CN203418816U - Soft lithium battery packaging film prepared according to salivation method - Google Patents
Soft lithium battery packaging film prepared according to salivation method Download PDFInfo
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- CN203418816U CN203418816U CN201320483024.8U CN201320483024U CN203418816U CN 203418816 U CN203418816 U CN 203418816U CN 201320483024 U CN201320483024 U CN 201320483024U CN 203418816 U CN203418816 U CN 203418816U
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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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Abstract
The utility model discloses a soft lithium battery packaging film prepared according to the salivation method. The main points of the technical scheme of the utility model are as follows: the soft lithium battery packaging film sequentially comprises a heat-proof resin film layer, an aluminum foil core layer and a thermoplastic resin film layer from outside to inside, wherein the aluminum foil core layer is in co-extrusion lamination with the heat-proof resin film layer and the thermoplastic resin film layer through an adhesive layer and a thermoplastic elastomer bonding layer respectively by adopting the salivation method; the aluminum foil core layer is made of tensile aluminum foil in zero state, and is 45-65 Mum in thickness. The soft lithium battery packaging film provided by the utility model has the advantages that on the premise that the cost is not increased, the soft lithium battery packaging film with solvent corrosion resistance and excellent performance is prepared by adopting a chrome-free environmentally-friendly chemical conversion treatment process and a mature stable synthetic process.
Description
Technical field
The utility model relates to a kind of plastic-aluminum combined flexible packaging film, is specifically related to lithium battery flexible packaging film prepared by a kind of casting method.
Background technology
At present, the flexible packaging film that lithium battery is used consists of heat-resistant resin film layer, adhesive layer, aluminium foil sandwich layer, bonding resin layer and hot sealing layer, heat-resistant resin film layer is generally polyamide PA and/or PET PET material, aluminium foil sandwich layer is soft aluminium foil, chemical conversion layer is generally phosphoric acid-chromate system, hot sealing layer common are polyethylene, polypropylene and their modifier, in indivedual patent documents, also recorded the more excellent material of Performance Ratio, as ionomer and acid polymer etc.At home in the patent of certain enterprise, heat-resistant resin film layer also has uses polyimides.Although the technical scheme in the patent that constituent parts and individual declare has almost been included various material therefors, but material conventional on market is mainly aramid layer/adhesive/aluminium foil sandwich layer/conversion coating or adhesive phase/polyethylene or polypropylene with structure, this infrastructure cost is cheap, can meet the needs of lithium battery flexible packaging film, other with high costs, does not possess the market competitiveness.Yet the hot sealing layer solvent resistance of polyethylene or polypropylene series is general in the structure of recording, solvent may be from hot sealing layer, and especially its fault location passes through, and corrodes internal layer adhesive layer and aluminium foil sandwich layer; In addition, this structure is subject to technique, equipment, quality control ability restriction in process of production, to such an extent as to the like product quality that domestic enterprise produces is quite unstable, phosphoric acid-chromate system that its chemical transforming process adopts, contain heavy metal element, easily environment is produced and polluted.
Adopt dry laminating, use adhesive to carry out bonding, the punching hole degree of depth is large, aluminium foil does not need through baking oven, can be because of the generation embrittlement of being heated for a long time, but because contain adhesive, be easily subject to electrolyte that infiltration comes and corrode and spot corrosion occurs lost efficacy, finally make packaging film aluminium foil be corroded, affect battery life; Employing pressure sintering is compound, does not use adhesive, has avoided the situation of adhesive failure, intercepts electrolyte ability stronger, but because aluminium foil will be heated for a long time, embrittlement easily occurs, and strength decreased, therefore also has drawback.
Summary of the invention
General in order to overcome existing lithium battery flexible packaging film hot sealing layer solvent resistance, quality is unstable processes the shortcoming containing not environmental protection of chromium with chemical conversion, the lithium battery flexible packaging film that the utility model provides a kind of casting method to prepare, this flexible packaging film is used the chemical conversion treatment process that does not contain chromium element, use the heat-sealable material of the good especially medium-priced of solvent resistance, and mature production technology, quality stability is high.
The technical scheme that the utility model technical solution problem adopts is: lithium battery flexible packaging film prepared by a kind of casting method, it is provided with successively from outside to inside heat-resistant resin film layer, aluminium foil sandwich layer and intercepts hot sealing layer, aluminium foil sandwich layer adopts casting method coextru-lamination moulding with heat-resistant resin film layer and obstruct hot sealing layer by adhesive phase and thermoplastic elastomer (TPE) adhesive linkage respectively, it is characterized in that: described aluminium foil sandwich layer is 0 state stretching aluminium foil, and the thickness of this aluminium foil sandwich layer is 45-65 μ m.
Obstruct hot sealing layer described in the utility model is cyclic olefin polymer and poly mixture, and wherein the quality percentage composition of cyclic olefin polymer in intercepting hot sealing layer is 15%-35%; Between described aluminium foil sandwich layer and adhesive phase and thermoplastic elastomer (TPE) adhesive linkage, be respectively equipped with the first chemical conversion layer and the second chemical conversion layer, this first chemical conversion layer and the second chemical conversion layer are that aluminium foil sandwich layer forms through tannin acid system, phytic acid+silane coupler method or organosilan forensic chemistry conversion processing; Described heat-resistant resin film layer is polyamide film layer, and polyamide is polyamide 6, polyamide 66, polyamide 610, polyamide 612, polyamide 1010, polyamide 1012 or polyamide 1212; Described adhesive phase is polyurethane adhesive or flexible-epoxy; Described thermoplastic elastomer (TPE) adhesive linkage is ethylene acrylic acid co polymer or the ethylene/vinyl alcohol copolymer that is added with maleic anhydride grafted polyethylene, and wherein the quality addition of maleic anhydride grafted polyethylene is 5%-15%.
Lithium battery flexible packaging film prepared by casting method described in the utility model, it is characterized in that: the thickness of described heat-resistant resin film layer is 15-30 μ m, the thickness of adhesive phase is 3 μ m, the thickness of aluminium foil sandwich layer is 45-65 μ m, the thickness of the first chemical conversion layer and the second chemical conversion layer is respectively below 1 μ m, the thickness of thermoplastic elastomer (TPE) adhesive linkage is 10-20 μ m, and the thickness that intercepts hot sealing layer is 20-50 μ m.
The preparation method of lithium battery flexible packaging film prepared by casting method described in the utility model, it is characterized in that step is as follows: aluminium foil sandwich layer is formed respectively to the first chemical conversion layer and the second chemical conversion layer through tannin acid system, phytic acid+silane coupler method or organosilan method conversion processing, and the second chemical conversion layer adopts casting method coextrusion mold with the obstruct hot sealing layer that is added with the ethylene acrylic acid co polymer of maleic anhydride grafted polyethylene or thermoplastic elastomer (TPE) adhesive linkage, cyclic olefine copolymer and polyethylene blend formation that ethylene/vinyl alcohol copolymer forms; Product after casting method coextrusion mold carries out dry laminating with adhesive by heat-resistant resin film layer and the first chemical conversion layer, makes lithium battery flexible packaging film prepared by casting method.
The detailed process of aluminium foil sandwich layer tannin acid system described in the utility model is: the chemical converting agent that is equipped with following concentration: tannic acid 8.2g/L, phosphoric acid 0.04g/L, F
-0.4g/L, Ti salt 0.05g/L, with NaOH, regulate and keep pH value=4.9, first with ethyl acetate, clean aluminium foil surface greasy dirt, then at conversion temperature 30-60 ℃, under the condition of spray time 5-50 second, aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of oven dry of online drying plant.
The detailed process of aluminium foil sandwich layer phytic acid+silane coupler method described in the utility model is: the chemical converting agent that is equipped with following concentration: ammonium titanium fluoride 10g/L, phytic acid 16g/L, silica gel 30g/L, the PVA(degree of polymerization 1400) 50g/L, with NaOH, regulate and keep pH value=5.3, first with ethyl acetate, clean aluminium foil surface greasy dirt, then use spreader with 10mg/m
2coating weight aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of hot air circulation wind of online drying plant to dry, the collocation method wiring solution-forming that silane coupler is provided by manufacturer, is coated on the one side of aluminium foil conversion coating with plasma method, again dry.
The detailed process of aluminium foil sandwich layer organosilan method described in the utility model is: the chemical converting agent that is equipped with following concentration: ammonium titanium fluoride 10g/L, phytic acid 16g/L, silica gel 30g/L, the PVA(degree of polymerization 1400) 50g/L, with NaOH, regulate and keep pH value=5.3, first with ethyl acetate, clean aluminium foil surface greasy dirt, then use spreader with 10mg/m
2coating weight aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of hot air circulation wind of online drying plant to dry.
The adhesive that the utility model is used and binder resin materials'use are suitable for large polyurethane adhesive or flexible-epoxy adhesive and the thermoplastic elastomer (TPE) adhesives of the temperature difference, flexible large, the test that colds and heat succeed each other of can stand-40-65 ℃; The material that hot sealing layer selected technology is ripe, combined strength bination is high, has improved lithium battery greatly in the sealing continuing under vibrations condition; Do not increasing under the prerequisite of cost, adopting the chemical conversion treatment process of chromium-free environment-friendly and mature and stable synthesis technique, preparing the lithium battery flexible packaging film of resistance to solvent corrosion and excellent performance.
The utility model is used casting method compound, has extraordinary combination property.Adopt dry laminating, use adhesive to carry out bonding, the punching hole degree of depth is large, aluminium foil does not need through baking oven, can be because of the generation embrittlement of being heated for a long time, but because contain adhesive, be easily subject to electrolyte that infiltration comes and corrode and spot corrosion occurs lost efficacy, finally make packaging film aluminium foil be corroded, affect battery life; Employing pressure sintering is compound, does not use adhesive, has avoided the situation of adhesive failure, intercepts electrolyte ability stronger, but because aluminium foil will be heated for a long time, embrittlement easily occurs, and strength decreased, therefore also has drawback.Adopt casting method, internal layer is not used adhesive, and aluminium foil also needn't pass through long-time high-temperature baking, and can bring into play well the above two advantage and keep away that it is short, be a kind of advanced person's combination process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Drawing explanation: 1, heat-resistant resin film layer, 2, adhesive phase, the 3, first chemical conversion layer, 4, aluminium foil sandwich layer, the 5, second chemical conversion layer, 6, thermoplastic elastomer (TPE) adhesive linkage, 7, intercept hot sealing layer.
The specific embodiment
Describe by reference to the accompanying drawings embodiment in detail.Lithium battery flexible packaging film prepared by a kind of casting method, it is provided with successively from outside to inside heat-resistant resin film layer 1, aluminium foil sandwich layer 4 and intercepts hot sealing layer 7, aluminium foil sandwich layer 4 adopts casting method coextru-lamination moulding with heat-resistant resin film layer 1 and obstruct hot sealing layer 7 by adhesive phase 2 and thermoplastic elastomer (TPE) adhesive linkage 6 respectively, described aluminium foil sandwich layer 4 is 0 state stretching aluminium foil, and the thickness of this aluminium foil sandwich layer 4 is 45-65 μ m.
Obstruct hot sealing layer 7 described in the utility model is cyclic olefin polymer and poly mixture, heat seal strength is high, durability against pollution is strong, polar solvent good barrier property, does not affect heat-sealing even if be stained with solvent yet, even still can stably keep its stability under the condition that continues vibrations, wherein the quality percentage composition of cyclic olefin polymer in intercepting hot sealing layer is 15%-35%, cyclic olefin polymer joins in polyethylene, and heat seal strength can be fully enhanced, good barrier property; Between described aluminium foil sandwich layer 4 and adhesive phase 2 and thermoplastic elastomer (TPE) adhesive linkage 6, be respectively equipped with the first chemical conversion layer 3 and the second chemical conversion layer 5, this first chemical conversion layer 3 and the second chemical conversion layer 5 are that aluminium foil sandwich layer 4 forms through tannin acid system, phytic acid+silane coupler method or organosilan forensic chemistry conversion processing, in the situation that cost does not increase, the chemical conversion treatment process of employing chromium-free environment-friendly can be prepared the lithium battery flexible packaging film of resistance to solvent corrosion and excellent performance; Described heat-resistant resin film layer 1 is polyamide film layer, and polyamide is polyamide 6, polyamide 66, polyamide 610, polyamide 612, polyamide 1010, polyamide 1012 or polyamide 1212; Described adhesive phase 2 is polyurethane adhesive or flexible-epoxy; Described thermoplastic elastomer (TPE) adhesive linkage 6 is for being added with ethylene acrylic acid co polymer or the ethylene/vinyl alcohol copolymer of maleic anhydride grafted polyethylene, wherein the quality addition of maleic anhydride grafted polyethylene is 5%-15%, used flexible good thermoplastic elastomer (TPE) adhesives to replace common binder resin, flexible, under low temperature environment, still can keep good combined strength bination and flexibility, can resist lasting vibrations.
The preparation method of lithium battery flexible packaging film prepared by casting method described in the utility model, step is as follows: aluminium foil sandwich layer 4 is formed respectively to the first chemical conversion layer 3 and the second chemical conversion layer 5, the second chemical conversion layers 5 and the obstruct hot sealing layer 7 employing casting method coextrusion molds that are added with the ethylene acrylic acid co polymer of maleic anhydride grafted polyethylene or thermoplastic elastomer (TPE) adhesive linkage 6, cyclic olefine copolymer and polyethylene blend formation that ethylene/vinyl alcohol copolymer forms through tannin acid system, phytic acid+silane coupler method or organosilan method conversion processing; Product after casting method coextrusion mold carries out dry laminating with adhesive by heat-resistant resin film layer 1 and the first chemical conversion layer 3, make the lithium battery flexible packaging film of resistance to solvent corrosion, in the interior trilaminate material of this flexible packaging film, be the material that contains a large amount of vinyl groups, compatibility is better.
The detailed process of aluminium foil sandwich layer tannin acid system described in the utility model is: the chemical converting agent that is equipped with following concentration: tannic acid 8.2g/L, phosphoric acid 0.04g/L, F
-0.4g/L, Ti salt 0.05g/L, with NaOH, regulate and keep pH value=4.9, first with ethyl acetate, clean aluminium foil surface greasy dirt, then at conversion temperature 30-60 ℃, under the condition of spray time 5-50 second, aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of oven dry of online drying plant.
The detailed process of aluminium foil sandwich layer phytic acid+silane coupler method described in the utility model is: the chemical converting agent that is equipped with following concentration: ammonium titanium fluoride 10g/L, phytic acid 16g/L, silica gel 30g/L, the PVA(degree of polymerization 1400) 50g/L, with NaOH, regulate and keep pH value=5.3, first with ethyl acetate, clean aluminium foil surface greasy dirt, then use spreader with 10mg/m
2coating weight aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of hot air circulation wind of online drying plant to dry, the collocation method wiring solution-forming that silane coupler is provided by manufacturer, is coated on the one side of aluminium foil conversion coating with plasma method, again dry.
The detailed process of aluminium foil sandwich layer organosilan method described in the utility model is: the chemical converting agent that is equipped with following concentration: ammonium titanium fluoride 10g/L, phytic acid 16g/L, silica gel 30g/L, the PVA(degree of polymerization 1400) 50g/L, with NaOH, regulate and keep pH value=5.3, first with ethyl acetate, clean aluminium foil surface greasy dirt, then use spreader with 10mg/m
2coating weight aluminium foil is carried out to chemical conversion processing, and use 120 ℃ of hot air circulation wind of online drying plant to dry.
Lithium battery flexible packaging film prepared by casting method described in the utility model, the thickness of wherein said heat-resistant resin film layer is 15-30 μ m, the thickness of adhesive phase is 3 μ m, the thickness of aluminium foil sandwich layer is 45-65 μ m, the thickness of the first chemical conversion layer and the second chemical conversion layer is respectively below 1 μ m, the thickness of thermoplastic elastomer (TPE) adhesive linkage is 10-20 μ m, and the thickness that intercepts hot sealing layer is 20-50 μ m.
Claims (5)
1. a lithium battery flexible packaging film prepared by casting method, it is provided with successively from outside to inside heat-resistant resin film layer, aluminium foil sandwich layer and intercepts hot sealing layer, aluminium foil sandwich layer adopts casting method coextru-lamination moulding with heat-resistant resin film layer and obstruct hot sealing layer by adhesive phase and thermoplastic elastomer (TPE) adhesive linkage respectively, it is characterized in that: described aluminium foil sandwich layer is 0 state stretching aluminium foil, and the thickness of this aluminium foil sandwich layer is 45-65 μ m.
2. the lithium battery flexible packaging film that prepared by casting method according to claim 1, it is characterized in that: between described aluminium foil sandwich layer and adhesive phase and thermoplastic elastomer (TPE) adhesive linkage, be respectively equipped with the first chemical conversion layer and the second chemical conversion layer, this first chemical conversion layer and the second chemical conversion layer are that aluminium foil sandwich layer forms through tannin acid system, phytic acid+silane coupler method or organosilan forensic chemistry conversion processing.
3. the lithium battery flexible packaging film that prepared by casting method according to claim 1, it is characterized in that: described heat-resistant resin film layer is polyamide film layer, polyamide is polyamide 6, polyamide 66, polyamide 610, polyamide 612, polyamide 1010, polyamide 1012 or polyamide 1212.
4. the lithium battery flexible packaging film that prepared by casting method according to claim 1, is characterized in that: described adhesive phase is polyurethane adhesive or flexible-epoxy.
5. the lithium battery flexible packaging film that prepared by casting method according to claim 1, it is characterized in that: the thickness of described heat-resistant resin film layer is 15-30 μ m, the thickness of adhesive phase is 3 μ m, the thickness of aluminium foil sandwich layer is 45-65 μ m, the thickness of the first chemical conversion layer and the second chemical conversion layer is respectively below 1 μ m, the thickness of thermoplastic elastomer (TPE) adhesive linkage is 10-20 μ m, and the thickness that intercepts hot sealing layer is 20-50 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320483024.8U CN203418816U (en) | 2013-08-08 | 2013-08-08 | Soft lithium battery packaging film prepared according to salivation method |
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| CN201320483024.8U CN203418816U (en) | 2013-08-08 | 2013-08-08 | Soft lithium battery packaging film prepared according to salivation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395244A (en) * | 2013-08-08 | 2013-11-20 | 河南李烨包装科技有限公司 | Lithium battery flexible packaging film prepared through tape casting and preparation method thereof |
| CN110408104A (en) * | 2019-07-20 | 2019-11-05 | 张斌 | A kind of innermost layer film based on lithium ion battery package compound film |
-
2013
- 2013-08-08 CN CN201320483024.8U patent/CN203418816U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395244A (en) * | 2013-08-08 | 2013-11-20 | 河南李烨包装科技有限公司 | Lithium battery flexible packaging film prepared through tape casting and preparation method thereof |
| CN103395244B (en) * | 2013-08-08 | 2015-07-08 | 河南李烨包装科技有限公司 | Lithium battery flexible packaging film prepared through tape casting and preparation method thereof |
| CN110408104A (en) * | 2019-07-20 | 2019-11-05 | 张斌 | A kind of innermost layer film based on lithium ion battery package compound film |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20150808 |
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| EXPY | Termination of patent right or utility model |