WO2012084548A1 - Elektrochemische speichereinrichtung zum zwischenspeichern von elektrischer energie und verfahren zum betreiben der speichereinrichtung - Google Patents
Elektrochemische speichereinrichtung zum zwischenspeichern von elektrischer energie und verfahren zum betreiben der speichereinrichtung Download PDFInfo
- Publication number
- WO2012084548A1 WO2012084548A1 PCT/EP2011/072284 EP2011072284W WO2012084548A1 WO 2012084548 A1 WO2012084548 A1 WO 2012084548A1 EP 2011072284 W EP2011072284 W EP 2011072284W WO 2012084548 A1 WO2012084548 A1 WO 2012084548A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fuel cell
- storage device
- fuel
- storage
- electrical energy
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/186—Regeneration by electrochemical means by electrolytic decomposition of the electrolytic solution or the formed water product
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M16/00—Structural combinations of different types of electrochemical generators
- H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
- H01M2300/0071—Oxides
- H01M2300/0074—Ion conductive at high temperature
-
- 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
-
- 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
- Electrochemical storage device for buffering electrical energy and method for operating the storage device
- the invention relates to an electrochemical spoke pure Rich ⁇ processing for temporarily storing electric power and a method for operating the memory device.
- renewable energy sources include, for example, wind energy, which is exploited using wind turbines, for example in wind farms. In most Re ⁇ regions in which wind farms are situated, the amount of wind varies more or less strongly and is not coincident generally with a capacity of a power grid into which the electrical energy produced by the wind park is fed a ⁇ .
- the wind is strong, especially when the grid utilization is low. This is the case, recognized when for example at night, the amount of wind is high, because the ⁇ can not be consumed in electric power generated.
- this problem is solved by turning off the wind farm, so that the surplus electrical energy is not even generated and fed into the power grid.
- the disadvantage here is that the maxi ⁇ times possible energy generation potential of the wind farm is capped, whereby the efficiency of the wind farm is reduced.
- the object of the invention is to provide an electrochemical SpeI ⁇ cher adopted for intermediate storage of electric power and a method for operating the memory device, wherein with the electrochemical storage means excess electrical energy stored and retrieved again.
- the electrochemical storage device for buffering electrical energy has a rechargeable fuel cell and a current direction switch.
- the fuel cell has two electrodes and comprising ⁇ hold an oxidizable and reducible material and a redox couple formed from a fuel and an Brennstoffpro ⁇ domestic product. Further, the fuel cell has a charge state decision, in which the material oxidized by the fuel product and the fuel is formed, and a charging state, in which the material is reduced by the combustion ⁇ material and the fuel product is formed.
- the electrodes are optionally either connected to an energy source for import of electrical energy, so that the fuel cell is in the Aufla ⁇ deschreib, or connected to an energy consumer for the export of electrical energy, so that the fuel cell is in the discharge state ,
- a power grid for example, wind turbines or other renewable energy sources are integrated, with which electrical energy is produced.
- the memory device, ge ⁇ Gurss of the present invention can be connected to the mains, via which the storage device is connected consumer in a energy and via the said memory means an energy source in the form of wind turbines or other renewable energy sources is available.
- the memory device can be switched to the discharging state, so that the information stored in the storage device electric power can be Tar ⁇ indicate the power supply.
- wind turbines can be operated at high wind levels, although the electrical Ener ⁇ energy thus generated can not be immediately removed immediately. As a result, the wind turbines need not be turned off when there is an oversupply of wind, whereby the maximum possible power generation potential of Windkrafträ ⁇ can be exploited.
- the oxidizable and reducible mate ⁇ rial metal in particular lithium, manganese, iron or titanium or an alloy of these metals, which is the metal in a reduced form and in oxidized form a metal oxide.
- the redox couple is preferably made based on what ⁇ hydrogen and water vapor and the discharge is before Trains t ⁇ a reaction between the steam and the material and in the supercharging is preferably a reaction Zvi ⁇ rule the steam and the material.
- Preferred dimensions of the fuel cell is operated with process gas, which is air.
- the operating temperature of the fuel cell is preferably between 600 and 800 ° C.
- an oxygen-ion flow is established between the electrodes, which is coupled via the redox pair and the material.
- the oxygen-ion flow is reversed.
- the process gas reacts with hydrogen to form water vapor.
- the water vapor is passed to the material which is oxidized to an oxide of the material.
- the water vapor is reduced to hydrogen, which migrates back and reacts again with the process gas, whereby water vapor ent ⁇ stands.
- the material is alsoxi ⁇ diert of the water vapor, wherein an oxide of the material is formed.
- the redox couple is regenerated by the absorption of oxygen, whereby hydrogen is produced.
- the fuel cell is preferably a Festoxidbrennstoffzel ⁇ le having a chamber with one of the electrodes is electrically conductively connected, that contains the oxidizable and reducible material and the redox couple, which is gaseous at the temperature of the solid oxide fuel cell Be ⁇ drive.
- the chamber is filled with the material, represents a Re ⁇ servoir of this material.
- the amount of material results in the time required for the material to be completely reduced in the charging state of the fuel cell or to be completely oxidized in the discharge state.
- the fuel cell preferably has a storage volume for the fuel.
- the storage medium ⁇ storage volume is arranged outside of the fuel cell and is designed as a pressure vessel.
- the inventive method for operating the electrochemical ⁇ mix storage device comprises the steps of: a) providing the electrochemical storage device, wherein the oxidizable and reducible material is provided in an amount such that by the reaction time for the fully ⁇ permanent oxidizing the material or complete reduction the material is defined as a short storage period; b) connecting the electrodes to the energy source for import of electrical energy until the storage short-term period is exceeded, so that the material is fully ⁇ constantly reduced and forms from exceeding the storage short time period fuel; c) connecting the Elect ⁇ clear to the energy consumer to export of electrical energy until the storage short time period is exceeded, so that the material is completely oxidized and forms Brennstoffpro ⁇ domestic product from exceeding the storage short time span; d) alternately repeating steps b) and c).
- the storage short time period is three stun ⁇ is.
- Figure 1 is a schematic representation of the imple mentation form of
- Storage device in the charging state and 2 shows the schematic representation of Figure 1 in the discharge state.
- a SpeI ⁇ cher adopted 1 to a rechargeable fuel cell.
- the memory device has a current direction switch (not shown) with which the fuel cell 2 is mutually connected to an energy source 3 for import 4 of electrical energy or to an energy consumer 9 for export 10 of electrical energy.
- the fuel cell 2 includes iron that is oxidized and reduced, and a redox couple formed by hydrogen and water vapor. Since the fuel cell has an operating temperature ⁇ ture of about 600 ° C, the water vapor does not condense out.
- the fuel cell further includes two electrodes (not shown ge ⁇ ) on.
- the fuel cell 2 has a discharging state, in which the iron is oxidized by the water vapor to iron oxide and hydrogen is formed, and a charging state, in which the iron oxide is reduced by the water ⁇ material and the water vapor.
- the electrodes are optionally either connected to the energy source 3 for importing 4 electrical energy, wherein the fuel cell 2 is in the charging state, or connected to a Energyverbrau ⁇ cher 9 for export 10 of electrical energy, wherein the Fuel cell 2 is in the discharge state.
- the fuel cell is powered by process gas, which is oxygen.
- an oxygen-ion flow is established between the electrodes, which is coupled via the redox couple hydrogen and water vapor and the iron.
- the oxygen-ion flow is reversed.
- the oxygen reacts with the hydrogen to form the water vapor.
- the water vapor becomes too passed the iron, which is oxidized to an iron oxide.
- the water vapor is reduced to hydrogen, which migrates back and again rea ⁇ giert with the oxygen, which also produces the water vapor.
- the current direction is reversed compared to the discharge state, so that the Re ⁇ action compared to the discharge state in the opposite direction, wherein the iron is reduced.
- the fuel cell is a solid oxide fuel cell having ei ⁇ ne with one of the electrodes electronically connected chamber (not shown).
- the chamber contains the iron or iron oxide as well as the hydrogen or water vapor.
- the chamber is a reservoir for the iron, which determines the amount of iron with the size of the chamber. The amount of iron results in the time necessary for the iron to be completely reduced in the charging state of the fuel cell 2 or to be completely oxidized in the discharge state.
- the procedure is as follows: It is to provide the storage device 1, wherein the iron is provided in the chamber in such an amount that the reaction time for completely oxidizing the iron or completely reducing the iron, a storage short period of preferred three hours is defined. Then, the electrodes of the memory device 1 are to be connected to the power source 3, the fuel cell 2 is operated in the charging state and imported electrical energy into the fuel cell 2 (arrow 4 in Figure 1). Within the short storage time span (arrow 5 in FIG. 1), ie below three hours, the iron in the fuel cell 2 is reduced (state 6 in FIG. 1). The iron is completely reduced until the short storage period has been reached. Until the memory ⁇ short period of time so the imported into the fuel cell 2, energy is stored in the form of the reduced iron. At the Exceeding the short storage time period and thereafter (arrow 7 in FIG. 1) hydrogen (state 8 in FIG. 1) forms in the fuel cell 2, by means of which the energy imported into the fuel cell 2 is stored.
- the electrodes are connected to the energy consumer 9 for export (arrow 10 in FIG. 2) of stored electrical energy.
- First (arrow 11 in Figure 2) oxidizing the iron to iron oxide (supply stand 12 in Figure 2), whereby the Ge in the fuel cell ⁇ stored energy is supplied to the energy consumer. 9
- This reaction takes as long until the memory ⁇ short period of time of three hours and reached the iron is oxidized to iron oxide completeness, ⁇ dig.
- steam is formed in the fuel cell (state 14 in FIG. 2), whereby the energy stored in the fuel cell is released to the energy consumer 9.
- the fuel cell 2 is alternately connected to the power source 3 and the power consumer 9, the fuel cell 2 is operated accordingly in the charging state and in the discharge state.
- the function of the fuel cell 2 is extended over the complete oxidation of the iron or the complete reducing the iron oxide addition.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112011104575T DE112011104575A5 (de) | 2010-12-22 | 2011-12-09 | Elektrochemische Speichereinrichtung zum Zwischenspeichern von elektrischer Energie und Verfahren zum Betreiben der Speichereinrichtung |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010063900.1 | 2010-12-22 | ||
DE102010063900 | 2010-12-22 | ||
EP11152648A EP2482373A1 (de) | 2011-01-31 | 2011-01-31 | Energiespeicher und Verfahren zum Entladen und Laden eines Energiespeichers |
EP11152648.9 | 2011-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012084548A1 true WO2012084548A1 (de) | 2012-06-28 |
Family
ID=45349183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/072284 WO2012084548A1 (de) | 2010-12-22 | 2011-12-09 | Elektrochemische speichereinrichtung zum zwischenspeichern von elektrischer energie und verfahren zum betreiben der speichereinrichtung |
Country Status (2)
Country | Link |
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DE (1) | DE112011104575A5 (de) |
WO (1) | WO2012084548A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5492777A (en) * | 1995-01-25 | 1996-02-20 | Westinghouse Electric Corporation | Electrochemical energy conversion and storage system |
WO2003001617A2 (en) * | 2001-06-25 | 2003-01-03 | Celltech Power, Inc. | Electrode layer arrangements in an electrochemical device |
US20050037245A1 (en) * | 2003-08-11 | 2005-02-17 | Evogy, Inc. | Method for hydrogen and electricity production using steam-iron process and solid oxide fuel cells |
-
2011
- 2011-12-09 DE DE112011104575T patent/DE112011104575A5/de not_active Withdrawn
- 2011-12-09 WO PCT/EP2011/072284 patent/WO2012084548A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5492777A (en) * | 1995-01-25 | 1996-02-20 | Westinghouse Electric Corporation | Electrochemical energy conversion and storage system |
WO2003001617A2 (en) * | 2001-06-25 | 2003-01-03 | Celltech Power, Inc. | Electrode layer arrangements in an electrochemical device |
US20050037245A1 (en) * | 2003-08-11 | 2005-02-17 | Evogy, Inc. | Method for hydrogen and electricity production using steam-iron process and solid oxide fuel cells |
Also Published As
Publication number | Publication date |
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DE112011104575A5 (de) | 2013-09-19 |
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