JPH05135777A - Manufacture of cylindrical alkaline battery - Google Patents
Manufacture of cylindrical alkaline batteryInfo
- Publication number
- JPH05135777A JPH05135777A JP3319610A JP31961091A JPH05135777A JP H05135777 A JPH05135777 A JP H05135777A JP 3319610 A JP3319610 A JP 3319610A JP 31961091 A JP31961091 A JP 31961091A JP H05135777 A JPH05135777 A JP H05135777A
- Authority
- JP
- Japan
- Prior art keywords
- separator
- melt resin
- hot
- cylindrical
- battery case
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/08—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with cup-shaped electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
- H01M50/469—Separators, membranes or diaphragms characterised by their shape tubular or cylindrical
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Primary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Cell Separators (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、筒状セパレータの底部
を絶縁物質によって閉塞するうえでの不具合を防止した
筒形アルカリ電池の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cylindrical alkaline battery which prevents a problem in closing the bottom of a cylindrical separator with an insulating material.
【０００２】[0002]
【従来の技術】一般に筒形アルカリ電池は、底部を閉塞
した筒状の電池ケースの内周部に正極合剤を装填し、該
正極合剤の内周部に筒状のセパレータを介して負極活物
質を装填し、次いで負極集電棒を負極活物質の中心に挿
通し、封口ガスケットを介して負極端子板を電池ケース
の開口に装着し、周囲をカシメ付けることで完成され
る。2. Description of the Related Art Generally, in a cylindrical alkaline battery, a positive electrode mixture is loaded in the inner peripheral portion of a cylindrical battery case having a closed bottom portion, and a negative electrode is inserted in the inner peripheral portion of the positive electrode mixture through a cylindrical separator. It is completed by loading the active material, then inserting the negative electrode current collector rod into the center of the negative electrode active material, mounting the negative electrode terminal plate in the opening of the battery case through the sealing gasket, and caulking the periphery.
【０００３】この種の構造の電池では、前記負極活物質
の装填以前の段階で前記セパレータの底部開口を絶縁物
質で閉塞する必要があり、絶縁物質としてホットメルト
樹脂が一般に用いられている。このホットメルト樹脂を
用いたセパレータの底部閉塞方法は、例えば特公昭６３
−４１１９０号公報に開示されているように、ケースを
回転させつつノズルを通じて溶融したホットメルト樹脂
をセパレータの内周底部に注入し、次いで気体圧力ある
いはロッドによる加圧力によって流動状態のホットメル
ト樹脂を加圧展開してセパレータの底部開口を閉塞して
いた。しかしながら、この底部閉塞方法では以下の問題
があった。In a battery of this type of structure, it is necessary to close the bottom opening of the separator with an insulating material before the loading of the negative electrode active material, and a hot melt resin is generally used as the insulating material. A method of closing the bottom of a separator using this hot melt resin is described in, for example, Japanese Patent Publication No.
As disclosed in JP-A-41190, a hot melt resin melted through a nozzle is injected into a bottom portion of an inner circumference of a separator while rotating a case, and then a hot melt resin in a fluidized state is melted by a gas pressure or a pressure applied by a rod. It was expanded under pressure to close the bottom opening of the separator. However, this bottom closing method has the following problems.
【０００４】[0004]
【発明が解決しようとする課題】すなわち、この閉塞方
法ではノズル先端の目詰りなどが原因となる注入不良
や、加圧展開時における不具合が生じていた。図２
（ａ），（ｂ）は、注入時および気体加圧時における不
具合を示すもので、１は底部閉塞した筒状の電池ケー
ス、２は電池ケース１の内周部に装填された正極合剤、
３は正極合剤２の内周部に装填された両端開口の筒状の
セパレータである。ホットメルト樹脂の注入時にはセパ
レータ３の内周部に注入用ノズル４を挿通し、その先端
より溶融した適正量のホットメルト樹脂５を注入してい
た。In other words, in this closing method, there were problems such as poor injection due to clogging of the nozzle tip and problems during pressure deployment. Figure 2
(A) and (b) show defects at the time of injection and gas pressurization, 1 is a cylindrical battery case with a bottom closed, and 2 is a positive electrode mixture loaded in the inner peripheral portion of the battery case 1. ,
Reference numeral 3 is a cylindrical separator having an opening at both ends, which is loaded in the inner peripheral portion of the positive electrode mixture 2. At the time of injecting the hot melt resin, the injection nozzle 4 was inserted into the inner peripheral portion of the separator 3 and an appropriate amount of the melted hot melt resin 5 was injected from the tip thereof.
【０００５】そして、ノズル４が正常の場合にはホット
メルト樹脂５はケース１の底部に溜まるが、ノズル４に
目詰りなどが生じている場合には、図２（ａ）に示すよ
うに、樹脂５の一部が飛散してセパレータ５の内周部に
付着し、反応面積を減少させ、電池性能の低下を招来す
る惧れがあった。When the nozzle 4 is normal, the hot melt resin 5 collects at the bottom of the case 1, but when the nozzle 4 is clogged, as shown in FIG. There is a possibility that a part of the resin 5 may be scattered and adhered to the inner peripheral portion of the separator 5 to reduce the reaction area, resulting in deterioration of battery performance.
【０００６】また、気体による加圧展開時には吹き付け
ノズル６が用いられるが、気体の圧力調整が困難であ
り、セパレータ３の奥まで加圧気体が届きにくくなるた
め、図２（ｂ）に示すように、一部空隙５ａが生ずるな
ど閉塞が不充分で絶縁不良となる惧れがあった。さら
に、ロッドを使用して樹脂を展開した場合には、ホット
メルト樹脂がロッドに粘着し、ロッド引上げ時にこの樹
脂がセパレータ内面に付着し、同じく反応面積が低下す
る原因となっていた。Further, although the spray nozzle 6 is used at the time of pressure development with gas, it is difficult to adjust the pressure of the gas and it becomes difficult for the pressurized gas to reach the back of the separator 3, so that as shown in FIG. 2 (b). In addition, there is a possibility that the insulation may be poor due to insufficient blockage such as the formation of the void 5a. Further, when the resin is spread using the rod, the hot melt resin adheres to the rod and adheres to the inner surface of the separator when the rod is pulled up, which also causes a decrease in the reaction area.
【０００７】本発明は、以上の問題を解決するものであ
って、その目的は、セパレータの閉塞時において、ホッ
トメルト樹脂のセパレータ内面への付着を防止するとと
もに、セパレータの底部開口を確実に閉塞できる筒状ア
ルカリ電池の製造方法を提供することにある。The present invention is intended to solve the above problems, and an object thereof is to prevent the hot melt resin from adhering to the inner surface of the separator when the separator is closed and to reliably close the bottom opening of the separator. An object of the present invention is to provide a method of manufacturing a cylindrical alkaline battery that can be used.
【０００８】[0008]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、上部開口した筒状の電池ケースの内周部
に正極合剤を装填し、該正極合剤の内周部に筒状のセパ
レータを装填し、該セパレータの底部開口を絶縁物質で
閉塞する工程を含む筒形アルカリ電池の製造方法におい
て、前記絶縁物質はホットメルト樹脂から構成され、固
形状の該ホットメルト樹脂を前記セパレータの底部開口
内部に投入し、続いて前記電池ケースの底面を加熱する
ことにより前記ホットメルト樹脂を溶融させ、次いで冷
却することにより前記筒状セパレータの底部開口縁部に
結着させて底部開口を閉塞するものである。In order to achieve the above object, according to the present invention, a positive electrode material mixture is loaded in the inner peripheral portion of a cylindrical battery case having an upper opening, and the positive electrode material mixture is inserted in the inner peripheral portion. In a method for manufacturing a tubular alkaline battery, which comprises a step of loading a separator in the shape of a ring and closing the bottom opening of the separator with an insulating material, the insulating material is composed of hot melt resin, and the solid hot melt resin is It is charged into the bottom opening of the separator, and then the bottom surface of the battery case is heated to melt the hot melt resin, and then cooled to bind to the bottom opening edge of the tubular separator to form the bottom opening. Is to block.
【０００９】[0009]
【作用】以上の構成によれば、ホットメルト樹脂は固形
状態で投入されるので、注入用ノズルを必要としない。
また、前記ホットメルト樹脂は電池ケースの底部を加熱
することによって溶融流動し、セルフレベリング化の後
に冷却により固化し、セパレータの底部開口を閉塞す
る。According to the above construction, the hot melt resin is charged in a solid state, so that an injection nozzle is not required.
The hot-melt resin melts and flows by heating the bottom of the battery case, solidifies by cooling after self-leveling, and closes the bottom opening of the separator.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図面を用いて詳細
に説明する。図１（ａ）〜（ｄ）は本発明による筒形ア
ルカリ電池の製造順序を示している。図１（ａ）におい
て、上部開口した金属製の正極端子部を構成する電池ケ
ース１０の内周部には円筒状に成形された正極合剤１２
が装填され、この正極合剤１２の内周部には上下開口し
た筒状のセパレータ１４が装填される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 (a) to 1 (d) show a manufacturing sequence of a cylindrical alkaline battery according to the present invention. In FIG. 1A, a positive electrode mixture 12 formed in a cylindrical shape is formed on the inner peripheral portion of a battery case 10 which constitutes a positive electrode terminal made of metal and which is opened at the top.
Is charged, and a cylindrical separator 14 having upper and lower openings is loaded on the inner peripheral portion of the positive electrode mixture 12.
【００１１】前記電池ケース１０の底面中央には、プラ
ス端子を構成する凸部１０ａが二段に突出形成され、セ
パレータ１４の装填完了状態では、この凸部１０ａの内
底部側周縁にセパレータ１４の底部開口縁１４ａが位置
する。In the center of the bottom surface of the battery case 10, a convex portion 10a forming a plus terminal is formed in two steps, and when the separator 14 is completely loaded, the separator 14 is formed on the inner peripheral edge of the convex portion 10a. The bottom opening edge 14a is located.
【００１２】この段階で絶縁物質として、図１（ｂ）に
示すように、ホットメルト樹脂１６の固形物をセパレー
タ１４の内周部に投入すると自然落下して、前記凸部１
０ａの内底部に着底集積される。ホットメルト樹脂１６
としては、ポリエステル（ＰＥ）またはポリプロピレン
（ＰＰ）などの絶縁性の高い熱可塑性樹脂のペレットが
用いられ、計量器１８の下部に一体化された投入パイプ
２０を介して適正量投入される。なお、この適正投入量
は、電池のサイズや凸部１０ａの寸法，形状によって定
まるものであるが、ＵＭ１形アルカリ電池においては
０．８±０．２〜０．２５ｇ程度が好適である。At this stage, as the insulating material, as shown in FIG. 1B, when the solid material of the hot melt resin 16 is put into the inner peripheral portion of the separator 14, the solid material is naturally dropped and the convex portion 1 is formed.
It is accumulated on the inner bottom of 0a. Hot melt resin 16
As the pellet, a pellet of a thermoplastic resin having high insulation such as polyester (PE) or polypropylene (PP) is used, and a proper amount of the pellet is injected through a charging pipe 20 integrated in the lower portion of the measuring device 18. It should be noted that this proper amount of charge is determined by the size of the battery and the size and shape of the convex portion 10a, but in the case of the UM1 type alkaline battery, about 0.8 ± 0.2 to 0.25 g is suitable.
【００１３】このホットメルト樹脂１６は、固形のペレ
ットの状態で投入されるため、セパレータ１４の内面に
付着することなく、自然落下により凸部１０ａの内底部
に集積されるが、落下のための補助手段としてバイブレ
ータなどを用いることも可能である。Since the hot melt resin 16 is charged in the form of solid pellets, it does not adhere to the inner surface of the separator 14 and accumulates on the inner bottom portion of the convex portion 10a by natural fall, but It is also possible to use a vibrator or the like as auxiliary means.
【００１４】投入作業完了後、図１（ｃ）に示すよう
に、ヒータ２２を介して電池ケース１０の底部を加熱す
ると、ホットメルト樹脂１６は溶融し、流動してそのセ
ルフレベリング性によって平坦となり、次いで冷却する
ことにより、周縁を前記セパレータ１４の底部開口縁１
４ａに一体化しつつセパレータ１４の底部開口を絶縁状
態に閉塞する。After the charging operation is completed, as shown in FIG. 1C, when the bottom of the battery case 10 is heated via the heater 22, the hot melt resin 16 is melted and flows to become flat due to its self-leveling property. Then, by cooling, the periphery of the bottom opening edge 1 of the separator 14 is
The bottom opening of the separator 14 is closed in an insulating state while being integrated with 4a.
【００１５】この後、図１（ｄ）に示すように、セパレ
ータ１４の内周部に負極活物質２４を充填し、これの中
央に負極集電棒２６を挿通し、さらに電池ケース１０の
上部開口を封口ガスケット２８を介して負極端子板３０
で蓋し、周囲をカシメ付けることで内部密封された筒形
アルカリ素電池が完成することになる。Thereafter, as shown in FIG. 1D, the inner peripheral portion of the separator 14 is filled with the negative electrode active material 24, the negative electrode current collector rod 26 is inserted through the center of the negative electrode active material 24, and the upper opening of the battery case 10 is further opened. Via the sealing gasket 28 to the negative electrode terminal plate 30
By capping with and caulking the surroundings, a sealed cylindrical alkaline battery is completed.
【００１６】なお、従来方法では、セパレータの内面へ
のホットメルト樹脂の付着率は０．００１％であった
が、本発明を採用することにより、０．００％に低下し
た。In the conventional method, the adhesion rate of the hot melt resin to the inner surface of the separator was 0.001%, but it decreased to 0.00% by adopting the present invention.
【００１７】また、底部閉塞不充分を原因とした絶縁不
良率が従来では０．００５％であったが、本発明を採用
した場合には０．０００％となり、本発明によりセパレ
ータの底部閉塞工程における不良発生を完全に防止でき
ることを確認した。Further, the insulation failure rate due to insufficient bottom closing is 0.005% in the past, but when the present invention is adopted, it becomes 0.000%, and the bottom closing step of the separator according to the present invention. It was confirmed that the occurrence of defects in the can be completely prevented.
【００１８】[0018]
【発明の効果】以上実施例によって明らかなように、本
発明に係る筒形アルカリ電池の製造方法にあっては、ホ
ットメルト樹脂は固形状態で投入されるので、注入用ノ
ズルを必要とせず、ノズルの目詰りを原因とするホット
メルト樹脂のセパレータ内面に対する付着がなく、これ
による電池性能低下を防止できる。また、電池ケースの
底部を加熱することによってホットメルト樹脂が溶融流
動し、セルフレベリング化の後に冷却により固化し、セ
パレータの底部開口を閉塞するため、従来の加圧展開方
式やロッドによる展開方式に比べて、閉塞不充分による
絶縁不良あるいはホットメルト樹脂のセパレータへの付
着なども防止できるほか、底部閉塞工程における作業も
簡単である。As is clear from the above examples, in the method for manufacturing a tubular alkaline battery according to the present invention, since the hot melt resin is charged in a solid state, an injection nozzle is not required, Since hot melt resin does not adhere to the inner surface of the separator due to nozzle clogging, it is possible to prevent deterioration of battery performance. Also, by heating the bottom of the battery case, the hot-melt resin melts and flows, and after self-leveling, it solidifies by cooling and closes the bottom opening of the separator. In comparison, it is possible to prevent insulation failure due to insufficient blockage, adhesion of hot melt resin to the separator, and the like, and the work in the bottom block step is simple.
【図１】（ａ）〜（ｄ）は本発明を適用した筒形アルカ
リ電池の製造手順を示す断面図である。1A to 1D are cross-sectional views showing a manufacturing procedure of a tubular alkaline battery to which the present invention is applied.
【図２】（ａ）はホットメルト樹脂の注入時における従
来の不具合を示す断面図、（ｂ）は気体加圧による加圧
展開時の従来の不具合を示す断面図である。FIG. 2A is a cross-sectional view showing a conventional defect at the time of injecting a hot melt resin, and FIG. 2B is a cross-sectional view showing a conventional defect at the time of pressure deployment by gas pressurization.
１０ 電池ケース １２ 正極合剤 １４ 筒状セパレータ １４ａ 底部開口縁（筒状セパレータ１４の） １６ ホットメルト樹脂 ２４ 負極活物質 ２６ 負極集電棒 ２８ 封口ガスケット ３０ 負極端子板 10 Battery Case 12 Positive Electrode Mixture 14 Cylindrical Separator 14a Bottom Opening Edge (of the Cylindrical Separator 14) 16 Hot Melt Resin 24 Negative Electrode Active Material 26 Negative Electrode Current Collector 28 Sealing Gasket 30 Negative Terminal Plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村上 秀二 東京都港区新橋５丁目36番11号 富士電気 化学株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Murakami 5-36-11 Shimbashi, Minato-ku, Tokyo Inside Fuji Electric Chemical Co., Ltd.
Claims (1)
に正極合剤を装填し、該正極合剤の内周部に筒状のセパ
レータを装填し、該セパレータの底部開口を絶縁物質で
閉塞する工程を含む筒形アルカリ電池の製造方法におい
て、 前記絶縁物質はホットメルト樹脂から構成され、 固形状の該ホットメルト樹脂を前記セパレータの底部開
口内部に投入し、 続いて前記電池ケースの底面を加熱することにより前記
ホットメルト樹脂を溶融させ、 次いで冷却することにより前記筒状セパレータの底部開
口縁部に結着させて底部開口を閉塞する、 ことを特徴とする筒形アルカリ電池の製造方法。1. A positive electrode mixture is loaded on the inner peripheral portion of a cylindrical battery case having an upper opening, a cylindrical separator is loaded on the inner peripheral portion of the positive electrode mixture, and the bottom opening of the separator is made of an insulating material. In a method of manufacturing a tubular alkaline battery including a step of closing with a plug, the insulating material is composed of a hot-melt resin, and the hot-melt resin in a solid state is put into a bottom opening of the separator, and then the battery case Heating the bottom surface to melt the hot-melt resin, and then cooling to bind to the bottom opening edge of the tubular separator to close the bottom opening, producing a cylindrical alkaline battery Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3319610A JPH05135777A (en) | 1991-11-08 | 1991-11-08 | Manufacture of cylindrical alkaline battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3319610A JPH05135777A (en) | 1991-11-08 | 1991-11-08 | Manufacture of cylindrical alkaline battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05135777A true JPH05135777A (en) | 1993-06-01 |
Family
ID=18112201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3319610A Pending JPH05135777A (en) | 1991-11-08 | 1991-11-08 | Manufacture of cylindrical alkaline battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05135777A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009123378A (en) * | 2007-11-12 | 2009-06-04 | Fdk Energy Co Ltd | Cylindrical alkaline battery |
| JP2009283207A (en) * | 2008-05-20 | 2009-12-03 | Fdk Energy Co Ltd | Alkaline battery |
-
1991
- 1991-11-08 JP JP3319610A patent/JPH05135777A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009123378A (en) * | 2007-11-12 | 2009-06-04 | Fdk Energy Co Ltd | Cylindrical alkaline battery |
| JP2009283207A (en) * | 2008-05-20 | 2009-12-03 | Fdk Energy Co Ltd | Alkaline battery |
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