CN108539277A - A kind of partial volume method of power-type lithium ion battery - Google Patents
A kind of partial volume method of power-type lithium ion battery Download PDFInfo
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- CN108539277A CN108539277A CN201810251289.2A CN201810251289A CN108539277A CN 108539277 A CN108539277 A CN 108539277A CN 201810251289 A CN201810251289 A CN 201810251289A CN 108539277 A CN108539277 A CN 108539277A
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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
Abstract
The present invention relates to a kind of partial volume methods of power-type lithium ion battery, include the first constant-current charging phase, charge and discharge cycles stage successively by step, second constant-current charging phase, constant-current discharge stage, the charging current of wherein described first constant-current charging phase is 0.1C~0.7C, the charging current of second constant-current charging phase is 0.5~0.8C, blanking voltage is 3.65V, and the discharge current of cut-off current 0.02C, the constant-current discharge stage are 0.5~0.8C.The partial volume method of power-type lithium ion battery of the present invention takes short, it is simple for process, the SEI films formed in chemical conversion period can be stablized as far as possible within the limited time, by the battery of partial volume technique partial volume of the present invention, it is not much different with battery made from former partial volume technique on capacity retention ratio in discharge capacity.Therefore, production production capacity is effectively raised under the premise of not losing battery performance using the partial volume method.
Description
Technical field
The present invention relates to lithium ion batteries to manufacture field, and in particular to a kind of partial volume side of power-type lithium ion battery
Method.
Background technology
With the rapid development of social economy, it is continuously increased as the Fossil fuel consumption amount of non-renewable energy resources, gives ring
Border, which is brought, to be seriously affected so that countries in the world are dedicated to the scientific research and development of new energy and the relevant technologies.Wherein, secondary cell is high
Effect, cleanliness without any pollution can effectively reduce the consumption of fuel as the power or accessory power supply of internal-combustion engine vehicle.
Compared to traditional lead accumulator and nickel metal hydride, lithium ion battery is in cycle life, energy density, power density and ring
It is with the obvious advantage in the close friend's performance of border.Although there is certain gap with fuel cell in energy density, fuel cell is high
It is difficult that the production technology of manufacturing cost and complexity achieves commercialization.Therefore, lithium ion battery is the following electronic vapour
The ideal power power supply of vehicle and hybrid-power battery.
Using LiFePO 4 as positive electrode, power-type lithium ion battery of the graphite as negative material, although in energy
Not as good as with ternary material in density and cycle life（Ni, Mn and Co）For the lithium ion battery of anode, but its security performance, original
It is with the obvious advantage in material cost, manufacturing process maturity.Therefore, rely on its higher cost performance, LiFePO 4 is positive electrode
Lithium ion battery unshakable status can be occupied in lithium ion battery market.Generally, by the lithium ion of formation process
The state-of-charge of battery（SOC）It is 28%, needs the charge and discharge cycles in partial volume process fully charged laggard line number time.Partial volume process
Purpose be：So that the solid electrolyte membrane that cathode graphite surface generates during chemical conversion is more stablized（SEI）, and to divide
Hold the standard that the discharge capacity of battery in process is packed as PACK.In general, this process needs the charge and discharge carried out for several times to follow
Ring is higher than formation process on activity time and energy consumption, and the cost during entire lithium ion is manufactured accounts for relatively high.Cause
This, before the full electric discharge of partial volume process, carry out for several times it is shallow put it is shallow fill cycle, not only contribute to the stabilization of SEI films, more can be with
Shorten the time that partial volume process is consumed, production capacity can be improved while reducing energy consumption.
The partial volume method used at present takes about 8h, is filled using two steps and is put deeply deeply, is unfavorable for generating under highly charged state
It is more to stablize fine and close organo-lithium compound（ROCO2Li）.
Invention content
The purpose of the present invention is to provide a kind of partial volume method of power-type lithium ion battery, the partial volume time can shorten 2-
3h can not only improve production capacity, while can also improve the cycle performance of battery.
To achieve the above object, present invention employs following technical schemes：
A kind of partial volume method of power-type lithium ion battery includes the first constant-current charging phase, charge and discharge cycles successively by step
Stage, the second constant-current charging phase, constant-current discharge stage, wherein the charging current of first constant-current charging phase be 0.1C~
The charging current of 0.7C, the second constant-current charging phase are 0.5~0.8C, blanking voltage 3.65V, cut-off current 0.02C, institute
The discharge current for stating the constant-current discharge stage is 0.5~0.8C.
Further, the blanking voltage of first charging stage is 3.65V, cut-off current 0.02C.
Further, the charging and discharging currents in the charge and discharge cycles stage are 0.3~0.8C, and charge and discharge number is 2~5
Secondary, the limitation time during charging and discharging is 10min~40min.
Further, the limitation time of first charging stage is 60~180min.
Further, the cut-off current in the constant-current discharge stage is 2.0~2.5V, and time restriction is 110~130min.
Further, the limitation time of second constant-current charging phase is 30~60min.
Further, the positive electrode of the power-type lithium ion battery is LiFePO 4, and negative material is artificial stone
Ink.
As shown from the above technical solution, a kind of partial volume method of power-type lithium ion battery of the present invention takes short,
It is simple for process, the SEI films formed in chemical conversion period can be stablized as far as possible within the limited time, process is of the present invention
The battery of partial volume technique partial volume is not much different on capacity retention ratio with battery made from former partial volume technique in discharge capacity.Cause
This effectively raises production production capacity using the partial volume method under the premise of not losing battery performance.
Description of the drawings
Fig. 1 is current potential-Capacity Plan of the partial volume method and former partial volume method of the present invention；
Fig. 2 is the embodiment of the present invention 5 and comparative example capacity retention ratio curve comparison figure；
Fig. 3 is the embodiment of the present invention 5 and comparative example circulation volume curve comparison figure.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
The partial volume method of the power-type lithium ion battery of the present invention includes the first constant-current charging phase, charge and discharge cycles rank successively
Section, the second constant-current charging phase, constant-current discharge stage, wherein the charging current of first constant-current charging phase be 0.1C~
The charging current of 0.7C, the second constant-current charging phase are 0.5~0.8C, blanking voltage 3.65V, cut-off current 0.02C, institute
The discharge current for stating the constant-current discharge stage is 0.5~0.8C.
Below using LiFePO 4 as positive electrode, graphite is the power type ferrous phosphate lithium battery of negative material, standard
Capacity is 28.5Ah, 27 DEG C ± 3 DEG C of the environment temperature during partial volume, after being manufactured according to lithium ion battery routine production process
Carry out partial volume.
Embodiment 1
Lithium ion battery after being sealed to chemical conversion, carries out partial volume at room temperature, the specific steps are：
（1）It carried out for the first charging stage, constant-current charge is carried out with the electric current of 0.1C, the charging time is 60 min, blanking voltage
3min is shelved for 3.65V, cut-off current 0.02C；
（2）2 repetition charge and discharge cycles are carried out with the electric current of 0.3C, it is 30min to discharge identical as the time of charging, each time
Battery shelves 1min after electric discharge or charging；
（3）Constant-current constant-voltage charging, time upper limit 60min, blanking voltage 3.65V, cut-off current are carried out with the electric current of 0.6C
For 0.02C, 3min is shelved；
（4）Constant-current discharge is carried out with the electric current of 0.5C, the limitation time is 110min, blanking voltage 2.0V.
Embodiment 2
（1）It carried out for the first charging stage, constant-current charge is carried out with the electric current of 0.7C, the charging time is 180 min, blanking voltage
2min is shelved for 3.65V, cut-off current 0.02C；
（2）5 repetition charge and discharge cycles are carried out with the electric current of 0.8C, it is 40min to discharge identical as the time of charging, each time
Battery shelves 1min after electric discharge or charging；
（3）Constant-current constant-voltage charging, time upper limit 60min, blanking voltage 3.65V, cut-off current are carried out with the electric current of 0.8C
For 0.02C, 3min is shelved；
（4）Constant-current discharge is carried out with the electric current of 0.8C, the limitation time is 130min, blanking voltage 2.5V.
Embodiment 3
（1）It carried out for the first charging stage, constant-current charge is carried out with the electric current of 0.2C, the charging time is 150 min, blanking voltage
3min is shelved for 3.65V, cut-off current 0.02C；
（2）3 repetition charge and discharge cycles are carried out with the electric current of 0.7C, it is 25min to discharge identical as the time of charging, each time
Battery shelves 1min after electric discharge or charging；
（3）Constant-current constant-voltage charging, time upper limit 50min, blanking voltage 3.65V, cut-off current are carried out with the electric current of 0.7C
For 0.02C, 3min is shelved；
（4）Constant-current discharge is carried out with the electric current of 0.6C, the limitation time is 110min, blanking voltage 2.0V.
Embodiment 4
（1）It carried out for the first charging stage, constant-current charge is carried out with the electric current of 0.3C, the charging time is 60 min, blanking voltage
3min is shelved for 3.65V, cut-off current 0.02C；
（2）3 repetition charge and discharge cycles are carried out with the electric current of 0.8C, it is 20min to discharge identical as the time of charging, each time
Battery shelves 1min after electric discharge or charging；
（3）Constant-current constant-voltage charging, time upper limit 45min, blanking voltage 3.65V, cut-off current are carried out with the electric current of 0.8C
For 0.02C, 3min is shelved；
（4）Constant-current discharge is carried out with the electric current of 0.6C, the limitation time is 110min, blanking voltage 2.0V.
Embodiment 5
（1）It carried out for the first charging stage, constant-current charge is carried out with the electric current of 0.2C, the charging time is 150 min, blanking voltage
3min is shelved for 3.65V, cut-off current 0.02C；
（2）3 repetition charge and discharge cycles are carried out with the electric current of 0.6C, it is 15min to discharge identical as the time of charging, each time
Battery shelves 1min after electric discharge or charging；
（3）Constant-current constant-voltage charging, time upper limit 60min, blanking voltage 3.65V, cut-off current are carried out with the electric current of 0.6C
For 0.02C, 3min is shelved；
（4）Constant-current discharge is carried out with the electric current of 0.6C, the limitation time is 110min, blanking voltage 2.0V.
Comparative example：
（1）It carrying out for the first charging stage, the electric current of 0.2C carries out constant-current charge, time 180min, and limitation voltage is 3.65V,
Shelve 3min；
（2）With the current discharge of 0.6C, time restriction 70min, blanking voltage 2.0V shelve 3min.
（3）With the electric current constant-current constant-voltage charging of 0.6C, time restriction 130min, blanking voltage 3.65V, cut-off current
For 0.02C, 3min is shelved.
（4）With the electric current constant-current discharge of 0.6C, time restriction 110min, blanking voltage 2.0V.
It is compared by the attached drawing of above example 5 and comparative example, embodiment 5 and comparative example partial volume take respectively about 5.5h
And 8.0h.At room temperature with the rate loop of 1C 400 weeks after, as shown in Figures 2 and 3, the capacity retention ratio of embodiment 5 is
The capacity retention ratio of 92.21%, capacity 25.35Ah, comparative example are 96.02%, capacity 26.05Ah.Therefore, using the present invention
Disclosed partial volume method not only shortens partial volume required time but also improves the cyclical stability of battery core.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (7)
1. a kind of partial volume method of power-type lithium ion battery, it is characterised in that：Include the first constant-current charge rank successively by step
Section, charge and discharge cycles stage, the second constant-current charging phase, constant-current discharge stage, wherein first constant-current charging phase fills
Electric current is 0.1C~0.7C, and the charging current of the second constant-current charging phase is 0.5~0.8C, blanking voltage 3.65V, cut-off
Electric current is 0.02C, and the discharge current in the constant-current discharge stage is 0.5~0.8C.
2. the partial volume method of power-type lithium ion battery according to claim 1, it is characterised in that：The first charging rank
The blanking voltage of section is 3.65V, cut-off current 0.02C.
3. the partial volume method of power-type lithium ion battery according to claim 1, it is characterised in that：The charge and discharge cycles
The charging and discharging currents in stage are 0.3~0.8C, and charge and discharge number is 2~5 times, and the limitation time during charging and discharging is
10min~40min.
4. the partial volume method of power-type lithium ion battery according to claim 1 or 2, it is characterised in that：Described first fills
The limitation time in electric stage is 60~180min.
5. the partial volume method of power-type lithium ion battery according to claim 1, it is characterised in that：The constant-current discharge rank
The cut-off current of section is 2.0~2.5V, and time restriction is 110~130min.
6. the partial volume method of power-type lithium ion battery according to claim 1, it is characterised in that：Second constant current is filled
The limitation time in electric stage is 30~60min.
7. the partial volume method of power-type lithium ion battery according to claim 1, it is characterised in that：The power type lithium from
The positive electrode of sub- battery is LiFePO 4, and negative material is artificial graphite.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109786874A (en) * | 2018-12-26 | 2019-05-21 | 江苏春兰清洁能源研究院有限公司 | A kind of partial volume method of lithium ion battery |
| CN109818095A (en) * | 2019-04-03 | 2019-05-28 | 湖北融通高科先进材料有限公司 | Charge and discharge preprocess method and battery of a kind of battery and preparation method thereof |
| CN110707363A (en) * | 2019-08-28 | 2020-01-17 | 惠州锂威新能源科技有限公司 | Method for improving liquid retention capacity of soft-packaged battery cell |
| CN110854458A (en) * | 2019-11-07 | 2020-02-28 | 河南电池研究院有限公司 | Formation method of high-voltage soft package lithium ion battery |
| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN112526370A (en) * | 2020-11-10 | 2021-03-19 | 深圳市拓邦锂电池有限公司 | Voltage testing method of three-electrode lithium ion battery |
| CN112736309A (en) * | 2020-12-25 | 2021-04-30 | 南京国轩电池有限公司 | Method for solving abnormal K value after capacity grading of power lithium ion reworked battery |
| CN112820964A (en) * | 2021-01-25 | 2021-05-18 | 江西安驰新能源科技有限公司 | Aging and capacity grading method for lithium ion battery |
| CN113131024A (en) * | 2021-04-21 | 2021-07-16 | 昆山宝创新能源科技有限公司 | Capacity grading method and charging management method for 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109786874A (en) * | 2018-12-26 | 2019-05-21 | 江苏春兰清洁能源研究院有限公司 | A kind of partial volume method of lithium ion battery |
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| CN110911757A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN110911757B (en) * | 2019-10-25 | 2020-11-10 | 合肥国轩高科动力能源有限公司 | Safe capacity grading method for ternary lithium battery |
| CN110854458B (en) * | 2019-11-07 | 2021-10-22 | 河南电池研究院有限公司 | Formation method of high-voltage soft package lithium ion battery |
| CN110854458A (en) * | 2019-11-07 | 2020-02-28 | 河南电池研究院有限公司 | Formation method of high-voltage soft package lithium ion battery |
| CN112526370A (en) * | 2020-11-10 | 2021-03-19 | 深圳市拓邦锂电池有限公司 | Voltage testing method of three-electrode lithium ion battery |
| CN112526370B (en) * | 2020-11-10 | 2022-07-29 | 深圳市拓邦锂电池有限公司 | Voltage testing method of three-electrode lithium ion battery |
| CN112736309A (en) * | 2020-12-25 | 2021-04-30 | 南京国轩电池有限公司 | Method for solving abnormal K value after capacity grading of power lithium ion reworked battery |
| CN112736309B (en) * | 2020-12-25 | 2023-12-08 | 南京国轩电池有限公司 | Method for solving abnormal K value of power lithium ion reworked battery after capacity division |
| CN112820964A (en) * | 2021-01-25 | 2021-05-18 | 江西安驰新能源科技有限公司 | Aging and capacity grading method for lithium ion battery |
| CN113131024A (en) * | 2021-04-21 | 2021-07-16 | 昆山宝创新能源科技有限公司 | Capacity grading method and charging management method for 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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