CN208460908U - For measuring the three-electrode battery of battery electrochemical specific surface area active - Google Patents
For measuring the three-electrode battery of battery electrochemical specific surface area active Download PDFInfo
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- CN208460908U CN208460908U CN201821197041.4U CN201821197041U CN208460908U CN 208460908 U CN208460908 U CN 208460908U CN 201821197041 U CN201821197041 U CN 201821197041U CN 208460908 U CN208460908 U CN 208460908U
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- battery
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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
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Abstract
The utility model provides a kind of for measuring the three-electrode battery of battery electrochemical specific surface area active, including shell and coat battery core inside the housing and reference electrode, the reference electrode is located at close to the positive pole ear of the battery core or the side of negative lug, and there are at a distance from 1mm-5mm between battery core.The utility model has structure simple, easy to assembly, can quickly test out the electro-chemical activity interfacial area of positive and negative anodes respectively, and method is easy, and data are reliable.
Description
Technical field
The utility model relates to lithium ion battery test equipment technical fields, more particularly to one kind for measuring battery electricity
The three-electrode battery of chemical activity specific surface area is exclusively used in the dress of the electrochemically active specific surface area of measurement lithium ion cell electrode
It sets, the test device is using different positive and negative pole materials as experimental subjects, and test obtains electric double layer capacitance value, to pass through calculating
Electrochemically active specific surface area is obtained, method is easy, and data are reliable.
Background technique
Lithium ion battery has energy density height, power density height, stable operating voltage, has a safety feature, cycle life
The advantages that length, memory-less effect, the extensive concern by every industry or trade and research worker, it is considered to be comprehensive performance is best
Battery system.
Development recently as portable electronic products and the urgent need to electric car, so that high energy density cells
And its research of associated materials becomes the hot spot of domestic and international scientific research.Wherein, the research of positive and negative pole material, which becomes, improves electricity
The key of pond performance.During the performance of Electrode material, the chemical property of electrode material, the electricity of electrode are usually tested
Chemical activity specific surface area is exactly a common parameter, and the measurement for electrochemically active specific surface area is conducive to battery core and grinds
The overall development of hair and battery industry.
Utility model content
The technical problem to be solved by the utility model is in order to overcome the shortcomings in the prior art, the utility model mentions
For a kind of for measuring the three-electrode battery of battery electrochemical specific surface area active, using short-cut method, it is quickly obtained accurately
Positive and negative anodes electrode electro Chemical specific surface area active.The three-electrode battery can measure the electric double layer capacitance of positive and negative anodes simultaneously, thus
The electrochemically active specific surface area of positive and negative electrode is obtained, method is easy, and data are reliable.
The utility model solves its technical problem technical solution to be taken: one kind is living for measuring battery electrochemical
Property specific surface area three-electrode battery, including shell and cladding battery core inside the housing and reference electrode, the reference electricity
Pole is located at close to the positive pole ear of the battery core or the side of negative lug, and protects between battery core there are at a distance from 1mm-5mm
Demonstrate,proving reference electrode has stable current potential.
Specifically, the reference electrode includes reference tab and lithium piece, and pass through copper between the reference tab and lithium piece
Silk connection.
Further, the lithium piece doubling is clipped in the tail end of the copper wire.Since lithium piece has preferable flexibility,
It is fixed on copper wire tail end by the way of doubling clamping, in addition, lithium piece is easy to react in air or under high temperature, therefore not
It is suitble to welding, only simple doubling, guarantees and copper wire contacts.
Specifically, the reference tab is nickel plating tab.
Specifically, the shape of the lithium piece is round, ellipse or polygon.As long as the shape of lithium piece can satisfy test
Requirement, be also not necessarily limited to shape given herein above.
Preferably, the lithium piece with a thickness of 20 μm -100 μm, preferably 60 μm.Lithium piece thickness can be according to the specification of battery
It is configured.
Preferably, the length of the copper wire is 50mm-100mm.The length needs of copper wire are matched with the size of battery.
Specifically, the battery core includes the diaphragm set gradually, positive plate, diaphragm, negative electrode tab and diaphragm, the anode pole
Ear is electrically connected with positive plate, and the negative lug is electrically connected with negative electrode tab.
Preferably, the shell is made using aluminum plastic film.
Further, the electrolyte of 20g~25g is marked between the battery core and shell.The battery core is encapsulated to aluminum plastic film
Inject the electrolyte of 20g~25g.
Battery is using lamination soft pack cell, when assembly, is added one in positive pole ear (can also be in negative lug) side
A nickel plating reference tab for having welded copper wire simultaneously presss from both sides a piece of lithium piece as reference electrode in the end of copper wire, in the battery, uses
Diaphragm encases lithium piece, and is fixed with insulating tape, after being assembled using aluminum plastic film, is added beyond needed for pole piece immersion test
Electrolyte 2g or so.By being normally melted into, being evacuated, two envelopes, constant volume process, obtain three-electrode battery, sealed in aluminum plastic film
30~60s of pumpdown time is controlled in journey, controls vacuum degree -80~-100kPa.
When test loop volt-ampere curve, current line connects battery plus-negative plate, and pressure-wire connects anode and reference electrode.This is practical new
The three-electrode system that type uses, on the one hand uses lithium piece as reference electrode, can decomposite battery plus-negative plate to the electricity of lithium piece
Pressure, can the voltage to positive and negative anodes analyze respectively so that analysis have more accuracy；Meanwhile it can use reference electrode
Double capacitors of positive and negative anodes are tested out, the electro-chemical activity interfacial area of positive and negative anodes can be calculated conducive to double capacitors.With structure
Simply, easy to assembly, the electro-chemical activity interfacial area of positive and negative anodes can be quickly tested out respectively, and method is easy, and data are reliable.
The beneficial effects of the utility model are: one kind provided by the utility model compares table for measuring battery electrochemical activity
The three-electrode battery of area can disassemble the electrochemical behavior of battery plus-negative plate by addition lithium piece as reference electrode,
The electric double layer capacitance of positive and negative anodes can fast and accurately be measured.Easy to operate, method is fast and reliable, and the utility model can be direct
The electrochemical behavior of measurement positive and negative anodes wants enhanced convenience quick compared to traditional button electricity assembling test.It is bypassed in core coil
Three-layer membrane is wrapped up in journey, can be very good to prevent battery from internal short-circuit occurs, and prevent lithium reference electrode from contacting with electrode slice
Short circuit occurs, irreversible consumption is generated to lithium piece.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the structural schematic diagram of the best embodiment of the utility model；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the schematic diagram of the section structure of battery core；
In figure: 1, positive pole ear, 2, negative lug, 3, reference tab, 4, lithium piece, 5, copper wire, 6, battery core, 6-1, anode
Piece, 6-2, negative electrode tab, 6-3, diaphragm, 7, shell.
Specific embodiment
The utility model is described in detail presently in connection with attached drawing.This figure is simplified schematic diagram, only in a schematic way
Illustrate the basic structure of the utility model, therefore it only shows composition related with the utility model.
As shown in Figure 1-Figure 3, the utility model is a kind of for measuring three electrodes of battery electrochemical specific surface area active
Battery, including shell 7 and the battery core being coated on inside shell 76 and reference electrode, shell 7 is made using aluminum plastic film, institute
It states reference electrode to be located at close to the positive pole ear 1 of the battery core 6 or the side of negative lug 2, the present embodiment is positive pole ear 1 one
Side, and be not directly contacted between battery core 6 there are at a distance from 1mm-5mm, guarantee that reference electrode has stable current potential.
Battery core 6 using lamination soft pack cell 6, diaphragm 6-3 including successively lamination, single side coating positive plate 6-1, every
Film 6-3, single side coat negative electrode tab 6-2 and diaphragm 6-3, the active material of pole piece applied atop, conductive agent and binder.
The reference electrode includes nickel plating reference tab 3 and round lithium piece 4, and is led between the reference tab 3 and lithium piece 4
Cross the connection of copper wire 5.
When preparing this three-electrode battery, coating single side anode and single side cathode, negative electrode tab 6-2 are slightly larger than positive plate 6-1,
Single side anode is placed in outside, includes containing a piece of diaphragm 6-3, single side positive plate 6-1, diaphragm 6-3, single side cathode in battery core 6
Piece 6-2, diaphragm 6-3, in 6 left side of battery core, add a nickel plating reference tab 3, and weld the copper wire of long 50mm when assembling closedtop
5,5 tail end of copper wire, 60 μm of 4 thickness of lithium piece are clipped in disk lithium piece 4 (thickness 0.5mm) doubling that button electricity uses.Lithium piece 4 and battery core
There is the spacing of 2mm between 6, avoids internal short-circuit of battery.
In the encapsulation to aluminum plastic film of battery core 6, battery is assembled later according to electrolyte needed for being added beyond pole piece immersion test
2g or so is preferably injected the electrolyte of 20g~25g.By being normally melted into, being evacuated, two envelopes, constant volume process, obtain three electrodes
Battery.30~60s of pumpdown time is controlled in aluminum plastic film capping processes, controls vacuum degree -80~-100kPa.
Cyclic voltammetry is carried out to battery, in test, the testing current line of electrochemical workstation connects the positive and negative of battery
Pole, voltage tester line connect surveyed electrode and reference electrode, and polarization curve scanning is carried out first at 20%SOC and 100%SOC,
Scanning range is 3-4.2V.Non-electroactive scanning area is determined according to CV curve, then in non-electroactive voltage belt
Interior carry out cyclic voltammetry scan takes second week loop-around data integral to acquire capacitor.Think all electric double layer capacitance C of electric current.
Its derivation formula is as follows:
∵ V=V0+vt
∴ dV=vdt
Wherein Q is electricity, and V is voltage, and i is electric current, V0For initial voltage, v is scanning speed, and △ V is voltage change,
T is sweep time.
In an acidic solution, general to be adsorbed on electric double layer capacitance C composed by electrode surface hydroneNAbout 50 μ F/
cm。
According to the relationship of electro-chemical activity specific surface area and electric double layer capacitance are as follows:
Wherein, S is the total active area of electrode, and C is electric double layer capacitance, CNIt is molten in acidity for smooth surface standard capacitance
It is active material quality that 50 μ F/cm, m are generally in liquid.
It voltage and sweeps speed and measurement result can be affected before sweeping, when voltage is higher before sweeping that speed is smaller and sweeping, faraday's electricity
Stream is affected to result.It is larger to sweep speed, voltage is lower before sweeping, and capacitance is more accurate, the specific surface area value thus calculated
Also more accurate, the pole piece true area obtained according to charge and discharge capacitance is much larger than apparent area, and specific surface area is slightly below lived
Property particle BET data, therefore have credibility.
The specific embodiment of the utility model design is presented above, to use straightforward procedure, is quickly obtained reliable
Data, three electrode assemblies of the utility model using addition lithium piece 4 as reference electrode.The three-electrode battery device on the one hand can
To decomposite battery plus-negative plate to the electrochemical behavior of lithium piece 4, so that test is more by the electrochemical behavior in three-electrode battery
Add convenient and efficient, improves the accuracy of test.On the other hand, which can be real with various positive and negative anodes electrode materials
Object is tested, accurate electric double layer capacitance value can be obtained easily and fast, the electric double layer capacitance of positive and negative anodes can be measured simultaneously, from
And calculate the electrochemically active specific surface area of positive and negative anodes.It avoids and button cell is assembled respectively to positive and negative anodes, this three electrode electricity
Pool structure is simple, and positive and negative pole material is studied, and can fast and accurately obtain electrochemically active specific surface area data, number
According to reliable.
It is enlightenment, through the above description, relevant work with the above-mentioned desirable embodiment according to the utility model
Personnel can carry out various changes and amendments in without departing from the scope of the utility model completely.This item utility model
Technical scope is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that: including shell (7) with
And it is coated on the internal battery core (6) of shell (7) and reference electrode, the reference electrode is located at the anode close to the battery core (6)
The side of tab (1) or negative lug (2), and there are the spacing of 1mm-5mm between battery core (6).
2. as described in claim 1 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The reference electrode includes reference tab (3) and lithium piece (4), and passes through copper wire between the reference tab (3) and lithium piece (4)
(5) it connects.
3. as claimed in claim 2 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
Lithium piece (4) doubling is clipped in the tail end of the copper wire (5).
4. as claimed in claim 2 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The reference tab (3) is nickel plating tab.
5. as claimed in claim 2 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The shape of the lithium piece (4) is round, ellipse or polygon.
6. as claimed in claim 2 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The lithium piece (4) with a thickness of 20 μm -100 μm.
7. as claimed in claim 2 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The length of the copper wire (5) is 50mm-100mm.
8. as described in claim 1 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The battery core (6) includes the diaphragm (6-3) set gradually, positive plate (6-1), diaphragm (6-3), negative electrode tab (6-2) and diaphragm (6-
3), the positive pole ear (1) is electrically connected with positive plate (6-1), and the negative lug (2) is electrically connected with negative electrode tab (6-2).
9. as described in claim 1 for measuring the three-electrode battery of battery electrochemical specific surface area active, it is characterised in that:
The shell (7) is made using aluminum plastic film.
10. as claimed in claim 9 for measuring the three-electrode battery of battery electrochemical specific surface area active, feature exists
In: the electrolyte of 20g~25g is marked between the battery core (6) and shell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821197041.4U CN208460908U (en) | 2018-07-26 | 2018-07-26 | For measuring the three-electrode battery of battery electrochemical specific surface area active |
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| CN201821197041.4U CN208460908U (en) | 2018-07-26 | 2018-07-26 | For measuring the three-electrode battery of battery electrochemical specific surface area active |
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| Publication Number | Publication Date |
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| CN208460908U true CN208460908U (en) | 2019-02-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907514A (en) * | 2019-10-30 | 2020-03-24 | 上海德朗能动力电池有限公司 | Three-electrode electrolytic cell for studying electrochemical behavior of single electrode of sealed battery |
| CN111063939A (en) * | 2019-12-19 | 2020-04-24 | 东莞维科电池有限公司 | Three-electrode battery and preparation method thereof |
| CN112290033A (en) * | 2020-09-25 | 2021-01-29 | 天能电池集团股份有限公司 | Grid surface area calculation method |
| CN113358019A (en) * | 2021-02-18 | 2021-09-07 | 厦门厦钨新能源材料股份有限公司 | Method for measuring and calculating electrochemical specific surface area of lithium ion battery cathode material and application thereof |
| CN114284564A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Soft package battery with constant potential reference electrode and preparation method thereof |
| WO2023123427A1 (en) * | 2021-12-31 | 2023-07-06 | 东莞新能源科技有限公司 | Electrochemical device and electronic device comprising same |
-
2018
- 2018-07-26 CN CN201821197041.4U patent/CN208460908U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907514A (en) * | 2019-10-30 | 2020-03-24 | 上海德朗能动力电池有限公司 | Three-electrode electrolytic cell for studying electrochemical behavior of single electrode of sealed battery |
| CN111063939A (en) * | 2019-12-19 | 2020-04-24 | 东莞维科电池有限公司 | Three-electrode battery and preparation method thereof |
| CN112290033A (en) * | 2020-09-25 | 2021-01-29 | 天能电池集团股份有限公司 | Grid surface area calculation method |
| CN113358019A (en) * | 2021-02-18 | 2021-09-07 | 厦门厦钨新能源材料股份有限公司 | Method for measuring and calculating electrochemical specific surface area of lithium ion battery cathode material and application thereof |
| CN113358019B (en) * | 2021-02-18 | 2024-03-29 | 厦门厦钨新能源材料股份有限公司 | Measuring and calculating method for electrochemical specific surface area of lithium ion battery anode material and application thereof |
| CN114284564A (en) * | 2021-12-06 | 2022-04-05 | 上海空间电源研究所 | Soft package battery with constant potential reference electrode and preparation method thereof |
| CN114284564B (en) * | 2021-12-06 | 2024-02-09 | 上海空间电源研究所 | Soft-packed battery with constant potential reference electrode and preparation method thereof |
| WO2023123427A1 (en) * | 2021-12-31 | 2023-07-06 | 东莞新能源科技有限公司 | Electrochemical device and electronic device comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: Kaibo Energy Technology Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: Kaibo Energy Technology Co.,Ltd. Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220117 Address after: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: 166 Kejiao Road, Jintan District, Changzhou City, Jiangsu Province Patentee before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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| TR01 | Transfer of patent right |