CN201383523Y - Current breaker for shunt current of flow battery - Google Patents
Current breaker for shunt current of flow battery Download PDFInfo
- Publication number
- CN201383523Y CN201383523Y CN200820136764U CN200820136764U CN201383523Y CN 201383523 Y CN201383523 Y CN 201383523Y CN 200820136764 U CN200820136764 U CN 200820136764U CN 200820136764 U CN200820136764 U CN 200820136764U CN 201383523 Y CN201383523 Y CN 201383523Y
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- China
- Prior art keywords
- flow
- pass current
- gas
- flow battery
- column chamber
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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
A current breaker for shunt current of a flow battery comprises a stream guidance structure, a shunt structure and a gas column chamber, wherein, the stream guidance structure is a channel, and liquid streams flow in and out the current breaker for shunt current through the channel; the shunt structure is used for dividing the liquid streams that flow in into a plurality of fluid bodies; and the gas column chamber leads the liquid streams that flow in from the shunt structure to generate air gaps, so that the electrical isolation is achieved between the fluid bodies positioned at the upper part and the lower part when the liquid streams flow. Electrolyte continuously flows among a storage tank and individual cells when the flow battery operates; and the current breaker for shunt current is arranged among the individual cells and galvanic piles and can prevent shunt current generation arising from electrolyte serially flowing among the individual cells. The current breaker for shunt current of the flow battery has the advantages of simple manufacturing technique, low cost and the like, can be used for avoiding shunt current that is generated when the electrolyte solution flows is shared among the individual cells and the galvanic piles of the flow battery, and can also be used for any occasions that the electrical isolation between the upsteam and the downstream of the uninterruptedly running electrolyte solution is needed.
Description
Technical field
The utility model is a kind of flow battery by-pass current cutout, relates to the solution of self-discharge of battery problem in the flow battery, specially refers to the elimination of by-pass current in the flow battery.
Background technology
Along with The development in society and economy, people are more and more higher to the demand of electric energy.And electricity needs differs greatly round the clock, but the construction scale in power plant must be complementary with the peak electricity consumption, and it is lower to invest big utilance.On the other hand, along with the continuous exhaustion of fossil energy, people to the development and utilization of regenerative resources such as wind energy, water energy, solar energy more and more widely.Be to guarantee the stable power-supplying of renewable energy systems such as solar energy, wind energy, just must exploitation efficient, cheap, pollute less and safe and reliable energy storage technology, the peak-clipping and valley-filling of electrical network, balanced load also press for the extensive energy storage technology of exploitation.Make a general survey of various dissimilar chemical storage batteries, flow battery becomes one of storage battery of the extensive energy storage of optimum with its special advantages.
Liquid accumulator cell claims liquid stream redox cell again, can be called for short liquid stream electric power storage station or flow battery, is Thaller L.H. (NASA Lewis Research Center, Cleveland, US) a kind of electrochemical energy storage notion of Ti Chuing in 1974.The core of liquid accumulator cell is that the active material that carries out oxidation-reduction reaction, realization charge and discharge process is present in the electrolyte, and monocell or half-cell electrode are just as the place that reacts, rather than the place of active material storage.Because active material is stored in the electrolyte, flow battery has advantages such as power separates with capacity, the life-span is long.As all-vanadium flow battery (US006764789), anodal reaction is V
5+And V
4+Between redox, negative reaction is V
2+And V
3+Between redox, the active material of positive and negative electrode all is dissolved in the solution, the redox reaction of both positive and negative polarity occurs in (as the carbon felt) on the inertia collector.Anodal electrolyte (comprises V
5+And V
4+Solution) with negative pole electrolyte (comprise V
2+And V
3+Solution) store respectively, separate with amberplex between the positive and negative electrode of battery cell, mix in battery with the electrolyte of avoiding positive minus zone.
In extensive flow battery energy storage system, often need be with a series of monocell series and parallels, its series system has two class formations.First single flow battery, the shared electrolyte of its positive and negative electrode; It two is double flow batteries, and its anodal and negative pole respectively has an electrolyte, separates with amberplex between the positive and negative electrolyte.In these two kinds of structures, battery system all needs electrolyte to circulate in the whole stack system, be that electrolyte flows into pile by intake header, through entering in the storage tank by outlet header's outflow behind the pile, the method that promptly adopts unified supply electrolyte to give each monocell.Adopt the pile system of unified supply electrolyte to have many good qualities, mainly comprise: the unusual homogeneous of the supply of each monocell reactant in the system, and product is easy to remove; The heat conduction efficiency height makes that the cooling of system and heat management system are simple; Can adopt electronic control system cheaply; In addition, can obtain the metal deposition of homogeneous for the metal deposition system.But, unified supply electrolyte exists shared electrolyte to import and export house steward when giving each monocell, their existence makes inside battery produce by-pass current (shunt current or leakage current), causes self-discharge of battery, causes the battery capacity partial loss.The generation of by-pass current also causes other problems: because potential difference is big between terminal anode and negative electrode, direct electrolyte passage is arranged again, can produce the electrochemical reaction that is different from battery system itself this moment on the two poles of the earth.These are reflected at the high current density place and take place, and are in the electrode generation oxidation reaction of positive terminal, are in the electrode generation reduction reaction of negative pole end.Reactant relates to the reactant and the product of inert electrode surface mass, battery system, also has solvent itself that redox reaction takes place in addition.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, then 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.The generation of by-pass current has also weakened the capacity of battery system, particularly is in the monocell of battery system mid portion.The generation of by-pass current is defective and the difficult point in the flow battery system, should be eliminated in pile.
The generation of by-pass current mainly is because there is shared electrolyte passage to cause, and therefore, eliminating shared electrolyte passage or electrolyte passage interrupted becomes the thinking cutting point that the researcher considers to solve the by-pass current problem.Reduce method that by-pass current often takes and be the design battery structure and make that the impedance of conductive path of electrolyte is enough big, generally be that design gives the feed pipe of each battery not only long but also narrow to increase resistance, at feed tube and drain pipe the bubble section being set, rotary valve etc. is set also is the thinking that increases resistance, yet this has increased the energy consumption of the resistance and the pump of fluid.Another method is to take the method for guard electrode, promptly produces on third electrode and by-pass current equidirectional and big or small electric potential gradient.But these methods all just reduce by-pass current, and can not eliminate by-pass current fully.The quantity of pump and storage tank can reduce the monomer and the pile number that participate in bypass, thereby reduce by-pass current in monomer number in the minimizing pile, the increase flow battery system.But this method has increased the quantity of pump and storage tank, and cost increases, usefulness reduces.
Consider that the electrolyte flow of blocking flow battery can eliminate by-pass current fully, we have designed the present invention, with air gap the electrolyte solution upstream and downstream that flows are separated, thereby are made electrolyte solution upstream and downstream electric insulation.
Summary of the invention
The purpose of this utility model is to propose a kind of square device of eliminating the flow battery by-pass current fully, it is a kind of flow battery by-pass current cutout, install a flow battery by-pass current cutout additional at each monocell electrolyte turnover pipe place, adopt the electrolyte cutout to enter, the mode that gas cuts off stops the connection between the electrolyte among feed liquor house steward or the fluid house steward.The principle that the present invention adopts is: the flow velocity of controlling liquid, cause liquid to spray downward or upward to flow and be droplet-like, utilize air gap that continuous liquid is become discrete state, so just make electrolyte solution upstream and downstream electric insulation, the by-pass current that can stop flow battery to cause fully because of shared electrolyte.
The purpose of this utility model realizes by following manner:
A kind of flow battery by-pass current cutout, constitute by flow-guiding structure, the gentle column compartment of flow dividing structure, wherein flow-guiding structure is the passage that liquid stream flowed into and flowed out the by-pass current cutout, flow dividing structure is to flow into the structure that liquid stream is divided into a plurality of fluids, the gas column chamber makes the liquid that flows into from the flow dividing structure angry crack of miscarrying, thereby makes two parts fluid electric insulation up and down under the situation that liquid stream flows.
When electrolyte solution flowed into the gas column chamber by the flow dividing structure of flow battery by-pass current cutout, fluid was in the state that upwards sprays or spray downwards, and promptly the spray liquid direction is consistent with gravity direction or on the contrary.
The material of preparation flow battery by-pass current cutout is an insulating material, and can tolerate chemistry and electrochemical corrosion.
When outlet of the flow-guiding structure of flow battery by-pass current cutout and inlet sealing, whole flow battery by-pass current cutout is a sealed cavity, and is airtight, also saturating solution.
Can there be intake valve appropriate location in the gas column chamber of flow battery by-pass current cutout, and to regulate the indoor gas-liquid interface of gas column, when the gas-liquid interface adjustment was finished, intake valve need be in closed condition.
Can there be air outlet valve appropriate location in the gas column chamber of flow battery by-pass current cutout, and to regulate the indoor gas-liquid interface height of gas column, when the gas-liquid interface adjustment was finished, air outlet valve need be in closed condition.Intake valve and air outlet valve can possess simultaneously, and this moment, specific atmosphere can be filled to satisfy specific demand in the gas column chamber of flow battery by-pass current cutout.
There is gas-liquid separator bottom in the gas column chamber of flow battery by-pass current cutout, gas constantly can not taken away during column compartment so that flow of solution is given vent to anger.
The utility model can be eliminated the flow battery by-pass current fully, has overcome to adopt long narrow feed pipe to increase the shortcoming that liquid resistance causes the fluid resistance increase and increases the pump energy consumption.This flow battery by-pass current cutout has simple, the low cost and other advantages of manufacturing process, can be used to eliminate the by-pass current that shared electrolyte solution causes that passes through between each monomer of flow battery, each pile, also can be used for the occasion that any needs make electric insulation between the uninterrupted electrolyte solution upstream and downstream that flows.
Description of drawings
A kind of flow battery by-pass current of Fig. 1 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure, 8. intake valve, 9. air outlet valve
A kind of flow battery by-pass current of Fig. 2 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure
A kind of flow battery by-pass current of Fig. 3 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure, 8. intake valve, 9. air outlet valve
A kind of flow battery by-pass current of Fig. 4 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure, 8. intake valve, 9. air outlet valve
A kind of flow battery by-pass current of Fig. 5 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure
A kind of flow battery by-pass current of Fig. 6 cutout
1. inflow flow-guiding structure, 2. liquid flow path direction, 3. flow dividing structure, 4. gas-liquid interface, 5. gas column chamber, 6. gas-liquid separator 7. flows out flow-guiding structure, 8. intake valve, 9. air outlet valve
Embodiment
Embodiment
As Fig. 1, available polymethyl methacrylate comes working fluid galvanic battery by-pass current cutout, so that concrete enforcement of the present utility model to be described.Flow into the making of flow-guiding structure 1: with the lucite tube drainage tube that gas column chamber 5 is gone in 1 drainage as the inflow flow-guiding structure.With horn mouth structure of cylindrical polymethyl methacrylate processing, wherein the external diameter of the diameter of an end and drainage tube cooperates and bonds together, the flared end internal diameter is about 1.5～5 times of drainage round tube inside diameter, and the polymethyl methacrylate sheet of a plurality of mesh is arranged so that flow of solution can spray into gas column chamber 5 after flowing into flow-guiding structure 1 bonding one of flared end.Flow out the making of flow-guiding structure 7: with the lucite tube identical with the drainage tube that flows into flow-guiding structure 1 as flowing out flow-guiding structure 7.The making of gas column chamber 5: get an internal diameter and be about the drainage tube external diameter 3-10 cylindrical lucite tube doubly that flows into flow-guiding structure 1 main body as gas column chamber 5, make two circular seal plates, have two valves as intake valve 8 and air outlet valve 9 on the sealing upper plate, the sealing lower plate has the hole of matching with the drainage tube external diameter that flows into flow-guiding structure 1.Cylindrical drum side-wall hole in gas column chamber 5, the aperture cooperates with the external diameter that flows out flow-guiding structure 7.The making of gas-liquid separator 6: get the polymethyl methacrylate disk more smaller,, on disk, process densely covered aperture in processing of disk center and the hole that the drainage tube that flows into flow-guiding structure 1 matches than the cylindrical drum internal diameter of gas column chamber 5.Assemble sequence: the correct position that gas-liquid separator 6 is bonded in the drainage tube that flows into flow-guiding structure 1, the drainage tube that flows into flow-guiding structure 1 is bonded on the hole of sealing lower plate of gas column chamber 5, then will seal on the cylindrical drum that lower plate is bonded in gas column chamber 5, the sealing upper plate is bonded on the cylindrical drum of gas column chamber 5, will flows out flow-guiding structure 7 at last and be bonded on the cylindrical drum sidewall of gas column chamber 5.Zhi Bei flow battery by-pass current cutout has characteristics simple in structure, that cost is low like this, can be used to eliminate the by-pass current that shared electrolyte solution causes that passes through between each monomer of flow battery, each pile, also can be used for the occasion that any needs make electric insulation between the uninterrupted electrolyte solution upstream and downstream that flows.
As Fig. 2, inflow flow-guiding structure 1 can be made into by the top drainage goes into gas column chamber 5, and its mouth spray can be made into multitube and sprays downwards; Can make the outflow down of the liquid flow direction with flowing out flow-guiding structure 7 as required; Can not establish intake valve 8 and air outlet valve 9 on the gas column chamber 5.As Fig. 3, the mouth spray that flows into flow-guiding structure 1 can be made into the porous sphere and sprays downwards.As Fig. 4, can on gas column chamber 5, establish intake valve 8 and air outlet valve 9 (comparing) with Fig. 2.As Fig. 5, can not establish intake valve 8 and air outlet valve 9 (comparing) on the gas column chamber 5 with Fig. 3.As Fig. 6, can make the upward outflow of the liquid flow direction with flowing out flow-guiding structure 7 as required.
Claims (3)
1, a kind of flow battery by-pass current cutout, it is characterized in that this cutout is by flowing into flow-guiding structure (1), flow dividing structure (3), gas column chamber (5), gas-liquid separator (6) and outflow flow-guiding structure (7) constitute, wherein flowing into flow-guiding structure (1) is the passage that liquid stream flows into the by-pass current cutout, flowing out flow-guiding structure (7) is the passage that liquid stream flows out the by-pass current cutout, flow dividing structure (3) is to flow into the structure that liquid stream is divided into a plurality of fluids, gas column chamber (5) makes the liquid that flows into from flow dividing structure (3) the angry crack of miscarrying, thereby makes two parts fluid electric insulation up and down under the situation that liquid stream flows; There is gas-liquid separator (6) bottom of gas column chamber (5), and the column compartment so that flow of solution is given vent to anger (5) Shi Buhui constantly takes away gas, and there are intake valve (8), air outlet valve (9) in the top of gas column chamber (5), to regulate the height of the gas-liquid interface (4) in the gas column chamber (5).
2, a kind of flow battery by-pass current cutout according to claim 1, when it is characterized in that fluid flows into gas column chamber (5) by the flow dividing structure (3) of flow battery by-pass current cutout, fluid is in the state that upwards sprays or spray downwards.
3, a kind of flow battery by-pass current cutout according to claim 1, it is characterized in that when the outlet of the outflow flow-guiding structure (7) of flow battery by-pass current cutout and when flowing into the inlet sealing of flow-guiding structure (1), whole flow battery by-pass current cutout is a sealed cavity, airtight, also not saturating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820136764U CN201383523Y (en) | 2008-09-18 | 2008-09-18 | Current breaker for shunt current of flow battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820136764U CN201383523Y (en) | 2008-09-18 | 2008-09-18 | Current breaker for shunt current of flow battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201383523Y true CN201383523Y (en) | 2010-01-13 |
Family
ID=41526994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820136764U Expired - Fee Related CN201383523Y (en) | 2008-09-18 | 2008-09-18 | Current breaker for shunt current of flow battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201383523Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629701A (en) * | 2011-02-04 | 2012-08-08 | 流体公司 | Electrochemical cell system with shunt current interrupt |
| EP3131146A1 (en) * | 2015-08-14 | 2017-02-15 | Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan | Flow battery apparatus with shunted current repressed and method thereof |
| CN114497654A (en) * | 2022-04-06 | 2022-05-13 | 杭州德海艾科能源科技有限公司 | Liquid path current blocker |
-
2008
- 2008-09-18 CN CN200820136764U patent/CN201383523Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629701A (en) * | 2011-02-04 | 2012-08-08 | 流体公司 | Electrochemical cell system with shunt current interrupt |
| CN102629701B (en) * | 2011-02-04 | 2016-08-17 | 流体公司 | There is the electrochemical cell system that branch current interrupts |
| EP3131146A1 (en) * | 2015-08-14 | 2017-02-15 | Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan | Flow battery apparatus with shunted current repressed and method thereof |
| TWI575807B (en) * | 2015-08-14 | 2017-03-21 | 行政院原子能委員會核能研究所 | Flow battery apparatus with shunted current repressed and method thereof |
| CN114497654A (en) * | 2022-04-06 | 2022-05-13 | 杭州德海艾科能源科技有限公司 | Liquid path current blocker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100113 Termination date: 20170918 |