CN102403530A - Flexible package lithium ion battery and processing method thereof - Google Patents
Flexible package lithium ion battery and processing method thereof Download PDFInfo
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- CN102403530A CN102403530A CN2011103230571A CN201110323057A CN102403530A CN 102403530 A CN102403530 A CN 102403530A CN 2011103230571 A CN2011103230571 A CN 2011103230571A CN 201110323057 A CN201110323057 A CN 201110323057A CN 102403530 A CN102403530 A CN 102403530A
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- lithium ion
- putamina
- ion battery
- processing method
- flexible packing
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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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- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a flexible package lithium ion battery and a processing method thereof. The flexible package lithium ion battery comprises a membrane housing, a lug, and an electric core and an electrolyte which are arranged in the membrane housing, wherein the membrane housing is provided with a sheet one-way valve, one end of the sheet one-way valve is inserted into the electric core and the other end of the sheet one-way valve is exposed outside the electric core, and the sheet one-way valve is used for exhausting gas inside the flexible package lithium ion battery. The processing method of the flexible package lithium ion battery comprises the following steps of: A, punching the housing without an air bag; B, coiling the electric core into the membrane housing; C, doubling over along an upper die cavity and a lower die cavity, carrying out tip seal and side seal, packaging the sheet one-way valve on the membrane housing; D, injecting electrolyte, standing until the electrolyte is absorbed completely and vacuumized; E, packaging the electrolyte-injecting side; and F, degassing. Through arranging the sheet one-way valve on the top, gas generated during the degassing can be immediately exhausted, the air bag and the air bag and the right side part of the air bag can be removed during punching the housing, thus raw materials and processing procedures are saved, and packaging effect and safety of the battery are improved.
Description
Technical field
The present invention relates to lithium ion battery and processing method thereof, relate in particular to a kind of flexible packing lithium ion battery and processing method thereof.
Background technology
Since lithium ion battery was born, because advantages such as its specific capacity is high, specific energy is high, have extended cycle life, memory-less effect, clean environment firendly are developed rapidly and use widely, lithium ion battery had obtained popularizing in the baby battery field at present.But problems such as its production cost is higher, and fail safe is relatively poor have restricted further developing of lithium ion battery.
At present, in the packaging technology of flexible packing lithium ion battery, what generally adopt towards shell is the shell side formula of dashing that has gasbag-type, as shown in Figure 1, is the structural representation after shell, comprises two die cavitys 1, air bag 2 and putaminas 3 up and down.The gas that produces when air bag 2 wherein changes in order to storage once encapsulates on air bag 2 right sides earlier during encapsulation, carries out the secondary encapsulation after changing into again in air bag 2 left sides.The flow chart of whole packaging technology is as shown in Figure 2.There is following defective in the technology of this prior art: 1. secondary encapsulation back right side material and air bag need all be cut and give up, so this method aluminum plastic film consumption is big, waste is many.2. will be when fluid injection one side seal is adorned through once encapsulation and secondary encapsulation, the operation and the man-hour that need are many, uneconomical.3. can not encapsulate immediately after the fluid injection of secondary package position, can continue in the operation afterwards contact with electrolyte, encapsulation place and electrolyte can cause encapsulating that pulling force reduces, the packaging effect reduction time of contact than length.4. issuable pernicious gas and inside battery Long contact time also can cause the decline of battery performance after changing into.
Summary of the invention
For solving the defective that prior art exists; The present invention provides a kind of flexible packing lithium ion battery; Comprise putamina, lug and place the electric core and the electrolyte of said putamina, said putamina is provided with the thin slice unidirectional valve, and said thin slice unidirectional valve one end inserts electric in-core portion; The other end is exposed at outside the electric core, is used for said flexible packing lithium ion battery gas inside is discharged.
Preferably, said thin slice unidirectional valve is arranged on the top of said putamina through the sealing of lug glue.
Further preferred, said putamina is the plastic-aluminum putamina.
The present invention also provides a kind of processing method of flexible packing lithium ion battery, and it comprises the steps:
A. exempt from air bag towards shell;
B. electric core is involved in the putamina;
C. edge die cavity doubling up and down, and carry out closedtop and side seal, on said putamina, enclose the thin slice unidirectional valve simultaneously;
D. fluid injection is left standstill after electrolyte absorbs fully and is vacuumized;
E. the fluid injection side is encapsulated;
F. change into.
Preferably, said inclosure thin slice unidirectional valve is the top at said putamina.
Further preferred, said inclosure thin slice unidirectional valve is to realize through lug glue and the inner PP layer fusing of aluminum plastic film adhesion.
The invention has the beneficial effects as follows:
Through the thin slice unidirectional valve is set at the top; Can in time discharge when changing into the gas that produces, can save air bag and air bag right portions during towards shell, can directly once encapsulate in fluid injection, after leaving standstill, vacuumizing and put in place on the putamina right side; Can practice thrift the aluminum plastic film of 20%-40%, reduce cost of material greatly.Simultaneously, compare the packaging process that has reduced the side encapsulation, practice thrift a station and certain man-hour, reduced production cost, improved production efficiency with original packaging technology.Moreover, reduced the time that encapsulation place contacts with electrolyte, improved packaging effect.In addition, the thin slice unidirectional valve can be when changing into or after changing into (in use) gas of producing such as HF etc. in time get rid of, the influence of gas is dropped to minimum, and the fail safe that improves battery.
Description of drawings
Fig. 1 be in the existing packaging technology after the shell structural representation of product before the fluid injection.
Fig. 2 is existing packaging technology flow chart.
Fig. 3 is the packaging technology flow chart of one embodiment of the invention.
Fig. 4 be in the packaging technology of one embodiment of the invention after the shell structural representation of product before the fluid injection.
Fig. 5 is the structural representation and the partial enlarged drawing of the flexible packing lithium ion battery of one embodiment of the invention.
Fig. 6 is the encapsulation pulling force correlation curve figure of the technology encapsulation back product of Fig. 2 and Fig. 4.
Embodiment
A kind of flexible packing lithium ion battery provided by the invention dash shell and packaging technology is applicable to all flexible packing lithium ion batteries; What in this specific embodiment of the invention, adopt is the flexible package liquid lithium ionic cell; The anodal cobalt acid lithium oiliness prescription that adopts; Negative pole adopts the Delanium water prescription, and electrolyte is the LiPF6 that organic solvent such as EC/EMC/PC/DMC/DEC adds 0.5～2mol/L.The flexible-packed battery that with the model is 704570P is example (wherein, electric core thickness 7.0mm, electric core width 45mm, electric core height 70mm, P represents the Soft Roll lithium ion battery), and combines accompanying drawing analysis.
Embodiment
As shown in Figure 3, be the processing method flow chart of this embodiment, this processing method comprises the steps:
A. exempt from air bag towards shell, during promptly towards shell, need not retention balloon structure in the plastic-aluminum putamina;
B. electric core is involved in the plastic-aluminum putamina;
C. edge die cavity doubling up and down, and carry out closedtop and side seal, on said putamina, enclose the thin slice unidirectional valve simultaneously;
D. fluid injection is left standstill after electrolyte absorbs fully and is vacuumized;
E. the fluid injection side is encapsulated;
F. change into.
Wherein, preferably said thin slice unidirectional valve is enclosed the top of said putamina,, realized through lug glue and the inner PP layer fusing of aluminum plastic film adhesion, to guarantee better packaging effect at lug Jiao Chu.The thin slice unidirectional valve is used for the gas of inside battery is derived, and it is shorter that it exposes electric core length, even be retained in the use that also can not influence battery in the final products like this.
As shown in Figure 4, be in the processing method of this embodiment after the shell structural representation of product before the fluid injection, comprise two die cavitys 1 and putamina 3, die cavity 1 places the inside of putamina 3, one on the other.Itself and prior art are not contain air bag 2 (see figure 1)s towards the shell difference of the structure aspects of product afterwards, and putamina 3 integral width are less relatively.
As shown in Figure 5; Be the structural representation and the partial enlarged drawing of the flexible packing lithium ion battery that obtains of the processing method through this embodiment; It comprises both positive and negative polarity lug 5, the thin slice unidirectional valve 6 of plastic-aluminum putamina 3, electric core 4, electric core 4, and the middle part of thin slice unidirectional valve 6 is a lug glue 7.
Can in time discharge the gas that inside battery produces owing to increased thin slice unidirectional valve 6 during closedtop; So aluminum plastic film need not airbag structure during towards shell; The encapsulation distance (this is apart from deciding according to concrete sealed in unit and needs) that only keeps 10mm gets final product; Battery liquid-filling, leave standstill after electrolyte absorbs fully and vacuumize, directly encapsulate in fluid injection one side then and get final product, need not afterwards to encapsulate once more.The thin slice unidirectional valve 6 that the gas that produces when changing into can be provided with from the top is discharged, thereby minimizes the influence of pernicious gas.And the gas that produces during the improper use of finished product battery also can in time discharge through thin slice unidirectional valve 6, prevented because the generation of the excessive accidents such as blast that cause of inner pressure of battery, improved the fail safe of battery use.The side seal of fluid injection simultaneously dress can settle at one go, saves a station, practices thrift certain man-hour, has reduced production cost, has improved production efficiency.
Packaging process settles at one go; Also avoided the generation of following unfavorable condition in the existing technology: the Long contact time of secondary package position and electrolyte; Electrolyte permeability causes the inner PP fusing of aluminum plastic film packaging effect not good in the inner PP layer of aluminum plastic film, or even the aluminum plastic film layering etc.
Comparative example
Aluminum plastic film is possessed airbag structure during towards shell, and behind the core winding into shell, putamina doubling in the middle of the die cavity is up and down carried out the top side envelope with putamina upside and left side again, only stays the side wait fluid injection of air bag; Fluid injection is left standstill, is vacuumized the back and once encapsulates earlier on the right side of air bag; Leave standstill treat electrolyte fully soak into the volume core after train wheel bridge change into, the gas that produces when changing into will be extruded in the air bag to be preserved, in order to avoid gas residue impacts at inside battery, and the secondary pumping that helps back encapsulates; Scratch air bag after changing into, vacuumize, carry out the secondary encapsulation in up and down die cavity right side, air bag leftward position then, at last secondary is encapsulated the right side, position and cut, promptly wiped out the air bag of secondary process effect and unnecessary aluminum plastic film.
The aluminum plastic film overall width that uses in the aforementioned embodiment of the invention is 63.5mm, and the aluminum plastic film overall width that uses in the comparative example is 98.5mm.Contrast can be known, original relatively processing technology, and the processing of this size battery can be practiced thrift aluminum plastic film (1-63.50/98.50)=35.5%; Simultaneously; Those skilled in the art can know that along with the width of battery different model is different, the amount of saving also can be different; Width such as battery is more little, and the aluminum plastic film that can practice thrift is many more.
As shown in Figure 6, be the encapsulation pulling force correlation curve figure of the processing technology encapsulation back product of the prior art and the embodiment of the invention, clearly, the encapsulation pulling force of the product that the present invention makes is far above the encapsulation pulling force of the product of prior art.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, make some substituting or obvious modification under the prerequisite of the present invention design not breaking away from, and performance or purposes are identical, all should be regarded as belonging to protection scope of the present invention.
Claims (7)
1. flexible packing lithium ion battery; Comprise putamina, lug and place the electric core and the electrolyte of said putamina; It is characterized in that: said putamina is provided with the thin slice unidirectional valve; Said thin slice unidirectional valve one end inserts electric in-core portion, and the other end is exposed at outside the electric core, is used for said flexible packing lithium ion battery gas inside is discharged.
2. flexible packing lithium ion battery as claimed in claim 1 is characterized in that: said thin slice unidirectional valve is arranged on the top of said putamina through the sealing of lug glue.
3. according to claim 1 or claim 2 flexible packing lithium ion battery, it is characterized in that: said putamina is the plastic-aluminum putamina.
4. the processing method of a flexible packing lithium ion battery is characterized in that comprising the steps:
A. exempt from air bag towards shell;
B. electric core is involved in the putamina;
C. edge die cavity doubling up and down, and carry out closedtop and side seal, on said putamina, enclose the thin slice unidirectional valve simultaneously;
D. fluid injection is left standstill after electrolyte absorbs fully and is vacuumized;
E. the fluid injection side is encapsulated;
F. change into.
5. the processing method of flexible packing lithium ion battery as claimed in claim 4, it is characterized in that: said inclosure thin slice unidirectional valve is the top at said putamina.
6. the processing method of flexible packing lithium ion battery as claimed in claim 5 is characterized in that: said inclosure thin slice unidirectional valve is to realize through lug glue and the inner PP layer fusing of aluminum plastic film adhesion.
7. like the processing method of claim 4 or 5 or 6 described flexible packing lithium ion batteries, it is characterized in that: said putamina is the plastic-aluminum putamina.
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| CN2011103230571A CN102403530A (en) | 2011-10-21 | 2011-10-21 | Flexible package lithium ion battery and processing method thereof |
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| CN2011103230571A CN102403530A (en) | 2011-10-21 | 2011-10-21 | Flexible package lithium ion battery and processing method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000960A (en) * | 2012-12-27 | 2013-03-27 | 天津力神电池股份有限公司 | Encapsulation method and encapsulation device of soft-package lithium-ion battery |
| CN103855332A (en) * | 2012-11-30 | 2014-06-11 | 昭和电工包装株式会社 | External body for electrochemical devices |
| CN104332646A (en) * | 2014-10-17 | 2015-02-04 | 金川集团股份有限公司 | Plastic-aluminum film packed cylindrical lithium ion battery and making method thereof |
| CN104332660A (en) * | 2014-11-19 | 2015-02-04 | 德阳威旭锂电科技有限责任公司 | Sealing device used in formation step of lithium ion battery production and formation device of sealing device |
| CN106198123A (en) * | 2016-08-12 | 2016-12-07 | 合肥国轩高科动力能源有限公司 | A kind of gas collection method analyzed for gas generated in lithium ion battery |
| CN107464955A (en) * | 2016-06-02 | 2017-12-12 | 万向二三股份公司 | A kind of electrolyte wetting method of soft bag lithium ionic cell |
| CN107978714A (en) * | 2017-12-27 | 2018-05-01 | 河北银隆新能源有限公司 | A kind of exhaust apparatus of lithium ion battery |
| CN108417921A (en) * | 2018-02-09 | 2018-08-17 | 浙江衡远新能源科技有限公司 | A kind of preparation method and battery of high energy density cells |
| CN109818000A (en) * | 2018-12-30 | 2019-05-28 | 武汉昊诚能源科技有限公司 | High temperature modification lithium manganese flexible-packed battery electrolyte and its method for preparing battery |
| CN111048843A (en) * | 2019-11-19 | 2020-04-21 | 深圳君耀投资合伙企业(有限合伙) | Manufacturing method of soft package lithium ion battery and soft package lithium ion battery |
| CN113707945A (en) * | 2021-07-26 | 2021-11-26 | 曙鹏科技（深圳）有限公司 | Preparation method of lithium ion battery |
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| CN101000969A (en) * | 2007-01-16 | 2007-07-18 | 天津力神电池股份有限公司 | Packaging method of cylindrical lithium ion battery |
| CN101512821A (en) * | 2006-08-28 | 2009-08-19 | 株式会社Lg化学 | Secondary battery including one-way exhaust valve |
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Patent Citations (2)
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| CN101512821A (en) * | 2006-08-28 | 2009-08-19 | 株式会社Lg化学 | Secondary battery including one-way exhaust valve |
| CN101000969A (en) * | 2007-01-16 | 2007-07-18 | 天津力神电池股份有限公司 | Packaging method of cylindrical lithium ion battery |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103855332B (en) * | 2012-11-30 | 2017-04-12 | 昭和电工包装株式会社 | External body for electrochemical devices |
| CN103855332A (en) * | 2012-11-30 | 2014-06-11 | 昭和电工包装株式会社 | External body for electrochemical devices |
| CN103000960A (en) * | 2012-12-27 | 2013-03-27 | 天津力神电池股份有限公司 | Encapsulation method and encapsulation device of soft-package lithium-ion battery |
| CN104332646A (en) * | 2014-10-17 | 2015-02-04 | 金川集团股份有限公司 | Plastic-aluminum film packed cylindrical lithium ion battery and making method thereof |
| CN104332660A (en) * | 2014-11-19 | 2015-02-04 | 德阳威旭锂电科技有限责任公司 | Sealing device used in formation step of lithium ion battery production and formation device of sealing device |
| CN107464955A (en) * | 2016-06-02 | 2017-12-12 | 万向二三股份公司 | A kind of electrolyte wetting method of soft bag lithium ionic cell |
| CN107464955B (en) * | 2016-06-02 | 2019-08-27 | 万向一二三股份公司 | A kind of electrolyte wetting method of soft bag lithium ionic cell |
| CN106198123A (en) * | 2016-08-12 | 2016-12-07 | 合肥国轩高科动力能源有限公司 | A kind of gas collection method analyzed for gas generated in lithium ion battery |
| CN106198123B (en) * | 2016-08-12 | 2020-04-17 | 合肥国轩高科动力能源有限公司 | Gas collection method for analysis of gas produced in lithium ion battery |
| CN107978714A (en) * | 2017-12-27 | 2018-05-01 | 河北银隆新能源有限公司 | A kind of exhaust apparatus of lithium ion battery |
| CN108417921A (en) * | 2018-02-09 | 2018-08-17 | 浙江衡远新能源科技有限公司 | A kind of preparation method and battery of high energy density cells |
| CN109818000A (en) * | 2018-12-30 | 2019-05-28 | 武汉昊诚能源科技有限公司 | High temperature modification lithium manganese flexible-packed battery electrolyte and its method for preparing battery |
| CN111048843A (en) * | 2019-11-19 | 2020-04-21 | 深圳君耀投资合伙企业(有限合伙) | Manufacturing method of soft package lithium ion battery and soft package lithium ion battery |
| CN113707945A (en) * | 2021-07-26 | 2021-11-26 | 曙鹏科技（深圳）有限公司 | Preparation method of lithium ion battery |
| CN113707945B (en) * | 2021-07-26 | 2024-03-22 | 曙鹏科技（深圳）有限公司 | Preparation method of lithium ion battery |
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Application publication date: 20120404 |