WO2018066093A1 - Cell stack and redox flow battery - Google Patents

Cell stack and redox flow battery Download PDF

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Publication number
WO2018066093A1
WO2018066093A1 PCT/JP2016/079678 JP2016079678W WO2018066093A1 WO 2018066093 A1 WO2018066093 A1 WO 2018066093A1 JP 2016079678 W JP2016079678 W JP 2016079678W WO 2018066093 A1 WO2018066093 A1 WO 2018066093A1
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WO
WIPO (PCT)
Prior art keywords
frame
cell
cell stack
length
outer end
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PCT/JP2016/079678
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French (fr)
Japanese (ja)
Inventor
山口　英之
毅 寒野
本井　見二
健司 山名
Original Assignee
住友電気工業株式会社
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Priority to PCT/JP2016/079678 priority Critical patent/WO2018066093A1/en
Publication of WO2018066093A1 publication Critical patent/WO2018066093A1/en

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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
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • 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
    • 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 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 cell stack of the present disclosure is A cell stack used for a redox flow battery,
  • the cell stack includes a laminate in which a plurality of cell frames having a frame are laminated,
  • the plurality of cell frames include at least one set of cell frame pairs each having a first cell frame and a second cell frame adjacent to each other,
  • the frame of the first cell frame has a first outer end;
  • the frame of the second cell frame has a second outer end adjacent to the first outer end;
  • the cell stack in which the first outer end portion is shifted by 0.5 mm or more and 20 mm or less with respect to the second outer end portion in a direction intersecting with a stacking direction of the plurality of cell frames.
  • 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 schematic plan view of a cell frame provided in the cell stack according to Embodiment 1.
  • FIG. 3 is a partial enlarged view of the cell stack when the cell stack according to the first embodiment is viewed from a direction orthogonal to the stacking direction of the cell frames.
  • 10 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 3.
  • FIG. 6 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 4.
  • FIG. 10 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 5.
  • FIG. 1 is a schematic configuration diagram of a cell stack according to Embodiment 1.
  • the frame body provided in the cell frame is often manufactured by injection molding in which a resin is injected into a mold.
  • a locally thickened portion is easily formed at a position in the vicinity of the outer end portion of the frame body manufactured by injection molding.
  • the locally thickened portion is not a portion that has been intentionally thickened, but is a portion that becomes thick due to the characteristics of injection molding, and can be easily located in the same position on the frame. Therefore, when multiple cell frames are stacked and tightened, the locally thick parts of each frame overlap, and stress concentrates on the thick parts, damaging the cell frame. There is a fear.
  • an object of the present disclosure is to provide a cell stack in which when a plurality of cell frames are stacked and tightened, the cell frame is hardly damaged.
  • 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 cell stack according to the embodiment is A cell stack used for a redox flow battery,
  • the cell stack includes a laminate in which a plurality of cell frames having a frame are laminated,
  • the plurality of cell frames include at least one set of cell frame pairs each having a first cell frame and a second cell frame adjacent to each other,
  • the frame of the first cell frame has a first outer end;
  • the frame of the second cell frame has a second outer end adjacent to the first outer end;
  • the cell stack in which the first outer end portion is shifted by 0.5 mm or more and 20 mm or less with respect to the second outer end portion in a direction intersecting with a stacking direction of the plurality of cell frames.
  • the amount of deviation between the adjacent first outer end portion and the second outer end portion is 0.5 mm or more, excessive stress concentrates on the locally thickened portions of the frame bodies of both cell frames. Can be sufficiently suppressed.
  • the amount of deviation is too large, the flow of the electrolyte between the manifold provided in the first cell frame (see FIG. 2 of the embodiment) and the manifold provided in the second cell frame is hindered. There is a possibility, but such a problem does not occur if the amount of deviation is 20 mm or less.
  • any of the pair of cell frames adjacent in the stacking direction can satisfy the requirements for the cell frame pair.
  • the frame of the first cell frame may have the same shape as the frame of the second cell frame.
  • the first outer end portion and the second outer end portion that are adjacent to each other are arranged so as to be shifted from each other, so that it is excessive in the thickened portions of the frame bodies provided in both cell frames. Stress is hard to act.
  • the frame of the first cell frame may be different from the frame of the second cell frame when viewed from the stacking direction.
  • the size of the frame provided in the first cell frame when viewed from the stacking direction is different from the size of the frame provided in the second cell frame, the first of the frames provided in the first cell frame. And the second outer end of the frame provided in the second cell frame are shifted from each other.
  • the locally thick portions are different in the frame bodies having different sizes, it is difficult for excessive stress to act on the thick portions of the frame bodies provided in both cell frames.
  • the cell frame may include a bipolar plate disposed on the inner side of the frame.
  • the positive electrode and the negative electrode provided on the cell frame can be separated by the bipolar plate.
  • a frame can be manufactured with high productivity using a mold.
  • the frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body.
  • the direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
  • the first outer end portion of the first cell frame and the second outer end portion of the second cell frame are shifted in both the length direction and the width direction. be able to.
  • the frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body.
  • the direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
  • the length of the said length direction of each said frame body can mention the form larger than the length of the said width direction.
  • the frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body.
  • the direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
  • the length of the said length direction of each said frame body can mention the form smaller than the length of the said width direction.
  • the frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body.
  • the direction perpendicular to the length direction and the stacking direction is the width direction of the frame, The form which the length of the said length direction of each said frame body is the same as the length of the said width direction can be mentioned.
  • a tightening mechanism can mention the form comprised so that it may contact
  • the tightening mechanism Having a pair of end plates disposed on both sides in the stacking direction of the plurality of cell stacks;
  • the tightening mechanism may be configured to be in close contact while applying pressure to the plurality of cell frames via the end plate.
  • 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 in which problems associated with damage to the cell frame, for example, problems such as liquid leakage from the cell frame are unlikely to occur.
  • a redox flow battery (hereinafter referred to as an RF battery) according to an embodiment will be described with reference to FIGS.
  • 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 120, positive electrodes 104, diaphragms 101, negative electrodes 105, and cell frames 120.
  • the structure is sandwiched in (omitted in FIG. 2).
  • the cell frame 120 includes a frame body 122 having a through window and a bipolar plate 121 that closes the through window.
  • the cell plate 120 is disposed so that the positive electrode 104 is in contact with one surface side of the bipolar plate 121.
  • the negative electrode 105 is disposed so as to contact. In this configuration, one cell 100 is formed between the bipolar plates 121 of the adjacent cell frames 120.
  • the electrolyte solution flows through the supply / discharge plates 190, 190 to the cell 100 by the supply manifolds 123, 124 formed in the frame body 122 and the discharge manifolds 125, 126.
  • the vertical direction in FIG. 4 which is the direction in which the liquid supply manifold 123 (124) and the drainage manifold 126 (125) are separated, is the length direction of the frame body 122.
  • the horizontal direction of the paper surface which is the direction in which the liquid supply manifold 124 is separated, is the width direction of the frame body 122, and the depth direction of the paper surface is the thickness direction of the frame body 122.
  • the positive electrode electrolyte is supplied from the liquid supply manifold 123 to the positive electrode 104 via the inlet slit 123 s formed on one surface side (the front side of the paper surface) of the frame body 122, and the outlet slit formed in the upper portion of the frame body 122.
  • the liquid is discharged to the drainage manifold 125 through 125s.
  • the negative electrode electrolyte is supplied from the liquid supply manifold 124 to the negative electrode 105 through an inlet slit 124 s (shown by a broken line) formed on the other surface side (the back side of the paper) of the frame 122.
  • the liquid is discharged to the drainage manifold 126 through an outlet slit 126 s (shown by a broken line) formed in the upper part of 122.
  • An annular sealing member 127 such as an O-ring or a flat packing is disposed between the cell frames 120, and leakage of the electrolyte from the sub stack 200 is suppressed.
  • the frame body 122 of the cell frame 120 is an injection molded body (resin member) manufactured by injection molding.
  • a portion in the vicinity of the outer end portion 5, for example, a portion in the vicinity of the four corner portions tends to be locally thick.
  • the outer end portion 5 is a portion that forms an outer peripheral contour line when the frame body 122 is viewed in plan view, and in this example, shows the entire outer end surface along the thickness direction of the frame body 122. It is a problem in the characteristics of injection molding that the vicinity of the outer end portion 5 is locally thick, and it is not intended to be thick, but locally in the same position in each frame 122. It is easy to create a thickened part.
  • the position of the locally thickened portion is almost the same. If a plurality of such cell frames 120 are stacked, locally thickened portions of the frame body 122 of each cell frame 120 overlap, and when the sub stack 200 is tightened by the tightening mechanism 230, Excessive stress may act on the thickened part. When an excessive stress is applied to the locally thickened portion, there is a risk that the frame body 122 of the cell frame 120 may break, and the electrolyte may leak from the cell stack 2.
  • the first cell frame and the second cell frame constituting at least a part of the cell frame pairs out of the cell frame pairs provided in the cell stack 2 are shifted. It is laminated in a state. In this example, both frames are shifted in the vertical direction with respect to the installation surface on which the cell stack 2 is installed. This point will be described based on the partially enlarged view of FIG.
  • FIG. 5 shows the cell stack 2 as viewed from the direction orthogonal to the stacking direction (left and right direction on the paper) of the cell frames 120A, 120B, and 120C in the vicinity of the outer end 5 of the three cell frames 120A, 120B, and 120C. It is a partial enlarged view.
  • a cell frame pair 3 is composed of a cell frame 120A (first cell frame) and a cell frame 120B (second cell frame), and a cell frame 120B (first cell frame) and a cell frame 120C ( The second cell frame) constitutes a cell frame pair 4.
  • the portion (second outer end portion) 5 is shifted by a length L3.
  • the shift amounts (lengths L3 and L4) in the different cell frame pairs 3 and 4 may be different.
  • the corner portion of the outer end portion 5 of the frame body 122 is chamfered with an R chamfer. By doing so, it is possible to suppress an excessive stress from acting on the adjacent cell frames 120A, 120B, and 120C by the corners of the outer end portion 5 of the frame body 122.
  • the shift amount (length L3, L4) of the outer end 5 is 0.5 mm or more and 20 mm or less. If the shift amount of the outer end 5 is 0.5 mm or more, the locally thickened portion in the frame body 122 of the cell frame 120A (120B) and the locally in the frame body 122 of the cell frame 120B (120C). The thickened portion is shifted in the plane direction of the cell frames 120A and 120B (120B and 120C). As a result, excessive stress is unlikely to act on locally thickened portions of the frame body 122 of each cell frame 120A, 120B, 120C during tightening, and defects such as cracks are less likely to occur in the portions.
  • the displacement amount of the outer end portion 5 is 20 mm or less, the manifolds 123 to 126 of the two cell frames 120 shown in FIG. 3 are not displaced and the manifolds 123 to 126 are not blocked.
  • the deviation amount of the outer end portion 5 is preferably 0.8 mm or more and 10 mm or less, more preferably 1.2 mm or more and 5 mm or less.
  • the first cell frames and the second cell frames of all cell frame pairs provided in the cell stack 2 are stacked in a shifted state as shown in FIG. As a result, it is possible to suppress excessive stress from acting locally in all cell frames provided in the cell stack 2.
  • the maximum shift amount of all the cell frames 120 provided in the cell stack 2 is 20 mm or less. The maximum shift amount is a shift amount between the cell frame 120 at the lowest position and the cell frame 120 at the highest position among all the cell frames 120.
  • the state in which the two adjacent cell frames 120 are displaced in the vertical direction (length direction along the vertical direction) with respect to the installation surface on which the cell stack 2 is installed has been described. It may be in a state shifted in the direction). Two adjacent cell frames 120 may be shifted in both the vertical direction and the horizontal direction with reference to the installation surface. In this case, the amount of deviation in the vertical direction and the amount of deviation in the horizontal direction are 0.5 mm or more and 20 mm or less, respectively.
  • the size of the frame provided in the first cell frame may be different. If cell frames having different sizes of frames are stacked, the outer edge of the frame provided in the first cell frame and the outside of the frame provided in the second cell frame are viewed from the direction orthogonal to the stacking direction. The edge part is shifted, and the locally thickened part in the frame of the first cell frame and the locally thickened part in the frame of the second cell frame are shifted in the plane direction of the cell frame. .
  • the shape of the cell frame 120 is not limited to the shape shown in FIG. 4, and may be the shape shown in FIG. 6, for example.
  • slits 123s, 124s, 125s, and 126s provided in the frame body 122 are substantially J-shaped. Specifically, after extending outward from the lateral side position of the bipolar plate 121, the bipolar plate 121 is connected to the manifolds 123, 124, 125, 126 after being bent inward.
  • the shape of the cell frame 120 may be the shape shown in FIG. In the cell frame 120 of FIG. 7, slits 123 s, 124 s, 125 s, 126 s provided in the frame body 122 are complicatedly curved in the vertical direction and the horizontal direction and connected to the manifolds 123, 124, 125, 126.
  • the shape of the cell frame 120 may be the shape shown in FIG. In the cell frame 120 of FIG. 8, slits that connect the manifolds 123, 124, 125, and 126 to the bipolar plate 121 are not formed. Instead, a slit is formed in the gasket 129 disposed between the adjacent cell frames 120.
  • the gasket 129 in FIG. 5 is a gasket 129 that is stacked on the front side of the cell frame 120 in the drawing.
  • the gasket 129 is provided with manifolds 123, 124, 125, and 126, a notched inlet slit 123 s connected to the manifold 123, and a notched outlet slit 125 s connected to the manifold 125.
  • the gasket 129 overlapped on the back side of the paper surface of the cell frame 120 has manifolds 123, 124, 125, 126, a notch-shaped inlet slit 124 s connected to the manifold 124, and a notch shape connected to the manifold 126.
  • Outlet slit 126s is provided with manifolds 123, 124, 125, and 126, a notched inlet slit 123 s connected to the manifold 123, and a notched outlet slit 125 s connected to the manifold 125.
  • the cell frame 120 has been described in which the length of the frame body 122 in the width direction (left and right direction in the drawing) is larger than the length of the frame body 122 in the length direction (up and down direction in the drawing).
  • a cell frame having a length in the length direction larger than the length in the width direction may be used.
  • a cell frame having the same length in the length direction and the width direction may be used.
  • test body A A cell stack (test body A) was prepared in which the shift amount of the outer end portion of all cell frame pairs provided in the cell stack was around 0.5 mm to 3.0 mm.
  • a cell stack (test body B) in which the shift amount of the outer end portion of all cell frame pairs provided in the cell stack is about 0.3 mm was prepared.
  • the tightening force of the cell stack tightening mechanism 230 was gradually increased. As a result, the cell frame of the test body B was cracked when the predetermined tightening force was reached, but the cell frame of the test example A tightened with the same tightening force was cracked. Did not occur.

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Abstract

This cell stack is used in a redox flow battery. The cell stack comprises a layered body wherein a plurality of cell frames, each having a frame body, have been layered. The plurality of the cell frames include at least one set of a cell frame pair which has a first cell frame and a second cell frame that are adjacent to one another. In at least a portion thereof, the frame body of the first cell frame has a first outer edge section. In at least a portion thereof, the frame body of the second cell frame has a second outer edge section that is adjacent to the first outer edge section. In a direction intersecting with the layering direction of the plurality of cell frames, the first outer edge section is offset relative to the second outer edge section by 0.5 mm to 20 mm inclusive.

Description

セルスタック、およびレドックスフロー電池Cell stack and redox flow battery
　本発明は、セルスタック、およびレドックスフロー電池に関するものである。 The present invention relates to a cell stack and a redox flow battery.
　特許文献１には、双極板を有するセルフレーム、正極電極、隔膜、負極電極、およびセルフレームを複数積層し、その積層体を給排板で挟み込んだセルスタック、およびそのセルスタックを用いたレドックスフロー電池が記載されている。セルフレームは、双極板と、この双極板の外周に配置される枠体とを備える。この構成では、隣接する各セルフレームの双極板の間に一つのセルが形成される。 In Patent Document 1, 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.
特開２０１５－７９７３８号公報Japanese Patent Laying-Open No. 2015-79738
　本開示のセルスタックは、
　レドックスフロー電池に用いられるセルスタックであって、
　前記セルスタックは、枠体を有する複数のセルフレームを積層した積層体を備え、
　複数の前記セルフレームは、隣接する第１のセルフレームと第２のセルフレームとを有するセルフレーム対を少なくとも一組含み、
　前記第１のセルフレームの前記枠体は、第１の外端部を有し、
　前記第２のセルフレームの前記枠体は、前記第１の外端部に隣接する第２の外端部を有し、
　前記第１の外端部は、前記複数のセルフレームの積層方向と交差する方向において、前記第２の外端部に対して０．５ｍｍ以上２０ｍｍ以下ずれているセルスタック。 The cell stack of the present disclosure is
A cell stack used for a redox flow battery,
The cell stack includes a laminate in which a plurality of cell frames having a frame are laminated,
The plurality of cell frames include at least one set of cell frame pairs each having a first cell frame and a second cell frame adjacent to each other,
The frame of the first cell frame has a first outer end;
The frame of the second cell frame has a second outer end adjacent to the first outer end;
The cell stack in which the first outer end portion is shifted by 0.5 mm or more and 20 mm or less with respect to the second outer end portion in a direction intersecting with a stacking direction of the plurality of cell frames.
　本開示のレドックスフロー電池は、
　本開示のセルスタックを備える。 The redox flow battery of the present disclosure is
The cell stack of the present disclosure is provided.
実施形態１に係るレドックスフロー電池の動作原理図である。3 is an operation principle diagram of the redox flow battery according to Embodiment 1. FIG. 実施形態１に係るレドックスフロー電池の概略構成図である。1 is a schematic configuration diagram of a redox flow battery according to Embodiment 1. FIG. 実施形態１に係るセルスタックの概略構成図である。1 is a schematic configuration diagram of a cell stack according to Embodiment 1. FIG. 実施形態１に係るセルスタックに備わるセルフレームの概略平面図である。3 is a schematic plan view of a cell frame provided in the cell stack according to Embodiment 1. FIG. 実施形態１に係るセルスタックをセルフレームの積層方向と直交する方向から見たセルスタックの部分拡大図である。FIG. 3 is a partial enlarged view of the cell stack when the cell stack according to the first embodiment is viewed from a direction orthogonal to the stacking direction of the cell frames. 実施形態３に係るセルスタックに備わるセルフレームの概略平面図である。10 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 3. FIG. 実施形態４に係るセルスタックに備わるセルフレームの概略平面図である。6 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 4. FIG. 実施形態５に係るセルスタックに備わるセルフレームの概略平面図である。10 is a schematic plan view of a cell frame provided in a cell stack according to Embodiment 5. FIG.
［本開示が解決しようとする課題］
　セルフレームに備わる枠体は、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。しかし、射出成形で製造される枠体の外端部の近傍の位置には、局所的に厚くなった部分ができ易い。その局所的に厚くなった部分は、意図して厚くした部分ではなく、射出成形の特性上、厚くなってしまう部分であり、枠体における同じような位置にでき易い。そのため、複数のセルフレームを積層して締め付けたときに、各枠体の局所的に厚くなった部分が重なってしまい、その厚くなった部分に応力が集中して、セルフレームの枠体が損傷する恐れがある。特に、隣接する一対のセルフレームに備わる枠体が同一の金型で作製された同一形状の枠体である場合、両セルフレームの枠体における局所的に厚くなった部分の位置がほぼ同じとなるため、上述したセルフレームの損傷の問題が生じ易い。 [Problems to be solved by the present disclosure]
The frame body provided in the cell frame is often manufactured by injection molding in which a resin is injected into a mold. However, a locally thickened portion is easily formed at a position in the vicinity of the outer end portion of the frame body manufactured by injection molding. The locally thickened portion is not a portion that has been intentionally thickened, but is a portion that becomes thick due to the characteristics of injection molding, and can be easily located in the same position on the frame. Therefore, when multiple cell frames are stacked and tightened, the locally thick parts of each frame overlap, and stress concentrates on the thick parts, damaging the cell frame. There is a fear. In particular, when the frames provided in a pair of adjacent cell frames are the same shape frame made of the same mold, the positions of the locally thickened portions in the frame bodies of both cell frames are substantially the same. Therefore, the above-described problem of cell frame damage is likely to occur.
　そこで、本開示では、複数のセルフレームを積層して締め付けたときに、セルフレームに損傷が生じ難いセルスタックを提供することを目的の一つとする。また、本開示では、セルフレームに損傷が生じ難いセルスタックを備えるレドックスフロー電池を提供することを目的の一つとする。 Therefore, an object of the present disclosure is to provide a cell stack in which when a plurality of cell frames are stacked and tightened, the cell frame is hardly damaged. In addition, 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.
［本開示の効果］
　本開示のセルスタックでは、セルフレームの枠体に損傷が生じ難い。また、本開示のレドックスフロー電池では、セルフレームの枠体に損傷が生じ難い。 [Effects of the present disclosure]
In the cell stack of the present disclosure, it is difficult for the frame of the cell frame to be damaged. Further, in the redox flow battery of the present disclosure, it is difficult for the frame body of the cell frame to be damaged.
［本願発明の実施形態の説明］
　最初に本願発明の実施形態の内容を列記して説明する。 [Description of Embodiment of Present Invention]
First, the contents of the embodiments of the present invention will be listed and described.
＜１＞実施形態に係るセルスタックは、
　レドックスフロー電池に用いられるセルスタックであって、
　前記セルスタックは、枠体を有する複数のセルフレームを積層した積層体を備え、
　複数の前記セルフレームは、隣接する第１のセルフレームと第２のセルフレームとを有するセルフレーム対を少なくとも一組含み、
　前記第１のセルフレームの前記枠体は、第１の外端部を有し、
　前記第２のセルフレームの前記枠体は、前記第１の外端部に隣接する第２の外端部を有し、
　前記第１の外端部は、前記複数のセルフレームの積層方向と交差する方向において、前記第２の外端部に対して０．５ｍｍ以上２０ｍｍ以下ずれているセルスタック。 <1> The cell stack according to the embodiment is
A cell stack used for a redox flow battery,
The cell stack includes a laminate in which a plurality of cell frames having a frame are laminated,
The plurality of cell frames include at least one set of cell frame pairs each having a first cell frame and a second cell frame adjacent to each other,
The frame of the first cell frame has a first outer end;
The frame of the second cell frame has a second outer end adjacent to the first outer end;
The cell stack in which the first outer end portion is shifted by 0.5 mm or more and 20 mm or less with respect to the second outer end portion in a direction intersecting with a stacking direction of the plurality of cell frames.
　既に述べたように、射出成形体の枠体では、同じような位置に意図せず厚くなった部分ができ易い。これに対して、上記構成に示すように、隣接する第１のセルフレームに備わる枠体の第１の外端部と、第２のセルフレームに備わる枠体の第２の外端部とをずらすことで、第１のセルフレームの枠体における局所的に厚くなった部分と、第２のセルフレームの枠体における局所的に厚くなった部分とが、セルフレームの平面方向にずれる。その結果、セルフレーム対が締め付けられたときに、第１のセルフレームの枠体と第２のセルフレームの枠体における局所的に厚くなった部分に過剰に応力が集中することがなく、両セルフレームの枠体が損傷し難い。 As already described, in the frame of the injection-molded body, an unintentionally thick portion is easily formed at the same position. On the other hand, as shown in the above configuration, the first outer end of the frame provided in the adjacent first cell frame and the second outer end of the frame provided in the second cell frame. By shifting, the locally thickened part in the frame of the first cell frame and the locally thickened part in the frame of the second cell frame are shifted in the plane direction of the cell frame. As a result, when the cell frame pair is tightened, stress is not excessively concentrated on the locally thickened portions of the frame of the first cell frame and the frame of the second cell frame. The cell frame is difficult to damage.
　隣接する第１の外端部と第２の外端部とのずれ量が０．５ｍｍ以上であれば、両セルフレームの枠体における局所的に厚くなった部分に過剰な応力が集中することを十分に抑制できる。一方、上記ずれ量が大きくなり過ぎると、第１のセルフレームに設けられるマニホールド（実施形態の図２参照）と第２のセルフレームに設けられるマニホールドとの間の電解液の流通が阻害される恐れがあるが、当該ずれ量が２０ｍｍ以下であればそのような問題は生じない。 If the amount of deviation between the adjacent first outer end portion and the second outer end portion is 0.5 mm or more, excessive stress concentrates on the locally thickened portions of the frame bodies of both cell frames. Can be sufficiently suppressed. On the other hand, if the amount of deviation is too large, the flow of the electrolyte between the manifold provided in the first cell frame (see FIG. 2 of the embodiment) and the manifold provided in the second cell frame is hindered. There is a possibility, but such a problem does not occur if the amount of deviation is 20 mm or less.
＜２＞実施形態に係るセルスタックの一形態として、
　前記積層方向に隣接する一対の前記セルフレームのいずれもが、前記セルフレーム対の要件を満たす形態を挙げることができる。 <2> As one form of the cell stack according to the embodiment,
Any of the pair of cell frames adjacent in the stacking direction can satisfy the requirements for the cell frame pair.
　上記構成によれば、セルスタックに備わる全てのセルフレームに備わる枠体の損傷を効果的に抑制することができる。 According to the above configuration, it is possible to effectively suppress damage to the frames provided in all the cell frames provided in the cell stack.
＜３＞実施形態に係るセルスタックの一形態として、
　前記第１のセルフレームの枠体は、前記第２のセルフレームの枠体と同一形状である形態を挙げることができる。 <3> As one form of the cell stack according to the embodiment,
The frame of the first cell frame may have the same shape as the frame of the second cell frame.
　同一の金型で作製された同一形状の枠体では、枠体におけるほぼ同じ位置に局所的に厚くなった部分ができ易い。しかし、実施形態に係るセルスタックでは、隣接する第１の外端部と第２の外端部とがずれて配置されているため、両セルフレームに備わる枠体の厚くなった部分に過大な応力が作用し難い。 In the same shape frame made with the same mold, locally thick portions are likely to be formed at substantially the same position in the frame. However, in the cell stack according to the embodiment, the first outer end portion and the second outer end portion that are adjacent to each other are arranged so as to be shifted from each other, so that it is excessive in the thickened portions of the frame bodies provided in both cell frames. Stress is hard to act.
＜４＞実施形態に係るセルスタックの一形態として、
　前記第１のセルフレームの枠体は、前記第２のセルフレームの枠体と、前記積層方向から見たときの大きさが異なる形態を挙げることができる。 <4> As one form of the cell stack according to the embodiment,
The frame of the first cell frame may be different from the frame of the second cell frame when viewed from the stacking direction.
　積層方向から見たときの第１のセルフレームに備わる枠体の大きさと、第２のセルフレームに備わる枠体の大きさが異なっていれば、第１のセルフレームに備わる枠体の第１の外端部と、第２のセルフレームに備わる枠体の第２の外端部とがずれる。また、大きさの異なる枠体では、局所的に厚くなった部分が異なるため、両セルフレームに備わる枠体の厚くなった部分に過大な応力が作用し難い。 If the size of the frame provided in the first cell frame when viewed from the stacking direction is different from the size of the frame provided in the second cell frame, the first of the frames provided in the first cell frame. And the second outer end of the frame provided in the second cell frame are shifted from each other. In addition, since the locally thick portions are different in the frame bodies having different sizes, it is difficult for excessive stress to act on the thick portions of the frame bodies provided in both cell frames.
＜５＞実施形態に係るセルスタックの一形態として
　前記セルフレームは、前記枠体の内側に配される双極板を備える形態を挙げることができる。 <5> As an embodiment of the cell stack according to the embodiment, the cell frame may include a bipolar plate disposed on the inner side of the frame.
　双極板によってセルフレームに設けられる正極電極と負極電極とを離隔することができる。 The positive electrode and the negative electrode provided on the cell frame can be separated by the bipolar plate.
＜６＞実施形態に係るセルスタックの一形態として、
　前記枠体が樹脂で構成されている形態を挙げることができる。 <6> As one form of the cell stack according to the embodiment,
A form in which the frame is made of resin can be exemplified.
　樹脂であれば、金型を用いて枠体を生産性良く製造することができる。 If it is resin, a frame can be manufactured with high productivity using a mold.
＜７＞実施形態に係るセルスタックの一形態として、
　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
　前記長さ方向と前記幅方向の両方で、前記第１のセルフレームの前記第１の外端部と、前記第２のセルフレームの前記第２の外端部とがずれている形態を挙げることができる。 <7> As one form of the cell stack according to the embodiment,
The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
The first outer end portion of the first cell frame and the second outer end portion of the second cell frame are shifted in both the length direction and the width direction. be able to.
　上記構成であれば、枠体の全域にわたって枠体の損傷を効果的に抑制できる。 If it is the said structure, damage to a frame can be effectively suppressed over the whole frame.
＜８＞実施形態に係るセルスタックの一形態として、
　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
　各前記枠体の前記長さ方向の長さが前記幅方向の長さよりも大きい形態を挙げることができる。 <8> As one form of the cell stack according to the embodiment,
The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
The length of the said length direction of each said frame body can mention the form larger than the length of the said width direction.
　上記構成によれば、セルスタックの設置スペースに制約がある場合でも、セルスタックを設置し易い。 According to the above configuration, it is easy to install the cell stack even when the installation space of the cell stack is limited.
＜９＞実施形態に係るセルスタックの一形態として、
　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
　各前記枠体の前記長さ方向の長さが前記幅方向の長さよりも小さい形態を挙げることができる。 <9> As one form of the cell stack according to the embodiment,
The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
The length of the said length direction of each said frame body can mention the form smaller than the length of the said width direction.
　上記構成によれば、セルスタックの設置スペースに制約がある場合でも、セルスタックを設置し易い。 According to the above configuration, it is easy to install the cell stack even when the installation space of the cell stack is limited.
＜１０＞実施形態に係るセルスタックの一形態として、
　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
　各前記枠体の前記長さ方向の長さが前記幅方向の長さと同じである形態を挙げることができる。 <10> As one form of the cell stack according to the embodiment,
The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
The form which the length of the said length direction of each said frame body is the same as the length of the said width direction can be mentioned.
　上記構成によれば、セルスタックの設置スペースが立方体状で、その幅と高さに制限がある場合でも、セルスタックを設置し易い。 According to the above configuration, it is easy to install the cell stack even when the installation space of the cell stack is cubic and the width and height are limited.
＜１１＞実施形態に係るセルスタックの一形態として、
　さらに締付機構を備え、
　前記締付機構は、複数の前記セルフレームに圧力を与えながら密着させるように構成されている形態を挙げることができる。 <11> As one form of the cell stack according to the embodiment,
In addition, a tightening mechanism
The said clamping mechanism can mention the form comprised so that it may contact | adhere, applying a pressure to the said several cell frame.
　締付機構によってセルスタックを締め付けることで、セルスタックからの電解液の漏れを抑制できる。 By tightening the cell stack with the tightening mechanism, leakage of the electrolyte from the cell stack can be suppressed.
＜１２＞前記締付機構を備える実施形態に係るセルスタックの一形態として、
　複数の前記セルスタックの積層方向の両側に配置される一対のエンドプレートを有し、
　前記締付機構は、前記エンドプレートを介して複数の前記セルフレームに圧力を与えながら密着させるように構成されている形態を挙げることができる。 <12> As one form of the cell stack according to the embodiment including the tightening mechanism,
Having a pair of end plates disposed on both sides in the stacking direction of the plurality of cell stacks;
The tightening mechanism may be configured to be in close contact while applying pressure to the plurality of cell frames via the end plate.
　エンドプレートを介してセルスタックを締め付けることで、締め付け力がセルフレームに直接作用することを抑制でき、セルフレームの損傷を抑制できる。 ¡By tightening the cell stack via the end plate, it is possible to suppress the tightening force from directly acting on the cell frame and to suppress damage to the cell frame.
＜１３＞実施形態に係るレドックスフロー電池は、
　実施形態に係るセルスタックを備える。 <13> The redox flow battery according to the embodiment is
The cell stack according to the embodiment is provided.
　実施形態のレドックスフロー電池は、セルフレームに損傷が生じ難いセルスタックを備えるレドックスフロー電池である。そのため、実施形態のレドックスフロー電池は、セルフレームの損傷に伴う不具合、例えばセルフレームから液漏れなどの不具合が生じ難いレドックスフロー電池である。 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 in which problems associated with damage to the cell frame, for example, problems such as liquid leakage from the cell frame are unlikely to occur.
［本発明の実施形態の詳細］
　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。 [Details of the embodiment of the present invention]
Hereinafter, an embodiment of a redox flow battery (RF battery) according to the embodiment will be described. In addition, this invention is not necessarily limited to the structure shown by embodiment, It is shown by the claim and intends that all the changes within the meaning and range equivalent to the claim are included.
＜実施形態１＞
　実施形態に係るレドックスフロー電池（以下、ＲＦ電池）を図１～図４に基づいて説明する。 <Embodiment 1>
A redox flow battery (hereinafter referred to as an RF battery) according to an embodiment will be described with reference to FIGS.
　≪ＲＦ電池≫
　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。 ≪RF battery≫
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. As shown in the operational principle diagram of the RF battery 1 in FIG. 1, 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.
　正極セル１０２には正極電極１０４が内蔵され、かつ正極用電解液を貯留する正極電解液用タンク１０６が導管１０８，１１０を介して接続されている。導管１０８にはポンプ１１２が設けられており、これら部材１０６，１０８，１１０，１１２によって正極用電解液を循環させる正極用循環機構１００Ｐが構成されている。同様に、負極セル１０３には負極電極１０５が内蔵され、かつ負極用電解液を貯留する負極電解液用タンク１０７が導管１０９，１１１を介して接続されている。導管１０９にはポンプ１１３が設けられており、これらの部材１０７，１０９，１１１，１１３によって負極用電解液を循環させる負極用循環機構１００Ｎが構成されている。各タンク１０６，１０７に貯留される電解液は、充放電の際にポンプ１１２，１１３によりセル１０２，１０３内に循環される。充放電を行なわない場合、ポンプ１１２，１１３は停止され、電解液は循環されない。 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. Similarly, 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.
　≪セルスタック≫
　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）。 ≪Cell stack≫
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).
　サブスタック２００（図３）は、セルフレーム１２０、正極電極１０４、隔膜１０１、負極電極１０５、およびセルフレーム１２０を複数積層し、その積層体を給排板１９０，１９０（図３の下図参照、図２では省略）で挟み込んだ構成を備える。セルフレーム１２０は、貫通窓を有する枠体１２２と貫通窓を塞ぐ双極板１２１とを有しており、双極板１２１の一面側には正極電極１０４が接触するように配置され、双極板１２１の他面側には負極電極１０５が接触するように配置される。この構成では、隣接する各セルフレーム１２０の双極板１２１の間に一つのセル１００が形成されることになる。 The sub-stack 200 (FIG. 3) includes a stack of a plurality of cell frames 120, positive electrodes 104, diaphragms 101, negative electrodes 105, and cell frames 120. The structure is sandwiched in (omitted in FIG. 2). The cell frame 120 includes a frame body 122 having a through window and a bipolar plate 121 that closes the through window. The cell plate 120 is disposed so that the positive electrode 104 is in contact with one surface side of the bipolar plate 121. On the other surface side, the negative electrode 105 is disposed so as to contact. In this configuration, one cell 100 is formed between the bipolar plates 121 of the adjacent cell frames 120.
　給排板１９０，１９０を介したセル１００への電解液の流通は、図４に示すように、枠体１２２に形成される給液用マニホールド１２３，１２４と、排液用マニホールド１２５，１２６により行われる。本例では、給液用マニホールド１２３（１２４）と排液用マニホールド１２６（１２５）とが離隔する方向である図４の紙面上下方向が枠体１２２の長さ方向であり、給液用マニホールド１２３と給液用マニホールド１２４とが離隔する方向である紙面左右方向が枠体１２２の幅方向、紙面奥行き方向が枠体１２２の厚さ方向である。正極用電解液は、給液用マニホールド１２３から枠体１２２の一面側（紙面表側）に形成される入口スリット１２３ｓを介して正極電極１０４に供給され、枠体１２２の上部に形成される出口スリット１２５ｓを介して排液用マニホールド１２５に排出される。同様に、負極用電解液は、給液用マニホールド１２４から枠体１２２の他面側（紙面裏側）に形成される入口スリット１２４ｓ（破線で示す）を介して負極電極１０５に供給され、枠体１２２の上部に形成される出口スリット１２６ｓ（破線で示す）を介して排液用マニホールド１２６に排出される。各セルフレーム１２０間には、Ｏリングや平パッキンなどの環状のシール部材１２７が配置され、サブスタック２００からの電解液の漏れが抑制されている。 As shown in FIG. 4, the electrolyte solution flows through the supply / discharge plates 190, 190 to the cell 100 by the supply manifolds 123, 124 formed in the frame body 122 and the discharge manifolds 125, 126. Done. In this example, the vertical direction in FIG. 4, which is the direction in which the liquid supply manifold 123 (124) and the drainage manifold 126 (125) are separated, is the length direction of the frame body 122. The horizontal direction of the paper surface, which is the direction in which the liquid supply manifold 124 is separated, is the width direction of the frame body 122, and the depth direction of the paper surface is the thickness direction of the frame body 122. The positive electrode electrolyte is supplied from the liquid supply manifold 123 to the positive electrode 104 via the inlet slit 123 s formed on one surface side (the front side of the paper surface) of the frame body 122, and the outlet slit formed in the upper portion of the frame body 122. The liquid is discharged to the drainage manifold 125 through 125s. Similarly, the negative electrode electrolyte is supplied from the liquid supply manifold 124 to the negative electrode 105 through an inlet slit 124 s (shown by a broken line) formed on the other surface side (the back side of the paper) of the frame 122. The liquid is discharged to the drainage manifold 126 through an outlet slit 126 s (shown by a broken line) formed in the upper part of 122. An annular sealing member 127 such as an O-ring or a flat packing is disposed between the cell frames 120, and leakage of the electrolyte from the sub stack 200 is suppressed.
　上記セルフレーム１２０の枠体１２２は、射出成形によって製造された射出成形体（樹脂性部材）である。射出成形体である枠体１２２は、その外端部５の近傍の部分、例えば四つの角部の近傍の部分が局所的に厚くなり易い。外端部５は、枠体１２２を平面視したときに外周輪郭線を構成する部分であって、本例では枠体１２２の厚み方向に沿った外端面全体を示す。外端部５の近傍が局所的に厚くなるのは、射出成形の特性上の問題であって、意図して厚くしているわけではないが、各枠体１２２における同じような位置に、局所的に厚くなった部分ができ易い。特に、同一の金型で作製された枠体１２２では、局所的に厚くなった部分の位置がほぼ同じとなる。このようなセルフレーム１２０を複数積層すれば、各セルフレーム１２０の枠体１２２の局所的に厚くなった部分が重なってしまい、締付機構２３０でサブスタック２００を締め付けたときに、局所的に厚くなった部分に過大な応力が作用する恐れがある。局所的に厚くなった部分に過大な応力が作用した場合、セルフレーム１２０の枠体１２２が割れるなどの不具合が生じる恐れがあり、そうなるとセルスタック２から電解液が漏れる恐れがある。 The frame body 122 of the cell frame 120 is an injection molded body (resin member) manufactured by injection molding. In the frame body 122 that is an injection-molded body, a portion in the vicinity of the outer end portion 5, for example, a portion in the vicinity of the four corner portions tends to be locally thick. The outer end portion 5 is a portion that forms an outer peripheral contour line when the frame body 122 is viewed in plan view, and in this example, shows the entire outer end surface along the thickness direction of the frame body 122. It is a problem in the characteristics of injection molding that the vicinity of the outer end portion 5 is locally thick, and it is not intended to be thick, but locally in the same position in each frame 122. It is easy to create a thickened part. Particularly, in the frame body 122 made of the same mold, the position of the locally thickened portion is almost the same. If a plurality of such cell frames 120 are stacked, locally thickened portions of the frame body 122 of each cell frame 120 overlap, and when the sub stack 200 is tightened by the tightening mechanism 230, Excessive stress may act on the thickened part. When an excessive stress is applied to the locally thickened portion, there is a risk that the frame body 122 of the cell frame 120 may break, and the electrolyte may leak from the cell stack 2.
　上記問題点に鑑み、本例のＲＦ電池１では、セルスタック２に備わるセルフレーム対のうち、少なくとも一部のセルフレーム対を構成する第１のセルフレームと第２のセルフレームとがずれた状態で積層されている。本例では、セルスタック２を設置する設置面を基準にして上下方向に両フレームをずれた状態にしている。この点を図５の部分拡大図に基づいて説明する。 In view of the above problems, in the RF battery 1 of the present example, the first cell frame and the second cell frame constituting at least a part of the cell frame pairs out of the cell frame pairs provided in the cell stack 2 are shifted. It is laminated in a state. In this example, both frames are shifted in the vertical direction with respect to the installation surface on which the cell stack 2 is installed. This point will be described based on the partially enlarged view of FIG.
　図５は、３枚のセルフレーム１２０Ａ，１２０Ｂ，１２０Ｃの外端部５近傍の部分を、セルフレーム１２０Ａ，１２０Ｂ，１２０Ｃの積層方向（紙面左右方向）に直交する方向から見たセルスタック２の部分拡大図である。 FIG. 5 shows the cell stack 2 as viewed from the direction orthogonal to the stacking direction (left and right direction on the paper) of the cell frames 120A, 120B, and 120C in the vicinity of the outer end 5 of the three cell frames 120A, 120B, and 120C. It is a partial enlarged view.
　図５では、セルフレーム１２０Ａ（第１のセルフレーム）とセルフレーム１２０Ｂ（第２のセルフレーム）とでセルフレーム対３が構成され、セルフレーム１２０Ｂ（第１のセルフレーム）とセルフレーム１２０Ｃ（第２のセルフレーム）とでセルフレーム対４が構成されている。図５に示すように、セルフレーム対３における第１のセルフレーム１２０Ａの枠体１２２における外端部（第１の外端部）５と、第２のセルフレーム１２０Ｂの枠体１２２における外端部（第２の外端部）５とが、長さＬ３だけずれている。また、セルフレーム対４における第１のセルフレーム１２０Ｂの枠体１２２の外端部（第１の外端部）５と、第２のセルフレーム１２０Ｃの外端部（第２の外端部）５とが、長さＬ４だけずれている。このように、異なるセルフレーム対３，４におけるずれ量（長さＬ３，Ｌ４）は異なっていても良い。ここで、枠体１２２の外端部５の角部はＲ面取りやＣ面取りしておくことが好ましい。そうすることで、枠体１２２の外端部５の角部によって、隣接するセルフレーム１２０Ａ，１２０Ｂ，１２０Ｃに過度な応力が作用することを抑制できる。 In FIG. 5, a cell frame pair 3 is composed of a cell frame 120A (first cell frame) and a cell frame 120B (second cell frame), and a cell frame 120B (first cell frame) and a cell frame 120C ( The second cell frame) constitutes a cell frame pair 4. As shown in FIG. 5, the outer end (first outer end) 5 of the frame 122 of the first cell frame 120A in the cell frame pair 3 and the outer end of the frame 122 of the second cell frame 120B. The portion (second outer end portion) 5 is shifted by a length L3. Further, the outer end portion (first outer end portion) 5 of the frame body 122 of the first cell frame 120B in the cell frame pair 4 and the outer end portion (second outer end portion) of the second cell frame 120C. 5 is shifted by a length L4. As described above, the shift amounts (lengths L3 and L4) in the different cell frame pairs 3 and 4 may be different. Here, it is preferable that the corner portion of the outer end portion 5 of the frame body 122 is chamfered with an R chamfer. By doing so, it is possible to suppress an excessive stress from acting on the adjacent cell frames 120A, 120B, and 120C by the corners of the outer end portion 5 of the frame body 122.
　外端部５のずれ量（長さＬ３，Ｌ４）は、０．５ｍｍ以上２０ｍｍ以下とする。外端部５のずれ量が０．５ｍｍ以上であれば、セルフレーム１２０Ａ（１２０Ｂ）の枠体１２２における局所的に厚くなった部分と、セルフレーム１２０Ｂ（１２０Ｃ）の枠体１２２における局所的に厚くなった部分とが、セルフレーム１２０Ａ，１２０Ｂ（１２０Ｂ，１２０Ｃ）の平面方向にずれる。その結果、締め付け時に各セルフレーム１２０Ａ，１２０Ｂ，１２０Ｃの枠体１２２における局所的に厚くなった部分に過大な応力が作用し難くなり、当該部分に割れなどの不具合が生じ難くなる。一方、外端部５のずれ量が２０ｍｍ以下であれば、図３に示す二枚のセルフレーム１２０のマニホールド１２３～１２６がずれて、マニホールド１２３～１２６が閉塞することがない。上記外端部５のずれ量は、０．８ｍｍ以上１０ｍｍ以下、さらには１．２ｍｍ以上５ｍｍ以下とすることが好ましい。 The shift amount (length L3, L4) of the outer end 5 is 0.5 mm or more and 20 mm or less. If the shift amount of the outer end 5 is 0.5 mm or more, the locally thickened portion in the frame body 122 of the cell frame 120A (120B) and the locally in the frame body 122 of the cell frame 120B (120C). The thickened portion is shifted in the plane direction of the cell frames 120A and 120B (120B and 120C). As a result, excessive stress is unlikely to act on locally thickened portions of the frame body 122 of each cell frame 120A, 120B, 120C during tightening, and defects such as cracks are less likely to occur in the portions. On the other hand, if the displacement amount of the outer end portion 5 is 20 mm or less, the manifolds 123 to 126 of the two cell frames 120 shown in FIG. 3 are not displaced and the manifolds 123 to 126 are not blocked. The deviation amount of the outer end portion 5 is preferably 0.8 mm or more and 10 mm or less, more preferably 1.2 mm or more and 5 mm or less.
　ここで、セルスタック２に備わる全てのセルフレーム対の第１のセルフレームと第２のセルフレームとが、図５に示すようにずれた状態で積層されていることが好ましい。その結果、セルスタック２に備わる全てのセルフレームにおいて、局所的に過剰な応力が作用することを抑制できる。この場合、セルスタック２に備わる全てのセルフレーム１２０の最大ずれ量を２０ｍｍ以下となるようにすることが好ましい。最大ずれ量とは、全てのセルフレーム１２０のうち、最も低い位置にあるセルフレーム１２０と最も高い位置にあるセルフレーム１２０とのずれ量のことである。 Here, it is preferable that the first cell frames and the second cell frames of all cell frame pairs provided in the cell stack 2 are stacked in a shifted state as shown in FIG. As a result, it is possible to suppress excessive stress from acting locally in all cell frames provided in the cell stack 2. In this case, it is preferable that the maximum shift amount of all the cell frames 120 provided in the cell stack 2 is 20 mm or less. The maximum shift amount is a shift amount between the cell frame 120 at the lowest position and the cell frame 120 at the highest position among all the cell frames 120.
　本例では、隣接する二つのセルフレーム１２０が、セルスタック２を設置する設置面を基準にして上下方向（鉛直方向に沿った長さ方向）にずれた状態を説明したが、左右方向（幅方向）にずれた状態としても良い。また、隣接する二つのセルフレーム１２０が、設置面を基準にして上下方向と左右方向の両方にずれた状態としても構わない。この場合、上下方向のずれ量と左右方向のずれ量はそれぞれ、０．５ｍｍ以上２０ｍｍ以下とする。 In this example, the state in which the two adjacent cell frames 120 are displaced in the vertical direction (length direction along the vertical direction) with respect to the installation surface on which the cell stack 2 is installed has been described. It may be in a state shifted in the direction). Two adjacent cell frames 120 may be shifted in both the vertical direction and the horizontal direction with reference to the installation surface. In this case, the amount of deviation in the vertical direction and the amount of deviation in the horizontal direction are 0.5 mm or more and 20 mm or less, respectively.
＜実施形態２＞
　隣接する第１のセルフレームと第２のセルフレームとで、局所的に厚くなった部分をセルフレームの平面方向にずらす構成として、第１のセルフレームに備わる枠体の大きさと、第２のセルフレームに備わる枠体の大きさとを異ならせても構わない。大きさの異なる枠体を備えるセルフレームを重ねれば、積層方向に直交する方向から見た第１のセルフレームに備わる枠体の外端部と、第２のセルフレームに備わる枠体の外端部とがずれるし、第１のセルフレームの枠体における局所的に厚くなった部分と、第２のセルフレームの枠体における局所的に厚くなった部分とがセルフレームの平面方向にずれる。 <Embodiment 2>
As a configuration in which the locally thickened portion is shifted in the plane direction of the cell frame between the adjacent first cell frame and the second cell frame, the size of the frame provided in the first cell frame, The size of the frame provided in the cell frame may be different. If cell frames having different sizes of frames are stacked, the outer edge of the frame provided in the first cell frame and the outside of the frame provided in the second cell frame are viewed from the direction orthogonal to the stacking direction. The edge part is shifted, and the locally thickened part in the frame of the first cell frame and the locally thickened part in the frame of the second cell frame are shifted in the plane direction of the cell frame. .
＜実施形態３＞
　セルフレーム１２０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６に示す形状としても構わない。 <Embodiment 3>
The shape of the cell frame 120 is not limited to the shape shown in FIG. 4, and may be the shape shown in FIG. 6, for example.
　図６のセルフレーム１２０は、枠体１２２に備わるスリット１２３ｓ，１２４ｓ，１２５ｓ，１２６ｓが概略Ｊ字状である。具体的には、双極板１２１の横方向の側面の位置から外方側に伸びた後、内方側に湾曲してから各マニホールド１２３，１２４，１２５，１２６に繋がっている。 In the cell frame 120 of FIG. 6, slits 123s, 124s, 125s, and 126s provided in the frame body 122 are substantially J-shaped. Specifically, after extending outward from the lateral side position of the bipolar plate 121, the bipolar plate 121 is connected to the manifolds 123, 124, 125, 126 after being bent inward.
　このような形状のセルフレーム１２０においても、隣接する二つのセルフレームの外端部をずらすことで、枠体１２２の損傷を抑制できる。 Also in the cell frame 120 having such a shape, damage to the frame body 122 can be suppressed by shifting the outer end portions of two adjacent cell frames.
＜実施形態４＞
　セルフレーム１２０の形状は、図７に示す形状とすることもできる。図７のセルフレーム１２０では、枠体１２２に備わるスリット１２３ｓ，１２４ｓ，１２５ｓ，１２６ｓが縦方向と横方向に複雑に湾曲して各マニホールド１２３，１２４，１２５，１２６に繋がっている。 <Embodiment 4>
The shape of the cell frame 120 may be the shape shown in FIG. In the cell frame 120 of FIG. 7, slits 123 s, 124 s, 125 s, 126 s provided in the frame body 122 are complicatedly curved in the vertical direction and the horizontal direction and connected to the manifolds 123, 124, 125, 126.
　このような形状のセルフレーム１２０においても、隣接する二つのセルフレームの外端部をずらすことで、枠体１２２の損傷を抑制できる。 Also in the cell frame 120 having such a shape, damage to the frame body 122 can be suppressed by shifting the outer end portions of two adjacent cell frames.
＜実施形態５＞
　セルフレーム１２０の形状は、図８に示す形状とすることもできる。図８のセルフレーム１２０には、マニホールド１２３，１２４，１２５，１２６から双極板１２１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１２０間に配置するガスケット１２９にスリットを形成している。図５のガスケット１２９は、セルフレーム１２０の紙面手前側に重ねるガスケット１２９である。このガスケット１２９には、マニホールド１２３，１２４，１２５，１２６と、マニホールド１２３に繋がる切欠き状の入口スリット１２３ｓと、マニホールド１２５に繋がる切欠き状の出口スリット１２５ｓと、が設けられている。ここで、図示しないが、セルフレーム１２０の紙面裏側に重ねるガスケット１２９には、マニホールド１２３，１２４，１２５，１２６と、マニホールド１２４に繋がる切欠き状の入口スリット１２４ｓと、マニホールド１２６に繋がる切欠き状の出口スリット１２６ｓと、が設けられている。 <Embodiment 5>
The shape of the cell frame 120 may be the shape shown in FIG. In the cell frame 120 of FIG. 8, slits that connect the manifolds 123, 124, 125, and 126 to the bipolar plate 121 are not formed. Instead, a slit is formed in the gasket 129 disposed between the adjacent cell frames 120. The gasket 129 in FIG. 5 is a gasket 129 that is stacked on the front side of the cell frame 120 in the drawing. The gasket 129 is provided with manifolds 123, 124, 125, and 126, a notched inlet slit 123 s connected to the manifold 123, and a notched outlet slit 125 s connected to the manifold 125. Here, although not shown, the gasket 129 overlapped on the back side of the paper surface of the cell frame 120 has manifolds 123, 124, 125, 126, a notch-shaped inlet slit 124 s connected to the manifold 124, and a notch shape connected to the manifold 126. Outlet slit 126s.
　このような形状のセルフレーム１２０においても、隣接する二つのセルフレームの外端部をずらすことで、枠体１２２の損傷を抑制できる。 Also in the cell frame 120 having such a shape, damage to the frame body 122 can be suppressed by shifting the outer end portions of two adjacent cell frames.
＜実施形態６＞
　実施形態１～５では、枠体１２２の幅方向（紙面左右方向）の長さが、枠体１２２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１２０を説明した。これに対して、幅方向の長さよりも長さ方向の長さが大きいセルフレームとすることもできる。 <Embodiment 6>
In the first to fifth embodiments, the cell frame 120 has been described in which the length of the frame body 122 in the width direction (left and right direction in the drawing) is larger than the length of the frame body 122 in the length direction (up and down direction in the drawing). On the other hand, a cell frame having a length in the length direction larger than the length in the width direction may be used.
＜実施形態７＞
　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。 <Embodiment 7>
In addition, a cell frame having the same length in the length direction and the width direction may be used.
＜試験例＞
　セルスタックに備わる全てのセルフレーム対における外端部のずれ量が０．５ｍｍ～３．０ｍｍ前後であるセルスタック（試験体Ａ）を用意した。また、セルスタックに備わる全てのセルフレーム対における外端部のずれ量が０．３ｍｍ前後であるセルスタック（試験体Ｂ）を用意した。そして、セルスタックの締付機構２３０の締め付け力を徐々に大きくしていった。その結果、所定の締め付け力となったときに、試験体Ｂに備わるセルフレームの枠体に割れが生じたが、同じ締め付け力で締め付けられた試験例Ａに備わるセルフレームの枠体には割れが生じなかった。 <Test example>
A cell stack (test body A) was prepared in which the shift amount of the outer end portion of all cell frame pairs provided in the cell stack was around 0.5 mm to 3.0 mm. In addition, a cell stack (test body B) in which the shift amount of the outer end portion of all cell frame pairs provided in the cell stack is about 0.3 mm was prepared. The tightening force of the cell stack tightening mechanism 230 was gradually increased. As a result, the cell frame of the test body B was cracked when the predetermined tightening force was reached, but the cell frame of the test example A tightened with the same tightening force was cracked. Did not occur.
　この試験例の結果から、セルフレーム対を構成する第１のセルフレームに備わる枠体の外端部と、第２のセルフレームに備わる枠体の外端部とを０．５ｍｍ以上ずらすことが、セルスタックの締め付け時のセルフレームの割れを抑制する上で有効であることが分かった。 From the result of this test example, it is possible to shift the outer end portion of the frame body provided in the first cell frame constituting the cell frame pair and the outer end portion of the frame body provided in the second cell frame by 0.5 mm or more. It was found that it is effective in suppressing cracking of the cell frame when the cell stack is tightened.
１　ＲＦ電池（レドックスフロー電池）
２　セルスタック
３，４　セルフレーム対
５　外端部
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
　１２０，１２０Ａ，１２０Ｂ，１２０Ｃ　セルフレーム
　１２１　双極板　１２２　枠体
　１２３，１２４　給液用マニホールド
　１２５，１２６　排液用マニホールド
　１２３ｓ，１２４ｓ　入口スリット　１２５ｓ，１２６ｓ　出口スリット
　１２９　ガスケット
　１９０　給排板　２００　サブスタック
　２１０，２２０　エンドプレート
　１２７　シール部材
　２３０　締付機構 1 RF battery (redox flow battery)
2 Cell stacks 3 and 4 Cell frame pair 5 Outer end portion 100 Cell 101 Diaphragm 102 Positive electrode cell 103 Negative electrode cell 100P Positive electrode circulation mechanism 100N Negative electrode circulation mechanism 104 Positive electrode 105 Negative electrode 106 Positive electrode electrolyte tank 107 Negative electrode electrolyte Tank 108, 109, 110, 111 Conduit 112, 113 Pump 120, 120A, 120B, 120C Cell frame 121 Bipolar plate 122 Frame 123, 124 Supply manifold 125, 126 Drain manifold 123s, 124s Inlet slit 125s, 126s Exit slit 129 Gasket 190 Supply / discharge plate 200 Sub-stack 210, 220 End plate 127 Seal member 230 Tightening mechanism

Claims (13)

  1. 　レドックスフロー電池に用いられるセルスタックであって、
    　前記セルスタックは、枠体を有する複数のセルフレームを積層した積層体を備え、
    　複数の前記セルフレームは、隣接する第１のセルフレームと第２のセルフレームとを有するセルフレーム対を少なくとも一組含み、
    　前記第１のセルフレームの前記枠体は、第１の外端部を有し、
    　前記第２のセルフレームの前記枠体は、前記第１の外端部に隣接する第２の外端部を有し、
    　前記第１の外端部は、前記複数のセルフレームの積層方向と交差する方向において、前記第２の外端部に対して０．５ｍｍ以上２０ｍｍ以下ずれているセルスタック。     A cell stack used for a redox flow battery,
    The cell stack includes a laminate in which a plurality of cell frames having a frame are laminated,
    The plurality of cell frames include at least one set of cell frame pairs each having a first cell frame and a second cell frame adjacent to each other,
    The frame of the first cell frame has a first outer end;
    The frame of the second cell frame has a second outer end adjacent to the first outer end;
    The cell stack in which the first outer end portion is shifted by 0.5 mm or more and 20 mm or less with respect to the second outer end portion in a direction intersecting with a stacking direction of the plurality of cell frames.
  2. 　前記積層方向に隣接する一対の前記セルフレームのいずれもが、前記セルフレーム対の要件を満たす請求項１に記載のセルスタック。 The cell stack according to claim 1, wherein any of the pair of cell frames adjacent in the stacking direction satisfies the requirements for the cell frame pair.
  3. 　前記第１のセルフレームの枠体は、前記第２のセルフレームの枠体と同一形状である請求項１または請求項２に記載のセルスタック。 The cell stack according to claim 1 or 2, wherein a frame of the first cell frame has the same shape as a frame of the second cell frame.
  4. 　前記第１のセルフレームの枠体は、前記第２のセルフレームの枠体と、前記積層方向から見たときの大きさが異なる請求項１または請求項２に記載のセルスタック。 The cell stack according to claim 1 or 2, wherein the frame of the first cell frame is different from the frame of the second cell frame when viewed from the stacking direction.
  5. 　前記セルフレームは、前記枠体の内側に配される双極板を備える請求項１から請求項４のいずれか１項に記載のセルスタック。 The cell stack according to any one of claims 1 to 4, wherein the cell frame includes a bipolar plate disposed inside the frame.
  6. 　前記枠体が樹脂で構成されている請求項１から請求項５のいずれか１項に記載のセルスタック。 The cell stack according to any one of claims 1 to 5, wherein the frame is made of resin.
  7. 　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
    　前記長さ方向と前記幅方向の両方で、前記第１のセルフレームの前記第１の外端部と、前記第２のセルフレームの前記第２の外端部とがずれている請求項１から請求項６のいずれか１項に記載のセルスタック。     The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
    2. The first outer end portion of the first cell frame and the second outer end portion of the second cell frame are misaligned in both the length direction and the width direction. The cell stack according to claim 6.
  8. 　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
    　各前記枠体の前記長さ方向の長さが前記幅方向の長さよりも大きい請求項１から請求項７のいずれか１項に記載のセルスタック。     The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
    The cell stack according to any one of claims 1 to 7, wherein a length of each frame body in the length direction is larger than a length in the width direction.
  9. 　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
    　各前記枠体の前記長さ方向の長さが前記幅方向の長さよりも小さい請求項１から請求項７のいずれか１項に記載のセルスタック。     The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
    The cell stack according to claim 1, wherein a length of each frame body in the length direction is smaller than a length in the width direction.
  10. 　前記枠体は、その一端側に配置される給液マニホールドと他端側に配置される排液マニホールドとを備え、前記給液マニホールドと前記排液マニホールドとが離隔する方向が前記枠体の長さ方向で、前記長さ方向と前記積層方向に直交する方向が前記枠体の幅方向であり、
    　各前記枠体の前記長さ方向の長さが前記幅方向の長さと同じである請求項１から請求項７のいずれか１項に記載のセルスタック。     The frame includes a liquid supply manifold disposed on one end side thereof and a drainage manifold disposed on the other end side, and a direction in which the liquid supply manifold and the drainage manifold are separated is a length of the frame body. The direction perpendicular to the length direction and the stacking direction is the width direction of the frame,
    The cell stack according to any one of claims 1 to 7, wherein a length of each frame body in the length direction is the same as a length in the width direction.
  11. 　さらに締付機構を備え、
    　前記締付機構は、複数の前記セルフレームに圧力を与えながら密着させるように構成されている請求項１から請求項１０のいずれか１項に記載のセルスタック。     In addition, a tightening mechanism
    The cell stack according to any one of claims 1 to 10, wherein the tightening mechanism is configured to closely contact the plurality of cell frames while applying pressure thereto.
  12. 　複数の前記セルスタックの積層方向の両側に配置される一対のエンドプレートを有し、
    　前記締付機構は、前記エンドプレートを介して複数の前記セルフレームに圧力を与えながら密着させるように構成されている請求項１１に記載のセルスタック。      Having a pair of end plates disposed on both sides in the stacking direction of the plurality of cell stacks;
    The cell stack according to claim 11, wherein the tightening mechanism is configured to closely contact a plurality of the cell frames while applying pressure to the end plate.
  13. 　請求項１から請求項１２のいずれか１項に記載のセルスタックを備えるレドックスフロー電池。 A redox flow battery comprising the cell stack according to any one of claims 1 to 12.
PCT/JP2016/079678 2016-10-05 2016-10-05 Cell stack and redox flow battery WO2018066093A1 (en)

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