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Title: Rebalancing electrolytes in redox flow battery systems

Embodiments of redox flow battery rebalancing systems include a system for reacting an unbalanced flow battery electrolyte with a rebalance electrolyte in a first reaction cell. In some embodiments, the rebalance electrolyte may contain ferrous iron (Fe.sup.2+) which may be oxidized to ferric iron (Fe.sup.3+) in the first reaction cell. The reducing ability of the rebalance reactant may be restored in a second rebalance cell that is configured to reduce the ferric iron in the rebalance electrolyte back into ferrous iron through a reaction with metallic iron.
Issue Date:
OSTI Identifier:
Enervault Corporation (Sunnyvale, CA) NETL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2012 Mar 28
Research Org:
Enervault Corporation, Sunnyvale, CA (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Electrically rechargeable REDOX flow cell
patent, December 1976

Gels as battery separators for soluble electrode cells
patent, April 1977

Electrochemical cell for rebalancing redox flow system
patent, June 1979

Catalyst surfaces for the chromous/chromic redox couple
patent, March 1980

Chrome-halogen energy storage device and system
patent, January 1983

Zirconium carbide as an electrocatalyst for the chromous/chromic REDOX couple
patent, May 1983

Redox battery including a bromine positive electrode and a chromium ion negative electrode, and method
patent, September 1984

Electrically rechargeable anionically active reduction-oxidation electrical storage-supply system
patent, November 1984

Method and apparatus for rebalancing a redox flow cell system
patent, March 1986

Metal-halogen energy storage device and system
patent, November 1988

All-vanadium redox battery
patent, November 1988

Electrolytes for redox flow batteries
patent, March 1989

Apparatus and method for regenerating electrolyte of a redox flow battery
patent, September 1990

Electrolyte circulation type secondary battery operating method
patent, October 1991

End block constructions for batteries
patent, May 1994

Redox battery
patent, June 1994

Module for an aqueous battery system
patent, February 1997

Compact energy storage system
patent, March 1997

Process for energy storage and/or power delivery with means for restoring electrolyte balance
patent, April 1994

Method of electrode reconditioning
patent, July 1997

Redox battery
patent, August 1997

Liquid-circulating battery
patent, June 1998

Stabilized electrolyte solutions, methods of preparation thereof and redox cells and batteries containing stabilized electrolyte solutions
patent, November 2000

Battery circulation system with improved four-way valve
patent, June 2001

Spill and leak containment system for zinc-bromine battery
patent, July 2001

Recombinator for the re-acidification of an electrolyte stream in a flowing electrolyte zinc-bromine battery
patent, September 2002

High energy density vanadium electrolyte solutions, methods of preparation thereof and all-vanadium redox cells and batteries containing high energy vanadium electrolyte solutions
patent, October 2002

Redox flow battery system and cell stack
patent, November 2002

A system for generating and consuming borohydride ions comprising two electrochemical cells. At least one of the cells is configured for installation on a vehicle that is propelled by electricity
patent, December 2002

Membrane-separated, bipolar multicell electrochemical reactor
patent, April 2003

Stabilized vanadium electrolyte solutions for all-vanadium redox cells and batteries
patent, May 2003

Redox flow battery
patent, July 2004

Modified vanadium compound, producing method thereof, redox flow battery electrolyte composite and redox flow battery electrolyte producing method
patent, March 2005

Battery with bifunctional electrolyte
patent, January 2006

High energy density vanadium electrolyte solutions, methods of preparation thereof and all-vanadium redox cells and batteries containing high energy vanadium electrolyte solutions
patent, July 2006

Load leveling battery and methods therefor
patent, September 2007

Battery with gelled electrolyte
patent, November 2007

Vanadium/polyhalide redox flow battery
patent, January 2008

Flowing electrolyte battery with electric potential neutralization
patent, November 2011

Four-way valve for battery circulation system
patent-application, December 2001

High energy density vanadium electrolyte solutions, methods of preparation thereof and all-vanadium redox cells and batteries containing high energy vanadium electrolyte solutions
patent-application, July 2003

Vanadium redox battery electrolyte
patent-application, December 2004

System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system
patent-application, July 2005

Metal halide redox flow battery
patent-application, November 2005

Battery with bifunctional electrolyte
patent-application, March 2006

Novel vanadium halide redox flow battery
patent-application, August 2006

Apparatus and Methods of Determination of State of Charge in a Redox Flow Battery
patent-application, August 2008

Perfluorinated Membranes and Improved Electrolytes for Redox Cells and Batteries
patent-application, November 2008

Secondary Battery, Power Supply System Using Same and Usage of Power Supply System
patent-application, January 2009

Sodium ion based aqueous electrolyte electrochemical secondary energy storage device
patent-application, October 2009

Wind Power Generation System Of A Type Provided With Power Storage System
patent-application, December 2009

High Energy Density Redox Flow Device
patent-application, February 2010

Electrode for a Charge Storage Device and Method of Manufacture
patent-application, September 2010

Metal-Air Low Temperature Ionic Liquid Cell
patent-application, November 2010

Fuel System Using Redox Flow Battery
patent-application, December 2010

Redox Flow Battery System for Distributed Energy Storage
patent-application, February 2011

Redox Flow Cell Rebalancing
patent-application, April 2011

High Energy Density Redox Flow Device
patent-application, August 2011

Metal-Air Cell With Performance Enhancing Additive
patent-application, November 2011

Tuned Hydrophobicity
patent-application, December 2011

Fe-V Redox Flow Batteries
patent-application, March 2012

Redox Flow Batteries Based on Supporting Solutions Containing Chloride
patent-application, March 2012

Electrochemical Energy Storage Systems and Methods
patent-application, March 2012

Method for Storing Electrical Energy in Ionic Liquids
patent-application, May 2012

Redox Flow Battery
patent-application, May 2012

Rebalancing Electrolytes In Redox Flow Battery Systems
patent-application, April 2013

Synthesis of carbon nanotubes in graphite microchannels in gas-flow and submerged-in-liquid reactors
journal, August 2010

Modification of Daramic, microporous separator, for redox flow battery applications
journal, December 1992
  • Chieng, S. C.; Kazacos, M.; Skyllas-Kazacos, M.
  • Journal of Membrane Science, Vol. 75, Issue 1-2, p. 81-91
  • DOI: 10.1016/0376-7388(92)80008-8

Development of a 0.1 kW power accumulation pilot plant based on an Fe/Cr redox flow battery Part I. Considerations on flow-distribution design
journal, March 1994

Development of bipolar plates for fuel cells from graphite filled wet-lay material and a thermoplastic laminate skin layer
journal, March 2007

Synthesis of nanosized zirconium carbide by a sol–gel route
journal, January 2007
  • Dollé, Mickael; Gosset, Dominique; Bogicevic, Christine
  • Journal of the European Ceramic Society, Vol. 27, Issue 4, p. 2061-2067
  • DOI: 10.1016/j.jeurceramsoc.2006.06.005

Reticulated vitreous carbon as an electrode material
journal, January 2004

The influence of oxidative pretreatment of graphite electrodes on the catalysis of the Cr3+Cr2+ and Fe3+Fe2+ redox reactions
journal, January 1985

Possible use of vanadium redox-flow batteries for energy storage in small grids and stand-alone photovoltaic systems
journal, March 2004

Optimization studies on a Fe/Cr redox flow battery
journal, January 1992

Bipolar plates for PEM fuel cells
journal, May 2003

Overcharge in the vanadium redox battery and changes in electrical resistivity and surface functionality of graphite-felt electrodes
journal, November 1994

Injection moulding of graphite composite bipolar plates
journal, March 2006

Redox flow cells for energy conversion
journal, September 2006
  • Ponce de Leon, C.; Frias-Ferrer, A.; Gonzalez-Garcia, J.
  • Journal of Power Sources, Vol. 160, Issue 1, p. 716-732
  • DOI: 10.1016/j.jpowsour.2006.02.095

A dynamic performance model for redox-flow batteries involving soluble species
journal, November 2008

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