JPS59169058A - Production method of flat lithium cell with lead terminals - Google Patents

Production method of flat lithium cell with lead terminals

Info

Publication number
JPS59169058A
JPS59169058A JP58043883A JP4388383A JPS59169058A JP S59169058 A JPS59169058 A JP S59169058A JP 58043883 A JP58043883 A JP 58043883A JP 4388383 A JP4388383 A JP 4388383A JP S59169058 A JPS59169058 A JP S59169058A
Authority
JP
Japan
Prior art keywords
terminal
negative electrode
lead
positive electrode
spot
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.)
Pending
Application number
JP58043883A
Other languages
Japanese (ja)
Inventor
Yoshizo Kori
郡　喜三
Yoshiaki Izumi
佳明 泉
Kenichi Yokoyama
賢一 横山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Hitachi Maxell Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP58043883A priority Critical patent/JPS59169058A/en
Publication of JPS59169058A publication Critical patent/JPS59169058A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

PURPOSE:To prevent an internal short circuit and increase the welding strength of terminals by spot-welding a spare terminal made of a metal plate with a thickness of 0.01-0.2mm. to the outer surface side of a negative electrode terminal plate filled with a lithium negative electrode and welding a lead terminal of the negative electrode side to the spare terminal. CONSTITUTION:A positive electrode 4 is stored in a positive electrode can 6 and is faced to a negative electrode 8 through a separator 7. The negative electrode 8 is constituted by inserting disk-like metal lithium and pressing it into contact with a negative electrode terminal plate 3. An electrolyte is filled inside the positive electrode can 6 and terminal plate 3 and they are sealed by an annular gasket 10. Then, a spare terminal 1 made of a nickel disk with a thickness of 0.01-0.2mm. is spot-welded to the outer surface side of the terminal plate 3. Next, the tip of a lead terminal 2 made of a nickel wire is machined in a flat shape, then it is spot-welded to the spare terminal 1. Furthermore, a lead terminal 12 is directly spot-welded to the outer surface of the positive electrode welded to the outer surface of the positive electrode can 6. Accordingly, an internal short circuit of a cell can be prevented and the welding strength of lead wires can be increased.

Description

【発明の詳細な説明】 本発明はリード端子付き扁平形リチウム電池の製造法の
改良に係り、負極側のリード端子の溶接に先立って、負
極端子板にリード端子溶接用の予備端子をスポット溶接
するこ七により、電池性能の低下を招くことなく、強度
の大きいリード端子の強固な取り付けを可能ならしめる
ことを目的とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the manufacturing method of a flat lithium battery with a lead terminal, and includes spot welding a spare terminal for welding the lead terminal to the negative terminal plate prior to welding the lead terminal on the negative electrode side. The purpose of the present invention is to make it possible to securely attach lead terminals with high strength without causing deterioration in battery performance.

リチウム電池は貯蔵特性がすぐれていることから、最近
、電気機器のバックアップ用電源として使用されること
が多くなってきた。このような用途においては、本来、
機器の耐用期間中、電池の取り替えは行なわれないので
、電池の機器への組込みは機器の回路基板に電池をはん
だ付けなどで固定することによって行なわれる。そのた
め、はんだ付けなどがしやすいように、リード端子をあ
らかじめ電池に取り付けておく必要がある。Because lithium batteries have excellent storage characteristics, they have recently been increasingly used as backup power sources for electrical equipment. In such applications, originally,
Since the battery is not replaced during the life of the device, the battery is integrated into the device by fixing the battery to the device's circuit board by soldering or the like. Therefore, it is necessary to attach lead terminals to the battery in advance to facilitate soldering.

ところで、従来、このリード端子の取り付けは、電池端
子としての負極端子板や正極缶にリード端子を直接スポ
ット溶接することによって行なわれていたが、負極に使
用されているリチウムは約１８６℃で溶融するため、負
極端子板に大きな熱量がかかるとリチウムが溶融し厚さ
が薄い扁平形電池では溶融したリチウムがセパレータを
通過し内部短絡を引きおこすので、負極端子板に大きな
エネルギーを与えることができず、その結果、負極側の
溶接強度がどうしても低くなりがちである。By the way, conventionally, this lead terminal was attached by directly spot welding the lead terminal to the negative terminal plate or positive electrode can as a battery terminal, but the lithium used in the negative electrode melts at about 186 degrees Celsius. Therefore, if a large amount of heat is applied to the negative terminal plate, the lithium will melt, and in thin flat batteries, the molten lithium will pass through the separator and cause an internal short circuit, making it impossible to impart large amounts of energy to the negative terminal plate. As a result, the welding strength on the negative electrode side tends to be low.

また、上記の理由により、取付可能なリード端子には制
約があり、肉厚のある強度の大きいリード端子の取り付
けは不可能であった。Further, due to the above-mentioned reasons, there are restrictions on the lead terminals that can be attached, and it has been impossible to attach lead terminals that are thick and strong.

本発明は上述した従来技術の欠点を解消するもので、負
極側のリード端子の取り付けに先立って、予備端子を負
極端子板にスポット溶接し、その後、リード端子を該予
備端子に溶接することにより、電池特性の低下を招くこ
となく、強度の大きいリード端子の強固な取り付けを可
能ならしめたのである。The present invention solves the above-mentioned drawbacks of the prior art by spot welding a spare terminal to the negative terminal plate before attaching the lead terminal on the negative side, and then welding the lead terminal to the spare terminal. This made it possible to securely attach lead terminals with high strength without causing deterioration in battery characteristics.

つぎに本発明の実施例を図面とともに説明する。Next, embodiments of the present invention will be described with reference to the drawings.

第１図は負極端子板に取り付ける前の予備端子およびリ
ード端子を示すもので、（１）は厚さＱ、　ｌ　ｆｆ。Figure 1 shows the spare terminal and lead terminal before they are attached to the negative terminal plate, and (1) shows the thickness Q, l ff.

直径１４ｆｌのニッケル円板よりなる予備端子で、（２
〕けリード端子であり、このリード端子（２）は先端部
が厚さ約０．８ｆｆの平担状に圧縮された直径０．７ｆ
ｆのニッケル線よりなるものである。A spare terminal made of a nickel disk with a diameter of 14fl, (2
] This lead terminal (2) has a diameter of 0.7f and the tip is compressed into a flat shape with a thickness of about 0.8ff.
It is made of f nickel wire.

第２図は上記予備端子（１）およびリード端子（２）が
取り付けられる扁平形リチウム電池を示すもので、（３
）は第１図に示したニッケル円板よりなる予備端子（１
）がスポット溶接されるニッケルーステンレス鋼クラッ
ド板製の負極端子板である。（４）は二酸化マンガン１
００部（重量部、以下同様）、りん状黒鉛１０部および
ポリテトラプルオルエチレン２部からなる合剤粉末を加
圧成形して々る正極で、（５）は正極（４）の集電体と
してのステンレス鋼製網である。Figure 2 shows a flat lithium battery to which the spare terminal (1) and lead terminal (2) are attached.
) is a spare terminal (1
) is a negative terminal plate made of a nickel-stainless steel clad plate that is spot welded. (4) is manganese dioxide 1
00 parts by weight (the same applies hereinafter), 10 parts of phosphorous graphite, and 2 parts of polytetrafluoroethylene. (5) is the current collector of the positive electrode (4). The body is made of stainless steel mesh.

（６）はニッケルーステンレス鋼クラッド板製の正極缶
でステンレス鋼面が電池内部側に配置されてお０、（７
）けポリプロピレン不織布よりなるセパレータで、（８
）はリチウム負極であり、このリチウム負極（８）は円
板状のリチウムを負極端子板（３）に挿入し、負極端子
板（３）の内面にスポット溶接されたステンレス鋼製網
（９）に圧着すること虻より構成されている。αＱはポ
リプロピレン製の環状ガスケットであり、この電池の電
解液にはプロピレンカーボネートと１．２−ジメトキシ
エタンとの容量比が２：ｌの混合溶媒に過塩素酸リチウ
ムを０．５モル／ｌ溶解させ九ものが使用されている。(6) is a positive electrode can made of a nickel-stainless steel clad plate, with the stainless steel side placed inside the battery.
) is a separator made of polypropylene nonwoven fabric, (8
) is a lithium negative electrode, and this lithium negative electrode (8) has a disc-shaped lithium inserted into a negative electrode terminal plate (3), and a stainless steel mesh (9) spot-welded to the inner surface of the negative electrode terminal plate (3). It consists of a fly that is crimped onto the body. αQ is an annular gasket made of polypropylene, and the electrolyte for this battery contains 0.5 mol/l of lithium perchlorate dissolved in a mixed solvent of propylene carbonate and 1,2-dimethoxyethane with a volume ratio of 2:l. Nine items are used.

α力は電池の外周部にかぶせた熱収縮性塩化ビニル樹脂
チューブで、これは後に取り付けられる負極側のリード
端子と正極缶（６）との間の短絡を防止する念めのもの
である。The alpha force is a heat-shrinkable vinyl chloride resin tube placed over the outer periphery of the battery, and is intended to prevent short circuits between the negative electrode lead terminal and the positive electrode can (6), which will be attached later.

この電池への負極側のリード端子の取り付けは次に示す
ようにして行なわれる。The negative electrode lead terminal is attached to the battery in the following manner.

まず、負極端子板（３）の外面側に前記のニッケル円板
よりなる予備端子（１）をスポット溶接する。この際、
予備端子（１）の面積はリード端子（２）に比べて広い
ので、スポット溶接点（至）は第８図に示すように任意
の箇所にそれぞれ間隔をあけて複数個様ることが可能で
ある。しかも予備端子（１）の厚さは０．１ｆｆ程度と
薄りので、溶接に大きなエネルギーを要せず、従ってリ
ード端子（２）を直接負極端子板（３）に溶接する場合
に比べてリチウム負極（８）に及ぼす熱影響が少ない。First, the preliminary terminal (1) made of the nickel disk described above is spot welded to the outer surface of the negative terminal plate (3). On this occasion,
Since the area of the spare terminal (1) is wider than that of the lead terminal (2), it is possible to place multiple spot welding points (to) at any desired location at intervals, as shown in Figure 8. be. Moreover, since the thickness of the preliminary terminal (1) is as thin as about 0.1ff, welding does not require a large amount of energy. There is little thermal influence on the negative electrode (8).

つぎ忙、この予備端子（１）に前記のニッケル線よりな
るリード端子（２）の平担状にした先端部を当接しスポ
ット溶接″する。この溶接には前記予備端子（１）の溶
接時より高いエネルギーを要するが、リード端子（２）
を直接負極端子板（３）に溶接する場合に比べて、溶接
点からリチウム負極（８）までの距離が前記予備端子（
１）によって長くカリ、そのぶんリチウム負極（８）に
伝わる熱が少なくなって、リチウムの溶融が抑制され、
内部短絡の発生が防止される。Next, the flat tip of the lead terminal (2) made of the nickel wire is brought into contact with this preliminary terminal (1) and spot welded. Although it requires higher energy, lead terminal (2)
Compared to the case where the lithium negative electrode (8) is directly welded to the negative electrode terminal plate (3), the distance from the welding point to the lithium negative electrode (8) is
By 1), the potash stays for a long time, and the heat transferred to the lithium negative electrode (8) is reduced, suppressing the melting of lithium.
Internal short circuits are prevented from occurring.

正極側でも、正極缶（６）の外面側に前記負極側のリー
ド端子（２）と同形状のリード端子（２）がスポット溶
接され、第４図に示すようなリード端子（２）、（６）
付き扁平形リチウム電池が形成される。なお、正極側は
□正極リード端子０２をスポット溶接するための熱程度
では正極（４）はあまり大きな影響を受けないので、予
備端子を特に必要とし々い。On the positive electrode side as well, a lead terminal (2) having the same shape as the lead terminal (2) on the negative electrode side is spot welded to the outer surface of the positive electrode can (6), and the lead terminals (2) as shown in FIG. 6)
A flat lithium battery is formed. In addition, on the positive electrode side, the positive electrode (4) is not greatly affected by the heat required for spot welding the positive electrode lead terminal 02, so a spare terminal is often required.

本発明において、予備端子（１）としては例えばステン
レス鋼板、ニッケル板、ニッケルメッキまたは錫メッキ
力どを施した鉄板などが好ましく、またその厚さは０．
０１〜０．２ｍｌ程度が好ましい。In the present invention, the preliminary terminal (1) is preferably, for example, a stainless steel plate, a nickel plate, a nickel-plated or tin-plated iron plate, and the thickness thereof is 0.
The amount is preferably about 0.01 to 0.2 ml.

負極側のリード端子（２）、正極側のリード端子（２）
としては例えばニッケル線、ニッケルメッキまたは錫メ
ッキした鉄線あるいはステンレス鋼線で直径が０．７〜
１．０ｓｎｒでスポット溶接に供される先端部け厚さ０
．８１ｆｆ程度にプレスして平担状に圧縮したものを用
いるのが好ましい。Negative lead terminal (2), positive lead terminal (2)
For example, nickel wire, nickel-plated or tin-plated iron wire, or stainless steel wire with a diameter of 0.7~
Thickness of the tip used for spot welding at 1.0snr is 0
．． It is preferable to use one that has been pressed to about 81ff and compressed into a flat shape.

つぎの第１表は上記のような本発明による場合と、従来
法により負極端子板に直接リード端子をスポット溶接し
たときに内部短絡が発生した電池個数を調べた結果を示
すものである。電池は直径２０Ｈ１高さくただし、負極
端子板（３）の上端までの高さで予備端子（１）および
負極側のリード端子（２）、正極側のリード端子（至）
の部分は含まない）３］ｇｇであり、本発明の場合は負
極端子板の外面側に直径１４ｆｆ、厚さ０．１鯖の円板
状のニッケル鈑よりなる予備端子（１）をスポット溶接
しくスポット溶接点０３は第８図に示すように４カ所で
ある）、その上に直径が０．７Ｎで先端部を厚さ０．８
ｆｆの平担状に圧縮し之ニッケル線よりなるリード端子
（２）をスポット溶接し九。従来法の場合は前述したよ
うに上記と同様のニッケル線よりなるリード端子を負極
端子板に直接スポット溶接した。Table 1 below shows the results of investigating the number of batteries in which internal short circuits occurred when the lead terminal was spot welded directly to the negative terminal plate using the conventional method and the case according to the present invention as described above. The battery has a diameter of 20H1, but the height is up to the top of the negative terminal plate (3), and the spare terminal (1), the lead terminal on the negative side (2), and the lead terminal on the positive side (toward).
In the case of the present invention, a preliminary terminal (1) made of a disk-shaped nickel plate with a diameter of 14 ff and a thickness of 0.1 mm is spot welded to the outer surface of the negative terminal plate. There are four spot welding points 03 as shown in Fig. 8), and on top of that, the diameter is 0.7N and the tip is 0.8mm thick.
9. Spot weld the lead terminal (2) made of nickel wire compressed into a flat shape of ff. In the case of the conventional method, as described above, a lead terminal made of a nickel wire similar to that described above was spot-welded directly to the negative terminal plate.

使用され九電池の負極端子板はＡずれも、厚さ０．２６
ｆｆのニッケルーステンレス鋼クラツド板よりつくられ
、リチクム負極には直径１４Ｈ１厚さ０．５鱈のリチウ
ム板が用いられている。リード端子（２］け前述のよう
にニッケル製で、このリード端子のスポット溶接時の条
件は蓄勢エネルギー４０Ｗ、Ｓ。The negative terminal plate of the nine batteries used has a deviation of A and a thickness of 0.26
FF nickel-stainless steel clad plate, and a lithium plate with a diameter of 14H and a thickness of 0.5 mm is used for the lithium negative electrode. The lead terminal (2) is made of nickel as mentioned above, and the conditions for spot welding this lead terminal are stored energy of 40 W and S.

通電時間２ｍＳ、加圧力２　ｋｆであり、本発明におけ
る予備端子（１）のスポット溶接条件は蓄勢エネルギー
１０Ｗ、Ｓ、通電時間２　ｍｓ、加圧力２ｋｇである。The current application time is 2 mS, and the applied force is 2 kf. The conditions for spot welding the preliminary terminal (1) in the present invention are the stored energy of 10 W, S, the current application time: 2 ms, and the applied force of 2 kg.

試験に供した電池個数は本発明法も従来法とも１００個
ずつである。The number of batteries tested was 100 for both the method of the present invention and the conventional method.

第　　１　　表 前記のようにリード端子のスポット溶接条件を同条件と
したが、本発明ｆよる場合は第１表に示すように内部短
絡の発生がまったくなかった。また本発明による電池は
リード端子の溶接強度が充分であり、リード端子の剥離
がなかった。Table 1 The spot welding conditions for the lead terminals were the same as described above, but as shown in Table 1, no internal short circuit occurred at all in the case of invention f. Further, in the battery according to the present invention, the welding strength of the lead terminals was sufficient, and there was no peeling of the lead terminals.

また、本発明によればリード端子（２）、（至）の取り
付けを一般用途用に完全に仕上げされ念完成電池に対し
て行なえるので、リード端子の取り付けのために、電池
製造時から特別仕様にし彦ければならな旨という制約が
なく、電池そのものは一般用途用と共通できるので実用
価値が非常に大きい。Furthermore, according to the present invention, the lead terminals (2) and (2) can be attached to a completely finished battery for general use, so special care is required from the time of battery manufacture for the attachment of the lead terminals. There is no restriction that specifications must be met, and the batteries themselves can be used for general purposes, so they have great practical value.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は負極端子１ｉＫ取り付ける前の予備端子および
リード端子を示す斜視図であり、第２図は扁平形リチク
ム電池を示す断面図である。第８図は予備端子を負極端
子板にスポット溶接した扁平形リチウム電池を示す斜視
図であり、第４図は本発明の方法により製造されたリー
ド端子付き扁平形リチクム電池の一例を示す断面図であ
る。 （１）・・・予備端子、（２）・・・負極側のリード端
子、（３）・・・負極端子板、（４）・・・正極、　（
６）・・・正極缶、（８）・・・リチクム負極、　（至
）・・・正極側のリード端子穴１図 ７２図FIG. 1 is a perspective view showing a spare terminal and a lead terminal before attachment of the negative electrode terminal 1iK, and FIG. 2 is a sectional view showing a flat lithicium battery. FIG. 8 is a perspective view showing a flat lithium battery with a spare terminal spot welded to the negative terminal plate, and FIG. 4 is a sectional view showing an example of a flat lithium battery with lead terminals manufactured by the method of the present invention. It is. (1)...Spare terminal, (2)...Negative electrode side lead terminal, (3)...Negative terminal plate, (4)...Positive electrode, (
6)...Positive electrode can, (8)...Lithicum negative electrode, (To)...Lead terminal hole on positive electrode side 1 Figure 72

Claims (1)

【特許請求の範囲】 １、　電気取りａしのためのリード端子を溶接により電
池に取り付けてなるリード端子付き扁平形リチウム電池
の製造にあたり、リチウム負極を内填した負極端子板の
外面側に厚さ０．０１〜０．２園の金属板よりなる予備
端子をスポット溶接し、その後、負極側のリード端子を
上記予備端子に溶接することを特徴とする扁平形リチウ
ム電池の製造法。 ２、前記リード端子が溶接する部分は平担状で本体部分
は断面円形である特許請求の範囲第１項記載のリード端
子付き扁平形リチウム電池の製造法。[Claims] 1. In manufacturing a flat lithium battery with a lead terminal in which a lead terminal for electricity supply a is attached to the battery by welding, a thick A method for manufacturing a flat lithium battery, comprising spot welding a preliminary terminal made of a metal plate with a diameter of 0.01 to 0.2 or so, and then welding a lead terminal on the negative electrode side to the preliminary terminal. 2. The method for manufacturing a flat lithium battery with lead terminals according to claim 1, wherein the portion to which the lead terminals are welded has a flat shape and the main body portion has a circular cross section.
JP58043883A 1983-03-16 1983-03-16 Production method of flat lithium cell with lead terminals Pending JPS59169058A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58043883A JPS59169058A (en) 1983-03-16 1983-03-16 Production method of flat lithium cell with lead terminals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58043883A JPS59169058A (en) 1983-03-16 1983-03-16 Production method of flat lithium cell with lead terminals

Publications (1)

Publication Number Publication Date
JPS59169058A true JPS59169058A (en) 1984-09-22

Family

ID=12676103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58043883A Pending JPS59169058A (en) 1983-03-16 1983-03-16 Production method of flat lithium cell with lead terminals

Country Status (1)

Country Link
JP (1) JPS59169058A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189562U (en) * 1985-05-17 1986-11-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189562U (en) * 1985-05-17 1986-11-26
JPH0433651Y2 (en) * 1985-05-17 1992-08-12

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