JP2582451Y2 - Coin-shaped lithium battery - Google Patents
Coin-shaped lithium batteryInfo
- Publication number
- JP2582451Y2 JP2582451Y2 JP1990062279U JP6227990U JP2582451Y2 JP 2582451 Y2 JP2582451 Y2 JP 2582451Y2 JP 1990062279 U JP1990062279 U JP 1990062279U JP 6227990 U JP6227990 U JP 6227990U JP 2582451 Y2 JP2582451 Y2 JP 2582451Y2
- Authority
- JP
- Japan
- Prior art keywords
- positive electrode
- insulating gasket
- battery
- coin
- support ring
- 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 - Lifetime
Links
Classifications
-
- Y02E60/12—
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、コイン形リチウム電池の構造に関し、とく
に高放電容量化のための電池構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a structure of a coin-type lithium battery, and particularly to a battery structure for increasing a discharge capacity.
本発明は、負極缶と正極缶とは絶縁性ガスケットを介
して封止してなる電池容器を用いるコイン形リチウム電
池において、絶縁性ガスケットが支持リングを介して正
極缶の底から離れた位置で封止する電池構造にすること
によって、電解液の注入量を増すことができて放電容量
が大きく得られる電池であり、また絶縁性ガスケットと
支持リングを一体化することによってその作製を容易化
した電池である。The present invention provides a coin-type lithium battery using a battery container in which a negative electrode can and a positive electrode can are sealed via an insulating gasket, wherein the insulating gasket is separated from a bottom of the positive electrode can via a support ring. A battery structure that can be sealed allows a larger discharge capacity to be obtained by increasing the amount of injected electrolyte, and has been made easier by integrating an insulating gasket and a support ring. Battery.
近年カメラや腕時計の電子機器の高性能化、小型化に
は目覚ましいものがあり、これらの電子機器の電源であ
る電池にも、小型化、高容量化への要求が強まって来て
いる。In recent years, there has been remarkable performance and miniaturization of electronic devices such as cameras and wristwatches, and demands for miniaturization and high capacity of batteries, which are power sources of these electronic devices, have been increasing.
そしてこうした電子機器にはその電源として、コイン
形リチウム電池が、その占有体積が小さいこと、軽量で
あること等の利点により、その電源として広く利用され
るようになってきている。In such electronic devices, a coin-type lithium battery has been widely used as a power source because of its advantages such as small occupied volume and light weight.
従来のコイン形リチウム電池は第６図で示されるよう
な構造になっている。第６図において、61は負極缶、62
は負極リチウム、63はセパレータ、64は正極ペレット、
65は絶縁性ガスケット、66は正極缶、67は正極リングで
ある。そして、この電池は以下に述べるような手順で組
み立てられるのが普通である。負極缶61を下にしてその
中に負極リチウム62を圧着する。その上にセパレータ63
を重ね、さらにその上にリング状の絶縁性ガスケット65
を置き、この上から電解液を滴下する。そしてこの上に
正極リング67に外周を覆われた正極ペレット64を載せ、
さらに再度電解液を補充滴下し、最後に正極缶66をかぶ
せその端をかしめて密封して電池は出来上がる。A conventional coin-shaped lithium battery has a structure as shown in FIG. In FIG. 6, 61 is a negative electrode can, 62
Is negative electrode lithium, 63 is separator, 64 is positive electrode pellet,
65 is an insulating gasket, 66 is a positive electrode can, and 67 is a positive electrode ring. This battery is usually assembled in the following procedure. The negative electrode lithium 61 is pressed into the negative electrode can 61 with the negative electrode can 61 down. Separator 63 on it
And a ring-shaped insulating gasket 65
And the electrolytic solution is dropped from above. Then, the positive electrode pellet 64 whose outer periphery is covered by the positive electrode ring 67 is placed on this,
Further, the electrolyte is replenished and dropped again, and finally, the positive electrode can 66 is covered, and the end is crimped and sealed to complete the battery.
ところが、活物質量を増して放電容量の大きい電池を
得るために、コイン形リチウム電池の高さを大きくする
場合、上記の従来の電池の構造では電池容積に対して、
充分な量の電解液を注入できないという欠点がある。本
考案の課題は電池容積に対して、充分な量の電解液を注
入できて放電容量が大きく得られる作製の容易なコイン
形リチウム電池を提供することである。However, in order to obtain a battery having a large discharge capacity by increasing the amount of the active material, when the height of the coin-shaped lithium battery is increased, in the above-described conventional battery structure, with respect to the battery volume,
There is a disadvantage that a sufficient amount of electrolyte cannot be injected. It is an object of the present invention to provide a coin-type lithium battery which can be easily manufactured and has a large discharge capacity by injecting a sufficient amount of electrolyte into the battery volume.
本発明は、負極缶と正極缶とを絶縁性ガスケットを介
してなる電池容器を用いるコイン形リチウム電池におい
て、絶縁性ガスケットが支持リングを介して正極缶の底
から離れた位置で封止することによって注入できる電解
液を大きくできて、その結果放電容量を大きく得られる
電池である。また本発明は、その電池の組立を容易化す
るために、絶縁性ガスケットと支持リングを一体化した
電池である。ここで、絶縁性ガスケットの材質として
は、ポリプロピレン等のはっ水性樹脂が望ましく、また
支持リングの材質としては、ステンレス鋼のような強度
の高いものが望ましい。絶縁性ガスケットと支持リング
の一体化の方法としては嵌合が望ましい。The present invention provides a coin-type lithium battery using a battery container in which a negative electrode can and a positive electrode can are interposed via an insulating gasket, wherein the insulating gasket is sealed at a position away from the bottom of the positive electrode can via a support ring. This makes it possible to increase the amount of electrolyte that can be injected, thereby increasing the discharge capacity. Further, the present invention is a battery in which an insulating gasket and a support ring are integrated to facilitate assembly of the battery. Here, as a material of the insulating gasket, a water-repellent resin such as polypropylene is desirable, and as a material of the support ring, a material having high strength such as stainless steel is desirable. As a method of integrating the insulating gasket and the support ring, fitting is desirable.
本考案の電池構造にすることによって、同一の電池容
積の従来構造に比べて、電解液を多く注入することがで
き、放電容量の大きい電池が得られる。ここで本考案に
用いられる支持リングは絶縁性ガスケットと正極缶の封
口のための台座の役割をはたす。By using the battery structure of the present invention, a larger amount of electrolyte can be injected and a battery having a larger discharge capacity can be obtained as compared with the conventional structure having the same battery volume. Here, the support ring used in the present invention serves as a pedestal for sealing the insulating gasket and the positive electrode can.
また絶縁性ガスケットと支持リングを一体化すること
によって、負極缶を下にして電解液を注入する従来の電
池組立と同様な手順で容易に電池を作製できる。In addition, by integrating the insulating gasket and the support ring, a battery can be easily manufactured by the same procedure as in a conventional battery assembly in which an electrolyte is injected with the negative electrode can facing down.
〔実施例〕 高さ7.7mm、外径24.5mmのコイン形リチウム電池に適
用した場合について、本考案の実施例及び従来構造の比
較例を第１ないし第５図を参照して説明する。EXAMPLE An example of the present invention and a comparative example of a conventional structure applied to a coin-type lithium battery having a height of 7.7 mm and an outer diameter of 24.5 mm will be described with reference to FIGS.
実施例1. 第１図は本考案の実施例のコイン形リチウム電池の構
造を示す断面図である。第１図において、１はニッケル
メッキしたステンレス鋼よりなる負極缶、２は直径20m
m、厚さ1.7mmの負極リチウムで負極缶１に圧着されてい
る。３はセパレータ、４は正極ペレット、５はポリプロ
ピレン樹脂製の絶縁性ガスケット、６は負極缶と同じ材
質よりなる正極缶、７は正極ペレット４の外周を覆う正
極リング、８はステンレス鋼製の支持リングである。8a
は支持リング８の絶縁性ガスケット５と接する部位に設
けられた曲げ部であり、また、９は絶縁性ガスケット５
と支持リング８と正極リング７と正極缶６の底とで形成
される空間であって、電解液を保持する電解液保持部で
ある。前記支持リング８は第２図で示すように絶縁性ガ
スケット５と嵌合により一体化されている。正極ペレッ
ト４は、正極活物質として350℃で４時間熱処理を施し
た二酸化マンガン89重量部、導電材としてグラファイト
９重量部及び結合材としてポリテトラフルオロエチレン
２重量部より成る正極合剤を直径20mm、高さ5.2mの円板
状にプレスで加圧成形したものである。電池の組立て手
順は次のようにした。Embodiment 1. FIG. 1 is a sectional view showing the structure of a coin-type lithium battery according to an embodiment of the present invention. In FIG. 1, 1 is a negative electrode can made of nickel-plated stainless steel, and 2 is a 20 m diameter.
m, 1.7 mm thick negative electrode lithium is pressed against the negative electrode can 1. 3 is a separator, 4 is a positive electrode pellet, 5 is an insulating gasket made of polypropylene resin, 6 is a positive electrode can made of the same material as the negative electrode can, 7 is a positive electrode ring covering the outer periphery of the positive electrode pellet 4, and 8 is a stainless steel support. It is a ring. 8a
Is a bent portion provided at a portion of the support ring 8 which is in contact with the insulating gasket 5;
And a space formed by the support ring 8, the positive electrode ring 7, and the bottom of the positive electrode can 6, and is an electrolytic solution holding section for holding an electrolytic solution. The support ring 8 is integrated with the insulating gasket 5 by fitting as shown in FIG. The positive electrode pellet 4 was made of a positive electrode mixture composed of 89 parts by weight of manganese dioxide heat-treated at 350 ° C. for 4 hours as a positive electrode active material, 9 parts by weight of graphite as a conductive material, and 2 parts by weight of polytetrafluoroethylene as a binder. , And is press-formed into a disk having a height of 5.2 m by a press. The procedure for assembling the battery was as follows.
先に述べた従来例と同じように、負極缶１を下にし
て、その中に負極リチウム２を入れて圧着し、その上に
セパレータ３を置き、その上に絶縁性ガスケット５と一
体化された支持リング８を組付け更に電解液、正極リン
グ７、正極ペレット４を入れて最後に正極缶６を乗せ、
缶をかしめて密封し電池Ａとした。In the same manner as in the conventional example described above, the negative electrode can 1 is turned down, the negative electrode lithium 2 is put in the negative electrode can 1, and the negative electrode can 2 is pressure-bonded, the separator 3 is placed thereon, and the insulating gasket 5 is integrated therewith. The support ring 8 was assembled, the electrolyte solution, the positive electrode ring 7 and the positive electrode pellet 4 were put therein, and finally the positive electrode can 6 was put thereon.
The can was caulked and sealed to obtain a battery A.
ここで、電解液としては、プロピレンカーボネート
と、１、２−ジメトキシエタンの体積比1:1の混合溶液
中に電解質として過塩素酸リチウムを0.5モル/1の割合
で溶解させた非水電解液を用いた。また上記の実施例で
は、支持リング８と絶縁性ガスケット５とを第２図の模
式的断面図に示すように嵌合一体化したものを用いた
が、第３図に模式的に示すような形で絶縁性ガスケット
35を支持リング38を嵌合したものでもよく、また、第４
図に示すように嵌合ではなく絶縁性ガスケット45と支持
リング48を一体成形で作ったものを用いてもよい。Here, as the electrolyte, a non-aqueous electrolyte obtained by dissolving lithium perchlorate as an electrolyte in a mixed solution of propylene carbonate and 1,2-dimethoxyethane at a volume ratio of 1: 1 at a ratio of 0.5 mol / 1 is used. Was used. In the above embodiment, the support ring 8 and the insulating gasket 5 are fitted and integrated as shown in the schematic sectional view of FIG. 2, but are used as schematically shown in FIG. Insulating gasket in shape
35 may be fitted with a support ring 38.
As shown in the figure, instead of fitting, an insulating gasket 45 and a support ring 48 may be integrally formed.
実施例２ 第５図は本考案の他の実施例のコイン形リチウム電池
の構造を示す断面図である。第５図において、実施例１
と共通な部分には同じ番号を付し、説明は省略する。55
は絶縁性ガスケット、57は支持リングであり、それは先
述の実施例１とは異なりとくに一体化されていない。従
ってこの場合には電池の組立ては、正極缶６を下にして
次のように行う。正極缶６を下にして、その中に支持リ
ング57、正極リング７、正極ペレット４を入れ、実施例
１と同じ電解液を注入し、支持リング57の上に絶縁性ガ
スケット55を置き、その上にセパレータ３を置いて、そ
の上から、負極リチウム２を中に圧着した負極缶１をか
ぶせその端をかしめて密封し電池Ｂとした。Embodiment 2 FIG. 5 is a sectional view showing the structure of a coin-type lithium battery according to another embodiment of the present invention. Referring to FIG.
The same reference numerals are given to the same parts as those described above, and the description is omitted. 55
Is an insulating gasket and 57 is a support ring, which is not particularly integrated unlike the first embodiment. Therefore, in this case, the battery assembly is performed as follows with the positive electrode can 6 turned down. With the positive electrode can 6 facing down, the support ring 57, the positive electrode ring 7, and the positive electrode pellet 4 are put therein, the same electrolytic solution as in Example 1 is injected, and the insulating gasket 55 is placed on the support ring 57. A separator 3 was placed on the top, and a negative electrode can 1 with a negative electrode lithium 2 pressed inside was placed over the separator 3, and the end was crimped and sealed to obtain a battery B.
比較例 先述した従来のコイン形リチウム電池と同じ構造で比
較例の電池を作製した。第７図はこの比較例のコイン形
リチウム電池の構造を示す断面図である。第７図におい
て、71は負極缶、72は負極リチウム、73はセパレータ、
74は正極ペレット、75は絶縁性ガスケット、76は正極
缶、77は正極リングである。負極リチウム72及び正極ペ
レット74は実施例と同様に作られ同じ大きさ、形のもの
を用いた。また、負極缶71、正極缶76、セパレータ73、
絶縁性ガスケット75、正極リング77、はいずれも実施例
と同じ材質のものを用いた。用いた電解液は実施例と同
じである。電池の組立て手順は先述の従来例と同様であ
る。このようにして作製した比較例の電池を電池Ｃとし
た。Comparative Example A battery of a comparative example was manufactured with the same structure as the above-described conventional coin-type lithium battery. FIG. 7 is a sectional view showing the structure of a coin-type lithium battery of this comparative example. In FIG. 7, 71 is a negative electrode can, 72 is a negative electrode lithium, 73 is a separator,
74 is a positive electrode pellet, 75 is an insulating gasket, 76 is a positive electrode can, and 77 is a positive electrode ring. The negative electrode lithium 72 and the positive electrode pellet 74 were formed in the same manner as in the example, and had the same size and shape. Also, a negative electrode can 71, a positive electrode can 76, a separator 73,
Both the insulating gasket 75 and the positive electrode ring 77 were made of the same material as in the example. The electrolyte used was the same as in the examples. The procedure for assembling the battery is the same as in the above-described conventional example. The battery of the comparative example thus produced was referred to as Battery C.
以上のように作製した実施例の電池Ａ、Ｂ及び比較例
の電池Ｃについて、6.8KΩの短絡抵抗で終止電圧2.0Vに
なるまで放電させ放電容量を調べた。The batteries A and B of the examples and the battery C of the comparative example produced as described above were discharged with a short-circuit resistance of 6.8 KΩ until the final voltage reached 2.0 V, and the discharge capacity was examined.
この結果を第１表に示す。 Table 1 shows the results.
第１表に示すように、従来構造の比較例の電池Ｃでは放
電容量は900mAH程度であるのに対して、本考案の実施例
の電池Ａ、Ｂでは1000mAH以上の大きい放電容量が得ら
れた。 As shown in Table 1, the battery C of the comparative example having the conventional structure had a discharge capacity of about 900 mAH, whereas the batteries A and B of the embodiment of the present invention obtained a large discharge capacity of 1000 mAH or more. .
本考案により、容量が大きく生産性に優れたコイン形
リチウムウ電池を提供できるようになり、その工業的価
値は大である。According to the present invention, a coin-type lithium battery having a large capacity and excellent productivity can be provided, and its industrial value is great.
第１図は本考案の実施例のコイン形リチウム電池の構造
を示す断面図、第２図は嵌合して一体化された絶縁性ガ
スケットと支持リングを示した模式的断面図、第３図は
嵌合して一体化された絶縁性ガスケットと支持リングの
他の例の模式的断面図、第４図は一体成形された絶縁性
ガスケットと支持リングの例の模式的断面図、第５図は
本考案の他の実施例のコイン形リチウム電池の構造を示
す断面図、第６図は従来のコイン形リチウム電池の構造
を示す断面図、第７図は比較例のコイン形リチウム電池
の構造を示す断面図、である。 図面において、 １……負極缶 ２……負極リチウム ３……セパレータ ４……正極ペレット ５……絶縁性ガスケット ６……正極缶 ８……支持リングFIG. 1 is a cross-sectional view showing the structure of a coin-type lithium battery according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view showing an insulating gasket and a support ring fitted and integrated, and FIG. Is a schematic cross-sectional view of another example of the insulating gasket and the support ring integrated by fitting, FIG. 4 is a schematic cross-sectional view of an example of the integrally formed insulating gasket and the support ring, FIG. FIG. 6 is a cross-sectional view showing the structure of a coin-type lithium battery according to another embodiment of the present invention, FIG. 6 is a cross-sectional view showing the structure of a conventional coin-type lithium battery, and FIG. FIG. In the drawings, 1 ... a negative electrode can 2 ... a negative electrode lithium 3 ... a separator 4 ... a positive electrode pellet 5 ... an insulating gasket 6 ... a positive electrode can 8 ... a support ring
Claims (2)
収めた正極缶とをセパレータおよび絶縁性ガスケットを
介して封止してなる電池容器を用いるコイン形リチウム
電池において、前記正極材の外周は正極リングで覆わ
れ、しかも前記絶縁性ガスケットが前記正極材側に向か
って曲げ部を有する支持リングを介して前記正極缶の底
から離れて位置することにより、前記絶縁性ガスケット
と前記支持リングと前記正極リングと前記正極缶とで電
解液を保持する電解液保持部を形成することを特徴とす
るコイン形リチウム電池。1. A coin-type lithium battery using a battery container obtained by sealing a negative electrode can to which a negative electrode material is pressed and a positive electrode can containing a positive electrode material via a separator and an insulating gasket. The outer periphery of the insulating gasket is covered with a positive electrode ring, and the insulating gasket is located away from the bottom of the positive electrode can via a support ring having a bent portion toward the positive electrode material side, so that the insulating gasket and the A coin-shaped lithium battery, wherein an electrolyte holding portion for holding an electrolyte is formed by the support ring, the positive electrode ring, and the positive electrode can.
は、予め支持リングの曲げ部において一体として形成さ
れていることを特徴とする、実用新案登録請求の範囲第
１項目記載のコイン形リチウム電池。2. The coin-type lithium battery according to claim 1, wherein the insulating gasket and the support ring are formed integrally at a bent portion of the support ring in advance. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990062279U JP2582451Y2 (en) | 1990-06-14 | 1990-06-14 | Coin-shaped lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990062279U JP2582451Y2 (en) | 1990-06-14 | 1990-06-14 | Coin-shaped lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0421053U JPH0421053U (en) | 1992-02-21 |
| JP2582451Y2 true JP2582451Y2 (en) | 1998-10-08 |
Family
ID=31591280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990062279U Expired - Lifetime JP2582451Y2 (en) | 1990-06-14 | 1990-06-14 | Coin-shaped lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582451Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60115451U (en) * | 1984-01-13 | 1985-08-05 | 松下電器産業株式会社 | Lithium battery |
| JPS6196654A (en) * | 1984-10-18 | 1986-05-15 | Shin Kobe Electric Mach Co Ltd | Sealed battery |
-
1990
- 1990-06-14 JP JP1990062279U patent/JP2582451Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0421053U (en) | 1992-02-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |