JP3132405B2 - Enclosure bag for non-aqueous electrolyte batteries - Google Patents
Enclosure bag for non-aqueous electrolyte batteriesInfo
- Publication number
- JP3132405B2 JP3132405B2 JP09014886A JP1488697A JP3132405B2 JP 3132405 B2 JP3132405 B2 JP 3132405B2 JP 09014886 A JP09014886 A JP 09014886A JP 1488697 A JP1488697 A JP 1488697A JP 3132405 B2 JP3132405 B2 JP 3132405B2
- Authority
- JP
- Japan
- Prior art keywords
- bag
- aqueous electrolyte
- hydrofluoric acid
- layer
- electrolyte battery
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子機器の電源等
に使用される非水電解質電池の封入袋に関するものであ
る。より詳細には、正極、負極、電解液が封入袋に封入
され、正極と負極のリード線を夫々外部に取り出す構造
を有し、かつ、電解液の密封についての信頼性が高い構
造を有することを特徴とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed bag for a non-aqueous electrolyte battery used as a power source for electronic equipment. More specifically, the positive electrode, the negative electrode, and the electrolyte are sealed in an enclosing bag, and the structure has a structure in which the lead wires of the positive electrode and the negative electrode are respectively taken out to the outside, and a structure having high reliability in sealing the electrolyte. It is characterized by.
【０００２】[0002]
【従来の技術】電子機器の小型化と共に電源としての電
池の小型化、軽量化への要求が強まっている。一方、電
池に対する高エネルギー密度化、高エネルギー効率化も
求められており、Ｌｉイオン電池などの２次電池への期
待が高まっている。こうした要求に対して、例えば、特
開昭６１−２４０５６４号に見られるごとく、耐酸性を
有する熱可塑性樹脂からなる袋に極板群を挿入し、この
極板群を多数個、フィルム状、シート状またはチューブ
状合成樹脂からなる袋状外装体で包み込んで密閉型鉛蓄
電池とする試みが提案されている。また、特開平３−６
２４４７号や特開昭５７−１１５８２０号に見られるよ
うに封入袋のシートに、プラスチックフィルムの間に金
属層を挟んだ構造として密封性を向上する試みもある。2. Description of the Related Art Along with miniaturization of electronic equipment, there is an increasing demand for miniaturization and weight reduction of a battery as a power supply. On the other hand, batteries are also required to have higher energy density and higher energy efficiency, and expectations for secondary batteries such as Li-ion batteries are increasing. In response to such demands, for example, as seen in JP-A-61-240564, a group of electrode plates is inserted into a bag made of an acid-resistant thermoplastic resin, and a large number of the electrode groups are formed into a film or sheet. There has been proposed an attempt to form a sealed lead-acid battery by enclosing it in a bag-like outer body made of a tubular or tubular synthetic resin. Also, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 2447 and Japanese Patent Application Laid-Open No. 57-115820, there is also an attempt to improve the sealing performance by forming a structure in which a metal layer is sandwiched between plastic films in a sheet of an enclosing bag.
【０００３】[0003]
【発明が解決しようとする課題】金属層を設けることで
密封性は大幅に向上するが、シール部分からの水分の侵
入を完全に防ぐことは出来ない。水分が侵入すると、電
解液と反応しフッ酸を生成するが、このフッ酸がプラス
チックフィルム層を透過して金属層を腐食するか或いは
金属層とプラスチック層間で剥離を発生させることがあ
る。本発明は水分が侵入し、フッ酸が生成したとして
も、金属層を腐食すること、或いは金属層とプラスチッ
クフィルム層間で剥離を発生させることのない非水電解
質電池用封入袋を提供することを目的する。The provision of a metal layer greatly improves the sealing performance, but does not completely prevent the penetration of moisture from the sealing portion. When moisture enters, it reacts with the electrolytic solution to generate hydrofluoric acid, and this hydrofluoric acid may permeate the plastic film layer and corrode the metal layer, or may cause separation between the metal layer and the plastic layer. The present invention provides an enclosing bag for a non-aqueous electrolyte battery that does not corrode a metal layer or cause peeling between a metal layer and a plastic film layer even when moisture invades and generates hydrofluoric acid. Aim.
【０００４】[0004]
【課題を解決するための手段】本発明者等は上述の目的
を達成すべく鋭意検討した結果、プラスチック層のうち
少なくとも一つの層に酸の透過防止手段を設ければ、フ
ッ酸の生成によっても、金属層を腐食することがなく、
また、金属層とプラスチックフィルム層間で剥離を発生
させることがないことを見いだした。The present inventors have conducted intensive studies to achieve the above-mentioned object, and as a result, if at least one of the plastic layers is provided with an acid permeation preventing means, the generation of hydrofluoric acid will be prevented. Without corroding the metal layer,
It has also been found that no delamination occurs between the metal layer and the plastic film layer.
【０００５】本発明の要旨は、次の通りである。非水電
解質電池を構成する正極、負極、水分と接触することで
フッ酸を発生する電解液、等を封入し、正極と負極のリ
ードを夫々外部に取り出し、これらのリード線をも封入
するための袋であって、金属層と１層もしくは多層から
なるプラスチック層の貼り合わせシートで構成され、プ
ラスチック層のうち少なくとも一つの層に酸の透過防止
手段を設けていることを特徴とする非水電解質電池用封
入袋であって、酸の透過防止手段として炭酸カルシウ
ム、酸化マグネシウム、ハイドロタルサイト類、ステア
リン酸カルシウムの群より選ばれる１種または数種の混
合物を含有せしめたことがあげられる。また、水分と接
触することでフッ酸を発生する電解液がＬｉＰＦ6 を含
むことを特徴とする。The gist of the present invention is as follows. By contacting the positive electrode, negative electrode, and moisture that make up the nonaqueous electrolyte battery
Electrolyte which generates hydrofluoric acid, or the like filled with, take out a positive electrode and the negative electrode lead respectively outside a bag for even encapsulating these leads, metal layers and one or plastic layer consisting of a multilayer A sealing sheet for a non-aqueous electrolyte battery, characterized in that at least one of the plastic layers is provided with an acid permeation preventing means , wherein calcium carbonate is used as the acid permeation preventing means.
, Magnesium oxide, hydrotalcites, steer
One or several kinds selected from the group of calcium phosphate
The compound is contained . Further, the electrolyte which generates hydrofluoric acid by contact with water contains LiPF 6 .
【０００６】問題点と解決手段をさらに詳しく述べる。
封入袋の構成の一例として、アルミ箔の外面にＰＥＴフ
ィルムを貼り合わせ、内面にポリエチレンなどの熱可塑
性樹脂を貼り合わせたものを挙げることができる。外面
のＰＥＴはアルミを外傷から保護するために設けられて
おり、内面のポリエチレンはヒートシールを行うために
設けている。このような従来考案されていた材料を用い
た場合、ヒートシールをしていても長時間保存している
うちに徐々に水分が侵入し、その水が袋内に封入してい
る電解液と反応してフッ酸を生成する。このフッ酸はポ
リエチレン等を透過し、アルミとポリエチレンの接着界
面を剥離させてしまうという問題があり、このような袋
タイプの電池容器が実用化されない要因の一つとなって
いた。The problem and the solution will be described in more detail.
As an example of the configuration of the enclosing bag, there can be cited one in which a PET film is attached to the outer surface of an aluminum foil and a thermoplastic resin such as polyethylene is attached to the inner surface. The PET on the outer surface is provided to protect aluminum from external damage, and the polyethylene on the inner surface is provided for heat sealing. When such a conventionally devised material is used, moisture gradually penetrates during long-term storage even if heat sealing is performed, and the water reacts with the electrolyte solution sealed in the bag. To produce hydrofluoric acid. This hydrofluoric acid has a problem in that it permeates polyethylene and the like and peels off the adhesive interface between aluminum and polyethylene, which is one of the factors that make such a bag-type battery container not practical.
【０００７】この問題を解決するためには、水分をまっ
たく侵入させない材料を開発するか、或いは水分が侵入
してフッ酸が発生したとしても、そのフッ酸を透過させ
ない樹脂層を設けることが出来れば良い。今回フッ酸を
透過させない樹脂層を設ける検討を行った結果、上述の
ような方法により目的を達することが可能であることが
判った。即ち、カルボン酸金属塩、或いは金属酸化物を
樹脂中に添加することによって発生した酸を途中でトラ
ップさせるという方法である。カルボン酸金属塩、金属
酸化物として上述の炭酸カルシウム、酸化マグネシウ
ム、ハイドロタルサイト類、ステアリン酸カルシウム等
が好ましいが、その他ポリ塩化ビニル用の安定剤等も効
果的である。これらを含有せしめる樹脂としては、電解
液に侵されにくくポリエチレン、ポリプロピレン、或い
はそれらの酸変成物、アイオノマー等であることが好ま
しいが、電解液に侵される材料であってもその内面に電
解液に侵されにくい樹脂層を設けるのであれば良い。In order to solve this problem, it is possible to develop a material that does not allow moisture to penetrate at all, or to provide a resin layer that does not allow hydrofluoric acid to permeate even if moisture enters to generate hydrofluoric acid. Good. As a result of examining the provision of a resin layer that does not allow hydrofluoric acid to permeate, it was found that the object can be achieved by the above-described method. That is, a method in which an acid generated by adding a metal carboxylate or a metal oxide to a resin is trapped on the way. As the carboxylate metal salt and metal oxide, the above-mentioned calcium carbonate, magnesium oxide, hydrotalcites, calcium stearate and the like are preferable, but other stabilizers for polyvinyl chloride are also effective. The resin containing these is preferably polyethylene, polypropylene, or their acid-modified products, ionomers, and the like, which are hardly attacked by the electrolytic solution. What is necessary is just to provide the resin layer which is hardly attacked.
【０００８】[0008]
【実施例】以下に実施例、比較例を挙げて本発明を説明
する。なお、これらの実施例は本発明を限定するもので
はない。 （実施例１） ９μｍアルミ箔の外面に５μｍウレタン
系接着剤を介して１２μｍのＰＥＴフィルムを貼り合わ
せたシートの内面に、無水マレイン酸変成低密度ポリエ
チレン１００重量部に対して炭酸カルシウム３０重量部
を配合した樹脂組成物を５０μｍ積層したシートを作
製。このシートは電解質（１ｍｏｌ／リットルのＬｉＰ
Ｆ6を含むエチレンカーボネートとジエチルカーボネー
トの１：１混合溶液）及び図２の如くにリード線をとり
つけた電極を封入してヒートシールした後、６０℃、９
５％ＲＨ恒温恒湿槽中に放置し、外観の変化を調べた。
その結果、３０日間経過時点で外観上の変化は認められ
なかった。The present invention will be described below with reference to examples and comparative examples. Note that these examples do not limit the present invention. (Example 1) 30 parts by weight of calcium carbonate with respect to 100 parts by weight of maleic anhydride-modified low-density polyethylene were bonded to the inner surface of a sheet in which a 12-μm PET film was bonded to the outer surface of a 9-μm aluminum foil via a 5-μm urethane-based adhesive. A sheet was prepared by laminating a resin composition containing 50 μm. This sheet is made of electrolyte (1 mol / L LiP
1 of ethylene carbonate and diethyl carbonate containing F 6: 1 mixture) and was heat sealed by sealing electrodes attached lead wires to as in FIG. 2, 60 ℃, 9
It was left in a 5% RH constant temperature / humidity bath and the change in appearance was examined.
As a result, no change in appearance was observed after 30 days.
【０００９】（実施例２） 実施例１で炭酸カルシウム
を、酸化マグネシウム、に変更したもので結果は実施例
１と同様であった。(Example 2) The same results as in Example 1 were obtained by changing calcium carbonate in Example 1 to magnesium oxide.
【００１０】（実施例３） 実施例１で炭酸カルシウム
を、ハイドロタルサイト、に変更したもので結果は実施
例１と同様であった。(Example 3) The same results as in Example 1 were obtained by changing calcium carbonate in Example 1 to hydrotalcite.
【００１１】（実施例４） 実施例１で炭酸カルシウム
を、ステアリン酸カルシウムに変更したもので結果は実
施例１と同様であった。(Example 4) The same results as in Example 1 were obtained by changing calcium carbonate in Example 1 to calcium stearate.
【００１２】（比較例１） 実施例１で炭酸カルシウム
を抜いた材料を用いたが、恒温恒湿槽に放置後３日目で
アルミ層と樹脂層の間で剥離が発生し、さらにアルミ層
の腐食が認められた。(Comparative Example 1) The material from which calcium carbonate was removed in Example 1 was used. However, peeling occurred between the aluminum layer and the resin layer on the third day after being left in a thermo-hygrostat, and the aluminum layer was further removed. Corrosion was observed.
【００１３】[0013]
【発明の効果】実施例等にて説明した通り、本発明によ
れば水分と接触することでフッ酸を発生する電解液を用
いた場合に長期間使用しても袋に使用する金属層の腐
食、或いは金属層の剥がれ等が発生しない、非水電解質
電池用封入袋を提供することが可能となる。As described in the examples, according to the present invention, an electrolytic solution which generates hydrofluoric acid by contact with water is used.
In this case, it is possible to provide a non-aqueous electrolyte battery encapsulation bag which does not cause corrosion of the metal layer used in the bag or peeling of the metal layer even when used for a long period of time.
【図１】本発明の封入袋とリード線を用いた非水電解質
電池を示す。FIG. 1 shows a non-aqueous electrolyte battery using a sealed bag and a lead wire of the present invention.
【図２】封入袋の内部を模式的に示す。FIG. 2 schematically shows the inside of an enclosing bag.
【図３】封入袋の断面を示す。FIG. 3 shows a cross section of an enclosing bag.
【図４】封入袋のヒートシール部の拡大図を示す。FIG. 4 is an enlarged view of a heat sealing portion of the enclosing bag.
１，１′：リード線の導体 ２，２′：リード線の絶縁 ３：封入袋 ４：封入袋のシール部（一例） ５，５′：電極 ６：隔膜 ７：正極集電体 ７′：負極集電体 ８：正極の活物質 ８′：負極の活物質 ９：アルミ箔 １０：絶縁外層（電極リード用絶縁） １１：熱可塑性プラスチック層 １２：ＰＥＴ層 1, 1 ': conductor of lead wire 2, 2': insulation of lead wire 3: sealed bag 4: sealed portion of sealed bag (example) 5, 5 ': electrode 6: diaphragm 7: positive electrode current collector 7': Negative electrode current collector 8: Positive electrode active material 8 ': Negative electrode active material 9: Aluminum foil 10: Insulating outer layer (insulation for electrode lead) 11: Thermoplastic layer 12: PET layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 啓一 大阪府大阪市此花区島屋一丁目１番３号 住友電気工業株式会社大阪製作所内 (56)参考文献 特開 平３−15150（ＪＰ，Ａ) 特開 平９−288996（ＪＰ，Ａ) 実開 昭61−116071（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/02 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiichi Tanaka, Inventor 1-3-1, Shimaya, Konohana-ku, Osaka-shi, Osaka Sumitomo Electric Industries, Ltd. Osaka Works (56) References JP-A-3-15150 (JP, A JP-A-9-288996 (JP, A) JP-A-61-116071 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) H01M 2/02
Claims (2)
水分と接触することでフッ酸を発生する電解液、等を封
入し、正極と負極のリードを夫々外部に取り出し、これ
らのリード線をも封入するための袋であって、金属層と
１層もしくは多層からなるプラスチック層の貼り合わせ
シートで構成され、プラスチック層のうち少なくとも一
つの層にフッ酸の透過防止手段として炭酸カルシウム、
酸化マグネシウム、ハイドロタルサイト類、ステアリン
酸カルシウムの群より選ばれる１種または数種の混合物
を含有せしめたことを特徴とする非水電解質電池用封入
袋。A positive electrode, a negative electrode, and a non-aqueous electrolyte battery,
A bag for enclosing an electrolytic solution or the like that generates hydrofluoric acid upon contact with moisture, taking out the leads of the positive electrode and the negative electrode, respectively, and enclosing these lead wires as well. Or composed of a laminated sheet of a multi-layer plastic layer, calcium carbonate as a means for preventing the permeation of hydrofluoric acid in at least one of the plastic layers,
An encapsulating bag for a non-aqueous electrolyte battery, characterized by containing one or more mixtures selected from the group consisting of magnesium oxide, hydrotalcites and calcium stearate.
電解液がＬｉＰＦ6を含むことを特徴とする特許請求の
範囲第１項記載の非水電解質電池用封入袋。2. The sealed bag for a non-aqueous electrolyte battery according to claim 1, wherein the electrolytic solution that generates hydrofluoric acid upon contact with water contains LiPF 6 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09014886A JP3132405B2 (en) | 1997-01-29 | 1997-01-29 | Enclosure bag for non-aqueous electrolyte batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09014886A JP3132405B2 (en) | 1997-01-29 | 1997-01-29 | Enclosure bag for non-aqueous electrolyte batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10208709A JPH10208709A (en) | 1998-08-07 |
| JP3132405B2 true JP3132405B2 (en) | 2001-02-05 |
Family
ID=11873505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09014886A Expired - Fee Related JP3132405B2 (en) | 1997-01-29 | 1997-01-29 | Enclosure bag for non-aqueous electrolyte batteries |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3132405B2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4620202B2 (en) * | 2000-01-20 | 2011-01-26 | 大日本印刷株式会社 | Method for producing polymer battery packaging material |
| JP2001266809A (en) * | 2000-03-16 | 2001-09-28 | Dainippon Printing Co Ltd | Packing material for polymer battery and manufacturing method of the same |
| JP2001176464A (en) | 1999-12-17 | 2001-06-29 | Sumitomo Electric Ind Ltd | Nonaqueous electrolyte battery |
| JP4620203B2 (en) * | 2000-01-20 | 2011-01-26 | 大日本印刷株式会社 | Method for producing polymer battery packaging material |
| JP2001266810A (en) * | 2000-03-16 | 2001-09-28 | Dainippon Printing Co Ltd | Packing material for polymer battery and manufacturing method of the same |
| JP4769994B2 (en) * | 2000-02-16 | 2011-09-07 | 大日本印刷株式会社 | Method for producing polymer battery packaging material |
| JP4867063B2 (en) * | 1999-12-17 | 2012-02-01 | 大日本印刷株式会社 | Polymer battery packaging materials |
| JP5042402B2 (en) * | 2000-02-16 | 2012-10-03 | 大日本印刷株式会社 | Sealing head for polymer battery packaging |
| JP4620232B2 (en) * | 2000-02-16 | 2011-01-26 | 大日本印刷株式会社 | Method for producing packaging material for lithium battery |
| JP4620233B2 (en) * | 2000-03-15 | 2011-01-26 | 大日本印刷株式会社 | Method for producing packaging material for lithium battery |
| JP2001266811A (en) * | 2000-03-16 | 2001-09-28 | Dainippon Printing Co Ltd | Packing material for polymer battery and manufacturing method of the same |
| JP5413341B2 (en) * | 2010-09-27 | 2014-02-12 | 大日本印刷株式会社 | Polymer battery packaging materials |
| JP6104821B2 (en) | 2011-02-18 | 2017-03-29 | ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ | Glass, especially glass solder or molten glass |
-
1997
- 1997-01-29 JP JP09014886A patent/JP3132405B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10208709A (en) | 1998-08-07 |
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