JP2664412B2 - Method for manufacturing spiral electrode body - Google Patents
Method for manufacturing spiral electrode bodyInfo
- Publication number
- JP2664412B2 JP2664412B2 JP63115441A JP11544188A JP2664412B2 JP 2664412 B2 JP2664412 B2 JP 2664412B2 JP 63115441 A JP63115441 A JP 63115441A JP 11544188 A JP11544188 A JP 11544188A JP 2664412 B2 JP2664412 B2 JP 2664412B2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- current collecting
- collecting tab
- electrode
- electrode body
- 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 - Fee Related
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
- H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 （イ） 産業上の利用分野 本発明はリチウムあるいはリチウム合金等の軟性金属
よりなる帯状負極と、二酸化マンガンやフッ化炭素等を
活物質とする帯状正極との間にセパレータを介在させ、
これら生、負極及びセパレータを渦巻状に巻回して電極
体を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a method in which a belt-shaped negative electrode made of a soft metal such as lithium or a lithium alloy and a band-shaped positive electrode made of manganese dioxide, carbon fluoride or the like as an active material. With a separator in between,
The present invention relates to a method of manufacturing an electrode body by spirally winding the raw material, the negative electrode and the separator.
（ロ） 従来の技術 リチウムを活物質とする帯状負極を備えたこの種の電
池では、負極の集電タブとして実開昭61−166471号公報
に見られるような平板状の金属薄板が用いられる。この
集電タブはその一端が負極活物質であるリチウム板に電
気的に接続され、他端が負極端子を兼ねる電池外装罐あ
るいは封口蓋にスポット溶接等により電気的に接続され
る。(B) Conventional technology In this type of battery provided with a strip-shaped negative electrode using lithium as an active material, a flat metal thin plate as disclosed in Japanese Utility Model Laid-Open No. 166471/1986 is used as a current collecting tab of the negative electrode. . One end of the current collecting tab is electrically connected to a lithium plate as a negative electrode active material, and the other end is electrically connected to a battery outer can or a sealing lid also serving as a negative electrode terminal by spot welding or the like.
ところで、前記負極集電タブは一般に帯状のリチウム
板に圧着等により取り付けられるため、負極の一方の面
側に位置することになる。また、軟性金属からなる負極
を用いているが故に、負極の幅を正極の幅より広く設定
すると、正極端部が負極に容易にくい込みシヨートを起
こし易くなるため、負極の幅は正極の幅より狭く設定さ
れている。したがつて、正、負極及び負極集電タブの位
置関係は、第５図に示す模式図のようになる。By the way, since the negative electrode current collecting tab is generally attached to a belt-like lithium plate by pressure bonding or the like, it is located on one side of the negative electrode. In addition, since the negative electrode made of a soft metal is used, if the width of the negative electrode is set to be wider than the width of the positive electrode, the positive electrode end portion is likely to easily enter the negative electrode and cause a short, so the width of the negative electrode is larger than the width of the positive electrode. It is set narrow. Therefore, the positional relationship between the positive, negative, and negative electrode current collection tabs is as shown in the schematic diagram of FIG.
即ち、負極１の端部が正極３の端部より内側に納ま
り、渦巻電極体の端部には負極１が存在しない領域Ａが
生じる。ここに於いて、集電タブ４として平板状の金属
薄板を用いていると、正極３及び負極１が存在する領域
Ｂでは、これら正、負両電極３、１が集電タブ４を圧迫
するので、集電タブ４は電極の渦巻きに沿つて変形し易
い。ところが領域Ａでは前記圧迫がないので平板状のま
まとなる。特に、集電タブ４は外装罐や封口板に溶接等
によつて接続する際に折り曲げられたり、湾曲したりす
るので、その影響もあつて領域Ａの部分では平板状が維
持される。That is, the end of the negative electrode 1 is located inside the end of the positive electrode 3, and a region A where the negative electrode 1 does not exist is generated at the end of the spiral electrode body. Here, if a flat metal thin plate is used as the current collecting tab 4, in the region B where the positive electrode 3 and the negative electrode 1 exist, both the positive and negative electrodes 3 and 1 press the current collecting tab 4. Therefore, the current collecting tab 4 is easily deformed along the spiral of the electrode. However, in the area A, since the above-mentioned compression is not performed, the area A remains flat. In particular, the current collecting tab 4 is bent or bent when it is connected to the outer can or the sealing plate by welding or the like, so that the flat portion is maintained in the region A due to the influence.
第６図及び第７図は、前記電極体の領域Ａ及び領域Ｂ
に於ける横断面を夫々示す図面である。領域Ｂの部分を
示す第７図に比べて、領域Ａの部分を示す第６図では、
負極１の集電タブ４の端部９が正極３に接近している。
通常、このような渦巻電極体を備える電池では絶縁体と
してセパレータ２を、正極３と負極１との間に介在させ
て巻回しているが、前記集電タブ４の端部９でセパレー
タ２が圧迫を受けて破れ、集電タブ４が正極３と接触し
てシヨートを起こすことがある。このため、集電タブ４
の端部を覆いかくすように保護テープを貼り付けている
が、この保護テープの貼り付け位置がずれると、集電タ
ブ４の端部９が露出してしまうため、まだ充分に満足で
きるとは言えなかつた。6 and 7 show the area A and the area B of the electrode body.
1 is a drawing showing a cross-section of FIG. In FIG. 6 showing the portion of the region A, as compared with FIG. 7 showing the portion of the region B,
The end 9 of the current collecting tab 4 of the negative electrode 1 is close to the positive electrode 3.
Usually, in a battery having such a spiral electrode body, the separator 2 is wound as an insulator between the positive electrode 3 and the negative electrode 1, but the separator 2 is formed at the end 9 of the current collecting tab 4. The collector tab 4 may be broken by the pressure, causing the collector tab 4 to come into contact with the positive electrode 3 to cause a short. Therefore, the current collecting tab 4
The protective tape is stuck so as to cover the end of the current collecting tab. However, if the sticking position of the protective tape is shifted, the end 9 of the current collecting tab 4 is exposed, so that it is still not satisfactory enough. I couldn't say it.
（ハ） 発明が解決しようとする課題 本発明は、負極の集電タブが正極と接触してシヨート
を起こすことを防止しようとするものである。(C) Problems to be Solved by the Invention The present invention is intended to prevent the current collecting tab of the negative electrode from contacting the positive electrode and causing a short-circuit.
（ニ） 課題を解決するための手段 本発明は負極の集電タブを予め渦巻状電極体の渦巻に
沿うよう湾曲させ、この集電タブを軟性金属からなる帯
状負極の一方の面側に取り付け、この帯状負極と帯状正
極との間にセパレータを介在させて巻回して渦巻状電極
体を製造するものである。(D) Means for Solving the Problems In the present invention, the current collecting tab of the negative electrode is previously curved so as to follow the spiral of the spiral electrode body, and the current collecting tab is attached to one surface side of the strip-shaped negative electrode made of a soft metal. Then, a spiral electrode body is manufactured by winding with a separator interposed between the strip-shaped negative electrode and the strip-shaped positive electrode.
（ホ） 作用 負極の集電タブを予め渦巻状電極体の渦巻に沿うよう
に湾曲させて用いると、第５図の領域Ａの部分に於いて
も集電タブは湾曲した状態を維持し、集電タブがセパレ
ータを圧迫して破ることを防止できる。また、集電タブ
を外装罐や封口板に溶接などにより接続する際に折り曲
げたり、湾曲させたりしても、集電タブは予め湾曲して
いるので前記領域Ａに於いて平板状にはなり難く湾曲し
た状態を維持する。(E) Function If the current collecting tab of the negative electrode is used by being curved in advance so as to follow the spiral of the spiral electrode body, the current collecting tab maintains the curved state even in the region A in FIG. It is possible to prevent the current collecting tab from pressing and breaking the separator. Also, even if the current collecting tab is bent or bent when connecting the current collecting tab to the outer can or the sealing plate by welding or the like, the current collecting tab is curved in advance, so that the current collecting tab becomes flat in the area A. Maintain a difficult and curved state.
（ヘ） 実施例 第１図乃至第４図は本発明にかかり、第１図は負極集
電タブと帯状リチウム負極を示す図面、第２図は渦巻状
電極体を備えた電池の縦断面図、第３図及び第４図は第
５図からなる模式図の領域Ａ及び領域Ｂに相当する部分
の横断面を夫々示す図面である。尚、これらの図に於い
て第５図乃至第７図と同一構成部材には同一の符号を付
した。(F) Example FIGS. 1 to 4 relate to the present invention, FIG. 1 is a drawing showing a negative electrode current collecting tab and a strip-shaped lithium negative electrode, and FIG. 2 is a longitudinal sectional view of a battery provided with a spiral electrode body. , FIGS. 3 and 4 are cross-sectional views respectively showing portions corresponding to regions A and B in the schematic diagram shown in FIG. In these figures, the same components as those in FIGS. 5 to 7 are denoted by the same reference numerals.
これらの図面に於いて、１はリチウムからなる帯状負
極、２はポリプロピレン製の微孔性フイルムセパレー
タ、３はステンレス製のラス芯体に二酸化マンガンを主
体とする合剤スラリーを塗着、乾燥して作製した帯状正
極を示している。また、４は、負極集電タブであり、厚
み0.1mmのニッケル平板を予め曲率半径5.0mmになるよう
湾曲させている。渦巻状電極体を作製するに際しては、
まず、第１図に示すようにして予め湾曲させた前記負極
集電タブ４を負極１に圧着し、次いでこの負極１と正極
３との間にセパレータ２が介在するように、これら正、
負極、及びセパレータ２を渦巻状に巻回する。こうして
作製した渦巻状電極体は正極端子を兼用する外装罐５に
装入され、正極集電タブ６を外装罐５に、また負極集電
タブ４を負極端子兼用の封口蓋７に夫々スポット溶接し
た後、外装罐５の開口部をかしめつけることにより、絶
縁パッキング８を介して封口蓋７を前記開口部に固定し
電池が完成する。In these drawings, 1 is a strip-shaped negative electrode made of lithium, 2 is a microporous film separator made of polypropylene, 3 is a stainless steel lath core coated with a mixture slurry mainly composed of manganese dioxide, and dried. 2 shows a band-shaped positive electrode manufactured by the method described above. Reference numeral 4 denotes a negative electrode current collecting tab, which is formed by previously bending a nickel flat plate having a thickness of 0.1 mm to have a radius of curvature of 5.0 mm. When manufacturing a spiral electrode body,
First, the negative electrode current collecting tab 4 previously curved as shown in FIG. 1 is pressure-bonded to the negative electrode 1, and then these positive and negative electrode collecting tabs 4 are inserted so that the separator 2 is interposed between the negative electrode 1 and the positive electrode 3.
The negative electrode and the separator 2 are spirally wound. The spirally wound electrode body thus manufactured is placed in an outer can 5 also serving as a positive electrode terminal, and the positive current collecting tab 6 is spot-welded to the outer can 5 and the negative current collecting tab 4 is spot-welded to a sealing lid 7 also serving as a negative electrode terminal. After that, the opening of the outer can 5 is swaged to fix the sealing lid 7 to the opening via the insulating packing 8 to complete the battery.
上記電池は渦巻状電極体を構成する正極３の幅が、負
極１の幅より大きく、第５図に示したように電極体には
負極が存在しない領域Ａと正、負極が何れも存在する領
域Ｂが生じる。この領域Ａに相当する部分の横断面図が
第３図であり、また、領域Ｂに相当する部分の横断面図
が第４図である。領域Ａについては、第３図に示すよう
に負極集電タブ４は湾曲した状態を維持しており、予め
湾曲させない負極集電タブを用いた従来の電池に比べ負
極集電タブ４がセパレータ２を圧迫し難くなり、負極集
電タブ４の端部と正極３との接近が防止できる。In the above battery, the width of the positive electrode 3 constituting the spiral electrode body is larger than the width of the negative electrode 1, and as shown in FIG. 5, the electrode body has a region A where no negative electrode is present, and both positive and negative electrodes are present. A region B occurs. FIG. 3 is a cross-sectional view of a portion corresponding to the region A, and FIG. 4 is a cross-sectional view of a portion corresponding to the region B. In the area A, as shown in FIG. 3, the negative electrode current collecting tab 4 is maintained in a curved state, and the negative electrode current collecting tab 4 is separated from the separator 2 in comparison with a conventional battery using an uncurved negative electrode current collecting tab. And the approach between the end of the negative electrode current collecting tab 4 and the positive electrode 3 can be prevented.
（ト） 発明の効果 本発明は渦巻状電極体を作製するに際し、帯状負極の
一方の面側に取り付ける負極集電タブを予め電極体の渦
巻に沿うよう湾曲させたものであり、負極集電タブの端
部が正極と接近することが防止でき、負極集電タブの端
部がセパレータを破つて正極と接することを防止でき
る。(G) Effects of the Invention In the present invention, in producing a spiral electrode body, a negative electrode current collecting tab attached to one surface side of a strip-shaped negative electrode is previously curved so as to follow the spiral of the electrode body. The end of the tab can be prevented from approaching the positive electrode, and the end of the negative electrode current collecting tab can be prevented from breaking the separator and coming into contact with the positive electrode.
第１図乃至第４図は本発明にかかり、第１図は負極集電
タブと負極を示す図面、第２図は渦巻状電極体を備えた
電池の縦断面図、第３図及び第４図は渦巻状電極体の要
部横断面図であり、第５図は正、負極と負極集電タブの
位置関係を示す模式図、第６図及び第７図は従来の渦巻
状電極体の要部横断面図である。 １……帯状負極、３……帯状正極、２……セパレータ、
４……負極集電タブ。1 to 4 relate to the present invention, FIG. 1 is a drawing showing a negative electrode current collecting tab and a negative electrode, FIG. 2 is a longitudinal sectional view of a battery provided with a spiral electrode body, and FIGS. FIG. 5 is a cross-sectional view of a main part of the spiral electrode body. FIG. 5 is a schematic view showing a positional relationship between a positive electrode, a negative electrode, and a negative electrode current collecting tab, and FIGS. It is a principal part cross-sectional view. 1 ... strip-shaped negative electrode, 3 ... strip-shaped positive electrode, 2 ... separator,
4 ... Negative electrode current collecting tab.
Claims (1)
の間にセパレータを介在させ、これら正、負極及びセパ
レータを巻回して渦巻状電極体を製造する方法におい
て、前記電極体の渦巻に沿うよう湾曲させた集電タブを
前記巻回の前に前記帯状負極の一方の面側に取り付ける
ことを特徴とする渦巻状電極体の製造方法。1. A method of manufacturing a spiral electrode body by interposing a separator between a belt-like load made of a soft metal and a belt-like positive electrode, and winding the positive electrode, the negative electrode and the separator to produce a spiral electrode body. A method for manufacturing a spiral electrode body, comprising: attaching a current collecting tab curved to the one side of the strip-shaped negative electrode before the winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115441A JP2664412B2 (en) | 1988-05-12 | 1988-05-12 | Method for manufacturing spiral electrode body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115441A JP2664412B2 (en) | 1988-05-12 | 1988-05-12 | Method for manufacturing spiral electrode body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01286258A JPH01286258A (en) | 1989-11-17 |
| JP2664412B2 true JP2664412B2 (en) | 1997-10-15 |
Family
ID=14662636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63115441A Expired - Fee Related JP2664412B2 (en) | 1988-05-12 | 1988-05-12 | Method for manufacturing spiral electrode body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2664412B2 (en) |
-
1988
- 1988-05-12 JP JP63115441A patent/JP2664412B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01286258A (en) | 1989-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |