Redox flow battery and battery system

Patent metadata

Field	Value
Publication number	US-11670792-B2
Application number	US-202117308873-A
Country	US
Kind code	B2
Filing date	May 5, 2021
Priority date	May 15, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A redox flow battery and battery system are provided. In one example, the redox flow battery includes a cell stack assembly having a plate assembly positioned on a lateral side of the cell stack assembly and comprising an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction, and a plate frame coupled to the elastic flange.

First claim

The invention claimed is:

1. A redox flow battery comprising:
a cell stack assembly including:
a plate assembly positioned on a lateral side of the cell stack assembly and comprising:
an elastic flange including a recess mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction; and
a plate frame coupled to the elastic flange,

where the plate assembly is an endplate assembly, and where the plate frame is an endplate frame coupled to a pressure plate.

2. The redox flow battery of claim 1 , where the recess surrounds at least a portion of two sides of the conductive plate.

3. The redox flow battery of claim 1 , where the elastic flange is heat welded to the plate frame.

4. The redox flow battery of claim 1 , where the conductive plate comprises graphite.

5. The redox flow battery of claim 1 , where the conductive plate is a monopolar plate.

6. The redox flow battery of claim 1 , where the conductive plate is a bipolar plate.

7. The redox flow battery of claim 1 , where the conductive plate is adhesively coupled to the elastic flange.

8. The redox flow battery of claim 1 , where the conductive plate is not adhesively coupled to the elastic flange.

9. The redox flow battery of claim 1 , where the elastic flange includes a textured surface adhesively attached to a surface of the conductive plate.

10. The redox flow battery of claim 1 , where the elastic flange comprises rubber.

11. The redox flow battery of claim 1 , where the elastic flange mates with the conductive plate to form a double lap joint.

12. A redox flow battery comprising:
a cell stack assembly including:
a plate assembly positioned on a lateral side of the cell stack assembly and comprising:
an elastic flange including a recess mated with a section of a conductive plate and compliant in a vertical direction and/or a lateral direction; and
a plate frame coupled to the elastic flange;

where a longitudinally aligned gap is formed between a section of the plate frame and the elastic flange, and
where the plate assembly is an endplate assembly, and where the plate frame is an endplate frame coupled to a pressure plate.

13. The redox flow battery of claim 12 , where the elastic flange is longitudinally offset from a peripheral flange of the plate frame.

14. The redox flow battery of claim 12 , where the mated interface between the recess and the conductive plate forms a double lap joint.

15. The redox flow battery of claim 12 , where the elastic flange comprises rubber and the conductive plate comprises graphite.

16. The redox flow battery of claim 12 , where the elastic flange includes a textured surface having a textured pattern in face sharing contact with a surface of the conductive plate.

17. The redox flow battery of claim 12 , where the conductive plate is a monopolar plate.

18. The redox flow battery of claim 12 , where the conductive plate is a bipolar plate.

Assignees

• Ess Technology Inc

Inventors

• Evans Craig E
• Casey Sean
• Groberg Thiago
• Song Yang

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M8/248

  Means for compression of the fuel cell stacks · CPC title

• H01M8/242

  comprising framed electrodes or intermediary frame-like gaskets (H01M8/2425, H01M8/244 take precedence) · CPC title

• H01M8/0247

  characterised by the form (characterised by a channel configuration H01M8/0258) · CPC title

• H01M8/188 Primary

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