Cell frame and redox flow battery

Patent metadata

Field	Value
Publication number	US-2021391584-A1
Application number	US-201917286422-A
Country	US
Kind code	A1
Filing date	Oct 11, 2019
Priority date	Oct 18, 2018
Publication date	Dec 16, 2021
Grant date	—

Abstract

Cell frame 20 includes: frame body 21 having an opening 22 , frame body 21 including through-hole 31 for passage of a fluid containing an active material, through-hole 31 penetrating from one surface of frame body 21 to the other surface thereof around opening 22 , and groove-like slit 35 formed in one surface or the other surface and connecting through-hole 31 and opening 22 ; and rotor 40 made of an insulating material, rotor 40 received in slit 35 and forced to rotate by the flow of the fluid through slit 35 between through-hole 31 and opening 22.

First claim

1 . A cell frame comprising:
a frame body having an opening, the frame body including a through-hole for passage of a fluid containing an active material, the through-hole penetrating from one surface of the frame body to the other surface thereof around the opening, and a groove-like slit formed in the one surface or the other surface and connecting the through-hole and the opening; and a rotor made of an insulating material, the rotor received in the slit and forced to rotate by a flow of the fluid through the slit between the through-hole and the opening.

2 . The cell frame according to claim 1 , wherein the rotor is received in a rotor receiving recess which is a portion of the slit that is wider than other portions thereof, and rotates in a plane perpendicular to a depth direction of the slit.

3 . The cell frame according to claim 2 , wherein the rotor rotates while being substantially in contact with at least one point of each of two portions of an inner wall surface defining the rotor receiving recess, the two portions separated from each other by a fluid inlet and a fluid outlet of the rotor receiving recess.

4 . The cell frame according to claim 3 , wherein the rotor is a cross-shaped rotor that rotates while sliding in the plane with respect to a shaft projecting from a bottom surface of the rotor receiving recess.

5 . The cell frame according to claim 4 , wherein the cross-shaped rotor includes: an elongated base including a long hole that extends in a longitudinal direction of the base, and supported by the shaft inserted into the long hole to be longitudinally slidable and rotatable; a pair of main vanes extending in opposite directions from both longitudinal ends of the base; and a pair of auxiliary vanes provided in a longitudinal center portion of the base and extending in opposite directions from both transverse ends of the base along a direction perpendicular to the pair of main vanes.

6 . The cell frame according to claim 3 , wherein the rotor is composed of a pair of Roots rotors that rotates while being in contact with each other.

7 . The cell frame according to claim 3 , wherein the rotor is composed a pair of oval gears that rotates while being in contact with each other.

8 . The cell frame according to claim 1 , wherein the frame body includes a further through-hole for passage of a fluid containing an active material, the further through-hole penetrating from one surface of the frame body to the other surface thereof around the opening, and a further groove-like slit formed in a surface opposite to a surface on which the slit is formed and connecting the further through-hole and the opening, and
wherein the cell frame further comprises a further rotor made of an insulating material, the further rotor received in the further slit and forced to rotate by a flow of the fluid through the further slit between the further through-hole and the opening, the further rotor having the same configuration as the rotor.

9 . The cell frame according to claim 8 , wherein the rotor and the further rotor are located at the same position in a plan view, and are mechanically or magnetically coupled to rotate in synchronization with each other.

10 . A redox flow battery comprising a cell stack having a plurality of stacked cells, wherein at least one of a plurality of cell frames that forms the plurality of cells is a cell frame according to claim 1 .

11 . The redox flow battery according to claim 10 , wherein the plurality of cell frames includes a plurality of rotors each of which is the rotor.

12 . The redox flow battery according to claim 11 , wherein the plurality of rotors is located at the same position when viewed from a stacking direction of the cell stack, and is mechanically or magnetically coupled to rotate in synchronization with each other.

13 . A redox flow battery comprising a cell stack having a plurality of stacked cells, wherein at least one of a plurality of cell frames that forms the plurality of cells is a cell frame according to claim 8 .

14 . The redox flow battery according to claim 13 , wherein the plurality of cell frames includes a plurality of rotors each of which is the rotor and a plurality of further rotors each of which is the further rotor.

15 . The redox flow battery according to claim 14 , wherein the plurality of rotors and the plurality of further rotors are located at the same position when viewed from a stacking direction of the cell stack, and are mechanically or magnetically coupled to rotate in synchronization with each other.

16 . The redox flow battery according to claim 10 , wherein the plurality of cells in the cell stack are connected to each other such that the fluid flows in parallel through the plurality of cells.

17 . The redox flow battery according to claim 10 , wherein the plurality of cells in the cell stack are connected to each other such that the fluid flows in series through the plurality of cells.

18 . The redox flow battery according to claim 10 , wherein the cell stack is divided into a plurality of cell groups each of which consists of the plurality of cells, the plurality of cell groups are connected to each other such that the fluid flows in parallel through the plurality of cell groups, and the plurality of cells in each of the cell groups are connected to each other such that the fluid flows in series or in parallel through the plurality of cells.

19 . The redox flow battery of claim 18 , further comprising a further rotor received in at least one of a plurality of flow passages respectively connected to the plurality of cell groups, the further rotor made of an insulating material and forced to rotate by a flow of the fluid through the at least one flow passage.

20 . A redox flow battery comprising a cell stack having a plurality of stacked cells,
wherein the cell stack is divided into a plurality of cell groups each of which consists of the plurality of cells, the plurality of cell groups is connected to each other such that a fluid containing an active material flows in parallel through the plurality of cell groups, and the plurality of cells in each of the cell groups is connected to each other such that the fluid flows in series or in parallel through the plurality of cells, and wherein the redox flow battery comprises a rotor received in at least one of a plurality of passage that are respectively connected to the plurality of cell groups, the rotor made of an insulating material and forced to rotate by a flow of the fluid through the at least one flow passage.

Assignees

• Toyo Engineering Corp

Inventors

• Nakao Takato
• THEEDA Uma Jaya Ravali

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M8/242

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

• H01M8/04186

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

• H01M8/188 Primary

  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