CN104900892A - Flow battery negative electrolyte solution sealing system and flow battery system - Google Patents
Flow battery negative electrolyte solution sealing system and flow battery system Download PDFInfo
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- CN104900892A CN104900892A CN201410075336.4A CN201410075336A CN104900892A CN 104900892 A CN104900892 A CN 104900892A CN 201410075336 A CN201410075336 A CN 201410075336A CN 104900892 A CN104900892 A CN 104900892A
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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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- 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
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Abstract
The invention discloses a flow battery negative electrolyte solution sealing system and a flow battery system. The flow battery negative electrolyte solution sealing system comprises: an organic matter layer disposed on the negative electrolyte solution in a negative storage tank; a first pipeline connected to the negative electrolyte solution outlet of an electric pile and the negative storage tank, with one end of the first pipeline connected to the negative electrolyte solution outlet of the electric pile and the other end placed in the negative electrolyte solution; and a second pipeline connected to the negative storage tank and the negative electrolyte solution inlet of the electric pile. According to the invention, the organic matter layer is disposed on the negative electrolyte solution in the negative storage tank, and liquid state organic molecules have good fluidity and air tightness, thus ensuring good air isolation effect of the negative electrolyte solution to air, and the negative storage tank and a positive storage tank are connected by pipelines, thus ensuring the negative electrolyte solution in a safe liquid level state. Also compared with common flow battery systems, the capacity fading speed is reduced, and the flow battery system provided by the invention has good operation safety and stability.
Description
Technical field
The present invention relates to flow battery field, be specially a kind of flow battery electrolyte liquid sealing system and flow battery system.
Background technology
Modern economy social development, to the growing demand of traditional energy, makes the problem of traditional energy undersupply become increasingly conspicuous, and people have to find the regenerative resource such as wind energy and solar energy.The new forms of energy being representative with wind energy and solar energy in recent years have occupied the one seat of energy resource supply, along with increase in demand, the ratio of new forms of energy is still in continuous increase, but it causes the intermittent defect of generating still to exist by weather effect, become the bottleneck hindering its development.And the huge energy storage advantage that flow battery possesses due to it, receive increasing concern, and constantly have the report of MW level demonstrative project and industrialization to occur.The defect developing into new forms of energy of extensive liquid energy-storage technology provides well supplements, and supporting extensive flow battery energy storage device can ensure the steady output of the new forms of energy such as wind energy and solar energy, realizes the peak load shifting to electrical network.Wherein have electrical power storage amount large, can deep discharge, power adjustable, life-span all-vanadium flow battery that is long, the easily advantage such as maintenance, become one of one preferred technique of extensive energy storage.
Flow battery is raised by the chemical valence of active material ion and reduction reaches electric energy and chemical transformation of energy, and its key consists of: electrolyte, amberplex, electrode and collector plate etc.Active material stores in the electrolytic solution, and as all-vanadium flow battery just very V5+/V4+, negative pole is V3+/V2+; Siderochrome flow battery just very Fe3+/Fe2+, negative pole is Cr3+/Cr2+; Zinc-bromine flow battery just very Br2/Br-, negative pole is Zn/Zn2+ etc.During charging, positive solution intermediate ion changes to high-valence state, and such as V4+ transforms to V5+, and electrolyte liquid intermediate ion changes to lower valency, and such as V3+ transforms to V2+, the continuous generation of simultaneous proton.Discharge process then in contrast.Because negative solution is in charge and discharge process, lower valency ion (such as V2+/V3+) electricity is to can exist always, and lower valency ion (such as V2+, Fe2+, Cr2+) very easily reacts with the oxygen in air and automatically generates highly charged ions (such as V3+, Cr3+, Fe3+ etc.), the discharge capacity of overall system is reduced, and such as all-vanadium flow battery cathode oxidation equation formula is 2V2++O2+4H+=2V3++2H2O.
In recent years, scientific research institutions have carried out many research for the sealing property of negative pole storage tank, but due to the material characteristic of solution reservoir, the positive confinement to electrolyte storage tank cannot be accomplished for many years always, within 1994, European patent EP 0729648B1 once mentioned the encapsulating method being about 50 ~ 300mm mineral oil in negative solution surface tiling a layer thickness, contemplated the prospect utilizing grease to carry out electrolyte sealing.Prove through overtesting, due to good fluidity and the air-tightness of liquid fat, grease seal achieves the effect that good anticathode solution completely cuts off air, but static test cannot the discharge and recharge of characterizing battery system run time situation, and due to the characteristic-insulating properties of grease itself, adhesiveness and mobility, except tank wall, should strictly avoid in flow battery system cyclic process making grease enter battery pile inside, otherwise grease contacts with carbon felt electrode and sticks to its surface, carbon felt is made to lose conduction and catalysis, irreversible injury such as power system capacity and efficiency will be caused sharply to decline to flow battery.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of flow battery electrolyte liquid sealing system and flow battery system.
Technological means of the present invention is as follows:
A kind of flow battery electrolyte liquid sealing system, comprising:
Be arranged on the organic matter layer on the electrolyte liquid in negative pole storage tank;
Connect the electrolyte liquid outlet of pile and the first pipeline of negative pole storage tank; Described first pipeline one end exports with the electrolyte liquid of pile and 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, described organic matter layer is be liquid at the working temperature and water-fast organic substance, is selected from one or more in the alkanes of long-chain or ring-type, alcohols, aldehydes, ethers, ketone, carboxylic acids, ester class and above organic derivative;
Further, described organic density is less than 1.2g/cm at the working temperature
3; The thickness of described organic matter layer is 2 ~ 100mm.
Further, the described first pipeline other end is positioned at all the time below electrolyte liquid liquid level and locates;
Further, the distance between the described first pipeline other end and electrolyte liquid liquid level is less than 20% with the ratio of electrolyte liquid height;
In addition, also comprise:
Be arranged on the connecting pipeline between negative pole storage tank and positive pole storage tank;
Be arranged on connecting pipeline, for opening or close the electromagnetically operated valve of connecting pipeline;
In addition, also comprise:
Be arranged in negative pole storage tank, for monitoring the liquid level gauge of electrolyte liquid liquid level change;
Connected electromagnetic valve and liquid level gauge, open lower than Controlling solenoid valve when equaling the first liquid level for the electrolyte liquid liquid level of monitoring when liquid level gauge, electromagnetically operated valve open after when the electrolyte liquid liquid level that liquid level gauge is monitored is higher than the control unit controlling closed electromagnetic valve when equaling the second liquid level;
Further, the pipeline portions above the organic matter layer being placed in negative pole storage tank of described first pipeline adopts telescoping tube;
Further, described telescoping tube is outside equipped with ball float.
A kind of flow battery system, comprises pile, positive pole storage tank, negative pole storage tank and the flow battery electrolyte liquid sealing system described in above-mentioned any one.
Owing to have employed technique scheme, flow battery electrolyte liquid sealing system provided by the invention and flow battery system, by the electrolyte liquid in negative pole storage tank arranges organic matter layer, because liquid state organics molecule has good mobility and air-tightness, ensure that the good air exclusion effect of electrolyte liquid to air, negative pole storage tank and positive pole storage tank is connected by connecting pipeline, control unit according to electrolyte liquid fluid level condition to the control of the on off state of the electromagnetically operated valve be arranged on connecting pipeline, ensure that electrolyte liquid is in safety levels state, and compared with common flow battery system, reduce capacity attenuation speed, there is good safety in operation and stability, first pipeline one end exports with the electrolyte liquid of pile and is connected, the first pipeline other end is positioned at below electrolyte liquid liquid level all the time to be located, electrolyte liquid can be avoided to drive organic molecule enter pile inside and cause carbon felt to lose the phenomenon generation of conduction and catalysis.
Accompanying drawing explanation
Fig. 1 is the structural representation of flow battery system of the present invention;
Fig. 2 is the change curve of the energy density in organic substance sealing experiment 1 with charge and discharge cycles number;
Fig. 3 is the change curve of the efficiency in organic substance sealing experiment 1 with charge and discharge cycles number;
Fig. 4 is the change curve of the energy density in organic substance sealing experiment 2 with charge and discharge cycles number;
Fig. 5 is the change curve of the efficiency in organic substance sealing experiment 2 with charge and discharge cycles number.
In figure: 1, the first pipeline, 2, the outlet of electrolyte liquid, 3, pile, 4, liquid level gauge, 5, organic matter layer, 6, electrolyte liquid, 7, negative pole storage tank, the 8, second pipeline, 9, circulating pump, 10, control unit, 11, positive pole storage tank, 12, electrolyte liquid entrance, 13, connecting pipeline, 14, anode electrolyte, 15, electromagnetically operated valve, 16, telescoping tube, 17, ball float.
Embodiment
A kind of flow battery electrolyte liquid sealing system as shown in Figure 1, comprising: be arranged on the organic matter layer 5 on the electrolyte liquid 6 in negative pole storage tank 7; Connect the electrolyte liquid outlet 2 of pile 3 and the first pipeline 1 of negative pole storage tank 7; Described first pipeline 1 one end exports 2 with the electrolyte liquid of pile 3 and is connected, and the other end is placed in electrolyte liquid 6; Connect the second pipeline 8 of the electrolyte liquid entrance 12 of negative pole storage tank 7 and pile 3; Further, described organic matter layer 5 is be liquid at the working temperature and water-fast organic substance, is selected from one or more in the alkanes of long-chain or ring-type, alcohols, aldehydes, ethers, ketone, carboxylic acids, ester class and above organic derivative; Further, described organic density is less than 1.2g/cm at the working temperature
3; Described working temperature is 10 ~ 45 DEG C; The thickness of described organic matter layer is 2 ~ 100mm; Further, described first pipeline 1 other end is positioned at all the time below electrolyte liquid 6 liquid level and locates; Further, the distance between described first pipeline 1 other end and electrolyte liquid 6 liquid level is less than 20% with the ratio of electrolyte liquid 6 height; In addition, also comprise: be arranged on the connecting pipeline 13 between negative pole storage tank 7 and positive pole storage tank 11; Be arranged on connecting pipeline 13, for opening or close the electromagnetically operated valve 15 of connecting pipeline 13; In addition, also comprise: be arranged in negative pole storage tank 7, for monitoring the liquid level gauge 4 of electrolyte liquid 6 liquid level change; Connected electromagnetic valve 15 and liquid level gauge 4, for opening lower than Controlling solenoid valve 15 when equaling the first liquid level when electrolyte liquid 6 liquid level that liquid level gauge 4 is monitored, the control unit 10 that electromagnetically operated valve 15 cuts out higher than Controlling solenoid valve 15 when equaling the second liquid level when electrolyte liquid 6 liquid level that liquid level gauge 4 is monitored after opening; Further, the pipeline portions above the organic matter layer 5 being placed in negative pole storage tank 7 of described first pipeline 1 adopts telescoping tube 16; Further, described telescoping tube 16 is outside equipped with ball float 17; Further, described telescoping tube 16 adopts PP material, and the remainder of described first pipeline 1 adopts the materials such as UPVC, PPH or PE.
A kind of flow battery system, comprises pile 3, positive pole storage tank 11, negative pole storage tank 7 and the flow battery electrolyte liquid sealing system described in above-mentioned any one; Described flow battery system is preferably all-vanadium redox flow battery system.
Flow battery electrolyte liquid sealing system provided by the invention and flow battery system, by the electrolyte liquid in negative pole storage tank arranges organic matter layer, the thickness of described organic matter layer can value be 2 ~ 100mm, because liquid state organics molecule has good mobility and air-tightness, ensure that the good air exclusion effect of electrolyte liquid to air, negative pole storage tank and positive pole storage tank is connected by connecting pipeline, control unit according to electrolyte liquid fluid level condition to the control of the on off state of the electromagnetically operated valve be arranged on connecting pipeline, ensure that electrolyte liquid is in safety levels state, and compared with common flow battery system, reduce capacity attenuation speed, there is good safety in operation and stability, first pipeline one end exports with the electrolyte liquid of pile and is connected, the first pipeline other end is positioned at below electrolyte liquid liquid level all the time to be located, electrolyte liquid can be avoided to drive organic molecule enter pile inside and cause carbon felt to lose the phenomenon generation of conduction and catalysis, further, pipeline portions above the organic matter layer being placed in negative pole storage tank of the first pipeline adopts telescoping tube, described telescoping tube is outside equipped with ball float, then the decrement of this telescoping tube can change the buoyancy size of ball float according to electrolyte liquid and organic matter layer, when the liquid level of organic matter layer reaches preset maximum value, the decrement of described telescoping tube is maximum, when the liquid level of organic matter layer reaches predetermined minimum, the decrement of described telescoping tube is zero, ensure that the position of the first tube outlet in electrolyte liquid can change along with the change correspondence of electrolyte liquid liquid level, wherein preset maximum value can value when electrolyte liquid liquid level apart from the second line entry 200mm time organic matter layer liquid level value, predetermined minimum can value when electrolyte liquid build-up of fluid is to organic matter layer liquid level value during initial liquid height, the structure of described telescoping tube can comprise outer tube and be placed in the interior pipe in outer tube, described interior pipe can slide along outer tube wall, concrete described interior pipe moves up and down by 3 depression slideways that outer tube wall is arranged, the center line of pipeline is not departed from during to ensure that interior pipe slides, interior Guan Qi arranges ball float apart from 300mm place, interior pipe bottom, Guan Shangyi in the buoyancy promotion telescoping tube of liquid level to ball float has.
Organic matter layer of the present invention can be selected from the alkanes of long-chain or ring-type, alcohols, aldehydes, ethers, ketone, carboxylic acids, ester class and above organic derivative one or more; Wherein ester class can adopt the oil layer such as vegetable fat or mineral grease, and above organic substance all has and is insoluble to electrolyte liquid, and non-conductive and density is much smaller than the feature of electrolyte, and the density of such as grease is generally less than 1.0g/cm
3, the density of electrolyte liquid is 1.3-1.4g/cm
3, can ensure that oil layer floats on electrolyte liquid surface with certain thickness tiling, make it as the isolated material of flow battery system electrolyte liquid and air; The electrolyte liquid outlet of the present invention first pipeline and the electrolyte liquid entrance of the second pipeline are all in below organic matter layer, can better prevent from contacting from pile electrolyte liquid out with organic substance, and electrolyte liquid carries near the electrolyte liquid entrance of organic molecule to the second pipeline, avoid organic molecule to be inhaled into the character changing carbon felt electrode in the carbon felt of flow battery, and then the phenomenon that whole system impacts is occurred.
The present invention further study the dynamically long-term discharge and recharge sealing operation test of 2kW level flow battery system on the basis that the static storage of prior art is tested, examine under the condition adopting organic matter layer sealing, battery system long-term circulation time discharge and recharge operation stability and energy attenuation situation under different temperatures, different operational factor and different operation reserve, while result of the test shows that its capacity attenuation speed reduces greatly compared with conventional seals mode, system has good safety in operation and stability.
Below in conjunction with chart and experimental data, the specific embodiment to organic matter layer of the present invention is described;
Embodiment 1:
Table 1 is the test parameters table of organic substance leakage test 1, Fig. 2 is the change curve of the energy density in organic substance sealing experiment 1 with charge and discharge cycles number, Fig. 3 is the change curve of the efficiency in organic substance sealing experiment 1 with charge and discharge cycles number, as table 1, shown in Fig. 2 and Fig. 3, organic matter layer is adopted to be sealed into prerequisite, described organic substance adopts ester class, be specially vegetable oil (main component is triglyceride), the outlet of electrolyte liquid and the negative pole storage tank of pile is connected by the first pipeline, ensure that the electrolyte liquid outlet of the first pipeline is positioned at below electrolyte liquid liquid level all the time, sealing system long-time running can be realized and flow battery is not impacted, the flow battery system with negative pole storage tank seal system shows the fade performance of good anti-dioxygen oxidation, negative pole storage tank and positive pole storage tank is connected by connecting pipeline, after anode electrolyte can flow into the mutual mixed operation of experience in negative pole storage tank by connecting pipeline from positive pole storage tank, the capacity of system is recovered, overall valence state through sampling detection system still tends to balance, namely the capacity attenuation amount that side reaction causes only is equivalent to 30% of normal operation mode.
The test parameters table of table 1. organic substance leakage test 1.
Embodiment 2
Table 2 is test parameters tables of organic substance sealing experiment 2, Fig. 4 is the change curve of the energy density in organic substance sealing experiment 2 with charge and discharge cycles number, Fig. 5 is the change curve of the efficiency in organic substance sealing experiment 2 with charge and discharge cycles number, table 3 is decay and the efficiency data table of organic substance sealing experiment 2, as table 2, Fig. 4, shown in Fig. 5 and table 3, organic matter layer is adopted to be sealed into prerequisite, described organic substance adopts ester class, be specially mineral oil, organic matter layer is added and has installed in the negative pole storage tank of electrolyte liquid, the outlet of electrolyte liquid and the negative pole storage tank of pile is connected by the first pipeline, the electrolyte liquid entrance of negative pole storage tank and pile is connected by the second pipeline, and connect negative pole storage tank and positive pole storage tank by connecting pipeline, liquid level gauge is provided with in negative pole storage tank, for monitoring the change of electrolyte liquid liquid level, the liquid level change of electrolyte liquid can be known by the liquid level change of monitoring organic matter layer during practical application, control unit connected electromagnetic valve and liquid level gauge, when the electrolyte liquid liquid level that liquid level gauge is monitored is opened lower than Controlling solenoid valve when equaling the first liquid level, when the electrolyte liquid liquid level that liquid level gauge is monitored controls closed electromagnetic valve higher than when equaling the second liquid level after electromagnetically operated valve unlatching, the distance supposing initial electrolyte liquid level to the second line entry is A, then when electrolyte liquid level drops to A/2, control unit Controlling solenoid valve is opened, anode electrolyte in positive pole storage tank flows in negative pole storage tank by connecting pipeline automatically, safe altitude is in keep the liquid level of electrolyte liquid, when electrolyte liquid returns to initial liquid height A, control unit Controlling solenoid valve is closed, wherein A is the second described liquid level, A/2 is the first described liquid level, experimentally result can find out the connecting pipeline by connecting positive pole storage tank and negative pole storage tank, and control unit according to electrolyte liquid fluid level condition to the control of the on off state of the electromagnetically operated valve be arranged on connecting pipeline, ensure that electrolyte liquid is in safety levels state, at interval of several charge and discharge cycles, anode electrolyte in positive pole storage tank proceeds in negative pole storage tank by system automatically, in conjunction with the precondition sealing electrolyte liquid with organic matter layer, compared with common flow battery system, there is good anti-decay property and safety in operation.
The test parameters table of table 2. organic substance sealing experiment 2.
The decay of table 3. organic substance sealing experiment 2 and efficiency data table.
In table 3, CE is coulombic efficiency, and represent the ratio of discharge capacity and charging capacity Ah, in this leakage test, after can representing long term storage after charging, whether discharge capacity can keep; EE is energy efficiency, represents the ratio of discharge energy and rechargeable energy Wh, the same CE of measuring mechanism in this experiment; VE is voltage efficiency, represents electric discharge average voltage and the ratio of charging average voltage, can find out and adopt electrolyte liquid sealing system to flow battery system efficiency without impact.
Embodiment 3
Table 4 is test parameters tables of organic substance sealing experiment 3, table 5 is result of the test tables of data of organic substance sealing experiment 3, situation is kept for investigating the discharge capacity of flow battery system after full charge during long term storage with negative pole storage tank seal system, as table 4, shown in table 5, organic substance adopts the mixture of ester class and alkanes, be specially the mixture of soybean oil and dodecane, test adopts 2kW flow battery system, after system charging, now in electrolyte liquid, divalent vanadium V2+ reaches finite concentration, system discharge program is shelved, circulating pump stops, circulating pump and discharge procedures is again started after leaving standstill a period of time, investigate the situation of change of system parameters.
The test parameters table of table 4. organic substance sealing experiment 3.
| Project | Numerical value |
| Solution temperature | Room temperature (28-35 DEG C) |
| Both positive and negative polarity volume | The each 40L in the two poles of the earth |
| The power of battery | 2kw |
| Organic substance classification | Soybean oil+dodecane |
| Organic matter layer thickness | 15mm |
The result of the test tables of data of table 5. organic substance sealing experiment 3.
In table 5, CE is coulombic efficiency, and represent the ratio of discharge capacity and charging capacity Ah, in this leakage test, after can representing long term storage after charging, whether discharge capacity can keep; EE is energy efficiency, represents the ratio of discharge energy and rechargeable energy Wh, the same CE of measuring mechanism in this experiment.
Embodiment 4
Adopt the circuit design in embodiment 1, table 6 is test parameters tables of organic substance sealing experiment 4, and table 7 is result of the test tables of data of organic substance sealing experiment 4, as shown in table 6, and organic substance adopts alcohols, and be specially cyclopentanol, result of the test is as shown in table 7.
The test parameters table of table 6. organic substance sealing experiment 4.
| Project | Numerical value |
| Solution temperature | Room temperature (35-40 DEG C) |
| Both positive and negative polarity volume | The each 40L in the two poles of the earth |
| The power of battery | 2kw |
| Organic substance classification | Cyclopentanol |
| Organic matter layer thickness | 10mm |
The result of the test tables of data of table 7. organic substance sealing experiment 4.
Embodiment 5
Table 8 is test parameters tables of organic substance sealing experiment 5, and table 9 is decay and the efficiency data table of organic substance sealing experiment 5, and as shown in table 8, table 9, organic substance adopts alkanes, is specially normal octane.
The test parameters table of table 8. organic substance sealing experiment 5.
The decay of table 9. organic substance sealing experiment 5 and efficiency data table.
Embodiment 6
Table 10 is test parameters tables of organic substance sealing experiment 6, and table 11 is decay and the efficiency data table of organic substance sealing experiment 6, and as shown in table 10, table 11, organic substance adopts ethers, is specially positive propyl ether.
The test parameters table of table 10. organic substance sealing experiment 6.
The decay of table 11. organic substance sealing experiment 6 and efficiency data table,
The above; be only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. a flow battery electrolyte liquid sealing system, is characterized in that comprising:
Be arranged on the organic matter layer (5) on the electrolyte liquid (6) in negative pole storage tank (7);
Connect electrolyte liquid outlet (2) of pile (3) and first pipeline (1) of negative pole storage tank (7); Described first pipeline (1) one end exports (2) with the electrolyte liquid of pile (3) and is connected, and the other end is placed in negative pole storage tank (7);
Connect second pipeline (8) of the electrolyte liquid entrance (12) of negative pole storage tank (7) and pile (3).
2. a kind of flow battery electrolyte liquid sealing system according to claim 1, it is characterized in that described organic matter layer (5) is for being liquid at the working temperature and water-fast organic substance, is selected from one or more in the alkanes of long-chain or ring-type, alcohols, aldehydes, ethers, ketone, carboxylic acids, ester class and above organic derivative.
3. flow battery electrolyte liquid sealing system according to claim 2, is characterized in that described organic density is less than 1.2g/cm at the working temperature
3; The thickness of described organic matter layer is 2 ~ 100mm.
4. a kind of flow battery electrolyte liquid sealing system according to claim 1, is characterized in that described first pipeline (1) other end is positioned at below electrolyte liquid (6) liquid level all the time and locates.
5. a kind of flow battery electrolyte liquid sealing system according to claim 4, is characterized in that the distance between described first pipeline (1) other end and electrolyte liquid (6) liquid level is less than 20% with the ratio of electrolyte liquid (6) height.
6. a kind of flow battery electrolyte liquid sealing system according to claim 1, characterized by further comprising:
Be arranged on the connecting pipeline (13) between negative pole storage tank (7) and positive pole storage tank (11);
Be arranged on connecting pipeline (13), for opening or close the electromagnetically operated valve (15) of connecting pipeline (13).
7. a kind of flow battery electrolyte liquid sealing system according to claim 6, characterized by further comprising:
Be arranged in negative pole storage tank (7), for monitoring the liquid level gauge (4) of electrolyte liquid (6) liquid level change;
Connected electromagnetic valve (15) and liquid level gauge (4), for opening lower than Controlling solenoid valve (15) when equaling the first liquid level when electrolyte liquid (6) liquid level that liquid level gauge (4) is monitored, the control unit (10) that electromagnetically operated valve (15) cuts out higher than Controlling solenoid valve (15) when equaling the second liquid level when electrolyte liquid (6) liquid level that liquid level gauge (4) is monitored after opening.
8. a kind of flow battery electrolyte liquid sealing system according to claim 1, the pipeline portions above the organic matter layer (5) being placed in negative pole storage tank (7) that it is characterized in that described first pipeline (1) adopts telescoping tube (16).
9. a kind of flow battery electrolyte liquid sealing system according to claim 8, is characterized in that described telescoping tube (16) is outside equipped with ball float (17).
10. a flow battery system, is characterized in that comprising pile (3), positive pole storage tank (11), negative pole storage tank (7) and the flow battery electrolyte liquid sealing system described in any one of claim 1 to 9.
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| CN105789665A (en) * | 2016-03-14 | 2016-07-20 | 上海电气集团股份有限公司 | Liquid level balancing system |
| 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 |
| CN106654314A (en) * | 2016-11-04 | 2017-05-10 | 大连融科储能技术发展有限公司 | Electrolyte storage tank and flow cell |
| CN107195932A (en) * | 2016-03-14 | 2017-09-22 | 大连融科储能技术发展有限公司 | The stable regulation and control method of flow battery capacity, system and flow battery |
| CN107210480A (en) * | 2015-12-08 | 2017-09-26 | 香港中文大学 | High-energy-density and inexpensive liquid galvanochemistry device |
| CN108565484A (en) * | 2018-03-20 | 2018-09-21 | 中国东方电气集团有限公司 | Electrolyte storage tank and battery with it |
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| CN114122536A (en) * | 2021-10-27 | 2022-03-01 | 北京和瑞储能科技有限公司 | Battery pack performance testing device |
| 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 |
| CN116960408A (en) * | 2023-09-21 | 2023-10-27 | 山西国润储能科技有限公司 | Electrolyte leveling and mixing system and method for all-vanadium redox flow battery |
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