CN114518429A - Test device and method for vanadium battery electrolyte evaluation - Google Patents
Test device and method for vanadium battery electrolyte evaluation Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 236
- 239000003792 electrolyte Substances 0.000 title claims abstract description 210
- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 95
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 238000011156 evaluation Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 16
- 229910001456 vanadium ion Inorganic materials 0.000 claims abstract description 93
- 238000004451 qualitative analysis Methods 0.000 claims abstract description 60
- 238000004445 quantitative analysis Methods 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 238000004891 communication Methods 0.000 claims description 17
- 238000004458 analytical method Methods 0.000 claims description 9
- 238000009616 inductively coupled plasma Methods 0.000 claims description 8
- 238000010998 test method Methods 0.000 claims description 7
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 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
- 239000000463 material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims 1
- 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
- 238000004146 energy storage Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 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
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- 238000002485 combustion reaction Methods 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
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 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
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- 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
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- H01M8/00—Fuel cells; Manufacture thereof
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Abstract
The invention discloses a testing device for vanadium battery electrolyte evaluation, 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 cavity of the electrolyte temperature testing device is communicated with the testing cavity of the vanadium ion valence state capacity testing device through a communicating pipeline, the testing cavity of the vanadium ion valence state capacity testing device is communicated with the testing cavity of the element qualitative and quantitative analysis device 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 a testing method for vanadium redox batteries electrolyte evaluation.
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 four parts, namely a galvanic pile, electrolyte, a pipeline and an auxiliary sensor. The vanadium ion solution with different valence states is respectively used as active substances of a positive electrode and a negative electrode of the all-vanadium redox flow battery and respectively stored in respective electrolyte storage tanks. When the battery is charged and discharged, the electrolyte respectively circulates through the anode chamber and the cathode chamber of the battery from an external liquid storage tank under the action of a pump, and oxidation and reduction reactions occur on the surface of an electrode to complete 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 pumped storage peak regulation device of a power grid, 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 redox battery have important influence on the overall efficiency of the vanadium redox battery, and the performance of the electrolyte is reduced due to over-low or over-high temperature of the electrolyte, unbalanced valence state of the electrolyte, excessive content of impurity elements in the electrolyte and the like, so that the charge-discharge capacity and the overall efficiency of the vanadium redox battery are reduced. Therefore, in the actual operation process of the vanadium redox battery, the temperature, the valence state, the content of each element and other indexes of the electrolyte need to be monitored and fed back in time, so that the evaluation and test efficiency of the electrolyte is improved.
Chinese patent document CN103267780A discloses a constant temperature device for electrolyte testing. The device comprises a self-made thermostatic bath, a heat-insulating cover plate and an external thermostatic source, and is used for providing thermostatic conditions for physical parameters of electrolyte and other application tests.
Chinese patent document CN209372784U discloses a lithium battery electrolyte flame retardant property testing arrangement, through setting up multiunit test post and a plurality of cell rooms that are used for holding different electrolyte, then soak and fully adsorb electrolyte in the electrolyte of difference through a plurality of test posts, ignite the test post that adsorbs electrolyte, through combustion conditions such as the burning time and the flame transmission speed of contrast observation individual test post, the good and bad of the flame retardant property of each electrolyte of contrast that can be qualitative. But the device tests the flame retardant property of the lithium battery electrolyte, and a test means for the vanadium battery electrolyte is lacked.
Disclosure of Invention
The invention aims to provide a test device and a test method for vanadium battery electrolyte evaluation, which can test and evaluate the temperature of the vanadium battery electrolyte, the valence state of vanadium ions and elements contained in the electrolyte independently, can also test and evaluate the indexes simultaneously, have better practicability and simple operation, are environment-friendly and pollution-free in the operation process, and improve the evaluation test efficiency of the electrolyte.
In order to achieve the purpose, the testing device for vanadium battery electrolyte evaluation comprises an electrolyte temperature testing device, a vanadium ion valence state capacity testing device and an element qualitative and quantitative analysis device, wherein liquid inlet pipelines and liquid outlet pipelines are arranged in testing cavities of the electrolyte temperature testing device, the vanadium ion valence state capacity testing device and the element qualitative and quantitative analysis device, the testing cavity of the electrolyte temperature testing device is communicated with the testing cavity of the vanadium ion valence state capacity testing device through a communicating pipeline, the testing cavity of the vanadium ion valence state capacity testing device is communicated with the testing cavity of the element qualitative and quantitative analysis device 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.
The invention has the beneficial effects that:
the method can test the temperature of the electrolyte of the vanadium redox battery, the valence state of vanadium ions and elements contained in the electrolyte independently, can also test the indexes simultaneously, and has better practicability and simple operation. Meanwhile, the equipment composition principle is simple, and the popularization is convenient. The test device disclosed by the invention has the advantages that no chemical reagent is generated and added in the operation and test processes, no pollutant is generated, the operation process is environment-friendly and pollution-free, the three tests of the temperature of the electrolyte, the valence state of vanadium ions and the element of the electrolyte can be carried out at one time, and the test efficiency is improved compared with the single function test.
Drawings
FIG. 1 is a block diagram of the present invention;
the device comprises 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 and 9-bypass pipeline.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1, the test device for vanadium battery electrolyte evaluation includes an electrolyte temperature test device 1, a vanadium ion valence state capacity test device 2, and an element qualitative and quantitative analysis device 3, where 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 pipe 4 and a liquid outlet pipe 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 pipe 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 a communication pipe 6, all the liquid inlet pipes 4, the liquid outlet pipes 5, and the communication pipes 6 are respectively provided with a valve 7, and all the liquid inlet pipes 4 are respectively provided with a pump 8. A pump 8 in each inlet conduit 4 is used to pump and push the electrolyte. The pump 8 pumps and conveys the electrolyte through a pipeline, and the valve 7 is arranged to facilitate the control of the test of single indexes and multiple indexes.
In the above technical scheme, the test chamber of the qualitative and quantitative elemental analysis device 3 is further provided with a bypass pipeline 9, and a valve 7 is arranged in the bypass pipeline 9.
In the technical scheme, the electrolyte temperature testing module 1 is used for testing the electrolyte temperature of the vanadium redox battery electrolyte, and the electrolyte temperature testing module 1 adopts the temperature sensor to test the electrolyte temperature of the vanadium redox battery.
In the above technical scheme, the vanadium ion valence state capacity testing device 2 is used for testing the concentration of vanadium ions with valence 2, valence 3, valence 4 and valence 5 and the total concentration of the electrolyte in the vanadium battery electrolyte. 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, takes a saturated potassium chloride electrode and a platinum electrode as reference electrodes, takes ammonium bisulfate as a titration solution, and changes the valence state along with the addition of the ammonium bisulfate in the vanadium ion solution, thereby generating the potential change, monitoring the titration end point potential, and finally converting the ion concentration and the valence state.
In the above technical solution, 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 types of elements 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 spectrum generator (ICP), and the principle and method are as follows: the ICP as an atomizer has the greatest advantages that the atomizer has high temperature, various elements can be well atomized, the scattering problem is also overcome, the lamp power supply is controlled by a computer and sequentially supplies power (2,000 times/second) to hollow cathode lamps of the detection units, generated fluorescence is detected by corresponding photomultiplier tubes, electric signals after photoelectric conversion are amplified and processed by the computer, and the analysis results of the elements are reported.
In the technical scheme, the liquid inlet pipeline 4, the liquid outlet pipeline 5, the communication pipeline 6 and the bypass pipeline 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.
A vanadium redox 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 in the electrolyte and elements contained in the electrolyte; independently testing the temperature of the electrolyte; independently testing the valence state capacity of the vanadium ions in the electrolyte; and testing the elements contained in the electrolyte independently;
when the electrolyte temperature, the valence state capacity of vanadium ions in the electrolyte and elements contained in the electrolyte are tested in sequence, firstly, a communication pipeline 6 between a testing cavity of an electrolyte temperature testing device 1 and a testing cavity of a vanadium ion valence state capacity testing device 2 is closed, a communication pipeline 6 between the 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 closed, a liquid inlet pipeline 4 of the vanadium ion valence state capacity testing device 2 and the element qualitative and quantitative analysis device 3 is closed, a liquid outlet pipeline 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 is 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 the vanadium battery electrolyte in the pipeline to flow, the vanadium battery electrolyte flows into an electrolyte temperature testing module 1, the electrolyte temperature testing module 1 tests the electrolyte temperature of the vanadium battery electrolyte, after the electrolyte temperature test is completed, a communicating pipeline 6 between a testing cavity of an electrolyte temperature testing device 1 and a testing cavity of a vanadium ion valence state capacity testing device 2 is 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 battery electrolyte by the concentration of 2-valent vanadium ion, 3-valent vanadium ion, 4-valent vanadium ion and 5-valent vanadium ion and the total concentration of the electrolyte, after the test of the concentration of the vanadium ion and the total concentration of the electrolyte is completed, a communicating pipeline 6 between the 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 an element qualitative and quantitative analysis device 3, and the element qualitative and quantitative analysis device 3 carries out qualitative and quantitative analysis on elements contained in the vanadium battery electrolyte, thereby determining the types of elements and the content of each element in the vanadium battery electrolyte, opening the bypass pipeline 9 after the qualitative and quantitative analysis of the elements is completed, and allowing the vanadium battery electrolyte to flow out of the bypass pipeline 9;
When the temperature of the electrolyte is tested independently, a liquid inlet pipeline 4 of an electrolyte temperature testing module 1 is opened, a liquid outlet pipeline 5 of the electrolyte temperature testing module 1 is closed, a communication pipeline 6 between a testing cavity of the electrolyte temperature testing device 1 and a testing cavity of a 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 module 1, the electrolyte temperature testing module 1 performs electrolyte temperature testing on the vanadium battery electrolyte, and after the electrolyte temperature testing is completed, the liquid outlet pipeline 5 of the electrolyte temperature testing module 1 is opened to discharge the vanadium battery electrolyte;
when the valence state capacity of the vanadium ion in the electrolyte is tested independently, a communication pipeline 6 between a test cavity of an electrolyte temperature test device 1 and a test cavity of a vanadium ion valence state capacity test device 2 is closed, a communication pipeline 6 between the test cavity of the vanadium ion valence state capacity test device 2 and a test cavity of an element qualitative and quantitative analysis device 3 is closed, a liquid outlet pipeline 5 of the vanadium ion valence state capacity test device 2 is closed, a liquid inlet pipeline 4 of the vanadium ion valence state capacity test device 2 is opened, a pump 8 of the liquid inlet pipeline 4 of the vanadium ion valence state capacity test device 2 pushes vanadium battery electrolyte in the pipeline to flow, the vanadium battery electrolyte flows into the vanadium ion valence state capacity test device 2, and the vanadium ion valence state capacity test device 2 tests the vanadium battery electrolyte in the concentration of 2-valent vanadium ion, 3-valent vanadium, 4-valent vanadium and 5-valent vanadium and the total concentration of the electrolyte, after the test of the vanadium ion concentration and the total electrolyte concentration is finished, opening a liquid outlet pipeline 5 of the vanadium ion valence state capacity test device 2 to discharge the vanadium battery electrolyte;
When the elements contained in the electrolyte are tested independently, a communication pipeline 6 between a test cavity of a vanadium ion valence state capacity test device 2 and a test cavity of an 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 pump 8 of the liquid inlet pipeline 4 of the element qualitative and quantitative analysis device 3 pushes the vanadium battery electrolyte in the pipeline to flow, the vanadium battery electrolyte flows into the element qualitative and quantitative analysis device 3, the element qualitative and quantitative analysis device 3 carries out qualitative and quantitative analysis on the 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 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, the vanadium battery electrolyte flows out from a 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 module 1 to test the electrolyte temperature of the vanadium redox battery electrolyte comprises the following steps: the electrolyte temperature testing module 1 adopts a temperature sensor to test the electrolyte temperature of the vanadium redox battery.
In the above technical solution, the specific method for testing the concentration of the vanadium ions with valence 2, 3, 4 and 5 and the total concentration of the electrolyte in the vanadium battery electrolyte by the vanadium ion valence state capacity testing device 2 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, takes a saturated potassium chloride electrode and a platinum electrode as reference electrodes, takes ammonium bisulfate as a titration solution, and changes the valence state along with the addition of the ammonium bisulfate in the vanadium ion solution, thereby generating the potential change, monitoring the titration end point potential, and finally converting the ion concentration and the valence state.
In the above technical scheme, the qualitative and quantitative element analysis device 3 performs qualitative and quantitative analysis on the 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 by the specific method: the element qualitative and quantitative analysis device 3 is based on the principle and the structure of an inductively coupled plasma spectral generator (ICP), and the principle and the method are as follows: the ICP as an atomizer has the greatest advantages that the atomizer has high temperature, various elements can be well atomized, the scattering problem is also overcome, the lamp power supply is controlled by a computer and sequentially supplies power (2,000 times/second) to hollow cathode lamps of the detection units, generated fluorescence is detected by corresponding photomultiplier tubes, electric signals after photoelectric conversion are amplified and processed by the computer, and the analysis results of the elements are reported.
In the actual operation process of the vanadium redox battery, the temperature, the valence state and the content of each element of the electrolyte are monitored and fed back in time for evaluating the electrolyte.
Those not described in detail in this specification are well within the skill of the art.
Claims (10)
1. A testing arrangement for vanadium cell electrolyte aassessment which characterized in that: it 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), electrolyte temperature testing arrangement (1), vanadium ion valence state capacity testing arrangement (2) and the test cavity of element qualitative and quantitative analysis device (3) all are equipped with inlet channel (4) and liquid outlet pipe way (5), communicate through communicating pipe (6) between the test cavity of electrolyte temperature testing arrangement (1) and the test cavity of vanadium ion valence state capacity testing arrangement (2), communicate through communicating pipe (6) between the test cavity of vanadium ion valence state capacity testing arrangement (2) and the test cavity of element qualitative and quantitative analysis device (3), all inlet channel (4), all be equipped with valve (7) in liquid outlet pipe way (5) and communicating pipe way (6), all be equipped with pump (8) in all inlet channel (4).
2. The test device for vanadium battery electrolyte evaluation according to claim 1, characterized in that: 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 test device for vanadium battery electrolyte evaluation according to claim 1, wherein: the electrolyte temperature testing module (1) is used for testing the electrolyte temperature of the vanadium battery electrolyte.
4. The test device for vanadium battery electrolyte evaluation according to claim 1, characterized in that: the vanadium ion valence state capacity testing device (2) is used for testing the concentration of 2-valent, 3-valent, 4-valent and 5-valent vanadium ions in the vanadium battery electrolyte and the total concentration of the electrolyte.
5. The test device for vanadium battery electrolyte evaluation according to claim 1, characterized in that: the element qualitative and quantitative analysis device (3) is used for qualitatively and quantitatively analyzing 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.
6. The test device for vanadium battery electrolyte evaluation according to claim 1, characterized in that: 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 based on the device of claim 1 is characterized in that: the vanadium battery electrolyte evaluation test method comprises the steps of sequentially testing the temperature of an electrolyte, the valence state capacity of vanadium ions of the electrolyte and elements contained in the electrolyte; independently testing the temperature of the electrolyte; independently testing the valence state capacity of the vanadium ions in the electrolyte; and testing the elements contained in the electrolyte independently;
When the electrolyte temperature, the valence state capacity of vanadium ions of the electrolyte and elements contained in the electrolyte are tested in sequence, firstly, a communication pipeline (6) between a test cavity of an electrolyte temperature testing device (1) and a test cavity of a vanadium ion valence state capacity testing device (2) is closed, a communication pipeline (6) between the test cavity of the vanadium ion valence state capacity testing device (2) and the test cavity of an element qualitative and quantitative analysis device (3) is closed, a liquid inlet pipeline (4) of the vanadium ion valence state capacity testing device (2) and the element qualitative and quantitative analysis device (3) is closed, a liquid outlet pipeline (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) is closed, and then a valve (7) in the liquid inlet pipeline (4) of the electrolyte testing device (1) is opened, vanadium battery electrolyte in a pushing pipeline of a pump (8) of a liquid inlet pipeline (4) of an electrolyte temperature testing device (1) flows, the vanadium battery electrolyte flows into an electrolyte temperature testing module (1), the electrolyte temperature testing module (1) tests the electrolyte temperature of the vanadium battery electrolyte, after the electrolyte temperature test is finished, a communicating pipeline (6) between a testing cavity of the electrolyte temperature testing device (1) and a testing cavity of a vanadium ion valence state capacity testing device (2) is 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 battery electrolyte for vanadium ion concentrations of 2 valence, 3 valence, 4 valence and 5 valence and total electrolyte concentrations, and after the vanadium ion concentrations and the total electrolyte concentrations are tested, a communicating pipeline (C) between the testing cavity of the vanadium ion valence state capacity testing device (2) and the testing cavity of an element qualitative and quantitative analysis device (3) is opened 6) The vanadium battery electrolyte flows into the element qualitative and quantitative analysis device (3), the element qualitative and quantitative analysis device (3) carries 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, after the element qualitative and quantitative analysis is finished, the 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 an electrolyte temperature testing module (1) is opened, a liquid outlet pipeline (5) of the electrolyte temperature testing module (1) is closed, a communication pipeline (6) between a testing cavity of the electrolyte temperature testing device (1) and a testing cavity of a vanadium ion valence state capacity testing device (2) is closed, vanadium battery electrolyte in a pushing pipeline of a 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 module (1), the electrolyte temperature testing module (1) carries out electrolyte temperature testing on the vanadium battery electrolyte, and after the electrolyte temperature testing is finished, the liquid outlet pipeline (5) of the electrolyte temperature testing module (1) is opened to discharge the vanadium battery electrolyte;
when the valence state capacity of the vanadium ion electrolyte is separately tested, a communication pipeline (6) between a test cavity of an electrolyte temperature testing device (1) and the test cavity of a vanadium ion valence state capacity testing device (2) is closed, the communication pipeline (6) between the test cavity of the vanadium ion valence state capacity testing device (2) and the test cavity of an 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, a pump (8) of the liquid inlet pipeline (4) of the vanadium ion valence state capacity testing device (2) pushes the vanadium battery electrolyte in a pipeline to flow, the vanadium battery electrolyte flows into the vanadium ion valence state capacity testing device (2), and the vanadium ion valence state capacity testing device (2) performs valence state 2 on the vanadium battery electrolyte, Testing the vanadium ion concentration of 3, 4 and 5 and the total concentration of the electrolyte, and opening a liquid outlet pipeline (5) of the vanadium ion valence state capacity testing device (2) to discharge the vanadium battery electrolyte after the vanadium ion concentration and the total concentration of the electrolyte are tested;
When the elements contained in the electrolyte are tested independently, a communication pipeline (6) between a test cavity of a vanadium ion valence state capacity test device (2) and the test cavity of an 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, 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 into the element qualitative and quantitative analysis device (3), the elements contained in the vanadium battery electrolyte are subjected to qualitative and quantitative analysis by the element qualitative and quantitative analysis device (3), and therefore the element types and the content of each element in the vanadium battery electrolyte are determined, after the qualitative and quantitative analysis of the elements is completed, a liquid outlet pipeline (5) of the qualitative and quantitative element analysis device (3) is opened, and the vanadium battery electrolyte flows out from the liquid outlet pipeline (5) of the qualitative and quantitative element analysis device (3).
8. The vanadium battery electrolyte evaluation test method of claim 7, wherein: the electrolyte temperature test module (1) specifically tests the electrolyte temperature of the vanadium battery electrolyte by the following method: the electrolyte temperature testing module (1) adopts a temperature sensor to test the electrolyte temperature of the vanadium battery.
9. The vanadium battery electrolyte evaluation test method of claim 7, wherein: the specific method for testing the vanadium ion valence state capacity testing device (2) for testing the vanadium ion concentration of the vanadium battery electrolyte at valence 2, valence 3, valence 4 and valence 5 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, takes a saturated potassium chloride electrode and a platinum electrode as reference electrodes, takes ammonium bisulfate as a titration solution, and changes the valence state along with the addition of the ammonium bisulfate in the vanadium ion solution, thereby generating the potential change, monitoring the titration end point potential, and finally converting the ion concentration and the valence state.
10. The vanadium battery electrolyte evaluation test method of claim 7, wherein: the element qualitative and quantitative analysis device (3) carries out 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 inductively coupled plasma spectrum generator, a plurality of detection units are arranged around the inductively coupled plasma spectrum generator, each element is provided with one detection unit to form a multi-element analysis system, a lamp power supply sequentially supplies power to hollow cathode lamps of each detection unit, generated fluorescence is detected by corresponding photomultiplier tubes, electric signals after photoelectric conversion are subjected to element analysis processing by a computer, and analysis results of each element are reported.
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