WO2015174282A1 - Batterie à flux redox - Google Patents

Batterie à flux redox Download PDF

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Publication number
WO2015174282A1
WO2015174282A1 PCT/JP2015/062914 JP2015062914W WO2015174282A1 WO 2015174282 A1 WO2015174282 A1 WO 2015174282A1 JP 2015062914 W JP2015062914 W JP 2015062914W WO 2015174282 A1 WO2015174282 A1 WO 2015174282A1
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WIPO (PCT)
Prior art keywords
liquid
storage container
tank
pressure
gas phase
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PCT/JP2015/062914
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English (en)
Japanese (ja)
Inventor
淳夫 池内
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住友電気工業株式会社
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Publication of WO2015174282A1 publication Critical patent/WO2015174282A1/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
    • 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
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • 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 a redox flow battery that performs charging and discharging by circulating an electrolytic solution through a battery unit.
  • the RF battery ⁇ is typically connected between a power generation unit (for example, a solar power generation device, a wind power generation device, other general power plants, etc.) and a load (such as a customer) via an AC / DC converter.
  • a power generation unit for example, a solar power generation device, a wind power generation device, other general power plants, etc.
  • load such as a customer
  • the RF battery ⁇ includes one or more battery units 100.
  • the battery unit 100 includes a positive electrode cell part 102 containing a positive electrode 104, a negative electrode cell part 103 containing a negative electrode 105, and a diaphragm 101 that separates both the cell parts 102 and 103 and transmits ions.
  • a positive electrode electrolyte tank 106 that stores a positive electrode electrolyte is connected to the positive electrode cell unit 102 via pipes 108 and 110.
  • a negative electrode electrolyte tank 107 for storing a negative electrode electrolyte is connected to the negative electrode cell unit 103 via pipes 109 and 111.
  • the pipes 108 and 109 are provided with pumps 112 and 113 for circulating the electrolytes, respectively.
  • the battery unit 100 is connected to the positive electrode cell section 102 (positive electrode 104) and the negative electrode cell section 103 (negative electrode 105) by the pipes 108 to 111 and the pumps 112 and 113, respectively.
  • the negative electrode electrolyte solution is circulated and charged and charged / discharged as the valence of metal ions (vanadium ions in the example shown in the drawing) change as the active material in the electrolyte solution at both electrodes.
  • the gas phase in the electrolyte tanks 106 and 107 expands or contracts due to temperature changes in the installation environment, heat generation during charging and discharging, and the like.
  • the electrolyte tanks 106 and 107 may burst.
  • the electrolyte tanks 106 and 107 may be dented and damaged.
  • it has been proposed to provide a redox flow battery with a pressure adjustment mechanism that adjusts the inside of the electrolyte tanks 106 and 107 to near atmospheric pressure see, for example, Patent Document 1).
  • Patent Document 1 discloses a pressure adjustment mechanism including a first atmospheric pressure holding container and a second atmospheric pressure holding container in which a pressure adjusting liquid is stored (see FIG. 1 of Patent Document 1).
  • the gas phase in the first atmospheric pressure holding container is communicated with the gas phase in the liquid storage tank (electrolyte tank) by the first communication means, and the liquid phase in the first atmospheric pressure holding container and the second atmospheric pressure holding container are communicated.
  • the liquid phase is communicated with the second communicating means.
  • the gas phase in the second atmospheric pressure holding container is open to the atmosphere.
  • the pressure in the electrolyte tank drops to near atmospheric pressure.
  • the electrolyte tank has a negative pressure
  • the liquid level of the first atmospheric pressure holding container is raised and the liquid level of the second atmospheric pressure holding container is lowered as shown in FIG.
  • the internal pressure rises to near atmospheric pressure.
  • Patent Document 1 it is possible to prevent the atmosphere from being sucked into the electrolyte tank when the inside of the electrolyte tank becomes negative pressure, and to prevent the electrolyte from being deteriorated by the atmosphere. Can be suppressed.
  • the reason why the atmosphere can be prevented from being sucked into the electrolytic solution tank is that the pressure adjusting liquid is filled in the second communication means that connects the second atmospheric pressure holding container and the first atmospheric pressure holding container.
  • Patent Document 1 since the gas phase in the second atmospheric pressure holding container is open to the atmosphere, the pressure adjusting liquid in the container evaporates. For this reason, it is necessary to monitor the amount of the pressure-regulating liquid at a considerable frequency and replenish it appropriately. Since the labor of maintenance during operation of such a redox flow battery is complicated, it is desired to reduce the labor.
  • the present invention has been made in view of the above circumstances, and one object of the present invention is to provide a redox flow battery that requires less maintenance during operation.
  • the redox flow battery includes a battery unit, an electrolyte tank for a positive electrode, an electrolyte tank for a negative electrode, and a pressure adjustment mechanism.
  • the battery unit has a positive electrode, a negative electrode, and a diaphragm.
  • the positive electrode electrolyte tank stores the positive electrode electrolyte supplied to the battery unit.
  • the negative electrode electrolyte solution tank stores the negative electrode electrolyte supplied to the battery unit.
  • the pressure adjustment mechanism is attached to at least one of the positive electrode electrolyte tank and the negative electrode electrolyte tank, and adjusts the pressure of the gas phase in the electrolyte tank.
  • the pressure adjusting mechanism is a storage container that stores the pressure adjusting liquid, a first exhaust pipe that extends from the gas phase in the electrolyte tank, passes through the gas phase in the storage container, and opens into the liquid phase in the storage container, And a water seal valve provided with a second exhaust pipe having one end opened to the gas phase in the storage container and the other end opened to the atmosphere, and a liquid supply mechanism for replenishing the pressure adjusting liquid in the storage container.
  • the above redox flow battery requires less maintenance.
  • FIG. 2 is a schematic configuration diagram of a pressure adjustment mechanism shown in Embodiment 1.
  • FIG. 6 is a schematic configuration diagram of a pressure adjustment mechanism shown in Embodiment 2.
  • FIG. It is a schematic block diagram of the pressure adjustment mechanism shown in Embodiment 3.
  • a redox flow battery includes a battery unit, an electrolyte tank for a positive electrode, an electrolyte tank for a negative electrode, and a pressure adjustment mechanism.
  • the battery unit has a positive electrode, a negative electrode, and a diaphragm.
  • the positive electrode electrolyte tank stores the positive electrode electrolyte supplied to the battery unit.
  • the negative electrode electrolyte solution tank stores the negative electrode electrolyte supplied to the battery unit.
  • the pressure adjustment mechanism is attached to at least one of the positive electrode electrolyte tank and the negative electrode electrolyte tank, and adjusts the pressure of the gas phase in the electrolyte tank.
  • the pressure adjusting mechanism is a storage container that stores the pressure adjusting liquid, a first exhaust pipe that extends from the gas phase in the electrolyte tank, passes through the gas phase in the storage container, and opens into the liquid phase in the storage container, And a water seal valve provided with a second exhaust pipe having one end opened to the gas phase in the storage container and the other end opened to the atmosphere, and a liquid supply mechanism for replenishing the pressure adjusting liquid in the storage container.
  • the water seal valve provided in the pressure adjusting mechanism of the redox flow battery can release the gas in the electrolyte tank to the atmosphere when the inside of the electrolyte tank becomes positive pressure.
  • the movement state of the gas in the electrolytic solution tank will be specifically described.
  • the gas in the electrolytic solution tank is discharged to the liquid phase in the storage container through the first exhaust pipe, and moves to the gas phase in the storage container. Since the gas in the storage container is released to the atmosphere through the second exhaust pipe, as a result, the gas in the electrolytic solution tank is released to the outside, and the electrolytic solution tank is prevented from bursting.
  • the water seal valve also contributes to increasing the pressure of the electrolyte tank when the inside of the electrolyte tank becomes negative pressure. This is because when the electrolyte tank becomes negative pressure, the pressure adjusting liquid is sucked into the first exhaust pipe, and the volume of the gas phase in the first exhaust pipe decreases accordingly.
  • the redox flow battery provided with the pressure adjusting mechanism is a redox flow battery that requires less maintenance. This is because a liquid supply mechanism for replenishing the pressure adjusting liquid to the storage container of the water seal valve is provided.
  • the liquid supply mechanism may include a replacement fluid tank, a first pipe, and a second pipe.
  • the replacement fluid tank is a member that stores a replenishing pressure adjustment fluid.
  • the first pipe extends from the gas phase in the replacement tank, passes through the gas phase in the storage container, opens near the liquid level of the liquid phase in the storage container, and the opening is opened and closed by the liquid level in the storage container. It is a member.
  • the second pipe is a member that communicates with the liquid phase in the replacement liquid tank and the gas phase in the storage container, and supplies the pressure adjusting liquid from the replacement liquid tank to the storage container when the opening of the first pipe is opened. .
  • the pressure adjusting liquid in the storage container of the water seal valve decreases, the pressure adjusting liquid can be automatically replenished from the replacement liquid tank to the storage container.
  • the trouble of monitoring and replenishing the pressure adjusting liquid can be greatly reduced.
  • it can suppress that the pressure regulation liquid in a storage container reduces too much, and the gaseous phase in an electrolyte solution tank communicates with air
  • the liquid supply mechanism may include a replacement fluid tank and a third pipe.
  • the replacement fluid tank is a member for storing a replenishing pressure adjusting solution, and its gas phase is sealed.
  • the third pipe extends from the liquid phase in the replacement tank, passes through the gas phase in the storage container, opens near the liquid level of the liquid phase in the storage container, and the opening is opened and closed by the liquid level in the storage container. It is a member.
  • the water seal valve further includes a wave-shielding tube that houses a portion on the opening side of the first exhaust pipe and is open at both ends. Can do.
  • the opening on the lower side and the opening on the upper side of the wave preventing cylinder are opened at a position lower than the opening of the first exhaust pipe and a position higher than the liquid level, respectively.
  • the upper opening of the wave-breaking cylinder is opened at a position higher than the liquid level, bubbles that have entered the liquid phase in the wave-breaking cylinder can be repelled by the liquid level inside the wave-breaking cylinder. Since the liquid level inside the wave breaker is separated from the liquid level outside the wave breaker by the wave breaker, the liquid surface outside the wave breaker can be suppressed. If the liquid level in the storage container can be suppressed, the opening of the pipe that is opened and closed by the liquid level (the first pipe in the configuration [2] and the third pipe in the configuration [3]) is frequently opened and closed. Can be suppressed. As a result, the supply of the pressure adjusting liquid from the replacement fluid tank to the storage container can be made an appropriate amount.
  • the liquid supply mechanism includes a first water generating device that condenses water vapor contained in the gas phase in the storage container and returns it to the liquid phase in the storage container. be able to.
  • Replenishment of the pressure adjustment liquid using water vapor contained in the gas phase in the storage container can significantly reduce the frequency of replenishment of the pressure adjustment liquid by human hands.
  • the liquid supply mechanism may include a second water generation device that condenses water vapor contained in the atmosphere and introduces it into the liquid phase in the storage container. .
  • the water seal valve may further include an overflow pipe that opens to the side portion or bottom portion of the storage container and discharges the regulated liquid exceeding a predetermined amount to the outside. it can.
  • the vapor phase in the storage container contains a large amount of water vapor
  • the water vapor in the storage container condenses and the pressure adjustment liquid in the storage container increases.
  • the pressure adjustment mechanism including the overflow pipe the pressure-regulating liquid stored in the storage container can be limited to a predetermined amount or less, so that the occurrence of the above problem can be suppressed.
  • the redox flow battery of the present embodiment may include a form provided with a breathing bag attached to at least one of a positive electrode electrolyte tank and a negative electrode electrolyte tank.
  • the redox flow battery provided with a breathing bag, it is possible to effectively prevent the electrolyte tank from being recessed when the inside of the electrolyte tank becomes negative pressure.
  • a redox flow battery (hereinafter referred to as an RF battery ⁇ ) according to this embodiment will be described with reference to the drawings.
  • this invention is not necessarily limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.
  • the RF battery ⁇ shown in FIG. 1 has the same configuration as the RF battery ⁇ described with reference to the operation principle diagram of FIG. 6 except that the gas phase communication pipe 9 and the pressure adjustment mechanism 1 are provided. Therefore, in the RF battery ⁇ of FIG. 1, the same components as those of the RF battery ⁇ of FIG.
  • the RF battery ⁇ shown in FIG. 1 has a battery unit 100 and a circulation mechanism (electrolyte tanks 106 and 107, pipes 108 to 111, a pump 112 for supplying an electrolytic solution to the battery unit 100. 113).
  • the arrangement of each member in the RF battery ⁇ shown in FIG. 1 is close to the actual arrangement.
  • the positions of the electrolyte tanks 106 and 107 in FIG. 1 are arranged at a position lower than the battery unit 100.
  • the RF battery ⁇ includes a gas phase communication pipe 9 that communicates the gas phase in the electrolyte tank 106 for the positive electrode and the gas phase in the electrolyte tank 107 for the negative electrode.
  • the gas phase communication pipe 9 can handle the gas phases in the electrolyte tanks 106 and 107 as a unit.
  • a maintenance valve may be provided in the middle of the gas phase communication pipe 9.
  • the RF battery ⁇ includes two pressure adjusting mechanisms 1 attached to the electrolyte tanks 106 and 107, and two breathing bags 3 attached to the electrolyte tanks 106 and 107, respectively.
  • These members 1 and 3 are for adjusting the pressure in the electrolyte tanks 106 and 107, and the pressure adjusting mechanism 1 mainly functions when the pressure in the electrolyte tanks 106 and 107 becomes positive.
  • the breathing bag 3 functions mainly when the inside of the electrolyte tanks 106 and 107 becomes a negative pressure.
  • the pressure adjustment mechanism 1 includes a water seal valve 1A and a liquid supply mechanism 1B as shown in FIG.
  • One pressure adjusting mechanism 1 is provided in each of the electrolyte tanks 106 and 107 so that even if one of them fails, the other functions so that the pressure in the electrolyte tanks 106 and 107 can be adjusted. It is to make it.
  • the water seal valve 1 ⁇ / b> A of the pressure adjustment mechanism 1 includes a storage container 10, a first exhaust pipe 11, and a second exhaust pipe 12.
  • the storage container 10 is a member that stores the pressure adjusting liquid 10L.
  • the first exhaust pipe 11 is a member that extends from the gas phase in the electrolyte tank 106 (107), passes through the gas phase in the storage container 10, and opens into the liquid phase in the storage container 10.
  • the second exhaust pipe 12 is a member having one end opened to the gas phase in the storage container 10 and the other end opened to the atmosphere.
  • the pressure adjusting liquid 10L may be water or an aqueous solution that is inexpensive and easily available.
  • the aqueous solution include dilute sulfuric acid solution.
  • the dilute sulfuric acid solution is preferable because it is difficult to freeze even in a low temperature environment.
  • the storage container 10, the first exhaust pipe 11, and the second exhaust pipe 12 can be made of a resin such as polyvinyl chloride (PVC), for example.
  • PVC polyvinyl chloride
  • the storage container 10 is preferably transparent so that the amount of the pressure adjusting liquid 10L in the storage container 10 can be confirmed from the outside. PVC can respond to such a request.
  • the first exhaust pipe 11 and the second exhaust pipe 12 may be transparent.
  • the internal volume of the storage container 10 is preferably 0.2 liters (200 cm 3 ) or more and 20 liters or less. If it is the storage container 10 which has the internal volume of this range, the function as water seal valve 1A can fully be exhibited, and it can avoid that water seal valve 1A enlarges.
  • the inner diameter of the first exhaust pipe 11 connected to the vapor phase of the electrolyte tank 106 (107) is preferably 1 cm or more and 10 cm or less. If it is the 1st exhaust pipe 11 which has an internal diameter of this range, discharge
  • the inner diameter of the second exhaust pipe 12 is preferably 1 cm or more and 10 cm or less. If it is the 2nd exhaust pipe 12 which has the internal diameter of this range, the gas in the storage container 10 can be rapidly discharged
  • the second exhaust pipe 12 only needs to be configured to open the storage container 10 to the atmosphere, and may be a short pipe that forms an opening in the storage container 10.
  • the water seal valve 1A having the above-described configuration has a function of adjusting the pressure inside the electrolyte tanks 106 and 107 to near atmospheric pressure when the inside of the electrolyte tanks 106 and 107 becomes a positive pressure. Specifically, when the inside of the electrolyte tanks 106 and 107 becomes positive pressure, the gas in the electrolyte tanks 106 and 107 passes through the first exhaust pipe 11 and is discharged to the liquid phase in the storage container 10. (See thick arrow). The gas discharged to the liquid phase becomes bubbles and rises in the liquid phase and moves to the gas phase in the storage container 10. The gas in the storage container 10 is released to the atmosphere through the second exhaust pipe 12 as indicated by the thick arrow.
  • the gas in the electrolyte tanks 106 and 107 is released to the outside by the water seal valve 1A, and the pressure inside the electrolyte tanks 106 and 107 is adjusted to near atmospheric pressure. As a result, rupture of the electrolyte tanks 106 and 107 can be prevented.
  • the water seal valve 1A having the above-described configuration also has a function of bringing the pressure inside the electrolyte tanks 106 and 107 close to atmospheric pressure when the electrolyte tanks 106 and 107 become negative pressure.
  • the pressure adjusting liquid 10L is sucked into the first exhaust pipe 11, and the volume of the gas phase in the first exhaust pipe 11 decreases accordingly.
  • the pressure inside the electrolyte tanks 106 and 107 increases, and the depression of the electrolyte tanks 106 and 107 is suppressed.
  • the gas generated in the electrolyte tanks 106 and 107 may be harmful gas. Therefore, it is preferable to provide a gas removal device in the middle of the first exhaust pipe 11 or in the middle of the second exhaust pipe 12.
  • a gas removal device for example, the one described in JP 2007-31209 A (for example, a filter using copper oxide) can be used.
  • the water seal valve 1 ⁇ / b> A of this example may further include a wave blocking tube 13 (see a broken line) inside the storage container 10.
  • the wave preventing tube 13 is a member that accommodates a portion of the first exhaust pipe 11 on the opening side and suppresses the ripple of the liquid level in the storage container 10 caused by bubbles discharged from the first exhaust pipe 11. Both ends of the wave barrier 13 are open.
  • the opening on the lower side of the wave-breaking tube 13 is opened below the opening of the first exhaust pipe 11, many of the bubbles discharged from the electrolyte tanks 106 and 107 to the first exhaust pipe 11 are formed. It enters the liquid phase in the wave-breaking cylinder 13.
  • the opening on the upper side of the wave preventing tube 13 is opened at a position higher than the liquid level, the bubbles that have entered the liquid phase in the wave preventing tube 13 can be repelled by the liquid level inside the wave preventing tube 13. .
  • the liquid surface inside the wave preventing tube 13 is partitioned from the liquid surface outside the wave preventing tube 13 by the wave preventing tube 13, it is possible to suppress the undulation and foaming of the liquid surface outside the wave preventing tube 13. it can. The effect obtained as a result will be described later.
  • the water seal valve 1A of this example further includes an overflow pipe 14 that opens to the side of the storage container 10.
  • the overflow pipe 14 is a member that restricts the pressure adjusting liquid 10L stored in the storage container 10 to a predetermined amount or less by discharging the pressure adjusting liquid 10L in the storage container 10 exceeding a predetermined amount to the outside.
  • the temperature of the installation environment of the RF battery ⁇ is decreased, water vapor in the storage container 10 is condensed, and the pressure adjusting liquid 10L in the storage container 10 is increased.
  • the pressure adjustment liquid 10L increases, there may be a problem that the pressure value to be adjusted increases or a problem that the pressure adjustment liquid 10L overflows from the storage container 10 and the water seal valve 1A does not function.
  • the overflow pipe 14 is provided as a countermeasure.
  • the amount of the pressure adjusting liquid 10L stored in the storage container 10 is preferably 0.1 liter or more and 10 liters or less.
  • the overflow pipe 14 may be opened at the bottom of the storage container 10. In that case, the overflow pipe 14 connected to the bottom of the storage container 10 is bent so as to extend toward the upper side of the storage container 10 so that the liquid amount of the storage container 10 is maintained constant.
  • the liquid supply mechanism 1 ⁇ / b> B of this example includes a replacement fluid tank 20, a first pipe 21, and a second pipe 22.
  • the replacement fluid tank 20 is a member that stores the pressure adjusting liquid 10L.
  • the first pipe 21 extends from the gas phase in the replacement fluid tank 20, passes through the gas phase in the storage container 10, opens near the liquid level of the liquid phase in the storage container 10, and the opening is opened and closed by the liquid level. It is a member.
  • the second pipe 22 communicates with the liquid phase in the replacement liquid tank 20 and the gas phase in the storage container 10, and when the opening of the first pipe 21 is opened, the pressure adjusting liquid is transferred from the replacement liquid tank 20 to the storage container 10. It is a member that supplies 10L.
  • the opening position of the second pipe 22 is higher than the lower end of the first pipe 21.
  • the replacement fluid tank 20, the first pipe 21, and the second pipe 22 can be made of resin such as PVC.
  • PVC is preferable because it has various resistances and is inexpensive.
  • These members 20, 21, 22 are also preferably transparent so that the state of the pressure adjusting liquid 10L can be confirmed.
  • the internal volume of the replacement fluid tank 20 is preferably 1 liter or more and 100 liters or less. With the replacement fluid tank 20 having an internal volume within this range, the function of replenishing the water sealing valve 1A with the pressure regulating fluid 10L can be sufficiently exhibited.
  • the inner diameter of the first pipe 21 and the inner diameter of the second pipe 22 are preferably 0.5 cm or more and 10 cm or less.
  • the replenisher tank 20 is provided with an inlet for the pressure regulating liquid 10L that can be opened and closed at a position on the upper surface thereof. The inlet of the replacement fluid tank 20 is closed during operation of the RF battery, and the gas phase of the replacement fluid tank 20 is kept in a sealed state. When the replacement fluid tank 20 is not sufficiently sealed and the atmosphere flows into the gas phase of the replacement fluid tank 20, the pressure adjusting liquid 10 L in the replacement fluid tank 20 is supplied to the storage container 10 without limit.
  • the second pipe 22 includes a valve 22b in the middle thereof.
  • the valve 22b is for preventing the pressure adjusting liquid 10L from flowing into the storage container 10 from the replacement liquid tank 20 when the pressure adjusting liquid 10L is replenished into the liquid replacement tank 20. Without the valve 22b, the pressure adjusting liquid 10L replenished in the replacement liquid tank 20 flows into the storage container 10 without limit. During the operation of the RF battery ⁇ , the valve 22b is kept open.
  • the liquid supply mechanism 1B having the above-described configuration, when the amount of the pressure adjusting liquid 10L in the water seal valve 1A decreases and the liquid level of the pressure adjusting liquid 10L becomes lower than the lower end of the first pipe 21 (illustration).
  • the opening of the first pipe 21 is opened, and gas flows from the gas phase in the storage container 10 into the gas phase in the replacement liquid tank 20 via the first pipe 21.
  • the pressure adjusting liquid 10L in the replacement fluid tank 20 is supplied into the storage container 10 through the second pipe 22 by the pressure of the inflow.
  • the opening is closed, and the inflow of gas through the first pipe 21 stops and the second pipe 22 passes through.
  • the supply of the pressure adjusting liquid 10L is also stopped. As described above, since the liquid supply mechanism 1B automatically continues to supply the pressure adjusting liquid 10L into the storage container 10 until the pressure adjusting liquid 10L in the replacement liquid tank 20 disappears, the pressure adjusting liquid in the storage container 10 is maintained. The labor of monitoring and replenishing 10 L can be reduced.
  • the water seal valve 1A of the present embodiment is provided with a wave-proof cylinder 13, and the ripple of the liquid level of the pressure adjusting liquid 10L in the storage container 10 is suppressed. Therefore, it is possible to prevent the first piping 21 from being frequently opened and closed due to the undulation of the liquid level and unnecessary supply of the pressure adjusting liquid 10L from the replacement fluid tank 20. Moreover, it can avoid that the pressure regulation liquid 10L in the storage container 10 is discharged
  • the breathing bag 3 is a member that hangs down in the electrolyte tanks 106 and 107 and communicates with the inside thereof in the atmosphere.
  • the breathing bag 3 for example, a known configuration described in JP-A-2002-175825 can be used.
  • the breathing bag 3 When the inside of the electrolyte tanks 106 and 107 becomes negative pressure, the breathing bag 3 sucks air into the inside thereof to reduce the internal volume of the electrolyte tanks 106 and 107 (excluding the breathing bag 3). The pressure in the tanks 106 and 107 is increased. The breathing bag 3 also functions when the pressure in the electrolyte tanks 106 and 107 becomes positive. Specifically, the gas inside the breathing bag 3 is released to the atmosphere, the internal volume of the electrolyte tanks 106 and 107 (excluding the breathing bag 3) is increased, and the pressure in the electrolyte tanks 106 and 107 is reduced.
  • a water-seal valve 1A described with reference to FIG. 2 can be used to configure a backup mechanism for when the breathing bag 3 fails and does not operate (the same applies to the second to fourth embodiments).
  • the second exhaust pipe 12 of the water seal valve 1A may be communicated with the gas phase in the electrolyte tank 106 (107), and the first exhaust pipe 11 may be communicated with the atmosphere.
  • the breathing bag 3 breaks down when the inside of the electrolyte tanks 106 and 107 becomes a negative pressure, the air is sucked from the first exhaust pipe 11 and is passed through the second exhaust pipe 12. Air flows into the electrolyte tanks 106 and 107.
  • the 3 includes a replacement fluid tank 20 and a third pipe 23.
  • the liquid supply mechanism 1C according to the second embodiment illustrated in FIG.
  • the replacement fluid tank 20 is a member that stores the pressure adjusting liquid 10 ⁇ / b> L, and is disposed above the storage container 10.
  • the upper part of the replacement fluid tank 20 is sealed, and the gas phase of the replacement fluid tank 20 does not communicate anywhere.
  • the third pipe 23 extends from the liquid phase in the replacement fluid tank 20, passes through the gas phase in the storage container 10, opens near the liquid surface of the liquid phase in the storage container 10, and the opening is opened by the liquid level. It is a member that is opened and closed.
  • the third pipe 23 may be considered as a member having both the function of the first pipe 21 and the function of the second pipe 22 in the liquid supply mechanism 1B of the first embodiment.
  • a valve 23 b is provided in the middle of the third pipe 23.
  • the valve 23b is for preventing the pressure adjusting liquid 10L from flowing from the replacement liquid tank 20 into the storage container 10 when the pressure adjusting liquid 10L is replenished into the replacement liquid tank 20.
  • the replacement fluid tank 20 of the liquid supply mechanism 1 ⁇ / b> C also includes an inlet for the pressure adjusting liquid 10 ⁇ / b> L that can be opened and closed at the position of the upper surface. During operation of the RF battery, the inlet is closed and the gas phase of the replacement fluid tank 20 is kept sealed.
  • the internal volume of the replacement fluid tank 20 can be approximately the same as in the first embodiment.
  • the inner diameter of the third pipe 23 is preferably 1 cm or more and 5 cm or less.
  • the liquid supply mechanism 1C having the above configuration, when the amount of the pressure adjusting liquid 10L in the storage container 10 decreases and the liquid level of the pressure adjusting liquid 10L becomes lower than the third pipe 23, the third pipe 23 The pressure adjusting liquid 10L in the replacement fluid tank 20 is supplied into the storage container 10 through the third pipe 23.
  • the opening of the third pipe 23 When the liquid level of the pressure adjusting liquid 10L in the storage container 10 reaches the opening of the third pipe 23, the opening is closed and the supply of the pressure adjusting liquid 10L via the third pipe 23 is also stopped.
  • the liquid supply mechanism 1C automatically supplies the pressure adjusting liquid 10L into the storage container 10 until the pressure adjusting liquid 10L in the replacement liquid tank 20 disappears. The labor of monitoring and replenishing 10 L can be reduced.
  • the water seal valve 1A of the present embodiment is also provided with a wave-proof cylinder 13 that suppresses the undulation of the liquid level of the pressure adjusting liquid 10L in the storage container 10, and stabilizes the open / closed state of the third pipe 23. In addition, excessive discharge of the pressure regulating liquid 10L from the overflow pipe 14 is suppressed.
  • the liquid supply mechanism 1D includes a first water generating device 30 that is provided in the middle of the second exhaust pipe 12 and condenses water vapor contained in the gas discharged from the gas phase in the storage container 10 to the atmosphere.
  • generation apparatus 30 falls to the liquid phase in the storage container 10, and the quantity of the pressure regulation liquid 10L is maintained. Too much pressure adjusting liquid 10L is discharged from the overflow pipe 14. However, since the undulation of the pressure adjusting liquid 10L is suppressed by the wave preventing cylinder 13 provided in the water seal valve 1A, the pressure adjusting liquid 10L is not excessively discharged from the overflow pipe 14.
  • a cooler that cools the second exhaust pipe 12 from the outer periphery, a dehumidifier that uses the Peltier effect, or the like can be used.
  • the replenishment frequency of the pressure adjusting liquid 10L by a human hand can be significantly reduced by replenishing the pressure adjusting liquid 10L using water vapor contained in the atmosphere.
  • Embodiment 4 demonstrates the liquid supply mechanism 1E which replenishes the pressure regulation liquid 10L using the water vapor
  • the liquid supply mechanism 1E includes a second water generation device 40 that condenses water vapor contained in the atmosphere, and an introduction pipe 41 that communicates from the second water generation device 40 to the gas phase in the storage container 10. .
  • generation apparatus 40 is introduce
  • generation apparatus 40 similarly to the 1st water production
  • the replenishment frequency of the pressure adjusting liquid 10L by a human hand can be significantly reduced by replenishing the pressure adjusting liquid 10L using water vapor contained in the atmosphere.
  • the redox flow battery of the present invention can be suitably used as a battery for load leveling or for measures against instantaneous voltage drop or power failure.
  • Redox flow battery (RF battery ⁇ ) DESCRIPTION OF SYMBOLS 1 Pressure adjustment mechanism 10L Pressure regulation liquid 1A Water seal valve 10 Storage container 11 1st exhaust pipe 12 2nd exhaust pipe 13 Wave-proof cylinder 14 Overflow pipe 1B, 1C, 1D, 1E Liquid supply mechanism 20 Supplementary liquid tank 21 1st piping 22 Second piping 23 Third piping 22b, 23b Valve 30 First water generating device 40 Second water generating device 41 Introducing tube 3 Breathing bag 9 Gas phase communicating tube ⁇ Redox flow battery (RF battery ⁇ ) DESCRIPTION OF SYMBOLS 100 Battery unit 101 Diaphragm 102 Positive electrode cell part 103 Negative electrode cell part 104 Positive electrode 105 Negative electrode 106 Electrolyte tank for positive electrodes 107 Electrolyte tank for negative electrodes 108-111 Piping 112,113 Pump

Abstract

L'invention concerne une batterie à flux redox qui est équipée : d'une unité de batterie possédant une électrode positive, une électrode négative et un film de séparation ; d'un réservoir d'électrolyte pour électrode positive qui stocke un électrolyte d'électrode positive alimentant l'unité de batterie ; d'un réservoir d'électrolyte pour électrode négative qui stocke un électrolyte d'électrode négative alimentant l'unité de batterie ; et d'un mécanisme de régulation de pression qui est installé sur le réservoir d'électrolyte pour électrode positive et/ou le réservoir d'électrolyte pour électrode négative, et qui ajuste la pression en phase gazeuse à l'intérieur du réservoir d'électrolyte. En outre, ledit mécanisme de régulation de pression est équipé : d'une valve hermétique à l'eau qui est à son tour équipée d'un réceptacle de stockage stockant un liquide de régulation de pression, d'un premier tube d'échappement de gaz se prolongeant depuis une phase gazeuse à l'intérieur d'un réservoir d'électrolyte, traversant la phase gazeuse à l'intérieur du réceptacle de stockage et s'ouvrant à l'intérieur de la phase liquide interne au réceptacle de stockage, et d'un second tube d'échappement de gaz dont une extrémité s'ouvre dans la phase gazeuse interne au réceptacle de stockage et l'autre extrémité s'ouvre dans l'atmosphère ; et d'un mécanisme d'alimentation en liquide qui fournit le liquide de régulation de pression à l'intérieur du réceptacle de stockage.
PCT/JP2015/062914 2014-05-14 2015-04-30 Batterie à flux redox WO2015174282A1 (fr)

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JP2014100864A JP2015219990A (ja) 2014-05-14 2014-05-14 レドックスフロー電池

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CN109279669A (zh) * 2018-09-26 2019-01-29 高频美特利环境科技（北京）有限公司 液封装置
CN110492145A (zh) * 2019-08-12 2019-11-22 中盐金坛盐化有限责任公司 基于盐穴的有机水相液流电池
CN111448699A (zh) * 2017-12-27 2020-07-24 昭和电工株式会社 氧化还原液流电池
WO2024031923A1 (fr) * 2022-08-10 2024-02-15 寰泰储能科技股份有限公司 Batterie à circulation de vanadium utilisant un agencement de couches différentes

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KR102401319B1 (ko) * 2017-11-28 2022-05-24 스미토모덴키고교가부시키가이샤 레독스 플로우 전지

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CN111448699A (zh) * 2017-12-27 2020-07-24 昭和电工株式会社 氧化还原液流电池
CN109279669A (zh) * 2018-09-26 2019-01-29 高频美特利环境科技（北京）有限公司 液封装置
CN110492145A (zh) * 2019-08-12 2019-11-22 中盐金坛盐化有限责任公司 基于盐穴的有机水相液流电池
CN110492145B (zh) * 2019-08-12 2021-02-19 中盐金坛盐化有限责任公司 基于盐穴的有机水相液流电池
WO2024031923A1 (fr) * 2022-08-10 2024-02-15 寰泰储能科技股份有限公司 Batterie à circulation de vanadium utilisant un agencement de couches différentes

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