CN106935912A - A kind of compound method for lithium ion battery - Google Patents
A kind of compound method for lithium ion battery Download PDFInfo
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- CN106935912A CN106935912A CN201710142107.3A CN201710142107A CN106935912A CN 106935912 A CN106935912 A CN 106935912A CN 201710142107 A CN201710142107 A CN 201710142107A CN 106935912 A CN106935912 A CN 106935912A
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- battery core
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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
- H01M10/058—Construction or manufacture
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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
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Abstract
The present invention provides a kind of compound method for lithium ion battery, comprises the following steps：1) battery core after sealing is put into and 6 48h is stood in 40 60 DEG C of burn-in chamber；2) battery core after the completion of standing is put into formation cabinet, and chemical conversion temperature is set in the range of 40 70 DEG C；3) battery core in formation cabinet is carried out into constant-current charge using the electric current of 0.03 0.1C, a period of time is stood after being charged to certain electricity, then discharged；4) by step 3) battery core that obtains carries out constant-current charge using the electric current of 0.3 1C, and a period of time is stood after being charged to certain electricity, then discharge；5) by step 4) battery core that obtains carries out constant-current charge using the electric current of 0.5 2C, and a period of time is stood after being charged to certain electricity, then discharge.
Description
【Technical field】
The invention belongs to technical field of lithium ion, more particularly to a kind of compound method for lithium ion battery.
【Background technology】
Lithium ion battery chemical conversion is the process that primary charging is carried out to the battery of new production, and on the one hand its purpose is to remove electricity
Impurity in pond, including moisture content and micro metal impurities, the chemical property of active material in activated batteries；On the other hand it is
The solid electrolyte interface film (SEI films) of stabilization is formed, prevents the solvent in electrolyte from being reacted with graphite, cause battery core to circulate the longevity
Life decay.Good SEI films can greatly improve the chemical property of battery, be conducive to battery multiplying power, cryogenic property and follow
The raising of ring performance.
Two steps are divided into lithium ion battery chemical conversion at present：Low current chemical conversion is carried out first, electric current is typically smaller than 0.1C, make to bear
Pole surface forms the SEI films of uniform and thin densification；Then using high current into electric current is typically not greater than 0.4C, accelerates SEI films
Formation.However, when the current increases, due to the influence of concentration of electrolyte difference polarization, the formation of SEI films can be caused uneven,
Battery core poor-performing.Additionally, it is long the time required to above-mentioned chemical synthesizing method, cause low production efficiency.
【The content of the invention】
The present invention proposes that a kind of production efficiency is high, can lift the compound method for lithium ion battery of product electrical property.
A kind of compound method for lithium ion battery that the present invention is provided, comprises the following steps：
1) battery core after sealing is put into 40-60 DEG C of burn-in chamber and stands 6-48h；
2) battery core after the completion of standing is put into formation cabinet, and chemical conversion temperature is set in the range of 40-70 DEG C；
3) battery core in formation cabinet is carried out into constant-current charge using the electric current of 0.03-0.1C, is stood after being charged to certain electricity
For a period of time, then discharge；
4) by step 3) battery core that obtains carries out constant-current charge using the electric current of 0.3-1C, and one is stood after being charged to certain electricity
The section time, then discharge；
5) by step 4) battery core that obtains carries out constant-current charge using the electric current of 0.5-2C, and one is stood after being charged to certain electricity
The section time, then discharge.
In a preferred embodiment, step 3) in, constant-current charge 10-60min makes the electricity of battery core reach specified appearance
The 60%-90% of amount；Time of repose is 3-10min.
In a preferred embodiment, step 4) in, constant-current charge 10-30min makes the electricity of battery core reach specified appearance
The 60%-90% of amount；Time of repose is 3-10min.
In a preferred embodiment, step 5) in, constant-current charge 5-20min makes the electricity of battery core reach rated capacity
60%-90%；Time of repose is 3-10min.
The compound method for lithium ion battery that the present invention is provided, battery core after sealing is put into the burn-in chamber with higher temperature
Stand；The formation cabinet for placing battery core also keeps temperature environment higher；Size including three charge and discharge cycles and continuous current
It is incremented by successively.The method can not only shorten the chemical conversion time so as to improve production efficiency, and the battery core capacity produced is qualified,
Internal resistance is relatively low, and high rate performance, cryogenic property and cycle performance are more preferable.
【Brief description of the drawings】
Schematic flow sheets of the Fig. 1 for the compound method for lithium ion battery for providing of the invention in one embodiment.
Fig. 2 is the battery core capacity that the battery core obtained using the compound method for lithium ion battery shown in Fig. 1 is obtained with reference examples
Profiles versus.
Fig. 3 is the battery core internal resistance that the battery core obtained using the compound method for lithium ion battery shown in Fig. 1 is obtained with reference examples
Profiles versus.
Fig. 4 is the battery core multiplying power that the battery core obtained using the compound method for lithium ion battery shown in Fig. 1 is obtained with reference examples
Performance comparison.
Fig. 5 is the battery core low temperature that the battery core obtained using the compound method for lithium ion battery shown in Fig. 1 is obtained with reference examples
Performance comparison.
Fig. 6 is that the battery core obtained using the compound method for lithium ion battery shown in Fig. 1 and the battery core that reference examples are obtained are circulated
Performance comparison.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with accompanying drawing and
Specific embodiment, the present invention will be described in further detail.It should be appreciated that the specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
The present invention provides a kind of compound method for lithium ion battery, comprises the following steps：
1) battery core after sealing is put into 40-60 DEG C of burn-in chamber and stands 6-48h；
2) battery core after the completion of standing is put into formation cabinet, and chemical conversion temperature is set in the range of 40-70 DEG C；
3) battery core in formation cabinet is carried out into constant-current charge 10-60min using the electric current of 0.03-0.1C, makes the electricity of battery core
Amount reaches the 60%-90% of rated capacity, is discharged after standing 3-10min；
4) by step 3) battery core that obtains carries out constant-current charge 10-30min using the electric current of 0.3-1C, makes the electricity of battery core
The 60%-90% of rated capacity is reached, is discharged after standing 3-10min；
5) by step 4) battery core that obtains carries out constant-current charge 5-20min using the electric current of 0.5-2C, makes the electricity of battery core
The 60%-90% of rated capacity is reached, is discharged after standing 3-10min.
Fig. 1 is refer to, in one embodiment, the battery core after sealing is put into 45 DEG C of burn-in chamber and is stood 12h；Will be quiet
Battery core after the completion of putting is put into formation cabinet, and chemical conversion temperature is set as 50 DEG C；Battery core in formation cabinet is used the electricity of 0.1C
Stream carries out constant-current charge 20min, is discharged after standing 3min；Then constant-current charge 27min is carried out using the electric current of 0.5C, is stood
Discharged after 10min；Constant-current charge 15min is finally carried out using the electric current of 2C, is discharged after standing 3min.
Further, with existing process as reference examples, it is put into after the battery core after sealing is stood into 48h under normal temperature (25 DEG C)
Formation cabinet；Battery core in formation cabinet is carried out into constant-current charge 2h using the electric current of 0.05C, is discharged after standing 10min；Then use
The electric current of 0.15C carries out constant-current charge 5h, is discharged after standing 5min.
Further, the battery core after embodiment and reference examples chemical conversion being terminated measures voltage after standing 2h, wherein, voltage exists
The battery core of 3.32-3.40V is qualified battery core.For qualified battery core measure they capacity, internal resistance value, at a temperature of 25 DEG C it is different
Voltage and electric discharge when discharge-rate is 1C under capability retention, low temperature (- 20 DEG C) during rate of charge (1C, 2C, 3C and 5C)
The capability retention of amount variation relation, charge-discharge magnification different cycle-indexes when being 3C, as a result respectively such as Fig. 2, Fig. 3, Fig. 4, Fig. 5
And shown in Fig. 6.Comparing result shows：The battery core that the compound method for lithium ion battery is obtained in a specific embodiment with it is right
Compare as usual, with capacity it is big, internal resistance is small, charging conservation rate is high, preferable cryogenic property and cycle performance.
The compound method for lithium ion battery that the present invention is provided, battery core after sealing is put into the burn-in chamber with higher temperature
Stand；The formation cabinet for placing battery core also keeps temperature environment higher；Size including three charge and discharge cycles and continuous current
It is incremented by successively.The method can not only shorten the chemical conversion time so as to improve production efficiency, and the battery core capacity produced is qualified,
Internal resistance is relatively low, and high rate performance, cryogenic property and cycle performance are more preferable.
Presently preferred embodiments of the present invention is the foregoing is only, is to combine specific preferred embodiment to institute of the present invention
The further description of work, it is impossible to assert that specific implementation of the invention is confined to these explanations.It is all it is of the invention spirit and
Any modification, equivalent and improvement for being made within principle etc., should be included within the scope of the present invention.
Claims (4)
1. a kind of compound method for lithium ion battery, it is characterised in that：Comprise the following steps：
1) battery core after sealing is put into 40-60 DEG C of burn-in chamber and stands 6-48h；
2) battery core after the completion of standing is put into formation cabinet, and chemical conversion temperature is set in the range of 40-70 DEG C；
3) battery core in formation cabinet is carried out into constant-current charge using the electric current of 0.03-0.1C, one section is stood after being charged to certain electricity
Time, then discharge；
4) by step 3) battery core that obtains carries out constant-current charge using the electric current of 0.3-1C, it is charged to after certain electricity when standing one section
Between, then discharge；
5) by step 4) battery core that obtains carries out constant-current charge using the electric current of 0.5-2C, it is charged to after certain electricity when standing one section
Between, then discharge.
2. compound method for lithium ion battery as claimed in claim 1, it is characterised in that：Step 3) in, constant-current charge 10-
60min makes the electricity of battery core reach the 60%-90% of rated capacity；Time of repose is 3-10min.
3. compound method for lithium ion battery as claimed in claim 1, it is characterised in that：Step 4) in, constant-current charge 10-
30min makes the electricity of battery core reach the 60%-90% of rated capacity；Time of repose is 3-10min.
4. compound method for lithium ion battery as claimed in claim 1, it is characterised in that：Step 5) in, constant-current charge 5-20min
The electricity of battery core is set to reach the 60%-90% of rated capacity；Time of repose is 3-10min.
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| CN201710142107.3A CN106935912A (en) | 2017-03-10 | 2017-03-10 | A kind of compound method for lithium ion battery |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109411829A (en) * | 2018-10-26 | 2019-03-01 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery chemical synthesis technology and lithium ion battery |
| CN110759383A (en) * | 2019-10-31 | 2020-02-07 | 中国石油大学(华东) | Heteropolyacid crystal, preparation method thereof, secondary battery negative electrode material, secondary battery and electric device |
| CN110767895A (en) * | 2019-10-31 | 2020-02-07 | 中国石油大学(华东) | Secondary battery negative electrode active material, secondary battery negative electrode, secondary battery and activation method thereof |
| CN113054270A (en) * | 2021-03-24 | 2021-06-29 | 骆驼集团新能源电池有限公司 | Soft package lithium ion battery formation process |
| CN114243135A (en) * | 2021-12-16 | 2022-03-25 | 新余赣锋电子有限公司 | Capacity-grading-free electronic cigarette battery and full electrochemical forming method thereof |
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| CN103280600A (en) * | 2013-05-22 | 2013-09-04 | 江苏富朗特新能源有限公司 | Forming process of lithium iron phosphate battery |
| CN103579679A (en) * | 2012-08-09 | 2014-02-12 | 北汽福田汽车股份有限公司 | Formation method of lithium iron phosphate power 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109411829A (en) * | 2018-10-26 | 2019-03-01 | 惠州亿纬锂能股份有限公司 | A kind of lithium ion battery chemical synthesis technology and lithium ion battery |
| CN110759383A (en) * | 2019-10-31 | 2020-02-07 | 中国石油大学(华东) | Heteropolyacid crystal, preparation method thereof, secondary battery negative electrode material, secondary battery and electric device |
| CN110767895A (en) * | 2019-10-31 | 2020-02-07 | 中国石油大学(华东) | Secondary battery negative electrode active material, secondary battery negative electrode, secondary battery and activation method thereof |
| CN110759383B (en) * | 2019-10-31 | 2022-03-22 | 中国石油大学(华东) | Heteropolyacid crystal, preparation method thereof, secondary battery negative electrode material, secondary battery and electric device |
| CN113054270A (en) * | 2021-03-24 | 2021-06-29 | 骆驼集团新能源电池有限公司 | Soft package lithium ion battery formation process |
| CN113054270B (en) * | 2021-03-24 | 2022-11-08 | 骆驼集团新能源电池有限公司 | Soft package lithium ion battery formation process |
| CN114243135A (en) * | 2021-12-16 | 2022-03-25 | 新余赣锋电子有限公司 | Capacity-grading-free electronic cigarette battery and full electrochemical forming method thereof |
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