CN204991819U - Lithium ion battery is plastic -aluminum complex film for soft -packing - Google Patents
Lithium ion battery is plastic -aluminum complex film for soft -packing Download PDFInfo
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- CN204991819U CN204991819U CN201520749060.3U CN201520749060U CN204991819U CN 204991819 U CN204991819 U CN 204991819U CN 201520749060 U CN201520749060 U CN 201520749060U CN 204991819 U CN204991819 U CN 204991819U
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- polyvinylidene fluoride
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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
Abstract
The utility model provides a lithium ion battery is plastic -aluminum complex film for soft -packing, is provided with the polyvinylidene fluoride layer, polyvinylidene fluoride layer adhesion in the surface on aluminium foil layer including the isolation layer, plastic -aluminum layer and the adhesive layer that set gradually between isolation layer and plastic -aluminum layer, be provided with the protective layer between plastic -aluminum layer and adhesive layer, the protective layer be dual protective structure, be the combination layer of adopting the arbitrary two -layer constitution in crome metal layer, thermosetting type plastic layer, the polyvinylidene fluoride layer. The complex film corrosive liquids that can effectively avoid the battery pass through the adhesive layer infiltration and corrode the aluminium foil layer, ensure that adhesive layer does not drop, battery side support bar improves the life of packaging film to the electrolyte that can guarantee the battery does not receive plastic -aluminum complex film material composition's pollution, guarantees the stable performance of battery.
Description
Technical field
The utility model relates to field of batteries, particularly relates to a kind of lithium ion battery flexible package aluminum-plastic composite membrane.
Background technology
In use discharge gas for metal current shell packaging lithium battery, pressure increase easily causes the problem of exploding, and starts on the market to release a kind of novel flexible packing material, i.e. aluminum-plastic composite membrane.This packaging material due to the release pressure that can expand, thus prevent blast.I.e. existing flexible packing material shown in Fig. 1, comprises separator 1, aluminium foil layer 2 and adhesive layer 3.But this flexible packing material, the corrosive liquids of lithium battery can be oozed out by adhesive layer 3 usually and directly etching aluminium foil layer is surperficial, thus the adhesive layer being attached to aluminium foil layer surface is come off, and packaging film lost efficacy, thus battery failure.Adhesive layer is generally polyacrylic acid, curtain coating or the mode such as to extrude directly drench film forming on plastic-aluminum, its adhesive strength is lower, the requirement of battery can not be met, introducing adhesive is compound on aluminium foil by polypropylene screen bonding, because lithium ion battery is organic electrolyte solvents, easily penetrates adhesive layer contact bonding agent, thus electrolyte is polluted, affect the performance of battery.
Due to lithium battery, now oneself is widely used in the portable batteries such as mobile phone and the electrical source of power such as electric tool, electric motor car.Because purposes is different, the flexible package lithium cell of aluminum-plastic composite membrane is adopted to require the performance and used life of aluminum-plastic composite membrane also different.Need long-life aluminum plastic film, namely have higher requirement to corrosion resistance, and in Long-Time Service, ensure the stable performance of battery.The present situation of above-mentioned aluminum-plastic composite membrane restricts and limits the application and development of lithium ion battery, is badly in need of the new aluminum-plastic composite membrane solved the problem.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of lithium ion battery flexible package aluminum-plastic composite membrane solved the problem.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of lithium ion battery flexible package aluminum-plastic composite membrane, comprise the separator, plastic-aluminum layer and the adhesive layer that set gradually, between separator and plastic-aluminum layer, be provided with polyvinylidene fluoride layer, polyvinylidene fluoride layer adheres to the surface of aluminium foil layer; Protective layer is provided with between plastic-aluminum layer and adhesive layer; Described protective layer is dual-protection structure, is the combination layer of any two-layer formation adopted in metallic chromium layer, thermoset plastic layer, polyvinylidene fluoride layer.
Protective layer is the combination layer that metallic chromium layer and thermoset plastic layer are formed, and now metallic chromium layer is near plastic-aluminum layer, and thermoset plastic layer is near adhesive layer.
Protective layer is the combination layer that thermoset plastic layer and polyvinylidene fluoride layer are formed, and now thermoset plastic layer is near plastic-aluminum layer, and polyvinylidene fluoride layer is near adhesive layer.
Protective layer is the combination layer that metallic chromium layer and polyvinylidene fluoride layer are formed, and now metallic chromium layer is near plastic-aluminum layer, and polyvinylidene fluoride layer is near adhesive layer.
The thickness of protective layer is between 1 ~ 10 micron.
The thickness of protective layer is between 3 ~ 6 microns.
The thickness of polyvinylidene fluoride layer is between 2 ~ 10 microns.
The thickness of separator is between 20 ~ 30 microns, and the thickness of aluminium foil layer is between 30 ~ 90 microns, and the thickness of adhesive layer is between 30 ~ 50 microns.
The utility model has the advantages that:
The utility model is provided with protective layer between the adhesive layer and aluminium foil layer of aluminum-plastic composite membrane.The applicant is through studying for a long period of time; determine to adopt two kinds of combination layers in metallic chromium layer, thermoset plastic layer and polyvinylidene fluoride layer as protective layer material; the characteristic making full use of different materials cooperatively interacts; thus can effectively avoid the corrosive liquids of battery to be infiltrated and corrosive aluminum foil layer by adhesive layer; guarantee that adhesive layer does not come off; battery no leakage; improve the useful life of packaging film; and can ensure that the electrolyte of battery is not by the pollution of aluminum-plastic composite membrane material composition, ensures the stable performance of battery.
Accompanying drawing explanation
Fig. 1 is the structural representation of aluminum-plastic composite membrane in prior art,
Fig. 2 is the structural representation of a kind of lithium ion battery flexible package of the utility model aluminum-plastic composite membrane.
In figure: separator 1, plastic-aluminum layer 2, adhesive layer 3, protective layer 4, polyvinylidene fluoride layer 5.
Embodiment
Refer to Fig. 2, Fig. 2 is the structural representation of a kind of lithium ion battery flexible package aluminum-plastic composite membrane that the utility model execution mode provides, the aluminum-plastic composite membrane that the utility model embodiment provides, comprises the separator 1, plastic-aluminum layer 2 and the adhesive layer 3 that set gradually.Designing points of the present utility model is, is provided with protective layer 4 between plastic-aluminum layer 2 and adhesive layer 3; Polyvinylidene fluoride layer 5 is provided with between separator 1 and plastic-aluminum layer 2.
Described protective layer 4 is dual-protection structure, adopts the combination layer of any two-layer formation in metallic chromium layer, thermoset plastic layer, polyvinylidene fluoride layer.Such as, protective layer 4 can be the combination layer that metallic chromium layer and thermoset plastic layer are formed, and now metallic chromium layer is near plastic-aluminum layer 2, and thermoset plastic layer is near adhesive layer 3.Or protective layer 4 can be the combination layer that thermoset plastic layer and polyvinylidene fluoride layer are formed, now thermoset plastic layer is near plastic-aluminum layer 2, and polyvinylidene fluoride layer is near adhesive layer 3.Or protective layer 4 can be the combination layer that metallic chromium layer and polyvinylidene fluoride layer are formed, now metallic chromium layer is near plastic-aluminum layer 2, and polyvinylidene fluoride layer is near adhesive layer 3.In actual applications, different combinations can be selected according to the different purposes of lithium battery with needing.Described thermoset plastic layer is heat curing-type polyolefin acid or heat curing-type polyacrylic acid.
Described polyvinylidene fluoride layer 5 adheres to the surface of aluminium foil layer 2, can strengthen intensity and the hardness of aluminium foil, makes aluminium foil not easily by HF acid corrosion.The thickness of polyvinylidene fluoride layer 5 is between 2 ~ 10 microns.
The material of separator 1 adopts nylon as embodiment, and thickness is between 20 ~ 30 microns.
Plastic-aluminum layer 2 thickness is between 30 ~ 90 microns.
The material of adhesive layer 3 adopts polypropylene as embodiment, and thickness is between 30 ~ 50 microns.
The THICKNESS CONTROL of protective layer 4 is between 1 ~ 10 micron.Preferably, the THICKNESS CONTROL of protective layer 4 is between 3 ~ 6 microns.
Wherein, thermoset plastic layer is heat curing-type polyene acid layer, such as heat curing-type polypropylene acid layer, heat curing-type polybutene acid layer and composition thereof etc.Wherein, heat curing-type polypropylene acid layer is preferably.
In the utility model embodiment, when protective layer comprises metallic chromium layer, metallic chromium layer leans on the method for chemical deposition or spray to deposit to aluminium foil layer surface, is combined as a whole with aluminium foil layer.
The thickness controlling metallic chromium layer in the utility model is nanoscale or quasi-nano; thus thin, the fine and close performance requirement of protective layer can be reached; even if thus make in the present embodiment have the packaging film of crome metal protective layer also can well protect after the stretch aluminium foil layer surface; and crome metal is as a kind of inert metal, it can not affect manufacturing process and the performance thereof of battery.
In the utility model embodiment when protective layer 4 comprises thermoset plastic layer; can by roller coating or painting way by thermoset plastic as heat curing-type polyolefin acid solution is coated in aluminium foil layer surface; and adopt quick high-temp curing technology, by it curing cross-linked on aluminium foil layer, using as protective layer.Or by the mode of roller coating or brushing, this solution is coated in oneself crome metal surface of adhering in a manner described in advance of aluminium foil surface, curing cross-linked plays auxiliary protection and strengthens the connection function with adhesive layer on metallic chromium layer.Relative to common thermosetting, curing of the present utility model, can make thermoset plastic layer after thermosetting, have certain plasticity, elongation 5% ~ 50%, can resistance to cold stamping.
Polyvinylidene fluoride layer 5 is by being attached to metallic chromium layer or the heat curing-type polyene acid layer of protective layer 5 as under type: in advance crome metal or heat curing-type polyolefin acid are attached to as stated above plastic-aluminum layer 2 surface; choose Kynoar latex; adopt roller coat or painting way; above the metallic chromium layer being coated in above-mentioned plastic-aluminum layer 2 surface attachment or heat curing-type polyene acid layer; and by it solidification; thus forming Kynoar thin layer on its surface, it is 2 ~ 8g/m that coated weight controls
2, and closely careful at plastic-aluminum layer 2 surface cure, thus play the effect of Additional protective layers.Because of its character, good connection and fusion can be had with adhesive layer 3 again.
The aluminum-plastic composite membrane that the utility model provides, can pass through cold-punching molding or the coated battery of straight forming.Wherein, cold-punching molding refers to after prepared by packaging film, by the mode of punching press, packaging film is struck out given shape for carrying battery.Such as pit shape.And straight forming refers to and battery is directly placed on packaging film, by packaging film by cell core.
The aluminum-plastic composite membrane that the utility model provides, may be used for packing compact power, also may be used for packing electrical source of power, as lithium batteries such as electric automobile, electric motor car, electric tools.
The foregoing is only execution mode of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all included in scope of patent protection of the present utility model with lithium.
Claims (8)
1. a lithium ion battery flexible package aluminum-plastic composite membrane, comprise the separator (1), plastic-aluminum layer (2) and the adhesive layer (3) that set gradually, it is characterized in that: between separator (1) and plastic-aluminum layer (2), be provided with polyvinylidene fluoride layer (5), polyvinylidene fluoride layer (5) adheres to the surface of aluminium foil layer (2); Protective layer (4) is provided with between plastic-aluminum layer (2) and adhesive layer (3); Described protective layer (4) is dual-protection structure, is the combination layer of any two-layer formation adopted in metallic chromium layer, thermoset plastic layer, polyvinylidene fluoride layer.
2. aluminum-plastic composite membrane according to claim 1; it is characterized in that: protective layer (4) is the combination layer that metallic chromium layer and thermoset plastic layer are formed; now metallic chromium layer is near plastic-aluminum layer (2), and thermoset plastic layer is near adhesive layer (3).
3. aluminum-plastic composite membrane according to claim 1; it is characterized in that: protective layer (4) is the combination layer that thermoset plastic layer and polyvinylidene fluoride layer are formed; now thermoset plastic layer is near plastic-aluminum layer (2), and polyvinylidene fluoride layer is near adhesive layer (3).
4. aluminum-plastic composite membrane according to claim 1; it is characterized in that: protective layer (4) is the combination layer that metallic chromium layer and polyvinylidene fluoride layer are formed; now metallic chromium layer is near plastic-aluminum layer (2), and polyvinylidene fluoride layer is near adhesive layer (3).
5. the aluminum-plastic composite membrane according to claim 1,2,3 or 4, is characterized in that: the thickness of protective layer (4) is between 1 ~ 10 micron.
6. the aluminum-plastic composite membrane according to claim 1,2,3 or 4, is characterized in that: the thickness of protective layer (4) is between 3 ~ 6 microns.
7. aluminum-plastic composite membrane according to claim 1, is characterized in that: the thickness of polyvinylidene fluoride layer (5) is between 2 ~ 10 microns.
8. aluminum-plastic composite membrane according to claim 1, it is characterized in that: the thickness of separator (1) is between 20 ~ 30 microns, the thickness of aluminium foil layer (2) is between 30 ~ 90 microns, and the thickness of adhesive layer (3) is between 30 ~ 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520749060.3U CN204991819U (en) | 2015-09-28 | 2015-09-28 | Lithium ion battery is plastic -aluminum complex film for soft -packing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520749060.3U CN204991819U (en) | 2015-09-28 | 2015-09-28 | Lithium ion battery is plastic -aluminum complex film for soft -packing |
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| CN204991819U true CN204991819U (en) | 2016-01-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585899A (en) * | 2018-11-30 | 2019-04-05 | 曙鹏科技（深圳）有限公司 | A kind of battery processing method and battery |
| CN111361254A (en) * | 2020-03-31 | 2020-07-03 | 常州斯威克光伏新材料有限公司 | Battery flexible packaging film safe to use |
| CN111361250A (en) * | 2020-04-13 | 2020-07-03 | 常州斯威克光伏新材料有限公司 | Double-sided heat-sealing flexible packaging film for lithium battery |
| CN111430587A (en) * | 2020-05-01 | 2020-07-17 | 常州斯威克光伏新材料有限公司 | Graphene flexible packaging film for lithium ion battery |
-
2015
- 2015-09-28 CN CN201520749060.3U patent/CN204991819U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109585899A (en) * | 2018-11-30 | 2019-04-05 | 曙鹏科技（深圳）有限公司 | A kind of battery processing method and battery |
| CN111361254A (en) * | 2020-03-31 | 2020-07-03 | 常州斯威克光伏新材料有限公司 | Battery flexible packaging film safe to use |
| CN111361250A (en) * | 2020-04-13 | 2020-07-03 | 常州斯威克光伏新材料有限公司 | Double-sided heat-sealing flexible packaging film for lithium battery |
| CN111430587A (en) * | 2020-05-01 | 2020-07-17 | 常州斯威克光伏新材料有限公司 | Graphene flexible packaging film for lithium ion battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 406, 4th floor, Rainbow Technology Building, 36 Gaoxin North 6th Road, songpingshan community, Xili street, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Guanglin caiyao new energy material technology Co.,Ltd. Address before: 518067 13a, block C, Shekou Youran house, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BTREE INDUSTRIAL Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 516000 Dushi village, Pingtan Town, Huiyang District, Huizhou City, Guangdong Province (No. 99 Airport Road) (plant I in the plant area of Guangdong Biaoding Technology Co., Ltd.) Patentee after: Guangdong Guanglin caiyao new energy materials Co.,Ltd. Address before: 406, 4th floor, Rainbow Technology Building, 36 Gaoxin North 6th Road, songpingshan community, Xili street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen Guanglin caiyao new energy material technology Co.,Ltd. |
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| CP03 | Change of name, title or address |