CN101464498B - Three-electrode simulation battery equipment used for lithium ion battery - Google Patents
Three-electrode simulation battery equipment used for lithium ion battery Download PDFInfo
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- CN101464498B CN101464498B CN2008101909247A CN200810190924A CN101464498B CN 101464498 B CN101464498 B CN 101464498B CN 2008101909247 A CN2008101909247 A CN 2008101909247A CN 200810190924 A CN200810190924 A CN 200810190924A CN 101464498 B CN101464498 B CN 101464498B
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Abstract
The invention relates to an analogous battery device for a three-electrode system for a lithium ion battery. The analogous battery device comprises two main parts, namely a cylindrical accommodating cavity and a cylindrical piston. A working electrode post and a reference electrode post are communicated to the bottom part of the cylindrical accommodating cavity; the ends of the working electrode post and the reference electrode post extend to outside and can be directly connected with an external circuit through a clamp; a counter electrode post made of stainless steel materials is communicated inside the cylindrical piston and is inserted and communicated with the upper cylindrical surface and the lower cylindrical surface of the cylindrical piston; one end of the counter electrode post and the bottom surface of the inner cavity of the cylindrical piston are kept in one plane, and the other end of the counter electrode post extends to the outer part of the cylindrical piston and can be directly connected with the external circuit through the clamp. The invention has the advantages of simple operation and excellent repetitive operation and result reproducibility, and can more accurately measure the electrochemical parameters of counter electrode systems.
Description
Technical field
The invention belongs to the lithium ion battery field, relate to lithium ion battery three-electrode system simulated battery device.
Technical background
In recent years, flourish along with portable electric appts, electric automobile, particularly the demand of high-performance portable power source is also more and more urgent to portable power source.The development and utilization of power-supply system has become one of gordian technique that realizes that bottleneck is broken through in these fields.Compare with secondary cells such as other traditional ni-mhs, nickel chromium triangles, lithium ion battery has the high-end energy storage alternative system that advantages such as operating voltage height, energy density height, good cycle become portable terminal.At present, the raising of lithium ion battery performance depends on the raising of battery manufacturing process, the exploitation and the improvement of new electrode material.Wherein, the test and evaluation to the chemical property of new electrode material, battery system is the important step that present lithium ion battery further improves performance, undergoes technological transformation.Usually, at present to the preliminary assessment of new material system mainly based on the simulated battery of two electrodes.This two electrode systems are for the intrinsic electrochemical process existence deviation more or less of exact evaluation battery electrode system, particularly for the relatively more responsive class electro-chemical test of microelectrode parameter error, as linear sweep, AC impedance, leakage current test etc.Therefore, how simply and effectively to obtain the intrinsic chemical property of this class electrode material, the further adjustment and the improvement of electrode material had material impact.Accurately measure the parameter of electrochemical reaction process, generally adopt three-electrode system.And the specific sensibility to water and oxidizing atmosphere of lithium-ion battery system has determined it can't adopt common three-electrode system, and needs to adopt water-tight, the gastight three-electrode system of all-sealed structure.Determine simply and effectively the locus of three electrodes and realize on this basis water-tight, gastight, realize making things convenient under the normal atmospheric environment test purpose to become the several of paramount importance key element of three electrode assemblies design.The lithium ion battery contrast electrode generally adopts the lithium sheet, this special contrast electrode has also determined in the lithium ion battery three-electrode system the shape of contrast electrode and the position can be adopted more flexibly but also more careful mode is settled, and makes contrast electrode less to the influence of the Electric Field Distribution of working electrode.
Summary of the invention
The object of the present invention is to provide and a kind ofly locate simple working electrode, contrast electrode, the relative position of electrode is fixed, structurally realizes to satisfy the lithium ion battery three-electrode system simulated battery device of sealing (no leakage, air tight) each parameter in the electrochemical process is realized the accurately purpose of test.This device uses very simple, working electrode, electrode, contrast electrode relative position is fixed, and sizing method that need not be numerous and diverse can realize working electrode and to the tight encapsulation between the electrode.
The present invention is achieved through the following technical solutions: lithium ion battery three-electrode system simulated battery device, comprise 2 two main parts of cylindrical ccontaining cavity 1 and cylindrical piston, cylindrical ccontaining cavity 1 is a right cylinder, be the cylindrical cavity structure of end sealing, be through with working electrode pole 3 and contrast electrode pole 4 in the bottom of cylindrical ccontaining cavity 1; The end face of working electrode pole 3 one ends and the internal cavities of cylindrical ccontaining cavity 1 bottom are in one plane, one end of contrast electrode pole 4 extends to the internal cavities of cylindrical ccontaining cavity 1, but a little less than the bottom surface of the internal cavities of cylindrical ccontaining cavity 1, to reserve the position of contrast electrode lithium sheet; The other end of working electrode pole 3 and contrast electrode pole 4 then all extends to cylindrical ccontaining cavity 1 outside, can directly link to each other by anchor clamps with external circuit, realizes current path; Have the passage 5 of electrolytic solution on the sidewall of cylindrical ccontaining cavity 1, the passage 5 of electrolytic solution directly connects with the inner chamber of cylindrical ccontaining cavity 1.The passage 5 of electrolytic solution is in when work, by one with wall can close contact electrolyte passage piston 6 cover, intercept the air in the external world, cylindrical piston 2 is a right cylinder piston, is entity structure; Can insert in the cavity of cylindrical ccontaining cavity 1, and realize closely contacting, reach air tight, without leakage effect with the cavity inner wall of cylindrical ccontaining cavity 1; The internal run-through of cylindrical piston 2 have a stainless steel to electrode pole 7, electrode pole 7 is embedded and through the last face of cylinder and the following face of cylinder of cylindrical piston 2, one end of electrode pole 7 and the internal cavity bottom surface of cylindrical piston 2 are kept in one plane, the other end then extends to the outside of cylindrical piston 2, can directly link to each other by anchor clamps, realize current path with external circuit.For guaranteeing sealing effectiveness, be equipped with O-ring seal 8 on the cylinder of cylindrical piston 2.To reach between cylindrical ccontaining cavity 1 and the cylindrical piston 2 double action of sealing and fixed position.Described cylindrical ccontaining cavity 1 and cylindrical piston 2 materials are teflon.The part of imbedding in the teflon is cylindrical, and this material has good corrosion resisting property to the lithium-ion electrolyte system.Working electrode pole 3 and electrode pole 7 all kept level with the inner bottom surface of the ccontaining cavity at place at the cylinder of electric core perform region one side.The maintenance of pole piece in this perform region of packing into the assurance different size is smooth, and realizes good electrical contact with pole.Working electrode pole 3, contrast electrode pole 4 and electrode pole 7 are stainless steel.Contrast electrode pole 4 is lower than 0.7 millimeter of ccontaining cavity inner bottom surface at the cylinder of electric core perform region one side.Contrast electrode is the lithium sheet of 0.2 millimeters thick, and with contrast electrode pole 4 equal diameters.
The invention has the beneficial effects as follows, operate very simple, electrode, working electrode, contrast electrode are all had relatively-stationary locus, have good repetitive operation and result's reproducibility, can realize electrode system is carried out the mensuration of comparatively accurate electrochemical parameter.Seal Design in the form of piston is applicable to the electro-chemical test of various pole piece thickness.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a section assembling synoptic diagram of the present invention
Fig. 2 is a Knock-Down Component synoptic diagram of the present invention
Among the figure: 1, cylindrical ccontaining cavity, 2, cylindrical piston, 3, the working electrode pole, 4, the contrast electrode pole, 5, electrolyte passage, 6, the piston of electrolyte passage, 7, to the electrode pole, 8, O-ring seal.Body, 2, composite negative pole material, 3, lug, 4, composite negative pole material strengthens body, 5, the composite negative pole material matrix.
Embodiment
Lithium ion battery of the present invention three-electrode system simulated battery device, comprise 2 two main parts of cylindrical ccontaining cavity 1 and cylindrical piston, cylindrical ccontaining cavity 1 is a right cylinder, be the cylindrical cavity structure of end sealing, be through with working electrode pole 3 and contrast electrode pole 4 in the bottom of cylindrical ccontaining cavity 1; The end face of working electrode pole 3 one ends and the internal cavities of cylindrical ccontaining cavity 1 bottom are in one plane, one end of contrast electrode pole 4 extends to the internal cavities of cylindrical ccontaining cavity 1, but a little less than the bottom surface of the internal cavities of cylindrical ccontaining cavity 1, to reserve the position of contrast electrode lithium sheet; The other end of working electrode pole 3 and contrast electrode pole 4 then all extends to cylindrical ccontaining cavity 1 outside, can directly link to each other by anchor clamps with external circuit, realizes current path; Have the passage 5 of electrolytic solution on the sidewall of cylindrical ccontaining cavity 1, the passage 5 of electrolytic solution directly connects with the inner chamber of cylindrical ccontaining cavity 1, the passage 5 of electrolytic solution is when work, by one with wall can close contact electrolyte passage piston 6 cover, intercept extraneous air, cylindrical piston 2 is a right cylinder piston, is entity structure; Can insert in the cavity of cylindrical ccontaining cavity 1, and realize closely contacting, reach air tight, without leakage effect with the cavity inner wall of cylindrical ccontaining cavity 1; The internal run-through of cylindrical piston 2 have a stainless steel to electrode pole 7, electrode pole 7 is embedded and through the last face of cylinder and the following face of cylinder of cylindrical piston 2, one end of electrode pole 7 and the internal cavity bottom surface of cylindrical piston 2 are kept in one plane, the other end then extends to the outside of cylindrical piston 2, can directly link to each other by anchor clamps, realize current path with external circuit.For guaranteeing sealing effectiveness, be equipped with O-ring seal 8 on the cylinder of cylindrical piston 2.To reach between cylindrical ccontaining cavity 1 and the cylindrical piston 2 double action of sealing and fixed position.Described cylindrical ccontaining cavity 1 and cylindrical piston 2 materials are teflon.The part of imbedding in the teflon is cylindrical, and this material has good corrosion resisting property to the lithium-ion electrolyte system.Working electrode pole 3 and electrode pole 7 all kept level with the inner bottom surface of the ccontaining cavity at place at the cylinder of electric core perform region one side.The maintenance of pole piece in this perform region of packing into the assurance different size is smooth, and realizes good electrical contact with pole.Working electrode pole 3, contrast electrode pole 4 and electrode pole 7 are stainless steel.Contrast electrode is the lithium sheet of 0.2 millimeters thick, and with contrast electrode pole 4 equal diameters.Need to place a slice barrier film between this contrast electrode and the working electrode to guarantee electrical isolation between the two.
Claims (5)
1. lithium ion battery is with three-electrode system simulated battery device, it is characterized in that, comprise (2) two main parts of cylindrical ccontaining cavity (1) and cylindrical piston, cylindrical ccontaining cavity (1) is a right cylinder, be the cylindrical cavity structure of end sealing, be through with working electrode pole (3) and contrast electrode pole (4) in the bottom of cylindrical ccontaining cavity (1); The internal cavities bottom of the end face of working electrode pole (3) one ends and cylindrical ccontaining cavity (1) in one plane, one end of contrast electrode pole (4) extends to the internal cavities of cylindrical ccontaining cavity (1), but a little less than the bottom surface of the internal cavities of cylindrical ccontaining cavity (1), to reserve the position of contrast electrode lithium sheet; The other end of working electrode pole (3) and contrast electrode pole (4) then all extends to cylindrical ccontaining cavity (1) outside, can directly link to each other by anchor clamps with external circuit, realizes current path; Have the passage (5) of electrolytic solution on the sidewall of cylindrical ccontaining cavity (1), the passage of electrolytic solution (5) directly connects with the inner chamber of cylindrical ccontaining cavity (1), the passage of electrolytic solution (5) is when work, by one with wall can close contact electrolyte passage piston (6) cover, cylindrical piston (2) is a right cylinder piston, is entity structure; Can insert in the cavity of cylindrical ccontaining cavity (1), and realize closely contacting with the cavity inner wall of cylindrical ccontaining cavity (1); The internal run-through of cylindrical piston (2) have a stainless steel to electrode pole (7), electrode pole (7) is embedded and through the last face of cylinder and the following face of cylinder of cylindrical piston (2), one end of electrode pole (7) and the internal cavity bottom surface of cylindrical piston (2) are kept in one plane, the other end then extends to the outside of cylindrical piston (2), can directly link to each other by anchor clamps, realize current path with external circuit; Be equipped with O-ring seal (8) on the cylinder of cylindrical piston (2).
2. lithium ion battery according to claim 1 is characterized in that with three-electrode system simulated battery device described cylindrical ccontaining cavity (1) and cylindrical piston (2) material are teflon.
3. lithium ion battery according to claim 1 three-electrode system simulated battery device, it is characterized in that described working electrode pole (3) and electrode pole (7) all kept level with the inner bottom surface of the ccontaining cavity at place at the cylinder of electric core perform region one side.
4. lithium ion battery according to claim 1 is characterized in that with three-electrode system simulated battery device described working electrode pole (3), contrast electrode pole (4) and electrode pole (7) are stainless steel.
5. lithium ion battery according to claim 1 three-electrode system simulated battery device, it is characterized in that, described contrast electrode pole (4) is lower than 0.7 millimeter of ccontaining cavity inner bottom surface at the cylinder of electric core perform region one side, contrast electrode is the lithium sheet of 0.2 millimeters thick, and with contrast electrode pole (4) equal diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101909247A CN101464498B (en) | 2008-12-30 | 2008-12-30 | Three-electrode simulation battery equipment used for lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101909247A CN101464498B (en) | 2008-12-30 | 2008-12-30 | Three-electrode simulation battery equipment used for lithium ion battery |
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| Publication Number | Publication Date |
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| CN101464498A CN101464498A (en) | 2009-06-24 |
| CN101464498B true CN101464498B (en) | 2011-05-11 |
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| CN2008101909247A Expired - Fee Related CN101464498B (en) | 2008-12-30 | 2008-12-30 | Three-electrode simulation battery equipment used for lithium ion battery |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104535929B (en) * | 2014-11-14 | 2017-08-25 | 广州擎天实业有限公司 | Three-electrode battery polarity switching circuit |
| CN107102041B (en) * | 2017-06-16 | 2024-01-23 | 济南大学 | Laminated three-electrode electrolytic tank for electrochemical test of in-situ lithium battery |
| KR102558819B1 (en) | 2018-08-29 | 2023-07-24 | 주식회사 엘지에너지솔루션 | Manufacturing method for cylindical theree electrode cell and cylindical theree electrode cell manufactured by the same |
| CN112824887A (en) * | 2019-11-21 | 2021-05-21 | 中国科学院大连化学物理研究所 | Three-electrode electrochemical testing device |
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Granted publication date: 20110511 Termination date: 20111230 |