CN105024096A - Formation method for improving charge retention rate of lithium ion battery - Google Patents
Formation method for improving charge retention rate of lithium ion battery Download PDFInfo
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- CN105024096A CN105024096A CN201410179826.9A CN201410179826A CN105024096A CN 105024096 A CN105024096 A CN 105024096A CN 201410179826 A CN201410179826 A CN 201410179826A CN 105024096 A CN105024096 A CN 105024096A
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- lithium ion
- ion battery
- charging
- formation method
- charge retention
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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 invention relates to a formation method for improving the charge retention rate of a lithium ion battery. The formation method comprises the following steps that firstly, the lithium ion battery is charged with small current for a short time, then high-temperature storage is performed, and finally the lithium ion battery is charged with larger current. The small current is 20 mA, charging is performed under the condition that the time is 60 minutes, the storage is performed in a 45 DEG C high-temperature environment for 16 hours, and then 0.2 C charging is performed till the lithium ion battery is fully charged. By means of the formation method for improving the charge retention rate of the lithium ion battery, the ratio that a diaphragm is punctured and eventually micro short circuit is caused by the fact that cathodic simple metal impurities migrate to the anodic surface and then accumulate can be effectively reduced, accordingly the self discharge rate of the lithium ion battery is reduced, and the charge retention capability of the lithium ion battery is improved.
Description
Technical field
The present invention relates to a kind of chemical synthesizing method promoting lithium ion battery spray charging precipitator.
Background technology
Changing into is important procedure in Production Process of Lithium Battery, one deck passivation layer is formed in negative terminal surface when changing into, i.e. solid electrolyte interface film (SEI film), the quality of SEI film directly has influence on the chemical properties such as the cycle life of battery, stability, charged retentivity, fail safe.Traditional small area analysis preliminary filling mode contributes to stable SEI film and is formed, but low current charge can cause the SEI membrane impedance formed to increase for a long time, thus affects the multiplying power discharging property of lithium ion battery, and process time is long, affects production efficiency.
Current traditional round column-shaped lithium ion battery changes into flow process first and often adopts 0.2C constant current constant voltage to be charged to full electricity, cut-off current 0.01C.This flow process is that in single, low range is directly charged to full electricity, forms stable SEI film under being unfavorable for electronegative potential condition.And cylindrical lithium ion battery is unfavorable for that when changing into first elemental metals impurity oxygen in positive mix being migrated under electronegative potential condition negative pole after changing into ion separates out, and rapid diffusion and oxidation.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of chemical synthesizing method promoting lithium ion battery spray charging precipitator, the elemental metals impurity that effectively can be reduced in positive pole punctures and the ratio finally causing micro-short circuit owing to piling up caused barrier film after migrating to negative terminal surface, thus reduce lithium ion battery self discharge rate, promote its retention of charge.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, comprises the following steps: first carry out the charging of small area analysis short time to lithium ion battery, then carries out high temperature storage, finally carry out larger current charging.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out the charging of small area analysis short time: electric current is 20mA, and the time is 60min to lithium ion battery.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out high temperature storage: temperature controls within the scope of 45 ± 3 DEG C, the time is 16 hours.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out larger current charging: electric current is 0.2C, and constant current constant voltage is charged to full electricity.
Compared with prior art beneficial effect of the present invention is:
1) charging of small area analysis short time can provide one at the corrosion potential of the elemental metals impurity of positive pole, thus makes it reduce to migrate to negative terminal surface from positive pole;
2) metal ion that high temperature storage makes positive pole be corroded spreads, and is migrated to the diverse location of negative terminal surface, separate out by multichannel, is unlikely to pile up, and reduces the ratio that metal accumulation punctures barrier film micro-short circuit;
3) larger current charging can reduce the self-discharge rate of lithium ion battery, promotes its retention of charge.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Promote a chemical synthesizing method for lithium ion battery spray charging precipitator, comprise the following steps: first the charging of small area analysis short time is carried out to lithium ion battery, then carry out high temperature storage, finally carry out larger current charging.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out the charging of small area analysis short time: electric current is 20mA, and the time is 60min to lithium ion battery; The charging of small area analysis short time can provide one at the corrosion potential of the elemental metals impurity of positive pole, thus makes it reduce to migrate to negative terminal surface from positive pole.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out high temperature storage: temperature controls within the scope of 45 ± 3 DEG C, the time is 16 hours; The metal ion diffusion that high temperature storage makes positive pole be corroded, is migrated to the diverse location of negative terminal surface, separates out by multichannel, be unlikely to pile up, and reduces the ratio that metal accumulation punctures barrier film micro-short circuit.
The chemical synthesizing method of lifting lithium ion battery spray charging precipitator of the present invention, when carrying out larger current charging: electric current is 0.2C, and constant current constant voltage is charged to full electricity; Larger current charging can reduce the self-discharge rate of lithium ion battery, promotes its retention of charge.
Example
Promote a chemical synthesizing method for lithium ion battery spray charging precipitator, comprise the following steps:
1) lithium ion battery to be changed is filled on battery detecting formation cabinet;
2) use computer to the lithium ion battery transmission flow of Over-The-Counter: dormancy 5min → 20mA constant current 60min → dormancy 5min, cathode metal oxidation of impurities when namely giving a lithium ion battery voltage;
3) lithium ion battery completing above-mentioned charging is transferred in the environment of 45 DEG C and store 16 hours, the abundant diffusive migration of the metal that positive pole is oxidized is separated out to negative terminal surface, thus reach negative terminal surface without deposit, then transfer in normal temperature environment to leave standstill to battery temperature and be about 12h close to room temperature;
4) to transmission flow on detecting box on the lithium ion battery of being down to normal temperature: dormancy 5min → 0.2C constant current, to 4.2V → constant voltage to 4.2V cut-ff voltage 22mA → dormancy 5min, fully activates battery, proceeds to lower operation;
5) settle accounts self-discharge of battery and reject defective products.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (4)
1. promote a chemical synthesizing method for lithium ion battery spray charging precipitator, it is characterized in that, comprise the following steps: first the charging of small area analysis short time is carried out to lithium ion battery, then carry out high temperature storage, finally carry out larger current charging.
2. the chemical synthesizing method of lifting lithium ion battery spray charging precipitator according to claim 1, is characterized in that, when carrying out the charging of small area analysis short time to lithium ion battery: electric current is 20mA, and the time is 60min.
3. the chemical synthesizing method of lifting lithium ion battery spray charging precipitator according to claim 1, it is characterized in that, when carrying out high temperature storage: temperature controls within the scope of 45 ± 3 DEG C, the time is 16 hours.
4. the chemical synthesizing method of lifting lithium ion battery spray charging precipitator according to claim 1, is characterized in that, when carrying out larger current charging: electric current is 0.2C, and constant current constant voltage is charged to full electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179826.9A CN105024096A (en) | 2014-04-30 | 2014-04-30 | Formation method for improving charge retention rate of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410179826.9A CN105024096A (en) | 2014-04-30 | 2014-04-30 | Formation method for improving charge retention rate of lithium ion battery |
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| CN105024096A true CN105024096A (en) | 2015-11-04 |
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| CN201410179826.9A Pending CN105024096A (en) | 2014-04-30 | 2014-04-30 | Formation method for improving charge retention rate of lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511825A (en) * | 2018-03-02 | 2018-09-07 | 安徽信义电源有限公司 | Ternary soft pack cell chemical synthesizing method |
| CN112285581A (en) * | 2020-10-29 | 2021-01-29 | 天能帅福得能源股份有限公司 | Method for shortening formation detection of lithium ion battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101714665A (en) * | 2008-10-07 | 2010-05-26 | 比亚迪股份有限公司 | Battery formation method |
| US20100192362A1 (en) * | 2008-09-11 | 2010-08-05 | A123 System, Inc. | Split Charge Forming Process for Battery |
-
2014
- 2014-04-30 CN CN201410179826.9A patent/CN105024096A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100192362A1 (en) * | 2008-09-11 | 2010-08-05 | A123 System, Inc. | Split Charge Forming Process for Battery |
| CN101714665A (en) * | 2008-10-07 | 2010-05-26 | 比亚迪股份有限公司 | Battery formation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511825A (en) * | 2018-03-02 | 2018-09-07 | 安徽信义电源有限公司 | Ternary soft pack cell chemical synthesizing method |
| CN112285581A (en) * | 2020-10-29 | 2021-01-29 | 天能帅福得能源股份有限公司 | Method for shortening formation detection of lithium ion battery |
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Application publication date: 20151104 |
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