WO2002101864A1 - Chassis de cellule pour cuve a oxydation redox et cuve a oxydation redox - Google Patents
Chassis de cellule pour cuve a oxydation redox et cuve a oxydation redox Download PDFInfo
- Publication number
- WO2002101864A1 WO2002101864A1 PCT/JP2002/004445 JP0204445W WO02101864A1 WO 2002101864 A1 WO2002101864 A1 WO 2002101864A1 JP 0204445 W JP0204445 W JP 0204445W WO 02101864 A1 WO02101864 A1 WO 02101864A1
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- WIPO (PCT)
- Prior art keywords
- frame
- cell
- redox flow
- electrolyte
- cell frame
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
- H01M8/0278—O-rings
-
- 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
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
-
- 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
-
- 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 frame for a redox flow battery which is effective for preventing an electrolyte from leaking out of a cell frame, and a redox flow battery using the cell frame.
- FIG. 8 is an explanatory diagram showing the operating principle of a conventional redox single-cell secondary battery.
- the battery comprises a cell 1 separated by a membrane 4 through which ions can pass into a positive cell 1A and a negative cell 1B.
- Each of the positive electrode cell 1A and the negative electrode cell 1B has a positive electrode 5 and a negative electrode 6 built therein.
- a positive electrode tank 1 for supplying and discharging a positive electrode electrolyte is connected to the positive electrode cell 1 A via conduits 7 and 8.
- a negative electrode tank 3 for supplying and discharging a negative electrode electrolytic solution is connected to the negative electrode cell 1 B via conduits 10 and 11.
- Each electrolyte uses an aqueous solution of ions whose valence changes, such as vanadium ions, and is circulated by pumps 9 and 12, and is charged and discharged as the valence changes of the ions at the positive electrode 5 and the negative electrode 6 I do.
- ions whose valence changes such as vanadium ions
- FIG. 9 is a schematic configuration diagram of a cell stack used for the battery.
- This battery usually uses a configuration called a cell stack 100 in which a plurality of cell frames 20 are stacked.
- a cell frame 20 In the cell stack 100, a cell frame 20, a positive electrode 5 made of carbon felt, a diaphragm 4, a negative electrode 6 made of carbon felt, and a cell frame 20 are repeatedly laminated in this order. At both ends of this laminate
- the cell stack 100 is configured by arranging the end plate, penetrating the long port 101 through the end plate, and tightening the nut.
- the cell frame 20 includes a bipolar plate 21 made of plastic carbon and a frame 22 formed on the outer periphery of the bipolar plate.
- the lower side and the upper side of the frame 22 usually have holes called manifolds 23A and 23B for supplying and discharging the electrolyte to each cell, and the electrolyte is led to the electrodes 5 and 6 by being connected to each manifold. Guide grooves 24 are provided.
- FIG. 10 is a partially enlarged view schematically showing a cross section in the vicinity of a frame when a conventional cell frame is stacked.
- a seal using a 0 ring disclosed in Japanese Patent Application Laid-Open No. 2000-260460 (see FIGS. 10 (a) to 10 (c)) and a device disclosed in Japanese Patent Application Laid-Open No. 8-791
- the seal using flat packing (see (d)) disclosed in Publication No. 3 is known.
- the cell frame 20a shown in FIG. 10 (a) is a position where the O-ring grooves 25 are opposed to each other on each side.
- the 0 ring 26 is arranged in the 0 ring groove 25.
- the cell frame 20b shown in (b) has an inner 0 ring groove 25a on one surface and an outer 0 ring groove 25b on the other surface. , And an inner peripheral O-ring 26a and an outer peripheral O-ring 26b are disposed in the respective grooves 25a and 25b.
- the cell frame 20c shown in (c) has an inner peripheral 0 ring groove 25a and an outer peripheral 0 ring groove 25b having different sizes on one side, each of which is provided in parallel, and similarly, each groove 25a, 25b
- the inner circumference 0 ring 26a and the outer circumference 0 ring 26b are arranged respectively.
- a flat packing 27 having a shape adapted to the cell frame 20d is arranged on both sides. Also, for batteries of relatively small size, seals by a welding method as described in the “Electricity Storage Battery Regulations” are also known.
- the cell stack using the above-mentioned conventional cell frame has the following problems.
- the flat packing ⁇ shown in Fig. 10 (d) is suitable for a large area cell frame that can provide a large capacity.
- the flat packing 27 is arranged and the cell frames 20d are stacked, if the flat packing 2 ⁇ is strictly arranged and the stacked self frames 20d are not evenly tightened with a plurality of long bolts ⁇ , It is difficult to prevent electrolyte leakage.
- the intervening diaphragm 4 is arranged on the inner peripheral 0-ring 26a and inside the outer peripheral 0-ring 26b. Therefore, extremely high cutting accuracy is required for processing the diaphragm 4. In addition, strict alignment is required between the cut diaphragm 4 and the cell frame, and the workability in producing the cell stack is extremely poor.
- a main object of the present invention is to provide a cell frame for a redox cell, which is effective for preventing leakage of an electrolyte to the outside of a cell frame and excellent in workability when assembling the cell. It is in.
- Another object of the present invention is to provide a redox flow battery using the cell frame. Disclosure of the invention
- the present invention relates to a redox cell-cell battery frame comprising a bipolar plate and a frame formed on the outer periphery of the bipolar plate, wherein both sides of the frame are pressed against a diaphragm and sealed with an electrolyte. It has an inner seal and an outer seal.
- the diaphragm When the cell frame for a redox flow battery of the present invention is laminated via a diaphragm, the diaphragm is sandwiched between an inner peripheral seal and an outer peripheral seal. At this time, the leakage of the electrolyte to the outside and the mixing of the electrolyte for each electrode are prevented mainly by the inner peripheral seal.
- An external seal prevents leakage of the electrolyte to the outside by preventing the breach of the diaphragm due to drying from propagating further inside. That is, the present invention prevents the rupture of the diaphragm from developing further inward than the portion sandwiched by the inner peripheral seal by sandwiching the diaphragm with both the inner seal and the outer seal. As described above, in the present invention, by arranging the seals twice, high reliability can be ensured with respect to the prevention of leakage of the electrolytic solution to the outside of the cell frame.
- the arrangement of the outer seal allows the diaphragm to protrude from the periphery of the cell frame. Therefore, the processing accuracy of the diaphragm and the diaphragm Regardless of the strictness of the arrangement accuracy in the cell frame, the workability in producing the cell stack by stacking the cell frames of the present invention is extremely excellent. Further, by arranging the seals twice, the diaphragm interposed between the cell frames of the present invention is surely maintained in a wet state.
- the inner peripheral seal is an O-ring
- the outer peripheral seal may be a flat packing.
- the cell frame shall be provided with grooves suitable for flat packing and O-ring grooves.
- the positions of the grooves for fitting the O-ring and the flat packing be the same on both surfaces of the cell frame.
- the position of the seal in each cell frame may be shifted.
- the inner seal and the outer seal are spaced apart so that even if the diaphragm is dried and ruptured, the rupture does not easily propagate inside the inner seal. Specifically, it is desirable to leave an interval of 1 mm or more. This spacing refers to the distance between the center lines of both grooves.
- the cell frame of the present invention includes a manifold serving as a flow path for the electrolyte, and a guide groove for guiding the electrolyte from the manifold to the inside of the frame frame, and a cross-sectional area of the guide groove is 5 mm 2 or less. It is preferred that This cross-sectional area is the cross-sectional area of a single guide groove when there are multiple guide grooves.
- the cross-sectional area of the guide groove is increased, the loss due to the current flowing in the electrolyte increases due to the increase in the amount of the electrolyte flowing through one guide groove. Also, if the cross-sectional area of the guide groove is large, the tightening pressure will be supported by the space in the groove when the cell frames are stacked and tightened.
- the cross-sectional area of the guide groove is specified in order to keep the port due to the current flowing in the electrolyte solution low.
- two or more manifolds are provided on the upper side and the lower side of the cell frame.
- the manifold located on the lower side of the cell frame may be used for supplying each electrolyte, and the manifold located on the upper side may be used for discharging each electrolyte.
- Such a manifold preferably has a diameter of 1% to 5% with respect to the entire width of the cell frame in order to lower the pressure loss at the time of liquid passage.
- the distance between the centers of adjacent manifolds is preferably 5% to 50% of the entire width of the cell frame. The distance between the centers of the manifolds is defined because the flow of the electrolyte in the width direction within the cell frame can be uniformed.
- the cell frame of the present invention is formed so as to be transparent enough that the joining condition between the frame pieces and the joining condition between the frame piece and the bipolar plate can be easily grasped visually or the like.
- it may be formed by injection molding with a resin or the like.
- the method of integrating the frame and the bipolar plate is as follows: (1) Prepare two frame pieces obtained by injection molding, etc., join these frame pieces to form a frame, There are two methods: sandwiching the outer circumference of the bipolar plate between the inner circumferences of the pieces, and (2) forming the frame by injection molding using the bipolar plate as the core.
- each frame piece has a shape in which the positions of the manifold and the guide groove are point-symmetric with respect to the intersection of the diagonal lines of the frame pieces. Since the frame pieces that are symmetrical with each other can be formed by changing the direction and joining them as they are, manufacturing using the same mold is possible, and the productivity is excellent.
- the diaphragm has a thickness of 400 m or less. If the thickness of the diaphragm is 400 m or less, it is preferable in terms of improving the battery efficiency by reducing the internal resistance.
- the electric terminal for extracting electricity from the electrode and the supply / discharge unit for supplying / discharging the electrolyte may be arranged on opposing surfaces in the cell stack. It is good. Since the electric terminals and the supply / discharge unit are arranged in different directions, maintenance is easy. Also, the workability when assembling the battery is excellent. Further, even if the electrolyte leaks from the supply / discharge portion, the electrolyte is hardly applied to the electric terminals, so that there is no danger of current flowing in the electric system, which is preferable. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a plan view of a frame piece constituting the cell frame of the present invention.
- FIG. 2 is an enlarged view of a part near the frame when the cell frames of the present invention are stacked.
- FIG. 3 is a partially enlarged view schematically showing a cross section near the frame when the cell frames of the present invention are stacked.
- FIG. 4 is a top view schematically showing a cell stack using the cell frame of the present invention.
- FIG. 5 is a front view of a cell stack using the cell frame of the present invention.
- FIG. 6 is a left side view of a cell stack using the cell frame of the present invention.
- FIG. 7 is a right side view of a cell stack using the cell frame of the present invention.
- FIG. 1 is a plan view of a frame piece constituting the cell frame of the present invention.
- FIG. 2 is an enlarged view of a part near the frame when the cell frames of the present invention are stacked.
- FIG. 3 is a partially enlarged view schematically
- FIG. 8 is an explanatory diagram showing the operating principle of a conventional redox cell.
- FIG. 9 is a schematic configuration diagram of a cell stack used for a redox flow battery.
- FIG. 10 is a partially enlarged view schematically showing a cross section near the frame frame when a conventional cell frame is stacked.
- the redox flow battery of the present invention has the same operating principle as the redox cell battery shown in FIGS. 8 and 9, and basically has the same overall structure of the cell stack used. The components of the cell dock will be described in detail below.
- FIG. 1 is a plan view of a frame piece constituting a cell frame
- FIG. 2 is a partially enlarged view of the vicinity of the frame when the cell frames of the present invention are stacked
- FIG. 3 is a cross-sectional view of the vicinity of the frame. It is the elements on larger scale shown in FIG. In the drawings, the same reference numerals indicate the same items.
- the cell frame 30 of the present invention includes a bipolar plate 21 and a frame frame 31 formed on the outer periphery of the bipolar plate 21 as shown in FIG. 2 and a diaphragm 4 through which ions in the electrolyte can pass (see FIG. 3). Are laminated through the intermediary.
- An inner seal 32 (same) and an outer seal 33 (same) are provided on both sides of the frame 31 to prevent leakage of the electrolyte to the outside. Then, when the cell frames 30 are stacked via the diaphragm 4, the diaphragms 4 are pressed and sandwiched by the seals 32 and 33.
- the bipolar plate 21 is arranged between a pair of frame pieces 31a, 31b constituting the frame frame 31, and the outer peripheral part of the bipolar plate 21 is joined to the inner peripheral parts of the frame pieces 31a, 31b. ing.
- the frame pieces 31a and 31b constituting such a cell frame 30 are formed by injection molding or the like using plastic or rubber such as pinyl chloride resin, polypropylene, polyethylene, fluororesin, or epoxy resin.
- the material of the frame pieces 31a and 31b can be any type as long as it satisfies acid resistance, electrical insulation, and mechanical strength. Various things are available.
- an inner seal groove 34 (see FIG. 3) and an inner seal groove 34 and an outer seal groove 35 for arranging the outer seal 33 (same) are arranged in parallel along the periphery. (See Figure 1). At least 1 mm is left between both seal grooves 34 and 35.
- both seal grooves 34 and 35 are provided at the same position on both surfaces of the cell frame 30.
- the seal grooves 34 and 35 may be provided at positions shifted on the front and back of the cell frame.
- the double seals 32 and 33 By arranging the double seals 32 and 33 in the cell frame 30 as described above, it is possible to prevent the electrolyte from leaking out of the cell frame 30 when they are stacked. That is, when a plurality of the cell frames 30 are stacked and tightened with a long port, the diaphragm 4 (see FIG. 3) is pressed and sandwiched between the inner seals 32 facing each other, so that the electrolytic solution travels along the diaphragm 4 and the electrolyte flows through the cell frame 30. To prevent leakage to the outside and prevent mixing of electrolyte for each electrode.
- a plurality of manifolds 23A and 23B are formed as shown in FIG.
- these manifolds 23A and 23B serve as electrolyte flow paths extending in the stacking direction.
- four manifolds are provided on each of the upper and lower sides, for a total of eight, and the manifolds arranged in the long side direction of the self-frame 30 are alternately used as the manifold 23A for the positive electrode electrolyte and the manifold 23B for the negative electrode electrolyte. Use.
- the manifolds 23A and 23B located on the lower side of the cell frame 30 are for supplying the positive electrode electrolyte and the negative electrode in order, and those located on the upper side are for discharging the positive electrode electrolyte and the negative electrode electrolyte in order. .
- the diameter of these manifolds 23A and 23B is In order to reduce the pressure loss when the electrolyte circulates, it may be appropriately changed in consideration of the number provided, the size of the cell frame, and the like. Also, the distance between the centers of the manifolds 23A and 23B may be appropriately changed in consideration of the number provided and the size of the self-frame.
- An O-ring (not shown) for sealing between the cell frames 30 is fitted into a circular groove 28 formed around the manifold ⁇ .
- the cell frame 30 is provided with an electrolyte solution flow portion 24A on the outer surface.
- the circulation section 24A is connected to the manifold 23A and is provided with a plurality of guide grooves 24A-1 through which the electrolyte flows, and the electrolyte flowing through the guide grooves 24A-1 to the edge of the positive electrode 5 (see FIG. 2).
- a rectifying unit 24A-2 that diffuses along.
- the guide groove 24A- ⁇ has a rectangular cross section and a curved corner. In this example, the loss due to the current flowing through the electrolyte is suppressed by setting the cross-sectional area of each guide groove 24 ⁇ - ⁇ to 5 mm 2 or less and providing a plurality of guide grooves.
- the rectifying portion 24A-2 is a rectangular uneven portion formed along the long side of the cell frame 30, and the electrolytic solution is guided to the positive electrode 5 through the concave portion.
- Such guide grooves 24A-1 and rectifying sections 24A-2 are not limited to the shape and the number of the present embodiment.
- the frame pieces had a point-symmetrical shape (FIG. 1). That is, the positions of the flow portions 24A-1 and 24A-2 on one long side and the other long side are point-symmetrical with respect to the intersection of the diagonal lines of the frame.
- the cell frame to which the frame pieces are joined also has a point-symmetrical shape, so that the flow portion is arranged in the same direction regardless of which one of the long side and the other long side is facing upward. Lamination work can be performed without worrying about the vertical direction.
- the frame pieces can be molded from the same mold, resulting in excellent productivity.
- Such a cell frame 30 preferably has a thickness of 2 mm or more and 8 MI or less, and more preferably 3 iM or more and 6 mm or less. More than 2mi If it is less than 2 mm, it is difficult to form a seal groove, and the positive electrode 5 and the negative electrode 6 (see FIG. 3) arranged between the self-frames 30 cannot be sufficiently compressed. This is because the contact resistance with the same increases. The reason why the thickness is reduced to 8 mm or less is that the electrodes 5 and 6 also become thicker when the thickness is longer than 8 min, so that the pressure loss for passing a required amount of electrolyte increases.
- the liquid sealing property is sufficiently secured, and the performance of the battery when used in a redox flow battery is improved. Improve.
- the guide groove 24A-1 and the rectifying section 24A-2 are covered with a plastic protection plate 29 when they are laminated.
- the protection plate 29 has a circular hole formed at a position corresponding to the manifold 23A, and has a size to cover the entire surface of the guide groove 24A-1 and the rectifying portion 24A- and the upper part of the rectifying portion 24A-2. Have.
- the protection plate 29 covers the upper portions of the guide groove 24A-1 and the rectifying portion 24A-2 to form a flow passage for the electrolyte.
- the protection plate 29 covers the concave and convex guide grooves 24A-1 and the rectifying section 24A-2, so that when the layers are laminated, the diaphragm 4 directly contacts the guide grooves 24A-1 and the rectifying section 24A-2. To prevent the diaphragm 4 from being torn.
- the reason why the size of the protective plate 29 is set to cover slightly above the rectifying portion 24A-1 is that the upper and lower ends of the positive electrode 5 or the negative electrode are sandwiched between the protective plate 29 and the bipolar plate 21 to hold down the electrodes. This is to improve the workability when stacking the cell frames 30.
- the protective plate 29 has a thickness of 1 mm or less.
- the cell frame 30 has a recess 29a corresponding to the outer shape of the protective plate 29 so that the protective plate 29 can be easily positioned (see FIG. 1).
- the outer edge of the bipolar plate 21 is located on the dashed line indicated by A, B, and C, and the front and back of the bipolar plate 21 are joined to the back side of the location where the rectifying part 24A-2 is formed. It is. With this configuration, guide groove 24A-1 and rectifier The electrolyte passing through section 24A-2 does not directly reach bipolar plate 21.
- the positive electrode 5 is disposed along the upper edge of the rectifier 24A-2.
- an O-ring is used for both the inner seal and the outer seal.
- the wire diameter of the 0 ring is preferably 3 mm or less, and the wire diameter may be different between the inner seal 32 (see FIG. 3) and the outer seal 33 (same).
- the outer diameter of the O-ring may be appropriately changed according to the size of the cell frame 30.
- a material through which ions can pass such as an ion exchange membrane is used.
- a diaphragm 4 is formed of, for example, vinyl chloride, fluororesin, polyethylene, polypropylene, or the like.
- the thickness is 400 / ⁇ or less, particularly preferably 200 / m or less, and the size is slightly larger than the outer size of the frame 31 of the cell frame 30. The lower limit of the thickness is at present.
- the bipolar plate 21 is a rectangular plate made of plastic resin and has a positive electrode 5 on one side and a negative electrode 6 on the other side as shown in FIG.
- a bipolar plate 21 is preferably formed from a material containing graphite, carbon fine particles, and chlorine.
- the thickness is 0.1 to l nim, and the size is slightly larger than the rectangular space formed on the inner periphery of the frame 31.
- the electrodes 5 and 6 are made of carbon fiber. The size of these electrodes 5 and 6 is the size corresponding to the rectangular space formed on the inner circumference of the frame 31. I do.
- the frame pieces 31a and 31b are molded by a mold.
- a pair of frame pieces 31a and 31b are prepared, and the outer peripheral portion of the bipolar plate 21 is joined to the inner peripheral portion thereof with an adhesive to form the self-frame 30.
- the cell frame 30 is formed of a transparent material so that the joining state of the frame pieces 31a and 31b can be grasped.
- the cell frame 30 of the present invention is laminated with electrodes and a diaphragm.
- FIG. 4 is a top view schematically showing a cell stack 40 using the cell frame 30 of the present invention
- FIG. 5 is a front view of the cell stack 40
- FIG. 6 is a left side view thereof
- FIG. 7 is a right side view thereof. is there.
- the same symbols indicate the same items.
- the positive electrode 5 is arranged on one surface of the bipolar plate 21 of the cell frame 30 and the negative electrode 6 is arranged on the other surface, and pressed by the protective plate 29 as shown in FIG.
- the inner seal 32 (see FIG. 3) and the outer seal 33 (same) are arranged in the inner seal groove 34 and the outer seal groove 35 on both sides of the cell frame 30.
- the cell stack 40 is formed by laminating a plurality of cell frames 30 each having the bipolar plate 21, the electrodes 5, 6 and the inner peripheral seal 32, and the outer peripheral seal 33, and sequentially forming an end frame 41 on both sides thereof, and a plastic made of vinyl chloride.
- the plate 42 and the end plate 43 are arranged, and a plurality of long ports 44 penetrating from one end plate 43 to the other end plate 43 are formed by tightening.
- the end frame 41 is preferably provided with a plastic carbon sheet on the inner periphery of the copper plate.
- the surface treatment of the copper plate may be performed by plating, thermal spraying, vapor deposition or the like.
- the end frame 41 is provided with an electric terminal 45 for supplying electricity.
- the plastic plate 42 is provided with a supply / discharge unit 46 for supplying and discharging the electrolyte.
- the thickness of this plastic plate 42 is 10 ⁇ 50 min is preferred.
- the end plate 43 has a hole (not shown) through which the long bolt 44 penetrates on the outer peripheral edge 43a, and supports the supporting portions 431) in a rectangular space in the outer peripheral edge 43a in a grid pattern. It is equipped.
- the support portion 43b in a lattice shape, the end plate 43 can uniformly press each part of the cell frame 30 (see Fig. 4) when tightened with nuts 50 screwed into both ends of the long porto 44. it can.
- the same pressing force as the conventional end plate 102 (see FIG. 9) in which the flat plate portion and the lattice portion are integrated can be maintained.
- the end plate 43 can be formed with a small amount of material and can be reduced in weight, so that the burden on the operator when assembling the cell stack 40 can be reduced.
- a coil spring 48 is arranged on the outer periphery of the end of the long port 44 to absorb the thermal expansion and contraction of the cell stack.
- the long bolt 44 has an insulating coating at the center.
- the diaphragm 4 is sandwiched between the cell frames, and the outer edge of the diaphragm 4 may be slightly exposed from the outer edge of the cell frame. Since the diaphragm 4 is impregnated with the electrolytic solution, conduction is established when the diaphragm 4 comes into contact with the diaphragm 4 exposed from the outer edge of the cell frame. Therefore, by providing an insulating coating on the long port 44 disposed close to the outer edge of the cell frame, conduction through the long port can be prevented.
- the end plate is insulated from the ground by the support insulator 47, and furthermore, the laminated body of the cell frame and the diaphragm and the long port are also insulated.
- the insulating coating may be applied by painting, mounting an insulating heat-shrinkable tube, or winding an insulating tape.
- the support insulator 47 also functions as a support for the cell stack 40 while ensuring insulation between the cell stack 40 and the ground.
- the electrolyte supply port 46A 46B and the drain port 46A '46B' are provided on the surface opposite to the surface on which the electric terminals 45 are arranged in the cell socket 40. Have been placed.
- the electrolyte supply port 46A is for the positive electrode
- the electrolyte supply port 46B is for the negative electrode
- the electrolyte drain port 46A ' is for the positive electrode
- the electrolyte drain port 46B' is for the negative electrode.
- the plate placed above the cell stack 40 is a cover 49.
- a redox mouth secondary battery was constructed using the above cell stack, and the battery performance and dischargeable power were measured.
- the specifications and measurement results of the material and size of the cell stack are as follows.
- Seal groove width 3mm, depth l mm, groove interval 5mm
- ABS acrylonitrile butadiene styrene Copolymer
- Composition Vanadium ion concentration: 2.0 mol / L, free sulfuric acid concentration: 2.0 mol / L, added phosphoric acid concentration: 0.3 mol / L
- Example 1 Using the cell of the present invention, a redox primary battery different from that of Example 1 was prepared, and the battery performance and the dischargeable electric energy were measured. The differences between the material and size of the cell stack, etc. from Example 1 and the measurement results are shown below.
- Seal groove width 2mm, depth lmm, groove spacing 5
- Ratio of manifold diameter to total width of cell frame 2%
- the double seal of the inner and outer seals can more effectively prevent the electrolyte from leaking to the outside of the cell frame.
- the electrolyte hardly leaks out of the cell frame from the breach.
- the diaphragm Since the diaphragm is allowed to protrude from the outer frame of the cell frame, there is no need for high-precision diaphragm processing or strict arrangement of the diaphragm, and the battery assembly work is extremely excellent.
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02724709A EP1411576B1 (en) | 2001-06-12 | 2002-05-07 | Cell frame for redox flow battery, and redox flow battery |
CA002450517A CA2450517C (en) | 2001-06-12 | 2002-05-07 | Cell frame for redox flow battery, and redox flow battery |
AU2002255311A AU2002255311B9 (en) | 2001-06-12 | 2002-05-07 | Cell frame for redox flow battery and redox flow battery |
US10/480,117 US20040170893A1 (en) | 2001-06-12 | 2002-05-07 | Cell frame for redox flow cell and redox flow cell |
US11/979,670 US7670719B2 (en) | 2001-06-12 | 2007-11-07 | Cell stack for redox flow battery, and redox flow battery |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001177221A JP3682244B2 (ja) | 2001-06-12 | 2001-06-12 | レドックスフロー電池用セルフレーム及びレドックスフロー電池 |
JP2001-177221 | 2001-06-12 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10480117 A-371-Of-International | 2002-05-07 | ||
US11/979,670 Continuation US7670719B2 (en) | 2001-06-12 | 2007-11-07 | Cell stack for redox flow battery, and redox flow battery |
Publications (1)
Publication Number | Publication Date |
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WO2002101864A1 true WO2002101864A1 (fr) | 2002-12-19 |
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ID=19018094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2002/004445 WO2002101864A1 (fr) | 2001-06-12 | 2002-05-07 | Chassis de cellule pour cuve a oxydation redox et cuve a oxydation redox |
Country Status (7)
Country | Link |
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US (2) | US20040170893A1 (ja) |
EP (1) | EP1411576B1 (ja) |
JP (1) | JP3682244B2 (ja) |
CN (1) | CN1531761A (ja) |
CA (1) | CA2450517C (ja) |
TW (1) | TW541737B (ja) |
WO (1) | WO2002101864A1 (ja) |
Cited By (6)
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- 2002-05-07 CN CNA028116275A patent/CN1531761A/zh active Pending
- 2002-05-07 EP EP02724709A patent/EP1411576B1/en not_active Expired - Lifetime
- 2002-05-07 US US10/480,117 patent/US20040170893A1/en not_active Abandoned
- 2002-05-07 WO PCT/JP2002/004445 patent/WO2002101864A1/ja active IP Right Grant
- 2002-05-07 CA CA002450517A patent/CA2450517C/en not_active Expired - Lifetime
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2007
- 2007-11-07 US US11/979,670 patent/US7670719B2/en not_active Expired - Fee Related
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JPS63216271A (ja) * | 1987-03-04 | 1988-09-08 | Kansai Electric Power Co Inc:The | 電解液循環型2次電池 |
JPH0515320U (ja) | 1991-07-31 | 1993-02-26 | 住友電気工業株式会社 | 積層型二次電池 |
JPH067157U (ja) * | 1992-06-29 | 1994-01-28 | 住友電気工業株式会社 | レドックスフロー電池のセル |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016072255A1 (ja) * | 2014-11-05 | 2016-05-12 | 住友電気工業株式会社 | 電解液循環型電池 |
JP2016091835A (ja) * | 2014-11-05 | 2016-05-23 | 住友電気工業株式会社 | 電解液循環型電池 |
WO2017150011A1 (ja) * | 2016-02-29 | 2017-09-08 | 住友電気工業株式会社 | レドックスフロー電池 |
US10749202B2 (en) | 2016-02-29 | 2020-08-18 | Sumitomo Electric Industries, Ltd. | Redox flow battery |
CN108365440A (zh) * | 2017-01-11 | 2018-08-03 | 日本压着端子制造株式会社 | 基板对基板连接器 |
WO2019030817A1 (ja) * | 2017-08-08 | 2019-02-14 | 住友電気工業株式会社 | レドックスフロー電池、及びレドックスフロー電池の運転方法 |
WO2019167144A1 (ja) * | 2018-02-27 | 2019-09-06 | 住友電気工業株式会社 | セルスタック、及びレドックスフロー電池 |
WO2019167142A1 (ja) * | 2018-02-27 | 2019-09-06 | 住友電気工業株式会社 | セルスタック、及びレドックスフロー電池 |
JPWO2019167142A1 (ja) * | 2018-02-27 | 2021-02-25 | 住友電気工業株式会社 | セルスタック、及びレドックスフロー電池 |
JP6991468B2 (ja) | 2018-02-27 | 2022-01-12 | 住友電気工業株式会社 | セルスタック、及びレドックスフロー電池 |
US11527770B2 (en) | 2018-02-27 | 2022-12-13 | Sumitomo Electric Industries, Ltd. | Cell stack and redox flow battery |
Also Published As
Publication number | Publication date |
---|---|
US20080081247A1 (en) | 2008-04-03 |
JP2002367659A (ja) | 2002-12-20 |
CA2450517C (en) | 2009-08-25 |
CN1531761A (zh) | 2004-09-22 |
US7670719B2 (en) | 2010-03-02 |
EP1411576A4 (en) | 2009-09-23 |
US20040170893A1 (en) | 2004-09-02 |
CA2450517A1 (en) | 2002-12-19 |
JP3682244B2 (ja) | 2005-08-10 |
AU2002255311B2 (en) | 2007-03-29 |
EP1411576A1 (en) | 2004-04-21 |
EP1411576B1 (en) | 2011-10-12 |
TW541737B (en) | 2003-07-11 |
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