Flow Battery Apparatus with Shunted Current Repressed and Method Thereof

Patent metadata

Field	Value
Publication number	US-2017047605-A1
Application number	US-201615206415-A
Country	US
Kind code	A1
Filing date	Jul 11, 2016
Priority date	Aug 14, 2015
Publication date	Feb 16, 2017
Grant date	—

Abstract

A flow battery apparatus is provided with shunted currents repressed. The apparatus has a positive electrode device, a negative electrode device and a plurality of gas-gap devices. Gas-gap devices are separately set between branching channels and inlet and outlet manifolds of positive and negative electrodes. Each of the branching channels separately has an inserting tube to be inserted into one of the gas-gap devices. The diameter of the inserted vessel of gas-gap devices is bigger than the diameter of the inserting tube connected to a corresponding one of the branching channels. Thus, working liquids transferred to the positive and negative electrodes are segregated with coordination of the gas-gap devices. Only air spaces and discrete liquid drops are left between separated parts of the working liquids. Thus, shunted currents are repressed by preventing conductive paths from being formed between the positive and negative electrodes.

First claim

1 . A flow battery apparatus with shunted current repressed, comprising:
a positive electrode device, said positive electrode device comprising a plurality of positive electrodes; a plurality of first branching channels, said first branching channels being separately connected with said positive electrodes at two sides; an inlet diverging manifold, said inlet diverging manifold being connected to said first branching channels to be connected with said positive electrodes at one side of said positive electrodes; and an outlet converging manifold, said outlet converging manifold being connected to said first branching channels to be connected with said positive electrodes at the other side of said positive electrodes; a negative electrode device, said negative electrode device comprising a plurality of negative electrodes; a plurality of second branching channels, said second branching channels being separately connected with said negative electrodes at two sides; an inlet diverging manifold, said inlet diverging manifold being connected to said second branching channels to be connected with said negative electrodes at one side of said negative electrodes; and an outlet converging manifold, said outlet converging manifold being connected to said second branching channels to be connected with said negative electrodes at the other side of said negative electrodes; and a plurality of gas-gap devices, said gas-gap devices being located between said first and said second branching channels, said inlet diverging manifolds and said outlet converging manifolds, wherein each of said first and second branching channels is connected with an inserting tube to be separately inserted into an inserted vessel of said gas-gap devices with a diameter of said inserting tube connected with said first and second branching channels smaller than a diameter of said inserted vessel of said gas-gap devices.

2 . The flow battery apparatus according to claim 1 ,
wherein said inserting tube connected with said first and second branching channels has a coating made of an insulating material.

3 . The flow battery apparatus according to claim 1 ,
wherein said inserting tube connected with said first and second branching channels is made of an insulating material.

4 . The flow battery apparatus according to claim 1 ,
wherein an insulating material is located at each joint between said first and second branching channels, said inserting tube and said inserted vessel.

5 . The flow battery apparatus according to claim 1 ,
wherein said inserting tube connected with said first and second branching channels has a plurality of fins; and wherein said fins are made of an insulating material and located at outer edge of a place where said inserting tube is extended into said inserted vessel.

6 . The flow battery apparatus according to claim 1 ,
wherein said inserted vessel of said gas-gap devices has a plurality of fins; and wherein said fins are made of an insulating material and located on an inner surface of said inserted vessel of said gas-gap devices.

7 . The flow battery apparatus according to claim 1 ,
wherein said inserted vessel of said gas-gap devices contains an insulating material.

8 . The flow battery apparatus according to claim 1 ,
wherein said gas-gap devices are made of at least a part of insulating materials.

9 . The flow battery apparatus according to claim 1 ,
wherein each one of said first and second branching channels, said inlet diverging manifold, said outlet converging manifold, said inserting tube and said inserted vessel is selected from a group consist of a round pipe, an oval pipe, a square pipe, a polygonal pipe, a shrinking pipe, an expanding pipe and a deform pipe.

10 . The flow battery apparatus according to claim 1 ,
wherein said inlet diverging manifold has a driving unit to deliver liquid in a manner selected from a group consist of a pulsatile manner and a reciprocating manner.

11 . The flow battery apparatus according to claim 1 ,
wherein said inserted vessel is a common vessel to be inserted with said inserting tubes.

12 . The flow battery apparatus according to claim 11 ,
wherein said common vessel is connected to said first and second branching channels with said inlet diverging manifold and said inlet diverging manifold and has a plurality of individual rooms.

13 . The flow battery apparatus according to claim 11 ,
wherein said common vessel is connected to said first and second branching channels with said outlet converging manifold and said outlet converging manifold and has at least one room in common.

14 . The flow battery apparatus according to claim 1 ,
wherein each of said positive and said negative electrodes is imbedded in a plastic frame.

15 . The flow battery apparatus according to claim 14 ,
wherein said plastic frame has a plurality of flow channels.

16 . The flow battery apparatus according to claim 15 ,
wherein each of said flow channels has a gas-gap device.

17 . The flow battery apparatus according to claim 1 ,
wherein working liquids are segregated with coordination of said gas-gap devices on being delivered to said positive and negative electrodes and only gas spaces and discrete liquid drops are left between separated parts of said working liquids to repress shunted currents by preventing conductive paths from being formed between said positive electrodes and said negative electrodes.

Assignees

• Inst Nuclear Energy Res Atomic Energy Council Executive Yuan Roc

Inventors

• Chang Hwei-Liang
• Hsu Ning-Yih
• Hsu Yao-Sheng
• Chang Zone-Sure

Classifications

• H01M8/20

  Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes 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

• H01M8/2483

  characterised by internal manifolds · CPC title

• Y02E60/50

  Fuel cells · CPC title