JPH0526696Y2 - - Google Patents
Info
- Publication number
- JPH0526696Y2 JPH0526696Y2 JP1986028465U JP2846586U JPH0526696Y2 JP H0526696 Y2 JPH0526696 Y2 JP H0526696Y2 JP 1986028465 U JP1986028465 U JP 1986028465U JP 2846586 U JP2846586 U JP 2846586U JP H0526696 Y2 JPH0526696 Y2 JP H0526696Y2
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- lithium
- plate
- current collector
- metal lithium
- 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
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 63
- 229910052744 lithium Inorganic materials 0.000 claims description 63
- 229910052751 metal Inorganic materials 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 10
- 238000002788 crimping Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- Y02E60/12—
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
この考案は筒形リチウム電池用負極に関し、詳
しくは、ボビン形リチウム電池などに使用され、
金属リチウムに負極集電体を電気的に接続して構
成される、筒形リチウム電池用負極に関するもの
である。[Detailed description of the invention] <Industrial application field> This invention relates to a negative electrode for cylindrical lithium batteries, and more specifically, it is used in bobbin-type lithium batteries, etc.
The present invention relates to a negative electrode for a cylindrical lithium battery, which is configured by electrically connecting a negative electrode current collector to metallic lithium.
〈従来の技術〉
上記のような筒形リチウム電池に使用されてい
るリチウム負極は、例えば特開昭57−128467号公
報に開示されているように、エキスパンデツドメ
タルのような金属ネツトやパンチドメタルなどの
負極に食い込み易い形状に加工成形した細長い集
電体を、シート状をなすリチウム負極の片面ほぼ
中央個所に圧着し、圧着前あるいは圧着後などに
電流取出し用のリード板を集電体に溶接して取付
け、次いで負極を集電体が内面側にくるように円
筒状に形成していた。<Prior art> The lithium negative electrode used in the above-mentioned cylindrical lithium battery is made of metal nets such as expanded metal or punched metal, as disclosed in Japanese Patent Application Laid-open No. 57-128467. A long and thin current collector that has been processed and formed into a shape that easily bites into the negative electrode, such as dometal, is crimped to approximately the center of one side of the sheet-shaped lithium negative electrode, and a lead plate for current extraction is used to collect the current before or after crimping. It was attached to the body by welding, and then the negative electrode was formed into a cylindrical shape with the current collector facing inside.
〈考案が解決しようとする問題点〉
しかし、上記のように負極に負極集電体を圧着
して取付ける形式のものは、負極と集電体との圧
着強度が弱いことから、圧着の信頼性を得るため
に集電体の面積をある程度大きくして圧着面積を
広くとらなければならず、集電体材料がかなり多
く必要になるという問題があつた。また、金属基
体をネツト状や多孔板に加工成形して集電体を作
つたり、この集電体を所定寸法に裁断する等多く
の手間がかかる他、負極集電体を負極に圧着させ
る工程並びに集電体とリード板とを溶接する工程
を必要とし製造工程が繁雑化するという問題もあ
つた。<Problems to be solved by the invention> However, in the above-mentioned method in which the negative electrode current collector is attached to the negative electrode by crimping, the crimping strength between the negative electrode and the current collector is weak, so the reliability of the crimping is poor. In order to obtain this, it is necessary to increase the area of the current collector to a certain extent to ensure a large crimping area, which poses a problem in that a considerable amount of current collector material is required. In addition, it takes a lot of time and effort to process and form the metal substrate into a net shape or perforated plate to make the current collector, cut the current collector to a specified size, and also crimping the negative electrode current collector to the negative electrode. There was also the problem that the manufacturing process was complicated because it required a process and a process of welding the current collector and the lead plate.
〈問題点を解決するための手段〉
以上の問題に鑑みなされたこの考案の筒形リチ
ウム電池用負極は、
筒状に形成される金属リチウム板と、その金属
リチウム板に重ね会わされる挟着用リチウム板
と、細幅帯板状の負極集電体を有し、
上記金属リチウム板は、中空円筒状をなす正極
合剤の中間部に没入させて正極合剤と対向する部
分と、該対向部分の上方に延長して形成した非対
向部分を有し、上記挟着用リチウム板は、上記金
属リチウム板と折り曲げ部を介した一体形成か又
は別体形成とし、
上記負極集電体の下端部は、上記金属リチウム
板の少なくとも非対向部分において上記挟着用リ
チウム板間に挟着される
ようにしたものである。<Means for solving the problems> The negative electrode for cylindrical lithium batteries devised in view of the above problems consists of a metal lithium plate formed in a cylindrical shape, and a clamping member overlapped with the metal lithium plate. It has a lithium plate and a negative electrode current collector in the form of a narrow strip, and the metal lithium plate has a part that is immersed in the middle part of a hollow cylindrical positive electrode mixture and faces the positive electrode mixture, and a part that faces the positive electrode mixture; The clamping lithium plate is formed integrally with the metal lithium plate via a bent part or formed separately from the metal lithium plate, and the lower end of the negative electrode current collector is such that at least the non-opposing portions of the metal lithium plates are sandwiched between the sandwiching lithium plates.
〈作用〉
この電池を放電すると、正極合剤と対向する金
属リチウム板の対向部分で反応が開始し、該対向
部分における消耗が進行する。しかし、該対向部
分の上方に延長して形成した非対向部分は、反応
とは全く無関係で、消耗されないから、仮に不均
一な反応によつて金属リチウム板の対向部分が分
断するような消耗を呈しても、上記非対向部分に
よる集電効果、および消耗がない非対向部分に挟
着によつて取付く負極集電体による集電の信頼性
は確実に保てる。この故、従来のエキスパンデツ
ドメタルやパンチドメタル等は全く無用となる。<Function> When this battery is discharged, a reaction starts at the opposing portion of the metal lithium plate that faces the positive electrode mixture, and consumption progresses in the opposing portion. However, the non-opposing portions formed by extending above the opposing portions are completely unrelated to the reaction and are not consumed. Even if the negative electrode current collector is attached to the non-opposed portion by sandwiching it, the current collection effect by the non-opposed portion and the reliability of current collection by the negative electrode current collector attached to the non-opposite portion without consumption can be reliably maintained. Therefore, conventional expanded metal, punched metal, etc. are completely unnecessary.
〈実施例〉
まず、挟着用リチウム板が、金属リチウム板と
折り曲げ部を介して一体形成されている例から述
べる。第１図Ａには、展開された負極形成用の方
形板状をなす金属リチウムシートが符号１で示さ
れている。この金属リチウムシートは中央から二
つ折りされて重ね合わされるものであつて、左側
を金属リチウム板１ａ、右側を挟着用リチウム板
１ｂと呼ぶと、左側の金属リチウム板１ａの上端
部分にエンボス加工などによつて細幅帯板状の負
極集電体（リード板を兼用）３よりやや広幅の凹
部２が形成されている。本例の金属リチウム板１
ａと挟着用リチウム板１ｂは、共に、後述の中空
円筒状をなす正極合剤５の中間部に没入させて正
極合剤５と対向する金属リチウム板部分と、該対
向部分の上方に延長して形成した非対向部分を有
している。<Example> First, an example will be described in which a lithium plate for clamping is integrally formed with a metal lithium plate via a bent portion. In FIG. 1A, a developed metal lithium sheet in the form of a rectangular plate for forming a negative electrode is indicated by reference numeral 1. This metal lithium sheet is folded in half from the center and stacked on top of each other.The left side is called the metal lithium plate 1a and the right side is called the clamping lithium plate 1b.The upper end of the left metal lithium plate 1a is embossed etc. As a result, a recess 2 is formed which is slightly wider than the narrow band-shaped negative electrode current collector 3 (which also serves as a lead plate). Metal lithium plate 1 of this example
Both the lithium plate a and the clamping lithium plate 1b are immersed in the middle part of the positive electrode mixture 5 having a hollow cylindrical shape, which will be described later, and extend above the metal lithium plate part facing the positive electrode mixture 5 and the opposing part. It has a non-opposed portion formed by
上記した負極集電体３を矢印の方向に動かし
てその一端部分を凹部２内に載置し、右側の挟着
用リチウム板１ｂを矢印の方向に折曲げて金属
リチウム板１ａの上面に重ね合わせて圧着した状
態を第１図Ｂに示す。負極集電体３の一端部分
は、金属リチウム板１ａと挟着用リチウム板１ｂ
とによつて挟着された状態となる。以上のように
して構成されるシート状の負極１を１回巻回して
第１図Ｃのように筒状に形成することで、本考案
の負極ができる。尚、凹部２は金属リチウム板１
ａと負極集電体３の位置決め用のもので、省略す
ることもできる。 Move the negative electrode current collector 3 described above in the direction of the arrow and place one end thereof in the recess 2, and bend the right side clamping lithium plate 1b in the direction of the arrow and overlap it on the top surface of the metal lithium plate 1a. Figure 1B shows the crimped state. One end portion of the negative electrode current collector 3 includes a metal lithium plate 1a and a sandwiching lithium plate 1b.
It is in a state where it is sandwiched between the two. The negative electrode of the present invention can be obtained by winding the sheet-like negative electrode 1 constructed as described above once to form a cylindrical shape as shown in FIG. 1C. Note that the recess 2 is formed by the metal lithium plate 1.
This is for positioning a and the negative electrode current collector 3, and can be omitted.
この負極１を使用してボビン形リチウム電池を
得るには、第１図Ｄに示したように、底面に正極
端子を兼ねる突起４ａを一体に形成した有底円筒
状の正極缶４の内面に圧着して収納された中空円
筒状の正極合剤５の中空部に、袋状セパレータ６
を介して、上記のようにして得た筒状の負極１を
挿入する。この時、図示したように、負極１の上
端部に形成した非対向部分および負極集電体３
の挟着個所は、正極合剤５の上方に露出すること
になる。挿入後は、従来と同様の方法で電解液を
注入し、封口板７、負極端子板８、絶縁ガスケツ
ト９並びに熱収縮性チユーブ１０を組合わせれば
図示したようなボビン形リチウム電池ができる。 In order to obtain a bobbin-type lithium battery using this negative electrode 1, as shown in FIG. A bag-like separator 6 is placed in the hollow part of the hollow cylindrical positive electrode mixture 5 that is crimped and stored.
The cylindrical negative electrode 1 obtained as described above is inserted through the tube. At this time, as shown in the figure, the non-opposing portion formed at the upper end of the negative electrode 1 and the negative electrode current collector 3
The sandwiched portion will be exposed above the positive electrode mixture 5. After insertion, an electrolytic solution is injected in the same manner as before, and the sealing plate 7, negative terminal plate 8, insulating gasket 9, and heat-shrinkable tube 10 are combined to form a bobbin-type lithium battery as shown.
第２図は、負極集電体３を金属リチウムに挟着
させる他例を示したものである。この場合、方形
板状の金属リチウム板１１の表面に負極集電体３
の一端部を載置した後、金属リチウム片からなる
板状の挟着用金属リチウム板１２を負極集電体３
の一端部の上面に載せ、次いで挟着用金属リチウ
ム板１２を図中裏方向に押圧してやれば、挟着用
金属リチウム板１２は金属リチウム板１１に圧着
してその一部となり、この結果、負極集電体３の
一端部は金属リチウム板１１と挟着用金属リチウ
ム板１２に挟着された状態となる。挟着後は上記
と同じく円筒状に形成して電池用負極とする。 FIG. 2 shows another example in which the negative electrode current collector 3 is sandwiched between metal lithium. In this case, the negative electrode current collector 3 is placed on the surface of the rectangular metal lithium plate 11.
After placing one end, the plate-shaped metal lithium plate 12 for clamping made of a metal lithium piece is placed on the negative electrode current collector 3.
If the metal lithium plate 12 for clamping is placed on the upper surface of one end and then pressed in the backward direction in the figure, the metal lithium plate 12 for clamping will be crimped onto the metal lithium plate 11 and become a part of it, and as a result, the negative electrode collection One end of the electric body 3 is sandwiched between the metal lithium plate 11 and the metal lithium plate 12 for clamping. After sandwiching, it is formed into a cylindrical shape in the same manner as above to form a negative electrode for a battery.
尚、この例においても、挟着用金属リチウム板
１２の大きさを図中一点鎖線で示した部分１２ａ
にまで拡大させるか、同部分１２ａに挟着用金属
リチウム板１２を圧着させるかして、上記実施例
と同じく、少なくとも負極上端部の非対向部分
において負極集電体３を金属リチウム板１１と挟
着用金属リチウム板１２間に挟着させる構成とし
てもよい。 In this example as well, the size of the metal lithium plate 12 for clamping is indicated by a portion 12a indicated by a dashed line in the figure.
Similarly to the above embodiment, the negative electrode current collector 3 is sandwiched between the metal lithium plate 11 at least in the non-opposing portion of the upper end of the negative electrode by expanding the metal lithium plate 12 to the same portion 12a or by press-bonding the metal lithium plate 12 to the same portion 12a. It may also be configured to be sandwiched between wearable metal lithium plates 12.
〈考案の効果〉
以上のように構成されるこの考案の筒形リチウ
ム電池用負極は、その上方に、反応とは係わりな
い、従つて消耗しない非対向部分を形成するとい
う極めて簡単な構成で集電作用を発揮させるもの
であるから、従来のエキスパンデツドメタル等の
使用は無用となり、エキスパンデツドメタル等の
使用に伴う問題点を完全に解消する。<Effects of the invention> The negative electrode for cylindrical lithium batteries of this invention constructed as described above has an extremely simple structure in which a non-opposed portion is formed above it that is not involved in the reaction and therefore does not consume. Since it exhibits an electric effect, the use of conventional expanded metal etc. is unnecessary and the problems associated with the use of expanded metal etc. are completely eliminated.
また、負極集電体は消耗しない非対向部分に挟
着によつて取付けたから、金属リチウムの有する
優れた展延性により至極簡単且つ容易に取付ける
ことができ、しかも集電の信頼性を確保すること
ができる。 In addition, since the negative electrode current collector is attached by sandwiching it to the non-opposing part that does not wear out, it can be attached extremely simply and easily due to the excellent malleability of metallic lithium, and the reliability of current collection is ensured. I can do it.
第１図Ａ〜Ｄは本考案の実施例の電極、並びに
これに用いた電池の製造手順を示した説明図、第
２図は他例を示した説明図である。
１……負極、２……負極集電体、４……正極
缶、５……正極合剤、８……負極端子板、１ａ，
１１……金属リチウム板、１ｂ，１２……挟着用
リチウム板、……金属リチウム板の非対向部
分。
FIGS. 1A to 1D are explanatory diagrams showing an electrode according to an embodiment of the present invention and the manufacturing procedure of a battery used therein, and FIG. 2 is an explanatory diagram showing another example. 1... Negative electrode, 2... Negative electrode current collector, 4... Positive electrode can, 5... Positive electrode mixture, 8... Negative electrode terminal plate, 1a,
11...Metal lithium plate, 1b, 12...Lithium plate for clamping,...Non-opposing portion of metal lithium plate.
Claims (1)
と、その金属リチウム板に重ね合わされる挟着用
リチウム板１ｂ，１２と、細幅帯板状の負極集電
体３を有し、 上記金属リチウム板１ａ，１１は、中空円筒状
をなす正極合剤５の中間部に没入させて正極合剤
５と対向する部分と、該対向部分の上方に延長し
て形成した非対向部分を有し、上記挟着用リチ
ウム板１ｂ，１２は、上記金属リチウム板１ａと
折り曲げ部を介した一体形成か又は別体形成と
し、 上記負極集電体３の下端部は、上記金属リチウ
ム板１ａ，１１の少なくとも非対向部分と上記
挟着用リチウム板１ｂ，１２間に挟着される 筒形リチウム電池用負極。[Claims for Utility Model Registration] Metallic lithium plates 1a and 11 formed in a cylindrical shape
, a sandwiching lithium plate 1b, 12 superimposed on the metal lithium plate, and a negative electrode current collector 3 in the form of a narrow band. The sandwiching lithium plates 1b and 12 have a portion that is immersed in the intermediate portion of the agent 5 and faces the positive electrode mixture 5, and a non-opposed portion that is extended above the opposing portion, and the sandwiching lithium plates 1b and 12 are The lower end of the negative electrode current collector 3 is formed between at least the non-opposing portions of the metal lithium plates 1a and 11 and the sandwiching lithium plates 1b and 12, and is formed integrally with the plate 1a via a bent portion or formed separately. A negative electrode for cylindrical lithium batteries that is sandwiched between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986028465U JPH0526696Y2 (en) | 1986-02-28 | 1986-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986028465U JPH0526696Y2 (en) | 1986-02-28 | 1986-02-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62140672U JPS62140672U (en) | 1987-09-04 |
| JPH0526696Y2 true JPH0526696Y2 (en) | 1993-07-06 |
Family
ID=30831452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986028465U Expired - Lifetime JPH0526696Y2 (en) | 1986-02-28 | 1986-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526696Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128467A (en) * | 1981-01-30 | 1982-08-10 | Matsushita Electric Ind Co Ltd | Cylindrical non-aqueous electrolytic solution battery |
-
1986
- 1986-02-28 JP JP1986028465U patent/JPH0526696Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128467A (en) * | 1981-01-30 | 1982-08-10 | Matsushita Electric Ind Co Ltd | Cylindrical non-aqueous electrolytic solution battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62140672U (en) | 1987-09-04 |
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