WO2018066094A1 - 枠体、セルフレーム、セルスタック、およびレドックスフロー電池 - Google Patents
枠体、セルフレーム、セルスタック、およびレドックスフロー電池 Download PDFInfo
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- WO2018066094A1 WO2018066094A1 PCT/JP2016/079679 JP2016079679W WO2018066094A1 WO 2018066094 A1 WO2018066094 A1 WO 2018066094A1 JP 2016079679 W JP2016079679 W JP 2016079679W WO 2018066094 A1 WO2018066094 A1 WO 2018066094A1
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- frame
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- cross
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- shape
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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
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/70—Arrangements for stirring or circulating the electrolyte
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0247—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the form
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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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
- H01M8/242—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes comprising framed electrodes or intermediary frame-like gaskets
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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
- H01M8/2455—Grouping of fuel cells, e.g. stacking of fuel cells with liquid, solid or electrolyte-charged reactants
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8684—Negative electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8689—Positive electrodes
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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
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a frame, a cell frame, a cell stack, and a redox flow battery.
- a cell frame having a bipolar plate, a positive electrode, a diaphragm, a negative electrode, and a cell frame are stacked, a cell stack in which the stacked body is sandwiched between supply and discharge plates, and a redox using the cell stack A flow battery is described.
- the cell frame includes a bipolar plate and a frame body disposed on the outer periphery of the bipolar plate. In this configuration, one cell is formed between the bipolar plates of adjacent cell frames.
- the frame of the present disclosure is: A frame used for a cell frame of a redox flow battery,
- the frame has an outer periphery,
- the outer peripheral portion has a thin region that gradually becomes thinner from the center of the frame toward the outer periphery of the frame.
- the cell frame of the present disclosure is A frame of the present disclosure, and a bipolar plate supported by the frame.
- the cell stack of the present disclosure is The cell frame of the present disclosure is provided.
- the redox flow battery of the present disclosure is The cell stack of the present disclosure is provided.
- FIG. 3 is an operation principle diagram of the redox flow battery according to Embodiment 1.
- FIG. 1 is a schematic configuration diagram of a redox flow battery according to Embodiment 1.
- FIG. 1 is a schematic configuration diagram of a cell stack according to Embodiment 1.
- FIG. 3 is a plan view of a cell frame according to Embodiment 1.
- FIG. 2 is a partial longitudinal sectional view of a cell stack according to Embodiment 1.
- FIG. 6 is a partial longitudinal sectional view of a cell stack according to Embodiment 2.
- FIG. 6 is a partial longitudinal sectional view of a cell stack according to Embodiment 3.
- FIG. 6 is a partial longitudinal sectional view of a cell stack according to Embodiment 4.
- FIG. 9 is a partial longitudinal sectional view of a cell stack according to a fifth embodiment.
- FIG. 10 is a partial longitudinal sectional view of a cell stack according to a sixth embodiment.
- FIG. 10 is a plan view of a cell frame according to a seventh embodiment.
- FIG. 10 is a plan view of a cell frame according to an eighth embodiment.
- 10 is a plan view of a cell frame according to Embodiment 9. FIG.
- the cross-sectional shape along the thickness direction of the outer periphery when viewed in plan is a rectangle. Therefore, when laminating a plurality of cell frames, and when tightening a plurality of laminated cell frames, the corners constituting the outer edge of the frame body of one adjacent cell frame are connected to the frame body of the other cell frame. It may be damaged. Since the cell frame of the cell stack is often manufactured by injection molding in which a resin is injected into a mold, there is a risk of cracking due to damage by the corners.
- an object of the present disclosure is to provide a frame body and a cell frame that are less likely to be damaged during lamination or tightening. Another object of the present disclosure is to provide a cell stack in which the stacked cell frames are hardly damaged. Furthermore, an object of the present disclosure is to provide a redox flow battery including a cell stack in which a cell frame is hardly damaged.
- the frame according to the embodiment is A frame used for a cell frame of a redox flow battery,
- the frame has an outer periphery,
- the outer peripheral portion has a thin region that gradually becomes thinner from the center of the frame toward the outer periphery of the frame.
- the portion constituting the outer end of the frame of one adjacent cell frame is the other cell. It is possible to suppress the other cell frame from being damaged by contacting the frame body. As a result, it is possible to avoid problems associated with damage to the frame body of the cell frame, for example, problems such as leakage of electrolyte from between adjacent cell frames.
- a thin region may be formed over the entire circumference of the outer peripheral portion, or a thin region may be formed in part.
- the cross-sectional shape of the thin region may include a pencil down shape.
- the cross-sectional shape of the thin region By making the cross-sectional shape of the thin region a pencil-down shape, the part constituting the outer edge of the frame body of one adjacent cell frame contacts the frame body of the other cell frame and the other cell frame is damaged. This can be effectively suppressed.
- the cross-sectional shape of the thin region is a shape in which a rectangular corner is rounded off. Can do.
- the part constituting the outer edge of the frame of one adjacent cell frame is in contact with the frame of the other cell frame. It is possible to effectively suppress the other cell frame from being damaged.
- the cross-sectional shape of the thin region is a shape in which a rectangular corner is chamfered. Can do.
- the portion constituting the outer edge of the frame body of one adjacent cell frame is in contact with the frame body of the other cell frame. It is possible to effectively suppress the other cell frame from being damaged.
- the cross-sectional shape of the thin-walled region may include only a curved line.
- the part constituting the outer edge of the frame of one adjacent cell frame contacts the frame of the other cell frame and the other cell frame is damaged. It can be effectively suppressed.
- the cell frame according to the embodiment is The frame which concerns on embodiment, and the bipolar plate supported by the said frame are provided.
- the portion constituting the outer edge of the frame body of one adjacent cell frame is the other cell. It is possible to suppress the other cell frame from being damaged by contacting the frame body. As a result, it is possible to avoid problems associated with damage to the frame body of the cell frame, for example, problems such as leakage of electrolyte from between adjacent cell frames.
- the cell stack according to the embodiment is A cell frame according to the embodiment is provided.
- the stacked cell frame which is one of the constituent elements is hardly damaged. Therefore, when the redox flow battery is configured using the cell stack of the embodiment, problems associated with cell frame damage, for example, problems such as leakage of electrolyte from between adjacent cell frames can be avoided.
- the redox flow battery according to the embodiment is The cell stack according to the embodiment is provided.
- the redox flow battery according to the embodiment is a redox flow battery including a cell stack in which the cell frame is hardly damaged. Therefore, the redox flow battery according to the embodiment is a redox flow battery capable of avoiding problems associated with cell frame damage, for example, problems such as leakage of electrolyte from adjacent cell frames.
- the RF battery is one of electrolyte circulation type storage batteries, and is used for storing new energy such as solar power generation and wind power generation.
- the RF battery 1 includes a redox potential of active material ions contained in the positive electrode electrolyte and a redox potential of active material ions contained in the negative electrode electrolyte. It is a battery which charges / discharges using the difference with this.
- the RF battery 1 includes a cell 100 separated into a positive electrode cell 102 and a negative electrode cell 103 by a diaphragm 101 that transmits hydrogen ions.
- a positive electrode 104 is built in the positive electrode cell 102 and a positive electrode electrolyte tank 106 for storing a positive electrode electrolyte is connected via conduits 108 and 110.
- the conduit 108 is provided with a pump 112, and these members 106, 108, 110, 112 constitute a positive electrode circulation mechanism 100P that circulates the positive electrode electrolyte.
- a negative electrode electrode 105 is built in the negative electrode cell 103, and a negative electrode electrolyte solution tank 107 that stores a negative electrode electrolyte is connected via conduits 109 and 111.
- the conduit 109 is provided with a pump 113, and these members 107, 109, 111, 113 constitute a negative electrode circulation mechanism 100N for circulating the negative electrode electrolyte.
- the electrolyte stored in the tanks 106 and 107 is circulated in the cells 102 and 103 by the pumps 112 and 113 during charging and discharging. When charging / discharging is not performed, the pumps 112 and 113 are stopped and the electrolytic solution is not circulated.
- the cell 100 is usually formed inside a structure called a cell stack 2 as shown in FIGS.
- the cell stack 2 is configured by sandwiching a laminated structure called a sub stack 200 (FIG. 3) between two end plates 210 and 220 from both sides and tightening with a tightening mechanism 230 (illustrated in FIG. 3).
- the configuration uses a plurality of substacks 200).
- the sub-stack 200 (FIG. 3) includes a stack of a plurality of cell frames 3, positive electrodes 104, diaphragms 101, negative electrodes 105, and cell frames 3, and the stacked bodies are fed and discharged plates 190 and 190 (see the lower diagram of FIG. The structure is sandwiched in (omitted in FIG. 2).
- the cell frame 3 includes a frame body 32 having a through window and a bipolar plate 31 that closes the through window.
- the cell plate 3 is disposed so that the positive electrode 104 is in contact with one surface side of the bipolar plate 31.
- the negative electrode 105 is disposed so as to contact. In this configuration, one cell 100 is formed between the bipolar plates 31 of the adjacent cell frames 3.
- Distribution of the electrolyte solution to the cell 100 through the supply / discharge plates 190 and 190 is performed by the supply manifolds 33 and 34 and the discharge manifolds 35 and 36 formed in the cell frame 3.
- the positive electrode electrolyte is supplied from the liquid supply manifold 33 to the positive electrode 104 through an inlet slit formed on one side (the front side of the paper) of the cell frame 3, and the outlet slit formed in the upper part of the cell frame 3 Through the drainage manifold 35.
- the negative electrode electrolyte is supplied from the liquid supply manifold 34 to the negative electrode 105 through an inlet slit (shown by a broken line) formed on the other surface side (back side of the paper surface) of the cell frame 3.
- the liquid is discharged to the drainage manifold 36 through an outlet slit (shown by a broken line) formed in the upper portion of the liquid.
- An annular seal member 37 such as an O-ring or a flat packing is disposed between the cell frames 3, and leakage of the electrolyte from the sub stack 200 is suppressed.
- the frame body 32 of the cell frame 3 is an injection molded body manufactured by injection molding.
- the cross-sectional shape on the outer peripheral edge side of the frame body 32 is rectangular, when the plurality of cell frames 3 are stacked, the rectangular corner portion constituting the outer end of the frame body 32 of one adjacent cell frame 3 is the other.
- the frame 32 of the other cell frame 3 may be damaged by coming into contact with the frame 32 of the other cell frame 3. If damage such as breakage of the frame 32 of the cell frame 3 occurs, there is a possibility that a problem such as leakage of electrolyte from the cell stack 2 may occur.
- a thin region is provided in the cell frame 3 provided in the cell stack 2. Details of the thin region will be described with reference to FIGS.
- FIG. 4 is a plan view of the cell frame 3 of the first embodiment.
- the vertical direction of the paper surface in FIG. 4 which is the direction in which the liquid supply manifold 33 (34) and the liquid discharge manifold 36 (35) are separated from each other, is the length direction of the frame body 32.
- the horizontal direction of the paper surface which is the direction in which the liquid supply manifold 34 is separated, is the width direction of the frame body 32
- the depth direction of the paper surface is the thickness direction of the frame body 32.
- a seal groove 37s surrounding the outer periphery of the manifolds 33 to 36 of the cell frame 3 is a groove for fitting the seal member 37 of FIG.
- the shapes and positions of the manifolds 33 to 36 shown in FIG. 4 and the shapes and arrangements of the inlet and outlet slits extending from the manifolds 33 to 36 toward the bipolar plate 31 are merely examples, and are not particularly limited.
- a frame 32 of the cell frame 3 of the present embodiment shown in FIG. 4 has a thin region 30 (region on the outer end side with respect to the two-dot chain line) having a predetermined width from the outer end to the inward when viewed in plan. Is provided.
- the thin region 30 is a region that gradually becomes thinner from the formation start position (the position of the two-dot chain line) on the center side of the cell frame 3 toward the outer end.
- the width of the thin region 30, that is, the distance from the position of the two-dot chain line to the outer end is preferably 0.1 mm or more and 100 mm or less, more preferably 1 mm or more and 80 mm or less, and 5 mm or more and 50 mm or less.
- the frame body 32 of the cell frame 3 By providing the thin region 30 in the frame body 32 of the cell frame 3, when the plurality of cell frames 3 are stacked or when the stacked cell frames 3 are tightened, the frame body 32 of one of the adjacent cell frames 3 It can suppress that the part which comprises an outer end contacts the frame 32 of the other cell frame 3, and the other cell frame 3 is damaged. As a result, problems associated with damage to the frame 32 of the cell frame 3, for example, problems such as leakage of electrolyte from between adjacent cell frames 3 can be avoided.
- the cross-sectional shape of the thin region 30 along the thickness direction of the cell frame 3 is not particularly limited as long as the cross-sectional shape gradually becomes thinner toward the outer end.
- An example of the cross-sectional shape of the thin region 30 will be described with reference to FIG.
- FIG. 5 shows a part of the cut surface taken along the dashed line (part of the cut surface along the thickness direction of the frame 32 through the center of the frame 32) shown by the alternate long and short dash line in FIG.
- the cross-sectional shape of the thin region 30 is formed in a pencil down shape.
- the pencil down shape is a tapered shape similar to the tip of a pencil.
- the tip of the pencil down shape is rounded. Therefore, the length L1 from the formation start position of the thin region 30 to the outer end in the direction along the plane of the cell frame 3 is the length from the formation start position of the thin region 30 to the outer end in the thickness direction of the cell frame 3. It is longer than L2.
- the length L1 is not particularly limited as long as it is 5 mm or more shorter than the length from the outer end to the sealing groove 37 s shown in FIG.
- the length L2 is not particularly limited as long as it is 1 ⁇ 2 or less of the thickness of the cell frame 3, and is preferably 0.1 mm or more and 2.5 mm or less, and more preferably 1 mm or more and 1.5 mm or less. It is preferable.
- the joint portion (see the white arrow) between the thin region 30 and the flat portion is a curved surface (curved in the cross section).
- the cross-sectional shape of the thin region 30 is formed in a shape in which a rectangular corner (see dotted line) is chamfered.
- the value of the chamfer radius R is not particularly limited as long as it is 1 ⁇ 2 or less of the thickness of the cell frame 3.
- the chamfer radius R is preferably 0.1 mm to 2.5 mm, and more preferably 1.0 mm to 1.5 mm.
- the cross-sectional shape of the thin region 30 is formed in a shape in which a rectangular corner (see dotted line) is chamfered.
- the value of the chamfer length C is not particularly limited as long as it is 1 ⁇ 2 or less of the thickness of the cell frame 3.
- the chamfer length C is preferably 0.1 mm or more and 2.5 mm or less, and more preferably 1.0 mm or more and 1.5 mm or less.
- the joint portion (see the white arrow) between the thin region 30 and the flat portion is a curved surface (curved in the cross section).
- a cell stack 2 including a cell frame 3 in which the cross-sectional shape of the thin region 30 is formed only by a curve will be described with reference to FIG.
- the cross-sectional shape of the thin region 30 is formed in a semicircular (that is, curved) shape. Also with this configuration, it is possible to prevent the joint portion of one adjacent cell frame 3 from damaging the other cell frame 3.
- the cross-sectional shape of the thin region 30 is configured only by a curve
- the cross-sectional shape is not limited to a semicircular shape.
- the cross-sectional shape may be a semi-elliptical shape or a shape obtained by rounding the pencil-down linear portion of FIG.
- the formation width of the thin region 30 (the length from the formation start position of the thin region 30 to the outer end) is the same.
- the formation width of the thin region 30 of each cell frame 3 is different.
- the formation width of the thin region 30 of the adjacent cell frame 3 is different. Therefore, damage to adjacent cell frames 3 can be suppressed.
- the thin area 30 of the left and right cell frames 3 has a C-chamfered shape
- the thin area 30 of the middle cell frame 3 has a pencil down shape, but is not limited to this combination.
- the cell stack 2 can be configured by appropriately combining the cell frames 3 of the first to fifth embodiments.
- the shape of the cell frame 3 is not limited to the shape shown in FIG. 4, and may be the shape shown in FIG. 11, for example.
- the slits 33s, 34s, 35s, and 36s provided in the frame 32 are substantially J-shaped. Specifically, after extending outward from the lateral position of the bipolar plate 31, the bipolar plate 31 is bent inward and connected to the manifolds 33, 34, 35, and 36.
- the shape of the cell frame 3 can also be the shape shown in FIG. In the cell frame 3 of FIG. 12, slits 33 s, 34 s, 35 s, 36 s provided in the frame body 32 are curved in a complicated manner in the vertical direction and the horizontal direction and connected to the manifolds 33, 34, 35, 36.
- the shape of the cell frame 3 can also be the shape shown in FIG. In the cell frame 3 of FIG. 13, slits that connect the manifolds 33, 34, 35, 36 to the bipolar plate 31 are not formed. Instead, a slit is formed in the gasket 39 disposed between the adjacent cell frames 3.
- the gasket 39 in FIG. 13 is a gasket 39 that is stacked on the front side of the cell frame 3 in the drawing.
- the gasket 39 is provided with manifolds 33, 34, 35, 36, a notched inlet slit 33 s connected to the manifold 33, and a notched outlet slit 35 s connected to the manifold 35.
- the gasket 39 stacked on the back side of the paper surface of the cell frame 3 includes manifolds 33, 34, 35, 36, a notch-shaped inlet slit 34 s connected to the manifold 34, and a notch shape connected to the manifold 36. Outlet slits 36s.
- the cell frame 3 has been described in which the length of the frame body 32 in the width direction (left and right direction in the drawing) is larger than the length of the frame body 32 in the length direction (up and down direction in the drawing).
- a cell frame having a larger length direction than the width direction can be used.
- a cell frame having the same length in the length direction and the width direction may be used.
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Abstract
Description
レドックスフロー電池のセルフレームに用いられる枠体であり、
前記枠体は、外周部を有し、
前記外周部は、前記枠体の中心から前記枠体の外周に向かうに従って徐々に薄肉となる薄肉領域を有する。
本開示の枠体と、前記枠体に支持される双極板と、を備える。
本開示のセルフレームを備える。
本開示のセルスタックを備える。
従来のセルフレームの枠体では、平面視したときの外周部の厚み方向に沿った断面形状は矩形であった。そのため、複数のセルフレームを積層するとき、および積層した複数のセルフレームを締め付けるときなど、隣接する一方のセルフレームの枠体の外端を構成する角部が、他方のセルフレームの枠体を損傷する場合がある。セルスタックのセルフレームは、金型内に樹脂を射出する射出成形で製造されることが多いため、上記角部による損傷によって割れる恐れもある。
本開示の枠体およびセルフレームによれば、積層時に損傷し難い。また、本開示のセルスタックおよびレドックスフロー電池によれば、これらを構成するセルフレームの枠体に損傷が生じ難い。
最初に本願発明の実施形態の内容を列記して説明する。
レドックスフロー電池のセルフレームに用いられる枠体であり、
前記枠体は、外周部を有し、
前記外周部は、前記枠体の中心から前記枠体の外周に向かうに従って徐々に薄肉となる薄肉領域を有する。
前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、ペンシルダウン形状を備える形態を挙げることができる。
前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、矩形の角部がR面取りされた形状である形態を挙げることができる。
前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、矩形の角部がC面取りされた形状である形態を挙げることができる。
前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は曲線のみで構成されている形態を挙げることができる。
実施形態に係る枠体と、前記枠体に支持される双極板と、を備える。
実施形態に係るセルフレームを備える。
実施形態に係るセルスタックを備える。
以下、実施形態に係るレドックスフロー電池(RF電池)の実施形態を説明する。なお、本発明は実施形態に示される構成に限定されるわけではなく、請求の範囲によって示され、請求の範囲と均等の意味および範囲内の全ての変更が含まれることを意図する。
実施形態1に係るRF電池を図1~図5に基づいて説明する。
RF電池は、電解液循環型の蓄電池の一つであって、太陽光発電や風力発電といった新エネルギーの蓄電に利用されている。図1のRF電池1の動作原理図に示すように、RF電池1は、正極用電解液に含まれる活物質イオンの酸化還元電位と、負極用電解液に含まれる活物質イオンの酸化還元電位との差を利用して充放電を行う電池である。RF電池1は、水素イオンを透過させる隔膜101で正極セル102と負極セル103とに分離されたセル100を備える。
上記セル100は通常、図2、図3に示すような、セルスタック2と呼ばれる構造体の内部に形成される。セルスタック2は、サブスタック200(図3)と呼ばれる積層構造物をその両側から二枚のエンドプレート210,220で挟み込み、締付機構230で締め付けることで構成されている(図3に例示する構成では、複数のサブスタック200を用いている)。
実施形態2では、薄肉領域30の断面形状が実施形態1とは異なるセルフレーム3を備えるセルスタック2の構成を図6に基づいて説明する。薄肉領域30の断面形状以外の構成は、実施形態1と同様の構成とすることができる。
実施形態3では、薄肉領域30の断面形状が実施形態1,2とは異なるセルフレーム3を備えるセルスタック2の構成を図7に基づいて説明する。薄肉領域30の断面形状以外の構成は、実施形態1と同様の構成とすることができる。
実施形態4では、薄肉領域30の断面形状が曲線のみで形成されたセルフレーム3を備えるセルスタック2を図8に基づいて説明する。
実施形態5では、薄肉領域30の断面形状が実施形態1~4とは異なるセルフレーム3を備えるセルスタック2の構成を図9に基づいて説明する。
実施形態1~5では、薄肉領域30の形成幅(薄肉領域30の形成開始位置から外端までの長さ)が同じであった。実施形態6では、各セルフレーム3の薄肉領域30の形成幅が異なる例を図10に基づいて説明する。
セルフレーム3の形状は、図4の形状に限定されるわけではなく、例えば図11に示す形状としても構わない。
セルフレーム3の形状は、図12に示す形状とすることもできる。図12のセルフレーム3では、枠体32に備わるスリット33s,34s,35s,36sが縦方向と横方向に複雑に湾曲して各マニホールド33,34,35,36に繋がっている。
セルフレーム3の形状は、図13に示す形状とすることもできる。図13のセルフレーム3には、マニホールド33,34,35,36から双極板31に繋がるスリットが形成されていない。その代わりに、隣接するセルフレーム3間に配置するガスケット39にスリットを形成している。図13のガスケット39は、セルフレーム3の紙面手前側に重ねるガスケット39である。このガスケット39には、マニホールド33,34,35,36と、マニホールド33に繋がる切欠き状の入口スリット33sと、マニホールド35に繋がる切欠き状の出口スリット35sと、が設けられている。ここで、図示しないが、セルフレーム3の紙面裏側に重ねるガスケット39には、マニホールド33,34,35,36と、マニホールド34に繋がる切欠き状の入口スリット34sと、マニホールド36に繋がる切欠き状の出口スリット36sと、が設けられている。
実施形態1~9では、枠体32の幅方向(紙面左右方向)の長さが、枠体32の長さ方向(紙面上下方向)の長さよりも大きいセルフレーム3を説明した。これに対して、幅方向よりも長さ方向が大きいセルフレームとすることもできる。
その他、長さ方向と幅方向の長さが同じセルフレームとすることもできる。
2 セルスタック(セルスタック)
3 セルフレーム
30 薄肉領域 31 双極板 32 枠体
33,34 給液用マニホールド 35,36 排液用マニホールド
33s,34s 入口スリット 35s,36s 出口スリット
37 シール部材 37s シール溝
39 ガスケット
100 セル 101 隔膜 102 正極セル 103 負極セル
100P 正極用循環機構 100N 負極用循環機構
104 正極電極 105 負極電極 106 正極電解液用タンク
107 負極電解液用タンク 108,109,110,111 導管
112,113 ポンプ
190 給排板 200 サブスタック
210,220 エンドプレート
230 締付機構
Claims (8)
- レドックスフロー電池のセルフレームに用いられる枠体であり、
前記枠体は、外周部を有し、
前記外周部は、前記枠体の中心から前記枠体の外周に向かうに従って徐々に薄肉となる薄肉領域を有する枠体。 - 前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、ペンシルダウン形状を備える請求項1に記載の枠体。
- 前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、矩形の角部がR面取りされた形状である請求項1に記載の枠体。
- 前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は、矩形の角部がC面取りされた形状である請求項1に記載の枠体。
- 前記枠体の中心を通って前記枠体の厚み方向に沿った面を切断面とする断面において、前記薄肉領域の断面形状は曲線のみで構成されている請求項1に記載の枠体。
- 請求項1から請求項5のいずれか1項に記載の枠体と、前記枠体に支持される双極板と、を備えるセルフレーム。
- 請求項6に記載のセルフレームを備えるセルスタック。
- 請求項7に記載のセルスタックを備えるレドックスフロー電池。
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AU2016420290A AU2016420290B2 (en) | 2016-10-05 | 2016-10-05 | Frame body, cell frame, cell stack, and redox flow battery |
PCT/JP2016/079679 WO2018066094A1 (ja) | 2016-10-05 | 2016-10-05 | 枠体、セルフレーム、セルスタック、およびレドックスフロー電池 |
JP2018505483A JP6731167B2 (ja) | 2016-10-05 | 2016-10-05 | 枠体、セルフレーム、セルスタック、およびレドックスフロー電池 |
EP16913642.1A EP3525275B1 (en) | 2016-10-05 | 2016-10-05 | Frame body, cell frame, cell stack, and redox flow battery |
US15/549,109 US10431843B2 (en) | 2016-10-05 | 2016-10-05 | Frame body, cell frame, cell stack, and redox flow battery |
KR1020187006360A KR20190055013A (ko) | 2016-10-05 | 2016-10-05 | 프레임 바디, 셀프레임, 셀스택 및 레독스 플로우 전지 |
TW106125827A TWI731132B (zh) | 2016-10-05 | 2017-08-01 | 框體、電池框架、電池組及氧化還原液流電池 |
DE202017104643.5U DE202017104643U1 (de) | 2016-10-05 | 2017-08-03 | Rahmenkörper, Zellenrahmen, Zellenstapel und Redox-Flow-Batterie |
CN201721263081.XU CN208336385U (zh) | 2016-10-05 | 2017-09-28 | 框架体、电池单元框架、电池单元堆和氧化还原液流电池 |
CN201710895787.6A CN107919486B (zh) | 2016-10-05 | 2017-09-28 | 框架体、电池单元框架、电池单元堆和氧化还原液流电池 |
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US10431843B2 (en) | 2019-10-01 |
CN208336385U (zh) | 2019-01-04 |
KR20190055013A (ko) | 2019-05-22 |
EP3525275A4 (en) | 2019-11-06 |
CN107919486B (zh) | 2021-07-13 |
TWI731132B (zh) | 2021-06-21 |
JP6731167B2 (ja) | 2020-07-29 |
DE202017104643U1 (de) | 2017-08-21 |
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