WO2010062054A2 - 셀 포장재 및 그 제조방법 - Google Patents
셀 포장재 및 그 제조방법 Download PDFInfo
- Publication number
- WO2010062054A2 WO2010062054A2 PCT/KR2009/006408 KR2009006408W WO2010062054A2 WO 2010062054 A2 WO2010062054 A2 WO 2010062054A2 KR 2009006408 W KR2009006408 W KR 2009006408W WO 2010062054 A2 WO2010062054 A2 WO 2010062054A2
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- WIPO (PCT)
- Prior art keywords
- layer
- flame retardant
- packaging material
- cell
- sealant
- Prior art date
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- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
- OZEDYCTUPMFWEP-UHFFFAOYSA-N tris(2,4-dibromophenyl) phosphate Chemical compound BrC1=CC(Br)=CC=C1OP(=O)(OC=1C(=CC(Br)=CC=1)Br)OC1=CC=C(Br)C=C1Br OZEDYCTUPMFWEP-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910001868 water Inorganic materials 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
Classifications
-
- 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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
-
- 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
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
-
- 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
-
- 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
- H01M50/121—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
- 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
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/143—Fireproof; Explosion-proof
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/24—Organic non-macromolecular coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/746—Slipping, anti-blocking, low friction
-
- 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
-
- 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
- B32B2553/00—Packaging equipment or accessories not otherwise provided for
-
- 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
Definitions
- the present invention relates to a cell packaging material and a method for manufacturing the same, and more particularly, to a cell packaging material and a method for manufacturing the same, which have imparted flame retardancy to an external packaging material for a cell such as a lithium secondary battery or a portable storage battery.
- cells such as secondary batteries such as lithium ion batteries and lithium polymer batteries, and portable storage batteries, may suddenly increase their voltages due to internal short circuits, external short circuits, or overcharge and discharge. Can be.
- the cell may be electrically connected to safety devices such as positive temperature coefficient (PTC) devices, thermal fuses, and protection circuits.
- PTC positive temperature coefficient
- Such a safety device can prevent the battery from overheating by cutting off the current when the cell voltage or temperature rises sharply.
- the cell in order to protect the cell from external impact it can be manufactured in the form of a so-called inner pack battery that wraps the cell with an aluminum material or nickel-plated iron.
- the protection circuit can be designed to withstand impact.
- the inventors propose a method which can impart flame retardancy to a cell without increasing the volume of the cell itself or affecting the operation of the cell.
- the cell packaging material is composed of one or more layer structure, the flame retardant is included in one or more layers, a coating layer of the flame retardant is formed, or they are used in combination
- a cell packaging material and a method of manufacturing the same are provided.
- the cell itself does not include a flame retardant film or a flame retardant, it is possible to impart flame retardancy to the cell without increasing the volume of the cell or affecting the operation of the cell.
- the cell generally consists of a battery part including a positive electrode, a negative electrode, a separator, an electrolyte, and the like, and the outside of the battery part may be packaged by a packing material, which is called a cell packing material.
- a flame retardant may be included in at least one layer constituting a packaging material for outer packaging of the cell instead of a method of separately installing a flame retardant film in the battery unit itself of the cell or adding a flame retardant in an electrolyte.
- a coating layer of the flame retardant in at least one layer it is possible to impart flame retardance to the cell without affecting the volume or operation of the cell.
- a cell packaging material includes, for example, an outermost layer made of a synthetic resin, a barrier layer formed under the outermost layer, and a sealant layer that is an innermost layer formed under the barrier layer. It may include.
- An adhesive layer may be formed between the outermost layer and the barrier layer, and a melt extrusion resin layer may be further formed between the barrier layer and the sealant layer.
- a flame retardant may be contained in any one or more layers selected from the outermost layer, the barrier layer, the melt extrusion resin layer, and the sealant layer.
- the coating layer of the flame retardant may be formed on any one or more layers.
- the method of containing in the said layer and the method of forming the coating layer of a flame retardant can be used together.
- the method of containing the flame retardant may include not only a method of adding a flame retardant in the layer as an additive, but also chemically bonding the flame retardant component into the plastic resin structure when the layer includes a plastic resin.
- the flame retardant in the method of containing the flame retardant, it is advantageous in terms of flame retardancy to include the flame retardant in the melt-extruded resin layer and / or the sealant layer.
- the sealant layer or the melt-extruded resin layer is generally made of synthetic resin and present inside, it may be advantageous to include a flame retardant in these layers in terms of flame retardancy.
- a flame retardant when a flame retardant is contained in the layer, combustion from the battery side can be blocked.
- the outermost layer generally consists of synthetic resin and is at the outermost side.
- the flame retardant coating layer it may be to form a flame retardant coating composition and to apply it.
- the composition for coating a flame retardant may include a binder, a flame retardant, a slip agent, a solvent.
- the binder may be used to increase the adhesion of the coating layer of the flame retardant to the outermost layer.
- a copolymer such as an acrylic acid alkyl ester monomer and a functional group-containing monomer such as acrylic acid or a binder such as a urethane polymer can be used.
- an organic solvent such as ethylene alcohol (EA), toluene, methyl ethyl ketone (MEK), or the like can be used.
- EA ethylene alcohol
- MEK methyl ethyl ketone
- a general flame retardant can be used without being limited to a specific flame retardant. It may be advantageous to be compatible with the resins used in each resin layer such as the outermost layer, sealant layer, melt extrusion resin layer, and the like so as not to degrade the bonding property of the layer. In addition, it should not affect the mechanical properties of the final product, and it may be advantageous that the combustion and the generation of toxic gases is small.
- the flame retardant for example, organic flame retardants such as phosphorus, halogen, melamine and the like, and inorganic flame retardants such as aluminum hydroxide, antimony-based products and magnesium hydroxide can be used.
- the halogen-based flame retardant can generally exhibit a flame retardant effect by stabilizing radicals generated in the gas phase.
- halogen-based flame retardant tribromo phenoxyethane, tetra bromo bisphenol-A (TBBA), octabromo diphenyl ether (OBDPE), brominated epoxy, brominated polycarbonate oligomer, brominated benzyl alkyl ether, Brominated benzoic acid ester, brominated phthalate ester, chlorinated paraffin, chlorinated polyethylene, alicyclic chlorine flame retardant, etc. are mentioned.
- non-halogen-based flame retardants In consideration of environmental aspects, it may be advantageous to use non-halogen-based flame retardants.
- a flame retardant organic flame retardants, such as phosphorus and melamine series, and an inorganic flame retardant can be used.
- the phosphorus-based flame retardant is generally one that can produce a polymethic acid by pyrolysis, which can exert a flame retardant effect by blocking oxygen by a carbon film produced by forming a protective layer or by dehydration when polymethic acid is produced.
- phosphorus such as ammonium phosphate, ammonium polyphosphate, trioctyl phosphate, dimethyl methyl phosphate, dimethyl methyl phosphate, trimethyl propane methylphosphonic oligomer (trimethylolpropane methylphosphonic) oligome, penthaerythritol phosphate, cyclic neopentyl thio phosphoric anhydride, triphenyl phosphate, tricresyl phosphate, tert-butyl Tert-butylphenyl diphenyl phosphate, tetraphenyl mp-phenylene diphosphate, tris (2,4-dibromophenyl) phosphate ), N, N'-bis (2-hydroxyethyl) aminomethyl phosphonate (N, N'-bis (2-hydoxyethyl) aminometh yl phosphonate, pho
- Melamine can be used as a flame retardant in the form of a stable salt with most organic or inorganic acids. These melamine flame retardants are low smoke and biodegradable. As a non-limiting example of the said melamine type compound, melamine cyanurate etc. are mentioned.
- the inorganic compound flame retardant is decomposed by heat, releasing incombustible gas such as water, carbon dioxide, sulfur dioxide, hydrogen chloride and causing endothermic reaction, thereby diluting the combustible gas to prevent the access of oxygen, and cooling and pyrolysis products by endothermic reaction It is possible to reduce the formation of the flame retardant effect.
- Non-limiting examples of the inorganic compound flame retardant include aluminum hydroxide, magnesium hydroxide, antimony oxide, tin hydroxide, tin oxide, molybdenum oxide, zirconium compound, zinc stannate, guanidine-based compound, borate, calcium salt and the like.
- the coefficient of friction of the outermost layer may be increased, thereby deteriorating molding characteristics in the final product. Therefore, it may be advantageous to add a slip agent that can be mixed with the flame retardant and that does not affect the flame retardancy.
- the slippering agent is applied to the surface during or immediately after processing to prevent adhesion between the films and allow the film or sheet to slide well.
- the slip agent a general one can be used, and may include a polymer material for imparting slip properties, such as silicone, siloxane, silane, and wax system.
- a polymer material for imparting slip properties such as silicone, siloxane, silane, and wax system.
- non-limiting examples of the slip agent include fatty acid amides such as oleic acid amide and cuteka acid amide. The coating layer containing such a slip agent reduces the friction coefficient and lubricates.
- the slip agent it is also possible to replace the slip agent or to use an antiblocking agent together.
- the content of the anti-blocking agent may be used in the same amount as that of the slip agent.
- the total content of the antiblocking agent and the slip agent may be used in the same amount as the content of the slip agent alone.
- inorganic material particles such as silica, diatomaceous earth, kaolin and talc may be used. These particles can be contained in the coating layer to form a thin space between adjacent films to prevent adhesion between the films.
- composition for coating a flame retardant coating comprising a binder, a flame retardant, and a slip agent
- flame retardant, slip, transparency, and coating property to use 20 to 80 parts by weight of the flame retardant and 3 to 20 parts by weight of the slip agent based on 100 parts by weight of the binder. It may be advantageous from the side.
- the flame retardant 30 to 60 parts by weight and the slip agent 7 to 12 parts by weight may be more advantageous to use the flame retardant 30 to 60 parts by weight and the slip agent 7 to 12 parts by weight based on 100 parts by weight of the binder, and the flame retardant 50 to 60 parts by weight and the slip agent 10 to 12 parts by weight of the binder It may be most advantageous to use parts by weight.
- the solvent may include 300 to 2500 parts by weight with respect to the composition for the flame retardant coating composition 100 parts by weight of the binder, 20 to 80 parts by weight of the flame retardant and 3 to 20 parts by weight of the slip agent, the coating prepared accordingly It may be advantageous to have a solid content of 5 to 40% by weight of the composition for maintaining a constant coating thickness, coating temperature and coating rate.
- a polyester film having excellent electrolyte resistance is used alone, or a polyamide film capable of reinforcing moldability is used alone, or the polyester film is laminated with a polyamide film (up and down order of lamination). Can be used) and, as described later, a polyester film having both electrolyte resistance and moldability can be used.
- polyester film is excellent in electrolyte resistance
- usable polyester film resins include, for example, polyethylene terephthalate (PET), poly butylene terephthalate (PBT), and polyethylene naphthalate (Poly ethylene). at least one selected from the group consisting of naphthalate (PEN), poly butylene naphthalate (PBN), copolyester, polycarbonate (PC) and the like.
- the thickness of the film is generally set to 1.2 to 25 mu m, preferably 1.2 to 9.0 mu m.
- the polyamide film is intended to reinforce moldability, which is particularly required for pouches of the mold type.
- a biaxially stretched polyamide (Polyamides) film is used in consideration of the capacity and size of the battery.
- biaxially stretched polyamides film resin examples include nylon 6, nylon 6.6, copolymers of nylon 6 and nylon 6.6, nylon 6.10, polymethacrylylene amidamide (MXD 6), and the like. Use one or more selected from.
- the polyamide film has a thickness of 15 to 50 ⁇ m, preferably 15 to 25 ⁇ m.
- the polyester film and the polyamide film are laminated to each other and further through the adhesive of the polyamide film and its underlying layer.
- a polyurethane adhesive having excellent heat resistance and in particular, to use a urethane base two-component adhesive. Since the high temperature due to heat generation occurs when the battery is moved in the inner-packed cell, the heat-resistant property of the adhesive having weak heat resistance occurs because the separation between the polyester film and the polyamide film and between the polyamide film and the lower layer occurs. It is necessary to use a good adhesive.
- the heat resistance of the adhesive is measured by checking whether or not separation occurs after being put in a dry oven set to a constant temperature in a laminated state or in a commercialized state, after a predetermined time. In general, the heat resistance of the adhesive is used that does not occur layer separation after 5 seconds at 150 °C or 10 seconds at 260 °C.
- the flame retardant coating layer When the flame retardant coating layer is formed on the outermost layer may further include an outer surface corona layer. This outer corona layer can facilitate the formation and maintenance of the coating layer.
- the barrier layer is a layer for blocking moisture, gas, and the like, for example, using aluminum foil.
- the aluminum foil may contain iron, and in the case of containing iron, aluminum has good insulation and less pinholes due to bending as a lamination agent, and in particular, when forming an embossed exterior body, Formation can also be facilitated.
- iron content is less than 0.6% by weight, there is no effect of preventing the occurrence of pinholes, improving the embossing formability, and when the iron content is higher than 2.0% by weight, the flexibility as aluminum is impaired, and the encapsulant as the lamination agent. In molding, the workability becomes poor.
- the aluminum foil contains silicon, wherein when the silicon content is excessively increased to more than 0.9% by weight, the magnetic properties are improved, but workability that can be formed into an encapsulation becomes poor, and less than 0.05% by weight. If the content is reduced, the strength of the product is weakened and the elongation is lowered, resulting in poor processability to form a bag.
- the aluminum foil may contain silicon (Si) and iron (Fe), but in particular, in view of formability and workability, it may be advantageous that the silicon content is 0.05 to 0.9 wt%, and the iron content is preferably 0.6 to 2.0 wt%. Can be.
- the aluminum foil may be subjected to non-chromate treatment on one side or both sides of the aluminum foil to prevent corrosion and improve adhesive strength.
- non-chromate treatment an acid resistant film is formed by at least one compound selected from the group consisting of organic, inorganic and organic complexes such as titanium resin, zirconium and phosphate.
- the non-chromate treatment is to treat both sides of the aluminum foil can further increase the salt resistance.
- a polymer resin such as acrylic, phenol, epoxy, and fluorine resins.
- the outermost layer and the barrier layer may be bonded with an adhesive layer interposed therebetween.
- the adhesive may be a one-component type or a main body including a resin such as epoxy, phenol, melamine, polyimide, polyester, urethane (polyurethane), polyethylene terephthalate copolymer, polyetherurethane, or the like.
- a resin such as epoxy, phenol, melamine, polyimide, polyester, urethane (polyurethane), polyethylene terephthalate copolymer, polyetherurethane, or the like.
- a two-component adhesive composed of a curing agent may be used, and in particular, it may be advantageous to use a urethane-based adhesive having excellent heat resistance.
- an adhesive containing a flame retardant In order to increase the flame retardancy of the cell packaging material, it is conceivable to use an adhesive containing a flame retardant. However, when the flame retardant is added to the adhesive layer, the adhesiveness becomes weak when a certain amount is exceeded, so that interlayer peeling or whitening may occur during molding, and when the flame retardant is added, the amount is more than 0 wt% and 30 wt% or less. It is advantageous to use as.
- the sealant layer may be formed with a thickness of 5 to 120 ⁇ m, the melt extrusion resin layer may be further formed between the barrier layer and the sealant layer. For example, it can be laminated in the order of the barrier layer / melt extrusion resin layer / sealant layer.
- the melt extrusion resin layer serves to laminate the upper and lower layers by providing an adhesive force by coating the film by melt extrusion coating.
- the melt extrusion resin layer may be formed by, for example, melt extruding a polypropylene resin or polyethylene resin and coating a polypropylene resin or polyethylene resin film on the barrier layer and laminating the sealant layer.
- the coating thickness of the melt extrusion resin layer may be 10 ⁇ 80 ⁇ m, preferably 10 ⁇ 40 ⁇ m.
- a flame retardant may be added in the molten extruded resin layer to impart flame retardancy.
- the flame retardant content may be used in an amount of 0.1 to 30% by weight based on the melt extrusion resin. In applying the flame retardant, it may be advantageous to limit the content of the flame retardant to a level such that the adhesion required in the melt extrusion resin layer does not fall.
- the sealant layer uses a resin layer that can be sealed by heat in order to seal the packaging material by heat.
- the resin used may be advantageous to prevent cracking, whitening, pinholes, etc. of the heat sealing layer due to the slipperiness and heat sealing strength characteristics of the mold surface and the molding conditions during molding in the molding machine during molding. .
- the plastic film formed by adding at least one selected from the group consisting of ethylene, butadiene, ethylene propylene rubber, etc. to at least one selected from the group consisting of polyethylene, polypropylene, ethylene copolymer, propylene copolymer, etc. as a sealant layer Or modified polypropylene film.
- a terpolymer which is a three-component copolymer of ethylene, propylene, butadiene, or a homopropylene, ethylene copolymer, propylene copolymer or the like can be used.
- the melting temperature is low, and thus sealing is possible even when heat of 140 ° C. or less is applied.
- the innermost sealing surface of the sealant layer uses a terpolymer in consideration of the low melting temperature.
- the sealant layer is formed of two or more multilayer laminated structures, for example, three layers, the remaining layer portions except the sealing surface are used.
- other polymers such as homopropylene, propylene block copolymers in which propylene and ethylene are irregularly arranged, polypropylene random copolymers, and the like may be used.
- a flame retardant may be added in the sealant layer to impart flame retardancy.
- the addition amount of a flame retardant can be 0.1 to 20 weight% with respect to the sealant layer resin.
- the coating layer imparted flame retardancy is 90 parts by weight of a binder which is a copolymer of an acrylic acid alkyl ester monomer and an acrylic acid functional group-containing monomer, 10 parts by weight of a phosphorus flame retardant (dimethylmethyl phosphate), 1 part by weight of a slip agent (fatty acid amide), A flame retardant coating composition consisting of 800 parts by weight of toluene solvent was formed by coating on the outermost layer.
- the melt-extruded resin of the melt-extruded resin layer is made of polypropylene, the melt-extruded resin layer to which the flame retardant is added 10% by weight of phosphorus flame retardant (dimethylmethyl phosphate) compared to the polypropylene of the melt-extruded resin It was made by adding.
- the sealant layer was composed of a terpolymer of ethylene, propylene, butadiene, and the sealant layer to which the flame retardant was added was composed by adding a phosphorus flame retardant (dimethylmethyl phosphate) to 8 wt% of the terpolymer.
- a phosphorus flame retardant dimethylmethyl phosphate
- Flame retardant coating layer / outermost layer (nylon layer and PET layer) / adhesive layer / barrier layer (aluminum layer) / melt extrusion resin layer / sealant layer
- Flame retardant coating layer / outermost layer (nylon layer and PET layer) / adhesive layer / barrier layer (aluminum layer) / melt-extruded resin layer / sealant layer added flame retardant
- Flame retardant coating layer / outermost layer (nylon layer and PET layer) / adhesive layer / barrier layer (aluminum layer) / melt extrusion resin layer / sealant layer with flame retardant added
- Flame retardant coating layer / outermost layer (nylon layer and PET layer) / adhesive layer / barrier layer (aluminum layer) / melt-extruded resin layer added flame retardant / sealant layer added flame retardant
- Outermost layer (nylon layer and PET layer) / adhesive layer / barrier layer (aluminum layer) / melt extrusion resin layer / sealant layer
- the flame retardancy test was performed as follows.
- Example 1 forming the coating layer of the flame retardant or in Examples 5 and 6 in which the flame retardant was added to the sealant layer or the melt-extruded resin layer
- the flame retardancy was improved in comparison with the comparative example.
- the flame retardant was added to the sealant layer or the melt-extruded resin layer together with the coating layer of the flame retardant (Examples 2, 3, 4)
- the flame retardancy was further improved.
- the strength of the flame retardant was measured by varying the amount of the flame retardant added to the sealant layer of the pouch (in the case of the sealant layer, 8 wt% of the phosphorus flame retardant compared to the terpolymer) as shown in Table 2 below.
- the yarn strength test was performed as follows.
- a sample of a suitable size (about 150 mm wide and about 100 mm long) was prepared by folding the sealant layer.
- the finished sample was cut into a desired size (15 mm) using a cutter bar.
- the full scale of the tensile strength tester was set 20 to 50% higher than the expected heat seal strength of the sample, and then the thermal adhesive strength of the cut sample was measured.
- Thread Strength Unit kgf / 15mm
- the amount of flame retardant added to the melt extruded resin layer of the pouch (in the case of the melt-extruded resin layer, 10% by weight of phosphorus-based flame retardant compared to polypropylene) was prepared as shown in Table 3 below. A layer peel test was conducted.
- the layer peel test was performed as follows.
- a sample was prepared by cutting the prepared cell pouch in a width (15 mm) x length (150 mm) using a cutter bar.
- the film configuration was performed as in Experiment 1 above, but the mixing ratio of the three components except the solvent in the coating composition used for the coating layer formed on the outermost layer, that is, the binder, flame retardant and slip agent components was adjusted as shown in the following table.
- a 75 mm x 100 mm sample was placed on top of the sample at a specified position (marked by the line up to the point where the measurement line was not pulled), and then 200 g of the SLED was lightly placed on it (not impacted).
- Flame retardancy measurement The same flame retardancy measurement method as Experiment 1.
- Total light transmittance (Tt,%) combat light (T2) / incident light (T1) x 100
- T2 ⁇ (Diffuse Light by Device and Sample, T4)-[(Diffuser Light by Device, T3) x (Quantity of Incident Light, T1)] ⁇ / (Quantity of Incident Light, T1) x100
- the coating properties were measured as follows.
- a cotton swab was used by rolling cotton wool at the tip of a rod about 1 mm in diameter and about 10 cm in length.
- the configuration of the corona solution was composed of formamide and ethylene glycol monoethyl ether.
- Example 1 Slip Flame retardant Transparency Coating Example 1 x X O O O Example 2 ⁇ ⁇ O O Example 3 O ⁇ O O Example 4 O O O O O Example 5 O O ⁇ ⁇ Example 6 O O x x
- Examples 1 and 2 were relatively low in the slip and flame retardant items, and Examples 5 and 6 were relatively low in the transparency and coating properties.
- Examples 2, 3, 4 and 5 showed good or at least moderate results in slip, flame retardancy, transparency and coating properties.
- the present invention relates to a cell packaging material and a method for manufacturing the same, and more particularly, to a cell packaging material and a method for manufacturing the same, which have imparted flame retardancy to an external packaging material for a cell such as a lithium secondary battery or a portable storage battery.
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Laminated Bodies (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
Description
난연성 test | 시간(s) | |
실시예 1 | △ | 18 |
실시예 2 | O | 7 |
실시예 3 | O | 8 |
실시예 4 | O | 4 |
실시예 5 | △ | 18 |
실시예 6 | △ | 16 |
비교예 1 | X | 25 |
난연제 첨가량 | 0.1 중량% | 1 중량% | 5 중량% | 10 중량% | 20 중량% | 21 중량% |
실강도(*) | 5.5 | 5.5 | 5.0 | 5.0 | 3.2 | 2.4 |
난연제 첨가량 | 0.1 중량% | 1 중량% | 5 중량% | 10 중량% | 15 중량% | 30 중량% | 31 중량% |
최초 층박리 강도 | 1.2kgf | 1.2kgf | 1.2kgf | 1.2kgf | 1.2kgf | 1.2kgf | 1.2kgf |
1일 후 강도 | 1.2kgf | 1.0kgf | 1.0kgf | 1.0kgf | 0.83kgf | 0.56kgf | 0.4kgf |
배합 비율 (중량비)바인더 : 난연제 : 슬립제 | |
실시예 1 | 9 : 0.9 : 0.1 |
실시예 2 | 8 : 1.7 : 0.3 |
실시예 3 | 7 : 2.5 : 0.5 |
실시예 4 | 6 : 3.3 : 0.7 |
실시예 5 | 5 : 4 : 1 |
실시예 6 | 3 : 5 : 2 |
슬립성 | 난연성 | 투명성 | 코팅성 | |
실시예1 | x | X | O | O |
실시예2 | △ | △ | O | O |
실시예3 | O | △ | O | O |
실시예4 | O | O | O | O |
실시예5 | O | O | △ | △ |
실시예6 | O | O | x | x |
Claims (14)
- 셀의 포장재로서,상기 셀 포장재는 1층 이상의 층 구조로 이루어져 있으며,상기 1층 이상에 난연제가 포함되거나, 난연제 코팅층이 형성되거나, 또는 이들이 병용된 것을 특징으로 하는 셀 포장재.
- 제 1 항에 있어서,상기 포장재는 합성 수지로 이루어지는 최외층을 포함하고,상기 최외층 상에 난연제의 코팅층이 형성된 것을 특징으로 하는 셀 포장재.
- 제 1 항 또는 제 2 항에 있어서,상기 포장재는 최내층인 실란트층 및 상기 실란트층 상에 형성되는 용융압출수지층을 포함하고,상기 실란트층 또는 상기 용융압출수지층 중의 어느 하나 이상의 층에 난연제가 함유되는 것을 특징으로 하는 셀 포장재.
- 셀의 포장재로서,상기 포장재는 합성 수지로 이루어지는 최외층; 상기 최외층의 하부에 형성되는 배리어층; 및 상기 배리어층 하부에 형성되는 용융압출수지층; 상기 용융압출수지층 하부에 형성되는 실란트층;을 포함하는 것이고,상기 최외층, 배리어층, 용융압출수지층 또는 실란트층 중에서 선택되는 어느 하나 이상의 층에 난연제가 함유되거나, 또는 상기 어느 하나 이상의 층에 난연제 코팅층이 형성되거나, 또는 상기 어느 하나 이상의 층에 난연제가 함유되고 상기 어느 하나 이상의 층에 난연제의 코팅층이 형성된 것을 특징으로 하는 셀 포장재.
- 셀의 포장재로서,상기 포장재는 합성 수지로 이루어지는 최외층; 상기 최외층의 하부에 형성되는 배리어층; 및 상기 배리어층 하부에 형성되는 용융압출수지층; 상기 용융압출수지층 하부에 형성되는 실란트층;을 포함하는 것이고,상기 최외층 상에 난연제 코팅층이 형성되며,상기 실란트층 또는 상기 용융압출수지층 중의 어느 하나 이상의 층에 난연제가 함유되는 것을 특징으로 하는 셀 포장재.
- 제 4 항 또는 제 5 항에 있어서,상기 최외층과 상기 난연제 코팅층 사이에는 표면 코로나 층이 더 형성되는 것을 특징으로 하는 셀 포장재.
- 제 1 항, 제 2 항, 제 4 항 또는 제 5 항 중에서 선택되는 어느 한 항에 있어서,상기 난연제 코팅층은 난연제 코팅용 조성물로 이루어지는 것이고,상기 난연제 코팅용 조성물은 바인더 100 중량부에 대하여, 난연제 20~80 중량부 및 슬립제 3~20 중량부를 포함하는 것을 특징으로 하는 셀 포장재.
- 제 4 항 또는 제 5 항에 있어서,상기 최외층 및 상기 배리어층 사이에는 접착제층이 더 형성되며,상기 접착제층에 난연제가 접착제층 수지에 대하여 0중량% 초과 30중량% 이하로 함유되는 것을 특징으로 하는 셀 포장재.
- 제 4 항 또는 제 5 항에 있어서,상기 실란트층에는 난연제가 실란트층 수지에 대하여 0.1~20 중량%로 사용되는 것을 특징으로 하는 셀 포장재.
- 제 9 항에 있어서,상기 실란트층에는 에틸렌, 프로필렌, 부타디엔의 터폴리머가 포함되는 것을 특징으로 하는 셀 포장재.
- 제 4 항 또는 제 5 항에 있어서,상기 용융압출수지층에는 난연제가 용융압출수지층 수지에 대하여 0.1~30 중량%로 사용되는 것을 특징으로 하는 셀 포장재.
- 제 1 항, 제 2 항, 제 4 항 또는 제 5 항 중에서 선택되는 어느 한 항에 있어서,상기 난연제로서 할로겐계 난연제, 인계 난연제, 멜라민계 난연제 또는 무기 난연제 중에서 선택되는 하나 이상의 난연제를 사용하는 것을 특징으로 하는 셀 포장재.
- 셀 포장재의 제조 방법으로서,상기 셀 포장재를 구성하는 1층 이상의 층에 난연제를 함유시키거나, 난연제의 코팅층을 형성하거나, 또는 이들을 모두 수행하는 것을 특징으로 하는 셀 포장재의 제조 방법.
- 제 13 항에 있어서,상기 방법은 합성 수지로 이루어지는 최외층 상에 난연제의 코팅층을 형성하는 단계; 및최내층인 실란트층 또는 상기 실란트 층 상의 용융압출수지층 중 하나 이상의 층에 난연제를 함유시키는 단계;를 포함하는 것을 특징으로 하는 셀 포장재의 제조 방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2011534400A JP5437387B2 (ja) | 2008-11-03 | 2009-11-03 | セル用包装材及びその製造方法 |
CN200980143900.9A CN102202883B (zh) | 2008-11-03 | 2009-11-03 | 电池封装及其制造方法 |
US13/127,109 US20110212361A1 (en) | 2008-11-03 | 2009-11-03 | Cell packaging material and method for producing the same |
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KR10-2008-0108597 | 2008-11-03 | ||
KR1020080108597A KR101050007B1 (ko) | 2008-11-03 | 2008-11-03 | 셀 포장재 및 그 제조방법 |
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WO2010062054A2 true WO2010062054A2 (ko) | 2010-06-03 |
WO2010062054A3 WO2010062054A3 (ko) | 2010-07-29 |
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US (1) | US20110212361A1 (ko) |
JP (1) | JP5437387B2 (ko) |
KR (1) | KR101050007B1 (ko) |
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WO (1) | WO2010062054A2 (ko) |
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Also Published As
Publication number | Publication date |
---|---|
CN102202883B (zh) | 2014-08-27 |
CN102202883A (zh) | 2011-09-28 |
WO2010062054A3 (ko) | 2010-07-29 |
JP5437387B2 (ja) | 2014-03-12 |
US20110212361A1 (en) | 2011-09-01 |
KR101050007B1 (ko) | 2011-07-19 |
KR20100049443A (ko) | 2010-05-12 |
JP2012507131A (ja) | 2012-03-22 |
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