CN101719556B - Pile structure of redox flow battery - Google Patents
Pile structure of redox flow battery Download PDFInfo
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- CN101719556B CN101719556B CN2009103103206A CN200910310320A CN101719556B CN 101719556 B CN101719556 B CN 101719556B CN 2009103103206 A CN2009103103206 A CN 2009103103206A CN 200910310320 A CN200910310320 A CN 200910310320A CN 101719556 B CN101719556 B CN 101719556B
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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
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Abstract
The invention discloses a pile structure of a redox flow battery for storing energy through chemical reaction, which has the characteristic of improving the flowing uniformity of electrolyte. The pile structure of the redox flow battery comprises a battery stack formed by a plurality of single battery connected in series; each single battery comprises a positive pole sealing frame and a negative pole sealing frame; a collector plate which has a porous electrode and a conductive double electrode is arranged in the positive pole sealing frame; and flow field plates dividing the porous electrode into a plurality of flow guide areas are arranged in the porous electrode. The arranged flow field plates make the electrolyte flow in the porous electrode according to the flow guide areas separated by the flow field plates, increase the area of an electrochemical reaction interface and the flow speed at which the electrolyte passes through the porous electrode, make the flow of the electrolyte in the porous electrode more uniform, accelerate the electrochemical redox reaction, improve the current density of an electrochemical flow battery and obviously improve the efficiency of the conversion and storage of the electric energy and chemical energy in the electrochemical flow battery.
Description
Technical field
The present invention relates to electric pile structure, be specifically related to a kind of electric pile structure that carries out the redox flow batteries of electrical power storage through chemical reaction.
Background technology
At present; Liquid flow energy storage battery is one type of device that is fit to extensive electric power storage; By the battery pile that a plurality of monocell series connection form, each monocell comprises the positive pole sealing frame that is disposed in order, the collector plate that is positioned at anodal sealing frame, anode electrode, amberplex, negative electrode, negative pole sealing frame and the collector plate that is positioned at negative pole sealing frame.It has have extended cycle life, but capacity and power independent design, reliability are high, the restriction, the short advantage of construction period that do not receive the geographical position, compare with chemical energy storage devices such as other storage battery and ultracapacitors, cost performance and fail safe are very high.Flow battery more and more receives the attention of various countries aspect the coupling energy storage of wind energy, solar power generation very big potentiality being arranged.
Vanadium redox battery is that a kind of vanadium ion through different valence state transforms the novel flow battery of realizing electrical power storage and release each other; Form battery system owing to use element of the same race; Avoided positive and negative electrolyte to interpenetrate the cross-contamination issue of generation from principle; Useful life is longer, is applicable to the application aspect extensive energy storage.
In all-vanadium flow battery; Need through collector plate design in the battery pile, the usable floor area of electric conducting material electrode that improves common porousness stereochemical structure is so that improve current density, and the even distribution of assurance electrolyte; Avoid forming " channel " phenomenon; Also to simplify the structure of pile as far as possible, reduce materials processing and assembly difficulty, be convenient to further engineering and amplify and lower system cost.The dark groove of water conservancy diversion that the comb-type structure that adopts on the sealing frame and the conductive plastics electrode formation electrolyte of thin plate are arranged in the prior art; Let the as far as possible uniformly parallel type of flow of passing porous electrode of electrolyte; Active material in the electrolyte is fully contacted with stereo electrod; Increase the electrochemical reaction interfacial area, promote electrochemical redox reaction, thereby improve battery current density.But the active material in the electrolyte is slower in the porous electrode diffusion inside; Particularly to large-area porous electrode; Because solution resistance everywhere is inconsistent; Be easy to form the dead band of electrode reaction, cause local polarizing voltage too high and liberation of hydrogen takes place analyse side reactions such as oxygen at inner form " channel " of porous electrode.
Summary of the invention
The technical problem that the present invention solved provides a kind of electric pile structure that improves the inhomogeneity redox flow batteries of electrolyte flow.
The technical solution adopted for the present invention to solve the technical problems is: the electric pile structure of redox flow batteries; Comprise the battery pile that a plurality of monocell series connection form; Each monocell comprises anodal sealing frame and negative pole sealing frame; Collector plate with porous electrode and conduction bipolar electrode is set in positive pole sealing frame, in porous electrode, is provided with the flow-field plate that porous electrode is divided into a plurality of water conservancy diversion zone.
Further be that said conduction bipolar electrode adopts the composite material of acidproof sludge proof engineering plastics and graphite to make.
The invention has the beneficial effects as follows: through the flow-field plate that is provided with; The water conservancy diversion zone flows that electrolyte is distributed according to flow-field plate in porous electrode inside; Also accelerated flowing of electrolyte cross porous electrode when increasing the electrochemical reaction interfacial area; Make electrolyte flowing in porous electrode also more even simultaneously, promote electrochemical redox reaction speed, improve the flow battery current density; Also obviously improve electric energy and chemical transformation of energy and efficiency of storage in the flow battery, be particluarly suitable for promoting the use of in the electric pile structure of redox flow batteries.
Description of drawings
Fig. 1 is the structural representation after monocell of the present invention decomposes;
Fig. 2 is the structural representation of collector plate;
Fig. 3 is the cutaway view of A-A direction among Fig. 2.
Be labeled as among the figure: anodal sealing frame 1, negative pole sealing frame 2, conduction bipolar electrode 3, collector plate 4, porous electrode 5, flow-field plate 6, anode electrode 7, amberplex 8, negative electrode 9.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
Extremely shown in Figure 3 like Fig. 1; The electric pile structure of redox flow batteries of the present invention; Comprise the battery pile that a plurality of monocell series connection form; Each monocell comprises positive pole sealing frame 1 and negative pole sealing frame 2, and the collector plate 4 with porous electrode 5 and conduction bipolar electrode 3 is set in positive pole sealing frame 1, in porous electrode 5, is provided with the flow-field plate 6 that porous electrode 5 is divided into a plurality of water conservancy diversion zone.Through the flow-field plate 6 that is provided with; This flow-field plate 6 is divided into a plurality of water conservancy diversion zone with porous electrode 5; The water conservancy diversion zone flows that electrolyte is distributed according to flow-field plate 6 in porous electrode 5 inside; Also accelerated flowing of electrolyte cross porous electrode when increasing the electrochemical reaction interfacial area, made electrolyte flowing porous electrode 5 in also more even simultaneously, promotion electrochemical redox reaction speed; Improve the flow battery current density, also obviously improve electric energy and chemical transformation of energy and efficiency of storage in the flow battery.Flow-field plate 6 is the multiple flow field of flexible design mode separately; As can adopt flow field structure forms such as interdigital flow field, serpentine flow, parallel groove flow field, mesh flow field; When improving electrode activity and response area, simplified electric pile structure; Reduce parts and made things convenient for the assembling of battery, and reduced the material cost of battery.Thickness after the thickness of flow-field plate 6 and porous electrode 5 compressions is suitable; Be compounded in after flow-field plate 6 can design separately on the conduction bipolar electrode 3, also can in compacting conduction bipolar electrode 3, directly suppress flow-field plate 6 with electrode material.
Because of electrolyte for containing the vanadium sulfuric acid solution, be the useful life of improving conduction bipolar electrode 3, said conduction bipolar electrode 3 adopts the composite material making of acidproof sludge proof engineering plastics and graphite.The acidproof engineering plastics of anti-sludge proof the (polyvinyl chloride or fluosilicic rubber etc.) have anticorrosion properties with the composite material of graphite, thereby can improve the anticorrosive and antioxygenic property of conduction bipolar electrode 3, improve its useful life.
Embodiment:
The electrode active material that uses vanadium redox battery is for containing the vanadium sulfuric acid solution, and anodal electrolyte is for containing V
4+/V
5+The sulfuric acid solution of oxidation-reduction pair, negative pole electrolyte is for containing V
2+/ V
3+The sulfuric acid solution of oxidation-reduction pair.
The reaction principle of vanadium electricity oil is following:
Anodal:
E
0=1.00V
Negative pole:
E
0=-0.26V
Two batteries of design and assembly, collector plate be the conductive electrode plate of 1mm, the active electrode area is 500*300mm, one group of composite flow field plates (interdigital flow field), the real reaction electrode area of removing after the flow-field plate is 1250cm
2, another group is the plate electrode of no flow-field plate.Both positive and negative polarity electrolyte is the 1.6mol/L V of 1000ml
4++ 3mol/L H
2SO
41.6mol/L V with 1000ml
3++ 3mol/L H
2SO
4Solution, porous electrode are graphite felt.
Under the situation of the flow velocity unanimity that keeps both positive and negative polarity electrolyte; Adopt constant voltage charge; There have the charging current of flow field battery to exceed than no flow field to be nearly 30%, explains that patent application of the present invention can improve the distributing homogeneity of active material in porous electrode of electrolyte, accelerates flowing of electrolyte cross porous electrode; Increase electrochemical reaction rates, improve the charging performance of flow battery.
Claims (2)
1. the electric pile structure of redox flow batteries; Comprise the battery pile that a plurality of monocell series connection form; Each monocell comprises anodal sealing frame (1) and negative pole sealing frame (2); Collector plate (4) with porous electrode (5) and conduction bipolar electrode (3) is set in positive pole sealing frame (1), it is characterized in that: in porous electrode (5), be provided with the flow-field plate (6) that porous electrode (5) is divided into a plurality of water conservancy diversion zone.
2. the electric pile structure of redox flow batteries as claimed in claim 1 is characterized in that: the composite material making of said conduction bipolar electrode (3) acidproof sludge proof engineering plastics of employing and graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103103206A CN101719556B (en) | 2009-11-24 | 2009-11-24 | Pile structure of redox flow battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103103206A CN101719556B (en) | 2009-11-24 | 2009-11-24 | Pile structure of redox flow battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101719556A CN101719556A (en) | 2010-06-02 |
| CN101719556B true CN101719556B (en) | 2012-05-02 |
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ID=42434093
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103103206A Expired - Fee Related CN101719556B (en) | 2009-11-24 | 2009-11-24 | Pile structure of redox flow battery |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299348A (en) * | 2010-06-25 | 2011-12-28 | 中国科学院大连化学物理研究所 | Porous electrode structure of redox flow battery and preparation method thereof |
| CN102299356A (en) * | 2011-07-18 | 2011-12-28 | 中国东方电气集团有限公司 | Current collector of flow battery and flow battery |
| JP5964986B2 (en) * | 2011-12-20 | 2016-08-03 | ユナイテッド テクノロジーズ コーポレイションＵｎｉｔｅｄ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏｒｐｏｒａｔｉｏｎ | Flow battery using mixed flow |
| CN102593481B (en) * | 2012-03-14 | 2014-07-02 | 中国东方电气集团有限公司 | Flow battery, battery stack, battery system and control method for electrolyte thereof |
| EP3496198A4 (en) * | 2016-08-05 | 2020-06-03 | Showa Denko K.K. | Redox flow battery |
| US20190334193A1 (en) * | 2016-12-28 | 2019-10-31 | Showa Denko K.K. | Current collector plate, redox flow cell, and redox flow cell production method |
| CN108933270A (en) * | 2017-05-25 | 2018-12-04 | 神华集团有限责任公司 | Flow battery and liquid stream battery stack |
| CN109411781A (en) * | 2017-08-18 | 2019-03-01 | 上海电气集团股份有限公司 | Collector plate and pile comprising it |
| EP3534448A1 (en) * | 2018-02-28 | 2019-09-04 | Siemens Aktiengesellschaft | Redox flow battery with at least one cell and an electrode element and method of forming a conductive pattern of a redox flow battery electrode element |
| CN108987763B (en) * | 2018-08-01 | 2021-08-17 | 西南交通大学 | Flow battery bipolar plate with grading interdigital flow field |
| CN112436172A (en) * | 2019-08-26 | 2021-03-02 | 烟台大学 | Porous electrode and bipolar plate solidification integrated liquid flow energy storage battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316113A (en) * | 1999-07-01 | 2001-10-03 | 斯奎勒尔控股有限公司 | Membrane-separated, bipolar multicell electrochemical reactor |
| CN101308923A (en) * | 2007-05-18 | 2008-11-19 | 中国科学院大连化学物理研究所 | Carbon plastic electricity conductive bipolar board for liquid energy-storing battery and manufacture thereof |
-
2009
- 2009-11-24 CN CN2009103103206A patent/CN101719556B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316113A (en) * | 1999-07-01 | 2001-10-03 | 斯奎勒尔控股有限公司 | Membrane-separated, bipolar multicell electrochemical reactor |
| CN101308923A (en) * | 2007-05-18 | 2008-11-19 | 中国科学院大连化学物理研究所 | Carbon plastic electricity conductive bipolar board for liquid energy-storing battery and manufacture thereof |
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| CN101719556A (en) | 2010-06-02 |
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