CN116598539B - Liquid flow battery liquid tank internal arrangement structure - Google Patents
Liquid flow battery liquid tank internal arrangement structure Download PDFInfo
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- CN116598539B CN116598539B CN202310881958.5A CN202310881958A CN116598539B CN 116598539 B CN116598539 B CN 116598539B CN 202310881958 A CN202310881958 A CN 202310881958A CN 116598539 B CN116598539 B CN 116598539B
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- 239000007788 liquid Substances 0.000 title claims abstract description 819
- 239000003792 electrolyte Substances 0.000 claims abstract description 203
- 230000000903 blocking effect Effects 0.000 claims abstract description 35
- 239000006185 dispersion Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 6
- 238000003487 electrochemical reaction Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical group [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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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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- 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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Abstract
The invention discloses an arrangement structure in a liquid tank of a flow battery, which belongs to the field of flow batteries and is applied to a flow battery system, and particularly, a liquid return tank adopts the same arrangement structure in the liquid return tank and comprises a liquid collecting and outputting device in the liquid return tank, a liquid entering and dispersing device in the liquid return tank and a liquid flow blocking device; the liquid outlet tank adopts the same liquid outlet tank internal arrangement structure and comprises a liquid collecting and outputting device in the liquid outlet tank, a liquid inlet dispersing device in the liquid outlet tank and a liquid flow blocking device. The invention can avoid the electrolyte which is participated in the electrochemical reaction from being quickly fused with the electrolyte which is participated in the electrochemical reaction after returning to the tank; in the process that the whole electrolyte enters the galvanic pile for one time, the activity of the electrolyte is ensured to be consistent, the pump is maximally maintained to run under the working condition of unification and lower frequency, the flow of the electrolyte in the tank is inhibited, the liquid level fluctuation during the liquid inlet and outlet of the tank body can be reduced, the liquid level change is stable, and the monitoring is convenient.
Description
Technical Field
The invention belongs to the field of flow batteries, and particularly relates to an arrangement structure in a liquid tank of a flow battery.
Background
With the continuous growth of world economy, the demand of people for energy is increasing, and the shortage of energy is becoming more serious. The large consumption of traditional fossil energy causes an increasing environmental problem. Therefore, renewable energy sources are widely applied, but renewable energy sources such as wind energy, solar energy and the like have the characteristics of instability and discontinuity in power generation, and further development of the renewable energy sources is restricted. Therefore, there is a need for large scale energy storage technologies, particularly long term energy storage technologies, to improve the power quality and reliability of renewable energy power generation.
The flow battery has the advantages of high safety, long cycle life, recyclable electrolyte, high life cycle cost performance, environmental friendliness and the like, is considered as one of the first choice technologies of large-scale energy storage technologies, and has wide application prospect.
The technology of the optimal matching new generation power grid is a liquid flow energy storage battery technology in electrochemical energy storage, the energy storage density reaches 10-30 Wh/kg, the efficiency is 60% -85%, and the power and the capacity can be separately and independently designed, so that the charging and discharging reaction is rapid, and the application range is wide; the method can be applied to peak clipping and valley filling, can also be used for standby power supply or emergency power supply, and can also be applied to improving the power quality, regulating voltage and frequency and the like. The electrolyte is used as a key composition of the iron-chromium flow battery, and the efficiency and stability of the battery are determined to a great extent. Electrolyte is stored in the flow battery fluid reservoir, and current flow battery fluid reservoir adopts traditional upright jar, jar or ton bucket's style generally, and the following defect of ubiquitous:
1. the existing liquid tanks mostly adopt a liquid inlet and outlet mode of discharging from bottom to top, after the whole system of the flow battery starts to run, electrolyte is pumped out from a liquid outlet from the lower part in the tank to enter a liquid outlet pipeline for pushing to a pile, after electrochemical reaction is carried out in the pile, the electrolyte enters a liquid inlet at the upper part of the tank body from a liquid return pipeline, a large amount of used low-activity electrolyte which is poured in due to gravitational potential energy and the like can be directly crashed into the electrolyte which does not participate in the electrochemical reaction, the electrolyte flows in the tank in a turbulent mode, the fusion of two electrolytes can be accelerated, the activity of the whole electrolyte is reduced rapidly, and the concentration polarization reaction of the battery is improved.
2. The prior liquid tanks have the problem that the activity of the whole electrolyte is rapidly reduced due to the reasons, so that the power of a pump is generally increased synchronously to enable more electrolyte to rapidly flow into a pile to participate in electrochemical reaction in order to ensure that the charge/discharge efficiency of the battery is consistent, but the overall performance of a battery system is reduced due to the increase of non-battery energy consumption.
3. The existing liquid tank is water column-shaped and a large amount of liquid flows into the liquid return, so that the liquid level is agitated, the liquid level change is strong, the liquid level measurement is seriously influenced, and the difficulty of controlling the liquid level balance in the tank is increased.
Therefore, how to solve the above-mentioned drawbacks is a urgent problem in the field of flow batteries.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an arrangement structure in a liquid flow battery liquid tank. The technical problems to be solved by the invention are realized by the following technical scheme:
an in-tank arrangement for a flow battery for use in a flow battery system, the flow battery system comprising: the device comprises a positive electrode tank group consisting of a positive electrode electrolyte return tank and a positive electrode electrolyte discharge tank, a negative electrode tank group consisting of a negative electrode electrolyte return tank and a negative electrode electrolyte discharge tank, and a galvanic pile; the liquid outlet tanks are connected with the galvanic pile, the galvanic pile and the liquid return tank, and the liquid return tank and the liquid outlet tank in the same tank group; in the arrangement structure in the liquid flow battery liquid tank:
the liquid return tank adopts the same liquid return tank internal arrangement structure, and comprises: the liquid in the liquid return tank is collected and output, enters the dispersing device and flows through the blocking device; the liquid collecting and outputting device in the liquid returning tank is used for uniformly collecting electrolyte at the bottom layer in the liquid returning tank and outputting the electrolyte to a pipeline of the liquid returning tank connected with the liquid outlet tank in the same tank group; the liquid in the liquid return tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid return tank; the liquid flow blocking device is used for carrying out turbulence on electrolyte in the tank and blocking liquid at the upper end and the lower end in the tank from flowing in a turbulence-like manner;
go out fluid reservoir adoption the same and go out liquid tank internal arrangement structure, include: the liquid in the liquid outlet tank is collected and output, the liquid in the liquid outlet tank enters the dispersing device, and the liquid flow blocking device; the liquid collecting and outputting device in the liquid outlet tank is used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank and uniformly dividing the electrolyte into pipelines connected between the liquid outlet tank and each electric pile; the liquid in the liquid outlet tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid outlet tank.
In one embodiment of the invention, the liquid return tank and the liquid outlet tank in the flow battery system are horizontal tanks or vertical tanks.
In one embodiment of the present invention, the liquid collecting and outputting device in the liquid return tank includes:
a liquid collecting pipeline in the liquid return tank and a liquid outlet pipeline of the liquid return tank; the liquid collecting pipeline in the liquid return tank is arranged at the bottom layer in the liquid return tank, and a plurality of liquid collecting ports at the lower end in the tank with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid return tank; one end of the liquid outlet pipeline of the liquid return tank is connected with the liquid collecting pipeline in the liquid return tank, and the other end of the liquid outlet pipeline is connected with the pipeline of the liquid return tank leading to the liquid outlet tank in the same tank group.
In one embodiment of the present invention, the liquid in the liquid return tank enters the dispersing device, and the dispersing device comprises:
the liquid returning tank is connected with the liquid returning tank liquid inlet pipeline, the liquid returning tank conveying pipeline and the liquid returning tank liquid distribution pipeline in sequence; the liquid distribution pipeline of the liquid return tank is positioned on the inner top layer of the liquid return tank, and a plurality of liquid distribution openings with upward openings are arranged on the surface of the liquid distribution pipeline of the liquid return tank and are used for enabling electrolyte entering the liquid distribution pipeline of the liquid return tank to uniformly flow into the tank along the upper end of the tank wall.
In one embodiment of the present invention, the liquid collecting and outputting device in the liquid outlet tank includes:
a liquid collecting pipeline in the liquid outlet tank and a liquid outlet pipeline of the liquid outlet tank; the liquid collecting pipeline in the liquid outlet tank is arranged at the bottom layer in the liquid outlet tank, and a plurality of liquid collecting ports with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank; the number of the liquid outlet pipelines of the liquid outlet tank is matched with the number of the galvanic piles; one end of each liquid outlet pipe of each liquid outlet tank is connected with a liquid collecting pipe in the liquid outlet tank, and the other end of each liquid outlet pipe is connected with a pipe of the liquid outlet tank, which is communicated with the corresponding electric pile.
In one embodiment of the present invention, the liquid in the liquid outlet tank enters the dispersing device, and the dispersing device comprises:
a liquid outlet tank liquid inlet pipeline, a liquid outlet tank conveying pipeline and a liquid outlet tank liquid distribution pipeline which are connected in sequence; the liquid outlet tank liquid distribution pipeline is positioned on the inner top layer of the liquid outlet tank, and a plurality of liquid dispersion openings with upward openings are arranged on the surface of the liquid outlet tank liquid distribution pipeline and are used for enabling electrolyte entering the liquid outlet tank liquid distribution pipeline to uniformly flow into the tank along the upper end of the tank wall.
In one embodiment of the invention, the return tank delivery conduit is located at a midpoint of the return tank liquid distribution conduit;
the liquid outlet pipeline of the liquid return tank is communicated with the middle point of the liquid collecting pipeline in the liquid return tank;
each liquid outlet pipeline of the liquid outlet tank is communicated with the middle point of the liquid collecting pipeline in the liquid outlet tank;
the liquid outlet tank conveying pipeline is positioned at the midpoint of the liquid outlet tank liquid distribution pipeline.
In one embodiment of the invention, the liquid collecting pipeline in the liquid return tank and the liquid collecting pipeline in the liquid outlet tank are provided with a plurality of lower-end liquid collecting ports, and the liquid distributing pipeline in the liquid return tank and the liquid distributing pipeline in the liquid outlet tank are provided with a plurality of upper-end liquid distributing ports which are symmetrically and uniformly arranged in an axial manner at the position corresponding to the midpoint of the pipeline, and the caliber size of the opening is increased to two sides along the position corresponding to the midpoint of the pipeline.
In one embodiment of the invention, the liquid flow blocking device is a plurality of liquid flow blocking plates which are inserted in the liquid collecting pipeline in the liquid return tank, the liquid collecting pipeline in the liquid outlet tank, the liquid distributing pipeline of the liquid return tank and the liquid distributing pipeline of the liquid outlet tank at equal intervals, and the interval centers of the liquid flow blocking plates on the same pipeline correspond to a liquid dispersing port.
In one embodiment of the present invention, when the liquid return tank and the liquid outlet tank in the flow battery system are horizontal tanks, the liquid collecting pipe in the liquid return tank, the liquid distributing pipe in the liquid return tank, the liquid collecting pipe in the liquid outlet tank and the liquid distributing pipe in the liquid outlet tank are arranged along the tank length direction.
The invention has the beneficial effects that:
1. by adding the liquid collecting and outputting device, the liquid entering and dispersing device and the liquid flow blocking device in the tank, the electrolyte which has participated in the electrochemical reaction can be prevented from being quickly fused with the electrolyte which is to be participated in the electrochemical reaction after returning to the tank.
2. The method can reduce the rapid fusion of new and old electrolyte, and ensure that the electrolyte which does not participate in electrochemical reaction enters the pile in sequence, so that the consistency of the activity of the electrolyte can be ensured in the process that the whole electrolyte enters the pile for one cycle, and the pump can be maintained to operate under the uniform and lower-frequency working condition to the maximum extent.
3. Through the liquid collection output device in the jar, liquid gets into dispersion devices and liquid flow separation device, carries out jar inner tank outer circulation with liquid for jar inner liquid level change is comparatively mild, and the whole liquid level of real-time supervision of being convenient for brings the judgement basis for follow-up multiple battery control strategy, and wherein, multiple battery control strategy includes and is not limited to carry out electrolyte weeping judgement, positive negative pole electrolytic hydraulic pressure difference adjustment, jar outer electrolyte pipeline unobstructed state judgement etc..
Drawings
Fig. 1 is a schematic diagram of an arrangement structure in a liquid flow battery liquid tank in a liquid flow battery system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a flow battery system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal arrangement structure of a liquid return tank according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an internal arrangement structure of a liquid outlet tank according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a plurality of liquid dispersing ports disposed on each liquid collecting pipe and each liquid distributing pipe, and a corresponding liquid flow blocking device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the arrangement structure in a liquid flow battery liquid tank provided by the embodiment of the invention is applied to a liquid flow battery system, and the liquid flow battery system comprises: the device comprises a positive electrode tank group consisting of a positive electrode electrolyte return tank and a positive electrode electrolyte discharge tank, a negative electrode tank group consisting of a negative electrode electrolyte return tank and a negative electrode electrolyte discharge tank, and a galvanic pile; and pipelines are respectively connected between the liquid outlet tank and the galvanic pile, between the galvanic pile and the liquid return tank, and between the liquid return tank and the liquid outlet tank in the same tank group. Wherein, the positive electrolyte liquid return tank and the positive electrolyte liquid outlet tank are used for storing positive electrolyte; the negative electrode electrolyte liquid returning tank and the negative electrode electrolyte liquid discharging tank are used for storing negative electrode electrolyte; the galvanic pile is used for carrying out electrochemical reaction of positive and negative electrolytes.
In the embodiment of the invention, the liquid outlet tank is generally referred to as an anode electrolyte outlet tank and a cathode electrolyte outlet tank; the positive electrolyte return tank and the negative electrolyte return tank are generally referred to as a liquid return tank. The number of the positive electrode tank group, the negative electrode tank group and the galvanic pile can be multiple. The placement of each tank is not limited, for example, in an alternative embodiment, the liquid return tank and the liquid outlet tank in the flow battery system are horizontal tanks or vertical tanks, and the like.
In order to facilitate understanding of the solution of the embodiment of the present invention, first, a specific description is given of the structure of the flow battery system, please refer to the schematic structural diagram of the flow battery system shown in fig. 2, and reference numerals in fig. 2 are respectively as follows: 1-a positive electrolyte return tank; 2-discharging the positive electrolyte from the liquid tank; 3-a first galvanic pile; 4-second galvanic pile; 5-discharging the negative electrode electrolyte from the liquid tank; 6-a negative electrode electrolyte return tank; 7-positive electrode electrolyte return liquid collecting pipeline and 8-positive electrode electrolyte outlet pipeline (leading to a first electric pile); 9-positive electrolyte outlet pipe (leading to second pile); 10-negative electrolyte outlet pipe (leading to a first electric pile); 11-negative electrolyte outlet pipe (leading to second pile); 12-a negative electrode electrolyte return liquid collecting pipeline; 13-an anode electrolyte communication pipeline; 14-negative electrode electrolyte communication pipeline. It should be noted that, the crisscross lines on the upper and lower sides in fig. 2 do not indicate that the corresponding two pipes are in communication.
The working process of the flow battery system is as follows:
the positive electrolyte is stored in the positive electrolyte return tank 1 and the positive electrolyte discharge tank 2. When the whole flow battery system starts to operate, positive electrolyte enters a positive electrolyte liquid outlet pipeline 8 from a positive electrolyte liquid outlet tank 2 and is pumped into a first electric pile 3, positive electrolyte enters a positive electrolyte liquid outlet pipeline 9 from the positive electrolyte liquid outlet tank 2 and is pumped into a second electric pile 4, after electrochemical reaction is carried out on the two electric piles, the positive electrolyte liquid is collected to a positive electrolyte liquid return collecting pipeline 7 from the first electric pile 3 and the second electric pile 4, and then enters the positive electrolyte liquid return tank 1. Wherein, the positive electrode electrolyte flows out from the positive electrode electrolyte liquid return tank 1 to the positive electrode electrolyte communicating pipe 13 and then flows into the positive electrode electrolyte liquid outlet tank 2.
The negative electrode electrolyte is stored in a negative electrode electrolyte outlet tank 5 and a negative electrode electrolyte return tank 6. When the whole battery system starts to operate, negative electrolyte enters a negative electrolyte liquid outlet pipeline 10 from a negative electrolyte liquid outlet tank 5, is pumped into a first electric pile 3, and enters a negative electrolyte liquid outlet pipeline 11 from the negative electrolyte liquid outlet tank 5, is pumped into a second electric pile 4, and is collected to a negative electrolyte liquid return collecting pipeline 12 from two liquid return pipelines (below the electric piles) outside the first electric pile 3 and the second electric pile 4 after electrochemical reaction of the two electric piles. Wherein, the negative electrode electrolyte flows out to the negative electrode electrolyte communication pipeline 14 in the negative electrode electrolyte liquid return tank 6 and flows into the negative electrode electrolyte liquid outlet tank 5.
The arrangement structure in the liquid flow battery liquid tank is described below. In the arrangement structure in the liquid flow battery liquid tank:
the liquid return tank adopts the same liquid return tank internal arrangement structure, and comprises: the liquid in the liquid return tank is collected and output, enters the dispersing device and flows through the blocking device; the liquid collecting and outputting device in the liquid returning tank is used for uniformly collecting electrolyte at the bottom layer in the liquid returning tank and outputting the electrolyte to a pipeline of the liquid returning tank connected with the liquid outlet tank in the same tank group; the liquid in the liquid return tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid return tank; the liquid flow blocking device is used for carrying out turbulence on electrolyte in the tank and blocking liquid at the upper end and the lower end in the tank from flowing in a turbulence-like manner;
go out fluid reservoir adoption the same and go out liquid tank internal arrangement structure, include: the liquid in the liquid outlet tank is collected and output, the liquid in the liquid outlet tank enters the dispersing device, and the liquid flow blocking device; the liquid collecting and outputting device in the liquid outlet tank is used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank and uniformly dividing the electrolyte into pipelines connected between the liquid outlet tank and each electric pile; the liquid in the liquid outlet tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid outlet tank.
Compared with the existing liquid storage tank without any internal structure, the liquid storage tank is provided with the liquid collecting and outputting device in the liquid return tank, the liquid inlet dispersing device in the liquid return tank and the liquid flow blocking device. The liquid collecting and outputting device in the liquid returning tank is utilized to uniformly collect electrolyte at the bottom layer in the liquid returning tank and output the electrolyte to a pipeline of the liquid returning tank connected with the liquid outlet tank in the same tank group, so that the electrolyte in the liquid returning tank can sequentially and uniformly enter the liquid outlet tank in the same tank group. The electrolyte after reaction from the galvanic pile can be uniformly dispersed on the upper layer in the liquid return tank by utilizing the liquid in the liquid return tank to enter the dispersing device, so that the fusion speed of the liquid after reaction entering and the original liquid in the tank is reduced. And moreover, when the liquid flow blocking device is used for collecting electrolyte at the bottom layer in the liquid return tank and uniformly dispersing the electrolyte, the electrolyte in the tank can be disturbed, and the liquid at the upper end and the lower end in the blocking tank is in turbulent flow-like flow, so that the liquid level change is gentle.
Likewise, a liquid collecting and outputting device in a liquid outlet tank, a liquid inlet and dispersing device in the liquid outlet tank and a liquid flow blocking device are added in the liquid outlet tank; the liquid collecting and outputting device in the liquid outlet tank is utilized to uniformly collect electrolyte at the bottom layer in the liquid outlet tank, and the electrolyte is uniformly distributed and output to a pipeline connected between the liquid outlet tank and each pile according to the quantity of piles, so that the electrolyte to be involved in electrochemical reaction in the liquid outlet tank can sequentially and uniformly enter the piles. The electrolyte from the liquid return tank can be uniformly dispersed in the upper layer in the liquid outlet tank by utilizing the liquid in the liquid outlet tank to enter the dispersing device, so that the fusion speed of the entering liquid and the original liquid in the tank is reduced. And when the bottom electrolyte in the liquid outlet tank is collected by the liquid flow blocking device and the electrolyte which enters the liquid outlet tank is uniformly dispersed, the electrolyte in the tank can be disturbed, and the liquid at the upper end and the lower end in the blocking tank flows in a turbulent flow mode, so that the change of the liquid level is gentle.
On the basis of meeting the requirements, the embodiment of the invention can adopt any material and structural layout form to realize the specific structures of the liquid collecting and outputting device in the liquid returning tank, the liquid entering and dispersing device in the liquid returning tank, the liquid collecting and outputting device in the liquid discharging tank, the liquid entering and dispersing device in the liquid discharging tank and the liquid flow blocking device, for example, the liquid flow blocking device can be realized by utilizing the combination of pipelines, mechanical structures and the like of certain materials.
It can be seen that the embodiments of the present invention have the following effects:
1. by adding the liquid collecting and outputting device, the liquid entering and dispersing device and the liquid flow blocking device in the tank, the electrolyte which has participated in the electrochemical reaction can be prevented from being quickly fused with the electrolyte which is to be participated in the electrochemical reaction after returning to the tank.
2. The method can reduce the rapid fusion of new and old electrolyte, and ensure that the electrolyte which does not participate in electrochemical reaction enters the pile in sequence, so that the consistency of the activity of the electrolyte can be ensured in the process that the whole electrolyte enters the pile for one cycle, and the pump can be maintained to operate under the uniform and lower-frequency working condition to the maximum extent.
3. Through the liquid collection output device in the jar, liquid gets into dispersion devices and liquid flow separation device, carries out jar inner tank outer circulation with liquid for jar inner liquid level change is comparatively mild, and the whole liquid level of real-time supervision of being convenient for brings the judgement basis for follow-up multiple battery control strategy, and wherein, multiple battery control strategy includes and is not limited to carry out electrolyte weeping judgement, positive negative pole electrolytic hydraulic pressure difference adjustment, jar outer electrolyte pipeline unobstructed state judgement etc..
The structure in each can in the embodiments of the present invention will be specifically described below.
In an optional implementation manner, the liquid collecting and outputting device in the liquid return tank comprises:
a liquid collecting pipeline in the liquid return tank and a liquid outlet pipeline of the liquid return tank; the liquid collecting pipeline in the liquid return tank is arranged at the bottom layer in the liquid return tank, and a plurality of liquid collecting ports at the lower end in the tank with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid return tank; one end of the liquid outlet pipeline of the liquid return tank is connected with the liquid collecting pipeline in the liquid return tank, and the other end of the liquid outlet pipeline is connected with the pipeline of the liquid return tank leading to the liquid outlet tank in the same tank group.
In an alternative embodiment, the liquid in the liquid return tank enters the dispersing device, and the dispersing device comprises:
the liquid returning tank is connected with the liquid returning tank liquid inlet pipeline, the liquid returning tank conveying pipeline and the liquid returning tank liquid distribution pipeline in sequence; the liquid distribution pipeline of the liquid return tank is positioned on the inner top layer of the liquid return tank, and a plurality of liquid distribution openings with upward openings are arranged on the surface of the liquid distribution pipeline of the liquid return tank and are used for enabling electrolyte entering the liquid distribution pipeline of the liquid return tank to uniformly flow into the tank along the upper end of the tank wall.
In an optional implementation manner, the liquid collecting and outputting device in the liquid outlet tank comprises:
a liquid collecting pipeline in the liquid outlet tank and a liquid outlet pipeline of the liquid outlet tank; the liquid collecting pipeline in the liquid outlet tank is arranged at the bottom layer in the liquid outlet tank, and a plurality of liquid collecting ports with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank; the number of the liquid outlet pipelines of the liquid outlet tank is matched with the number of the galvanic piles; one end of each liquid outlet pipe of each liquid outlet tank is connected with a liquid collecting pipe in the liquid outlet tank, and the other end of each liquid outlet pipe is connected with a pipe of the liquid outlet tank, which is communicated with the corresponding electric pile.
In an alternative embodiment, the liquid in the liquid outlet tank enters the dispersing device, and the dispersing device comprises:
a liquid outlet tank liquid inlet pipeline, a liquid outlet tank conveying pipeline and a liquid outlet tank liquid distribution pipeline which are connected in sequence; the liquid outlet tank liquid distribution pipeline is positioned on the inner top layer of the liquid outlet tank, and a plurality of liquid dispersion openings with upward openings are arranged on the surface of the liquid outlet tank liquid distribution pipeline and are used for enabling electrolyte entering the liquid outlet tank liquid distribution pipeline to uniformly flow into the tank along the upper end of the tank wall.
In order to facilitate understanding of the embodiments of the present invention, the liquid return tank and the liquid outlet tank in the flow battery system are both illustrated as horizontal tanks, and please refer to fig. 1 and fig. 2, which are top views of the flow battery system, in which the long sides of the rectangle representing each tank represent the length direction of the tank. Regarding the form of the standing pot, please understand in connection with the sleeping pot scheme and the following description of the pertinence of the standing pot, the illustration of the standing pot is not performed separately.
When the liquid return tank and the liquid outlet tank in the flow battery system are horizontal tanks, in an optional implementation manner, the liquid collecting pipeline in the liquid return tank, the liquid distributing pipeline in the liquid return tank, the liquid collecting pipeline in the liquid outlet tank and the liquid distributing pipeline in the liquid outlet tank are arranged along the length direction of the tank. The above structure for the liquid collecting and outputting device in the liquid return tank and the liquid entering and dispersing device in the liquid return tank is understood with reference to fig. 3; for the structure of the liquid collecting and outputting device in the liquid outlet tank and the liquid entering and dispersing device in the liquid outlet tank, please refer to fig. 4 for understanding, the following description will be focused for convenience of understanding the scheme. Corresponding reference numerals in fig. 3 and 4 are: a, a liquid return tank conveying pipeline; 15-a liquid return tank liquid distribution pipeline; 16-a liquid outlet pipeline of the liquid return tank; 17-a liquid collecting pipeline in the liquid return tank; 18-a liquid inlet pipeline of the liquid return tank; b-a liquid outlet tank conveying pipeline; 19-a liquid dispensing line of the liquid discharge tank; 20-a liquid inlet pipeline of a liquid outlet tank; 21-a liquid outlet pipeline of a liquid outlet tank; 22-a liquid collecting pipeline of a liquid outlet tank; 23-a liquid outlet pipeline of the liquid outlet tank. Wherein, go out liquid tank drain pipe 21 and correspond first pile 3, go out liquid tank drain pipe 23 and correspond second pile 4.
Referring to fig. 3, after the whole flow battery system starts to operate, after the positive electrolyte which has undergone electrochemical reaction enters the positive electrolyte return tank 1 from the positive electrolyte return header line 7, and after the negative electrolyte which has undergone electrochemical reaction enters the negative electrolyte return tank 6 from the negative electrolyte return header line 12, the electrolyte is fed into the return tank liquid distribution line 15 from the return tank liquid feed line 18 through the return tank conveying line a, and the electrolyte is dispersed and equally distributed on the upper layer in the corresponding tank.
The electrolyte in the electrolyte return tank 1 is collected by a liquid collecting pipeline 17 in the return tank, collected by a bottom electrolyte in the return tank, is fed into a liquid outlet pipeline 16 of the return tank, and is fed into a positive electrolyte communicating pipeline 13 so as to enter the positive electrolyte liquid outlet tank 2. Similarly, the negative electrode electrolyte in the negative electrode electrolyte return tank 6 is collected by the liquid collecting pipeline 17 in the return tank, collected into the liquid outlet pipeline 16 of the return tank, and then sent into the negative electrode electrolyte communicating pipeline 14 so as to enter the negative electrode electrolyte liquid outlet tank 5.
In an alternative embodiment, the length of the liquid distribution pipeline of the liquid return tank and the length of the liquid collection pipeline in the liquid return tank are consistent with the length of the liquid return tank.
Specifically, the lengths of the liquid distribution pipeline 15 of the liquid return tank and the liquid collection pipeline 17 in the liquid return tank are consistent with the length of the liquid return tank, so that uniformity can be ensured when electrolyte at the bottom of the tank is collected and the electrolyte is dispersed to the top of the tank.
And, in an alternative embodiment, the return tank delivery conduit is located at a midpoint of the return tank liquid dispensing conduit; and the liquid outlet pipeline of the liquid return tank is communicated with the middle point of the liquid collecting pipeline in the liquid return tank.
Specifically, the liquid return tank conveying pipeline A is positioned at the middle point of the liquid return tank liquid distribution pipeline 15, so that the electrolyte distributed to two sections of the liquid return tank liquid distribution pipeline 15 is balanced; the liquid outlet pipeline 16 of the liquid return tank is communicated with the middle point of the liquid collecting pipeline 17 in the liquid return tank, and electrolyte can be collected uniformly through two sections of the liquid collecting pipeline 17 in the liquid return tank and is gathered into the liquid outlet pipeline 16 of the liquid return tank.
Referring to fig. 4, after the whole flow battery system starts to operate, the positive electrode electrolyte in the positive electrode electrolyte outlet tank 2 is collected by the liquid collecting pipeline 22 of the outlet tank, and the bottom electrolyte in the tank is collected and equally distributed to the liquid outlet pipelines 21 and 23 of the outlet tank, enters the positive electrode electrolyte outlet pipeline 8 through the liquid outlet pipeline 21 of the outlet tank, and is led to the first electric pile 3; enters the positive electrolyte liquid outlet pipeline 9 through the liquid outlet tank liquid outlet pipeline 23 and enters the second electric pile 4 for electrochemical reaction.
The negative electrolyte in the negative electrolyte liquid outlet tank 5 is collected by a liquid collecting pipeline 22 of the liquid outlet tank, collected and equally distributed to liquid outlet pipelines 21 and 23 of the liquid outlet tank, and enters a negative electrolyte liquid outlet pipeline 10 through the liquid outlet pipeline 21 of the liquid outlet tank to be led to a first electric pile 3; enters the negative electrolyte outlet pipeline 11 through the outlet tank outlet pipeline 23 and enters the second electric pile 4 for electrochemical reaction.
In an alternative embodiment for the sleeping tank, the lengths of the liquid distributing pipeline of the liquid outlet tank and the liquid collecting pipeline in the liquid outlet tank are consistent with the length of the liquid outlet tank.
Specifically, the lengths of the liquid distribution pipeline 19 of the liquid outlet tank and the liquid collection pipeline 22 in the liquid outlet tank are consistent with the length of the liquid outlet tank, so that uniformity can be ensured when electrolyte at the bottom of the tank is collected and dispersed to the top of the tank.
In an alternative implementation mode, each liquid outlet pipeline of the liquid outlet tank is communicated with the middle point of the liquid collecting pipeline in the liquid outlet tank; the liquid outlet tank conveying pipeline is positioned at the midpoint of the liquid outlet tank liquid distribution pipeline.
Specifically, each of the liquid outlet pipelines 21 and 23 is communicated with the middle point of the liquid collecting pipeline 22 in the liquid outlet tank, and electrolyte can be uniformly collected by two sections of the liquid collecting pipeline 22 in the liquid outlet tank to be distributed to the liquid outlet pipelines 21 and 23 of the liquid outlet tank; the delivery pipe B of the liquid outlet tank is positioned at the middle point of the liquid outlet tank liquid distribution pipe 19, so that the electrolyte distributed to two sections of the liquid outlet tank liquid distribution pipe 19 is balanced.
Regarding the liquid collecting pipeline in the liquid returning tank, the plurality of lower-end liquid collecting ports arranged on the liquid collecting pipeline in the liquid outlet tank, and the specific patterns of the liquid distributing pipeline of the liquid returning tank and the plurality of upper-end liquid distributing ports arranged on the liquid distributing pipeline of the liquid outlet tank, in an optional implementation manner, the liquid collecting pipeline in the liquid returning tank and the plurality of lower-end liquid collecting ports arranged on the liquid collecting pipeline in the liquid outlet tank, and the liquid distributing pipeline of the liquid returning tank and the plurality of upper-end liquid distributing ports arranged on the liquid distributing pipeline of the liquid outlet tank are axially symmetrically and uniformly arranged at the midpoint positions of the corresponding pipelines, and the opening caliber sizes are uniformly increased to two sides along the midpoint positions of the corresponding pipelines.
In an optional embodiment, the liquid flow blocking device is a plurality of liquid flow blocking plates which are equally spaced and inserted in the liquid collecting pipeline in the liquid returning tank, the liquid collecting pipeline in the liquid outlet tank, the liquid distributing pipeline of the liquid returning tank and the liquid distributing pipeline of the liquid outlet tank and are in cuboid patterns, and the spacing centers of the liquid flow blocking plates on the same pipeline correspond to a liquid dispersing port.
In an alternative embodiment, the curvature of each liquid flow baffle near the end of the inner surface of the tank coincides with the curvature of the inner surface of the near side tank.
Referring to fig. 5, reference numerals in fig. 5 are respectively: 24-upper liquid dispersion port; 25-a lower liquid collection port; 26-a liquid flow barrier at the top; 27-a liquid flow barrier at the bottom.
Specifically, the liquid distribution pipeline 15 of the liquid return tank and the liquid distribution pipeline 19 of the liquid outlet tank are all in the upper pipeline type in fig. 5, a plurality of upper liquid dispersing openings 24 are uniformly distributed on the pipeline, the openings of the dispersing openings are upward, the dispersing openings are axially symmetrically arranged from the midpoint position of the pipeline, and the opening diameters are uniformly increased along the central point of the pipeline to two sides. The dispersion opening is upwards, so that all electrolyte entering the pipeline can be upwards beaten out and flows into the electrolyte in the tank along the upper end of the tank wall. Because the center point of the pipeline increases the caliber of the dispersing opening to two sides, the liquid pressure at two ends of the liquid in the pipeline is small, and the middle pressure is large, the electrolyte fed by the liquid return tank conveying pipeline A and the liquid outlet tank conveying pipeline B can be uniformly distributed in the liquid return tank liquid distribution pipeline 15 and the liquid outlet tank liquid distribution pipeline 19. The arrangement structure can avoid the problem that in the prior art, electrolyte enters the tank to be poured into a large amount in a water column shape, so that the mixing of the electrolyte is quickened.
Similarly, the liquid collecting pipeline 17 in the liquid returning tank and the liquid collecting pipeline 22 in the liquid discharging tank are in the lower pipeline type in fig. 5, a plurality of lower liquid collecting ports 25 are uniformly distributed on the pipeline, the openings of the dispersing ports are downward, the dispersing ports are axially symmetrically arranged from the midpoint position of the pipeline, and the opening diameters are uniformly increased along the central point of the pipeline to two sides. The opening of the dispersing opening is downward, so that the liquid in the sending tank is the liquid at the bottom layer in the tank. The center point of the pipeline increases gradually to the two sides to disperse the aperture of the opening, so that the liquid is small in the pressure of the liquid inlet at the two ends in the pipe, and the middle pressure is large, and the electrolyte at the bottom of the tank body can be uniformly sucked. The arrangement structure can avoid the problem that electrolyte in the tank in the prior art flows out from one side of the opening in a large quantity and quickens the mixing of the electrolyte.
The number of the upper liquid distributing openings 24 and the lower liquid collecting openings 25 may be set as desired, for example, 12. This number 12 is exemplified below.
The liquid flow barrier 26 at the top is in a rectangular parallelepiped pattern. The upper end of the liquid return tank is consistent with the radian of the top end of the tank body, through holes are reserved in the middle positions of the liquid return tank, the liquid return tank and the liquid outlet tank, the liquid distribution pipeline 15 and the liquid distribution pipeline 19 penetrate through the through holes, the liquid flow baffle 26 divides the liquid return tank, the liquid outlet tank and the liquid distribution pipeline 15 and the liquid outlet tank, the liquid distribution pipeline 19 into 12 parts respectively, and an upper liquid dispersing port 24 is arranged in each middle position. The liquid flow baffle 26 divides the top end of the tank into equal length shapes, and liquid is sprayed upward from the dispersion openings to flow down the top tank wall and baffle. The liquid flow baffle plate 26 can play a role in turbulence of the electrolyte, and prevent the bottom liquid in the tank from flowing in a turbulence-like manner, so that the flow of the electrolyte in the tank is inhibited, and the electrolyte mixing is reduced. And the radian of the upper end of the liquid flow baffle plate 26 positioned at the top is consistent with that of the top end of the tank body, so that the liquid flow baffle plate 26 is tightly attached to the inner wall of the tank body, liquid is limited to be dispersed between two adjacent flow baffle plates 26, and better baffle turbulence effect can be realized.
Similarly, the liquid flow barrier 27 at the bottom is in a rectangular parallelepiped pattern. The lower end of the liquid collecting pipe is consistent with the radian of the bottom end of the tank body, through holes are reserved in the middle positions, the liquid collecting pipe 17 in the liquid returning tank and the liquid collecting pipe 22 in the liquid discharging tank penetrate through the through holes, the liquid flowing baffle plate 27 equally divides the liquid collecting pipe 17 in the liquid returning tank and the liquid collecting pipe 22 in the liquid discharging tank into 12 parts, and a lower-end liquid collecting port 25 is arranged in each middle position. The liquid flow baffle 27 divides the inner bottom of the tank into equal length shapes and liquid is sucked up from the collecting port. The liquid flow baffle plate 27 can play a role in turbulent flow of the electrolyte, and prevent the bottom liquid in the tank from flowing in a turbulent flow mode, so that the flow of the electrolyte is inhibited, and the electrolyte mixing is reduced. Likewise, the lower end of the liquid flow baffle plate 27 at the bottom is consistent with the radian of the bottom end of the tank body, so that better baffle and turbulence effects can be realized.
Of course, the form of the liquid flow baffle in the embodiment of the present invention is not limited to the above, and the plate form capable of blocking turbulence may be included in the protection scope of the embodiment of the present invention, for example, may be a trapezoid, a fan, etc.
When the liquid return tank and the liquid outlet tank in the flow battery system are vertical tanks, the liquid collecting pipeline in the liquid return tank, the liquid distributing pipeline in the liquid return tank, the liquid collecting pipeline in the liquid outlet tank and the liquid distributing pipeline in the liquid outlet tank are arranged along the horizontal direction, and the lengths of the liquid collecting pipeline and the liquid outlet tank are not more than the corresponding inner diameters of the tanks; the curvature of each end of each liquid flow barrier is not particularly limited.
From the above description, it can be seen that the in-can arrangement according to the embodiment of the present invention can be realized:
1. the positive/negative electrolyte is uniformly collected by a bottom pipeline in the tank and sent out of the tank; after the positive/negative electrolyte enters the tank, the liquid uniformly flows out from the upper layer pipeline to the upper layer of the liquid in the tank, so that the mixed liquid of the liquid in the tank can be reduced to the greatest extent. Therefore, the problem that the electrolyte which participates in the electrochemical reaction and the electrolyte which is to participate in the electrochemical reaction are quickly mixed after the electrolyte enters the galvanic pile reaction and returns to the tank through the liquid return pipe can be solved.
2. All the liquid at the lower layer of the liquid outlet tank is sent into the pile for electrochemical reaction, and the positive/negative liquid enters the upper layer of the liquid return tank, and the liquid at the lower layer of the liquid return tank is sent into the upper layer of the liquid outlet tank, so that the consistency of the activity of the electrolyte can be ensured in the process that the electrolyte integrally enters the pile for one cycle. Therefore, the concentration polarization of the electrolyte is reduced after the electrolyte is integrally circulated once, so that the difference polarization of the electrolyte in use can be effectively reduced, and the battery performance is improved. The system control is more favorable for saving the power consumption of non-battery parts, such as pumping work and electric equipment loss, and improving the utilization rate of the battery.
3. The liquid is outside the jar by lower floor's collection mouth collection liquid discharge jar in the jar, equally divide the liquid that gets into the jar by upper strata dispersion mouth, and liquid flow baffle can make the jar in the electrolyte flow obtain the suppression, and liquid level is surging when can reducing jar body business turn over liquid for the electrolyte liquid level in the jar slowly changes, and liquid level change is comparatively steady, is convenient for monitor real-time liquid level, brings more accurate data foundation for carrying out various battery control subsequently.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (7)
1. An arrangement structure in a liquid flow battery liquid tank, which is characterized in that the arrangement structure is applied to a liquid flow battery system, and the liquid flow battery system comprises: the device comprises a positive electrode tank group consisting of a positive electrode electrolyte return tank and a positive electrode electrolyte discharge tank, a negative electrode tank group consisting of a negative electrode electrolyte return tank and a negative electrode electrolyte discharge tank, and a galvanic pile; the liquid outlet tanks are connected with the galvanic pile, the galvanic pile and the liquid return tank, and the liquid return tank and the liquid outlet tank in the same tank group; in the arrangement structure in the liquid flow battery liquid tank:
the liquid return tank adopts the same liquid return tank internal arrangement structure, and comprises: the liquid in the liquid return tank is collected and output, enters the dispersing device and flows through the blocking device; the liquid collecting and outputting device in the liquid returning tank is used for uniformly collecting electrolyte at the bottom layer in the liquid returning tank and outputting the electrolyte to a pipeline of the liquid returning tank connected with the liquid outlet tank in the same tank group; the liquid collection output device in the liquid return tank comprises: a liquid collecting pipeline in the liquid return tank and a liquid outlet pipeline of the liquid return tank; the liquid collecting pipeline in the liquid return tank is arranged at the bottom layer in the liquid return tank, and a plurality of liquid collecting ports at the lower end in the tank with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid return tank; one end of the liquid outlet pipeline of the liquid return tank is connected with the liquid collecting pipeline in the liquid return tank, and the other end of the liquid outlet pipeline is connected with a pipeline of the liquid return tank leading to the liquid outlet tank in the same tank group;
the liquid in the liquid return tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid return tank; the liquid in the liquid return tank enters the dispersing device and comprises: the liquid returning tank is connected with the liquid returning tank liquid inlet pipeline, the liquid returning tank conveying pipeline and the liquid returning tank liquid distribution pipeline in sequence; the liquid distribution pipeline of the liquid return tank is positioned on the inner top layer of the liquid return tank, and a plurality of liquid distribution openings with upward openings are arranged on the surface of the liquid distribution pipeline of the liquid return tank and are used for enabling electrolyte entering the liquid distribution pipeline of the liquid return tank to uniformly flow into the tank along the upper end of the tank wall;
the liquid flow blocking device is used for carrying out turbulence on electrolyte in the tank and blocking liquid at the upper end and the lower end in the tank from flowing in a turbulence-like manner;
go out fluid reservoir adoption the same and go out liquid tank internal arrangement structure, include: the liquid in the liquid outlet tank is collected and output, the liquid in the liquid outlet tank enters the dispersing device, and the liquid flow blocking device; wherein, go out liquid collection output device in the fluid reservoir, include: a liquid collecting pipeline in the liquid outlet tank and a liquid outlet pipeline of the liquid outlet tank; liquid in the play liquid jar gets into dispersion devices, includes:
a liquid outlet tank liquid inlet pipeline, a liquid outlet tank conveying pipeline and a liquid outlet tank liquid distribution pipeline which are connected in sequence;
the liquid collecting and outputting device in the liquid outlet tank is used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank and uniformly dividing the electrolyte into pipelines connected between the liquid outlet tank and each electric pile; the liquid in the liquid outlet tank enters the dispersing device and is used for uniformly dispersing the entered electrolyte in the upper layer in the liquid outlet tank;
the liquid flow blocking device is a plurality of liquid flow blocking plates which are uniformly inserted in the liquid collecting pipeline in the liquid return tank, the liquid collecting pipeline in the liquid outlet tank, the liquid distribution pipeline of the liquid return tank and the liquid distribution pipeline of the liquid outlet tank and are in cuboid shapes, and the space centers of the liquid flow blocking plates on the same pipeline correspond to a liquid dispersing port.
2. The arrangement of claim 1, wherein the liquid return tank and the liquid outlet tank in the flow battery system are horizontal tanks or vertical tanks.
3. The arrangement structure in the liquid tank of the flow battery according to claim 1, wherein the liquid collecting pipeline in the liquid outlet tank is arranged at the bottom layer in the liquid outlet tank, and a plurality of liquid collecting ports at the lower end in the tank with downward openings are arranged on the surface of the liquid collecting pipeline and are used for uniformly collecting electrolyte at the bottom layer in the liquid outlet tank; the number of the liquid outlet pipelines of the liquid outlet tank is matched with the number of the galvanic piles; one end of each liquid outlet pipe of each liquid outlet tank is connected with a liquid collecting pipe in the liquid outlet tank, and the other end of each liquid outlet pipe is connected with a pipe of the liquid outlet tank, which is communicated with the corresponding electric pile.
4. The arrangement structure in the liquid tank of the flow battery according to claim 3, wherein the liquid distribution pipeline of the liquid outlet tank is positioned on the inner top layer of the liquid outlet tank, and a plurality of liquid distribution openings at the upper end in the tank are arranged on the surface of the liquid distribution pipeline, so that electrolyte entering the liquid distribution pipeline of the liquid outlet tank uniformly flows into the tank along the upper end of the tank wall.
5. The arrangement in a liquid flow battery tank as set forth in claim 4, wherein,
the liquid return tank conveying pipeline is positioned at the midpoint of the liquid return tank liquid distribution pipeline;
the liquid outlet pipeline of the liquid return tank is communicated with the middle point of the liquid collecting pipeline in the liquid return tank;
each liquid outlet pipeline of the liquid outlet tank is communicated with the middle point of the liquid collecting pipeline in the liquid outlet tank;
the liquid outlet tank conveying pipeline is positioned at the midpoint of the liquid outlet tank liquid distribution pipeline.
6. The arrangement structure in the liquid tank of the flow battery according to claim 5, wherein the liquid collecting pipeline in the liquid returning tank and the liquid collecting pipeline in the liquid outlet tank are provided with a plurality of lower-end liquid collecting ports, and the liquid distributing pipeline of the liquid returning tank and the liquid distributing pipeline of the liquid outlet tank are provided with a plurality of upper-end liquid distributing ports which are arranged in an axisymmetric and uniform manner at the midpoint position of the corresponding pipeline, and the opening caliber sizes are increased gradually and uniformly towards two sides along the midpoint position of the corresponding pipeline.
7. The arrangement of any one of claims 2 to 6, wherein when the liquid return tank and the liquid discharge tank in the flow battery system are horizontal tanks, the liquid collection pipe in the liquid return tank, the liquid distribution pipe in the liquid discharge tank, and the liquid collection pipe in the liquid discharge tank are disposed along the tank length direction.
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