CN113451686B - High-safety aluminum-plastic film for soft package lithium ion battery - Google Patents
High-safety aluminum-plastic film for soft package lithium ion battery Download PDFInfo
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- CN113451686B CN113451686B CN202010214871.9A CN202010214871A CN113451686B CN 113451686 B CN113451686 B CN 113451686B CN 202010214871 A CN202010214871 A CN 202010214871A CN 113451686 B CN113451686 B CN 113451686B
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a high-safety soft-package lithium ion battery aluminum plastic film which comprises a nylon outer layer, a first bonding layer, a first functional layer, an aluminum foil layer, a second functional layer, a second bonding layer and a CPP (casting polypropylene) heat sealing layer, wherein the first functional layer and the second functional layer are composed of thermoplastic resin and microcapsules. According to the invention, two thermoplastic resin/microcapsule functional layers are added in the aluminum plastic film, the thermoplastic resin has excellent elasticity, so that cracks can be prevented from being generated due to internal pressure of the aluminum foil, the barrier property and the sealing property of the aluminum plastic film are increased, and once the battery is pierced by an external object, the piercing objects pierce the microcapsules in the aluminum plastic film functional layer, so that the liquid epoxy resin of the microcapsule inner core flows out and is coated on the surface of the piercing objects, the piercing objects are insulated, thus the short circuit of a battery core is prevented, and the safety performance of the battery is improved.
Description
Technical Field
The invention belongs to the technical field of aluminum plastic films, and particularly relates to a high-safety soft package aluminum plastic film for a lithium ion battery.
Background
Because the aluminum-plastic film has low manufacturing cost and forms an indispensable important component of the liquid flexible package lithium ion battery, the aluminum-plastic composite film is taken as the shell of the battery at present and replaces the steel or aluminum shell of the common lithium ion battery, and the aluminum-plastic composite film can be roughly divided into three layers: the inner layer is a bonding layer, and is made of polyethylene or polypropylene materials mostly to play a role in sealing and bonding; the middle layer is made of aluminum foil, so that the permeation of water vapor outside the battery can be prevented, and the permeation of electrolyte inside the battery can be prevented; the outer layer is a protective layer, and is made of polyester or nylon material with high melting point, so that the battery has strong mechanical property, prevents the battery from being damaged by external force, and plays a role in protecting the battery.
But at present, the aluminum plastic film of the lithium ion battery has small contribution to safety, especially to needling, except for isolating the contact between a naked electric core and the outside. Although the chinese invention patent (CN 105405990B) has the flame retardant layer between the aluminum foil base layer and the thermoplastic resin layer of the aluminum plastic film to improve the flame retardancy of the aluminum plastic film, once the internal thermal runaway of the battery occurs, a large amount of gas will be generated, which will cause the aluminum plastic film to crack or even burn, and at this time, the aluminum plastic film with the flame retardant layer will not function. Therefore, it is urgently needed to develop an aluminum plastic film for improving the safety performance of the battery.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a high-safety soft-package aluminum-plastic film for a lithium ion battery, and aims to improve the safety performance of the lithium ion battery, reduce potential safety hazards and improve the barrier property and the pit punching property of the aluminum-plastic film.
In order to achieve the purpose, the technical scheme adopted by the invention is the high-safety soft-package aluminum-plastic film for the lithium ion battery, the aluminum-plastic film consists of a nylon outer layer, a first adhesive layer, a first functional layer, an aluminum foil layer, a second functional layer, a second adhesive layer and a CPP (casting polypropylene) heat sealing layer, and the first functional layer and the second functional layer consist of thermoplastic resin and microcapsules.
The thermoplastic resin is one or more of polyurethane, polypropylene and polyamide. Preferably, the thermoplastic resin is polyurethane.
The microcapsule is one of urea-formaldehyde resin and melamine-formaldehyde resin. Preferably, the microcapsules are urea-formaldehyde resin.
The microcapsule inner core is liquid epoxy resin.
The thickness of the first functional layer and the second functional layer is 5-20 mu m. Preferably, the thickness of the first functional layer and the second functional layer is 5-15 μm.
The first bonding layer and the second bonding layer are made of one or more of polyurethane, acrylic resin, epoxy resin and polyimide resin. Preferably, the material used for the first adhesive layer and the second adhesive layer is one or more of polyurethane and acrylic resin.
The thickness of the first bonding layer and the thickness of the second bonding layer are both 3-5 mu m.
The invention has the beneficial effects that: according to the invention, two thermoplastic resin/microcapsule functional layers are added in the aluminum plastic film, the thermoplastic resin has excellent elasticity, so that cracks can be prevented from being generated due to internal pressure of the aluminum foil, the barrier property and the sealing property of the aluminum plastic film are increased, and once the battery is pierced by an external object, the piercing objects pierce the microcapsules in the aluminum plastic film functional layer, so that the liquid epoxy resin of the microcapsule inner core flows out and is coated on the surface of the piercing objects, the piercing objects are insulated, thus the short circuit of a battery core is prevented, and the safety performance of the battery is improved.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, and the description in this section is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1:
the high-safety soft-package lithium ion battery aluminum plastic film of the embodiment is composed of a nylon outer layer, a polyurethane first adhesive layer, a thermoplastic polyurethane first functional layer, an aluminum foil layer, a thermoplastic polyurethane second functional layer, a polyurethane second adhesive layer and a CPP heat sealing layer.
The first functional layer contains urea-formaldehyde resin microcapsules, the inner core of the first functional layer is liquid epoxy resin, and the thickness of the first functional layer is 5 micrometers.
The second functional layer contains urea-formaldehyde resin microcapsules, the inner core of the second functional layer is liquid epoxy resin, and the thickness of the second functional layer is 5 micrometers.
Example 2:
the high-safety soft-package lithium ion battery aluminum plastic film of the embodiment is composed of a nylon outer layer, a polyurethane first adhesive layer, a thermoplastic polyurethane first functional layer, an aluminum foil layer, a thermoplastic polyurethane second functional layer, a polyurethane second adhesive layer and a CPP heat sealing layer.
The first functional layer contains urea-formaldehyde resin microcapsules, the inner core of the first functional layer is liquid epoxy resin, and the thickness of the first functional layer is 10 mu m.
The second functional layer contains urea-formaldehyde resin microcapsules, the inner core of the second functional layer is liquid epoxy resin, and the thickness of the second functional layer is 10 mu m.
Example 3:
the high-safety soft-package lithium ion battery aluminum plastic film of the embodiment is composed of a nylon outer layer, a polyurethane first adhesive layer, a thermoplastic polyurethane first functional layer, an aluminum foil layer, a thermoplastic polyurethane second functional layer, a polyurethane second adhesive layer and a CPP heat sealing layer.
The first functional layer contains urea-formaldehyde resin microcapsules, the inner core of the first functional layer is liquid epoxy resin, and the thickness of the first functional layer is 15 micrometers.
The second functional layer contains urea-formaldehyde resin microcapsules, the inner core of the second functional layer is liquid epoxy resin, and the thickness of the second functional layer is 15 micrometers.
Comparative example 1:
the high-safety aluminum plastic film for the soft package lithium ion battery in the comparative example consists of a nylon outer layer, a polyurethane first bonding layer, a thermoplastic polyurethane first functional layer, an aluminum foil layer, a thermoplastic polyurethane second functional layer, a polyurethane second bonding layer and a CPP heat sealing layer.
The first functional layer was 10 μm thick and contained no microcapsules.
The second functional layer was 10 μm thick and contained no microcapsules.
Comparative example 2:
the high-safety soft-package lithium ion battery aluminum plastic film of the comparative example consists of a nylon outer layer, a polyurethane first bonding layer, an aluminum foil layer, a polyurethane second bonding layer and a CPP heat sealing layer.
The high-safety soft package aluminum-plastic film for the lithium ion battery provided by the invention has the advantages that the safety performance of the lithium ion battery is obviously improved, the potential safety hazard is reduced, and the barrier property and the pit punching property of the aluminum-plastic film are improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (5)
1. The high-safety soft-package lithium ion battery aluminum plastic film is characterized by comprising a nylon outer layer, a first adhesive layer, a first functional layer, an aluminum foil layer, a second functional layer, a second adhesive layer and a CPP (casting polypropylene) heat sealing layer, wherein the first functional layer and the second functional layer are composed of thermoplastic resin and microcapsules;
the microcapsule is one of urea-formaldehyde resin and melamine-formaldehyde resin;
the microcapsule inner core is liquid epoxy resin.
2. The high-safety soft-package lithium ion battery aluminum plastic film according to claim 1, wherein the thermoplastic resin is one or more of polyurethane, polypropylene and polyamide.
3. The high-safety soft-package lithium ion battery aluminum plastic film according to claim 1, wherein the thickness of the first functional layer and the second functional layer is 5-20 μm.
4. The high-safety soft-package lithium ion battery aluminum plastic film according to claim 1, wherein the first adhesive layer and the second adhesive layer are made of one or more of polyurethane, acrylic resin, epoxy resin and polyimide resin.
5. The high-safety soft-package lithium ion battery aluminum plastic film as claimed in claim 1, wherein the thickness of the first adhesive layer and the second adhesive layer is 3-5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214871.9A CN113451686B (en) | 2020-03-24 | 2020-03-24 | High-safety aluminum-plastic film for soft package lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010214871.9A CN113451686B (en) | 2020-03-24 | 2020-03-24 | High-safety aluminum-plastic film for soft package lithium ion battery |
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| Publication Number | Publication Date |
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| CN113451686A CN113451686A (en) | 2021-09-28 |
| CN113451686B true CN113451686B (en) | 2022-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114335827B (en) * | 2021-12-20 | 2024-04-02 | 广东广麟材耀新能源材料有限公司 | Anti-cracking aluminum plastic film |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602081A (en) * | 2012-03-16 | 2012-07-25 | 东莞市恒雅包装材料有限公司 | Anti-corrosion, anti-puncture and anti-short circuit melting through aluminum-plastic packaging film for lithium battery and manufacture method thereof |
| CN204558556U (en) * | 2015-02-10 | 2015-08-12 | 江阴骏驰光电科技有限公司 | A kind of lithium battery plastic-aluminum packaging film containing two foam films |
| JP2016186927A (en) * | 2015-03-27 | 2016-10-27 | 大日本印刷株式会社 | Wrapping material for battery |
| CN108155307A (en) * | 2017-12-21 | 2018-06-12 | 桑德集团有限公司 | Aluminum plastic film and application thereof |
| CN208014751U (en) * | 2018-04-24 | 2018-10-26 | 苏州福斯特光伏材料有限公司 | Flexible packing material for lithium ion battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1038792A1 (en) * | 1999-03-19 | 2000-09-27 | The Procter & Gamble Company | Improved packaged article |
| JP5278636B2 (en) * | 2005-08-31 | 2013-09-04 | 凸版印刷株式会社 | Lithium battery packaging material |
| CN206460979U (en) * | 2016-09-26 | 2017-09-01 | 东莞市卓越新材料科技有限公司 | The aluminum plastic film of good flame resistance |
| CN208438826U (en) * | 2018-06-29 | 2019-01-29 | 新纶复合材料科技（常州）有限公司 | A kind of high-barrier high leakproofness lithium ion battery aluminum plastic film |
| CN109449319B (en) * | 2018-10-24 | 2021-07-30 | 无锡恩捷新材料科技有限公司 | Aluminum-plastic film for soft package lithium ion battery |
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2020
- 2020-03-24 CN CN202010214871.9A patent/CN113451686B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602081A (en) * | 2012-03-16 | 2012-07-25 | 东莞市恒雅包装材料有限公司 | Anti-corrosion, anti-puncture and anti-short circuit melting through aluminum-plastic packaging film for lithium battery and manufacture method thereof |
| CN204558556U (en) * | 2015-02-10 | 2015-08-12 | 江阴骏驰光电科技有限公司 | A kind of lithium battery plastic-aluminum packaging film containing two foam films |
| JP2016186927A (en) * | 2015-03-27 | 2016-10-27 | 大日本印刷株式会社 | Wrapping material for battery |
| CN108155307A (en) * | 2017-12-21 | 2018-06-12 | 桑德集团有限公司 | Aluminum plastic film and application thereof |
| CN208014751U (en) * | 2018-04-24 | 2018-10-26 | 苏州福斯特光伏材料有限公司 | Flexible packing material for lithium ion battery |
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| CN113451686A (en) | 2021-09-28 |
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Effective date of registration: 20221021 Address after: 523000 Building 9, Dasheng Industrial City, No. 1438, Provincial Road S358, Shangsha Community, Chang'an Town, Dongguan City, Guangdong Province Patentee after: Dongguan Grind Energy Co.,Ltd. Address before: 518105 4th floor, building A2, industrial park, 168 Honghu Road, Yanchuan, Songgang, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN GRAND POWERSOURCE Co.,Ltd. |
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