CN114518429B - Testing device and method for vanadium battery electrolyte evaluation - Google Patents
Testing device and method for vanadium battery electrolyte evaluation Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 226
- 239000003792 electrolyte Substances 0.000 title claims abstract description 207
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 89
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000011156 evaluation Methods 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 17
- 229910001456 vanadium ion Inorganic materials 0.000 claims abstract description 89
- 238000004451 qualitative analysis Methods 0.000 claims abstract description 65
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 64
- 238000010998 test method Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 8
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 238000004448 titration Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical class [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000001939 inductive effect Effects 0.000 claims 2
- 238000001228 spectrum Methods 0.000 claims 2
- 238000012545 processing Methods 0.000 claims 1
- 238000009616 inductively coupled plasma Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
- G01N31/162—Determining the equivalent point by means of a discontinuity
- G01N31/164—Determining the equivalent point by means of a discontinuity by electrical or electrochemical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
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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
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Abstract
The invention discloses a testing device for evaluating electrolyte of a vanadium battery, which comprises an electrolyte temperature testing device, a vanadium ion valence state capacity testing device and an element qualitative and quantitative analysis device, wherein the testing cavities of the electrolyte temperature testing device, the vanadium ion valence state capacity testing device and the element qualitative and quantitative analysis device are respectively provided with a liquid inlet pipeline and a liquid outlet pipeline, the testing cavities of the electrolyte temperature testing device and the vanadium ion valence state capacity testing device are communicated through a communicating pipeline, the testing cavities of the vanadium ion valence state capacity testing device and the element qualitative and quantitative analysis device are communicated through a communicating pipeline, valves are arranged in all the liquid inlet pipelines, the liquid outlet pipelines and the communicating pipelines, and pumps are arranged in all the liquid inlet pipelines.
Description
Technical Field
The invention relates to the technical field of flow batteries, in particular to a testing device and method for evaluating electrolyte of a vanadium battery.
Background
The all-vanadium redox flow battery is a core component of an energy storage system, is a carrier for converting electric energy and chemical energy in the energy storage system, and mainly comprises a pile, electrolyte, a pipeline and an auxiliary sensor. The vanadium redox flow battery is characterized in that vanadium ion solutions with different valence states are respectively used as active substances of a positive electrode and a negative electrode and are respectively stored in respective electrolyte storage tanks. When the battery is charged and discharged, the electrolyte respectively circularly flows through the positive electrode chamber and the negative electrode chamber of the battery by an external liquid storage tank under the action of a pump, and oxidation and reduction reactions occur on the surface of the electrode to complete the charging and discharging of the battery. The all-vanadium redox flow battery has the advantages of good safety, long cycle life and the like, can be used as a supplement of a power grid pumped storage peak regulation device, and has wide application prospects in the fields of new energy access, smart power grid construction and the like.
As a carrier for storing and transmitting electric energy, the state and performance of the electrolyte of the vanadium battery have important influence on the overall efficiency of the vanadium battery, and the electrolyte has low or high temperature, unbalanced valence state, excessive impurity element content and the like, which can lead to the performance reduction of the electrolyte and reduce the charge and discharge capacity and the overall efficiency of the vanadium battery. Therefore, in the actual operation process of the vanadium battery, indexes such as the temperature, valence state and content of each element of the electrolyte are necessarily monitored and timely fed back, so that the evaluation and test efficiency of the electrolyte is improved.
Chinese patent document CN103267780a discloses a thermostat for electrolyte tests. The device is used for providing constant temperature conditions for physical property parameters of electrolyte and other application tests, and can provide a test means for accurately measuring the influence of temperature on the physical property parameters of the electrolyte and the like, thereby providing data basis for optimal selection of materials such as the electrolyte in cell design under different use environments, but only can examine the single index of temperature and cannot evaluate other parameters of the electrolyte.
Chinese patent document CN209372784U discloses a lithium battery electrolyte flame retardant property testing device, through setting up multiunit test post and a plurality of cell room that is used for holding different electrolytes, then soak and fully adsorb electrolyte in different electrolytes through a plurality of test posts, pilot the test post that adsorbs the electrolyte, through the combustion conditions such as the combustion time and flame transmission speed of contrast observation individual test post, the advantage of the flame retardant property of each electrolyte that can be qualitative is compared. However, the device tests the flame retardant property of the lithium battery electrolyte and lacks a testing means for the vanadium battery electrolyte.
Disclosure of Invention
The invention aims to provide a testing device and a testing method for evaluating the electrolyte of the vanadium battery, which can be used for independently testing and evaluating the temperature, the valence state of vanadium ions and elements contained in the electrolyte of the vanadium battery and simultaneously testing and evaluating the indexes, and has the advantages of good practicability, simplicity in operation, environment-friendly and pollution-free operation process and improvement of the evaluation and test efficiency of the electrolyte.
The invention provides a testing device for evaluating electrolyte of a vanadium battery, which comprises an electrolyte temperature testing device, a vanadium ion valence state capacity testing device and an element qualitative and quantitative analysis device, wherein the testing cavities of the electrolyte temperature testing device, the vanadium ion valence state capacity testing device and the element qualitative and quantitative analysis device are respectively provided with a liquid inlet pipeline and a liquid outlet pipeline, the testing cavities of the electrolyte temperature testing device and the testing cavities of the vanadium ion valence state capacity testing device are communicated through communication pipelines, the testing cavities of the vanadium ion valence state capacity testing device and the testing cavities of the element qualitative and quantitative analysis device are communicated through communication pipelines, valves are arranged in all the liquid inlet pipelines, the liquid outlet pipelines and the communication pipelines, and pumps are arranged in all the liquid inlet pipelines.
The invention has the beneficial effects that:
The invention can test the temperature of the electrolyte of the vanadium battery, the valence state of the vanadium ions and the elements contained in the electrolyte independently, and can test the indexes at the same time, thereby having better practicability and simple operation. Meanwhile, the equipment composition principle is simple, and the popularization is convenient. The testing device has no chemical reagent generation and addition in the operation and testing process, no pollutant generation, environment-friendly and pollution-free operation process, can perform three tests of electrolyte temperature, vanadium ion valence state and electrolyte element at one time, and improves the testing efficiency compared with the single-function test.
Drawings
FIG. 1 is a structural entity diagram of the present invention;
Wherein, 1-electrolyte temperature testing device, 2-vanadium ion valence state capacity testing device, 3-element qualitative and quantitative analysis device, 4-liquid inlet pipeline, 5-liquid outlet pipeline, 6-communication pipeline, 7-valve, 8-pump, 9-bypass pipeline.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
the test device for evaluating the electrolyte of the vanadium battery shown in fig. 1 comprises an electrolyte temperature test device 1, a vanadium ion valence state capacity test device 2 and an element qualitative and quantitative analysis device 3, wherein the test cavities of the electrolyte temperature test device 1, the vanadium ion valence state capacity test device 2 and the element qualitative and quantitative analysis device 3 are respectively provided with a liquid inlet pipeline 4 and a liquid outlet pipeline 5, the test cavity of the electrolyte temperature test device 1 is communicated with the test cavity of the vanadium ion valence state capacity test device 2 through a communication pipeline 6, the test cavity of the vanadium ion valence state capacity test device 2 is communicated with the test cavity of the element qualitative and quantitative analysis device 3 through the communication pipeline 6, valves 7 are arranged in all the liquid inlet pipelines 4, the liquid outlet pipelines 5 and the communication pipeline 6, and pumps 8 are arranged in all the liquid inlet pipelines 4. Pumps 8 in the respective feed lines 4 are used for pumping and pushing the electrolyte. The pump 8 pumps and conveys the electrolyte through a pipeline, and the valve 7 is arranged to facilitate the test of controlling single index and multiple indexes.
In the above technical scheme, the test cavity of the element qualitative and quantitative analysis device 3 is also provided with a bypass pipeline 9, and a valve 7 is arranged in the bypass pipeline 9.
In the above technical scheme, the electrolyte temperature testing device 1 is used for testing the electrolyte temperature of the vanadium battery electrolyte, and the electrolyte temperature testing device 1 adopts a temperature sensor to test the electrolyte temperature of the vanadium battery.
In the above technical scheme, the vanadium ion valence state capacity testing device 2 is used for testing the concentration of 2-valence, 3-valence, 4-valence and 5-valence vanadium ions and the total concentration of the electrolyte of the vanadium battery. The vanadium ion valence state capacity testing device 2 is used for testing the valence state capacity of vanadium ions, adopts the principle of an automatic potentiometric titrator, uses a saturated potassium chloride electrode and a platinum electrode as reference electrodes, uses ammonium bisulfate as a titration solution, changes the valence state along with the addition of the ammonium bisulfate to generate potential change, monitors the titration endpoint potential, and finally converts the ion concentration and the valence state.
In the above technical scheme, the qualitative and quantitative element analysis device 3 is used for performing qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, so as to determine the element types and the content of each element in the vanadium battery electrolyte. The element qualitative and quantitative analysis device 3 is based on the principle and structure of an inductively coupled plasma spectrometer (ICP), and the principle and method are as follows: the ICP is used as a central part, a plurality of detection units (each element is matched with one detection unit) are arranged around the ICP, a multi-element analysis system is formed, the ICP is used as an atomizer, the atomizer has the greatest advantage that the atomizer has high temperature, a plurality of elements can be well atomized, the scattering problem is overcome, the LED is controlled by a computer, a lamp power supply sequentially supplies power (2,000 times/second) to a hollow cathode lamp of each detection unit, generated fluorescence is detected by a corresponding photomultiplier, and an electric signal after photoelectric conversion is processed by the computer after being amplified, and the analysis result of each element is reported.
In the above technical scheme, the liquid inlet pipe 4, the liquid outlet pipe 5, the communicating pipe 6 and the bypass pipe 9 are made of polymer acid and alkali resistant materials. For example, the material can be polyethylene, polypropylene, polyvinyl chloride or polytetrafluoroethylene, and has the advantages of high strength, acid and alkali resistance and corrosion resistance.
The vanadium battery electrolyte evaluation test method based on the device comprises the steps of sequentially testing the temperature of the electrolyte, the valence state capacity of vanadium ions of the electrolyte and elements contained in the electrolyte; separately testing the temperature of the electrolyte; the valence state capacity of vanadium ions of the electrolyte is tested independently; testing the elements contained in the electrolyte independently;
When the electrolyte temperature, the vanadium ion valence state capacity of the electrolyte and the elements contained in the electrolyte are tested in sequence, firstly, a communicating pipeline 6 between a test cavity of the electrolyte temperature testing device 1 and a test cavity of the vanadium ion valence state capacity testing device 2 is closed, a communicating pipeline 6 between the test cavity of the vanadium ion valence state capacity testing device 2 and a test cavity of the element qualitative and quantitative analysis device 3 is closed, liquid inlet pipelines 4 of the vanadium ion valence state capacity testing device 2 and the element qualitative and quantitative analysis device 3 are closed, liquid outlet pipelines 5 of the electrolyte temperature testing device 1, the vanadium ion valence state capacity testing device 2 and the element qualitative and quantitative analysis device 3 are closed, then a valve 7 in the liquid inlet pipeline 4 of the electrolyte temperature testing device 1 is opened, a pump 8 of the liquid inlet pipeline 4 of the electrolyte temperature testing device 1 pushes vanadium battery electrolyte in a pipeline to flow, the vanadium battery electrolyte flows into the electrolyte temperature testing device 1, the electrolyte temperature testing device 1 tests the electrolyte temperature of the vanadium battery electrolyte, after the electrolyte temperature testing is completed, a communicating pipeline 6 between a testing cavity of the electrolyte temperature testing device 1 and a testing cavity of the vanadium ion valence state capacity testing device 2 is opened, the vanadium battery electrolyte flows into the vanadium ion valence state capacity testing device 2, the vanadium ion valence state capacity testing device 2 tests the vanadium battery electrolyte by 2-valence, 3-valence, 4-valence and 5-valence vanadium ion concentration and the total concentration of the electrolyte, after the vanadium ion concentration and the total concentration of the electrolyte are tested, a communicating pipeline 6 between the testing cavity of the vanadium ion valence state capacity testing device 2 and the testing cavity of the element qualitative and quantitative analysis device 3 is opened, the vanadium battery electrolyte flows into the element qualitative and quantitative analysis device 3, the element qualitative and quantitative analysis device 3 performs qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, so that the element types and the content of each element in the vanadium battery electrolyte are determined, after the element qualitative and quantitative analysis is completed, a bypass pipeline 9 is opened, and the vanadium battery electrolyte flows out of the bypass pipeline 9;
When the electrolyte temperature is tested independently, the liquid inlet pipeline 4 of the electrolyte temperature testing device 1 is opened, the liquid outlet pipeline 5 of the electrolyte temperature testing device 1 is closed, the communicating pipeline 6 between the testing cavity of the electrolyte temperature testing device 1 and the testing cavity of the vanadium ion valence state capacity testing device 2 is closed, the vanadium battery electrolyte in the pushing pipeline of the pump 8 of the liquid inlet pipeline 4 of the electrolyte temperature testing device 1 flows, the vanadium battery electrolyte flows into the electrolyte temperature testing device 1, the electrolyte temperature testing device 1 performs electrolyte temperature test on the vanadium battery electrolyte, and after the electrolyte temperature test is completed, the liquid outlet pipeline 5 of the electrolyte temperature testing device 1 is opened to discharge the vanadium battery electrolyte;
When the vanadium ion valence state capacity of the electrolyte is tested independently, a communicating pipeline 6 between a testing cavity of the electrolyte temperature testing device 1 and a testing cavity of the vanadium ion valence state capacity testing device 2 is closed, a communicating pipeline 6 between the testing cavity of the vanadium ion valence state capacity testing device 2 and a testing cavity of the element qualitative and quantitative analysis device 3 is closed, a liquid outlet pipeline 5 of the vanadium ion valence state capacity testing device 2 is closed, a liquid inlet pipeline 4 of the vanadium ion valence state capacity testing device 2 is opened, the vanadium battery electrolyte in a pushing pipeline of a pump 8 of the liquid inlet pipeline 4 of the vanadium ion valence state capacity testing device 2 flows, the vanadium battery electrolyte flows into the vanadium ion valence state capacity testing device 2, the vanadium ion valence state capacity testing device 2 tests the vanadium battery electrolyte for the concentration of 2 valence, the concentration of 3 valence, the concentration of 4 valence and the total concentration of the electrolyte, and after the vanadium ion concentration and the total concentration of the electrolyte are tested, the liquid outlet pipeline 5 of the vanadium ion valence state capacity testing device 2 is opened, and the vanadium battery electrolyte is discharged;
When the elements contained in the electrolyte are tested independently, a communicating pipeline 6 between a testing cavity of the vanadium ion valence state capacity testing device 2 and a testing cavity of the element qualitative and quantitative analysis device 3 is closed, a bypass pipeline 9 of the element qualitative and quantitative analysis device 3 is closed, a liquid outlet pipeline 5 of the element qualitative and quantitative analysis device 3 is closed, a liquid inlet pipeline 4 of the element qualitative and quantitative analysis device 3 is opened, the vanadium battery electrolyte in the liquid inlet pipeline 4 of the element qualitative and quantitative analysis device 3 is pushed to flow, the vanadium battery electrolyte flows into the element qualitative and quantitative analysis device 3, the element qualitative and quantitative analysis device 3 performs qualitative and quantitative analysis on the elements contained in the vanadium battery electrolyte, so that the element types and the content of each element in the vanadium battery electrolyte are determined, after the element qualitative and quantitative analysis is completed, the liquid outlet pipeline 5 of the element qualitative and quantitative analysis device 3 is opened, and the vanadium battery electrolyte flows out from the liquid outlet pipeline 5 of the element qualitative and quantitative analysis device 3.
In the above technical scheme, the specific method for the electrolyte temperature test device 1 to test the electrolyte temperature of the vanadium battery electrolyte is as follows: the electrolyte temperature testing device 1 adopts a temperature sensor to test the electrolyte temperature of the vanadium battery.
In the above technical scheme, the specific method for testing the vanadium ion valence state capacity testing device 2 for testing the vanadium ion concentration of 2 valence, 3 valence, 4 valence and 5 valence vanadium ions and the total concentration of the electrolyte is as follows: the vanadium ion valence state capacity testing device 2 is used for testing the valence state capacity of vanadium ions, adopts the principle of an automatic potentiometric titrator, uses a saturated potassium chloride electrode and a platinum electrode as reference electrodes, uses ammonium bisulfate as a titration solution, changes the valence state along with the addition of the ammonium bisulfate to generate potential change, monitors the titration endpoint potential, and finally converts the ion concentration and the valence state.
In the above technical scheme, the element qualitative and quantitative analysis device 3 performs qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, so as to determine the element types and the content of each element in the vanadium battery electrolyte, and the specific method is as follows: the element qualitative and quantitative analysis device 3 is based on the principle and structure of an inductively coupled plasma spectrometer (ICP), and the principle and method are as follows: the ICP is used as a central part, a plurality of detection units (each element is matched with one detection unit) are arranged around the ICP, a multi-element analysis system is formed, the ICP is used as an atomizer, the atomizer has the greatest advantage that the atomizer has high temperature, a plurality of elements can be well atomized, the scattering problem is overcome, the LED is controlled by a computer, a lamp power supply sequentially supplies power (2,000 times/second) to a hollow cathode lamp of each detection unit, generated fluorescence is detected by a corresponding photomultiplier, and an electric signal after photoelectric conversion is processed by the computer after being amplified, and the analysis result of each element is reported.
In the actual operation process of the vanadium battery, the temperature, valence state and content of each element of the electrolyte are monitored and fed back in time, so that the method is used for evaluating the electrolyte.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (9)
1. A vanadium battery electrolyte evaluation test method based on a vanadium battery electrolyte evaluation test device is characterized by comprising the following steps of: the vanadium battery electrolyte evaluation testing device comprises an electrolyte temperature testing device (1), a vanadium ion valence state capacity testing device (2) and an element qualitative and quantitative analysis device (3), wherein the testing cavities of the electrolyte temperature testing device (1), the vanadium ion valence state capacity testing device (2) and the element qualitative and quantitative analysis device (3) are respectively provided with a liquid inlet pipeline (4) and a liquid outlet pipeline (5), the testing cavities of the electrolyte temperature testing device (1) and the testing cavities of the vanadium ion valence state capacity testing device (2) are communicated through a communication pipeline (6), the testing cavities of the vanadium ion valence state capacity testing device (2) and the testing cavities of the element qualitative and quantitative analysis device (3) are communicated through the communication pipeline (6), valves (7) are respectively arranged in all the liquid inlet pipelines (4), the liquid outlet pipelines (5) and the communication pipelines (6), and pumps (8) are respectively arranged in all the liquid inlet pipelines (4);
the vanadium battery electrolyte evaluation test method comprises the steps of sequentially testing the temperature of the electrolyte, the valence state capacity of vanadium ions of the electrolyte and the elements contained in the electrolyte; separately testing the temperature of the electrolyte; the valence state capacity of vanadium ions of the electrolyte is tested independently; testing the elements contained in the electrolyte independently;
When the electrolyte temperature, the valence state capacity of the electrolyte vanadium ions and the elements contained in the electrolyte are sequentially tested, firstly, a communicating pipe (6) between a test cavity of the electrolyte temperature test device (1) and a test cavity of the vanadium ion valence state capacity test device (2) is closed, a communicating pipe (6) between the test cavity of the vanadium ion valence state capacity test device (2) and a test cavity of the element qualitative and quantitative analysis device (3) is closed, a liquid inlet pipe (4) of the vanadium ion valence state capacity test device (2) and the element qualitative and quantitative analysis device (3) is closed, a liquid outlet pipe (5) of the electrolyte temperature test device (1), the vanadium ion valence state capacity test device (2) and the element qualitative and quantitative analysis device (3) is closed, then a valve (7) in the liquid inlet pipe (4) of the electrolyte temperature test device (1) is opened, the vanadium battery electrolyte in a pump (8) of the liquid inlet pipe (4) of the electrolyte temperature test device (1) pushes the liquid inlet pipe to flow, the vanadium battery electrolyte flows into the electrolyte temperature test device (1), the electrolyte temperature test device (1) of the vanadium ion valence state capacity test device (1) and the liquid outlet pipe (6) of the electrolyte in the liquid inlet pipe (4) are pushed, the electrolyte temperature test device is opened after the electrolyte temperature test device (1) and the electrolyte temperature test device (1) has been opened, the vanadium battery electrolyte flows into a vanadium ion valence state capacity testing device (2), the vanadium ion valence state capacity testing device (2) tests the vanadium ion concentration and the total concentration of the electrolyte in 2 valence, 3 valence, 4 valence and 5 valence, after the vanadium ion concentration and the total concentration of the electrolyte are tested, a communicating pipeline (6) between a testing cavity of the vanadium ion valence state capacity testing device (2) and a testing cavity of an element qualitative and quantitative analysis device (3) is opened, the vanadium battery electrolyte flows into the element qualitative and quantitative analysis device (3), the element qualitative and quantitative analysis device (3) performs qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, so that the element types and the content of each element in the vanadium battery electrolyte are determined, after the element qualitative and quantitative analysis is completed, a bypass pipeline (9) is opened, and the vanadium battery electrolyte flows out of the bypass pipeline (9);
When the electrolyte temperature is tested independently, a liquid inlet pipeline (4) of the electrolyte temperature testing device (1) is opened, a liquid outlet pipeline (5) of the electrolyte temperature testing device (1) is closed, a communicating pipeline (6) between a testing cavity of the electrolyte temperature testing device (1) and a testing cavity of the vanadium ion valence state capacity testing device (2) is closed, a pump (8) of the liquid inlet pipeline (4) of the electrolyte temperature testing device (1) pushes vanadium battery electrolyte in the pipeline to flow, the vanadium battery electrolyte flows into the electrolyte temperature testing device (1), the electrolyte temperature testing device (1) tests the electrolyte temperature of the vanadium battery electrolyte, and after the electrolyte temperature testing is completed, the liquid outlet pipeline (5) of the electrolyte temperature testing device (1) is opened to discharge the vanadium battery electrolyte;
When the vanadium ion valence state capacity of the electrolyte is tested independently, a communicating pipeline (6) between a testing cavity of the electrolyte temperature testing device (1) and a testing cavity of the vanadium ion valence state capacity testing device (2) is closed, a communicating pipeline (6) between the testing cavity of the vanadium ion valence state capacity testing device (2) and a testing cavity of the element qualitative and quantitative analysis device (3) is closed, a liquid outlet pipeline (5) of the vanadium ion valence state capacity testing device (2) is closed, a liquid inlet pipeline (4) of the vanadium ion valence state capacity testing device (2) is opened, the vanadium battery electrolyte in a pushing pipeline of a pump (8) of the liquid inlet pipeline (4) of the vanadium ion valence state capacity testing device (2) flows, the vanadium battery electrolyte flows into the vanadium ion valence state capacity testing device (2), the vanadium ion valence state capacity testing device (2) tests the vanadium ion concentration and the total concentration of the electrolyte of the vanadium ion, and the total concentration of the electrolyte of the vanadium ion valence state, and the total concentration of the electrolyte are tested, and after the vanadium ion concentration and the total concentration of the electrolyte are tested, the liquid outlet pipeline (5) of the vanadium ion valence state capacity testing device (2) is opened;
When the elements contained in the electrolyte are tested independently, a communicating pipeline (6) between a testing cavity of the vanadium ion valence state capacity testing device (2) and a testing cavity of the element qualitative and quantitative analysis device (3) is closed, a bypass pipeline (9) of the element qualitative and quantitative analysis device (3) is closed, a liquid outlet pipeline (5) of the element qualitative and quantitative analysis device (3) is closed, a liquid inlet pipeline (4) of the element qualitative and quantitative analysis device (3) is opened, a vanadium battery electrolyte in a pushing pipeline of a pump (8) of the liquid inlet pipeline (4) of the element qualitative and quantitative analysis device (3) flows, the vanadium battery electrolyte flows into the element qualitative and quantitative analysis device (3), the element qualitative and quantitative analysis device (3) performs qualitative and quantitative analysis on the elements contained in the vanadium battery electrolyte, so that the element types and the content of each element in the vanadium battery electrolyte are determined, after the element qualitative and quantitative analysis is completed, the liquid outlet pipeline (5) of the element qualitative and quantitative analysis device (3) is opened, and the vanadium battery electrolyte flows out of the liquid outlet pipeline (5) of the element qualitative and quantitative analysis device (3).
2. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the test cavity of the element qualitative and quantitative analysis device (3) is also provided with a bypass pipeline (9), and a valve (7) is arranged in the bypass pipeline (9).
3. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the electrolyte temperature testing device (1) is used for testing the electrolyte temperature of the vanadium battery electrolyte.
4. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the vanadium ion valence state capacity testing device (2) is used for testing the concentration of 2-valence, 3-valence, 4-valence and 5-valence vanadium ions and the total concentration of the electrolyte of the vanadium battery.
5. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the element qualitative and quantitative analysis device (3) is used for carrying out qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte so as to determine the element types and the content of each element in the vanadium battery electrolyte.
6. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the liquid inlet pipeline (4), the liquid outlet pipeline (5), the communicating pipeline (6) and the bypass pipeline (9) are made of polymer acid and alkali resistant materials.
7. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the specific method for the electrolyte temperature test device (1) to test the electrolyte temperature of the vanadium battery electrolyte comprises the following steps: the electrolyte temperature testing device (1) adopts a temperature sensor to test the electrolyte temperature of the vanadium battery.
8. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the specific method for testing the vanadium ion valence state capacity testing device (2) for testing the concentration of 2-valence, 3-valence, 4-valence and 5-valence vanadium ions and the total concentration of the electrolyte of the vanadium battery comprises the following steps: the vanadium ion valence state capacity testing device (2) is used for testing the valence state capacity of vanadium ions, adopts the principle of an automatic potentiometric titrator, uses a saturated potassium chloride electrode and a platinum electrode as reference electrodes, uses ammonium bisulfate as a titration solution, changes the valence state along with the addition of the ammonium bisulfate to generate potential change, monitors the titration endpoint potential, and finally converts the ion concentration and the valence state.
9. The vanadium redox battery electrolyte evaluation test method according to claim 1, wherein: the element qualitative and quantitative analysis device (3) performs qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, so that the specific method for determining the element types and the content of each element in the vanadium battery electrolyte comprises the following steps: the element qualitative and quantitative analysis device (3) is based on the principle and structure of an inductive coupling plasma spectrum generator, a plurality of detection units are arranged around the inductive coupling plasma spectrum generator, each element is provided with one detection unit, a multi-element analysis system is formed, a lamp power supply sequentially supplies power to the hollow cathode lamp of each detection unit, generated fluorescence is detected by the corresponding photomultiplier, an electric signal after photoelectric conversion is subjected to element analysis processing by a computer, and the analysis result of each element is reported.
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