JP2007173049A - Lamination sheath material for battery and laminated cell - Google Patents

Lamination sheath material for battery and laminated cell Download PDF

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JP2007173049A
JP2007173049A JP2005369446A JP2005369446A JP2007173049A JP 2007173049 A JP2007173049 A JP 2007173049A JP 2005369446 A JP2005369446 A JP 2005369446A JP 2005369446 A JP2005369446 A JP 2005369446A JP 2007173049 A JP2007173049 A JP 2007173049A
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battery
film
packaging material
outer packaging
base film
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JP2005369446A
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JP5209847B2 (en
Inventor
Kazuto Hatta
一人 八田
Masahito Sato
雅人 佐藤
Takeshi Sugiyama
毅 杉山
Hiroyuki Yamada
弘幸 山田
Tadashi Miehori
正 三重堀
Koji Minamitani
広治 南谷
Hiroshi Hata
浩 畑
Koji Miyano
幸治 宮野
Atsushi Tanigawa
淳 谷川
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Sony Corp
Resonac Packaging Corp
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Showa Denko Packaging Co Ltd
Sony Corp
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Priority to JP2005369446A priority Critical patent/JP5209847B2/en
Application filed by Showa Denko Packaging Co Ltd, Sony Corp filed Critical Showa Denko Packaging Co Ltd
Priority to CN2006800485148A priority patent/CN101346831B/en
Priority to US12/158,548 priority patent/US8323827B2/en
Priority to KR1020087015025A priority patent/KR101325345B1/en
Priority to DE112006003517T priority patent/DE112006003517T5/en
Priority to PCT/JP2006/324962 priority patent/WO2007072736A1/en
Priority to TW095147501A priority patent/TWI399877B/en
Publication of JP2007173049A publication Critical patent/JP2007173049A/en
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    • 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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  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamination sheath material for a battery that can be easily and surely adhered to a battery main body and can be firmly adhered even to a plastic component for reinforcement of end parts, without the use of a separate adhesive tape or a hot-melt adhesive. <P>SOLUTION: A metal foil 2 is pasted on one face of a base film 1, and a coated film layer 4 made of thermally adhesive resin with a softening point of not more than 160°C capable of thermally adhering to a surface film of the battery main body is formed on the other face of the base film 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、携帯電話、ノートパソコン、デジタルカメラ等のモバイル電気機器の電源に使用される電池の本体を包むラミネート外装材と、このラミネート外装材を用いたラミネート電池に関する。   The present invention relates to a laminate exterior material that wraps a battery body used for a power source of a mobile electric device such as a mobile phone, a notebook computer, and a digital camera, and a laminate battery using the laminate exterior material.

なお、この明細書及び特許請求の範囲において、「アルミ」という語は、純アルミニウムとアルミニウム合金を含むものとする。   In this specification and claims, the term “aluminum” includes pure aluminum and aluminum alloys.

近年、モバイル電気機器の小型化、軽量化に伴い、これらに搭載されるリチウムイオン電池やリチウムポリマー電池についても、その外装材として旧来の金属缶に代えて、厚さ２０〜１００μｍ程度のアルミ箔の両面にプラスチックフィルムを張り合わせたラミネート外装材を使用することで軽量化が図られている。   In recent years, with the reduction in size and weight of mobile electrical devices, lithium-ion batteries and lithium polymer batteries mounted on them have an aluminum foil having a thickness of about 20 to 100 μm as an exterior material instead of a conventional metal can. Weight reduction is achieved by using a laminate exterior material in which a plastic film is laminated on both sides.

ところが、このラミネート外装材は、プレス成形による型付けができるように、焼鈍で軟化させた軟質アルミ箔を使用するので、材料強度が弱くなり、外部からの衝撃で破れたり、ピンホールが発生し易いという欠点がある。このため、従来のラミネート外装材を使用したラミネート電池では、外装の強度を補う目的でプラスチックの射出成形容器に装填されることが多いが（特許文献１参照）、その結果として電池単位の重量が増すと共に部品点数も多くなってしまう。   However, this laminate outer material uses soft aluminum foil that has been annealed and softened so that it can be molded by press molding, so the material strength becomes weak, and it is easy to break by external impact or to generate pinholes. There is a drawback. For this reason, in a laminated battery using a conventional laminated exterior material, it is often loaded in a plastic injection molded container for the purpose of supplementing the strength of the exterior (see Patent Document 1). As a result, the weight of the battery unit is increased. As the number increases, the number of parts increases.

そこで最近では、電池本体に、焼鈍していない硬質アルミ箔、もしくはその片面又は両面にプラスチックフィルムを貼着したものを巻き付けると共に、両端部にプラスチック部品を嵌め込んで補強する方法が登場している。
特開平１１−１８５７２８号公報 Therefore, recently, a method has been introduced in which a hard aluminum foil that has not been annealed or a plastic film attached to one or both sides of the battery body is wrapped around the battery body, and plastic parts are fitted to both ends for reinforcement. .
JP-A-11-185728

しかしながら、硬質アルミ箔は材料強度が強過ぎて曲げ加工や型付けを行った際に元の状態に戻り易いため、電池本体に巻き付けた上から粘着テープで止めたり、電池本体とアルミ箔との間に、両面粘着テープを介在させて圧着したり、ホットメルト接着剤の融液やフィルムを介在させて熱接着する必要があった。従って、前記方法では、電池外装の構成要素が多くなる上、粘着テープやホットメルト接着剤の供給・接着機構の組み込みにより、電池製造ラインが複雑化すると共に設備コストも増大するという問題があった。   However, since hard aluminum foil is too strong, it can easily return to its original state when bent or molded, so it can be wrapped around the battery body with an adhesive tape or between the battery body and aluminum foil. In addition, it is necessary to perform pressure bonding with a double-sided pressure-sensitive adhesive tape interposed therebetween, or to perform heat bonding with a melt or film of a hot melt adhesive. Therefore, in the above method, there are problems that the number of components of the battery exterior increases, and that the battery production line becomes complicated and the equipment cost increases due to the supply of adhesive tape and hot melt adhesive / incorporation mechanism. .

この発明は、上述の事情に鑑みて、電池用ラミネート外装材として、別途に粘着テープやホットメルト接着剤を使用することなく、電池本体への接着を容易に且つ確実に行え、端部補強用のプラスチック部品を用いる場合でも当該部品に対して強固に接着できるものを提供し、もってラミネート電池の部品数を少なくすると共に、電池製造ラインの簡素化を可能にすることを目的としている。   In view of the above circumstances, the present invention can easily and reliably adhere to a battery body without using a separate adhesive tape or hot melt adhesive as a battery laminate exterior material. It is an object of the present invention to provide a plastic part that can be firmly bonded to the part, thereby reducing the number of parts of the laminated battery and simplifying the battery production line.

上記目的を達成するために、この発明の請求項１に係る電池用ラミネート外装材は、ベースフィルムの一面側に金属箔が貼着されると共に、該ベースフィルムの他面側に、電池本体の表面フィルムに対して熱接着可能な軟化点１６０℃以下の熱接着性樹脂からなる塗膜層が形成されてなるものとしている。   In order to achieve the above object, the battery laminate outer material according to claim 1 of the present invention has a metal foil adhered to one surface side of the base film, and a battery main body on the other surface side of the base film. A coating layer made of a heat-adhesive resin having a softening point of 160 ° C. or lower that can be thermally bonded to the surface film is formed.

請求項２の発明は、上記請求項１の電池用ラミネート外装材において、上記塗膜層の熱接着性樹脂がエチレン−酢酸ビニル共重合体である構成としている。   According to a second aspect of the present invention, in the battery laminate outer material of the first aspect, the thermal adhesive resin of the coating layer is an ethylene-vinyl acetate copolymer.

請求項３の発明は、上記請求項１又は２の電池用ラミネート外装材において、上記塗膜層の厚さが０．５〜１０μｍである構成としている。   According to a third aspect of the present invention, in the laminate outer packaging material for a battery according to the first or second aspect, the thickness of the coating layer is 0.5 to 10 μm.

請求項４の発明は、上記請求項１〜３のいずれかの電池用ラミネート外装材において、ベースフィルムがラミネート電池の端部補強用プラスチック部品に対して熱接着可能な熱可塑性樹脂からなる構成としている。   According to a fourth aspect of the present invention, in the laminate outer packaging material for a battery according to any one of the first to third aspects, the base film is made of a thermoplastic resin that can be thermally bonded to a plastic part for reinforcing an end portion of the laminated battery. Yes.

請求項５の発明は、上記請求項１〜４のいずれかの電池用ラミネート外装材において、金属箔のベースフィルム貼着側とは反対側の表面に、厚さ８〜４０μｍの延伸フィルムが貼着されてなるものとしている。   According to a fifth aspect of the present invention, in the battery laminate outer material according to any one of the first to fourth aspects, a stretched film having a thickness of 8 to 40 μm is affixed to the surface of the metal foil opposite to the base film affixing side. It is supposed to be worn.

請求項６の発明は、上記請求項１〜４のいずれかの電池用ラミネート外装材において、金属箔のベースフィルム貼着側とは反対側の表面に、厚さ０．５〜５μｍの熱硬化樹脂層が形成されてなるものとしている。   A sixth aspect of the present invention is the battery laminate outer material according to any one of the first to fourth aspects, wherein the metal foil has a thickness of 0.5 to 5 μm on the surface opposite to the base film attachment side. It is assumed that a resin layer is formed.

請求項７の発明は、上記請求項１〜６のいずれかの電池用ラミネート外装材において、金属箔が硬質アルミ箔からなる構成を採用している。   The invention of claim 7 employs a configuration in which the metal foil is made of a hard aluminum foil in the laminate outer packaging material for a battery according to any one of claims 1 to 6.

また、この発明の請求項８に係るラミネート電池は、電池本体に前記請求項１〜７のいずれかに記載の電池用ラミネート外装材が前記塗膜層側で接して巻付けられて熱接着されると共に、電池本体の両側にはみ出た該ラミネート外装材の余剰部分で構成される各筒状部に、端部補強用プラスチック部品が少なくとも一部を挿嵌して該ラミネート外装材のベースフィルムに熱接着されてなるものとしている。   In the laminated battery according to claim 8 of the present invention, the battery laminate exterior material according to any one of claims 1 to 7 is wound on the battery body in contact with the coating layer side and is thermally bonded. At the same time, at least a part of the end-reinforcing plastic part is inserted into each cylindrical part composed of the surplus portion of the laminate exterior material that protrudes on both sides of the battery body to form the base film of the laminate exterior material. It is supposed to be heat bonded.

なお、硬質アルミ箔とは、加工（圧延）を施して加工硬化させた状態のアルミ箔を意味し、例えば、加工硬化上がりの箔、加工硬化後に適度な熱処理を施した箔等が挙げられ、一般的にＪＩＳ規格（ＪＩＳ Ｈ０００１）で用いられている質別記号ＨＸ１、ＨＸ２、ＨＸ３、ＨＸ４、ＨＸ５、ＨＸ６、ＨＸ７、ＨＸ８、ＨＸ９のもの（ただし、Ｘ：１〜３）が挙げられる。これに対し、軟質アルミ箔は、上記の硬質アルミ箔以外のアルミ箔を意味し、例えば、完全焼き鈍しにより軟化させた状態の箔等が挙げられ、一般的にＪＩＳ規格（ＪＩＳ Ｈ０００１）でＯ材と称されているものが挙げられる。   The hard aluminum foil means an aluminum foil in a state of being processed and rolled by processing (rolling), for example, a foil after work hardening, a foil subjected to an appropriate heat treatment after work hardening, etc. Examples of the classification symbols HX1, HX2, HX3, HX4, HX5, HX6, HX7, HX8, and HX9 generally used in the JIS standard (JIS H0001) (where X is 1 to 3). On the other hand, the soft aluminum foil means an aluminum foil other than the above-mentioned hard aluminum foil, and examples thereof include a foil that has been softened by complete annealing, and is generally an O material according to the JIS standard (JIS H0001). What is called is mentioned.

請求項１の発明に係る電池用ラミネート外装材は、それ自体が電池本体の表面フィルムに対して熱接着可能な塗膜層を備えるため、電池本体への装着に際し、別途に粘着テープやホットメルト接着剤を使用することなく、該電池本体に対して直接に容易に熱接着でき、それだけラミネート電池の部品数を少なくできると共に、電池製造ラインの簡素化を可能にする。しかして、その塗膜層は軟化点１６０℃以下の熱接着性樹脂からなるため、ラミネート外装材を該塗膜層側で接するように電池本体に巻き付けた状態で、１６０℃以下の低温加熱によって接着固定でき、もって電池本体内のセパレータの融解や電解液の分解等の熱劣化を回避でき、高い電池性能を維持できる。   Since the laminate outer packaging material for a battery according to the invention of claim 1 itself has a coating layer that can be thermally bonded to the surface film of the battery main body, an adhesive tape or hot melt is separately provided when the battery main body is mounted on the battery main body. Without using an adhesive, it can be easily and thermally bonded directly to the battery main body, so that the number of parts of the laminated battery can be reduced and the battery production line can be simplified. Since the coating layer is made of a heat-adhesive resin having a softening point of 160 ° C. or lower, it is heated at a low temperature of 160 ° C. or lower in a state where the laminate outer packaging material is wound around the battery body so as to be in contact with the coating layer side. It can be bonded and fixed, so that thermal degradation such as melting of the separator in the battery body and decomposition of the electrolyte can be avoided, and high battery performance can be maintained.

請求項２の発明によれば、上記塗膜層の熱接着性樹脂がエチレン−酢酸ビニル共重合体であるから、電池本体の表面フィルムに対して優れた熱接着性を発揮すると共に、高温化で粘度が低下して高い熱流動性を示すため、端部補強用プラスチック部品を使用する際、該プラスチック部品とラミネート外装材とを高温で熱圧着することにより、その圧着部位から溶融した塗膜層の熱接着性樹脂が排除され、ベースフィルムと該プラスチック部品とが強接着する
請求項３の発明によれば、電池用ラミネート外装材の前記塗膜層が特定の厚みを有することから、電池本体との熱接着を低温短時間で行える一方、端部補強用プラスチック部品との熱圧着では圧着部位から流去し易くなる。 According to the invention of claim 2, since the thermal adhesive resin of the coating layer is an ethylene-vinyl acetate copolymer, it exhibits excellent thermal adhesiveness to the surface film of the battery body and is heated to a high temperature. When using plastic parts for edge reinforcement, the coating film melted from the pressure-bonded part by thermocompression bonding of the plastic parts and the laminate outer packaging material at a high temperature. According to the invention of claim 3, since the coating layer of the laminate outer packaging material for a battery has a specific thickness, the heat adhesive resin of the layer is eliminated and the base film and the plastic part are strongly bonded. While thermal bonding with the main body can be performed at a low temperature in a short time, it becomes easy to flow out from the pressure-bonded part in the thermocompression bonding with the end-reinforcing plastic part.

請求項４の発明によれば、電池用ラミネート外装材のベースフィルムがラミネート電池の端部補強用プラスチック部品に対して熱接着可能であるから、電池本体から外れた部位での高温圧着により、該ベースフィルムとプラスチック部品とを強接着できる。   According to the invention of claim 4, since the base film of the laminate outer packaging material for the battery can be thermally bonded to the plastic part for reinforcing the end portion of the laminated battery, the high temperature pressure bonding at the site removed from the battery main body Strong adhesion between base film and plastic parts.

請求項５の発明によれば、電池用ラミネート外装材の金属箔の外面側表面に貼着された特定厚さの延伸フィルムが保護層として機能するから、ラミネート電池の外装に耐摩耗性、耐衝撃性、耐薬品性が付与される。   According to the invention of claim 5, since the stretched film having a specific thickness adhered to the outer surface side surface of the metal foil of the laminate outer packaging material for a battery functions as a protective layer, the outer resistance of the laminated battery is improved. Impact and chemical resistance are added.

請求項６の発明によれば、電池用ラミネート外装材の金属箔の外面側表面に形成された特定厚さの熱硬化樹脂層が保護層として機能するから、ラミネート電池の外装の耐摩耗性、耐衝撃性、耐薬品性が向上する。   According to the invention of claim 6, since the thermosetting resin layer having a specific thickness formed on the outer surface side surface of the metal foil of the laminate exterior material for a battery functions as a protective layer, the abrasion resistance of the exterior of the laminate battery, Improves impact resistance and chemical resistance.

請求項７の発明によれば、金属箔として硬質アルミ箔を用いているから、より軽量化することができる。   According to the invention of claim 7, since the hard aluminum foil is used as the metal foil, the weight can be further reduced.

請求項８の発明に係るラミネート電池は、上記の電池用ラミネート外装材が電池本体に対して確実に接着固定されると共に、電池両端部において端部補強用プラスチック部品が該ラミネート外装材のベースフィルムに強固に接着されたものとなる。   In the laminated battery according to the invention of claim 8, the laminate outer packaging material for the battery is securely bonded and fixed to the battery body, and the plastic parts for reinforcing the end portions at the both ends of the battery are base films of the laminated outer packaging material. It is firmly bonded to the surface.

図１（Ａ）〜（Ｃ）は、この発明を適用するラミネート電池の外装形成を工程順に示している。このラミネート電池は、図１（Ａ）の如く直方体形状の電池本体１０をそれよりも幅広のラミネート外装材１１上に載せ、図１（Ｂ）の如く該ラミネート外装材１１で電池本体１０を包み込んで熱接着した上で、ラミネート外装材１１の両側余剰部にて構成される両端の長方形の各筒状部１１ａに、図１（Ｃ）の如く直方体形状の端部補強用プラスチック部品１２の一部を挿嵌し、該プラスチック部品１２とラミネート外装材１１とを熱接着によって接着固定したものである。図中の１０ａは電池の端子を示す。   1A to 1C show the formation of the exterior of a laminated battery to which the present invention is applied in the order of steps. In this laminated battery, a rectangular parallelepiped battery main body 10 is placed on a wider laminate outer packaging material 11 as shown in FIG. 1A, and the battery main body 10 is wrapped with the laminate outer packaging material 11 as shown in FIG. 1A and 1B, the rectangular cylindrical portions 11a at both ends constituted by the surplus portions on both sides of the laminate exterior material 11 are bonded to one end of the rectangular reinforcing part 12 as shown in FIG. The plastic part 12 and the laminate exterior material 11 are bonded and fixed by thermal bonding. 10a in the figure indicates a battery terminal.

なお、電池本体１０は、リチウムイオン電池やリチウムポリマー電池であり、その表面がポリエチレンテレフタレート（ＰＥＴ）フィルム、ポリエチレンナフタレート（ＰＥＮ）フィルム、ポリアミド（ＯＮ）フィルム、ポリプロピレン（ＯＰＰ）フィルム等の延伸フィルムにて構成されている。   The battery body 10 is a lithium ion battery or a lithium polymer battery, and the surface thereof is a stretched film such as a polyethylene terephthalate (PET) film, a polyethylene naphthalate (PEN) film, a polyamide (ON) film, or a polypropylene (OPP) film. It is composed of.

そして、ラミネート外装材１１は、図２に示すように、ベースフィルム１の一面側に金属箔２が接着剤層３を介して貼着されると共に、該ベースフィルム１の他面側に熱接着性樹脂の塗膜層４が形成されたものを基本構成としている。   As shown in FIG. 2, the laminate exterior material 11 has a metal foil 2 attached to one surface side of the base film 1 via an adhesive layer 3 and is thermally bonded to the other surface side of the base film 1. The basic structure is that in which the coating film layer 4 of the conductive resin is formed.

ここで、ベースフィルム１としては、ポリプロピレン（ＯＰＰ）フィルム、ポリエチレン（ＰＥ）フィルム、ポリカーボネート（ＰＣ）フィルム、アクリロニトリル−ブタジエン−スチレン共重合体（ＡＢＳ）フィルム、１２ナイロンの如き接着性ポリアミド（ＯＮ）フィルム等の熱可塑性樹脂フィルムが使用されるが、端部補強用プラスチック部品１２に対して小さい接着面積でも強固に熱接着できるように、当該プラスチック部品１２と同系の熱可塑性樹脂からなるフィルムが好ましく，特に加工性及び絶縁性に優れたオレフィン系樹脂のフィルムが好適である。   Here, as the base film 1, polypropylene (OPP) film, polyethylene (PE) film, polycarbonate (PC) film, acrylonitrile-butadiene-styrene copolymer (ABS) film, adhesive polyamide (ON) such as 12 nylon. Although a thermoplastic resin film such as a film is used, a film made of a thermoplastic resin similar to the plastic part 12 is preferable so that the end part reinforcing plastic part 12 can be firmly heat-bonded even with a small bonding area. Especially, an olefin resin film excellent in processability and insulation is suitable.

しかして、このベースフィルム１の厚みは、電池本体１０の凹凸のある表面に対しても圧力緩衝作用で確実に接着できるように２０〜１００μｍ程度にするのがよく、薄過ぎては圧力緩衝作用が不充分であるために凹凸のある電池表面には接着不完全になり、厚過ぎてもフィルムが硬くなって接着不完全になる。   Therefore, the thickness of the base film 1 is preferably about 20 to 100 μm so that it can be securely bonded to the uneven surface of the battery body 10 by the pressure buffering action. Is insufficient to adhere to uneven battery surfaces, and if it is too thick, the film becomes hard and incompletely adhered.

金属箔２としては、特に限定されないが、例えばステンレス箔、鉄箔、銅箔、ニッケル箔、硬質アルミ箔等が挙げられる。これらの中でも硬質アルミ箔（硬質アルミニウム箔）が好適である。   Although it does not specifically limit as metal foil 2, For example, stainless steel foil, iron foil, copper foil, nickel foil, hard aluminum foil, etc. are mentioned. Among these, hard aluminum foil (hard aluminum foil) is preferable.

金属箔２としては、厚さが４０〜２００μｍ程度のものが好適であり、薄過ぎては材料強度に劣る一方、厚過ぎては加工が著しく困難になる。また、接着剤層３の接着成分としては、ポリエステル−ウレタン系やポリエーテル−ウレタン系のものが好ましく使用される。   The metal foil 2 having a thickness of about 40 to 200 μm is suitable. If it is too thin, the material strength is inferior, but if it is too thick, processing becomes extremely difficult. Moreover, as an adhesive component of the adhesive layer 3, those of polyester-urethane type or polyether-urethane type are preferably used.

塗膜層４の熱接着性樹脂としては、電池本体１０の表面フィルムに対して熱接着可能な軟化点１６０℃以下のものであればよいが、特に延伸フィルムに対する接着性に優れるエチレン−酢酸ビニル共重合体（以下、ＥＶＡと略称する）が好適である。しかして、この熱接着性樹脂の軟化点が１６０℃より高くなると、電池本体１０に対する熱接着の温度が高くなるため、電池本体１０内のセパレータの融解や電解液の分解等の熱劣化を生じる懸念がある。   The heat-adhesive resin of the coating layer 4 may be any one having a softening point of 160 ° C. or lower that can be heat-bonded to the surface film of the battery body 10, and particularly ethylene-vinyl acetate that has excellent adhesion to a stretched film. A copolymer (hereinafter abbreviated as EVA) is preferred. Therefore, when the softening point of this heat-adhesive resin is higher than 160 ° C., the temperature of heat-bonding to the battery body 10 becomes high, which causes thermal deterioration such as melting of the separator in the battery body 10 and decomposition of the electrolytic solution. There are concerns.

この塗膜層４に用いるＥＶＡとしては、酢酸ビニル含量が３０〜９５質量％、ＭＩ（メルトインデックス）が３以上のものが好ましい。これは、酢酸ビニル含量が３０質量％未満ではアルコール等の溶媒に溶けにくく、ベースフィルム１への塗布が困難になり、ＭＩが３未満では熱流動性に乏しいため、端部補強用プラスチック部品１２との熱接着の際に接着部位から排除されにくく、該プラスチック部品１２とベースフィルム１との強接着を妨げることによる。なお、塗工性を向上するために、ＥＶＡを一部ケン化変性し、アセトオキシ基、カルボキシル基、水酸基等を含むグラフトポリマーとして、アルコール等の溶媒に対する溶解性を高めてもよい。また、延伸フィルムとの接着性をより向上させるために、エチレン−酢酸ビニル共重合体に少量のエチレン−アクリレート共重合体（ＥＥＡ）を添加することもできる。   The EVA used for the coating layer 4 is preferably one having a vinyl acetate content of 30 to 95% by mass and an MI (melt index) of 3 or more. This is because when the vinyl acetate content is less than 30% by mass, it is difficult to dissolve in a solvent such as alcohol, making it difficult to apply to the base film 1, and when MI is less than 3, the thermal fluidity is poor. This is because it is difficult to be removed from the bonding site during the thermal bonding with and prevents strong bonding between the plastic part 12 and the base film 1. In order to improve coatability, EVA may be partially saponified and modified to improve solubility in alcohol or other solvents as a graft polymer containing an acetooxy group, a carboxyl group, a hydroxyl group, and the like. In order to further improve the adhesion to the stretched film, a small amount of ethylene-acrylate copolymer (EEA) can be added to the ethylene-vinyl acetate copolymer.

更に、この塗膜層４には、ベースフィルム１との密着性とホットタック性を向上させる粘着付与成分、ならびにラミネート外装材１１の巻回状態でのブロッキングを防止するためのブロッキング防止剤を、それぞれ樹脂に対して１〜２０質量％程度の範囲で含有させることが推奨される。   Further, the coating layer 4 includes a tackifying component that improves adhesion and hot tackiness with the base film 1, and an anti-blocking agent for preventing blocking in the wound state of the laminate exterior material 11, It is recommended that each be contained in the range of about 1 to 20% by mass with respect to the resin.

上記の粘着付与成分としては、テルペンフェノール樹脂、ロジン及びロジンエステル、石油樹脂等が挙げられ、これらは２種以上を併用してもよいが、特に軟化点６０〜１６０℃で平均分子量３０００以下のものが好ましい。これは、軟化点が６０℃未満ではブロッキングを生じ易く、１６０℃より高くなると低温下での熱接着性が発現せず、また平均分子量が３０００より大きくなると溶解性ならびにエチレン−酢酸ビニル共重合体との相溶性の悪化を招くことによる。   Examples of the tackifier component include terpene phenol resin, rosin and rosin ester, petroleum resin, and the like. These may be used in combination of two or more, and particularly have an average molecular weight of 3000 or less at a softening point of 60 to 160 ° C. Those are preferred. If the softening point is less than 60 ° C., blocking is likely to occur. If the softening point is higher than 160 ° C., thermal adhesiveness at low temperatures does not appear, and if the average molecular weight is higher than 3000, the solubility and ethylene-vinyl acetate copolymer are increased. It causes the deterioration of compatibility with.

上記のブロッキング防止材としては、ＳｉＯ2、ＣａＣＯ3、ＢａＣＯ3、ＴｉＯ2、タルク等の無機質粒子が挙げられ、これらは２種以上を併用してもよいが、特に平均粒子径が１〜１０μｍで比重３以下のものが推奨される。すなわち、平均粒子径が１μｍ未満になると、ブロッキング防止材の粒子同士が凝集密着して樹脂中で分散しにくくなり、逆に１０μｍを越える粒子になると、塗膜層４を形成するためのグラビアコート時にグラビア版の目詰まりが発生する。また、比重が３を越えると、塗布後の乾燥で熱が加わった時に樹脂中で沈降し易く、ブロッキング防止効果を発現しない懸念がある。 Examples of the anti-blocking material include inorganic particles such as SiO 2 , CaCO 3 , BaCO 3 , TiO 2 , and talc. These may be used in combination of two or more, but the average particle diameter is particularly 1 to 10 μm. A specific gravity of 3 or less is recommended. That is, when the average particle diameter is less than 1 μm, the particles of the anti-blocking material are aggregated and adhered to each other, making it difficult to disperse in the resin. Conversely, when the particle diameter exceeds 10 μm, the gravure coating for forming the coating layer 4 Sometimes the gravure plate is clogged. Moreover, when specific gravity exceeds 3, when heat | fever is applied by the drying after application | coating, it will settle easily in resin, and there exists a possibility that a blocking prevention effect may not be expressed.

ベースフィルム１上に塗膜層４を形成するには、前記のエチレン−酢酸ビニル共重合体の如き樹脂成分と要すれば粘着付与成分及びブロッキング防止材をアルコール中に添加混合して乳化し、これをグラビアコート方式でベースフィルム１上に塗布、乾燥すればよい。この塗膜層４の厚さは、０．５〜１０μｍと薄く設定するのがよく、０．５μｍ未満にすることは技術的に難しく、１０μｍを越えると端部補強用プラスチック部品１２との熱接着時に熱流動で排除しにくくなり、ベースフィルム１と該プラスチック部品１２との強接着が困難になる。   In order to form the coating layer 4 on the base film 1, a resin component such as the ethylene-vinyl acetate copolymer and, if necessary, a tackifying component and an antiblocking material are added and mixed in alcohol, and emulsified. What is necessary is just to apply | coat and dry this on the base film 1 by a gravure coat system. The thickness of the coating layer 4 is preferably set as thin as 0.5 to 10 μm, and it is technically difficult to make it less than 0.5 μm. It becomes difficult to eliminate by heat flow at the time of adhesion, and strong adhesion between the base film 1 and the plastic part 12 becomes difficult.

このような構成のラミネート外装材１１を用いて電池本体１０の外装を行うには、まず該ラミネート外装材１１を塗膜層４側が上向きになるように配置し、この上に図１（Ａ）の如く電池本体１０を載せ、図１（Ｂ）の如く該ラミネート外装材１１を電池本体１０に巻き付け、その外側から１６０℃以下の熱板を当接して熱接着する。これにより、溶融した塗膜層４の熱接着性樹脂を介して電池本体１０とラミネート外装材１１とが熱接着されて一体化するが、この熱接着の温度が低いため、電池本体１０内のセパレータの融解や電解液の分解等の熱劣化が回避され、もって高い電池性能を維持できる。   In order to package the battery body 10 using the laminate sheathing material 11 having such a configuration, first, the laminate sheathing material 11 is disposed so that the coating film layer 4 side is facing upward, and on this, the FIG. As shown in FIG. 1B, the laminate outer packaging material 11 is wound around the battery body 10, and a hot plate of 160 ° C. or lower is brought into contact with the outside to thermally bond the battery body. As a result, the battery body 10 and the laminate exterior material 11 are thermally bonded and integrated via the thermally adhesive resin of the melted coating layer 4, but the temperature of this thermal bonding is low, Thermal degradation such as melting of the separator and decomposition of the electrolyte is avoided, and high battery performance can be maintained.

そして、この熱圧着により、幅広のラミネート外装材１１の両側余剰部によって電池本体１０の両端にそれぞれ筒状部１１ａが構成されるから、次に各筒状部１１ａに図１（Ｃ）の如く端部補強用プラスチック部品１２の一部を挿嵌し、その外側から１８０〜２２０℃の熱板を圧接してラミネート外装材１１と該プラスチック部品１２とを熱圧着する。   And by this thermocompression bonding, since the cylindrical part 11a is each comprised at the both ends of the battery main body 10 by the both-sides excess part of the wide laminate exterior material 11, next to each cylindrical part 11a like FIG.1 (C). A part of the end-reinforcing plastic part 12 is inserted, and a hot plate at 180 to 220 ° C. is pressed from the outside to thermally bond the laminate exterior material 11 and the plastic part 12.

このとき、ラミネート外装材１１の両側筒状部１１ａ，１１ａにおける塗膜層４の熱接着性樹脂は、熱圧着の温度が高いために低粘性で流動性の高い融液となり、熱板の圧力で圧着部位から排除される。従って、同系の樹脂材料からなるラミネート外装材１１のベースフィルム１と該プラスチック部品１２とが直接に強接着して一体化することになるが、この高温での熱圧着は電池本体１０から外れた位置でなされるから、該電池本体１０に熱劣化を生じる懸念はない。   At this time, the heat-adhesive resin of the coating layer 4 in the cylindrical portions 11a and 11a on both sides of the laminate exterior material 11 becomes a low-viscosity and high-fluidity melt because of the high thermocompression bonding temperature, and the pressure of the hot plate Is excluded from the crimping site. Therefore, the base film 1 of the laminated exterior material 11 made of a similar resin material and the plastic part 12 are directly strongly bonded and integrated. However, the thermocompression bonding at this high temperature is removed from the battery body 10. Since it is made at the position, there is no concern that the battery main body 10 is thermally deteriorated.

上述した実施形態のラミネート外装材１１ではラミネート電池の外周面に金属箔２が露呈することになるが、この発明のラミネート外装材においては、金属箔２の表面に耐摩耗性、耐衝撃性、耐薬品性等を付与するために、予め保護層を設けておいてもよい。このような保護層を設けるには、例えば図３に示すように、金属箔２のベースフィルム１貼着側とは反対側の表面に接着剤層６を介して延伸フィルム５を貼着したり、図４に示すように、同表面に熱硬化樹脂層７を塗布形成すればよい。   In the laminate exterior material 11 of the above-described embodiment, the metal foil 2 is exposed on the outer peripheral surface of the laminate battery. In the laminate exterior material of the present invention, the surface of the metal foil 2 has wear resistance, impact resistance, In order to provide chemical resistance and the like, a protective layer may be provided in advance. In order to provide such a protective layer, for example, as shown in FIG. 3, the stretched film 5 is attached to the surface of the metal foil 2 opposite to the base film 1 attachment side via the adhesive layer 6. As shown in FIG. 4, a thermosetting resin layer 7 may be applied and formed on the same surface.

しかして、延伸フィルム５としては、ＰＥＴ、ＰＥＮ、ＯＮ、ＯＰＰ等よりなる安価で汎用性のある一般的な樹脂フィルムを使用すればよい。その厚さは８〜４０μｍの範囲が好ましく、８μｍ未満では汎用性がなく、４０μｍよりも厚くなると高価で加工性も悪くなる。また、更に耐摩耗性を向上させるために、延伸フィルム５の表面にシリカやアルミナを真空蒸着したもの、同表面にシロキサン系樹脂をコーティングしたもの、該延伸フィルム５の表面を粗化処理したもの等も使用可能である。なお、接着剤層６としては、ベースフィルム１と金属箔２とを貼着する接着剤層３と同様のものを使用できる。   Therefore, as the stretched film 5, a general resin film that is inexpensive and versatile made of PET, PEN, ON, OPP, or the like may be used. The thickness is preferably in the range of 8 to 40 [mu] m. If the thickness is less than 8 [mu] m, there is no versatility, and if it is thicker than 40 [mu] m, it is expensive and the workability is poor. Further, in order to further improve the wear resistance, the surface of the stretched film 5 is vacuum-deposited with silica or alumina, the surface is coated with a siloxane resin, and the surface of the stretched film 5 is roughened. Etc. can also be used. In addition, as the adhesive layer 6, the thing similar to the adhesive layer 3 which adheres the base film 1 and the metal foil 2 can be used.

一方、熱硬化樹脂層７としては、エポキシ系樹脂、アクリル系樹脂、硝化綿系樹脂等の熱硬化で強固な皮膜を形成し得る樹脂成分を用いればよい。そして、更に耐摩耗性を向上させるために、これらの樹脂中に５質量％以下のシロキサン系樹脂を添加してもよい。また、熱硬化樹脂層７の厚さは、０．５〜５μｍの範囲がよく、薄過ぎては保護層としての効果が期待できず、逆に厚過ぎても却って樹脂層が脆くなる上に加工単価も増大することになる。   On the other hand, as the thermosetting resin layer 7, a resin component that can form a strong film by thermosetting, such as an epoxy resin, an acrylic resin, or a nitrified cotton resin, may be used. And in order to improve abrasion resistance further, you may add 5 mass% or less siloxane-type resin in these resins. Further, the thickness of the thermosetting resin layer 7 is preferably in the range of 0.5 to 5 μm, and if it is too thin, an effect as a protective layer cannot be expected, and conversely if it is too thick, the resin layer becomes brittle. The processing unit price will also increase.

以下、この発明の実施例を比較例と対比して具体的に説明する。なお、以下において、部及び％とあるのは、質量部及び質量％を意味する。   Examples of the present invention will be specifically described below in comparison with comparative examples. In the following, parts and% mean parts by mass and% by mass.

実施例１
ＪＩＳ Ａ３００４−Ｈ１８材からなる厚さ１００μｍの硬質アルミ箔の一面側に、延伸フィルムとして厚さ１２μｍのＰＥＴフィルムをポリエステル−ウレタン系接着剤を介して貼り合わせると共に、該アルミ箔の他面側にベースフィルムとして同じ接着剤を介して厚さ４０μｍのＣＰＰフィルム（キャスティングポリプロピレンフィルム）を貼り合わせてラミネートフィルムを作製した。一方、酢酸ビニル含量４０％でＭＩが１５のＥＶＡ樹脂３０部、ケン化度２０％にした同ＥＶＡ３０部、軟化点９０℃で平均分子量１５００のテルペン樹脂１０部、粒径２〜５μｍで比重２．５〜２．７のＳｉＯ2の１０部を混合した樹脂混合物に、イソプロピルアルコールと純水とを容量比１：１で混合した溶媒を加え、樹脂固形分が４０％となる塗液を調整した。そして、この塗液を前記ラミネートフィルムのＣＰＰフィルム上に乾燥後の厚みが３μｍとなるように塗布したのち、２００℃で２０秒間加熱乾燥することにより、熱接着性樹脂の塗膜層を形成し、電池用ラミネート外装材を作製した。 Example 1
A PET film with a thickness of 12 μm is bonded as a stretched film to one side of a 100 μm-thick hard aluminum foil made of JIS A3004-H18 material via a polyester-urethane adhesive, and on the other side of the aluminum foil. A laminate film was prepared by laminating a 40 μm thick CPP film (casting polypropylene film) through the same adhesive as the base film. On the other hand, 30 parts of EVA resin with a vinyl acetate content of 40% and MI of 15, 30 parts of the same EVA with a saponification degree of 20%, 10 parts of a terpene resin with a softening point of 90 ° C. and an average molecular weight of 1500, a particle size of 2-5 μm and a specific gravity of 2 Add a solvent in which isopropyl alcohol and pure water were mixed at a volume ratio of 1: 1 to a resin mixture in which 10 parts of SiO 2 of 0.5 to 2.7 were mixed to prepare a coating solution with a resin solid content of 40%. did. And after apply | coating this coating liquid on the CPP film of the said laminate film so that the thickness after drying may be set to 3 micrometers, the coating layer of a thermoadhesive resin is formed by heat-drying at 200 degreeC for 20 second. Then, a laminate outer packaging material for a battery was produced.

実施例２
熱接着性樹脂の塗膜層の厚さを１μｍに設定した以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Example 2
A laminate outer packaging material for a battery was produced in the same manner as in Example 1 except that the thickness of the coating layer of the heat-adhesive resin was set to 1 μm.

実施例３
ベースフィルムとしてＣＰＰフィルムに代えて厚さ５０μｍのＰＣフィルムを用いた以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Example 3
A laminate outer packaging material for a battery was produced in the same manner as in Example 1 except that a PC film having a thickness of 50 μm was used instead of the CPP film as the base film.

実施例４
延伸フィルムのＰＥＴフィルムに代えて、アルミ箔の前記一面側にエポキシ樹脂からなる熱硬化性樹脂の塗布、加熱により厚さ２μｍの熱硬化樹脂層を形成した以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Example 4
The same procedure as in Example 1 was conducted except that a thermosetting resin layer having a thickness of 2 μm was formed by applying and heating a thermosetting resin made of an epoxy resin on the one surface side of the aluminum foil instead of the PET film of the stretched film. A laminate outer packaging material for a battery was produced.

実施例５
延伸フィルムのＰＥＴフィルムを貼り合わせなかった以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Example 5
A laminate outer packaging material for a battery was produced in the same manner as in Example 1 except that the stretched PET film was not bonded.

比較例１
ベースフィルムのＣＰＰフィルムを使用せず、アルミ箔の前記一面側に直接に熱接着性樹脂の塗膜層を形成した以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Comparative Example 1
A laminate outer packaging material for a battery was produced in the same manner as in Example 1 except that a CPP film as a base film was not used and a coating layer of a heat-adhesive resin was directly formed on the one surface side of the aluminum foil.

比較例２
熱接着性樹脂の塗膜層の厚さを１５μｍに設定した以外は、実施例１と同様にして電池用ラミネート外装材を作製した。 Comparative Example 2
A laminate outer packaging material for a battery was produced in the same manner as in Example 1 except that the thickness of the coating layer of the heat-adhesive resin was set to 15 μm.

［性能評価試験１］
実施例１〜５及び比較例１、２の電池用ラミネート外装材を用い、既述の図１（Ａ）〜（Ｃ）で示す方法に準じ、表面がＰＥＴフィルムからなるリチウムイオン電池の電池本体に対する熱接着を熱板によって１６０℃×０．２ＭＰａ×２秒の条件で行うと共に、ＰＰ製の端部補強用プラスチック部品に対する熱圧着を熱板によって２００℃×０．４ＭＰａ×３秒の条件で行ってラミネート電池の外装を施した。そして、ラミネート外装材の電池本体及び端部補強用プラスチック部品に対する接着強度を測定した。その結果を表１に示す。なお、端部補強用プラスチック部品は表中ではプラ部品と略記した。 [Performance evaluation test 1]
A battery main body of a lithium ion battery having a surface made of a PET film in accordance with the method shown in FIGS. 1 (A) to (C) described above using the battery laminate outer materials of Examples 1 to 5 and Comparative Examples 1 and 2. And heat bonding with a hot plate under the conditions of 160 ° C. × 0.2 MPa × 2 seconds, and thermocompression bonding to the PP end-reinforcing plastic part with a hot plate under the conditions of 200 ° C. × 0.4 MPa × 3 seconds. The laminate battery was covered. And the adhesive strength with respect to the battery main body and edge part plastic part of a laminate exterior material was measured. The results are shown in Table 1. In addition, the plastic part for edge reinforcement was abbreviated as a plastic part in the table.

［性能評価試験２］
実施例１〜５及び比較例１、２の電池用ラミネート外装材を性能評価試験１と同様の電池本体に巻き付け、粘着テープで接着して固定したのち、粘着テープ面が上になるように縦５００ｍｍ、横５００ｍｍのポリプロピレン製ケースに入れ、ＪＩＳ Ｚ０２３２に基づいた装置で振動範囲５〜１００Ｈｚの不規則振動を６時間与えたのち、ラミネート外装材の外観と、電解液漏れの有無を観察した。その結果を表１に示す。なお、ラミネート外装材の外観については、「◎」…外観変化なし、「○」…外面に僅かな傷が発生、「×」…傷が目立って発生、の３段階で評価した。 [Performance evaluation test 2]
The battery laminate outer materials of Examples 1 to 5 and Comparative Examples 1 and 2 were wrapped around the same battery body as in the performance evaluation test 1 and fixed with an adhesive tape. After placing in a 500 mm wide and 500 mm wide polypropylene case and applying an irregular vibration with a vibration range of 5 to 100 Hz for 6 hours using an apparatus based on JIS Z0232, the appearance of the laminate exterior material and the presence or absence of electrolyte leakage were observed. The results are shown in Table 1. The outer appearance of the laminate exterior material was evaluated in three stages: “◎”: no change in appearance, “◯”: slight scratches on the outer surface, and “x”: conspicuous scratches.

Figure 2007173049
Figure 2007173049

上表の結果から明らかなように、この発明に係る電池用ラミネート外装材（実施例１〜５）は、電池本体の樹脂フィルム表面に対して容易に且つ確実に熱接着できる上、接着面積が小さいにも拘らず、端部補強用プラスチック部品に対しても強固に熱接着できる。また、実施例１〜４のラミネート外装材は、外装後のラミネート電池の振動試験でも傷を生じにくく、強度にも優れるから、最終形態のラミネート電池としての外観を損ねたり電解液漏れを発生する懸念がない。   As is clear from the results in the above table, the laminate outer packaging material for batteries (Examples 1 to 5) according to the present invention can be easily and reliably thermally bonded to the resin film surface of the battery body, and has an adhesion area. Despite its small size, it can be firmly bonded to the end-reinforcing plastic parts. In addition, since the laminate exterior materials of Examples 1 to 4 are less likely to be scratched even in the vibration test of the laminate battery after the exterior and are excellent in strength, the appearance as a laminate battery of the final form is impaired or electrolyte leakage occurs. There is no concern.

この発明を適用するラミネート電池の外装形成を工程順に示し、（Ａ）図は電池本体に対するラミネート外装材の巻き付け前の概略斜視図、（Ｂ）図は同巻き付け後の概略斜視図、（Ｃ）は端部補強用プラスチック部品を装着した外装完了後の概略斜視図である。The exterior formation of a laminate battery to which the present invention is applied is shown in the order of steps, (A) is a schematic perspective view before winding the laminate exterior material around the battery body, (B) is a schematic perspective view after the winding, (C) FIG. 5 is a schematic perspective view after completion of the exterior mounting with the end-part reinforcing plastic parts. この発明の一実施形態に係る電池用ラミネート外装材の縦断面図である。It is a longitudinal cross-sectional view of the laminated exterior material for batteries which concerns on one Embodiment of this invention. 他の実施形態に係る電池用ラミネート外装材の縦断面図である。It is a longitudinal cross-sectional view of the laminated exterior material for batteries which concerns on other embodiment. 更に他の実施形態に係る電池用ラミネート外装材の縦断面図である。It is a longitudinal cross-sectional view of the laminated exterior material for batteries which concerns on other embodiment.

符号の説明Explanation of symbols

１・・・・・ベースフィルム
２・・・・・金属箔
３・・・・・接着剤層
４・・・・・熱接着性樹脂の塗膜層
５・・・・・延伸フィルム
６・・・・・接着剤層
７・・・・・熱硬化樹脂層
１０・・・・電池本体
１１・・・・ラミネート外装材
１１ａ・・・筒状部
１２・・・・端部補強用プラスチック部品 DESCRIPTION OF SYMBOLS 1 ... Base film 2 ... Metal foil 3 ... Adhesive layer 4 ... Coating layer of thermal adhesive resin 5 ... Stretched film 6 .... ... Adhesive layer 7 ... Thermosetting resin layer 10 ... Battery body 11 ... Laminate exterior 11a ... Cylindrical part 12 ... Plastic parts for end reinforcement

Claims (8)

ベースフィルムの一面側に金属箔が貼着されると共に、該ベースフィルムの他面側に、電池本体の表面フィルムに対して熱接着可能な軟化点１６０℃以下の熱接着性樹脂からなる塗膜層が形成されてなる電池用ラミネート外装材。   A metal foil is adhered to one surface side of the base film, and a coating film made of a heat-adhesive resin having a softening point of 160 ° C. or lower that can be thermally bonded to the surface film of the battery body on the other surface side of the base film. A laminate outer packaging material for a battery in which a layer is formed. 前記塗膜層の熱接着性樹脂がエチレン−酢酸ビニル共重合体である請求項１記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to claim 1, wherein the thermal adhesive resin of the coating layer is an ethylene-vinyl acetate copolymer. 前記塗膜層の厚さが０．５〜１０μｍである請求項１又は２に記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to claim 1 or 2, wherein the coating layer has a thickness of 0.5 to 10 µm. 前記ベースフィルムがラミネート電池の端部補強用プラスチック部品に対して熱接着可能な熱可塑性樹脂からなる請求項１〜３のいずれかに記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to any one of claims 1 to 3, wherein the base film is made of a thermoplastic resin that can be thermally bonded to an end reinforcing plastic part of the laminated battery. 前記金属箔のベースフィルム貼着側とは反対側の表面に、厚さ８〜４０μｍの延伸フィルムが貼着されてなる請求項１〜４のいずれかに記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to any one of claims 1 to 4, wherein a stretched film having a thickness of 8 to 40 µm is stuck to a surface of the metal foil opposite to the base film sticking side. 前記金属箔のベースフィルム貼着側とは反対側の表面に、厚さ０．５〜５μｍの熱硬化樹脂層が形成されてなる請求項１〜４のいずれかに記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to any one of claims 1 to 4, wherein a thermosetting resin layer having a thickness of 0.5 to 5 µm is formed on a surface of the metal foil opposite to the base film attaching side. . 前記金属箔が硬質アルミ箔である請求項１〜６のいずれか１項に記載の電池用ラミネート外装材。   The laminate outer packaging material for a battery according to any one of claims 1 to 6, wherein the metal foil is a hard aluminum foil. 電池本体に請求項１〜７のいずれかに記載の電池用ラミネート外装材が前記塗膜層側で接して巻付けられて熱接着されると共に、電池本体の両側にはみ出た該ラミネート外装材の余剰部分で構成される各筒状部に、端部補強用プラスチック部品が少なくとも一部を挿嵌して該ラミネート外装材のベースフィルムに熱接着されてなるラミネート電池。   The laminate outer packaging material for a battery according to any one of claims 1 to 7 is wound in contact with the coating layer side and is thermally bonded to the battery main body, and the laminate outer packaging material protrudes from both sides of the battery main body. A laminated battery in which at least a part of an end-reinforcing plastic part is inserted into each cylindrical part constituted by an excess part and is thermally bonded to a base film of the laminated exterior material.
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KR1020087015025A KR101325345B1 (en) 2005-12-22 2006-12-14 Laminate packing material for battery and laminate battery
DE112006003517T DE112006003517T5 (en) 2005-12-22 2006-12-14 Composite packaging material for a battery and a composite battery
CN2006800485148A CN101346831B (en) 2005-12-22 2006-12-14 Laminate packing material for battery and laminate battery
PCT/JP2006/324962 WO2007072736A1 (en) 2005-12-22 2006-12-14 Laminate packing material for battery and laminate battery
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JP2011165455A (en) * 2010-02-09 2011-08-25 Kohjin Co Ltd Cold forming battery case wrapping material including biaxially-oriented polypropylene film
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