JP3054891B2 - Lithium battery and method of manufacturing the same - Google Patents
Lithium battery and method of manufacturing the sameInfo
- Publication number
- JP3054891B2 JP3054891B2 JP4010626A JP1062692A JP3054891B2 JP 3054891 B2 JP3054891 B2 JP 3054891B2 JP 4010626 A JP4010626 A JP 4010626A JP 1062692 A JP1062692 A JP 1062692A JP 3054891 B2 JP3054891 B2 JP 3054891B2
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- negative electrode
- piece
- metal
- pressed
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Primary Cells (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、負極集電体を兼ねる負
極缶と負極活物質である金属リチウムの接続状態を改善
したリチウム電池及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium battery having improved connection between a negative electrode can serving also as a negative electrode current collector and lithium metal as a negative electrode active material, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】従来、リチウム電池は内面に凹凸を設け
た負極缶内面もしくは負極缶内面に金属ネットを溶接
し、この金属ネット上に金属リチウムを圧着していた。
これは、リチウム電池の負極集電体を兼ねる負極缶に金
属リチウム片を押圧固着する際に、その固着状態を改善
するため、ステンレス鋼のネットを予め負極缶のリチウ
ム配設部に溶接しておく、あるいは負極缶に凹凸を設け
る等の手段をとっているからである。2. Description of the Related Art Conventionally, in a lithium battery, a metal net was welded to the inner surface of a negative electrode can or an inner surface of a negative electrode can provided with irregularities on the inner surface, and metal lithium was pressed onto the metal net.
This is because when pressing and fixing a metallic lithium piece to a negative electrode can also serving as a negative electrode current collector of a lithium battery, in order to improve the fixing state, a stainless steel net is welded in advance to the lithium disposition portion of the negative electrode can. This is because the negative electrode can is provided with irregularities or the like.
【０００３】[0003]
【発明が解決しようとする課題】従来のリチウム電池は
上述したように内面に凹凸を設けた負極缶を使用した
り、負極缶内面に金属ネットを溶接しているので、凹凸
加工のコストや金属ネットのコスト、溶接に必要な費用
がかかり、電池のコストが高くなる欠点があった。特に
負極缶自体に凹凸を設ける方法では、金属リチウムの缶
への固着が不十分であり、特に厚い層の金属リチウム片
を用いる場合に固着状態が悪くなり問題であった。As described above, a conventional lithium battery uses a negative electrode can having irregularities on its inner surface or a metal net welded to the inner surface of the negative electrode can as described above. There is a disadvantage that the cost of the net and the cost required for welding are increased, and the cost of the battery is increased. In particular, in the method in which the negative electrode can itself is provided with irregularities, the fixation of the metallic lithium to the can is insufficient, and particularly when a thick layer of metallic lithium pieces is used, the adhered state is deteriorated, which is a problem.
【０００４】本発明者は、金属リチウム片を極薄とすれ
ば負極缶への接着性が改善されるとの知見に基づき、極
薄の金属リチウム片を負極缶に押圧することにより、従
来のリチウム電池における金属リチウムの負極缶への固
着強度に劣らない強度が得られることを発見した。そし
て、本発明の目的は、この発見に基づき、缶の内面に極
薄の金属リチウムを介在させることにより従来のリチウ
ム電池の諸特性はそのままに、製造コストの低廉なリチ
ウム電池およびその製造方法を提供することにある。[0004] The present inventor has found that if the metal lithium piece is made extremely thin, the adhesion to the negative electrode can is improved. It has been found that a strength that is not inferior to the strength of fixing lithium metal to a negative electrode can in a lithium battery can be obtained. An object of the present invention is to provide a low-cost lithium battery and a method of manufacturing the same while maintaining various characteristics of the conventional lithium battery by interposing extremely thin metallic lithium on the inner surface of the can based on this discovery. To provide.
【０００５】[0005]
【課題を解決するための手段】上記課題を解決するため
に本発明のリチウム電池は、内面に凹凸を設けていない
負極缶内面に、金属ネットを介在させることなく、第一
層目の金属リチウムを直接圧着により配設し、さらにこ
の第一層目の金属リチウム上に第二層目の金属リチウム
を圧着により配設している。In order to solve the above-mentioned problems, a lithium battery according to the present invention comprises a first layer of lithium metal without a metal net interposed on the inner surface of a negative electrode can having no unevenness on the inner surface. Are disposed by direct compression, and a second layer of metal lithium is disposed on the first layer of metal lithium by compression.
【０００６】また、本発明のリチウム電池の製造方法
は、負極缶に固着する金属リチウム片を２層に分割し、
まず、薄い金属リチウム片を負極缶に押圧固着した上に
もう一方の金属リチウム片を押圧固着することにある。
さらに押圧固着するパンチに凹凸を設ければより強固な
固着強度が得られる。In the method for producing a lithium battery according to the present invention, the metal lithium piece fixed to the negative electrode can is divided into two layers,
First, a thin metal lithium piece is pressed and fixed to a negative electrode can, and another metal lithium piece is pressed and fixed.
Further, by providing irregularities on the punch to be pressed and fixed, a stronger fixing strength can be obtained.
【０００７】[0007]
【作用】薄い金属リチウム片は、負極缶への押圧固着が
比較的容易である。特に厚さが０．６ｍｍ以下の金属リ
チウムは、ステンレス鋼のネット、缶の凹凸等がない平
坦な面への押圧固着が可能であるが、それ以上になると
押圧固着が困難である。金属リチウム片どうしの接合は
容易である。従って本発明によれば、薄い金属リチウム
が負極缶に強固に固着され、残る厚い金属リチウム片も
既に固着されている薄い金属リチウム片に強固に接合す
るため、金属リチウム全体が強固に負極缶に固着され
る。The thin metallic lithium piece can be relatively easily fixed to the negative electrode can by pressing. In particular, metallic lithium having a thickness of 0.6 mm or less can be pressed and fixed to a flat surface of a stainless steel net or a can without irregularities, but if it is larger than that, it is difficult to press and fix. The joining of the metallic lithium pieces is easy. Therefore, according to the present invention, the thin metallic lithium is firmly fixed to the negative electrode can, and the remaining thick metallic lithium piece is also firmly joined to the already fixed thin metallic lithium piece. It is fixed.
【０００８】圧着パンチの押圧部分に凹凸を設けて、前
述の金属リチウム片を押圧すると、一層強固に固着する
ことができる。また、缶に押圧されるリチウム片とその
上に押圧されるリチウム片は、同一の径、または形状で
ある必要はなく、任意の形状を採用することができる。
リチウム片は２片以上多数に分割することも可能であ
る。When the above-mentioned metal lithium piece is pressed by providing irregularities in the pressing portion of the pressure bonding punch, the metal lithium piece can be more firmly fixed. Further, the lithium piece pressed on the can and the lithium piece pressed thereon need not have the same diameter or shape, and may have any shape.
The lithium piece can be divided into two or more pieces.
【０００９】[0009]
【実施例】図１に本発明を用いて製造したコイン形リチ
ウム電池ＣＲ２４７７の部分断面図を示す。図中、予め
ガスケット７と一体となった側壁に絶縁体８を有する負
極缶１の内面に、厚み０．３ｍｍの金属リチウム２を押
圧して圧着する。この負極缶１の内面には、凹凸は施さ
れていないが金属リチウム２は負極缶１と十分圧着され
る。この金属リチウム２の上に、さらに厚み１．３ｍｍ
の金属リチウム３を押圧して圧着する。FIG. 1 is a partial sectional view of a coin-type lithium battery CR2377 manufactured by using the present invention. In the figure, 0.3 mm thick metallic lithium 2 is pressed against the inner surface of the negative electrode can 1 having the insulator 8 on the side wall integrated with the gasket 7 in advance. Although the inner surface of the negative electrode can 1 is not uneven, the metallic lithium 2 is sufficiently pressed against the negative electrode can 1. On top of this metallic lithium 2, a further 1.3 mm thick
Is pressed and pressed.
【００１０】この金属リチウム３の上にセパレータ４、
二酸化マンガンなどを主体とする正極活物質５を載置す
る。このように、負極缶１内に発電要素を収納したの
ち、正極缶６を被せて、ガスケット７を介して負極缶１
と正極缶６を封口する。このようにして製造されたリチ
ウム電池は、内面に凹凸を有する負極缶１の内面に金属
リチウムを圧着した従来電池及び負極缶１の内面に金属
ネットを溶接したのち、この金属ネット上に金属リチウ
ムを圧着した従来電池に比べて電池の内部抵抗、放電容
量等の特性でも遜色がなかった。A separator 4 is provided on the metallic lithium 3.
The positive electrode active material 5 mainly composed of manganese dioxide or the like is placed. After the power generating element is housed in the negative electrode can 1 as described above, the positive electrode can 6 is put on the negative electrode can 1 via the gasket 7.
And the positive electrode can 6 is sealed. The lithium battery manufactured in this manner includes a conventional battery in which metal lithium is pressure-bonded to the inner surface of a negative electrode can 1 having irregularities on the inner surface, and a metal net welded to the inner surface of the negative electrode can 1. The characteristics of the battery, such as internal resistance and discharge capacity, were not inferior to those of the conventional battery in which was pressed.
【００１１】また、このリチウム電池は負極缶１の内面
に凹凸を設けていないので負極缶１のコストを安くする
ことができる。さらに、負極缶１の内面に金属ネットを
溶接していないので、金属ネットの費用を削除できる上
に、溶接に係わる費用も削除できる。よって、本発明の
リチウム電池は電池の特性を維持しながら電池のコスト
を安くすることができる。Further, since the lithium battery has no irregularities on the inner surface of the negative electrode can 1, the cost of the negative electrode can 1 can be reduced. Furthermore, since the metal net is not welded to the inner surface of the negative electrode can 1, the cost of the metal net can be reduced and the cost related to welding can be reduced. Therefore, the lithium battery of the present invention can reduce the cost of the battery while maintaining the characteristics of the battery.
【００１２】従来の方法により厚さ１．６ｍｍの金属リ
チウム片を用いて製造したＣＲ２４７７は、ステンレス
鋼のネットを使用しない場合、約３０％の固着不良が発
生した。本発明品は不良は全く発生しなかった。ステン
レス鋼のネットを予め負極缶にスポット溶接してある面
に金属リチウムを押圧したものは固着上の不良は発生し
なかったが製造コストが大幅に増加した。CR2377 produced by a conventional method using a 1.6-mm-thick lithium metal piece had about 30% poor adhesion when no stainless steel net was used. No defect occurred in the product of the present invention. In the case where the metal lithium was pressed on the surface of the stainless steel net which had been spot-welded to the negative electrode can in advance, no defective adhesion occurred, but the production cost increased significantly.
【００１３】[0013]
【発明の効果】本発明のリチウム電池は負極缶内面に厚
みの薄い金属リチウムを圧着したのち、この薄い金属リ
チウムの上に厚みの厚い金属リチウムを圧着する構成と
したので、電池の特性を変えることなく、電池のコスト
を安くできる効果を有する。本発明のリチウム電池の製
造方法は、負極缶内面に厚みの薄い金属リチウムを圧着
したのちこの薄い金属リチウムの上に厚みの厚い金属リ
チウムを圧着する製造方法としたので、以下に記載する
効果を有する。 負極缶内面に凹凸を設ける必要がないので、負極缶
コストを安くできる。 負極缶内面に金属ネットを溶接する必要がないの
で、電池の製造工程を削減できる。 負極缶内面に圧着が困難な程厚い金属リチウムでも
容易に負極内面に配設ができる。The lithium battery of the present invention has a structure in which a thin metallic lithium is press-bonded to the inner surface of the negative electrode can, and then a thick metallic lithium is press-bonded on the thin metallic lithium. This has the effect that the cost of the battery can be reduced. The method for manufacturing a lithium battery of the present invention is a method for manufacturing a battery in which a thin metal lithium is pressed on the inner surface of a negative electrode can and then a thick metal lithium is pressed on the thin metal lithium. Have. Since there is no need to provide irregularities on the inner surface of the negative electrode can, the cost of the negative electrode can can be reduced. Since there is no need to weld a metal net to the inner surface of the negative electrode can, the battery manufacturing process can be reduced. Even if the metal lithium is so thick that it is difficult to apply pressure to the inner surface of the negative electrode can, it can be easily disposed on the inner surface of the negative electrode.
【図１】本発明の実施例を示す部分断面図である。FIG. 1 is a partial sectional view showing an embodiment of the present invention.
１ 負極缶 ２ 金属リチウム ３ 金属リチウム ４ セパレータ ５ 正極活物質 ６ 正極缶 ７ ガスケット ８ 絶縁体 DESCRIPTION OF SYMBOLS 1 Negative electrode can 2 Metal lithium 3 Metal lithium 4 Separator 5 Positive electrode active material 6 Positive electrode can 7 Gasket 8 Insulator
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−140373（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 6/16 H01M 4/12 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-140373 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01M 6/16 H01M 4/12
Claims (5)
介して所定の厚さの金属リチウム片が押圧固着されてい
ることを特徴とするリチウム電池。 1. An extremely thin piece of metallic lithium is placed on the inner surface of a negative electrode can.
A metal lithium piece of a predetermined thickness is pressed and fixed
A lithium battery.
ウム電池の製造方法において、該負極缶に金属リチウム
の薄い片を押圧して固着せしめた後、別の金属リチウム
片をその薄いリチウム片に押圧固着する工程を具備した
ことを特徴とするリチウム電池の製造方法。2. A method for manufacturing a lithium battery having a negative electrode can also serving as a negative electrode current collector, wherein a thin piece of metallic lithium is pressed and fixed to the negative electrode can, and then another metallic lithium piece is replaced with the thin lithium piece. A method for producing a lithium battery, comprising a step of pressing and fixing to a lithium battery.
片が０．６ｍｍ以下の厚さであることを特徴とする請求
項２記載のリチウム電池の製造方法。3. The method for producing a lithium battery according to claim 2, wherein the thin metal lithium piece pressed against the negative electrode can has a thickness of 0.6 mm or less.
片の負極缶に対する押圧が圧着面に凹凸を有する模様を
設けた圧着パンチを用いて行われることを特徴とする請
求項２記載のリチウムイオン電池の製造方法。4. The lithium metal according to claim 2, wherein the pressing of the thin metallic lithium piece pressed against the negative electrode can against the negative electrode can is performed using a pressure bonding punch provided with a pattern having irregularities on the pressure bonding surface. A method for manufacturing an ion battery.
れる金属リチウム片の押圧が、圧着面に凹凸を設けた圧
着パンチを用いて行われることを特徴とする請求項２記
載のリチウム電池の製造方法。5. The lithium battery according to claim 2, wherein the pressing of the metal lithium piece pressed and fixed on the thin metal lithium piece is performed by using a pressure bonding punch having unevenness on a pressure bonding surface. Manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4010626A JP3054891B2 (en) | 1992-01-24 | 1992-01-24 | Lithium battery and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4010626A JP3054891B2 (en) | 1992-01-24 | 1992-01-24 | Lithium battery and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05205752A JPH05205752A (en) | 1993-08-13 |
| JP3054891B2 true JP3054891B2 (en) | 2000-06-19 |
Family
ID=11755431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4010626A Expired - Lifetime JP3054891B2 (en) | 1992-01-24 | 1992-01-24 | Lithium battery and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054891B2 (en) |
-
1992
- 1992-01-24 JP JP4010626A patent/JP3054891B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05205752A (en) | 1993-08-13 |
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