WO2013058035A1 - 注液式空気電池 - Google Patents
注液式空気電池 Download PDFInfo
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- WO2013058035A1 WO2013058035A1 PCT/JP2012/073164 JP2012073164W WO2013058035A1 WO 2013058035 A1 WO2013058035 A1 WO 2013058035A1 JP 2012073164 W JP2012073164 W JP 2012073164W WO 2013058035 A1 WO2013058035 A1 WO 2013058035A1
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- WIPO (PCT)
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- electrolyte
- type air
- tank
- injection type
- battery container
- Prior art date
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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
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/70—Arrangements for stirring or circulating the electrolyte
- H01M50/77—Arrangements for stirring or circulating the electrolyte with external circulating path
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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
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/04—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type
- H01M12/06—Hybrid cells; Manufacture thereof composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type with one metallic and one gaseous electrode
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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
- H01M12/00—Hybrid cells; Manufacture thereof
- H01M12/08—Hybrid cells; Manufacture thereof composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to an air battery using oxygen as a positive electrode active material, and more particularly to a liquid injection type air battery in which an electrolytic solution is allowed to flow during discharge.
- Patent Document 1 As a conventional air battery, for example, there is one described in Patent Document 1.
- the air battery described in Patent Document 1 includes a battery made up of a large number of unit cells.
- the electrolytic solution in the liquid storage tank is circulated and supplied to the battery, and at the time of discharging, the liquid storage tank is separated and attached to the battery.
- the electrolyte in the drainage tank is circulated and supplied to the battery.
- the air battery is provided with the filter which lets electrolyte solution pass between a liquid storage tank and the pressure pump which supplies electrolyte solution to a battery.
- the present invention has been made in view of the above-described conventional situation, and provides a liquid injection type air battery that can obtain a stable output with a constant composition of the electrolyte supplied to the battery. It is aimed.
- the injection type air battery of the present invention includes an electrode structure including an air electrode and a metal negative electrode, and a battery container capable of holding the electrode structure and an electrolytic solution.
- the liquid-injected air battery includes a supply tank for the electrolyte supplied to the battery container, a discharge tank for the electrolyte discharged from the battery container, and a path from the supply tank to the discharge tank through the battery container.
- the electrolyte circulation mechanism sucks the electrolyte in the supply tank into the battery container, and pressurizing means for feeding the electrolyte in the supply tank to the battery container. It is characterized by comprising at least one means of the decompression means to supply.
- the injection type air battery of the present invention employs the above configuration, the composition of the electrolyte supplied to the battery is constant, and a stable output can be obtained. Further, the apparatus can be reduced in size and weight as compared with the case where the electrolytic solution is circulated.
- sectional drawing (A) which shows the example provided with the pressurization means of the electrolyte solution distribution mechanism, and sectional drawing (B) which shows the example provided with the pressure reduction means.
- sectional drawing (A) which shows the example provided with the pressurization means of the electrolyte solution distribution mechanism, and sectional drawing (B) which shows the example provided with the decompression means.
- sectional drawing (B) which shows the example provided with the pressurization means of an electrolyte solution distribution mechanism, and the example provided with the pressure reduction means (B) is there.
- a liquid injection type air battery C1 shown in FIG. 1 includes an electrode structure A in which a separator 3 is interposed between an air electrode (positive electrode) 1 and a metal negative electrode 2, and a battery that can hold the electrode structure A and an electrolyte solution 4.
- a container 8, a supply tank 5 for the electrolyte 4 supplied to the battery container 8, and a discharge tank 6 for the electrolyte 4 discharged from the battery container 8 are provided.
- the electrode structure A in the illustrated example is a laminated body having an appropriate planar shape such as a rectangular shape or a circular shape, and a supply tank 5 is disposed on one end side on the left side in FIG.
- a discharge tank 6 is arranged.
- liquid-injected air battery C1 is disposed in a path direction from the supply tank 5 to the discharge tank 6 between the supply tank 5 and the battery container 8 and between the battery container 8 and the discharge tank 6.
- a non-returnable check valve 7, 7 is provided.
- check valves 7 and 7 are provided at the outlet of the supply tank 5 and the inlet of the discharge tank 6, but this check valve 7 is provided in piping for circulating the electrolyte solution 4. Also good.
- the liquid injection type air battery C1 includes an electrolyte solution distribution mechanism that distributes the electrolyte solution 4 through a path from the supply tank 5 through the battery container 8 to the discharge tank 6.
- the electrolyte circulation mechanism includes at least one of a pressurizing unit that pumps and supplies the electrolyte 4 in the supply tank 5 to the battery container 8, and a decompression unit that sucks and supplies the electrolyte 4 in the supply tank 5 to the battery container 8.
- a pressurizing unit that pumps and supplies the electrolyte 4 in the supply tank 5 to the battery container 8
- a decompression unit that sucks and supplies the electrolyte 4 in the supply tank 5 to the battery container 8.
- the liquid injection type air battery C1 includes a pressure feed pump 11A disposed between the supply tank 5 and the battery container 8 as a pressurizing means.
- the liquid injection type air battery C1 includes a suction pump 11B disposed between the battery container 8 and the discharge tank 6 as a decompression unit.
- the air electrode 1 is composed of a positive electrode member and a liquid-tight ventilation member arranged in the outermost layer.
- the positive electrode member includes, for example, a catalyst component and a conductive catalyst carrier that supports the catalyst component.
- the catalyst component examples include platinum (Pt), ruthenium (Ru), iridium (Ir), rhodium (Rh), palladium (Pd), osmium (Os), tungsten (W), lead (Pb), Metals such as iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), vanadium (V), molybdenum (Mo), gallium (Ga), aluminum (Al) and the like
- An alloy can be selected.
- the shape and size of the catalyst component are not particularly limited, and the same shape and size as those of conventionally known catalyst components can be employed. However, the shape of the catalyst component is preferably granular.
- the average particle diameter of the catalyst particles is preferably 1 to 30 nm. When the average particle diameter of the catalyst particles is within such a range, it is possible to appropriately control the balance between the catalyst utilization rate related to the effective electrode area where the electrochemical reaction proceeds and the ease of loading.
- the catalyst carrier functions as a carrier for supporting the above-described catalyst component and an electron conduction path involved in the transfer of electrons between the catalyst component and another member.
- Any catalyst carrier may be used as long as it has a specific surface area for supporting the catalyst component in a desired dispersion state and sufficient electron conductivity, and the main component is preferably carbon.
- Specific examples of the catalyst carrier include carbon particles made of carbon black, activated carbon, coke, natural graphite, artificial graphite, and the like.
- the size of the catalyst carrier is not particularly limited, but from the viewpoint of easy loading, catalyst utilization, and catalyst layer thickness control within an appropriate range, the average particle size is about 5 to 200 nm, preferably 10 to 10 nm. About 100 nm is preferable.
- the supported amount of the catalyst component is preferably 10 to 80% by mass, more preferably 30 to 70% by mass, based on the total amount of the electrode catalyst, but is not limited thereto, and the air battery A conventionally known material applied to the above can be applied.
- the liquid-tight ventilation member is a member having liquid-tightness (water-tightness) with respect to the electrolyte solution 4 and air-permeability with respect to oxygen.
- This liquid-tight ventilation member uses a water-repellent film such as polyolefin or fluororesin so as to prevent the electrolyte solution 4 from leaking to the outside, and on the other hand, a large number can supply oxygen to the positive electrode member. Have fine pores.
- the metal negative electrode 2 includes a negative electrode active material composed of a single metal or an alloy whose standard electrode potential is lower than that of hydrogen.
- Examples of simple metals whose standard electrode potential is lower than that of hydrogen include zinc (Zn), iron (Fe), aluminum (Al), magnesium (Mg), manganese (Mn), silicon (Si), titanium (Ti), and chromium. (Cr), vanadium (V), etc. can be mentioned.
- Examples of the alloy include those obtained by adding one or more metal elements or non-metal elements to these metal elements.
- the material is not limited to these, and a conventionally known material applied to the air battery can be applied.
- separator 3 examples include glass paper that has not been subjected to water repellent treatment, and a porous film made of polyolefin such as polyethylene or polypropylene.
- the material is not limited to these, and a conventionally known material applied to the air battery can be applied.
- an aqueous solution of potassium chloride, sodium chloride, potassium hydroxide, or the like can be applied, but is not limited thereto, and a conventionally known electrolytic solution that is applied to an air battery is applied. Can do.
- the amount of the electrolyte solution 4 takes into consideration the discharge time of the injection type air battery C1, the amount of metal salt deposited during discharge, the total volume of pores of the separator 3, and the flow rate capable of maintaining a constant composition. Determined.
- the battery container 8 holds the electrode structure A and the electrolyte solution 4, maintains the liquid tightness of at least the outer periphery of the electrode structure A, and prevents leakage of the electrolyte solution.
- the battery container 8 includes a case separate from the electrode structure A, an outer frame member that forms the outer periphery of the electrode structure A, and the like.
- the injection type air battery C1 having the above-described configuration has the battery container 8 filled with the electrolyte 4 in the initial state.
- the initial filling amount of the electrolytic solution 4 is an amount substantially corresponding to the total volume of the air holes of the air electrode 1 including the separator 3.
- the liquid injection type air battery C1 opens the air electrode 1 and supplies the electrolytic solution 4 in the supply tank 5 to the battery container 8 at the time of startup. That is, in the injection type air battery C1 shown in FIG. 1 (A), the pumping pump 11A is driven, and the electrolyte 4 in the supply tank 5 is pumped and supplied to the battery container 8 by the pressure. The electrolytic solution 4 filled in the container 8 is discharged into the discharge tank 6 so as to be extruded.
- the suction pump 11B is driven, and the electrolytic solution 4 in the supply tank 5 is sucked and supplied to the battery container 8 by the negative pressure.
- the electrolytic solution 4 in the battery container 8 is discharged to the discharge tank 6.
- the supply of the electrolyte solution 4 can be performed continuously or intermittently, and can be made constant or increased or decreased even when the supply amount is unit time.
- the injection type air battery C1 allows the electrolytic solution 4 to flow in one direction along the path from the supply tank 5 through the battery container 8 to the discharge tank 6.
- the precipitate (metal salt) generated at the time of discharge is quickly discharged to the discharge tank 6, and the battery container 8 is always supplied with the fresh electrolyte 4 having a constant composition. Therefore, a stable output can be maintained.
- the injection type air battery C1 is provided with check valves 7 and 7 between the supply tank 5 and the battery container 8 and between the battery container 8 and the discharge tank 6, the electrolyte solution 4 is prevented, and the composition of the electrolytic solution 4 in the battery container 8 can be maintained satisfactorily.
- liquid injection type air battery C1 does not have a filter as compared with the conventional air battery in which the electrolytic solution is circulated through the filter, and naturally, there is a concern that the filter is clogged with precipitates.
- the device structure is greatly simplified, and a reduction in size and weight can be realized.
- FIG. 2 is a view for explaining another embodiment of the injection type air battery of the present invention. Note that, in each embodiment described below, the same components as those in the embodiment shown in FIG.
- the injection type air battery C2 shown in the figure includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, a battery container 8 that accommodates and holds the electrode structure A and an electrolyte solution 4, an electrolysis A liquid supply tank 5 and a discharge tank 6 are provided.
- the injection type air battery C2 includes pressurizing means for supplying the electrolyte solution 4 in the supply tank 5 to the battery container 8 by pressure, and decompression means for supplying the electrolyte solution 4 in the supply tank 5 to the battery container 8 by suction.
- An electrolyte circulation mechanism having at least one of the means is provided.
- the liquid injection type air battery C2 includes a piston 12A movably disposed inside the supply tank 5 and a piston driving actuator 13A as pressurizing means. Yes.
- This pressurizing means pushes the piston 12A in a direction (downward in FIG. 1) in which the volume of the electrolytic solution storage space of the supply tank 5 decreases by the actuator 13A, and thereby the electrolytic solution in the supply tank 5 4 is pressurized and supplied to the battery container 8 by pressure.
- the liquid injection type air battery C2 includes a piston 12B and a piston driving actuator 13B that are movably disposed inside the discharge tank 6 as decompression means. .
- This decompression means pulls the piston 12B in the direction in which the volume of the electrolyte solution storage space of the discharge tank 6 increases (upward in FIG. 1) by the actuator 13B, and the electrolyte solution in the supply tank 5 by the negative pressure. 4 is sucked and supplied to the battery container 8.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and the deposits are discharged from the battery container 8 as in the previous embodiment. , Can maintain a stable output.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the structure can be made inexpensive and highly reliable as compared with the case where a pump is used.
- the actuators 13A and 13B in the above embodiment are not particularly limited in configuration.
- a working fluid such as cylinders
- the structure of the device is complicated by various devices including a fluid source. Therefore, it is preferable to integrate a motor and a mechanism for converting the rotation thereof into a linear motion.
- An injection type air battery C3 shown in FIG. 3 includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, and a battery container 8 that accommodates and holds the electrode structure A and the electrolyte solution 4.
- a supply tank 5 and a discharge tank 6 for the electrolytic solution 4 are provided.
- both the supply tank 5 and the discharge tank 6 can be deformed so as to expand and contract.
- the supply tank 5 and the discharge tank 6 are arranged in the in-plane direction of the electrode structure A (the plane in the horizontal direction in the drawing). It forms a bellows shape that expands and contracts in the direction along the direction.
- the materials of the supply tank 5 and the discharge tank 6 are not particularly limited.
- PE polyethylene
- PP polypropylene
- PVC polyvinyl chloride
- PET polyethylene terephthalate
- the liquid injection type air battery C3 includes pressurizing means for supplying the electrolyte 4 in the supply tank 5 to the battery container 8 by pressure, and decompression means for supplying the electrolyte 4 in the supply tank 5 to the battery container 8 by suction.
- An electrolyte circulation mechanism having at least one of the means is provided.
- the liquid injection type air battery C3 includes an actuator 14A that drives the supply tank 5 in the contracting direction as a pressurizing unit.
- This pressurizing means is pushed by the actuator 14A in the direction in which the supply tank 5 is contracted (rightward in FIG. 1), thereby pressurizing the electrolyte 4 in the supply tank 5 and pumping it to the battery container 8. Supply.
- the liquid injection type air battery C3 includes an actuator 14B that drives the discharge tank 6 in the expansion direction as decompression means.
- This decompression means pulls the discharge tank 6 in the direction of expansion (rightward in FIG. 1) by the actuator 14B, and sucks and supplies the electrolytic solution 4 in the supply tank 5 to the battery container 8 by the negative pressure.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and the deposits are discharged from the battery container 8 as in the previous embodiment.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the structure can be made inexpensive and highly reliable as compared with the case where a pump is used.
- the supply tank 5 and the discharge tank 6 themselves expand and contract, there is an advantage that the sealing performance of the electrolytic solution 4 is maintained and the electrolytic solution 4 does not come into contact with other components.
- a liquid injection type air battery C4 shown in FIG. 4 includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, and a battery container 8 that accommodates and holds the electrode structure A and the electrolytic solution 4.
- a supply tank 5 and a discharge tank 6 for the electrolytic solution 4 are provided.
- the liquid injection type air battery C4 includes an electrolyte solution distribution mechanism having a pressurizing unit that supplies the electrolyte solution 4 in the supply tank 5 to the battery container 8 by pressure.
- the injection type air battery C4 includes a means for supplying a pressurizing gas to the supply tank 5 as a pressurizing means, and more specifically, a gas supply source and a supply tank 5 (not shown). An inserted gas supply pipe 15 is provided.
- the pressurizing means pressurizes and supplies the electrolytic solution 4 in the supply tank 5 to the battery container 8 by supplying a pressurization gas into the supply tank 5.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and deposits are discharged from the battery container 8 as in the previous embodiment. , Can maintain a stable output.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the structure can be made inexpensive and highly reliable as compared with the case where a pump is used.
- the inside of the discharge tank 6 is sucked and exhausted, and the negative pressure of the electrolyte 4 in the supply tank 5 is sucked and supplied to the battery container 8. It is also possible to adopt means. However, in this case, since it is necessary to take measures to prevent the electrolytic solution 4 from entering the suction system of the decompression means, the apparatus structure becomes simpler if the pressurization means is employed as in the above embodiment.
- the liquid injection type air battery C5 shown in FIG. 5 includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, and a battery container 8 that houses and holds the electrode structure A and the electrolyte solution 4.
- an electrolyte solution distribution mechanism an electrolyte solution tank 16, a piston 17 disposed in the electrolyte solution tank 16, and a drive device for the piston 17 are provided.
- the piston 17 in the illustrated example is arranged so as to be movable in the lateral direction in the electrolyte tank 16.
- the drive device includes a pair of screw shafts 18 and 18 that engage with the piston 17, and the piston 17 is moved by rotationally driving each screw shaft 18 with a motor (not shown).
- the first and second pressure chambers 16 ⁇ / b> A and 16 ⁇ / b> B whose volumes change inversely with the movement of the piston 17 are formed on both sides of the piston 17 in the electrolytic solution tank 16. is doing.
- the first pressure chamber 16A is used as a supply tank (5) for the electrolytic solution 4
- the second pressure chamber 16B is used as a discharge tank (6) for the electrolytic solution 4.
- the injection type air battery C5 is provided with an electrolytic solution circulation mechanism in which a pressurizing unit and a depressurizing unit are integrated. Then, by moving the piston 17 with the screw shaft 18 of the driving device, the volume of the first pressure chamber 16A (supply tank 5) is reduced, and the electrolyte 4 is pressurized and supplied to the battery container 8 by pressure. At the same time, the volume of the second pressure chamber 16B (discharge tank 6) is increased, and the electrolyte 4 is sucked and supplied to the battery container 8 by the negative pressure.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and the deposits are discharged from the battery container 8 as in the previous embodiment. , Can maintain a stable output.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the structure can be made inexpensive and highly reliable as compared with the case where a pump is used.
- the number of tanks of the electrolyte 4 is substantially one (electrolyte tank 16), and the electrolyte circulation mechanism includes both the pressurizing means and the decompression means, and both are integrated. As a result, the structure of the apparatus is further improved.
- An injection type air battery C6 shown in FIG. 6 includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, and a battery container 8 that accommodates and holds the electrode structure A and the electrolyte solution 4.
- a supply tank 5 and a discharge tank 6 for the electrolytic solution 4 are provided.
- the injection type air battery C6 includes an electrolyte solution circulation mechanism having a pressurizing means for supplying the electrolyte solution 4 in the supply tank 5 to the battery container 8 by pressure.
- the pressurizing means of this embodiment includes a piston 12 ⁇ / b> A movably arranged inside the supply tank 5 and a piston driving actuator 13 ⁇ / b> A.
- the electrolytic solution 4 exists only in the supply tank 5 in the initial state, and an open / close valve 19 is provided between the supply tank 5 and the battery container 8.
- a check valve 7 similar to that of each of the previous embodiments is provided between the battery container 8 and the discharge tank 6.
- the liquid injection type air battery C6 is a liquid injection type liquid air battery in which the electrolytic solution 4 is not injected into the battery container 8 in the initial state, so that the oxygen supply to the air electrode 1 is cut off. There is no need.
- the opening / closing valve 19 is opened, and the piston 12A is pushed by the actuator 13A, whereby the electrolyte 4 in the supply tank 5 is pressurized and supplied to the battery container 8 by pressure. .
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and the deposits are discharged from the battery container 8 as in the previous embodiment. , Can maintain a stable output.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the self-discharge before use can be prevented with a simple configuration using the on-off valve 19, so that it can be stored for a long period of time.
- the liquid injection type air battery C6 may employ an automatic opening valve that can be opened at a predetermined pressure or a closing member that can be opened at a predetermined pressure, instead of the opening / closing valve 19.
- the automatic opening valve and the closing member can be opened (or cleaved) by simply pressurizing the electrolyte solution 4 with the pressurizing means, so that an operation for opening the valve is unnecessary and the device structure Can be made easier and can contribute to the reduction of manufacturing costs.
- a liquid injection type air battery C7 shown in FIG. 7 includes an electrode structure A in which a separator 3 is interposed between an air electrode 1 and a metal negative electrode 2, and a battery container 8 that houses and holds the electrode structure A and the electrolyte solution 4.
- a supply tank 5 and a discharge tank 6 for the electrolytic solution 4 are provided.
- the injection type air battery C7 includes a pressurizing means for supplying the electrolytic solution 4 in the supply tank 5 to the battery container 8 by pressure, and a depressurizing means for supplying the electrolytic solution 4 in the supply tank 5 to the battery container 8 by suction.
- An electrolyte solution distribution mechanism having both is provided.
- the pressurizing means of this embodiment includes a piston 12A movably arranged inside the supply tank 5, and an actuator 13A for driving the piston.
- the decompression means includes a suction pump 11B disposed between the battery container 8 and the discharge tank 6 as in the embodiment shown in FIG.
- the electrolyte 4 is present only in the supply tank 5 in the initial state, and is opened and closed between the supply tank 5 and the battery container 8.
- a valve 19 is provided.
- a check valve 7 similar to that of each of the previous embodiments is provided between the battery container 8 and the discharge tank 6.
- the above-described liquid injection type air battery C7 can supply the electrolytic solution 4 to the battery container 8 by opening the on-off valve 19 and operating at least one of the pressurizing means and the speed reducing means at the time of activation.
- the actuator 13A pushes the piston 12A, thereby pressurizing the electrolyte 4 in the supply tank 5 and feeding it to the battery container 8.
- the pressure reducing means by operating the suction pump 11B, the electrolytic solution 4 in the supply tank 5 is sucked and supplied to the battery container 8 at the negative pressure.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8, and the deposit is discharged from the battery container 8. Therefore, a stable output can be maintained.
- the structure of the apparatus can be simplified, the size and weight can be reduced, and the self-discharge before use can be prevented with a simple configuration using the on-off valve 19, so that it can be stored for a long period of time.
- the liquid injection type air battery C7 includes the opening / closing valve 19 and the suction pump 11B as the decompression means. Therefore, the battery container 8 can be operated by operating the suction pump 11B with the opening / closing valve 19 closed. The electrolyte 4 inside can be sucked and discharged to the discharge tank 6. Thereby, it becomes possible to make the electrode structure A dry and to stop discharge temporarily.
- a liquid injection type air battery C8 shown in FIG. 8 has a basic structure equivalent to that shown in FIG. 1 (A), and in accordance with the state detection values of the electrode structure A and the electrolytic solution 4 during discharge, 8 is provided with a controller 20 for controlling the supply amount of the electrolyte 4 to 8. More precisely, the controller 20 controls the supply amount of the electrolytic solution 4 to the battery container 8 by driving the electrolytic solution circulation mechanism (pressurizing unit / depressurizing unit). That is, in this embodiment, the controller 20 controls the supply amount of the electrolyte solution 4 by driving the pressure pump 11A.
- the discharge current of the electrode structure A is used as a state detection value of the electrode structure A.
- the controller 20 drives the pumping pump 11A based on the detected value to supply the electrolyte 4 to the battery container 8.
- the controller 20 controls the operation of the pressure feed pump 11A so that the supply amount of the electrolytic solution 4 changes according to the detected value of the discharge current.
- a liquid injection type air battery C9 shown in FIG. 9 has a basic structure equivalent to that shown in FIG. 1 (A), and a battery container 8 according to the state detection values of the electrode structure A and the electrolytic solution 4 at the time of discharge.
- a controller 20 is provided for controlling the amount of the electrolyte 4 supplied to the battery.
- the internal resistance value of the electrode structure A and the resistance value of the electrolyte 4 discharged from the battery container 8 are used as the state detection values of the electrode structure A and the electrolyte solution 4. . That is, since the characteristic of the electrolytic solution 4 appears as a resistance value, the composition change of the electrolytic solution 4 can be grasped by detecting the internal resistance value of the electrode structure A and the resistance value of at least one of the discharged electrolytic solution 4. Can do.
- the internal resistance value of the electrode structure A and the resistance value of the discharged electrolyte solution 4 are detected, and the supply amount of the electrolyte solution 4 to the battery container 8 is detected by the controller 20 based on the detected value.
- the controller 20 controls the supply amount of the electrolyte 4 by driving the pressure pump 11A so that the internal resistance value of the electrode structure A and the resistance value of the electrolyte solution 4 are constant or within a predetermined range.
- the internal resistance ( ⁇ ) of the electrode structure A can be obtained by the product of the current change ⁇ I (A) and the voltage change ⁇ V (V). Therefore, when using the resistance value of the electrode structure A, for example, an upper limit and a lower limit of the resistance value are set in advance, and supply of the electrolyte solution 4 is started when the upper limit is reached, and when the lower limit is reached. The supply of the electrolytic solution 4 may be stopped.
- the actual numerical value varies depending on the material of the electrolytic solution 4, but similarly, the upper limit and the lower limit of the resistance value are set in advance, and when the lower limit is reached, the electrolytic solution 4 may be started, and the supply of the electrolyte solution 4 may be stopped when the upper limit is reached.
- liquid injection type air battery C8 can keep the composition of the electrolytic solution 4 in the battery container 8 constant at all times, as in the previous embodiment, and can maintain good battery characteristics. .
- the controller 20 that controls the supply amount of the electrolytic solution 4 to the battery container 8 according to the state detection values of the electrode structure A and the electrolytic solution 4.
- the density of the electrolytic solution 4 discharged from the battery container 8 can also be used as another status detection value.
- a float type density meter or a vibration type density meter is provided at the outlet portion of the battery case 8 of the electrode structure A.
- the controller 20 controls the supply amount of the electrolytic solution 4 to the battery container 8 based on the detected value.
- the upper limit and the lower limit of the density are set in advance like the resistance value, and supply of the electrolyte solution 4 is started when the upper limit is reached. When it reaches, supply of the electrolyte solution 4 is stopped.
- the composition of the electrolytic solution 4 in the battery container 8 can always be kept constant, and the battery characteristics can be maintained well.
- FIG. 10 is a flowchart for explaining the control process of the controller in the injection type air battery. That is, when the use of the battery is started, initial supply (injection) of the electrolytic solution is performed in step S1, and the state of the electrode structure and the electrolytic solution is detected in step S2.
- the situation detection in step S2 includes the discharge current measurement in step S2A (discharge current detection in electrode structure A in FIG. 8), the internal resistance measurement in step S2B (internal resistance value detection in electrode structure A in FIG. 9), and step S2C. Electrolytic solution resistance measurement (resistance value detection of the electrolytic solution after discharging in FIG. 9) and electrolytic solution density measurement in step S2D. These steps S2A to S2D may all be performed or any one of them may be selected.
- step S3 the electrolyte flow mechanism is driven to control the amount of electrolyte supplied to the battery container in accordance with the detection values obtained in the previous steps S2A to S2D. Sense the amount of liquid supplied and enter the data.
- the supply amount (L / sec) of the electrolytic solution per unit time has been described, but the supply rate (L / h) of the electrolytic solution is shown in FIG.
- step S5 it is determined whether or not a transition to the long-term stop state is made.
- step S6 it is determined whether or not the discharge is terminated due to a voltage drop. If both steps S5 and S6 are negative (N), the process returns to step S2 and the same control is repeated.
- the transition to the long-term stop state is a state where the battery becomes a predetermined voltage or less, or a long-term stop state when the battery has not been started for a predetermined period or more after the end of discharge is determined. It is determined that it has become.
- indications such as button operation by the operator of the apparatus which connected the said injection type
- the controller 20 shown in FIGS. 8 and 9 includes determination means (step S5) for determining that the liquid injection type air battery has shifted to the long-term stop state. Then, as will be described later, when it is determined by the determination means that the controller 20 has shifted to the long-term stop state, the controller 20 operates the pressure reducing means of the electrolyte circulation mechanism to dry the inside of the battery container.
- step S7 the supply of the electrolytic solution is stopped, and the apparatus provided with the pressure reducing means is driven, and thereafter
- step S8 it is confirmed that the process is stopped in the dry state, and the control is terminated.
- step S8 is maintained. It is possible to return to step S1 and restart.
- a liquid injection type air battery C10 shown in FIG. 11 includes an electrode structure A, a supply tank 5 and a discharge tank 6 which are integrated into a cartridge C, and a holder H to which the cartridge C can be attached and detached. Yes.
- the supply tank 5 and the discharge tank 6 in the cartridge C have a bellows shape similar to that shown in FIG. 3, and can be deformed in the direction of expansion and contraction.
- the holder H has a housing portion D for the cartridge C, and is provided with a motor M and a pressing plate P as pressurizing means for the electrolyte circulation mechanism toward the housing portion D.
- the holder H of the example of illustration is provided with the controller 20 which controls the supply amount of the electrolyte solution 4 to the battery container 8 according to the discharge current of the electrode structure A at the time of discharge similarly to what is shown in FIG. Yes.
- the cartridge C and the holder H are in a separated state as shown in FIG. Then, the liquid injection type air battery C10 is started by mounting the cartridge C in the accommodating portion D of the holder H as shown in FIG. 11B, and the supply tank 5 is compressed by the motor M via the pressing plate P.
- the electrolyte solution 4 is pressurized and supplied to the battery container 8, and the used electrolyte solution 4 is discharged to the discharge tank 6.
- the fresh electrolytic solution 4 having a constant composition is always supplied to the battery container 8 and the deposit is discharged from the battery container 8 as in the previous embodiment. , Can maintain a stable output. In addition, simplification of the device structure and reduction in size and weight can be realized. Furthermore, since the liquid injection type air battery C10 has the cartridge C and the holder H as separate bodies, battery replacement can be facilitated and the recycling cost can be reduced.
- the liquid injection type air battery has a configuration in which the electrode structure A and the tanks 5 and 6 are separated, a motor
- the actuator including the M, the power transmission unit, and the controller 20 can be configured to be selectively separated. For example, if the structure is separated from the parts that are expensive and heavy in weight and volume, the structure is inexpensive and easy to handle. It becomes.
- the main power source can be used in various mobile objects such as automobiles, trains and ships. Or it is very suitable to mount as an auxiliary power supply, and it is possible to selectively apply the structure of each embodiment according to the mobile body and use to which it applies.
- the configuration of the injection-type air battery of the present invention is not limited to the above-described embodiments, and the detailed configuration can be appropriately changed without departing from the gist of the present invention.
- the supply amount of the electrolyte solution to the battery container is controlled in accordance with the detected state value of the electrode structure or the electrolyte solution. It is also possible to keep the composition of the electrolyte solution in the battery container constant by monitoring the operation state of the decompression means) and feeding back this.
- the operating conditions of the electrolyte flow mechanism include the number of revolutions of the pump, displacement of the actuator, movement amount of the piston, and deformation amount of the tank. The relationship between these detected values and the supply amount of the electrolyte is set in advance. Just keep it.
- the injection type air battery of the present invention can have various shapes such as a rectangular shape and a circular shape, and can also be used by connecting a plurality thereof. In such a case, it is also possible to share the electrolyte tank and the liquid solution circulation mechanism (pressurizing means / depressurizing means) in the whole or a part of the batteries. As a result, the liquid injection type air battery system can also be reduced in size and weight.
- the configuration may be such that the electrolyte solution is filled in the supply tank when starting up. It is also possible to adjust the composition of the electrolytic solution by adding a solute.
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Abstract
Description
供給量(L/sec)=
放電電流(A)/設計放電容量(A・sec)×初期タンク電解液量(L)
C1~C10 注液式空気電池
1 空気極
2 金属負極
3 セパレータ
4 電解液
5 供給用タンク
6 排出用タンク
7 逆止弁
8 電池容器
11A 圧送ポンプ(電解液流通機構の加圧手段)
11B 吸引ポンプ(電解液流通機構の減圧手段)
12A ピストン(電解液流通機構の加圧手段)
12B ピストン(電解液流通機構の減圧手段)
13A 14A アクチュエータ(電解液流通機構の加圧手段)
13B 14B アクチュエータ(電解液流通機構の減圧手段)
15 気体供給管(電解液流通機構の加圧手段)
16 電解液タンク
16A 第1圧力室(供給用タンク)
16B 第2圧力室(排出用タンク)
17 ピストン(電解液流通機構)
18 スクリューシャフト(電解液流通機構の駆動装置)
19 開閉弁
20 コントローラ(判定手段S5)
Claims (15)
- 空気極と金属負極を備えた電極構造体と、
電極構造体及び電解液を保持可能な電池容器を備えており、
電池容器に供給する電解液の供給用タンクと、
電池容器から排出された電解液の排出用タンクと、
供給用タンクから電池容器を経て排出用タンクに至る経路に電解液を流通させる電解液流通機構を備えたことを特徴とする注液式空気電池。 - 電解液流通機構が、供給用タンクから電池容器に電解液を圧送する加圧手段と、電池容器から排出用タンクに電解液を吸引する減圧手段のうちの少なくとも一方の手段を備えていることを特徴とする請求項1に記載の注液式空気電池。
- 加圧手段が、供給用タンクと電池容器の間に配置した圧送ポンプを備えており、
減圧手段が、電池容器と排出用タンクとの間に配置した吸引ポンプを備えていることを特徴とする請求項2に記載の注液式空気電池。 - 加圧手段が、供給用タンクの内部に配置したピストンと、ピストン駆動用のアクチュエータを備えており、
減圧手段が、排出用タンクの内部に配置したピストンと、ピストン駆動用のアクチュエータを備えていることを特徴とする請求項2に記載の注液式空気電池。 - 供給用タンク及び排出用タンクが、膨張収縮する状態に変形可能であって、
加圧手段が、供給用タンクを収縮方向に駆動するアクチュエータを備えており、
減圧手段が、排出用タンクを膨張方向に駆動するアクチュエータを備えていることを特徴とする請求項2に記載の注液式空気電池。 - 加圧手段が、供給用タンクに加圧用気体を供給する手段であることを特徴とする請求項2に記載の注液式空気電池。
- 当該注液式空気電池が長期停止状態に移行したことを判定する判定手段を備え、
上記判定手段により長期停止状態に移行したことが判定された場合に、上記減圧手段を作動し電池容器内を乾燥させることを特徴とする請求項2~6のいずれか1項に記載の注液式空気電池。 - 電解液流通機構が、電解液タンクと、電解液タンク内に配置したピストンと、ピストンの駆動装置を備えると共に、電解液タンク内に、ピストンの移動に伴って容積が反比例的に変化する第1及び第2の圧力室を形成し、第1の圧力室を電解液の供給用タンクとし、第2の圧力室を電解液の排出用タンクとしたことを特徴とする請求項1に記載の注液式空気電池。
- 供給用タンクと電池容器との間、及び電池容器と排出用タンクとの間の少なくとも一方に、供給用タンクから排出用タンクに至る経路方向に流通可能な逆止弁を備えたことを特徴とする請求項1~8のいずれか1項に記載の注液式空気電池。
- 初期状態において電解液が供給用タンクのみに存在し、供給用タンクと電池容器との間に、開閉弁、所定圧力で開放可能な自動開放弁、及び所定圧力で開裂可能な閉塞部材のうちのいずれか1つを備えたことを特徴とする請求項1~8のいずれか1項に記載の注液式空気電池。
- 供給用タンクと電池容器との間に配置した開閉弁と、前記減圧手段を備えたことを特徴とする請求項2~8のいずれか1項に記載の注液式空気電池。
- 放電時における電極構造体や電解液の状況検出値に応じて電池容器への電解液の供給量を制御するコントローラを備えたことを特徴とする請求項1~11のいずれか1項に記載の注液式空気電池。
- 状況検出値が、電極構造体の放電電流であることを特徴とする請求項12に記載の注液式空気電池。
- 状況検出値が、電極構造体の内部抵抗値及び電池容器から排出された電解液の抵抗値の少なくとも一方の抵抗値であることを特徴とする請求項12に記載の注液式空気電池。
- 状況検出値が、電池容器から排出された電解液の密度であることを特徴とする請求項12に記載の注液式空気電池。
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US14/351,684 US10020551B2 (en) | 2011-10-21 | 2012-09-11 | Liquid activated air battery |
CN201280050415.9A CN103875122B (zh) | 2011-10-21 | 2012-09-11 | 注液式空气电池 |
JP2013539572A JP5769095B2 (ja) | 2011-10-21 | 2012-09-11 | 注液式空気電池 |
EP12842500.6A EP2770578B1 (en) | 2011-10-21 | 2012-09-11 | Fluid injection-type air battery |
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JP2011231432 | 2011-10-21 | ||
JP2011-231432 | 2011-10-21 |
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EP (1) | EP2770578B1 (ja) |
JP (1) | JP5769095B2 (ja) |
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JP2015072744A (ja) * | 2013-10-01 | 2015-04-16 | 日産自動車株式会社 | 金属空気電池 |
WO2015115479A1 (ja) * | 2014-01-29 | 2015-08-06 | シャープ株式会社 | 金属空気電池 |
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JP2016081576A (ja) * | 2014-10-10 | 2016-05-16 | 日産自動車株式会社 | 電池システム |
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JPWO2013058035A1 (ja) | 2015-04-02 |
US20140272609A1 (en) | 2014-09-18 |
EP2770578A1 (en) | 2014-08-27 |
EP2770578A4 (en) | 2015-04-08 |
CN103875122B (zh) | 2017-03-01 |
JP5769095B2 (ja) | 2015-08-26 |
EP2770578B1 (en) | 2016-04-20 |
US10020551B2 (en) | 2018-07-10 |
CN103875122A (zh) | 2014-06-18 |
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