CN111430586A - High-buffer packaging film for lithium battery - Google Patents
High-buffer packaging film for lithium battery Download PDFInfo
- Publication number
- CN111430586A CN111430586A CN202010367292.8A CN202010367292A CN111430586A CN 111430586 A CN111430586 A CN 111430586A CN 202010367292 A CN202010367292 A CN 202010367292A CN 111430586 A CN111430586 A CN 111430586A
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- China
- Prior art keywords
- layer
- foaming
- packaging film
- lithium battery
- foaming layer
- 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.)
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- 239000012785 packaging film Substances 0.000 title claims abstract description 43
- 229920006280 packaging film Polymers 0.000 title claims abstract description 43
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 196
- 238000005187 foaming Methods 0.000 claims abstract description 85
- 239000011241 protective layer Substances 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 239000004677 Nylon Substances 0.000 claims abstract description 28
- 229920001778 nylon Polymers 0.000 claims abstract description 28
- 238000005260 corrosion Methods 0.000 claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 23
- 239000012790 adhesive layer Substances 0.000 claims abstract description 21
- 239000011888 foil Substances 0.000 claims abstract description 19
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 15
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 13
- 239000004917 carbon fiber Substances 0.000 claims abstract description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 230000003139 buffering effect Effects 0.000 claims abstract description 8
- 230000007797 corrosion Effects 0.000 claims description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910021389 graphene Inorganic materials 0.000 claims description 16
- 229920002125 Sokalan® Polymers 0.000 claims description 13
- 239000004584 polyacrylic acid Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 238000004049 embossing Methods 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 8
- 239000005030 aluminium foil Substances 0.000 description 4
- 238000009459 flexible packaging Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- -1 first bond line Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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 of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
-
- 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
- B32B1/00—Layered products having a general shape other than plane
-
- 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
- B32B27/32—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
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- 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
-
- 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
-
- 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 invention relates to the technical field of battery packaging films, in particular to a high-buffer packaging film for a lithium battery, which comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the upper surface of the aluminum foil layer is coated with an anti-corrosion layer, and the inner composite protective layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer; according to the packaging film, the first foaming layer and the second foaming layer are respectively arranged on the two sides of the aluminum foil layer, so that the overall flexibility and the compression buffering performance of the packaging film are obviously improved, and the carbon fiber layer is filled in the second foaming layer, so that the tensile strength of the second foaming layer can be improved, the impact resistance and the tensile strength of the packaging film are improved, the probability that the packaging film is damaged in the production process is reduced, and the use safety is improved.
Description
Technical Field
The invention relates to the technical field of battery packaging films, in particular to a packaging film for a high-buffer lithium battery.
Background
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 weight of the soft package battery is 40% lighter than that of a steel shell lithium battery with the same capacity, and is 20% lighter than that of an aluminum shell lithium battery; the internal resistance is small, the internal resistance of the soft package battery is smaller than that of a lithium battery, and the self power consumption of the battery can be greatly reduced; the cycle performance is good, the cycle life of the soft package battery is longer, and the cycle attenuation of 100 times is 4-7% less than that of an aluminum shell; the design is flexible, the appearance can be changed into any shape, the thickness can be thinner, and the novel battery cell model can be developed according to the customization of the requirements of customers.
The flexible packaging film can bubble after being used for a long time, so that a user can pay attention to the flexible packaging film and timely handle the flexible packaging film, the use safety is improved, certain external force needs to be borne in the preparation process of the packaging film and the packaging bag, damage to different degrees can occur sometimes, and the packaging performance can be reduced.
Disclosure of Invention
The purpose of the invention is: the packaging film for the high-buffer lithium battery has the advantages of overcoming defects in the prior art, along with strong buffering performance and no damage in the production process.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a high buffering is packaging film for lithium cell, includes outer compound protective layer, first bond line, aluminium foil layer, second bond line, interior compound protective layer, third bond line and heat-seal layer, outer compound protective layer includes nylon layer and first foaming layer, be connected through first adhesive between nylon layer and the first foaming layer, the upper surface coating on aluminium foil layer has one deck corrosion resistant layer, interior compound protective layer includes second foaming layer and fills the intraformational carbon fiber layer of second foaming.
Furthermore, the contact surface between the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid protrusions, and the grooves and the regular polygonal pyramid protrusions are arranged at intervals.
Furthermore, the grooves and the regular polygonal pyramids are arranged at equal intervals, and the distance between each groove and the adjacent regular polygonal pyramids is 1-2 cm.
Further, the depth of the groove is equal to the height of the regular polygonal pyramid.
Furthermore, the upper surface and the lower surface of the second foaming layer are provided with embossments, and the height of the embossments higher than the surface of the second foaming layer is one third of the thickness of the second foaming layer.
Further, the thickness of the corrosion-resistant layer is 100-200nm, and the corrosion-resistant layer is a polyacrylic acid layer added with nano-alumina.
Furthermore, the addition amount of the nano alumina is 5-10% of the mass of the polyacrylic acid layer.
Further, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.2-0.3%.
The technical scheme adopted by the invention has the beneficial effects that:
according to the packaging film, the first foaming layer and the second foaming layer are respectively arranged on the two sides of the aluminum foil layer, so that the overall flexibility and the compression buffering performance of the packaging film are obviously improved, and the carbon fiber layer is filled in the second foaming layer, so that the tensile strength of the second foaming layer can be improved, the impact resistance and the tensile strength of the packaging film are improved, the probability that the packaging film is damaged in the production process is reduced, and the use safety is improved.
According to the invention, the contact surface between the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid protrusions, and the grooves and the regular polygonal pyramid protrusions are arranged at intervals.
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.
The utility model provides a high buffering is packaging film for lithium cell, includes outer compound protective layer, first bond line, aluminium foil layer, second bond line, interior compound protective layer, third bond line and heat-seal layer, outer compound protective layer includes nylon layer and first foaming layer, be connected through first adhesive between nylon layer and the first foaming layer, the upper surface coating on aluminium foil layer has one deck corrosion resistant layer, interior compound protective layer includes second foaming layer and fills the intraformational carbon fiber layer of second foaming. According to the packaging film, the first foaming layer and the second foaming layer are respectively arranged on the two sides of the aluminum foil layer, so that the overall flexibility and the compression buffering performance of the packaging film are obviously improved, and the carbon fiber layer is filled in the second foaming layer, so that the tensile strength of the second foaming layer can be improved, the impact resistance and the tensile strength of the packaging film are improved, the probability that the packaging film is damaged in the production process is reduced, and the use safety is improved.
As a preferred embodiment, the contact surface between the first foaming layer and the nylon layer in this embodiment is concave-convex, and includes a plurality of grooves and regular polygonal pyramid protrusions, and the grooves and the regular polygonal pyramid protrusions are arranged at intervals.
As a preferred embodiment, the grooves and the regular pyramids in this embodiment are arranged at equal intervals, and the distance between each groove and the adjacent regular pyramids is 1-2cm, so that the impact resistance of the first foaming layer is not affected, and the strength of the first foaming layer can be improved by reversely forming the regular pyramids.
As a preferred embodiment, the depth of the groove in this embodiment is equal to the height of the regular polygonal pyramid.
As a preferred embodiment, in this embodiment, the upper surface and the lower surface of the second foamed layer are both embossed, and the height of the embossing higher than the surface of the second foamed layer is one third of the thickness of the second foamed layer, so that the structure is helpful to improve the connection strength between the second foamed layer and other layers, avoid the peeling phenomenon during use, and improve the overall performance of the packaging film.
As a preferred embodiment, the thickness of the corrosion-resistant layer in the embodiment is 100-200nm, and the corrosion-resistant layer is a polyacrylic acid layer added with nano-alumina.
In a preferred embodiment, the amount of nano alumina added in the present embodiment is 5 to 10% by mass of the polyacrylic acid layer.
As a preferred embodiment, the heat-sealing layer in this example is a CPP film filled with graphene, and the addition amount of the graphene is 0.2 to 0.3%.
Example 1
A high-buffer packaging film for a lithium battery comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the contact surface of the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid protrusions, the grooves and the regular polygonal pyramid protrusions are arranged at intervals, the grooves and the regular polygonal pyramids are arranged at equal intervals, the distance between each groove and an adjacent regular polygonal pyramid is 1cm, the depth of each groove is equal to the height of each regular polygonal pyramid, the upper surface of the aluminum foil layer is coated with an anti-corrosion layer, the thickness of the anti-corrosion layer is 100nm, the anti-corrosion layer is a polyacrylic acid layer added with nano aluminum oxide, the addition amount of the nano aluminum oxide is 5% of the mass of the polyacrylic acid layer, the inner composite protection layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer, wherein the upper surface and the lower surface of the second foaming layer are respectively provided with an embossing, the height of the embossing, which is higher than the surface of the second foaming layer, is one third of the thickness of the second foaming layer, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.2%.
Example 2
A high-buffer packaging film for a lithium battery comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the contact surface of the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid bulges, the grooves and the regular polygonal pyramid bulges are arranged at intervals, the grooves and the regular polygonal pyramids are arranged at equal intervals, the distance between each groove and the adjacent regular polygonal pyramids is 1.2cm, the depth of each groove is equal to the height of each regular polygonal pyramid, the upper surface of the aluminum foil layer is coated with a corrosion-resistant layer, the thickness of the corrosion-resistant layer is 120nm, the corrosion-resistant layer is a polyacrylic acid layer added with nano aluminum oxide, and the addition amount of the nano aluminum oxide is 6% of the mass of the polyacrylic, the inner composite protection layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer, wherein the upper surface and the lower surface of the second foaming layer are respectively provided with an embossing, the height of the embossing, which is higher than the surface of the second foaming layer, is one third of the thickness of the second foaming layer, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.21%.
Example 3
A high-buffer packaging film for a lithium battery comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the contact surface of the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid bulges, the grooves and the regular polygonal pyramid bulges are arranged at intervals, the grooves and the regular polygonal pyramids are arranged at equal intervals, the distance between each groove and the adjacent regular polygonal pyramids is 1.5cm, the depth of each groove is equal to the height of each regular polygonal pyramid, the upper surface of the aluminum foil layer is coated with a corrosion-resistant layer, the thickness of the corrosion-resistant layer is 150nm, the corrosion-resistant layer is a polyacrylic acid layer added with nano aluminum oxide, and the addition amount of the nano aluminum oxide is 7% of the mass of the polyacrylic, the inner composite protection layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer, wherein the upper surface and the lower surface of the second foaming layer are respectively provided with an embossing, the height of the embossing, which is higher than the surface of the second foaming layer, is one third of the thickness of the second foaming layer, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.25%.
Example 4
A high-buffer packaging film for a lithium battery comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the contact surface of the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid bulges, the grooves and the regular polygonal pyramid bulges are arranged at intervals, the grooves and the regular polygonal pyramids are arranged at equal intervals, the distance between each groove and the adjacent regular polygonal pyramids is 1.8cm, the depth of each groove is equal to the height of each regular polygonal pyramid, the upper surface of the aluminum foil layer is coated with a corrosion-resistant layer, the thickness of the corrosion-resistant layer is 180nm, the corrosion-resistant layer is a polyacrylic acid layer added with nano aluminum oxide, and the addition amount of the nano aluminum oxide is 9% of the mass of the polyacrylic, the inner composite protection layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer, wherein the upper surface and the lower surface of the second foaming layer are respectively provided with an embossing, the height of the embossing, which is higher than the surface of the second foaming layer, is one third of the thickness of the second foaming layer, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.28%.
Example 5
A high-buffer packaging film for a lithium battery comprises an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the contact surface of the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid protrusions, the grooves and the regular polygonal pyramid protrusions are arranged at intervals, the grooves and the regular polygonal pyramids are arranged at equal intervals, the distance between each groove and an adjacent regular polygonal pyramid is 2cm, the depth of each groove is equal to the height of each regular polygonal pyramid, the upper surface of the aluminum foil layer is coated with an anti-corrosion layer, the thickness of the anti-corrosion layer is 200nm, the anti-corrosion layer is a polyacrylic acid layer added with nano aluminum oxide, the addition amount of the nano aluminum oxide is 10% of the mass of the polyacrylic acid layer, the inner composite protection layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer, wherein the upper surface and the lower surface of the second foaming layer are respectively provided with an embossing, the height of the embossing, which is higher than the surface of the second foaming layer, is one third of the thickness of the second foaming layer, the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.3%.
According to the packaging film, the first foaming layer and the second foaming layer are respectively arranged on the two sides of the aluminum foil layer, so that the overall flexibility and the compression buffering performance of the packaging film are obviously improved, and the carbon fiber layer is filled in the second foaming layer, so that the tensile strength of the second foaming layer can be improved, the impact resistance and the tensile strength of the packaging film are improved, the probability that the packaging film is damaged in the production process is reduced, and the use safety is improved.
According to the invention, the contact surface between the first foaming layer and the nylon layer is concave-convex and comprises a plurality of grooves and regular polygonal pyramid protrusions, and the grooves and the regular polygonal pyramid protrusions are arranged at intervals.
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 (8)
1. The utility model provides a high buffering packaging film for lithium cell which characterized in that: the composite aluminum foil is characterized by comprising an outer composite protective layer, a first adhesive layer, an aluminum foil layer, a second adhesive layer, an inner composite protective layer, a third adhesive layer and a heat sealing layer, wherein the outer composite protective layer comprises a nylon layer and a first foaming layer, the nylon layer is connected with the first foaming layer through a first adhesive, the upper surface of the aluminum foil layer is coated with an anti-corrosion layer, and the inner composite protective layer comprises a second foaming layer and a carbon fiber layer filled in the second foaming layer.
2. The packaging film for a high-buffer lithium battery as claimed in claim 1, wherein: the first foaming layer is concave-convex with the contact surface of the nylon layer, and comprises a plurality of grooves and regular polygonal pyramid protrusions, wherein the grooves and the regular polygonal pyramid protrusions are arranged at intervals.
3. The packaging film for a high-buffer lithium battery as claimed in claim 2, wherein: the grooves and the regular polygonal pyramids are arranged at equal intervals, and the distance between each groove and the adjacent regular polygonal pyramids is 1-2 cm.
4. The packaging film for a high-buffer lithium battery as claimed in claim 2, wherein: the depth of the groove is equal to the height of the regular polygonal pyramid.
5. The packaging film for a high-buffer lithium battery as claimed in claim 1, wherein: the upper surface and the lower surface of the second foaming layer are provided with embossments, and the height of the embossments higher than the surface of the second foaming layer is one third of the thickness of the second foaming layer.
6. The packaging film for a high-buffer lithium battery as claimed in claim 1, wherein: the thickness of the corrosion-resistant layer is 100-200nm, and the corrosion-resistant layer is a polyacrylic acid layer added with nano aluminum oxide.
7. The packaging film for a high-buffer lithium battery as claimed in claim 6, wherein: the addition amount of the nano alumina is 5-10% of the mass of the polyacrylic acid layer.
8. The packaging film for a high-buffer lithium battery as claimed in claim 1, wherein: the heat sealing layer is a CPP film filled with graphene, and the addition amount of the graphene is 0.2-0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367292.8A CN111430586A (en) | 2020-05-01 | 2020-05-01 | High-buffer packaging film for lithium battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010367292.8A CN111430586A (en) | 2020-05-01 | 2020-05-01 | High-buffer packaging film for lithium battery |
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|---|---|
| CN111430586A true CN111430586A (en) | 2020-07-17 |
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| CN202010367292.8A Pending CN111430586A (en) | 2020-05-01 | 2020-05-01 | High-buffer packaging film for lithium battery |
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| CN204558559U (en) * | 2015-02-10 | 2015-08-12 | 江阴骏驰光电科技有限公司 | A kind of lithium battery aluminum-plastic film of high-ductility high sealing |
| 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 |
| CN110744904A (en) * | 2019-10-11 | 2020-02-04 | 成都新柯力化工科技有限公司 | Elastic aluminum plastic film for lithium battery flexible package and preparation method |
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2020
- 2020-05-01 CN CN202010367292.8A patent/CN111430586A/en active Pending
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| CN110744904A (en) * | 2019-10-11 | 2020-02-04 | 成都新柯力化工科技有限公司 | Elastic aluminum plastic film for lithium battery flexible package and preparation method |
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