CN106876812A - Method of charging lithium-ion battery - Google Patents
Method of charging lithium-ion battery Download PDFInfo
- Publication number
- CN106876812A CN106876812A CN201510919888.3A CN201510919888A CN106876812A CN 106876812 A CN106876812 A CN 106876812A CN 201510919888 A CN201510919888 A CN 201510919888A CN 106876812 A CN106876812 A CN 106876812A
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- CN
- China
- Prior art keywords
- battery
- charging
- current
- constant
- capacity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of method of charging lithium-ion battery, comprises the following steps：With electric current Ia to constant-current charging of battery to capacity 2-10%, then stand, it is time ta to stand；Constant-current charge is continued to battery to capacity 40-70% with electric current Ib, is then stood, time of repose is tb；Battery is continued to capacity 80-95% by constant-current charge with electric current Ic, is then stood, time of repose is tc；And with the 100% of constant-voltage charge to battery capacity；Wherein Ib>Ia,Ic.Charging method of the invention effectively reduces temperature rise of the battery core in big multiplying power charging process；Effectively prevent the analysis lithium in charging process；Lifting battery core cyclic reversibility, improves cycle performance.
Description
Technical field
The present invention relates to field of lithium ion battery, more particularly to a kind of lithium ion battery rapid multi-step charging method.
Background technology
The continuous expansion of lithium ion battery operation strategies, uses the requirement of condition also further harsh for it.The thing followed is lithium ion battery row
What industry must be solved, how to lift lithium ion battery circulation requirement at low temperature；Lithium ion battery how to be solved during quick charge, is made
Into possibility influence cycle performance problem of temperature rise turn into significant challenge.
The content of the invention
In view of problems of the prior art, the purpose of the present invention is to solve the shortcomings of the prior art and a kind of rapid multi-step charging method is provided,
While battery design cost is not increased, charged state higher can be in a short time reached, and effectively reduce battery core and charged in big multiplying power
During temperature rise；Effectively prevent the analysis lithium in charging process；Lifting battery core cyclic reversibility, improves cycle performance.
The present invention provides a kind of method of charging lithium-ion battery, comprises the following steps：With electric current Ia to constant-current charging of battery to capacity 2-10%,
Then stand, it is time ta to stand；Constant-current charge is continued to battery to capacity 40-70% with electric current Ib, is then stood, time of repose
It is tb；Battery is continued to capacity 80-95% by constant-current charge with electric current Ic, is then stood, time of repose is tc；And with constant pressure
Charge to the 100% of battery capacity；Wherein Ib>Ia,Ic.
Described electric current Ia ＞ Ic, Ia=Ic or Ic>Ia.
The electric current Ib is 1-5C, and Ia is 0.1-0.7C, and Ic is 0.2-1C.
The electric current Ib is 1.3-2C, and Ia is 0.3-0.5C, and Ic is 0.3-0.7C.
The upper voltage limit of the constant-voltage charge is 4.2-4.5V, and charge cutoff electric current is 0.01-0.1C.
Described time of repose ta, tb, tc are 1 second~20 minutes, and ta, tb, tc can be with identical or different.
The positive pole of the lithium ion battery includes cobalt acid lithium.
Cobalt acid lithium of the positive pole of the lithium ion battery comprising more than 50wt.%.
Method of charging lithium-ion battery of the invention has three below outstanding advantages compared with prior art：
1. temperature rise of the battery core in big multiplying power charging process can be reduced effectively；
2. the analysis lithium in charging process can be prevented effectively；
3. battery core cyclic reversibility can be lifted, cycle performance is improved.
One embodiment of the present invention, charging current Ib can be 1-5C, and Ia can be 0.1-0.7C, and Ic can be 0.2-1C.
It is preferred that Ib can be 1.3-2C, Ia can be 0.3-0.5C, and Ic can be 0.3-0.7C.
One embodiment of the present invention, the upper voltage limit of constant-voltage charge can be 4.2-4.5V, and charge cutoff electric current can be 0.01-0.1C.
Charging current Ia is 0.1-0.7C, because first charged using smaller current Ia, when Ia is less than 0.1C, during charging
Between it is oversize, lose time；When Ia is more than 0.7C, heat production is more.Charging current Ib is 1-5C, because smaller current
Charged using larger current Ib after charging, when Ib is less than 1C, the charging interval is oversize, loses time；When Ib is more than 5C,
The charging interval can not substantially be shortened, heat production and circulation slightly deteriorate.
Charging current Ic is 0.2-1C, because charged using smaller current Ic again after larger current charges, when Ic is less than 0.2C,
Charging interval is oversize, loses time；When Ic is more than 1C, there is analysis lithium risk.
One embodiment of the present invention, selects Ia>Ic, it is possible to reduce analysis lithium risk, improves cycle performance.
Another embodiment of the present invention, selects Ic>Ia, it is possible to reduce heat production in charging process, improves cycle performance.
One embodiment of the present invention, the upper voltage limit of constant-voltage charge is 4.2-4.5V, and charge cutoff electric current is 0.01-0.1C.Cut-off current is selected
It is in order to fully charged and reduction polarizes to select 0.01-0.1C.
Charging modes of the invention are applied to any lithium ion battery, particularly with the battery system containing cobalt acid lithium in positive electrode, because cobalt is sour
The D.C. resistance of lithium is very big under low charging capacity, it is meant that kinetics it is poor, electrode reaction is poorly reversible, cycle performance meet not
Require.Fast and fractional charging method in the present invention, the first step is charged using smaller current Ia, can not only reduce the too fast heat production of battery core
Or heat production is excessive, it is important to be able to increase the invertibity that cobalt acid lithium system is circulated under low charging capacity；Second step, using larger current I
B charges, and that improves battery core fills ability soon；3rd step, is charged using smaller current Ic again, suppresses the analysis lithium problem of battery core.It is this to fill
Method for electrically had both reduced the reaction heat in charging process, the reaction invertibity of lithium ion battery was improved again, so as to improve the service life of battery core.It is right
Use charging method of the invention containing the cobalt acid lithium battery core of gross weight more than 50% is preferably in positive electrode, when cobalt acid lithium content is more than positive pole
When 50%, charging method of the invention makes the charging heat production of battery core and cycle performance have greatly improved, but when cobalt acid lithium content is less than positive pole
When 50% or using other positive electrodes, smaller is improved to battery core charging heat production and cycle performance.
Claims (6)
1. a kind of method of charging lithium-ion battery, it is characterised in that：Comprise the following steps：
With electric current Ia to constant-current charging of battery to capacity 2-10%, then stand, it is time ta to stand；
Constant-current charge is continued to battery to capacity 40-70% with electric current Ib, is then stood, time of repose is tb；
Battery is continued to capacity 80-95% by constant-current charge with electric current Ic, is then stood, time of repose is tc；And with constant-voltage charge to battery
The 100% of capacity；Wherein Ib>Ia,Ic.
2. lithium ion charging method according to claim 1, it is characterised in that：Described electric current Ia ＞ Ic, Ia=Ic or Ic>Ia.
3. lithium ion charging method according to claim 1, it is characterised in that：The electric current Ib is 1-5C, and Ia is 0.1-0.7C, Ic
It is 0.2-1C.
4. charging method according to claim 3, it is characterised in that：The electric current Ib is 1.3-2C, and Ia is 0.3-0.5C, and Ic is
0.3-0.7C。
5. lithium ion charging method according to claim 1, it is characterised in that：The upper voltage limit of the constant-voltage charge is 4.2-4.5V, is charged
Cut-off current is 0.01-0.1C.
6. charging method according to claim 1, it is characterised in that：Described time of repose ta, tb, tc are 1 second~20 minutes,
Ta, tb, tc can be with identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919888.3A CN106876812A (en) | 2015-12-11 | 2015-12-11 | Method of charging lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510919888.3A CN106876812A (en) | 2015-12-11 | 2015-12-11 | Method of charging lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876812A true CN106876812A (en) | 2017-06-20 |
Family
ID=59177333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510919888.3A Pending CN106876812A (en) | 2015-12-11 | 2015-12-11 | Method of charging lithium-ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106876812A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993423A (en) * | 2021-02-19 | 2021-06-18 | 芜湖天弋能源科技有限公司 | Method for improving capacity of lithium ion battery cell module |
-
2015
- 2015-12-11 CN CN201510919888.3A patent/CN106876812A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112993423A (en) * | 2021-02-19 | 2021-06-18 | 芜湖天弋能源科技有限公司 | Method for improving capacity of lithium ion battery cell module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170620 |
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| WD01 | Invention patent application deemed withdrawn after publication |