CN114619725A - Black shading type lithium ion battery composite packaging aluminum-plastic film - Google Patents

Black shading type lithium ion battery composite packaging aluminum-plastic film Download PDF

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Publication number
CN114619725A
CN114619725A CN202210252972.4A CN202210252972A CN114619725A CN 114619725 A CN114619725 A CN 114619725A CN 202210252972 A CN202210252972 A CN 202210252972A CN 114619725 A CN114619725 A CN 114619725A
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CN
China
Prior art keywords
layer
aluminum
black
plastic film
lithium ion
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Pending
Application number
CN202210252972.4A
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Chinese (zh)
Inventor
夏文进
章结兵
石亚丽
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Zhejiang Lidun New Energy Materials Co ltd
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Zhejiang Lidun New Energy Materials Co ltd
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Priority to CN202210252972.4A priority Critical patent/CN114619725A/en
Publication of CN114619725A publication Critical patent/CN114619725A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • H01M50/141—Primary casings; Jackets or wrappings for protecting against damage caused by external factors for protecting against humidity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form
    • B65D2565/387—Materials used as gas barriers

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention relates to a black shading type lithium ion battery composite packaging aluminum-plastic film. The aluminum plastic film comprises a propylene copolymer layer CPP, an adhesive layer, an aluminum foil layer AL, an adhesive layer, a polyethylene glycol terephthalate black PET layer, an adhesive layer and a nylon layer PA, and the propylene copolymer layer CPP, the adhesive layer, the aluminum foil layer AL, the adhesive layer, the polyethylene glycol terephthalate black PET layer, the adhesive layer and the nylon layer PA are sequentially arranged from inside to outside. The black PET layer is used for compounding, and compared with the traditional aluminum-plastic film, the black PET film has better light shielding performance, heat dissipation performance, insulating performance and chemical stability, and the service life of the aluminum-plastic film is prolonged.

Description

Black shading type lithium ion battery composite packaging aluminum-plastic film
Technical Field
The invention relates to the field of battery packaging materials, in particular to a black shading type lithium ion battery composite packaging aluminum-plastic film.
Background
In recent years, with the increase of lithium battery technology and yield, the demand of lithium battery packaging materials is increasing, the packaging materials of lithium batteries have started to adopt aluminum-plastic films to replace traditional steel shells, and the aluminum-plastic film packaging materials have become the mainstream of the application development of the future lithium battery packaging materials.
The traditional aluminum-plastic film is basically composed of an outer protective layer, a middle aluminum foil barrier layer and an inner heat sealing layer, the layers are bonded by an adhesive, the outer protective layer is generally compounded by nylon, and polyethylene terephthalate (PET) is selected for reinforced compounding at present, so that the barrier property and the friction resistance of the composite material are improved. However, in the use process of the battery, the light-shielding property and the heat dissipation property of the traditional composite film are not good, which may lead to the possibility of premature aging of the material and degradation of adhesive curing molecules in the long-term use process of the aluminum plastic film, and further improvement is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a black shading type lithium ion battery composite packaging aluminum-plastic film which has excellent shading performance, heat dissipation performance, barrier performance and chemical stability.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a black shading type lithium ion battery composite packaging plastic-aluminum membrane, is by interior to exterior in proper order: the adhesive comprises a copolymer propylene layer CPP, a first adhesive layer, an aluminum foil layer AL, a second adhesive layer, a polyethylene glycol terephthalate black PET layer, a third adhesive layer and a nylon layer PA.
Preferably, the surface of the aluminum foil layer AL is passivated in a chromizing mode, and the thickness of the aluminum foil layer AL is 20-60 mu m.
Preferably, the layer of co-polypropylene CPP has a thickness of 10 to 80 μm and the lamination surface is corona treated before lamination.
Preferably, the thickness of the polyethylene terephthalate black PET layer is 10-50 μm, and the polyethylene terephthalate black PET layer is subjected to corona treatment on both sides before compounding. Preferably, the polyethylene terephthalate black PET layer material is prepared by carrying out melt blending extrusion and film blowing processes on PET and carbon black.
Preferably, the thickness of the nylon layer PA is 10-50 μm, and the surface of the nylon layer PA, which is in contact with the polyethylene terephthalate black PET layer, is subjected to corona treatment.
After the technical scheme is adopted, the invention has the beneficial effects that:
firstly, the black PET adopted in the aluminum-plastic film can improve the shading performance and the heat dissipation performance of the aluminum-plastic film, reduce the light absorption strength of the inner layer material and the adhesive layer curing molecules and improve the ageing resistance of the material and the curing molecules; and secondly, the protective layer of the aluminum-plastic film adopts black PET and nylon for double-layer protection, so that water vapor can be blocked more effectively and the chemical stability of the material can be improved.
Drawings
FIG. 1 is a schematic diagram of a black shading type lithium ion battery composite packaging aluminum-plastic film structure of the present invention
1. The polypropylene composite material comprises a polypropylene copolymer layer CPP, 2 parts of a first adhesive layer, 3 parts of an aluminum foil layer AL, 4 parts of a second adhesive layer, 5 parts of a polyethylene terephthalate black PET layer, 6 parts of a third adhesive layer and 7 parts of a nylon layer PA.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
As shown in fig. 1, the invention provides a black shading type lithium ion battery composite packaging aluminum plastic film, which comprises a copolymer propylene layer CPP (1), a first adhesive layer (2), an aluminum foil layer AL (3), a second adhesive layer (4), a polyethylene terephthalate black PET layer (5), a third adhesive layer (6) and a nylon layer PA (7).
The barrier layer is an aluminum foil layer, the surface of the aluminum foil layer AL is passivated in a chromizing mode, the chromizing can improve the bonding force between the barrier layer and other resins, the thickness of the aluminum foil layer AL is 20-60 mu m, the thickness of the aluminum foil layer AL is 30-40 mu m in the embodiment, the complete separation of water vapor can be guaranteed by selecting the thickness of the aluminum foil layer AL to be 30-40 mu m, and the manufacturing cost of the aluminum-plastic film can be effectively reduced.
The heat sealing layer is a copolymerized propylene layer, the thickness of the copolymerized propylene layer CPP is 10-80 μm, preferably 15-55 μm in the embodiment, and the heat sealing layer is subjected to corona treatment with the aluminum foil composite surface.
The layer thickness of the polyethylene terephthalate black PET is 10-50 μm, preferably 20-30 μm in this example, and is subjected to double-sided corona treatment.
The thickness of the nylon layer PA is 10-50 μm, the thickness of the nylon layer in the embodiment is preferably 15-35 μm, and the composite surface of the nylon layer PA and the black PET is subjected to corona treatment.
The manufacturing process of the aluminum-plastic film comprises the following steps:
1. carrying out plasma corona treatment on a CPP composite surface of the copolymerized propylene layer, a PA composite surface of the nylon layer and two surfaces of the polyethylene glycol terephthalate black PET;
2. carrying out double-sided roller coating on an aluminum foil layer AL foil with an adhesive, sequentially compounding a co-polypropylene layer CPP and polyethylene glycol terephthalate black PET on the double sides of the aluminum foil layer AL foil, and drying;
3. and (3) performing roller coating on the PET surface of the CPP/aluminum foil layer AL/polyethylene glycol terephthalate black PET of the copolymerized propylene layer, compounding the PET surface with the PA of the nylon layer, and drying.
The product of the invention achieves the following indexes through determination:
1. and (3) testing the peel strength: soaking the electrolyte at 85 ℃ for 7 days, wherein the interlayer peeling strength of AL/CPP and AL/black PET/PA is more than or equal to 8N/15 mm;
2. and (3) testing the permeability resistance: after soaking in water at 60 deg.c for 14 days, no demixing occurs and the weight change is less than 0.05 g.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (6)

1. The utility model provides a black type lithium ion battery composite packaging plastic-aluminum membrane that shades, its characterized in that, the plastic-aluminum membrane includes copolymerization propylene layer CPP, first adhesive layer, aluminium foil layer AL, second adhesive layer, polyethylene glycol terephthalate black PET layer, third adhesive layer, nylon layer PA, and it is by interior to being outside in proper order: the adhesive comprises a copolymer propylene layer CPP (1), a first adhesive layer (2), an aluminum foil layer AL (3), a second adhesive layer (4), a polyethylene terephthalate black PET layer (5), a third adhesive layer (6) and a nylon layer PA (7).
2. The black shading type lithium ion battery composite packaging aluminum-plastic film as claimed in claim 1, wherein the surface of the aluminum foil layer AL is passivated by chromizing, and the thickness of the aluminum foil layer AL is 20-60 μm.
3. The black shading type lithium ion battery composite packaging aluminum plastic film as claimed in claim 1, wherein the thickness of the co-polypropylene layer CPP is 10-80 μm, and the composite surface is subjected to corona treatment before the compounding.
4. The black shading type lithium ion battery composite packaging aluminum plastic film as claimed in claim 1, wherein the thickness of the polyethylene terephthalate black PET layer is 10-50 μm, and the two sides of the polyethylene terephthalate black PET layer are subjected to corona treatment before the compounding.
5. The black shading type lithium ion battery composite packaging aluminum plastic film as claimed in claim 4, wherein the polyethylene terephthalate black PET layer material is prepared by melt blending, extrusion and film blowing processes of PET and carbon black.
6. The black shading type lithium ion battery composite packaging aluminum plastic film as claimed in claim 1, wherein the thickness of the nylon layer PA is 10-50 μm, and the surface of the nylon layer PA, which is in contact with the polyethylene terephthalate black PET layer, is subjected to corona treatment.
CN202210252972.4A 2022-03-15 2022-03-15 Black shading type lithium ion battery composite packaging aluminum-plastic film Pending CN114619725A (en)

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CN202210252972.4A CN114619725A (en) 2022-03-15 2022-03-15 Black shading type lithium ion battery composite packaging aluminum-plastic film

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CN202210252972.4A CN114619725A (en) 2022-03-15 2022-03-15 Black shading type lithium ion battery composite packaging aluminum-plastic film

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1660937A (en) * 2004-02-24 2005-08-31 中国乐凯胶片集团公司 Black lighttight type polyester film and preparation method
JP2011119651A (en) * 2009-11-04 2011-06-16 Mitsubishi Plastics Inc Biaxially-oriented polyester film for sealing back of solar cell
CN204558551U (en) * 2015-02-06 2015-08-12 江阴骏驰光电科技有限公司 A kind of lithium battery flexible packaging aluminum plastic film
CN205202378U (en) * 2015-10-10 2016-05-04 东莞市卓越新材料科技有限公司 Mute honorable look plastic -aluminum membrane
CN110041672A (en) * 2019-04-28 2019-07-23 杭州大华塑业有限公司 A kind of fire retardant mylar and preparation method thereof
CN210200765U (en) * 2019-06-18 2020-03-27 浙江华正能源材料有限公司 Colored aluminum plastic film
CN111761909A (en) * 2020-05-27 2020-10-13 浙江华正能源材料有限公司 Outer-layer film material for aluminum-plastic film, black flame-retardant aluminum-plastic film and application of black flame-retardant aluminum-plastic film
CN211710243U (en) * 2019-12-30 2020-10-20 江西明冠锂膜技术有限公司 Corrosion-resistant black matte aluminum-plastic film for digital lithium battery
CN113858738A (en) * 2021-10-22 2021-12-31 浙江锂盾新能源材料有限公司 Temperature-sensitive color-changing aluminum-plastic film for battery

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1660937A (en) * 2004-02-24 2005-08-31 中国乐凯胶片集团公司 Black lighttight type polyester film and preparation method
JP2011119651A (en) * 2009-11-04 2011-06-16 Mitsubishi Plastics Inc Biaxially-oriented polyester film for sealing back of solar cell
CN204558551U (en) * 2015-02-06 2015-08-12 江阴骏驰光电科技有限公司 A kind of lithium battery flexible packaging aluminum plastic film
CN205202378U (en) * 2015-10-10 2016-05-04 东莞市卓越新材料科技有限公司 Mute honorable look plastic -aluminum membrane
CN110041672A (en) * 2019-04-28 2019-07-23 杭州大华塑业有限公司 A kind of fire retardant mylar and preparation method thereof
CN210200765U (en) * 2019-06-18 2020-03-27 浙江华正能源材料有限公司 Colored aluminum plastic film
CN211710243U (en) * 2019-12-30 2020-10-20 江西明冠锂膜技术有限公司 Corrosion-resistant black matte aluminum-plastic film for digital lithium battery
CN111761909A (en) * 2020-05-27 2020-10-13 浙江华正能源材料有限公司 Outer-layer film material for aluminum-plastic film, black flame-retardant aluminum-plastic film and application of black flame-retardant aluminum-plastic film
CN113858738A (en) * 2021-10-22 2021-12-31 浙江锂盾新能源材料有限公司 Temperature-sensitive color-changing aluminum-plastic film for battery

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