CN103579641B - A kind of electric pile structure of flow battery - Google Patents
A kind of electric pile structure of flow battery Download PDFInfo
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- CN103579641B CN103579641B CN201210276212.3A CN201210276212A CN103579641B CN 103579641 B CN103579641 B CN 103579641B CN 201210276212 A CN201210276212 A CN 201210276212A CN 103579641 B CN103579641 B CN 103579641B
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- sheet frame
- sprue
- flow passage
- branch flow
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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
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
- H01M8/04283—Supply means of electrolyte to or in matrix-fuel cells
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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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- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
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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 electric pile structure of flow battery, comprise positive terminal pressing plate, negative pole end pressing plate, securing member, multiple liquid stream monocell is superposed up and down and is fixedly installed between positive terminal pressing plate and negative pole end pressing plate by securing member and forms pile, described liquid stream monocell comprises bipolar plates, and the membrane electrode assembly be folded between bipolar plates, described bipolar plates comprises the battery lead plate arranged in the inside casing of sheet frame and sheet frame, bipolar plates sheet frame and inside casing thereof are square or rectangle, bipolar plates sheet frame is provided with fluid passing hole and fluid passage, described fluid passage comprises sprue and branch flow passage, described sprue is arranged along bipolar plates sheet frame surrounding, its one end connects fluid passing hole, the other end connects branch flow passage, branch flow passage is communicated with inside casing.Compared with prior art, the present invention has can not self discharge, easily the advantage such as sealing.
Description
Technical field
The present invention relates to a kind of technical field of new energies, especially relate to a kind of electric pile structure of flow battery.
Background technology
The renewable energy power generation such as wind energy, solar energy is utilized to be the topmost mode that the mankind utilize generation of electricity by new energy in the future.Because wind energy, solar power generation process affect by natural cause such as weather etc., have randomness, discontinuous feature, the electric energy being difficult to keep stable exports, and the apparatus for storing electrical energy of needs and certain scale matches, form complete electric power system, ensure continual and steady electric power supply.Therefore, develop high, that storage volume is large, economic performance the is good energy-storage system of electric energy conversion efficiency and become the key problem in technology utilizing generation of electricity by new energy.With various forms of energy storage technology, such as retaining energy-accumulating power station, high speed flywheel mechanical energy storage, superconducting energy storage etc. are compared, the features such as it is high that electrochemical energy storage has energy conversion efficiency, and mobility is strong, have unique advantage in all kinds of energy storage technology.In various electrochemical energy storage technology, flow battery system has Large Copacity electrical power storage and Efficient Conversion function, and long service life, environmental protection, safety feature, be easy to match with wind energy, solar power generation, significantly can reduce equipment manufacturing cost, for generation of electricity by new energy provides technique guarantee.For network system energy storage, be suitable for the uninterrupted power supply use of medium-scale industrial enterprise, hotel, government department, effectively can improve grid supply quality, complete " peak load shifting " effect of electrical network.
All-vanadium flow battery (Vanadium Redox Battery, VRB) be a kind of mechanism of new electrochemical power sources, the storage and release that realize electric energy is mutually transformed by the vanadium ion of different valence state, use v element of the same race to form battery system, avoid variety classes active material between positive and negative half-cell from principle and interpenetrate the cross pollution of generation.(Fig. 1) use dissolve in the electrolytic solution different valence state vanadium ion as anode and negative electrode active material, anode electrolyte and electrolyte liquid separately store, avoid battery storage process self-discharge phenomenon from principle, be suitable for the application of extensive thermal energy storage process.Anode electrolyte storage tank B and electrolyte liquid storage tank A is all-vanadium flow battery by magnetic drive pump D positive pole E and negative pole E provides electrolyte, and positive pole E and negative pole E ' is separated by amberplex G, for power source loads C powers.When the power of wind energy, device of solar generating exceedes rated output power, by the charging to flow battery, be that chemical energy is stored in the ion pair of different valence state by electric energy conversion; When Blast Furnace Top Gas Recovery Turbine Unit (TRT) can not meet rated output power, flow battery starts electric discharge, is electric energy the chemical energy stored, and ensures stable electrical power stage.Because flow battery is for the significance of the renewable energy power generation such as wind energy, solar energy process, obtain common concern at home and abroad as key technology.
All-vanadium flow battery charge/discharge running, will there is following redox reaction in electrode.
Positive pole reacts:
E
0＝1.00V
Negative reaction:
E
0＝-0.26V
Because anode electrolyte and electrolyte liquid are in oxidizability valence state and reproducibility valence state respectively, it is no matter the charge/discharge running in pile inside, or electrolyte course of conveying, need to keep anode electrolyte and electrolyte liquid not to mix, otherwise between the vanadium ion of different valence state, exchang electron produces self-discharge phenomenon each other, has a strong impact on battery efficiency.Normal conditions, two kinds of electrolyte transfer pipelines, delivery pumps, and reservoir vessel easily realizes independently of one another, does not produce anode electrolyte and electrolyte liquid mixed problem.But electrolyte, at pile internal flow process and the flow process flowing through storage container, exists three kinds and causes positive pole, electrolyte liquid to mix or self-discharge phenomenon.1) through the mixing of amberplex: when amberplex is not good enough for vanadium ion barrier properties, cell charging/discharging running with hydrogen ions, vanadium ion generation transmembranal penetration; Can, by selecting suitable membrane material, improving vanadium ion/hydrogen ion selective, solving vanadium ion transmembranal penetration problem.2) through the mixing of pile hermetically-sealed construction: two kinds of electrolyte need simultaneously through same interface, and be assigned to electrode surface and carry out electrochemical reaction.Pile sealing will ensure that electrolyte can not leak into pile outside, guarantees that pile inside does not go here and there liquid to each other again, particularly in same plane, realizes amberplex and two kinds of electrolyte seal simultaneously, often very difficult.Existing flow battery technology (China Patent Publication No.: 1531761A, 1515046A) adopts O type sealing ring to crimp barrier film and hermetic electrolyte liquid mode simultaneously, carries out pile sealing, obtains certain effect.But, this electric pile structure sealing means depends critically upon battery sheet frame machining accuracy and seal member material properties, often because of factors such as variations in temperature, amberplex change in size in Long-Time Service process, cause two kinds of electrolyte to leak from sealing position, produce mixed self discharge problem.3) there is it during monocell each by electrolyte supply and import and export total pipeline with electrolyte, or be common conduit, cause each inside battery to produce by-pass current, cause self-discharge of battery, and cause battery capacity partial loss.
In order to the inner three kinds of electrolyte of the pile solving existing flow battery are from sealing position leakage, crossover leaks and being reduced by electrolyte self-discharge problem, avoid electrolyte to hand over justice to pollute, be reduced by electrolyte self-discharge, raising coulombic efficiency.Patent application 20091007843.2 discloses a kind of flow battery, its positive and negative liquid stream sheet frame and inside casing thereof are square or rectangle, positive and negative one jiao, liquid flow frame plate bottom arranges inlet opening, another angle arranges liquid pass hole, one jiao, top sets out fluid apertures, another angle arranges liquid pass hole, just, negative liquid stream sheet frame upper and lower is respectively equipped with feed liquor branch flow channel and fluid branch flow channel, feed liquor branch flow channel and fluid branch flow channel evenly connect and compose by three long straight trough head and the tail are roundabout, the length of the liquid in-out branch flow channel that has been multiplied, thus the electrolyte that has been multiplied enters, the resistance of fluid branch flow channel, thus flow battery self-discharge current is reduced at double, substantially increase the energy efficiency of flow battery.
But this scheme, the public dispensing orifice of turnover fluid is all arranged on deckle board, and public dispensing orifice will be quadratured larger, deckle board area is caused to increase, and the electrolyte that flows out of public dispensing orifice non-immediate enters electrode, but imported by S type liquid in-out branch flow channel, S type liquid in-out branch flow channel is also arranged on deckle board, area occupied is large, cause deckle board volume large, waste material, and the sealing of S type liquid in-out branch flow channel is more difficult, seal to make S type fluid passage, be provided with cover plate and cover S type fluid passage, but be still difficult to sealing, especially battery operation is worked as, when temperature raises, owing to expanding with heat and contract with cold, seal more difficult, the channelling of easy generation electrolyte, cause self discharge, in addition, S type fluid passage limited flow, flow resistance is handed over large, add the power consumption of the electrolyte delivery pump of whole flow battery system, thus reduce system effectiveness.
Summary of the invention
Object of the present invention is exactly provide one can not self discharge to overcome defect that above-mentioned prior art exists, the electric pile structure of the flow battery of easily sealing.
Object of the present invention can be achieved through the following technical solutions: a kind of electric pile structure of flow battery, comprise positive terminal pressing plate, negative pole end pressing plate, securing member, multiple liquid stream monocell is superposed up and down and is fixedly installed between positive terminal pressing plate and negative pole end pressing plate by securing member and forms pile, described liquid stream monocell comprises bipolar plates, and the membrane electrode assembly be folded between bipolar plates, described bipolar plates comprises the battery lead plate arranged in the inside casing of sheet frame and sheet frame, bipolar plates sheet frame and inside casing thereof are square or rectangle, bipolar plates sheet frame is provided with fluid passing hole and fluid passage, it is characterized in that, described fluid passage comprises sprue and branch flow passage, described sprue is arranged along bipolar plates sheet frame surrounding, its one end connects fluid passing hole, the other end connects branch flow passage, branch flow passage is communicated with inside casing.
The length of described sprue is arranged according to the conductivity of electrolyte, sprue is along bipolar plates sheet frame while setting of walking, its length is bipolar plates sheet frame length on one side, or sprue is arranged along the polygon walking of bipolar plates sheet frame, its length is the polygon length sum of bipolar plates sheet frame, or sprue is arranged along the walking of bipolar plates sheet frame peripheral circulation.
Described branch flow passage comprises a long straight trough and a comb shape groove, and described long straight trough one end is communicated with sprue, and is communicated with inside casing by comb shape groove.
Described bipolar plates sheet frame is bonded by positive plate sheet frame and its adjacent single cells negative plate sheet frame or is formed by sealing ring pressing, the inside casing of positive plate sheet frame and its adjacent single cells negative plate sheet frame shares a conductive plate composition bipolar plates, is provided with membrane electrode assembly between adjacent bipolar plates.
Described positive plate sheet frame front arranges positive pole branch flow passage, reverse side arranges positive pole sprue, anode electrolyte is from the positive pole branch flow passage flowing to front after fluid passing hole flow to the positive pole sprue of reverse side again, flow to inside casing from positive pole branch flow passage, described positive pole branch flow passage shape is made up of a strip straight trough and comb shape groove; Described negative plate sheet frame shape and positive plate sheet frame are roughly the same, front arranges negative pole branch flow passage, reverse side arranges negative pole sprue, electrolyte liquid is from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, flow to inside casing from negative pole branch flow passage, described negative pole branch flow passage shape is made up of a strip straight trough and comb shape groove.
Described positive plate sheet frame front arranges positive pole branch flow passage and positive pole sprue, and described negative plate sheet frame front arranges negative pole branch flow passage and negative pole sprue.
Described positive plate sheet frame front arranges positive pole branch flow passage, and reverse side arranges positive pole sow (channel) a and negative pole sow (channel) a, described negative plate sheet frame front arranges negative pole branch flow passage, reverse side arranges the positive pole sow (channel) b corresponding with positive plate sheet frame reverse side and negative pole sow (channel) b, the reverse side of positive plate sheet frame and negative plate sheet frame bonds or presses together formation bipolar plates by sealing ring, the positive pole sow (channel) a and the positive pole sow (channel) b that are arranged in its interlayer bond or form positive pole sprue after pressing, negative pole sow (channel) a and negative pole sow (channel) b bonds or forms negative pole sprue after pressing, anode electrolyte flow to the positive pole branch flow passage in front again flow to the positive pole sprue interlayer from fluid passing hole after, inside casing is flow to from positive pole branch flow passage, electrolyte liquid is from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, inside casing is flow to from negative pole branch flow passage.
Built-in pipe is provided with in described positive pole sprue and/or negative pole sprue.
Described positive plate sheet frame and negative plate sheet frame are respectively provided to a few seal groove and place sealing ring, in same monocell, be pressed in the amberplex both sides of same membrane electrode assembly between positive plate sheet frame and negative plate sheet frame respectively, sealed by sealing ring; Be pressed in respectively on same conductive plate between positive plate sheet frame in adjacent two monocells and negative plate sheet frame, sealed by sealing ring.
Described membrane electrode assembly is made up of two pieces of carbon felt sandwiched amberplexes, and described carbon felt is provided with many runners equidistantly distributed for transmitting electrolyte, and the material of described sheet frame is plastic material, comprises PP, PE and PVC.
Compared with prior art, the present invention has the following advantages:
1. arrange on bipolar plates sheet frame and fluid passage is set along surrounding, its length can determine according to the conductance of electrolyte, flowing through path thus changing the resistance of electrolyte of electrolyte is changed by the length of alter passage, than arranging on sheet frame, S type runner is easy to be sealed, reduce and leak, self discharge is reduced to minimum;
2. the sprue of fluid passage is arranged on bipolar plates sheet frame reverse side, and the fluid making itself and front participate in reacting separates, can not channelling, reduces self discharge;
3. built-in pipe is set in sprue, as long as by built-in pipe end seal, simple, effective, reduce and leak and self discharge.
Accompanying drawing explanation
Fig. 1 is all-vanadium flow battery schematic diagram;
Fig. 2 is positive plate sheet frame front schematic view;
Fig. 3 is positive plate sheet frame reverse side schematic diagram;
Fig. 4 is negative plate sheet frame front schematic view;
Fig. 5 is negative plate sheet frame reverse side schematic diagram;
Fig. 6 is the structural representation of monocell;
Fig. 7 is the schematic diagram of end plate;
Fig. 8 is the schematic diagram of liquid stream battery stack.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As illustrated in figs. 2 through 8, a kind of electric pile structure of flow battery, superposed up and down by multiple liquid stream monocell and positive terminal pressing plate is set respectively at upper and lower two ends, negative pole end pressing plate forms, pile housing is of a size of 805mm × 805mm, described liquid stream monocell comprises bipolar plates, and the membrane electrode assembly be folded between bipolar plates, described bipolar plates comprises the battery lead plate arranged in the inside casing of sheet frame and sheet frame, this bipolar plates sheet frame and inside casing thereof are square, bipolar plates sheet frame is provided with fluid passing hole and fluid passage, described fluid passage comprises sprue and branch flow passage, described sprue is arranged along bipolar plates sheet frame surrounding, its one end connects fluid passing hole, the other end connects branch flow passage, branch flow passage is communicated with inside casing.
As shown in Figure 6, described bipolar plates sheet frame comprises positive plate sheet frame 1 and negative plate sheet frame 2, conductive plate composition positive plate is set in the inside casing of positive plate sheet frame 1, graphite cake 3 is set in negative plate sheet frame and forms negative plate, membrane electrode assembly composition monocell is provided with between positive plate and negative plate, described membrane electrode assembly is made up of two pieces of carbon 4 felt sandwiched amberplexes 5, and described carbon felt 4 is provided with many runners equidistantly distributed for transmitting electrolyte.
As Figure 2-3, described positive plate sheet frame 1 front arranges positive pole branch flow passage 11, reverse side arranges positive pole sprue 12, positive pole branch flow passage 11 is made up of a long straight trough a111 and a comb shape groove a112, described long straight trough a111 one end is communicated with positive pole sprue 12, and being communicated with inside casing by comb shape groove a112, described positive pole sprue 12 is the runner be circularly set around positive plate sheet frame 1 reverse side.The both sides that positive plate sheet frame 1 is relative are arranged on positive pole branch flow passage and enter guiding gutter respectively as electrolyte and electrolyte goes out guiding gutter.Anode electrolyte is from the positive pole branch flow passage 11 flowing to front after the fluid inlet hole 13 of entrance point flow to the positive pole sprue a121 of reverse side again, flow into from long straight trough a111, inside casing is flow to again from comb shape groove a112, after the runner flowed through on carbon felt participates in reaction, flow to long straight trough b114 from the comb shape groove b114 of the port of export, then positive pole sprue b122 from the negative flows out after flowing to Fluid-exiting apertures 14;
As illustrated in figures 4-5, described negative plate sheet frame shape is identical with positive plate sheet frame, and front arranges negative pole branch flow passage, and reverse side arranges negative pole sprue, electrolyte liquid, from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, flows to inside casing from negative pole branch flow passage.
Be provided with built-in pipe 6 in negative pole sprue, built-in pipe 6 is sealed plastic flexible pipe, is fixed in negative pole sprue, and its import and export are all sealing adhesive on negative plate sheet frame, and one end is connected with fluid passing hole, and the other end is connected with fluid passage.
Described positive plate sheet frame 1 obverse and reverse is equipped with seal groove, is provided with sealing ring in seal groove: sealing ring 15 and sealing ring 16, is pressed in same membrane electrode assembly both sides sealing respectively by the sealing ring that sealing ring 15 is corresponding on negative plate sheet frame; Positive plate sheet frame in adjacent two monocells is sealed to being pressed in respectively on same graphite cake by sealing ring corresponding on sealing ring 16 and negative plate between negative plate sheet frame.
Monocell is layering, and arranges end plate at two ends, and end plate is made up of the conductive plate 8 of current-collecting panel 7 and coupling, then by the fastening composition liquid stream battery stack of fastening bolt, as shown in Figure 8.
Embodiment 2
The length of described sprue is arranged according to the conductivity of electrolyte, sprue is along bipolar plates sheet frame while setting of walking, its length is bipolar plates sheet frame length on one side, positive plate sheet frame front arranges positive pole branch flow passage and positive pole sprue, described negative plate sheet frame front arranges negative pole branch flow passage and negative pole sprue, is equipped with built-in pipe in positive pole sprue and negative pole sprue.All the other are with embodiment 1.
Sprue is also arranged along the polygon walking of bipolar plates sheet frame, as three limits or circulation one week or how all, sprue and branch flow passage is spaced out, avoids channelling, can reduce self discharge.
Sprue and branch flow passage are separately positioned on positive plate sheet frame or negative plate sheet frame, even if do not arrange built-in pipe also well can reduce self discharge.
Sprue also can be arranged on branch flow passage top, S-type setting, arranges built-in pipe in sprue simultaneously, and electrolyte enters branch flow passage after the built-in pipe of sealing flows through, and also significantly can reduce self discharge.
Embodiment 3
In same monocell, between positive plate sheet frame and negative plate sheet frame, membrane electrode assembly is set, in adjacent single cells, the inside casing of positive plate sheet frame and its adjacent single cells negative plate sheet frame shares a conductive plate, then positive plate sheet frame and its adjacent single cells negative plate sheet frame are formed bipolar plates by sealing ring pressing, in this bipolar plates: positive plate sheet frame front arranges positive pole branch flow passage, described positive pole branch flow passage shape is made up of a strip straight trough and comb shape groove, and reverse side arranges positive pole sow (channel) a and negative pole sow (channel) a, negative plate sheet frame front arranges negative pole branch flow passage, negative pole branch flow passage shape is made up of a strip straight trough and comb shape groove, reverse side arranges the positive pole sow (channel) b corresponding with positive plate sheet frame reverse side and negative pole sow (channel) b, the reverse side of positive plate sheet frame and negative plate sheet frame presses together and forms bipolar plates sheet frame, the positive pole sow (channel) a and the positive pole sow (channel) b pressing that are arranged in its interlayer form positive pole sprue, negative pole sow (channel) a and negative pole sow (channel) b pressing form negative pole sprue, anode electrolyte flow to the positive pole branch flow passage in front again flow to the positive pole sprue interlayer from fluid passing hole after, flow through comb shape groove from positive pole branch flow passage strip straight trough and enter inside casing, electrolyte liquid is from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, flow through comb shape groove from the strip straight trough of negative pole branch flow passage and enter inside casing.
Claims (6)
1. the electric pile structure of a flow battery, comprise positive terminal pressing plate, negative pole end pressing plate, securing member, multiple liquid stream monocell is superposed up and down and is fixedly installed between positive terminal pressing plate and negative pole end pressing plate by securing member and forms pile, described liquid stream monocell comprises bipolar plates, and the membrane electrode assembly be folded between bipolar plates, described bipolar plates comprises the battery lead plate arranged in the inside casing of sheet frame and sheet frame, bipolar plates sheet frame and inside casing thereof are square or rectangle, bipolar plates sheet frame is provided with fluid passing hole and fluid passage, it is characterized in that, described fluid passage comprises sprue and branch flow passage, described sprue is arranged along bipolar plates sheet frame surrounding, its one end connects fluid passing hole, the other end connects branch flow passage, branch flow passage is communicated with inside casing,
Described bipolar plates sheet frame is bonded by positive plate sheet frame and its adjacent single cells negative plate sheet frame or is formed by sealing ring pressing, the inside casing of positive plate sheet frame and its adjacent single cells negative plate sheet frame shares a conductive plate composition bipolar plates, is provided with membrane electrode assembly between adjacent bipolar plates;
Described positive plate sheet frame front arranges positive pole branch flow passage, reverse side arranges positive pole sprue, anode electrolyte is from the positive pole branch flow passage flowing to front after fluid passing hole flow to the positive pole sprue of reverse side again, flow to inside casing from positive pole branch flow passage, described positive pole branch flow passage shape is made up of a strip straight trough and comb shape groove; Described negative plate sheet frame shape and positive plate sheet frame are roughly the same, front arranges negative pole branch flow passage, reverse side arranges negative pole sprue, electrolyte liquid is from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, flow to inside casing from negative pole branch flow passage, described negative pole branch flow passage shape is made up of a strip straight trough and comb shape groove;
Or described positive plate sheet frame front arranges positive pole branch flow passage and positive pole sprue, described negative plate sheet frame front arranges negative pole branch flow passage and negative pole sprue;
Or described positive plate sheet frame front arranges positive pole branch flow passage, reverse side arranges positive pole sow (channel) a and negative pole sow (channel) a, described negative plate sheet frame front arranges negative pole branch flow passage, reverse side arranges the positive pole sow (channel) b corresponding with positive plate sheet frame reverse side and negative pole sow (channel) b, the reverse side of positive plate sheet frame and negative plate sheet frame bonds or presses together formation bipolar plates by sealing ring, the positive pole sow (channel) a and the positive pole sow (channel) b that are arranged in its interlayer bond or form positive pole sprue after pressing, negative pole sow (channel) a and negative pole sow (channel) b bonds or forms negative pole sprue after pressing, anode electrolyte flow to the positive pole branch flow passage in front again flow to the positive pole sprue interlayer from fluid passing hole after, inside casing is flow to from positive pole branch flow passage, electrolyte liquid is from the negative pole branch flow passage flowing to front after fluid passing hole flow to the negative pole sprue of reverse side again, inside casing is flow to from negative pole branch flow passage.
2. the electric pile structure of a kind of flow battery according to claim 1, it is characterized in that, the length of described sprue is arranged according to the conductivity of electrolyte, sprue is along bipolar plates sheet frame while setting of walking, its length is bipolar plates sheet frame length on one side, or sprue is arranged along the polygon walking of bipolar plates sheet frame, its length is the polygon length sum of bipolar plates sheet frame, or sprue is arranged along the walking of bipolar plates sheet frame peripheral circulation.
3. the electric pile structure of a kind of flow battery according to claim 1, is characterized in that, described branch flow passage comprises a long straight trough and a comb shape groove, and described long straight trough one end is communicated with sprue, and is communicated with inside casing by comb shape groove.
4. the electric pile structure of a kind of flow battery according to claim 1, is characterized in that, is provided with built-in pipe in described positive pole sprue and/or negative pole sprue.
5. the electric pile structure of a kind of flow battery according to claim 1, it is characterized in that, described positive plate sheet frame and negative plate sheet frame are respectively provided to a few seal groove and place sealing ring, in same monocell, be pressed in the amberplex both sides of same membrane electrode assembly between positive plate sheet frame and negative plate sheet frame respectively, sealed by sealing ring; Be pressed in respectively on same conductive plate between positive plate sheet frame in adjacent two monocells and negative plate sheet frame, sealed by sealing ring.
6. the electric pile structure of a kind of flow battery according to claim 1, it is characterized in that, described membrane electrode assembly is made up of two pieces of carbon felt sandwiched amberplexes, described carbon felt is provided with many runners equidistantly distributed for transmitting electrolyte, the material of described sheet frame is plastic material, comprises PP, PE and PVC.
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| CN104393308B (en) * | 2014-10-20 | 2017-11-14 | 中国东方电气集团有限公司 | Bipolar plates and flow battery |
| CN109716570A (en) * | 2016-08-05 | 2019-05-03 | 昭和电工株式会社 | Redox flow batteries |
| CN111446465B (en) * | 2020-04-08 | 2021-10-19 | 承德新新钒钛储能科技有限公司 | Integrated plate frame and electric pile of flow battery |
| CN111682239B (en) * | 2020-06-17 | 2021-05-11 | 深圳市绿谷能源科技有限公司 | Metal fuel electric pile |
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| US20050118485A1 (en) * | 2002-11-22 | 2005-06-02 | Hazem Tawfik | Bipolar plate and electrolyte application |
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| CN1515046A (en) * | 2001-06-12 | 2004-07-21 | ס�ѵ�����ҵ��ʽ���� | Cell frame for redox-flow cell and redox-flow cell |
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