can suppress that a cell shifts
- the connecting portion has a substantially cylindrical shape, a substantially U-shape, or a substantially ring shape
- the two fastening portions are inserted into the connection portion from one end side and the other end side of the connection portion having a substantially cylindrical shape, a substantially U shape, or a substantially ring shape, respectively.
- the connection portion has a substantially cylindrical shape
- one of the first fastening portion and the second fastening portion is easily fastened to the connection portion by gripping and rotating the connection portion having the substantially cylindrical shape. be able to.
- connection portion has a substantially U shape or a substantially ring shape
- first fastening portion and the second fastening portion inserted through the connection portion are exposed, so that the tightening operation for the first fastening portion and the second fastening portion is performed. It can be done easily.
- the one-side power extraction unit and the other-side electrode extraction unit that are provided on the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, respectively, and extract electric power from the cell stack
- the upper plate member and the lower plate member are provided separately from the one-side power extraction portion and the other-side electrode extraction portion. If comprised in this way, it can suppress that the tensile force from a fastening member is directly added to the one side electric power extraction part and the other side electrode extraction part.
- the one-side power extraction portion and the other-side electrode extraction portion that are provided on the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, respectively, and for extracting electric power from the cell stack
- the one-side power extraction portion and the other-side electrode extraction portion also serve as an upper plate member and a lower plate member, respectively. If comprised in this way, since the one side electric power extraction part and the other side electrode extraction part serve as the upper side plate-shaped member and the lower side plate-shaped member, respectively, the number of parts can be reduced.
- a fixing member that fixes the upper pressing member and the lower pressing member in a state where the stack is sandwiched, and the upper plate member, the lower plate member, and the fastening member include the upper pressing member, the lower pressing member, and the fixing member.
- the fuel cell can be transported again after use without providing a new fastening member.
- 1 is an exploded perspective view of a fuel cell according to a first embodiment of the present invention.
- 1 is a perspective view of a fuel cell according to a first embodiment of the present invention.
- 1 is a perspective view of a cell stack of a fuel cell according to a first embodiment of the present invention. It is a perspective view (sectional view) of the fastening member of the fuel cell according to the first embodiment of the present invention. It is sectional drawing of the fastening member of the fuel cell by 1st Embodiment of this invention. It is a figure which shows the fastening member of the fuel cell by 2nd Embodiment of this invention. It is a figure which shows the fastening member of the fuel cell by 3rd Embodiment of this invention.
- FIG. 6 is a view showing a fuel cell according to a modification of the first to fourth embodiments of the present invention.
- the configuration of the fuel cell 100 according to the first embodiment will be described with reference to FIGS.
- the fuel cell 100 is, for example, a solid oxide fuel cell (SOFC).
- SOFC solid oxide fuel cell
- the fuel cell 100 is configured by stacking a plurality of cell units 10.
- the cell unit 10 is configured to flow so that the fuel gas and the air intersect (cross flow).
- the cell unit 10 includes a cell 11.
- the cell 11 includes a cathode 11a, a solid electrolyte layer 11b, and an anode 11c.
- the cell unit 10 includes a cathode / anode plate 12.
- the cell 11 is arranged on the upper surface (fuel gas flow path 12 c) of the cathode / anode plate 12.
- the cathode / anode plate 12 has an opening 12a (121a) for the fuel gas to flow into the fuel gas flow path 12c and an opening 12a (121b) for the fuel gas to flow out of the fuel gas flow path 12c. And are provided.
- the cathode / anode plate 12 is provided with a plurality of openings 12b through which air gas flows.
- the fuel gas channel 12c is configured to communicate with the opening 12a.
- the cell unit 10 includes a cell presser 13 and a cell holder ring 14.
- the cell retainer 13 and the cell holder ring 14 are arranged below the cathode / anode plate 12 (Z2 direction side).
- the cell retainer 13 is provided with a plurality of openings 13a through which fuel gas flows in and out and a plurality of openings 13b through which air gas flows.
- the cell retainer 13 is provided with an opening 13c in which the cell 11 of the lower cell unit 10 is disposed.
- the cell holder ring 14 is provided with a plurality of openings 14a through which fuel gas flows in and out and a plurality of openings 14b through which air gas flows.
- the cell holder ring 14 is provided with an opening 14c in which the cell 11 of the lower cell unit 10 is disposed.
- the cell stack 20 is configured by stacking a plurality of cell units 10. In addition, as shown in FIG. 2, a plurality of cell stacks 20 are provided in the fuel cell 100. The plurality of cell stacks 20 are provided in the fuel cell 100 in a stacked state.
- a cathode plate 31 is provided above the cell stack 20.
- the cathode plate 31 has a function of taking out the electric power generated by the cell stack 20 (the plurality of cell units 10).
- the cathode plate 31 is provided with a plurality of openings 31a through which fuel gas flows in and out and a plurality of openings 31b through which air gas flows.
- an air gas passage 31c communicating with the opening 31b is provided on the back surface side (Z2 direction side) of the cathode plate 31. Further, the air gas flow path 31 c contacts the cathode 11 a of the cell 11 (not shown) exposed on the upper surface of the cell stack 20.
- the cathode plate 31 is an example of the “one side power extraction portion” in the claims.
- an insulating plate 32 is provided above the cathode plate 31.
- the insulating plate 32 is made of mica (mica), for example.
- the insulating plate 32 is provided with a plurality of openings 32a through which fuel gas flows in and out and a plurality of openings 32b through which air gas flows.
- the insulating plate 32 is provided with an opening 32c in which a ceramic mat 37 described later is disposed.
- an anode plate 33 is provided below the cell stack 20.
- the anode plate 33 has a function of taking out the electric power generated by the cell stack 20 (the plurality of cell units 10).
- the anode plate 33 has a fuel gas passage 33c in which the cells 11 are disposed, an opening 33a (331a) for allowing the fuel gas to flow into the fuel gas passage 33c, and the fuel gas from the fuel gas passage 33c.
- An opening 33a (331b) for flowing out is provided.
- the anode plate 33 is provided with a plurality of openings 33b through which air gas flows. Further, the fuel gas flow path 33c is configured to communicate with the opening 33a.
- the anode plate 33 is an example of the “other-side power extraction unit” in the claims.
- an insulating plate 34 is provided below the anode plate 33.
- the insulating plate 34 is made of mica (mica), for example.
- the insulating plate 34 is provided with a plurality of openings 34a through which fuel gas flows in and out and a plurality of openings 34b through which air gas flows.
- the cathode / anode plate 12, the cathode plate 31, and the anode plate 33 are made of, for example, ferrite SUS430 (stainless steel 430).
- an upper plate member 35 and a lower plate member 36 are respectively provided on the upper surface side and the lower surface side of the cell stack 20 so as to sandwich the cell stack 20.
- the upper plate member 35 is made of, for example, ferrite SUS430.
- the upper plate member 35 is provided with a plurality of openings 35a through which fuel gas flows in and out and a plurality of openings 35b through which air gas flows.
- the upper plate member 35 is provided with an opening 35c in which the ceramic mat 37 is disposed.
- the lower plate member 36 is made of, for example, ferrite SUS430.
- the lower plate-like member 36 is provided with a plurality of openings 36a through which fuel gas flows in and out and a plurality of openings 36b through which air gas flows.
- the upper plate member 35 and the lower plate member 36 are provided separately from the cathode plate 31 and the anode plate 33. Specifically, the upper plate member 35 is stacked above the cathode plate 31, and the lower plate member 36 is stacked below the anode plate 33.
- the upper plate member 35 and the lower plate member 36 are fastened together with the cell stack 20 sandwiched therebetween, and the cell stack 20 is pulled by a tensile force accompanying the fastening.
- the upper plate member 35 and the lower plate member 36 that apply pressure in the stacking direction of the plurality of cell units 10 are fixed, and expand and expand more in the stacking direction than the cell stack 20 as the temperature rises.
- a fastening member 40 is provided.
- the fastening member 40 is made of, for example, austenitic SUS310 (stainless steel 310).
- the austenite SUS310 has a larger expansion (elongation) with respect to temperature rise than the cathode / anode plate 12 made of ferrite SUS430. Accordingly, the degree of expansion (extension in the stacking direction of the cell units 10) with respect to the temperature rise of the fastening member 40 is the degree of expansion (extension in the stacking direction of the cell units 10) with respect to the temperature rise of the cell stack 20 (cell unit 10). Bigger than.
- the fastening member 40 has the inner surface 43c which reduces a tension
- the cell stack 20 has a structure capable of absorbing the extended portion with respect to the temperature rise during use (power generation). For example, the temperature when the cell stack 20 is used (power generation) is about 750 ° C.
- the inner side surface 43c is an example of the “locking portion” in the claims. The detailed configuration of the fastening member 40 will be described later.
- the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided for each cell stack 20.
- the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided for each cell stack 20.
- the six cell stacks 20 are provided in the fuel cell 100.
- Each of the six cell stacks 20 is provided with an upper plate member 35, a lower plate member 36, and a fastening member 40.
- a plurality of fastening members 40 are provided for one cell stack 20 (four in the first embodiment, see FIG. 1).
- the four fastening members 40 are provided at the four corners of the substantially rectangular upper plate member 35 (lower plate member 36).
- a ceramic mat 37 is disposed above the stacked cell stacks 20.
- the ceramic mat 37 is disposed inside the opening 35 a of the upper plate member 35.
- a top plate 38 is disposed above the ceramic mat 37 (upper plate member 35).
- a ceramic mat 39 is disposed above the top plate 38.
- an upper pressing member 51 and a lower pressing member 52 are provided on the upper surface side (above the top plate 38) and the lower surface side of the cell stack 20, respectively.
- a tie rod 53 that fixes the upper pressing member 51 and the lower pressing member 52 in a state where the cell stack 20 is sandwiched is provided.
- the upper end side of the tie rod 53 is fixed to the upper pressing member 51 by the nut 54, and the lower end side of the tie rod 53 is fixed to the lower pressing member 52 by the nut 54, whereby the cell unit 10 is pressed (pressurized) from above and below. Is done.
- the tie rod 53 is an example of the “fixing member” in the claims.
- the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided separately from the upper pressing member 51, the lower pressing member 52, and the tie rod 53. That is, the pressure against the cell stack 20 when the fuel cell 100 is in use (during operation and high temperature) is performed by the upper pressing member 51, the lower pressing member 52, and the tie rod 53. On the other hand, the pressure on the cell stack 20 during the transportation of the fuel cell 100 (at room temperature) is performed by the upper plate member 35, the lower plate member 36, and the fastening member 40.
- the fastening member 40 includes a first fastening portion 41 attached to the lower plate member 36, a second fastening portion 42 attached to the upper plate member 35, The fastening portion 41 and the second fastening portion 42 are inserted, and include a connection portion 43 that connects the first fastening portion 41 and the second fastening portion 42.
- the 1st fastening part 41, the 2nd fastening part 42, and the connection part 43 are comprised by SUS310, for example.
- a nut 44 and a nut 44a described later are also formed of SUS310.
- the first fastening portion 41 has a substantially columnar shape. Specifically, threads are provided on the upper end side (Z1 direction side) and the lower end side (Z2 direction side) of the first fastening portion 41, respectively.
- the lower end side of the first fastening portion 41 is fastened (screwed) to the screw fastening hole 36 c of the lower plate-like member 36.
- a nut 44 is provided on the lower end side of the first fastening portion 41, and the lower end side of the first fastening portion 41 is fixed to the lower plate member 36 by the nut 44.
- the upper end side of the first fastening portion 41 is fastened (screwed) to the connection portion 43.
- a nut 44 is provided on the upper end side of the first fastening portion 41, and the upper end side of the first fastening portion 41 is fixed to the connection portion 43 by the nut 44.
- the second fastening portion 42 has a substantially columnar shape. Specifically, the second fastening portion 42 has a bolt shape.
- a screw thread is provided on the upper end side (Z1 direction side) of the second fastening portion 42.
- the upper end side of the second fastening portion 42 is fastened (screwed) to the screw fastening hole 35 d of the upper plate member 35.
- a nut 44 is provided on the upper end side of the second fastening portion 42, and the upper end side of the second fastening portion 42 is fixed to the upper plate member 35 by the nut 44.
- the lower end side of the second fastening portion 42 (Z2 direction side, the bolt head portion 42 a portion) is disposed inside the connection portion 43.
- the diameter of the head portion 42a of the second fastening portion 42 is larger than the hole 43a of the connection portion 43 through which the second fastening portion 42 is inserted. As a result, the second fastening portion 42 is prevented from slipping upward from the connection portion 43 by the head portion 42 a of the second fastening portion 42.
- connection portion 43 has a substantially cylindrical shape. And the 1st fastening part 41 and the 2nd fastening part 42 are penetrated by the connection part 43 from the one end side and the other end side of the connection part 43 which respectively have a substantially cylindrical shape. Specifically, a nut 44 a is welded to the lower end of the connection portion 43. The upper end side of the first fastening portion 41 is fastened (screwed) to the nut 44 a and the hole 43 b of the connection portion 43.
- the upper plate member 35 and the lower plate member 36 are fixed by a tensile force while sandwiching the cell stack 20. .
- the connection portion 43 having a substantially cylindrical shape
- the upper end side of the first fastening portion 41 is tightened (screwed) into the nut 44 a and the hole 43 b of the connection portion 43.
- the lower end side (the head portion 42 a side) of the second fastening portion 42 is disposed inside the connection portion 43 so as not to be pulled upward from the connection portion 43.
- connection portion 43 having a substantially cylindrical shape By rotating the connection portion 43 having a substantially cylindrical shape, a tensile force acts on the upper plate member 35 and the lower plate member 36 in a direction approaching each other.
- the upper plate member 35 and the lower plate member 36 are fixed by the tensile force of the fastening member 40 with the cell stack 20 interposed therebetween. That is, when the connection portion 43 having a substantially cylindrical shape is rotated, the lower end side (the head portion 42a side) of the second fastening portion 42 is locked by the inner side surface 43c on the Z1 direction side of the connection portion 43, and the upper plate A tensile force acts in a direction approaching each other with respect to the member 35 and the lower plate member 36.
- the second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43 c of the connection portion 43. That is, the second fastening portion 42 is fastened (screwed) to the connection portion 43 only by being inserted through the connection portion 43 with the head portion 42a of the second fastening portion 42 disposed inside the connection portion 43. Not) That is, the cell stack 20 extends with respect to the temperature rise during use, and the locked state of the connection portion 43 with respect to the inner side surface 43c is released.
- the insulating member for insulating the 2nd fastening part 42 and the connection part 43 45 is provided between the 2nd fastening part 42 and the connection part 43.
- the insulating member 45 is made of ceramic, for example.
- the insulating member 45 has a substantially annular shape, and is configured such that the second fastening portion 42 passes through the substantially annular insulating member 45.
- a gap 46 a is provided between the side surface of the insulating member 45 and the inner side surface of the substantially cylindrical connection portion 43.
- a gap 46 b is provided between the head portion 42 a of the second fastening portion 42 and the inner side surface of the substantially cylindrical connecting portion 43.
- the width W1 of the gap 46a along the horizontal direction is smaller than the width W2 of the gap 46b along the horizontal direction.
- the side surface of the insulating member 45 comes into contact with the inner side surface of the connection portion 43 before 42 comes into contact with the inner side surface of the hole 43a. Thereby, the 2nd fastening part 42 and the connection part 43 contact (electricity), and it is prevented that the upper side plate-shaped member 35 and the lower side plate-shaped member 36 short-circuit.
- the second fastening portion 42 extends in the vertical direction (Z direction).
- the cell stack 20 also expands in the vertical direction (Z direction) due to the temperature rise, while the cell stack 20 extends less than the fastening member 40.
- the head portion 42a of the second fastening portion 42 is moved downward (see FIG. 5B). That is, the state in which the head portion 42a of the second fastening portion 42 is locked to the inner side surface 43c is released.
- connection portion 43 is upward (Z1 direction) by the difference between the extension of the first fastening portion 41 and the extension of the cell stack 20. Move to the side (lifted). Further, when the connection portion 43 extends in the vertical direction (Z direction) due to the temperature rise, the connection portion 43 moves upward (Z1 direction) by the difference between the extension of the connection portion 43 and the extension of the cell stack 20. (Lifted). That is, the tensile force is reduced or the tensile force is released by the extension of the connecting portion 43.
- the head portion 42a of the second fastening portion 42 is not fixed to the connection portion 43, even if the first fastening portion 41, the second fastening portion 42, and the connection portion 43 extend, the upper plate-like member The distance between 35 and the lower plate member 36 does not change. Since the cell stack 20 also expands (extends) in the vertical direction due to a temperature rise when the fuel cell 100 is used (during operation), the distance between the upper plate member 35 and the lower plate member 36 accordingly. Will grow. The extension of the fastening member 40 is larger than the extension of the cell stack 20. On the other hand, the extension of the fastening member 40 is absorbed into the connection portion 43. The distance between the upper plate member 35 and the lower plate member 36 is not increased more than the extension. As a result, the seal portion of the cell stack 20 (cell unit 10) is prevented from being peeled off, so that power generation can be performed appropriately.
- the fastening member 40 that expands and expands more in the stacking direction than the cell stack 20 as the temperature rises is provided, and the fastening member 40 reduces the tensile force or the tensile force by stretching.
- An inner side surface 43c for releasing the cell stack 20 and the fastening member 40 expand (elongate) in the stacking direction of the plurality of cell units 10 due to a temperature rise during use.
- the upper plate member 35 and the lower plate member 36 are separated from each other by the extension of the fastening member 40.
- the fastening member 40 has the inner surface 43c that reduces or releases the tensile force by extension, so that the tensile force is reduced by extension of the fastening member 40 at a high temperature such as in use. Alternatively, since the tensile force is released, peeling of the seal portion of the cell unit 10 due to the separation of the upper plate member 35 and the lower plate member 36 from each other is suppressed.
- a plurality of cell stacks 20 are provided, and the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided for each cell stack 20. .
- the lateral shift of the cell unit 10 at the time of conveyance can be suppressed more.
- the plurality of cell stacks 20 are fixed by one fastening member 40, it is necessary to fix the plurality of cell stacks 20 with a relatively large tensile force in order to suppress the lateral displacement of the cell unit 10. For this reason, an excessive force may be applied to the plurality of cell stacks 20 (cell units 10).
- the upper plate member 35, the lower plate member 36, and the fastening member 40 for each cell stack 20 it is possible to suppress an excessive force from being applied to the plurality of cell stacks 20 (cell units 10). it can.
- the first fastening portion 41 when the first fastening portion 41 is fastened to the connection portion 43, the upper plate member 35 and the lower plate member 36 are pulled by a tensile force with the cell stack 20 interposed therebetween.
- the second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43c of the connecting portion 43.
- the 2nd fastening part 42 is comprised so that cancellation
- the locked state of the second fastening portion 42 can be released by extension, and the tensile force can be reduced or the tensile force can be released.
- the insulating member 45 is provided between the second fastening portion 42 and the connection portion 43 to insulate the second fastening portion 42 and the connection portion 43.
- the upper surface side and the lower surface side of the cell stack 20 have different potentials (for example, positive potential or negative potential).
- the upper plate member 35 and the lower plate member 36 are fixed by the fastening member 40, the upper surface side and the lower surface side of the cell stack 20 may be electrically connected (short-circuited). Therefore, in the first embodiment, by providing the insulating member 45, it is possible to suppress conduction (short circuit) between the upper surface side and the lower surface side of the cell stack 20.
- the first fastening portion 41 is fastened to the connection portion 43, thereby fixing the cell stack 20 between the upper plate member 35 and the lower plate member 36.
- the second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43 c of the connection portion 43.
- the first fastening portion 41 and the second fastening portion 42 extend due to the temperature rise, and the locked state of the second fastening portion 42 with respect to the inner side surface 43c of the connection portion 43 is released. Thereby, peeling of the seal
- both the first fastening portion 41 and the second fastening portion 42 have a substantially columnar shape.
- the mechanical strength of the first fastening portion 41 and the second fastening portion 42 is relatively high, so that the fuel cell is transported. Even when 100 moves in the vertical direction (when pushed up), deformation of the first fastening portion 41 and the second fastening portion 42 is suppressed. Thereby, it can suppress that the cell unit 10 shifts
- connection portion 43 has a substantially cylindrical shape, and each of the first fastening portion 41 and the second fastening portion 42 has one of the substantially cylindrical shapes.
- the connecting portion 43 is inserted from the end side and the other end side. Accordingly, the first fastening portion 41 can be easily fastened to the connecting portion 43 by gripping and rotating the connecting portion 43 having a substantially cylindrical shape.
- the upper plate member 35 and the lower plate member 36 are provided separately from the cathode plate 31 and the anode plate 33. Thereby, it is possible to prevent the tensile force from the fastening member 40 from being directly applied to the cathode plate 31 and the anode plate 33.
- the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided separately from the upper pressing member 51, the lower pressing member 52, and the tie rod 53. Yes. Accordingly, the load applied to the cell stack 20 when the fuel cell 100 is used and the load applied to the cell stack 20 to suppress the lateral displacement of the cell unit 10 during transportation can be individually adjusted. Both (power generation) and suppression of lateral deviation of the cell unit 10 can be appropriately performed.
- connection portion 243 has a substantially U shape.
- connection portion 243 of the fastening member 240 has a substantially U-shape.
- the 2nd fastening part 242 is penetrated by the one end side (upper side) of the connection part 243 of a substantially U shape.
- the first fastening portion 241 is inserted through the other end side (downward side) of the connection portion 243.
- the substantially U-shaped connection portion 243 is arranged such that the bottom portion connecting the one end side and the other end side is along the Z direction.
- the second fastening portion 242 has a substantially columnar shape (bolt shape).
- the upper end side (portion where the thread is provided) of the second fastening portion 242 is fastened (screwed) to the upper plate member 35 and is fixed to the upper plate member 35 by a nut 244.
- the lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 is disposed inside the connection portion 243. That is, the second fastening portion 242 is inserted through the hole 243a of the connection portion 243 from below, while the second fastening portion 242 is not fixed to the connection portion 243.
- the 2nd fastening part 242 is comprised so that cancellation
- the lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 is locked to the inner side surface 243c of the connection portion 243 via the insulating member 245.
- the second fastening portion 242 extends in the stacking direction, and the locked state of the lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 with respect to the inner side surface 243c of the connection portion 243 is released. .
- An insulating member 245 is provided between the head portion 242a and the inner side surface 243c of the connection portion 243.
- the inner side surface 243c is an example of the “locking portion” in the claims.
- the first fastening portion 241 has a substantially columnar shape.
- the lower end side of the first fastening portion 241 (the portion where the screw thread is provided) is fastened (screwed) to the lower plate-like member 36 and is fixed to the lower plate-like member 36 by a nut 244. Further, the upper end side of the first fastening portion 241 is inserted into the hole portion 243 b of the connection portion 243 and is fixed to the connection portion 243 by the nut 244.
- connection portion 243 has a substantially U shape
- the second fastening portion 242 and the first fastening portion 241 have one end side of the connection portion 243 having a substantially U shape. And it is penetrated by the connection part 243 from the other end side.
- work with respect to the 2nd fastening part 242 and the 1st fastening part 241 can be performed easily.
- both the second fastening portion 342 and the first fastening portion 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, respectively. .
- connection portion 343 has a substantially annular shape.
- 2nd fastening part 342 is penetrated by the one end side (upper side) of the connection part 343 of a substantially annular shape.
- the first fastening portion 341 is inserted through the other end side (downward side) of the connection portion 343.
- the second fastening portion 342 has a substantially columnar shape (bolt shape).
- the upper side of the second fastening portion 342 (the portion where the screw thread is provided) is fastened (screwed) to the upper plate member 35 and is fixed to the upper plate member 35 by a nut 344.
- the lower end side (bolt-shaped head portion 342a) of the second fastening portion 342 is disposed inside the connection portion 343. That is, the second fastening portion 342 is inserted through the hole 343a of the connection portion 343 from below, while the second fastening portion 342 is not fixed to the connection portion 343. That is, the second fastening portion 342 is configured to be able to release the locked state with respect to the inner side surface 343c of the connection portion 343.
- An insulating member 345 is provided between the head portion 342a and the inner side surface 343c of the connection portion 343.
- the first fastening portion 341 has a substantially columnar shape (bolt shape).
- the lower end side of the first fastening portion 341 (the portion where the screw thread is provided) is fastened (screwed) to the lower plate-like member 36 and is fixed to the lower plate-like member 36 by a nut 344.
- the upper end side (bolt-shaped head portion 341 a) of the first fastening portion 341 is disposed inside the connection portion 343. That is, the first fastening portion 341 is inserted through the hole 343b of the connection portion 343 from above, while the first fastening portion 341 is not fixed to the connection portion 343. That is, the first fastening portion 341 is configured to be able to release the locked state with respect to the inner side surface 343d of the connection portion 343.
- the second fastening portion 342 (upper end side) is fastened to the upper plate member 35
- the first fastening portion 341 (lower end side) is fastened to the lower plate member 36.
- the cell stack 20 is fixed between the upper plate member 35 and the lower plate member 36 by at least one of them.
- both the 2nd fastening part 342 and the 1st fastening part 341 are comprised so that the latching state with respect to the inner surface 343c and the inner surface 343d of the connection part 343 can respectively be cancelled
- the second fastening portion 342 (upper end side) is fastened to the upper plate member 35 and / or the first fastening portion 341 (lower end side) is attached to the lower plate member 36.
- the cell stack 20 is fixed between the upper plate member 35 and the lower plate member 36 by being tightened. That is, the second fastening portion 342 (lower end side) is locked to the inner side surface 343c of the connection portion 343 via the insulating member 345, and the first fastening portion 341 (upper end side) is locked to the inner side surface 343d of the connection portion 343. Is done. Thereby, the lateral shift of the cell unit 10 at the time of conveyance is suppressed.
- the second fastening portion 342 and the first fastening are performed. Since both of the portions 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, the second fastening portion 342, the first fastening portion 341, and the connection portion 343 are extended. As a result, peeling of the seal portion of the cell stack 20 is suppressed.
- the inner side surface 343c and the inner side surface 343d are examples of the “locking portion” in the claims.
- the remaining configuration of the third embodiment is the same as that of the first embodiment.
- both the second fastening portion 342 and the first fastening portion 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, respectively. Yes. Accordingly, even when the second fastening portion 342 and the first fastening portion 341 are extended due to the temperature rise, both the second fastening portion 342 and the first fastening portion 341 are respectively connected to the inner side surface 343c and the inner side surface of the connection portion 343. The locked state with respect to 343d is released. Thereby, peeling of the seal part resulting from the upper plate member 35 and the lower plate member 36 being separated from each other can be further suppressed.
- a cathode plate 431 and an anode plate 433 for taking out electric power from the cell stack 20 are provided on the upper surface side and the lower surface side of the cell stack 20 so as to sandwich the cell stack 20, respectively. It has been.
- the cathode plate 431 and the anode plate 433 are fixed by the tensile force of the fastening member 440 with the cell stack 20 interposed therebetween. That is, in the fuel cell 400, unlike the first to third embodiments, the cathode plate 431 and the anode plate 433 serve as an upper plate member and a lower plate member to which the fastening member 440 is fixed.
- the cathode plate 431 and the anode plate 433 are examples of “one side power extraction portion” and “the other side electrode extraction portion” in the claims, respectively.
- the configuration of the fastening member 440 is the same as the configuration of any of the fastening members of the first to third embodiments.
- the cathode plate 431 and the anode plate 433 also serve as an upper plate member and a lower plate member, respectively. Thereby, since the cathode plate 431 and the anode plate 433 also serve as the upper plate member and the lower plate member, respectively, the number of parts can be reduced.
- the fuel cell is a solid oxide fuel cell (SOFC).
- SOFC solid oxide fuel cell
- the present invention is not limited to this.
- the fuel cell is a fuel cell other than a solid oxide fuel cell, such as a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), a molten carbonic acid fuel cell.
- PEFC polymer electrolyte fuel cell
- PAFC phosphoric acid fuel cell
- MCFC Molten Carbonate Fuel Cell
- the insulating member 45 may not be provided like the fastening member 540 of the fuel cell 500 according to the modification of the first embodiment shown in FIG.
- the head portion 542a of the second fastening portion 542 has a substantially hemispherical shape.
- the diameter of the substantially cylindrical connection portion 543 can be reduced by the amount that the insulating member 45 is not provided.
- the other configuration of the fuel cell 500 is the same as that of the first embodiment.
- the fastening member 40 of the first embodiment shown in FIG. 4 may be disposed between the upper plate member 35 and the lower plate member 36 in a state where the fastening member 40 is turned upside down.
- the fastening member 240 of the second embodiment shown in FIG. 6 may be disposed between the upper plate member 35 and the lower plate member 36 in a state where the fastening member 240 is turned upside down.
- connection portion 243 has a substantially U shape
- the present invention is not limited to this.
- the connection portion 743 may have a substantially annular shape.
- the other configuration of the fuel cell 700 is the same as that of the second embodiment.
- connection portion 343 has a substantially annular shape, but the present invention is not limited to this.
- the connection portion 843 may have a substantially cylindrical shape.
- the other configuration of the fuel cell 800 is the same as that of the third embodiment.
- first fastening portion and the second fastening portion both have substantially columnar shapes, but the present invention is not limited to this.
- the first fastening portion and the second fastening portion may have a shape other than a substantially columnar shape.
- the cathode plate 431 and the anode plate 433 have been shown to serve as the upper plate member and the lower plate member, respectively, but the present invention is not limited to this.
- the anode plate 433 may also serve as the lower plate member.
- the cathode plate 431 may also serve as the upper plate member.
- the upper plate member, the lower plate member, and the fastening member are provided separately from the upper pressing member, the lower pressing member, and the fixing member.
- the present invention is not limited to this.
- the fastening member 1040 may be provided on the tie rod 1001 that fixes the upper pressing member 51 and the lower pressing member 52 as in the fuel cell 1000 according to the modification of the first to fourth embodiments shown in FIG.
- the configuration of the fastening member 1040 is the same as that of any of the fastening members of the first to third embodiments (and modifications).
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Abstract
This fuel cell (100) is provided with fastening members (40) that, accompanying a rise in temperature, expand and stretch more in the stacking direction than a cell stack (20), wherein the fastening members (40) have locking parts (43c) that reduce or release the tensile force brought about by the stretching.
Description
この発明は、燃料電池に関する。
This invention relates to a fuel cell.
従来、燃料電池が知られている。このような燃料電池は、たとえば、特開2009-54415号公報および特開2009-245622号公報に開示されている。上記特開2009-54415号公報に記載の燃料電池は、複数の発電セルが積層された燃料電池スタックと、燃料電池スタックを収容するハウジングと、燃料電池スタックの上端部および(または)側部を固定する固定部材とを備えている。固定部材は、発泡スチロールにより構成されており、燃料電池の使用時において焼失する。これにより、燃料電池が組み立てられた後、搬送される際に、発電セルが横ずれして脱落するのが固定部材により抑制される。また、固定部材が燃料電池の使用時において焼失するので、固定部材が発電動作を阻害する要因になることが抑制される。
Conventionally, fuel cells are known. Such fuel cells are disclosed in, for example, Japanese Unexamined Patent Application Publication Nos. 2009-54415 and 2009-245622. The fuel cell described in Japanese Patent Application Laid-Open No. 2009-54415 includes a fuel cell stack in which a plurality of power generation cells are stacked, a housing that houses the fuel cell stack, an upper end portion and / or a side portion of the fuel cell stack. And a fixing member to be fixed. The fixing member is made of foamed polystyrene, and is burned down when the fuel cell is used. Thereby, when the fuel cell is assembled and then transported, the fixing member prevents the power generation cell from being laterally displaced and falling off. In addition, since the fixing member is burned off when the fuel cell is used, it is suppressed that the fixing member becomes a factor that hinders the power generation operation.
上記特開2009-245622号公報に記載の燃料電池は、複数の発電セルが積層された燃料電池スタックと、燃料電池スタックの上方に配置された錘と、燃料電池スタックを収容するハウジングとを備えている。この燃料電池は、ハウジング(錘)の上方に設けられる支持板と、支持板と錘との間に設けられたスプリング(コイルばね)とを備えている。そして、スプリングは、常温時にはスプリング機能(ばね機能)を有するとともに、燃料電池の使用時にはハウジング内の温度の上昇によりばね機能が失われるように構成されている。これにより、燃料電池の搬送時(常温時)には、スプリングがばね機能を有するので、搬送時に発電セルが横ずれして脱落するのがスプリングにより抑制される。また、燃料電池の使用時にはハウジング内の温度の上昇によりばね機能が失われるので、燃料電池スタックには錘のみの荷重が加わり、過度な荷重が燃料電池スタックに加わることに起因して、発電動作が阻害されることが抑制される。なお、スプリングは、たとえば鉄から構成されており、使用時におけるハウジング内の温度上昇によってスプリングが酸化し、ばね機能が失われるように構成されている。または、スプリングは、合成樹脂から構成されており、使用時におけるハウジング内の温度上昇によってスプリングが溶解し、ばね機能が失われるように構成されている。
The fuel cell described in JP 2009-245622 A includes a fuel cell stack in which a plurality of power generation cells are stacked, a weight disposed above the fuel cell stack, and a housing that houses the fuel cell stack. ing. This fuel cell includes a support plate provided above a housing (weight) and a spring (coil spring) provided between the support plate and the weight. The spring has a spring function (spring function) at a normal temperature and is configured so that the spring function is lost due to a rise in temperature in the housing when the fuel cell is used. Thereby, when the fuel cell is transported (at normal temperature), the spring has a spring function, so that the power generation cell is prevented from being laterally displaced and dropped during transportation. In addition, when the fuel cell is used, the spring function is lost due to a rise in the temperature in the housing, so that only the weight is applied to the fuel cell stack, and excessive power is applied to the fuel cell stack. Is inhibited from being inhibited. Note that the spring is made of, for example, iron, and is configured such that the spring is oxidized due to a temperature rise in the housing during use and the spring function is lost. Alternatively, the spring is made of a synthetic resin, and is configured such that the spring melts due to a temperature rise in the housing during use and the spring function is lost.
しかしながら、上記特開2009-54415号公報に記載の燃料電池では、固定部材が燃料電池の使用時において焼失し、上記特開2009-245622号公報に記載の燃料電池では、スプリングが酸化(または溶解)する。このため、燃料電池を使用した後に再び燃料電池を搬送する際には固定部材(スプリング)が無くなっている。または、スプリングが酸化した状態のまま(ばね機能が失われたまま)である。したがって、燃料電池を使用した後に再び燃料電池を搬送する際には、改めて新たな固定部材またはスプリング(締結部材)を設ける必要があるという問題点がある。
However, in the fuel cell described in JP-A-2009-54415, the fixing member is burned out when the fuel cell is used, and in the fuel cell described in JP-A-2009-245622, the spring is oxidized (or dissolved). ) For this reason, when the fuel cell is transported again after using the fuel cell, there is no fixed member (spring). Alternatively, the spring remains in an oxidized state (the spring function is lost). Therefore, when the fuel cell is transported again after using the fuel cell, there is a problem that a new fixing member or spring (fastening member) needs to be provided again.
この発明は、上記のような課題を解決するためになされたものであり、この発明の1つの目的は、新たな締結部材を設けることなく、使用後に再搬送することが可能な燃料電池を提供することである。
The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a fuel cell that can be re-transported after use without providing a new fastening member. It is to be.
上記目的を達成するために、この発明の一の局面による燃料電池は、複数のセルが積層されたセルスタックと、セルスタックを挟み込むようにセルスタックの上面側および下面側にそれぞれ設けられる上側板状部材および下側板状部材と、セルスタックを挟み込んだ状態で、上側板状部材と下側板状部材とを締結するとともに、締結に伴う引張力によりセルスタックに対して複数のセルの積層方向に加圧力を付与する上側板状部材と下側板状部材とを固定し、温度上昇に伴いセルスタックよりも積層方向に大きく膨張して伸長する締結部材とを備え、締結部材は、伸長により、引張力を軽減または引張力を解除する係止部を有する。
In order to achieve the above object, a fuel cell according to an aspect of the present invention includes a cell stack in which a plurality of cells are stacked, and an upper plate provided on each of an upper surface side and a lower surface side of the cell stack so as to sandwich the cell stack. The upper plate member and the lower plate member are fastened together with the cell-like member and the lower plate-like member sandwiched between the cell stacks, and a plurality of cells are stacked in the stacking direction with respect to the cell stack by the tensile force accompanying the fastening. The upper plate member and the lower plate member for applying pressure are fixed, and a fastening member that expands and expands in the stacking direction more than the cell stack as the temperature rises is provided. It has a locking part that reduces the force or releases the tensile force.
この発明の一の局面による燃料電池では、上記のように、温度上昇に伴いセルスタックよりも積層方向に大きく膨張して伸長する締結部材を備え、締結部材は、伸長により、引張力を軽減または引張力を解除する係止部を有する。ここで、使用時の温度上昇により、セルスタックおよび締結部材が複数のセルの積層方向に膨張(伸長)する。そして、締結部材の伸長により上側板状部材および下側板状部材が互いに離間する。このとき、セルスタックの伸長の度合いよりも締結部材の伸長の度合いが大きい場合、上側板状部材および下側板状部材が互いに離間することに伴って、セルスタックを構成するセルのシール部分(燃料ガス、空気が漏れないようにシールされている部分)が剥がれてしまう。これにより、適切な使用(発電)を行うことができなくなる。そこで、上記のように、締結部材が、伸長により、引張力を軽減または引張力を解除する係止部を有することによって、使用時などの高温時には、締結部材の伸長により引張力が軽減または引張力が解除されるので、上側板状部材および下側板状部材が互いに離間することに起因するセルのシール部分の剥がれが抑制される。これにより、締結部材による発電動作の阻害が抑制される。また、燃料電池を使用した後に、燃料電池の温度が高温から常温になった場合は、伸長した締結部材が元の長さに戻る。これにより、締結部材の引張力により上側板状部材と下側板状部材とが再び固定される。その結果、燃料電池を使用した後に再び燃料電池を搬送する場合でも、セルの横ずれを抑制するための部材(締結部材)を新たに設ける必要はない。このように、新たな締結部材を設けることなく、使用後に燃料電池を再搬送することができる。
In the fuel cell according to one aspect of the present invention, as described above, the fastening member includes a fastening member that expands and expands more in the stacking direction than the cell stack as the temperature rises, and the fastening member reduces the tensile force by stretching or It has a locking part that releases the tensile force. Here, the cell stack and the fastening member expand (elongate) in the stacking direction of the plurality of cells due to the temperature rise during use. Then, the upper plate member and the lower plate member are separated from each other by extension of the fastening member. At this time, when the degree of extension of the fastening member is larger than the degree of extension of the cell stack, the sealing portion of the cells (fuel) constituting the cell stack is accompanied by the separation of the upper plate member and the lower plate member from each other. The part sealed to prevent gas and air from leaking will peel off. As a result, appropriate use (power generation) cannot be performed. Therefore, as described above, the fastening member has a locking portion that reduces or releases the tensile force by extension, so that the tensile force is reduced or pulled by extension of the fastening member at a high temperature such as in use. Since the force is released, peeling of the sealing portion of the cell caused by the upper plate member and the lower plate member being separated from each other is suppressed. Thereby, inhibition of the power generation operation by the fastening member is suppressed. In addition, after the fuel cell is used, when the temperature of the fuel cell is changed from a high temperature to a normal temperature, the extended fastening member returns to the original length. Accordingly, the upper plate member and the lower plate member are fixed again by the tensile force of the fastening member. As a result, even when the fuel cell is transported again after using the fuel cell, it is not necessary to newly provide a member (fastening member) for suppressing the lateral displacement of the cell. In this way, the fuel cell can be transported again after use without providing a new fastening member.
上記一の局面による燃料電池において、好ましくは、セルスタックは、複数設けられており、上側板状部材、下側板状部材および締結部材は、セルスタック毎に設けられている。このように構成すれば、セルスタックがセルスタック毎に締結部材により固定されるので、搬送時のセルの横ずれをより抑制することができる。また、複数のセルスタックを1つの締結部材により固定する場合には、セルの横ずれを抑制するために比較的大きな引張力により複数のセルスタックを固定する必要がある。このため、複数のセルスタック(セル)に過度な力が加わる場合がある。そこで、上側板状部材、下側板状部材および締結部材を、セルスタック毎に設けることによって、複数のセルスタック(セル)に過度な力が加わるのを抑制することができる。
In the fuel cell according to the above aspect, preferably, a plurality of cell stacks are provided, and an upper plate member, a lower plate member, and a fastening member are provided for each cell stack. If comprised in this way, since a cell stack is fixed by a fastening member for every cell stack, the lateral shift | offset | difference of the cell at the time of conveyance can be suppressed more. When a plurality of cell stacks are fixed by one fastening member, it is necessary to fix the plurality of cell stacks with a relatively large tensile force in order to suppress the lateral displacement of the cells. For this reason, an excessive force may be applied to a plurality of cell stacks (cells). Therefore, by providing the upper plate member, the lower plate member, and the fastening member for each cell stack, it is possible to suppress an excessive force from being applied to the plurality of cell stacks (cells).
上記一の局面による燃料電池において、好ましくは、締結部材は、下側板状部材に取り付けられる第1締結部分と、上側板状部材に取り付けられる第2締結部分と、第1締結部分および第2締結部分が挿通され、第1締結部分および第2締結部分を接続するとともに係止部を有する接続部分とを含み、第1締結部分および第2締結部分のうちの一方が、接続部分に締め付けられるか、または、下側板状部材または上側板状部材に締め付けられることにより、セルスタックを挟んだ状態で引張力により上側板状部材と下側板状部材とを固定するとともに、第1締結部分および第2締結部分の少なくとも他方は、接続部分の係止部に対する係止状態を解除可能に構成されている。このように構成すれば、第1締結部分および第2締結部分の少なくとも他方が、接続部分の係止部に対する係止状態を解除可能に構成されているので、締結部材がセルスタックの使用時の温度上昇に対して伸長した場合でも、伸長により第1締結部分および第2締結部分の少なくとも他方の係止状態を解除させて、引張力を軽減または引張力を解除することができる。
In the fuel cell according to the above aspect, preferably, the fastening member includes a first fastening portion attached to the lower plate-like member, a second fastening portion attached to the upper plate-like member, a first fastening portion, and a second fastening. A portion is inserted, and includes a connection portion that connects the first fastening portion and the second fastening portion and has a locking portion, and one of the first fastening portion and the second fastening portion is fastened to the connection portion. Or, the upper plate member and the lower plate member are fixed by a tensile force while sandwiching the cell stack by being clamped to the lower plate member or the upper plate member, and the first fastening portion and the second fastening portion At least the other of the fastening portions is configured to be able to release the locked state of the connecting portion with respect to the locking portion. If comprised in this way, since at least the other of a 1st fastening part and a 2nd fastening part is comprised so that the latching state with respect to the latching | locking part of a connection part can be cancelled | released, a fastening member is the time of use of a cell stack. Even when extended with respect to the temperature rise, it is possible to reduce the tensile force or release the tensile force by releasing the locking state of at least the other of the first fastening portion and the second fastening portion by extension.
この場合、好ましくは、第1締結部分および第2締結部分の少なくとも他方と、接続部分との間に設けられ、第1締結部分および第2締結部分の少なくとも他方と接続部分とを絶縁するための絶縁部材をさらに備える。ここで、セルスタックの上面側と下面側とは、互いに異なる電位(たとえば、正電位または負電位)となる。この場合、上側板状部材と下側板状部材とを締結部材により固定した場合、セルスタックの上面側と下面側とが導通(短絡)してしまう場合がある。そこで、本発明では、絶縁部材を設けることによって、セルスタックの上面側と下面側とが導通(短絡)してしまうのを抑制することができる。
In this case, preferably, it is provided between at least the other of the first fastening portion and the second fastening portion and the connection portion, and insulates the connection portion from at least the other of the first fastening portion and the second fastening portion. An insulating member is further provided. Here, the upper surface side and the lower surface side of the cell stack have different potentials (for example, positive potential or negative potential). In this case, when the upper plate member and the lower plate member are fixed by the fastening member, the upper surface side and the lower surface side of the cell stack may be electrically connected (short-circuited). Therefore, in the present invention, by providing the insulating member, it is possible to suppress conduction (short circuit) between the upper surface side and the lower surface side of the cell stack.
上記締結部材が第1締結部分および第2締結部分を含む燃料電池において、好ましくは、第1締結部分および第2締結部分のうちの一方が、接続部分に締め付けられることにより、上側板状部材と下側板状部材との間にセルスタックを固定するとともに、第1締結部分および第2締結部分の他方は、接続部分の係止部に対する係止状態を解除可能に構成されている。このように構成すれば、温度上昇による第1締結部分および第2締結部分の伸長により、第1締結部分および第2締結部分の他方の接続部分の係止部に対する係止状態が解除される。これにより、上側板状部材および下側板状部材が互いに離間することに起因するシール部分の剥がれを抑制することができる。
In the fuel cell in which the fastening member includes the first fastening part and the second fastening part, preferably, one of the first fastening part and the second fastening part is fastened to the connection part, While fixing a cell stack between lower plate-shaped members, the other of the 1st fastening part and the 2nd fastening part is constituted so that the locked state to the locking part of a connection part can be canceled. If comprised in this way, the latching state with respect to the latching | locking part of the other connection part of a 1st fastening part and a 2nd fastening part will be cancelled | released by the expansion | extension of a 1st fastening part and a 2nd fastening part by temperature rise. Thereby, peeling of the seal | sticker part resulting from an upper plate-shaped member and a lower plate-shaped member separating from each other can be suppressed.
上記締結部材が第1締結部分および第2締結部分を含む燃料電池において、好ましくは、第1締結部分が下側板状部材に締め付けられること、および、第2締結部分が上側板状部材に締め付けられることとのうちの少なくとも一方により、上側板状部材と下側板状部材との間にセルスタックを固定するとともに、第1締結部分および第2締結部分の両方が、接続部分の係止部に対する係止状態を解除可能に構成されている。このように構成すれば、温度上昇により第1締結部分および第2締結部分が伸長した場合、第1締結部分および第2締結部分の両方が、接続部分の係止部に対する係止状態が解除される。これにより、上側板状部材および下側板状部材が互いに離間することに起因するシール部分の剥がれをより抑制することができる。
In the fuel cell in which the fastening member includes the first fastening portion and the second fastening portion, preferably, the first fastening portion is fastened to the lower plate-like member, and the second fastening portion is fastened to the upper plate-like member. The cell stack is fixed between the upper plate member and the lower plate member, and both the first fastening portion and the second fastening portion are engaged with the locking portion of the connection portion. The stop state can be released. If comprised in this way, when a 1st fastening part and a 2nd fastening part extend | expand by temperature rise, both the 1st fastening parts and the 2nd fastening parts will cancel the latching state with respect to the latching | locking part of a connection part. The Thereby, peeling of the seal | sticker part resulting from an upper plate-shaped member and a lower plate-shaped member separating from each other can be suppressed more.
上記締結部材が第1締結部分および第2締結部分を含む燃料電池において、好ましくは、第1締結部分および第2締結部分は、共に、略柱形状を有している。このように構成すれば、第1締結部分および第2締結部分を、ばね等により構成する場合と異なり、第1締結部分および第2締結部分の機械的強度が比較的高いので、搬送時に燃料電池が上下方向に移動した場合(突き上げられた場合)でも、第1締結部分および第2締結部分が変形するのが抑制される。これにより、第1締結部分および第2締結部分の変形に起因して、搬送時にセルが横ずれするのを抑制することができる。
In the fuel cell in which the fastening member includes the first fastening portion and the second fastening portion, preferably, both the first fastening portion and the second fastening portion have a substantially columnar shape. If comprised in this way, unlike the case where a 1st fastening part and a 2nd fastening part are comprised by a spring etc., since the mechanical strength of a 1st fastening part and a 2nd fastening part is comparatively high, a fuel cell at the time of conveyance Even when is moved in the vertical direction (when pushed up), deformation of the first fastening portion and the second fastening portion is suppressed. Thereby, it can suppress that a cell shifts | deviates laterally at the time of conveyance resulting from a deformation | transformation of a 1st fastening part and a 2nd fastening part.
上記締結部材が第1締結部分および第2締結部分を含む燃料電池において、好ましくは、接続部分は、略円筒形状、略U字形状、または、略環形状を有し、第1締結部分および第2締結部分が、それぞれ、略円筒形状、略U字形状、または、略環形状を有する接続部分の一方端側および他方端側から接続部分に挿通されている。ここで、接続部分が略円筒形状を有する場合、略円筒形状を有する接続部分を把持して回転させることにより、容易に、第1締結部分および第2締結部分のうちの一方を接続部分に締め付けることができる。また、接続部分が略U字形状または略環形状を有する場合、接続部分に挿通された第1締結部分および第2締結部分が露出するので、第1締結部分および第2締結部分に対する締め付け作業を容易に行うことができる。
In the fuel cell in which the fastening member includes the first fastening portion and the second fastening portion, preferably, the connecting portion has a substantially cylindrical shape, a substantially U-shape, or a substantially ring shape, The two fastening portions are inserted into the connection portion from one end side and the other end side of the connection portion having a substantially cylindrical shape, a substantially U shape, or a substantially ring shape, respectively. Here, when the connection portion has a substantially cylindrical shape, one of the first fastening portion and the second fastening portion is easily fastened to the connection portion by gripping and rotating the connection portion having the substantially cylindrical shape. be able to. In addition, when the connection portion has a substantially U shape or a substantially ring shape, the first fastening portion and the second fastening portion inserted through the connection portion are exposed, so that the tightening operation for the first fastening portion and the second fastening portion is performed. It can be done easily.
上記一の局面による燃料電池において、好ましくは、セルスタックを挟み込むようにセルスタックの上面側および下面側にそれぞれ設けられ、セルスタックから電力を取り出すための一方側電力取出し部および他方側電極取出し部をさらに備え、上側板状部材および下側板状部材は、一方側電力取出し部および他方側電極取出し部とは別個に設けられている。このように構成すれば、一方側電力取出し部および他方側電極取出し部に、締結部材からの引張力が直接加わるのを抑制することができる。
In the fuel cell according to the above aspect, the one-side power extraction unit and the other-side electrode extraction unit that are provided on the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, respectively, and extract electric power from the cell stack The upper plate member and the lower plate member are provided separately from the one-side power extraction portion and the other-side electrode extraction portion. If comprised in this way, it can suppress that the tensile force from a fastening member is directly added to the one side electric power extraction part and the other side electrode extraction part.
上記一の局面による燃料電池において、好ましくは、セルスタックを挟み込むようにセルスタックの上面側および下面側にそれぞれ設けられ、セルスタックから電力を取り出すための一方側電力取出し部および他方側電極取出し部をさらに備え、一方側電力取出し部および他方側電極取出し部は、それぞれ、上側板状部材および下側板状部材を兼ねている。このように構成すれば、一方側電力取出し部および他方側電極取出し部が、それぞれ、上側板状部材および下側板状部材を兼ねているので、部品点数を削減することができる。
In the fuel cell according to the above aspect, the one-side power extraction portion and the other-side electrode extraction portion that are provided on the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, respectively, and for extracting electric power from the cell stack The one-side power extraction portion and the other-side electrode extraction portion also serve as an upper plate member and a lower plate member, respectively. If comprised in this way, since the one side electric power extraction part and the other side electrode extraction part serve as the upper side plate-shaped member and the lower side plate-shaped member, respectively, the number of parts can be reduced.
上記一の局面による燃料電池において、好ましくは、セルスタックの使用時に、セルスタックを挟み込んで押圧するようにセルスタックの上面側および下面側にそれぞれ設けられる上側押圧部材および下側押圧部材と、セルスタックを挟み込んだ状態で、上側押圧部材および下側押圧部材を固定する固定部材とをさらに備え、上側板状部材、下側板状部材および締結部材は、上側押圧部材、下側押圧部材および固定部材とは別個に設けられている。このように構成すれば、燃料電池の使用時にセルスタックに加える荷重と、搬送時にセルの横ずれを抑制するためにセルスタックに加える荷重とを個別に調整することができるので、燃料電池の使用(発電)とセルの横ずれの抑制との両方を適切に行うことができる。
In the fuel cell according to the above aspect, preferably, when the cell stack is used, an upper pressing member and a lower pressing member respectively provided on the upper surface side and the lower surface side of the cell stack so as to sandwich and press the cell stack, and the cell A fixing member that fixes the upper pressing member and the lower pressing member in a state where the stack is sandwiched, and the upper plate member, the lower plate member, and the fastening member include the upper pressing member, the lower pressing member, and the fixing member. Are provided separately. If comprised in this way, since the load applied to a cell stack at the time of use of a fuel cell and the load applied to a cell stack in order to suppress the lateral displacement of a cell at the time of conveyance can be adjusted separately, use of a fuel cell ( It is possible to appropriately perform both (power generation) and suppression of the lateral displacement of the cell.
本発明によれば、上記のように、新たな締結部材を設けることなく、使用後に燃料電池を再搬送することができる。
According to the present invention, as described above, the fuel cell can be transported again after use without providing a new fastening member.
以下、本発明の実施形態を図面に基づいて説明する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[第1実施形態]
(燃料電池の構成)
図1~図5を参照して、第1実施形態による燃料電池100の構成について説明する。なお、燃料電池100は、たとえば、固体酸化物形燃料電池(SOFC)である。また、燃料電池100は、セルユニット10を複数積層することにより構成されている。なお、セルユニット10は、燃料ガスと空気とが交差するように流れる(クロスフロー)ように構成されている。 [First Embodiment]
(Configuration of fuel cell)
The configuration of thefuel cell 100 according to the first embodiment will be described with reference to FIGS. The fuel cell 100 is, for example, a solid oxide fuel cell (SOFC). The fuel cell 100 is configured by stacking a plurality of cell units 10. The cell unit 10 is configured to flow so that the fuel gas and the air intersect (cross flow).
(燃料電池の構成)
図1~図5を参照して、第1実施形態による燃料電池100の構成について説明する。なお、燃料電池100は、たとえば、固体酸化物形燃料電池(SOFC)である。また、燃料電池100は、セルユニット10を複数積層することにより構成されている。なお、セルユニット10は、燃料ガスと空気とが交差するように流れる(クロスフロー)ように構成されている。 [First Embodiment]
(Configuration of fuel cell)
The configuration of the
まず、図1を参照して、セルユニット10の構成について説明する。セルユニット10は、セル11を備えている。セル11は、カソード11a、固体電解質層11b、および、アノード11cを含む。
First, the configuration of the cell unit 10 will be described with reference to FIG. The cell unit 10 includes a cell 11. The cell 11 includes a cathode 11a, a solid electrolyte layer 11b, and an anode 11c.
また、セルユニット10は、カソード・アノードプレート12を備えている。カソード・アノードプレート12の上面(燃料ガス流路12c)には、セル11が配置されるように構成されている。また、カソード・アノードプレート12には、燃料ガスが燃料ガス流路12cに流入するための開口部12a(121a)と、燃料ガスが燃料ガス流路12cから流出するための開口部12a(121b)とが設けられている。また、カソード・アノードプレート12には、空気ガスが流入する複数の開口部12bが設けられている。また、燃料ガス流路12cは、開口部12aに連通するように構成されている。
The cell unit 10 includes a cathode / anode plate 12. The cell 11 is arranged on the upper surface (fuel gas flow path 12 c) of the cathode / anode plate 12. The cathode / anode plate 12 has an opening 12a (121a) for the fuel gas to flow into the fuel gas flow path 12c and an opening 12a (121b) for the fuel gas to flow out of the fuel gas flow path 12c. And are provided. The cathode / anode plate 12 is provided with a plurality of openings 12b through which air gas flows. The fuel gas channel 12c is configured to communicate with the opening 12a.
また、セルユニット10は、セル押さえ13およびセルホルダリング14を備えている。セル押さえ13およびセルホルダリング14は、カソード・アノードプレート12の下方(Z2方向側)に配置されている。セル押さえ13には、燃料ガスが流入および流出する複数の開口部13aと、空気ガスが流入する複数の開口部13bとが設けられている。また、セル押さえ13には、下方のセルユニット10のセル11が配置される開口部13cが設けられている。また、セルホルダリング14には、燃料ガスが流入および流出する複数の開口部14aと、空気ガスが流入する複数の開口部14bとが設けられている。また、セルホルダリング14には、下方のセルユニット10のセル11が配置される開口部14cが設けられている。
The cell unit 10 includes a cell presser 13 and a cell holder ring 14. The cell retainer 13 and the cell holder ring 14 are arranged below the cathode / anode plate 12 (Z2 direction side). The cell retainer 13 is provided with a plurality of openings 13a through which fuel gas flows in and out and a plurality of openings 13b through which air gas flows. The cell retainer 13 is provided with an opening 13c in which the cell 11 of the lower cell unit 10 is disposed. The cell holder ring 14 is provided with a plurality of openings 14a through which fuel gas flows in and out and a plurality of openings 14b through which air gas flows. The cell holder ring 14 is provided with an opening 14c in which the cell 11 of the lower cell unit 10 is disposed.
そして、複数のセルユニット10が積層されることにより、セルスタック20が構成されている。また、図2に示すように、セルスタック20は、燃料電池100に複数設けられている。複数のセルスタック20は、積層された状態で燃料電池100に設けられている。
The cell stack 20 is configured by stacking a plurality of cell units 10. In addition, as shown in FIG. 2, a plurality of cell stacks 20 are provided in the fuel cell 100. The plurality of cell stacks 20 are provided in the fuel cell 100 in a stacked state.
また、図1に示すように、セルスタック20の上方には、カソードプレート31が設けられている。カソードプレート31は、セルスタック20(複数のセルユニット10)によって発電された電力を取り出す機能を有する。また、カソードプレート31には、燃料ガスが流入および流出する複数の開口部31aと、空気ガスが流入する複数の開口部31bとが設けられている。また、カソードプレート31の裏面側(Z2方向側)には、開口部31bに連通する空気ガス流路31cが設けられている。また、空気ガス流路31cは、セルスタック20の上面に露出するセル11(図示せず)のカソード11aに当接する。なお、カソードプレート31は、特許請求の範囲の「一方側電力取出し部」の一例である。
As shown in FIG. 1, a cathode plate 31 is provided above the cell stack 20. The cathode plate 31 has a function of taking out the electric power generated by the cell stack 20 (the plurality of cell units 10). The cathode plate 31 is provided with a plurality of openings 31a through which fuel gas flows in and out and a plurality of openings 31b through which air gas flows. In addition, an air gas passage 31c communicating with the opening 31b is provided on the back surface side (Z2 direction side) of the cathode plate 31. Further, the air gas flow path 31 c contacts the cathode 11 a of the cell 11 (not shown) exposed on the upper surface of the cell stack 20. The cathode plate 31 is an example of the “one side power extraction portion” in the claims.
また、カソードプレート31の上方には、絶縁プレート32が設けられている。絶縁プレート32は、たとえばマイカ(雲母)から構成されている。絶縁プレート32には、燃料ガスが流入および流出する複数の開口部32aと、空気ガスが流入する複数の開口部32bとが設けられている。また、絶縁プレート32には、後述するセラミックマット37が配置される開口部32cが設けられている。
Further, an insulating plate 32 is provided above the cathode plate 31. The insulating plate 32 is made of mica (mica), for example. The insulating plate 32 is provided with a plurality of openings 32a through which fuel gas flows in and out and a plurality of openings 32b through which air gas flows. The insulating plate 32 is provided with an opening 32c in which a ceramic mat 37 described later is disposed.
また、セルスタック20の下方には、アノードプレート33が設けられている。アノードプレート33は、セルスタック20(複数のセルユニット10)によって発電された電力を取り出す機能を有する。またアノードプレート33には、セル11が配置される燃料ガス流路33cと、燃料ガスが燃料ガス流路33cに流入するための開口部33a(331a)と、燃料ガスが燃料ガス流路33cから流出するための開口部33a(331b)とが設けられている。またアノードプレート33には、空気ガスが流入する複数の開口部33bが設けられている。また、燃料ガス流路33cは、開口部33aに連通するように構成されている。なお、アノードプレート33は、特許請求の範囲の「他方側電力取出し部」の一例である。
Further, an anode plate 33 is provided below the cell stack 20. The anode plate 33 has a function of taking out the electric power generated by the cell stack 20 (the plurality of cell units 10). The anode plate 33 has a fuel gas passage 33c in which the cells 11 are disposed, an opening 33a (331a) for allowing the fuel gas to flow into the fuel gas passage 33c, and the fuel gas from the fuel gas passage 33c. An opening 33a (331b) for flowing out is provided. The anode plate 33 is provided with a plurality of openings 33b through which air gas flows. Further, the fuel gas flow path 33c is configured to communicate with the opening 33a. The anode plate 33 is an example of the “other-side power extraction unit” in the claims.
また、アノードプレート33の下方には、絶縁プレート34が設けられている。絶縁プレート34は、たとえばマイカ(雲母)から構成されている。絶縁プレート34には、燃料ガスが流入および流出する複数の開口部34aと、空気ガスが流入する複数の開口部34bとが設けられている。
Further, an insulating plate 34 is provided below the anode plate 33. The insulating plate 34 is made of mica (mica), for example. The insulating plate 34 is provided with a plurality of openings 34a through which fuel gas flows in and out and a plurality of openings 34b through which air gas flows.
カソード・アノードプレート12、カソードプレート31およびアノードプレート33は、たとえば、フェライト系のSUS430(stainless steel 430)からなる。
The cathode / anode plate 12, the cathode plate 31, and the anode plate 33 are made of, for example, ferrite SUS430 (stainless steel 430).
また、セルスタック20を挟み込むように、セルスタック20の上面側および下面側にそれぞれ、上側板状部材35および下側板状部材36が設けられている。上側板状部材35は、たとえば、フェライト系のSUS430からなる。上側板状部材35には、燃料ガスが流入および流出する複数の開口部35aと、空気ガスが流入する複数の開口部35bとが設けられている。また、上側板状部材35には、セラミックマット37が配置される開口部35cが設けられている。
Further, an upper plate member 35 and a lower plate member 36 are respectively provided on the upper surface side and the lower surface side of the cell stack 20 so as to sandwich the cell stack 20. The upper plate member 35 is made of, for example, ferrite SUS430. The upper plate member 35 is provided with a plurality of openings 35a through which fuel gas flows in and out and a plurality of openings 35b through which air gas flows. The upper plate member 35 is provided with an opening 35c in which the ceramic mat 37 is disposed.
また、下側板状部材36は、たとえば、フェライト系のSUS430からなる。下側板状部材36には、燃料ガスが流入および流出する複数の開口部36aと、空気ガスが流入する複数の開口部36bとが設けられている。
The lower plate member 36 is made of, for example, ferrite SUS430. The lower plate-like member 36 is provided with a plurality of openings 36a through which fuel gas flows in and out and a plurality of openings 36b through which air gas flows.
このように、第1実施形態では、上側板状部材35および下側板状部材36は、カソードプレート31およびアノードプレート33とは別個に設けられている。具体的には、上側板状部材35は、カソードプレート31の上方に積層され、下側板状部材36は、アノードプレート33の下方に積層されている。
Thus, in the first embodiment, the upper plate member 35 and the lower plate member 36 are provided separately from the cathode plate 31 and the anode plate 33. Specifically, the upper plate member 35 is stacked above the cathode plate 31, and the lower plate member 36 is stacked below the anode plate 33.
ここで、第1実施形態では、図2に示すように、セルスタック20を挟み込んだ状態で、上側板状部材35と下側板状部材36とを締結するとともに締結に伴う引張力によりセルスタック20に対して複数のセルユニット10の積層方向に加圧力を付与する上側板状部材35と下側板状部材36とを固定し、温度上昇に伴いセルスタック20よりも積層方向に大きく膨張して伸長する締結部材40が設けられている。締結部材40は、たとえば、オーステナイト系のSUS310(stainless steel 310)により構成されている。オーステナイト系のSUS310は、フェライト系のSUS430からなるカソード・アノードプレート12などよりも温度上昇に対する膨張(伸長)が大きい。これにより、締結部材40の温度上昇に対する膨張(セルユニット10の積層方向に対する伸長)の度合いは、セルスタック20(セルユニット10)の温度上昇に対する膨張(セルユニット10の積層方向に対する伸長)の度合いよりも大きい。
Here, in the first embodiment, as shown in FIG. 2, the upper plate member 35 and the lower plate member 36 are fastened together with the cell stack 20 sandwiched therebetween, and the cell stack 20 is pulled by a tensile force accompanying the fastening. The upper plate member 35 and the lower plate member 36 that apply pressure in the stacking direction of the plurality of cell units 10 are fixed, and expand and expand more in the stacking direction than the cell stack 20 as the temperature rises. A fastening member 40 is provided. The fastening member 40 is made of, for example, austenitic SUS310 (stainless steel 310). The austenite SUS310 has a larger expansion (elongation) with respect to temperature rise than the cathode / anode plate 12 made of ferrite SUS430. Accordingly, the degree of expansion (extension in the stacking direction of the cell units 10) with respect to the temperature rise of the fastening member 40 is the degree of expansion (extension in the stacking direction of the cell units 10) with respect to the temperature rise of the cell stack 20 (cell unit 10). Bigger than.
そして、第1実施形態では、締結部材40は、温度上昇に伴いセルスタック20よりも積層方向に大きく膨張することによる伸長により、引張力を軽減または引張力を解除する内側面43cを有する。セルスタック20の使用時(発電時)の温度上昇に対して伸長した分を吸収可能な構造を有する。たとえば、セルスタック20の使用時(発電時)の温度は、約750℃である。なお、内側面43cは、特許請求の範囲の「係止部」の一例である。また、締結部材40の詳細な構成については、後述する。
And in 1st Embodiment, the fastening member 40 has the inner surface 43c which reduces a tension | tensile_strength or cancels | releases a tension | tensile_strength by expansion | extension by expanding largely in the lamination direction rather than the cell stack 20 with a temperature rise. The cell stack 20 has a structure capable of absorbing the extended portion with respect to the temperature rise during use (power generation). For example, the temperature when the cell stack 20 is used (power generation) is about 750 ° C. The inner side surface 43c is an example of the “locking portion” in the claims. The detailed configuration of the fastening member 40 will be described later.
また、第1実施形態では、図2および図3に示すように、上側板状部材35、下側板状部材36および締結部材40は、セルスタック20毎に設けられている。セルスタック20は、たとえば、燃料電池100に6個設けられている。そして、6個のセルスタック20のそれぞれに、上側板状部材35、下側板状部材36および締結部材40が設けられている。また、締結部材40は、1つのセルスタック20に対して複数(第1実施形態では、4個、図1参照)設けられている。4個の締結部材40は、略矩形形状の上側板状部材35(下側板状部材36)の4隅に設けられている。
In the first embodiment, as shown in FIGS. 2 and 3, the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided for each cell stack 20. For example, six cell stacks 20 are provided in the fuel cell 100. Each of the six cell stacks 20 is provided with an upper plate member 35, a lower plate member 36, and a fastening member 40. Also, a plurality of fastening members 40 are provided for one cell stack 20 (four in the first embodiment, see FIG. 1). The four fastening members 40 are provided at the four corners of the substantially rectangular upper plate member 35 (lower plate member 36).
また、図2に示すように、積層された複数のセルスタック20の上方には、セラミックマット37が配置されている。セラミックマット37は、上側板状部材35の開口部35aの内部に配置されている。また、セラミックマット37(上側板状部材35)の上方には、天板38が配置されている。また、天板38の上方には、セラミックマット39が配置されている。
As shown in FIG. 2, a ceramic mat 37 is disposed above the stacked cell stacks 20. The ceramic mat 37 is disposed inside the opening 35 a of the upper plate member 35. A top plate 38 is disposed above the ceramic mat 37 (upper plate member 35). A ceramic mat 39 is disposed above the top plate 38.
また、セルスタック20の上面側(天板38の上方)および下面側には、それぞれ、上側押圧部材51および下側押圧部材52が設けられている。また、セルスタック20を挟み込んだ状態で、上側押圧部材51および下側押圧部材52を固定するタイロッド53が設けられている。タイロッド53の上端側がナット54により上側押圧部材51に固定されるとともに、タイロッド53の下端側がナット54により下側押圧部材52に固定されることにより、セルユニット10が上下方向から押圧(加圧)される。なお、タイロッド53は、特許請求の範囲の「固定部材」の一例である。
Further, an upper pressing member 51 and a lower pressing member 52 are provided on the upper surface side (above the top plate 38) and the lower surface side of the cell stack 20, respectively. In addition, a tie rod 53 that fixes the upper pressing member 51 and the lower pressing member 52 in a state where the cell stack 20 is sandwiched is provided. The upper end side of the tie rod 53 is fixed to the upper pressing member 51 by the nut 54, and the lower end side of the tie rod 53 is fixed to the lower pressing member 52 by the nut 54, whereby the cell unit 10 is pressed (pressurized) from above and below. Is done. The tie rod 53 is an example of the “fixing member” in the claims.
そして、第1実施形態では、上側板状部材35、下側板状部材36および締結部材40は、上側押圧部材51、下側押圧部材52およびタイロッド53とは別個に設けられている。すなわち、燃料電池100の使用時(運転時、高温時)のセルスタック20に対する押圧は、上側押圧部材51、下側押圧部材52およびタイロッド53により行われる。一方、燃料電池100の搬送時(常温時)のセルスタック20に対する押圧は、上側板状部材35、下側板状部材36および締結部材40により行われる。
In the first embodiment, the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided separately from the upper pressing member 51, the lower pressing member 52, and the tie rod 53. That is, the pressure against the cell stack 20 when the fuel cell 100 is in use (during operation and high temperature) is performed by the upper pressing member 51, the lower pressing member 52, and the tie rod 53. On the other hand, the pressure on the cell stack 20 during the transportation of the fuel cell 100 (at room temperature) is performed by the upper plate member 35, the lower plate member 36, and the fastening member 40.
(締結部材の詳細な構成)
第1実施形態では、図4に示すように、締結部材40は、下側板状部材36に取り付けられる第1締結部分41と、上側板状部材35に取り付けられる第2締結部分42と、第1締結部分41および第2締結部分42が挿通され、第1締結部分41および第2締結部分42を接続する接続部分43とを含む。なお、第1締結部分41、第2締結部分42および接続部分43は、たとえば、SUS310により構成されている。また、後述するナット44およびナット44aも、SUS310により構成されている。 (Detailed configuration of fastening member)
In the first embodiment, as shown in FIG. 4, thefastening member 40 includes a first fastening portion 41 attached to the lower plate member 36, a second fastening portion 42 attached to the upper plate member 35, The fastening portion 41 and the second fastening portion 42 are inserted, and include a connection portion 43 that connects the first fastening portion 41 and the second fastening portion 42. In addition, the 1st fastening part 41, the 2nd fastening part 42, and the connection part 43 are comprised by SUS310, for example. Further, a nut 44 and a nut 44a described later are also formed of SUS310.
第1実施形態では、図4に示すように、締結部材40は、下側板状部材36に取り付けられる第1締結部分41と、上側板状部材35に取り付けられる第2締結部分42と、第1締結部分41および第2締結部分42が挿通され、第1締結部分41および第2締結部分42を接続する接続部分43とを含む。なお、第1締結部分41、第2締結部分42および接続部分43は、たとえば、SUS310により構成されている。また、後述するナット44およびナット44aも、SUS310により構成されている。 (Detailed configuration of fastening member)
In the first embodiment, as shown in FIG. 4, the
第1締結部分41は、略柱形状を有している。具体的には、第1締結部分41の上端側(Z1方向側)および下端側(Z2方向側)には、それぞれ、ねじ山が設けられている。第1締結部分41の下端側は、下側板状部材36のねじ締結孔36cに締結(螺合)されている。また、第1締結部分41の下端側には、ナット44が設けられており、ナット44により第1締結部分41の下端側が下側板状部材36に固定されている。また、第1締結部分41の上端側は、接続部分43に締め付けられて(螺合されて)いる。また、第1締結部分41の上端側には、ナット44が設けられており、ナット44により第1締結部分41の上端側が接続部分43に固定されている。
The first fastening portion 41 has a substantially columnar shape. Specifically, threads are provided on the upper end side (Z1 direction side) and the lower end side (Z2 direction side) of the first fastening portion 41, respectively. The lower end side of the first fastening portion 41 is fastened (screwed) to the screw fastening hole 36 c of the lower plate-like member 36. A nut 44 is provided on the lower end side of the first fastening portion 41, and the lower end side of the first fastening portion 41 is fixed to the lower plate member 36 by the nut 44. Further, the upper end side of the first fastening portion 41 is fastened (screwed) to the connection portion 43. A nut 44 is provided on the upper end side of the first fastening portion 41, and the upper end side of the first fastening portion 41 is fixed to the connection portion 43 by the nut 44.
第2締結部分42は、略柱形状を有している。具体的には、第2締結部分42は、ボルト形状を有している。そして、第2締結部分42の上端側(Z1方向側)には、ねじ山が設けられている。第2締結部分42の上端側は、上側板状部材35のねじ締結孔35dに締結(螺合)されている。また、第2締結部分42の上端側には、ナット44が設けられており、ナット44により第2締結部分42の上端側が上側板状部材35に固定されている。また、第2締結部分42の下端側(Z2方向側、ボルトの頭部分42aの部分)は、接続部分43の内部に配置されている。第2締結部分42の頭部分42aの部分の直径は、第2締結部分42が挿通される接続部分43の穴部43aよりも大きい。これにより、第2締結部分42が接続部分43から上方に抜けることが、第2締結部分42の頭部分42aにより防止される。
The second fastening portion 42 has a substantially columnar shape. Specifically, the second fastening portion 42 has a bolt shape. A screw thread is provided on the upper end side (Z1 direction side) of the second fastening portion 42. The upper end side of the second fastening portion 42 is fastened (screwed) to the screw fastening hole 35 d of the upper plate member 35. A nut 44 is provided on the upper end side of the second fastening portion 42, and the upper end side of the second fastening portion 42 is fixed to the upper plate member 35 by the nut 44. The lower end side of the second fastening portion 42 (Z2 direction side, the bolt head portion 42 a portion) is disposed inside the connection portion 43. The diameter of the head portion 42a of the second fastening portion 42 is larger than the hole 43a of the connection portion 43 through which the second fastening portion 42 is inserted. As a result, the second fastening portion 42 is prevented from slipping upward from the connection portion 43 by the head portion 42 a of the second fastening portion 42.
また、第1実施形態では、接続部分43は、略円筒形状を有している。そして、第1締結部分41および第2締結部分42が、それぞれ、略円筒形状を有する接続部分43の一方端側および他方端側から接続部分43に挿通されている。具体的には、接続部分43の下端には、ナット44aが溶接されている。そして、第1締結部分41の上端側が、ナット44aおよび接続部分43の穴部43bに締結(螺合)されている。
In the first embodiment, the connection portion 43 has a substantially cylindrical shape. And the 1st fastening part 41 and the 2nd fastening part 42 are penetrated by the connection part 43 from the one end side and the other end side of the connection part 43 which respectively have a substantially cylindrical shape. Specifically, a nut 44 a is welded to the lower end of the connection portion 43. The upper end side of the first fastening portion 41 is fastened (screwed) to the nut 44 a and the hole 43 b of the connection portion 43.
そして、第1実施形態では、第1締結部分41が、接続部分43に締め付けられることにより、セルスタック20を挟んだ状態で引張力により上側板状部材35と下側板状部材36とを固定する。具体的には、略円筒形状を有する接続部分43を回転させることにより、第1締結部分41の上端側がナット44aおよび接続部分43の穴部43bに締め付けられる(ねじ込まれる)。なお、第2締結部分42の下端側(頭部分42a側)は、接続部分43から上方に抜けない状態で接続部分43の内部に配置されている。これにより、略円筒形状を有する接続部分43の回転させることにより、上側板状部材35と下側板状部材36とに対して、互いに近づく方向に引張力が働く。その結果、締結部材40の引張力により、セルスタック20を挟んだ状態で上側板状部材35と下側板状部材36とが固定される。すなわち、略円筒形状を有する接続部分43を回転させた場合、接続部分43のZ1方向側の内側面43cにより、第2締結部分42の下端側(頭部分42a側)が係止され、上側板状部材35と下側板状部材36とに対して、互いに近づく方向に引張力が働く。
In the first embodiment, when the first fastening portion 41 is fastened to the connection portion 43, the upper plate member 35 and the lower plate member 36 are fixed by a tensile force while sandwiching the cell stack 20. . Specifically, by rotating the connection portion 43 having a substantially cylindrical shape, the upper end side of the first fastening portion 41 is tightened (screwed) into the nut 44 a and the hole 43 b of the connection portion 43. Note that the lower end side (the head portion 42 a side) of the second fastening portion 42 is disposed inside the connection portion 43 so as not to be pulled upward from the connection portion 43. Thereby, by rotating the connection portion 43 having a substantially cylindrical shape, a tensile force acts on the upper plate member 35 and the lower plate member 36 in a direction approaching each other. As a result, the upper plate member 35 and the lower plate member 36 are fixed by the tensile force of the fastening member 40 with the cell stack 20 interposed therebetween. That is, when the connection portion 43 having a substantially cylindrical shape is rotated, the lower end side (the head portion 42a side) of the second fastening portion 42 is locked by the inner side surface 43c on the Z1 direction side of the connection portion 43, and the upper plate A tensile force acts in a direction approaching each other with respect to the member 35 and the lower plate member 36.
また、第1実施形態では、第2締結部分42は、接続部分43の内側面43cに対する係止状態を解除可能に構成されている。すなわち、第2締結部分42は、第2締結部分42の頭部分42aが接続部分43の内部に配置された状態で、接続部分43に挿通されているだけで、接続部分43に締結(螺合)していない。すなわち、セルスタック20の使用時の温度上昇に対して伸長し、接続部分43の内側面43cに対する係止状態が解除される。
Further, in the first embodiment, the second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43 c of the connection portion 43. That is, the second fastening portion 42 is fastened (screwed) to the connection portion 43 only by being inserted through the connection portion 43 with the head portion 42a of the second fastening portion 42 disposed inside the connection portion 43. Not) That is, the cell stack 20 extends with respect to the temperature rise during use, and the locked state of the connection portion 43 with respect to the inner side surface 43c is released.
また、第1実施形態では、図5(a)に示すように、第2締結部分42と接続部分43との間には、第2締結部分42と接続部分43とを絶縁するための絶縁部材45が設けられている。絶縁部材45は、たとえば、セラミックにより構成されている。また、絶縁部材45は、略円環形状を有しており、略円環形状の絶縁部材45を第2締結部分42が挿通するように構成されている。また、絶縁部材45の側面と、略円筒形状の接続部分43の内側面との間には、隙間46aが設けられている。また、第2締結部分42の頭部分42aと略円筒形状の接続部分43の内側面との間には、隙間46bが設けられている。隙間46aの水平方向に沿った方向の幅W1は、隙間46bの水平方向に沿った方向の幅W2よりも小さい。これにより、第2締結部分42の頭部分42aが水平方向に移動した場合でも、第2締結部分42の頭部分42aが接続部分43の内側面に当接するよりも先に、絶縁部材45の側面が接続部分43の内側面に当接する。また、第2締結部分42が接続部分43の穴部43aの中心軸に対して傾いた場合でも、頭部分42aが接続部分43の内側面に当接するよりも先に、かつ、第2締結部分42が穴部43aの内側面に当接するよりも先に、絶縁部材45の側面が接続部分43の内側面に当接する。これにより、第2締結部分42と接続部分43とが接触(導通)して、上側板状部材35と下側板状部材36とが短絡するのが防止される。
Moreover, in 1st Embodiment, as shown to Fig.5 (a), between the 2nd fastening part 42 and the connection part 43, the insulating member for insulating the 2nd fastening part 42 and the connection part 43 45 is provided. The insulating member 45 is made of ceramic, for example. The insulating member 45 has a substantially annular shape, and is configured such that the second fastening portion 42 passes through the substantially annular insulating member 45. A gap 46 a is provided between the side surface of the insulating member 45 and the inner side surface of the substantially cylindrical connection portion 43. In addition, a gap 46 b is provided between the head portion 42 a of the second fastening portion 42 and the inner side surface of the substantially cylindrical connecting portion 43. The width W1 of the gap 46a along the horizontal direction is smaller than the width W2 of the gap 46b along the horizontal direction. Thereby, even when the head portion 42a of the second fastening portion 42 moves in the horizontal direction, the side surface of the insulating member 45 is moved before the head portion 42a of the second fastening portion 42 contacts the inner surface of the connection portion 43. Abuts against the inner surface of the connecting portion 43. Even when the second fastening portion 42 is inclined with respect to the central axis of the hole 43 a of the connection portion 43, the second fastening portion is provided before the head portion 42 a abuts against the inner surface of the connection portion 43. The side surface of the insulating member 45 comes into contact with the inner side surface of the connection portion 43 before 42 comes into contact with the inner side surface of the hole 43a. Thereby, the 2nd fastening part 42 and the connection part 43 contact (electricity), and it is prevented that the upper side plate-shaped member 35 and the lower side plate-shaped member 36 short-circuit.
(搬送時と使用時との締結部材の状態)
次に、搬送時と使用時との締結部材40の状態について説明する。 (State of fastening member during transport and use)
Next, the state of thefastening member 40 at the time of conveyance and at the time of use will be described.
次に、搬送時と使用時との締結部材40の状態について説明する。 (State of fastening member during transport and use)
Next, the state of the
〈搬送時〉
搬送時では、燃料電池100の温度が比較的低い(常温)ので、締結部材40は膨張(伸長)していない。そして、締結部材40の接続部分43の回転させることにより、締結部材40の引張力により、セルスタック20を挟んだ状態で上側板状部材35と下側板状部材36とが固定される。この状態では、第2締結部分42の下端側(頭部分42a側)が接続部分43のZ1方向側の内側面43cに係止され、第2締結部分42は移動できない。その結果、上側板状部材35と下側板状部材36とによってセルスタック20が固定(加圧)されるので、搬送時におけるセルユニット10の横ずれが抑制される。 <During transport>
During transportation, the temperature of thefuel cell 100 is relatively low (normal temperature), so that the fastening member 40 is not expanded (elongated). Then, by rotating the connecting portion 43 of the fastening member 40, the upper plate member 35 and the lower plate member 36 are fixed by the tensile force of the fastening member 40 while sandwiching the cell stack 20. In this state, the lower end side (head portion 42a side) of the second fastening portion 42 is locked to the inner side surface 43c of the connection portion 43 on the Z1 direction side, and the second fastening portion 42 cannot move. As a result, since the cell stack 20 is fixed (pressurized) by the upper plate member 35 and the lower plate member 36, lateral displacement of the cell unit 10 during conveyance is suppressed.
搬送時では、燃料電池100の温度が比較的低い(常温)ので、締結部材40は膨張(伸長)していない。そして、締結部材40の接続部分43の回転させることにより、締結部材40の引張力により、セルスタック20を挟んだ状態で上側板状部材35と下側板状部材36とが固定される。この状態では、第2締結部分42の下端側(頭部分42a側)が接続部分43のZ1方向側の内側面43cに係止され、第2締結部分42は移動できない。その結果、上側板状部材35と下側板状部材36とによってセルスタック20が固定(加圧)されるので、搬送時におけるセルユニット10の横ずれが抑制される。 <During transport>
During transportation, the temperature of the
〈使用時〉
燃料電池100の使用時(運転時)には、燃料電池100の温度が比較的高くなる。この温度上昇により、第2締結部分42が上下方向(Z方向)に伸長する。なお、セルスタック20も温度上昇により上下方向(Z方向)に伸長する一方、セルスタック20の伸長は、締結部材40の伸長よりも小さい。その結果、第2締結部分42の頭部分42aが下方に移動した状態(図5(b)参照)となる。つまり、内側面43cに対して第2締結部分42の頭部分42aが係止されていた状態が解除される。また、温度上昇により第1締結部分41が上下方向(Z方向)に伸長した場合、第1締結部分41の伸長とセルスタック20の伸長との差の分、接続部分43が上方(Z1方向)側に移動する(持ち上げられる)。また、温度上昇により接続部分43が上下方向(Z方向)に伸長した場合、接続部分43の伸長とセルスタック20の伸長との差の分、接続部分43が上方(Z1方向)側に移動する(持ち上げられる)。すなわち、接続部分43の伸長により、引張力が軽減または引張力が解除される。 <while using it>
When thefuel cell 100 is used (during operation), the temperature of the fuel cell 100 is relatively high. Due to this temperature rise, the second fastening portion 42 extends in the vertical direction (Z direction). The cell stack 20 also expands in the vertical direction (Z direction) due to the temperature rise, while the cell stack 20 extends less than the fastening member 40. As a result, the head portion 42a of the second fastening portion 42 is moved downward (see FIG. 5B). That is, the state in which the head portion 42a of the second fastening portion 42 is locked to the inner side surface 43c is released. Further, when the first fastening portion 41 extends in the vertical direction (Z direction) due to the temperature rise, the connection portion 43 is upward (Z1 direction) by the difference between the extension of the first fastening portion 41 and the extension of the cell stack 20. Move to the side (lifted). Further, when the connection portion 43 extends in the vertical direction (Z direction) due to the temperature rise, the connection portion 43 moves upward (Z1 direction) by the difference between the extension of the connection portion 43 and the extension of the cell stack 20. (Lifted). That is, the tensile force is reduced or the tensile force is released by the extension of the connecting portion 43.
燃料電池100の使用時(運転時)には、燃料電池100の温度が比較的高くなる。この温度上昇により、第2締結部分42が上下方向(Z方向)に伸長する。なお、セルスタック20も温度上昇により上下方向(Z方向)に伸長する一方、セルスタック20の伸長は、締結部材40の伸長よりも小さい。その結果、第2締結部分42の頭部分42aが下方に移動した状態(図5(b)参照)となる。つまり、内側面43cに対して第2締結部分42の頭部分42aが係止されていた状態が解除される。また、温度上昇により第1締結部分41が上下方向(Z方向)に伸長した場合、第1締結部分41の伸長とセルスタック20の伸長との差の分、接続部分43が上方(Z1方向)側に移動する(持ち上げられる)。また、温度上昇により接続部分43が上下方向(Z方向)に伸長した場合、接続部分43の伸長とセルスタック20の伸長との差の分、接続部分43が上方(Z1方向)側に移動する(持ち上げられる)。すなわち、接続部分43の伸長により、引張力が軽減または引張力が解除される。 <while using it>
When the
ここで、第2締結部分42の頭部分42aが接続部分43に固定されていないので、第1締結部分41、第2締結部分42、および、接続部分43が伸長しても、上側板状部材35と下側板状部材36との間の距離は変わらない。なお、セルスタック20も燃料電池100の使用時(運転時)の温度上昇により、上下方向に膨張(伸長する)ので、その分、上側板状部材35と下側板状部材36との間の距離は大きくなる。そして、締結部材40の伸長は、セルスタック20の伸長よりも大きい一方、締結部材40が伸長した分は、接続部分43の内部に吸収されるので、接続部分43の伸長が、セルスタック20の伸長以上に上側板状部材35と下側板状部材36との間の距離を大きくすることはない。これにより、セルスタック20(セルユニット10)のシール部分が剥がれることが防止されるので、適切に発電を行うことが可能になる。
Here, since the head portion 42a of the second fastening portion 42 is not fixed to the connection portion 43, even if the first fastening portion 41, the second fastening portion 42, and the connection portion 43 extend, the upper plate-like member The distance between 35 and the lower plate member 36 does not change. Since the cell stack 20 also expands (extends) in the vertical direction due to a temperature rise when the fuel cell 100 is used (during operation), the distance between the upper plate member 35 and the lower plate member 36 accordingly. Will grow. The extension of the fastening member 40 is larger than the extension of the cell stack 20. On the other hand, the extension of the fastening member 40 is absorbed into the connection portion 43. The distance between the upper plate member 35 and the lower plate member 36 is not increased more than the extension. As a result, the seal portion of the cell stack 20 (cell unit 10) is prevented from being peeled off, so that power generation can be performed appropriately.
(第1実施形態の効果)
第1実施形態では、以下のような効果を得ることができる。 (Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.
第1実施形態では、以下のような効果を得ることができる。 (Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.
第1実施形態では、上記のように、温度上昇に伴いセルスタック20よりも積層方向に大きく膨張して伸長する締結部材40を備え、締結部材40は、伸長により、引張力を軽減または引張力を解除する内側面43cを有する。ここで、使用時の温度上昇により、セルスタック20および締結部材40が複数のセルユニット10の積層方向に膨張(伸長)する。そして、締結部材40の伸長により上側板状部材35および下側板状部材36が互いに離間する。このとき、セルスタック20の伸長の度合いよりも締結部材40の伸長の度合いが大きい場合、上側板状部材35および下側板状部材36が互いに離間することに伴って、セルスタック20を構成するセルユニット10のシール部分が剥がれてしまう。これにより、適切な使用(発電)を行うことができなくなる。そこで、上記のように、締結部材40が、伸長により、引張力を軽減または引張力を解除する内側面43cを有することによって、使用時などの高温時には、締結部材40の伸長により引張力が軽減または引張力が解除されるので、上側板状部材35および下側板状部材36が互いに離間することに起因するセルユニット10のシール部分の剥がれが抑制される。これにより、締結部材40による発電動作の阻害が抑制される。また、燃料電池100を使用した後に、燃料電池100の温度が高温から常温になった場合は、伸長した締結部材40が元の長さに戻る。これにより、締結部材40の引張力により上側板状部材35と下側板状部材36とが再び固定される。その結果、燃料電池100を使用した後に再び燃料電池100を搬送する場合でも、セルユニット10の横ずれを抑制するための部材(締結部材40)を新たに設ける必要はない。このように、新たな締結部材40を設けることなく、使用後に燃料電池100を再搬送することができる。
In the first embodiment, as described above, the fastening member 40 that expands and expands more in the stacking direction than the cell stack 20 as the temperature rises is provided, and the fastening member 40 reduces the tensile force or the tensile force by stretching. An inner side surface 43c for releasing Here, the cell stack 20 and the fastening member 40 expand (elongate) in the stacking direction of the plurality of cell units 10 due to a temperature rise during use. The upper plate member 35 and the lower plate member 36 are separated from each other by the extension of the fastening member 40. At this time, when the degree of extension of the fastening member 40 is greater than the degree of extension of the cell stack 20, the cells constituting the cell stack 20 as the upper plate member 35 and the lower plate member 36 are separated from each other. The seal part of the unit 10 is peeled off. As a result, appropriate use (power generation) cannot be performed. Therefore, as described above, the fastening member 40 has the inner surface 43c that reduces or releases the tensile force by extension, so that the tensile force is reduced by extension of the fastening member 40 at a high temperature such as in use. Alternatively, since the tensile force is released, peeling of the seal portion of the cell unit 10 due to the separation of the upper plate member 35 and the lower plate member 36 from each other is suppressed. Thereby, inhibition of the power generation operation by the fastening member 40 is suppressed. In addition, after the fuel cell 100 is used, when the temperature of the fuel cell 100 changes from high temperature to room temperature, the extended fastening member 40 returns to its original length. Accordingly, the upper plate member 35 and the lower plate member 36 are fixed again by the tensile force of the fastening member 40. As a result, even when the fuel cell 100 is transported again after using the fuel cell 100, it is not necessary to newly provide a member (fastening member 40) for suppressing the lateral displacement of the cell unit 10. In this way, the fuel cell 100 can be transported again after use without providing a new fastening member 40.
また、第1実施形態では、上記のように、セルスタック20は、複数設けられており、上側板状部材35、下側板状部材36および締結部材40は、セルスタック20毎に設けられている。これにより、セルスタック20がセルスタック20毎に締結部材40により固定されるので、搬送時のセルユニット10の横ずれをより抑制することができる。また、複数のセルスタック20を1つの締結部材40により固定する場合には、セルユニット10の横ずれを抑制するために比較的大きな引張力により複数のセルスタック20を固定する必要がある。このため、複数のセルスタック20(セルユニット10)に過度な力が加わる場合がある。そこで、上側板状部材35、下側板状部材36および締結部材40を、セルスタック20毎に設けることによって、複数のセルスタック20(セルユニット10)に過度な力が加わるのを抑制することができる。
In the first embodiment, as described above, a plurality of cell stacks 20 are provided, and the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided for each cell stack 20. . Thereby, since the cell stack 20 is fixed by the fastening member 40 for every cell stack 20, the lateral shift of the cell unit 10 at the time of conveyance can be suppressed more. Further, when the plurality of cell stacks 20 are fixed by one fastening member 40, it is necessary to fix the plurality of cell stacks 20 with a relatively large tensile force in order to suppress the lateral displacement of the cell unit 10. For this reason, an excessive force may be applied to the plurality of cell stacks 20 (cell units 10). Thus, by providing the upper plate member 35, the lower plate member 36, and the fastening member 40 for each cell stack 20, it is possible to suppress an excessive force from being applied to the plurality of cell stacks 20 (cell units 10). it can.
また、第1実施形態では、上記のように、第1締結部分41が接続部分43に締め付けられることにより、セルスタック20を挟んだ状態で引張力により上側板状部材35と下側板状部材36とを固定するとともに、第2締結部分42は、接続部分43の内側面43cに対する係止状態を解除可能に構成されている。これにより、第2締結部分42が、接続部分43の内側面43cに対する係止状態を解除可能に構成されているので、締結部材40がセルスタック20の使用時の温度上昇に対して伸長した場合でも、伸長により第2締結部分42の係止状態を解除させて、引張力を軽減または引張力を解除することができる。
In the first embodiment, as described above, when the first fastening portion 41 is fastened to the connection portion 43, the upper plate member 35 and the lower plate member 36 are pulled by a tensile force with the cell stack 20 interposed therebetween. The second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43c of the connecting portion 43. Thereby, since the 2nd fastening part 42 is comprised so that cancellation | release state with respect to the inner surface 43c of the connection part 43 can be cancelled | released, when the fastening member 40 is extended with respect to the temperature rise at the time of use of the cell stack 20 However, the locked state of the second fastening portion 42 can be released by extension, and the tensile force can be reduced or the tensile force can be released.
また、第1実施形態では、上記のように、第2締結部分42と、接続部分43との間に設けられ、第2締結部分42と接続部分43とを絶縁するための絶縁部材45を設ける。ここで、セルスタック20の上面側と下面側とは、互いに異なる電位(たとえば、正電位または負電位)となる。この場合、上側板状部材35と下側板状部材36とを締結部材40により固定した場合、セルスタック20の上面側と下面側とが導通(短絡)してしまう場合がある。そこで、第1実施形態では、絶縁部材45を設けることによって、セルスタック20の上面側と下面側とが導通(短絡)してしまうのを抑制することができる。
In the first embodiment, as described above, the insulating member 45 is provided between the second fastening portion 42 and the connection portion 43 to insulate the second fastening portion 42 and the connection portion 43. . Here, the upper surface side and the lower surface side of the cell stack 20 have different potentials (for example, positive potential or negative potential). In this case, when the upper plate member 35 and the lower plate member 36 are fixed by the fastening member 40, the upper surface side and the lower surface side of the cell stack 20 may be electrically connected (short-circuited). Therefore, in the first embodiment, by providing the insulating member 45, it is possible to suppress conduction (short circuit) between the upper surface side and the lower surface side of the cell stack 20.
また、第1実施形態では、上記のように、第1締結部分41が、接続部分43に締め付けられることにより、上側板状部材35と下側板状部材36との間にセルスタック20を固定するとともに、第2締結部分42は、接続部分43の内側面43cに対する係止状態を解除可能に構成されている。これにより、温度上昇による第1締結部分41および第2締結部分42の伸長により、第2締結部分42の接続部分43の内側面43cに対する係止状態が解除される。これにより、上側板状部材35および下側板状部材36が互いに離間することに起因するシール部分の剥がれを抑制することができる。
In the first embodiment, as described above, the first fastening portion 41 is fastened to the connection portion 43, thereby fixing the cell stack 20 between the upper plate member 35 and the lower plate member 36. In addition, the second fastening portion 42 is configured to be able to release the locked state with respect to the inner side surface 43 c of the connection portion 43. As a result, the first fastening portion 41 and the second fastening portion 42 extend due to the temperature rise, and the locked state of the second fastening portion 42 with respect to the inner side surface 43c of the connection portion 43 is released. Thereby, peeling of the seal | sticker part resulting from separating the upper side plate-shaped member 35 and the lower side plate-shaped member 36 mutually can be suppressed.
また、第1実施形態では、上記のように、第1締結部分41および第2締結部分42は、共に、略柱形状を有している。これにより、第1締結部分41および第2締結部分42を、ばね等により構成する場合と異なり、第1締結部分41および第2締結部分42の機械的強度が比較的高いので、搬送時に燃料電池100が上下方向に移動した場合(突き上げられた場合)でも、第1締結部分41および第2締結部分42が変形するのが抑制される。これにより、第1締結部分41および第2締結部分42の変形に起因して、搬送時にセルユニット10が横ずれするのを抑制することができる。
In the first embodiment, as described above, both the first fastening portion 41 and the second fastening portion 42 have a substantially columnar shape. As a result, unlike the case where the first fastening portion 41 and the second fastening portion 42 are configured by springs or the like, the mechanical strength of the first fastening portion 41 and the second fastening portion 42 is relatively high, so that the fuel cell is transported. Even when 100 moves in the vertical direction (when pushed up), deformation of the first fastening portion 41 and the second fastening portion 42 is suppressed. Thereby, it can suppress that the cell unit 10 shifts | deviates laterally at the time of conveyance resulting from a deformation | transformation of the 1st fastening part 41 and the 2nd fastening part 42.
また、第1実施形態では、上記のように、接続部分43は、略円筒形状を有し、第1締結部分41および第2締結部分42が、それぞれ、略円筒形状を有する接続部分43の一方端側および他方端側から接続部分43に挿通されている。これにより、略円筒形状を有する接続部分43を把持して回転させることにより、容易に、第1締結部分41を接続部分43に締め付けることができる。
In the first embodiment, as described above, the connection portion 43 has a substantially cylindrical shape, and each of the first fastening portion 41 and the second fastening portion 42 has one of the substantially cylindrical shapes. The connecting portion 43 is inserted from the end side and the other end side. Accordingly, the first fastening portion 41 can be easily fastened to the connecting portion 43 by gripping and rotating the connecting portion 43 having a substantially cylindrical shape.
また、第1実施形態では、上記のように、上側板状部材35および下側板状部材36は、カソードプレート31およびアノードプレート33とは別個に設けられている。これにより、カソードプレート31およびアノードプレート33に、締結部材40からの引張力が直接加わるのを抑制することができる。
In the first embodiment, as described above, the upper plate member 35 and the lower plate member 36 are provided separately from the cathode plate 31 and the anode plate 33. Thereby, it is possible to prevent the tensile force from the fastening member 40 from being directly applied to the cathode plate 31 and the anode plate 33.
また、第1実施形態では、上記のように、上側板状部材35、下側板状部材36および締結部材40は、上側押圧部材51、下側押圧部材52およびタイロッド53とは別個に設けられている。これにより、燃料電池100の使用時にセルスタック20に加える荷重と、搬送時にセルユニット10の横ずれを抑制するためにセルスタック20に加える荷重とを個別に調整することができるので、燃料電池100使用(発電)とセルユニット10の横ずれの抑制との両方を適切に行うことができる。
In the first embodiment, as described above, the upper plate member 35, the lower plate member 36, and the fastening member 40 are provided separately from the upper pressing member 51, the lower pressing member 52, and the tie rod 53. Yes. Accordingly, the load applied to the cell stack 20 when the fuel cell 100 is used and the load applied to the cell stack 20 to suppress the lateral displacement of the cell unit 10 during transportation can be individually adjusted. Both (power generation) and suppression of lateral deviation of the cell unit 10 can be appropriately performed.
[第2実施形態]
(燃料電池の構成)
図6を参照して、第2実施形態による燃料電池200の構成について説明する。第2実施形態による燃料電池200では、接続部分243が略U字形状を有する。 [Second Embodiment]
(Configuration of fuel cell)
With reference to FIG. 6, the structure of thefuel cell 200 by 2nd Embodiment is demonstrated. In the fuel cell 200 according to the second embodiment, the connection portion 243 has a substantially U shape.
(燃料電池の構成)
図6を参照して、第2実施形態による燃料電池200の構成について説明する。第2実施形態による燃料電池200では、接続部分243が略U字形状を有する。 [Second Embodiment]
(Configuration of fuel cell)
With reference to FIG. 6, the structure of the
図6に示すように、第2実施形態による燃料電池200では、締結部材240の接続部分243が略U字形状を有する。そして、略U字形状の接続部分243の一方端側(上方側)に第2締結部分242が挿通されている。また、接続部分243の他方端側(下方側)に第1締結部分241が挿通されている。これにより、略U字形状の接続部分243は、一方端側と他方端側とを接続する底部が、Z方向に沿うように配置される。
As shown in FIG. 6, in the fuel cell 200 according to the second embodiment, the connection portion 243 of the fastening member 240 has a substantially U-shape. And the 2nd fastening part 242 is penetrated by the one end side (upper side) of the connection part 243 of a substantially U shape. The first fastening portion 241 is inserted through the other end side (downward side) of the connection portion 243. Thereby, the substantially U-shaped connection portion 243 is arranged such that the bottom portion connecting the one end side and the other end side is along the Z direction.
第2締結部分242は、略柱形状(ボルト形状)を有する。そして、第2締結部分242の上端側(ねじ山が設けられる部分)は、上側板状部材35に締結(螺合)されるとともに、ナット244により上側板状部材35に固定されている。また、第2締結部分242の下端側(ボルト形状の頭部分242a)は、接続部分243の内部に配置されている。すなわち、第2締結部分242は、下方より接続部分243の穴部243aに挿通されている一方、第2締結部分242は接続部分243に対して固定されていない。すなわち、第2締結部分242は、接続部分243の内側面243cに対する係止状態を解除可能に構成されている。具体的には、搬送時には、第2締結部分242の下端側(ボルト形状の頭部分242a)は、絶縁部材245を介して接続部分243の内側面243cに係止されている。また、発電時には、第2締結部分242が積層方向に伸長して、接続部分243の内側面243cに対する第2締結部分242の下端側(ボルト形状の頭部分242a)の係止状態が解除される。これにより、引張力が軽減または引張力が解除される。なお、頭部分242aと接続部分243の内側面243cとの間には、絶縁部材245が設けられている。また、内側面243cは、特許請求の範囲の「係止部」の一例である。
The second fastening portion 242 has a substantially columnar shape (bolt shape). The upper end side (portion where the thread is provided) of the second fastening portion 242 is fastened (screwed) to the upper plate member 35 and is fixed to the upper plate member 35 by a nut 244. The lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 is disposed inside the connection portion 243. That is, the second fastening portion 242 is inserted through the hole 243a of the connection portion 243 from below, while the second fastening portion 242 is not fixed to the connection portion 243. That is, the 2nd fastening part 242 is comprised so that cancellation | release state with respect to the inner surface 243c of the connection part 243 can be cancelled | released. Specifically, at the time of conveyance, the lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 is locked to the inner side surface 243c of the connection portion 243 via the insulating member 245. Further, during power generation, the second fastening portion 242 extends in the stacking direction, and the locked state of the lower end side (bolt-shaped head portion 242a) of the second fastening portion 242 with respect to the inner side surface 243c of the connection portion 243 is released. . Thereby, the tensile force is reduced or the tensile force is released. An insulating member 245 is provided between the head portion 242a and the inner side surface 243c of the connection portion 243. The inner side surface 243c is an example of the “locking portion” in the claims.
また、第1締結部分241は、略柱形状を有する。そして、第1締結部分241の下端側(ねじ山が設けられる部分)は、下側板状部材36に締結(螺合)されるとともに、ナット244により下側板状部材36に固定されている。また、第1締結部分241の上端側は、接続部分243の穴部243bに挿通されるとともに、ナット244により接続部分243に固定されている。
The first fastening portion 241 has a substantially columnar shape. The lower end side of the first fastening portion 241 (the portion where the screw thread is provided) is fastened (screwed) to the lower plate-like member 36 and is fixed to the lower plate-like member 36 by a nut 244. Further, the upper end side of the first fastening portion 241 is inserted into the hole portion 243 b of the connection portion 243 and is fixed to the connection portion 243 by the nut 244.
なお、第2実施形態のその他の構成は、上記第1実施形態と同様である。
In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.
(第2実施形態の効果)
第2実施形態では、以下のような効果を得ることができる。 (Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.
第2実施形態では、以下のような効果を得ることができる。 (Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.
第2実施形態では、上記のように、接続部分243は、略U字形状を有し、第2締結部分242および第1締結部分241が、略U字形状を有する接続部分243の一方端側および他方端側から接続部分243に挿通されている。これにより、接続部分243に挿通された第2締結部分242および第1締結部分241が露出するので、第2締結部分242および第1締結部分241に対する締め付け作業を容易に行うことができる。
In the second embodiment, as described above, the connection portion 243 has a substantially U shape, and the second fastening portion 242 and the first fastening portion 241 have one end side of the connection portion 243 having a substantially U shape. And it is penetrated by the connection part 243 from the other end side. Thereby, since the 2nd fastening part 242 and the 1st fastening part 241 which were penetrated by the connection part 243 are exposed, the fastening operation | work with respect to the 2nd fastening part 242 and the 1st fastening part 241 can be performed easily.
[第3実施形態]
(燃料電池の構成)
図7を参照して、第3実施形態による燃料電池300の構成について説明する。第3実施形態による燃料電池300では、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態を解除可能に構成されている。 [Third Embodiment]
(Configuration of fuel cell)
With reference to FIG. 7, the structure of thefuel cell 300 by 3rd Embodiment is demonstrated. In the fuel cell 300 according to the third embodiment, both the second fastening portion 342 and the first fastening portion 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, respectively. .
(燃料電池の構成)
図7を参照して、第3実施形態による燃料電池300の構成について説明する。第3実施形態による燃料電池300では、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態を解除可能に構成されている。 [Third Embodiment]
(Configuration of fuel cell)
With reference to FIG. 7, the structure of the
図7に示すように、第3実施形態による燃料電池300では、接続部分343が略円環形状を有する。そして、略円環形状の接続部分343の一方端側(上方側)に第2締結部分342が挿通されている。また、接続部分343の他方端側(下方側)に第1締結部分341が挿通されている。
As shown in FIG. 7, in the fuel cell 300 according to the third embodiment, the connection portion 343 has a substantially annular shape. And the 2nd fastening part 342 is penetrated by the one end side (upper side) of the connection part 343 of a substantially annular shape. The first fastening portion 341 is inserted through the other end side (downward side) of the connection portion 343.
第2締結部分342は、略柱形状(ボルト形状)を有する。そして、第2締結部分342の上端側(ねじ山が設けられる部分)は、上側板状部材35に締結(螺合)されるとともに、ナット344により上側板状部材35に固定されている。また、第2締結部分342の下端側(ボルト形状の頭部分342a)は、接続部分343の内部に配置されている。すなわち、第2締結部分342は、下方より接続部分343の穴部343aに挿通されている一方、第2締結部分342は接続部分343に対して固定されていない。すなわち、第2締結部分342は、接続部分343の内側面343cに対する係止状態を解除可能に構成されている。なお、頭部分342aと接続部分343の内側面343cとの間には、絶縁部材345が設けられている。
The second fastening portion 342 has a substantially columnar shape (bolt shape). The upper side of the second fastening portion 342 (the portion where the screw thread is provided) is fastened (screwed) to the upper plate member 35 and is fixed to the upper plate member 35 by a nut 344. The lower end side (bolt-shaped head portion 342a) of the second fastening portion 342 is disposed inside the connection portion 343. That is, the second fastening portion 342 is inserted through the hole 343a of the connection portion 343 from below, while the second fastening portion 342 is not fixed to the connection portion 343. That is, the second fastening portion 342 is configured to be able to release the locked state with respect to the inner side surface 343c of the connection portion 343. An insulating member 345 is provided between the head portion 342a and the inner side surface 343c of the connection portion 343.
また、第1締結部分341は、略柱形状(ボルト形状)を有する。そして、第1締結部分341の下端側(ねじ山が設けられる部分)は、下側板状部材36に締結(螺合)されるとともに、ナット344により下側板状部材36に固定されている。また、第1締結部分341の上端側(ボルト形状の頭部分341a)は、接続部分343の内部に配置されている。すなわち、第1締結部分341は、上方より接続部分343の穴部343bに挿通されている一方、第1締結部分341は接続部分343に対して固定されていない。すなわち、第1締結部分341は、接続部分343の内側面343dに対する係止状態を解除可能に構成されている。
The first fastening portion 341 has a substantially columnar shape (bolt shape). The lower end side of the first fastening portion 341 (the portion where the screw thread is provided) is fastened (screwed) to the lower plate-like member 36 and is fixed to the lower plate-like member 36 by a nut 344. Further, the upper end side (bolt-shaped head portion 341 a) of the first fastening portion 341 is disposed inside the connection portion 343. That is, the first fastening portion 341 is inserted through the hole 343b of the connection portion 343 from above, while the first fastening portion 341 is not fixed to the connection portion 343. That is, the first fastening portion 341 is configured to be able to release the locked state with respect to the inner side surface 343d of the connection portion 343.
そして、第3実施形態では、第2締結部分342(上端側)が上側板状部材35に締め付けられること、および、第1締結部分341(下端側)が下側板状部材36に締め付けられることとのうちの少なくとも一方により、上側板状部材35と下側板状部材36との間にセルスタック20が固定される。また、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態を解除可能に構成されている。具体的には、搬送時では、第2締結部分342(上端側)が上側板状部材35に締め付けられること、および(または)、第1締結部分341(下端側)が下側板状部材36に締め付けられることにより、上側板状部材35と下側板状部材36との間にセルスタック20が固定されている。つまり、第2締結部分342(下端側)が絶縁部材345を介して接続部分343の内側面343cに係止され、第1締結部分341(上端側)が接続部分343の内側面343dに係止される。これにより、搬送時におけるセルユニット10の横ずれが抑制される。また、燃料電池300の使用時(運転時)の温度上昇により、第2締結部分342、第1締結部分341および接続部分343がZ方向に伸長しても、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態を解除可能に構成されているので、第2締結部分342、第1締結部分341および接続部分343の伸長に起因して、セルスタック20のシール部分が剥がれることが抑制される。なお、内側面343cおよび内側面343dは、特許請求の範囲の「係止部」の一例である。
In the third embodiment, the second fastening portion 342 (upper end side) is fastened to the upper plate member 35, and the first fastening portion 341 (lower end side) is fastened to the lower plate member 36. The cell stack 20 is fixed between the upper plate member 35 and the lower plate member 36 by at least one of them. Moreover, both the 2nd fastening part 342 and the 1st fastening part 341 are comprised so that the latching state with respect to the inner surface 343c and the inner surface 343d of the connection part 343 can respectively be cancelled | released. Specifically, at the time of conveyance, the second fastening portion 342 (upper end side) is fastened to the upper plate member 35 and / or the first fastening portion 341 (lower end side) is attached to the lower plate member 36. The cell stack 20 is fixed between the upper plate member 35 and the lower plate member 36 by being tightened. That is, the second fastening portion 342 (lower end side) is locked to the inner side surface 343c of the connection portion 343 via the insulating member 345, and the first fastening portion 341 (upper end side) is locked to the inner side surface 343d of the connection portion 343. Is done. Thereby, the lateral shift of the cell unit 10 at the time of conveyance is suppressed. Further, even if the second fastening portion 342, the first fastening portion 341, and the connection portion 343 extend in the Z direction due to a temperature rise during use (operation) of the fuel cell 300, the second fastening portion 342 and the first fastening are performed. Since both of the portions 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, the second fastening portion 342, the first fastening portion 341, and the connection portion 343 are extended. As a result, peeling of the seal portion of the cell stack 20 is suppressed. The inner side surface 343c and the inner side surface 343d are examples of the “locking portion” in the claims.
なお、第3実施形態のその他の構成は、上記第1実施形態と同様である。
The remaining configuration of the third embodiment is the same as that of the first embodiment.
(第3実施形態の効果)
第3実施形態では、以下のような効果を得ることができる。 (Effect of the third embodiment)
In the third embodiment, the following effects can be obtained.
第3実施形態では、以下のような効果を得ることができる。 (Effect of the third embodiment)
In the third embodiment, the following effects can be obtained.
第3実施形態では、上記のように、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態を解除可能に構成されている。これにより、温度上昇により第2締結部分342および第1締結部分341が伸長した場合でも、第2締結部分342および第1締結部分341の両方が、それぞれ、接続部分343の内側面343cおよび内側面343dに対する係止状態が解除される。これにより、上側板状部材35および下側板状部材36が互いに離間することに起因するシール部分の剥がれをより抑制することができる。
In the third embodiment, as described above, both the second fastening portion 342 and the first fastening portion 341 are configured to be able to release the locked state with respect to the inner side surface 343c and the inner side surface 343d of the connection portion 343, respectively. Yes. Accordingly, even when the second fastening portion 342 and the first fastening portion 341 are extended due to the temperature rise, both the second fastening portion 342 and the first fastening portion 341 are respectively connected to the inner side surface 343c and the inner side surface of the connection portion 343. The locked state with respect to 343d is released. Thereby, peeling of the seal part resulting from the upper plate member 35 and the lower plate member 36 being separated from each other can be further suppressed.
[第4実施形態]
(燃料電池の構成)
図8を参照して、第4実施形態による燃料電池400の構成について説明する。第4実施形態による燃料電池400では、カソードプレート431およびアノードプレート433は、それぞれ、上側板状部材および下側板状部材を兼ねている。 [Fourth Embodiment]
(Configuration of fuel cell)
With reference to FIG. 8, the structure of thefuel cell 400 by 4th Embodiment is demonstrated. In the fuel cell 400 according to the fourth embodiment, the cathode plate 431 and the anode plate 433 also serve as an upper plate member and a lower plate member, respectively.
(燃料電池の構成)
図8を参照して、第4実施形態による燃料電池400の構成について説明する。第4実施形態による燃料電池400では、カソードプレート431およびアノードプレート433は、それぞれ、上側板状部材および下側板状部材を兼ねている。 [Fourth Embodiment]
(Configuration of fuel cell)
With reference to FIG. 8, the structure of the
図8に示すように、燃料電池400では、セルスタック20を挟み込むようにセルスタック20の上面側および下面側に、それぞれ、セルスタック20から電力を取り出すためのカソードプレート431およびアノードプレート433が設けられている。そして、セルスタック20を挟んだ状態で、カソードプレート431およびアノードプレート433が、締結部材440の引張力により固定されている。すなわち、燃料電池400では、上記第1~第3実施形態と異なり、カソードプレート431およびアノードプレート433が締結部材440により固定される上側板状部材および下側板状部材を兼ねている。なお、カソードプレート431およびアノードプレート433は、それぞれ、特許請求の範囲の「一方側電力取出し部」および「他方側電極取出し部」の一例である。また、締結部材440の構成は、上記第1~第3実施形態の締結部材のいずれかの構成と同様である。
As shown in FIG. 8, in the fuel cell 400, a cathode plate 431 and an anode plate 433 for taking out electric power from the cell stack 20 are provided on the upper surface side and the lower surface side of the cell stack 20 so as to sandwich the cell stack 20, respectively. It has been. The cathode plate 431 and the anode plate 433 are fixed by the tensile force of the fastening member 440 with the cell stack 20 interposed therebetween. That is, in the fuel cell 400, unlike the first to third embodiments, the cathode plate 431 and the anode plate 433 serve as an upper plate member and a lower plate member to which the fastening member 440 is fixed. The cathode plate 431 and the anode plate 433 are examples of “one side power extraction portion” and “the other side electrode extraction portion” in the claims, respectively. The configuration of the fastening member 440 is the same as the configuration of any of the fastening members of the first to third embodiments.
(第4実施形態の効果)
第4実施形態では、以下のような効果を得ることができる。 (Effect of 4th Embodiment)
In the fourth embodiment, the following effects can be obtained.
第4実施形態では、以下のような効果を得ることができる。 (Effect of 4th Embodiment)
In the fourth embodiment, the following effects can be obtained.
第4実施形態では、上記のように、カソードプレート431およびアノードプレート433は、それぞれ、上側板状部材および下側板状部材を兼ねている。これにより、カソードプレート431およびアノードプレート433が、それぞれ、上側板状部材および下側板状部材を兼ねているので、部品点数を削減することができる。
In the fourth embodiment, as described above, the cathode plate 431 and the anode plate 433 also serve as an upper plate member and a lower plate member, respectively. Thereby, since the cathode plate 431 and the anode plate 433 also serve as the upper plate member and the lower plate member, respectively, the number of parts can be reduced.
[変形例]
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。 [Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.
なお、今回開示された実施形態は、すべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した実施形態の説明ではなく特許請求の範囲によって示され、さらに特許請求の範囲と均等の意味および範囲内でのすべての変更(変形例)が含まれる。 [Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.
たとえば、上記第1~第4実施形態では、燃料電池が、固体酸化物形燃料電池(SOFC)である例を示したが、本発明はこれに限られない。たとえば、燃料電池が、固体酸化物形燃料電池以外の燃料電池である、固体高分子形燃料電池(PEFC:Polymer Electrolyte Fuel Cell)、りん酸形燃料電池(PAFC:Phosphoric Acid Fuel Cell)、溶融炭酸塩形燃料電池(MCFC:Molten Carbonate Fuel Cell)などでもよい。
For example, in the first to fourth embodiments, the fuel cell is a solid oxide fuel cell (SOFC). However, the present invention is not limited to this. For example, the fuel cell is a fuel cell other than a solid oxide fuel cell, such as a polymer electrolyte fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), a molten carbonic acid fuel cell. A salt fuel cell (MCFC: Molten Carbonate Fuel Cell) may be used.
また、上記第1実施形態では、第2締結部分42と接続部分43との間に絶縁部材45が設けられる例を示したが、本発明はこれに限られない。たとえば、図9に示す第1実施形態の変形例による燃料電池500の締結部材540のように、絶縁部材45が設けられていなくてもよい。なお、締結部材540では、第2締結部分542の頭部分542aは、略半球形状を有する。また、締結部材540では、絶縁部材45を設けない分、略円筒状の接続部分543の直径を小さくすることができる。なお、燃料電池500のその他の構成は、上記第1実施形態と同様である。
In the first embodiment, the example in which the insulating member 45 is provided between the second fastening portion 42 and the connection portion 43 is shown, but the present invention is not limited to this. For example, the insulating member 45 may not be provided like the fastening member 540 of the fuel cell 500 according to the modification of the first embodiment shown in FIG. In the fastening member 540, the head portion 542a of the second fastening portion 542 has a substantially hemispherical shape. Further, in the fastening member 540, the diameter of the substantially cylindrical connection portion 543 can be reduced by the amount that the insulating member 45 is not provided. The other configuration of the fuel cell 500 is the same as that of the first embodiment.
また、上記第1実施形態では、第1締結部分41が下側板状部材36に締結され、第2締結部分42が上側板状部材35に締結される例を示したが、本発明はこれに限られない。たとえば、図4に示す第1実施形態の締結部材40が上下反転された状態で、上側板状部材35と下側板状部材36との間に配置されていてもよい。同様に、図6に示す第2実施形態の締結部材240が上下反転された状態で、上側板状部材35と下側板状部材36との間に配置されていてもよい。
In the first embodiment, the example in which the first fastening portion 41 is fastened to the lower plate-like member 36 and the second fastening portion 42 is fastened to the upper plate-like member 35 has been described. Not limited. For example, the fastening member 40 of the first embodiment shown in FIG. 4 may be disposed between the upper plate member 35 and the lower plate member 36 in a state where the fastening member 40 is turned upside down. Similarly, the fastening member 240 of the second embodiment shown in FIG. 6 may be disposed between the upper plate member 35 and the lower plate member 36 in a state where the fastening member 240 is turned upside down.
また、上記第2実施形態では、接続部分243が略U字形状を有する例を示したが、本発明はこれに限られない。たとえば、図10に示す第2実施形態の変形例による燃料電池700の締結部材740のように、接続部分743が略円環形状を有していてもよい。なお、燃料電池700のその他の構成は、上記第2実施形態と同様である。
In the second embodiment, an example in which the connection portion 243 has a substantially U shape is shown, but the present invention is not limited to this. For example, like the fastening member 740 of the fuel cell 700 according to the modification of the second embodiment shown in FIG. 10, the connection portion 743 may have a substantially annular shape. The other configuration of the fuel cell 700 is the same as that of the second embodiment.
また、上記第3実施形態では、接続部分343が略円環形状を有する例を示したが、本発明はこれに限られない。たとえば、図11に示す第3実施形態の変形例による燃料電池800の締結部材840のように、接続部分843が略円筒形状を有していてもよい。なお、燃料電池800のその他の構成は、上記第3実施形態と同様である。
In the third embodiment, the connection portion 343 has a substantially annular shape, but the present invention is not limited to this. For example, like the fastening member 840 of the fuel cell 800 according to the modification of the third embodiment shown in FIG. 11, the connection portion 843 may have a substantially cylindrical shape. The other configuration of the fuel cell 800 is the same as that of the third embodiment.
また、上記第1~第4実施形態では、第1締結部分および第2締結部分は、共に、略柱形状を有している例を示したが、本発明はこれに限られない。本発明では、第1締結部分および第2締結部分は略柱形状以外の形状でもよい。
In the first to fourth embodiments, the first fastening portion and the second fastening portion both have substantially columnar shapes, but the present invention is not limited to this. In the present invention, the first fastening portion and the second fastening portion may have a shape other than a substantially columnar shape.
また、上記第4実施形態では、カソードプレート431およびアノードプレート433は、それぞれ、上側板状部材および下側板状部材を兼ねている例を示したが、本発明はこれに限られない。たとえば、図12に示す第4実施形態の変形例による燃料電池900のように、アノードプレート433のみが、下側板状部材を兼ねていてもよい。また、カソードプレート431(図8参照)のみが、上側板状部材を兼ねていてもよい。
In the fourth embodiment, the cathode plate 431 and the anode plate 433 have been shown to serve as the upper plate member and the lower plate member, respectively, but the present invention is not limited to this. For example, like the fuel cell 900 according to the modification of the fourth embodiment shown in FIG. 12, only the anode plate 433 may also serve as the lower plate member. Further, only the cathode plate 431 (see FIG. 8) may also serve as the upper plate member.
また、上記第1~第4実施形態では、上側板状部材、下側板状部材および締結部材は、上側押圧部材、下側押圧部材および固定部材とは別個に設けられている例を示したが、本発明はこれに限られない。たとえば、図13に示す第1~第4実施形態の変形例による燃料電池1000のように、上側押圧部材51および下側押圧部材52を固定するタイロッド1001に締結部材1040を設けてもよい。なお、締結部材1040の構成は、上記第1~第3実施形態(および変形例)の締結部材のいずれかの構成と同様である。
In the first to fourth embodiments, the upper plate member, the lower plate member, and the fastening member are provided separately from the upper pressing member, the lower pressing member, and the fixing member. The present invention is not limited to this. For example, the fastening member 1040 may be provided on the tie rod 1001 that fixes the upper pressing member 51 and the lower pressing member 52 as in the fuel cell 1000 according to the modification of the first to fourth embodiments shown in FIG. The configuration of the fastening member 1040 is the same as that of any of the fastening members of the first to third embodiments (and modifications).
10 セル
20 セルスタック
31、431 カソードプレート(一方側電力取出し部)
33、433 アノードプレート(他方側電極取出し部)
35 上側板状部材
36 下側板状部材
40、240、340、440、540、740、840、940、1040 締結部材
41、241、341、641 第1締結部分
42、242、342、542 第2締結部分
43、243、343、543、743、843 接続部分
43c、243c、343c、343d 内側面(係止部)
45、245、345 絶縁部材
51 上側押圧部材
52 下側押圧部材
53 タイロッド(固定部材)
100、200、300、400、500、700、800、900、1000 燃料電池 10cells 20 cell stacks 31 and 431 Cathode plate (one side power extraction part)
33, 433 Anode plate (extraction part on the other side)
35 Upper plate-like member 36 Lower plate- like member 40, 240, 340, 440, 540, 740, 840, 940, 1040 Fastening member 41, 241, 341, 641 First fastening portion 42, 242, 342, 542 Second fastening Portions 43, 243, 343, 543, 743, 843 Connection portions 43c, 243c, 343c, 343d Inner side surface (locking portion)
45, 245, 345 Insulatingmember 51 Upper pressing member 52 Lower pressing member 53 Tie rod (fixing member)
100, 200, 300, 400, 500, 700, 800, 900, 1000 Fuel cell
20 セルスタック
31、431 カソードプレート(一方側電力取出し部)
33、433 アノードプレート(他方側電極取出し部)
35 上側板状部材
36 下側板状部材
40、240、340、440、540、740、840、940、1040 締結部材
41、241、341、641 第1締結部分
42、242、342、542 第2締結部分
43、243、343、543、743、843 接続部分
43c、243c、343c、343d 内側面(係止部)
45、245、345 絶縁部材
51 上側押圧部材
52 下側押圧部材
53 タイロッド(固定部材)
100、200、300、400、500、700、800、900、1000 燃料電池 10
33, 433 Anode plate (extraction part on the other side)
35 Upper plate-
45, 245, 345 Insulating
100, 200, 300, 400, 500, 700, 800, 900, 1000 Fuel cell
Claims (11)
- 複数のセルが積層されたセルスタックと、
前記セルスタックを挟み込むように前記セルスタックの上面側および下面側にそれぞれ設けられる上側板状部材および下側板状部材と、
前記セルスタックを挟み込んだ状態で、前記上側板状部材と前記下側板状部材とを締結するとともに、締結に伴う引張力により前記セルスタックに対して複数の前記セルの積層方向に加圧力を付与する前記上側板状部材と前記下側板状部材とを固定し、温度上昇に伴い前記セルスタックよりも前記積層方向に大きく膨張して伸長する締結部材とを備え、
前記締結部材は、前記伸長により、前記引張力を軽減または前記引張力を解除する係止部を有する、燃料電池。 A cell stack in which a plurality of cells are stacked;
An upper plate member and a lower plate member provided on the upper surface side and the lower surface side of the cell stack, respectively, so as to sandwich the cell stack;
The upper plate member and the lower plate member are fastened with the cell stack sandwiched therebetween, and a pressing force is applied to the cell stack in the stacking direction of the cells by a tensile force accompanying the fastening. Fixing the upper plate member and the lower plate member, and a fastening member that expands and expands more in the stacking direction than the cell stack as the temperature rises,
The said fastening member is a fuel cell which has the latching | locking part which reduces the said tensile force or cancels | releases the said tensile force by the said expansion | extension. - 前記セルスタックは、複数設けられており、
前記上側板状部材、前記下側板状部材および前記締結部材は、前記セルスタック毎に設けられている、請求項1に記載の燃料電池。 A plurality of the cell stacks are provided,
The fuel cell according to claim 1, wherein the upper plate member, the lower plate member, and the fastening member are provided for each cell stack. - 前記締結部材は、前記下側板状部材に取り付けられる第1締結部分と、前記上側板状部材に取り付けられる第2締結部分と、前記第1締結部分および前記第2締結部分が挿通され、前記第1締結部分および前記第2締結部分を接続するとともに前記係止部を有する接続部分とを含み、
前記第1締結部分および前記第2締結部分のうちの一方が、前記接続部分に締め付けられるか、または、前記下側板状部材または前記上側板状部材に締め付けられることにより、前記セルスタックを挟んだ状態で前記引張力により前記上側板状部材と前記下側板状部材とを固定するとともに、前記第1締結部分および前記第2締結部分の少なくとも他方は、前記接続部分の前記係止部に対する係止状態を解除可能に構成されている、請求項1に記載の燃料電池。 The fastening member is inserted through the first fastening portion attached to the lower plate-like member, the second fastening portion attached to the upper plate-like member, the first fastening portion and the second fastening portion, A connection portion that connects the first fastening portion and the second fastening portion and has the locking portion,
One of the first fastening part and the second fastening part is clamped to the connection part, or clamped to the lower plate member or the upper plate member, thereby sandwiching the cell stack The upper plate member and the lower plate member are fixed by the tensile force in a state, and at least the other of the first fastening portion and the second fastening portion is locked to the locking portion of the connection portion. The fuel cell according to claim 1, wherein the fuel cell is configured to be able to be released. - 前記第1締結部分および前記第2締結部分の少なくとも他方と、前記接続部分との間に設けられ、前記第1締結部分および前記第2締結部分の少なくとも他方と前記接続部分とを絶縁するための絶縁部材をさらに備える、請求項3に記載の燃料電池。 Provided between at least the other of the first fastening portion and the second fastening portion and the connecting portion, and for insulating at least the other of the first fastening portion and the second fastening portion from the connecting portion. The fuel cell according to claim 3, further comprising an insulating member.
- 前記第1締結部分および前記第2締結部分のうちの一方が、前記接続部分に締め付けられることにより、前記上側板状部材と前記下側板状部材との間に前記セルスタックを固定するとともに、前記第1締結部分および前記第2締結部分の他方は、前記接続部分の前記係止部に対する係止状態を解除可能に構成されている、請求項3に記載の燃料電池。 One of the first fastening portion and the second fastening portion is fastened to the connection portion, thereby fixing the cell stack between the upper plate member and the lower plate member, and 4. The fuel cell according to claim 3, wherein the other of the first fastening portion and the second fastening portion is configured to be able to release the locked state of the connecting portion with respect to the locking portion.
- 前記第1締結部分および前記第2締結部分のうちの一方が、前記上側板状部材または前記下側板状部材に締め付けられることにより、前記上側板状部材と前記下側板状部材との間に前記セルスタックを固定するとともに、前記第1締結部分および前記第2締結部分の両方が、前記接続部分の前記係止部に対する係止状態を解除可能に構成されている、請求項3に記載の燃料電池。 One of the first fastening portion and the second fastening portion is fastened to the upper plate-like member or the lower plate-like member, so that the upper plate-like member and the lower plate-like member are interposed between the upper plate-like member and the lower plate-like member. The fuel according to claim 3, wherein the cell stack is fixed, and both the first fastening portion and the second fastening portion are configured to be able to release the locked state of the connection portion with respect to the locking portion. battery.
- 前記第1締結部分および前記第2締結部分は、共に、略柱形状を有している、請求項3に記載の燃料電池。 The fuel cell according to claim 3, wherein both the first fastening portion and the second fastening portion have a substantially columnar shape.
- 前記接続部分は、略円筒形状、略U字形状、または、略環形状を有し、
前記第1締結部分および前記第2締結部分が、それぞれ、略円筒形状、略U字形状、または、略環形状を有する前記接続部分の一方端側および他方端側から前記接続部分に挿通されている、請求項3に記載の燃料電池。 The connecting portion has a substantially cylindrical shape, a substantially U-shape, or a substantially ring shape,
The first fastening portion and the second fastening portion are respectively inserted into the connection portion from one end side and the other end side of the connection portion having a substantially cylindrical shape, a substantially U shape, or a substantially ring shape. The fuel cell according to claim 3. - 前記セルスタックを挟み込むように前記セルスタックの上面側および下面側にそれぞれ設けられ、前記セルスタックから電力を取り出すための一方側電力取出し部および他方側電極取出し部をさらに備え、
前記上側板状部材および前記下側板状部材は、前記一方側電力取出し部および前記他方側電極取出し部とは別個に設けられている、請求項1に記載の燃料電池。 Provided on each of the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, further comprising a one-side power extraction unit and another electrode extraction unit for extracting power from the cell stack,
2. The fuel cell according to claim 1, wherein the upper plate member and the lower plate member are provided separately from the one-side power extraction portion and the other-side electrode extraction portion. - 前記セルスタックを挟み込むように前記セルスタックの上面側および下面側にそれぞれ設けられ、前記セルスタックから電力を取り出すための一方側電力取出し部および他方側電極取出し部をさらに備え、
前記一方側電力取出し部および前記他方側電極取出し部は、それぞれ、前記上側板状部材および前記下側板状部材を兼ねている、請求項1に記載の燃料電池。 Provided on each of the upper surface side and the lower surface side of the cell stack so as to sandwich the cell stack, further comprising a one-side power extraction unit and another electrode extraction unit for extracting power from the cell stack,
2. The fuel cell according to claim 1, wherein the one-side power extraction portion and the other-side electrode extraction portion also serve as the upper plate member and the lower plate member, respectively. - 前記セルスタックの使用時に、前記セルスタックを挟み込んで押圧するように前記セルスタックの上面側および下面側にそれぞれ設けられる上側押圧部材および下側押圧部材と、
前記セルスタックを挟み込んだ状態で、前記上側押圧部材および前記下側押圧部材を固定する固定部材とをさらに備え、
前記上側板状部材、前記下側板状部材および前記締結部材は、前記上側押圧部材、前記下側押圧部材および前記固定部材とは別個に設けられている、請求項1に記載の燃料電池。 When using the cell stack, an upper pressing member and a lower pressing member respectively provided on the upper surface side and the lower surface side of the cell stack so as to sandwich and press the cell stack,
In a state of sandwiching the cell stack, further comprising a fixing member that fixes the upper pressing member and the lower pressing member,
The fuel cell according to claim 1, wherein the upper plate member, the lower plate member, and the fastening member are provided separately from the upper pressing member, the lower pressing member, and the fixing member.
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JP6363817B1 (en) | 2018-07-25 |
JPWO2018131330A1 (en) | 2019-01-17 |
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