CN107528091A - A kind of lithium ion battery intelligence chemical synthesizing method - Google Patents
A kind of lithium ion battery intelligence chemical synthesizing method Download PDFInfo
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- CN107528091A CN107528091A CN201710517298.7A CN201710517298A CN107528091A CN 107528091 A CN107528091 A CN 107528091A CN 201710517298 A CN201710517298 A CN 201710517298A CN 107528091 A CN107528091 A CN 107528091A
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- battery
- blanking voltage
- electric current
- lithium ion
- temperature
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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
-
- 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
-
- 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
-
- 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 invention provides a kind of lithium ion battery intelligence chemical synthesizing method, by the parameter that battery is detected during chemical conversion, the relevant parameter of the electric current and voltage in chemical conversion is formulated according to the situation of battery, so as to formulate formation process for the inner case of each battery, the poor products generation rate in formation process is reduced, and improves the performance of lithium ion battery.Method provided by the invention, the accepted product percentage of chemical conversion lithium ion battery, and the life performance of lithium ion battery are improved, reduces production cost.
Description
Technical field
The present invention relates to cell art, more particularly to a kind of lithium ion battery intelligence chemical synthesizing method.
Background technology
With the fast development of lithium ion battery technology, lithium ion battery also starts to obtain greatly as power, accumulation power supply
Amount application.For powerful electrical source of power, several cell serial or parallel connections are generally formed into battery pack, common work
Make, and the feature of any cell fails in battery pack, can cause the feature of whole battery pack to fail, or even can draw
The problems such as security in generating pond is out of control.Because the production technology of battery each battery in process of production can not possibly complete phase
Together, therefore each battery concrete condition is electric to monomer there is also the chemical synthesis technology in technicality, especially cell production process
The performance in pond also has large effect.And existing chemical synthesizing method with a batch of battery to all using identical chemical conversion side
Formula, not in view of the difference between battery, therefore, cause defect rate higher, production cost is difficult to reduce, battery it is consistent
Property is poor.
The content of the invention
The invention provides a kind of lithium ion battery intelligence chemical synthesizing method, by the ginseng that battery is detected during chemical conversion
Number, the relevant parameter of the electric current and voltage in chemical conversion is formulated according to the situation of battery, so as to the inner case for each battery
Formation process is formulated, reduces the poor products generation rate in formation process, and improve the performance of lithium ion battery.The present invention provides
Method, improve the accepted product percentage of chemical conversion lithium ion battery, and the life performance of lithium ion battery is reduced and is produced into
This.
Specific scheme is as follows：
A kind of lithium ion battery intelligence chemical synthesizing method, including following steps：
1) lithium ion battery, is charged into the first blanking voltage with the first electric current, first blanking voltage is 3.6-
3.7V；
2) the second blanking voltage, is charged to the second electric current higher than the first electric current, second blanking voltage is 4.2-
4.3V；
3) it is, 2.7- with the 3rd current discharge to the 3rd blanking voltage higher than the second electric current, the 3rd blanking voltage
2.8V；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to the 4th blanking voltage, the 4th blanking voltage is expired
Foot formula：
Blanking voltage-the k* (cell temperature/temperature averages -1) of 4th blanking voltage=the 3rd, the k is temperature
Regulation coefficient, k 0.1-0.8；
6) battery of the 3rd blanking voltage and the 4th blanking voltage, will be discharged to, is carried out just near the blanking voltage
Several times, the positive pulse electric current is identical with the size of negative pulse current, pulse operating time phase for negative ALT pulse current cycle
Together；
7) the second blanking voltage, is charged to the 3rd electric current, then the battery with the 3rd electric current in the second blanking voltage
And the 3rd circulate between blanking voltage several times, battery capacity is detected, according to battery capacity by battery stepping.
Further, first electric current is 0.05-0.1C.
Further, second electric current is 0.1-0.5C.
Further, the 3rd electric current is 1-2C.
Further, positive and negative ALT pulse current cycle 3-20 times, pulse current 0.1-0.2C, arteries and veins in the step 6
It is 10-60s to rush action time, is spaced 10-20s.
Further, circulated 2-5 times in the step 7.
The present invention has the advantages that：
1st, battery activated in chemical conversion progress at initial stage with low current, high current charges again after activation, prevents active material
Lattice avalanche；
2nd, it is different according to the thermal discharge of different batteries with heavy-current discharge, the temperature difference between cell is increased, so as to
Filter out the battery of different situations；
3rd, according to the different situations of battery, program is activated using different overdischarge, the battery high to the big temperature of internal resistance is adopted
Program is activated with the overdischarge of larger intensity so that the battery consistency after chemical conversion is high；
4th, activated under overdischarge position using pulse current, reduce the internal resistance of cell；
5th, after activating, circulation make it that the inner case of battery is stable several times, screens and is grouped further according to capacity, so as to obtain
The high battery of uniformity.
For the present invention by such scheme, the concrete condition formulation for each cell is melted into activation pattern accordingly,
So as to improve the yield of spec battery, battery performance is improved, reduces cost.
Embodiment
The present invention will be described in more detail below by specific embodiment, but protection scope of the present invention not by
It is limited to these embodiments.
Embodiment 1
1) lithium ion battery, is charged into 3.6V with 0.05C；
2) 4.2V, is charged to 0.1C；
3) 2.7V, is discharged to 1C；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to blanking voltage：
Blanking voltage=2.7-0.1* (cell temperature/temperature averages -1)；
6), all batteries are carried out to positive and negative ALT pulse current cycle where it 3 times near voltage, the positive pulse
Electric current is all mutually 0.1C with the size of negative pulse current, and pulse operating time is all mutually 10s, is spaced 0s；
7) battery, is charged to by 4.2V with 1C, then the battery circulates 2 with same electric current between 4.2-2.7V
It is secondary, battery capacity is detected, according to battery capacity by battery stepping.
Embodiment 2
1) lithium ion battery, is charged into 3.7V with 0.1C；
2) 4.3V, is charged to 0.5C；
3) 2.8V, is discharged to 2C；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to blanking voltage：
Blanking voltage=2.8-0.8* (cell temperature/temperature averages -1)；
6), all batteries are carried out to positive and negative ALT pulse current cycle where it 20 times near voltage, the positive arteries and veins
It is all mutually 0.2C that electric current, which is rushed, with the size of negative pulse current, and pulse operating time is all mutually 60s, is spaced 20s；
7) battery, is charged to by 4.3V with 2C, then the battery circulates 5 with same electric current between 4.3-2.8V
It is secondary, battery capacity is detected, according to battery capacity by battery stepping.
Embodiment 3
1) lithium ion battery, is charged into 3.6V with 0.08C；
2) 4.2V, is charged to 0.2C；
3) 2.7V, is discharged to 1.5C；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to blanking voltage, blanking voltage meets following formula：
Blanking voltage=2.7-0.5* (cell temperature/temperature averages -1)；
6), all batteries are carried out to positive and negative ALT pulse current cycle where it 10 times near voltage, the positive arteries and veins
It is all mutually 0.2C that electric current, which is rushed, with the size of negative pulse current, and pulse operating time is all mutually 30s, is spaced 10s；
7) battery, is charged to by 4.2V with 1.5C, then the battery circulates 4 with same electric current between 4.2-2.7V
It is secondary, battery capacity is detected, according to battery capacity by battery stepping.
Embodiment 4
1) lithium ion battery, is charged into 3.65V with 0.06C；
2) 4.25V, is charged to 0.3C；
3) 2.75V, is discharged to 2C；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to blanking voltage, blanking voltage meets following formula：
Blanking voltage=2.75-0.3* (cell temperature/temperature averages -1)；
6), all batteries are carried out to positive and negative ALT pulse current cycle where it 15 times near voltage, the positive arteries and veins
It is all mutually 0.15C that electric current, which is rushed, with the size of negative pulse current, and pulse operating time is all mutually 20s, is spaced 10s；
7) battery, is charged to by 4.25V with 2C, then the battery is circulated with same electric current between 4.25-2.75V
5 times, battery capacity is detected, according to battery capacity by battery stepping.
Embodiment 5
1) lithium ion battery, is charged into 3.6V with 0.1C；
2) 4.3V, is charged to 0.4C；
3) 2.7V, is discharged to 2C；
4) temperature of each cell, is measured, calculates temperature averages；
5), temperature is higher than to the battery of average value, continue to be overdisharged to blanking voltage, blanking voltage meets following formula：
Blanking voltage=2.7-0.2* (cell temperature/temperature averages -1)；
6), all batteries are carried out to positive and negative ALT pulse current cycle where it 10 times near voltage, the positive arteries and veins
It is all mutually 0.2C that electric current, which is rushed, with the size of negative pulse current, and pulse operating time is all mutually 40s, is spaced 20s；
7) battery, is charged to by 4.3V with 2C, then the battery circulates 5 with same electric current between 4.3-2.7V
It is secondary, battery capacity is detected, according to battery capacity by battery stepping.
Comparative example 1
Circulated with 0.2C between 4.2V and 2.7V 5 times, detect battery capacity, according to battery capacity by battery stepping.
Test and result
Embodiment 1-5, the method chemical conversion of comparative example 1, record substandard products are respectively adopted in five Battery packs of every group 1000
Number, 20 certified products in same shelves after then Example and comparative example are melted into respectively form battery pack, with 1C electric current
Charge and discharge cycles are carried out, record the service life of battery pack.It can be seen that using the method for the embodiment of the present invention, defect rate is reduced,
And improve the service life of resultant battery.
Table 1
Although present disclosure is discussed in detail by above preferred embodiment, but it would be recognized that above-mentioned
Description be not considered as limitation of the present invention.
Claims (6)
- A kind of 1. lithium ion battery intelligence chemical synthesizing method, including following steps：1) lithium ion battery, is charged into the first blanking voltage with the first electric current, first blanking voltage is 3.6-3.7V；2) the second blanking voltage, is charged to the second electric current higher than the first electric current, second blanking voltage is 4.2-4.3V；3) it is, 2.7-2.8V with the 3rd current discharge to the 3rd blanking voltage higher than the second electric current, the 3rd blanking voltage；4) temperature of each cell, is measured, calculates temperature averages；5), temperature is higher than to the battery of average value, continue to be overdisharged to the 4th blanking voltage, under the 4th blanking voltage meets Formula：4th blanking voltage=the 3rd blanking voltage-k* (cell temperature/temperature averages -1), the k are temperature adjustment Coefficient, k 0.1-0.8；6) battery of the 3rd blanking voltage and the 4th blanking voltage, will be discharged to, positive and negative friendship is carried out near the blanking voltage For pulse current circulation several times, the positive pulse electric current is identical with the size of negative pulse current, and pulse operating time is identical；7) the second blanking voltage, is charged to the 3rd electric current, then the battery with the 3rd electric current in the second blanking voltage and Circulated between three blanking voltages several times, detect battery capacity, according to battery capacity by battery stepping.
- 2. the method as described in claim 1, first electric current is 0.05-0.1C.
- 3. the method as described in claim 1, second electric current is 0.1-0.5C.
- 4. the method as described in claim 1, the 3rd electric current is 1-2C.
- 5. the method as described in claim 1, positive and negative ALT pulse current cycle 3-20 times, pulse current are in the step 6 0.1-0.2C, pulse operating time 10-60s, it is spaced 0-20s.
- 6. the method as described in claim 1, circulated 2-5 times in the step 7.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470915A (en) * | 2018-03-20 | 2018-08-31 | 福州鼎烯飞扬科技有限公司 | A kind of Intelligent electric bicycle quick charging battery packet and its charging method |
| CN108776307A (en) * | 2018-04-24 | 2018-11-09 | 合肥国轩高科动力能源有限公司 | A kind of lithium-ion electric core conformity classification method based on battery core quantity of heat production |
| CN112034357A (en) * | 2020-08-04 | 2020-12-04 | 中汽研汽车检验中心（天津）有限公司 | Over-discharge zero-voltage time prediction method for lithium ion battery |
| CN113782811A (en) * | 2021-09-13 | 2021-12-10 | 宁德新能源科技有限公司 | Electric equipment and method for heating electrochemical device |
| CN116598622A (en) * | 2023-05-29 | 2023-08-15 | 珠海全迪新能源科技有限公司 | Formation method for improving capacity of lithium battery |
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| CN1780041A (en) * | 2004-11-26 | 2006-05-31 | 中国电子科技集团公司第十八研究所 | Chemosynthetic post treatment for high-energy lithium ion cell |
| JP2011222358A (en) * | 2010-04-12 | 2011-11-04 | Yokogawa Electric Corp | Charging method of lithium ion secondary battery |
| CN103579696A (en) * | 2012-08-09 | 2014-02-12 | 北汽福田汽车股份有限公司 | Battery assembling method |
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| CN1780041A (en) * | 2004-11-26 | 2006-05-31 | 中国电子科技集团公司第十八研究所 | Chemosynthetic post treatment for high-energy lithium ion cell |
| JP2011222358A (en) * | 2010-04-12 | 2011-11-04 | Yokogawa Electric Corp | Charging method of lithium ion secondary battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470915A (en) * | 2018-03-20 | 2018-08-31 | 福州鼎烯飞扬科技有限公司 | A kind of Intelligent electric bicycle quick charging battery packet and its charging method |
| CN108470915B (en) * | 2018-03-20 | 2020-11-20 | 福州鼎烯飞扬科技有限公司 | Intelligent electric bicycle quick-charging battery pack and charging method thereof |
| CN108776307A (en) * | 2018-04-24 | 2018-11-09 | 合肥国轩高科动力能源有限公司 | A kind of lithium-ion electric core conformity classification method based on battery core quantity of heat production |
| CN112034357A (en) * | 2020-08-04 | 2020-12-04 | 中汽研汽车检验中心（天津）有限公司 | Over-discharge zero-voltage time prediction method for lithium ion battery |
| CN112034357B (en) * | 2020-08-04 | 2023-05-12 | 中汽研汽车检验中心（天津）有限公司 | Over-discharge zero-voltage time prediction method for lithium ion battery |
| CN113782811A (en) * | 2021-09-13 | 2021-12-10 | 宁德新能源科技有限公司 | Electric equipment and method for heating electrochemical device |
| CN113782811B (en) * | 2021-09-13 | 2023-02-28 | 宁德新能源科技有限公司 | Electric equipment and method for heating electrochemical device |
| CN116598622A (en) * | 2023-05-29 | 2023-08-15 | 珠海全迪新能源科技有限公司 | Formation method for improving capacity of lithium battery |
| CN116598622B (en) * | 2023-05-29 | 2024-01-23 | 珠海全迪新能源科技有限公司 | Formation method for improving capacity of lithium battery |
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