JPH0474828B2 - - Google Patents
Info
- Publication number
- JPH0474828B2 JPH0474828B2 JP7171784A JP7171784A JPH0474828B2 JP H0474828 B2 JPH0474828 B2 JP H0474828B2 JP 7171784 A JP7171784 A JP 7171784A JP 7171784 A JP7171784 A JP 7171784A JP H0474828 B2 JPH0474828 B2 JP H0474828B2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- separator
- reinforcing ring
- active material
- 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
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 16
- 239000007774 positive electrode material Substances 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 239000007773 negative electrode material Substances 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 239000006182 cathode active material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- H01M6/12—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with flat electrodes
Description
【発明の詳細な説明】
この発明は、非水電解液電池やアルカリ電池な
どに多くみられる偏平型密閉式電池に関し、特
に、その内部構造の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat sealed battery often found in nonaqueous electrolyte batteries, alkaline batteries, etc., and particularly relates to improvements in its internal structure.
ボタン型あるいはコイン型とよばれる偏平型密
閉式電池の従来の代表的な構造を第１図に示して
いる。これは、偏平な正極缶１内に正極活物質
２・セパレータ３・負極活物質４を積層した発電
要素を収納し、かつ、正極缶１の開口部内側に合
成樹脂製の環状の封口ガスケツト６を介して皿状
の負極端子板５を嵌合するとともに、正極缶１の
開口端縁を内側へカール成形することによつて電
池内を密閉したものである。 FIG. 1 shows a typical conventional structure of a flat sealed battery called a button type or coin type battery. This is a flat positive electrode can 1 that houses a power generation element in which a positive electrode active material 2, a separator 3, and a negative electrode active material 4 are laminated, and a synthetic resin annular sealing gasket 6 inside the opening of the positive electrode can 1. A dish-shaped negative electrode terminal plate 5 is fitted through the battery, and the opening edge of the positive electrode can 1 is curled inward to seal the inside of the battery.
正極活物質２は予め円盤状に加圧成形される
が、そのとき同時に、その周縁部に補強リング７
が装着される。補強リング７はステンレスなどか
らなり、断面Ｌ字状に形成されていて、正極活物
質２の周面から上面にかけてこれに密接してい
る。この補強リング７は、正極缶１の開口端縁を
内側へカール成形して密閉する際に、その封口力
を補強リング７で均一に受けて、正極活物質２が
封口力によつて崩れるのを防止するのを主目的に
設けられたものである。また、セパレータ３は例
えばポリプロピレンの不織布などからなり、これ
に電解液が含浸されている。 The positive electrode active material 2 is press-molded in advance into a disk shape, and at the same time, a reinforcing ring 7 is attached to the peripheral edge of the positive electrode active material 2.
is installed. The reinforcing ring 7 is made of stainless steel or the like, has an L-shaped cross section, and is in close contact with the positive electrode active material 2 from its circumferential surface to its upper surface. This reinforcing ring 7 uniformly receives the sealing force when the opening edge of the positive electrode can 1 is curled inward and sealed, thereby preventing the positive electrode active material 2 from collapsing due to the sealing force. The main purpose was to prevent this. Further, the separator 3 is made of, for example, a nonwoven fabric of polypropylene, and is impregnated with an electrolytic solution.
第１図に示すように、補強リング７を伴つた正
極活物質２の外径およびセパレータ３の外径は正
極缶１の内径にほぼ等しく、正極缶１内にはほと
んど間隙なく発電要素が充填されている。そのた
めに、従来、次のような問題を生じていた。 As shown in FIG. 1, the outer diameter of the positive electrode active material 2 with the reinforcing ring 7 and the outer diameter of the separator 3 are approximately equal to the inner diameter of the positive electrode can 1, and the power generating elements are filled in the positive electrode can 1 with almost no gaps. has been done. Conventionally, this has caused the following problems.
上述のように正極缶１のカール成形で電池を密
閉する工程において、電池内部にほとんど空間的
余裕がないので、電池内は全体的に強く圧縮され
る。そのときセパレータ３も圧縮される。特に、
補強リング７の上面部と封口ガスケツト６の底面
部の間に挟まれたセパレータ３の周辺部分が強く
圧縮される。するとセパレータ３に含浸されてい
る電解液が絞り出され、場合によつては封口ガス
ケツト６の外周と正極缶１の間を通つて外部へ漏
れだすことがあつた。このように従来は、電池の
密閉工程で電解液が漏出するという不良が２〜３
％程度と比較的多く発生していた。 As described above, in the step of sealing the battery by curling the positive electrode can 1, there is almost no space inside the battery, so the interior of the battery is strongly compressed as a whole. At that time, the separator 3 is also compressed. especially,
The peripheral portion of the separator 3 sandwiched between the top surface of the reinforcing ring 7 and the bottom surface of the sealing gasket 6 is strongly compressed. As a result, the electrolytic solution impregnated in the separator 3 was squeezed out, and in some cases leaked out through the space between the outer periphery of the sealing gasket 6 and the positive electrode can 1. In this way, in the past, there were 2 to 3 defects in which the electrolyte leaked during the battery sealing process.
It occurred relatively frequently at around %.
この発明は前述した従来の問題点に鑑みなされ
たものであり、その目的は、簡単な改良手段で、
電池の密閉工程における電解液の漏出を確実に防
止できるようにした偏平型密閉式電池を提供する
ことにある。 This invention was made in view of the above-mentioned conventional problems, and its purpose is to provide a simple improvement means,
An object of the present invention is to provide a flat sealed battery that can reliably prevent leakage of electrolyte during the battery sealing process.
上記の目的を達成するために、この発明は、上
述した基本構造の偏平型密閉式電池において、補
強リングの上面部にその内周側部分の高さを外周
側部分より一段低くした窪み部を形成するととも
に、セパレータの外径を上記窪み部の外径より若
干小さくし、セパレータの周縁を上記窪み部上に
配置したことを特徴とする。 In order to achieve the above object, the present invention provides a flat sealed battery having the above-mentioned basic structure, in which a recessed portion is formed on the upper surface of the reinforcing ring, the height of the inner circumferential side being one step lower than the outer circumferential side. At the same time, the outer diameter of the separator is made slightly smaller than the outer diameter of the recess, and the periphery of the separator is disposed on the recess.
以下、この発明の実施例を図面に基づいて詳細
に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
この発明の偏平型密閉式電池の一実施例として
のボタン型非水電解液電池の構造を第２図に示し
ている。これの基本構造は従来と同じで、偏平な
正極缶１内に正極活物質２・セパレータ３・負極
活物質４を積層した発電要素を収納し、かつ、正
極缶１の開口部内側に封口ガスケツト６を介して
負極端子板５を嵌合するとともに、正極缶１の開
口端縁を内側へカール成形することによつて電池
内を密閉したものである。また、負極活物質４と
してはリチウム等の軽金属が使用されている。セ
パレータ３はポリプロピレンの不織布からなり、
これに非水電解液が含浸されている。正極活物質
２は二酸化マンガン等を主体とする合剤を予め円
盤状に加圧成形したもので、その加圧成形時に、
本発明の要部の一つである補強リング７が周縁部
に装着されている。 FIG. 2 shows the structure of a button-type non-aqueous electrolyte battery as an embodiment of the flat sealed battery of the present invention. The basic structure of this is the same as the conventional one, in which a power generation element consisting of a stacked cathode active material 2, separator 3, and anode active material 4 is housed in a flat cathode can 1, and a sealing gasket is installed inside the opening of the cathode can 1. The inside of the battery is hermetically sealed by fitting the negative electrode terminal plate 5 through the positive electrode can 6 and curling the open edge of the positive electrode can 1 inward. Further, as the negative electrode active material 4, a light metal such as lithium is used. The separator 3 is made of polypropylene nonwoven fabric,
This is impregnated with a non-aqueous electrolyte. The positive electrode active material 2 is a mixture mainly composed of manganese dioxide, etc., which has been pressure-molded into a disc shape.
A reinforcing ring 7, which is one of the essential parts of the present invention, is attached to the peripheral edge.
第３図は第２図における補強リング７の詳細を
示している。この補強リング７はステンレス等か
らなり、正極活物質２の周面および上面に密接す
る周面部７１および上面部７２を有し、断面ほぼ
Ｌ字型に形成されている。ただし上面部７２は平
坦ではない。補強リング７の上面部７２には、そ
の内周側部分の高さを外周側部分より一段低くし
た窪み部７３を形成している。この窪み部７３の
段差は、圧縮した状態のセパレータ３の厚みとほ
ぼ等しい。 FIG. 3 shows details of the reinforcing ring 7 in FIG. 2. The reinforcing ring 7 is made of stainless steel or the like, has a circumferential surface portion 71 and a top surface portion 72 that are in close contact with the circumferential surface and the top surface of the positive electrode active material 2, and is formed into a substantially L-shaped cross section. However, the upper surface portion 72 is not flat. The upper surface portion 72 of the reinforcing ring 7 is formed with a recessed portion 73 whose inner peripheral portion is one step lower in height than the outer peripheral portion. The height difference of the recessed portion 73 is approximately equal to the thickness of the separator 3 in a compressed state.
第２図に示すように、補強リング７を伴つて加
圧成形された正極活物質２の上面は、上記窪み部
７３の上面と面一になつている。また、補強リン
グ７を伴う正極活物質２の外径は正極缶１の内径
とほぼ等しく、正極缶内にほぼ間隙なく装填され
ている。 As shown in FIG. 2, the upper surface of the positive electrode active material 2 press-molded together with the reinforcing ring 7 is flush with the upper surface of the recess 73. Further, the outer diameter of the positive electrode active material 2 with the reinforcing ring 7 is approximately equal to the inner diameter of the positive electrode can 1, and is loaded into the positive electrode can with almost no gaps.
またこの発明の電池では、セパレータ３の外径
は正極缶１の内径より相当小さい。詳述すると、
セパレータ３の外径は、第３図に示す補強リング
７の窪み部７３の内径ｂより大きく、窪み部７３
の外径ａより若干小さくなつている。そして第２
図に示すように、セパレータ３は正極活物質２の
上面に重ねられ、その周縁部分が補強リング７の
窪み部７上に配置され、窪み部７３の段差部分よ
り内側に収まつている。 Further, in the battery of the present invention, the outer diameter of the separator 3 is considerably smaller than the inner diameter of the positive electrode can 1. In detail,
The outer diameter of the separator 3 is larger than the inner diameter b of the recess 73 of the reinforcing ring 7 shown in FIG.
It is slightly smaller than the outer diameter a. and the second
As shown in the figure, the separator 3 is stacked on the upper surface of the positive electrode active material 2, and its peripheral portion is placed on the recess 7 of the reinforcing ring 7, and is located inside the stepped portion of the recess 73.
以上の構成において、電池の密閉後の状態で
は、セパレータ３の上面は補強リング７の上面部
７２の上面とほぼ面一になつている。特にここで
注目すべきことは、セパレータ３の周縁が窪み部
７３に収まり、正極缶１の内面近くまで達してい
ないことと、正極缶１の内面近くでは補強リング
７の上面部７２と封口ガスケツト６の底面が直接
接し、この間にセパレータ３の周縁部が挟まれて
はいないことである。 In the above configuration, the upper surface of the separator 3 is substantially flush with the upper surface of the upper surface portion 72 of the reinforcing ring 7 in the state after the battery is sealed. Particularly noteworthy here is that the periphery of the separator 3 fits into the recess 73 and does not reach close to the inner surface of the positive electrode can 1, and that near the inner surface of the positive electrode can 1, the upper surface 72 of the reinforcing ring 7 and the sealing gasket The bottom surfaces of the separators 6 and 6 are in direct contact with each other, and the peripheral edge of the separator 3 is not sandwiched between them.
そのために、正極缶１の開口端縁をカール成形
する電池の密閉工程において、セパレータ３が圧
縮されてそれに含浸されている電解液が絞り出さ
れても、補強リング７の上面部７２と封口ガスケ
ツト６の底面部との密接部分が障害となつて、絞
り出された電解液は正極缶１の内面にまで伝わら
ない。したがつて、正極缶１と封口ガスケツト６
の間を通つて電解液が漏れ出るといつた不良はほ
とんど発生しなくなる。 For this reason, even if the separator 3 is compressed and the electrolyte impregnated in it is squeezed out during the battery sealing process in which the opening edge of the positive electrode can 1 is curled, the upper surface 72 of the reinforcing ring 7 and the sealing gasket remain intact. The squeezed out electrolyte does not reach the inner surface of the positive electrode can 1 because the close contact with the bottom surface of the positive electrode can 1 becomes an obstacle. Therefore, the positive electrode can 1 and the sealing gasket 6
Failures such as those caused by electrolyte leaking through the gaps will almost never occur.
第４図は補強リング７の他の構成例を示してい
る。この例では、補強リング７の上面部７２の厚
みを薄くすることで、上述の窪み部７３を形成し
ている。この例でも上記と同様な作用効果が得ら
れるのは勿論である。 FIG. 4 shows another example of the structure of the reinforcing ring 7. In this example, the above-mentioned recessed portion 73 is formed by reducing the thickness of the upper surface portion 72 of the reinforcing ring 7. Of course, this example also provides the same effects as described above.
以上詳細に説明したように、この発明に係る偏
平型密閉式電池によれば、電池の密閉工程で電解
液が外部に漏れ出すという不良をほとんどなくす
ことができ、製品の歩留りが向上する。 As described in detail above, according to the flat sealed battery according to the present invention, defects such as leakage of electrolyte to the outside during the battery sealing process can be almost eliminated, and the yield of products is improved.
第１図は従来の偏平型密閉式電池の断面図、第
２図はこの発明の一実施例による偏平型密閉式電
池の断面図、第３図は第２図の電池における補強
リングの部分詳細図、第４図はこの発明の他の実
施例を示す補強リングの部分詳細図である。
１……正極缶１、２……正極活物質２、３……
セパレータ３、４……負極活物質４、５……負極
端子板５、６……封口ガスケツト、７……補強リ
ング、７１……周囲面部、７２……上面部、７３
……窪み部。
Fig. 1 is a sectional view of a conventional flat sealed battery, Fig. 2 is a sectional view of a flat sealed battery according to an embodiment of the present invention, and Fig. 3 is a partial detail of the reinforcing ring in the battery of Fig. 2. 4 are partial detailed views of a reinforcing ring showing another embodiment of the present invention. 1... Positive electrode can 1, 2... Positive electrode active material 2, 3...
Separators 3, 4...Negative electrode active material 4, 5...Negative electrode terminal plate 5, 6...Sealing gasket, 7...Reinforcement ring, 71...Surrounding surface portion, 72...Top surface portion, 73
...Indentation.
Claims (1)
形された正極活物質を偏平な正極缶内に収納する
とともに、その上にセパレータおよび負極活物質
を積層し、かつ、上記正極缶の開口部内側に封口
ガスケツトを介して負極端子板を嵌合するととも
に、上記正極缶の開口端縁を内側へカール成形し
て電池内を密閉してなる偏平型密閉式電池におい
て、上記補強リングの上面部にその内周側部分の
高さを外周側部分より一段低くした窪み部を形成
するとともに、上記セパレータの外径を上記窪み
部の外径より若干小さくし、上記セパレータの周
縁を上記窪み部上に配置したことを特徴とする偏
平型密閉式電池。1 A positive electrode active material formed into a disk shape with a reinforcing ring attached to the peripheral edge is housed in a flat positive electrode can, a separator and a negative electrode active material are laminated thereon, and the opening of the positive electrode can is In a flat sealed battery, in which a negative terminal plate is fitted inside via a sealing gasket, and the opening edge of the positive electrode can is curled inward to seal the interior of the battery, the upper surface of the reinforcing ring is A recessed portion is formed in which the height of the inner peripheral side portion is one step lower than the outer peripheral side portion, and the outer diameter of the separator is made slightly smaller than the outer diameter of the recessed portion, and the peripheral edge of the separator is formed so as to be lower than the outer peripheral portion. A flat sealed battery characterized by being arranged in a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7171784A JPS60216446A (en) | 1984-04-12 | 1984-04-12 | Flat enclosed type battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7171784A JPS60216446A (en) | 1984-04-12 | 1984-04-12 | Flat enclosed type battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60216446A JPS60216446A (en) | 1985-10-29 |
| JPH0474828B2 true JPH0474828B2 (en) | 1992-11-27 |
Family
ID=13468553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7171784A Granted JPS60216446A (en) | 1984-04-12 | 1984-04-12 | Flat enclosed type battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60216446A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03245180A (en) * | 1990-02-23 | 1991-10-31 | Toshiba Corp | Brightness controller for panel display |
-
1984
- 1984-04-12 JP JP7171784A patent/JPS60216446A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60216446A (en) | 1985-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |