WO2019124282A1 - 電池用包装材料及び電池 - Google Patents

電池用包装材料及び電池 Download PDF

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Publication number
WO2019124282A1
WO2019124282A1 PCT/JP2018/046211 JP2018046211W WO2019124282A1 WO 2019124282 A1 WO2019124282 A1 WO 2019124282A1 JP 2018046211 W JP2018046211 W JP 2018046211W WO 2019124282 A1 WO2019124282 A1 WO 2019124282A1
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Prior art keywords
layer
heat
packaging material
battery packaging
battery
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PCT/JP2018/046211
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English (en)
French (fr)
Japanese (ja)
Inventor
大佑 安田
山下　孝典
山下　力也
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大日本印刷株式会社
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Application filed by 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Priority to JP2019561062A priority Critical patent/JP7192795B2/ja
Priority to CN201880082171.XA priority patent/CN111512463A/zh
Publication of WO2019124282A1 publication Critical patent/WO2019124282A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
    • 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
    • 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 battery packaging material and a battery.
  • a concave portion is formed by cold molding, and battery elements such as an electrode and an electrolytic solution are disposed in the space formed by the concave portions, and heat fusible resin layers are mutually attached.
  • thermally welding a battery is obtained in which the battery element is housed inside a package formed of the battery packaging material.
  • the periphery of the battery packaging material is heated using a heated metal plate or the like.
  • the battery element is sealed by heating and pressurizing the unit for several seconds.
  • the present inventors attempted to reduce the time for sealing the battery element to several seconds to about one second.
  • the heat fusible resin layers are not sufficiently heat-fused together in a short time of 1 second, and the seal strength becomes insufficient.
  • heat fusing is performed in a short time such as 1 second, heat fusing at a higher temperature than in the past is required, but when heat fusing is performed at a high temperature, it is included in the base material layer of the battery packaging material It has also been found that moisture is vaporized inside the substrate layer to cause appearance defects.
  • the present invention provides a heat-sealable resin at a high temperature and in a short time, in a battery packaging material comprising a laminate in which a base material layer, a barrier layer, and a heat-sealable resin layer are laminated in this order.
  • the layers can be heat-sealed together, the occurrence of appearance defects of the base layer due to heat-sealed is suppressed, and further, the main object is to provide a battery packaging material excellent in seal strength in a high temperature environment. To aim.
  • the present inventors diligently studied to solve the above-mentioned problems. As a result, it consists of a layered product provided with a substrate layer, a barrier layer, and a heat-fusion resin layer in this order, and resin which constitutes a substrate layer is 220 ° C or more in melting point, and temperature 65 ° C
  • resin which constitutes a substrate layer is 220 ° C or more in melting point, and temperature 65 ° C
  • the resin having a water absorption of 1% by mass or less when left at a relative humidity of 90% for 24 hours and having a heat-fusible resin layer has a melting point of 140 ° C.
  • the battery packaging material having a capacity of 6 g / 10 min or more can thermally fuse the thermally fusible resin layers to each other at a high temperature and in a short time, and suppress the occurrence of appearance defects of the base material layer due to the thermal fusion. Furthermore, it has been found that the seal strength in a high temperature environment is excellent. The present invention has been completed by further studies based on these findings.
  • the laminate comprises at least a base material layer, a barrier layer, and a heat fusible resin layer in this order,
  • the resin constituting the base material layer has a melting point of 220 ° C. or higher, and a water absorption of 1% by mass or less when left at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours,
  • a packaging material for a battery wherein a resin constituting the heat-fusible resin layer has a melting point of 140 ° C. or more and a melt mass flow rate of 6 g / 10 minutes or more.
  • the heat sealable resin layers are heat-treated under the conditions of a temperature of 150 ° C.
  • the heat sealable resin layers are heat-sealed under the conditions of a temperature of 210 ° C. to 250 ° C., a surface pressure of 0.5 MPa, and a time of 1 second, with the heat sealable resin layers of the battery packaging material facing each other. Fusing is performed, and then, using a tensile tester, the thermally fused interface is peeled off and measured under the conditions of a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm in an environment of 25 ° C. 3.
  • Item 4 The heat sealable resin layers are heat-treated under the conditions of a temperature of 150 ° C. to 250 ° C., a surface pressure of 0.5 MPa, and a time of 1 second, with the heat sealable resin layers of the battery packaging material facing each other.
  • the packaging material for a battery according to any one of Items 1 to 3, wherein the tensile strength to be measured is maintained at 2N / 15 mm or more for 1.5 seconds from 1 second after the start of tensile strength measurement. Item 5.
  • the heat sealable resin layers are heat-sealed under the conditions of a temperature of 210 ° C.
  • the heat fusible resin layers are placed under the conditions of a temperature of 210 ° C. to 250 ° C., a surface pressure of 0.5 MPa or more, and a time of 1 second or less, with the heat fusible resin layers of the battery packaging material facing each other.
  • Item 7. The battery packaging material according to any one of items 1 to 6, wherein the base material layer is made of a polyester resin.
  • Item 8 The battery packaging material according to any one of Items 1 to 7, wherein the thickness of the base material layer is 9 to 50 ⁇ m.
  • Item 10 A battery, wherein a battery element comprising at least a positive electrode, a negative electrode, and an electrolyte is contained in a package formed of the battery packaging material according to any one of Items 1 to 9.
  • Item 11 At least a step of laminating the base material layer, the barrier layer, and the heat fusible resin layer in this order;
  • the resin constituting the base material layer has a melting point of 220 ° C. or higher, and a water absorption of 1% by mass or less when left at a temperature of 65 ° C.
  • the manufacturing method of the packaging material for batteries whose melting
  • a battery packaging material comprising at least a base layer, a barrier layer, and a heat-sealable resin layer laminated in this order
  • heat-sealable resin layers at high temperature and in a short time Can be heat-sealed, generation of appearance defects of the base material layer due to heat-sealed is suppressed, and a battery packaging material excellent in seal strength in a high temperature environment can be provided.
  • the battery packaging material of the present invention is composed of a laminate including at least a base layer, a barrier layer, and a heat fusible resin layer in this order, and the resin constituting the base layer has a melting point Is 220 ° C. or higher, and the water absorption when left for 24 hours at a temperature of 65 ° C. and a relative humidity of 90% is 1% by mass or less, and the resin constituting the heat-fusible resin layer has a melting point It is characterized by having a temperature of 140 ° C. or more and a melt mass flow rate of 6 g / 10 minutes or more.
  • the battery packaging material of the present invention by having such a configuration, the heat fusible resin layers can be heat-fused to each other at high temperature and in a short time, and The occurrence of appearance defects is suppressed, and further, the seal strength in a high temperature environment is excellent. Therefore, the battery packaging material of the present invention can be suitably used particularly as a packaging material for a large battery such as a vehicle battery. In addition, it can be suitably used as a battery packaging material for thermally fusing heat-sealable resin layers at a high temperature of 210 ° C. to 250 ° C. for a short time of 1 second.
  • the battery packaging material of the present invention will be described in detail.
  • a numerical range indicated by “to” means “above” or “below”.
  • the notation of 2 to 15 mm means 2 mm or more and 15 mm or less.
  • the battery packaging material 10 of the present invention is, for example, a laminate comprising a base material layer 1, a barrier layer 3 and a heat fusible resin layer 4 in this order as shown in FIG. It consists of
  • the base material layer 1 is the outermost layer side
  • the heat-fusible resin layer 4 is the innermost layer. That is, when assembling the battery, the battery element is sealed by sealing the battery element by thermally fusing the heat-fusible resin layers 4 located on the peripheral edge of the battery element.
  • the battery packaging material of the present invention may be provided with an adhesive layer 2 between the base layer 1 and the barrier layer 3 as shown in FIG. 2, for example. Further, as shown in FIG. 3, an adhesive layer 5 may be provided between the barrier layer 3 and the heat-fusible resin layer 4. Furthermore, as shown in FIG. 4, a surface coating layer 6 may be provided on the outer side of the base material layer 1 (opposite to the heat fusible resin layer 4) as needed.
  • the heat sealing resin layer 4 of the battery packaging material faces each other, and the heat is applied under the conditions of temperature 150 ° C. to 250 ° C., surface pressure 0.5 MPa, time 1 second.
  • the fusion bondable resin layers 4 are heat-sealed, and then, using a tensile tester, under the conditions of a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm under an environment of 25 ° C.
  • the tensile strength measured by peeling the fused interface is preferably maintained at 20 N / 15 mm or more for 1.5 seconds from 1 second after the tensile strength measurement start, 25 N / 15 mm or more It is more preferable that The upper limit of the tensile strength is usually about 130 N / 15 mm or less.
  • the heat fusible resin layers 4 are heat-sealed together, and then, using a tensile tester, under conditions of a temperature of 25 ° C., a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm.
  • the tensile strength measured by peeling the thermally fused interface is preferably maintained at 80 N / 15 mm or more for 1.5 seconds from 1 second after the tensile strength measurement start, 90 N / 15 mm or more It is more preferable that the condition of The upper limit of the tensile strength is usually about 130 N / 15 mm or less.
  • the heat fusible resin layers 4 are heat-sealed together, and then, using a tensile tester, under conditions of a temperature of 140 ° C., a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm.
  • the tensile strength measured by peeling the heat-sealed interface is preferably maintained at 2 N / 15 mm or more for 1.5 seconds from the start of tensile strength measurement, 3 N / 15 mm or more It is more preferable that the condition of The upper limit of the tensile strength is usually about 10 N / 15 mm or less.
  • the heat fusible resin layers 4 are heat-sealed together, and then, using a tensile tester, under conditions of a temperature of 140 ° C., a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm.
  • the tensile strength measured by peeling the heat-fused interface is preferably maintained at 10 N / 15 mm or more for 1.5 seconds from the start of tensile strength measurement.
  • the upper limit of the tensile strength is usually about 15 N / 15 mm or less.
  • the measuring method of the above seal strength can employ
  • the heat fusible resin layers can be thermally fused at a high temperature and in a short time, and the occurrence of appearance defects of the base material layer due to the thermal fusion is suppressed. Excellent seal strength in high temperature environment.
  • the battery packaging material of the present invention has a temperature of 210 ° C. to 250 ° C., a surface pressure of 0.5 MPa or more (preferably a surface, with the thermally fusible resin layers 4 of the battery packaging material facing each other.
  • thermally fusible resin layers 4 In order to seal the battery element by thermally fusing the thermally fusible resin layers 4 under the conditions of a pressure of 0.5 to 3 MPa and a time of 1 second or less (preferably, a time of 0.3 to 1 second) It is preferably used.
  • the base material layer 1 is a layer located on the outermost layer side.
  • the resin constituting the substrate layer 1 needs to have a melting point of 220 ° C. or higher, and a water absorption of 1% by mass or less when left at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours. is there. More specifically, the base material layer 1 only has a melting point of 220 ° C. or higher, and a resin having a water absorption of 1% by mass or less when left to stand at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours. It is preferable that it is comprised.
  • polyester resin As resin which can satisfy such a characteristic, polyester resin etc. are mentioned. Among these, preferably a biaxially stretched polyester resin is mentioned. Specific examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, and copolyester.
  • the base material layer 1 may be formed of a resin film of one layer, or may be formed of a resin film of two or more layers in order to improve pinhole resistance and insulation. Specifically, a multilayer structure in which a plurality of polyester films are laminated may be mentioned.
  • base material layer 1 is multilayer structure, the layered product on which two or more biaxial stretched polyester films were laminated is preferred.
  • the thickness of each layer is preferably about 2 to 25 ⁇ m.
  • the base material layer 1 is formed of a multi-layered resin film
  • two or more resin films may be laminated via an adhesive or an adhesive component such as an adhesive resin, and the type and amount of the adhesive component used, etc. Is similar to that of the adhesive layer 2 described later.
  • limit especially as a method to laminate the resin film of two or more layers A well-known method can be adopted, for example, a dry laminating method, a sandwich laminating method, etc. are mentioned, Preferably a dry laminating method is mentioned.
  • a urethane type adhesive is, for example, about 2 to 5 ⁇ m.
  • the adhesive portion is the base material layer 1 Not included in
  • the melting point of the resin constituting the base material layer 1 may be 220 ° C. or higher, but the heat fusible resin layers 4 are thermally melted at high temperature and short time (for example, 1 second or less at 210 to 250 ° C.) In order to more effectively suppress the occurrence of appearance defects of the substrate layer 1 due to heat fusion when it is attached, it is preferably about 220 to 290 ° C., more preferably about 230 to 280 ° C. .
  • the melting point of the resin is a value measured by differential scanning calorimetry (DSC).
  • the resin constituting the base material layer 1 needs to have a water absorption of 1% by mass or less when left at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours. From the viewpoint of more effectively suppressing the occurrence of appearance defects of the base material layer due to heat fusion when heat fusion bonding resin layers are thermally fused at 250 ° C. for 1 second or less), the water absorption The amount is preferably about 0.1 to 1% by mass, more preferably about 0.1 to 0.5% by mass.
  • the resin constituting the base material layer 1 preferably has a water absorption of about 0.1 to 0.5% by mass when left to stand at a temperature of 25 ° C. and a relative humidity of 50% for 24 hours. More preferably, it is about 0.1 to 0.3% by mass.
  • a lubricant is preferably attached to the surface of the base layer 1.
  • the lubricant is not particularly limited, but preferably includes amide lubricants.
  • Specific examples of the amide-based lubricant include the same as those exemplified for the heat-fusible resin layer 4 described later.
  • the amount thereof is not particularly limited, but it is preferably about 3 mg / m 2 or more, more preferably 4 to 5 in an environment of 24 ° C. and 60% relative humidity. It may be about 15 mg / m 2 , more preferably about 5 to 14 mg / m 2 .
  • the base material layer 1 may contain a lubricant.
  • the lubricant present on the surface of the substrate layer 1 may be one in which the lubricant contained in the resin constituting the substrate layer 1 is exuded, or the lubricant coated on the surface of the substrate layer 1 It may be
  • the thickness of the base material layer 1 is not particularly limited as long as it exhibits the function as the base material layer, but high temperature and short time (for example, at 210 to 250 ° C.) in the battery packaging material having the above configuration of the present invention. 9 to 50 ⁇ m from the viewpoint of more effectively suppressing the occurrence of appearance defects of the base material layer due to heat fusion when heat fusion bonding resin layers are thermally fused in 1 second or less).
  • the degree is more preferably about 10 to 35 ⁇ m, further preferably about 10 to 30 ⁇ m.
  • the adhesive layer 2 is a layer provided between the substrate layer 1 and the barrier layer 3 as needed in order to firmly bond the substrate layer 1 and the barrier layer 3.
  • the adhesive layer 2 is formed of an adhesive capable of adhering the base layer 1 and the barrier layer 3.
  • the adhesive used to form the adhesive layer 2 may be a two-part curable adhesive, or may be a one-part curable adhesive.
  • the adhesion mechanism of the adhesive used to form the adhesive layer 2 is not particularly limited, and may be any of a chemical reaction type, a solvent volatilization type, a heat melting type, a heat pressure type, and the like.
  • the thickness of the adhesive layer 2 is not particularly limited as long as it exhibits the function as a layer to be adhered, but in the battery packaging material having the above-described configuration of the present invention, the heat fusible resin layers Even in the case where heat sealing is performed, generation of appearance defects of the base material layer due to heat sealing is suppressed, and from the viewpoint of improving the seal strength in a high temperature environment, for example, about 1 to 10 ⁇ m, preferably 2 There may be about 5 ⁇ m.
  • the barrier layer 3 is a layer having a function to prevent water vapor, oxygen, light and the like from invading the inside of the battery, in addition to the strength improvement of the battery packaging material.
  • the barrier layer 3 can be formed of a metal foil, a metal deposition film, an inorganic oxide deposition film, a carbon-containing inorganic oxide deposition film, a film provided with these deposition layers, or the like, and is a layer formed of metal Is preferred. Specifically as a metal which comprises the barrier layer 3, aluminum alloy, stainless steel, titanium steel etc. are mentioned, Preferably aluminum alloy and stainless steel are mentioned.
  • the barrier layer 3 is preferably formed of a metal foil, more preferably an aluminum alloy foil or a stainless steel foil.
  • the aluminum alloy foil is, for example, a soft aluminum alloy foil made of an annealed aluminum alloy or the like, from the viewpoint of preventing the occurrence of wrinkles and pin holes in the barrier layer 3 when the battery packaging material is formed. It is more preferable that As a soft aluminum alloy foil, for example, an aluminum alloy having a composition defined by JIS H 4 160: 1994 A802 1 H-O, JIS H 4 160: 1994 A 8079 H-O, JIS H 4000: 2014 A 802 1 P-O, or JIS H 4000: 2014 A 8079 P-O. Foil is mentioned.
  • stainless steel foil from the viewpoint of preventing generation of wrinkles and pin holes in the barrier layer 3 at the time of molding of the battery packaging material, austenitic stainless steel foil, ferritic stainless steel foil and the like are listed.
  • the stainless steel foil is preferably made of austenitic stainless steel.
  • austenitic stainless steels that constitute stainless steel foil include SUS304, SUS301, SUS316L, etc.
  • SUS304 is particularly preferable.
  • the thickness of the barrier layer 3 is not particularly limited as long as it exhibits a function as a barrier layer such as water vapor, but for example, the upper limit is preferably about 85 ⁇ m or less, more preferably about 50 ⁇ m or less, still more preferably 40 ⁇ m or less
  • the lower limit is preferably about 10 ⁇ m or more, and the thickness range is about 10 to 80 ⁇ m, preferably about 10 to 50 ⁇ m.
  • the upper limit of the thickness of the stainless steel foil is preferably about 85 ⁇ m or less, more preferably about 50 ⁇ m or less, still more preferably about 40 ⁇ m or less.
  • the lower limit is about 10 ⁇ m or more
  • the preferable thickness range is about 10 to 85 ⁇ m, about 10 to 50 ⁇ m, more preferably 10 to It may be about 40 ⁇ m, more preferably about 10 to 30 ⁇ m, and still more preferably about 15 to 25 ⁇ m.
  • the barrier layer 3 it is preferable that at least one surface, preferably both surfaces, of the barrier layer 3 be subjected to chemical conversion treatment in order to stabilize adhesion, to prevent dissolution or corrosion, and the like.
  • the chemical conversion treatment means a treatment for forming an acid resistant film on the surface of the barrier layer.
  • the barrier layer 3 contains the acid resistant film.
  • chromate chromate using a chromate compound such as chromium nitrate, chromium fluoride, chromium sulfate, chromium acetate, chromium oxalate, chromium biphosphate, chromate acetyl acetate, chromium chloride, potassium chromium sulfate, etc.
  • a chromate compound such as chromium nitrate, chromium fluoride, chromium sulfate, chromium acetate, chromium oxalate, chromium biphosphate, chromate acetyl acetate, chromium chloride, potassium chromium sulfate, etc.
  • Phosphoric acid chromate treatment using phosphoric acid compounds such as sodium phosphate, potassium phosphate, ammonium phosphate, polyphosphoric acid, etc .
  • X represents a hydrogen atom, a hydroxy group, an alkyl group, a hydroxyalkyl group, an allyl group or a benzyl group.
  • R 1 and R 2 are the same or different and each represents a hydroxy group, an alkyl group or a hydroxyalkyl group.
  • examples of the alkyl group represented by X, R 1 and R 2 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group and an isobutyl group,
  • a linear or branched alkyl group having 1 to 4 carbon atoms such as a tert-butyl group can be mentioned.
  • examples of the hydroxyalkyl group represented by X, R 1 and R 2 include, for example, hydroxymethyl group, 1-hydroxyethyl group, 2-hydroxyethyl group, 1-hydroxypropyl group, 2-hydroxypropyl group, 3- C 1-4 linear or branched C 1 -C 4 substituted with one hydroxy group, such as hydroxypropyl, 1-hydroxybutyl, 2-hydroxybutyl, 3-hydroxybutyl, 4-hydroxybutyl and the like
  • An alkyl group is mentioned.
  • the alkyl group and the hydroxyalkyl group represented by X, R 1 and R 2 may be identical to or different from each other.
  • X is preferably a hydrogen atom, a hydroxy group or a hydroxyalkyl group.
  • the number average molecular weight of the aminated phenol polymer having repeating units represented by the general formulas (1) to (4) is, for example, preferably about 500 to 1,000,000, and about 1,000 to 20,000. More preferable.
  • a coating in which fine particles of aluminum oxide, titanium oxide, cerium oxide, metal oxide such as tin oxide, or barium sulfate are dispersed in phosphoric acid is coated;
  • a method of forming an acid resistant film on the surface of the barrier layer 3 can be mentioned by carrying out the baking treatment at 150 ° C. or higher.
  • a resin layer may be further formed by crosslinking the cationic polymer with a crosslinking agent.
  • the cationic polymer for example, polyethylene imine, an ionic polymer complex composed of polyethylene imine and a polymer having a carboxylic acid, primary amine graft acrylic resin obtained by graft polymerizing a primary amine on an acrylic main skeleton, polyallylamine Or derivatives thereof, aminophenol and the like.
  • these cationic polymers only 1 type may be used and you may use combining 2 or more types.
  • a crosslinking agent the compound which has an at least 1 sort (s) of functional group chosen from the group which consists of an isocyanate group, a glycidyl group, a carboxyl group, and an oxazoline group, a silane coupling agent etc. are mentioned, for example.
  • these crosslinking agents only one type may be used, or two or more types may be used in combination.
  • At least the surface on the inner layer side of the aluminum foil (barrier layer) is first subjected to an alkaline dipping method, an electrolytic cleaning method, an acid cleaning method, an electrolysis method.
  • the degreasing treatment is performed by a known treatment method such as an acid cleaning method or an acid activation method, and then the surface to be degreased is treated with Cr (chromium) phosphate, Ti (titanium) phosphate, Zr (zirconium) phosphate, phosphorus Acid solution (aqueous solution) mainly composed of phosphoric acid metal salts such as zinc (zinc) salts and mixtures of these metal salts, or phosphoric acid nonmetal salts and mixtures of these nonmetallic salts Roll-coating, gravure printing of a treatment solution (aqueous solution) consisting of a treatment solution (aqueous solution) or a mixture of these with an aqueous synthetic resin such as an acrylic resin, a phenol resin or a polyurethane resin.
  • a treatment solution consisting of a treatment solution (aqueous solution) or a mixture of these with an aqueous synthetic resin such as an acrylic resin, a phenol resin or a polyurethane resin.
  • the acid-resistant coating By coating in a known coating method of the immersion method, it is possible to form the acid-resistant coating.
  • CrPO 4 chromium phosphate
  • AlPO 4 aluminum phosphate
  • Al 2 O 3 aluminum oxide
  • Al (OH) x water It becomes an acid-resistant film consisting of aluminum oxide), AlF x (aluminum fluoride), etc.
  • a phosphoric acid Zn (zinc) salt-based treatment solution Zn 2 PO 4 ⁇ 4H 2 O (zinc phosphate hydrate) ), AlPO 4 (aluminum phosphate), Al 2 O 3 (aluminum oxide), Al (OH) x (aluminum hydroxide), AlF x (aluminum fluoride) and the like.
  • an acid resistant coating for example, at least the surface on the inner layer side of an aluminum foil is first subjected to an alkaline dipping method, an electrolytic cleaning method, an acid cleaning method, an electrolytic acid cleaning method, an acid activity
  • An acid resistant film can be formed by degreasing treatment by a known treatment method such as chemical conversion method and then applying known anodizing treatment to the degreasing treatment surface.
  • a coating of a phosphorus compound (for example, a phosphate type) or a chromium compound (for example, a chromic acid type) can be mentioned.
  • phosphates include zinc phosphate, iron phosphate, manganese phosphate, calcium phosphate and chromium phosphate.
  • chromic acid include chromium chromate.
  • an acid resistant coating such as a phosphorus compound (such as phosphate), a chromium compound (such as chromate), a fluoride or a triazine thiol compound Dissolution of aluminum surface, corrosion, in particular dissolution and corrosion of aluminum oxide present on the surface of aluminum, by the prevention of delamination between aluminum and substrate layer, hydrogen fluoride generated by the reaction between electrolyte and water And improve the adhesion (wettability) of the aluminum surface, prevent delamination of the substrate layer and aluminum during heat sealing, and in the case of the emboss type, remove the substrate layer and aluminum during press molding. It shows the effect of preventing lamination.
  • an aqueous solution composed of a phenolic resin, a chromium fluoride (3) compound, and a phosphoric acid three component is applied on the aluminum surface, and the dry baking treatment is good.
  • the acid resistant film further comprises a layer having cerium oxide, phosphoric acid or phosphate, an anionic polymer, and a crosslinking agent for crosslinking the anionic polymer, wherein the phosphoric acid or phosphate is any of the above. It may be blended in an amount of 1 to 100 parts by mass with respect to 100 parts by mass of cerium oxide. It is preferable that the acid resistant coating be a multilayer structure further including a layer having a cationic polymer and a crosslinking agent for crosslinking the cationic polymer.
  • the said anionic polymer is a copolymer which has poly (meth) acrylic acid or its salt, or (meth) acrylic acid or its salt as a main component.
  • the said crosslinking agent is at least 1 sort (s) chosen from the group which consists of a compound which has a functional group in any one of an isocyanate group, glycidyl group, a carboxyl group, and an oxazoline group, and a silane coupling agent.
  • the said phosphoric acid or phosphate is condensed phosphoric acid or condensed phosphate.
  • chemical conversion treatment only one type of chemical conversion treatment may be performed, or two or more types of chemical conversion treatments may be performed in combination. Furthermore, these chemical conversion treatments may be performed using one type of compound alone, or may be performed using two or more types of compounds in combination.
  • chemical conversion treatments chromate chromate treatment, chromate treatment in which a chromic acid compound, a phosphoric acid compound, and an aminated phenol polymer are combined are preferable.
  • the acid resistant film examples include those containing at least one of phosphate, chromate, fluoride, and triazine thiol compound.
  • an acid resistant film containing a cerium compound is also preferable.
  • cerium compound cerium oxide is preferable.
  • an acid resistant film a phosphate type film, a chromate type film, a fluoride type film, a triazine thiol compound film, etc. are mentioned.
  • the acid resistant coating may be one of these or a combination of two or more.
  • a treatment liquid comprising a mixture of a metal salt of phosphoric acid and an aqueous synthetic resin, or a mixture of a nonmetallic metal salt of phosphoric acid and an aqueous synthetic resin It may be formed by the treatment liquid.
  • the analysis of the composition of the acid-resistant film can be performed using, for example, time-of-flight secondary ion mass spectrometry.
  • the amount of the acid resistant coating formed on the surface of the barrier layer 3 in the chemical conversion treatment is not particularly limited, but, for example, in the case of performing the above-mentioned chromate treatment, a chromic acid compound is contained per 1 m 2 of the surface of the barrier layer 3 About 0.5 to 50 mg, preferably about 1.0 to 40 mg in terms of chromium, about 0.5 to 50 mg, preferably about 1.0 to 40 mg, of the phosphorus compound in terms of phosphorus, and The content is desirably about 0 to 200 mg, preferably about 5.0 to 150 mg.
  • the thickness of the acid-resistant coating is not particularly limited, but is preferably about 1 nm to 20 ⁇ m, more preferably about 1 nm to 100 nm, from the viewpoint of the cohesion of the film and the adhesion to the barrier layer and the heat fusible resin layer. More preferably, about 1 nm to 50 nm can be mentioned.
  • the thickness of the acid-resistant film can be measured by a transmission electron microscope or a combination of an observation by a transmission electron microscope and energy dispersive X-ray spectroscopy or electron beam energy loss spectroscopy.
  • secondary ions consisting of Ce, P and O (for example, at least one of Ce 2 PO 4 + , CePO 4 ⁇ , etc.
  • peaks derived from secondary ions for example, at least one of CrPO 2 + , CrPO 4 ⁇ and the like consisting of Cr, P and O, for example.
  • the temperature of the barrier layer is 70 after the solution containing the compound used for forming the acid resistant coating is applied to the surface of the barrier layer by the bar coating method, roll coating method, gravure coating method, immersion method or the like. It is carried out by heating to about 200 ° C.
  • the barrier layer may be subjected in advance to a degreasing treatment by an alkaline immersion method, an electrolytic cleaning method, an acid cleaning method, an electrolytic acid cleaning method or the like. By performing the degreasing treatment in this manner, the chemical conversion treatment on the surface of the barrier layer can be performed more efficiently.
  • the thermally fusible resin layer 4 corresponds to the innermost layer, and is a layer that thermally fuses the thermally fusible resin layers when the battery is assembled to seal the battery element.
  • the resin constituting the heat-fusible resin layer 4 needs to have a melting point of 140 ° C. or more and a melt mass flow rate (MFR) of 6 g / 10 minutes or more.
  • the melting point of the resin constituting the heat-fusible resin layer 4 may be 140 ° C.
  • the heat-fusible resin layers Even when heat fusion is performed, from the viewpoint of suppressing the occurrence of appearance defects of the base material layer due to heat fusion and further improving the seal strength in a high temperature environment, preferably about 140 to 160 ° C., more preferably The temperature may be about 140 to 155 ° C., and more preferably about 140 to 150 ° C.
  • the melting point of the resin is a value measured by differential scanning calorimetry (DSC).
  • melt mass flow rate (MFR) of the resin constituting the heat-fusible resin layer 4 may be 6 g / 10 min or more, but from the above viewpoint, preferably it is about 8 to 25 g / 10 min. It is preferably about 10 to 25 g / 10 minutes, and more preferably about 10 to 20 g / 10 minutes.
  • MFR is a value measured by JISK7210.
  • the above-mentioned melting point and MFR of the heat fusible resin layer 4 may satisfy the above requirements as a whole of the resin constituting the heat fusible resin layer 4.
  • the resin component used for the heat-fusible resin layer 4 satisfies the above melting point and MFR and is not particularly limited as long as it can be heat-fused, but, for example, polyolefin, cyclic polyolefin, acid-modified polyolefin And acid-modified cyclic polyolefins. That is, the resin constituting the heat-fusible resin layer 4 may or may not contain a polyolefin skeleton, and preferably contains a polyolefin skeleton.
  • the resin constituting the heat-fusible resin layer 4 may contain a polyolefin skeleton, for example, by infrared spectroscopy, gas chromatography mass spectrometry, etc., and the analysis method is not particularly limited.
  • a peak derived from maleic acid is detected in the vicinity of the wave number of 1760 cm -1 and near the wave number 1780 cm -1.
  • the peak may be small and not detected. In that case, analysis is possible by nuclear magnetic resonance spectroscopy.
  • polystyrene resin examples include polyethylenes such as low density polyethylene, medium density polyethylene, high density polyethylene and linear low density polyethylene; homopolypropylene, block copolymers of polypropylene (for example, block copolymers of propylene and ethylene), polypropylene Polypropylenes such as random copolymers of (for example, random copolymers of propylene and ethylene); terpolymers of ethylene-butene-propylene and the like.
  • polyethylenes such as low density polyethylene, medium density polyethylene, high density polyethylene and linear low density polyethylene
  • homopolypropylene block copolymers of polypropylene (for example, block copolymers of propylene and ethylene)
  • polypropylene Polypropylenes such as random copolymers of (for example, random copolymers of propylene and ethylene); terpolymers of ethylene-butene-propylene and the like.
  • polyethylene and polypropylene are mentioned.
  • the cyclic polyolefin is a copolymer of an olefin and a cyclic monomer, and examples of the olefin which is a constituent monomer of the cyclic polyolefin include ethylene, propylene, 4-methyl-1-pentene, butadiene, isoprene and the like. .
  • a cyclic monomer which is a constituent monomer of the cyclic polyolefin for example, cyclic alkenes such as norbornene; specifically, cyclic dienes such as cyclopentadiene, dicyclopentadiene, cyclohexadiene, norbornadiene, and the like can be mentioned.
  • these polyolefins preferred are cyclic alkenes, more preferably norbornene.
  • the acid-modified polyolefin is a polymer obtained by modifying the polyolefin by block polymerization or graft polymerization with an acid component such as a carboxylic acid.
  • an acid component such as a carboxylic acid.
  • carboxylic acids such as maleic acid, acrylic acid, itaconic acid, crotonic acid, maleic anhydride, itaconic anhydride, or anhydrides thereof.
  • the acid-modified cyclic polyolefin is prepared by copolymerizing part of the monomers constituting the cyclic polyolefin with an ⁇ , ⁇ -unsaturated carboxylic acid or an anhydride thereof, or ⁇ , ⁇ - to the cyclic polyolefin. It is a polymer obtained by block polymerization or graft polymerization of unsaturated carboxylic acid or its anhydride.
  • the cyclic polyolefin to be carboxylic acid modified is the same as described above. Moreover, as a carboxylic acid used for modification
  • polyolefins such as polypropylene, carboxylic acid-modified polyolefins, and more preferably polypropylene and acid-modified polypropylenes.
  • the heat fusible resin layer 4 may be formed of one type of resin component alone, or may be formed of a blend polymer in which two or more types of resin components are combined. Furthermore, although the heat fusible resin layer 4 may be formed of only one layer, it may be formed of two or more layers of the same or different resin components.
  • a lubricant adheres to the surface of the heat-fusible resin layer.
  • the lubricant is not particularly limited, but preferably includes amide lubricants.
  • Specific examples of the amide lubricant include saturated fatty acid amide, unsaturated fatty acid amide, substituted amide, methylolamide, saturated fatty acid bisamide, unsaturated fatty acid bisamide and the like.
  • Specific examples of the saturated fatty acid amide include lauric acid amide, palmitic acid amide, stearic acid amide, behenic acid amide, hydroxystearic acid amide and the like.
  • the unsaturated fatty acid amide include oleic acid amide and erucic acid amide.
  • substituted amide include N-oleyl palmitic acid amide, N-stearyl stearic acid amide, N-stearyl oleic acid amide, N-oleyl stearic acid amide, N-stearyl erucic acid amide and the like.
  • methylolamide include methylol stearic acid amide and the like.
  • saturated fatty acid bisamide examples include methylenebisstearic acid amide, ethylenebiscapric acid amide, ethylenebislauric acid amide, ethylenebisstearic acid amide, ethylenebishydroxystearic acid amide, ethylenebisbehenic acid amide, hexamethylene bisstearin Acid amide, hexamethylene bisbehenamide, hexamethylene hydroxystearic amide, N, N'-distearyl adipamide, N, N'-distearyl sebacate amide and the like can be mentioned.
  • unsaturated fatty acid bisamides include ethylene bis oleic acid amide, ethylene bis erucic acid amide, hexamethylene bis oleic acid amide, N, N'-dioleyl adipic acid amide, N, N'-dioleyl sebacic acid amide Etc.
  • fatty acid ester amides include stearoamidoethyl stearate and the like.
  • specific examples of the aromatic bisamides include m-xylylene bis-stearic acid amide, m-xylylene bis-hydroxystearic acid amide, N, N'-distearyl isophthalic acid amide and the like.
  • the lubricant may be used alone or in combination of two or more.
  • the amount thereof is not particularly limited, but it is preferably about 3 mg / m 2 or more, more preferably in an environment of 24 ° C. and 60% relative humidity. Is about 4 to 15 mg / m 2 , and more preferably about 5 to 14 mg / m 2 .
  • the heat fusible resin layer 4 may contain a lubricant.
  • the lubricant present on the surface of the heat-fusible resin layer 4 may be one in which the lubricant contained in the resin constituting the heat-fusible resin layer 4 is exuded, or the heat-fusible resin layer The surface of 4 may be coated with a lubricant.
  • the thickness of the heat fusible resin layer 4 is not particularly limited as long as it exhibits the function as the heat fusible resin layer, but in the battery packaging material having the above configuration of the present invention, high temperature and short time Even when the heat fusible resin layers are heat-sealed together, it is preferable from the viewpoint of suppressing the occurrence of appearance defects of the base material layer due to heat-sealing and further improving the seal strength in a high temperature environment. It may be about 30 to 140 ⁇ m, more preferably about 40 to 120 ⁇ m, and still more preferably about 45 to 100 ⁇ m.
  • the adhesive layer 5 is a layer optionally provided between the barrier layer 3 and the heat-fusible resin layer 4 in order to firmly bond the barrier layer 3 and the heat-fusible resin layer 4.
  • the adhesive layer 5 is formed of a resin capable of adhering the barrier layer 3 and the heat fusible resin layer 4.
  • resin used for formation of adhesion layer 5 the thing of the adhesion mechanism, the kind of adhesive agent component, etc. can use the thing similar to the adhesive illustrated by adhesive agent layer 2.
  • resin used for formation of the contact bonding layer 5 polyolefin resin, such as polyolefin mentioned above-mentioned heat-fusion resin layer 4, cyclic polyolefin, carboxylic acid modified polyolefin, carboxylic acid modified cyclic polyolefin, can also be used. .
  • the polyolefin a carboxylic acid-modified polyolefin is preferable, and a carboxylic acid-modified polypropylene is particularly preferable, from the viewpoint of excellent adhesion between the barrier layer 3 and the heat-fusible resin layer 4. That is, the resin constituting the adhesive layer 5 may or may not contain a polyolefin skeleton, and preferably contains a polyolefin skeleton. It is possible to analyze that the resin constituting the adhesive layer 5 contains a polyolefin skeleton, for example, by infrared spectroscopy, gas chromatography-mass spectrometry, etc., and there is no particular limitation on the analysis method.
  • a peak derived from maleic acid is detected in the vicinity of the wave number of 1760 cm -1 and near the wave number 1780 cm -1.
  • the peak may be small and not detected. In that case, analysis is possible by nuclear magnetic resonance spectroscopy.
  • the adhesive layer 5 is a resin composition containing an acid-modified polyolefin and a curing agent. It may be a cured product.
  • the acid-modified polyolefin preferably, the same ones as the carboxylic acid-modified polyolefin and the carboxylic acid-modified cyclic polyolefin exemplified in the heat fusible resin layer 4 can be exemplified.
  • the curing agent is not particularly limited as long as it cures acid-modified polyolefin.
  • examples of the curing agent include epoxy-based curing agents, polyfunctional isocyanate-based curing agents, carbodiimide-based curing agents, oxazoline-based curing agents, and the like.
  • the epoxy curing agent is not particularly limited as long as it is a compound having at least one epoxy group.
  • the epoxy curing agent include epoxy resins such as bisphenol A diglycidyl ether, modified bisphenol A diglycidyl ether, novolak glycidyl ether, glycerin polyglycidyl ether, polyglycerin polyglycidyl ether and the like.
  • the polyfunctional isocyanate-based curing agent is not particularly limited as long as it is a compound having two or more isocyanate groups.
  • Specific examples of the polyfunctional isocyanate-based curing agent include isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), tolylene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), those obtained by polymerizing or denating these, or the like Mixtures and copolymers with other polymers may be mentioned.
  • curing agent the polycarbodiimide compound which has a carbodiimide group 2 or more at least is preferable.
  • the oxazoline-based curing agent is not particularly limited as long as it is a compound having an oxazoline skeleton.
  • Specific examples of the oxazoline curing agent include Epocross series manufactured by Nippon Shokubai Co., Ltd.
  • the curing agent may be composed of two or more types of compounds.
  • the content of the curing agent in the resin composition forming the adhesive layer 5 is preferably in the range of about 0.1 to 50% by mass, and more preferably in the range of about 0.1 to 30% by mass, More preferably, it is in the range of about 0.1 to 10% by mass.
  • the thickness of the adhesive layer 5 is not particularly limited as long as it exhibits the function as an adhesive layer, but in the case of using the adhesive exemplified in the adhesive layer 2, it is preferably about 1 to 10 ⁇ m, more preferably 1 There may be about 5 ⁇ m. Further, in the case of using the resin exemplified for the heat fusible resin layer 4, it is preferably about 2 to 50 ⁇ m, more preferably about 10 to 40 ⁇ m. In the case of a cured product of an acid-modified polyolefin and a curing agent, it is preferably about 30 ⁇ m or less, more preferably about 0.1 to 20 ⁇ m, and still more preferably about 0.5 to 5 ⁇ m. When the adhesive layer 5 is a cured product of a resin composition containing an acid-modified polyolefin and a curing agent, the adhesive layer 5 can be formed by applying the resin composition and curing it by heating or the like.
  • a surface covering layer 6 In the battery packaging material of the present invention, on the base material layer 1 (the barrier layer of the base material layer 1), as needed, for the purpose of improving designability, electrolytic solution resistance, abrasion resistance, moldability, etc. If necessary, a surface covering layer 6 may be provided on the side opposite to 3). The surface covering layer 6 is a layer located in the outermost layer when the battery is assembled.
  • the surface coating layer 6 can be formed of, for example, polyvinylidene chloride, polyester resin, urethane resin, acrylic resin, epoxy resin or the like. Among these, the surface coating layer 6 is preferably formed of a two-component curable resin. Examples of the two-component curable resin that forms the surface covering layer 6 include a two-component curable urethane resin, a two-component curable polyester resin, and a two-component curable epoxy resin. Further, an additive may be blended in the surface coating layer 6.
  • Examples of the additive include fine particles having a particle diameter of about 0.5 nm to 5 ⁇ m.
  • the material of the additive is not particularly limited, and examples thereof include metals, metal oxides, inorganic substances, and organic substances.
  • the shape of the additive is not particularly limited, and examples thereof include spheres, fibers, plates, indeterminate shapes, and balloons.
  • talc silica, graphite, kaolin, montmorrroid, montmorillonite, synthetic mica, hydrotalcite, silica gel, zeolite, aluminum hydroxide, magnesium hydroxide, zinc oxide, magnesium oxide, aluminum oxide, Neodymium oxide, antimony oxide, titanium oxide, cerium oxide, calcium sulfate, barium sulfate, calcium carbonate, calcium silicate, lithium carbonate, calcium benzoate, calcium oxalate, magnesium stearate, alumina, carbon black, carbon nanotubes, high Melting point nylon, crosslinked acrylic, crosslinked styrene, crosslinked polyethylene, benzoguanamine, gold, aluminum, copper, nickel and the like can be mentioned.
  • additives may be used alone or in combination of two or more.
  • silica, barium sulfate and titanium oxide are preferably mentioned from the viewpoint of dispersion stability and cost.
  • the surface may be subjected to various surface treatments such as insulation treatment, high dispersion treatment, and the like.
  • the content of the additive in the surface coating layer is not particularly limited, but preferably about 0.05 to 1.0% by mass, more preferably about 0.1 to 0.5% by mass.
  • coating 2-component curable resin which forms the surface coating layer 6 on one surface of the base material layer 1 is mentioned.
  • the additive may be added to and mixed with the two-component curable resin and then applied.
  • the thickness of the surface coating layer 6 is not particularly limited as long as the above-described function as the surface coating layer 6 is exerted, and for example, 0.5 to 10 ⁇ m, preferably 1 to 5 ⁇ m can be mentioned.
  • the method for producing the battery packaging material of the present invention is not particularly limited as long as a laminate obtained by laminating each layer of a predetermined composition is obtained. That is, the method for producing a packaging material for a battery of the present invention comprises the step of laminating at least the base layer 1, the barrier layer 3 and the heat-fusible resin layer 4 in this order,
  • the resin constituting the material layer 1 has a melting point of 220 ° C. or higher, and a water absorption of 1% by mass or less when left to stand at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours.
  • the resin constituting the conductive resin layer 4 has a melting point of 140 ° C. or more and a melt mass flow rate of 6 g / 10 minutes or more.
  • the manufacturing method of the packaging material for batteries of this invention it is as follows. First, a laminate (hereinafter sometimes referred to as “laminate A”) in which the base material layer 1, the adhesive layer 2, and the barrier layer 3 are sequentially laminated is formed. Specifically, the laminate A is formed by, for example, a gravure coating method using an adhesive used to form the adhesive layer 2 on the base layer 1 or the barrier layer 3 whose surface is chemically treated as necessary. It can carry out by the dry laminating method which makes the said barrier layer 3 or the base material layer 1 laminate, and hardens the adhesive layer 2 after applying and drying by coating methods, such as a coating method.
  • coating methods such as a coating method.
  • the adhesive layer 5 and the heat-fusible resin layer 4 are laminated in this order on the barrier layer 3 of the laminate A.
  • a method of laminating the adhesive layer 5 and the heat-fusible resin layer 4 by coextrusion on the barrier layer 3 of the laminate A co-extrusion laminating method
  • the adhesive for forming the layer 5 is extruded or solution coated, laminated by drying or baking at a high temperature, and the like, and the heat fusible resin layer 4 previously formed into a sheet on the adhesive layer 5 is formed.
  • the surface covering layer 6 is laminated on the surface of the base layer 1 opposite to the barrier layer 3.
  • the surface coating layer 6 can be formed, for example, by applying the above-mentioned resin that forms the surface coating layer 6 on the surface of the base layer 1.
  • the order of the process of laminating the barrier layer 3 on the surface of the base material layer 1 and the process of laminating the surface coating layer 6 on the surface of the base material layer 1 is not particularly limited.
  • the barrier layer 3 may be formed on the surface of the base layer 1 opposite to the surface covering layer 6.
  • a laminated body consisting of the adhesive layer 5 / the heat fusible resin layer 4 to be provided is formed, but in order to strengthen the adhesion of the adhesive layer 2 or the adhesive layer 5, further, a heat roll contact type, a hot air It may be subjected to a heat treatment such as a formula, a near infrared type or a far infrared type.
  • the conditions for such heat treatment include, for example, 150 ° C. to 250 ° C. and 1 minute to 5 minutes.
  • each layer constituting the laminate improves or stabilizes film forming ability, lamination processing, final product secondary processing (pouching, embossing) suitability, etc., as necessary.
  • surface activation treatments such as corona treatment, blast treatment, oxidation treatment, and ozone treatment may be performed.
  • the battery packaging material of the present invention is used for a package for sealing and housing battery elements such as a positive electrode, a negative electrode, and an electrolyte. That is, the battery element provided with at least a positive electrode, a negative electrode, and an electrolyte can be accommodated in a package formed of the battery packaging material of the present invention to make a battery.
  • a battery element comprising at least a positive electrode, a negative electrode, and an electrolyte is a battery packaging material of the present invention, in which the metal terminal connected to each of the positive electrode and the negative electrode protrudes outward.
  • the battery is covered by forming flanges (areas in which the heat fusible resin layers are in contact with each other) on the periphery of the element, and heat sealing the heat fusible resin layers of the flanges to seal them.
  • a battery using a packaging material is provided.
  • the battery packaging material of the present invention may be used for either a primary battery or a secondary battery, but is preferably a secondary battery.
  • the type of secondary battery to which the battery packaging material of the present invention is applied is not particularly limited.
  • lithium ion battery, lithium ion polymer battery, lead storage battery, nickel hydrogen storage battery, nickel cadmium storage battery, nickel Iron storage batteries, nickel-zinc storage batteries, silver oxide-zinc storage batteries, metal air batteries, multivalent cation batteries, capacitors, capacitors and the like can be mentioned.
  • lithium ion batteries and lithium ion polymer batteries are mentioned as a suitable application object of the packaging material for batteries of the present invention.
  • the heat fusible resin layers can be thermally fused at a high temperature and in a short time, and the occurrence of appearance defects of the base material layer due to the thermal fusion is suppressed. Since the seal strength in a high temperature environment is excellent, it can be suitably used for a large battery such as a vehicle battery. In particular, as a battery to which the battery packaging material of the present invention can be suitably applied, a large battery having a battery capacity of 30 Ah or more can be mentioned.
  • Example 1-6, Comparative Example 1-18, Reference Example 1-6, Reference Comparative Example 1-18 As a substrate layer, polyethylene terephthalate (PET) film (12 ⁇ m in thickness), polyethylene naphthalate (PEN) film (12 ⁇ m in thickness), stretched nylon (ONy) film (15 ⁇ m in thickness), polyethylene terephthalate film (PET, A laminated film (PEN / ONy) in which a 12 ⁇ m thick film and an oriented nylon film (ONy, 15 ⁇ m thick) are bonded with a 3 ⁇ m thick two-component urethane adhesive (polyol compound and aromatic isocyanate compound) is prepared. did.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • ONy stretched nylon
  • PET polyethylene terephthalate film
  • the material of the resin constituting the base layer and the melting point of the resin are as described in Tables 1 to 3, respectively.
  • the melting point of PET is 255 ° C.
  • the melting point of PEN is 270 ° C.
  • the melting point of ONy is 220 ° C. It is.
  • the melting points of these resins are values measured by differential scanning calorimetry (DSC). When the laminated film of PET and ONy was used as a base material layer, ONy was arrange
  • barrier layers aluminum foils (JIS H4160: 1994 A8021 H-O) each having a thickness of 40 ⁇ m were prepared as barrier layers.
  • a two-component urethane adhesive polyol compound and aromatic isocyanate compound
  • an adhesive layer 3 ⁇ m in thickness
  • the adhesive layer on the barrier layer and the base material layer were laminated by a dry lamination method, and then an aging treatment was performed to produce a laminate of base material layer / adhesive layer / barrier layer.
  • chemical conversion treatment is performed on both sides of the barrier layer.
  • the chemical conversion treatment of the barrier layer is carried out on both sides of the barrier layer by a roll coating method so that the coating amount of chromium is 10 mg / m 2 (dry mass) with a treatment liquid consisting of a phenol resin, a chromium fluoride compound and phosphoric acid. It did by applying and baking.
  • MFR melt mass flow rate
  • a heat fusible resin layer is laminated on the barrier layer by melt-extruding polypropylene (PP) having a thickness ( ⁇ m), and base material layer / adhesive layer / barrier layer / heat fusible property
  • PP polypropylene
  • Examples 1 to 6 and Referential Examples 1 to 6 are battery packaging materials having the same configuration, except that storage environments at the time of measuring the following seal strengths are different. Further, Comparative Examples 1 to 18 and Reference Comparative Examples 1 to 18 are battery packaging materials having the same configuration except that storage environments at the time of measuring the following seal strengths are different.
  • each battery packaging material 10 obtained above was allowed to stand for 24 hours in the storage environment of Tables 1 to 3.
  • each battery packaging material was cut into a rectangle of width 60 mm ⁇ length 150 mm to obtain a test sample.
  • the test sample was folded back at the center P in the lengthwise direction, and the heat fusible resin layers were made to face each other.
  • the heat fusible resin layers were heat-fused to each other in the entire width direction (that is, 60 mm) of 3 mm (width of metal plate).
  • the width 15 mm of the test sample was cut off.
  • the heat-sealed area is indicated by S.
  • using a tensile tester under the conditions of a temperature of 25 ° C. or an environment of a temperature 140 ° C., under the conditions of a tensile speed of 300 mm / min, a peeling angle of 180 °, and a distance between chucks of 50 mm.
  • the melting point of the resin constituting the base material layer is 220 ° C. or higher, and when it is left at a temperature of 65 ° C. and a relative humidity of 90% for 24 hours (storage environment Example 1 to 1 having a water absorption coefficient of 1% by mass or less, and further having a melting point of 140 ° C. or more and a melt mass flow rate of 6 g / 10 min or more of the resin constituting the heat-fusible resin layer.
  • the heat fusible resin layers can be heat-fused together at high temperature and in a short time (for example, 1 second or less at 210 to 250.degree. C.). It is understood that the occurrence of defects is suppressed, and furthermore, the seal strength in a very high temperature environment of 140 ° C. is excellent.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Laminated Bodies (AREA)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022155574A (ja) * 2021-03-30 2022-10-13 エルジー エナジー ソリューション リミテッド パウチ型二次電池およびこれを含む電池モジュール

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012133683A1 (ja) * 2011-03-29 2012-10-04 昭和電工パッケージング株式会社 成形用包装材および電池用ケース
JP2015201387A (ja) * 2014-04-09 2015-11-12 凸版印刷株式会社 二次電池用外装材、二次電池、及び二次電池の製造方法
JP2016186872A (ja) * 2015-03-27 2016-10-27 大日本印刷株式会社 電池用包装材料

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5525938B2 (ja) * 2010-07-02 2014-06-18 昭和電工パッケージング株式会社 成形用包装材及びその製造方法
JP5801550B2 (ja) * 2010-11-29 2015-10-28 昭和電工パッケージング株式会社 成形用包装材及びその製造方法
CN104969378B (zh) * 2013-02-06 2019-10-22 大日本印刷株式会社 电池用包装材料
EP3043399B1 (en) * 2013-09-03 2024-04-24 Dai Nippon Printing Co., Ltd. Resin composition for sealant layer of battery packaging material
JP6492497B2 (ja) * 2014-09-30 2019-04-03 大日本印刷株式会社 電池用包装材料
CN113410552B (zh) * 2014-09-30 2023-02-21 大日本印刷株式会社 电池用包装材料和电池
JP2017069203A (ja) * 2015-09-30 2017-04-06 大日本印刷株式会社 電池用包装材料及び電池
CN114421061A (zh) * 2016-04-06 2022-04-29 大日本印刷株式会社 电池用包装材料、其制造方法和电池
JP6996499B2 (ja) * 2016-04-27 2022-01-17 大日本印刷株式会社 電池用包装材料、その製造方法、電池及びその製造方法
JP7020401B2 (ja) * 2016-04-28 2022-02-16 大日本印刷株式会社 電池用包装材料及び電池

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012133683A1 (ja) * 2011-03-29 2012-10-04 昭和電工パッケージング株式会社 成形用包装材および電池用ケース
JP2015201387A (ja) * 2014-04-09 2015-11-12 凸版印刷株式会社 二次電池用外装材、二次電池、及び二次電池の製造方法
JP2016186872A (ja) * 2015-03-27 2016-10-27 大日本印刷株式会社 電池用包装材料

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JP2022155574A (ja) * 2021-03-30 2022-10-13 エルジー エナジー ソリューション リミテッド パウチ型二次電池およびこれを含む電池モジュール

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