JP2001035477A - Flat battery and its manufacture - Google Patents
Flat battery and its manufactureInfo
- Publication number
- JP2001035477A JP2001035477A JP11209400A JP20940099A JP2001035477A JP 2001035477 A JP2001035477 A JP 2001035477A JP 11209400 A JP11209400 A JP 11209400A JP 20940099 A JP20940099 A JP 20940099A JP 2001035477 A JP2001035477 A JP 2001035477A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- package
- film
- fusion
- resin film
- 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.)
- Granted
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)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は扁平型の密閉式電
池、特に発電要素が、周縁部が樹脂の融着により封止さ
れたフィルム状パッケージに内包された扁平型電池に関
するものである。更には長期信頼性に優れ、生産性の高
い安価な電池を提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat type sealed battery, and more particularly to a flat type battery in which a power generation element is included in a film-like package whose peripheral portion is sealed by fusion of a resin. Further, the present invention provides an inexpensive battery with excellent long-term reliability and high productivity.
【０００２】[0002]
【従来の技術】近年、電子技術の大きな進歩により、一
般ユーザー向けの携帯機器の小型軽量化が進んでいる。2. Description of the Related Art In recent years, with the great progress in electronic technology, portable devices for general users have been reduced in size and weight.
【０００３】非水電解液系の密閉式電池を例にとり、電
池のパッケージの面から小型軽量化の動きを説明する
と、成型品の場合、それまでの鉄、ステンレス鋼等の重
い材質から、アルミニウム等の軽い材質への転換があ
る。さらに最近の動きとして、アルミニウム箔を芯材と
してその両面に合成樹脂層を配したラミネートフィルム
の採用がある。このパッケージ方式は、過去に実公平３
−３９８８３号や実公平２−９４９８号に提案されてい
る。[0003] Taking the non-aqueous electrolyte type sealed battery as an example, the movement of miniaturization and lightening will be described from the viewpoint of the battery package. In the case of a molded product, heavy materials such as iron and stainless steel are replaced by aluminum. There is a switch to lighter materials such as. As a more recent movement, there has been adopted a laminate film in which an aluminum foil is used as a core material and a synthetic resin layer is disposed on both sides thereof. This package system has been
No. 39983 and Japanese Utility Model Publication No. 2-9498.
【０００４】ラミネートフィルムの構成は、通常アルミ
ニウム箔を芯材に、外面にポリエチレンテレフタレート
やポリアミド樹脂層、内面にポリプロピレンやポリエチ
レン等融着性樹脂の層を配している。フィルム状パッケ
ージ式扁平型電池の構造は、正極、負極、電解質および
セパレータで構成される発電要素が、周縁部が融着され
たフィルム状パッケージ内に内包され、正極および負極
の端子は、融着部を貫通して内部の正極、負極と接続し
ている。端子は厚さが数十〜１００μｍのニッケル、ア
ルミニウム、銅等の金属箔である。[0004] The structure of the laminated film is usually such that an aluminum foil is used as a core material, a polyethylene terephthalate or polyamide resin layer is provided on the outer surface, and a fusible resin layer such as polypropylene or polyethylene is provided on the inner surface. The structure of the film-type packaged flat battery is such that a power generation element composed of a positive electrode, a negative electrode, an electrolyte, and a separator is enclosed in a film-shaped package in which a peripheral portion is fused, and the terminals of the positive electrode and the negative electrode are fused. The part is penetrated and connected to the internal positive and negative electrodes. The terminal is a metal foil of nickel, aluminum, copper or the like having a thickness of several tens to 100 μm.
【０００５】上記構造の扁平型電池においては、気密性
に優れること及び正極、負極間の短絡が生じないことが
高い信頼性を確保する上で重要である。[0005] In the flat battery having the above structure, it is important that the airtightness is excellent and that no short circuit occurs between the positive electrode and the negative electrode in order to ensure high reliability.
【０００６】ここでいう短絡とは、正極端子、負極端子
または正極集電体、負極集電体が各々ラミネートフィル
ムの芯材であるアルミニウム箔と接触して生じる短絡の
ことである。[0006] The short-circuit referred to here is a short-circuit that occurs when the positive electrode terminal, the negative electrode terminal or the positive electrode current collector, and the negative electrode current collector respectively come into contact with the aluminum foil as the core material of the laminated film.
【０００７】優れた気密性を得る為には、特に端子貫通
部の気密保持が重要で、技術的に難しい端子側面と封口
樹脂との良好な密着が要求される。また短絡を生じさせ
ないためには、端子および集電体とアルミニウム芯材と
の間に、強固で柔軟な絶縁層が確実に形成されていなけ
ればならない。端子とパッケージフィルムの密着を向上
させる方法として、特開昭６０−６５４４２号、特開昭
６３−２３２２６５号等には端子表面のプライマー処理
が提案されている。In order to obtain excellent airtightness, it is particularly important to maintain the airtightness of the terminal penetrating portion, and good adhesion between the terminal side and the sealing resin, which is technically difficult, is required. In order to prevent a short circuit, a strong and flexible insulating layer must be reliably formed between the terminal and the current collector and the aluminum core material. As a method for improving the adhesion between the terminal and the package film, primer treatment of the terminal surface is proposed in JP-A-60-65442 and JP-A-63-232265.
【０００８】また、端子とフィルムの芯材であるアルミ
ニウム箔の接触を防止する方法としては、特開平２−６
００５０号には両者の間にポリイミド樹脂のように非可
塑性の樹脂層を配置する方法が、また特開平１１−４０
１９８号には端子貫通部分のフィルムの芯材であるアル
ミニウム箔を排除する方法が提案されている。A method for preventing contact between the terminal and an aluminum foil as a core material of a film is disclosed in Japanese Patent Application Laid-Open No. 2-6 / 1990.
No. 0050 discloses a method of arranging a non-plastic resin layer such as a polyimide resin between them,
No. 198 proposes a method of removing an aluminum foil which is a core material of a film in a terminal penetrating portion.
【０００９】[0009]
【発明が解決しようとする課題】しかし、前記従来技術
のうち、端子のプライマー処理に関しては、気密性は向
上するものの、短絡防止に関してはほとんど効果が無
く、かつプライマー処理工程は煩雑であり、融着封止部
へのプライマー処理部の位置合わせも難しいため、生産
性に乏しい欠点があった。However, among the above-mentioned prior arts, although the airtightness is improved with respect to the primer treatment of the terminal, there is almost no effect on the prevention of short circuit, and the primer treatment process is complicated. Since it is also difficult to position the primer-treated portion to the sealing portion, the productivity is poor.
【００１０】また、端子とパッケージの間に非可塑性樹
脂を挿入する方法や、端子貫通部の芯材を排除する方法
は、短絡防止の目的には有効であるが、気密性が犠牲に
なるという欠点があった。本発明は、高い気密性を保ち
ながら、短絡の恐れがなく、さらには生産性にも優れた
密閉式扁平型電池を提供するものである。The method of inserting a non-plastic resin between the terminal and the package and the method of removing the core material of the terminal penetrating portion are effective for the purpose of preventing a short circuit, but the airtightness is sacrificed. There were drawbacks. An object of the present invention is to provide a sealed flat type battery which maintains high airtightness, is free from the possibility of short circuit, and is excellent in productivity.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、発電要素が、少なくとも一辺が樹脂融着
により封止されたパッケージに内包され、正極および負
極の端子が該融着部を貫通してなる電池において、端子
とパッケージの間の少なくとも端子と融着部が重なる位
置に、融着性樹脂フィルムが挿入されてなる扁平型電池
である。また、端子とパッケージが接する表裏２面のう
ち、少なくとも片面に融着性樹脂フィルムが挿入されて
なる扁平型電池である。また、正極および負極端子が樹
脂融着部を貫通し、該貫通部に隣接する両方もしくは片
方の辺が樹脂融着により封止された電池であって、端子
とパッケージの間に挿入された融着性樹脂フィルムが極
群の肩部を覆っていることを特徴とする密閉式電池であ
る。また、正極および負極の少なくとも一方の集電体に
端子接続用タブ部が形成されており、端子とパッケージ
の間に挿入された融着性樹脂フィルムが、該タブ部を覆
っていることを特徴とする扁平型電池である。また、端
子とパッケージの間に挿入される融着性樹脂フィルム
を、あらかじめパッケージ内面に固定することを特徴と
する扁平型電池の製造方法である。In order to solve the above-mentioned problems, the present invention provides a power generation element which is enclosed in a package having at least one side sealed by resin fusion, and wherein a positive electrode terminal and a negative electrode terminal are connected to each other by the fusion joint. Is a flat battery in which a fusible resin film is inserted at least between the terminal and the package at a position where the terminal and the fusion portion overlap. Further, the flat battery has a fusible resin film inserted into at least one of two front and back surfaces of the terminal and the package in contact with each other. In addition, a battery in which the positive electrode and the negative electrode terminal penetrate the resin-fused portion, and both or one side adjacent to the penetrated portion is sealed by resin fusion, and is a battery inserted between the terminal and the package. The sealed battery is characterized in that the adhesive resin film covers the shoulder of the electrode group. Also, a terminal connection tab portion is formed on at least one of the positive electrode and the negative electrode current collectors, and a fusible resin film inserted between the terminal and the package covers the tab portion. Is a flat type battery. Further, there is provided a method for manufacturing a flat battery, wherein a fusible resin film inserted between a terminal and a package is fixed to an inner surface of the package in advance.
【００１２】即ち、本発明は、前記課題の中で、品質上
の高信頼性を達成するため、少なくとも端子と融着部が
重なる面の端子とパッケージの間に融着樹脂フィルムを
挿入する。更には、該挿入フィルムが、極群の少なくと
も片面の集電体の肩部を覆うか、端子接続用タブを設け
た集電体の場合には該タブ部も覆うように配置する。That is, according to the present invention, in order to achieve high quality reliability, a fusion resin film is inserted between at least the terminal and the package on the surface where the fusion portion overlaps. Further, the insertion film is arranged so as to cover the shoulder of the current collector on at least one side of the pole group, or to cover the tab in the case of a current collector provided with a terminal connection tab.
【００１３】また生産性を高めるために、端子とパッケ
ージの間に挿入される融着性フィルムは、あらかじめパ
ッケージフィルム内面に固定される。本固定によって、
融着性フィルムの位置決めが容易で、かつ正確にでき
る。結果として生産性を高める効果がある。In order to enhance the productivity, the fusible film inserted between the terminal and the package is fixed to the inner surface of the package film in advance. With this fixed,
The positioning of the fusible film is easy and accurate. As a result, there is an effect of increasing productivity.
【００１４】[0014]
【発明の実施の形態】図１は、本発明の実施の一形態を
示す電池の外観図である。パッケージフィルム１は、外
面が厚さ約２０μｍのポリエチレンテレフタレートフィ
ルム、内面が厚さ約３０μｍのポリプロピレンフィル
ム、芯材が厚さ約５０μｍのアルミニウム箔で構成され
ている。発電要素は表裏２枚のラミネートフィルムから
なるパッケージフィルム１内に内包され、該フィルム１
の周縁部２は、表裏二枚のラミネートフィルムのポリプ
ロピレンフィルム層同士が融着封止されている。FIG. 1 is an external view of a battery showing an embodiment of the present invention. The package film 1 has a polyethylene terephthalate film with an outer surface of about 20 μm in thickness, a polypropylene film with an inner surface of about 30 μm in thickness, and a core material of aluminum foil with a thickness of about 50 μm. The power generating element is included in a package film 1 composed of two laminated films, one on the front and the other on the back.
In the peripheral portion 2, the polypropylene film layers of the front and back laminate films are fusion-sealed.
【００１５】４はアルミニウム箔製の正極端子、５は銅
箔製の負極端子であり、厚さは共に２０〜５０μｍであ
る。該端子はパッケージの融着封止部を貫通して、内包
された発電要素の正極および負極と接続している。３は
端子とパッケージフィルム１の間に挿入された厚さ５０
〜１００μｍの融着性樹脂フィルムである。挿入された
該フィルム３は、少なくとも端子と融着部が重なる面を
覆っており、わずかに端部が外に出ている。樹脂フィル
ム３と端子４および５は強固に接着しており、振動、衝
撃、曲げが加わっても剥離を生じない。また端子の側面
を含む界面に隙間無く密着している。該フィルム３はさ
らに水分等の透過の極力小さい材質で構成される。該フ
ィルム３の材質の具体例として、ポリエチレンやポリプ
ロピレン等がある。中でも強度、耐熱性に於いてポリプ
ロピレンが優れている。 さらにマレイン酸変性変性ポ
リプロピレン等の酸変性ポリプロピレンは、接着強度、
柔軟性、加熱融着によって隙間を埋める性質においてす
ぐれており、本発明の樹脂フィルムとして好適である。Numeral 4 denotes a positive electrode terminal made of aluminum foil, and numeral 5 denotes a negative electrode terminal made of copper foil, each having a thickness of 20 to 50 μm. The terminal penetrates the fusion sealing portion of the package and is connected to the positive and negative electrodes of the included power generating element. 3 is a thickness 50 inserted between the terminal and the package film 1
It is a fusible resin film of 100 μm. The inserted film 3 covers at least the surface where the terminal and the fused portion overlap, and the end is slightly exposed. The resin film 3 and the terminals 4 and 5 are firmly adhered to each other, and do not peel even when subjected to vibration, impact, or bending. In addition, it is in close contact with the interface including the side surface of the terminal without any gap. The film 3 is made of a material that transmits moisture and the like as small as possible. Specific examples of the material of the film 3 include polyethylene and polypropylene. Among them, polypropylene is superior in strength and heat resistance. Furthermore, acid-modified polypropylene such as maleic acid-modified polypropylene has an adhesive strength,
It is excellent in flexibility and the property of filling gaps by heat fusion, and is suitable as the resin film of the present invention.
【００１６】樹脂フィルム３の厚さは、端子の厚さと同
等もしくはそれ以上で、具体的には数十〜２００μｍが
望ましい。The thickness of the resin film 3 is equal to or greater than the thickness of the terminal, and specifically, is preferably several tens to 200 μm.
【００１７】図２は、図１で示した電池の表側のパッケ
ージフィルムをめくって内部が見えている図である。１
はパッケージフィルムである。２は周縁部の融着部であ
る。樹脂フィルム３はポリプロピレンからなり、端子
４，５とパッケージフィルム１との間に挿入されてい
る。正極端子４は、図では裏側に隠れて見えないが、正
極集電体に接続している。５は負極端子であり、負極集
電体６と接続している。７はセパレータである。FIG. 2 is a view showing the inside of the battery shown in FIG. 1 by turning over the package film on the front side. 1
Is a package film. Reference numeral 2 denotes a fused portion at the periphery. The resin film 3 is made of polypropylene, and is inserted between the terminals 4 and 5 and the package film 1. The positive electrode terminal 4 is connected to a positive electrode current collector, although it is hidden by the back side in the figure and cannot be seen. Reference numeral 5 denotes a negative electrode terminal, which is connected to the negative electrode current collector 6. 7 is a separator.
【００１８】樹脂フィルム３は、表側のパッケージフィ
ルム１内面のポリプロピレンフィルム層に、図２に示す
ようにあらかじめ融着固定されて、表側のパッケージフ
ィルムを裏側のパッケージフィルムに重ね合わせた時、
二点鎖線で示すように両極の端子および斜線で示した融
着部分の重なる面を覆う。樹脂フィルム３は、端子の平
面部に対して強力に接着する。また、端子の厚さと同等
以上の厚さを有する樹脂フィルム３は、融着時に端子側
面とフィルム１の間の隙間を埋め、側面でも強力な接着
が得られ、結果として気密性の高いシールが達成され
る。The resin film 3 is previously fused and fixed to the polypropylene film layer on the inner surface of the package film 1 on the front side as shown in FIG. 2, and when the package film on the front side is overlaid on the package film on the back side,
As shown by the two-dot chain line, the terminal of both electrodes and the overlapping surface of the fused portion shown by oblique lines are covered. The resin film 3 strongly adheres to the flat portion of the terminal. In addition, the resin film 3 having a thickness equal to or greater than the thickness of the terminal fills a gap between the terminal side surface and the film 1 at the time of fusion, and strong adhesion is obtained also on the side surface, and as a result, a highly airtight seal is obtained. Achieved.
【００１９】また、樹脂フィルム３の存在は、端子とラ
ミネートフィルムの芯材であるアルミニウム箔との間
に、確実な絶縁層を維持するのに有効であり、前記端子
とアルミニウム芯材との接触による両極間の短絡発生の
防止に有効である。すなわち、樹脂フィルム３の厚さと
ラミネートフィルム１内面の融着樹脂層の厚さを足した
樹脂層の厚さは、端子４または５の厚さを超えており、
融着時に樹脂層が溶融しても、端子とアルミニウム芯材
との間に樹脂層が確保される。The presence of the resin film 3 is effective for maintaining a reliable insulating layer between the terminal and the aluminum foil as the core material of the laminate film, and the contact between the terminal and the aluminum core material is effective. This is effective in preventing the occurrence of a short circuit between the two electrodes due to. That is, the thickness of the resin layer obtained by adding the thickness of the resin film 3 and the thickness of the fusion resin layer on the inner surface of the laminate film 1 exceeds the thickness of the terminal 4 or 5,
Even if the resin layer is melted during fusion, the resin layer is secured between the terminal and the aluminum core.
【００２０】端子とパッケージ内面が接する面が表裏二
面あるが、二つの面の両方に樹脂フィルム３を挿入すれ
ば、もちろん気密性、短絡防止に有効である。しかしな
がら、上記のように、樹脂フィルムの厚さを端子の厚さ
と同等か、もしくは厚く設定することにより、表裏どち
らか片面のみの挿入でも充分有効であることが確認され
た。片面のみの挿入により、両面挿入よりさらに生産性
を高めることができる。The terminal and the inner surface of the package are in contact with each other on the front and back surfaces. Inserting the resin film 3 on both surfaces is, of course, effective for airtightness and short circuit prevention. However, as described above, by setting the thickness of the resin film equal to or larger than the thickness of the terminal, it was confirmed that the insertion of only one of the front and back surfaces is sufficiently effective. By inserting only one side, productivity can be further improved compared to double-sided insertion.
【００２１】本発明では、樹脂フィルム３はあらかじめ
パッケージフィルム１内面に固定されているので、組立
時の位置決めが容易である他、前記従来提案の端子のプ
ライマー処理に比べて、はるかに簡単であり、生産性に
優れた方法である。In the present invention, since the resin film 3 is fixed to the inner surface of the package film 1 in advance, the positioning at the time of assembling is easy, and the resin film 3 is much simpler than the conventional primer treatment of the terminal. , A method with excellent productivity.
【００２２】８は表側のパッケージフィルム１にあらか
じめ設けられた型付けを示し、発電要素収納の位置決め
に有効であるほか、シール時に、パッケージフィルムに
張力が加わるのを防ぐ。これにより、集電体エッジに当
接するパッケージ内面の樹脂層が破断して集電体とアル
ミニウム芯材が接触するのを防ぐ効果がある。Reference numeral 8 denotes a mold provided in the package film 1 on the front side in advance, which is effective for positioning the power generation element storage and also prevents tension from being applied to the package film during sealing. This has the effect of preventing the resin layer on the inner surface of the package abutting on the current collector edge from breaking and preventing the current collector from contacting the aluminum core material.
【００２３】図３は、端子取り出し辺に隣接する辺が融
着封止され、樹脂フィルム３が端子と融着部が重なる面
の他、集電体６の肩部６’を覆っている例を示す図であ
る。FIG. 3 shows an example in which the side adjacent to the terminal take-out side is fusion-sealed, and the resin film 3 covers the shoulder 6 ′ of the current collector 6 in addition to the surface where the terminal and the fusion part overlap. FIG.
【００２４】隣接する辺を融着封止する場合は、融着部
と電極肩部が近接しており、融着工程での熱が肩部に伝
わる。また融着工程で、表裏のパッケージフィルムの融
着面を押圧する時に内包する発電要素の厚さに応じて、
パッケージフィルムに張力が加わる。このような熱およ
び張力が加わると、集電体のエッジが当接する部分で、
パッケージフィルム内面の融着樹脂層が破断し、集電体
とアルミニウム芯材が接触して短絡に至る恐れがあっ
た。When the adjacent sides are sealed by fusion, the fusion portion and the electrode shoulder are close to each other, and heat in the fusion process is transmitted to the shoulder. Also, in the fusing step, according to the thickness of the power generation element included when pressing the fusing surface of the front and back package films,
Tension is applied to the package film. When such heat and tension are applied, where the edges of the current collector abut,
The fusion resin layer on the inner surface of the package film was broken, and the current collector and the aluminum core material came into contact with each other, possibly resulting in a short circuit.
【００２５】本発明では、図３に示すように、端子部の
みでなく、集電体の肩部６’も樹脂フィルム３で覆って
いるので、集電体エッジとアルミニウム芯材が接触する
のを防ぐことができる。In the present invention, as shown in FIG. 3, not only the terminal portion but also the shoulder 6 'of the current collector is covered with the resin film 3, so that the current collector edge and the aluminum core material come into contact with each other. Can be prevented.
【００２６】また、図に示したように、樹脂フィルム
３’の端部を隣接辺の融着部に位置させ、隣接辺の融着
と同時に融着することにより、隙間が生じ易い樹脂フィ
ルム側面の気密をより完全にすることが可能である。さ
らに図４に示すように、パッケージフィルム１と樹脂フ
ィルム３の幅を同一にすることにより、フィルムをパッ
ケージ内面に固定する工程での位置決めが容易にできる
利点がある。Further, as shown in the figure, the end of the resin film 3 'is located at the fusion part on the adjacent side, and the fusion is performed simultaneously with the fusion on the adjacent side, so that the side surface of the resin film where a gap is apt to occur is formed. It is possible to make the airtightness of the vehicle more complete. Further, as shown in FIG. 4, by making the width of the package film 1 and that of the resin film 3 the same, there is an advantage that the positioning in the step of fixing the film to the inner surface of the package can be facilitated.
【００２７】通常、正極集電体の材質はアルミニウムで
あり、負極集電体は銅であるが、アルミニウムの場合は
半田付けが困難であり、また、機械的強度が劣るという
欠点がある。銅の場合は耐錆性が劣るという欠点があ
る。Normally, the material of the positive electrode current collector is aluminum and the material of the negative electrode current collector is copper. In the case of aluminum, however, soldering is difficult and mechanical strength is poor. Copper has the disadvantage of poor rust resistance.
【００２８】これらの欠点を解消するため、ニッケル片
を端子とし、該ニッケル片と集電体を抵抗溶接や超音波
溶接等で接続する構造が採られる。集電体には、端子接
続用のタブが設けられる。In order to solve these drawbacks, a structure is adopted in which a nickel piece is used as a terminal and the nickel piece and the current collector are connected by resistance welding, ultrasonic welding, or the like. A tab for terminal connection is provided on the current collector.
【００２９】図５は、上記タブ付き集電体の例を示す図
である。図で４’、５’が各々正極集電体４、負極集電
体５に設けられたタブであり、それぞれニッケル片製の
正極端子４、負極端子５に接続している。本発明では、
図５に示すように、樹脂フィルム３はタブ部全体を覆っ
ている。FIG. 5 is a diagram showing an example of the above-mentioned current collector with tabs. In the figure, reference numerals 4 'and 5' denote tabs provided on the positive electrode current collector 4 and the negative electrode current collector 5, respectively, which are connected to the positive electrode terminal 4 and the negative electrode terminal 5 made of nickel pieces, respectively. In the present invention,
As shown in FIG. 5, the resin film 3 covers the entire tab portion.
【００３０】集電体の厚さが数十〜１００μｍと非常に
薄い場合、端子と集電体の接続部の強度が弱いという欠
点があったが、本発明のように接続部全体を融着フィル
ムで覆い、全体を融着した構造とすることににより、強
度不足を補うことができる。また、本構造では、端子の
厚さ分、タブ部に突出が生じ、パッケージ内面樹脂層の
破断による短絡が生じ易くなるが、接続部を覆うように
樹脂フィルムが配置されていることにより、前例同様、
短絡を防止することができる。When the thickness of the current collector is extremely small, several tens to 100 μm, there is a disadvantage that the strength of the connection between the terminal and the current collector is weak. However, as in the present invention, the entire connection is fused. Covering with a film and having a structure in which the whole is fused can compensate for insufficient strength. Further, in this structure, the tab portion protrudes by the thickness of the terminal, and a short circuit easily occurs due to the breakage of the resin layer on the inner surface of the package. However, since the resin film is arranged to cover the connection portion, Similarly,
Short circuit can be prevented.
【００３１】[0031]
【発明の効果】以上本発明に係る扁平型電池は、振動、
衝撃、曲げが加わっても短絡やシール破壊の無い信頼性
に優れ、組立が容易で生産性が高く安価で工業的価値の
高いものである。As described above, the flat battery according to the present invention has vibration,
It is excellent in reliability without short circuit and seal breakage even when subjected to impact or bending, easy to assemble, high in productivity, inexpensive and of high industrial value.
【図１】本発明の１実施形態を示す外観図であるFIG. 1 is an external view showing one embodiment of the present invention.
【図２】図１の内面図であるFIG. 2 is an inner view of FIG.
【図３】本発明の他の実施形態を示す内面図であるFIG. 3 is an inner view showing another embodiment of the present invention.
【図４】本発明の他の実施形態における樹脂フィルムと
パッケージフィルムの関係を示す説明図である。FIG. 4 is an explanatory diagram showing a relationship between a resin film and a package film in another embodiment of the present invention.
【図５】本発明のさらに他の実施形態を示す内面図であ
るFIG. 5 is an inner view showing still another embodiment of the present invention.
１ パッケージフィルム ２ パッケージ周縁部の融着部 ３ 融着性樹脂フィルム ４ 正極端子 ５ 負極端子 DESCRIPTION OF SYMBOLS 1 Package film 2 Fused part of package peripheral part 3 Fusing resin film 4 Positive electrode terminal 5 Negative electrode terminal
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H011 AA04 AA17 CC02 DD12 FF04 GG09 HH02 JJ03 JJ12 5H022 AA09 BB03 BB12 CC03 CC08 CC09 CC12 CC16 EE06 EE07 KK03 KK08 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H011 AA04 AA17 CC02 DD12 FF04 GG09 HH02 JJ03 JJ12 5H022 AA09 BB03 BB12 CC03 CC08 CC09 CC12 CC16 EE06 EE07 KK03 KK08
Claims (5)
れたパッケージに発電要素が内包され、正極および負極
の端子が該融着部を貫通してなる扁平型電池において、
端子とパッケージの間の少なくとも端子と融着部が重な
る位置に、融着性樹脂フィルムが挿入されていることを
特徴とする扁平型電池1. A flat battery in which a power generation element is included in a package in which at least one side is sealed by resin fusion, and a positive electrode terminal and a negative electrode terminal pass through the fusion portion.
A flat battery, wherein a fusible resin film is inserted at least between the terminal and the package at a position where the terminal and the fusion portion overlap.
ち、少なくとも片面に融着性樹脂フィルムが挿入されて
なる請求項１記載の扁平型電池2. The flat type battery according to claim 1, wherein a fusible resin film is inserted into at least one of two front and back surfaces of the terminal and the package in contact with each other.
し、該貫通部に隣接する両方もしくは片方の辺が樹脂融
着により封止された電池であって、端子とパッケージの
間に挿入された融着性樹脂フィルムが極群の肩部を覆っ
ていることを特徴とする請求項２記載の扁平型電池3. A battery in which a positive electrode terminal and a negative electrode terminal penetrate a resin-fused portion, and both or one side adjacent to the penetrated portion is sealed by resin fusion, and is inserted between the terminal and the package. 3. The flat battery according to claim 2, wherein the fused resin film covers the shoulders of the electrode group.
体に端子接続用タブ部が形成されており、端子とパッケ
ージの間に挿入された融着性樹脂フィルムが、該タブ部
を覆っていることを特徴とする請求項２記載の扁平型電
池4. A terminal connecting tab portion is formed on at least one of the positive electrode and the negative electrode current collectors, and a fusible resin film inserted between the terminal and the package covers the tab portion. The flat type battery according to claim 2, wherein
性樹脂フィルムを、あらかじめパッケージ内面に固定す
ることを特徴とする請求項１〜４のいずれかに記載の扁
平型電池の製造方法5. The method for manufacturing a flat battery according to claim 1, wherein a fusible resin film inserted between the terminal and the package is fixed to an inner surface of the package in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20940099A JP4670120B2 (en) | 1999-07-23 | 1999-07-23 | Flat battery and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20940099A JP4670120B2 (en) | 1999-07-23 | 1999-07-23 | Flat battery and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001035477A true JP2001035477A (en) | 2001-02-09 |
| JP4670120B2 JP4670120B2 (en) | 2011-04-13 |
Family
ID=16572277
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20940099A Expired - Fee Related JP4670120B2 (en) | 1999-07-23 | 1999-07-23 | Flat battery and manufacturing method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP4670120B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003086170A (en) * | 2001-09-10 | 2003-03-20 | Mitsubishi Chemicals Corp | Lead component |
| JP2012209125A (en) * | 2011-03-29 | 2012-10-25 | Fdk Tottori Co Ltd | Thin-film electrochemical element |
| KR101812376B1 (en) | 2014-02-17 | 2018-01-31 | 한국에너지기술연구원 | Sealing Material, Flexible Thin-film type Super-Capacitor Device Manufacturing Method having the same and Super-Capacitor Device thereof |
| KR101812386B1 (en) | 2015-10-26 | 2018-01-31 | 한국에너지기술연구원 | Sealing Material and Super-Capacitor Device thereof |
| WO2022034995A1 (en) * | 2020-08-14 | 2022-02-17 | 주식회사 엘지에너지솔루션 | Electrode assembly comprising anode and anode sheet having improved electrode stacking properties and manufacturing method therefor |
| WO2023022560A1 (en) * | 2021-08-19 | 2023-02-23 | 주식회사 엘지에너지솔루션 | Electrode assembly having coating portion for short-circuit prevention |
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| JPH0256855A (en) * | 1988-05-20 | 1990-02-26 | Seiko Electronic Components Ltd | Flat type cell |
| JPH11167913A (en) * | 1997-12-04 | 1999-06-22 | Matsushita Electric Ind Co Ltd | Connecting method for stacked electrodes for battery and the battery |
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1999
- 1999-07-23 JP JP20940099A patent/JP4670120B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6261268A (en) * | 1985-09-10 | 1987-03-17 | Toppan Printing Co Ltd | Flat-type electrochemical cell |
| JPH0256855A (en) * | 1988-05-20 | 1990-02-26 | Seiko Electronic Components Ltd | Flat type cell |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003086170A (en) * | 2001-09-10 | 2003-03-20 | Mitsubishi Chemicals Corp | Lead component |
| JP2012209125A (en) * | 2011-03-29 | 2012-10-25 | Fdk Tottori Co Ltd | Thin-film electrochemical element |
| KR101812376B1 (en) | 2014-02-17 | 2018-01-31 | 한국에너지기술연구원 | Sealing Material, Flexible Thin-film type Super-Capacitor Device Manufacturing Method having the same and Super-Capacitor Device thereof |
| KR101812386B1 (en) | 2015-10-26 | 2018-01-31 | 한국에너지기술연구원 | Sealing Material and Super-Capacitor Device thereof |
| WO2022034995A1 (en) * | 2020-08-14 | 2022-02-17 | 주식회사 엘지에너지솔루션 | Electrode assembly comprising anode and anode sheet having improved electrode stacking properties and manufacturing method therefor |
| WO2023022560A1 (en) * | 2021-08-19 | 2023-02-23 | 주식회사 엘지에너지솔루션 | Electrode assembly having coating portion for short-circuit prevention |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4670120B2 (en) | 2011-04-13 |
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