CN113594593B - Design method of aluminum plastic film and aluminum plastic film - Google Patents
Design method of aluminum plastic film and aluminum plastic film Download PDFInfo
- Publication number
- CN113594593B CN113594593B CN202110783356.7A CN202110783356A CN113594593B CN 113594593 B CN113594593 B CN 113594593B CN 202110783356 A CN202110783356 A CN 202110783356A CN 113594593 B CN113594593 B CN 113594593B
- Authority
- CN
- China
- Prior art keywords
- plastic film
- aluminum
- film
- aluminum plastic
- 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.)
- Active
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 134
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 133
- 239000002985 plastic film Substances 0.000 title claims abstract description 123
- 229920006255 plastic film Polymers 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004080 punching Methods 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims description 82
- 239000011888 foil Substances 0.000 claims description 33
- 239000004952 Polyamide Substances 0.000 claims description 30
- 229920002647 polyamide Polymers 0.000 claims description 30
- 229920000098 polyolefin Polymers 0.000 claims description 29
- 239000011241 protective layer Substances 0.000 claims description 26
- 229920005992 thermoplastic resin Polymers 0.000 claims description 24
- 229920006267 polyester film Polymers 0.000 claims description 22
- 239000003292 glue Substances 0.000 claims description 17
- 229920002635 polyurethane Polymers 0.000 claims description 10
- 239000004814 polyurethane Substances 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000002161 passivation Methods 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052744 lithium Inorganic materials 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- -1 polyethylene terephthalate Polymers 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000002788 crimping Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 229920002292 Nylon 6 Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 229920000305 Nylon 6,10 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
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 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
- H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
-
- 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
- B32B15/088—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 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
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin 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
-
- 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
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- 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
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- 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
- H01M50/117—Inorganic material
- H01M50/119—Metals
-
- 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
- H01M50/121—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 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
- H01M50/126—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- 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 belongs to the technical field of lithium battery outer packaging, and particularly discloses a design method of an aluminum plastic film and the aluminum plastic film, wherein the design method comprises the following steps: step 1, designing an aluminum plastic film; step 2. The aluminum plastic film designed based on the step 1 passes through the formula S= (T) A *D A +T B *D B *3）/（T C *D C * 2) Calculating a curling index to predict the punching curling degree of the aluminum plastic film; and step 3, if the step 2 predicts that the aluminum-plastic film does not generate stamping curl, finishing the design, otherwise, returning to the step 1 to redesign the aluminum-plastic film. According to the invention, the crimp degree of the aluminum-plastic film can be predicted by punching through the crimp index, so that the crimp performance of the aluminum-plastic film can be predicted before punching, unnecessary design and production are reduced, the test cost and time loss are effectively reduced, and the aluminum-plastic film with the punched shell unreeled is rapidly designed.
Description
Technical Field
The invention belongs to the technical field of lithium battery outer packaging, and particularly relates to a design method of an aluminum plastic film and the aluminum plastic film designed by the method.
Background
The aluminum plastic film of the soft package lithium battery outer package is composed of a plurality of layers of films, wherein the most common structure is that a protective layer, a metal foil layer and a thermoplastic resin layer are sequentially laminated from outside to inside, and the layers are bonded through an adhesive. After the aluminum plastic film is manufactured, the lithium battery is packaged, and the application steps are as follows: 1. firstly, punching a shell by an aluminum plastic film to form a shell; 2. placing an electric core in the shell for top side heat sealing; 3. after heat sealing, forming, injecting liquid and sealing; 4. and (5) curing.
Nylon or polyethylene terephthalate (PET) materials are commonly used as a protective layer of the aluminum plastic film, after the shell is punched, the shell is curled outwards due to stress stretching of the nylon or PET, and the curling can increase the operation difficulty of staff in the processes of edge cutting, discharging core, top sealing and side sealing and also influence the yield of the battery; moreover, the curling can not be found before punching the shell, the curling condition can be judged after the shell is punched by the product production every time, the structural design test cost for the aluminum plastic film is high, and the time is long.
Disclosure of Invention
In order to solve the problems, the invention provides a design method of an aluminum plastic film, which can pre-judge the curling property of the aluminum plastic film before punching a shell, reduce test cost and rapidly design the aluminum plastic film with the punched shell unreeled.
In order to achieve the above purpose, the invention adopts the following specific technical scheme:
the design method of the aluminum plastic film comprises the following steps:
An aluminum foil layer between the thermoplastic resin layer and the protective layer; selecting at least one of a polyamide film and a polyester film as a protective layer of the aluminum plastic film; selecting a polyolefin film as a thermoplastic resin layer of the aluminum plastic film;
step 21, calculating the curl index of the aluminum plastic film by adopting the following formula:
S=（T A *D A +T B *D B *3）/（T C *D C * 2) Wherein T is A 、T B 、T C Tensile strength, D, of polyamide film, polyester film, polyolefin film, respectively A 、D B 、D C The thickness of the polyamide film, the polyester film and the polyolefin film respectively;
step 22, if S is smaller than the threshold value and equal to S1, predicting that the aluminum plastic film cannot be curled by stamping; otherwise the first set of parameters is selected,
then the aluminum plastic film is predicted to be curled by punching;
And redesigning the aluminum plastic film.
The invention evaluates and judges the curling performance of the aluminum plastic film according to the magnitude of the curling index S, and on the premise that the battery model and the shell punching equipment are the same, the curling index S and the curling performance of the aluminum plastic film are in positive correlation, and the smaller the S value is, the weaker the capability of the aluminum plastic film, namely the shell, to curl outwards is.
Preferably, when the double-pit 126090 battery deep-drawing die is used for punching, the value of the threshold S1 is 1.5; when the double-pit 802030 battery deep-drawing die is used for punching, the threshold value S1 is 1.67. The difference between the battery model and the can punching equipment also has a great influence on the crimping performance, so that the threshold S1 is different under different deep punching dies.
Preferably, the polyamide film is selected from polycaprolactam, polyhexamethylene adipate, polyisoxylylene adipamide, polyhexamethylene sebacamide, and the like; the polyester film is selected from polyethylene terephthalate, polyethylene naphthalate and the like; the polyolefin film is selected from polyethylene, polypropylene, olefin copolymer, olefin acid modifier, etc.
Preferably, the surface of the aluminum foil layer is subjected to passivation treatment. The passivation film is arranged on the surface of the aluminum foil layer after passivation treatment, so that the connection firmness between the aluminum foil layer and the thermoplastic resin layer and the protection layer can be improved, the influence of layering or single-layer warping on the judgment of the curling performance of the aluminum plastic film caused by weak bonding in the shell punching process is avoided, and the accuracy of the method is improved.
Preferably, the layers of the aluminum plastic film are adhered by an adhesive, and the adhesive is polyurethane or acrylic glue. Furthermore, the aluminum foil layer is bonded with the protective layer through polyurethane glue, and the aluminum foil layer is bonded with the thermoplastic resin layer through acrylic glue. The adhesive can be used for improving the connection firmness between the aluminum foil layer and the thermoplastic resin layer and between the aluminum foil layer and the protective layer, avoiding the problem that the curling performance cannot be accurately reflected due to weak adhesion, and improving the accuracy of the method.
The invention also provides the aluminum-plastic film which is not rolled by the punching shell and is designed by the design method of the aluminum-plastic film. Specifically, the aluminum-plastic film comprises a thermoplastic resin layer, a protective layer and an aluminum foil layer arranged between the thermoplastic resin layer and the protective layer; the protective layer of the aluminum plastic film is at least one of a polyamide film and a polyester film; a thermoplastic resin layer of the aluminum plastic film; the aluminum plastic film meets the following conditions: s= (T A *D A +T B *D B *3）/（T C *D C * 2) S is less than or equal to a threshold S1, where T A 、T B 、T C Tensile strength, D, of polyamide film, polyester film, polyolefin film, respectively A 、D B 、D C The thickness of the polyamide film, the polyester film and the polyolefin film respectively; when the double-pit 126090 type battery deep stamping die is used for stamping, the value of the threshold S1 is 1.5; when the double-pit 802030 battery deep-drawing die is used for punching, the threshold value S1 is 1.67.
The invention has the following beneficial effects:
1. according to the design method of the aluminum plastic film, the problem of shell punching and curling of the aluminum plastic film is fundamentally solved by designing the aluminum plastic film with the unreturned shell, the shell punching quality of the aluminum plastic film is ensured, and the yield of the soft-package battery is effectively improved.
2. The invention provides a crimping index calculation formula aiming at an aluminum plastic film of the type comprising a thermoplastic resin layer, a protective layer and an aluminum foil layer arranged between the thermoplastic resin layer and the protective layer, wherein the protective layer is at least one of a polyamide film and a polyester film, the protective layer is a polyolefin film, the crimping index S and the crimping performance of the aluminum plastic film are in positive correlation, whether the aluminum plastic film can be crimped by stamping can be judged through the crimping index, and crimping judgment is not needed after the aluminum plastic film is stamped, so that unnecessary design and production are reduced, the test cost and time loss are effectively reduced, and the aluminum plastic film with a stamped shell which is not rolled is rapidly designed.
Drawings
Fig. 1: the structure of the aluminum plastic film A-1 in the embodiment 1 of the invention is schematically shown.
Fig. 2: the structure of the aluminum plastic film B-1 in the embodiment 1 of the invention is schematically shown.
In the figure: 1-polyolefin film, 2-first adhesive layer, 3-aluminum foil layer, 4-second adhesive layer, 5-polyamide film, 6-third adhesive layer, 7-polyester film.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
Examples
The embodiment provides a design method of an aluminum plastic film, which comprises the following steps:
step 21, calculating the curl index of the aluminum plastic film by adopting the following formula:
S=（T A *D A +T B *D B *3）/（T C *D C * 2) Wherein T is A 、T B 、T C Tensile strength, D, of polyamide film, polyester film, polyolefin film, respectively A 、D B 、D C The thickness of the polyamide film, the polyester film and the polyolefin film respectively;
step 22, if S is smaller than or equal to a threshold S1, predicting that the aluminum plastic film cannot be curled by stamping; otherwise, predicting that the aluminum-plastic film can be curled by stamping; when the double-pit 126090 type battery deep stamping die is used for stamping, the value of the threshold S1 is 1.5; when the double-pit 802030 type battery deep drawing die is used for the drawing, the threshold S1 has a value of 1.67.
And 3, if the step 2 predicts that the aluminum-plastic film does not generate stamping curl, ending the design, otherwise, returning to the step 1, and correspondingly redesigning the aluminum-plastic film by changing the parameter value in the curl index formula.
The embodiment also provides an application example of the aluminum plastic film design according to the design method of the aluminum plastic film.
1. Aluminum plastic film design (the following 10 types of aluminum plastic films are specifically designed)
A-1: a lithium battery flexible package aluminum plastic film, as shown in figure 1, comprises a polyolefin film 1, a first bonding layer 2, an aluminum foil layer 3, a second bonding layer 4 and a polyamide film 5 which are sequentially laminated; the polyolefin film 1 is made of polypropylene, and has a thickness of 50 mu m and a tensile strength of 30 MPa; the polyamide film 5 is made of nylon 6, has a thickness of 20 mu m and a tensile strength of 200 MPa; the first bonding layer 2 is formed by curing acrylic glue, the second bonding layer 4 is formed by curing polyurethane glue, and the upper surface and the lower surface of the aluminum foil layer 3 are subjected to passivation treatment;
the flexible package aluminum plastic film of the lithium battery adopts a conventional preparation method, and comprises the following specific processes:
a. the inside and outside surfaces of the aluminum foil layer 3 having a thickness of 40 μm were coated with a chromate treatment solution (3% by mass solids)) Oven-dried at 180deg.C to form a chromium content of 10mg/m on both surfaces of the aluminum foil layer 3 2 A passivation film of (a);
b. coating polyurethane glue on one side of the aluminum foil layer 3, drying in an oven at 80 ℃ to form a second bonding layer 4, and compositing a polyamide film 5 with the thickness of 20 mu m with the second bonding layer 4 through a compression roller;
c. coating acrylic glue on the other side of the aluminum foil layer 3, drying in a baking oven at 110 ℃ to form a first bonding layer 2, and compositing a polyolefin film 1 with the thickness of 50 mu m with the first bonding layer 2 through a compression roller;
d. and curing the laminated body for 6 days at the temperature of 60 ℃ to obtain the lithium battery flexible package aluminum plastic film.
A-2: a lithium battery flexible package aluminum plastic film has the structure basically same as that of the embodiment A-1, and the difference is that: the thickness of the polyamide film 5 is 15 mu m, and the tensile strength is 180MPa; the thickness of the polyolefin film 1 was 30. Mu.m.
A-3: a lithium battery flexible package aluminum plastic film has the structure basically same as that of the embodiment A-1, and the difference is that: the thickness of the polyamide film 5 is 15 mu m, and the tensile strength is 180MPa; the thickness of the polyolefin film 1 was 40. Mu.m.
A-4: a lithium battery flexible package aluminum plastic film has the structure basically same as that of the embodiment A-1, and the difference is that: the polyamide film 5 had a thickness of 15 μm and a tensile strength of 180MPa.
A-5A lithium battery flexible package aluminum plastic film has the structure basically same as that of the embodiment A-1, and the difference is that: the tensile strength of the polyolefin film 1 was 24 MPa.
A-6A flexible package aluminum plastic film for lithium battery has the structure basically same as that of the embodiment A-1, and the difference is that: the thickness of the polyamide film 5 was 25. Mu.m, and the thickness of the polyolefin film 1 was 40. Mu.m.
B-1: as shown in fig. 2, the lithium battery flexible package aluminum plastic film comprises a polyolefin film 1, a first bonding layer 2, an aluminum foil layer 3, a second bonding layer 4, a polyamide film 5, a third bonding layer 6 and a polyester film 7 which are sequentially laminated; the polyolefin film 1 is made of polypropylene, and has a thickness of 80 mu m and a tensile strength of 30 MPa; the polyamide film 5 is made of nylon 6, has a thickness of 15 mu m and a tensile strength of 200 MPa; the polyester film 7 is made of PET, has a thickness of 6 mu m and a tensile strength of 200 MPa; the first bonding layer 2 is formed by curing acrylic glue, the second bonding layer 4 and the third bonding layer 6 are formed by curing polyurethane glue, and the upper surface and the lower surface of the aluminum foil layer 3 are subjected to passivation treatment;
the flexible package aluminum plastic film of the lithium battery adopts a conventional preparation method, and comprises the following specific processes:
a. coating both inner and outer surfaces of an aluminum foil layer 3 having a thickness of 40 μm with a chromate treatment solution (3% by mass solids), oven-drying at 180℃to thereby form a chromium content of 10mg/m on both surfaces of the metal foil layer 3 2 A passivation film of (a);
b. coating polyurethane glue on one side of the aluminum foil layer 3, drying in an oven at 80 ℃ to form a second bonding layer 4, and compositing a polyamide film 5 with the thickness of 15 mu m with the second bonding layer 4 through a compression roller;
c. coating polyurethane glue on the laminated polyamide film 5, drying in an oven at 80 ℃ to form a third bonding layer 6, and compositing the polyester film 7 with the thickness of 6 mu m and the third bonding layer 6 through a compression roller;
d. coating acrylic glue on the other side of the aluminum foil layer 3, drying in a baking oven at 110 ℃ to form a first bonding layer 2, and compositing a polyolefin film 1 with the thickness of 80 mu m with the first bonding layer 2 through a compression roller;
e. and curing the laminated body for 6 days at the temperature of 60 ℃ to obtain the lithium battery flexible package aluminum plastic film.
B-2: a lithium battery flexible package aluminum plastic film has a structure basically same as that of the embodiment B-1, and is only different in that: the thickness of the polyamide film 5 was 25. Mu.m.
B-3: a lithium battery flexible package aluminum plastic film has a structure basically same as that of the embodiment B-1, and is only different in that: the thickness of the polyolefin film 1 was 40. Mu.m.
B-4: a lithium battery flexible package aluminum plastic film has a structure basically same as that of the embodiment B-1, and is only different in that: the thickness of the polyolefin film 1 was 40. Mu.m, and the thickness of the polyester film 7 was 9. Mu.m.
2. Judging whether the aluminum plastic film can be subjected to shell punching and curling according to the curling index
According to S= (T A *D A +T B *D B *3）/（T C *D C * 2) The bending index of the aluminum plastic film is calculated according to the formula, and is shown in the table:
when the double-pit 126090 type battery deep stamping die is used for stamping: the curling indexes of the aluminum plastic films A-1, A-2, A-3, A-4, B-1 and B-2 are less than or equal to 1.5, the punching shell is judged to be not curled, and the aluminum plastic films can be directly produced after the design is finished; the curling indexes of the aluminum plastic films A-5, A-6, B-3 and B-4 exceed 1.5, and the aluminum plastic films are judged to be subjected to shell punching curling and cannot be put into production, so that the aluminum plastic films are required to be redesigned.
When the double-pit 802030 type battery deep stamping die is used for stamping, the curling indexes of the aluminum plastic films A-1, A-2, A-3, A-4, A-5, B-1 and B-2 are less than or equal to 1.67, the stamped shell is judged to be not coiled, and the aluminum plastic films can be directly produced after the design is finished; the curling indexes of the aluminum plastic films A-6, B-3 and B-4 exceed 1.67, and the aluminum plastic films are judged to be curled by punching, cannot be put into production and need to be redesigned.
In this embodiment, the above-mentioned aluminum plastic film is subjected to a shell punching test, and the shell punching test method is as follows: the lithium battery flexible package aluminum plastic film is cut into samples with the width of 60mm and the width of 120mm, and the samples are respectively subjected to deep punching test in a double-pit 126090 and double-pit 802030 type battery die, and the curling angle, namely the angle formed by the curled edge and the horizontal plane, is recorded. The test results are shown in the following table, and it can be seen that the test results of the curling angle are consistent with the curling results judged according to the S value, so that the curling index of the invention can accurately reflect the curling condition of the punched shell of the aluminum plastic film.
The present embodiments are merely illustrative of the invention and not limiting of the invention, and any changes made by those skilled in the art after reading the specification of the invention will be protected by the patent laws within the scope of the appended claims.
Claims (5)
1. A design method of an aluminum plastic film is characterized by comprising the following steps: the method comprises the following steps:
step 1, designing an aluminum plastic film: the aluminum-plastic film comprises a thermoplastic resin layer, a protective layer and an aluminum foil layer arranged between the thermoplastic resin layer and the protective layer; selecting at least one of a polyamide film and a polyester film as a protective layer of the aluminum plastic film; selecting a polyolefin film as a thermoplastic resin layer of the aluminum plastic film;
step 2, predicting the stamping curling degree of the aluminum plastic film based on the aluminum plastic film designed in the step 1, wherein the step 2 comprises the following steps:
step 21, calculating the curl index of the aluminum plastic film by adopting the following formula:
S=（T A *D A +T B *D B *3）/（T C *D C * 2) Wherein T is A 、T B 、T C Tensile strength, D, of polyamide film, polyester film, polyolefin film, respectively A 、D B 、D C The thickness of the polyamide film, the polyester film and the polyolefin film respectively;
step 22, if S is smaller than or equal to a threshold S1, predicting that the aluminum plastic film cannot be curled by stamping; otherwise, predicting that the aluminum-plastic film can be curled by stamping;
step 3, if the step 2 predicts that the aluminum-plastic film does not generate stamping curl, finishing the design, otherwise, returning to the step 1 to redesign the aluminum-plastic film;
when the double-pit 126090 type battery deep stamping die is used for stamping, the value of the threshold S1 is 1.5; when the double-pit 802030 battery deep-drawing die is used for punching, the threshold value S1 is 1.67.
2. The method for designing an aluminum plastic film according to claim 1, wherein: and the surface of the aluminum foil layer is subjected to passivation treatment.
3. The method for designing an aluminum plastic film according to claim 1, wherein: the layers of the aluminum plastic film are bonded through an adhesive, and the adhesive is polyurethane or acrylic glue.
4. The method for designing an aluminum plastic film according to claim 3, wherein: the aluminum foil layer is bonded with the protective layer through polyurethane glue, and the aluminum foil layer is bonded with the thermoplastic resin layer through acrylic glue.
5. An aluminum-plastic film, characterized in that the aluminum-plastic film comprises a thermoplastic resin layer, a protective layer and an aluminum foil layer arranged between the thermoplastic resin layer and the protective layer; the protective layer of the aluminum plastic film is at least one of a polyamide film and a polyester film; the thermoplastic resin layer of the aluminum plastic film is a polyolefin film; the aluminum plastic film meets the following conditions: s= (T A *D A +T B *D B *3）/（T C *D C * 2) S is less than or equal to a threshold S1, where T A 、T B 、T C Tensile strength, D, of polyamide film, polyester film, polyolefin film, respectively A 、D B 、D C The thickness of the polyamide film, the polyester film and the polyolefin film respectively; when the double-pit 126090 type battery deep stamping die is used for stamping, the value of the threshold S1 is 1.5; when the double-pit 802030 battery deep-drawing die is used for punching, the threshold value S1 is 1.67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110783356.7A CN113594593B (en) | 2021-07-12 | 2021-07-12 | Design method of aluminum plastic film and aluminum plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110783356.7A CN113594593B (en) | 2021-07-12 | 2021-07-12 | Design method of aluminum plastic film and aluminum plastic film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113594593A CN113594593A (en) | 2021-11-02 |
| CN113594593B true CN113594593B (en) | 2023-06-20 |
Family
ID=78246819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110783356.7A Active CN113594593B (en) | 2021-07-12 | 2021-07-12 | Design method of aluminum plastic film and aluminum plastic film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113594593B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114132041A (en) * | 2021-12-14 | 2022-03-04 | 江西明冠锂膜技术有限公司 | Aluminum plastic film with low surface friction coefficient and preparation method thereof |
| CN115742489B (en) * | 2022-12-15 | 2023-10-03 | 江西省盛纬材料有限公司 | Thermal aluminum-plastic composite film and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017209218A1 (en) * | 2016-05-31 | 2017-12-07 | 大日本印刷株式会社 | Battery packaging material, production method therefor, battery, and polyester film |
| KR20180020082A (en) * | 2016-08-17 | 2018-02-27 | 쇼와 덴코 패키징 가부시키가이샤 | Outer material and power storage device for power storage device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000353501A (en) * | 1999-06-11 | 2000-12-19 | Japan Storage Battery Co Ltd | Nonaqueous electrolyte secondary battery |
| CN205326411U (en) * | 2015-11-24 | 2016-06-22 | 广东东立新材料科技有限公司 | High tensile crowded protection film altogether of resistant punching press of color -coated sheet |
| WO2018026007A1 (en) * | 2016-08-05 | 2018-02-08 | 大日本印刷株式会社 | Battery packaging material and battery |
| US11450911B2 (en) * | 2018-02-07 | 2022-09-20 | Dai Nippon Printing Co., Ltd. | Battery packaging material, method for manufacturing the same, and battery |
-
2021
- 2021-07-12 CN CN202110783356.7A patent/CN113594593B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017209218A1 (en) * | 2016-05-31 | 2017-12-07 | 大日本印刷株式会社 | Battery packaging material, production method therefor, battery, and polyester film |
| CN109219898A (en) * | 2016-05-31 | 2019-01-15 | 大日本印刷株式会社 | Battery use packing material and its manufacturing method, battery and polyester film |
| KR20180020082A (en) * | 2016-08-17 | 2018-02-27 | 쇼와 덴코 패키징 가부시키가이샤 | Outer material and power storage device for power storage device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113594593A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113594593B (en) | Design method of aluminum plastic film and aluminum plastic film | |
| US20230290995A1 (en) | Packaging material for battery | |
| KR101494589B1 (en) | Packaging material for cell | |
| CN110001149B (en) | Packaging material for battery | |
| CN107078236B (en) | Packaging material for battery | |
| JP7298765B2 (en) | Battery packaging material, manufacturing method thereof, battery, and polyester film | |
| CN106233492B (en) | Packaging material for electricity storage device and electricity storage device using same | |
| US20140193702A1 (en) | Housing for a Galvanic Element | |
| TWI662733B (en) | Exterior material for power storage device and power storage device | |
| CN106328834B (en) | Outer packaging material for electricity storage device and electricity storage device | |
| JPWO2011132545A1 (en) | Battery or capacitor outer packaging material and method for manufacturing the same | |
| US11038242B2 (en) | Electrode assembly and method for manufacturing the same | |
| JP7314970B2 (en) | BATTERY PACKAGING MATERIAL, MANUFACTURING METHOD THEREOF, AND BATTERY | |
| US20170149025A1 (en) | Packaging material for batteries | |
| US10347876B2 (en) | Packaging material for batteries, method for producing same, and battery | |
| CN106848111B (en) | Stack film and manufacturing method thereof | |
| JP2016177873A (en) | Packaging material for battery | |
| WO2017179267A1 (en) | Outer package material for electricity storage devices, and electricity storage device | |
| CN215070158U (en) | Multi-aluminum-layer high-punching-depth aluminum-plastic film and lithium battery | |
| KR20230065809A (en) | Packing material for secondary batteries | |
| KR20220072630A (en) | Pouch film for secondary battery and method for manufacturing the same | |
| US11011789B2 (en) | Package sealing structure, preparation method thereof and flexible packaging battery | |
| CN216015517U (en) | High-performance aluminum plastic film | |
| CN216161901U (en) | Lithium battery tab and lithium battery | |
| KR20200069600A (en) | Laminate Sheet for Battery Case Having Thickness Variation and Pouch-type Battery Case Manufactured Using the Same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240119 Address after: 310000, Building 14, 201, No. 8 Foster Street, Jinbei Street, Lin'an District, Hangzhou City, Zhejiang Province (self declared) Patentee after: Hangzhou Foster Functional Membrane Materials Co.,Ltd. Address before: 215555 Xinzhuang Industrial Park, Changshu City, Suzhou City, Jiangsu Province Patentee before: SUZHOU FIRST PV MATERIAL CO.,LTD. |
|
| TR01 | Transfer of patent right |