A redox flow battery system includes redox flow charging cells to perform charging with power from at least one power source type, individual storages, a common storage, and a controller. Each of the individual storages stores an electrolyte charged with power only from a power source type. The common storage stores an electrolyte charged with power from power source types. The controller switches an electrolyte charged by the redox flow charging cell between an electrolyte in the individual storage and an electrolyte in the common storage and switches an electrolyte charged by the redox flow charging cell between an electrolyte in the individual storage and an electrolyte in the common storage.
H01M 8/18 - Éléments à combustible à régénération, p. ex. batteries à flux REDOX ou éléments à combustible secondaires
H01M 8/04082 - Dispositions pour la commande des paramètres des réactifs, p. ex. de la pression ou de la concentration
H01M 8/04276 - Dispositions pour la gestion du courant d’électrolyte, p. ex. échange de chaleur
H01M 8/2455 - Groupement d'éléments à combustible, p. ex. empilement d'éléments à combustible avec des réactifs liquides, solides ou chargés en électrolyte
2.
REDOX FLOW BATTERY SYSTEM AND METHOD FOR OPERATING REDOX FLOW BATTERY SYSTEM
A redox flow battery system (10) comprises: redox flow charging cells (110A to 110C) to which power is charged from at least one of power supply types (A to C); individual storage units (200A to 200C); a common storage unit (300A); and a control unit (500). The individual storage units (200A to 200C) store an electrolyte to which power is charged from only the power supply types (A to C). The common storage unit (300A) stores an electrolyte to which power is charged from the power supply types (A, C). The control unit (500) switches the electrolyte charged by the redox flow charging cell (110A) to the electrolyte of the individual storage unit (200A) and the electrolyte of the common storage unit (300A) and switches the electrolyte charged by the redox flow charging cell (110C) to the electrolyte of the individual storage unit (200C) and the electrolyte of the common storage unit (300A).
H01M 8/18 - Éléments à combustible à régénération, p. ex. batteries à flux REDOX ou éléments à combustible secondaires
H01M 8/2455 - Groupement d'éléments à combustible, p. ex. empilement d'éléments à combustible avec des réactifs liquides, solides ou chargés en électrolyte
H02J 7/04 - Régulation du courant ou de la tension de charge
H02J 7/34 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon
H02J 3/32 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie utilisant des batteries avec moyens de conversion
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
09 - Appareils et instruments scientifiques et électriques
Produits et services
Electrolytes; electrolytic solution; battery electrolytes;
chemicals for use in industry and science; battery fluid;
accumulators fluid; industrial chemicals; acidulated water
for recharging accumulators; acidulated water for recharging
batteries. Batteries; batteries, electric; electric storage batteries;
accumulators, electric; electrical cells and batteries;
electrolysers; electrolytic cells; solar batteries; solar
cells.
01 - Produits chimiques destinés à l'industrie, aux sciences ainsi qu'à l'agriculture
Produits et services
Electrolytes, namely, battery electrolytes; electrolytic acid vanadium solution being vanadium oxides used as catalysts for chemical processes; battery electrolytes; chemicals for use in industry and science; battery fluid, namely, acidulated solution being acidulated water for charging and discharging batteries; industrial chemicals; acidulated water for recharging accumulators; acidulated water for recharging batteries
5.
ELECTROLYTE MANUFACTURING DEVICE AND METHOD FOR MANUFACTURING ELECTROLYTE
An electrolyte manufacturing device (10) is provided with: an electrolytic cell (100) that includes a separating film (110) for separating an positive-electrode chamber (105a) and a negative-electrode chamber (105c); a circulation section (300) that circulates a positive-electrode solution to the positive-electrode chamber (105a) and a negative-electrode solution to the negative-electrode chamber (105c); and an electricity source unit (500) that supplies current. A negative-electrode (145c) of the electrolytic cell (100) has a carbon fiber layer (148c) on a surface that faces the separating film (110). The electrolytic cell (100) has a positive-electrode net (154a) disposed between the positive-electrode (145a) and the separating film (110) and a negative-electrode net (154c) disposed between the negative-electrode (145c) and the separating film (110). The circulation section (300) circulates the solutions in such a manner that the flow rate of the positive-electrode solution is greater than that of the negative-electrode solution and is at least twice the volume of oxygen gas produced per unit time at 0°C in the positive-electrode chamber (105a).
This method for processing oil combustion ash includes: a slurry production step (S10) for adding water to oil combustion ash containing vanadium and nickel to produce a combustion ash slurry; a magnetic separation step (S20) for magnetically sorting the combustion ash slurry to thereby separate the combustion ash slurry into magnetic material containing vanadium and/or nickel and a magnetic-material-separated slurry; a solid-liquid separation step (S30) for separating the magnetic-material-separated slurry into an aqueous solution and solid content; and a vanadium-nickel separation step (S40) for separating vanadium and/or nickel from the aqueous solution.
[Problem] To provide a method for efficiently producing a high purity vanadium electrolytic solution from a combustion residue that includes uncombusted carbon and that has been emitted from a facility such as a refinery or a power plant. [Solution] A method for producing a vanadium electrolytic solution for a redox flow cell comprising: a vanadium eluate generation step for obtaining a vanadium eluate in which vanadium contained in a combustion residue obtained after combustion of a fossil fuel is eluted; a precipitation step for mixing a sulfide precipitant into the vanadium eluate to precipitate a solid precipitation in a reduced state; and a wet oxidation step including a process for adding dilute sulfuric acid to the solid precipitation separated from the eluate, to generate a vanadium sulfate solution.
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY (Japon)
LE SYSTEM CO.,LTD. (Japon)
Inventeur(s)
Suzuki, Ryosuke
Sato, Kanji
Furukawa, Hideki
Abrégé
[Problem] To provide a method by which high-purity metallic vanadium is manufactured inexpensively and energy efficiently. [Solution] Provided is a method for manufacturing metallic vanadium in which a portion of an inorganic molten salt for forming a molten salt electrolytic bath in a reaction vessel is electrolyzed to generate calcium, and a vanadium compound is thermally reduced by the calcium to manufacture metallic vanadium, wherein at least one of the following conditions is met in the method for manufacturing metallic vanadium: the portion of the inorganic molten salt contains one or more compounds selected from the group consisting of sulfides and sulfate compounds of calcium; and the vanadium compound is a mixed vanadium compound containing one or more compounds selected from the group consisting of vanadium sulfide, vanadium sulfate compounds, vanadium thiosulfate compounds, ammonium metavanadate, and vanadyl sulfate.
[Problem] To provide a method for manufacturing an active material suitable as a material for a cell. [Solution] Provided is a method for manufacturing a solid active material for a vanadium cell, the method having a step for reducing the temperature of a sulfuric acid solution containing bivalent vanadium ions to cause the precipitation of vanadium sulfate, and a unilateral drying step for drying the precipitated vanadium sulfate to obtain a solid material. According to the present invention, a solid active material suitable as an active material for a vanadium redox flow cell can be manufactured easily and inexpensively. The manufactured solid active material exhibits exceptional handleability such as ease of delivery to a greater extent than do liquids, and delivery costs can be reduced.
[Problem] To provide a method for producing an active material which is favorable as a battery material. [Solution] A method for producing a solid active material for vanadium battery use, and having: a step for precipitating a vanadium sulfate by decreasing the temperature of a sulphuric acid solution containing a divalent vanadium ion; and a drying step for obtaining a solid by drying the precipitated vanadium sulfate. The present invention makes it possible to easily produce a solid active material suitable as an active material for a vanadium battery in a low-cost manner. The produced solid active material exhibits excellent handling properties such as better transportability than liquids, and makes it possible to reduce transportation costs.
[Problem] To provide the following: a redox flow battery that makes it possible to keep track of a charging/discharging state within a cell stack and utilize said redox flow battery more efficiently; and a method for operating said redox flow battery. [Solution] A redox flow battery provided with the following: a positive-electrode-liquid storage tank; a negative-electrode-liquid storage tank; a cell stack; a positive-electrode-liquid outbound channel via which a positive-electrode liquid delivered from the positive-electrode-liquid storage tank is sent to positive-electrode chambers of cells in the cell stack; a positive-electrode-liquid return channel via which positive-electrode liquid flowing out of the positive-electrode chambers is sent to the positive-electrode-liquid storage tank; a negative-electrode-liquid outbound channel via which a negative-electrode liquid delivered from the negative-electrode-liquid storage tank is sent to negative-electrode chambers of the cells; a negative-electrode-liquid return channel via which negative-electrode liquid flowing out of the negative-electrode chambers is sent to the negative-electrode-liquid storage tank; an entrance open-circuit-voltage measurement unit that measures an upstream open-circuit voltage between the positive-electrode liquid in the positive-electrode-liquid outbound channel and the negative-electrode liquid in the negative-electrode-liquid outbound channel; and an exit open-circuit-voltage measurement unit that measures a downstream open-circuit voltage between the positive-electrode liquid in the positive-electrode-liquid return channel and the negative-electrode liquid in the negative-electrode-liquid return channel. The flow rates of the electrolytes are controlled in accordance with the measured entrance open-circuit voltage and exit open-circuit voltage, allowing more efficient operation.
[Problem] To provide the following: a redox flow battery that makes it possible to keep track of a charging/discharging state within a cell stack and utilize said redox flow battery more efficiently; and a method for operating said redox flow battery. [Solution] A redox flow battery provided with the following: a positive-electrode-liquid storage tank; a negative-electrode-liquid storage tank; a cell stack; a positive-electrode-liquid outbound channel via which a positive-electrode liquid delivered from the positive-electrode-liquid storage tank is sent to positive-electrode chambers of cells in the cell stack; a positive-electrode-liquid return channel via which positive-electrode liquid flowing out of the positive-electrode chambers is sent to the positive-electrode-liquid storage tank; a negative-electrode-liquid outbound channel via which a negative-electrode liquid delivered from the negative-electrode-liquid storage tank is sent to negative-electrode chambers of the cells; a negative-electrode-liquid return channel via which negative-electrode liquid flowing out of the negative-electrode chambers is sent to the negative-electrode-liquid storage tank; an entrance open-circuit-voltage measurement unit that measures an upstream open-circuit voltage between the positive-electrode liquid in the positive-electrode-liquid outbound channel and the negative-electrode liquid in the negative-electrode-liquid outbound channel; and an exit open-circuit-voltage measurement unit that measures a downstream open-circuit voltage between the positive-electrode liquid in the positive-electrode-liquid return channel and the negative-electrode liquid in the negative-electrode-liquid return channel. The flow rates of the electrolytes are controlled in accordance with the measured entrance open-circuit voltage and exit open-circuit voltage, allowing more efficient operation.
