CN105742670B - A kind of method of fluid cell electrolyte flowing homogenization - Google Patents
A kind of method of fluid cell electrolyte flowing homogenization Download PDFInfo
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- CN105742670B CN105742670B CN201410748846.3A CN201410748846A CN105742670B CN 105742670 B CN105742670 B CN 105742670B CN 201410748846 A CN201410748846 A CN 201410748846A CN 105742670 B CN105742670 B CN 105742670B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The present invention relates to a kind of methods of fluid cell electrolyte flowing homogenization, increase flow resistance in fluid cell electrolyte anode import and export, reduce electrolyte flow speed of the anode import and export by anode；Flow resistance is reduced in two corners away from anode inlet and outlet, improves the electrolyte flow speed for passing through anode away from anode import and export；Increase flow resistance in fluid cell electrolyte cathode import and export, reduce electrolyte flow speed of the cathode import and export by cathode；Flow resistance is reduced in two corners away from cathode inlet and outlet, improves the electrolyte flow speed for passing through cathode away from cathode import and export.In order to improve inside battery entirety mass transfer, increase flow resistance in battery plus-negative plate import and export, reduce electrolyte flow rate；Flow resistance is reduced in two corners, increases electrolyte flow rate, so that flowing of the electrolyte in battery tends to homogenize, realizes that mass transfer in liquid phase is strengthened in battery, the effect that battery performance improves.
Description
Technical field
The present invention relates to a kind of methods of fluid cell electrolyte flowing homogenization, belong to technical field of energy storage.
Background technology
Inside flow battery, electrolyte flows to form circulation loop through interior flow field, and inside battery flow field is to electrolyte
Flow distribution is particularly significant.In traditional square diagonal flow flow battery, positive and negative anodes electrolyte is respectively through positive and negative anodes liquid
Import flows into battery, then through the electrode in positive and negative anodes half-cell, it is anti-that positive and negative anodes electrochemistry occurs at electrode active surface site
Ying Hou, electrolyte are flowed out from positive and negative anodes liquid outlet.Flow uniformity of the electrolyte in runner is directly affected in battery and passed
Matter situation, and then influence battery performance.In the diagonal flow liquid galvanic battery of traditional square, electrolyte flows uneven in runner, leans on
Nearly import and export flowing velocity is higher, and two adjacent corner's flowing velocities are small with importing and exporting, and easily form flow dead zone.This stream
Uneven distribution so that inside battery import and export mass transfer is stronger, and two corner's mass transfers are weaker, causes local larger dense
Difference polarization, reduces battery overall performance.In view of this, may be employed increases flow resistance in battery import and export, electrolyte is reduced
Flowing velocity；Flow resistance is reduced in two corners, increases the mode of electrolyte flow speed so that electrolyte is in battery runner
Interior flowing tends to homogenize, and strengthens mass transfer in liquid phase in battery, improves battery performance.
The content of the invention
To achieve the above object, a kind of method of fluid cell electrolyte flowing homogenization of the present invention, in flow battery electricity
Solving liquid anode import and export increases flow resistance, reduces electrolyte flow speed of the anode import and export by anode；Separate
Two corners of anode inlet and outlet reduce flow resistance, improve the electrolyte flow speed by anode away from anode import and export
Degree；Increase flow resistance in fluid cell electrolyte cathode import and export, reduce electrolyte of the cathode import and export by cathode
Flowing velocity；Flow resistance is reduced in two corners away from cathode inlet and outlet, improves and passes through cathode away from cathode import and export
Electrolyte flow speed.
The flow battery is square diagonal flow liquid galvanic battery, and positive and negative electrode is square；The electrolysis of its positive or negative pole
Liquid inlet and outlet is respectively arranged at two diagonal angles of square flow battery；The electrolyte inlet of anode and outlet and cathode
Electrolyte inlet and outlet are located at four angle positions of square flow battery respectively.
Increase the method for anode and cathode import and export flow resistance to reduce anode and cathode inlet and outlet electrode material nearby
The hydrophily of material；The method of two corner's flow resistances away from anode and cathode inlet and outlet is reduced to improve away from anode and bearing
The hydrophily of electrode material near two corners of pole inlet and outlet.
The electrolyte of anode is flowed by anode import, is exported and flowed out by anode after anode, close to anode import and anode
The electrode material hydrophily of the anode of two diagonal angles in exit is less than the hydrophily of the electrode material in the middle part of anode；Away from just
The electrode material hydrophily of the anode of two diagonal angles in pole import and anode exit is more than the electrode material in the middle part of anode
Hydrophily；Two diagonal angles and separate anode import and anode exit in the close anode import and anode exit
Two diagonal angles refer to any angle using square anode as the center of circle, with the half of shortest a line length in square anode
For radius, in the region residing for the quadrant drawn a circle to approve on square anode.
The electrolyte of cathode is flowed by cathode import, is exported and flowed out by cathode after cathode, close to cathode import and cathode
The electrode material hydrophily of the cathode of two diagonal angles in exit is less than the hydrophily of the electrode material in the middle part of cathode；Away from negative
The electrode material hydrophily of the cathode of two diagonal angles in pole import and cathode exit is more than the electrode material in the middle part of cathode
Hydrophily；Two diagonal angles and separate cathode import and cathode exit in the close cathode import and cathode exit
Two diagonal angles refer to any angle using square cathode as the center of circle, with the half of shortest a line length in square cathode
For radius, in the region residing for the quadrant drawn a circle to approve on square cathode.
Advantageous effect of the present invention
The present invention increases flow resistance in order to improve inside battery entirety mass transfer, in battery plus-negative plate import and export, reduces
Electrolyte flow rate；Flow resistance is reduced in two corners, increases electrolyte flow rate, so that flowing of the electrolyte in battery
Tend to homogenize, realize that mass transfer in liquid phase is strengthened in battery, the effect that battery performance improves.
Description of the drawings
The hydropathy profile of electrode in the square diagonal flow liquid galvanic batteries of Fig. 1；
Wherein 1- electrolyte inlets, 2- hydrophilies are the region of a, and 3- hydrophilies are the region of b, and 4- hydrophilies are the area of c
Domain, 5- electrolyte outlets.
Specific embodiment
By taking electrode shape is the square flow battery of square as an example, wherein the electrolyte of anode is flowed by anode import,
It is exported and flowed out by anode after anode, close to the electrode material parent of the anode of two diagonal angles in anode import and anode exit
Aqueous is a, less than the hydrophily b of the electrode material in the middle part of anode；Two diagonal angles away from anode import and anode exit
Anode electrode material hydrophily for c, more than the hydrophily b (a of the electrode material in the middle part of anode<b<c).In identical condition
Under, current density 80mA/cm-2When, voltage efficiency is higher using identical hydrophilic square flow battery than positive and negative anodes electrode
0.95%, current density is higher, and improvement becomes apparent from.
Claims (4)
- A kind of 1. method of fluid cell electrolyte flowing homogenization, it is characterised in that：It is passed in and out in fluid cell electrolyte anode Increase flow resistance at mouthful, reduce electrolyte flow speed of the anode import and export by anode；Away from anode inlet and outlet Two corners reduce flow resistance, improve the electrolyte flow speed for passing through anode away from anode import and export；In flow battery Electrolyte cathode import and export increases flow resistance, reduces electrolyte flow speed of the cathode import and export by cathode；Remote Two corners from cathode inlet and outlet reduce flow resistance, improve the electrolyte flow speed by cathode away from cathode import and export Degree；Increase the method for anode and cathode import and export flow resistance to reduce the parent of electrode material near anode and cathode inlet and outlet It is aqueous；The method for reducing by the two corner's flow resistances imported and exported away from anode and cathode passes in and out to improve away from anode and cathode The hydrophily of electrode material near two corners of mouth.
- 2. according to the method described in claim 1, it is characterized in that：The flow battery is square diagonal flow liquid galvanic battery, Positive and negative electrode is square；The electrolyte inlet of its positive or negative pole and outlet are respectively arranged at two of square flow battery diagonally Place；The electrolyte inlet of anode and outlet are located at four angles of square flow battery with the electrolyte inlet of cathode and outlet respectively Position.
- 3. according to the method described in claim 1, it is characterized in that：The electrolyte of anode is flowed by anode import, after anode It is exported and flowed out by anode, the electrode material hydrophily close to the anode of two diagonal angles in anode import and anode exit is less than The hydrophily of electrode material in the middle part of anode；The electrode material of the anode of two diagonal angles away from anode import and anode exit Expect the hydrophily for the electrode material that hydrophily is more than in the middle part of anode；Two of the close anode import and anode exit are diagonal Place and two diagonal angles in separate anode import and anode exit refer to any angle using square anode as the center of circle, Using the half of shortest a line length in square anode as radius, in the area residing for the quadrant drawn a circle to approve on square anode Domain.
- 4. according to the method described in claim 1, it is characterized in that：The electrolyte of cathode is flowed by cathode import, after cathode It is exported and flowed out by cathode, the electrode material hydrophily close to the cathode of two diagonal angles in cathode import and cathode exit is less than The hydrophily of electrode material in the middle part of cathode；The electrode material of the cathode of two diagonal angles away from cathode import and cathode exit Expect the hydrophily for the electrode material that hydrophily is more than in the middle part of cathode；Two of the close cathode import and cathode exit are diagonal Place and two diagonal angles in separate cathode import and cathode exit refer to any angle using square cathode as the center of circle, Using the half of shortest a line length in square cathode as radius, in the area residing for the quadrant drawn a circle to approve on square cathode Domain.
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| CN201410748846.3A CN105742670B (en) | 2014-12-09 | 2014-12-09 | A kind of method of fluid cell electrolyte flowing homogenization |
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| CN201410748846.3A CN105742670B (en) | 2014-12-09 | 2014-12-09 | A kind of method of fluid cell electrolyte flowing homogenization |
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| CN105742670A CN105742670A (en) | 2016-07-06 |
| CN105742670B true CN105742670B (en) | 2018-05-18 |
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| US10573899B2 (en) * | 2016-10-18 | 2020-02-25 | Lockheed Martin Energy, Llc | Flow batteries having an electrode with differing hydrophilicity on opposing faces and methods for production and use thereof |
Citations (3)
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|---|---|---|---|---|
| CN101841050A (en) * | 2010-05-31 | 2010-09-22 | 青岛武晓集团有限公司 | Novel flow frame device for all vanadium ion redox flow battery |
| CN102969517A (en) * | 2012-12-10 | 2013-03-13 | 贵州省岑巩县银峰矿业有限公司 | Liquid flow frame device for flow battery and electric pile formed by liquid flow frame device |
| CN103390759A (en) * | 2013-08-13 | 2013-11-13 | 湖南省银峰新能源有限公司 | Liquid flow frame structure for flow cell and electric pile formed by flow cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002195336A (en) * | 2000-12-26 | 2002-07-10 | Kayaba Ind Co Ltd | Valve structure of hydraulic shock absorber |
| US9379368B2 (en) * | 2011-07-11 | 2016-06-28 | California Institute Of Technology | Electrochemical systems with electronically conductive layers |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101841050A (en) * | 2010-05-31 | 2010-09-22 | 青岛武晓集团有限公司 | Novel flow frame device for all vanadium ion redox flow battery |
| CN102969517A (en) * | 2012-12-10 | 2013-03-13 | 贵州省岑巩县银峰矿业有限公司 | Liquid flow frame device for flow battery and electric pile formed by liquid flow frame device |
| CN103390759A (en) * | 2013-08-13 | 2013-11-13 | 湖南省银峰新能源有限公司 | Liquid flow frame structure for flow cell and electric pile formed by flow cell |
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