|Publication number||US3996064 A|
|Application number||US 05/606,891|
|Publication date||Dec 7, 1976|
|Filing date||Aug 22, 1975|
|Priority date||Aug 22, 1975|
|Publication number||05606891, 606891, US 3996064 A, US 3996064A, US-A-3996064, US3996064 A, US3996064A|
|Inventors||Lawrence H. Thaller|
|Original Assignee||The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (127), Classifications (12)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention was made by an employee of the United States Government and may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
Because of the energy crisis of the mid-1970's and due to economic factors within the electric utility industry, there is a need for storing bulk quantities of electrical power which might be produced intermittently or randomly by devices such as wind-driven generators, solar cells or the like. A number of methods have been considered including the storage of compressed air in large reservoirs, flywheels, capacitive storage, inductive storage and a number of electrochemical schemes. Electrochemical storage batteries are generally expensive and deteriorate when subject to discharge and recharge action.
To this date, only pumped water storage wherein water from a water storage pond at one level is directed to a water storage pond at a lower level through a hydroelectric plant having a water pumping capability has proven to be a viable method. Unfortunately, such facilities are limited to areas wherein the terrain is suitable for providing water sources at different elevations.
The electrically rechargeable REDOX flow cell system of the instant invention has a very high overall energy efficiency as compared to other systems and can be discharged more completely than secondary battery systems. Additionally, secondary battery systems are relatively expensive and the plates deteriorate when the batteries are repeatedly discharged and recharged.
It is an object of the invention to provide a bulk energy storage system of very high overall efficiency.
It is another object of the invention to provide an electrical energy storage system having an electrochemical cell member which does not deteriorate by being discharged and recharged.
Still another object of the invention is to provide an electrical bulk energy storage system which does not require high temperatures for operation.
It is yet another object of the invention to provide a bulk energy storage system including a REDOX cell and an intermittent source of electrical power which can supply electrical energy to a load into the cell and for pumping means circulate anode and cathode fluids through the cell whereby recharging takes place.
A further object of the invention is to provide a bulk energy storage system wherein anode and cathode fluids may be circulated through the REDOX cell under automatic control at predetermined times and conditions.
In summary, the invention provides a bulk energy electrical storage system wherein anode and cathode fluids are circulated through a REDOX cell to provide electrical power to a load and to cause recharging of the cell when voltage is supplied thereto from an intermittent or non-continuous electrical power source while the fluids are circulating.
FIG. 1 is a schematic drawing of an electrical system embodying the invention.
FIG. 2 is similar to FIG. 1 but some of the components have been eliminated.
FIG. 3 is a schematic showing more details of the electric cell of FIGS. 1 and 2.
Referring now to FIG. 1, there is shown an electrical system including an electric or voltage-producing cell 10 divided by an ion selective membrane 11 into a first compartment 12 and a second compartment 13. An inert electrode 14 is disposed in the first compartment 12 and produces a negative potential at a terminal 15. In a like manner, an inert electrode 16 is disposed in the second compartment 13 and produces a positive voltage at a terminal 17.
The difference of electric potential or voltage between the terminals 15 and 17 results from flowing an anode fluid containing a REDOX couple primarily in its reduced state through compartment 12. Similarly, a cathode fluid containing a REDOX couple primarily in its oxidized state flows through compartment 11. The electrochemical action and ion exchange process which take place in cell 10 to produce the voltage between terminals 15 and 17 will be explained after FIGS. 1, 2 and 3 have been described.
The anode fluid for compartment 12 flows from an anode fluid supply tank 18 through compartment 12 and into an anode fluid storage tank 19. After all of the anode fluid has passed from supply tank 18 into the anode storage tank 19, a pump 20 driven by an electric motor 21 pumps the anode fluid from storage tank 19 back to the anode fluid supply tank 18. Motor 21 is energized from the terminals 15 and 17 of cell 10.
Just as the anode fluid, cathode fluid flows from a cathode fluid supply tank 23 through the compartment 13 and into a cathode fluid storage tank 24 a pump 25 driven by an electric motor 26 pumps the cathode fluid back to supply tank 23 as indicated by arrow 27. Like motor 21, motor 26 is energized from terminals 15 and 17 of cell 10.
The purpose of the electrical system shown in FIG. 1 is to supply electrical power as needed to a load 28. This load is connected between the terminals 15 and 17 of cell 10. One side of load 28 is connected through a lead 29 to an intermittent or non-continuous electrical source 30 as, for example, a wind-driven generator. The other side of load 28 is connected through a switching circuit to the source 30.
To the end that the intermittent electrical source 30 may be disconnected from load 28, and consequently from the terminals 15 and 17, when there is little or no electrical power being generated by source 30, there is provided a sensing circuit 32 having an input connected to source 30 and an output connected via a lead 33 to the input of switching circuit 31 and via a lead 34 to a first input of a motor control 35. An output of the motor control 35 is connected via leads 36 to motors 21 and 26. When the output voltage of source 30 drops below a predetermined value, sensing circuit 32 causes switching circuit 31 to open, thereby disconnecting load 28 and the terminals 15 and 17 from source 30.
To prevent cell 10 from becoming completely discharged, there is provided a voltage monitor having an input connected by leads 38 and 39 to terminals 15 and 17, respectively, and an output connected via a lead 40 to a second input of motor control 35. Thus, when the cell voltage, as manifested at terminals 15 and 17, drops below a predetermined value, voltage monitor 37 signals motor control 35 to inactivate motors 21 and 26.
Sensing circuit 32 signals motor control 35 via lead 34 when source 30 has sufficient electrical voltage to charge cell 10. This signal overrides the signal from voltage monitor 37 so that the pumps 21 and 26 will circulate the anode and cathode fluids when charging voltage is available.
The electrical system shown in FIG. 2 is similar to that shown in FIG. 1 and corresponding parts are identified by corresponding numerals. In the system shown in FIG. 2, the storage tanks 19 and 24 have been eliminated, together with the voltage monitor and the motor control. With this arrangement, motors 21 and 26 run continuously. However, the sensing circuit 32, if desired, may function as in FIG. 1 to disconnect the intermittent electrical source 30 from load 28 and terminals 15 and 17 when its voltage drops below a predetermined magnitude.
While FIGS. 2 and 3 show the fluid supply tanks 18 and 23 positioned higher than cell 10, this is not necessarily true as to the actual physical location. There is some advantage to locating the supply tanks 18, 23 and the storage tanks 19, 24 above and below cell 10, respectively. With such an arrangement, fluid will flow by gravity through cell 10 even though pumps 21 and 26 are inoperative. However, FIG. 2 does not rely on gravity as the pumps continuously circulate the anode and cathode fluids.
Referring now to FIG. 3, the voltage cell 10 is shown in greater detail than in FIGS. 1 and 2. Parts corresponding to those of cell 10 in FIGS. 1 and 2 are identified by like numerals. As shown, cell 10 comprises a container 41 which may be of plastic, hard rubber or the like divided into first and second compartments by an ion selective membrane 11. Electrodes 14 and 16 disposed in the first and second compartments, respectively, may be graphite felt pads which are inert to the anode and cathode fluids. Voltage and current are provided for terminals 15 and 17 by graphite foils 42 and 43 which contact the electrodes 14 and 16, respectively.
The inert electrodes may also be graphite foils, cloths or felts, or platinized metal screens of the type used in fuel cells. In general, the electrodes must be inert to electrochemical or chemical reaction with the anode cathode fluids while promoting the REDOX reaction on their surfaces. They must also be porous electronic conductors.
The system of FIG. 2 is preferred slightly to that of FIG. 1 because it is simpler and more efficient. If both systems were to cycle between 5 and 95 percent depth of discharge, the open circuit voltage would vary between 1.334 and 1.032, assuming the cells 10 are identical and the couples are Fe+ 3 /Fe+ 2 and Cr+ 2 /Cr+ 3. With the arrangement of FIG. 2 and continuously flowing fluids, the cell voltage under load would gradually decrease from the upper to the lower limit (neglecting IR and polarization losses).
With the system of FIG. 1 the voltage would be nearly constant and closer to the lower limit as the fluids flow from the supply tanks 18 and 23 to the storage tanks 19 and 24, respectively.
Factors which must be considered regarding the electrodes 14 and 16, membrane 11 and the anode and cathode fluids which contain reduced and oxidized species dissolved in a solvent will now be discussed. The preferred solvent is water.
The selection of electrode materials for an electrically rechargeable redox flow cell involves several simple criteria:
1. Both the oxidized and reduces species must be soluble.
2. The oxidation and reduction potentials of the different species must be such that the solvent will remain inert during charging as well as on stand.
3. Oxygen containing or demanding ions (e.g., MnO4, Cr+ 3) should be avoided to simplify hydrogen ion management problems.
4. Complexed ions (e.g., Fe(CN)6 - 4) should be avoided to minimize overall system weight.
The first criterion simply encompasses the classical type of redox electrode such as the ferrous/ferric couple in a chloride solution.
Fe+ 2 →Fe+ 3 + e- 1.
Here both the chlorides are highly soluble and the inert electrode does not become fouled or complicated by the presence of insoluble species. Charge neutrality is maintained by the diffusion into or out of the half cell compartment of some other type of ion (i.e., H+ or Cl-).
The second criterion deals with the requirement of maintaining the solvent as a neutral species during charge, stand, and discharge. If water is the solvent, ions above hydrogen in the list of oxidation/reduction potentials should be avoided (Cr+ 2, V+ 2, Ti+ 2), since hydrogen could be displaced. On the other end of the scale, ions such as Co+ 3, Ce+ 4, and Mn+ 4 could possibly displace oxygen from solution. Care must also be exercised during the charging process where the overpotentials applied could lead to the simultaneous discharge of solvent fragments along with the desired ions.
Criterion three comes into consideration when the overall charge balance and ion management schemes are arranged. Consider the permanganate ion reduction.
MnO4 - + 8H+ + 5e-→4H2 O + Mn+ 2 2.
Eight hydrogen ions are required for this half cell reaction. In a complete system, large amounts of acid would be required and pH changes would be large. This may be contrasted with the ferrous/ferric half cell reaction (1) which requires no hydrogen ions. The fourth criterion is an extension of the third. The ferri/ferro cyanide couple will serve as an illustration.
Fe(CN)6 - 4 →Fe(CN)6 - 3 + e-3.
Fe+ 2 →Fe+ 3 + e- 1.
Although the above pair of half cell reactions meet the first three criteria, the equivalent weight of the cyanide complex is 272 as opposed to 56 for the noncomplexed iron. Thus, from an energy density standpoint the use of complexed ions is not desirable.
The requirements and options in regard to the membrane that is used to separate the anode and cathode fluids can be illustrated by considering a simple redox cell system with the reactions written in the discharge direction.
Anode compartment; A+ 1 →A+ 2 + e-
Cathode compartment; C+ 2 + e-→C+ 1
the membrane must provide an impermeable barrier to both the A and C ions in both states of charge. Further, it must provide the means by which charge neutralization is maintained. During discharge either positive ions (H+, for example) must move from the anode compartment through the membrane to the cathode compartment or negative ions (C1-, for example) must move from the cathode compartment to the anode compartment. There is an inherent disadvantage from an energy standpoint in moving positive ions from the anode compartment during discharge as opposed to the other option. The iron/chromium system will be used to illustrate this. An ideal hydrogen ion transport membrane and an ideal chloride ion transport membrane will be used in the illustration.
______________________________________Case 1. - H+ membraneBefore discharge After discharge ##STR1## ##STR2##Case 2. - Cl- membraneBefore discharge After discharge ##STR3## ##STR4##______________________________________
In Case 1 as compared to Case 2, 1 mole of HCl is required per Faraday over and above any acid that may be required for pH adjustment needed for solution stabilization. In addition, an anion membrane would most likely have a better selectivity for preventing cross diffusion of the redox ions. Cross diffusion of such ions would represent a permanent loss of system capacity.
Redox couples which preclude the electrolysis of water during discharge of the cell must be used. The anode and cathode fluids are respective solutions between 1 and 4 molar.
The anode fluid preferably contains water as a solvent having dissolved therein a chloride salt selected from the group consisting of titanium chloride, chromium chloride, tin chloride, vanadium chloride, manganese chloride and cerium chloride whereby cations in a reduced state are produced. The cathode fluid preferably contains water as a solvent having dissolved therein a chloride salt selected from the group consisting of iron chloride, chromium chloride, vanadium chloride, manganese chloride, and cerium chloride whereby cations in an oxidized state are produced.
It will be understood that changes and modifications may be made to the above-described invention without departing from the spirit and scope thereof as set forth in the claims appended hereto.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3009327 *||Mar 21, 1960||Nov 21, 1961||Inst Gas Technology||Absorption cooling cycle|
|US3360401 *||Sep 29, 1965||Dec 26, 1967||Standard Oil Co||Process for converting chemical energy into electrical energy|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4117204 *||Dec 1, 1977||Sep 26, 1978||General Engineering Labs.||Sulfite anolyte and persulfate catholyte fuel cell|
|US4133941 *||Mar 10, 1977||Jan 9, 1979||The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration||Formulated plastic separators for soluble electrode cells|
|US4159366 *||Jun 9, 1978||Jun 26, 1979||The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration||Electrochemical cell for rebalancing redox flow system|
|US4192910 *||Nov 29, 1978||Mar 11, 1980||Nasa||Catalyst surfaces for the chromous/chromic redox couple|
|US4200684 *||Nov 24, 1978||Apr 29, 1980||P. R. Mallory & Co. Inc.||High rate discharge primary battery|
|US4270984 *||Jul 27, 1979||Jun 2, 1981||Nasa||Catalyst surfaces for the chromous/chromic REDOX couple|
|US4309372 *||Nov 3, 1977||Jan 5, 1982||Method of making formulated plastic separators for soluble electrode cells|
|US4370392 *||Jun 8, 1981||Jan 25, 1983||The University Of Akron||Chrome-halogen energy storage device and system|
|US4382116 *||May 22, 1981||May 3, 1983||Zirconium carbide as an electrocatalyst for the chromous/chromic REDOX couple|
|US4399200 *||Nov 5, 1981||Aug 16, 1983||Energy Development Associates, Inc.||Device for controlling a pump in a storage battery|
|US4454649 *||Feb 26, 1982||Jun 19, 1984||Chromium electrodes for REDOX cells|
|US4485154 *||Sep 8, 1981||Nov 27, 1984||Institute Of Gas Technology||Electrically rechargeable anionically active reduction-oxidation electrical storage-supply system|
|US4576878 *||Jun 25, 1985||Mar 18, 1986||Method and apparatus for rebalancing a redox flow cell system|
|US4578249 *||Sep 2, 1983||Mar 25, 1986||International Minerals & Chemical Corp.||Process for recovery of uranium from wet process H3 PO4|
|US4786567 *||Jan 12, 1988||Nov 22, 1988||Unisearch Limited||All-vanadium redox battery|
|US4882241 *||Oct 19, 1988||Nov 21, 1989||Siemens Aktiengesellschaft||Redox battery|
|US5061578 *||Oct 24, 1986||Oct 29, 1991||Kabushiki Kaisha Meidensha||Electrolyte circulation type secondary battery operating method|
|US5316643 *||Jul 2, 1992||May 31, 1994||Fraunhofer Gesellschaft Zur Forderung Der Angewandten Forschund E.V.||Apparatus for the storage and conversion of energy|
|US5318865 *||Jun 2, 1992||Jun 7, 1994||Director-General, Agency Of Industrial Science And Technology||Redox battery|
|US6005183 *||Dec 20, 1996||Dec 21, 1999||Ebara Corporation||Device containing solar cell panel and storage battery|
|US6558833||Dec 18, 2000||May 6, 2003||Mccoy Reginald F.H.||Recharging batteries by electrolyte transfer|
|US6692862 *||Mar 31, 2000||Feb 17, 2004||Squirrel Holdings Ltd.||Redox flow battery and method of operating it|
|US7227275||Feb 1, 2005||Jun 5, 2007||Vrb Power Systems Inc.||Method for retrofitting wind turbine farms|
|US7265456||Jan 14, 2005||Sep 4, 2007||Vrb Bower Systems Inc.||Power generation system incorporating a vanadium redox battery and a direct current wind turbine generator|
|US7320844||Aug 26, 2002||Jan 22, 2008||Newsouth Innovations Pty Limited||Vanadium/polyhalide redox flow battery|
|US7353083||Jan 14, 2005||Apr 1, 2008||Vrb Power Systems Inc.||Vanadium redox battery energy storage and power generation system incorporating and optimizing diesel engine generators|
|US7682728||Aug 25, 2008||Mar 23, 2010||Jd Holding Inc.||Electrochemical battery incorporating internal manifolds|
|US7718047||Oct 18, 2005||May 18, 2010||The Regents Of The University Of Colorado||Electrochemical high pressure pump|
|US7820321 *||Oct 26, 2010||Enervault Corporation||Redox flow battery system for distributed energy storage|
|US7855005||Feb 12, 2007||Dec 21, 2010||Deeya Energy, Inc.||Apparatus and methods of determination of state of charge in a redox flow battery|
|US7919204||Oct 9, 2009||Apr 5, 2011||Deeya Energy, Inc.||Thermal control of a flow cell battery|
|US7927731||Apr 19, 2011||Deeya Energy, Inc.||Redox flow cell|
|US7976974||Jul 12, 2011||Newsouth Innovations Pty Limited||Vanadium halide redox flow battery|
|US8230736||Oct 9, 2009||Jul 31, 2012||Deeya Energy, Inc.||Level sensor for conductive liquids|
|US8231993||Jul 31, 2012||Deeya Energy, Inc.||Flexible multi-walled tubing assembly|
|US8236463||Oct 8, 2009||Aug 7, 2012||Deeya Energy, Inc.||Magnetic current collector|
|US8264202||Oct 9, 2009||Sep 11, 2012||Deeya Energy, Inc.||Method and apparatus for determining state of charge of a battery using an open-circuit voltage|
|US8277964||Oct 2, 2012||Jd Holding Inc.||System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system|
|US8338008||Dec 25, 2012||Deeya Energy, Inc.||Electrolyte compositions|
|US8349477||Jan 8, 2013||Deeya Energy, Inc.||Optical leak detection sensor|
|US8394529||Mar 12, 2013||Deeya Energy, Inc.||Preparation of flow cell battery electrolytes from raw materials|
|US8541121 *||Jan 13, 2011||Sep 24, 2013||Deeya Energy, Inc.||Quenching system|
|US8551299||May 28, 2010||Oct 8, 2013||Deeya Energy, Inc.||Methods of producing hydrochloric acid from hydrogen gas and chlorine gas|
|US8587150||Feb 28, 2008||Nov 19, 2013||Deeya Energy, Inc.||Method and modular system for charging a battery|
|US8587255||May 28, 2010||Nov 19, 2013||Deeya Energy, Inc.||Control system for a flow cell battery|
|US8628880||Sep 28, 2010||Jan 14, 2014||Battelle Memorial Institute||Redox flow batteries based on supporting solutions containing chloride|
|US8709629 *||Dec 22, 2010||Apr 29, 2014||Jd Holding Inc.||Systems and methods for redox flow battery scalable modular reactant storage|
|US8722227||Aug 26, 2013||May 13, 2014||Massachusetts Institute Of Technology||High energy density redox flow device|
|US8723371 *||Aug 30, 2010||May 13, 2014||Tessa Durakis Green||Systems and methods for storing and/or transmitting electrical energy|
|US8723489||May 28, 2010||May 13, 2014||Deeya Energy, Inc.||Bi-directional buck-boost circuit|
|US8771856||Sep 28, 2010||Jul 8, 2014||Battelle Memorial Institute||Fe-V redox flow batteries|
|US8778552||Apr 6, 2010||Jul 15, 2014||24M Technologies, Inc.||Fuel system using redox flow battery|
|US8785023||Jan 7, 2011||Jul 22, 2014||Enervault Corparation||Cascade redox flow battery systems|
|US8877365 *||May 28, 2010||Nov 4, 2014||Deeya Energy, Inc.||Redox flow cell rebalancing|
|US8883297||Oct 9, 2009||Nov 11, 2014||Imergy Power Systems, Inc.||Methods for bonding porous flexible membranes using solvent|
|US8906529||Sep 16, 2010||Dec 9, 2014||Enervault Corporation||Redox flow battery system for distributed energy storage|
|US8916281||Mar 28, 2012||Dec 23, 2014||Enervault Corporation||Rebalancing electrolytes in redox flow battery systems|
|US8927125||Sep 20, 2013||Jan 6, 2015||Imergy Power Systems, Inc.||Quenching system|
|US8951665||Mar 10, 2010||Feb 10, 2015||Imergy Power Systems, Inc.||Methods for the preparation of electrolytes for chromium-iron redox flow batteries|
|US8980484||Mar 28, 2012||Mar 17, 2015||Enervault Corporation||Monitoring electrolyte concentrations in redox flow battery systems|
|US8993159||Apr 29, 2013||Mar 31, 2015||24M Technologies, Inc.||Semi-solid electrodes having high rate capability|
|US9035617||Nov 18, 2013||May 19, 2015||Imergy Power Systems, Inc.||Control system for a flow cell battery|
|US9077011||Apr 24, 2014||Jul 7, 2015||Battelle Memorial Institute||Redox flow batteries based on supporting solutions containing chloride|
|US9123931||Dec 13, 2013||Sep 1, 2015||Battelle Memorial Institute||Redox flow batteries based on supporting solutions containing chloride|
|US9184464||Jan 15, 2015||Nov 10, 2015||24M Technologies, Inc.||Semi-solid electrodes having high rate capability|
|US9269982||Jan 13, 2012||Feb 23, 2016||Imergy Power Systems, Inc.||Flow cell stack|
|US9281535||Aug 12, 2010||Mar 8, 2016||Imergy Power Systems, Inc.||System dongle|
|US9293781||Aug 12, 2015||Mar 22, 2016||24M Technologies, Inc.||Fuel system using redox flow battery|
|US9300000 *||Feb 28, 2012||Mar 29, 2016||Uchicago Argonne, Llc||Organic non-aqueous cation-based redox flow batteries|
|US9340436||Apr 16, 2013||May 17, 2016||Palo Alto Research Center Incorporated||Sea water desalination system|
|US20040234843 *||Aug 26, 2002||Nov 25, 2004||Maria Skyllas-Kazacos||Vanadium/polyhalide redox flow battery|
|US20050156431 *||Jan 14, 2005||Jul 21, 2005||Hennessy Timothy D.J.||Vanadium redox battery energy storage and power generation system incorporating and optimizing diesel engine generators|
|US20050244707 *||Apr 23, 2003||Nov 3, 2005||Maria Skyllas-Kazacos||Metal halide redox flow battery|
|US20060171086 *||Feb 1, 2005||Aug 3, 2006||Vrb Power Systems Inc.||Method for retrofitting wind turbine farms|
|US20060183016 *||Mar 15, 2004||Aug 17, 2006||Michael Kazacos||Novel vanadium halide redox flow battery|
|US20060207883 *||Oct 18, 2005||Sep 21, 2006||Koval Carl A||Electrochemical high pressure pump|
|US20070072067 *||Sep 23, 2005||Mar 29, 2007||Vrb Power Systems Inc.||Vanadium redox battery cell stack|
|US20080193828 *||Feb 12, 2007||Aug 14, 2008||Saroj Kumar Sahu||Apparatus and Methods of Determination of State of Charge in a Redox Flow Battery|
|US20090218984 *||Feb 28, 2008||Sep 3, 2009||Deeya Energy, Inc.||Battery charger|
|US20100003545 *||Jul 6, 2009||Jan 7, 2010||Enervault Corporation||Redox Flow Battery System for Distributed Energy Storage|
|US20100003586 *||Jul 1, 2008||Jan 7, 2010||Deeya Energy, Inc. A California C-Corp||Redox flow cell|
|US20100089480 *||Oct 9, 2009||Apr 15, 2010||Saroj Kumar Sahu||Flexible Multi-Walled Tubing Assembly|
|US20100090651 *||Oct 9, 2009||Apr 15, 2010||Deeya Energy Technologies, Inc.||Method and apparatus for determining state of charge of a battery|
|US20100092757 *||Oct 9, 2009||Apr 15, 2010||Deeya Energy Technologies, Inc.||Methods for Bonding Porous Flexible Membranes Using Solvent|
|US20100092807 *||Oct 8, 2009||Apr 15, 2010||Saroj Kumar Sahu||Magnetic Current Collector|
|US20100092813 *||Oct 9, 2009||Apr 15, 2010||Saroj Kumar Sahu||Thermal Control of a Flow Cell Battery|
|US20100092843 *||Oct 8, 2009||Apr 15, 2010||Deeya Energy Technologies, Inc.||Venturi pumping system in a hydrogen gas circulation of a flow battery|
|US20100094468 *||Oct 9, 2009||Apr 15, 2010||Deeya Energy, Incorporated||Level Sensor for Conductive Liquids|
|US20100261070 *||Mar 10, 2010||Oct 14, 2010||Deeya Energy, Inc.||Methods for the preparation of electrolytes for chromium-iron redox flow batteries|
|US20100323264 *||Apr 6, 2010||Dec 23, 2010||A123 Systems, Inc.||Fuel system using redox flow battery|
|US20110048800 *||Mar 3, 2011||Tessa Durakis Green||Systems and Methods for Storing and/or Transmitting Electrical Energy|
|US20110070483 *||Mar 24, 2011||Majid Keshavarz||Preparation of flow cell battery electrolytes from raw materials|
|US20110074357 *||Mar 31, 2011||Parakulam Gopalakrishnan R||Control system for a flow cell battery|
|US20110076526 *||Mar 31, 2011||Ge Zu||Electrolyte compositions|
|US20110079074 *||Apr 7, 2011||Saroj Kumar Sahu||Hydrogen chlorine level detector|
|US20110080143 *||Apr 7, 2011||Parakulam Gopalakrishnan R||Buck-boost circuit|
|US20110081561 *||May 28, 2010||Apr 7, 2011||Majid Keshavarz||Methods of producing hydrochloric acid from hydrogen gas and chlorine gas|
|US20110081562 *||May 28, 2010||Apr 7, 2011||Parakulam Gopalakrishnan R||Optical leak detection sensor|
|US20110086247 *||May 28, 2010||Apr 14, 2011||Majid Keshavarz||Redox flow cell rebalancing|
|US20110200848 *||Aug 18, 2011||Massachusetts Institute Of Technology||High energy density redox flow device|
|US20110200890 *||Feb 17, 2010||Aug 18, 2011||Kocherginsky Nikolai M||Redox membrane-based flow fuel cell|
|US20120164498 *||Dec 22, 2010||Jun 28, 2012||Jd Holding Inc.||Systems and methods for redox flow battery scalable modular reactant storage|
|US20120183816 *||Jul 19, 2012||Deeya Energy, Incorporated||Quenching system|
|US20130224538 *||Feb 28, 2012||Aug 29, 2013||Uchicago Argonne Llc||Organic non-aqueous cation-based redox flow batteries|
|CN101997129B||Aug 27, 2009||Sep 18, 2013||中国科学院金属研究所||Liquid flow battery|
|CN102089918B *||Jul 7, 2009||May 6, 2015||伊奈沃特公司||Redox flow battery system for distributed energy storage|
|CN102263280A *||Jun 28, 2011||Nov 30, 2011||中国科学院物理研究所||一种液流水系可充碱金属离子电池|
|CN102544563A *||Dec 9, 2010||Jul 4, 2012||中国科学院大连化学物理研究所||Zinc-deposition type liquid flow energy-storage battery system and running way thereof|
|CN102544563B||Dec 9, 2010||Mar 26, 2014||大连融科储能技术发展有限公司||Zinc-deposition type liquid flow energy-storage battery system and running way thereof|
|CN102832363A *||Dec 29, 2011||Dec 19, 2012||马志啟||Application of anion exchange membrane in Fe-Cr system liquid fluid battery|
|CN102832363B *||Dec 29, 2011||Mar 2, 2016||苏州久润能源科技有限公司||阴离子交换膜在铁-铬系液相流体电池中的应用|
|CN104134814A *||Jul 18, 2014||Nov 5, 2014||华南理工大学||High-specific-energy flow cell anode electrolyte, and preparation method and application of electrolyte|
|DE102012015176A1||Aug 2, 2012||Feb 6, 2014||Technische Universität Braunschweig Carolo-Wilhelmina||Use of metal-free organonitrogen compound as redox-active substance used in redox electrolyte for energy storage accumulator, fuel cell and redox flow battery, contains two five- or six- diatomic annealed rings|
|DE102012024753A1||Dec 19, 2012||Jun 26, 2014||Eisenhuth Gmbh & Co. Kg||Frame with integrated bipolar plate for electrochemical reactors, consists of electrically conductive bipolar plate(s) of thermoformable carbon-polymer composite material with thermoplastic polymer providing liquid-tight connection|
|DE102014011589A1 *||Aug 1, 2014||Feb 4, 2016||Danger Möricke||Energieaktivierungen für fernreiseluftschiffe|
|EP0517217A1 *||Jun 4, 1992||Dec 9, 1992||Director-General Of The Agency Of Industrial Science And Technology||Redox battery|
|EP1385226A1 *||Apr 24, 2002||Jan 28, 2004||Sumitomo Electric Industries, Ltd.||Secondary cell and method of operating the secondary cell|
|EP1425807A1 *||Aug 23, 2002||Jun 9, 2004||Unisearch Limited||Vanadium / polyhalide redox flow battery|
|EP1618624A1 *||Mar 15, 2004||Jan 25, 2006||Limited Unisearch||Novel vanadium halide redox flow battery|
|EP2622674A1 *||Jun 8, 2011||Aug 7, 2013||Battelle Memorial Institute||Fe-v redox flow batteries|
|EP2622675A1 *||Jun 8, 2011||Aug 7, 2013||Battelle Memorial Institute||Redox flow batteries based on supporting solutions containing chloride|
|WO1980001221A1 *||Nov 20, 1979||Jun 12, 1980||Nasa||Catalytic surface for redox cell electrode|
|WO1989005528A1 *||Dec 9, 1988||Jun 15, 1989||Unisearch Limited||Vanadium charging cell and vanadium dual battery system|
|WO2002048430A2 *||Sep 20, 2001||Jun 20, 2002||Innovative Technology Licensing, Llc.||Oxide-reducing agent composition, system and process|
|WO2002048430A3 *||Sep 20, 2001||Apr 10, 2003||Innovative Tech Licensing Llc||Oxide-reducing agent composition, system and process|
|WO2002091512A1||Apr 24, 2002||Nov 14, 2002||Sumitomo Electric Industries,Ltd.||Secondary cell and method of operating the secondary cell|
|WO2013097594A1 *||Dec 10, 2012||Jul 4, 2013||Ma Zhiqi||Use of anion-exchange membrane in iron-chromium liquid fluid battery|
|U.S. Classification||320/128, 320/135, 429/432, 429/418, 429/513|
|International Classification||H01M10/42, H01M8/18|
|Cooperative Classification||Y02E60/528, H01M8/188, H01M10/42|
|European Classification||H01M8/18C4, H01M10/42|