CN101599561A - A kind of method that improves performance of lithium-ion secondary battery - Google Patents
A kind of method that improves performance of lithium-ion secondary battery Download PDFInfo
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- CN101599561A CN101599561A CNA2009101075131A CN200910107513A CN101599561A CN 101599561 A CN101599561 A CN 101599561A CN A2009101075131 A CNA2009101075131 A CN A2009101075131A CN 200910107513 A CN200910107513 A CN 200910107513A CN 101599561 A CN101599561 A CN 101599561A
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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 discloses a kind of method that improves performance of lithium-ion secondary battery, it comprises the steps: the little electric current constant current constant voltage of lithium ion battery initial charge; To sealing behind the lithium ion battery initial charge, ageing; Lithium ion battery is carried out little electric current constant current to discharge first; Lithium ion battery is carried out big electric current constant current constant voltage to charge for the second time.The method that adopts the present invention to propose; can overcome that electrode protective membrane forms inadequate shortcoming in the lithium ion battery general technology process; can reduce the generation of side reaction; improve the stability of battery chemistries reaction system; and improve battery performance effectively, as battery cycle life, capacity, security performance etc.
Description
Technical field
The present invention relates to lithium rechargeable battery, relate in particular to a kind of method that improves performance of lithium-ion secondary battery.
Background technology
Studies show that lithium ion battery is in the primary charging process, redox reaction has taken place in electrolyte, and its product has formed one deck passivation protection film at electrode surface.This film is present in electrode and solution at the interface as solid electrolyte, electronics is insulated, but allow ion to pass through.The deposition of this film is irreversible, can stop the embedding altogether of solvent and lithium ion after the formation, also can stop the further reaction of electrolyte on electrode simultaneously.So the formation of this diaphragm directly affects every performance of lithium ion battery, the first charge-discharge technology of battery then is one of film formed important factor in order of protection.The first charge-discharge technology that present lithium ion battery manufacturing generally adopts is constant current and charges and discharge.In the existing lithium ion battery technical process, electrode protective membrane forms insufficient, can produce side reaction, the unsteadiness of battery chemistries reaction system, and battery performance is relatively poor.
Summary of the invention
The present invention provides a kind of method that improves performance of lithium-ion secondary battery for solving the problems of the technologies described above, by improving the first charge-discharge technology of battery, more effective formation electrode protective membrane, thereby the performance of raising lithium rechargeable battery.
For this reason, the method for the raising performance of lithium-ion secondary battery that the present invention proposes comprises the steps:
A, little electric current constant current constant voltage initial charge
Adopt the constant current of at least one current value elder generation that lithium ion battery is charged, by the time after battery boosts to a cut-ff voltage, continue charging with this cut-ff voltage constant voltage again;
Sealing, ageing behind b, the battery initial charge
With after the lithium ion battery sealing, carry out high temperature ageing or high temperature ageing after, carry out cell sealing again;
C, lithium ion battery is carried out little electric current constant current discharge first;
D, lithium ion battery is carried out big electric current constant current constant voltage charge for the second time.
Preferred version of the present invention, the electric current of constant-current phase is during initial charge: 0.001C～0.5C, the cut-ff voltage of constant-voltage phase is 3.8～4.1V during initial charge, the time of initial charge is 1～10 hour.
The temperature of high temperature ageing is 30～60 ℃, and the time of high temperature ageing is 0.5～100 hour.
Fang Dian electric current is 0.001C～0.5C first, and cut-ff voltage is 2.75～3.6V.
The electric current of charging is 0.5～5C for the second time, and cut-ff voltage is 4.2V.
Lithium ion battery of the present invention can be liquid lithium ionic cell, colloid lithium ion battery and any lithium rechargeable battery of polymer Li-ion battery.
The method that adopts the present invention to propose; can overcome that electrode protective membrane forms inadequate shortcoming in the lithium ion battery general technology process; can reduce the generation of side reaction; improve the stability of battery chemistries reaction system; and improve battery performance effectively, as battery cycle life, capacity, security performance etc.
Description of drawings
The test curve of Fig. 1 battery cycle life.
Embodiment
The present invention will be further described below in conjunction with specific embodiment and comparative example:
Embodiment: mix the positive and negative electrode material in proportion, evenly be coated on aluminium foil, the Copper Foil respectively and make positive and negative plate.Be cut into suitable dimensions, be wound into electric core, in the battery case of packing into, again with shell and cover plate package sealing with laser with diaphragm paper.After injecting electrolyte from liquid injection hole, be put into and discharge and recharge cashier's office in a shop, with the 0.05C constant current charge to 4.0V, again with 2 hours-initial charge of 4.0V constant voltage charge.Then seal liquid injection hole (also can seal liquid injection hole after the high temperature ageing), 45 ℃ of high temperature ageings 24 hours are discharged to 3.0V-first with the 0.1C constant-current discharge then, charge for the second time to 4.2V-with the 1C constant current charge at last, make 063048 aluminum-shell battery A.
As required, the present invention can also select for use: the electric current of constant-current phase: 0.001C～0.5C during initial charge, this stage is not limited to single electric current one step, also can be divided into by the size of adjusting electric current a plurality of steps (for example: the first step, 0.001C fills 0.5h; In second step, 0.01C fills 0.5h; In the 3rd step, 0.05C fills 2h; In the 4th step, 0.1C fills 6h); The cut-ff voltage of constant-voltage phase is 3.8～4.1V during initial charge, and the time of initial charge is 1～10 hour.The temperature of high temperature ageing is 30～60 ℃, and the time of high temperature ageing is 0.5～100 hour.Fang Dian electric current is 0.001C～0.5C first, and cut-ff voltage is 2.75～3.6V.The electric current of charging is 0.5～5C for the second time, and cut-ff voltage is 4.2V.
Comparative example: after battery injects electrolyte, be put into and discharge and recharge cashier's office in a shop, to 4.0V, then seal liquid injection hole, continue then with the 0.5C constant current charge to make 063048 aluminum-shell battery B to 4.2V with the 0.2C constant current charge.
The result that A, B Battery pack are carried out cycle life test as shown in Figure 1, wherein the B curve is the test curve that adopts the battery that existing technology makes.
From the graph as can be seen, behind employing the present invention, the cycle life of battery has had the raising of certain degree.
The method that adopts the present invention to propose; can overcome that electrode protective membrane forms inadequate shortcoming in the lithium ion battery general technology process; can reduce the generation of side reaction; improve the stability of battery chemistries reaction system; and improve battery performance effectively, as battery cycle life, capacity, security performance etc.
Claims (6)
1, a kind of method that improves performance of lithium-ion secondary battery is characterized in that comprising the steps:
A, little electric current constant current constant voltage initial charge
Adopt the constant current of at least one current value elder generation that lithium ion battery is charged, by the time after battery boosts to a cut-ff voltage, continue charging with this cut-ff voltage constant voltage again;
Sealing, ageing behind b, the battery initial charge
With after the lithium ion battery sealing, carry out high temperature ageing or high temperature ageing after, carry out cell sealing again;
C, lithium ion battery is carried out little electric current constant current discharge first;
D, lithium ion battery is carried out big electric current constant current constant voltage charge for the second time.
2, the method for raising performance of lithium-ion secondary battery according to claim 1, it is characterized in that, the electric current of constant-current phase is during described initial charge: 0.001C～0.5C, and the cut-ff voltage of constant-voltage phase is 3.8～4.1V during initial charge, the time of initial charge is 1～10 hour.
3, the method for raising performance of lithium-ion secondary battery according to claim 2 is characterized in that, the temperature of described high temperature ageing is 30～60 ℃, and the time of high temperature ageing is 0.5～100 hour.
4, the method for raising performance of lithium-ion secondary battery according to claim 3 is characterized in that, the described electric current of discharge first is 0.001C～0.5C, and cut-ff voltage is 2.75～3.6V.
5, the method for raising performance of lithium-ion secondary battery according to claim 4 is characterized in that, the electric current of the described charging second time is 0.5～5C, and cut-ff voltage is 4.2V.
6, the method for raising performance of lithium-ion secondary battery according to claim 5 is characterized in that, described lithium ion battery is liquid lithium ionic cell, colloid lithium ion battery and any lithium rechargeable battery of polymer Li-ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101075131A CN101599561A (en) | 2009-05-22 | 2009-05-22 | A kind of method that improves performance of lithium-ion secondary battery |
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|---|---|---|---|
| CNA2009101075131A CN101599561A (en) | 2009-05-22 | 2009-05-22 | A kind of method that improves performance of lithium-ion secondary battery |
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| CN101599561A true CN101599561A (en) | 2009-12-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151569A (en) * | 2013-03-19 | 2013-06-12 | 奇瑞汽车股份有限公司 | Method for improving cyclical stability of lithium ion battery containing positive material LiNi0.5Mn1.5O4 and lithium ion battery |
| CN103367813A (en) * | 2013-07-23 | 2013-10-23 | 惠州市泰格威电池有限公司 | Formation processing method of lithium manganate battery |
| CN104237798A (en) * | 2014-08-28 | 2014-12-24 | 浙江天能电池江苏新能源有限公司 | Lead storage battery accelerated life detection method |
| CN112713324A (en) * | 2020-12-29 | 2021-04-27 | 惠州亿纬创能电池有限公司 | Formation method for preventing lithium precipitation of negative electrode |
| CN115588825A (en) * | 2022-09-26 | 2023-01-10 | 湖北亿纬动力有限公司 | Formation method of lithium ion secondary battery and lithium ion secondary battery |
-
2009
- 2009-05-22 CN CNA2009101075131A patent/CN101599561A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151569A (en) * | 2013-03-19 | 2013-06-12 | 奇瑞汽车股份有限公司 | Method for improving cyclical stability of lithium ion battery containing positive material LiNi0.5Mn1.5O4 and lithium ion battery |
| CN103151569B (en) * | 2013-03-19 | 2015-07-15 | 奇瑞汽车股份有限公司 | Method for improving cyclical stability of lithium ion battery containing positive material LiNi0.5Mn1.5O4 and lithium ion battery |
| CN103367813A (en) * | 2013-07-23 | 2013-10-23 | 惠州市泰格威电池有限公司 | Formation processing method of lithium manganate battery |
| CN103367813B (en) * | 2013-07-23 | 2015-12-09 | 惠州市泰格威电池有限公司 | A kind of lithium manganate battery formation processing method |
| CN104237798A (en) * | 2014-08-28 | 2014-12-24 | 浙江天能电池江苏新能源有限公司 | Lead storage battery accelerated life detection method |
| CN104237798B (en) * | 2014-08-28 | 2017-04-05 | 浙江天能电池江苏新能源有限公司 | A kind of lead battery accelerated aging detection method |
| CN112713324A (en) * | 2020-12-29 | 2021-04-27 | 惠州亿纬创能电池有限公司 | Formation method for preventing lithium precipitation of negative electrode |
| CN115588825A (en) * | 2022-09-26 | 2023-01-10 | 湖北亿纬动力有限公司 | Formation method of lithium ion secondary battery and lithium ion secondary battery |
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Application publication date: 20091209 |