CN102479963B - Membrane module, flow battery unit and battery pile - Google Patents
Membrane module, flow battery unit and battery pile Download PDFInfo
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- CN102479963B CN102479963B CN201010574208.6A CN201010574208A CN102479963B CN 102479963 B CN102479963 B CN 102479963B CN 201010574208 A CN201010574208 A CN 201010574208A CN 102479963 B CN102479963 B CN 102479963B
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- flow battery
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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
Disclose a kind of membrane module, a kind of membrane module for flow battery unit, comprise: two frameworks, the hollow space that each framework comprises frame portion and limited by frame portion, frame portion is provided with at least one through hole for making fluid pass through, first side of two frame portion is facing with each other, and second side contrary with respective described first side of two frame portion is respectively equipped with at least one extends to described hollow space spout from through hole; Multiple strutting piece, strutting piece is connected in described frame portion through hollow space in a first direction; And barrier film, barrier film is remained on the hollow space of two frameworks by described strutting piece.The present invention also provides a kind of the flow battery unit and the battery pile that comprise this membrane module.Adopt this membrane module, that distributes in the process that electrolyte can be made to flow in barrier film is more even, reduces the internal resistance of flow battery unit, improves the useful life of barrier film.
Description
Technical field
The present invention relates to a kind of flow battery, particularly, relate to a kind of membrane module and comprise flow battery unit and the battery pile of this membrane module.
Background technology
At present, along with the aggravation of energy shortage and ecological deterioration, as a kind of energy storage device, flow battery is used widely due to features such as its life-span are long, reliability is high, operation and maintenance cost is low.Particularly, have developed all-vanadium flow battery, can not there is the phenomenon of both positive and negative polarity electrolyte cross pollution in it, and vanadium ion is more suitable for big current fast charging and discharging.All-vanadium flow battery generally comprises end plate, bipolar plates, barrier film, electrode material, electrode frame, encapsulant etc.
Chinese Patent Application No. CN200910157588.0 discloses a kind of flow battery integrated apparatus, comprise the negative pole liquid flow frame, negative pole, proton exchange membrane, positive pole, the positive pole liquid flow frame that connect successively, bonding by acidproof bonding agent between proton exchange membrane with liquid flow frame, be bonded together by conducting resinl between positive pole and proton exchange membrane and between negative pole and proton exchange membrane.
One of traditional flow battery feature is that power is separated with capacity, namely by using pump that electrolyte is squeezed into cell stack inlet from electrolyte fluid reservoir, flow through each flow battery unit in battery pile, finally flow out from the outlet of battery pile, and being back in electrolyte fluid reservoir, continuous circulation like this is reciprocal.
The flowing of electrolyte in battery pile is the key factor of the performance affecting battery pile.In flow battery technology, on battery lead plate, working fluid circulation road solves the uniform problem of flowing usually.But, in the middle of the flow battery of traditional vanadium flow battery and so on, because the material (as graphite) of electrode solution to battery lead plate has stronger corrosivity, working fluid circulation road on battery lead plate, the contact area of battery lead plate and electrolyte will be increased, thus the degree that increase battery lead plate is corroded.After battery lead plate is corroded, the oxide group (or oxide) that its surface produces can increase the internal resistance of battery pile, even corrosion failure, cause electrolyte leakage, make battery stop charging/discharging function, and and then corrosion miscellaneous part and equipment, pollute environment.
In the flow battery that another kind is traditional, in the import and export region of electrolyte or inner increase liquid flow assignment structure.But increase in import and export region liquid flow assignment structure can only before electrolyte enters working region more uniform feed liquor, and can not the electrolyte flow of flow battery working region be contributed to some extent, and, increase the restriction that liquid flow assignment structure can be subject to material property and level of processing, also bring technical problem to sealing simultaneously.
Summary of the invention
For solving in prior art the electrolyte that the exists technical problem in cell active area maldistribution, the invention provides a kind of membrane module and comprise flow battery unit and the battery pile of this membrane module, adopt this membrane module that electrolyte can be made more even in the resistance drop of cell active area each point, thus distribute in the process that electrolyte is flowed in cell active area more even, the polarization potential of final reduction flow battery unit, makes the performance of battery pile improve.
In addition, the membrane module proposed according to the present invention and comprise flow battery unit and the battery pile of this membrane module, while reduction battery pile internal flow resistance, can also reduce the loss in head of solution feed pump, and improve the useful life of barrier film further, improve the sealing property of battery pile.
Embodiment according to an aspect of the present invention, a kind of membrane module for flow battery unit is provided, comprise: two frameworks, the hollow space that each framework comprises frame portion and limited by described frame portion, described frame portion is provided with at least one through hole for making fluid pass through, first side of two described frame portion is facing with each other, and second side contrary with respective described first side of two described frame portion is respectively equipped with at least one extends to described hollow space spout from described through hole; Multiple strutting piece, described strutting piece is connected in described frame portion through described hollow space in a first direction; And barrier film, described barrier film is remained on the hollow space of two described frameworks by described strutting piece.
In above-mentioned membrane module, the strutting piece of two described frameworks is alternately arranged in parallel, so that described diaphragm support is become bellows-shaped.
In above-mentioned membrane module, described spout extends to form distributing trough further along the second direction vertical with described first direction on the edge of the described hollow space of vicinity of described second side of described frame portion.
In above-mentioned membrane module, described strutting piece and described frame portion are integrally formed.
In above-mentioned membrane module, described strutting piece is connected in described frame portion by connector.
In above-mentioned membrane module, described first side of described frame portion forms multiple groove, described groove and described strutting piece are alternately arranged.
In above-mentioned membrane module, described framework is made up of polytetrafluoroethylene or polyvinyl chloride.
According to a further aspect of the invention, provide a kind of flow battery unit, comprising: two battery lead plates, the outward flange of described battery lead plate is provided with the electrode frame of annular; Two porous electrodes, each described porous electrode to be arranged on described battery lead plate and to be positioned at described electrode frame; And any one membrane module above-mentioned, the frame portion of described membrane module is arranged between two described electrode frame, described porous electrode corresponding with described hollow space and with described membrane contacts.
According to the further aspect of the present invention, provide a kind of battery pile, comprise multiple above-mentioned flow battery unit, the stacked successively and electric series connection of multiple described flow battery unit.
According to flow battery unit and the battery pile of exemplary embodiment of the present invention, owing to have employed membrane module, make barrier film form parallel conductive flow structure, the electrolyte coming from spout can be guided to be evenly distributed on barrier film.Strutting piece supports porous electrode, thus reduces the contact resistance between porous electrode and battery lead plate.Further, strutting piece is adopted can to prevent flow battery unit in assembling and the course of work due to the stretching to barrier film, to rub etc. and to cause the damage to barrier film.
Accompanying drawing explanation
In order to make object of the present invention, feature and advantage more become apparent, below in conjunction with the drawings and specific embodiments, the invention will be further described, wherein:
Fig. 1 is the cross-sectional schematic of display according to the flow battery unit of a kind of exemplary embodiment of the present invention;
Fig. 2 is the decomposing schematic representation of a kind of exemplary embodiment of the membrane module of flow battery unit shown in display Fig. 1;
Fig. 3 is the schematic perspective view of a framework from unilateral observation of membrane module shown in display Fig. 2;
Fig. 4 is the floor map that a framework of membrane module shown in display Fig. 2 is observed from the second side;
Fig. 5 is the end view of the arrangement of the barrier film of membrane module shown in display Fig. 2;
Fig. 6 is the schematic diagram of the anabolic process of membrane module shown in display Fig. 2;
Fig. 7 shows the voltage distribution curves figure on the battery lead plate of traditional flow battery unit;
Fig. 8 is that display is according to the voltage distribution curves figure on the battery lead plate of flow battery unit of the present invention;
Fig. 9 is the change curve of the traditional flow battery unit of display and the charging voltage according to flow battery unit of the present invention;
Figure 10 is the change curve of the traditional flow battery unit of display and the discharge voltage according to flow battery unit of the present invention;
Figure 11 is the traditional flow battery unit of display and the comparative graph according to the energy efficiency of flow battery unit of the present invention and the utilance of electrolyte; And
Figure 12 is the schematic side view of the battery pile shown according to an embodiment of the present.
Embodiment
Although fully describe the present invention with reference to the accompanying drawing containing preferred embodiment of the present invention, before this describes, should be appreciated that those of ordinary skill in the art can revise invention described herein, obtain technique effect of the present invention simultaneously.Therefore, Yan Weiyi discloses widely to those of ordinary skill in the art must to understand above description, and its content does not lie in restriction exemplary embodiment described in the invention.
Fig. 1 is the cross-sectional schematic of display according to the flow battery unit 100 of a kind of exemplary embodiment of the present invention.As shown in Figure 1, according to flow battery unit 100 of the present invention, comprising: two battery lead plates 2, the outward flange of each battery lead plate 2 is provided with the electrode frame 21 of annular; Two porous electrodes 3 be made up of such as polyacrylonitrile sill or viscose glue sill, the side that each porous electrode 3 is arranged on battery lead plate 2 is positioned at electrode frame 21; Membrane module 1 (will describe in detail below), described membrane module 1 is between two porous electrodes 3.
Fig. 2-5 is schematic diagrames of a kind of exemplary embodiment of the membrane module 1 of flow battery unit 100 shown in display Fig. 1.According to the membrane module 1 for flow battery unit 100 of a kind of exemplary embodiment of the present invention, comprise: two frameworks 12 such as roughly circularizing shape, see Fig. 2-4, each framework 12 comprises the frame portion 121 that one is connected and the hollow space limited by frame portion 121, frame portion 121 is provided with at least one through hole 124 for making fluid pass through, first side of two frame portion 121 is facing with each other, second side contrary with the first respective side of two frame portion 121 is respectively equipped with at least one extends to hollow space 123 spout 125 from through hole 124, multiple strutting piece 122, described strutting piece 122 is connected in frame portion 121 through hollow space 123 in a first direction, barrier film 11, described barrier film 11 is remained on the hollow space 123 of two frameworks 12 by strutting piece 122.
In membrane module 1 of the present invention, framework 12 is such as made up of the material of polytetrafluoroethylene, polyvinyl chloride (PVC), polyethylene (PE) or polypropylene (PP) and so on, and this material has good corrosion resistance for such as V electrolyte.Strutting piece 122 is such as made up of the material of polyethylene, polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer and so on.The flat shape of framework 12 is roughly rectangle, square, circle or oval, to form membrane module 1 contour structures.As shown in Figure 4, two through holes 124 for making electrolyte flow through are formed in the frame portion 121 of framework 12, and form the spout 125 extending to hollow space 123 from through hole 124 on the second side of frame portion 121, the electrolyte coming from through hole 124 like this can flow to by spout 125 barrier film 11 being arranged on hollow space 123 place.Barrier film 11 can be the amberplex of such as Nafion 117 film or sulfonated polyether sulfone and so on, can realize the proton of electrochemistry liquid stream or the conductive process of ion, thus complete electrochemical reaction process.Further, frame portion 121 is also provided with multiple installing hole 127, whole flow battery unit 100 is installed together through the installing hole on installing hole 127 and battery lead plate 2 and electrode frame 21 by the connector of such as bolt and so on.In addition, be also provided with seal groove 129 at the outward flange of the frame portion 121 of housing 12, such as, sealing ring can be set in seal groove 129, combine with the sealing realized between adjacent two frameworks 12.
According to featured exemplary embodiment of the present invention, strutting piece 122 and frame portion 121 are such as integrally formed by molded.Alternatively, strutting piece 122 also can be connected in frame portion 121 by the connector of buckle, socket, even welding and so on.The strutting piece 122 of two frameworks 12 is alternately arranged in parallel, and like this, as shown in Figure 5, the strutting piece 122 of two frameworks 12 lays respectively at the both sides of barrier film 11, and barrier film 11 is supported to bellows-shaped.The bellows-shaped adopting this strutting piece 122 to be formed, can make barrier film 11 form parallel conductive flow structure, is evenly distributed in cell active area to guide the electrolyte coming from spout 125.Strutting piece 122 also plays the supporting role to porous electrode 3, thus reduces the contact resistance between porous electrode 3 and battery lead plate 2.Further, strutting piece 122 is adopted can to prevent flow battery unit 100 in assembling and the course of work due to the stretching to barrier film 11, to rub etc. and to cause the damage to barrier film 11.
According to the further embodiment of the present invention, spout 125 extends to form distributing trough 126 further along the second direction vertical with the first direction bearing of trend of strutting piece 122 (in the Fig. 4) on the edge of the contiguous hollow space 123 of the second side of frame portion 121.The whole length of side on a limit of distributing trough 126 Trans-Septal 11, thus electrolyte can be made to be distributed to more equably on barrier film 11.Further, first side of frame portion 122 forms multiple groove 128, and groove 128 and strutting piece 122 are alternately arranged, and the groove 128 in relative two frame portion 121 keeps corresponding, namely form male-female engagement, thus two frameworks 12 are combined more closely.And make barrier film 11 form bellows-shaped.
Fig. 6 is the anabolic process schematic diagram of display according to membrane module of the present invention.First, strutting piece 122 is mounted on the predeterminated position of frame portion 121 across the hollow space 123 of framework 12; Then, barrier film 11 is laid in one of them framework 12 mounted, afterwards, the framework 12 that another has installed strutting piece 122 will be installed, then with clasp locking, installs.Particularly, as shown in Figure 6, when installation two frameworks 12, be " axle " with a limit of upper and lower two frameworks 12, compress barrier film 11 one end, and make the other end of barrier film 11 keep lax, then be that two frameworks 12 are rotated towards barrier film 11 in the center of circle equably with axle, finally make two frameworks 12 combine, then with clasp locking, install.
Referring again to Fig. 1, according to flow battery unit 100 of the present invention, comprising: two battery lead plates 2, the outward flange of each battery lead plate 2 is provided with the electrode frame 21 of annular; Two porous electrodes 3, the side that each porous electrode 3 is arranged on battery lead plate 2 is positioned at electrode frame 21; Membrane module 1, the frame portion 121 of described membrane module 1 is arranged between two electrode frame 21, and porous electrode 3 is corresponding with hollow space 123 and contact with barrier film 11.
The following describes with reference to Fig. 7-11 according to traditional flow battery unit of test acquisition and the curve chart according to some performances of flow battery unit 100 of the present invention.It should be noted that, except membrane module 1, other structure and the condition of work of other structure of traditional flow battery unit and condition of work and flow battery unit 100 according to the present invention are identical.Wherein, Fig. 7 shows the voltage distribution curves figure on the battery lead plate of traditional flow battery unit; Fig. 8 is that display is according to the voltage distribution curves figure on the battery lead plate of flow battery unit of the present invention.As can be seen from Fig. 7 and 8, in flow battery unit of the present invention, because the electrolyte in battery unit 100 working region distributes more even, make the magnitude of voltage of diverse location on battery lead plate 2 relatively more even, polarization potential is lower.
Fig. 9 is the change curve of voltage when showing traditional flow battery unit and the charging according to flow battery unit of the present invention, and Figure 10 is the change curve of voltage when showing traditional flow battery unit and the electric discharge according to flow battery unit of the present invention.As can be seen from Fig. 9, Figure 10, according to flow battery unit 100 charging voltage of the use membrane module 1 of the present invention charging voltage a little less than traditional flow battery unit, and the discharge voltage of flow battery unit 100 of the present invention is a little more than the discharge voltage of traditional flow battery unit.Thus, can illustrate when working online, use the total internal resistance of flow battery of the flow battery unit 100 of the present invention of membrane module less.
Figure 11 is the traditional flow battery unit of display and the comparative graph according to the energy efficiency of flow battery unit of the present invention and the utilance of electrolyte.Wherein, energy efficiency is the ratio that battery exports energy and input energy, and be the leading indicator evaluating battery performance, the utilance of electrolyte refers to the ratio of actual battery electricity memory space and theoretical cell memory space.From the viewpoint of efficiency, flow battery unit 100 of the present invention improves 4% than the generating efficiency of traditional flow battery unit, and flow battery unit 100 of the present invention is than the flow battery discharge capacity (i.e. the utilance of electrolyte) of traditional flow battery unit higher by about 9%.Therefore, relative to traditional flow battery unit, flow battery unit 100 according to the present invention has the flow battery internal resistance of reduction and the utilance of the energy efficiency improved and electrolyte.
According to the further embodiment of the present invention, as shown in figure 12, battery pile 10 of the present invention comprise multiple connect successively flow battery unit 100, be positioned at the jockey 104 that electrolyte on outermost two flow battery unit imports and exports 102, is encapsulated in end cap 103 outside outermost two flow battery unit and such as bolt and so on, whole battery pile 10 for connecting two end caps 103, thus fits together by described jockey.
In flow battery unit according to the abovementioned embodiments of the present invention and battery pile, owing to have employed membrane module 1, make barrier film 11 form parallel conductive flow structure, the electrolyte coming from spout 125 can be guided to be evenly distributed in cell active area.Strutting piece 122 pairs of porous electrodes 3 support, thus reduce the contact resistance between porous electrode 3 and battery lead plate 2.Further, strutting piece 122 is adopted can to prevent flow battery unit 100 in assembling and the course of work due to the stretching to barrier film 11, to rub etc. and to cause the damage to barrier film 11.
After detailed description preferred embodiment of the present invention; those of ordinary skill in the art can clearly understand; various change and change can be carried out under the protection range not departing from claim of enclosing and spirit, and the present invention is not also limited to the execution mode of examples cited embodiment in specification.
Claims (7)
1. the membrane module for flow battery unit, comprise: two frameworks, the hollow space that each framework comprises frame portion and limited by described frame portion, described frame portion is provided with at least one through hole for making fluid pass through, first side of two described frame portion is facing with each other, and second side contrary with respective described first side of two described frame portion is respectively equipped with at least one extends to described hollow space spout from described through hole; Multiple strutting piece, described strutting piece is connected in described frame portion through described hollow space in a first direction; And barrier film, described barrier film remains on the hollow space of two described frameworks by described strutting piece;
Wherein, the strutting piece of two described frameworks is alternately arranged in parallel, so that described diaphragm support is become bellows-shaped;
Described spout extends to form distributing trough further, the whole length of side on a limit of distributing trough Trans-Septal along the second direction vertical with described first direction on the edge of the described hollow space of vicinity of described second side of described frame portion.
2. membrane module as claimed in claim 1, wherein, described strutting piece and described frame portion are integrally formed.
3. membrane module as claimed in claim 1, wherein, described strutting piece is connected in described frame portion by connector.
4. membrane module as claimed in claim 1, wherein, described first side of described frame portion forms multiple groove, described groove and described strutting piece are alternately arranged.
5. membrane module as claimed in claim 1, wherein, described framework is made up of polytetrafluoroethylene or polyvinyl chloride.
6. a flow battery unit, comprising: two battery lead plates, and the outward flange of described battery lead plate is provided with the electrode frame of annular; Two porous electrodes, each described porous electrode to be arranged on described battery lead plate and to be positioned at described electrode frame; And the membrane module as described in any one in claim 1-5, the frame portion of described membrane module is arranged between two described electrode frame, described porous electrode corresponding with described hollow space and with described membrane contacts.
7. a battery pile, comprises multiple unit of flow battery as claimed in claim 6, the stacked successively and electric series connection of multiple described flow battery unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010574208.6A CN102479963B (en) | 2010-11-30 | 2010-11-30 | Membrane module, flow battery unit and battery pile |
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| CN201010574208.6A CN102479963B (en) | 2010-11-30 | 2010-11-30 | Membrane module, flow battery unit and battery pile |
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| CN102479963B true CN102479963B (en) | 2015-09-16 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978648A (en) * | 2012-12-05 | 2013-03-20 | 吉首市汇锋矿业有限责任公司 | Electrolytic device for preparing vanadium cell electrolyte and electrolytic tank group |
| CN104600340B (en) * | 2014-12-26 | 2018-12-18 | 上海电气集团股份有限公司 | The electrode frame structure of monocell and monocell and pile in a kind of flow battery |
| CN105140543A (en) * | 2015-08-28 | 2015-12-09 | 中国东方电气集团有限公司 | Flow cell ion exchange membrane assembly, preparing method of flow cell ion exchange membrane assembly and flow cell comprising flow cell ion exchange membrane assembly |
| CN108400366B (en) * | 2018-03-09 | 2024-02-20 | 上海电气(安徽)储能科技有限公司 | Sealing structure and flow battery comprising same |
| CN110416590A (en) * | 2018-04-27 | 2019-11-05 | 江苏泛宇能源有限公司 | Pile frame for flow battery |
| CN110416584B (en) * | 2018-04-27 | 2021-04-16 | 江苏泛宇能源有限公司 | Stack frame for flow battery |
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