CN106711508B - A kind of partial volume method of high-voltage lithium ion battery - Google Patents
A kind of partial volume method of high-voltage lithium ion battery Download PDFInfo
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- CN106711508B CN106711508B CN201611076666.0A CN201611076666A CN106711508B CN 106711508 B CN106711508 B CN 106711508B CN 201611076666 A CN201611076666 A CN 201611076666A CN 106711508 B CN106711508 B CN 106711508B
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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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- 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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- 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
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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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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of partial volume methods of high-voltage lithium ion battery, belong to lithium ion battery manufacture technology field.Partial volume method of the present invention successively includes the first charging stage, discharge regime, the second charging stage and third charging stage by step, wherein the charging current of the first charging stage is 0.02~0.5C, blanking voltage is 4.0~4.2V, the charging current of second charging stage is 0.5~1.0C, blanking voltage is 4.0~4.2V, and the charging current of third charging stage is 0.02~0.5C, blanking voltage is 4.21~4.23V.This method is relatively easy, and benefit electricity caused by can eliminating due to grading system poor contact of contacts is insufficient, remains to reach 4.18V or more by cell voltage of the lithium ion battery of partial volume method processing after aging.
Description
Technical field
The present invention relates to lithium ion battery manufacture technology fields, and in particular to a kind of partial volume side of high-voltage lithium ion battery
Method.
Background technique
Important component of the lithium ion battery as new energy field, it has also become the new heat of one of global economic development
Point, for traditional lead-acid battery and ni-mh, nickel-cadmium cell, the specific capacity of lithium ion battery is high, have extended cycle life,
It has a safety feature, it is environmentally friendly, gradually replace the batteries such as lead-acid battery and ni-mh, ni-Cd, is widely used in mobile phone, pen
Remember this and electric car etc., with the rapid development of these industries, the production of lithium ion battery and demand also can be with days
It is all to increase, have a vast market space.In the fabrication process, finished product lithium ion battery is being put in storage or is going out existing lithium ion battery
It will do it partial volume before goods, mend the electric stage.Currently, it is to fill battery constant current constant voltage that the partial volume of traditional lithium-ion battery, which mends method for electrically,
Electricity arrives 3.9V-4.0V, makes the lithium ion battery control of product in 3.8V-3.95V, and the voltage of this state is more stable and safe,
However in the actual production process, due to factors such as cabinet point exception or battery poor contacts, cause empty in battery charge and discharge process
Press it is larger, to cause partial volume is inaccurate, mends electricity to mend the problems such as discontented and battery consistency is poor.In response to this problem, weight is generallyd use
The method of new cabinet up and down carries out weight partial volume to bad battery core, this has resulted in the complexity of production process, has reduced production efficiency
And product qualified rate, the high-voltage lithium ion battery product for reaching 4.18V or more is required especially for battery shipment voltage, it is existing
It is even more the requirement for being difficult to meet high efficiency production that conventional partial volume, which mends method for electrically,.
Summary of the invention
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of partial volume sides of high-voltage lithium ion battery
Method, this method is relatively easy, and benefit electricity caused by can eliminating due to grading system poor contact of contacts is insufficient, by the partial volume method
Cell voltage of the lithium ion battery of processing after aging remains to reach 4.18V or more.
To solve the above problems, the technical solution adopted in the present invention is as follows:
A kind of partial volume method of high-voltage lithium ion battery, successively includes the first charging stage, discharge regime, second by step
Charging stage and third charging stage, wherein the charging current of the first charging stage is 0.02~0.5C, blanking voltage be 4.0~
4.2V, the charging current of the second charging stage is 0.5~1.0C, blanking voltage is 4.0~4.2V, the charging of third charging stage
Electric current is 0.02~0.5C, blanking voltage is 4.21~4.23V.
Preferably, the discharge current of the discharge regime is 0.02~0.5C, blanking voltage is 2.8~3.5V.
Preferably, the charging current of first charging stage is 0.5C, blanking voltage 4.2V, cut-off current are
0.02C, time restriction are 90~150min.
Preferably, the charging current of second charging stage is 0.5C, blanking voltage 4.2V, cut-off current are
0.02C, time restriction are 180~250min.
Preferably, the third charging stage, specific step is as follows: first to fill under electric current 0.02~0.5C constant current constant voltage
Electricity stands 60min to 4.21V, cut-off current 0.02C；Again to charge to 4.22V under electric current 0.02~0.5C constant current constant voltage,
Cut-off current is 0.02C, stands 60min；First to charge to 4.23V under electric current 0.02~0.5C constant current constant voltage, cut-off current is
0.02C。
As a preferred embodiment of the present invention, specific step is as follows for partial volume method of the present invention:
A, the first charging stage: the battery for chemical conversion of learning from else's experience, to charge to 4.2V, cut-off current under electric current 0.5C constant current constant voltage
For 0.02C, time restriction 130min, 5min is stood；
B, discharge regime: to be discharged to 30V, time restriction 130min under electric current 05C constant current constant voltage, 5min is stood；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C, time limit under electric current 0.5C constant current constant voltage
It is made as 200min, stands 60min；
D, the third charging stage: first to charge to 4.21V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min, stands 60min；Again to charge to 4.22V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min, stands 60min；First to charge to 4.23V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min；
Obtain the battery of partial volume completion.
Compared with prior art, the beneficial effects of the present invention are:
The partial volume method of high-voltage lithium ion battery of the present invention is relatively easy, can eliminate because grading system contact contacts
It is bad and caused by mend that electricity is insufficient, remain to reach by cell voltage of the lithium ion battery of partial volume method processing after aging
To 4.18V or more, benefit electricity caused by can eliminating due to grading system poor contact of contacts is insufficient.Lithium ion battery is by the present invention
Partial volume method partial volume mend electricity after so that the voltage of battery keeps more stable, decay very slow, cell voltage is also after aging 3 days
It may remain in 4.18V or more, improve production qualification rate, meet the shipment demand to high-voltage lithium ion battery.
Detailed description of the invention
Fig. 1 is using high-voltage lithium ion battery made from partial volume method of the present invention and using conventional partial volume method
Voltage-contrast figure of the battery obtained after aging.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
A kind of partial volume method of high-voltage lithium ion battery, successively includes the first charging stage, discharge regime, second by step
Charging stage and third charging stage, wherein the charging current of the first charging stage is 0.02~0.5C, blanking voltage be 4.0~
4.2V, the charging current of the second charging stage is 0.5~1.0C, blanking voltage is 4.0~4.2V, the charging of third charging stage
Electric current is 0.02~0.5C, blanking voltage is 4.21~4.23V.
Preferably, the discharge current of the discharge regime is 0.02~0.5C, blanking voltage is 2.8~3.5V.
Preferably, the charging current of first charging stage is 0.5C, blanking voltage 4.2V, cut-off current are
0.02C, time restriction are 90~150min.
Preferably, the charging current of second charging stage is 0.5C, blanking voltage 4.2V, cut-off current are
0.02C, time restriction are 180~250min.
Preferably, the third charging stage, specific step is as follows: first to fill under electric current 0.02~0.5C constant current constant voltage
Electricity stands 60min to 4.21V, cut-off current 0.02C；Again to charge to 4.22V under electric current 0.02~0.5C constant current constant voltage,
Cut-off current is 0.02C, stands 60min；First to charge to 4.23V under electric current 0.02~0.5C constant current constant voltage, cut-off current is
0.02C。
Embodiment 1:
A kind of partial volume method of high-voltage lithium ion battery, the specific steps of which are as follows:
A, the first charging stage: the battery for chemical conversion of learning from else's experience, to charge to 4.2V, cut-off current under electric current 0.5C constant current constant voltage
For 0.02C, time restriction 130min, 5min is stood；
B, discharge regime: to be discharged to 3.0V, time restriction 130min under electric current 0.5C constant current, 5min is stood；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C, time limit under electric current 0.5C constant current constant voltage
It is made as 200min, stands 60min；
D, the third charging stage: first to charge to 4.21V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min, stands 60min；Again to charge to 4.22V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min, stands 60min；First to charge to 4.23V, cut-off current 0.02C, time under electric current 0.5C constant current constant voltage
It is limited to 60min；
Obtain the battery of partial volume completion.
Embodiment 2:
A kind of partial volume method of high-voltage lithium ion battery, the specific steps of which are as follows:
A, the first charging stage: the battery for chemical conversion of learning from else's experience, to charge to 4.0V, cut-off electricity under electric current 0.05C constant current constant voltage
Stream is 0.02C, time restriction 150min, stands 5min；
B, discharge regime: to be discharged to 3.0V, time restriction 150min under electric current 0.05C constant current, 5min is stood；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C, time limit under electric current 1.0C constant current constant voltage
It is made as 180min, stands 60min；
D, the third charging stage: first to charge to 4.21V under electric current 0.05C constant current constant voltage, cut-off current 0.02C, when
Between be limited to 120min, stand 60min；Again to charge to 4.22V under electric current 0.5C constant current constant voltage, cut-off current 0.02C, when
Between be limited to 60min, stand 60min；First to charge to 4.23V under electric current 0.05C constant current constant voltage, cut-off current 0.02C, when
Between be limited to 120min；
Obtain the battery of partial volume completion.
Embodiment 3:
A kind of partial volume method of high-voltage lithium ion battery, the specific steps of which are as follows:
A, the first charging stage: the battery for chemical conversion of learning from else's experience, to charge to 4.2V, cut-off electricity under electric current 0.05C constant current constant voltage
Stream is 0.02C, time restriction 150min, stands 5min；
B, discharge regime: to be discharged to 3.0V, time restriction 180min under electric current 0.05C constant current, 5min is stood；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C, time limit under electric current 0.5C constant current constant voltage
It is made as 200min, stands 60min；
D, the third charging stage: first to charge to 4.21V under electric current 0.05C constant current constant voltage, cut-off current 0.02C, when
Between be limited to 120min, stand 60min；Again to charge to 4.22V, cut-off current 0.02C under electric current 0.05C constant current constant voltage,
Time restriction is 120min, stands 60min；First to charge to 4.23V, cut-off current 0.02C under electric current 0.5C constant current constant voltage,
Time restriction is 60min；
Obtain the battery of partial volume completion.
Comparative example:
A, the first charging stage: taking the battery being melted into, with electric current 0.5C constant-current constant-voltage charging to 4.20V, cut-off current
0.02C, time restriction 130min stand 5min；
B, discharge regime: with electric current 0.5C constant-current discharge to 3.0V, time restriction 130min stands 5min；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C, time limit under electric current 0.5C constant current constant voltage
200min processed obtains the battery of partial volume completion.
Lithium ion battery is made respectively by the partial volume method of embodiment 1 and the partial volume method of above-mentioned comparative example, it is random respectively
Sample drawn 200, two groups of samples aging 3 days and are tested into the voltage of battery under identical technique, as a result as shown in Figure 1.
As shown in Figure 1, by 4.18V or more is still reached after the average voltage of lithium ion battery obtained by embodiment 13 days, it is higher than comparison
Group average voltage, it can be seen that, through battery made from partial volume method of the invention can meet well to high pressure lithium from
The shipment demand of sub- battery.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (5)
1. a kind of partial volume method of high-voltage lithium ion battery, it is characterised in that: successively include the first charging stage, electric discharge by step
Stage, the second charging stage and third charging stage, wherein the charging current of the first charging stage is 0.02~0.5C, cut-off electricity
Pressure is 4.0~4.2V, and the charging current of the second charging stage is 0.5~1.0C, blanking voltage is 4.0~4.2V, third charging
The charging current in stage is 0.02~0.5C, blanking voltage is 4.21~4.23V；The specific steps of the third charging stage are such as
Under: first to charge to 4.21V, cut-off current 0.02C under electric current 0.02~0.5C constant current constant voltage, stand 60min；Again with electric current
4.22V, cut-off current 0.02C are charged under 0.02~0.5C constant current constant voltage, stand 60min；First with 0.02~0.5C of electric current
4.23V, cut-off current 0.02C are charged under constant current constant voltage.
2. partial volume method according to claim 1, it is characterised in that: the discharge current of the discharge regime be 0.02~
0.5C, blanking voltage are 2.8~3.5V.
3. partial volume method according to claim 1, it is characterised in that: the charging current of first charging stage is
0.5C, blanking voltage 4.2V, cut-off current 0.02C, time restriction are 90~150min.
4. partial volume method according to claim 1, it is characterised in that: the charging current of second charging stage is
0.5C, blanking voltage 4.2V, cut-off current 0.02C, time restriction are 180~250min.
5. partial volume method according to claim 1, it is characterised in that: specific step is as follows:
A, the first charging stage: the battery for chemical conversion of learning from else's experience, to charge to 4.2V under electric current 0.5C constant current constant voltage, cut-off current is
0.02C, time restriction 130min stand 5min；
B, discharge regime: to be discharged to 3.0V, time restriction 130min under electric current 0.5C constant current constant voltage, 5min is stood；
C, the second charging stage: to charge to 4.2V, cut-off current 0.02C under electric current 0.5C constant current constant voltage, time restriction is
200min stands 60min；
D, the third charging stage: first to charge to 4.21V, cut-off current 0.02C, time restriction under electric current 0.5C constant current constant voltage
For 60min, 60min is stood；Again to charge to 4.22V, cut-off current 0.02C, time restriction under electric current 0.5C constant current constant voltage
For 60min, 60min is stood；First to charge to 4.23V, cut-off current 0.02C, time restriction under electric current 0.5C constant current constant voltage
For 60min；
Obtain the battery of partial volume completion.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107359376B (en) * | 2017-06-30 | 2020-06-23 | 宁德时代新能源科技股份有限公司 | Battery charging method, device and equipment |
| CN108336434B (en) * | 2018-02-28 | 2020-05-19 | 北京国能电池科技股份有限公司 | Lithium ion battery treatment method and lithium ion battery prepared by same |
| CN108539277A (en) * | 2018-03-26 | 2018-09-14 | 南京国轩电池有限公司 | A kind of partial volume method of power-type lithium ion 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 |
| CN111710914A (en) * | 2020-06-24 | 2020-09-25 | 河南福森新能源科技有限公司 | Method for improving voltage consistency of high-capacity lithium battery |
| CN113839109A (en) * | 2021-08-17 | 2021-12-24 | 天能帅福得能源股份有限公司 | Method for rapidly grading capacity of lithium ion battery |
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| CN101154746A (en) * | 2006-09-28 | 2008-04-02 | 比亚迪股份有限公司 | Formation method for lithium ion secondary battery |
| CN103117412A (en) * | 2013-01-31 | 2013-05-22 | 深圳市海太阳实业有限公司 | Lithium ion battery and formation method thereof |
| CN104409778A (en) * | 2014-11-17 | 2015-03-11 | 东莞市久森新能源有限公司 | Capacity grading method for specially-shaped lithium ion batteries |
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| CN101154746A (en) * | 2006-09-28 | 2008-04-02 | 比亚迪股份有限公司 | Formation method for lithium ion secondary battery |
| CN103117412A (en) * | 2013-01-31 | 2013-05-22 | 深圳市海太阳实业有限公司 | Lithium ion battery and formation method thereof |
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