Redox flow battery with external supply line and/or disposal line

Patent metadata

Field	Value
Publication number	US-10665877-B2
Application number	US-201214368146-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 23, 2011
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

A redox flow battery is illustrated and described, having at least one cell frame enclosing a cell interior and having at least one supply line provided outside the cell frame for supplying electrolyte to the cell interior and/or at least one disposal line provided outside the cell frames for removing electrolyte from the cell interior. In order to provide greater degrees of freedom in the design of the cell so as to make available redox flow batteries with improved properties, it is envisaged that the supply line for supplying electrolyte to the cell interior and/or the disposal line for removing electrolyte from the cell interior is in fluid contact with the cell interior via a plurality of separate flow channels in the cell frame.

First claim

The invention claimed is:

1. A redox flow battery comprising:
a plurality of cells, wherein each cell comprises two half-cells, wherein each half-cell comprises a cell frame defining a half-cell interior,
a supply line positioned outside each of the cell frames of the half-cells to supply electrolyte to the redox flow battery,
a disposal line positioned outside each of the cell frames of the half-cells to remove electrolyte from the redox flow battery,
wherein each half-cell is provided with a plurality of separate supply channels extending through the cell frame to supply electrolyte to the half-cell interior of the half-cell from the corresponding supply line,
wherein each of the supply channels of the half-cells are unconnected to one another inside of the cell frames;
each half-cell being further provided with a plurality of separate disposal channels extending through the cell frame to remove electrolyte from the half-cell interior of the half-cell to the corresponding disposal line,
wherein each of the disposal channels of the half-cells are unconnected to one another inside of the cell frames.

2. The redox flow battery according to claim 1 , wherein the redox flow battery comprises at least 10 supply channels.

3. The redox flow battery according to claim 1 , wherein the redox flow battery comprises at least 20 supply channels.

4. The redox flow battery according to claim 1 , wherein the redox flow battery comprises at least 30 supply channels.

5. The redox flow battery according to claim 1 , wherein at least one of the supply channels has a hydraulic internal diameter of between 0.5 mm and 20 mm.

6. The redox flow battery according to claim 1 , wherein at least one of the supply channels has a hydraulic internal diameter of between 1 mm and 10 mm.

7. The redox flow battery according to claim 1 , wherein corresponding supply channels and disposal channels are provided on different sides of the half-cell.

8. The redox flow battery according to claim 1 , wherein at least a portion of the supply channels are at least substantially non-branched inside of the cell frame.

9. The redox flow battery according to claim 1 , wherein the cross-sectional surface area of the supply line is greater at least by a factor of 10 than a cross-sectional surface area of each of the supply channels.

10. The redox flow battery according to claim 1 , wherein the cross-sectional surface area of the supply line is greater at least by a factor of 50 than a cross-sectional surface area of each of the supply channels.

11. The redox flow battery according to claim 1 , wherein the cross-sectional surface area of the supply line is greater at least by a factor of 100 than a cross-sectional surface area of each of the supply channels.

12. The redox flow battery according to claim 1 , wherein the supply channels are surrounded over their entire circumference by the cell frames.

13. The redox flow battery according to claim 1 , wherein the plurality of cells are assembled to form a cell stack.

14. A redox flow battery comprising:
a plurality of half-cells, each half-cell comprising a cell frame defining a half-cell interior,
each half-cell being provided with a plurality of separate supply channels extending through the cell frame to supply electrolyte to the half-cell interior of the half-cell from a supply line provided outside of the cell frame, wherein each of the supply channels of the half-cells are unconnected to one another inside of the cell frames;
each half-cell being further provided with a plurality of separate disposal channels extending through the cell frame to remove electrolyte from the half-cell interior of the half-cell to a disposal line provided outside of the cell frame, wherein each of the disposal channels of the half-cells are unconnected to one another inside of the cell frames.

15. A method for operating a redox flow battery comprising a plurality of half-cells, each half-cell comprising a cell frame defining a half-cell interior, the method comprising:
supplying electrolyte to an interior of one of the half-cells via a plurality of separate supply channels extending through the cell frame from a supply line provided outside of the cell frame, the supply channels being unconnected to one another inside of the cell frames, and
removing electrolyte from the interior of the one of the half-cells via a plurality of separate disposal channels extending through the cell frame to a disposal line provided outside of the cell frame, the disposal channels being unconnected to one another inside of the cell frames.

16. The method according to claim 15 , further comprising:
supplying electrolyte to an interior of a second one of the half-cells via a second plurality of separate supply channels extending through the cell frame from a second supply line provided outside of the cell frame, the second supply channels being unconnected to one another inside of the cell frames, and
removing electrolyte from the interior of the second one of the half-cells via a plurality of second disposal channels extending through the cell frame to a second disposal line provided outside of the cell frame, the second disposal channels being unconnected to one another inside of the cell frames.

17. The method according to claim 15 , wherein the plurality of half-cells are assembled to form a cell stack.

18. The redox flow battery of claim 1 , wherein the supply channels of each half-cell and/or the disposal channels of each half-cell are parallel to one another and to a plane of the half-cells.

Assignees

• Fraunhofer Ges Forschung

Inventors

• Dotsch Christian
• Berthold Sascha
• Seipp Thorsten

Classifications

• H01M8/04276

  Arrangements for managing the electrolyte stream, e.g. heat exchange · CPC title

• H01M8/2459

  Comprising electrode layers with interposed electrolyte compartment with possible electrolyte supply or circulation · CPC title

• H01M8/188

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M8/0273

  with sealing or supporting means in the form of a frame · CPC title

• H01M8/04186 Primary

  of liquid-charged or electrolyte-charged reactants · CPC title