CN101764261A - Formation method for lithium ion battery - Google Patents
Formation method for lithium ion battery Download PDFInfo
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- CN101764261A CN101764261A CN201010300900A CN201010300900A CN101764261A CN 101764261 A CN101764261 A CN 101764261A CN 201010300900 A CN201010300900 A CN 201010300900A CN 201010300900 A CN201010300900 A CN 201010300900A CN 101764261 A CN101764261 A CN 101764261A
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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 invention relates to a formation method for a lithium ion battery, which comprises the following steps of: performing constant current charge for 240 to 450 minutes and then performing constant current discharge until voltage reaches 2.7 to 2.0V; and performing second constant current charge for 270 to 490 minutes and then performing constant current discharge until the voltage reaches 2.6 to 2.2V. In the method, the charge/discharge current is the same current, so the operation is simple and convenient and the production efficiency is enhanced; the circulation performance of the battery formed by the formation method is improved and enhanced; and the problem of long formation time in the traditional formation system is solved and the production efficiency is enhanced.
Description
Technical field
The present invention relates to a kind of compound method for lithium ion battery, belong to technical field of electrochemistry.
Background technology
Lithium ion battery is the green high-capacity environment-protecting battery that occurs the nineties in 20th century, has outstanding advantages such as operating voltage height, specific energy are big, receive much concern with the materials chemistry field at energy chemistry, and be one of present chemical power source industry latest development direction.
Lithium battery needs it is changed into after making, and the purpose that changes into is to make battery externally have the performance of electricity, can accept charging into and electric energy being discharged of electric energy, and with the battery sorting on demand of performance index unanimity and combine.The system that changes into has very big influence to the performance of battery.Traditional little pre-charge mode helps stable SEI film to form, thereby can effectively improve the performance of lithium ion battery, but the SEI membrane impedance that long low current charge can cause forming increases, thereby influence the multiplying power discharging property of lithium ion battery, process time is long to influence production efficiency, in addition, for the LiFePO4 system, when charging voltage during, the lattice structure of LiFePO4 is damaged, thereby influence the cycle performance of battery greater than 3.7V.
Publication number is the chemical synthesizing method that the Chinese patent application of CN101212066A discloses a kind of lithium rechargeable battery, earlier with constant current charge to the V1 volt, cycle charge-discharge is at least once between V1 and V2 volt then, again with constant current charge to the V3 volt, cycle charge-discharge is at least once between V3 and V4 volt then, the method can solve gas and retain influence to battery charge, obtains uniform and stable SEI film, but the electric current that discharges and recharges needs repeatedly to adjust.Publication number is the disclosed lithium rechargeable battery chemical synthesizing method of the Chinese patent application of CN101330158A, at first be with little electric current constant current charge, continue constant current charge with big slightly electric current then, wherein be also included within the process of introducing constant-current discharge between twice constant current charge, and charging process to small part should be to carry out under vacuum condition.Publication number is the disclosed lithium rechargeable battery chemical synthesizing method of the Chinese patent application of CN101286578A, formation process comprises first low current charge, and large current charge leaves standstill after the constant voltage charge more then, be the constant-current discharge process at last, its formation process carries out under vacuum condition.Above-mentioned two kinds of modes that change into all need vacuum condition, and good exhaust effect has been avoided because of gas gathers the problem that battery case expansion, the problem on deformation that causes and the battery performance that brings thus descend, but condition control and all higher to the requirement of equipment.
Summary of the invention
The object of the present invention is to provide a kind of compound method for lithium ion battery, the inventive method operation control is simple, the good cycle of battery.
Technical program of the present invention lies in having adopted a kind of compound method for lithium ion battery, comprise first constant current charge 240 ~ 450 minutes, constant-current discharge to voltage is 2.7 ~ 2.0V again, constant current charge 270 ~ 490 minutes for the second time then, and constant-current discharge to voltage is 2.6 ~ 2.2V again.
Described constant current charge electric current is 0.01 ~ 0.3C.
Described constant-current discharge electric current is 0.01 ~ 0.3C.
Described chemical synthesizing method also comprised placement before second time constant current charge, be 5～30 minutes standing time.
The system of changing into provided by the invention is applicable to changing into of stacked and coiled battery, wherein needs ageing 4～72h to changing into after the fluid injection, and the temperature when battery changes into is 15～45 ℃.
Beneficial effect of the present invention: the charging and discharging currents in (1) the inventive method is same electric current, controls simple and conveniently, has improved production efficiency; (2) cycle performance of battery after using this chemical synthesizing method to change into improves and improves; (3) improve the tradition system of changing into and change into long problem of time, improved production efficiency.
Embodiment
Embodiment 1
The chemical synthesizing method of present embodiment lithium rechargeable battery
Make the 40AH battery according to the conventional flow process of making of lithium ion battery, after still aging, adopt following steps that battery is changed into:
(1) 0.01 ~ 0.08C constant current charge 400 ~ 450 minutes;
(2) 0.01 ~ 0.08C constant-current discharge to 2.7 ~ 2.4V;
(3) 0.01 ~ 0.08C constant current charges 430 ~ 490 minutes;
(4) 0.01 ~ 0.08C constant-current discharge to 2.6 ~ 2.4V.
The capacity of this battery and attenuation rate are as shown in table 1 after testing after changing into.
Embodiment 2
The chemical synthesizing method of present embodiment lithium rechargeable battery
Make flow process according to above-mentioned lithium ion battery and make the 40AH battery, after still aging, adopt following steps that battery is changed into:
(1) 0.1 ~ 0.3C constant current charge 240 ~ 300 minutes;
(2) 0.1 ~ 0.3C constant-current discharge to 2.4 ~ 2.0V;
(3) 0.1 ~ 0.3C constant current charges 270 ~ 330 minutes;
(4) 0.1 ~ 0.3C constant-current discharge to 2.4 ~ 2.2V.
Wherein before step (3) constant current charge, battery was placed 5～10 minutes, discharge more fully to guarantee the gas that produces in the charge and discharge process, the capacity of this battery and attenuation rate are as shown in table 1 after testing after changing into.
Embodiment 3
The chemical synthesizing method of present embodiment lithium rechargeable battery
Make flow process according to above-mentioned lithium ion battery and make the 40AH battery, after still aging, adopt following steps that battery is changed into:
(1) 0.08 ~ 0.1C constant current charge 300 ~ 400 minutes;
(2) 0.08 ~ 0.1C constant-current discharge to 2.6 ~ 2.4V;
(3) 0.08 ~ 0.1C constant current charges 330 ~ 400 minutes;
(4) 0.08 ~ 0.1C constant-current discharge to 2.5 ~ 2.3V.
Wherein before step (3) constant current charge, battery was placed 20～30 minutes, discharge more fully to guarantee the gas that produces in the charge and discharge process, the capacity of this battery and attenuation rate are as shown in table 1 after testing after changing into.
Comparative Examples
Make flow process according to above-mentioned lithium ion battery and make the 40AH battery.Adopt the following system of changing into to change into:
(1) 0.05 ~ 0.1C constant current charge to 4.0 ~ 4.2V;
(2) 4.0 ~ 4.2V constant voltage charges to electric current is 0.2 ~ 1A;
(3) 0.05 ~ 0.1C constant-current discharge to 2.5 ~ 2.2V.
The capacity of this battery and attenuation rate are as shown in table 1 after testing after changing into.
Table 1 battery changes into its capacity of back and attenuation rate testing result
| The embodiment label | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example |
| Discharge capacity (ampere-hour) first | ????42.9 | ???????42.7 | ?????42.9 | ????43.9 |
| Change into the time (hour) | ????22～25 | ???????20～24 | ?????21～24 | ????26～32 |
| 50 capacity attenuation rates (%) | ????0.62 | ???????0.65 | ?????0.63 | ????1.06 |
| 100 capacity attenuation rates (%) | ????1.10 | ???????1.18 | ?????1.12 | ????1.99 |
| 150 capacity attenuation rates (%) | ????1.56 | ???????1.63 | ?????1.60 | ????2.86 |
| 200 capacity attenuation rates (%) | ????2.06 | ???????2.12 | ?????2.08 | ????3.51 |
| 250 capacity attenuation rates (%) | ????2.48 | ???????2.52 | ?????2.50 | ????4.22 |
| 300 capacity attenuation rates (%) | ????2.96 | ???????3.06 | ?????3.01 | ????5.10 |
By data in the table as can be known, compare with the battery that the Comparative Examples method changes into, adopt the battery of chemical synthesis technology of the present invention, the cycle performance of battery significantly improves, this illustrates that chemical synthesizing method provided by the invention can obviously improve the formation condition of SEI film, helps forming more all even stable SEI film.In addition, adopt chemical synthesis technology of the present invention, can significantly enhance productivity.
Claims (4)
1. compound method for lithium ion battery, it is characterized in that: described chemical synthesizing method comprises first constant current charge 240 ~ 450 minutes, constant-current discharge to voltage is 2.7 ~ 2.0V again, constant current charge 270 ~ 490 minutes for the second time then, and constant-current discharge to voltage is 2.6 ~ 2.2V again.
2. a kind of compound method for lithium ion battery according to claim 1 is characterized in that: described constant current charge electric current is 0.01 ~ 0.3C.
3. a kind of compound method for lithium ion battery according to claim 1 and 2 is characterized in that: described constant-current discharge electric current is 0.01 ~ 0.3C.
4. a kind of compound method for lithium ion battery according to claim 1 is characterized in that: before second time constant current charge, can also comprise placement, be 5～30 minutes standing time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010300900A CN101764261A (en) | 2010-01-28 | 2010-01-28 | Formation method for lithium ion battery |
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| CN201010300900A CN101764261A (en) | 2010-01-28 | 2010-01-28 | Formation method for lithium ion battery |
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| CN101764261A true CN101764261A (en) | 2010-06-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856590A (en) * | 2012-09-21 | 2013-01-02 | 深圳市美拜电子有限公司 | Forming and capacity grading method of lithium ion secondary battery |
| CN103894350A (en) * | 2014-03-26 | 2014-07-02 | 山东精工电子科技有限公司 | Capacitance-grading screening and grouping method for cylindrical lithium battery |
| CN104124484A (en) * | 2014-08-08 | 2014-10-29 | 江苏超威电源有限公司 | Vacuum negative pressure type quick-charging method of cadmium-free internal-formation storage battery |
| CN105161766A (en) * | 2015-08-05 | 2015-12-16 | 柳州豪祥特科技有限公司 | Filling formation method for power type lithium battery |
| CN109216771A (en) * | 2017-06-29 | 2019-01-15 | 青岛恒金源电子科技有限公司 | A kind of partial volume method produced during lithium ion battery |
| CN113241479A (en) * | 2021-04-29 | 2021-08-10 | 合肥国轩高科动力能源有限公司 | High-efficiency formation method of lithium battery |
| CN114188596A (en) * | 2021-11-23 | 2022-03-15 | 郑州比克电子有限责任公司 | Pre-activation method of lithium ion battery |
| CN114388892A (en) * | 2021-12-02 | 2022-04-22 | 深圳市拓邦锂电池有限公司 | Lithium ion battery stepped formation method and device |
-
2010
- 2010-01-28 CN CN201010300900A patent/CN101764261A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856590B (en) * | 2012-09-21 | 2014-11-26 | 深圳市美拜电子有限公司 | Forming and capacity grading method of lithium ion secondary battery |
| CN102856590A (en) * | 2012-09-21 | 2013-01-02 | 深圳市美拜电子有限公司 | Forming and capacity grading method of lithium ion secondary battery |
| CN103894350B (en) * | 2014-03-26 | 2016-08-24 | 山东精工电子科技有限公司 | The partial volume screening method for group matching of cylindrical lithium battery |
| CN103894350A (en) * | 2014-03-26 | 2014-07-02 | 山东精工电子科技有限公司 | Capacitance-grading screening and grouping method for cylindrical lithium battery |
| CN104124484A (en) * | 2014-08-08 | 2014-10-29 | 江苏超威电源有限公司 | Vacuum negative pressure type quick-charging method of cadmium-free internal-formation storage battery |
| CN104124484B (en) * | 2014-08-08 | 2016-05-04 | 江苏超威电源有限公司 | Be internalized into battery vacuum negative pressure type fast charge method without cadmium |
| CN105161766A (en) * | 2015-08-05 | 2015-12-16 | 柳州豪祥特科技有限公司 | Filling formation method for power type lithium battery |
| CN105161766B (en) * | 2015-08-05 | 2018-04-10 | 柳州豪祥特科技有限公司 | A kind of fluid injection chemical synthesizing method of power lithium battery |
| CN109216771A (en) * | 2017-06-29 | 2019-01-15 | 青岛恒金源电子科技有限公司 | A kind of partial volume method produced during lithium ion battery |
| CN113241479A (en) * | 2021-04-29 | 2021-08-10 | 合肥国轩高科动力能源有限公司 | High-efficiency formation method of lithium battery |
| CN114188596A (en) * | 2021-11-23 | 2022-03-15 | 郑州比克电子有限责任公司 | Pre-activation method of lithium ion battery |
| CN114188596B (en) * | 2021-11-23 | 2023-09-01 | 郑州比克电子有限责任公司 | Pre-activation method of lithium ion battery |
| CN114388892A (en) * | 2021-12-02 | 2022-04-22 | 深圳市拓邦锂电池有限公司 | Lithium ion battery stepped formation method and device |
| CN114388892B (en) * | 2021-12-02 | 2024-03-29 | 深圳市拓邦锂电池有限公司 | Stepped formation method and equipment for lithium ion battery |
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Open date: 20100630 |