CN111341950A - Packaging film of polymer lithium ion battery - Google Patents
Packaging film of polymer lithium ion battery Download PDFInfo
- Publication number
- CN111341950A CN111341950A CN202010243424.6A CN202010243424A CN111341950A CN 111341950 A CN111341950 A CN 111341950A CN 202010243424 A CN202010243424 A CN 202010243424A CN 111341950 A CN111341950 A CN 111341950A
- Authority
- CN
- China
- Prior art keywords
- layer
- polyvinyl chloride
- chloride resin
- packaging film
- lithium ion
- 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.)
- Pending
Links
- 239000012785 packaging film Substances 0.000 title claims abstract description 38
- 229920006280 packaging film Polymers 0.000 title claims abstract description 38
- 229920000642 polymer Polymers 0.000 title claims abstract description 29
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 24
- 239000010410 layer Substances 0.000 claims abstract description 186
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 60
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 60
- 229920005989 resin Polymers 0.000 claims abstract description 60
- 239000011347 resin Substances 0.000 claims abstract description 60
- -1 polypropylene Polymers 0.000 claims abstract description 35
- 239000004743 Polypropylene Substances 0.000 claims abstract description 31
- 229920001155 polypropylene Polymers 0.000 claims abstract description 31
- 239000011241 protective layer Substances 0.000 claims abstract description 31
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000009459 flexible packaging Methods 0.000 claims abstract description 19
- 239000011888 foil Substances 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 9
- 238000005260 corrosion Methods 0.000 claims abstract description 9
- 239000004431 polycarbonate resin Substances 0.000 claims abstract description 9
- 229920005668 polycarbonate resin Polymers 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims description 24
- 239000003365 glass fiber Substances 0.000 claims description 23
- 239000012790 adhesive layer Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims 2
- 239000002390 adhesive tape Substances 0.000 claims 1
- 239000010408 film Substances 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 10
- 239000003513 alkali Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000010292 electrical insulation Methods 0.000 abstract description 4
- 230000001590 oxidative effect Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 4
- 150000007513 acids Chemical class 0.000 abstract description 2
- 239000005030 aluminium foil Substances 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 12
- 238000004026 adhesive bonding Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920006342 thermoplastic vulcanizate Polymers 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of battery packaging films, in particular to a flexible packaging film of a polymer lithium ion battery, which comprises a composite protective layer, a first bonding layer, an aluminum foil layer, a polyvinyl chloride resin layer, a second bonding layer and a heat sealing layer which are sequentially stacked, wherein the composite protective layer comprises a TPX film layer and a polypropylene layer, the TPX film layer and the polypropylene layer are connected through an adhesive, a plurality of grooves and corrosion-resistant layers are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the heat sealing layer is made of polycarbonate resin, and the thickness of the heat sealing layer is 20-30 mu m; PX has high temperature resistance, and polypropylene has higher strength and rigidity, especially has outstanding bending fatigue resistance, and because it is nonpolar high polymer, has excellent electrical insulation, more excellent heat resistance, hardly absorbs water, and other acids are basically stable except strong oxidizing acid, and alkali resistance is more outstanding, the PX uses the two as a protective layer, thereby improving the protective performance and the service performance of the battery packaging film.
Description
Technical Field
The invention relates to the technical field of battery packaging films, in particular to a flexible packaging film of a polymer lithium ion battery.
Background
At present, the price of the polymer in the market is generally higher than that of the liquid lithium battery, but because the competitive mode of the mobile electric appliance is changing silently, especially the design value innovation (such as a superior performance and a large-size battery with the thickness of less than 4 mm) brought by the polymer battery to the mobile electric appliance is recognized by more and more designers of mobile phones, mobile DVDs and the like.
The packaging material and the structure of the soft package battery enable the soft package battery to have a series of advantages, for example, the safety performance is good, the soft package battery is packaged by an aluminum plastic film structurally, and when safety problems occur, the soft package battery generally can be blown and cracked, and explosion is not caused like a steel shell or an aluminum shell battery cell; the existing packaging film is generally used for the traditional lithium ion battery and comprises a nylon layer, a metal aluminum foil layer and a heat sealing layer, the barrier property, the heat sealing property and the ductility of the packaging film of the polymer lithium ion battery are higher, and the traditional packaging film cannot meet the packaging requirement of the polymer lithium ion battery.
Disclosure of Invention
The purpose of the invention is: overcomes the defects in the prior art, and provides a flexible packaging film of a polymer lithium ion battery, which has strong water vapor barrier property, stable heat sealing property and higher ductility.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a flexible packaging film of a polymer lithium ion battery comprises a composite protective layer, a first adhesive layer, an aluminum foil layer, a polyvinyl chloride resin layer, a second adhesive layer and a heat sealing layer which are sequentially stacked, wherein the composite protective layer comprises a TPX thin layer and a polypropylene layer, the TPX thin layer and the polypropylene layer are connected through an adhesive, a plurality of grooves and corrosion-resistant layers are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the heat sealing layer is made of polycarbonate resin, and the thickness of the heat sealing layer is 20-30 mu m.
Furthermore, the polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, and the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer.
Furthermore, the addition amount of the glass fiber in the glass fiber modified polyvinyl chloride resin layer is 1-5% of the mass of the polyvinyl chloride resin layer.
Further, the thickness of the aluminum foil layer is 60-80 μm.
Further, the thickness of the composite protective layer is 20-40 μm.
Further, the heat sealing layer is filled with a modified filler, and the modified filler is one of modified graphene or modified montmorillonite.
Further, the addition amount of the modified filler is 1-3% of the mass of the heat seal layer.
Further, the groove is in a conical shape or a regular pyramid shape, and the depth of the groove is 100nm and 300 nm.
Furthermore, a plurality of anti-skid grains are respectively arranged on the contact surface between the TPX film layer and the polypropylene layer.
The technical scheme adopted by the invention has the beneficial effects that:
PX has high temperature resistance, the intensity and the rigidity of polypropylene are higher, especially have outstanding bending fatigue resistance, because it is nonpolar high polymer, have good electrical insulation, more have good heat resistance, hardly absorb water, except strong oxidizing acid, other acid is basically very stable, alkali resistance is more outstanding, so use both compositely as the protective layer, the protective property and the performance of battery packaging film have been improved, the upper surface and the lower surface of aluminium foil layer set up the recess respectively, show the joint strength who has improved between aluminium foil layer and the adjacent layer structure, thereby improved the resistant peel strength between each layer in the packaging film, after the packaging film is used for a long time, can not take place to peel off between each layer.
The strength and rigidity of the enhanced polyvinyl chloride resin layer are multiplied, the acid and alkali resistance is excellent, and by adopting the structure, the overall strength and the service performance of the packaging film are further improved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
A flexible packaging film of a polymer lithium ion battery comprises a composite protective layer, a first adhesive layer, an aluminum foil layer, a polyvinyl chloride resin layer, a second adhesive layer and a heat sealing layer which are sequentially stacked, wherein the composite protective layer comprises a TPX thin layer and a polypropylene layer, the TPX thin layer and the polypropylene layer are connected through an adhesive, a plurality of grooves and corrosion-resistant layers are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the heat sealing layer is made of polycarbonate resin, and the thickness of the heat sealing layer is 20-30 mu m. TPX has high temperature resistance, the intensity and the rigidity of polypropylene are higher, especially, the TPX has outstanding bending fatigue resistance, because the TPX is a nonpolar high polymer, the TPX has excellent electrical insulation, more excellent heat resistance and almost no water absorption, except strong oxidizing acid, other acids are basically stable, and the alkali resistance is more outstanding, so the TPX and the TPX are used as a protective layer in a composite way, the protective performance and the service performance of the battery packaging film are improved, grooves are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the connection strength between the aluminum foil layer and an adjacent layer structure is obviously improved, the peeling resistance strength between layers in the packaging film is improved, and after the packaging film is used for a long time, the peeling between the layers cannot occur.
As a preferred embodiment, in this embodiment, the polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, the strength and rigidity of the reinforced polyvinyl chloride resin layer are multiplied, and the acid-base resistance is excellent.
In a preferred embodiment, the amount of the glass fiber added to the glass fiber-modified polyvinyl chloride resin layer in the present embodiment is 1 to 5% by mass of the polyvinyl chloride resin layer.
As a preferred embodiment, the thickness of the aluminum foil layer in this embodiment is 60 to 80 μm.
As a preferred embodiment, the thickness of the composite protective layer in this embodiment is 20-40 μm.
As a preferred embodiment, in this embodiment, the heat sealing layer is further filled with a modified filler, and the modified filler is one of modified graphene or modified montmorillonite.
As a preferred embodiment, the modified filler is added in an amount of 1 to 3% by mass based on the mass of the heat-seal layer in this example.
As a preferred embodiment, the groove in this embodiment has a conical or regular pyramid shape, and the depth of the groove is 100nm and 300 nm.
As a preferred embodiment, in the embodiment, the contact surface between the TPX film layer and the polypropylene layer is respectively provided with a plurality of anti-slip lines, and the structural design of the anti-slip lines improves the bonding strength and stability between the TPX film layer and the polypropylene layer, and improves the comprehensive performance of the protective layer.
Example 1
The utility model provides a polymer lithium ion battery's flexible packaging film, is including the compound protective layer, first bond line, aluminium foil layer, polyvinyl chloride resin layer, second bond line and the heat-seal layer that stack gradually the setting, compound protective layer includes TPX thin layer and polypropylene layer, connects through the gluing agent between TPX thin layer and the polypropylene layer, is equipped with a plurality of anti-skidding lines on the contact surface between TPX thin layer and the polypropylene layer respectively, be equipped with a plurality of recesses and corrosion resistant layer on two upper and lower surfaces of aluminium foil layer respectively, the recess becomes the taper shape, the degree of depth of recess is 100nm, the heat-seal layer adopts polycarbonate resin, the thickness of heat-seal layer is 20 mu m, and the thickness of aluminium foil layer is 60 mu m, and the thickness of compound protective layer is 20 mu m.
The polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, and the addition amount of glass fibers in the glass fiber modified polyvinyl chloride resin layer is 1% of the mass of the polyvinyl chloride resin layer.
The heat sealing layer is further filled with modified filler, the modified filler is modified graphene, and the addition amount of the modified filler is 1% of the mass of the heat sealing layer.
Example 2
The utility model provides a polymer lithium ion battery's flexible packaging film, is including the compound protective layer, first bond line, aluminium foil layer, polyvinyl chloride resin layer, second bond line and the heat-seal layer that stack gradually the setting, compound protective layer includes TPX thin layer and polypropylene layer, connects through the gluing agent between TPX thin layer and the polypropylene layer, is equipped with a plurality of anti-skidding lines on the contact surface between TPX thin layer and the polypropylene layer respectively, be equipped with a plurality of recesses and corrosion resistant layer on two upper and lower surfaces of aluminium foil layer respectively, the recess becomes the taper shape, the degree of depth of recess is 150nm, the heat-seal layer adopts polycarbonate resin, the thickness of heat-seal layer is 22 mu m, and the thickness of aluminium foil layer is 65 mu m, and the thickness of compound protective layer is 25 mu m.
The polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, and the addition amount of glass fibers in the glass fiber modified polyvinyl chloride resin layer is 2% of the mass of the polyvinyl chloride resin layer.
The heat sealing layer is further filled with modified filler, the modified filler is one of modified graphene or modified montmorillonite, and the addition amount of the modified filler is 1.5% of the mass of the heat sealing layer.
Example 3
The utility model provides a polymer lithium ion battery's flexible packaging film, is including the compound protective layer, first bond line, aluminium foil layer, polyvinyl chloride resin layer, second bond line and the heat-seal layer that stack gradually the setting, compound protective layer includes TPX thin layer and polypropylene layer, connects through the gluing agent between TPX thin layer and the polypropylene layer, is equipped with a plurality of anti-skidding lines on the contact surface between TPX thin layer and the polypropylene layer respectively, be equipped with a plurality of recesses and corrosion resistant layer on two upper and lower surfaces of aluminium foil layer respectively, the recess becomes the taper shape, the degree of depth of recess is 200nm, the heat-seal layer adopts polycarbonate resin, the thickness of heat-seal layer is 25 mu m, and the thickness of aluminium foil layer is 70 mu m, and the thickness of compound protective layer is 30 mu m.
The polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, and the addition amount of glass fibers in the glass fiber modified polyvinyl chloride resin layer is 3% of the mass of the polyvinyl chloride resin layer.
The heat sealing layer is further filled with modified filler, the modified filler is modified graphene, and the addition amount of the modified filler is 2% of the mass of the heat sealing layer.
Example 4
The flexible packaging film of the polymer lithium ion battery comprises a composite protective layer, a first adhesive layer, an aluminum foil layer, a polyvinyl chloride resin layer, a second adhesive layer and a heat sealing layer which are sequentially stacked, wherein the composite protective layer comprises a TPX (thermoplastic vulcanizate) film layer and a polypropylene layer, the TPX film layer and the polypropylene layer are connected through an adhesive, a plurality of anti-skid grains are respectively arranged on a contact surface between the TPX film layer and the polypropylene layer, a plurality of grooves and corrosion-resistant layers are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the grooves are in a regular pyramid shape, the depth of the grooves is 250nm, the heat sealing layer is made of polycarbonate resin, the thickness of the heat sealing layer is 25 mu m, the thickness of the aluminum foil layer is 70 mu m, and the thickness of the composite protective layer is.
The polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, and the addition amount of glass fibers in the glass fiber modified polyvinyl chloride resin layer is 4% of the mass of the polyvinyl chloride resin layer.
Wherein, the heat sealing layer is also filled with modified filler, the modified filler adopts modified montmorillonite, and the addition amount of the modified filler is 2.5 percent of the mass of the heat sealing layer.
Example 5
The utility model provides a polymer lithium ion battery's flexible packaging film, is including the compound protective layer, first bond line, aluminium foil layer, polyvinyl chloride resin layer, second bond line and the heat-seal layer that stack gradually the setting, compound protective layer includes TPX thin layer and polypropylene layer, connects through the gluing agent between TPX thin layer and the polypropylene layer, is equipped with a plurality of anti-skidding lines on the contact surface between TPX thin layer and the polypropylene layer respectively, be equipped with a plurality of recesses and corrosion resistant layer on two upper and lower surfaces of aluminium foil layer respectively, the recess becomes regular pyramid, the degree of depth of recess is 300nm, the heat-seal layer adopts polycarbonate resin, the thickness of heat-seal layer is 30 mu m, and the thickness of aluminium foil layer is 80 mu m, and the thickness of compound protective layer is 40 mu m.
The polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer, and the addition amount of glass fibers in the glass fiber modified polyvinyl chloride resin layer is 5% of the mass of the polyvinyl chloride resin layer.
The heat sealing layer is further filled with modified filler, the modified filler is one of modified graphene or modified montmorillonite, and the addition amount of the modified filler is 3% of the mass of the heat sealing layer.
PX has high temperature resistance, the intensity and the rigidity of polypropylene are higher, especially have outstanding bending fatigue resistance, because it is nonpolar high polymer, have good electrical insulation, more have good heat resistance, hardly absorb water, except strong oxidizing acid, other acid is basically very stable, alkali resistance is more outstanding, so use both compositely as the protective layer, the protective property and the performance of battery packaging film have been improved, the upper surface and the lower surface of aluminium foil layer set up the recess respectively, show the joint strength who has improved between aluminium foil layer and the adjacent layer structure, thereby improved the resistant peel strength between each layer in the packaging film, after the packaging film is used for a long time, can not take place to peel off between each layer.
The strength and rigidity of the enhanced polyvinyl chloride resin layer are multiplied, the acid and alkali resistance is excellent, and by adopting the structure, the overall strength and the service performance of the packaging film are further improved.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A flexible packaging film of a polymer lithium ion battery is characterized in that: the aluminum foil heat-seal adhesive tape comprises a composite protective layer, a first adhesive layer, an aluminum foil layer, a polyvinyl chloride resin layer, a second adhesive layer and a heat-seal layer which are sequentially stacked, wherein the composite protective layer comprises a TPX thin film layer and a polypropylene layer, the TPX thin film layer and the polypropylene layer are connected through an adhesive, a plurality of grooves and corrosion-resistant layers are respectively arranged on the upper surface and the lower surface of the aluminum foil layer, the heat-seal layer is made of polycarbonate resin, and the thickness of the heat-seal layer is 20-30 mu m.
2. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the polyvinyl chloride resin layer is a reinforced polyvinyl chloride resin layer, and the reinforced polyvinyl chloride resin layer is a glass fiber modified polyvinyl chloride resin layer.
3. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the addition amount of the glass fiber in the glass fiber modified polyvinyl chloride resin layer is 1-5% of the mass of the polyvinyl chloride resin layer.
4. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the thickness of the aluminum foil layer is 60-80 μm.
5. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the thickness of the composite protective layer is 20-40 μm.
6. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the heat sealing layer is also filled with modified filler, and the modified filler is one of modified graphene or modified montmorillonite.
7. The flexible packaging film of the polymer lithium ion battery according to claim 6, wherein: the addition amount of the modified filler is 1-3% of the mass of the heat seal layer.
8. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: the groove is in a conical shape or a regular pyramid shape, and the depth of the groove is 100nm and 300 nm.
9. The flexible packaging film of the polymer lithium ion battery according to claim 1, wherein: and a plurality of anti-skid grains are respectively arranged on the contact surface between the TPX film layer and the polypropylene layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243424.6A CN111341950A (en) | 2020-03-31 | 2020-03-31 | Packaging film of polymer lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243424.6A CN111341950A (en) | 2020-03-31 | 2020-03-31 | Packaging film of polymer lithium ion battery |
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| CN111341950A true CN111341950A (en) | 2020-06-26 |
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|---|---|---|---|
| CN202010243424.6A Pending CN111341950A (en) | 2020-03-31 | 2020-03-31 | Packaging film of polymer lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115195234A (en) * | 2022-06-27 | 2022-10-18 | 浙江海顺新能源材料有限公司 | High-barrier aluminum-foil-free soft package lithium battery packaging film and preparation method thereof |
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| CN109378410A (en) * | 2018-09-26 | 2019-02-22 | 成都新柯力化工科技有限公司 | A kind of lithium battery anticorrosion aluminum plastic film |
| CN109449319A (en) * | 2018-10-24 | 2019-03-08 | 无锡恩捷新材料科技有限公司 | A kind of soft bag lithium ionic cell aluminum plastic film |
| CN110667212A (en) * | 2019-10-17 | 2020-01-10 | 常州斯威克光伏新材料有限公司 | Soft packaging film for lithium battery |
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| CN115195234A (en) * | 2022-06-27 | 2022-10-18 | 浙江海顺新能源材料有限公司 | High-barrier aluminum-foil-free soft package lithium battery packaging film and preparation method thereof |
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