JPH11162420A - Outer sheath for battery - Google Patents

Outer sheath for battery

Info

Publication number
JPH11162420A
JPH11162420A JP9331613A JP33161397A JPH11162420A JP H11162420 A JPH11162420 A JP H11162420A JP 9331613 A JP9331613 A JP 9331613A JP 33161397 A JP33161397 A JP 33161397A JP H11162420 A JPH11162420 A JP H11162420A
Authority
JP
Japan
Prior art keywords
layer
battery
oxide
outer package
polyolefin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9331613A
Other languages
Japanese (ja)
Inventor
Yohei Kageyama
陽平 蔭山
Junji Yotsuyanagi
淳二 四ツ柳
Motoyuki Hirata
元之 平田
Manabu Nakamura
学 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP9331613A priority Critical patent/JPH11162420A/en
Publication of JPH11162420A publication Critical patent/JPH11162420A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Laminated Bodies (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an outer sheathing for a battery having excellent resistance to an electrolytic solution and an excellent long life characteristic. SOLUTION: This laminated film is composed of at least three layers formed by piling up (A) a polyolefin layer, (B) a metal foil layer, and (C) a polyolefin layer including at least one kind of acid acceptor selected among a group of a hydrotalcite compound, aluminum oxide, magnesium oxide, calcium oxide and lead oxide, in turn. Here, the (C) layer is processed inward in a bag-shape, thus forms the outer sheathing for a battery.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、耐電解質液性及び
密封性に優れ、長期間安定性が良好なフィルム状の電池
用外装体に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film-shaped battery casing having excellent electrolyte liquid resistance and sealing properties, and having good long-term stability.

【0002】[0002]

【従来の技術】携帯電話に代表される電子・情報機器の
小型化、軽量化、薄型化に伴い、電池開発も同様の傾向
にある。このため、高分子固体電解質を利用したフィル
ム状の薄い電池が次世代電池の1つとして注目を集めて
いる。従来、電池用外装体としては、ステンレス鋼等の
金属板を加工した金属缶が使用されてきたが、薄型化に
伴い密封工程が著しく煩雑になったり、必要以上の厚み
の金属シートを使用するため、電池の重量の増加や製造
コスト上昇の原因となっていた。このため、フィルム状
電池の外装体には、アルミ等の金属箔とポリオレフィン
から構成される多層ラミネート材で電池内容物を包装
し、その周縁部を熱溶着して密封する方法が採用される
ようになってきた。
2. Description of the Related Art With the miniaturization, weight reduction, and thinning of electronic and information equipment represented by mobile phones, battery development has a similar tendency. For this reason, a thin film-shaped battery using a polymer solid electrolyte has attracted attention as one of the next-generation batteries. Conventionally, as a battery exterior, a metal can processed from a metal plate such as stainless steel has been used, but the sealing process becomes extremely complicated with thinning, or a metal sheet with an unnecessarily thick thickness is used. As a result, the weight of the battery increases and the manufacturing cost increases. For this reason, a method of packaging the battery contents with a multilayer laminate material composed of a metal foil such as aluminum and polyolefin, and sealing the peripheral edge portion by heat welding is adopted as the outer package of the film battery. It has become

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記外
装体は、長期間保存すると外部より滲入した微量の水分
が電解質液等の電池内容物と反応してフッ酸等が発生す
る。このフッ酸等は、金属箔とポリオレフィンの界面に
著しいデラミ(層間剥離)を誘発し、進入した電池内容
物が金属箔を腐食するものが多い。これは特に電池内容
物を挿入後の密封シール時に電解質液を夾雑した場合に
顕著である。更に通常の熱溶着では電極端子部分を中心
に完全な密封性を得ることが困難である。したがって、
従来の多層ラミネート材では、長期に亘る安定した電池
性能を維持できないという問題があった。本発明は、か
かる状況に鑑みてなされたものであり、電解質液によっ
て発生するフッ酸等によるデラミが発生せず、且つ密封
性に優れた密閉型非水電解質電池、特にリチウム電池、
リチウムイオン2次電池等の外装体を提供することを目
的とする。
However, when the above-mentioned outer package is stored for a long period of time, a small amount of water that has infiltrated from the outside reacts with battery contents such as an electrolyte solution to generate hydrofluoric acid and the like. This hydrofluoric acid or the like induces remarkable delamination (delamination) at the interface between the metal foil and the polyolefin, and the entered battery contents often corrode the metal foil. This is particularly noticeable when the electrolyte solution is contaminated at the time of hermetic sealing after inserting the battery contents. In addition, it is difficult to obtain complete sealing around the electrode terminal portion by ordinary heat welding. Therefore,
The conventional multilayer laminate has a problem that stable battery performance cannot be maintained for a long time. The present invention has been made in view of such circumstances, does not cause delamination due to hydrofluoric acid or the like generated by the electrolyte solution, and a sealed nonaqueous electrolyte battery excellent in sealing properties, particularly a lithium battery,
It is an object to provide an exterior body such as a lithium ion secondary battery.

【0004】[0004]

【課題を解決するための手段】本発明者らは、鋭意研究
を重ねた結果、金属箔の内層側に特定の樹脂層を設ける
ことにより上記目的を達成しうることを見いだし、この
知見に基づいて本発明を完成するに至った。すなわち、
本発明は、(A)ポリオレフィン層、(B)金属箔層、
(C)ハイドロタルサイト類化合物、酸化アルミニウ
ム、酸化マグネシウム、酸化カルシウム、酸化鉛からな
る群から選ばれた少なくとも1種の受酸剤を含有するポ
リオレフィン層を順に積層してなる少なくとも3層から
なる積層フィルムを、(C)層を内側に袋状に加工して
なる電池用外装体を提供するものである。
Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by providing a specific resin layer on the inner layer side of a metal foil, and based on this finding. Thus, the present invention has been completed. That is,
The present invention provides (A) a polyolefin layer, (B) a metal foil layer,
(C) At least three layers formed by sequentially laminating a polyolefin layer containing at least one acid acceptor selected from the group consisting of hydrotalcite compounds, aluminum oxide, magnesium oxide, calcium oxide, and lead oxide. An object of the present invention is to provide a battery exterior body obtained by processing the laminated film into a bag shape with the (C) layer inside.

【0005】[0005]

【発明の実施の形態】本発明における両外層である
(A)ポリオレフィン層及び(C)ポリオレフィン層と
しては、特に限定されるものはなく、熱溶着が可能な樹
脂であればいずれも使用できる。具体的には、低密度ポ
リエチレン、高密度ポリエチレン、線状低密度ポリエチ
レン、ポリプロピレン等が挙げられ、これらの混合物で
あってもよい。更には、これらの延伸フィルムを用いる
こともできる。(A)層と(C)層とは同一の材料でも
異なる材料であってもよい。これらの中でも、熱溶着性
等の観点からポリプロピレンが好適である。また、
(C)層の厚みは、密封性の点から、積層フィルムの全
厚みの10〜50%であることが好ましい。
BEST MODE FOR CARRYING OUT THE INVENTION The outer layers (A) and (C), which are both outer layers in the present invention, are not particularly limited, and any resin that can be thermally welded can be used. Specific examples include low-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, and the like, and a mixture thereof may be used. Furthermore, these stretched films can also be used. The (A) layer and the (C) layer may be the same material or different materials. Among these, polypropylene is preferred from the viewpoint of heat welding properties and the like. Also,
The thickness of the layer (C) is preferably from 10 to 50% of the total thickness of the laminated film from the viewpoint of sealing properties.

【0006】本発明における(C)ポリオレフィン層
は、ハイドロタルサイト類化合物、酸化アルミニウム、
酸化マグネシウム、酸化カルシウム、酸化鉛からなる群
から選ばれた少なくとも1種の受酸剤を含有することが
必要である。ハイドロタルサイト類化合物は、下記一般
式で示される。 Mga Meb (OH)c CO3 ・nH2 O (ただし、MeはAl,CrまたはFeを、aは1〜1
0の整数を、bは1〜5の整数を、cは10〜20の整
数を、またnは0〜8の整数をそれぞれ表す)上式にお
いてnが0というのは、該化合物を250〜350℃の
温度で焼成して結晶水を除去したものに相当する。具体
例としては、次式 Mg4.5 Al2 (OH)13CO3 ・3.5H2 O で表される塩基性マグネシウム・アルミニウム・ハイド
ロオキシ・カーボネート・ハイドレートが挙げられる。
上記受酸剤は、塩酸やフッ酸等の受酸剤として一般にゴ
ムやポリ塩化ビニル等の添加剤として用いられている。
該受酸剤は粒径が3μm以下及び比表面積が5〜15m
2 /gであるのが好ましい。受酸剤の含有量としては、
通常0.2〜40重量%であり、好ましくは0.5〜3
0重量%である。混合方法としては、フィルム成形時に
直接、ポリオレフィンと受酸剤を混合してもよいが、分
散性の点からは予め高濃度に混合したマスターバッチを
フィルム成形時にポリオレフィンに混合するのが好まし
い。
In the present invention, the polyolefin layer (C) comprises a hydrotalcite compound, aluminum oxide,
It is necessary to contain at least one acid acceptor selected from the group consisting of magnesium oxide, calcium oxide, and lead oxide. The hydrotalcite compound is represented by the following general formula. Mg a Me b (OH) c CO 3 · nH 2 O ( however, Me is Al, Cr or Fe, a is 1 to 1
N represents an integer of 0, b represents an integer of 1 to 5, c represents an integer of 10 to 20 and n represents an integer of 0 to 8). This corresponds to one obtained by firing at a temperature of 350 ° C. to remove water of crystallization. Specific examples include the following formula Mg 4.5 Al 2 (OH) 13 CO 3 · 3.5H basic magnesium aluminum Hydroxyfluoran carbonate-hydrate represented by 2 O.
The acid acceptor is generally used as an acid acceptor such as hydrochloric acid or hydrofluoric acid as an additive such as rubber or polyvinyl chloride.
The acid acceptor has a particle size of 3 μm or less and a specific surface area of 5 to 15 m.
It is preferably 2 / g. As the content of the acid acceptor,
Usually 0.2 to 40% by weight, preferably 0.5 to 3%
0% by weight. As a mixing method, a polyolefin and an acid acceptor may be directly mixed at the time of film formation, but it is preferable to mix a master batch previously mixed at a high concentration with the polyolefin at the time of film formation from the viewpoint of dispersibility.

【0007】本発明における(B)金属箔層としては、
アルミ、ステンレス等が挙げられる。これらの中でも、
軽量化の点から特にアルミが好ましい。(B)層の厚み
は一般に5〜200μm であり、特に10〜50μm が
好適である。
In the present invention, (B) the metal foil layer includes:
Examples include aluminum and stainless steel. Among these,
Aluminum is particularly preferred in terms of weight reduction. The thickness of the layer (B) is generally from 5 to 200 μm, and preferably from 10 to 50 μm.

【0008】本発明においては、金属箔層のピンホール
あるいはクラックによる性能低下を予防するため、金属
箔の内層側に(D)ガスバリア樹脂層を更に設けておく
ことが好ましい。該ガスバリア樹脂としては、例えば、
金属酸化物薄膜蒸着ポリエステル、ポリビニルアルコー
ル、エチレン−ビニルアルコール共重合体、ポリ塩化ビ
ニリデン、ポリフッ化ビニリデン、ポリアミド等が挙げ
られる。これらの中でも酸化アルミ蒸着ポリエステルが
好適に用いられる。本発明における積層フィルムは、上
記各層を接着性樹脂あるいは接着剤を用いてラミネート
することにより得ることができる。接着性樹脂として
は、ポリオレフィンの場合には、不飽和カルボン酸無水
物を共重合もしくはグラフト重合して得られる酸無水物
変性ポリオレフィンが好ましい。原料となるポリオレフ
ィンとしては、エチレン、プロピレン、ブテン−1、ペ
ンテン−1、ヘキセン−1等のα−オレフィンの単独重
合体もしくはこれらαーオレフィンの2種以上の共重合
体等が挙げられる。ここで共重合体にはランダムまたは
ブロックの共重合体が含まれる。またこれらの酸無水物
変性ポリオレフィンは2種以上を併用してもよい。
[0008] In the present invention, it is preferable to further provide (D) a gas barrier resin layer on the inner layer side of the metal foil in order to prevent performance degradation due to pinholes or cracks in the metal foil layer. As the gas barrier resin, for example,
Examples thereof include metal oxide thin film-deposited polyester, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyvinylidene chloride, polyvinylidene fluoride, and polyamide. Among these, aluminum oxide-deposited polyester is preferably used. The laminated film in the present invention can be obtained by laminating the above layers using an adhesive resin or an adhesive. When the adhesive resin is a polyolefin, an acid anhydride-modified polyolefin obtained by copolymerizing or graft-polymerizing an unsaturated carboxylic anhydride is preferable. Examples of the polyolefin as a raw material include homopolymers of α-olefins such as ethylene, propylene, butene-1, pentene-1, and hexene-1, and copolymers of two or more of these α-olefins. Here, the copolymer includes a random or block copolymer. Further, two or more of these acid anhydride-modified polyolefins may be used in combination.

【0009】本発明に用いる不飽和カルボン酸無水物と
しては、無水マレイン酸、無水フタル酸、無水イタコン
酸、無水エンディック酸等が挙げられる。特に接着性の
観点よりポリエチレンあるいはポリプロピレンに無水マ
レイン酸0.001〜10重量%をグラフト重合した接
着性樹脂が好適である。本発明の酸無水物変性ポリオレ
フィンの製造方法としては、公知の各種の方法を採用で
きる。例えば、前記ポリオレフィンに不飽和カルボン酸
無水物及び有機過酸化物等の反応開始剤を添加し、溶融
混練する方法が挙げられる。また、接着剤としては、一
般に合成樹脂フィルム及び金属箔を対象とした、各種ラ
ミネート用途に使用される一液あるいは二液反応型の接
着剤などを用いることができ、特に主剤にポリエステル
系樹脂、硬化剤にポリイソシアネートを有機溶剤に溶
解、分散させたものが好適である。
The unsaturated carboxylic anhydride used in the present invention includes maleic anhydride, phthalic anhydride, itaconic anhydride, endic anhydride and the like. In particular, from the viewpoint of adhesiveness, an adhesive resin obtained by graft polymerization of 0.001 to 10% by weight of maleic anhydride to polyethylene or polypropylene is preferable. As the method for producing the acid anhydride-modified polyolefin of the present invention, various known methods can be employed. For example, there is a method in which a reaction initiator such as an unsaturated carboxylic anhydride and an organic peroxide is added to the polyolefin and melt-kneaded. In addition, as the adhesive, generally, a synthetic resin film and a metal foil, a one-component or two-component reactive adhesive used for various laminating applications and the like can be used. It is preferable that a polyisocyanate is dissolved and dispersed in an organic solvent in a curing agent.

【0010】フィルムの積層方法としては、一般的なラ
ミネート成形で行うことができる。すなわち、層間に接
着性樹脂を用いる場合は押出ラミネート成形、層間に接
着剤を用いる場合はドライラミネート成形により得るこ
とができる。
[0010] As a method of laminating a film, it can be carried out by a general lamination molding. That is, when an adhesive resin is used between layers, extrusion lamination can be used, and when an adhesive is used between layers, dry lamination can be used.

【0011】本発明の外装体は、上記積層フィルムを袋
状に加工し、電池内容物の挿入部分を除いて周縁部を熱
溶着することにより得られる。この際、通常の製袋で採
用されている2辺あるいは3辺シール製袋、あるいはピ
ロー製袋を用いることができるが、特に密封性の点か
ら、フィルムの長手方向(背貼り部分)を重ね合わせた
溶着、すなわち封筒状の製袋が好適である。熱溶着の方
法としては、一般の合成樹脂フィルムで用いられるイン
パルス方式、熱板方式、高周波誘導加熱方式、超音波誘
導加熱方式等を用いることができるが、なかでも高周波
誘導加熱方式は外層を冷却しながら金属箔自体を加熱で
きる利点があり好適に用いられる。特に、封筒状製袋の
場合は、少なくとも背貼りの重なり部は高周波誘導加熱
方式により熱溶着され、重なり部の内側の(B)金属箔
層の端面がポリオレフィン層により被覆されていること
が好ましい。
The outer package of the present invention is obtained by processing the above-mentioned laminated film into a bag shape and heat-welding the peripheral portion except for the inserted portion of the battery contents. At this time, a two-sided or three-sided seal-made bag or a pillow-made bag which is used in normal bag-making can be used. The combined welding, that is, envelope-shaped bag making is suitable. As a method of heat welding, an impulse method, a hot plate method, a high frequency induction heating method, an ultrasonic induction heating method, or the like used in a general synthetic resin film can be used. Among them, the high frequency induction heating method cools an outer layer. It has the advantage that the metal foil itself can be heated while being used, and is preferably used. In particular, in the case of envelope-shaped bag making, it is preferable that at least the overlapping portion of the backing is thermally welded by a high-frequency induction heating method, and the end face of the (B) metal foil layer inside the overlapping portion is covered with a polyolefin layer. .

【0012】[0012]

【実施例】次に、実施例により更に詳しく説明するが、
本発明はこれらの実施例により限定されるものではな
い。なお、各種特性の測定方法を以下に述べる。 (1)耐デラミ特性 外寸が9cm×4cmである角形袋状の外装体を作製
し、その内部に電解質液(炭酸エチレン及び炭酸ジエチ
ルの等重量混合溶液1kgに対して、6フッ化リン酸リ
チウムを1mol溶解させたもの)を3ml充填し、開
口部に電極端子を挿入夾雑させた後、熱溶着により密封
した試料を、温度60℃、相対湿度90%のオーブン中
に70日間静置後、金属箔とバリア性樹脂層間の剥離強
度をJIS−K1707に準拠し測定した。 (2)電解質液揮散量 上記外装体に上記電解質液を0.5ml充填し、開口部
に電極端子を挿入夾雑させた後、熱溶着により密封した
試料を、温度60℃、相対湿度90%のオーブン中に7
0日間静置後の減少重量を揮散量とした。
Next, the present invention will be described in more detail with reference to Examples.
The present invention is not limited by these examples. In addition, the measuring method of various characteristics is described below. (1) Delamination resistance A rectangular bag-shaped outer package having an outer size of 9 cm x 4 cm is prepared, and an electrolyte solution (1 kg of a mixed solution of an equal weight of ethylene carbonate and diethyl carbonate is added to 6 kg of phosphoric acid hexafluoride). After filling 3 ml of the mixture with 1 mol of lithium dissolved therein, inserting the electrode terminals into the openings and contaminating them, the sample sealed by heat welding was allowed to stand in an oven at a temperature of 60 ° C. and a relative humidity of 90% for 70 days. The peel strength between the metal foil and the barrier resin layer was measured according to JIS-K1707. (2) Amount of electrolyte liquid volatilized After filling 0.5 ml of the above electrolyte solution into the outer package, inserting an electrode terminal into the opening and contaminating the sample, sealing the sample by heat welding at a temperature of 60 ° C. and a relative humidity of 90%. 7 in the oven
The weight loss after standing for 0 days was defined as the amount of volatilization.

【0013】実施例1 (A)ポリオレフィン層として厚み60μm のポリプロ
ピレンフィルム(昭和電工プラスチックプロダクツ社
製、シヨウレックスアロマーU)、(B)金属箔層とし
て厚み15μm のアルミ箔(昭和アルミニウム社製、一
般箔AIN30H−0)、及び(C)ポリオレフィン層
としてポロプロピレン(日本ポリオレフィン社製、ジェ
イアロマーFG464)に対してハイドロタルサイト
(協和化学工業社製、DHT−4A)を10重量%配合
し、Tダイ押出機を用いて、厚み30μm のフィルムに
成形した。これらのフィルムをドライラミネート成形に
より(A)層/(B)層/(C)層の順に積層した積層
フィルムを得た。尚、積層フィルムの各層間の接着に
は、ドライラミネート用接着剤(東洋モートン社製、A
D−506S)を用いた。得られた積層フィルムを所望
の寸法となるよう裁断し、(C)層を内側に折り曲げ、
長手方向を重ね合わせ高周波誘導加熱方式のヒートシー
ル装置を用いて内側及び外側の重なり端部を中心に合計
2か所の熱溶着を行った後、底部も同様の熱溶着を行
い、袋状の外装体を作製した。袋内部に所定の電解質液
を充填した後、電極端子として幅5mm、長さ30m
m、厚み50μmのアルミ箔片(熱溶着部両面を厚み2
0μmの接着性樹脂{日本ポリオレフィン社製、アドテ
ックスER321P}でインパルスシールしたもの)を
開口部に挿入夾雑させて、上記と同様の熱溶着により密
封した。熱溶着の条件は、幅5mmのシール板を用い
て、出力電流11アンペア、加熱時間0.6秒、冷却時
間5.0秒で行った。得られた試料を用いて耐デラミ特
性、電解質液揮散量を測定した。
Example 1 (A) A polypropylene film having a thickness of 60 μm (Showa Denko Plastic Products Co., Ltd., Shorex Aroma U) as a polyolefin layer, and (B) an aluminum foil having a thickness of 15 μm as a metal foil layer (manufactured by Showa Aluminum Co., Ltd. Foil AIN30H-0) and (C) 10% by weight of hydrotalcite (DHT-4A, manufactured by Kyowa Chemical Industry Co., Ltd.) with polypropylene (J-Alomer FG464, manufactured by Nippon Polyolefin Co., Ltd.) as a polyolefin layer, It was formed into a film having a thickness of 30 μm using a die extruder. A laminated film was obtained by laminating these films in the order of (A) layer / (B) layer / (C) layer by dry lamination molding. In addition, an adhesive for dry lamination (Toyo Morton, A
D-506S). The obtained laminated film is cut into a desired size, and the (C) layer is bent inward,
The longitudinal direction is overlapped, and a total of two places are welded around the inner and outer overlapping ends using a high-frequency induction heating type heat sealing device. An exterior body was produced. After filling the inside of the bag with a predetermined electrolyte solution, the electrode terminals are 5 mm wide and 30 m long.
m, 50μm thick aluminum foil pieces (thickness 2
An adhesive resin having a thickness of 0 μm (adhesive-sealed by Adtex ER321P, manufactured by Nippon Polyolefin Co., Ltd.) was inserted into the opening, contaminated, and sealed by the same heat welding as described above. The conditions for the heat welding were as follows: a seal plate having a width of 5 mm was used, and the output current was 11 amps, the heating time was 0.6 seconds, and the cooling time was 5.0 seconds. Using the obtained sample, the resistance to delamination and the amount of volatilized electrolyte solution were measured.

【0014】実施例2 (C)層のハイドロタルサイト含有量を5重量%とした
以外は実施例1と同様にして作製し、特性評価を行っ
た。
Example 2 A layer was prepared in the same manner as in Example 1 except that the hydrotalcite content of the layer (C) was changed to 5% by weight, and the characteristics were evaluated.

【0015】実施例3 (C)層のハイドロタルサイトに替えて、酸化マグネシ
ウムを用いた以外は実施例1と同様にして作製し、特性
評価を行った。
Example 3 A sample was prepared in the same manner as in Example 1 except that magnesium oxide was used instead of the hydrotalcite in the layer (C), and the characteristics were evaluated.

【0016】実施例4 (B)層と(C)層の間に、厚み12μmの酸化アルミ
ニウム蒸着ポリエチレンテレフタレートフィルム(東洋
メタライジング社製、BARRIALOX,VM−PE
T1011HG)を積層した4層フィルムを用いた以外
は実施例1と同様にして作製し、特性評価を行った。
Example 4 Between layer (B) and layer (C), a 12 μm-thick aluminum oxide-deposited polyethylene terephthalate film (BARRIALOX, VM-PE, manufactured by Toyo Metallizing Co., Ltd.)
T1011HG), and the characteristics were evaluated in the same manner as in Example 1, except that a four-layer film laminated with T1011HG) was used.

【0017】比較例1 (C)層にハイドロタルサイトを含有させない厚みが3
0μm のポリプロピレンフィルム(昭和電工プラスチッ
クプロダクツ社製、ショウレックスアロマーZP)を用
いた以外は実施例1と同様に作製し、特性評価を行っ
た。以上の結果を表1に示す。
Comparative Example 1 The thickness (C) of the layer (C) containing no hydrotalcite was 3
A film was prepared in the same manner as in Example 1 except that a 0 μm polypropylene film (Showa Denko Plastic Products, Shorex Aroma ZP) was used, and the characteristics were evaluated. Table 1 shows the above results.

【0018】[0018]

【表1】 [Table 1]

【0019】[0019]

【発明の効果】本発明の電池用外装体は、耐電解質液性
及び長期保存特性に優れるので密閉型非水電解質電池、
特にリチウム電池、リチウムイオン2次電池等に有用で
ある。
EFFECTS OF THE INVENTION The battery casing of the present invention is excellent in electrolyte solution resistance and long-term storage characteristics, so that a sealed nonaqueous electrolyte battery,
It is particularly useful for lithium batteries, lithium ion secondary batteries, and the like.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 学 神奈川県川崎市川崎区千鳥町3番2号 昭 和電工株式会社川崎樹脂研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Manabu Nakamura 3-2 Chidori-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Denko KK

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 (A)ポリオレフィン層、(B)金属箔
層、(C)ハイドロタルサイト類化合物、酸化アルミニ
ウム、酸化マグネシウム、酸化カルシウム、酸化鉛から
なる群から選ばれた少なくとも1種の受酸剤を含有する
ポリオレフィン層を順に積層してなる少なくとも3層か
らなる積層フィルムを、(C)層を内側に袋状に加工し
てなる電池用外装体。
Claims: 1. A polyolefin layer, (B) a metal foil layer, (C) a hydrotalcite compound, aluminum oxide, magnesium oxide, calcium oxide, and lead oxide. An outer package for a battery obtained by processing a laminated film composed of at least three layers formed by sequentially laminating a polyolefin layer containing an acid agent into a bag shape with the (C) layer inside.
【請求項2】 (A)ポリオレフィン層、(B)金属箔
層、(D)ガスバリア樹脂層、(C)ハイドロタルサイ
ト類化合物、酸化アルミニウム、酸化マグネシウム、酸
化カルシウム、酸化鉛からなる群から選ばれた少なくと
も1種の受酸剤を含有するポリオレフィン層を順に積層
してなる少なくとも4層からなる積層フィルムを、
(C)層を内側に袋状に加工してなる電池用外装体。
2. A material selected from the group consisting of (A) a polyolefin layer, (B) a metal foil layer, (D) a gas barrier resin layer, (C) a hydrotalcite compound, aluminum oxide, magnesium oxide, calcium oxide, and lead oxide. A laminated film consisting of at least four layers obtained by sequentially laminating a polyolefin layer containing at least one kind of acid acceptor,
(C) An outer package for a battery obtained by processing a layer into a bag shape on the inside.
【請求項3】 封筒状であって、背貼りの重なり部の内
側の(B)層端面がポリオレフィン層により被覆されて
いることを特徴とする請求項1または請求項2記載の電
池用外装体。
3. The battery outer package according to claim 1, wherein the outer package has a shape of an envelope, and an end surface of the layer (B) inside the overlapping portion of the back is covered with a polyolefin layer. .
【請求項4】 背貼りの重なり部が高周波誘導加熱方式
により熱溶着されていることを特徴とする請求項3記載
の電池用外装体。
4. The outer package for a battery according to claim 3, wherein the overlapping portion of the back paste is heat-welded by a high-frequency induction heating method.
【請求項5】 (C)層における受酸剤の含有量が0.
5〜30重量%である請求項1〜請求項4のいずれか1
項に記載の電池用外装体。
5. The method according to claim 1, wherein the content of the acid acceptor in the layer (C) is 0.1.
5. The method according to claim 1, wherein the content is 5 to 30% by weight.
Item 14. The battery outer package according to Item 6.
JP9331613A 1997-12-02 1997-12-02 Outer sheath for battery Pending JPH11162420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9331613A JPH11162420A (en) 1997-12-02 1997-12-02 Outer sheath for battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9331613A JPH11162420A (en) 1997-12-02 1997-12-02 Outer sheath for battery

Publications (1)

Publication Number Publication Date
JPH11162420A true JPH11162420A (en) 1999-06-18

Family

ID=18245622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9331613A Pending JPH11162420A (en) 1997-12-02 1997-12-02 Outer sheath for battery

Country Status (1)

Country Link
JP (1) JPH11162420A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011275A (en) * 2001-06-29 2003-01-15 Toppan Printing Co Ltd Laminate and packaging body formed of the laminate
JP2011134544A (en) * 2009-12-24 2011-07-07 Konica Minolta Holdings Inc Lamination body for battery outer case, manufacturing method, and secondary battery using the laminated body for battery outer case
JP2012145180A (en) * 2011-01-13 2012-08-02 Tokai Rubber Ind Ltd Refrigerant transportation hose
JP2018073474A (en) * 2016-10-24 2018-05-10 住友電気工業株式会社 Battery-packaging material and battery
US20210350818A1 (en) * 2020-05-06 2021-11-11 Feasible Inc. Acoustic signal based analysis of films

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003011275A (en) * 2001-06-29 2003-01-15 Toppan Printing Co Ltd Laminate and packaging body formed of the laminate
JP2011134544A (en) * 2009-12-24 2011-07-07 Konica Minolta Holdings Inc Lamination body for battery outer case, manufacturing method, and secondary battery using the laminated body for battery outer case
JP2012145180A (en) * 2011-01-13 2012-08-02 Tokai Rubber Ind Ltd Refrigerant transportation hose
JP2018073474A (en) * 2016-10-24 2018-05-10 住友電気工業株式会社 Battery-packaging material and battery
US20210350818A1 (en) * 2020-05-06 2021-11-11 Feasible Inc. Acoustic signal based analysis of films

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