JP6747237B2 - Battery packaging materials and batteries - Google Patents

Battery packaging materials and batteries Download PDF

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JP6747237B2
JP6747237B2 JP2016207825A JP2016207825A JP6747237B2 JP 6747237 B2 JP6747237 B2 JP 6747237B2 JP 2016207825 A JP2016207825 A JP 2016207825A JP 2016207825 A JP2016207825 A JP 2016207825A JP 6747237 B2 JP6747237 B2 JP 6747237B2
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layer
battery
packaging material
mass
metal layer
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JP2018073474A (en
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岡田　智之
智之 岡田
圭太郎 宮澤
圭太郎 宮澤
木谷　昌幸
昌幸 木谷
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Sumitomo Electric Industries Ltd
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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
    • H01M50/116—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—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
    • H01M50/122—Composite material consisting of a mixture of organic and inorganic materials
    • 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
    • H01M50/183—Sealing members
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • 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
    • B32B2255/26—Polymeric 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
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/18—Fuel cells
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Laminated Bodies (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Description

本発明は、電池用包装材料および電池に関するものである。 The present invention relates to a battery packaging material and a battery.

特許文献１には、最外層／バリア層／最内層、または、最外層／バリア層／中間層／最内層からなる積層体において、前記バリア層より最内層側における少なくとも一つの層間が、ドライラミネートにより積層され、更に、該上記のラミネート用接着材層が、特定の主剤と特定の硬化剤とからなる積層体が開示されている。 In Patent Document 1, in the laminated body composed of the outermost layer/barrier layer/innermost layer or the outermost layer/barrier layer/intermediate layer/innermost layer, at least one layer on the innermost layer side of the barrier layer is dry laminated. A laminated body in which the above-mentioned laminating adhesive layer is composed of a specific base material and a specific curing agent is disclosed.

特開２００１−３０４０７号公報JP 2001-30407 A

電池用包装材料の金属層にアルミニウムを使用する場合、電池内の電解液に接触することでアルミニウムとシール樹脂が剥離するおそれがある。この剥離を防止するために、アルミニウムをベーマイト処理又はクロメート処理等により表面処理する方法が知られている。しかし、製造上の観点から表面処理されてないアルミニウムを用いて、電解液に浸してもシール樹脂が金属層から剥がれない電池用包装材料を得ることが望ましい。 When aluminum is used for the metal layer of the battery packaging material, the aluminum and the seal resin may be peeled off by coming into contact with the electrolytic solution in the battery. In order to prevent this peeling, a method is known in which aluminum is surface-treated by boehmite treatment, chromate treatment, or the like. However, from the viewpoint of manufacturing, it is desirable to use a non-surface-treated aluminum to obtain a battery packaging material in which the seal resin does not peel off from the metal layer even when immersed in an electrolytic solution.

本発明の目的は、表面処理されていないアルミニウムを用いて、耐電解液性に優れる電池用包装材料及び電池を提供することにある。 An object of the present invention is to provide a battery packaging material and a battery having excellent electrolytic solution resistance, using aluminum that has not been surface-treated.

本発明の電池用包装材料は、少なくとも、基材樹脂層、金属層、及びシール樹脂層をこの順で含む積層体からなる電池用包装材料であって、
前記金属層が表面処理されていないアルミニウムからなり、
前記シール樹脂層が前記金属層に直接貼り合されており、
前記シール樹脂層が１以上の層を有し、
前記１以上の層のうちの前記金属層に接触する層が、リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を含有する。 The battery packaging material of the present invention is at least a battery packaging material comprising a laminate including a base resin layer, a metal layer, and a sealing resin layer in this order,
The metal layer is made of aluminum that is not surface-treated,
The seal resin layer is directly bonded to the metal layer,
The sealing resin layer has one or more layers,
The layer of the one or more layers that contacts the metal layer contains a composition that includes magnesium phosphate, magnesium oxide, and an organic amine.

また、本発明の電池は、上記電池用包装材料から形成された包装容器内に、少なくとも正極、負極、及び電解質を収容し、各電極からのリード線を外側に導出させた状態で周辺部をシールしてなる。 Further, the battery of the present invention, in the packaging container formed from the battery packaging material, at least the positive electrode, the negative electrode, and the electrolyte is housed, the peripheral portion in the state where the lead wire from each electrode is led to the outside. It will be sealed.

本発明によれば、表面処理されていないアルミニウムを用いて、耐電解液性に優れる電池用包装材料及び電池を提供することができる。 According to the present invention, it is possible to provide a battery packaging material and a battery having excellent electrolytic solution resistance by using aluminum that has not been surface-treated.

本発明の実施形態の電池用包装材料の一例を示す図である。It is a figure which shows an example of the packaging material for batteries of embodiment of this invention. 本発明の実施形態の電池の一例を示す図である。It is a figure which shows an example of the battery of embodiment of this invention. 本発明の実施形態の電池用包装材料の一例を示す図である。It is a figure which shows an example of the packaging material for batteries of embodiment of this invention. 本発明の実施形態の電池の一例を示す図である。It is a figure which shows an example of the battery of embodiment of this invention. 本発明の実施形態の電池の一例を示す図である。It is a figure which shows an example of the battery of embodiment of this invention.

［本発明の実施形態の説明］
最初に本発明の実施形態の内容を列記して説明する。
本願発明の実施形態に係る電池用包装材料は、
（１）少なくとも、基材樹脂層、金属層、及びシール樹脂層をこの順で含む積層体からなる電池用包装材料であって、
前記金属層が表面処理されていないアルミニウムからなり、
前記シール樹脂層が前記金属層に直接貼り合されており、
前記シール樹脂層が１以上の層を有し、
前記１以上の層のうちの前記金属層に接触する層が、リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を含有する。
この構成によれば、表面処理されていないアルミニウムを用いて、耐電解液性に優れる電池用包装材料を提供することができる。 [Description of Embodiments of the Present Invention]
First, the contents of the embodiments of the present invention will be listed and described.
The battery packaging material according to the embodiment of the present invention,
(1) A battery packaging material comprising a laminate including at least a base resin layer, a metal layer, and a sealing resin layer in this order,
The metal layer is made of aluminum that is not surface-treated,
The seal resin layer is directly bonded to the metal layer,
The sealing resin layer has one or more layers,
The layer of the one or more layers that contacts the metal layer contains a composition that includes magnesium phosphate, magnesium oxide, and an organic amine.
With this configuration, it is possible to provide a battery packaging material having excellent electrolytic solution resistance by using aluminum that has not been surface-treated.

（２）また、（１）の電池用包装材料は、
前記金属層に接触する層が、さらにホスホン酸カルシウムを含む組成物を含有してもよい。
この構成によれば、より耐電解液性に優れる電池用包装材料を提供することができる。 (2) Further, the battery packaging material of (1) is
The layer in contact with the metal layer may further contain a composition containing calcium phosphonate.
According to this structure, it is possible to provide a battery packaging material that is more excellent in electrolytic solution resistance.

（３）また、（１）又は（２）の電池用包装材料は、
前記金属層に接触する層が、さらにリン酸亜鉛を含む組成物を含有してもよい。
この構成によれば、より耐電解液性に優れる電池用包装材料を提供することができる。 (3) Also, the battery packaging material of (1) or (2) is
The layer in contact with the metal layer may further contain a composition containing zinc phosphate.
According to this structure, it is possible to provide a battery packaging material that is more excellent in electrolytic solution resistance.

（４）また、（１）〜（３）のいずれかの電池用包装材料は、
前記金属層に接触する層が、前記リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を、３質量％以上８質量％以下の割合で含有してもよい。
この構成によれば、特に耐電解液性に優れる電池用包装材料を提供することができる。 (4) Further, the battery packaging material according to any one of (1) to (3),
The layer in contact with the metal layer may contain the composition containing magnesium phosphate, magnesium oxide, and an organic amine in a proportion of 3% by mass or more and 8% by mass or less.
According to this structure, it is possible to provide a battery packaging material that is particularly excellent in electrolytic solution resistance.

（５）また、（２）の電池用包装材料は、
前記リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物と、前記ホスホン酸カルシウムを含む組成物との質量比が、１：２〜２：１でもよい。
この構成によれば、特に耐電解液性に優れる電池用包装材料を提供することができる。 (5) Also, the battery packaging material of (2) is
The mass ratio of the composition containing the magnesium phosphate, magnesium oxide, and the organic amine to the composition containing the calcium phosphonate may be 1:2 to 2:1.
According to this structure, it is possible to provide a battery packaging material that is particularly excellent in electrolytic solution resistance.

（６）また、（３）の電池用包装材料は、
前記リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物と、前記リン酸亜鉛を含む組成物との質量比が、１：２〜２：１でもよい。
この構成によれば、特に耐電解液性に優れる電池用包装材料を提供することができる。 (6) Further, the battery packaging material of (3) is
The mass ratio of the composition containing the magnesium phosphate, magnesium oxide and the organic amine to the composition containing the zinc phosphate may be 1:2 to 2:1.
According to this structure, it is possible to provide a battery packaging material that is particularly excellent in electrolytic solution resistance.

また、本願発明の実施形態に係る電池は、
（７）（１）〜（６）のいずれかの電池用包装材料から形成された包装容器内に、少なくとも正極、負極、及び電解質を収容し、各電極からのリード線を外側に導出させた状態で周辺部をシールしてなる。
この構成によれば、耐電解液性に優れる電池を提供することができる。 Further, the battery according to the embodiment of the present invention,
(7) At least a positive electrode, a negative electrode, and an electrolyte were housed in a packaging container formed from the battery packaging material of any of (1) to (6), and lead wires from each electrode were led out to the outside. The peripheral part is sealed in this state.
With this configuration, it is possible to provide a battery having excellent electrolytic solution resistance.

［本発明の実施形態の詳細］
１．電池用包装材料
本発明の実施形態に係る電池用包装材料１は、少なくとも、基材樹脂層１１、金属層１３、及びシール樹脂層１４をこの順に有する積層体からなる。この積層体は、例えば、ヒートシールにより袋状の容器を形成し、又は深絞り成形によりカップ状やトレー状の容器を形成することができるシートである。図１に示すように、本実施形態の電池用包装材料１は、基材樹脂層１１と金属層１３との間に接着層１２を有していてもよい。電池の組み立て時に、電池素子の周縁に位置するシール樹脂層１４同士を熱溶着することにより電池素子が封止される。 [Details of the embodiment of the present invention]
1. Battery Packaging Material A battery packaging material 1 according to an embodiment of the present invention is a laminate having at least a base resin layer 11, a metal layer 13, and a sealing resin layer 14 in this order. This laminate is a sheet that can be formed into a bag-shaped container by heat sealing, or a cup-shaped or tray-shaped container by deep drawing. As shown in FIG. 1, the battery packaging material 1 of the present embodiment may have an adhesive layer 12 between the base resin layer 11 and the metal layer 13. At the time of assembling the battery, the battery element is sealed by heat-sealing the seal resin layers 14 located at the periphery of the battery element.

（１）基材樹脂層
本実施形態の電池用包装材料１において、基材樹脂層１１は最外層を形成する層である。基材樹脂層１１は、単層でも、２層以上の多層でもよい。基材樹脂層１１を多層構造にする場合、各層はそれぞれ異なる樹脂から形成されてもよい。多層構造の場合の各層は、接着剤を介して接着してもよく、また接着剤を介さず直接積層させてもよい。 (1) Base Resin Layer In the battery packaging material 1 of the present embodiment, the base resin layer 11 is a layer forming the outermost layer. The base resin layer 11 may be a single layer or a multilayer including two or more layers. When the base resin layer 11 has a multi-layer structure, each layer may be formed of a different resin. In the case of a multilayer structure, each layer may be adhered via an adhesive, or may be directly laminated without an adhesive.

基材樹脂層１１を形成する樹脂については、絶縁性を備えるものであることを限度として特に限定されないが、例えば、ポリエステル、ポリアミド、エポキシ樹脂、アクリル樹脂、フッ素樹脂、ポリウレタン及びこれらの混合物等が挙げられる。好ましくはポリエステル、ポリアミドが挙げられる。 The resin forming the base resin layer 11 is not particularly limited as long as it has an insulating property, and examples thereof include polyester, polyamide, epoxy resin, acrylic resin, fluororesin, polyurethane, and mixtures thereof. Can be mentioned. Preferred are polyester and polyamide.

ポリエステルとしては、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリブチレンナフタレート、共重合ポリエステル、ポリカーボネートが挙げられるが、これらに限定されない。ポリアミドとしては、例えば、ナイロン６、ナイロン６６、ナイロン６とナイロン６６との共重合体、ナイロン６１０、ポリメタキシリレンアジパミド（ＭＸＤ６）が挙げられるが、これらに限定されない。 Examples of the polyester include, but are not limited to, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, copolymerized polyester, and polycarbonate. Examples of the polyamide include, but are not limited to, nylon 6, nylon 66, a copolymer of nylon 6 and nylon 66, nylon 610, and polymethaxylylene adipamide (MXD6).

基材樹脂層１１は、１軸又は２軸延伸された樹脂フィルムで形成されていてもよく、また未延伸の樹脂フィルムで形成してもよい。延伸された樹脂フィルム、とりわけ２軸延伸された樹脂フィルムは、配向結晶化することにより耐熱性が向上しているので、基材樹脂層１１として好適に使用される。また、基材樹脂層１１は、上記の素材を金属層１３上にコーティングして形成されていてもよい。 The base resin layer 11 may be formed of a uniaxially or biaxially stretched resin film, or may be formed of an unstretched resin film. A stretched resin film, especially a biaxially stretched resin film, has improved heat resistance due to oriented crystallization, and thus is suitably used as the base resin layer 11. Further, the base resin layer 11 may be formed by coating the above-mentioned materials on the metal layer 13.

基材樹脂層１１の厚さは、通常５〜４０μｍ、好ましくは１０〜３５μｍ、より好ましくは１５〜３０μｍ程度である。基材樹脂層１１の厚みが薄すぎると、ピンホールが発生する恐れがある。 The thickness of the base resin layer 11 is usually 5 to 40 μm, preferably 10 to 35 μm, more preferably about 15 to 30 μm. If the base resin layer 11 is too thin, pinholes may occur.

本実施形態の電池用包装材料１において、接着層１２は、基材樹脂層１１と金属層１３とを接着させるために、必要に応じて設けられる層である。 In the battery packaging material 1 of the present embodiment, the adhesive layer 12 is a layer provided as necessary in order to bond the base resin layer 11 and the metal layer 13.

接着層１２は、基材樹脂層１１と金属層１３とを接着可能である接着剤によって形成される。接着層１２の形成に使用される接着剤は、２液硬化型接着剤であってもよく、また１液硬化型接着剤であってもよい。更に、接着層１２の形成に使用される接着剤の接着機構についても、特に制限されず、化学反応型、溶剤揮発型、熱溶融型、熱圧型等のいずれであってもよい。 The adhesive layer 12 is formed of an adhesive that can bond the base resin layer 11 and the metal layer 13. The adhesive used to form the adhesive layer 12 may be a two-component curable adhesive or a one-component curable adhesive. Further, the adhesive mechanism of the adhesive used to form the adhesive layer 12 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.

接着層１２の形成には、ポリエステル系、ポリエチレンイミン系、ポリエーテル系、シアノアクリレート系、ウレタン系、有機チタン系、ポリエーテルウレタン系、エポキシ系、ポリエステルポリウレタン系、イミド系、イソシアネート系、ポリオレフィン系、シリコーン系の各種接着剤を用いることができる。 The adhesive layer 12 is formed by a polyester type, polyethyleneimine type, polyether type, cyanoacrylate type, urethane type, organic titanium type, polyether urethane type, epoxy type, polyester polyurethane type, imide type, isocyanate type, polyolefin type. Various silicone adhesives can be used.

接着層１２の厚さは、通常２〜５０μｍ、好ましくは３〜２５μｍ程度である。 The thickness of the adhesive layer 12 is usually 2 to 50 μm, preferably about 3 to 25 μm.

（２）金属層
本実施形態の電池用包装材料１において、金属層１３は、包装材料の強度向上の他、電池内部に水蒸気、酸素、光等が侵入するのを防止するためのバリア層として機能する層である。金属層１３を形成する金属は、表面処理されていないアルミニウムである。ここでいう、表面処理とはアルミニウムの表面に酸化被膜や樹脂被膜等を形成する処理や表面積を広げる処理であり、例えば、硝酸クロム、フッ化クロム、硫酸クロム、酢酸クロム等のクロム酸化合物を用いたクロム酸クロメート処理；リン酸ナトリウム、リン酸カリウム等のリン酸化合物を用いたリン酸クロメート処理；ベーマイト処理；有機酸を含む物質による化成処理；又は粗面化処理等を指す。 (2) Metal Layer In the battery packaging material 1 of the present embodiment, the metal layer 13 serves as a barrier layer for preventing the entry of water vapor, oxygen, light, etc. into the battery in addition to improving the strength of the packaging material. It is a functional layer. The metal forming the metal layer 13 is aluminum that has not been surface-treated. Here, the surface treatment is a treatment for forming an oxide coating or a resin coating on the surface of aluminum or a treatment for expanding the surface area, and for example, a chromic acid compound such as chromium nitrate, chromium fluoride, chromium sulfate, chromium acetate, etc. Chromate chromate treatment used; phosphoric acid chromate treatment using a phosphoric acid compound such as sodium phosphate and potassium phosphate; boehmite treatment; chemical conversion treatment with a substance containing an organic acid; or roughening treatment.

金属層１３の厚さは、通常１０〜２００μｍ、好ましくは２０〜１００μｍ程度である。 The thickness of the metal layer 13 is usually 10 to 200 μm, preferably 20 to 100 μm.

（３）シール樹脂層
本実施形態の電池用包装材料１において、シール樹脂層１４は、最内層に該当し、電池の組み立て時にシール樹脂層１４同士が熱溶着して電池素子を密封する層である。シール樹脂層１４は、単層でも、２層以上の多層でもよい。シール樹脂層１４を多層構造にする場合、各層はそれぞれ異なる樹脂から形成されてもよい。多層構造の場合の各層は、接着剤を介して接着してもよく、また接着剤を介さず直接積層させてもよい。シール樹脂層１４は、金属層１３に直接貼り合されている。 (3) Seal Resin Layer In the battery packaging material 1 of the present embodiment, the seal resin layer 14 corresponds to the innermost layer, and is a layer that seals the battery element by heat welding the seal resin layers 14 to each other during battery assembly. is there. The seal resin layer 14 may be a single layer or a multilayer of two or more layers. When the sealing resin layer 14 has a multi-layer structure, each layer may be formed of a different resin. In the case of a multilayer structure, each layer may be adhered via an adhesive, or may be directly laminated without an adhesive. The seal resin layer 14 is directly attached to the metal layer 13.

シール樹脂層１４を構成する樹脂としては、ポリオレフィン、酸変性ポリオレフィン及びこれらの混合物等が挙げられる。ポリオレフィンとしては、低密度、中密度、高密度ポリエチレン、直鎖状低密度ポリエチレン、ホモポリプロピレン及びプロピレンとエチレン又は他のαオレフィンとのランダム又はブロック共重合体等が挙げられる。酸変性ポリオレフィンとは、カルボン酸により上記のポリオレフィンを変性したものである。変性に使用されるカルボン酸としては、マレイン酸、アクリル酸、イタコン酸、クロトン酸、無水マレイン酸などが挙げられる。上記の中でも、酸変性ポリオレフィンが好ましく、酸変性ポリプロピレンがより好ましい。 Examples of the resin forming the seal resin layer 14 include polyolefin, acid-modified polyolefin, and a mixture thereof. Examples of the polyolefin include low density, medium density, high density polyethylene, linear low density polyethylene, homopolypropylene, and random or block copolymer of propylene and ethylene or other α-olefin. The acid-modified polyolefin is a product obtained by modifying the above polyolefin with a carboxylic acid. Examples of the carboxylic acid used for modification include maleic acid, acrylic acid, itaconic acid, crotonic acid, and maleic anhydride. Among the above, acid-modified polyolefin is preferable, and acid-modified polypropylene is more preferable.

シール樹脂層１４のうちの金属層１３に接触している層は、リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物（以下、組成物（１）とする。）を含有する。この特定の組成物を含有することで、電解液と接触することによるシール樹脂層１４の金属層１３からの剥離を抑制することができる。 The layer of the seal resin layer 14 that is in contact with the metal layer 13 contains a composition containing magnesium phosphate, magnesium oxide, and an organic amine (hereinafter referred to as composition (1)). By containing this specific composition, peeling of the seal resin layer 14 from the metal layer 13 due to contact with the electrolytic solution can be suppressed.

前述の金属層１３に接触している層は、組成物（１）を３質量％〜８質量％の割合で含有するとよい。これによれば、金属層１３を表面処理しなくてもシール樹脂層１４が金属層１３からより剥離しにくくなる。組成物（１）の含有量が３質量％未満であると、剥離が生じるおそれがあり、８質量％より多いと当該層の見た目や強度に悪影響を及ぼすおそれがあり好ましくない。 The layer in contact with the metal layer 13 described above may contain the composition (1) in a proportion of 3% by mass to 8% by mass. According to this, even if the metal layer 13 is not surface-treated, the seal resin layer 14 becomes more difficult to peel from the metal layer 13. When the content of the composition (1) is less than 3% by mass, peeling may occur, and when it exceeds 8% by mass, appearance and strength of the layer may be adversely affected, which is not preferable.

また、組成物（１）は、リン酸マグネシウムを５質量％〜６５質量％、酸化マグネシウムを５質量％〜５０質量％、有機アミンを３質量％〜５０質量％の割合で含有することが好ましく、リン酸マグネシウム、酸化マグネシウム及び有機アミンを合計で９９質量％以上の割合で含有することが好ましい。有機アミンには、複素環式アミンやアルコール基含有アミンが挙げられる。複素環式アミンには、モルホリン、ヘキサメチレンテトラミン、トリエノールアミンなどが挙げられる。 The composition (1) preferably contains magnesium phosphate in an amount of 5% by mass to 65% by mass, magnesium oxide in an amount of 5% by mass to 50% by mass, and an organic amine in an amount of 3% by mass to 50% by mass. , Magnesium phosphate, magnesium oxide and organic amine are preferably contained in a proportion of 99% by mass or more in total. Examples of organic amines include heterocyclic amines and alcohol group-containing amines. Heterocyclic amines include morpholine, hexamethylenetetramine, trienolamine and the like.

また、前述の金属層１３に接触している層は、組成物（１）と併せて、ホスホン酸カルシウムを含む組成物（以下、組成物（２）とする。）を含有してもよい。この特定の組成物をさらに含有することで、電解液と接触することによるシール樹脂層１４と金属層１３との剥離をより抑制することができる。 In addition, the layer in contact with the metal layer 13 may include a composition containing calcium phosphonate (hereinafter, referred to as composition (2)) in addition to the composition (1). By further containing this specific composition, peeling between the seal resin layer 14 and the metal layer 13 due to contact with the electrolytic solution can be further suppressed.

組成物（２）はホスホン酸カルシウム以外にＳｉＯ２、ＣａＳｉＯ３、ＣａＣＯ３を含んでもよい。この場合、組成物（２）は、ＣａＨＯ３Ｐ（ホスホン酸カルシウム）を１質量％〜３０質量％、好ましくは５質量％〜１５質量％、ＳｉＯ２を１質量％〜３０質量％、好ましくは５質量％〜１５質量％、ＣａＳｉＯ３を１質量％〜３０質量％、好ましくは５質量％〜１５質量％、ＣａＣＯ３を１０質量％〜９７質量％、好ましくは５５質量％〜８５質量％の質量比で含有するとよい。 The composition (2) may contain SiO 2 , CaSiO 3 , or CaCO 3 in addition to calcium phosphonate. In this case, the composition (2) contains CaHO 3 P (calcium phosphonate) at 1% by mass to 30% by mass, preferably 5% by mass to 15% by mass, and SiO 2 at 1% by mass to 30% by mass, preferably 5% by mass to 15% by mass, CaSiO 3 at 1% by mass to 30% by mass, preferably 5% by mass to 15% by mass, CaCO 3 at 10% by mass to 97% by mass, preferably 55% by mass to 85% by mass. It may be contained in a mass ratio.

また、この場合、組成物（１）と組成物（２）の質量比は１：２〜２：１であることが好ましい。 Further, in this case, the mass ratio of the composition (1) and the composition (2) is preferably 1:2 to 2:1.

また、前述の金属層１３に接触している層は、組成物（１）と併せて、リン酸亜鉛を含む組成物（以下、組成物（３）とする。）を含有してもよい。この特定の組成物をさらに含有することで、電解液と接触することによるシール樹脂層１４と金属層１３との剥離をより抑制することができる。 In addition, the layer in contact with the metal layer 13 may include a composition containing zinc phosphate (hereinafter, referred to as a composition (3)) in addition to the composition (1). By further containing this specific composition, peeling between the seal resin layer 14 and the metal layer 13 due to contact with the electrolytic solution can be further suppressed.

組成物（３）は、リン酸亜鉛以外にＳｉＯ２、ＣａＳｉＯ３、ＣａＣＯ３を含んでもよい。この場合、組成物（３）は、Ｚｎ３（ＰＯ４）２（リン酸亜鉛）を１０質量％〜９７質量％、好ましくは７０質量％〜９７質量％、ＳｉＯ２を１質量％〜３０質量％、好ましくは１質量％〜１０質量％、ＣａＳｉＯ３を１質量％〜３０質量％、好ましくは１質量％〜１０質量％、ＣａＣＯ３を１質量％〜３０質量％好ましくは１質量％〜１０質量％の質量比で含有するとよい。 The composition (3) may contain SiO 2 , CaSiO 3 , or CaCO 3 in addition to zinc phosphate. In this case, the composition (3) contains Zn 3 (PO 4 ) 2 (zinc phosphate) at 10% by mass to 97% by mass, preferably 70% by mass to 97% by mass, and SiO 2 at 1% by mass to 30% by mass. %, preferably 1% by mass to 10% by mass, CaSiO 3 at 1% by mass to 30% by mass, preferably 1% by mass to 10% by mass, CaCO 3 at 1% by mass to 30% by mass, preferably 1% by mass to 10% by mass. It may be contained at a mass ratio of mass %.

また、この場合、組成物（１）と組成物（３）の質量比は１：２〜２：１であることが好ましい。 Further, in this case, the mass ratio of the composition (1) and the composition (3) is preferably 1:2 to 2:1.

そして、シール樹脂層１４のうちの金属層１３に接触している層は、組成物（１）と併せて、組成物（２）及び組成物（３）の両方を含有してもよい。この場合、組成物（１）と組成物（２）の質量比は１：２〜２：１、組成物（１）と組成物（３）の質量比は１：２〜２：１であることが好ましい。 The layer of the seal resin layer 14 that is in contact with the metal layer 13 may include both the composition (2) and the composition (3) in addition to the composition (1). In this case, the mass ratio of the composition (1) and the composition (2) is 1:2 to 2:1, and the mass ratio of the composition (1) and the composition (3) is 1:2 to 2:1. It is preferable.

なお、シール樹脂層１４のうちの金属層１３に接触している層以外の層が、前述の組成物（１）〜組成物（３）を含有していてもよい。 The layers of the seal resin layer 14 other than the layer in contact with the metal layer 13 may contain the above-mentioned composition (1) to composition (3).

シール樹脂層１４の厚みは、通常３〜４０μｍ、好ましくは２０〜４０μｍ程度である。また、シール樹脂層には、必要に応じて、無機フィラー、可塑剤、熱安定剤、光安定剤、撥水剤、吸水剤、滑材、カップリング剤、顔料、染料などの各種添加剤を配合することができる。 The thickness of the seal resin layer 14 is usually 3 to 40 μm, preferably about 20 to 40 μm. In addition, the seal resin layer, if necessary, various additives such as inorganic fillers, plasticizers, heat stabilizers, light stabilizers, water repellents, water absorbing agents, lubricants, coupling agents, pigments, dyes, etc. It can be blended.

２．電池
本実施形態の電池は、本実施形態の電池用包装材料を用いて形成した包装容器内に、正極、負極、電解質などの電池素子を収容し、各電極からのリード線を開口部から外側に導出させた状態で、該開口部をヒートシールした構造を有するものである。 2. Battery In the battery of the present embodiment, a battery container such as a positive electrode, a negative electrode, and an electrolyte is housed in a packaging container formed by using the battery packaging material of the present embodiment, and the lead wires from each electrode are outside from the opening. It has a structure in which the opening is heat-sealed in the state of being led out.

図２に示すように、本実施形態の電池用包装材料１を２枚貼り合わせ、一辺に開口部を設けるように周縁部をヒートシールして包装容器を形成し、包装容器の内部に電池素子を収容して、各電極からのリード線２２を開口部から外側に導出させた状態で、該開口部をヒートシールすることで、本実施形態の電池２を作製することができる。また、本実施形態の電池用包装材料１と、当該包装材料１の周縁部以外を凹型にした電池用包装材料１０１とを用いて、図４に示す形状の電池１０２を作製することもできる。さらに、本実施形態の電池用包装材料１の１枚を折りたたんで使用して、図５に示す形状の電池２０２を作製することもできる。 As shown in FIG. 2, two pieces of the battery packaging material 1 of the present embodiment are stuck together, and a peripheral edge portion is heat-sealed to form an opening portion on one side to form a packaging container. The battery 2 of the present embodiment can be manufactured by accommodating the above and heat-sealing the lead wire 22 from each electrode to the outside through the opening. Further, by using the battery packaging material 1 of the present embodiment and the battery packaging material 101 having a concave shape other than the peripheral portion of the packaging material 1, the battery 102 having the shape shown in FIG. 4 can be manufactured. Further, by folding and using one sheet of the battery packaging material 1 of the present embodiment, the battery 202 having the shape shown in FIG. 5 can be manufactured.

本実施形態の電池は、一次電池、二次電池のいずれでもあり得る。特に二次電池である場合、例えば、リチウムイオン電池、リチウムイオンポリマー電池、鉛畜電池、ニッケル・水素畜電池、ニッケル・カドミウム畜電池、ニッケル・鉄畜電池、ニッケル・亜鉛畜電池、酸化銀・亜鉛畜電池、金属空気電池、多価カチオン電池、コンデンサー、キャパシタ等であり得る。 The battery of this embodiment may be either a primary battery or a secondary battery. Particularly in the case of a secondary battery, for example, a lithium ion battery, a lithium ion polymer battery, a lead storage battery, a nickel/hydrogen storage battery, a nickel/cadmium storage battery, a nickel/iron storage battery, a nickel/zinc storage battery, silver oxide/ It can be a zinc battery, a metal-air battery, a polyvalent cation battery, a capacitor, a capacitor and the like.

次に発明を実施するための形態を実施例により説明する。実施例は本発明の範囲を限定するものではない。 Next, modes for carrying out the invention will be described by way of examples. The examples do not limit the scope of the invention.

（例１）
厚さ４０μｍのアルミニウム箔に、基材樹脂層としてナイロン６を用いて形成された厚み２５μｍの延伸フィルムをドライラミネーション法により貼り合わせて多層シートを作製した。接着剤の厚みは、４μｍであった。アルミニウム箔には、表面処理を施さなかった。
次に、押出成型により、酸変性ランダムポリプロピレンを主成分とし、総質量に対してリン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を５質量％の割合で含有するシール樹脂層を作製した。当該リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物としては、リン酸マグネシウムを５９質量％、酸化マグネシウムを３６質量％、有機アミンを４質量％の割合で含有する組成物を使用した。
前記多層シートのアルミニウム箔面とシール樹脂層とを対向させて、熱ラミネーション法により電池用包装材料を作成した。シール樹脂層の厚みは３５μｍであり、全体の厚みは約１０５μｍであった。 (Example 1)
A 25 μm-thick stretched film formed by using nylon 6 as a base resin layer was laminated on a 40 μm-thick aluminum foil by a dry lamination method to prepare a multilayer sheet. The thickness of the adhesive was 4 μm. No surface treatment was applied to the aluminum foil.
Next, by extrusion molding, a sealing resin layer containing an acid-modified random polypropylene as a main component and containing 5% by mass of a composition containing magnesium phosphate, magnesium oxide and an organic amine with respect to the total mass was prepared. As the composition containing magnesium phosphate, magnesium oxide and an organic amine, a composition containing 59 mass% magnesium phosphate, 36 mass% magnesium oxide and 4 mass% organic amine was used.
The aluminum foil surface of the multilayer sheet and the sealing resin layer were opposed to each other to prepare a battery packaging material by the thermal lamination method. The thickness of the sealing resin layer was 35 μm, and the total thickness was about 105 μm.

（例２）
シール樹脂層として、酸変性ランダムポリプロピレンを主成分とし、総質量に対してリン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を４質量％、ホスホン酸カルシウムを含む組成物を２質量％の割合で含有する樹脂を用いた以外は、例１と同様である電池用包装材料を作成した。当該ホスホン酸カルシウムを含む組成物としては、ＣａＨＯ３Ｐを１０質量％、ＳｉＯ２を１０質量％、ＣａＳｉＯ３を１０質量％、ＣａＣＯ３を７０質量％の割合で含有する組成物を使用した。 (Example 2)
As the sealing resin layer, a composition containing acid-modified random polypropylene as a main component and containing magnesium phosphate, magnesium oxide and an organic amine in an amount of 4% by mass and a composition containing calcium phosphonate in an amount of 2% by mass based on the total mass. A battery packaging material was prepared in the same manner as in Example 1 except that the resin contained in 2 was used. As the composition containing the calcium phosphonate, a composition containing 10% by mass of CaHO 3 P, 10% by mass of SiO 2 , 10% by mass of CaSiO 3 , and 70% by mass of CaCO 3 was used.

（例３）
シール樹脂層として、酸変性ランダムポリプロピレンを主成分とし、総質量に対してリン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を３質量％、ホスホン酸カルシウムを含む組成物を３質量％の割合で含有する樹脂を用いた以外は、例２と同様である電池用包装材料を作成した。 (Example 3)
As the seal resin layer, a composition containing acid-modified random polypropylene as a main component and containing magnesium phosphate, magnesium oxide and an organic amine in an amount of 3% by mass and a composition containing calcium phosphonate in an amount of 3% by mass based on the total mass. A battery packaging material was prepared in the same manner as in Example 2 except that the resin contained in 2 was used.

（例４）
シール樹脂層として、酸変性ランダムポリプロピレンを主成分とし、総質量に対してリン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を３質量％、リン酸亜鉛を含む組成物を３質量％の割合で含有する樹脂を用いた以外は、例１と同様である電池用包装材料を作成した。当該リン酸亜鉛を含む組成物としては、Ｚｎ３（ＰＯ４）２を８０質量％、ＳｉＯ２を５質量％、ＣａＳｉＯ３を５質量％、ＣａＣＯ３を１０質量％の割合で含有する組成物を使用した。 (Example 4)
As the sealing resin layer, a composition containing acid-modified random polypropylene as a main component and containing magnesium phosphate, magnesium oxide and an organic amine in an amount of 3% by mass and a composition including zinc phosphate in an amount of 3% by mass based on the total mass. A battery packaging material was prepared in the same manner as in Example 1 except that the resin contained in 2 was used. Compositions containing the zinc phosphate, Zn 3 (PO 4) 2 to 80 wt%, a SiO 2 5% by weight, CaSiO 3 to 5 wt%, a composition containing a proportion of CaCO 3 10% by weight It was used.

（例５）
シール樹脂層として、酸変性ランダムポリプロピレンから成る樹脂を用いた以外は、例１と同様である電池用包装材料を作成した。 (Example 5)
A battery packaging material similar to that of Example 1 was prepared except that a resin made of acid-modified random polypropylene was used as the sealing resin layer.

（剥離性評価）
作製した電池用包装材料（例１〜例５）を横８ｃｍ×縦８ｃｍのシート片に切り出し、このシート片を縦方向に二つ折りにして、対向する２辺を１ｃｍ幅でシールして、開口部を有する包装体を作製した。この包装体に、以下の電解液を充填して開口部を０．５ｃｍ幅で密封シールしてから所定時間経過後、１８０度ピール試験を行った。電解液として、リチウムイオン二次電池の電解液に利用されているものを用意した。ここでは、電解質がＬｉＰＦ６（電解質のモル濃度１ｍｏｌ／Ｌ）、溶媒がＥＣ：ＤＭＣ：ＤＥＣ＝１：１：１（Ｖ／Ｖ）の混合有機溶媒であるもの（キシダ化学株式会社製電解液）を用意した。Ｖ／Ｖは、体積比を意味する。恒温槽を利用して、電解液の温度を６５℃に維持した。 (Peelability evaluation)
The produced battery packaging material (Examples 1 to 5) is cut into a sheet piece measuring 8 cm in width and 8 cm in length, the sheet piece is folded in two in the longitudinal direction, and the opposite two sides are sealed with a width of 1 cm and opened. A package having parts was produced. This package was filled with the following electrolytic solution, and the opening was hermetically sealed with a width of 0.5 cm, and after a lapse of a predetermined time, a 180-degree peel test was performed. As an electrolytic solution, one used as an electrolytic solution for a lithium ion secondary battery was prepared. Here, the electrolyte is LiPF6 (electrolyte molar concentration 1 mol/L) and the solvent is a mixed organic solvent of EC:DMC:DEC=1:1:1 (V/V) (electrolysis solution manufactured by Kishida Chemical Co., Ltd.). Prepared. V/V means volume ratio. The temperature of the electrolytic solution was maintained at 65° C. using a constant temperature bath.

所定時間経過後、包装体の開口部のシール部を切断して電解液を取り除き、包装体を横１ｃｍ、縦５ｃｍのシート片に切り出して、縦方向末端のシール樹脂層をアルミニウムから少しだけ剥がし、つかみしろを確保した。そして、引張試験装置に把持して、互いに反対方向に引っ張り、シール樹脂層とアルミニウムの１８０度剥離強度を測定した。また、電解液に浸漬させていない包装材料の、シール樹脂層とアルミニウムの１８０度剥離強度も測定した。 After a lapse of a predetermined time, the sealing part at the opening of the package is cut to remove the electrolytic solution, the package is cut into a sheet piece having a width of 1 cm and a length of 5 cm, and the sealing resin layer at the longitudinal end is slightly peeled from aluminum. , Secured the grip. Then, it was gripped by a tensile tester and pulled in opposite directions, and the 180-degree peel strength between the seal resin layer and aluminum was measured. In addition, the 180-degree peel strength between the sealing resin layer and aluminum of the packaging material that was not immersed in the electrolytic solution was also measured.

長さ２０ｍｍ剥がす時の最大強度（単位Ｎ）をアルミニウムの幅で割った値（単位はＮ／ｃｍ）を剥離強度として算出し、これが１５以上のものをＡ、５以上１５未満のものをＢ、５未満のものをＣとした。また、密着が強く、剥離試験で材料が破壊されてしまったものは材破と表現した。結果を表１に示す。 A value (unit: N/cm) obtained by dividing the maximum strength (unit N) when peeling off a length of 20 mm by the width of aluminum was calculated as the peel strength. A value of 15 or more was A, and a value of 5 or more and less than 15 was B. A value of less than 5 was designated as C. In addition, a material having a strong adhesion and the material being destroyed in the peeling test was expressed as a material failure. The results are shown in Table 1.

Figure 0006747237
Figure 0006747237

例１〜例４では、剥離強度が強く、電解液との接触による密着性の低下が抑制されているとわかる。これに対し、例５においては電解液と接触させることにより剥離強度が弱くなり、層間の密着性が低下していることがわかる。 In Examples 1 to 4, it can be seen that the peel strength is high and the decrease in adhesion due to contact with the electrolytic solution is suppressed. On the other hand, in Example 5, it can be seen that the peel strength is weakened and the adhesion between the layers is lowered by contact with the electrolytic solution.

これらの結果より、本実施形態の樹脂フィルムを使用した電池用包装材料は、表面処理を施していないアルミニウムを使用していても、電解液との接触による樹脂フィルムの剥離を抑制することができ、良好な耐電解液性を有することがわかる。 From these results, the battery packaging material using the resin film of the present embodiment can suppress the peeling of the resin film due to contact with the electrolytic solution, even when using aluminum that has not been surface-treated. It can be seen that it has good electrolytic solution resistance.

１，１０１：電池用包装材料
１１：基材樹脂層
１２：接着層
１３：金属層
１４：シール樹脂層
２，１０２，２０２：電池
２１：リード線

1, 101: Battery packaging material 11: Base resin layer 12: Adhesive layer 13: Metal layer 14: Seal resin layer 2, 102, 202: Battery 21: Lead wire

Claims (6)

少なくとも、基材樹脂層、金属層、及びシール樹脂層をこの順で含む積層体からなる電池用包装材料であって、
前記金属層が表面処理されていないアルミニウムからなり、
前記シール樹脂層が前記金属層に直接貼り合されており、
前記シール樹脂層が１以上の層を有し、
前記１以上の層のうちの前記金属層に接触する層が、リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物を、３質量％以上８質量％以下の割合で含有する、電池用包装材料。 At least a base material resin layer, a metal layer, and a battery packaging material consisting of a laminate including a sealing resin layer in this order,
The metal layer is made of aluminum that is not surface-treated,
The seal resin layer is directly bonded to the metal layer,
The sealing resin layer has one or more layers,
The battery packaging material, wherein one of the one or more layers, which is in contact with the metal layer, contains a composition containing magnesium phosphate, magnesium oxide, and an organic amine in a proportion of 3% by mass or more and 8% by mass or less. .. 前記金属層に接触する層が、さらにホスホン酸カルシウムを含む組成物を含有する、請求項１に記載の電池用包装材料。 The battery packaging material according to claim 1, wherein the layer in contact with the metal layer further contains a composition containing calcium phosphonate. 前記金属層に接触する層が、さらにリン酸亜鉛を含む組成物を含有する、請求項１又は請求項２に記載の電池用包装材料。 The packaging material for a battery according to claim 1 or 2, wherein the layer in contact with the metal layer further contains a composition containing zinc phosphate . 前記リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物と、前記ホスホン酸カルシウムを含む組成物との質量比が、１：２〜２：１である、請求項２に記載の電池用包装材料。 The battery packaging material according to claim 2, wherein a mass ratio of the composition containing the magnesium phosphate, magnesium oxide and the organic amine and the composition containing the calcium phosphonate is 1:2 to 2:1. .. 前記リン酸マグネシウム、酸化マグネシウム及び有機アミンを含む組成物と、前記リン酸亜鉛を含む組成物との質量比が、１：２〜２：１である、請求項３に記載の電池用包装材料。 The packaging material for a battery according to claim 3, wherein a mass ratio of the composition containing the magnesium phosphate, magnesium oxide and the organic amine and the composition containing the zinc phosphate is 1:2 to 2:1. .. 請求項１〜請求項５のいずれか一項に記載の電池用包装材料から形成された包装容器内に、少なくとも正極、負極、及び電解質を収容し、各電極からのリード線を外側に導出させた状態で周辺部をシールしてなる、電池。 At least a positive electrode, a negative electrode, and an electrolyte are accommodated in a packaging container formed from the battery packaging material according to any one of claims 1 to 5 , and lead wires from each electrode are led out to the outside. A battery that is made by sealing the peripheral part in the closed state.
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