JPH06333551A - Battery - Google Patents

Abstract

PURPOSE:To easily provide a battery capacity according to a requirement, and facilitate the parallel connection of cells by providing a notched part or recessed part on at least a part of the connecting part of a series of battery in which a plurality of thin cells are connected to each other. CONSTITUTION:The number of thin unit cells 1 constituting a series of battery is regulated, whereby a battery with an optional capacity can be provided, and a layered form can be easily formed by a notched part 12 or a recessed part 9 without giving a form change to the cell element of the cell 1 even when it is bent. For example, in the battery consisting of a plurality of cells 1, the cells are cut so that one is connected in the lateral direction, and two in the longitudinal direction to provide a notch part 12 on an adhesive material 7 surface situated on a slit. In this case, the notched part 12 is formed along the swollen part 7' of the material 7, whereby the peeling from a current collector is prevented, and electrical insulation with a counter electrode can be held. By bending in the part 12, the connection by use of a connecting terminal is not required, and reduction in man-hour and increase in resistance between cells can be prevented.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、ファッション、玩具、
電子機器などの分野に利用される電池に関するものであ
る。The present invention relates to fashion, toys,
The present invention relates to a battery used in the field of electronic devices and the like.

【０００２】[0002]

【従来の技術】従来、例えば電子機器に用いる電池の容
量を大きくする場合、電池を数個積層し、個々の電池を
それぞれ並列に接続するため接続端子が必要であった
り、またその接続端子を付けるための工数及び接続端子
分だけ総電池厚さが大きくなり、機器の電池スペ−スを
大きくするなど問題があった。また、従来の電池はそれ
ぞれ形状が固定されており、その都度、電池製造工程及
び金型などを変更する必要があり、迅速なる電池機種変
更が困難であった。2. Description of the Related Art Conventionally, when increasing the capacity of a battery used in electronic equipment, for example, a plurality of batteries are stacked and connection terminals are required to connect the individual batteries in parallel. There is a problem that the total battery thickness is increased by the number of man-hours for attaching and the connecting terminals, and the battery space of the device is increased. Further, the conventional batteries have a fixed shape, and it is necessary to change the battery manufacturing process, the mold, and the like each time, which makes it difficult to quickly change the battery model.

【０００３】[0003]

【発明が解決しようとする課題】本発明は上記問題点に
鑑みてなされたものであって、その目的とするところは
必要に応じた電池容量を容易に得ることができると共
に、電池の並列接続を容易にするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to easily obtain a required battery capacity and to connect batteries in parallel. To facilitate.

【０００４】[0004]

【課題を解決するための手段】本発明は上記目的を達成
するもので、上下面の集電体間に正極活物質、セパレ−
タ、負極活物質などからなる電池要素が配置されその周
縁が接着材で封口接着された薄形素電池を複数個、該接
着材及び集電体部分で連結した一連の電池の該連結部分
の少なくとも一部に切り込み部又は凹み部分を設けたこ
と、前記薄形素電池の厚さが１．０ｍｍ以下、最適には
０．１５ｍｍ乃至０．５ｍｍであること、前記切り込み
部又は凹み部分で折り曲げること、前記連結部分の集電
体にスリットが設けられていること及び前記個々の薄形
素電池の角部に端子部としての矩形穴が集電体及び接着
材に設けられていることなどを特徴とするもので、これ
らにより上述の問題点を解決するものである。Means for Solving the Problems The present invention achieves the above-mentioned object, and a positive electrode active material and a separator are provided between current collectors on the upper and lower surfaces.
A plurality of thin unit cells in which battery elements made of a battery, a negative electrode active material, etc. are arranged and the periphery of which is sealed and adhered by an adhesive, and a series of batteries connected by the adhesive and the collector part At least a portion provided with a notch or a recess, the thin unit cell having a thickness of 1.0 mm or less, optimally 0.15 mm to 0.5 mm, and bending at the notch or the recess That the current collector of the connecting portion is provided with a slit and that rectangular holes as terminal portions are provided in the current collector and the adhesive at the corners of the individual thin unit cells. This is a feature and solves the above problems.

【０００５】[0005]

【作用】請求項１及び３により一連の電池を構成する薄
形電池の個数を調整することで、任意の電池容量の電池
が得られ且つ切り込み部又は凹部により折り曲げても薄
形電池の電池要素に形状変化（正極活物質と負極活物質
が短絡する場合がある。）を与えることがなく、容易に
積層形状にすることができる。例えば薄形電池の１個の
電池容量が約１０ｍＡｈとすると、８個折り畳めば約８
０ｍＡｈの電池が得られる。また２個ずつ折り畳めば、
厚さは半分で同じ容量の電池が得られる。さらにこのよ
うな一連の電池は生産工程で切り取る薄形電池の数を任
意に変更でき、各種電池形状及び電池容量に対応したも
のが得られ、少量多機種の生産要請に対処できるものと
なる。また該切り込み部及び凹部で必要に応じて引きち
ぎることもできる。請求項２により該切り込み又は凹部
で折り曲げる場合、薄形電池の電池要素に前記した変形
を与えても支障のない最大厚みが約１ｍｍであり、１ｍ
ｍより大きい場合は折り曲げが完全でなく、隙間ができ
無理やり曲げると変形し内部短絡する場合がある。さら
に折り曲げにおいては薄形電池の厚さが０．１５ｍｍ乃
至０．５ｍｍであると折り曲げによる薄形電池変形がな
い。なお０．１ｍｍでは集電体の厚さを薄くする必要が
あり、電池製造コストを高める。下表に薄形電池の各厚
みと折り曲げ後の電池解体調査（特に電池要素の角部、
即ち接着材との境界付近の正極活物質の形状変化、特に
厚さ変化を調査した。）結果を表１に示す。なお、試験
した電池数は各３０セルである。By adjusting the number of thin batteries constituting a series of batteries according to claims 1 and 3, a battery having an arbitrary battery capacity can be obtained and the battery element of the thin battery can be bent by the notch or the recess. It is possible to easily form a laminated shape without giving a shape change (the positive electrode active material and the negative electrode active material may be short-circuited). For example, if one thin battery has a battery capacity of about 10 mAh, folding it into about 8 will give about 8
A 0 mAh battery is obtained. If you fold it again,
A battery with the same capacity can be obtained with half the thickness. Further, in such a series of batteries, the number of thin batteries to be cut out in the production process can be arbitrarily changed, and batteries corresponding to various battery shapes and battery capacities can be obtained, and it becomes possible to meet the production demands of a small number of various models. Further, the cut portion and the concave portion can be torn off if necessary. In the case of bending at the notch or the recess according to claim 2, the maximum thickness which does not hinder the deformation of the battery element of the thin battery is about 1 mm and 1 m.
If it is larger than m, the bending may not be complete, and a gap may be created, and if it is forcibly bent, it may be deformed and an internal short circuit may occur. Further, in bending, when the thickness of the thin battery is 0.15 mm to 0.5 mm, deformation of the thin battery due to bending does not occur. If the thickness is 0.1 mm, it is necessary to reduce the thickness of the current collector, which increases the battery manufacturing cost. The table below shows the thickness of thin batteries and the battery disassembly survey after bending (particularly the corners of the battery element,
That is, the change in shape of the positive electrode active material near the boundary with the adhesive, particularly the change in thickness, was investigated. ) The results are shown in Table 1. The number of batteries tested was 30 cells each.

【０００６】 [0006]

【０００７】請求項４により折り曲げに対して、あらか
じめ集電体が部分的に切断されているため折り曲げ部分
での集電体の変形がなく、接着材との接着不良が発生し
ない。また折り曲げ部の金属部分が少ないため、容易に
折り曲げができる。請求項５により、即ち個々の薄形素
電池の角部に端子部としての矩形穴を集電体及び接着材
に設けることにより、一連の電池から必要に応じて薄形
電池の個数を決め切断しても各薄形電池に端子部が形成
されているため、任意の箇所から電池の端子を取り出す
ことができる。片側の集電体に矩形穴を設け且つ該位置
に相当する接着材にも矩形穴を設けることで、対極の集
電体の内面が露出しその面が端子となる。また対極の集
電体の他の角部及び接着材に同じような矩形穴を設ける
ことで、上記片側の集電体面が露出し端子とできる。該
各矩形穴は同一方向又は対角方向に形成することができ
る。According to the fourth aspect of the invention, since the current collector is partially cut in advance for bending, the current collector is not deformed at the bent portion, and no defective adhesion with the adhesive material occurs. Further, since the bent portion has a small metal portion, it can be easily bent. According to claim 5, that is, by arranging rectangular holes as terminals in the collector and the adhesive at the corners of each thin cell, the number of thin cells can be determined and cut from a series of cells as necessary. However, since the terminal portion is formed on each thin battery, the battery terminal can be taken out from any position. By forming a rectangular hole in the current collector on one side and also by forming a rectangular hole in the adhesive material corresponding to the position, the inner surface of the current collector of the counter electrode is exposed and the surface serves as a terminal. Further, by providing similar rectangular holes in the other corners of the current collector of the counter electrode and the adhesive material, the current collector surface on one side is exposed to form a terminal. The rectangular holes can be formed in the same direction or diagonal directions.

【０００８】[0008]

【実施例】以下、本発明の実施例を説明する。図１は厚
さ約０．２ｍｍの薄形素電池１が縦及び横方向に複数個
連結した一連の電池２の一部拡大平面図である。図２は
図１のＡ−Ａ’部における拡大断面図で、図３は同じく
Ｂ−Ｂ’部の拡大断面図である。負極集電体３（例えば
厚さ２０μのステンレス、銅など）面に負極活物質４
（例えばリチウム、リチウム合金、カ−ボンなど）を約
３０μの厚さ、縦約１８ｍｍ、横約１１ｍｍに配置し、
さらにその上に高分子固体電解質５層を約１０μの厚さ
に配置し、さらに正極活物質６（例えば二酸化マンガ
ン、酸化コバルトなどを主剤とする伝導材を含む合剤）
を厚さ約１２０μに印刷した。次に格子状のパタ−ン穴
を設けた厚さ約２００μの接着材７（例えば変性ポリプ
ロピレンなど）を配置し、負極集電体３面に仮接着し
た。さらに厚さ約２μのアンダ−コ−ト処理を施した正
極集電体８を上から重ね合わせ接着材７と接着した。こ
の最終接着においては電池内部にガスが残存しないよう
に電池要素に対向する集電体面を熱絶縁・弾力性部材で
加圧し、ガス抜きしながら行った。また正極集電体８及
び接着材７の各角部には三角形の穴９をあらかじめ設け
ておいた。穴９に対応する負極集電体３面が負極端子１
０として利用できる。なおこのガス抜きは接着材７を正
極集電体８と本接着する前にロ−ル掛けにより行っても
よい。EXAMPLES Examples of the present invention will be described below. FIG. 1 is a partially enlarged plan view of a series of batteries 2 in which a plurality of thin unit cells 1 having a thickness of about 0.2 mm are connected in the vertical and horizontal directions. 2 is an enlarged sectional view taken along the line AA 'in FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line BB'. The negative electrode active material 4 is formed on the surface of the negative electrode current collector 3 (for example, stainless steel having a thickness of 20 μ, copper, etc.).
Arrange (for example, lithium, lithium alloy, carbon, etc.) in a thickness of about 30 μ, length of about 18 mm, width of about 11 mm,
Further, 5 layers of solid polymer electrolyte are further arranged thereon to a thickness of about 10 μm, and the positive electrode active material 6 (for example, a mixture containing a conductive material mainly containing manganese dioxide, cobalt oxide, etc.)
Was printed to a thickness of about 120μ. Next, an adhesive material 7 (for example, modified polypropylene or the like) having a grid-like pattern hole and a thickness of about 200 μm was arranged and temporarily adhered to the surface of the negative electrode current collector 3. Further, a positive electrode current collector 8 having a thickness of about 2 μm and subjected to an undercoat treatment was overlaid and bonded to the adhesive 7. In this final adhesion, the surface of the current collector facing the battery element was pressurized by a heat insulating / elastic member so that no gas remained inside the battery, and degassing was performed. In addition, triangular holes 9 are provided in advance at the corners of the positive electrode current collector 8 and the adhesive material 7. The surface of the negative electrode current collector 3 corresponding to the hole 9 is the negative electrode terminal 1
It can be used as 0. This degassing may be performed by rolling before the adhesive 7 is permanently bonded to the positive electrode current collector 8.

【０００９】正極集電体８には幅約０．５ｍｍのスリッ
ト１１が打ち抜きなどの手段で設けられている。なお正
極集電体８のスリット１１が途切れている連結部に対向
する負極集電体３部分には同様なスリットが設けられて
いる。次にこのようにして作製された複数個の薄形電池
１からなる電池２において幅方向に１個、長さ方向に２
個連結するよう切断した。さらにスリット１１に位置す
る接着材７面をトムソン刃により切り込み１２を設け
た。この時、接着材７の盛り上がり部７’がスリット１
１に沿って形成された。この盛り上がり部７’により集
電体との剥離が防止され、且つ対極との電気的絶縁を保
つ。次に切り目部分１２で折り曲げた状態の電池１３を
図４の斜視図に示す。このような電池１３により電池間
を接続端子で連結する必要がなく、工数削減及び電池間
抵抗増加防止などが計られる。また電池自体が薄いた
め、機器の隙間に押し込むだけで収納と電気的接続が達
成される。なお薄形素電池を２個以上使用して折り曲げ
る場合、切り目又は凹部を正極集電体と負極集電体側で
交互に施すと折り曲げに際して、薄形素電池の形状変化
が低減される。The positive electrode current collector 8 is provided with a slit 11 having a width of about 0.5 mm by means such as punching. A similar slit is provided in the portion of the negative electrode current collector 3 facing the connecting portion where the slit 11 of the positive electrode current collector 8 is interrupted. Next, in the battery 2 made up of a plurality of thin batteries 1 thus manufactured, one in the width direction and 2 in the length direction.
It cut so that it might connect. Further, the adhesive 7 surface located in the slit 11 was provided with a notch 12 by a Thomson blade. At this time, the swelling portion 7'of the adhesive 7 is slit 1
1 was formed. This raised portion 7'prevents separation from the current collector and maintains electrical insulation with the counter electrode. Next, the battery 13 folded in the cut portion 12 is shown in the perspective view of FIG. With such a battery 13, it is not necessary to connect the batteries with connecting terminals, and the number of steps can be reduced and the resistance between the batteries can be prevented from increasing. Also, since the battery itself is thin, it can be stored and electrically connected simply by pushing it into the gap between the devices. When two or more thin unit cells are used for bending, if the cuts or recesses are alternately provided on the positive electrode current collector side and the negative electrode current collector side, the shape change of the thin unit cells can be reduced during bending.

【００１０】[0010]

【発明の効果】上述した以外に本発明においては以下の
ような効果を有する。 （１）任意の形状に作製できる。 （２）接着材の剥離が防止できる。 （３）量産に適している。 なお本発明においては薄形素電池の材質・幅・長さ・
数、スリットの位置・幅・長さ、電池要素の種類・大き
さ・厚さ、切り込み・凹部形成の手段・幅・深さ、及び
電池の薄形素電池数など特に限定するものではない。In addition to the above, the present invention has the following effects. (1) It can be produced in any shape. (2) The peeling of the adhesive can be prevented. (3) Suitable for mass production. In the present invention, the material, width and length of the thin cell are
The number, the position / width / length of the slit, the type / size / thickness of the battery element, the means / width / depth of the notch / recess, and the number of thin unit cells of the battery are not particularly limited.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係わる薄形素電池が連結された一連の
電池を示す平面図である。FIG. 1 is a plan view showing a series of batteries to which thin cell batteries according to the present invention are connected.

【図２】図１のＡ−Ａ’部の断面図である。2 is a cross-sectional view taken along the line A-A 'in FIG.

【図３】図１のＢ−Ｂ’部の断面図である。3 is a cross-sectional view of a B-B 'portion in FIG.

【図４】本発明による折り畳まれた状態の電池斜視図で
ある。FIG. 4 is a perspective view of a battery in a folded state according to the present invention.

【符号の説明】[Explanation of symbols]

１ 薄形素電池 ２、１３ 一連の電池 ３ 負極集電体 ７ 接着材 ８ 正極集電体 ９ 矩形穴 １０ 端子部 １１ スリット １２ 切り込み部 DESCRIPTION OF SYMBOLS 1 Thin cell battery 2 and 13 A series of batteries 3 Negative electrode collector 7 Adhesive material 8 Positive electrode collector 9 Rectangular hole 10 Terminal part 11 Slit 12 Notch part

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 上下面の集電体間に正極活物質、セパレ
−タ、負極活物質からなる電池要素が配置されその周縁
が接着材で封口接着された薄形素電池を複数個、該接着
材及び集電体部分で連結した一連の電池の該連結部分の
少なくとも一部に切り込み部又は凹み部分を設けたこと
を特徴とする電池。1. A plurality of thin unit cells in which a battery element composed of a positive electrode active material, a separator, and a negative electrode active material is disposed between upper and lower current collectors, and the periphery of which is sealed and adhered with an adhesive. A battery, characterized in that a series of batteries connected by an adhesive and a current collector portion is provided with a notch or a recess at least at a part of the connected portion. 【請求項２】 前記薄形素電池の厚さが１．０ｍｍ以下
であることを特徴とする請求項１記載の電池。2. The battery according to claim 1, wherein the thin unit cell has a thickness of 1.0 mm or less. 【請求項３】 前記切り込み部又は凹み部分で折り曲げ
たことを特徴とする請求項１記載の電池。3. The battery according to claim 1, wherein the battery is bent at the notch or the recess. 【請求項４】 前記連結部分の集電体にスリットが設け
られていることを特徴とする請求項１記載の電池。4. The battery according to claim 1, wherein the current collector at the connecting portion is provided with a slit. 【請求項５】 前記個々の薄形素電池の角部に端子部と
しての矩形穴が集電体及び接着材に設けられていること
を特徴とする請求項１記載の電池。5. The battery according to claim 1, wherein rectangular holes as terminal portions are provided in the current collector and the adhesive material at the corners of the individual thin unit cells.