Module system of redox flow battery

Patent metadata

Field	Value
Publication number	US-10483568-B2
Application number	US-201715666706-A
Country	US
Kind code	B2
Filing date	Aug 2, 2017
Priority date	Jul 7, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A module system of a redox flow battery is disclosed. The system includes a first redox flow battery module, through which first and second electrolytic solutions circulate, a second redox flow battery module, through which first and second electrolytic solutions circulate, first and second storage tanks storing the first electrolytic solutions of the first and second redox flow battery modules, a first main pipe connecting the first redox flow battery module fluidically to the first storage tank, and a first transfer pipe and a first equilibrium pipe which are configured to allow for fluid communication between the first electrolytic solutions of the first and second redox flow battery module. The first main pipe has a diameter greater than that of the first transfer pipe.

First claim

What is claimed is:

1. A module system of a redox flow battery, comprising:
a first redox flow battery module configured to circulate a first electrolytic solution independently therethrough;
a second redox flow battery module configured to circulate a second electrolytic solution independently therethrough;
a first storage tank configured to store the electrolytic solution of the first redox flow battery module;
a second storage tank configured to store the first second electrolytic solution of the second redox flow battery module;
a first main pipe set connecting the first redox flow battery module fluidically to the first storage tank, the first main pipe set including a first main pipe and a second main pipe, the first main pipe configured to supply the first electrolytic solution in the first storage tank to the first redox flow battery module, the second main pipe configured to supply the first electrolytic solution in the first redox flow battery module to the first storage tank; and
a first transfer pipe and a first equilibrium pipe which are configured to allow for fluid communication between the first electrolytic solution of the first redox flow battery module and the second electrolytic solution of the second redox flow battery module,
wherein the second main pipe has a diameter greater than that of the first transfer pipe.

2. The system of claim 1 , wherein the first transfer pipe is configured to allow the first electrolytic solution of the first redox flow battery module to be supplied into the second storage tank therethrough,
the first equilibrium pipe is configured to allow the second electrolytic solution in the second storage tank to be supplied into the first storage tank therethrough, and
a flow rate of the first electrolytic solution flowing through the first transfer pipe is substantially the same as that of the second electrolytic solution flowing through the first equilibrium pipe.

3. The system of claim 1 , wherein a one end of the first transfer pipe is connected to the second main pipe,
an opposite end of the first transfer pipe is connected to the second storage tank, and
a part of the first electrolytic solution flowing through the second main pipe is supplied into the second storage tank through the first transfer pipe.

4. The system of claim 3 , further comprising:
a valve on the second main pipe,
wherein the valve is configured to control a flow rate of the first electrolytic solution flowing through the first transfer pipe.

5. The system of claim 1 , wherein the first equilibrium pipe is configured to allow the first electrolytic solution in the first storage tank to have substantially the same level as that of the second electrolytic solution in the second storage tank.

6. The system of claim 1 , wherein the diameter and a length of the first transfer pipe are determined, based on efficiency loss caused by a shunt current between the first and second redox flow battery modules and a state-of-charge balancing between the first and second redox flow battery modules.

7. The system of claim 1 , further comprising:
a third redox flow battery module configured to circulate third electrolytic solution independently therethrough;
a third storage tank configured to store the third electrolytic solution of the third redox flow battery module; and
a second transfer pipe and a second equilibrium pipe that are configured to allow for fluid communication between the second electrolytic solution of the second redox flow battery module and the third electrolytic solution of the third redox flow battery module.

8. The system of claim 1 , further comprising:
a pump on the first main pipe,
wherein the pump and the first main pipe are configured to allow the first electrolytic solution to be supplied from the first storage tank into the first redox flow battery module.

9. The system of claim 1 , wherein the first redox flow battery module and the second redox flow battery module are connected in series to each other.

Assignees

• Oci Co Ltd

Inventors

• Kim Jaemin
• Um Myungsup
• Ye Heechang

Classifications

• H01M8/04186

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

• H01M8/04276 Primary

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

• H01M8/188 Primary

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

• Y02E60/50

  Fuel cells · CPC title