Flow battery, flow battery system, and control method

Patent metadata

Field	Value
Publication number	US-11228058-B2
Application number	US-201917050783-A
Country	US
Kind code	B2
Filing date	Apr 26, 2019
Priority date	Apr 27, 2018
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A flow battery according to an embodiment includes a cathode and an anode, an electrolytic solution, and a flow device. The electrolytic solution includes an indium component and a halogen species and contacts the cathode and the anode. The flow device causes the electrolytic solution to flow.

First claim

The invention claimed is:

1. A flow battery, comprising:
a cathode and an anode;
an electrolytic solution that includes an indium component, a zinc component and a halogen species and contact the cathode and the anode; and
a flow device that causes the electrolytic solution to flow, wherein
an electric current density on the anode at a time of charging and a flow rate of the electrolytic solution that flows in between the cathode and the anode are controlled based on amounts of the indium component and the zinc component that are contained in the electrolytic solution.

2. The flow battery according to claim 1 , wherein
the electrolytic solution is an alkali aqueous solution that contains 6 mol·dm −3 or more of an alkali metal.

3. The flow battery according to claim 1 , wherein
a ratio M x /M In of a molar mass M X of the halogen species and a molar mass M In of the indium component in the electrolytic solution is 3 or greater and 10 or less.

4. The flow battery according to claim 1 , wherein:
the flow device include a generation part that generates a gas bubble(s) in the electrolytic solution; and
the gas bubble(s) float(s) up between the cathode and the anode.

5. The flow battery according to claim 1 , wherein
the anode includes a first anode and a second anode that interpose the cathode therebetween and face one another.

6. The flow battery according to claim 1 , further comprising
a powder that is mixed in the electrolytic solution to be movable therein.

7. The flow battery according to claim 6 , wherein
the powder includes indium.

8. A flow battery system, comprising:
the flow battery according to claim 1 ; and
a control part that controls the flow battery, wherein:
the control part controls charging of the flow battery based on amounts of the indium component and the zinc component that are contained in the electrolytic solution.

9. The flow battery system according to claim 8 , wherein
the control part controls charging of the flow battery in such a manner that an electric current density I [mA·cm −2 ] on the anode and a flow rate R [cm·sec −1 ] of the electrolytic solution that flows in between the cathode and the anode satisfy a relationship of 1≤C Zn ×R 1/3 ×C In −1 ×I −1 ≤150 where C In [mol·dm −3 ] is a molar concentration of the indium component that is included in the electrolytic solution and C Zn [mol·dm −3 ] is a molar concentration of the zinc component.

10. A control method that is executed by a flow battery that includes:
a cathode and an anode;
an electrolytic solution that includes a zinc component, an indium component, and a halogen species and contacts the cathode and the anode; and
a flow device that causes the electrolytic solution to flow, wherein
an electric current density on the anode at a time of charging and a flow rate of the electrolytic solution that flows in between the cathode and the anode are controlled based on amounts of the indium component and the zinc component that are contained in the electrolytic solution.

Assignees

• Kyocera Corp

Inventors

• Ohkuma Takeshi

Classifications

• H01M4/24

  Electrodes for alkaline accumulators · CPC title

• H01M8/04746

  Pressure; Flow · CPC title

• H01M10/28

  Construction or manufacture · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title