CN107871910A - Method of charging lithium-ion battery - Google Patents
Method of charging lithium-ion battery Download PDFInfo
- Publication number
- CN107871910A CN107871910A CN201610857086.9A CN201610857086A CN107871910A CN 107871910 A CN107871910 A CN 107871910A CN 201610857086 A CN201610857086 A CN 201610857086A CN 107871910 A CN107871910 A CN 107871910A
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- Prior art keywords
- battery
- charging
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- electric current
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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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (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, stand as time ta；Constant-current charge is continued to capacity 40 70% to battery with electric current Ib, then stood, time of repose tb；Battery is continued to capacity 80 95% by constant-current charge with electric current Ic, then stood, time of repose tc；And 100% with constant-voltage charge to battery capacity；Wherein Ib>Ia,Ic.The charging method of the present invention effectively reduces temperature rise of the battery core in big multiplying power charging process；Effectively prevent the analysis lithium in charging process；Battery core cyclic reversibility is lifted, 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, it is also further harsh with the requirement of condition for it.Thereupon
Be that lithium ion battery industry must solve, how to lift the circulation requirement of lithium ion battery at low temperature；How lithium is solved
Ion battery during quick charge, caused by may influence the problem of temperature rise of cycle performance and 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 providing a kind of
Rapid multi-step charging method, while battery design cost is not increased, higher charged state can be reached in a short time,
And effectively reduce temperature rise of the battery core in big multiplying power charging process；Effectively prevent the analysis lithium in charging process；Lifting battery core is followed
Ring invertibity, improve 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, stand as time ta；Constant-current charge is continued to capacity 40-70% to battery with electric current Ib, so
After stand, time of repose tb；Battery is continued to capacity 80-95% by constant-current charge with electric current Ic, then stood, time of repose
For tc；And 100% with constant-voltage charge to battery capacity；Wherein Ib>Ia,Ic.
Electric current Ia ＞ Ic, Ia=Ic or the Ic>Ia.
The electric current Ib is 1-5C, Ia 0.1-0.7C, Ic 0.2-1C.
The electric current Ib is 1.3-2C, Ia 0.3-0.5C, Ic 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.
The positive pole of the lithium ion battery includes more than 50wt.% cobalt acid lithium.
The method of charging lithium-ion battery of the present invention has following three outstanding advantages compared with prior art：
1. it can effectively reduce temperature rise of the battery core in big multiplying power charging process；
2. it can effectively prevent the analysis lithium in charging process；
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 with
For 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, charging
Time is oversize, loses time；When Ia is more than 0.7C, heat production is more.Charging current Ib is 1-5C, because smaller current fills
Charged after electricity using larger current Ib, when Ib is less than 1C, the charging interval is oversize, loses time；When Ib is more than 5C, it is impossible to bright
Aobvious to shorten the charging interval, heat production and circulation slightly deteriorate.
Charging current Ic is 0.2-1C, because charged after larger current charging using smaller current Ic, when Ic is small again
When 0.2C, the charging interval is oversize, loses time；When Ic is more than 1C, there is analysis lithium risk.
One embodiment of the present invention, select Ia>Ic, it is possible to reduce analysis lithium risk, improve cycle performance.
Another embodiment of the present invention, select Ic>Ia, it is possible to reduce heat production in charging process, improve 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 selection 0.01-0.1C is for fully charged and reduction polarization.
The charging modes of the present invention are applied to any lithium ion battery, particularly with the electricity containing cobalt acid lithium in positive electrode
Pond body system, because the D.C. resistance of cobalt acid lithium is very big under low charging capacity, it is meant that kinetics it is poor, electrode reaction
Poorly reversible, cycle performance can not meet requirement.Fast and fractional charging method in the present invention, the first step use smaller current Ia
Charging, 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 cobalt acid lithium system is held in low charging
The invertibity of the lower circulation of amount；Second step, charged using larger current Ib, improve the fast charge ability of battery core；3rd step, again using compared with
Low current Ic charges, and suppresses the analysis lithium problem of battery core.This charging method had both reduced the reaction heat in charging process, improved again
The reaction invertibity of lithium ion battery, so as to improve the service life of battery core.For in positive electrode contain gross weight 50% with
The upper cobalt acid lithium battery core charging method preferably with the present invention, when cobalt acid lithium content is more than the 50% of positive pole, of the invention fills
Method for electrically makes the charging heat production of battery core and cycle performance have greatly improved, but when cobalt acid lithium content is less than the 50% of positive pole
Or during using other positive electrodes, battery core charging heat production and cycle performance are improved smaller.
Claims (6)
- A kind of 1. 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, stand as time ta；Constant-current charge is continued to capacity 40-70% to battery with electric current Ib, then stood, time of repose tb；Battery is continued to capacity 80-95% by constant-current charge with electric current Ic, then stood, time of repose tc；And with constant pressure Charge to the 100% of battery capacity；Wherein Ib>Ia,Ic.
- 2. lithium ion charging method according to claim 1, it is characterised in that：Electric current Ia ＞ Ic, Ia=Ic or the Ic> Ia。
- 3. lithium ion charging method according to claim 1, it is characterised in that：The electric current Ib is 1-5C, Ia 0.1- 0.7C, Ic 0.2-1C.
- 4. charging method according to claim 3, it is characterised in that：The electric current Ib is 1.3-2C, Ia 0.3-0.5C, 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 charge cutoff electric 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 points Clock, ta, tb, tc can be with identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857086.9A CN107871910A (en) | 2016-09-27 | 2016-09-27 | Method of charging lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857086.9A CN107871910A (en) | 2016-09-27 | 2016-09-27 | Method of charging lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107871910A true CN107871910A (en) | 2018-04-03 |
Family
ID=61761103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610857086.9A Pending CN107871910A (en) | 2016-09-27 | 2016-09-27 | Method of charging lithium-ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107871910A (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 |
-
2016
- 2016-09-27 CN CN201610857086.9A patent/CN107871910A/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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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180403 |
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| WD01 | Invention patent application deemed withdrawn after publication |