CN104900892B - Flow battery electrolyte liquid sealing system and flow battery system - Google Patents
Flow battery electrolyte liquid sealing system and flow battery system Download PDFInfo
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- CN104900892B CN104900892B CN201410075336.4A CN201410075336A CN104900892B CN 104900892 B CN104900892 B CN 104900892B CN 201410075336 A CN201410075336 A CN 201410075336A CN 104900892 B CN104900892 B CN 104900892B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/028—Sealing means characterised by their material
- H01M8/0284—Organic resins; Organic polymers
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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
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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 invention discloses a kind of flow battery electrolyte liquid sealing system and flow battery system, the flow battery electrolyte liquid sealing system includes：It is arranged on the organic matter layer on the electrolyte liquid in negative pole storage tank；Connect the outlet of electrolyte liquid and the first pipeline of negative pole storage tank of pile；Described first pipeline one end is connected with the electrolyte liquid outlet of pile, and the other end is placed in electrolyte liquid；Connect the second pipeline of the electrolyte liquid entrance of negative pole storage tank and pile；The present invention on the electrolyte liquid in negative pole storage tank by setting organic matter layer, because liquid state organics molecule has good mobility and air-tightness, it ensure that preferable air exclusion effect of the electrolyte liquid to air, negative pole storage tank and positive pole storage tank are connected by connecting pipeline, it ensure that electrolyte liquid is in safety levels state, and compared with common flow battery system, capacity attenuation speed is reduced, with preferable safety in operation and stability.
Description
Technical field
The present invention relates to flow battery field, specially a kind of flow battery electrolyte liquid sealing system and flow battery
System.
Background technology
Growing demand of the modern economy social development to traditional energy so that the problem of traditional energy supply is not enough
Become increasingly conspicuous, people have to find the regenerative resource such as wind energy and solar energy.In recent years using wind energy and solar energy as representative
New energy has already taken up the one seat of energy resource supply, with increase in demand, and the ratio of new energy is still constantly increasing, but
It is influenceed by weather and the intermittent defect that causes to generate electricity still has, and has become the bottleneck for hindering its development.And liquid stream is electric
The huge energy storage advantage that pond possesses due to it, is received more and more attention, and constantly has MW grades of demonstrative projects and industrialization
Report occurs.The defect for developing into new energy of extensive liquid energy-storage technology provides good supplement, supporting extensive liquid
Galvanic battery energy storage device can ensure the steady output of the new energy such as wind energy and solar energy, realize the peak load shifting to power network.Its
In have the advantages that electrical power storage amount it is big, can deep discharge, power adjustable, long lifespan, the all-vanadium flow battery of easily maintenance,
Through one of one preferred technique as extensive energy storage.
Flow battery reaches electric energy and chemical transformation of energy by the chemical valence rise and reduction of active material ion, and it is closed
Key is constituted：Electrolyte, amberplex, electrode and collector plate etc..Active material is stored in the electrolytic solution, such as all-vanadium flow electricity
Pond just extremely V5+/V4+, negative pole is V3+/V2+；Siderochrome flow battery just extremely Fe3+/Fe2+, negative pole is Cr3+/Cr2+；Zinc
Bromine flow battery just extremely Br2/Br-, negative pole are Zn/Zn2+ etc..Positive solution intermediate ion changes to high-valence state during charging, for example
V4+ is converted to V5+, and electrolyte liquid intermediate ion changes to lower valency, and for example V3+ is converted to V2+, and simultaneous proton is not
Medium well into.Discharge process is then in contrast.Because negative solution is in charge and discharge process, lower valency ion（Such as V2+/V3+）
Electricity to that can exist always, and lower valency ion（Such as V2+, Fe2+, Cr2+）Easily reacted automatically with the oxygen in air
Generate highly charged ions（Such as V3+, Cr3+, Fe3+）So that the overall discharge capacity reduction of system, such as all-vanadium flow electricity
Pond cathode oxidation equation formula is 2V2++O2+4H+=2V3++2H2O.
In recent years, scientific research institutions have carried out many researchs for the sealing property of negative pole storage tank, but due to solution reservoir
Material characteristic, can not accomplish the positive confinement to electrolyte storage tank, European patent EP 0729648B1 in 1994 was once always for many years
Through mentioning the encapsulating method that a layer thickness that tiled on negative solution surface is about 50~300mm mineral oil, it is contemplated that utilize grease
Carry out the sealed prospect of electrolyte.Test proves that, due to the good fluidity and air-tightness of liquid fat, grease seal takes
The good effect for completely cutting off air to negative solution was obtained, but static test can not characterize feelings when battery system discharge and recharge is run
Condition, and characteristic-insulating properties, adhesiveness and mobility due to grease in itself, in addition to tank wall, flow battery system cyclic process
In should strictly avoid making grease from entering inside battery pile, otherwise grease contacts with carbon felt electrode and sticks to its surface, makes carbon
Felt loses conductive and catalysis, and irreversible injury such as power system capacity and efficiency will be caused drastically to decline to flow battery.
The content of the invention
The present invention is directed to the proposition of problem above, and develops a kind of flow battery electrolyte liquid sealing system and liquid stream electricity
Cell system.
The technological means of the present invention is as follows：
A kind of flow battery electrolyte liquid sealing system, including：
It is arranged on the organic matter layer on the electrolyte liquid in negative pole storage tank；
Connect the outlet of electrolyte liquid and the first pipeline of negative pole storage tank of pile；Described first pipeline one end and pile
The outlet of electrolyte liquid is connected, and the other end is placed in electrolyte liquid；
Connect the second pipeline of the electrolyte liquid entrance of negative pole storage tank and pile；
Further, it is at the working temperature liquid and water insoluble organic matter that the organic matter layer, which is, selected from long-chain
Or the alkanes of ring-type, alcohols, aldehydes, ethers, ketone, carboxylic acids, one kind in the derivative of esters and above organic matter or
It is a variety of；
Further, the density of the organic matter is less than 1.2g/cm at the working temperature3；The thickness of the organic matter layer
For 2~100mm.
Further, at the first pipeline other end is always positioned at below electrolyte liquid liquid level；
Further, the distance between the first pipeline other end and electrolyte liquid liquid level are with electrolyte liquid height
Ratio be less than 20%；
In addition, also including：
It is arranged on the connecting pipeline between negative pole storage tank and positive pole storage tank；
It is arranged on connecting pipeline, the magnetic valve for being turned on and off connecting pipeline；
In addition, also including：
It is arranged in negative pole storage tank, the liquid level gauge for monitoring the change of electrolyte liquid liquid level；
Magnetic valve and liquid level gauge are connected, for being equal to first when the electrolyte liquid liquid level that liquid level gauge is monitored is less than
Magnetic valve is controlled to open during liquid level, when the electrolyte liquid liquid level that liquid level gauge is monitored is optionally greater than after magnetic valve unlatching
The control unit of closed electromagnetic valve is controlled during the second liquid level；
Further, the pipeline portions being placed in above the organic matter layer in negative pole storage tank of first pipeline are using flexible
Pipe；
Further, it is provided with ball float outside the telescoping tube.
A kind of flow battery system, including the liquid stream described in pile, positive pole storage tank, negative pole storage tank and any of the above-described
GND electrolyte sealing system.
By adopting the above-described technical solution, flow battery electrolyte liquid sealing system and liquid the stream electricity that the present invention is provided
Cell system, by setting organic matter layer on the electrolyte liquid in negative pole storage tank, because liquid state organics molecule has well
Mobility and air-tightness, it is ensured that electrolyte liquid is connected to the preferable air exclusion effect of air by connecting pipeline
Negative pole storage tank and positive pole storage tank, control unit is according to electrolyte liquid fluid level condition to the magnetic valve that is arranged on connecting pipeline
The control of on off state, it is ensured that electrolyte liquid is in safety levels state, and compared with common flow battery system, drop
Low capacity attenuation speed, with preferable safety in operation and stability, the electrolyte liquid of first pipeline one end and pile
Outlet is connected, and the first pipeline other end can avoid electrolyte liquid band from moving at being always positioned at below electrolyte liquid liquid level
Organic molecule, which enters the phenomenon for causing carbon felt to lose conductive and catalysis inside pile, to be occurred.
Brief description of the drawings
Fig. 1 is the structural representation of flow battery system of the present invention；
Fig. 2 is change curve of the energy density in organic matter sealing experiment 1 with charge and discharge cycles number；
Fig. 3 is change curve of the efficiency in organic matter sealing experiment 1 with charge and discharge cycles number；
Fig. 4 is change curve of the energy density in organic matter sealing experiment 2 with charge and discharge cycles number；
Fig. 5 is change curve of the efficiency in organic matter sealing experiment 2 with charge and discharge cycles number.
In figure：1st, the first pipeline, 2, the outlet of electrolyte liquid, 3, pile, 4, liquid level gauge, 5, organic matter layer, 6, negative electricity
Solve liquid, 7, negative pole storage tank, the 8, second pipeline, 9, circulating pump, 10, control unit, 11, positive pole storage tank, 12, electrolyte liquid enters
Mouthful, 13, connecting pipeline, 14, anode electrolyte, 15, magnetic valve, 16, telescoping tube, 17, ball float.
Embodiment
A kind of flow battery electrolyte liquid sealing system as shown in Figure 1, including：It is arranged on negative in negative pole storage tank 7
Organic matter layer 5 on pole electrolyte 6；Connect electrolyte liquid outlet 2 and the first pipeline 1 of negative pole storage tank 7 of pile 3；It is described
The one end of first pipeline 1 is connected with the electrolyte liquid outlet 2 of pile 3, and the other end is placed in electrolyte liquid 6；Connect negative pole
Second pipeline 8 of storage tank 7 and the electrolyte liquid entrance 12 of pile 3；Further, the organic matter layer 5 is in operating temperature
It is down liquid and water insoluble organic matter, alkanes, alcohols, aldehydes, ethers, ketone, carboxylic acids selected from long-chain or ring-type,
One or more in the derivative of esters and above organic matter；Further, the density of the organic matter at the working temperature
Less than 1.2g/cm3；The operating temperature is 10~45 DEG C；The thickness of the organic matter layer is 2~100mm；Further, institute
The other end of the first pipeline 1 is stated to be always positioned at the liquid level of electrolyte liquid 6 lower section；Further, the other end of the first pipeline 1 with
The distance between liquid level of electrolyte liquid 6 is less than 20% with the ratio of the height of electrolyte liquid 6；In addition, also including：It is arranged on negative
Connecting pipeline 13 between pole storage tank 7 and positive pole storage tank 11；It is arranged on connecting pipeline 13, for being turned on and off connecting pipeline
13 magnetic valve 15；In addition, also including：It is arranged in negative pole storage tank 7, the liquid level for monitoring the change of the liquid level of electrolyte liquid 6
Meter 4；Magnetic valve 15 and liquid level gauge 4 are connected, for being equal to the when the liquid level of electrolyte liquid 6 that liquid level gauge 4 is monitored is less than
Magnetic valve 15 is controlled to open during one liquid level, when the liquid level of electrolyte liquid 6 that liquid level gauge 4 is monitored after the unlatching of magnetic valve 15
The control unit 10 for controlling magnetic valve 15 to close during optionally greater than the second liquid level；Further, first pipeline 1 is put
Pipeline portions above the organic matter layer 5 in negative pole storage tank 7 use telescoping tube 16；Further, the peripheral hardware of telescoping tube 16
It is equipped with ball float 17；Further, the telescoping tube 16 uses PP materials, the remainder of first pipeline 1 using UPVC,
The materials such as PPH or PE.
A kind of flow battery system, including described in pile 3, positive pole storage tank 11, negative pole storage tank 7 and any of the above-described
Flow battery electrolyte liquid sealing system；The flow battery system is preferably all-vanadium redox flow battery system.
Flow battery electrolyte liquid sealing system and flow battery system that the present invention is provided, by negative pole storage tank
Electrolyte liquid on organic matter layer is set, the thickness of the organic matter layer can be using value as 2~100mm, because liquid is organic
Thing molecule has good mobility and air-tightness, it is ensured that electrolyte liquid leads to the preferable air exclusion effect of air
Connecting pipeline connection negative pole storage tank and positive pole storage tank are crossed, control unit is according to electrolyte liquid fluid level condition to being arranged on communicating pipe
The control of the on off state of magnetic valve on road, it is ensured that electrolyte liquid be in safety levels state, and with common liquid stream
Battery system is compared, and reduces capacity attenuation speed, with preferable safety in operation and stability, first pipeline one end and electricity
The electrolyte liquid outlet of heap is connected, and the first pipeline other end can be avoided at being always positioned at below electrolyte liquid liquid level
Electrolyte liquid band moves organic molecule and enters inside pile and cause carbon felt to lose the conductive phenomenon with catalysis and occur；Enter
One step, the pipeline portions being placed in above the organic matter layer in negative pole storage tank of the first pipeline use telescoping tube, the telescoping tube
Be provided with ball float outside, then the decrement of the telescoping tube can according to electrolyte liquid and organic matter layer to the buoyancy size of ball float and
Change, when the liquid level of organic matter layer reaches preset maximum value, the decrement of the telescoping tube is maximum, when organic matter layer
Liquid level reaches that the decrement of telescoping tube during predetermined minimum is zero, it is ensured that the first tube outlet is in electrolyte liquid
Interior position can change with the change correspondence of electrolyte liquid liquid level, and wherein preset maximum value can work as electrolyte with value
Organic matter layer liquid level height value when liquid liquid level is away from the second line entry 200mm；Predetermined minimum can work as electrolyte with value
Organic matter layer liquid level height value during liquid build-up of fluid to initial liquid height；The structure of the telescoping tube can include outer tube and
The inner tube being placed in outer tube, said inner tube can be slided along outer tube wall, specific said inner tube can by set on outer tube wall 3
Bar depression slideway is moved up and down, and without departing from the center line of pipeline during ensureing that inner tube is slided, inner tube is at it away from inner tube bottom 300mm
Place sets ball float, and the inner tube that liquid level promotes telescoping tube to the buoyancy of ball float and had is moved up.
Organic matter layer of the present invention can be selected from long-chain or alkanes, alcohols, aldehydes, ethers, ketone, the carboxylic acid of ring-type
One or more in the derivative of class, esters and above organic matter；Wherein esters can be using vegetable fat or mineral grease etc.
Oil layer, above organic matter is respectively provided with insoluble in electrolyte liquid, and the characteristics of non-conductive and density is much smaller than electrolyte is for example oily
The density of fat is generally less than 1.0g/cm3, the density of electrolyte liquid is 1.3-1.4g/cm3, ensure that oil layer with certain thick
Degree tiles and floats on electrolyte liquid surface, makes it as flow battery system electrolyte liquid and the isolation material of air；
The electrolyte liquid outlet of first pipeline of the invention and the electrolyte liquid entrance of the second pipeline are in below organic matter layer, energy
It is enough preferably to prevent the electrolyte liquid come out from pile from being contacted with organic matter, and electrolyte liquid carrying organic molecule is extremely
The electrolyte liquid entrance of second pipeline, it is to avoid organic molecule is inhaled into the carbon felt of flow battery and changes carbon felt electricity
The property of pole, and then the phenomenon generation impacted to whole system.
The present invention further study 2kW grades of flow battery systems on the basis of the static storage experiment of prior art
The long-term discharge and recharge sealing operation test of dynamic, is examined under the conditions of sealed using organic matter layer, different temperatures, different operations
Discharge and recharge operation stability and energy attenuation situation, result of the test when battery system is circulated for a long time under parameter and different operation reserves
While showing that its capacity attenuation speed is substantially reduced compared with conventional seals mode, system has good safety in operation and stably
Property.
The specific embodiment of organic matter layer of the present invention is illustrated with reference to chart and experimental data；
Embodiment 1：
Table 1 is the test parameters table of organic matter leakage test 1, and Fig. 2 is energy density in organic matter sealing experiment 1 with filling
The change curve of discharge cycles number, Fig. 3 is change curve of the efficiency in organic matter sealing experiment 1 with charge and discharge cycles number
Figure, as shown in table 1, Fig. 2 and Fig. 3, premised on being sealed using organic matter layer, the organic matter uses esters, specially vegetable oil
（Main component is triglyceride）, the outlet of electrolyte liquid and the negative pole storage tank of pile are connected by the first pipeline, it is ensured that the
The electrolyte liquid outlet of one pipeline is always positioned at below electrolyte liquid liquid level, it is possible to achieve sealing system longtime running without
Flow battery is impacted, the flow battery system with negative pole storage tank seal system shows good anti-dioxygen oxidation
Fade performance, negative pole storage tank and positive pole storage tank are connected by connecting pipeline, anode electrolyte can be by connecting pipeline from just
Pole storage tank flows into experience in negative pole storage tank and mutually mixed after operation, and the capacity of system is recovered, the totality through over sampling detecting system
Valence state still tends to balance, i.e., the capacity attenuation amount that side reaction is caused is only equivalent to the 30% of normal operation mode.
The test parameters table of the organic matter leakage test 1 of table 1..
Embodiment 2
Table 2 is the test parameters table of organic matter sealing experiment 2, and Fig. 4 is energy density in organic matter sealing experiment 2 with filling
The change curve of discharge cycles number, Fig. 5 is change curve of the efficiency in organic matter sealing experiment 2 with charge and discharge cycles number
Figure, table 3 is decay and the efficiency data table of organic matter sealing experiment 2, as shown in table 2, Fig. 4, Fig. 5 and table 3, using organic matter layer
Premised on sealing, the organic matter uses esters, specially mineral oil, and organic matter layer is added and has installed electrolyte liquid
In negative pole storage tank, the outlet of electrolyte liquid and the negative pole storage tank of pile are connected by the first pipeline, connects negative by the second pipeline
The electrolyte liquid entrance of pole storage tank and pile, and negative pole storage tank and positive pole storage tank, negative pole storage tank are connected by connecting pipeline
Liquid level gauge is inside provided with, can be by monitoring the liquid of organic matter layer during practical application for monitoring the change of electrolyte liquid liquid level
The liquid level change of electrolyte liquid, control unit connection magnetic valve and liquid level gauge are known in position change, when bearing that liquid level gauge is monitored
Pole electrolyte liquid level is less than control magnetic valve when being equal to the first liquid level and opened, when liquid level gauge institute after magnetic valve unlatching
The electrolyte liquid liquid level of monitoring controls closed electromagnetic valve when being optionally greater than the second liquid level, it is assumed that initial electrolyte liquid level
Distance to the second line entry is A, then when electrolyte liquid level drops to A/2, and control unit control magnetic valve is opened, just
Anode electrolyte in the storage tank of pole is automatically flowed into negative pole storage tank by connecting pipeline, to keep the liquid level of electrolyte liquid to be in
Safe altitude, when electrolyte liquid recovers to initial liquid height A, control unit control closed electromagnetic valve, wherein A is described
The second liquid level, A/2 be the first described liquid level, according to experimental result it can be seen that by connect positive pole storage tank and
The connecting pipeline and control unit of negative pole storage tank are according to electrolyte liquid fluid level condition to the electromagnetism that is arranged on connecting pipeline
The control of the on off state of valve, it is ensured that electrolyte liquid is in safety levels state, at interval of several charge and discharge cycles, is
Anode electrolyte in positive pole storage tank is transferred in negative pole storage tank by system automatically, before with organic matter layer sealing electrolyte liquid
Condition is put forward, compared with common flow battery system, with preferable anti-decay property and safety in operation.
The test parameters table of the organic matter sealing experiment 2 of table 2..
The decay of the organic matter sealing experiment 2 of table 3. and efficiency data table.
CE is coulombic efficiency in table 3, represents discharge capacity and charging capacity Ah ratio, in this leakage test, can be with
Represent after long term storage after charging, whether discharge capacity can keep；EE is energy efficiency, represents discharge energy and rechargeable energy
Wh ratio, the in this experiment same CE of measuring mechanism；VE is voltage efficiency, represents electric discharge average voltage and charging average voltage
Ratio, it can be seen that using electrolyte liquid sealing system on flow battery system efficiency without influence.
Embodiment 3
Table 4 is the test parameters table of organic matter sealing experiment 3, and table 5 is the result of the test data of organic matter sealing experiment 3
Table, is protected to investigate discharge capacity of the flow battery system with negative pole storage tank seal system after full charge during long term storage
Situation is held, as shown in table 4, table 5, organic matter is using esters and the mixture of alkanes, and specially soybean oil and dodecane is mixed
Compound, experiment uses 2kW flow battery systems, and after system charging, now divalent vanadium V2+ has reached necessarily in electrolyte liquid
Concentration, system discharge program is shelved, and circulating pump stops, and is again started up circulating pump and discharge procedures after standing a period of time, is examined
Examine the situation of change of systematic parameter.
The test parameters table of the organic matter sealing experiment 3 of table 4..
| Project | Numerical value |
| Solution temperature | Room temperature (28-35 DEG C) |
| Both positive and negative polarity volume | Each 40L in the two poles of the earth |
| The power of battery | 2kw |
| Organic matter classification | Soybean oil+dodecane |
| Organic matter layer thickness | 15mm |
The result of the test tables of data of the organic matter sealing experiment 3 of table 5..
CE is coulombic efficiency in table 5, represents discharge capacity and charging capacity Ah ratio, in this leakage test, can be with
Represent after long term storage after charging, whether discharge capacity can keep；EE is energy efficiency, represents discharge energy and rechargeable energy
Wh ratio, the in this experiment same CE of measuring mechanism.
Embodiment 4
Using the circuit design in embodiment 1, table 6 is the test parameters table of organic matter sealing experiment 4, and table 7 is organic matter
The result of the test tables of data of sealing experiment 4, as shown in table 6, organic matter use alcohols, specially cyclopentanol, result of the test such as table 7
It is shown.
The test parameters table of the organic matter sealing experiment 4 of table 6..
| Project | Numerical value |
| Solution temperature | Room temperature (35-40 DEG C) |
| Both positive and negative polarity volume | Each 40L in the two poles of the earth |
| The power of battery | 2kw |
| Organic matter classification | Cyclopentanol |
| Organic matter layer thickness | 10mm |
The result of the test tables of data of the organic matter sealing experiment 4 of table 7..
Embodiment 5
Table 8 is the test parameters table of organic matter sealing experiment 5, and table 9 is decay and the efficiency data of organic matter sealing experiment 5
Table, as shown in table 8, table 9, organic matter uses alkanes, specially normal octane.
The test parameters table of the organic matter sealing experiment 5 of table 8..
The decay of the organic matter sealing experiment 5 of table 9. and efficiency data table.
Embodiment 6
Table 10 is the test parameters table of organic matter sealing experiment 6, and table 11 is decay and the efficiency numbers of organic matter sealing experiment 6
According to table, as shown in table 10, table 11, organic matter uses ethers, specially positive propyl ether.
The test parameters table of the organic matter sealing experiment 6 of table 10..
The decay of the organic matter sealing experiment 6 of table 11. and efficiency data table,
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (9)
1. a kind of flow battery electrolyte liquid sealing system, it is characterised in that including：
It is arranged on the organic matter layer (5) on the electrolyte liquid (6) in negative pole storage tank (7)；
Connect electrolyte liquid outlet (2) and the first pipeline (1) of negative pole storage tank (7) of pile (3)；First pipeline (1)
One end is connected with the electrolyte liquid outlet (2) of pile (3), and the other end is placed in negative pole storage tank (7)；
Connect the second pipeline (8) of negative pole storage tank (7) and the electrolyte liquid entrance (12) of pile (3)；First pipeline (1)
At the other end is always positioned at below electrolyte liquid (6) liquid level.
2. a kind of flow battery electrolyte liquid sealing system according to claim 1, it is characterised in that the organic matter
It is at the working temperature liquid and water insoluble organic matter that layer (5), which is, alkanes, alcohols, aldehydes selected from long-chain or ring-type,
One or more in ethers, ketone, carboxylic acids, the derivative of esters and above organic matter.
3. flow battery electrolyte liquid sealing system according to claim 2, it is characterised in that institute at the working temperature
The density for stating organic matter is less than 1.2g/cm3；The thickness of the organic matter layer is 2~100mm.
4. a kind of flow battery electrolyte liquid sealing system according to claim 1, it is characterised in that first pipe
The distance between road (1) other end and electrolyte liquid (6) liquid level are less than 20% with the ratio of electrolyte liquid (6) height.
5. a kind of flow battery electrolyte liquid sealing system according to claim 1, it is characterised in that also include：
It is arranged on the connecting pipeline (13) between negative pole storage tank (7) and positive pole storage tank (11)；
It is arranged on connecting pipeline (13), the magnetic valve (15) for being turned on and off connecting pipeline (13).
6. a kind of flow battery electrolyte liquid sealing system according to claim 5, it is characterised in that also include：
It is arranged in negative pole storage tank (7), the liquid level gauge (4) for monitoring the change of electrolyte liquid (6) liquid level；
Magnetic valve (15) and liquid level gauge (4) is connected, electrolyte liquid (6) liquid level for being monitored when liquid level gauge (4) is low
Magnetic valve (15) is controlled to open when equal to the first liquid level, what magnetic valve (15) was monitored after opening when liquid level gauge (4)
The control unit (10) that control magnetic valve (15) is closed when electrolyte liquid (6) liquid level is optionally greater than the second liquid level.
7. a kind of flow battery electrolyte liquid sealing system according to claim 1, it is characterised in that first pipe
The pipeline portions of the organic matter layer (5) being placed in negative pole storage tank (7) on road (1) above use telescoping tube (16).
8. a kind of flow battery electrolyte liquid sealing system according to claim 7, it is characterised in that the telescoping tube
(16) ball float (17) is provided with outside.
9. a kind of flow battery system, it is characterised in that including pile (3), positive pole storage tank (11), negative pole storage tank (7), Yi Jiquan
Profit requires the flow battery electrolyte liquid sealing system described in 1 to 8 any one.
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| US11784341B2 (en) * | 2015-12-08 | 2023-10-10 | The Chinese University Of Hong Kong | High-energy density and low-cost flow electrochemical devices with moving rechargeable anode and cathode belts |
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| CN107195932B (en) * | 2016-03-14 | 2019-12-31 | 大连融科储能技术发展有限公司 | Method and system for stably regulating and controlling capacity of flow battery and flow battery |
| CN106252690A (en) * | 2016-08-12 | 2016-12-21 | 清华大学深圳研究生院 | A kind of method and system extending all-vanadium flow battery cycle life |
| CN106654314B (en) * | 2016-11-04 | 2019-05-24 | 大连融科储能技术发展有限公司 | Electrolyte storage tank and flow battery |
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| CN114497645A (en) * | 2020-11-12 | 2022-05-13 | 中国科学院大连化学物理研究所 | Efficient operation method of flow battery |
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