CN114220997A - Kilowatt-level zinc-iron redox flow battery performance test system - Google Patents
Kilowatt-level zinc-iron redox flow battery performance test system Download PDFInfo
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- CN114220997A CN114220997A CN202111520257.6A CN202111520257A CN114220997A CN 114220997 A CN114220997 A CN 114220997A CN 202111520257 A CN202111520257 A CN 202111520257A CN 114220997 A CN114220997 A CN 114220997A
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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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
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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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
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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
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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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
Abstract
The invention relates to the technical field of flow batteries, and provides a kilowatt-level zinc-iron flow battery performance testing system which can realize all-around testing of battery performance, including flow, temperature and voltage, can comprehensively evaluate performance parameters of various aspects of a battery, and can bring comprehensive guarantee to large-scale energy storage system integration. The zinc-iron redox flow battery pile applying the testing method can obtain more comprehensive testing data aiming at the parameters such as pile leakage, charge-discharge efficiency, battery capacity attenuation and the like.
Description
Technical Field
The invention relates to the technical field of flow batteries, in particular to a kilowatt-level zinc-iron flow battery performance testing system.
Background
Due to its excellent safety, the zn-fe flow battery has received attention from more and more researchers as one of the most promising energy storage batteries for large-scale application. The composition of the zinc-iron flow battery is different from that of the traditional battery, and a pump is needed for driving electrolyte to circulate inside a pile so as to realize conversion between electric energy and chemical energy. Due to the structural form, the zinc-iron flow battery needs to monitor data such as current, voltage and temperature of the battery during operation, and also needs to monitor parameters such as pressure, flow and temperature of electrolyte in real time so as to realize comprehensive evaluation of battery performance. At present, no relevant research report exists in a performance test method for a kilowatt-level zinc-iron flow battery system, and the invention provides a feasible solution for the performance test of the zinc-iron flow battery.
Disclosure of Invention
The invention aims to provide a kilowatt-level zinc-iron flow battery performance testing system to solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a kilowatt-level zinc-iron redox flow battery capability test system, test system includes redox flow battery stack, positive electrolyte container, negative electrode electrolyte container, first flow pipeline, second flow pipeline, third flow pipeline, fourth flow pipeline, first power pump, second power pump, third power pump and fourth power pump, redox flow battery capability test system still includes:
the first flow collecting container is communicated with first liquid flow ports on the outer side of a positive electrode reaction cavity of the flow battery stack, the first flow collecting container is communicated with the positive electrode electrolyte container through a first liquid flow pipeline, and the first power pump is arranged on the first liquid flow pipeline;
the second flow ports on the outer side of the positive electrode reaction cavity of the flow battery stack are communicated with the second flow collecting container, the second flow collecting container is communicated with the positive electrode electrolyte container through a second flow pipeline, and the second power pump is arranged on the second flow pipeline;
the first liquid flow ports on the outer side of the negative electrode reaction cavity of the flow battery stack are communicated with the third flow collecting container, the third flow collecting container is communicated with the negative electrode electrolyte container through a third liquid flow pipeline, and the third power pump is arranged on the third liquid flow pipeline;
and second liquid flow ports on the outer side of the negative electrode reaction cavity of the flow battery stack are communicated with the fourth flow collecting container, the fourth flow collecting container is communicated with the negative electrode electrolyte container through a fourth liquid flow pipeline, and the fourth power pump is arranged on the fourth liquid flow pipeline.
Preferably, the liquid flow ports are communicated with the first collecting container, the second collecting container, the third collecting container or the fourth collecting container through independent connecting pipelines.
Preferably, the battery pack further comprises a voltage monitoring module for monitoring the voltage of the single battery.
Preferably, the electrolyte tank also comprises stirring paddles, and the stirring paddles are arranged in the positive electrolyte container and the negative electrolyte container.
Preferably, the battery further comprises an exhaust port arranged at the top of the positive electrode electrolyte container and the negative electrode electrolyte container.
Preferably, the system further comprises a first temperature sensor for monitoring the ambient temperature in real time.
Preferably, the electrolyte tank further comprises a heater, and the positive electrolyte container and the negative electrolyte container are both provided with the heater and used for controlling the temperature of the electrolyte in real time.
Preferably, the electrolyte inlet pipes of the first liquid flow pipeline and the third liquid flow pipeline are provided with bypass reserved ports for performing power expansion on the test system at a later stage.
Preferably, the flow cell further comprises a second temperature sensor and a flow sensor arranged at the opening of the flow cell stack, and the second temperature sensor and the flow sensor are used for measuring the pressure and temperature changes of the electrolyte after passing through the flow cell stack.
Preferably, the electrolyte flow meter further comprises flow meters, which are arranged at the liquid inlets of the first liquid flow pipeline and the third liquid flow pipeline and are used for measuring the electrolyte flow value.
One or more technical solutions described above in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the invention provides a kilowatt-level zinc-iron flow battery performance testing system, which can realize all-around testing of battery performance, including flow, temperature and voltage, can comprehensively evaluate all performance parameters of a battery, and can bring comprehensive guarantee to large-scale energy storage system integration. The zinc-iron redox flow battery pile applying the testing method can obtain more comprehensive testing data aiming at the parameters such as pile leakage, charge-discharge efficiency, battery capacity attenuation and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a test system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flow cell stack according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a portion of a flow cell stack provided by an embodiment of the invention;
fig. 4 is a cross-sectional view of a portion of a flow cell stack provided by an embodiment of the invention;
fig. 5 is a front view of a flow cell stack portion provided by an embodiment of the invention;
FIG. 6 is a schematic structural diagram of a flow frame according to an embodiment of the present invention;
FIG. 7 is a top view of a fluidic block provided by an embodiment of the present invention;
FIG. 8 is an enlarged view of A in FIG. 7;
FIG. 9 is a schematic structural diagram of an ion exchange membrane provided in an embodiment of the present invention;
fig. 10 is a schematic structural view of a current collecting plate and an electrode according to an embodiment of the present invention;
wherein, in the figures, the respective reference numerals:
1. a positive electrolyte container 2, a negative electrolyte container 3, a flow battery stack 31, a flow frame 3101, a surrounding plate 3102, a first side plate 3103, a second side plate 301, a positive flow frame 302, a negative flow frame 32, a current collecting plate 33, an electrode 34, a fixing frame 35, an ion exchange membrane 36, a first flow port 37, a second flow port 38, a flow cavity 39, a membrane flap 310, the system comprises a gathering area 311, a diffusion area 312, a mounting plate 313, a positive pole reaction chamber 314, a negative pole reaction chamber 4, a first liquid flow pipeline 5, a second liquid flow pipeline 6, a third liquid flow pipeline 7, a fourth liquid flow pipeline 8, a first power pump 9, a second power pump 10, a third power pump 11, a fourth power pump 12, a first collecting container 13, a second collecting container 14, a third collecting container 15 and a fourth collecting container.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The embodiment of the invention provides a flow battery stack and a flow battery system, belonging to the technical field of flow batteries, and the application scene can be as follows: zinc-iron flow battery and its system. It can be understood that in the prior art, electrochemical polarization of the flow battery is caused by different ion concentrations of the electrolyte reacted at different parts of the electrode, so that zinc dendrite growth adversely affects the efficient performance of the battery, for example, zinc dendrite growth penetrates an ionic membrane to cause internal short circuit of the battery.
Therefore, there is a need to solve the problem of maintaining the ion concentration of the electrolyte solution in the reaction at each part of the electrode uniform.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 2 to 10, the present embodiment provides a flow battery stack 3 including mounting plates 312 and single cells arranged in an array between the mounting plates 312, the single cells including an ion exchange membrane 35, a current collecting plate 32, a flow frame, an electrode 33, and a flow port; the collector plates 32 are disposed on both sides of the ion exchange membrane 35; the liquid flow frame comprises a positive liquid flow frame 301 and a negative liquid flow frame 302 which are respectively arranged on two sides of the ion exchange membrane 35, and two reaction chambers are formed on two sides of the ion exchange membrane 35 together with the current collecting plate 32, wherein one reaction chamber is a positive reaction chamber 313, and the other reaction chamber is a negative reaction chamber 314; the electrode 33 comprises a positive electrode 33 and a negative electrode 33, which are respectively arranged on the current collecting plates 32 on two sides of the ion exchange membrane 35, the positive electrode 33 is positioned in the positive reaction chamber 313, and the negative electrode 33 is positioned in the negative reaction chamber 314; the liquid flow ports comprise a first liquid flow port 36 and a second liquid flow port 37, the first liquid flow port 36 and the second liquid flow port 37 are arranged on the outer side of the liquid flow frame 31 in a staggered mode, and the first liquid flow port 36 and the second liquid flow port 37 penetrate through the liquid flow frame 31 to be communicated with the positive electrode reaction cavity 313 or the negative electrode reaction cavity 314.
In some embodiments, the mounting plates 312 are arranged in a clamping arrangement on both sides of the stack of cells stacked in an array.
In some embodiments, the ion exchange membrane 35 is a porous membrane.
In some embodiments, the electrode 33 is a graphite plate, a metal plate, or a carbon cloth.
In some embodiments, the positive electrolyte in positive reaction chamber 313 is a mixture of demineralized water, a strong base, and tetrasodium hexacyanoferrate decahydrate.
In some embodiments, the negative electrolyte in the negative reaction chamber 314 is a mixture of demineralized water, a zinc compound, a strong base, and potassium sodium tartrate.
Specifically, referring to fig. 3, the negative electrode 33 of one cell of the present embodiment is connected to the positive electrode 33 of an adjacent cell through a current collecting plate 32, the positive electrode 33 is connected to the negative electrode 33 of another adjacent cell through another current collecting plate 32, and the flow frame 31 outside the electrode 33 is laminated between the ion exchange membrane 35 and the current collecting plate 32, thereby forming the structure of the cell stack.
For example, referring to fig. 7, the flow frame 31 has a ring-shaped structure, a reaction chamber is inside the flow frame 31, the first flow ports 36 and the second flow ports 37 are alternately arranged on the outer side of the flow frame 31, the electrolyte flows into the reaction chamber from the first flow ports 36, and after the electrolyte reacts with the electrode 33, the electrolyte flows out from the second flow ports 37 on both sides of the first flow ports 36, so that locally uniform electrolyte circulation is formed at each part of the electrode 33, the ion concentration of the electrolyte reacted at each part of the electrode 33 is kept consistent, electrochemical polarization of the flow battery is prevented, and adverse effects on the high efficiency of the battery due to the growth of zinc dendrites are avoided.
In some embodiments, referring to fig. 7 and 8, a liquid flow cavity 38 is formed in the flow frame 31, the first liquid flow port 36 penetrates into the flow frame 31 to communicate with the liquid flow cavity 38, and the second liquid flow port 37 penetrates through the flow frame 31 to communicate with the reaction cavity; both sides of one end of the second liquid flow port 37 in the reaction cavity are provided with petals 39, an accumulation area 310 and a diffusion area 311 are formed between the adjacent petals 39, and the diffusion area 311 is positioned between the adjacent accumulation areas 310; one end of the diffusion region 311 is communicated with the liquid flow cavity 38, and the other end is communicated with the reaction cavity, and is used for diffusing the electrolyte flowing into the reaction cavity from the liquid flow cavity 38; one end of the gathering region 310 is wrapped around one end of the second flow port 37 in the reaction chamber, and the other end is communicated with the reaction chamber, so as to gather the electrolyte flowing into the reaction chamber from the second flow port 37.
Illustratively, when the concentration of the electrolyte is above the threshold, the first flow port 36 is an electrolyte inlet, the second flow port 37 is an electrolyte outlet, the electrolyte with high concentration flows into the flow chamber 38 from the first flow port 36, flows out from the gap between the adjacent petals 39 after reaction (refer to the direction of the arrow in fig. 7 as the flow direction of the electrolyte), and then flows into the diffusion region 311 by squeezing through the gap between the petals 39, the flow rate of the electrolyte squeezing through the gap between the petals 39 is accelerated, and then the electrolyte enters the diffusion region 311 to be in contact reaction with the electrode 33 in a diffusion flow manner, so that the uniformity of the concentration of the electrolyte at each part of the electrode 33 is further ensured.
When the first liquid flow port 36 is an electrolyte inlet, the speed of the electrolyte with high ion concentration entering the reaction chamber in a diffusion flow mode can be reduced, so that the electrolyte with high ion concentration has enough time to fully contact and react with the electrode 33, and the full progress of the reaction is ensured; on the contrary, if the electrolyte with high ion concentration is fed into and discharged from the reaction chamber, the reaction can be smoothly performed, but each reaction is insufficient, only a small part of the electrolyte with high ion concentration is reacted, and the reaction amount entering the reaction chamber in a diffusion flow manner can be achieved by multiple reactions, so that the efficiency is undoubtedly low.
Illustratively, when the ion concentration of the electrolyte is at or below the threshold, the second flow port 37 is an electrolyte inlet, the first flow port 36 is an electrolyte outlet, the electrolyte with low ion concentration flows into the accumulation region 310 from the second flow port 37, then the electrolyte with low ion concentration in the accumulation region 310 pushes through the gap between the petals 39 and flows into the reaction chamber, the flow rate of the electrolyte pushing through the gap between the petals 39 is accelerated, and then rapidly flows through the reaction with each part of the electrode 33, and then flows out from the gap between the petals 39 between the diffusion regions 311, and the electrolyte with low ion concentration accelerated to flow through the electrode 33 can ensure that enough ion amount reacts with the electrode 33 in unit time, thereby ensuring the stable output voltage of the battery under the condition of low ion concentration of the electrolyte.
In some embodiments, referring to fig. 6 and 7, the flow frame 31 includes a peripheral plate 3101, a first side plate 3102 and a second side plate 3103, the peripheral plate 3101 being two concentrically arranged annular plates; the first side plate 3102 is provided on the side of the annular plate close to the ion exchange membrane 35; the second side plate 3103 is disposed on the side of the annular plate away from the ion exchange membrane 35; the space formed between the peripheral plate 3101 and the first and second side plates 3102 and 3103 is the chamber 38, and the spaces formed between the flaps 39 and the first and second side plates 3102 and 3103 are the accumulation region 310 or the diffusion region 311.
It should be noted that the petals 39 of the accumulation region 310 and the diffusion region 311 are the "splay" petals 39 alternately arranged, the heads of the "splay" petals 39 of the accumulation region 310 are close to the electrodes 33, while the heads of the "splay" petals 39 of the diffusion region 311 are positioned in the liquid flow cavity 38, so that the electrolyte flowing in from the heads of the "splay" petals 39 of the diffusion region 311 has enough space for diffusion, while the electrolyte flowing out from the heads of the "splay" petals 39 of the accumulation region 310 directly contacts and reacts with the electrodes 33, therefore, when the ion concentration of the electrolyte is the same, the electrolyte flowing out from the accumulation region 310 does not diffuse and then reacts with the electrodes 33, and directly reacts with the electrodes 33, that is, the ion concentration of the electrolyte flowing out from the accumulation region 310 and reacting with the electrodes 33 is higher than that of the electrolyte flowing in from the diffusion region 311 and reacting with the electrodes 33, which makes the ion concentration of the electrolyte be at or below the threshold value, the accumulation region 310 can relatively increase the ion concentration of the electrolyte, and further ensure that the battery can output a stable voltage even at a lower ion concentration of the electrolyte.
In some embodiments, referring to fig. 2-10, the first side plate 3102 and the second side plate 3103 are both annular plates; the collector plates 32 are embedded between the inner walls of the second side plates 3103 and used for isolating the reaction chambers of the adjacent single cells; the second side plate 3103 adjacent to the flow frame 31 is the same side plate. Preferably, the ion exchange membrane 35 includes an ion exchange membrane 35 body and a fixing frame 34 disposed outside the ion exchange membrane 35 body; the fixing frame 34 is an elastic sealing frame laminated between the first side plate 3102 on both sides thereof.
When the cell stack is installed, the current collecting plate 32 with the electrode 33 plate is installed between the inner walls of the second side plate 3103, the liquid flow frame 31 and the first side plate 3102 are integrally formed, then the ion exchange membrane 35 is placed between the two liquid flow frames 31, the two liquid flow frames 31 are laminated on two sides of the fixing frame 34, then a certain number of single cells are stacked at one time to form the cell stack, and finally, two installing plates 312 are arranged on two sides of the cell stack in a pressing mode to laminate all the single cells together, so that the cell stack of the embodiment is very convenient to install.
The invention also provides a kilowatt-level zinc-iron redox flow battery performance testing system, referring to fig. 1, the redox flow battery system comprises the redox flow battery stack 3, a positive electrolyte container 1, a negative electrolyte container 2, a first redox flow pipeline 4, a second redox flow pipeline 5, a third redox flow pipeline 6, a fourth redox flow pipeline 7, a first power pump 8, a second power pump 9, a third power pump 10 and a fourth power pump 11, and the redox flow battery system further comprises:
the first flow collecting container 12 is communicated with the first flow port 36 outside the anode reaction chamber 313, the first flow collecting container 12 is communicated with the anode electrolyte container 1 through the first flow pipeline 4, and the first power pump 8 is arranged on the first flow pipeline 4;
the second collecting container 13 is communicated with the second liquid flow port 37 outside the anode reaction cavity 313, the second collecting container 13 is communicated with the anode electrolyte container 1 through the second liquid flow pipeline 5, and the second power pump 9 is arranged on the second liquid flow pipeline 5;
the first liquid flow ports 36 outside the negative electrode reaction chambers 314 are communicated with the third collecting container 14, the third collecting container 14 is communicated with the negative electrode electrolyte container 2 through the third liquid flow pipeline 6, and the third power pump 10 is arranged on the third liquid flow pipeline 6;
the second liquid flow ports 37 on the outer side of the negative electrode reaction chamber 314 are all communicated with the fourth collecting container 15, the fourth collecting container 15 is communicated with the negative electrode electrolyte container 2 through the fourth liquid flow pipeline 7, and the fourth power pump 11 is arranged on the fourth liquid flow pipeline 7.
Illustratively, when the ion concentration of the electrolyte is higher than the threshold value, the first power pump 8 and the third power pump 10 pump out the electrolyte so that the electrolyte flows in from the first flow port 36, whereas when the ion concentration of the electrolyte is equal to or lower than the threshold value, the second power pump 9 and the fourth power pump 11 pump out the electrolyte so that the electrolyte flows out from the second flow port 37.
In some embodiments, the flow ports are each in communication with the first header vessel 12, the second header vessel 13, the third header vessel 14, or the fourth header vessel 15 via a separate connecting conduit.
In some embodiments, a voltage monitoring module is further included for monitoring the voltage of the cells.
For example, in this embodiment, the voltage of the cell is monitored to determine whether the reacted electrolyte ion concentration is lower than the threshold, and once the voltage is monitored to continuously decrease for a certain time, it can be determined that the reacted electrolyte ion concentration is lower than the threshold, and the second power pump 9 and the fourth power pump 11 are started as output pumps of the electrolyte, so that the electrolyte flows out from the second liquid flow port 37.
In some embodiments, the electrolyte container further comprises a stirring paddle, and the stirring paddles are arranged in the positive electrolyte container 1 and the negative electrolyte container 2, so that the electrolyte in the electrolyte containers is uniform.
In some embodiments, a vent is provided at the top of the positive electrolyte container 1 and the negative electrolyte container 2 to facilitate timely venting of the secondary reactant gas.
In some embodiments, a first temperature sensor is included for monitoring ambient temperature in real time.
In some embodiments, the electrolyte tank further comprises a heater, and the positive electrolyte container and the negative electrolyte container are both provided with the heater for controlling the electrolyte temperature in real time.
In some embodiments, the electrolyte inlets of the first flow pipeline 4 and the third flow pipeline 6 are provided with bypass reserved ports for performing power expansion on the test system at a later stage.
In some embodiments, a second temperature sensor and a flow sensor are provided at the flow cell stack 3 port for measuring the pressure and temperature changes of the electrolyte after passing through the flow cell stack 3.
In some embodiments, flow meters are further included and are disposed at the liquid inlets of the first flow conduit 4 and the third flow conduit 6 for measuring the electrolyte flow rate value.
The testing system can realize all-around testing of the battery performance, including flow, temperature and voltage, can comprehensively evaluate performance parameters of all aspects of the battery, and can bring comprehensive guarantee to large-scale energy storage system integration. The zinc-iron redox flow battery pile applying the testing method can obtain more comprehensive testing data aiming at the parameters of pile leakage, charge-discharge efficiency, battery capacity attenuation and the like
In one embodiment, the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a kilowatt-level zinc-iron redox flow battery capability test system, a serial communication port, test system includes redox flow battery stack, positive electrolyte container, negative electrode electrolyte container, first flow pipeline, second flow pipeline, third flow pipeline, fourth flow pipeline, first power pump, second power pump, third power pump and fourth power pump, redox flow battery capability test system still includes:
the first flow collecting container is communicated with first liquid flow ports on the outer side of a positive electrode reaction cavity of the flow battery stack, the first flow collecting container is communicated with the positive electrode electrolyte container through a first liquid flow pipeline, and the first power pump is arranged on the first liquid flow pipeline;
the second flow ports on the outer side of the positive electrode reaction cavity of the flow battery stack are communicated with the second flow collecting container, the second flow collecting container is communicated with the positive electrode electrolyte container through a second flow pipeline, and the second power pump is arranged on the second flow pipeline;
the first liquid flow ports on the outer side of the negative electrode reaction cavity of the flow battery stack are communicated with the third flow collecting container, the third flow collecting container is communicated with the negative electrode electrolyte container through a third liquid flow pipeline, and the third power pump is arranged on the third liquid flow pipeline;
and second liquid flow ports on the outer side of the negative electrode reaction cavity of the flow battery stack are communicated with the fourth flow collecting container, the fourth flow collecting container is communicated with the negative electrode electrolyte container through a fourth liquid flow pipeline, and the fourth power pump is arranged on the fourth liquid flow pipeline.
2. The performance testing system of a kilowatt-level zinc-iron flow battery according to claim 1, wherein the flow ports are all in communication with the first collecting container, the second collecting container, the third collecting container or the fourth collecting container through separate connecting pipes.
3. The performance testing system of the kilowatt-level zinc-iron flow battery according to claim 2, further comprising a voltage monitoring module for monitoring the voltage of a single cell.
4. The performance testing system of a kilowatt-level zinc-iron flow battery according to claim 1, further comprising a paddle, wherein the paddles are disposed in both the positive electrolyte container and the negative electrolyte container.
5. The performance testing system of a kilowatt-scale zinc-iron flow battery of claim 1, further comprising an air vent disposed at the top of said positive electrolyte container and said negative electrolyte container.
6. The performance testing system of the kilowatt-level zinc-iron flow battery according to claim 1, further comprising a first temperature sensor for monitoring the ambient temperature in real time.
7. The performance testing system of a kilowatt-level zinc-iron flow battery according to claim 1, further comprising a heater, wherein the heaters are arranged on both the positive electrolyte container and the negative electrolyte container, and are used for controlling the temperature of the electrolyte in real time.
8. The performance testing system of a kilowatt-level zinc-iron flow battery of claim 1, wherein the electrolyte inlet pipe of the first flow pipeline and the electrolyte inlet pipe of the third flow pipeline are both provided with a bypass reserved port for performing power expansion on the testing system at a later stage.
9. The system for testing the performance of a kilowatt-level zinc-iron flow battery according to claim 1, further comprising a second temperature sensor and a flow sensor arranged at the opening of the flow battery stack and used for measuring the pressure and temperature changes of electrolyte after passing through the flow battery stack.
10. The performance testing system of the kilowatt-level zinc-iron flow battery of claim 1, further comprising flow meters arranged at the liquid inlets of the first liquid flow pipeline and the third liquid flow pipeline and used for measuring the electrolyte flow value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116148681A (en) * | 2023-04-24 | 2023-05-23 | 北京和瑞储能科技有限公司 | Method for predicting performance of iron-chromium flow battery |
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