Method of charging/discharging power through pipelines flown with electrolytes and apparatus using the same

Patent metadata

Field	Value
Publication number	US-9608286-B2
Application number	US-201514696556-A
Country	US
Kind code	B2
Filing date	Apr 27, 2015
Priority date	Jul 18, 2014
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Pipelines are used for charging and discharging power in a redox flow battery (RFB). Inner tube made of ion-exchange material is inserted into each of the pipelines. Conductive sleeves are installed on inside and outside the inner tube. Anode electrolyte and cathode electrolyte flow into corresponding ones of the pipelines of the inner tube. Thereby, wires connected with the conductive sleeves are extended out to be used as electrodes. On charging power, the anode electrolyte and the cathode electrolyte flow forwardly; yet, on discharging power, the anode electrolyte and the cathode electrolyte flow backwardly. Thus, the present invention uses pipelines to add or supplement function of charging/discharging power. Even when the RFB is damaged or failed, power is still charged/discharged for effectively improving or ensuring efficiency of the battery.

First claim

What is claimed is:

1. A method of charging/discharging power through pipelines flown with electrolytes the method comprising:
inserting an inner tube into each one of pipelines of a redox flow battery (RFB), said inner tube is made of an ion-exchange material; installing an inner conductive sleeve and an outer conductive sleeve are obtained inside and outside said inner tube, respectively; flowing electrolytes into corresponding ones of said pipelines of said inner tube; and providing a wire connected with said inner conductive sleeve and another wire connected with said outer conductive sleeve to serve as external electrodes to obtain a function of charging/discharging power through said pipelines; and
wherein, during charging power, said electrolytes flow forwardly and, during discharging power, said electrolytes flow backwardly.

2. The method according to claim 1 ,
wherein said pipelines are existing pipelines in said RFB.

3. The method according to claim 1 ,
wherein said function of charging/discharging power is a supplement to an existing function of charging/discharging power of said RFB.

4. The method according to claim 1 ,
wherein said pipelines comprises pipeline sections; said pipeline sections are connected to obtain a backup battery having potentials; and said pipeline sections are connected in a way selected from a group consisting of a serial way and a parallel way.

5. The method according to claim 1 ,
wherein an apparatus using the method comprises:

a first pipeline,
wherein said first pipeline has a first end connected to a first liquid-storing unit to communicate a first-polar electrolyte through a way selected from a group consisting of a direct connection and an extended connection;

a second pipeline,
wherein said second pipeline has a first end connected to a second liquid-storing unit to communicate a second-polar electrolyte through a way selected from a group consisting of a direct connection and an extended connection;
a first tee,
wherein said first tee has a first inlet, a second inlet and an outlet; said first inlet is connected to a second end of said first pipeline through a way selected from a group consisting of a direct connection and an extended connection; said second inlet is connected to a second end of said second pipeline through a way selected from a group consisting of a direct connection and an extended connection; and, in said first tee, one pipeline selected from a group consisting of said first pipeline and said second pipeline is held inside another pipeline which is not said one pipeline selected in the group;
a third pipeline,
wherein said third pipeline has an inlet connected to said outlet of said first tee; said third pipeline has an outer tube and an inner tube; said inner tube is located in said outer tube and is made of an ion-exchange material; an inner conductive sleeve and an outer conductive sleeve are put inside and outside of said inner tube, respectively; said first-polar electrolyte and said second-polar electrolyte flow into said inner tube and said outer tube, respectively; and
wherein a wire connected with said inner conductive sleeve and another wire connected with said outer conductive sleeve are separately extended out said outer tube as served as, respectively;
a second tee,
wherein said second tee has an inlet, a first outlet and a second outlet;

said inlet is connected to said outlet of said first tee through a way selected from a group consisting of a direct connection and an extended connection; said first outlet is connected to a third end of said first pipeline through a way selected from a group consisting of a direct connection and an extended connection; said second outlet is connected to a third end of said second pipeline through a way selected from a group consisting of a direct connection and an extended connection; said second tee separates said inner tube, along with said inner conductive sleeve, and said outer tube, along with said outer conductive sleeve, of said third pipeline to be separately connected back to said first pipeline and said second pipeline;
said RFB,
wherein said RFB has an inlet, which is connected to a fourth end of said first pipeline and a fourth end of said second pipeline; said RFB is connected to an external power supply to charge power by converting electrical energy into chemical energy to be stored in said first-polar electrolyte and said second-polar electrolyte; and said RFB is externally connected to a load to discharge power by converting chemical energy, which is stored in said first-polar electrolyte and said second-polar electrolyte, into electrical energy to be released to said load;
a fourth pipeline,
wherein said fourth pipeline has an end, which is connected to an outlet of said RFB, and another end, which is connected to said first liquid-storing unit, to output said first-polar electrolyte back to said first liquid-storing unit after charging/discharging power through redox reactions; and
a fifth pipeline,
wherein said fifth pipeline has an end, which is connected to an outlet of said RFB, and another end, which is connected to said second liquid-storing unit, to output said second-polar electrolyte back to said second liquid-storing unit after charging/discharging power through redox reactions,
wherein said external electrodes extended out said outer tube from said inner conductive sleeve and said outer conductive sleeve are optionally connected to said external power supply/said load to directly charge/discharge power through said third pipeline; on charging power, electrical energy is converted into chemical energy to be stored in said first-polar electrolyte and said second-polar electrolyte; and, on discharging power, chemical energy stored in said first-polar electrolyte and said second-polar electrolyte is converted into electrical energy to be released.

6. The method according to claim 5 ,
wherein each of said first tee and said second tee is selected from a group consisting of a reducing tee and a straight tee with reducer.

7. The method according to claim 5 ,
wherein each of said first tee and said second tee is selected from a group consisting of a Y-tee, a T-tee, a side-outlet tee, an equal-angle fork tee and a deformed tee; and said deformed tee is a multi-channel joint, which is restructured with sealed channel.

8. The method according to claim 5 ,
wherein said ion-exchange material is selected from a group consisting of a single material and a composite containing said single material; and said single material is a material selected from a group consisting of a cation-exchange material, an anion-exchange material and a proton-exchange material.

9. The method according to claim 5 ,
wherein said inner conductive sleeve and said outer conductive sleeve are made of conductive materials and fluids penetrate walls of said inner conductive sleeve and said outer conductive sleeve.

10. The method according to claim 5 ,
wherein each of said inner conductive sleeve and said outer conductive sleeve is selected from a group consisting of a braided sleeve and a holes sleeve; and said braided sleeve contains a material selected from a group consisting of carbon fiber, graphite fiber and metal.

11. The method according to claim 10 ,
wherein said metal is selected from a group consisting of a corrosion-resistant metal and a precious metal.

12. The method according to claim 5 ,
wherein said outer tube is made of a conductive material containing a material selected from a group consisting of graphite, conductive carbon, and metal.

13. The method according to claim 12 ,
wh

Assignees

• Inst Nuclear Energy Res Atomic Energy Council Executive Yuan Roc

Inventors

• Chang Hwei-Liang
• Tsai Yu-Te
• Chang Zone-Sure

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H01M8/188 Primary

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

• H01M8/004

  Cylindrical, tubular or wound · CPC title

• H02J7/0042

  Electricity · mapped topic

• Y02E60/528

  Cross-Sectional Technologies · mapped topic