CN103811779A - Electrode frame for flow cell, galvanic pile as well as cell system - Google Patents
Electrode frame for flow cell, galvanic pile as well as cell system Download PDFInfo
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- CN103811779A CN103811779A CN201410093346.0A CN201410093346A CN103811779A CN 103811779 A CN103811779 A CN 103811779A CN 201410093346 A CN201410093346 A CN 201410093346A CN 103811779 A CN103811779 A CN 103811779A
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- electrode frame
- flow cell
- depressed part
- frame
- bipolar plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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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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- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses an electrode frame for a flow cell. The electrode frame for the flow cell is provided with a frame body structure, wherein the frame body is provided with an internal edge, an external edge and two lateral surfaces. The electrode frame for the flow cell is characterized in that the internal edge along one lateral surface of a frame body is provided with a concave part which is of a frame body structure, and the concave part is provided with a concave part internal edge and a concave part external edge. According to the invention, the corrosion problem of a dual-pole plate of a galvanic pile of the flow cell at the electrolyte common pipeline at present is effectively solved, and the running stability and the running reliability of the galvanic pile are improved; the area of dual-pole plates required for assembling galvanic piles with the same specification is reduced by utilizing the electrode frame provided by the invention, and the utilization efficiency of the dual-pole plates is improved; dual-pole plate positioning holes are not required for the galvanic piles of the flow cell assembled by the electrode frame designed by the invention; the positioning operation of the dual-pole plates in the assembling process is saved; the assembling working procedure is simplified; the assembling efficiency of the galvanic pile is improved.
Description
Technical field
The present invention relates to electrode frame for flow battery, pile and stack system thereof, belong to flow battery technical field.
Background technology
The situation of worldwide energy shortage and environment exacerbated impels the cry of countries in the world development and utilization regenerative resource to grow to even greater heights.But, all there is the unsteadiness of energy supply in no matter solar energy or wind energy, needs the energy-storage system of function admirable supporting with it.Peak load shifting, the balanced load of electrical network also need scale energy storage technology.
As novel green secondary accumulator battery, that flow battery has is safe, flexible design, response fast, the advantage that hardly matches without other secondary cells such as extreme terrain requirement, operation and maintenance cost are lower, in multiple fields successful Application such as solar energy storage system, wind-powered electricity generation energy-storage system, large-scale emergency power system and electric power system peak load shiftings.
The monocell standard open circuit voltage of flow battery is less, for meeting practical application, the monocell series connection of some need to be assembled into pile, to obtain required voltage, as shown in Figure 1.Flow cell pile is made up of bipolar plates, electrode frame, ion-conductive membranes, electrode, end plate, collector plate and other parts conventionally.Electrolyte enters the both positive and negative polarity electrode of each monocell by the public pipeline of pile inside, negative or positive electrode electrolyte is all realized the distribution to each monocell in parallel.As shown in Figure 1, in current pile assembling mode, often select the area of bipolar plates and electrode frame identical, electrolyte passage position and consistent size in bipolar plates and electrode frame, mutually corresponding in the time of assembling, form the public pipeline of electrolyte continuous, concentric, that run through.
Flow battery is in charge and discharge process, pile electrolyte inside common line is one of the weakest part, because mobile electrolyte mutually collides and contacts with the bipolar plate material contacting, can make the public pipeline of the electrolyte place in elliptical region as shown in Figure 2 that chemistry and electrochemical corrosion occur.The generation of above-mentioned phenomenon can cause the decay of Performance data, along with the pile prolongation of running time, can cause electrolyte to form mutual string in bipolar plates corrosion place, loses the effect of separating both positive and negative polarity electrolyte, causes pile to work.
Summary of the invention
The object of the invention is by the improvement of structure and the coupling thereof of electrode frame and bipolar plates, solve the etching problem in the public pipeline of electrolyte position bipolar plates, thereby improve the stable performance of pile and reliability.
Flow battery electrode frame of the present invention, has frame structure, and described framework has inward flange, outward flange and two sides, it is characterized in that, inward flange along a side of described framework is provided with depressed part, and depressed part is also frame structure, has depressed part inward flange and depressed part outward flange.
Electrode frame depressed part as shown in Figure 6.
The present invention also provides flow cell pile, comprise successively the negative electrode frame that anode electrode frame, bipolar plates and the negative electrode as another adjacent monocell used as the positive electrode of a monocell are used, described anode electrode frame and described negative electrode frame have the structure of flow battery described above electrode frame, described depressed part is positioned at described anode electrode frame and the described negative electrode frame side near bipolar plates, the length of described bipolar plates is not more than the outer peripheral length of depressed part, and the width of described bipolar plates is not more than the outer peripheral width of depressed part.
Further, the depressed part of the depressed part of described anode electrode frame and negative electrode frame is mirror image.
Further, the thickness of described depressed part is 1/9～1 of bipolar plates thickness.
Further, the thickness of described depressed part is 1/2～1 of bipolar plates thickness.
Further, the thickness of described depressed part is the half of bipolar plates thickness.
Be not more than ± 0.2mm of the error of thickness described above.
Further, in order to solve the sealing problem between bipolar plates and electrode frame, the depressed part of described anode electrode frame and negative electrode frame is provided with respectively the first hermetically-sealed construction, and described electrode frame is closely connected by the first hermetically-sealed construction with bipolar plates.To guarantee the isolation of bipolar plates both sides electrolyte.
As shown in Figure 8, the first hermetically-sealed construction is linear sealing form, be that depressed part and bipolar plates adopt linear sealing, refer to the depressed part at anode electrode frame and negative electrode frame respectively, be symmetrical arranged two seal grooves, and the sealing strip that adapts with seal groove of employing is realized electrode frame and is connected with the tight of bipolar plates.
As shown in Figure 9, the first hermetically-sealed construction is face seal form, i.e. depressed part and bipolar plates employing face sealing refers to respectively at the depressed part of anode electrode frame and negative electrode frame, is symmetrical arranged sealing gasket, realizes electrode frame and is connected with the tight of bipolar plates.
The anode electrode frame of flow battery and negative electrode frame are provided with the public pipeline of electrolyte, further, in order to solve the interior leakage of the public pipeline electrolyte of electrolyte and the problem that leaks outside, anode electrode frame of the present invention is or/and negative electrode frame is provided with the second hermetically-sealed construction in the outside of the circumferencial direction of the public pipeline of electrolyte, and anode electrode frame is closely connected by the second hermetically-sealed construction with negative electrode frame.
As shown in figure 10, the second hermetically-sealed construction is linear sealing form, be provided with seal groove in the outside of the circumferencial direction of anode electrode frame or the public pipeline of negative electrode frame electrolyte, and anode electrode frame realized by the sealing strip that adapts with seal groove of employing and the tight of negative electrode frame is connected.
As shown in figure 11, the second hermetically-sealed construction is face seal form,, in the outside of the circumferencial direction of anode electrode frame or the public pipeline of negative electrode frame electrolyte, is symmetrical arranged sealing gasket, realizes the tight connection of anode electrode frame and negative electrode frame.
Further, the material of described sealing, sealing gasket is silicon rubber, ethylene propylene diene rubber or fluorubber, wherein preferred fluorubber.
The present invention also provides flow battery system, comprises above-described flow battery electrode frame, or comprises above-described flow cell pile.
The present invention has following features: the medial region of electrode frame is compared with exterior lateral area, thickness is little, the overall dimension in this region (being depressed part) is mated mutually with bipolar plates size, in the time of assembling pile, two electrode frame with mirror image are buckled together, bipolar plates fastens in the space forming, as shown in Figure 7 being placed on two electrode frame medial region.
1, the present invention has effectively solved the corrosion problems of current flow cell pile bipolar plates at the public pipeline of electrolyte place, has improved operation stability and the reliability of pile;
2, utilize electrode frame of the present invention, the bipolar plates area that assembling same size pile needs reduces, and has improved the utilization ratio of bipolar plates;
3, adopt the flow cell pile of the designed electrode frame assembling of the present invention not need pole plate location hole is set, saved the location work of bipolar plates in assembling process, simplified assembling procedure, improved the packaging efficiency of pile.
Accompanying drawing explanation
Accompanying drawing 12 width of the present invention,
Fig. 1 is traditional flow cell pile assembling schematic diagram;
Fig. 2 is the electrolyte common pipe line structure figure of traditional bipolar plate of redox flow battery and electrode frame;
Fig. 3 is electrode frame structure schematic diagram of the present invention;
Fig. 4 is electrode frame structure A-A generalized section of the present invention;
Fig. 5 is electrode frame structure B-B generalized section of the present invention;
Fig. 6 is electrode frame depressed part structural representation of the present invention;
Fig. 7 electrode frame of the present invention and bipolar plates package assembly schematic diagram;
Fig. 8 is electrode frame of the present invention and bipolar plates assembling linear sealing schematic diagram;
Fig. 9 is that electrode frame of the present invention and bipolar plates assembling face seal schematic diagram;
Figure 10 is the linear sealing schematic diagram at the public pipeline of electrode frame electrolyte of the present invention place;
Figure 11 is the face sealing schematic diagram at the public pipeline of electrode frame electrolyte of the present invention place;
Figure 12 is flow cell pile of the present invention and assembling schematic diagram thereof;
In figure: 1, bipolar plates; 2, electrode frame; 3, ion-conductive membranes; 4, electrode; 5, end plate; 6, collector plate; 7, the public pipeline of electrolyte; 8 depressed parts.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.
Electrode frame size: electrode frame 2 outward flange sizes are long is 1000mm, and wide is 800mm, and thickness is 5mm; Electrode frame inward flange length is 800mm, and width is 600mm; Electrode frame depressed part 8 thickness are 0.5mm ± 0.1mm, and electrode frame depressed part width is 25mm.
The public pipeline periphery of framework electrolyte of electrode frame adopts linear sealing mode, and potted line wire diameter is 0.2mm;
Ion-conductive membranes size: length is 1000mm, width is 800mm;
Electrode material is carbon felt, and length is 800, and width is 600mm;
According to conventional method, as shown in figure 12, each monocell of connecting in order, by end plate 5, collector plate 6, the first bipolar plates, the first anode electrode frame, the first positive electrode, ion-conductive membranes, the first negative electrode, the first negative electrode frame, the second bipolar plates, the second anode electrode frame ..., the like remaining part under certain pressure, be assembled into pile.
Electrode frame size: electrode frame outward flange size is long is 500mm, and wide is 400mm, and thickness is 3mm; Electrode frame inward flange length is 400mm, and width is 300mm; Electrode frame depressed part thickness is 0.3mm ± 0.1mm, and electrode frame depressed part width is 20mm.
Bipolar plates is that carbon is moulded conducing composite material plate, and length is 448mm, and width is 348mm, and thickness is 0.6mm;
Electrode frame one side contacting with bipolar plates adopts linear sealing mode, and potted line wire diameter is 0.2mm;
Between electrode frame electrolyte common pipe paths, adopt face sealing means, sealing gasket thickness is 0.2mm;
Ion-conductive membranes size: length is 500mm, width is 400mm;
Electrode material is carbon felt, and length is 400, and width is 300mm;
According to conventional method, as shown in figure 12, in order by end plate 5, collector plate 6, the first bipolar plates, the first anode electrode frame, the first positive electrode, ion-conductive membranes, the first negative electrode, the first negative electrode frame, the second bipolar plates, the second anode electrode frame ..., the like remaining part under certain pressure, be assembled into pile.
Claims (10)
1. flow battery electrode frame, has frame structure, and described framework has inward flange, outward flange and two sides, it is characterized in that, inward flange along a side of described framework is provided with depressed part, and depressed part is also frame structure, has depressed part inward flange and depressed part outward flange.
2. flow cell pile, comprise successively the negative electrode frame that anode electrode frame, bipolar plates and the negative electrode as another adjacent monocell used as the positive electrode of a monocell are used, it is characterized in that, described anode electrode frame and described negative electrode frame have the structure of electrode frame claimed in claim 1, described depressed part is positioned at described anode electrode frame and the described negative electrode frame side near bipolar plates, the length of described bipolar plates is not more than the outer peripheral length of depressed part, and the width of described bipolar plates is not more than the outer peripheral width of depressed part.
3. flow cell pile according to claim 2, is characterized in that, the depressed part of the depressed part of described anode electrode frame and negative electrode frame is mirror image.
4. according to the flow cell pile described in claim 2 or 3, it is characterized in that, the thickness of described depressed part is 1/9～1 of bipolar plates thickness.
5. flow cell pile according to claim 4, is characterized in that, the thickness of described depressed part is 1/2 of bipolar plates thickness.
6. flow cell pile according to claim 2, is characterized in that, the depressed part of described anode electrode frame and negative electrode frame is provided with respectively the first hermetically-sealed construction, and described electrode frame is closely connected by the first hermetically-sealed construction with bipolar plates.
7. flow cell pile according to claim 6, described anode electrode frame and negative electrode frame are provided with the public pipeline of electrolyte, it is characterized in that, described anode electrode frame is or/and negative electrode frame is provided with the second hermetically-sealed construction in the outside of the circumferencial direction of the public pipeline of electrolyte, and anode electrode frame is closely connected by the second hermetically-sealed construction with negative electrode frame.
8. flow cell pile according to claim 7, is characterized in that, described the first hermetically-sealed construction, the second hermetically-sealed construction are linear sealing or face sealing.
9. flow cell pile according to claim 8, is characterized in that, the material of described sealing is silicon rubber, ethylene propylene diene rubber or fluorubber.
10. flow battery system, is characterized in that, comprises flow battery electrode frame claimed in claim 1, or comprises the flow cell pile described in claim 2-8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093346.0A CN103811779A (en) | 2014-03-13 | 2014-03-13 | Electrode frame for flow cell, galvanic pile as well as cell system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410093346.0A CN103811779A (en) | 2014-03-13 | 2014-03-13 | Electrode frame for flow cell, galvanic pile as well as cell system |
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| CN103811779A true CN103811779A (en) | 2014-05-21 |
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| CN201410093346.0A Pending CN103811779A (en) | 2014-03-13 | 2014-03-13 | Electrode frame for flow cell, galvanic pile as well as cell system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322196A (en) * | 2014-07-24 | 2016-02-10 | 大连融科储能技术发展有限公司 | Flow battery electrode frame common flow channel sealing structure and sealing method thereof |
| CN106611863A (en) * | 2015-10-16 | 2017-05-03 | 中国科学院大连化学物理研究所 | Structure for preventing bipolar plate from being corroded in electric stack of redox flow battery |
| CN106960968A (en) * | 2016-01-11 | 2017-07-18 | 上海电气集团股份有限公司 | A kind of integrated electrode |
| WO2018086482A1 (en) * | 2016-11-09 | 2018-05-17 | 大连融科储能技术发展有限公司 | Electrode structure of flow battery, flow battery stack, and sealing structure for flow battery stack |
| CN109361004A (en) * | 2018-11-29 | 2019-02-19 | 南京邮电大学 | A kind of shell structure for liquid stream single battery system |
| CN111261895A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Flow battery electrode frame and application thereof and flow battery |
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| CN102074710A (en) * | 2010-11-10 | 2011-05-25 | 大连融科储能技术发展有限公司 | Die for preparing integrated electrode for full-vanadium liquid flow energy storage battery and application thereof |
| CN203300744U (en) * | 2013-04-23 | 2013-11-20 | 上海中科高等研究院 | Sealing structure for bipolar plates and flow frame for flow battery |
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Patent Citations (3)
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| CN101160679A (en) * | 2005-04-16 | 2008-04-09 | 再生燃料技术有限公司 | Electrochemical cell stack with frame elements |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322196A (en) * | 2014-07-24 | 2016-02-10 | 大连融科储能技术发展有限公司 | Flow battery electrode frame common flow channel sealing structure and sealing method thereof |
| CN105322196B (en) * | 2014-07-24 | 2018-05-22 | 大连融科储能技术发展有限公司 | The public flow passage sealing structure of flow battery electrode frame and encapsulating method |
| CN106611863A (en) * | 2015-10-16 | 2017-05-03 | 中国科学院大连化学物理研究所 | Structure for preventing bipolar plate from being corroded in electric stack of redox flow battery |
| CN106960968A (en) * | 2016-01-11 | 2017-07-18 | 上海电气集团股份有限公司 | A kind of integrated electrode |
| WO2018086482A1 (en) * | 2016-11-09 | 2018-05-17 | 大连融科储能技术发展有限公司 | Electrode structure of flow battery, flow battery stack, and sealing structure for flow battery stack |
| US11735747B2 (en) | 2016-11-09 | 2023-08-22 | Dalian Rongkepower Co., Ltd | Electrode structure including electrode fiber having higher density of vertical tows to parallel tows, flow battery stack including the same, and sealing structure including sealing gaskets connected by sealing wire |
| CN109361004A (en) * | 2018-11-29 | 2019-02-19 | 南京邮电大学 | A kind of shell structure for liquid stream single battery system |
| CN109361004B (en) * | 2018-11-29 | 2023-08-11 | 南京邮电大学 | Shell structure for flow single battery system |
| CN111261895A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Flow battery electrode frame and application thereof and flow battery |
| CN111261895B (en) * | 2018-11-30 | 2021-04-27 | 中国科学院大连化学物理研究所 | Flow battery electrode frame and application thereof and flow battery |
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Application publication date: 20140521 |
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