WO2021091025A1 - Structure échangeuse de chaleur à électrolyte et système à flux redox l'utilisant - Google Patents

Structure échangeuse de chaleur à électrolyte et système à flux redox l'utilisant Download PDF

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Publication number
WO2021091025A1
WO2021091025A1 PCT/KR2020/002550 KR2020002550W WO2021091025A1 WO 2021091025 A1 WO2021091025 A1 WO 2021091025A1 KR 2020002550 W KR2020002550 W KR 2020002550W WO 2021091025 A1 WO2021091025 A1 WO 2021091025A1
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WIPO (PCT)
Prior art keywords
electrolyte
heat exchange
cell
redox flow
frame
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PCT/KR2020/002550
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English (en)
Korean (ko)
Inventor
나경록
송승희
박지은
이호민
김수환
이상훈
Original Assignee
주식회사 코리드에너지
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Priority claimed from KR1020190140488A external-priority patent/KR102308407B1/ko
Priority claimed from KR1020200019769A external-priority patent/KR102308408B1/ko
Application filed by 주식회사 코리드에너지 filed Critical 주식회사 코리드에너지
Publication of WO2021091025A1 publication Critical patent/WO2021091025A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • 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
    • H01M8/0297—Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other
    • 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
    • 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 an electrolyte heat exchange structure and a redox flow battery system using the same, and more particularly, a heat exchange tube of a double tube structure is configured in a spiral shape on the outer circumferential surface of an electrolyte tank, the electrolyte is moved to the inner tube, and cooling water is circulated on the exterior. It relates to an electrolyte heat exchange structure capable of flowing into an electrolyte tank after the electrolyte flowing out of the redox flow battery is heat-exchanged by a heat exchange tube, and a redox flow battery system using the same.
  • renewable energy such as solar energy or wind energy is in the spotlight, and many studies are being conducted to commercialize and disseminate these.
  • renewable energy is greatly influenced by the location environment or natural conditions.
  • renewable energy since renewable energy has a strong output fluctuation, there is a disadvantage in that it cannot continuously and evenly supply energy.
  • a storage device capable of storing energy when the output is high and using the stored energy when the output is low is becoming important.
  • a redox flow battery RFB; Redox Flow Battery
  • Patent Publication No. 10-2011-0116624 Patent No. 10-1567569
  • Patent No. 10-1668106 Patent Publication No. 10-2017-0113120
  • Patent No. 10-1495434 As disclosed in et al., cell frames formed by combining a pair of flow cells on both sides of a bipolar plate are repeatedly stacked to enable high-capacity, advantageous for large-sized, easy capacity expansion, operation at room temperature, and low initial cost. Have.
  • the redox flow battery has a structure in which an electrolyte is circulated from an electrolyte tank, and a portion that is lost in energy efficiency during operation is generated as heat, and at this time, there is a problem in that precipitation is generated.
  • the precipitation generated as described above causes a problem of reducing the electric capacity or lowering the durability of the system, so temperature management of the electrolyte is very important, and therefore, a heat exchange device for controlling the temperature of the electrolyte must be installed. do.
  • Conventional redox flow battery systems mostly have a configuration in which a heat exchange device is configured between an electrolyte tank and a redox flow battery, and then the electrolyte flowing out of the redox flow battery flows into a heat exchanger, heat exchanged, and then flows into the electrolyte tank. have.
  • the size or volume of the heat exchange device increases according to the electric capacity of the redox flow battery system or the amount of electrolyte used, there is a problem in that the space is restricted when the heat exchange device is separately configured as described above.
  • a heat exchange device or a heat exchange tube may be located inside the electrolyte tank in order to solve the space constraint, but the operation is too complicated and time consuming, and when water leakage occurs in the heat exchange tube inside the electrolyte tank, the electrolyte is contaminated. There is a problem.
  • an object of the present invention is that a bipolar plate is positioned on the rear of one outer frame, and the inner frame covers the bipolar plate and is interlocked to the rear of the outer frame to be assembled into one cell frame. It is to provide an electrolyte heat exchange structure capable of providing a redox flow battery assembled with a stack capable of sealing without a sealing member or an adhesive member while the front of one cell frame is interlocked and coupled, and a redox flow battery system using the same.
  • an electrolyte tank for storing an electrolyte solution supplied to a redox flow battery; It has a double tube structure of the inner tube and the exterior, and is formed in a spiral shape on the outer circumference of the electrolyte tank, and the electrolyte flowing out of the redox flow battery flows into the inner tube, and the cooling water cooled from the heat exchanger is circulated to the exterior, so that the electrolyte is heat-exchanged by the cooling water.
  • An electrolyte heat exchange structure including a heat exchange tube that is then supplied to the electrolyte tank is provided.
  • the electrolyte tank includes: a housing having a cylindrical structure and storing the electrolyte; It is preferable to include an installation line formed in a spiral shape while having a groove corresponding to the diameter of the heat exchange tube on the outer circumferential surface of the housing so that the heat exchange tube is fitted and seated.
  • the housing is formed with a thermally conductive coating layer on the surface of the installation line.
  • the heat exchange tube is coated with Teflon on a double tube made of a flexible synthetic resin material.
  • the electrolyte solution heat exchange structure having the configuration as described above; Including a redox flow battery, the redox flow battery, a plurality of cell frames are arranged in a row to enable discharge according to the flow of the electrolyte stack; A pair of end plates configured on both sides of the stack to protect the stack from the outside; And an electrode plate configured to be electrically connected to each of the positive and negative terminals of a plurality of cell frames of the stack while being positioned on the end plate to collect electric charges of the entire cell frames that are discharged according to the flow of the electrolyte.
  • a dox flow battery system is provided.
  • the cell frame includes an outer frame having a rectangular panel shape with a center opened in a square; It is preferable to include an inner frame having a rectangular frame shape, and to constitute a flow cell by interlocking the inner frame on the rear opening of the outer frame.
  • the flow cell is interlocked and assembled into a cell frame while the inner frame 200 covers the rear edge of the bipolar plate on the rear surface of the outer frame while the front edge of the bipolar plate is seated on the rear opening of the outer frame. It is desirable.
  • a double-tube heat exchange tube is formed in a spiral shape on the outer circumferential surface of the electrolyte tank, and the electrolyte is moved to the inner tube, and the cooling water is circulated on the exterior, so that the electrolyte flowing out of the redox flow battery is exchanged by the heat exchange tube. It is then allowed to flow into the electrolyte tank, thereby minimizing location restrictions and preventing electrolyte contamination caused by the outflow of cooling water.
  • the redox flow battery is assembled into one cell frame by interlocking coupled to the back of the outer frame while the bipolar plate is located on the back of one outer frame and the inner frame covers the bipolar plate.
  • the front of one cell frame is interlocked, it can be assembled so that sealing is possible without a sealing member or an adhesive member.
  • FIG. 1 is a view showing the configuration of a redox flow battery system using an electrolyte heat exchange structure according to a preferred embodiment of the present invention
  • FIG. 2 is a schematic view showing the configuration of an electrolyte heat exchange structure according to a preferred embodiment of the present invention
  • FIG. 3 is a view showing the structure of an electrolyte tank and a heat exchange tube in the electrolyte heat exchange structure of FIG. 2;
  • FIGS. 4 and 5 are perspective views showing the front and rear surfaces of a redox flow battery according to a preferred embodiment of the present invention, respectively;
  • FIGS. 6 and 7 are exploded perspective views showing the front and rear surfaces of a redox flow battery according to a preferred embodiment of the present invention, respectively;
  • FIGS. 8 and 9 are views showing the front and rear surfaces of a cell frame structure in the redox flow battery of FIGS. 6 and 7 respectively;
  • FIGS. 10 and 11 are views showing an embodiment in which a positive electrolyte and a negative electrolyte flow through the cell frame structure of the redox flow battery of FIGS. 6 and 7, respectively.
  • the electrolyte heat exchange structure includes an electrolyte tank 510 in which a positive electrolyte or a negative electrolyte supplied to the redox flow battery B is stored. , It has a double tube structure of the inner tube 521 and the exterior 522 and is configured in a spiral shape on the outer circumferential surface of the electrolyte tank 510, and the inner tube 521 is discharged from the redox flow battery (B) by the circulation pump 530.
  • the electrolyte is introduced and the cooling water cooled from the heat exchanger 540 is circulated to the exterior 522 so that the electrolyte is heat-exchanged by the cooling water and then supplied to the electrolyte tank 510, and provides a thermal insulation function to the electrolyte tank 510. And a heat exchange tube 520 and the like.
  • the electrolyte tank 510 supplies the electrolyte to the redox flow battery B through the circulation pump 530 in a state in which the positive electrolyte or the negative electrolyte is stored, or so that the electrolyte leaked from the redox flow battery B is stored.
  • an electrolyte storage means having a cylindrical structure and a housing 511 in which the electrolyte is stored, and a concave groove corresponding to the diameter of the heat exchange tube 520 on the outer circumferential surface of the housing 511, the heat exchange tube 520 is formed in a spiral shape. ) Includes an installation line 512 and the like to be fitted.
  • the housing 511 includes a supply pipe 513 through which the electrolyte is supplied to the redox flow battery B, and an inlet pipe 514 through which the electrolyte flows from the heat exchange pipe 520 to the inside.
  • the housing 511 may further include a water level sensor for measuring the level of the electrolyte being stored, and a ventilation fan for discharging internal gas or the like to the outside.
  • the installation line 512 is formed by injection or the like while having a cross section of a groove corresponding to the diameter of the heat exchange tube 520 on the outer circumferential surface of the housing 511, so that the heat exchange tube 520 is formed on the outer circumferential surface of the housing 511 As the exposed part is minimized, the possibility of damage due to external impact can be minimized.
  • the housing 511 heat of the cooling water transferred from the exterior 522 of the heat exchange tube 520 to at least the portion where the installation line 512 is formed or the surface of the installation line 512 is transferred to the housing ( It further includes a thermally conductive coating layer to rapidly conduct and diffuse to 511).
  • the thermally conductive coating layer is formed by applying a thermally conductive coating material to a portion of the housing 511 where the installation line 512 is formed or the surface of the installation line 512.
  • the thermally conductive coating material is added and mixed with 30 to 40 parts by weight of a thermally conductive filler to 100 parts by weight of the polymer.
  • the polymer is selected from the group consisting of a silicone resin, an epoxy resin, an acrylic resin, a mixture thereof, and a copolymer thereof.
  • the thermally conductive filler includes a first filler having a first average particle diameter, a second filler having a second average particle diameter, and a third filler having a third average particle diameter, and the first average particle diameter value is 10 to 30 ⁇ m, and the remaining average It is greater than the particle diameter values, and the value obtained by dividing the second average particle diameter value by the first average particle diameter value is 0.17 to 0.26, and the value obtained by dividing the third average particle diameter value by the first average particle diameter value is 0.09 to 0.11, and the first filler ,
  • the volume resistance of the second filler and the third filler is 10 4 ⁇ cm or more, and the first filler, the second filler, and the third filler have an average value of short diameter/long diameter of 0.6 to 0.8, and the sum of the mass of the second filler/
  • the percentage of the sum of the mass of the first filler is 11 to 16, or the percentage of the sum of the mass of the third filler / the mass of the first filler is 4.2 to
  • the thermally conductive coating material includes 100 parts by mass of at least one type of polymer, 1.5 parts by mass or less of expanded graphite powder, a viscosity at 25°C of 3000 mPa/s or more, and a temperature range of 15°C or more and 100°C or less under atmospheric pressure. 10 parts by mass or more and 15 parts by mass or less of a liquid phosphoric acid ester, 50 parts by mass or more and 90 parts by mass or less of alumina having a BET specific surface area of 1 m 2 /g or more, and 100 parts by mass of a flame-retardant thermally conductive inorganic compound excluding the expanded graphite powder and the alumina. It may contain more than one part and not more than 150 parts by mass.
  • the heat of the heat exchange tube 520 can be quickly absorbed on the outer circumferential surface of the electrolyte tank 510, and through this, the electrolyte stored in the electrolyte tank 510 may maintain a constant temperature.
  • the thermal insulation function can be maximized.
  • the heat exchange tube 520 has a double tube structure of an inner tube 521 through which an electrolyte flows in and an exterior 522 through which cooling water is circulated, and is configured on the outer circumferential surface of the electrolyte tank 510 and is discharged from the redox flow battery B.
  • the inner tube 521 has one end connected to the circulation pump 530 and the other end is the electrolyte tank It is connected to the inlet pipe 513 of the 510, and the outer end 522 is connected to the connection pipe of the heat exchanger 540 at one end and the other end, respectively.
  • the heat exchange tube 520 may have a Teflon material excellent in thermal conductivity, acid resistance, and flexibility, and more preferably, Teflon may be coated on a double tube made of a flexible synthetic resin material.
  • the heat exchanger 540 is a cooling water providing means for circulating the cooling water in the exterior 522 of the heat exchange tube 520, and is configured with a known cooling cycle including a chiller, and the heat exchange tube 520 functions as an evaporator. Can have.
  • the electrolyte flowing out of the redox flow battery B is moved through the inner tube 521 of the heat exchange tube 520 before flowing into the electrolyte tank 510 to surround the inner tube 521.
  • Heat exchange by the cooling water circulating in the exterior 522 increases an area and time for heat exchange with the cooling water, thereby improving heat exchange efficiency.
  • the manufacturing operation of the electrolyte tank 510 is simplified and the operation of manufacturing the electrolyte tank 510 is simplified and according to the configuration of the heat exchange device.
  • the problem of place constraints can be minimized.
  • the electrolyte stored in the electrolyte tank 510 is supplied to the redox flow battery B by the circulation pump 530 to collect positive and negative charges, and then the circulation pump 530 from the redox flow battery B.
  • the electrolyte is discharged by
  • the electrolyte discharged from the redox flow battery (B) flows into the electrolyte tank 510, at this time, it is moved to the inner tube 521 of the heat exchange tube 520 configured in a spiral shape on the outer circumferential surface of the electrolyte tank 510 Heat exchange is performed while being circulated by the cooling water circulated in the outer circumferential surface 522 surrounding the outer circumferential surface of the inner tube 521.
  • the heat exchange tube 520 of the double tube structure is formed in a spiral shape on the outer circumferential surface of the electrolyte tank 510, and the electrolyte is moved to the inner tube 521 and the cooling water is circulated to the outer circumferential surface 522.
  • the electrolyte flowing out of the dox flow battery B is heat-exchanged by the heat exchange tube 520 and then introduced into the electrolyte tank 510, thereby minimizing location restrictions and preventing electrolyte contamination due to outflow of cooling water.
  • the redox flow battery system according to a preferred embodiment of the present invention, a redox flow battery (B), a positive electrode electrolyte or a negative electrode supplied to the redox flow battery (B)
  • the electrolyte tank 510 in which the electrolyte is stored and the double tube structure of the inner tube 521 and the exterior 522 is configured in a spiral shape on the outer circumferential surface of the electrolyte tank 510, and the inner tube 521 has a level by a circulation pump 530.
  • the electrolyte flowing out of the dox flow battery (B) flows in, and the cooling water cooled from the heat exchanger 540 is circulated to the exterior 522 so that the electrolyte is heat-exchanged by the cooling water and then supplied to the electrolyte tank 510. It includes a heat exchange tube 520 and the like to provide a warming function to the 510.
  • the redox flow battery (B) is configured at both ends of the stack (S) and the stack (S) in which a plurality of cell frames 400 are continuously arranged to enable discharge according to the flow of the electrolyte, and the stack (S) from the outside.
  • a pair of end plates (P) and in the state of being positioned on the end plate (P) it is configured to be electrically connected to each of the positive and negative terminals of the plurality of cell frames 400 of the stack S. It is configured on the outer surface of the electrode plate (E) and the end plate (P) that collects the entire charge of the cell frames 400 that are discharged according to the flow to strengthen the binding between the end plate (P) and the stack (S). Includes a bond strengthening channel (unsigned).
  • an outer frame 100 having a rectangular panel shape with a largely opened center and an inner frame 200 having a rectangular frame shape constitute the flow cell 300, and the flow cell ( 300), the inner frame 200 covers the rear edge of the bipolar plate BP on the rear surface of the outer frame 100 while the front edge of the bipolar plate BP is seated on the rear opening of the outer frame 100 While being interlocked, the cell frame 400 is assembled.
  • the cell frame 400 is assembled into a stack (S) while a plurality of cell frames 400 are interlocked with the front of the cell frame 400 at the rear end to the rear surface of the cell frame 400 at the front end.
  • the outer frame 100 is a frame that is interlocked with the inner frame 200 to constitute the flow cell 300 and includes a plate 102 having a rectangular panel shape in which an opening 101 is formed in the center.
  • the outer frame 100 is formed around the convex sealing line 103 protruding from the front edge of the plate 102 and the front opening 101 of the plate 102 so that the rear surface of the inner frame 200 is seated.
  • the convex anode inflow channel 109 is formed to protrude from the electrolyte inflow hole 105 to the opening 101 to provide an anode flow path, and is formed protruding from the front anode electrolyte outflow hole 105 of the plate 102 to the opening 101.
  • the convex cathode outlet channel 112 protrudes from the front cathode electrolyte outlet hole 108 of 102 to the opening 101 to provide a cathode flow path, and the opening 101 along the inner frame seating surface 104 of the plate 102.
  • the convex flow path chamber 113 protruding around, and the front anode inlet gate 114 formed in the convex flow channel chamber 113 so that the convex flow channel chamber 113 of the plate 102 and the convex anode inflow channel 111 communicate with each other.
  • the outer frame 100 is formed around the concave sealing line 118 protruding from the rear edge of the plate 102 and the rear opening 101 of the plate 102 to the front edge of the bipolar plate BP. Is formed protruding along the edge of the bipolar seating surface 119 and the bipolar seating surface 119 so that the concave outer coupling line 203 of the inner frame 200 covers the rear edge of the bipolar plate BP.
  • a concave cathode outlet channel 125 protruding from the hole 108 to the opening 101 to provide a cathode flow path
  • the outer frame 100 is between the front negative electrode inlet gate 116 and the rear negative electrode inlet gate 129 of the plate 102 so that the negative electrolyte solution moves from the rear surface of the plate 102 toward the front, and the plate 102 It further includes a catholyte transfer hole 131 formed through each of the front cathode outflow gate 117 and the rear cathode outflow gate 130.
  • the inner frame 200 is interlocked with the outer frame 100 to constitute the flow cell 300, and the front is interlocked while covering the bipolar plate BP to the rear of the outer frame 100, It includes a cover 201 having a square frame shape.
  • the inner frame 200 is formed on the inner periphery of the front edge of the cover 201 and protrudes from the front edge of the cover 201 and the contact surface 202 that is in close contact with the rear edge of the bipolar plate BP.
  • a concave outer coupling line 203 interlockingly coupled to the convex inner coupling line 120 of the outer frame 100 and a concave front outer coupling line 203 of the cover 201, respectively, and formed on the rear anode inlet gate ( 127) and the rear anode outlet gate 128 in an open structure so that the anode electrolyte flows into the bottom of the concave flow channel chamber 126 on the rear of the plate 102 and contacts the rear of the bipolar plate BP.
  • the anolyte inflow guide 204 and the anolyte outflow guide 205 and the front concave outer coupling line 203 of the cover 201 are formed to flow out to the top of the flow channel chamber 126, respectively, and the cathode inflow gates ( 129 and the rear cathode discharge gate 130 in a closed structure so that the cathode electrolyte does not flow into the concave flow channel chamber 126 on the back of the plate 102, but through the catholyte transfer hole 131, the rear cathode inlet gate ( It is moved from 129 to the front cathode inlet gate 116 and flows into the lower portion of the convex flow path chamber 113 in front of the plate 102 and comes into contact with the front of the bipolar plate BP, and then goes to the upper portion of the convex flow channel chamber 113. It includes a catholyte inflow guide 206 and a catholyte outflow guide 207 that move from the front cathode outflow gate
  • the inner frame 200 corresponds to the rear surface of the cover 201 and is interlocked with the rear surface of the plate 102, and the outer that is seated on the inner frame seating surface 104 of the rear plate outer frame 100 It is formed around the frame seating surface 208 and the outer frame seating surface 208 and allows the membrane (M) to be seated so that the anode electrolyte reaction chamber and the cathode electrolyte reaction chamber are secured between the bipolar plates (BP) at the front and rear ends.
  • the membrane (M) membrane
  • the membrane seating surface 209 corresponding to the rear surface of the anolyte inflow guide 204 and the anolyte outflow guide 205, respectively, in the front anode inlet gate 114 and the front anode outflow gate 115 of the rear plate 102.
  • the anode electrolyte with the front of the rear plate 102 does not flow into the convex flow channel chamber 113 of the front plate 102, but flows into the lower portion of the concave flow channel chamber 126 of the front plate 102 and the bipolar plate ( After contacting the rear surface of the BP), they correspond to the anode gate closing piece 210 and the rear surface of the catholyte inflow guide 206 and the catholyte outflow guide 207 to flow out to the top of the concave flow channel chamber 126, respectively.
  • the cathode electrolyte with the front of the rear plate 102 flows into the concave flow channel chamber 126 of the front plate 102 And flows into the lower portion of the convex flow path chamber 113 of the shear plate 102 through the catholyte transfer hole 131 and flows out to the upper portion of the convex flow channel chamber 113 after being brought into contact with the front of the bipolar plate BP.
  • It includes a cathode gate closing piece 211 and the like.
  • the front edge of the bipolar plate BP is seated on the rear bipolar seating surface 119 of the outer frame 100.
  • the convex inner coupling line 120 of the outer frame 100 is inserted into the concave outer coupling line 203 while the front contact surface 202 of the inner frame 200 is in close contact with the rear edge of the bipolar plate BP. Then, it is interlocked by being pressurized, and at this time, the anolyte inflow guide 204 of the inner frame 200 and the anolyte in the rear anode inlet gate 127 and the rear anode outflow gate 128 of the flow cell 300
  • the outlet guide 205 is located in an open structure, and the rear cathode inlet gate 129 and the rear cathode outlet gate 130 of the flow cell 300 have a catholyte inflow guide 206 and a cathode of the inner frame 200.
  • the liquid outflow guide 207 is located in a closed structure.
  • the convex sealing line 103 of the rear flow cell 300-2 is fitted into the concave sealing line 118 of the front flow cell 300-1, and at this time, the rear flow cell 300-2
  • the rear surface of the inner frame 200 of the front flow cell 300-1 is seated on the inner frame seating surface 104 of the, and the electrolyte inflow hole and the electrolyte solution of the front flow cell 300-1 and the rear flow cell 300-2
  • Each outlet hole has a structure that communicates with each other.
  • the convex anode inflow channel 111 and the convex anode outflow channel 112 of the rear flow cell 300-2 are the concave anode inflow channel 122 and the concave anode outflow channel of the front flow cell 300-1. (123), the convex cathode inflow channel 111 and the convex cathode outflow channel 112 of the rear flow cell 300-2 are connected to the concave cathode inflow channel 124 of the front flow cell 300-1. Inserted into the concave cathode outlet channel 125, at this time, the front anode inlet gate 114 and the front anode outlet gate 115 of the rear flow cell 300-2 are the anode gates of the front flow cell 300-1. The closing piece 210 is in close contact with the cathode gate closing piece 211 of the front cathode inlet gate 116 and the front cathode outlet gate 117 of the rear flow cell 300-2. This becomes close.
  • the membrane (M) is positioned on the rear membrane seating surface 209 of the flow cell 300 in the front end, and the flow cell in the front end ( The rear surface of the bipolar plate BP located at 300) and the front surface of the bipolar plate BP located at the flow cell 300 at the rear and one side of the membrane M and the rear surface of the membrane M have an electrolyte diffusion felt ( T) is constructed.
  • the bipolar plate (BP) is mounted on a plurality of flow cells 300 and separated through a membrane (M) between the flow cells 300, and when the positive electrolyte and the negative electrolyte are in contact with each other, the membrane It is possible to discharge while having the charge of the anode and the cathode through the oxidation and reduction reactions generated in the reaction chamber between the (M) and the flow path chambers, since it is a known configuration, a detailed description will be omitted.
  • the electrolyte diffusion felt (T) is configured in a state in contact with the front and rear surfaces of the bipolar plate (BP), so that the electrolyte flowing along the bipolar plate (BP) is uniform over the entire surface of the bipolar plate (BP).
  • the contact is made so that the efficiency of oxidation and reduction reactions occurring in the space between the bipolar plate BP and the membrane M is improved, and at the same time, the electric charge generated through the oxidation and reduction reactions is easily collected.
  • the interlocking coupling is made through insertion and pressing of the concave component and the convex component of the cell frame 400, at this time, the protruding height of the convex component is a concave component It is preferable to protrude higher than the protruding height of about 1/10 to 2/10, and thus, when the convex component is inserted into the concave component and pressed, the end fitted to the bottom of the concave groove is bent and deformed. It is better to be interlocked without falling out of the width.
  • the protrusion height of the convex element is shorter than the above range, the deformation area of the end is too small, so that the interlocking coupling is easily released and sealing is not performed. If the protrusion height is longer than the above range, the deformation area of the end is rather Because it is too wide, the width of the groove of the concave component becomes wide, so that interlocking coupling cannot be achieved.
  • the cell frame 400 of the present invention is preferably made of a synthetic resin material such as PP, which is easily deformed when pressed for interlocking coupling.
  • the positive electrolyte is circulated in the positive electrolyte inflow hole 105 in the lower front right corner of the frontmost flow cell 300 and the positive electrolyte inflow hole 106 in the upper left corner of the rearmost flow cell 300.
  • the anode circulation pump and the anolyte tank are connected, and the cathode electrolyte inflow hole 107 in the lower left front corner of the flow cell 300 at the front end and the cathode electrolyte leakage hole in the upper right corner of the rear rear end of the flow cell 300 ( 108) is connected to a catholyte circulation pump and a catholyte tank to circulate the catholyte.
  • the anode circulation pump flows into the anode electrolyte inlet hole 105 in the lower right front of the flow cell 300 at the front end from the anolyte tank, and at this time, the anode electrolyte flows into a continuous flow cell ( At the same time, it flows into the space between the anode inflow channels communicated with the anode electrolyte inflow holes 105 of the 300).
  • the anode electrolyte is transferred from the concave anode inlet channel 122 located at the rear of each front flow cell 300-1 to the bottom of the concave channel chamber 126 via the rear anode inlet gate 127.
  • the bipolar plate (BP) After flowing in and contacting the rear surface of the bipolar plate (BP), it flows out to the upper portion of the concave flow channel chamber 126 and passes through the rear anode discharge gate 128 and the concave anode discharge channel 123, 106) at the same time.
  • the cathode electrolyte is introduced into the cathode electrolyte inlet hole 107 in the lower left front of the flow cell 300 at the front end from the catholyte tank by the cathode circulation pump, and at this time, the cathode electrolyte is a continuous flow cell ( 300) simultaneously flows into the space between the cathode inflow channels communicated with the cathode electrolyte inflow holes 107.
  • the cathode electrolyte is flow cell through the rear cathode inlet gate 129 and the catholyte transfer hole 131 from the concave cathode inlet channel 124 located at the rear of each front flow cell 300-1.
  • the cathode electrolyte After flowing into the lower portion of the convex flow channel chamber 113 located in front of 300 and contacting the front of the bipolar plate BP, flows out to the upper portion of the convex flow channel chamber 113 and Through the catholyte transfer hole 131, it flows out simultaneously to the concave cathode outlet channel 125 and the cathode electrolyte outlet 108 located on the rear surface of the flow cell 300.
  • the stack (S) is a battery body in which a plurality of cell frames 100 are arranged in a stack structure to enable the discharge of the electrolyte through oxidation and reduction reactions according to the flow of the electrolyte, and a bipolar structure is provided on the rear surface of the outer frame 100.
  • the edge of the plate BP is seated, and the inner frame 200 is fitted into the outer frame 100 while being in close contact with the bipolar plate BP, and then interlocked through pressurization to be assembled into the flow cell 300, and the rear end
  • the front of the outer frame 100 of the flow cell 300-2 is in close contact with the rear surface of the outer frame 100 of the front flow cell 300-1, the convex element is inserted into the concave element and is then pressed to interlock.
  • the membrane (M) is positioned on the rear surface of the front flow cell (300-1), and the rear surface of the bipolar plate (BP) and the membrane (M) are located on the front flow cell (300-1).
  • the electrolyte tank 510, the heat exchange tube 520, the heat exchanger 540 and the circulation pump 530 are the same as the electrolyte heat exchange structure, so detailed Description will be omitted.
  • the positive electrolyte is circulated in the positive electrolyte inflow hole 105 in the lower front right corner of the frontmost flow cell 300 and the positive electrolyte inflow hole 106 in the upper left corner of the rearmost flow cell 300.
  • the anode circulation pump and the anolyte tank are connected, and the cathode electrolyte inflow hole 107 in the lower left front corner of the flow cell 300 at the front end and the cathode electrolyte leakage hole in the upper right corner of the rear rear end of the flow cell 300 ( 108) is connected to a catholyte circulation pump and a catholyte tank to circulate the catholyte.
  • a heat exchange tube 520 having a double tube structure is formed on the outer circumferential surfaces of the anolyte tank and the catholyte tank, respectively.
  • the anode circulation pump flows into the anode electrolyte inlet hole 105 in the lower right front of the flow cell 300 at the front end from the anolyte tank, and at this time, the anode electrolyte flows into a continuous flow cell ( At the same time, it flows into the space between the anode inflow channels communicated with the anode electrolyte inflow holes 105 of the 300).
  • the anode electrolyte is transferred from the concave anode inlet channel 122 located at the rear of each front flow cell 300-1 to the bottom of the concave channel chamber 126 via the rear anode inlet gate 127.
  • the bipolar plate (BP) After flowing in and contacting the rear surface of the bipolar plate (BP), it flows out to the upper portion of the concave flow channel chamber 126 and passes through the rear anode discharge gate 128 and the concave anode discharge channel 123, 106) at the same time.
  • the cathode electrolyte is introduced into the cathode electrolyte inlet hole 107 in the lower left front of the flow cell 300 at the front end from the catholyte tank by the cathode circulation pump, and at this time, the cathode electrolyte is a continuous flow cell ( 300) simultaneously flows into the space between the cathode inflow channels communicated with the cathode electrolyte inflow holes 107.
  • the cathode electrolyte is flow cell through the rear cathode inlet gate 129 and the catholyte transfer hole 131 from the concave cathode inlet channel 124 located at the rear of each front flow cell 300-1.
  • the cathode electrolyte After flowing into the lower portion of the convex flow channel chamber 113 located in front of 300 and contacting the front of the bipolar plate BP, flows out to the upper portion of the convex flow channel chamber 113 and Through the catholyte transfer hole 131, it flows out simultaneously to the concave cathode outlet channel 125 and the cathode electrolyte outlet 108 located on the rear surface of the flow cell 300.
  • the positive electrolyte and the negative electrolyte flow through the space between the bipolar plate BP and the membrane M, respectively, and at this time, the electrolyte is oxidized and reduced with the membrane M interposed therebetween, so that each bipolar plate BP is On one side, positive and negative charges are collected.
  • the electric charges collected on the bipolar plate BP are all collected by the electrode plate E and then supplied to a conversion device such as an inverter, converted into DC/AC, and then supplied to each load.
  • the electrolytes discharged as described above move along the heat exchange tube 520 and are heat-exchanged by the cooling water and then flow into the anolyte tank and the catholyte tank.
  • the heat exchange tube 520 of the double tube structure is formed in a spiral shape on the outer circumferential surface of the electrolyte tank 510, and the electrolyte is moved to the inner tube 521 and the cooling water is circulated to the outer circumferential surface 522.
  • the electrolyte flowing out of the dox flow battery B is heat-exchanged by the heat exchange tube 520 and then introduced into the electrolyte tank 510, thereby minimizing location restrictions and preventing electrolyte contamination due to outflow of cooling water.
  • a bipolar plate (BP) is positioned on the rear surface of one outer frame 100, and the inner frame 200 is interlocked to the rear surface of the outer frame 100 while covering the bipolar plate (BP). 400) and the front of the other cell frame 400 is interlocked to the rear surface of the cell frame 400, so that a stack S capable of sealing without a sealing member or an adhesive member may be assembled.
  • one cell frame 400 is composed of an outer frame 100 and an inner frame 200 that are coupled in a face-to-face state, it is possible to have a thinner thickness compared to the conventional stack (S) having the same capacity. ) Can be made thinner.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention concerne une structure d'échange de chaleur à électrolyte comprenant : un réservoir d'électrolyte pour stocker l'électrolyte fourni à une batterie à flux redox; et des tuyaux d'échange de chaleur ayant une structure à double tuyau de tuyaux interne et externe et disposés en hélice sur la surface externe du réservoir d'électrolyte, l'électrolyte déchargé à partir de la batterie à flux redox s'écoulant dans le tuyau interne et l'eau qui a été refroidie par un échangeur de chaleur circulant dans le tuyau externe pour soumettre l'électrolyte à un échange de chaleur avec l'eau refroidie et ensuite être alimentée dans le réservoir d'électrolyte.
PCT/KR2020/002550 2019-11-05 2020-02-21 Structure échangeuse de chaleur à électrolyte et système à flux redox l'utilisant WO2021091025A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2019-0140488 2019-11-05
KR1020190140488A KR102308407B1 (ko) 2019-11-05 2019-11-05 셀프레임 구조체 및 이를 이용한 레독스흐름전지
KR10-2020-0019769 2020-02-18
KR1020200019769A KR102308408B1 (ko) 2020-02-18 2020-02-18 전해액 열교환 구조체 및 이를 이용한 레독스흐름전지 시스템

Publications (1)

Publication Number Publication Date
WO2021091025A1 true WO2021091025A1 (fr) 2021-05-14

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110045332A1 (en) * 2008-07-07 2011-02-24 Enervault Corporation Redox Flow Battery System for Distributed Energy Storage
US20130071714A1 (en) * 2011-09-21 2013-03-21 Pratt & Whitney Rocketdyne, Inc. Flow battery stack with an integrated heat exchanger
KR20150062818A (ko) * 2013-11-29 2015-06-08 롯데케미칼 주식회사 전해액 온도 조절부를 구비한 레독스 흐름 전지
KR20160078566A (ko) * 2014-12-24 2016-07-05 오씨아이 주식회사 냉각 기능을 구비하는 전해액 분배블럭 및 이를 포함하는 스택 분할형 레독스 흐름 전지
KR20170028124A (ko) * 2015-09-03 2017-03-13 (주) 퓨전정보기술 열교환 성능이 향상된 레독스 흐름 전지

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110045332A1 (en) * 2008-07-07 2011-02-24 Enervault Corporation Redox Flow Battery System for Distributed Energy Storage
US20130071714A1 (en) * 2011-09-21 2013-03-21 Pratt & Whitney Rocketdyne, Inc. Flow battery stack with an integrated heat exchanger
KR20150062818A (ko) * 2013-11-29 2015-06-08 롯데케미칼 주식회사 전해액 온도 조절부를 구비한 레독스 흐름 전지
KR20160078566A (ko) * 2014-12-24 2016-07-05 오씨아이 주식회사 냉각 기능을 구비하는 전해액 분배블럭 및 이를 포함하는 스택 분할형 레독스 흐름 전지
KR20170028124A (ko) * 2015-09-03 2017-03-13 (주) 퓨전정보기술 열교환 성능이 향상된 레독스 흐름 전지

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