Redox flow battery and battery system

Patent metadata

Field	Value
Publication number	US-2023253601-A1
Application number	US-202318295213-A
Country	US
Kind code	A1
Filing date	Apr 3, 2023
Priority date	May 15, 2020
Publication date	Aug 10, 2023
Grant date	—

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

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

a plate assembly including a second elastic flange that has a different shape in cross-section than the first elastic flange.

2 . The flow battery of claim 1 , wherein the second elastic flange has an S-shape in cross-section.

3 . The flow battery of claim 1 , where the plate assembly includes a first bipolar plate positioned above the second elastic flange.

4 . The flow battery of claim 3 , where the plate assembly includes a second bipolar plate positioned below the second elastic flange.

5 . The flow battery of claim 1 , wherein the endplate assembly includes a monopolar plate.

6 . The flow battery of claim 1 , where the elastic flange is heat welded to the plate frame and where the conductive plate comprises graphite.

7 . The flow battery of claim 1 , where the pressure plate exerts an inward force on the cell stack.

8 . The flow battery of claim 1 , where the cell stack includes a layer of felt adjacent to the conductive plate.

9 . The flow battery of claim 1 , where the flow battery is an iron redox flow battery.

10 . The flow battery of claim 1 , where the first elastic flange includes a textured surface.

11 . The flow battery of claim 10 , where the first elastic flange is adhesively attached to the conductive plate.

12 . A redox flow battery comprising:
a cell stack including:
an endplate plate assembly positioned on a side of the cell stack assembly and comprising:
a first elastic flange including a recess that is mated with a section of a conductive plate and compliant in at least one of a lateral direction and a vertical direction;
a plate frame coupled to the first elastic flange; and
a pressure plate coupled to the plate frame; and
a plate assembly including a second elastic flange that has an S-shape in cross-section.

13 . The redox flow battery of claim 12 , where the end plate assembly includes a first monopolar plate and the plate assembly includes a second monopolar plate.

14 . The redox flow battery of claim 12 , where the conductive plate is adhesively attached to the first elastic flange.

15 . The redox flow battery of claim 14 , where the first elastic flange is heat welded to the plate frame.

16 . The redox flow battery of claim 12 , where the pressure plate exerts an inward preload force on the cell stack.

17 . The redox flow battery of claim 16 , where a side bolt is coupled to the pressure plate.

18 . The redox flow battery of claim 12 , where the redox flow battery is an all-iron redox flow battery.

19 . The redox flow battery of claim 12 , where the plate assembly includes electrolyte ports and flow channels.

20 . The redox flow battery of claim 12 , where at least one of the first elastic flange and the second elastic flange includes a textured surface.

Assignees

• Ess Technology Inc

Inventors

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

Classifications

• H01M8/188 Primary

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

• H01M8/0247

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

• H01M8/242

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

• H01M8/248

  Means for compression of the fuel cell stacks · CPC title

• Y02E60/50

  Fuel cells · CPC title