CN106450431A - Formation method for power lithium ion battery with positive electrode LiMn1-x-yNixCoyO2 system flexible package - Google Patents
Formation method for power lithium ion battery with positive electrode LiMn1-x-yNixCoyO2 system flexible package Download PDFInfo
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- CN106450431A CN106450431A CN201610949075.3A CN201610949075A CN106450431A CN 106450431 A CN106450431 A CN 106450431A CN 201610949075 A CN201610949075 A CN 201610949075A CN 106450431 A CN106450431 A CN 106450431A
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- battery
- lithium ion
- ion battery
- power lithium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Chemical & Material Sciences (AREA)
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- Secondary Cells (AREA)
Abstract
The invention discloses a formation method for a power lithium ion battery with a positive electrode LiMn1-x-yNixCoyO2 system flexible package. A positive electrode active material of the battery is an LiMn1-x-yNixCoyO2 system, and a negative electrode active material of the battery is graphite; during a battery standing process, a formation pressure is applied, and a formation temperature is higher than a room temperature. According to the formation method for the power lithium ion battery with the positive electrode LiMn1-x-yNixCoyO2 system flexible package, reasonable matching is performed on various conditions for battery formation, not only can a better SEI membrane be formed, but also the overall performance of the battery achieves an optimal state.
Description
Technical field
The invention belongs to lithium ion battery manufacture process field, especially relate to a kind of positive pole nickle cobalt lithium manganate system Soft Roll
The chemical synthesizing method of dress power lithium-ion battery.
Background technology
Flexible packing lithium ion battery is melted into：In battery, active substance charges with changing into by means of first time and has normal electrification
The material of effect, makes negative pole form effective SEI film simultaneously.If SEI film forms unstable or consistency not, electrolyte
May proceed to decompose；In the electrochemical reaction of lithium ion battery, SEI film plays vital angle to the properties of battery
Color.Therefore, the fertilizer alleviant of flexible packing lithium ion battery is extremely important for battery performance.
Negative active core-shell material graphitized carbon material initially forms SEI film in 0.8V (vs.Li+/Li), in 0.25V-0V negative
Extremely insert embedding lithium, therefore negative pole current potential 0.2V-0.V (vs.Li+/Li) interval discharge and recharge system for lithium ion battery chemical conversion
Extremely important.
In the prior art, only propose the concept of the chemical conversion pattern of high current pressurization, relatively more general；And same pressure
In the range of arrange in pairs or groups different current systems and temperature, different lithium ion battery SEI films can be formed, have larger shadow to battery performance
Ring.
Content of the invention
In view of this, it is contemplated that proposing a kind of change of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery
One-tenth method, to form preferable SEI film, makes the overall performance of lithium battery reach optimum state.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that：
A kind of chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery, battery anode active material
For nickle cobalt lithium manganate system, negative active core-shell material is graphite, during battery standing, applies chemical conversion pressure, chemical conversion temperature is higher than
Room temperature.
Further, described chemical conversion temperature is 45-50 DEG C, and described chemical conversion pressure is 1Mpa-1.6Mpa, and the time is 10-
60min.
Further, after battery standing, using the electric current constant-current charge of 0.2C-0.3C, the time is 30-40min.
Further, after constant-current charge, battery charges to constant-voltage charge after 4.2V with the electric current of 0.4C-0.5C, works as electric current
It is decreased to charging termination during 0.02C.
With respect to prior art, the change of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery of the present invention
One-tenth method has the advantage that：Positive electrode active materials are nickle cobalt lithium manganate system, and negative active core-shell material is graphite, soft using lamination
The power lithium-ion battery that Package casing technique is made, can form preferable SEI film, and battery overall performance reaches optimum state.
Brief description
Fig. 1 is the vertical Pressurized-heated structural representation described in the embodiment of the present invention；
Fig. 2 is three kinds of scheme works comparison diagrams described in the embodiment of the present invention.
Specific embodiment
To describe the present invention with reference to embodiment and accompanying drawing in detail.
Chemical conversion temperature, refers to using high temperature mode, accelerate the diffusion of ion it is ensured that under high current electronics rapid with ion
In conjunction with.When being melted into temperature and being too low, because larger using electric current, ion velocity is unable to reach and electronic match speed, to SEI film shape
One-tenth has an impact；When being melted into temperature and being too high, electrolyte and material and later stage performance are all had an impact.
Chemical conversion pressure, refer to battery surface increase necessarily vertical pressure it is ensured that battery plus-negative plate interracial contact uniformity,
Electronics is promoted to be uniformly distributed.Vertical Pressurized-heated structural representation such as Fig. 1.When battery core surface pressing is too small, pole piece contacts not
Enough uniformly abundant, this is identical with traditional formation regime；When battery core surface pressing is excessive, the electrolyte of electrode surface is squeezed
Go out, ion concentration reduces, and is unfavorable for that SEI film is formed.If adding constant-pressure pressure on battery core two sides, polarization under charged state can be eliminated
Impact, makes SEI film be formed and reaches most preferably.
Forming current：Because chemical conversion temperature is different, ion velocity is different, so needing the different electric current guarantee of coupling to be formed
Satisfactory SEI film.
In technical solution of the present invention, reach optimal for making SEI film be formed, choose suitable be melted into temperature, forming current and
Chemical conversion pressure is melted into lithium ion battery.
A kind of chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery, battery is positive-active material
Expect for nickle cobalt lithium manganate system, negative active core-shell material is graphite, the core bag made using lamination process is loaded in Soft Roll casing
Secondary lithium battery, during battery standing, apply chemical conversion pressure, chemical conversion temperature be higher than room temperature.
Wherein, described chemical conversion temperature is 45-50 DEG C, and described chemical conversion pressure is 1Mpa-1.6Mpa, and the time is 10-60min.
Wherein, after battery standing, using the electric current constant-current charge of 0.2C-0.3C, the time is 30-40min.
Wherein, after constant-current charge, battery charges to constant-voltage charge after 4.2V with the electric current of 0.4C-0.5C, when electric current reduces
To charging termination during 0.02C.
Provide three kinds of schemes in the present embodiment simultaneously, contrast the battery performance of these three schemes.
Scheme one：Using the condition in technical solution of the present invention as chemical conversion condition, chemical conversion temperature is 45-50 DEG C, chemical conversion pressure
Power is 1Mpa-1.6Mpa, and electric current is 0.2C-0.3C.
Scheme two：Using not in invention condition pressure temperature current carry out chemical conversion condition (example temperature 60-70 DEG C, pressure
0.6-1Mpa, electric current 0.05C-0.2C.
Scheme three：Using traditional chemical conversion condition (room temperature no pressure)
Battery performance contrasts, and result is as follows:
1st, interface is compared：The contact of scheme three categories of etiologic factors is bad, and pole piece has bubble and hinders ion transmission, and scheme two is because of electricity
Stream, temperature, pressure match value be not good, and negative terminal surface has floating lithium and produces, scheme second interface uniformly good no dead band.
2nd, high temperature circulation：Battery in scheme one, two, three is carried out capacity circulating test under high temperature (45 DEG C) environment,
Method of testing：Battery with 1C constant-current constant-voltage charging to 4.2V, cut-off current 0.02C, then 2.75V is discharged to 1C, repetitive cycling,
Carry out battery capacity attenuation verses.Fig. 2 is high temperature circulation Comparative result figure.As can be seen from the comparison result, scheme one is better than it
Its scheme.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (4)
1. the chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery, battery anode active material is nickel cobalt
LiMn2O4 system, negative active core-shell material be graphite it is characterised in that：During battery standing, apply chemical conversion pressure, be melted into temperature
Higher than room temperature.
2. the chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery according to claim 1, its
It is characterised by：Described chemical conversion temperature is 45-50 DEG C, and described chemical conversion pressure is 1Mpa-1.6Mpa, and the time is 10-60min.
3. the chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery according to claim 1 and 2,
It is characterized in that：After battery standing, using the electric current constant-current charge of 0.2C-0.3C, the time is 30-40min.
4. the chemical synthesizing method of positive pole nickle cobalt lithium manganate system flexible packaging power lithium ion battery according to claim 3, its
It is characterised by：After constant-current charge, battery charges to constant-voltage charge after 4.2V with the electric current of 0.4C-0.5C, when electric current is decreased to
Charging termination during 0.02C.
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| CN201610949075.3A CN106450431A (en) | 2016-11-02 | 2016-11-02 | Formation method for power lithium ion battery with positive electrode LiMn1-x-yNixCoyO2 system flexible package |
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| CN201610949075.3A CN106450431A (en) | 2016-11-02 | 2016-11-02 | Formation method for power lithium ion battery with positive electrode LiMn1-x-yNixCoyO2 system flexible package |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482270A (en) * | 2017-08-30 | 2017-12-15 | 东莞市迈科新能源有限公司 | A kind of high-nickel material system lithium-ion electric core activation method |
| CN107579302A (en) * | 2017-10-13 | 2018-01-12 | 骆驼集团新能源电池有限公司 | A kind of Soft Roll lithium ion power battery core rapid forming method |
| CN108574115A (en) * | 2017-03-07 | 2018-09-25 | 深圳格林德能源有限公司 | A kind of nickle cobalt lithium manganate lithium ion battery chemical synthesis technology |
| CN109148989A (en) * | 2018-09-04 | 2019-01-04 | 海口博澳国兴新能源科技有限公司 | Novel lithium ion battery production and application method |
| CN109216809A (en) * | 2017-07-08 | 2019-01-15 | 深圳格林德能源有限公司 | A kind of polymer Li-ion battery pressure chemical synthesis technology |
| CN109860719A (en) * | 2019-01-29 | 2019-06-07 | 杭州天丰电源股份有限公司 | A kind of soft bag lithium ionic cell chemical synthesizing method |
| CN109980310A (en) * | 2017-12-27 | 2019-07-05 | 张家港市国泰华荣化工新材料有限公司 | A kind of soft package lithium battery and its chemical synthesizing method |
| CN111816943A (en) * | 2019-04-10 | 2020-10-23 | Sk新技术株式会社 | Post-treatment method of lithium secondary battery |
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| CN108574115A (en) * | 2017-03-07 | 2018-09-25 | 深圳格林德能源有限公司 | A kind of nickle cobalt lithium manganate lithium ion battery chemical synthesis technology |
| CN109216809A (en) * | 2017-07-08 | 2019-01-15 | 深圳格林德能源有限公司 | A kind of polymer Li-ion battery pressure chemical synthesis technology |
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| CN111816943A (en) * | 2019-04-10 | 2020-10-23 | Sk新技术株式会社 | Post-treatment method of lithium secondary battery |
| CN111816943B (en) * | 2019-04-10 | 2024-03-12 | Sk新能源株式会社 | Pretreatment method of lithium secondary battery |
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Application publication date: 20170222 |