CN110815837A - Apparatus for manufacturing aluminum soft package film for small secondary battery and soft package film manufactured thereby - Google Patents
Apparatus for manufacturing aluminum soft package film for small secondary battery and soft package film manufactured thereby Download PDFInfo
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- CN110815837A CN110815837A CN201811074854.9A CN201811074854A CN110815837A CN 110815837 A CN110815837 A CN 110815837A CN 201811074854 A CN201811074854 A CN 201811074854A CN 110815837 A CN110815837 A CN 110815837A
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- film
- coating device
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- secondary battery
- adhesive
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 62
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 61
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000007756 gravure coating Methods 0.000 claims abstract description 48
- 238000000576 coating method Methods 0.000 claims abstract description 44
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 239000000853 adhesive Substances 0.000 claims abstract description 33
- 230000001070 adhesive effect Effects 0.000 claims abstract description 33
- 238000010030 laminating Methods 0.000 claims abstract description 17
- 239000012756 surface treatment agent Substances 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims abstract 3
- 239000011888 foil Substances 0.000 claims description 43
- 239000010410 layer Substances 0.000 claims description 33
- 229920006280 packaging film Polymers 0.000 claims description 28
- 239000012785 packaging film Substances 0.000 claims description 28
- 239000012790 adhesive layer Substances 0.000 claims description 23
- 238000007764 slot die coating Methods 0.000 claims description 21
- 239000002335 surface treatment layer Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 claims description 13
- 239000005025 cast polypropylene Substances 0.000 claims description 8
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920006284 nylon film Polymers 0.000 claims description 7
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 3
- 239000005001 laminate film Substances 0.000 claims 3
- 239000011230 binding agent Substances 0.000 abstract description 3
- 238000007607 die coating method Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 92
- 238000000034 method Methods 0.000 description 15
- 239000000126 substance Substances 0.000 description 12
- 239000003792 electrolyte Substances 0.000 description 6
- 238000003475 lamination Methods 0.000 description 6
- 238000009820 dry lamination Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 4
- 238000009459 flexible packaging Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- 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
- H01M10/04—Construction or manufacture in general
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings 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
- 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
- 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
- H01M50/117—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
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/10—Batteries
-
- 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)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention relates to an apparatus for manufacturing an aluminum soft package film for a small-sized secondary battery and a soft package film manufactured thereby, which can selectively use a coating method suitable for the characteristics of a surface treatment agent, a binder and a film in one manufacturing facility. The small-size secondary cell is with soft packet of film manufacturing installation of aluminium includes: a first uncoiler for uncoiling and supplying a first film to be coiled; an application section that applies a surface treatment agent or an adhesive to the first film; a dryer that dries the first film coated with the adhesive; a second uncoiler for uncoiling and supplying the coiled second film; a laminating part for laminating the first film and the second film; and a winding machine for winding the pressed film, wherein the coating part comprises a micro gravure coating device, a direct gravure coating device and a groove die coating device, and the micro gravure coating device, the direct gravure coating device and the groove die coating device are arranged to be capable of moving longitudinally on one side surface of the film manufacturing device.
Description
Technical Field
The present invention relates to an Apparatus for Manufacturing a soft packaging Film for a Small secondary battery and a soft packaging Film manufactured thereby (Manufacturing Apparatus of aluminum Pouch Film for Small Size secondary battery and a Pouch Film Thereof), and more particularly, to an Apparatus for Manufacturing an aluminum soft packaging Film for a Small secondary battery and a soft packaging Film manufactured thereby, which can minimize an installation area of a soft packaging Film Manufacturing Apparatus and can improve quality of the soft packaging Film by selectively using an applicator suitable for a Film Manufacturing process by performing all of micro gravure coating (micro gravure coating), Direct gravure coating (Direct gravure coating), and Slot die coating (Slot die coating) operations in one Film Manufacturing Apparatus.
Background
In general, a secondary Battery is a Rechargeable Battery (Rechargeable Battery) that can be recharged differently from a primary Battery that is discarded after being used once.
The types of such secondary batteries include lead storage batteries, nickel-cadmium batteries, nickel-metal hydride storage batteries, lithium ion polymer batteries, and the like.
The above-mentioned secondary battery is widely used in digital cameras, mobile phones, notebook computers, electric vehicles, and the like.
Among them, lithium secondary batteries are lightweight and have high energy density and discharge voltage, and therefore are used in various fields such as electric vehicles.
Such a lithium secondary battery may be classified into a Pouch (Pouch) shape, a cylindrical shape, a square shape, and the like, according to its outer shape.
Among them, since the pouch-type secondary battery uses a pouch film in which a polymer film is laminated on both surfaces of an aluminum Foil (aluminum Foil) as an exterior material, the weight of the pouch-type secondary battery can be made significantly lower than that of a cylindrical or rectangular secondary battery using a metal can as an exterior material of the battery.
Also, the pouch-type secondary battery has an advantage in that IT can be manufactured in various shapes, and thus is widely used in portable IT devices.
Fig. 1 shows an example of a pouch-type lithium secondary battery.
As shown in fig. 1, a typical Pouch-type secondary battery includes a Pouch Film (Pouch Film)10, an Anode plate (Anode)20, an electrolyte (Polymer Electrode)30, and a cathode plate (Cathod)40 housed therein, and has an Anode terminal (Anode Tap)50 and a cathode terminal (Cathod Tap) 60 at one end.
The flexible packaging film 10 is manufactured as a multilayer structure film, and is formed into a rectangular battery housing space by a press machine.
Next, an electrode body including a cathode and an anode and a battery cell having an electrode terminal are placed in the housing space, an electrolyte is injected, and then the peripheral portion is sealed, thereby completing the manufacture of the pouch-type secondary battery.
Therefore, the pouch film for a secondary battery is required to have excellent moldability during press working, should not cause pin holes (Pinhole) during working, and excellent chemical resistance to withstand an electrolytic solution.
Further, it is necessary to prevent the internal electrolyte from flowing to the outside, and to prevent the moisture from entering from the outside.
Further, it is required to have insulation for preventing short circuit of the battery, and to be able to maintain sufficient mechanical strength in the use environment (-20 to 100 ℃).
Such pouch films for secondary batteries are classified into pouch films for small-sized secondary batteries (for example, batteries having a thickness of 113 μm) used in portable IT devices and the like and pouch films for medium-sized and large-sized secondary batteries (for example, batteries having a thickness of 153 μm) used in electric vehicles and the like.
On the other hand, methods for laminating a soft packaging film having a multilayer structure include a dry Lamination (DryLamination) method and an Extrusion Lamination (Extrusion Lamination) method.
The dry lamination method is a method in which the first film is coated with an adhesive, passed through a dryer, and then laminated with the second film.
The dry lamination method has the following advantages: the coating can be uniformly and thinly applied, the thickness of the soft packaging film can be reduced, the process is simple, and the productivity can be improved.
However, the dry lamination method has disadvantages of lower chemical resistance and adhesive strength than the extrusion lamination method.
The extrusion lamination is a method in which a molten Resin (Resin) is supplied through a die to press two films by thermal fusion.
The extrusion lamination method has advantages of ensuring electrolyte resistance and excellent adhesion.
However, since it is difficult to uniformly apply the molten resin, there is a disadvantage that it is difficult to make the thin film thin.
However, according to the conventional production method of the soft packaging film, there is a problem that various coating methods suitable for the properties of the treatment agent, the adhesive and the film cannot be applied to one production facility.
Therefore, in order to apply various coating methods, it is necessary to provide a plurality of manufacturing facilities, and therefore, there is a problem that the facility manufacturing cost increases and a wide installation area is required.
Documents of the prior art
Patent document
Korean laid-open patent publication No. 10-2014-0077182
Korean laid-open patent publication No. 10-2014-0082791
Korean laid-open patent publication No. 10-2013-0016563
Disclosure of Invention
Problems to be solved
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a soft packaging film manufacturing apparatus capable of selectively applying a coating method suitable for the characteristics of a surface treatment agent, an adhesive and a film in one manufacturing facility when manufacturing a soft packaging film for a small-sized secondary battery.
Another object of the present invention is to improve physical properties, particularly moldability and chemical resistance, of a soft packaging film by applying a coating method suitable for characteristics of a surface treatment agent, an adhesive and a film in one manufacturing apparatus.
Still another object of the present invention is to enable various coating works to be performed in one manufacturing apparatus, thereby saving the manufacturing cost of the soft packing film manufacturing apparatus and minimizing the installation area of the apparatus.
Means for solving the problems
In order to achieve the above object, the present invention provides an apparatus for manufacturing an aluminum soft package film for a small-sized secondary battery, comprising: a first uncoiler that uncoils and supplies a first wound film; an application section that applies an adhesive to the first film; a dryer that dries the first film coated with the adhesive; a second uncoiler that uncoils and supplies the coiled second film; a laminating part for laminating the first film and the second film; and a winder for winding the pressed film, wherein the coating section is composed of a micro gravure coating device, a direct gravure coating device, and a slot die coating device, and the micro gravure coating device, the direct gravure coating device, and the slot die coating device are provided so as to be longitudinally movable on one side surface of the film manufacturing apparatus.
Further, the micro gravure coating device, the direct gravure coating device, and the slot die coating device are configured to be placed on a pair of rails provided at the bottom and to be moved in the longitudinal direction, and a desired coating device can be selectively used according to the film manufacturing process.
The micro gravure coater is used for coating the surface treatment agent on the aluminum foil paper.
The direct gravure coater is used for applying a first adhesive to bond one surface of the aluminum foil paper and a protective film as a first film.
The present invention is characterized in that the groove die coating device is used when a second adhesive is applied to press the other surface of the aluminum foil paper and a sealing layer as a second film.
The secondary battery soft package film is characterized in that the protective film is laminated after a first surface treatment layer and a first adhesive layer are formed on one surface of the aluminum foil, and the sealing layer is laminated after a second surface treatment layer and a second adhesive layer are formed on the other surface of the aluminum foil.
The protective Film is made of a Nylon Film (Nylon Film), the first surface treatment layer and the second surface treatment layer are made of Trivalent Chromate (Trivalent Chromate), the first adhesive layer is made of Polyurethane-based adhesive, the second adhesive layer is made of Polyolefin-based adhesive, and the sealant layer is made of Cast Polypropylene (Cast Polypropylene).
Effects of the invention
According to the present invention, it is possible to selectively apply a coating method suitable for the characteristics of the surface treatment agent, the adhesive, and the film to one manufacturing apparatus.
Further, since a coating method suitable for the characteristics of the surface treatment agent, the binder, and the film can be applied to one manufacturing apparatus, the physical properties of the flexible packaging film, particularly, moldability and chemical resistance to an electrolyte solution can be improved at the same time, and thus a high-quality flexible packaging film can be manufactured.
Further, since the pouch film for a secondary battery can be manufactured by various coating methods in one manufacturing apparatus, there is an effect of saving the manufacturing cost of the film manufacturing apparatus and minimizing the installation space.
Further, since the entire process of manufacturing the soft packaging film is performed in one manufacturing line, the number of working steps can be reduced, and productivity can be improved.
Drawings
Fig. 1 is a schematic view of a general pouch-type secondary battery.
Fig. 2 is a schematic view of a pouch film for a secondary battery according to the present invention.
Fig. 3 is a view showing a process of manufacturing the pouch film for a secondary battery of the present invention.
Fig. 4 is a front view of the soft packing film manufacturing apparatus of the present invention.
Fig. 5 is a partial plan view of the soft packing film manufacturing apparatus of the present invention.
Fig. 6 is a schematic view of a micro gravure coating apparatus.
Fig. 7 is a schematic view of a direct gravure coating apparatus.
Fig. 8 is a schematic diagram of a slot die coating apparatus.
Reference numerals:
10: soft packaging Film (Pouch Film)
11: aluminum Foil paper (aluminum Foil)
12: a first surface treatment layer
13: first adhesive layer
14: protective film
15: second surface treatment layer
16: second adhesive layer
17: sealing (sealing) layer
100: soft package film manufacturing device
110: first uncoiler (Unwindder)
120: pretreatment unit
130: cleaning part
140: coating section
140 a: micro Gravure (Micro Gravure) coating device
140 b: direct Gravure (Direct Gravure) coating apparatus
140 c: slot Die coating device
140 d: rail (Rail)
150: drying machine (Dryer)
160: second uncoiler
170: laminating section
190: winding machine (Winder)
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 4, the apparatus for manufacturing a pouch film for a small-sized secondary battery according to the present invention is an apparatus 100 for manufacturing an aluminum pouch film for a secondary battery, comprising: the apparatus 100 for manufacturing an aluminum soft pack film for a secondary battery includes a first Unwinder 110 for unwinding and supplying a wound first film F1, a coating unit 140 for coating a surface treatment agent or an adhesive on the first film F1, a Dryer 150 for drying the first film F1 coated with the adhesive, a second Unwinder 160 for unwinding and supplying a wound second film F2, a Lamination unit 170 for laminating the first film F1 and the second film F2, and a Winder 190 for winding the laminated film, wherein the coating unit 140 is composed of a Micro Gravure coating device 140a, a Direct Gravure coating device 140b, and a Slot Die coating device 140 c.
Further, a pretreatment unit 120 and a cleaning unit 130 may be provided between the first unwinder 110 and the coating unit 140.
The micro gravure coating device 140a, the direct gravure coating device 140b, and the slot die coating device 140c are configured to be movable in the longitudinal direction on one side of the film manufacturing apparatus 100.
That is, as shown in fig. 5, the micro gravure coating device 140a, the direct gravure coating device 140b, and the slot die coating device 140c are each configured to be mounted on a pair of rails 140d provided at the bottom and to move longitudinally.
According to the above configuration, in one thin film manufacturing apparatus, a coating device suitable for the surface treatment agent, the adhesive, and the characteristics of the thin film can be selectively used.
As shown in fig. 6, the micro gravure coater 140a includes a Coating Roll R1, two Tension rolls R2, and a Blade (Blade) B, which are immersed in a Coating Pan (Pan) P, and the Coating Roll R1 and the Tension Roll R2 rotate in the same direction to apply the Coating material loaded on the Coating Pan P to the film F.
The micro gravure coater 140a employs a Reverse Roll method to reduce the radius of the coating Roll R1, thereby minimizing the contact Angle (Wrap Angle) between the film and the coating Roll.
According to the micro gravure coating device 140a, there is an advantage that the coagulation phenomenon of the coating material does not occur and the uniform thin film coating can be realized. Also, the present invention has an advantage that it can be easily applied to Roll-to-Roll (Roll to Roll) equipment.
Therefore, it is preferable to selectively use the above-described micro gravure coating device 140a when the aluminum foil 11 is coated with the surface treatment agent.
As shown in fig. 7, the direct gravure Coating device 140B includes a Coating Roll (Coating Roll) R1, a Back-up Roll (Back-up Roll) R3, and a Blade (Blade) B.
In the direct gravure coating device 140b, the coating roll R1 and the backup roll R3 rotate in mesh with each other, and a coating material is applied to one surface of the film F passing through the middle thereof.
The direct gravure coating apparatus 140b is suitable for processes requiring high precision, and is advantageous in that it can realize high-speed coating, and is therefore suitable for mass production.
Therefore, it is preferable to use the direct gravure coating apparatus 140b when applying the first adhesive for laminating the aluminum foil 11 and the protective film 14 after applying the surface treatment agent to one surface of the aluminum foil 11.
As shown in fig. 8, the Slot Die coating apparatus 140c includes a Slot Die (Slot Die) D for supplying the coating material, a Vacuum Chamber (Vacuum Chamber) V provided below the Slot Die D, and a rotating roller R4.
That is, the coating material is applied to the surface of the film F through the groove of the groove die D while rotating the rotating roll R4.
The slot die coating apparatus 140c has advantages of fast coating speed, high precision, and easy adjustment of coating thickness.
Therefore, it is preferable that the above-mentioned slot die coating apparatus 140c is used when coating the second adhesive for laminating the other surface of the aluminum-foil paper 11 and the second film forming the sealing layer (seallayer) 17 after laminating the protective film 14 on one surface of the aluminum-foil paper 11.
This is because the press-fit state of the aluminum foil 11 forming the Barrier layer (Barrier) and the sealing layer 17 plays an important role in the quality of the soft packaging film.
On the other hand, in the pouch film 10 for a small secondary battery according to the present invention, as shown in fig. 2, the barrier layer (Barrierlayer) is made of aluminum Foil (aluminum Foil) 11. Thus, the mechanical strength of the soft packing film can be improved.
After a first surface treatment layer 12 and a first adhesive layer 13 are formed on one surface of the aluminum foil 11, a protective film 14 is laminated.
Among them, the protective Film 14 is preferably made of a Nylon Film (Nylon Film).
The nylon film can ensure formability during punching of the soft packaging film, prevent external impact, and prolong the service life of the soft packaging film.
A second surface treatment layer 15 and a second adhesive layer 16 are formed on the other surface of the aluminum foil 11, and then a sealing layer 17 is formed.
Preferably, the first surface treatment layer 12 and the second surface treatment layer 15 are formed of trivalent chromate (TrivalentChromate).
The first surface-treated layer 12 and the second surface-treated layer 15 made of trivalent chromate can improve the adhesion to the first pressure-sensitive adhesive layer 13 and the second pressure-sensitive adhesive layer 16.
Also, the first adhesive layer 13 is preferably formed of a Polyurethane-based adhesive.
The polyurethane adhesive ensures the stretchability of the adhesive and prevents the occurrence of cracks (Crack) during the press molding of the flexible film.
In addition, it is preferable that the second adhesive layer 16 is formed of a Polyolefin-based (Polyolefin-based) adhesive, differently from the first adhesive layer 13.
The polyolefin-based adhesive can maintain stable adhesion strength between the aluminum foil 11 as the metal layer and the sealing layer 17, and can ensure chemical resistance against the electrolyte.
Among them, it is preferable that the above sealing layer 17 is composed of Cast Polypropylene (Cast Polypropylene).
The cast polypropylene can ensure Slip (Slip) properties for press molding, improve insulation properties, and improve heat fusion properties when sealing a soft package film.
Next, a process of manufacturing a pouch film for a small-sized secondary battery using the manufacturing apparatus of the present invention will be described with reference to fig. 3 and 4.
First, as shown in fig. 3 (a), a first surface treatment layer 12 is formed on one surface of an aluminum foil sheet 11.
When the first surface-treated layer 12 is formed on the aluminum foil sheet 11, the micro gravure coating device 140a is positioned on one side of the film production apparatus 100 (see fig. 5), and the aluminum foil sheet 11 wound around the first unwinder 110 is unwound and supplied.
Next, in the above-described micro gravure coating apparatus 140a, the first surface treatment layer 12 is formed on one surface of the aluminum foil paper 11 by using Trivalent Chromate (Trivalent Chromate).
Next, the aluminum foil 11 having the first surface treatment layer 12 formed on one side thereof is positioned at the first unwinder 110.
Thereafter, the micro gravure coating device 140a is moved in the longitudinal direction along the rail 140d, and the direct gravure coating device 140b is positioned on the side of the film manufacturing apparatus 100 (see fig. 5).
Next, the aluminum foil 11 having the first surface-treated layer 12 formed on one surface thereof is supplied from the first unwinder 110 to the direct gravure coating apparatus 140b, and as shown in fig. 3 (b), the first adhesive layer 13 is formed on the first surface-treated layer 12.
In this case, the first pressure-sensitive adhesive layer 13 is formed by using a Polyurethane-based (Polyurethane-based) pressure-sensitive adhesive in the direct gravure coater 140 b.
On the other hand, fig. 3 shows an example in which the first surface-treated layer 12 is formed on one surface of the aluminum foil 11 and then the first adhesive layer 13 is formed, but the first surface-treated layer 12 may be formed on one surface of the aluminum foil 11, the second surface-treated layer 15 may be formed on the other surface, and then the first adhesive layer 13 may be formed on the first surface-treated layer 12.
That is, the first adhesive layer 13 may be formed on one side after both sides of the aluminum foil paper 11 are surface-treated.
Next, the aluminum-foil sheet 11 on which the first adhesive layer 13 is formed is passed through the dryer 150 and then supplied to the laminating section 170.
At the same time, the protective film 14 (nylon film) as the first film is supplied from the second unwinder 160 to the laminating portion 170, and as shown in fig. 3 (c), the aluminum foil 11 and the protective film 14 are subjected to one-time press-fitting.
The film thus laminated at one time is subjected to an aging process after being wound around the winding machine 190.
Next, the roll on which the once-laminated film is wound is positioned at the first unwinder 110 again.
At this time, the direct gravure coating device 140b is moved in the longitudinal direction along the rail 140d, and the micro gravure coating device 140a is again positioned on the side of the film manufacturing apparatus 100 (see fig. 5).
Next, the primarily pressed film is supplied from the first unwinder 110 to the micro gravure coating device 140a, and as shown in fig. 3 (d), the second surface treatment layer 15 is formed on the other surface of the aluminum foil 11 by using trivalent chromate.
Next, the aluminum foil 11 having the second surface-treated layer 15 formed on the other surface thereof is positioned again at the first unwinder 110.
Next, the micro gravure coating device 140a is moved in the longitudinal direction along the rail 140d, and the slot die coating device 140c is positioned on one side of the film manufacturing apparatus 100 (see fig. 5).
Next, the aluminum foil 11 having the second surface-treated layer 15 formed on the other surface thereof is supplied from the first unwinder 110 to the slot die coating apparatus 140c, and as shown in fig. 3 (e), the second adhesive layer 16 is formed on the second surface-treated layer 15 formed on the other surface of the aluminum foil 11.
At this time, in the slot die coating apparatus 140c, the second adhesive layer 16 is formed using a Polyolefin-based adhesive.
Next, the aluminum foil 11 on which the second adhesive layer 16 is formed is passed through the dryer 150 and then supplied to the laminating section 170.
Meanwhile, cast polypropylene (castplopypylene) as a second film is supplied from the second unwinder 160 to the laminating section 170, as shown in (f) of fig. 3, so that the aluminum foil 11 as a barrier layer and the cast polypropylene as a sealing layer are subjected to secondary press-fitting.
In this way, the film subjected to the secondary pressing is wound around the winding machine 190, and then subjected to the aging process, thereby completing the manufacture of the aluminum soft packing film.
The soft packaging film thus produced was evaluated for physical properties such as adhesive strength, tensile strength, chemical resistance, moldability, and heat-sealing property.
In addition, the secondary battery is manufactured by molding the battery with a press machine, wrapping the battery, and sealing the battery.
The inventors of the present invention compared moldability and chemical resistance of the pouch film for a small-sized secondary battery having a total thickness of 113 μm manufactured according to the present invention with those of the existing small-sized pouch film manufactured by applying only the direct gravure coating method.
For the experiment of moldability, a 14X 17cm film sheet was molded with a mold having a size of 4X 5cm, and the depth at which no Crack (Crack) occurred was measured.
For chemical resistance experiments, the pouch film was soaked in the electrolyte used in the cell (EC: DEC: DMC ═ 1:1:1, LiPF)61M), the adhesion strength between the aluminum foil paper and the sealing layer was measured at 85 c for a period of seven days.
The following [ Table 1] shows the experimental results.
TABLE 1 moldability and chemical resistance of a flexible packaging film for a small secondary battery having a total thickness of 113 μm
As can be seen from table 1, the soft packaging film of the present invention, which is manufactured by selectively applying the micro gravure coating method, the direct gravure coating method, and the slot die coating method according to the surface treatment agent, the binder, and the film, is more excellent in moldability and chemical resistance against the electrolyte solution than the conventional soft packaging film manufactured by applying only the direct gravure coating method.
In particular, it can be seen that the chemical resistance of the soft packaging film of the present invention is greatly improved compared to the soft packaging film manufactured by the conventional method.
That is, the micro gravure coater, the direct gravure coater, and the slot die coater are provided in one manufacturing facility, and a coating method suitable for the surface treatment agent, the adhesive, and the film is applied, thereby improving the moldability and chemical resistance that determine the quality of the soft packaging film.
The preferred embodiments of the present invention have been described above by way of example, and the scope of the present invention is not limited to the specific embodiments described above. Those skilled in the art can make various changes and modifications without departing from the scope of the technical idea of the present invention.
Claims (8)
1. A small-size secondary cell is with soft packet of film manufacturing installation of aluminium, this small-size secondary cell is with soft packet of film manufacturing installation of aluminium includes: a first uncoiler (110) that uncoils and supplies a first wound film (F1); an application unit (140) that applies a surface treatment agent or an adhesive to the first film (F1); a dryer (150) that dries the adhesive-coated first film (F1); a second uncoiler (160) that uncoils and supplies a coiled second film (F2); a laminating part (170) for laminating the first film (F1) and the second film (F2); and a winder (190) for winding the pressed film, wherein the apparatus for manufacturing an aluminum soft package film for a small-sized secondary battery is characterized in that,
the coating section (140) is composed of a micro gravure coating device (140a), a direct gravure coating device (140b), and a slot die coating device (140c),
the micro gravure coating device (140a), the direct gravure coating device (140b), and the slot die coating device (140c) are provided so as to be capable of moving in the longitudinal direction on one side of the film manufacturing apparatus (100).
2. The apparatus for manufacturing an aluminum pouch film for a small-sized secondary battery according to claim 1, wherein the aluminum pouch film is a film made of a material having a high hardness,
the micro gravure coating device (140a), the direct gravure coating device (140b), and the slot die coating device (140c) are configured to be mounted on a pair of rails (140d) provided at the bottom and move in the longitudinal direction, and a desired coating device can be selectively used according to the film manufacturing process.
3. The apparatus for manufacturing an aluminum pouch film for a small-sized secondary battery according to claim 2, wherein the micro gravure coating device (140a) is used when the surface treatment agent is coated on the aluminum foil (11).
4. The apparatus for manufacturing an aluminum pouch film for a small-sized secondary battery according to claim 2, wherein the direct gravure coater (140b) is used when the first adhesive is coated to press-bond one surface of the aluminum foil (11) and the protective film (14) as the first film.
5. The apparatus for manufacturing an aluminum soft pack film for a small secondary battery according to claim 2, wherein the slot die coating apparatus (140c) is used when coating the second adhesive for laminating the other surface of the aluminum foil (11) and the sealing layer (17) as the second film.
6. An aluminum laminate film for a small secondary battery, characterized in that it is manufactured by the manufacturing apparatus according to any one of claims 1 to 5.
7. The aluminum laminate film for a small secondary battery according to claim 6,
the soft packaging film (10) for secondary batteries is formed by forming a first surface treatment layer (12) and a first adhesive layer (13) on one surface of an aluminum foil (11), then pressing a protective film (14), and forming a second surface treatment layer (15) and a second adhesive layer (16) on the other surface of the aluminum foil (11), and then pressing a sealing layer (17).
8. The aluminum laminate film for a small secondary battery according to claim 7,
the protective film (14) is made of a nylon film,
the first surface treatment layer (12) and the second surface treatment layer (15) are formed of a trivalent chromate,
the first adhesive layer (13) is formed of a polyurethane adhesive,
the second adhesive layer (16) is formed of a polyolefin adhesive,
the sealing layer (17) is made of cast polypropylene.
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| KR1020180092356A KR102109550B1 (en) | 2018-08-08 | 2018-08-08 | Manufacturing Apparatus of Aluminium Pouch Film for Small Size Secondary Battery and Pouch Film Thereof |
| KR10-2018-0092356 | 2018-08-08 |
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| KR102493563B1 (en) * | 2020-10-12 | 2023-01-31 | 주식회사 탑앤씨 | Manufacturing method of pouch film for secondary battery of lithium ion |
| KR102365376B1 (en) * | 2021-06-21 | 2022-02-21 | 고윤동 | Manufacturing method of pouch film applying aluminum laminate layer |
| KR102547053B1 (en) * | 2021-10-14 | 2023-06-23 | 율촌화학 주식회사 | Cell pouch coating apparatus and metho of using the same |
| KR102585007B1 (en) | 2022-01-24 | 2023-10-10 | 김찬식 | Multilayer film for cell pouch of secondary battery and producing method thereof |
| KR102597007B1 (en) * | 2022-12-22 | 2023-11-02 | 율촌화학 주식회사 | Method of fabricating cell pouch |
| KR102676613B1 (en) * | 2023-12-12 | 2024-06-19 | 도호준 | Window film coating system and method |
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| CN110815837B (en) | 2021-09-07 |
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