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  • Mixing arrangement for a flow cell of an energy storage system
    Patent number: 9184454
    Abstract: An energy storage system according to the present disclosure includes a cell and an electrolyte supply arrangement for supplying an electrolyte to the cell. The cell has a flow chamber, an electrode and a mixing arrangement positioned in the flow chamber proximate the electrode. The mixing arrangement includes a plurality of ramps that each extend at an angle with respect to the electrode, and each respective ramp defines a void space between the respective ramp and the electrode. Furthermore, the ramps and the void spaces are configured to facilitate mixing of the electrolyte in the flow chamber.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 10, 2015
    Assignee: VIZN ENERGY SYSTEMS, INCORPORATED
    Inventors: Steven L. Peace, Gerald P. Backer
  • Perforated electrode plate
    Patent number: 9276266
    Abstract: An energy storage includes a cell that defines a flow chamber for receiving electrolyte, and an electrode arrangement positioned in the cell. The electrode arrangement includes a plate having first and second sides. The plate further has multiple openings that vary in size to facilitate electrolyte flow on both sides of the plate.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 1, 2016
    Assignee: VIZN ENERGY SYSTEMS, INCORPORATED
    Inventors: Derek C. Tarrant, Paul A. Trudeau, Jr.
  • Electrode configured for turbulence
    Patent number: 8974940
    Abstract: An energy storage system includes a cell having a flow chamber for receiving electrolyte, and an electrode positioned in the cell. The electrode includes a base plate having a generally planar portion and a plurality of partially cutout portions partially cut out from the generally planar portion to define a plurality of openings in the base plate. Each cutout portion is attached to the generally planar portion and has a projecting part that extends away from the generally planar portion. Furthermore, the openings and the cutout portions are configured to enhance mixing of the electrolyte when the electrolyte is received in the flow chamber.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 10, 2015
    Assignee: Vizn Energy Systems, Inc.
    Inventor: Derek C. Tarrant
  • FLOW CELL WITH SHUNT CURRENT COUNTER ELECTRODE
    Publication number: 20150244008
    Abstract: Counter electrodes are used within the context of a flow cell to attract shunt current depositions during operation. The counter electrodes may be electrically connected with an anode of the flow cell to attract the depositions and then electrically connected with a cathode of the flow cell to remove the depositions.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 27, 2015
    Applicant: ViZn Energy Systems, Inc.
    Inventors: Derek C. Tarrant, Richard M. Bendert, Gerald P. Backer
  • Flow cell with shunt current counter electrode
    Patent number: 9373861
    Abstract: Counter electrodes are used within the context of a flow cell to attract shunt current depositions during operation. The counter electrodes may be electrically connected with an anode of the flow cell to attract the depositions and then electrically connected with a cathode of the flow cell to remove the depositions.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: June 21, 2016
    Assignee: ViZn Energy Systems, Inc.
    Inventors: Derek C. Tarrant, Richard M. Bendert, Gerald P. Backer
  • Flow cell with shunt current counter electrode
    Patent number: 9214686
    Abstract: Counter electrodes are used within the context of a flow cell to attract shunt current depositions during operation. The counter electrodes may be electrically connected with an anode of the flow cell to attract the depositions and then electrically connected with a cathode of the flow cell to remove the depositions.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: December 15, 2015
    Assignee: ViZn Energy Systems, Inc.
    Inventors: Derek C. Tarrant, Richard M. Bendert, Gerald P. Backer
  • Flow cell with corrugated flow screen
    Patent number: 9620791
    Abstract: A flow cell includes a separator and anode that define a flow cavity. The flow cell also includes an electrically conductive corrugated flow screen disposed within the cavity and electrically connected with the anode such that the flow screen, during charge, provides an electric shield to hinder deposition of metal between the anode and flow screen and to promote deposition of metal between the separator and flow screen.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: April 11, 2017
    Assignee: ViZn Energy Systems, Inc.
    Inventor: Derek C. Tarrant
  • Flow cell decontamination
    Patent number: 11585002
    Abstract: A controller stops flow of posolyte through a positive electrode chamber of a flow cell to trap the posolyte within the positive electrode chamber and hydraulically isolate the flow cell without stopping flow of negolyte through a negative electrode chamber of the flow cell, discharges the flow cell until hydrogen gas is evolved at a reactive surface of the positive electrode chamber while the posolyte is trapped within the positive electrode chamber, and subsequently discontinues the discharge and restarts the flow of the posolyte through the positive electrode chamber.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: February 21, 2023
    Assignee: ViZn Energy Systems, Inc.
    Inventors: Aaron Mannington Street, Derek C. Tarrant
  • Process for operating a redox flow battery system
    Patent number: 10003097
    Abstract: A redox flow battery system including a reactive cell with an anode chamber separated from a cathode chamber separated by an ion-permeable membrane is provided. A catholyte reservoir is connected to the cathode chamber by a catholyte fluid circulation circuit. An anolyte reservoir is connected to the anolyte chamber by an anolyte fluid circulation circuit. Nitrogen sparging of reactive oxygen from the catholyte fluid in the catholyte reservoir prevents the formation of a finely divided solid precipitate in the catholyte fluid. Nitrogen may be provided from an external source of nitrogen. Nitrogen may also be provided by the in situ generation of nitrogen from air.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: June 19, 2018
    Assignee: VIZN ENERGY SYSTEMS, INCORPORATED
    Inventors: Paul Abel Trudeau, Jr., Ronald David Brost
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