CN114335737A - Method for edge sealing of flexible package lithium ion battery and lithium ion battery - Google Patents
Method for edge sealing of flexible package lithium ion battery and lithium ion battery Download PDFInfo
- Publication number
- CN114335737A CN114335737A CN202111538594.8A CN202111538594A CN114335737A CN 114335737 A CN114335737 A CN 114335737A CN 202111538594 A CN202111538594 A CN 202111538594A CN 114335737 A CN114335737 A CN 114335737A
- Authority
- CN
- China
- Prior art keywords
- flexible package
- lithium ion
- ion battery
- resin coating
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000007789 sealing Methods 0.000 title claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 238000000576 coating method Methods 0.000 claims abstract description 40
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000009501 film coating Methods 0.000 claims abstract description 7
- 239000002985 plastic film Substances 0.000 claims abstract description 6
- 229920006255 plastic film Polymers 0.000 claims abstract description 6
- 239000002313 adhesive film Substances 0.000 claims abstract description 5
- 239000000839 emulsion Substances 0.000 claims description 15
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 5
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 239000004908 Emulsion polymer Substances 0.000 claims description 3
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000011185 multilayer composite material Substances 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims 1
- 238000009459 flexible packaging Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a method for sealing edges of a flexible package lithium ion battery, which comprises the following steps: step one, coating a resin coating on the edge folding position of a flexible package of a lithium ion battery; drying the resin coating under preset conditions to enable the resin coating to be adhered to the outer layer of the folded edge of the flexible package; and step three, after the resin coating is cured, forming an elastic adhesive film coating at the edge folding position of the flexible package so as to form an edge folding included angle at the edge folding position of the flexible package. The aluminum layer of the flexible package aluminum-plastic film can not generate sharp folding angles, and the problem that the folding edge position is damaged can be effectively avoided in the whole life cycle of the battery.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery manufacturing, and particularly relates to a method for edge sealing of a flexible package lithium ion battery and the lithium ion battery.
Background
Along with the lithium cell is more and more extensive, current soft-packing lithium ion battery adopts the plastic-aluminum membrane encapsulation, in order to improve the volume energy density of battery package, the seal can be rolled up and erect in two sides of electric core, in the use of reality, electric automobile and electric bicycle often accelerate, the operating mode of speed reduction, the position of the plastic-aluminum membrane hem of battery can receive electric core main part and the repeated extrusion of battery structure spare, the plastic-aluminum membrane is rolled up repeatedly for a long time, loosen, the aluminium lamination of plastic-aluminum membrane can be tired, the aluminium lamination of plastic-aluminum membrane can take place to break after accumulating to certain degree, the sealed inefficacy takes place for the soft-packing electric core, active ingredient in the air, water, oxygen, inside carbon dioxide etc. permeate the soft-packing electric core, the gas of electric core expands, the weeping, lead to the battery inefficacy. Because part power battery is not hem, four sides around the lithium ion battery adopt the centre gripping of plastic frame, do not have the damaged hidden danger of hem. The technical scheme has the defects and problems that a plastic frame is required to be arranged, and the design cost and the process cost are high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for sealing edges of a flexible package lithium ion battery and the lithium ion battery thereof.
In order to achieve the above object, a first aspect of the present invention provides a method for edge sealing of a flexible package lithium ion battery, comprising the following steps:
step one, coating a resin coating on the edge folding position of a flexible package of a lithium ion battery;
drying the resin coating under preset conditions to enable the resin coating to be adhered to the outer layer of the folded edge of the flexible package;
and step three, after the resin coating is cured, forming an elastic adhesive film coating at the edge folding position of the flexible package, so that an edge folding included angle is formed at the edge folding position of the flexible package.
Preferably, the flexible package is made of an aluminum plastic film, and the aluminum plastic film is a multi-layer composite material consisting of various plastics, aluminum foil and adhesives.
Preferably, the fold included angle is an angle R.
Preferably, the resin coating is a dispersion of resin or an emulsion of resin, and the resin coating includes polyacrylic resin, styrene-butadiene rubber emulsion, chloroprene rubber solution, natural rubber emulsion, styrene-acrylic rubber emulsion, vinyl acetate-acrylic emulsion, and ethylene-vinyl acetate copolymer Emulsion (EVA).
Preferably, the drying the resin coating under the preset condition comprises: the resin coating of the flexible package is naturally dried by standing at room temperature, or the resin coating of the flexible package is dried by an air blower at room temperature.
A lithium ion battery is packaged by a flexible package, and based on the edge sealing method of the flexible package lithium ion battery, a viscoelastic glue film coating is formed on the outer layer of a folded edge of the flexible package, so that a folded edge included angle is formed at the folded edge position of the flexible package.
Compared with the prior art, the invention has the following beneficial effects:
the method is simple to implement, and can prevent the problem of liquid leakage failure in the practical application process of the power battery.
Drawings
Fig. 1 is a schematic view of an edge banding structure of an edge banding of a flexible package lithium ion battery in embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of an edge seal of a flexible package lithium ion battery in embodiment 1 of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.
Example 1
As shown in fig. 1-2, a method for edge sealing of a flexible package lithium ion battery, which can be applied to a process of edge sealing of a battery in a production process of a flexible package lithium ion battery, may include the following steps:
firstly, a resin coating 3 is coated at the edge folding position of a flexible package 2 of a lithium ion battery 1, preferably, the flexible package 1 is made of an Aluminum-plastic Film (ALF), and the ALF is a multi-layer composite material consisting of various plastics, Aluminum foil and adhesives.
And step two, drying the resin coating 3 under preset conditions to enable the resin coating 3 to be adhered to the outer layer of the folded edge of the flexible package 2, and preferably, curing the resin coating by adopting natural air drying.
And step three, after the resin coating is cured, forming an elastic adhesive film coating at the edge folding position of the flexible package, so that an edge folding included angle is formed at the edge folding position of the flexible package.
Preferably, the fold included angle is an angle R. The thickness of the resin coating is >0.1mm, and the R angle is naturally formed due to the elastic action of the resin coating.
Preferably, the resin coating is a dispersion of resin or an emulsion of resin, and the resin coating includes polyacrylic resin, styrene-butadiene rubber emulsion, chloroprene rubber solution, natural rubber emulsion, styrene-acrylic rubber emulsion, vinyl acetate-acrylic emulsion, and ethylene-vinyl acetate copolymer Emulsion (EVA). Preferably, the drying the resin coating under the preset condition comprises: the resin coating of the flexible package is naturally dried by standing at room temperature, or the resin coating of the flexible package is dried by a blower at room temperature. After air drying, the coating was formed into a solid state with a resin coating, and the drying was completed with no apparent fluidity of the coating visually.
A lithium ion battery is packaged by a flexible package, and based on the edge sealing method of the flexible package lithium ion battery, a viscoelastic glue film coating is formed on the outer layer of a folded edge of the flexible package, so that a folded edge included angle is formed at the folded edge position of the flexible package.
The method is simple to implement, and can prevent the problem of liquid leakage failure in the practical application process of the power battery.
In the description herein, references to the description of the term "in an embodiment," "in another embodiment," "exemplary" or "in a particular embodiment," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. A method for edge sealing of a flexible package lithium ion battery is characterized in that: the method comprises the following steps:
step one, coating a resin coating on the edge folding position of a flexible package of a lithium ion battery;
drying the resin coating under a preset condition to enable the resin coating to be adhered to the outer layer of the folded edge of the flexible package;
and step three, after the resin coating is cured, forming an elastic adhesive film coating at the edge folding position of the flexible package, so that an edge folding included angle is formed at the edge folding position of the flexible package.
2. The method for edge sealing of a lithium ion battery with a flexible package according to claim 1, wherein the flexible package is made of an aluminum-plastic film, and the aluminum-plastic film is a multi-layer composite material consisting of various plastics, aluminum foil and adhesives.
3. The method for edge sealing of the flexible package lithium ion battery according to claim 1, wherein the included angle of the folded edge is an angle R.
4. The method for edge sealing of a flexible package lithium ion battery according to claim 1, wherein the resin coating is a dispersion of resin or an emulsion of resin, and the resin coating comprises polyacrylic resin, styrene-butadiene rubber emulsion, neoprene solution, natural rubber emulsion, styrene-acrylic rubber emulsion, vinyl acetate-acrylic emulsion and ethylene-vinyl acetate copolymer emulsion.
5. The method of edge sealing for a flexible packaging lithium ion battery according to claim 1, wherein the drying the resin coating under predetermined conditions comprises: the resin coating of the flexible package is naturally dried by standing at room temperature, or the resin coating of the flexible package is dried by blowing air at room temperature.
6. A lithium ion battery is packaged by a flexible package, and is characterized in that based on the edge sealing method of the flexible package lithium ion battery as claimed in any one of claims 1 to 5, an elastic adhesive film coating is formed on the outer layer of a folded edge of the flexible package, so that a folded edge included angle is formed at the folded edge position of the flexible package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538594.8A CN114335737B (en) | 2021-12-15 | 2021-12-15 | Method for sealing edges of flexible package lithium ion battery and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111538594.8A CN114335737B (en) | 2021-12-15 | 2021-12-15 | Method for sealing edges of flexible package lithium ion battery and lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114335737A true CN114335737A (en) | 2022-04-12 |
| CN114335737B CN114335737B (en) | 2024-03-29 |
Family
ID=81053373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111538594.8A Active CN114335737B (en) | 2021-12-15 | 2021-12-15 | Method for sealing edges of flexible package lithium ion battery and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114335737B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001319630A (en) * | 2000-05-10 | 2001-11-16 | Nec Corp | Film seal type battery and its manufacturing method |
| CN101317285A (en) * | 2005-11-28 | 2008-12-03 | 株式会社Lg化学 | Small battery pack employing pcm on side sealing part |
| CN201562697U (en) * | 2009-09-11 | 2010-08-25 | 黄友林 | High energy safe lithium ion battery metal polymer composite shell |
| CN102969533A (en) * | 2012-07-10 | 2013-03-13 | 东莞新能源科技有限公司 | Flanging structure of soft package lithium ion battery and its making method |
| WO2014168397A1 (en) * | 2013-04-11 | 2014-10-16 | 주식회사 엘지화학 | Battery cell having rounded corner |
| US20160218327A1 (en) * | 2015-01-22 | 2016-07-28 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| CN207818631U (en) * | 2017-11-17 | 2018-09-04 | 宁德新能源科技有限公司 | Battery |
| CN110534812A (en) * | 2019-10-07 | 2019-12-03 | 南理工泰兴智能制造研究院有限公司 | A kind of Full-automatic lithium battery ion polymer cell side edge bending four-in-one device |
| JP2020017469A (en) * | 2018-07-27 | 2020-01-30 | マクセルホールディングス株式会社 | Laminated battery and manufacturing method thereof |
| CN210092147U (en) * | 2019-07-05 | 2020-02-18 | 珠海冠宇电池有限公司 | Soft package lithium ion battery edge sealing structure |
| CN113097608A (en) * | 2021-03-29 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
-
2021
- 2021-12-15 CN CN202111538594.8A patent/CN114335737B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001319630A (en) * | 2000-05-10 | 2001-11-16 | Nec Corp | Film seal type battery and its manufacturing method |
| CN101317285A (en) * | 2005-11-28 | 2008-12-03 | 株式会社Lg化学 | Small battery pack employing pcm on side sealing part |
| CN201562697U (en) * | 2009-09-11 | 2010-08-25 | 黄友林 | High energy safe lithium ion battery metal polymer composite shell |
| CN102969533A (en) * | 2012-07-10 | 2013-03-13 | 东莞新能源科技有限公司 | Flanging structure of soft package lithium ion battery and its making method |
| WO2014168397A1 (en) * | 2013-04-11 | 2014-10-16 | 주식회사 엘지화학 | Battery cell having rounded corner |
| US20160218327A1 (en) * | 2015-01-22 | 2016-07-28 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| CN207818631U (en) * | 2017-11-17 | 2018-09-04 | 宁德新能源科技有限公司 | Battery |
| JP2020017469A (en) * | 2018-07-27 | 2020-01-30 | マクセルホールディングス株式会社 | Laminated battery and manufacturing method thereof |
| CN210092147U (en) * | 2019-07-05 | 2020-02-18 | 珠海冠宇电池有限公司 | Soft package lithium ion battery edge sealing structure |
| CN110534812A (en) * | 2019-10-07 | 2019-12-03 | 南理工泰兴智能制造研究院有限公司 | A kind of Full-automatic lithium battery ion polymer cell side edge bending four-in-one device |
| CN113097608A (en) * | 2021-03-29 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114335737B (en) | 2024-03-29 |
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