JPH0696774A - Manufacture of coin type lithium battery - Google Patents
Manufacture of coin type lithium batteryInfo
- Publication number
- JPH0696774A JPH0696774A JP24644592A JP24644592A JPH0696774A JP H0696774 A JPH0696774 A JP H0696774A JP 24644592 A JP24644592 A JP 24644592A JP 24644592 A JP24644592 A JP 24644592A JP H0696774 A JPH0696774 A JP H0696774A
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- ring
- battery
- pellet
- mixture pellet
- 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
-
- Y02E60/12—
Landscapes
- Primary Cells (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコイン形リチウム電池の
製造方法に関する。FIELD OF THE INVENTION The present invention relates to a method for manufacturing a coin type lithium battery.
【０００２】[0002]
【従来の技術】コイン形リチウム電池には、放電によっ
て正極合剤ペレットが径方向に膨脹するのを抑制するた
め、断面Ｌ字形をなす金属製リングを正極合剤ペレット
の角部に嵌着させ、リングによって上記の膨脹を押さえ
るようにしたものがある。このリング付正極合剤ペレッ
トは、従来、リング内底面を正極合剤ペレット表面に密
着するように嵌着させたものが使用されていた。かかる
リング付正極合剤ペレットを用いてコイン形リチウム電
池を得るには、図２（イ）の如く、封口ガスケット２を
周縁部に嵌着させた負極端子１に負極リチウム３を圧着
し、（ロ）の如く、その負極リチウム３上にセパレータ
４を載置してから電解液を注液後、（ハ）の如く、該セ
パレータ４の上に上記リング５付の正極合剤ペレット６
を載置し、その上から再び電解液を注液したのち、
（ニ）の如く、正極缶７を被せ、所定時間放置後、正極
缶７を押圧して電池の出来上がり寸法に合うようにな
し、（ホ）の如く、正極缶７の端部をカールして密閉し
ていた。2. Description of the Related Art In a coin type lithium battery, a metal ring having an L-shaped cross section is fitted to a corner of the positive electrode material mixture pellet in order to prevent the positive electrode material mixture pellet from expanding radially due to discharge. There is a ring that suppresses the expansion. As the positive electrode mixture pellet with a ring, conventionally, one in which the inner bottom surface of the ring is fitted to the surface of the positive electrode mixture pellet has been used. To obtain a coin-type lithium battery using such a positive electrode mixture pellet with a ring, as shown in FIG. 2 (a), the negative electrode lithium 3 is pressure-bonded to the negative electrode terminal 1 having the sealing gasket 2 fitted on the peripheral edge thereof. (B) After placing the separator 4 on the negative electrode lithium 3 and then injecting the electrolytic solution, as shown in (c), the positive electrode mixture pellet 6 with the ring 5 on the separator 4
After placing, and injecting the electrolyte again from above,
As shown in (d), the positive electrode can 7 is covered, and after standing for a predetermined time, the positive electrode can 7 is pressed so as to match the finished size of the battery, and the end of the positive electrode can 7 is curled as shown in (e). It was sealed.
【０００３】[0003]
【発明が解決しようとする課題】上記のようにリング５
内底面を正極合剤ペレット６に密着させてたリング付正
極合剤では、正極合剤ペレット６の表面の一部はリング
５で覆われるため、上記した（ニ）の工程で正極合剤ペ
レット６への電解液吸収時間を長引かせる原因となっ
た。また、リング５が正極合剤ペレット６に密着するリ
ング付正極合剤では、高さ方向の寸法が一定不変である
ため、上記（ニ）の工程で負極端子１と正極缶７とを上
下方向から押圧して電池の出来上がり寸法に合うように
した場合に、実際には内容物の寸法のバラツキや排気の
バラツキ等があるため、正極缶７とリング５との正しい
当接がなされない儘（ホ）の工程に移って電池とされる
ことがあった。このような不安定な状態の儘で電池とな
ったものは、特に高負荷性能にバラツキを生じさせた。As described above, the ring 5 is used.
In the positive electrode mixture with a ring in which the inner bottom surface is brought into close contact with the positive electrode mixture pellet 6, a part of the surface of the positive electrode mixture pellet 6 is covered with the ring 5, so the positive electrode mixture pellet in the above step (d) It was a cause of prolonging the electrolytic solution absorption time for No. 6. Further, in the case of the positive electrode mixture with a ring in which the ring 5 adheres to the positive electrode mixture pellets 6, the dimension in the height direction is constant, and therefore the negative electrode terminal 1 and the positive electrode can 7 are vertically moved in the step (d). When pressed to fit the finished size of the battery, the positive electrode can 7 and the ring 5 are not properly abutted against each other due to variations in the dimensions of the contents and variations in the exhaust gas. It was sometimes transferred to the process of (e) and used as a battery. A battery that has become a battery in such an unstable state causes variations in particularly high load performance.
【０００４】本発明は上記した欠点を解決することを目
的としている。The present invention aims to overcome the above-mentioned drawbacks.
【０００５】[0005]
【課題を解決するための手段】本発明は、封口ガスケッ
トを周縁部に嵌着した負極端子に負極リチウムを圧着さ
せ、その負極リチウム上に載置したセパレータ上から電
解液を注液する第１の工程と、該セパレータの上にリン
グ付正極合剤ペレットを載置し、その上から再び電解液
を注液する第２工程と、該リングの上に正極缶を被せ、
その正極缶を所定圧力で押圧してから該正極缶の端部を
カールして封口する第３の工程からなるコイン形リチウ
ム電池の製造方法において、上記リング付正極合剤ペレ
ットは正極合剤ペレットにリングを僅か係合係止させた
ものとなし、正極缶による押圧でリングを正極合剤ペレ
ットに圧入の間にリング外面と正極缶内面を正しく当接
させ、電池の出来上がり寸法に押圧した状態におけるリ
ングと正極合剤ペレットの間隔を、内容物寸法、排気等
のバラツキにより適宜可変とした。According to the first aspect of the present invention, negative electrode lithium is pressure-bonded to a negative electrode terminal in which a sealing gasket is fitted in a peripheral portion, and an electrolytic solution is injected from a separator placed on the negative electrode lithium. The step of placing the positive electrode mixture pellets with a ring on the separator, and the second step of injecting the electrolyte solution again from above, and covering the ring with a positive electrode can,
In the method for producing a coin-type lithium battery, which comprises the third step of pressing the positive electrode can with a predetermined pressure and then curling and sealing the end of the positive electrode can, the positive electrode mixture pellet with a ring is a positive electrode mixture pellet. It is assumed that the ring is slightly engaged and locked to the positive electrode can, and the ring is pressed into the positive electrode mixture pellet by pressing the ring to the positive electrode mixture pellet so that the outer surface of the ring and the inner surface of the positive electrode can are properly brought into contact with each other and pressed to the finished size of the battery The space between the ring and the positive electrode material mixture pellets in FIG.
【０００６】[0006]
【作 用】正極合剤ペレットにリングを僅か係合係止さ
せたリング付正極合剤ペレットでは、２次注液時、吸収
面である正極合剤ペレット表面はリングによって覆われ
ずに開放されているから、短時間で正極合剤ペレットへ
注入電解液を吸収させる。また、正極缶による押圧力が
リングに加わる当初の段階で正極缶とリングとが片当り
状態であっても、正極缶による押圧中に、リング外面が
正極缶内面に全面当接するようリングが正極合剤ペレッ
トに食い込んでいって、リングの傾き修正を自動的に達
成し、リング外面と正極缶内面を正しく当接させる。一
方、最終的に電池の出来上がり寸法に合うようにした場
合に、内容物の寸法のバラツキや排気のバラツキ等は、
リング内表面と正極合剤ペレット表面との間隔の広狭と
いう結果によって吸収解消する。[Operation] With a positive electrode mixture pellet with a ring in which a ring is slightly engaged and locked to the positive electrode mixture pellet, the surface of the positive electrode mixture pellet, which is the absorbing surface, is opened without being covered by the ring during secondary liquid injection. Therefore, the injected electrolyte is absorbed into the positive electrode material mixture pellets in a short time. Even if the positive electrode can and the ring are in a one-sided contact state at the initial stage when the pressing force from the positive electrode can is applied to the ring, the ring is positively contacted so that the outer surface of the ring entirely contacts the inner surface of the positive electrode can during pressing by the positive electrode can. By digging into the mixture pellets, the inclination of the ring is automatically corrected, and the outer surface of the ring and the inner surface of the positive electrode can are brought into proper contact with each other. On the other hand, when the final size of the battery is adjusted to match the final size of the battery, variations in the dimensions of the contents, variations in exhaust, etc.
Absorption is eliminated by the result that the distance between the inner surface of the ring and the surface of the positive electrode material mixture pellet is wide.
【０００７】[0007]
【実施例】以下、本発明を図１の（イ）〜（ホ）に従っ
て説明する。使用した符号は図２の場合と同じである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. The symbols used are the same as in FIG.
【０００８】（イ）と（ロ）の、封口ガスケット２を周
縁部に嵌着した負極端子１に負極リチウム３を圧着さ
せ、その負極リチウム３上に載置したセパレータ４上か
ら電解液を注液する第１の工程は、図２の（イ）と
（ロ）と変わらない。[0008] In (a) and (b), the negative electrode lithium 3 is pressure-bonded to the negative electrode terminal 1 in which the sealing gasket 2 is fitted in the peripheral portion, and the electrolytic solution is poured from the separator 4 placed on the negative electrode lithium 3. The first step of liquefying is the same as (a) and (b) of FIG.
【０００９】しかし（ハ）の、セパレータ４の上にリン
グ５付の正極合剤ペレット６を載置し、その上から再び
電解液を注液する第２工程では、リング５は正極合剤６
に極く僅かだけ嵌着させたリング付正極合剤を用いてい
る点で相違している。電解液の吸収面である正極合剤ペ
レット６の上面はリング５によって覆い隠されることが
ないから、正極合剤ペレット６への注入電解液の吸収は
迅速になされる。However, in (c) the second step of placing the positive electrode mixture pellets 6 with the ring 5 on the separator 4 and injecting the electrolytic solution again from above, the ring 5 is formed into the positive electrode mixture 6
The difference lies in that a positive electrode mixture with a ring that is only slightly fitted is used. Since the upper surface of the positive electrode material mixture pellet 6, which is the absorption surface of the electrolytic solution, is not covered with the ring 5, the injected electrolytic solution in the positive electrode material mixture pellet 6 can be absorbed quickly.
【００１０】つぎに（ニ）の、リング５の上に正極缶７
を被せて所定圧力で電池の出来上がり寸法になる迄押圧
したのち、（ホ）の、正極缶７端部をカールして封口す
る第３の工程では、従来とはその様相を異にする。すな
わち、正極缶７による押圧を受けてリング５が漸次正極
合剤ペレット６に圧入される間に、始めは正極缶７とリ
ング５とが片当りしていても、正極缶７内面にリング５
外面が全面当接するようにリング５が正極合剤ペレット
６に食い込んで行き、リング５の傾き修正が自動的にな
される。また、最終的に電池の出来上がり寸法に合うよ
うに押圧した場合に、内容物の寸法のバラツキや排気の
バラツキ等は、リング５内表面と正極合剤ペレット６表
面の間隔の広狭という結果によって吸収解消される。こ
の場合、リング５内底面が正極合剤ペレット６表面に密
着せず、極く僅かの隙間があっても、格別の支障はな
い。Next, in (d), the positive electrode can 7 is placed on the ring 5.
In the third step of (e) curling and sealing the end of the positive electrode can 7 after covering with a predetermined pressure to the finished size of the battery, the aspect is different from the conventional one. That is, while the ring 5 is gradually pressed into the positive electrode material mixture pellet 6 by being pressed by the positive electrode can 7, even if the positive electrode can 7 and the ring 5 are initially one-sided, the ring 5 is attached to the inner surface of the positive electrode can 7.
The ring 5 bites into the positive electrode material mixture pellet 6 so that the entire outer surface of the ring 5 abuts, and the inclination of the ring 5 is automatically corrected. Further, in the case where the battery is finally pressed to fit the finished size of the battery, the variation in the size of the contents and the variation in the exhaust are absorbed by the result that the distance between the inner surface of the ring 5 and the surface of the positive electrode material mixture pellet 6 is wide. Will be resolved. In this case, the inner bottom surface of the ring 5 does not come into close contact with the surface of the positive electrode material mixture pellet 6 and even if there is a very small gap, there is no particular problem.
【００１１】[0011]
【発明の効果】以上、説明したように、本発明の方法に
よれば、 ２次注液時、リングは正極合剤ペレットの吸収面を覆
い隠さないから、正極合剤ペレットへの電解液吸収時間
は従来に比べて短縮され、作業能率の向上に寄与するこ
とができる。As described above, according to the method of the present invention, the ring does not cover the absorption surface of the positive electrode material mixture pellet during the secondary injection, so that the positive electrode material mixture pellet absorbs the electrolytic solution. The time is shortened as compared with the conventional one, which can contribute to the improvement of work efficiency.
【００１２】当初は正極缶とリングとが片当り状態に
あっても、正極缶に押されてリングが正極合剤ペレット
に圧入されていく間に、正しく全面接触が達成される自
動修正機能を具備する。Even if the positive electrode can and the ring are initially in one-side contact with each other, an automatic correction function is achieved in which the entire surface is correctly contacted while being pressed by the positive electrode can and being pressed into the positive electrode material mixture pellets. To have.
【００１３】電池の出来上がり寸法とした状態でのリ
ングと正極合剤ペレットの間隔は、内容物寸法、排気等
のバラツキによって適宜可変とすることができるため、
リングと正極缶との正しい接触を確保したうえで電池の
正しい出来上がり寸法とすることができる。The interval between the ring and the positive electrode material mixture pellets in the completed size of the battery can be appropriately changed depending on the size of the contents, variations in exhaust gas, etc.
The correct finished size of the battery can be obtained while ensuring correct contact between the ring and the positive electrode can.
【００１４】といった効果を奏する。The following effects are achieved.
【図１】図１の（イ）から（ホ）は本発明になるコイン
形リチウム電池の製造方法を工程順に示した説明図であ
る。1A to 1E are explanatory views showing a method of manufacturing a coin-type lithium battery according to the present invention in the order of steps.
【図２】図２の（イ）から（ホ）は従来法になるコイン
形リチウム電池の製造方法を工程順に示した説明図であ
る。2A to 2E are explanatory views showing a method of manufacturing a conventional coin-type lithium battery in the order of steps.
１ 負極端子 ２ 封口ガスケット ３ 負極リチウム ４ セパレータ ５ リング ６ 正極合剤ペレット ７ 正極缶、 1 negative electrode terminal 2 sealing gasket 3 negative electrode lithium 4 separator 5 ring 6 positive electrode mixture pellet 7 positive electrode can,
Claims (1)
端子に負極リチウムを圧着させ、その負極リチウム上に
載置したセパレータ上から電解液を注液する第１の工程
と、該セパレータの上にリング付正極合剤ペレットを載
置し、その上から再び電解液を注液する第２工程と、該
リングの上に正極缶を被せ、その正極缶を所定圧力で押
圧してから該正極缶の端部をカールして封口する第３の
工程からなるコイン形リチウム電池の製造方法におい
て、上記リング付正極合剤ペレットは正極合剤ペレット
にリングを僅か係合係止させたものとなし、正極缶によ
る押圧でリングを正極合剤ペレットに圧入の間にリング
外面と正極缶内面を正しく当接させ、電池の出来上がり
寸法に押圧した状態におけるリングと正極合剤ペレット
の間隔を、内容物寸法、排気等のバラツキにより適宜可
変としたことを特徴とするコイン形リチウム電池の製造
方法。1. A first step of crimping a negative electrode lithium onto a negative electrode terminal fitted with a sealing gasket on a peripheral portion thereof, and injecting an electrolytic solution from a separator placed on the negative electrode lithium, and a step of above the separator. The second step of placing the positive electrode material mixture pellets with a ring on it, and injecting the electrolytic solution again from above, and covering the ring with a positive electrode can, pressing the positive electrode can with a predetermined pressure, and then applying the positive electrode In the method for manufacturing a coin-type lithium battery including the third step of curling and sealing the end of the can, the positive electrode mixture pellet with a ring is obtained by slightly engaging and locking the ring with the positive electrode mixture pellet. While pressing the ring into the positive electrode mixture pellet by pressing with the positive electrode can, the outer surface of the ring and the inner surface of the positive electrode can are properly brought into contact with each other, and the interval between the ring and the positive electrode mixture pellet in the state of being pressed to the finished size of the battery is determined by Size A method for manufacturing a coin-type lithium battery, wherein the coin-type lithium battery is variable according to variations in exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24644592A JP2596291B2 (en) | 1992-09-16 | 1992-09-16 | Method of manufacturing coin-shaped lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24644592A JP2596291B2 (en) | 1992-09-16 | 1992-09-16 | Method of manufacturing coin-shaped lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0696774A true JPH0696774A (en) | 1994-04-08 |
| JP2596291B2 JP2596291B2 (en) | 1997-04-02 |
Family
ID=17148558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24644592A Expired - Fee Related JP2596291B2 (en) | 1992-09-16 | 1992-09-16 | Method of manufacturing coin-shaped lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2596291B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11664556B2 (en) | 2018-07-06 | 2023-05-30 | Lg Energy Solution, Ltd. | Secondary battery comprising a deformed gasket and method for manufacturing the same |
-
1992
- 1992-09-16 JP JP24644592A patent/JP2596291B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11664556B2 (en) | 2018-07-06 | 2023-05-30 | Lg Energy Solution, Ltd. | Secondary battery comprising a deformed gasket and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2596291B2 (en) | 1997-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |