CN105161766A - Filling formation method for power type lithium battery - Google Patents
Filling formation method for power type lithium battery Download PDFInfo
- Publication number
- CN105161766A CN105161766A CN201510470332.0A CN201510470332A CN105161766A CN 105161766 A CN105161766 A CN 105161766A CN 201510470332 A CN201510470332 A CN 201510470332A CN 105161766 A CN105161766 A CN 105161766A
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- China
- Prior art keywords
- fluid injection
- synthesizing method
- chemical synthesizing
- plastic film
- sealing
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention belongs to the preparation field of lithium batteries, in particular to a filling formation method for a power type lithium battery, comprising: packaging a top edge and a side edge of a core by an aluminum plastic film on a top sealing model and a side sealing model respectively, reserving an air bag in packaging; filling the aluminum plastic film used for packaging the core with an electrolyte and then standing; pumping gas from the air bag and pre-sealing; charging and discharging for two times at constant current; and pumping gas from the air bag again and sealing, and finally cutting off the redundant part of the air bag. The air bag is reserved in the packaging process, so that gas in the battery can be pumped completely through the air bag; and meanwhile, the redundant electrolyte is pumped also in the air pumping and sealing processes so as to ensure tight packaging and avoid the ballooning phenomenon.
Description
Technical field
The present invention relates to the preparation technology of lithium battery, is a kind of fluid injection chemical synthesizing method of power lithium battery specifically.
Background technology
For alleviating global energy crisis, environmental crisis, some countries concentrate on focus on New Energy Industry, and Development of EV is then the emphasis of New Energy Industry; Therefore, for electric automobile provides the power lithium battery of clean environment firendly more and more to come into one's own.At present, for power lithium battery, in manufacturing technology and in application, have very large market and development prospect, technique and the application study of strengthening power lithium battery are significant for the fast development promoting New Energy Industry.
Lithium battery on market generally comprises positive pole, negative pole, electrolyte, barrier film, positive pole negative wire, center terminal etc., and wherein positive electrode selects the material with layer structure, tridimensional network or tunnel structure usually; The intercalation materials of li ions that negative material selects lithium battery to free in and out usually, only there is corresponding expansion or contraction in material itself, do not occur that stress is excessive causes efflorescence and avalanche, thus high specific capacity can be obtained, have again rock-steady structure support under excellent cycle characteristic.But existing lithium battery is produced because processing step in preparation process and condition control good not, can cause encapsulation imprecision, cause the electrolyte of battery to be revealed and make battery capacity decline, while air in moisture also can enter in battery, cause ballooning.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of fluid injection chemical synthesizing method encapsulating tight power lithium battery.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of fluid injection chemical synthesizing method of power lithium battery, and it comprises the following steps:
(1) battery core aluminum plastic film is carried out on closedtop mould and side seal mould top margin and side encapsulation respectively, during encapsulation, reserve airbag;
(2) leave standstill inject electrolyte in the aluminum plastic film of packaging electric core after;
(3) from airbag gas bleeding also pre-sealing;
(4) constant current charge, electric discharge twice is carried out again;
(5) again seal from airbag gas bleeding, finally cut away airbag redundance.
Further, before injection electrolyte, by the aluminum plastic film vacuumize of packaging electric core.
Further, when top margin encapsulates, closedtop patrix temperature is 230 DEG C ± 5 DEG C, and closedtop counterdie temperature is 180 DEG C ± 10 DEG C.
Further, when side encapsulates, side seal patrix temperature is 190 DEG C ± 5 DEG C, and side seal counterdie temperature is 180 DEG C ± 5 DEG C.
Further, described aluminum plastic film is made up of interior layer polypropylene, middle level aluminium foil, outer polyester material three layers.
Further, time of repose is 10min ± 1min.
Further, air pressure 0.5MPa is sealed.
Further, during charging first with 1000mA constant current charge to 65% of quantities of charge, then with 1000mA constant-current discharge to 3V; Continuous circulation twice.
From above scheme, the present invention reserves airbag in encapsulation process, drains only by airbag by the gas of inside battery; Meanwhile, if having unnecessary electrolyte bleeding in capping processes, also can extract out together; Thus ensure that encapsulation is tight, avoid causing ballooning.
Embodiment
Below the present invention is introduced in detail:
A fluid injection chemical synthesizing method for power lithium battery, it comprises and battery core aluminum plastic film is carried out on closedtop mould and side seal mould top margin and side encapsulation respectively, reserves airbag during encapsulation; Wherein aluminum plastic film is made up of interior layer polypropylene, middle level aluminium foil, outer polyester material three layers, and it not only has high barrier, good heat sealability; And do not react with electrolyte, there is good ductility, pliability and mechanical strength.
When top margin encapsulates, closedtop patrix temperature is 230 DEG C ± 5 DEG C, and closedtop counterdie temperature is 180 DEG C ± 10 DEG C; When side encapsulates, side seal patrix temperature is 190 DEG C ± 5 DEG C, and side seal counterdie temperature is 180 DEG C ± 5 DEG C; Such guarantee packaging effect, makes encapsulation tight.
Electrolyte is injected in the aluminum plastic film of packaging electric core; This needs strictly controlled environment humidity and vacuum degree, requires to carry out in slipcase case, and the vacuum degree in glove box is-0.02MPa.Electrolyte consumption liquid is also an important parameter, and the battery of unlike signal injects the quality difference of electrolyte.Before injection electrolyte, by the aluminum plastic film vacuumize of packaging electric core, the moisture in removing battery, ensures the quality of battery.
After adding electrolyte, should 10min be left standstill, ensure that electrolyte fully infiltrates; In order to make electrolyte absorb completely, must seal from airbag gas bleeding and at the air pressure of 0.5MPa, can the gas of inside battery be drained only by battery; Meanwhile, if having unnecessary electrolyte bleeding in capping processes, also can extract out together, then enter chemical synthesis technology.Because lithium ion battery often produces gas in charging process, this is due in initial charge discharge process, the negative pole of battery will form passivating film, gas can be produced along with the decomposition of electrolyte and so likely cause automobile inflatable in the forming process of passivating film, therefore for ensureing that the quality of battery will to be bled sealing again to battery, after current sealing, unnecessary gas pocket part be cut away.
When changing into, first with 1000mA constant current charge to 65% of quantities of charge, then with 1000mA constant-current discharge to 3V; Continuous circulation twice.Such employing low current charge, is conducive to forming stable SEI film, and the active material in battery is activated; Again the final voltage of battery charging is limited simultaneously, avoid battery overvoltage to charge.Therefore, it is comparatively slow that this one-tenth method makes battery capacity decay, and capability retention is high.
Above-mentioned execution mode is used for illustrative purposes only, and be not limitation of the present invention, the those of ordinary skill of relevant technical field, without departing from the spirit and scope of the present invention, can also make various change and modification, therefore all equivalent technical schemes also should belong to category of the present invention.
Claims (8)
1. a fluid injection chemical synthesizing method for power lithium battery, it comprises the following steps:
(1) battery core aluminum plastic film is carried out on closedtop mould and side seal mould top margin and side encapsulation respectively, during encapsulation, reserve airbag;
(2) leave standstill inject electrolyte in the aluminum plastic film of packaging electric core after;
(3) from airbag gas bleeding also pre-sealing;
(4) constant current charge, electric discharge twice is carried out again;
(5) again seal from airbag gas bleeding, finally cut away airbag redundance.
2. fluid injection chemical synthesizing method according to claim 1, is characterized in that: before injection electrolyte, by the aluminum plastic film vacuumize of packaging electric core.
3. fluid injection chemical synthesizing method according to claim 1, it is characterized in that: when top margin encapsulates, closedtop patrix temperature is 230 DEG C ± 5 DEG C, and closedtop counterdie temperature is 180 DEG C ± 10 DEG C.
4. fluid injection chemical synthesizing method according to claim 3, it is characterized in that: when side encapsulates, side seal patrix temperature is 190 DEG C ± 5 DEG C, and side seal counterdie temperature is 180 DEG C ± 5 DEG C.
5. fluid injection chemical synthesizing method according to claim 4, is characterized in that: described aluminum plastic film is made up of interior layer polypropylene, middle level aluminium foil, outer polyester material three layers.
6. fluid injection chemical synthesizing method according to claim 1, is characterized in that: time of repose is 10min ± 1min.
7. fluid injection chemical synthesizing method according to claim 1, is characterized in that: pre-sealing and sealing air pressure are 0.5MPa.
8. fluid injection chemical synthesizing method according to claim 1, is characterized in that: during charging first with 1000mA constant current charge to 65% of quantities of charge, then with 1000mA constant-current discharge to 3V; Continuous circulation twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510470332.0A CN105161766B (en) | 2015-08-05 | 2015-08-05 | A kind of fluid injection chemical synthesizing method of power lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510470332.0A CN105161766B (en) | 2015-08-05 | 2015-08-05 | A kind of fluid injection chemical synthesizing method of power lithium battery |
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| CN105161766A true CN105161766A (en) | 2015-12-16 |
| CN105161766B CN105161766B (en) | 2018-04-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450531A (en) * | 2016-09-12 | 2017-02-22 | 国轩新能源（苏州）有限公司 | Formation method for reducing gas retention in formation process of flexibly-packaged lithium battery |
| CN106935912A (en) * | 2017-03-10 | 2017-07-07 | 江西佳沃新能源有限公司 | A kind of compound method for lithium ion battery |
| CN109030567A (en) * | 2018-07-06 | 2018-12-18 | 力信（江苏）能源科技有限责任公司 | A kind of lithium-ion electric core water content inside method of discrimination |
| CN109742455A (en) * | 2018-12-24 | 2019-05-10 | 深圳市量能科技有限公司 | A kind of production method of lithium ion battery |
| CN112599874A (en) * | 2020-12-09 | 2021-04-02 | 中国科学院上海硅酸盐研究所 | Electrochemical pretreatment method for improving performance of quasi-solid lithium ion battery |
| CN112821007A (en) * | 2019-10-30 | 2021-05-18 | 宁德新能源科技有限公司 | Unformed battery, preparation method of battery and formation equipment |
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| JP2005346965A (en) * | 2004-05-31 | 2005-12-15 | Sanyo Electric Co Ltd | Battery and manufacturing method of battery |
| CN101118976A (en) * | 2007-08-14 | 2008-02-06 | 深圳市邦凯电子有限公司 | Method for manufacturing soft packed lithium ion battery |
| CN101764261A (en) * | 2010-01-28 | 2010-06-30 | 中航锂电（洛阳）有限公司 | Formation method for lithium ion battery |
| CN103824985A (en) * | 2014-03-20 | 2014-05-28 | 东莞新能源科技有限公司 | Flexible battery pack and preparation method thereof |
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2015
- 2015-08-05 CN CN201510470332.0A patent/CN105161766B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005346965A (en) * | 2004-05-31 | 2005-12-15 | Sanyo Electric Co Ltd | Battery and manufacturing method of battery |
| CN101118976A (en) * | 2007-08-14 | 2008-02-06 | 深圳市邦凯电子有限公司 | Method for manufacturing soft packed lithium ion battery |
| CN101764261A (en) * | 2010-01-28 | 2010-06-30 | 中航锂电（洛阳）有限公司 | Formation method for lithium ion battery |
| CN103824985A (en) * | 2014-03-20 | 2014-05-28 | 东莞新能源科技有限公司 | Flexible battery pack and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450531A (en) * | 2016-09-12 | 2017-02-22 | 国轩新能源（苏州）有限公司 | Formation method for reducing gas retention in formation process of flexibly-packaged lithium battery |
| CN106935912A (en) * | 2017-03-10 | 2017-07-07 | 江西佳沃新能源有限公司 | A kind of compound method for lithium ion battery |
| CN109030567A (en) * | 2018-07-06 | 2018-12-18 | 力信（江苏）能源科技有限责任公司 | A kind of lithium-ion electric core water content inside method of discrimination |
| CN109030567B (en) * | 2018-07-06 | 2020-12-22 | 力信（江苏）能源科技有限责任公司 | Method for judging internal water content of lithium ion battery cell |
| CN109742455A (en) * | 2018-12-24 | 2019-05-10 | 深圳市量能科技有限公司 | A kind of production method of lithium ion battery |
| CN112821007A (en) * | 2019-10-30 | 2021-05-18 | 宁德新能源科技有限公司 | Unformed battery, preparation method of battery and formation equipment |
| CN112599874A (en) * | 2020-12-09 | 2021-04-02 | 中国科学院上海硅酸盐研究所 | Electrochemical pretreatment method for improving performance of quasi-solid lithium ion battery |
| CN112599874B (en) * | 2020-12-09 | 2022-06-14 | 中国科学院上海硅酸盐研究所 | Electrochemical pretreatment method for improving performance of quasi-solid lithium ion battery |
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| CN105161766B (en) | 2018-04-10 |
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