CN202949008U - Triple-electrode device of lithium ion battery - Google Patents
Triple-electrode device of lithium ion battery Download PDFInfo
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- CN202949008U CN202949008U CN2012205938024U CN201220593802U CN202949008U CN 202949008 U CN202949008 U CN 202949008U CN 2012205938024 U CN2012205938024 U CN 2012205938024U CN 201220593802 U CN201220593802 U CN 201220593802U CN 202949008 U CN202949008 U CN 202949008U
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- lithium ion
- reference electrode
- ion battery
- negative pole
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model belongs to the field of lithium ion batteries, and particularly relates to a triple-electrode device of a lithium ion battery, which aims to overcome the defects of poor sensitivity, poor tightness, liquid leakage of intervals among electrode lugs of the triple-electrode device in the prior art. The triple-electrode device of the lithium ion battery comprises a shell, an anode, a cathode and a reference electrode, wherein the anode, the cathode and the reference electrode are assembled in a laminated mode, and are sealed in the shell, partition membranes are arranged between the anode and the cathode as well as between the cathode and the reference electrode, and the electrode lugs of the anode, the cathode and the reference electrode are respectively guided out from different sides of the shell. The triple-electrode device has the advantages of simple structure, high sensitivity and favorable tightness.
Description
Technical field
The utility model belongs to lithium ion battery field, particularly a kind of three electrode assemblies of lithium ion battery.
Background technology
At present, be the important step that present lithium ion battery further improves performance, undergoes technological transformation to the test and evaluation of the chemical property of the new electrode material of battery, battery system.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, especially for small parameter error than a more sensitive class electro-chemical test, as linear scan, AC impedance etc.Therefore, how simply and effectively to obtain the intrinsic chemical property of this class electrode material, to the further adjustment of electrode material with improve important.Accurately measure the parameter of electrochemical reaction process, the general three-electrode system that adopts, the specific sensibility to water and oxidizing atmosphere of lithium-ion battery system has determined that again it can't adopt simple three-electrode system, how simply and effectively to determine the locus of three electrodes and realize on this basis no leakage, measure to be conveniently the three of paramount importance factors of electrode assembly design under atmospheric environment.
Chinese patent Granted publication CN2757128Y, February 8 2006 Granted publication day, three electrode assemblies in a kind of polymer and liquid soft package lithium ion battery are disclosed, it is at two utmost point homonymies of entity inside battery, lithium metal is arranged as the 3rd reference electrode, the 3rd reference electrode is drawn the 3rd reference electrode post by lead-in wire.The area of lithium metal the 3rd reference electrode is 2 * 4mm, and thickness is 0.5mm.The 3rd reference electrode post and primary cell two poles are on same battery surface.This utility model is simple in structure, and is easy to use, and weak point is: this three electrode assemblies sealing is poor, and the lug gap position of the electrode of homonymy can go out the phenomenon of leakage.
Summary of the invention
The purpose of this utility model is to solve that three electrode assembly sensitivitys of prior art are poor, sealing shape is poor, and the deficiency that the lug gap can leakage provides a kind of three electrode assemblies of lithium ion battery of simple in structure, highly sensitive, good airproof performance.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of three electrode assemblies of lithium ion battery, comprise housing, positive pole, negative pole and reference electrode, anodal, negative pole and reference electrode be lamination assembling and being packaged in housing successively, between positive pole and negative pole, be provided with barrier film between negative pole and reference electrode, the lug of anodal, negative pole and reference electrode is drawn from the not ipsilateral of housing respectively.Negative pole is between positive pole and reference electrode, and reference electrode and negative pole are as far as possible close, is separated by barrier film between the two, can eliminate to the full extent the impact that the solution internal resistance produces polarization, the sensitivity that has improved three electrode assemblies; Positive pole, negative pole, reference electrode adopt respectively three directions to go out lug, can directly avoid gap between two lugs the not tight and leakage problem that causes of encapsulation to occur.
As preferably, described reference electrode is metal lithium sheet, and the diameter of metal lithium sheet is 10 ~ 20mm, and the thickness of metal lithium sheet is 0.2cm.
As preferably, the composite membrane of described barrier film for being consisted of by polypropylene screen and polyethylene film.
As preferably, the length of described positive pole is 1 ~ 3cm, and width is 1 ~ 3cm.
As preferably, the length of described negative pole is 1 ~ 3cm, and width is 1 ~ 3cm.
The beneficial effects of the utility model are: reasonable in design, simple in structure, compact, and good airproof performance; Eliminate the impact that the solution internal resistance produces polarization, detection sensitivity is high; Easy to use, applied range.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the mode that the stacks schematic diagram of electrode in Fig. 1;
In figure: 1, positive pole, 2, negative pole, 3, reference electrode, 4, barrier film, 5, housing.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
three electrode assemblies of a kind of lithium ion battery as shown in Figure 1, comprise anodal 1, negative pole 2, reference electrode 3 and housing 5, reference electrode 3 is metal lithium sheet, the diameter of metal lithium sheet is 10 ~ 20mm, the present embodiment adopts 16mm, the thickness of metal lithium sheet is 0.2cm, anodal 1 length is 1 ~ 3cm, the present embodiment adopts 2cm, width is 1 ~ 3cm, the present embodiment adopts 2cm, the length of negative pole 2 is 1 ~ 3cm, the present embodiment adopts 2cm, width is 1 ~ 3cm, the present embodiment adopts 2cm, negative pole 2 is between positive pole 1 and reference electrode 3, between positive pole 1 and negative pole 2, be provided with barrier film 4 between negative pole 2 and reference electrode 3, the composite membrane of barrier film 4 for being consisted of by polypropylene screen and polyethylene film, the double-layered compound film that the present embodiment barrier film 4 adopts one deck polypropylene screen and layer of polyethylene film to consist of, as shown in Figure 2, anodal 1, barrier film 4, negative pole 2, barrier film 4 and reference electrode 3 superpose in order and are placed in housing 5, wherein anodal 1, negative pole 2, reference electrode 3 is towards three different directions, then three limits of preferential heat-seal housing 5, the last item limit is heat-sealing again after fluid injection is completed, anodal 1, negative pole 2, reference electrode 3 all immerses in electrolyte, three electrodes of the present utility model are positioned at different azimuth, battery container 5 is easy to sealing.
Adopt the utility model research lithium ion cell electrode performance methodology as follows:
The collector of positive pole 1, negative pole 2, reference electrode 3 all adopts copper nickel plating sheet, the lug of positive pole 1, negative pole 2, reference electrode 3 all adopts copper nickel plating lug, with positive and negative electrode material to be tested routinely processes become positive and negative plate, then be assembled into as stated above three electrode assemblies, be assembled into together three-electrode system with Agilent data acquisition unit, Princeton V3 electrochemical workstation and two secondary computers (computer is to control electrochemical workstation, and another computer is to control data acquisition unit) again.
Apply a constant electric current between positive pole 1 and negative pole 2 by electrochemical workstation, (namely being equivalent to battery is launched the initial charge process), lithium ion is deviate from from anodal 1, embed negative pole 2, in this process, the positive and negative electrode current potential all changes, the magnitude of voltage under the computer recording that electrochemical workstation connects between positive and negative electrode; The computer that is connected with data acquisition unit under synchronous recording anodal 1 and reference electrode 3 between magnitude of voltage between voltage and negative pole 2 and reference electrode, and then by measuring voltage-charging interval functional relation between full cell voltage-charging interval functional relation, negative pole 2 and reference electrode 3, positive pole 1, the electrochemical characteristic of negative pole 2 in every electric performance test of full battery are launched research.
Above-described embodiment is a kind of better scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (5)
1. three electrode assemblies of a lithium ion battery, comprise housing (5), anodal (1), negative pole (2) and reference electrode (3), it is characterized in that, anodal (1), negative pole (2) and reference electrode (3) be lamination assembling and being packaged in housing (5) successively, between anodal (1) and negative pole (2), be provided with barrier film (4) between negative pole (2) and reference electrode (3), the lug of positive pole (1), negative pole (2) and reference electrode (3) is drawn from the not ipsilateral of housing (5) respectively.
2. three electrode assemblies of a kind of lithium ion battery according to claim 1, is characterized in that, described reference electrode (3) is metal lithium sheet, and the diameter of metal lithium sheet is 10 ~ 20mm, and the thickness of metal lithium sheet is 0.2cm.
3. three electrode assemblies of a kind of lithium ion battery according to claim 1 and 2, is characterized in that, the composite membrane of described barrier film (4) for being made of polypropylene screen and polyethylene film.
4. three electrode assemblies of a kind of lithium ion battery according to claim 1 and 2, is characterized in that, the length of described positive pole (1) is 1 ~ 3cm, and width is 1 ~ 3cm.
5. three electrode assemblies of a kind of lithium ion battery according to claim 1 and 2, is characterized in that, the length of described negative pole (2) is 1 ~ 3cm, and width is 1 ~ 3cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205938024U CN202949008U (en) | 2012-11-13 | 2012-11-13 | Triple-electrode device of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205938024U CN202949008U (en) | 2012-11-13 | 2012-11-13 | Triple-electrode device of lithium ion battery |
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| CN202949008U true CN202949008U (en) | 2013-05-22 |
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| CN2012205938024U Expired - Fee Related CN202949008U (en) | 2012-11-13 | 2012-11-13 | Triple-electrode device of lithium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206867A (en) * | 2015-10-09 | 2015-12-30 | 天津市捷威动力工业有限公司 | Three-electrode system for lithium ion battery and preparation method thereof |
| CN105470577A (en) * | 2015-02-16 | 2016-04-06 | 万向A一二三系统有限公司 | Three-electrode assembly method of soft package lithium ion battery |
| CN107959056A (en) * | 2016-10-17 | 2018-04-24 | 通用汽车环球科技运作有限责任公司 | Battery is tested in three poles |
| CN111987379A (en) * | 2020-09-14 | 2020-11-24 | 江苏塔菲尔动力系统有限公司 | Lithium ion battery with reference electrode and preparation method thereof |
| CN112054260A (en) * | 2020-08-26 | 2020-12-08 | 昆山宝创新能源科技有限公司 | Three-electrode battery |
| CN112098863A (en) * | 2020-09-14 | 2020-12-18 | 江苏塔菲尔动力系统有限公司 | Method, device and system for detecting failure of lithium ion battery |
| CN112798959A (en) * | 2020-12-30 | 2021-05-14 | 东方旭能(山东)科技发展有限公司 | Three-electrode testing device for lithium battery |
-
2012
- 2012-11-13 CN CN2012205938024U patent/CN202949008U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470577A (en) * | 2015-02-16 | 2016-04-06 | 万向A一二三系统有限公司 | Three-electrode assembly method of soft package lithium ion battery |
| CN105206867A (en) * | 2015-10-09 | 2015-12-30 | 天津市捷威动力工业有限公司 | Three-electrode system for lithium ion battery and preparation method thereof |
| CN107959056A (en) * | 2016-10-17 | 2018-04-24 | 通用汽车环球科技运作有限责任公司 | Battery is tested in three poles |
| CN112054260A (en) * | 2020-08-26 | 2020-12-08 | 昆山宝创新能源科技有限公司 | Three-electrode battery |
| CN111987379A (en) * | 2020-09-14 | 2020-11-24 | 江苏塔菲尔动力系统有限公司 | Lithium ion battery with reference electrode and preparation method thereof |
| CN112098863A (en) * | 2020-09-14 | 2020-12-18 | 江苏塔菲尔动力系统有限公司 | Method, device and system for detecting failure of lithium ion battery |
| CN112798959A (en) * | 2020-12-30 | 2021-05-14 | 东方旭能(山东)科技发展有限公司 | Three-electrode testing device for lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130522 Termination date: 20191113 |