CN203367426U - Flow frame structure of flow battery and electric pile comprising flow frame structure - Google Patents
Flow frame structure of flow battery and electric pile comprising flow frame structure Download PDFInfo
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- CN203367426U CN203367426U CN2013204919641U CN201320491964U CN203367426U CN 203367426 U CN203367426 U CN 203367426U CN 2013204919641 U CN2013204919641 U CN 2013204919641U CN 201320491964 U CN201320491964 U CN 201320491964U CN 203367426 U CN203367426 U CN 203367426U
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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
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Abstract
The utility model discloses a flow frame structure of a flow battery and an electric pile comprising the flow frame structure. The flow frame structure comprises a positive flow frame and a negative flow frame, wherein the positive flow frame and the negative flow frame adopt a central symmetric structure and comprise main flow pipelines which are arranged inside the flow frames and communicated with an external liquid storage tank respectively; inlets of the main flow pipelines are liquid incoming and outgoing ports formed in surfaces of the flow frames; the liquid incoming and outgoing ports are communicated with distribution flow channels via voltage stabilization cavities, tooth-shaped flow limiting sections and S-shaped flow channels sequentially; and the distribution flow channels are communicated with a reaction area. With the adoption of the structure, the technical problem of large voltage differences caused by flow nonuniformity among single batteries is solved, and the voltage differences of the single batteries are in a small range, so that the stability and the safety of a vanadium battery are substantially improved, the impedance of a conductive path of an electrolyte is effectively increased, bypass currents are reduced, self-discharge of the battery is reduced, the electrolyte is prevented from flowing through side surfaces of the reaction area, and the reaction efficiency of the electrolyte is improved.
Description
Technical field
The utility model relates to flow battery, relates in particular to a kind of liquid flow frame structure of flow battery and the pile of composition thereof.
Background technology
Flow battery, especially vanadium redox battery is (referred to as vanadium cell, VRB), it is a kind of new and effective large capacity energy-storage battery, life-span is long, safe, and successful Demonstration Application is smoothly exported in the electric power of wind energy turbine set at present, following at wide new energy field, for example wind power generation, photovoltaic generation, intelligent grid etc., have wide application space.
For current common bipolar heap formula vanadium cell group, its inner main flow pipeline is the public electrolyte passage that the liquid inlet and outlet by liquid flow frame is formed by stacking, electrolyte enters each battery through main flow pipeline and branch road like this, makes to have ion channel between different batteries.Due to the battery series connection, electron channel is arranged between battery again.When electron channel and ion channel formation closed-loop path, the electrolyte in branch road, just as conductor, has electric current to pass through.Their existence makes inside battery produce by-pass current
,cause self-discharge of battery, cause the battery capacity partial loss.Even also exist in the situation that this electric current external circuit disconnects.Because this electric current is without load, so the performance of battery is produced to significant impact.
The generation of by-pass current is defect and the difficult point in the flow battery system, in pile, should be eliminated.The generation of by-pass current also causes other problems: because potential difference between terminal anode and negative electrode is large, Direct Electrolysis liquid passage is arranged again, now can on the two poles of the earth, produce the electrochemical reaction that is different from battery system itself.These reactions occur at the high current density place, in the electrode generation oxidation reaction of positive terminal, in the electrode generation reduction reaction of negative pole end.Reactant relates to reactant and the product of inert electrode surface mass, battery system, also has in addition solvent itself that redox reaction occurs.The redox reaction that relates to electrode will cause the corrosion of electrode material, the infringement of electrode.If the redox reaction of by-pass current has related to the solvent of electrochemical system, inorganic system can produce hydrogen and oxygen from water, forms mixed explosion gas.For non-aqueous system, organic solvent decomposes the electrochemical reaction that can pollute battery system itself.
In liquid stream battery stack inside, owing to having mismachining tolerance and assembling stack position error, therefore, liquid flows at main flow pipeline internal memory in larger flow resistance.Electrolyte is when the main flow pipeline enters the branch road of each monocell like this, and branch road flow stream velocity and pressure that apart from the main flow entrance, the speed of near branch road liquid stream and pressure ratio are far away apart from the main flow entrance want large.Like this, liquid between each monocell stream distributes inhomogeneous, causes between each monocell voltage inhomogeneous, voltage difference between the different monomers battery is increased, thereby reduce energy content of battery conversion efficiency.
On the other hand, the electrode of flow battery is a kind of carbon felt of Porous open structure, has larger flow resistance when electrolyte flows through electrode.If now between liquid flow frame and electrode, have gap, electrolyte will flow through from the gap between electrode and liquid flow frame, and common liquid flow frame reaction zone around without any structure that can stop that electrolyte flows through from the electrode side, thereby the reduction monocell reaction efficiency.In order to improve the energy efficiency of flow battery, just need to make the electrode that flows through of electrolyte maximum possible.
Summary of the invention
The utility model provides a kind of liquid flow frame structure of flow battery and the pile of composition thereof for solving above-mentioned defect of the prior art, its impedance of conductive path that makes electrolyte is enough greatly to reduce by-pass current, each monocell electrolyte of uniform distribution more, thereby the raising energy conversion efficiency, extend battery.
The utility model is that the adopted technical scheme that achieves the above object is:
A kind of liquid flow frame structure of flow battery, comprise anodal liquid flow frame and negative pole liquid flow frame, this positive pole liquid flow frame and the negative pole liquid flow frame structure that is centrosymmetric, and this positive pole liquid flow frame and negative pole liquid flow frame comprise respectively is located at the main flow pipeline that liquid flow frame is inner and be communicated with outside fluid reservoir, the entrance of this main flow pipeline is the liquid in-out mouth of being located at the liquid flow frame surface, this liquid in-out mouth is communicated with the distribution runner through pressure stabilizing cavity, profile of tooth restricted section, serpentine flow path successively, and this distributes runner to be communicated with reaction zone.
In such scheme, the side near reaction zone in this distribution runner is provided with distribution grid.
In such scheme, the top, both sides of this reaction zone is provided with liquid flow resistance spacer block, and the dual-side of reaction zone arranges flange.
In such scheme, this main flow pipeline is two, and is the upper/lower terminal that symmetry status is arranged at liquid flow frame.
In such scheme, this serpentine flow path is " bow " type.
In such scheme, this serpentine flow path can be done repeatedly crooked.This pressure stabilizing cavity can have multiple difformity.This profile of tooth restricted section can have multiple difformity.This flange can have multiple difformity, and this flange shape is identical or not identical, and spacing is equal or spacing is unequal.
The utility model also provides a kind of flow cell pile that adopts above-mentioned liquid flow frame structure.
The utility model is provided with pressure stabilizing cavity, profile of tooth restricted section and serpentine flow path in the arrival end of liquid flow frame main flow pipeline, and its effect is: pressure stabilizing cavity is stablized the pressure of each monocell entrance; Profile of tooth restricted section and serpentine flow path increase the resistance of branch road liquid runner.Both acting in conjunction results are the length that has increased built-in runner, play standard, the evenly effect of electrolyte, solved between different monomers because of the inhomogeneous technical barrier that causes voltage to have a long way to go of liquid stream, make pressure and flow between each monocell of battery pile even, finally reach the interior electrolyte of uniform distribution main flow pipeline to each monocell.
The utility model is provided with profile of tooth restricted section and serpentine flow path in the arrival end of liquid flow frame main flow pipeline, and its another effect is: thus the impedance of the conductive path of the conductive path increase electrolyte of lengthening electrolyte improves battery efficiency to reduce by-pass current.
The utility model is provided with liquid flow resistance spacer block and flange in liquid flow frame reaction zone side top, and its effect is: reduce the gap between liquid flow frame and carbon felt electrode, prevent that electrolyte from flowing through from the electrode side, make electrolyte flow through as much as possible the electrode side.Improve like this energy efficiency of monocell in the flow battery group, extended battery.
The accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of the utility model flow battery liquid flow frame embodiment mono-.
Fig. 2 is the Facad structure schematic diagram of the utility model flow battery liquid flow frame embodiment bis-.
1. liquid in-out mouths in figure, 2. pressure stabilizing cavity, 3. profile of tooth restricted section, 4. serpentine flow path, 5. liquid flow resistance spacer block, 6. flange, 7. distribution grid, 8. distribution runner, 9. reaction zone.
Embodiment
Below with reference to accompanying drawing, the utility model is carried out to comparatively detailed explanation.
As shown in Figure 1, the utility model flow battery liquid flow frame comprises anodal liquid flow frame and negative pole liquid flow frame, this positive pole liquid flow frame and the negative pole liquid flow frame structure that is centrosymmetric, and this positive pole liquid flow frame and negative pole liquid flow frame comprise respectively is located at the main flow pipeline that liquid flow frame is inner and be communicated with outside fluid reservoir, the entrance of this main flow pipeline is the liquid in-out mouth 1 of being located at the liquid flow frame surface, this liquid in-out mouth 1 is through pressure stabilizing cavity 2, profile of tooth restricted section 3, serpentine flow path 4 and distribute runner 8 to be communicated with, and this distributes runner 8 to be communicated with reaction zone 9.The interior side near reaction zone 9 of this distribution runner 8 is provided with distribution grid 7.Two side roof parts of this reaction zone 9 are provided with liquid flow resistance spacer block 5, and the dual-side of reaction zone (9) arranges flange 6.
Another embodiment that Fig. 2 is the utility model flow battery liquid flow frame, the first example structure that its general configuration and Fig. 1 show is identical, and difference only is that liquid in-out mouth 1 is located at medium position, and serpentine flow path 4 is " bow " type.
Adopt the described liquid flow frame structure of Fig. 1, Fig. 2, can be made into a kind of novel flow cell pile.
Electrolyte drives from fluid reservoir flows out through pump, while from liquid in-out mouth 1, flowing through the serpentine flow path 4 of liquid flow frame, at first enter the pressure stabilizing cavity 2 of serpentine flow path 4 fronts, then enter profile of tooth restricted section 3, be subject to the effect of liquid flow resistance spacer block 5 and distribution grid 7 after serpentine flow path 4, electrolyte enters and distributes runner 8.Electrolyte can all not enter immediately the electrochemical reaction district 9 of battery, but be subject to stopping of distribution grid 7 after entering and distributing runner 8, and part electrolyte can flow into the end that distributes runner 8.Electrolyte is before entering reaction zone 9 like this, and electrolyte can be full of whole distribution runner 8, thereby can make electrolyte keep even when entering reaction zone 9.After electrolyte enters reaction zone 9 at the uniform velocity equably, be furnished with flange 6 on side due to liquid flow frame reaction zone 9 and prevented that well electrolyte from passing through from the liquid flow frame side, when therefore electrolyte is by reaction zone 9, need all through electrode, and then by serpentine flow path 4, profile of tooth restricted section 3, pressure stabilizing cavity 2 enters liquid in-out mouth 1 and flows back to fluid reservoir.
When electrolyte is flowed through the serpentine flow path 4 of liquid flow frame from liquid in-out mouth 1, the pressure stabilizing cavity 2 of serpentine flow path 4 fronts and profile of tooth restricted section 3 play liquid storage, voltage stabilizing and three effects of current limliting, pressure and flowed fluctuation on the buffering sprue, electrolyte flow and pressure when entering each monocell are consistent, with the liquid stream of each monocell of uniform distribution.Although now entering the flow velocity of the liquid stream of each monocell is consistent with pressure, if now directly introduce reaction zone 9, will have the reaction dead angle and can't solve the excessive problem of by-pass current.And serpentine flow path 4 itself is repeatedly crooked (as shown in Figure 1 and Figure 2), also has profile of tooth restricted section 3 on it, increased as much as possible like this length of runner on limited liquid flow frame structure, thereby the impedance that has effectively increased the conductive path of electrolyte has reduced by-pass current.Electrolyte electrolyte after the serpentine flow path 4 lengthened can all not enter immediately the electrochemical reaction district 9 of battery, but be subject to stopping of distribution grid 7 after entering and distributing runner 8, and part electrolyte can flow into the end that distributes runner 8.Electrolyte is before entering reaction zone 9 like this, and electrolyte can be full of whole distribution runner 8, thereby can make electrolyte keep even when entering reaction zone 9.After electrolyte enters reaction zone 9 at the uniform velocity equably, be furnished with flange 6 on the side due to liquid flow frame reaction zone 9 and prevented that well electrolyte from passing through from the liquid flow frame side.
Visible, adopt structure of the present utility model not only to solve between monomer because of the inhomogeneous technical barrier that causes voltage to have a long way to go of liquid stream, make voltage difference between cell in very among a small circle, stability and the fail safe of vanadium cell have been increased substantially, and the impedance that has effectively increased the conductive path of electrolyte has reduced the self discharge that by-pass current reduces, and prevented that electrolyte from flowing through from the side of reaction zone, improved the reaction efficiency of electrolyte.
Claims (10)
1. the liquid flow frame structure of a flow battery, comprise anodal liquid flow frame and negative pole liquid flow frame, this positive pole liquid flow frame and the negative pole liquid flow frame structure that is centrosymmetric, and this positive pole liquid flow frame and negative pole liquid flow frame comprise respectively is located at the main flow pipeline that liquid flow frame is inner and be communicated with outside fluid reservoir, the entrance of this main flow pipeline is the liquid in-out mouth (1) of being located at the liquid flow frame surface, it is characterized in that, this liquid in-out mouth (1) is successively through pressure stabilizing cavity (2), profile of tooth restricted section (3), serpentine flow path (4) is communicated with distributing runner (8), this distributes runner (8) to be communicated with reaction zone (9).
2. the liquid flow frame structure of flow battery according to claim 1, is characterized in that, the side near reaction zone (9) in this distribution runner (8) is provided with distribution grid (7).
3. the liquid flow frame structure of flow battery according to claim 1 and 2, is characterized in that, the top, both sides of this reaction zone (9) is provided with liquid flow resistance spacer block (5), and the dual-side of this reaction zone (9) arranges flange (6).
4. the liquid flow frame structure of flow battery according to claim 1 and 2, is characterized in that, this main flow pipeline is two, and be the upper/lower terminal that symmetry status is arranged at liquid flow frame.
5. the liquid flow frame structure of flow battery according to claim 3, is characterized in that, this main flow pipeline is two, and be the upper/lower terminal that symmetry status is arranged at liquid flow frame.
6. the liquid flow frame structure of flow battery according to claim 1 and 2, is characterized in that, this serpentine flow path (4) is " bow " type.
7. the liquid flow frame structure of flow battery according to claim 3, is characterized in that, this serpentine flow path (4) is " bow " type.
8. the liquid flow frame structure of flow battery according to claim 4, is characterized in that, this serpentine flow path (4) is " bow " type.
9. the liquid flow frame structure of flow battery according to claim 5, is characterized in that, this serpentine flow path (4) is " bow " type.
10. a flow cell pile, is characterized in that, adopts the described liquid flow frame structure of claim 1-9 in this flow cell pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204919641U CN203367426U (en) | 2013-08-13 | 2013-08-13 | Flow frame structure of flow battery and electric pile comprising flow frame structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013204919641U CN203367426U (en) | 2013-08-13 | 2013-08-13 | Flow frame structure of flow battery and electric pile comprising flow frame structure |
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| CN203367426U true CN203367426U (en) | 2013-12-25 |
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| CN2013204919641U Withdrawn - After Issue CN203367426U (en) | 2013-08-13 | 2013-08-13 | Flow frame structure of flow battery and electric pile comprising flow frame structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390759A (en) * | 2013-08-13 | 2013-11-13 | 湖南省银峰新能源有限公司 | Liquid flow frame structure for flow cell and electric pile formed by flow cell |
| CN105261774A (en) * | 2015-09-07 | 2016-01-20 | 上海久能能源科技发展有限公司 | Plate cavity type flow battery energy storage system |
| CN110867594A (en) * | 2018-08-27 | 2020-03-06 | 大连融科储能装备有限公司 | Flow field structure of flow battery |
| CN113889641A (en) * | 2020-07-01 | 2022-01-04 | 中国科学院大连化学物理研究所 | Bipolar plate of flow battery pile |
-
2013
- 2013-08-13 CN CN2013204919641U patent/CN203367426U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390759A (en) * | 2013-08-13 | 2013-11-13 | 湖南省银峰新能源有限公司 | Liquid flow frame structure for flow cell and electric pile formed by flow cell |
| CN103390759B (en) * | 2013-08-13 | 2014-09-17 | 湖南省银峰新能源有限公司 | Liquid flow frame structure for flow cell and electric pile formed by flow cell |
| CN105261774A (en) * | 2015-09-07 | 2016-01-20 | 上海久能能源科技发展有限公司 | Plate cavity type flow battery energy storage system |
| CN110867594A (en) * | 2018-08-27 | 2020-03-06 | 大连融科储能装备有限公司 | Flow field structure of flow battery |
| CN113889641A (en) * | 2020-07-01 | 2022-01-04 | 中国科学院大连化学物理研究所 | Bipolar plate of flow battery pile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20140917 |
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| RGAV | Abandon patent right to avoid regrant |