CN114024002A - Automatic liquid level balancing device and flow battery system - Google Patents
Automatic liquid level balancing device and flow battery system Download PDFInfo
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- CN114024002A CN114024002A CN202111220141.0A CN202111220141A CN114024002A CN 114024002 A CN114024002 A CN 114024002A CN 202111220141 A CN202111220141 A CN 202111220141A CN 114024002 A CN114024002 A CN 114024002A
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- 239000007788 liquid Substances 0.000 title claims abstract description 146
- 239000003792 electrolyte Substances 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005520 electrodynamics Effects 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 229910017060 Fe Cr Inorganic materials 0.000 description 6
- 229910002544 Fe-Cr Inorganic materials 0.000 description 6
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 6
- 229910001447 ferric ion Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 229910000604 Ferrochrome Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- -1 Cr3+ ion Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
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- 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
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- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses an automatic liquid level balancing device and a flow battery system, and the technical scheme is characterized in that the liquid level balancing device comprises an anode storage tank and a cathode storage tank, the anode storage tank is used for storing anode electrolyte, the cathode storage tank is used for storing cathode electrolyte, a high-level balancing protection pipe and a low-level automatic balancing pipe are arranged between the anode storage tank and the cathode storage tank, an electric balancing valve is arranged on the low-level automatic balancing pipe, high-level interlocking control equipment is arranged between the high-level balancing protection pipe and the low-level automatic balancing pipe, and the high-level interlocking control equipment controls the electric balancing valve to be opened and closed. The automatic liquid level balancing device can realize liquid level balance when the liquid level deviation exceeds a set value.
Description
Technical Field
The invention belongs to the technical field of flow batteries, and particularly relates to an automatic liquid level balancing device and a flow battery system.
Background
As a large-sized power storage facility, the energy storage scale of the flow battery is between that of a power grid and that of various portable batteries, and the flow battery can just fill the blank between the large-sized power grid and the small-sized batteries, so that the flow battery plays a unique role in many fields. Liquid level shift occurs during charging and discharging of the flow battery system. Specifically, the flow battery has a capacity fading problem during operation, that is, the reaction degrees of the positive electrode and the negative electrode are different during the charging process of the flow battery, so that the ion reaction of one of the positive electrode and the negative electrode is finished first during discharging, and the remaining part of unreacted ions in the other electrode are remained. In order to restore the capacity of the flow battery and convert the unreacted ions that are continuously accumulated into an initial state, the flow battery in the related art is equipped with a special balancing system.
In the prior art, an independent pump is usually used for liquid level balance, and the defects are that the energy consumption is high, the system is complex, the instability of the system is easily caused, and the program or manual control is needed. Therefore, it is a technical problem to be solved by the prior art to develop an automatic liquid level balancing device.
Disclosure of Invention
The invention aims to provide an automatic liquid level balancing device and a flow battery system, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an automatic liquid level balancing device comprises an anode storage tank and a cathode storage tank, wherein the anode storage tank is used for storing anode electrolyte, the cathode storage tank is used for storing cathode electrolyte,
a high-level balance protection pipe and a low-level automatic balance pipe are arranged between the anode storage tank and the cathode storage tank, an electric balance valve is arranged on the low-level automatic balance pipe, and high-level interlocking control equipment is arranged between the high-level balance protection pipe and the low-level automatic balance pipe; and the high liquid level interlocking control equipment controls the opening and closing of the electric balance valve.
Preferably, the high-level balance protection pipe and the low-level automatic balance pipe are communicated with each other.
Preferably, the high level interlock control device comprises a level sensor and a controller, wherein,
the liquid level sensor is divided into a first liquid level sensor and a second liquid level sensor, the first liquid level sensor is installed on the anode storage tank, and the second liquid level sensor is installed on the cathode storage tank;
the controller is connected with the first liquid level sensor and the second liquid level sensor respectively, the other end of the controller is connected with the control motor, and the control motor is connected with the electric balance valve and controls the opening and closing of the electric balance valve.
Preferably, the top of the positive storage tank and the top of the negative storage tank are sealed, and a gas phase pipe for balancing gas phase pressure is connected to the top ends of the positive storage tank and the negative storage tank.
Preferably, the liquid level sensor and the second liquid level sensor are arranged in an interlocking manner with the electrodynamic balance valve.
Preferably, the high-level balance protection pipe is arranged at a position higher than the preset highest point of the positive storage tank and the negative storage tank, and the low-level balance protection pipe is arranged at a position lower than the average lowest point of the positive storage tank and the negative storage tank.
Preferably, the contact points of the first liquid level sensor are arranged at the upper end and the lower end of the average liquid level of the anode storage tank, and the contact points of the second liquid level sensor are arranged at the upper end and the lower end of the average liquid level of the cathode storage tank.
Preferably, high liquid level interlocking control equipment still includes liquid level measurement device and liquid level display controlling means, in positive storage tank and negative pole storage tank were put into respectively to liquid level measurement device's one end, other end electric connection to liquid level display controlling means, liquid level display controlling means is connected with instrument control valve device respectively.
Preferably, the instrument control valve device adopts an electric switch butterfly valve or an electric ball valve.
The invention also provides a flow battery, which comprises a positive storage tank and a negative storage tank, and also comprises an automatic liquid level balancing device,
a high-level balance protection tube and a low-level automatic balance tube are arranged between the anode storage tank and the cathode storage tank of the automatic liquid level balancing device, and high-level liquid level interlocking control equipment is arranged between the high-level balance protection tube and the low-level automatic balance tube.
The invention has the technical effects and advantages that:
the invention relates to liquid level deviation which can occur in the charging and discharging processes of a flow battery system.
The invention has the functions of active automatic liquid level balance and passive protection, can realize balance, avoid unnecessary energy loss and provide safety protection when the active protection fails.
The invention adopts simple pipelines and valves as main materials of the balance system, has convenient material acquisition and low cost. The active balance is adopted, no power is needed for liquid level balance except for opening the valve, and the liquid level balance valve has safety and reliability. And passive protection balance is adopted, and when the active protection fails, the passive balance can protect the system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 is a schematic view of a liquid level balancing apparatus of the present invention.
In the figure: 1-a positive storage tank; 2-a negative storage tank; 3-high balance protection tube; 4-a low level automatic balancing pipe; 5-high liquid level interlocking control equipment; 6-an electrodynamic balance valve; 7-a first level sensor; 8-a second liquid level sensor; 9-gas phase tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an automatic liquid level balancing device as shown in figure 1, which comprises a positive storage tank 1 and a negative storage tank 2, wherein the positive storage tank 1 is used for storing positive electrolyte, and the negative storage tank 2 is used for storing negative electrolyte. Anodal storage tank 1 with be provided with high-order balanced protection tube 3 and low level automatic balance pipe 4 between the negative pole storage tank 2, be provided with electrodynamic balance valve 6 on the low level automatic balance pipe 4, open electrodynamic balance valve 6, electrolyte flows from high liquid level one end to the one end of low liquid level between two storage tanks, closes electrodynamic balance valve 6, and electrolyte does not flow between two storage tanks. A high liquid level interlocking control device 5 is arranged between the high-level balance protection tube 3 and the low-level automatic balance tube 4; the high liquid level interlock control device 5 controls the opening and closing of the electrodynamic balance valve 6.
Specifically, high liquid level interlocking control equipment 5 includes level sensor and controller, wherein, level sensor divide into first level sensor 7 and second level sensor 8, first level sensor 7 and second level sensor 8 are installed respectively on positive, negative pole electrolyte storage tank. Specifically, the first liquid level sensor 7 is mounted on the positive electrode tank 1. Wherein, the contact points of the first liquid level sensor 7 are arranged at the upper and lower liquid level ends of the anode storage tank 1; the second liquid level sensor 8 is mounted on the negative reservoir 2. Wherein, the second liquid level sensor 8 is arranged at the upper and lower liquid level ends of the cathode storage tank 2. The controller is connected with first level sensor 7 and second level sensor 8 respectively, the controller still is connected with control motor, control motor connects electrodynamic balance valve 6 to the switching of control electrodynamic balance valve 6.
Specifically, the top of electrolyte storage tank seals the setting, is connected with the gas phase pipe 9 of balanced gaseous phase pressure on the top of two electrolyte storage tanks, and gas phase pipe 9 is used for guaranteeing the atmospheric pressure UNICOM at storage tank both ends. The high-level balance protection pipe 3 is arranged at a position higher than the highest point of the liquid levels of the two electrolyte storage tanks and used for preventing the electrolyte from overflowing from the storage tanks. The low-level balance protection pipe is arranged at a position lower than the average lowest point of the liquid levels of the two storage tanks, so that the protection effect of the lowest electrolyte can be achieved.
This embodiment still includes liquid level measurement device and liquid level display controlling means, and in positive storage tank 1 and negative pole storage tank 2 were put into to liquid level measurement device's one end, other end electric connection to liquid level display controlling means, liquid level display controlling means still respectively with the instrument control valve device be connected. Wherein the instrumentation valve comprises a first instrumentation valve and a second instrumentation valve.
The liquid level display control device sets the height value of the liquid level to be controlled, sets the high limit and the low limit respectively, in the liquid inlet process of the tank, the liquid level measuring device measures the liquid level in the current storage tank in real time and transmits the data to the liquid level display control device, the liquid level display control device compares the received real-time liquid level data with the initially set liquid level height value (the high limit and the low limit), when the detected liquid level value reaches the set value (the high limit value), the first instrument control valve device is automatically opened, and liquid is discharged outwards. When the detected liquid level value is lower than a set value (low limit value), the second instrument control valve device is automatically opened to perform internal circulation of liquid discharge, the first instrument control valve device and the second instrument control valve device are automatically closed after one minute, and the liquid in the pipeline is discharged under the action of opening the second instrument control valve device because the liquid discharge valve is closed at time intervals and residues exist in the pipeline, so that sufficient safety is provided for subsequent pipeline maintenance work which possibly occurs, and the valve closing time can be manually set according to actual conditions on site.
As an implementation mode of the embodiment, the instrument control valve device can adopt an electric switch butterfly valve or an electric ball valve.
As an embodiment of this embodiment, the level measuring device may use a radar level gauge or an ultrasonic level gauge.
Specifically, the liquid level balance comprises that when the liquid level sensor confirms high-level alarm, the low-level liquid level electric balance valve 6 is opened, the high liquid level in the storage tank flows to the low liquid level, and the valve is automatically closed after the liquid level is restored; when the liquid level sensor fails or the electric balance valve 6 fails, the liquid level can pass through the overflow protection system of the upper high-level liquid level balance pipe; and balance is realized.
Specifically, the high level interlock control device 5 controls the balancing of the liquid levels including:
when the high liquid level alarms, the controller sends a starting signal to the control motor, and the control motor receives the signal and drives the electric balance valve 6 to open; when the liquid level is reduced to the preset liquid level, the controller sends a shutdown signal to the control motor, the control motor is closed, and the balance valve is closed accordingly.
In summary, the high liquid level interlocking control device 5 controls the natural balance of the liquid level by adopting a liquid level sensor and an electric valve interlocking mode.
The positive electrode circulating pump is used for circularly conveying positive electrode electrolyte between the positive electrode electrolyte storage tank of the balancing device and the positive electrode; the balance device negative electrode electrolyte storage tank is connected with the negative electrode through a negative electrode circulating pipeline, and the negative electrode circulating pump is used for circularly conveying negative electrode electrolyte between the balance device negative electrode electrolyte storage tank and the negative electrode;
the balancing device positive electrolyte storage tank is used for storing positive electrolyte containing active cations; and the balance device negative electrolyte storage tank is simultaneously used as the positive storage tank 1 of the working flow battery and used for storing the positive electrolyte of the working flow battery.
The invention also provides a flow battery, which comprises a positive storage tank 1 and a negative storage tank 2, wherein the positive storage tank 1 is used for storing positive electrolyte, the negative storage tank 2 is used for storing negative electrolyte, and the positive storage tank 1 and the negative storage tank 2 are communicated with each other; wherein,
the redox flow battery further comprises an automatic liquid level balancing device, wherein a high-level balance protection tube 3 and a low-level automatic balance tube 4 are arranged between the anode storage tank 1 and the cathode storage tank 2 of the automatic liquid level balancing device, and a high-level interlocking control device 5 is arranged between the high-level balance protection tube 3 and the low-level automatic balance tube 4.
It is worth noting that the term "flow battery" in this specification does not specifically refer to which type of flow battery is suitable for use in Fe — Cr flow batteries.
Specifically, the ferrochrome flow battery includes positive storage tank 1, positive storage tank 1 is used for storing positive electrolyte, the ferrochrome flow battery balancing unit still includes: the balance storage tank is used for storing a hydrochloric acid solution; the rebalance battery is used for carrying out an electrolytic reaction on chloride ions in the hydrochloric acid solution and ferric ions of the anode electrolyte in the anode storage tank 1 so as to reduce the ferric ions into ferrous ions; and the direct current power supply is arranged on the rebalance battery and is used for electrifying the rebalance battery so as to realize the electrolytic reaction of the ferric ions and the chloride ions.
By applying the automatic liquid level balancing device of the embodiment, the positive liquid storage tank and the negative liquid storage tank of the flow battery are communicated through the communication pipeline, the water exchange part is arranged in the communication pipeline and is used for communicating water in the positive liquid storage tank and the negative liquid storage tank and isolating electrolyte ions in the positive liquid storage tank and the negative liquid storage tank. Therefore, the gradual imbalance of the volumes of the electrolytes of the positive electrode and the negative electrode caused by water migration in the long-term use process of the flow battery can be prevented, and the problem of battery performance attenuation caused by the imbalance of the electrolytes in the long-term operation process of the all-vanadium redox flow battery in the prior art is solved.
The invention principle is as follows: when the liquid level sensor confirms that the high level alarms, the low level liquid level balance valve is opened, the balance is carried out by the communicating device principle, and the valve is automatically closed after the liquid level is restored; when the liquid level sensor fails or the electric balance valve 6 fails, the liquid level balance device can pass through the overflow protection system of the upper high-level liquid level balance pipe; if the liquid level is balanced manually, the balance valve at the lower part is opened manually and is closed after the liquid level is balanced. The upper gas phase pipe 9 can equalize the gas phase pressure at the time of liquid level equilibrium. And the liquid level is naturally balanced by adopting a mode of interlocking the liquid level meter and the electric valve. The working principle of the Fe-Cr flow battery is expressed by an ion equation as follows:
and (3) positive electrode: fe2+-e-→Fe3+ (charging)
Negative electrode: cr (chromium) component3++e-→Cr2+ (charging).
In the Fe-Cr flow battery system, the operating principle of the rebalance system of the Fe-Cr flow battery is expressed by an ion equation as follows:
positive electrode Fe2+-e-→Fe3+ (charging)
Negative electrode Fe3++e-→Fe2+ (charging).
Therefore, by applying constant current to the balance system of the Fe-Cr flow battery and controlling the power supply voltage, the generation of other reactions can be inhibited; during the reaction process, the negative pole of the system can gradually reduce the irreversible Fe accumulated in the positive storage tank 1 of the Fe-Cr flow battery3+ ion to recover positive electrode Fe of Fe-Cr flow battery2+ ion concentration and cathode Cr3+ ion concentration balancing purposes.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides an automatic liquid level balancing unit, liquid level balancing unit includes anodal storage tank (1) and negative pole storage tank (2), anodal storage tank (1) is used for saving anodal electrolyte, negative pole storage tank (2) are used for saving negative pole electrolyte, its characterized in that:
a high-level balance protection tube (3) and a low-level automatic balance tube (4) are arranged between the anode storage tank (1) and the cathode storage tank (2), an electric balance valve (6) is arranged on the low-level automatic balance tube (4), and a high-level interlocking control device (5) is arranged between the high-level balance protection tube (3) and the low-level automatic balance tube (4); and the high liquid level interlocking control equipment (5) controls the opening and closing of the electric balance valve (6).
2. An automatic liquid level balancing device according to claim 1, characterized in that: the high-position balance protection tube (3) and the low-position automatic balance tube (4) are communicated with each other.
3. An automatic liquid level balancing device according to claim 2, characterized in that: the high liquid level interlocking control device (5) comprises a liquid level sensor and a controller, wherein,
the liquid level sensor is divided into a first liquid level sensor (7) and a second liquid level sensor (8), the first liquid level sensor (7) is installed on the anode storage tank (1), and the second liquid level sensor (8) is installed on the cathode storage tank (2);
the controller is connected with a first liquid level sensor (7) and a second liquid level sensor (8) respectively, the other end of the controller is connected with a control motor, and the control motor is connected with the electric balance valve (6) and controls the opening and closing of the electric balance valve (6).
4. An automatic liquid level balancing device according to claim 3, characterized in that: the top of the positive storage tank (1) and the top of the negative storage tank (2) are arranged in a closed mode, and the top ends of the positive storage tank (1) and the negative storage tank (2) are connected with a gas phase pipe (9) for balancing gas phase pressure.
5. An automatic liquid level balancing device according to claim 3, characterized in that: the first liquid level sensor (7) and the second liquid level sensor (8) are arranged in an interlocking manner with the electric balance valve (6).
6. An automatic liquid level balancing device according to claim 1, characterized in that: the high-level balance protection tube (3) is arranged at a position higher than the preset highest point of the positive storage tank (1) and the negative storage tank (2), and the low-level balance protection tube is arranged at a position lower than the average lowest point of the positive storage tank (1) and the negative storage tank (2).
7. An automatic liquid level balancing device according to claim 3, characterized in that: the contact points of the first liquid level sensor (7) are arranged at the upper end and the lower end of the average liquid level of the anode storage tank (1), and the contact points of the second liquid level sensor (8) are arranged at the upper end and the lower end of the average liquid level of the cathode storage tank (2).
8. An automatic liquid level balancing device according to any one of claims 1 or 3, characterized in that: high liquid level interlocking control equipment (5) still include liquid level measurement device and liquid level display controlling means, in positive storage tank (1) and negative pole storage tank (2) were put into respectively to liquid level measurement device's one end, other end electric connection to liquid level display controlling means, liquid level display controlling means is connected with the instrument control valve device.
9. An automatic liquid level balancing device according to claim 8, characterized in that: the instrument control valve device adopts an electric switch butterfly valve or an electric ball valve.
10. A flow battery comprising a positive storage tank (1) and a negative storage tank (2), characterized in that the flow battery comprises:
the automatic liquid level balancing device is as claimed in any one of claims 1 to 9, wherein a high-level balance protection tube (3) and a low-level balance tube (4) are arranged between the anode storage tank (1) and the cathode storage tank (2), and a high-level interlocking control device (5) is arranged between the high-level balance protection tube (3) and the low-level balance tube (4).
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| CN202111220141.0A CN114024002A (en) | 2021-10-20 | 2021-10-20 | Automatic liquid level balancing device and flow battery system |
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