×

Redox flow battery system and cell stack

  • US 6,475,661 B1
  • Filed: 04/24/2000
  • Issued: 11/05/2002
  • Est. Priority Date: 01/28/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of operating a redox flow battery comprising a plurality of cells in electrical series defined by a stacked and repetitive arrangement of a conductive intercell separator having a generally bipolar function, a positive electrode, an ion exchange membrane, a negative electrode and another conductive intercell separator, each electrode being confined in a flow compartment, comprising:

  • flowing a positive half-cell electrolyte containing reducible and oxidizable ions of a first redox couple through the compartments containing said positive electrodes and flowing a negative half-cell electrolyte containing reducible and oxidizable ions of a second redox couple through the compartments containing said negative electrodes, wherein each of said negative half-cell electrolyte and said positive half-cell electrolyte separately flow through respective compartments of said stack in cascade through the plurality of cells by introducing each electrolyte with a given state of charge into the respective compartment of a first cell, at one end of the stack, and recovering each electrolyte from the respective compartment of a last cell of the stack, at the other end thereof, in a modified state of charge depending on the level and direction of electric current passed through the battery during a transit time through a given volume of electrolyte.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×