JPS62283554A - Manufacture of cell with lead terminal - Google Patents
Manufacture of cell with lead terminalInfo
- Publication number
- JPS62283554A JPS62283554A JP61127506A JP12750686A JPS62283554A JP S62283554 A JPS62283554 A JP S62283554A JP 61127506 A JP61127506 A JP 61127506A JP 12750686 A JP12750686 A JP 12750686A JP S62283554 A JPS62283554 A JP S62283554A
- Authority
- JP
- Japan
- Prior art keywords
- lead terminal
- terminal
- battery
- laser
- cell
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000003466 welding Methods 0.000 claims abstract description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 abstract 2
- 238000001579 optical reflectometry Methods 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〈産業上の利用分野〉
この発明は、プリン１一基板などへの直付は用のリード
端子をその端子面に固着してなるリード端子付き電池の
製造方法に関するものである。[Detailed Description of the Invention] 3. Detailed Description of the Invention <Industrial Application Field> This invention provides a lead terminal which is made by fixing a lead terminal for direct attachment to a printed circuit board, etc. to the terminal surface thereof. The present invention relates to a method of manufacturing a battery with an attached battery.
〈従来の技術〉
この種のリード端子付き電池はエレクトロ機器内のＩＣ
メモリのバックアップ用電源などとして用いられており
、長期にわたって安定に動作させるために、偏平形電池
や円筒形電池などの電池の端子面に０．２ｍｍ程度の厚
さの金属板おるいは金属線などでできたリード端子の一
端部をレーザ溶接などによって直接固着し、またこのリ
ード端子の他端部を基板端子穴などに半田により直付け
する構造が取られている。上記のようにレーザ溶接でリ
ード端子を固着する場合には、一般的に、電池端子面に
リード端子の一端部を密着させて載置し、上部よりリー
ド端子他端部の溶接個所にレーザビームを当てて瞬間的
に高温に加熱するといった方法が行なわれている。<Conventional technology> This type of battery with lead terminals is used for ICs in electronic devices.
It is used as a backup power source for memory, etc., and in order to ensure stable operation over a long period of time, a metal plate or metal wire with a thickness of about 0.2 mm is installed on the terminal surface of batteries such as flat batteries and cylindrical batteries. A structure is adopted in which one end of a lead terminal made of a metal or the like is directly fixed by laser welding or the like, and the other end of this lead terminal is directly attached to a board terminal hole or the like by soldering. When fixing lead terminals by laser welding as described above, generally one end of the lead terminal is placed in close contact with the battery terminal surface, and the laser beam is applied from above to the welding point of the other end of the lead terminal. One method is to instantaneously heat the material to a high temperature.
〈発明が解決しようとする問題点〉
しかしながら、リード端子と電池端子面とのレーザ溶接
において従来技術では次のような問題があった。<Problems to be Solved by the Invention> However, the prior art has the following problems in laser welding between lead terminals and battery terminal surfaces.
まず、溶接強度と電池内部への熱的影響の大きざとは密
接な関係にあり、十分な溶接強度を得るために溶接時の
レーザーパワーを上げると電池内部では加熱による活物
質やセパレータの損傷などが起こり易く、逆に熱的影響
を小ざくするためにレーザーパワーを下げた揚台には溶
接強度が不足して取扱い中に電池端子面からリード端子
が外れたりする。このため、実用的な上記溶接の設定条
件は非常に狭い範囲となり、レーザーパワーが僅かでも
変動するとその影響が直ちに製品の品質に現われるため
、溶接条件の管理は困難を極めるという問題がおる。特
に、負極端子板の板厚が比較的薄く且つ熱的影響をうけ
易いリチウム負極の薄層を負極端子板の裏側に密着させ
てなる偏平形リチウム電池においては上記の問題は顕著
である。また、上記のような製品の品質の変＠要因は部
品についてもおり、なかでもリード端子溶接部のレーザ
ービーム受光側の表面状態のバラツキはその寄与が大き
く、この表面の平滑度、光沢、平坦性おるいは汚れ等も
重大な管理ポイントであり、これらを適正な状態に保つ
ための多大な手間を必要とし、その分工程の煩雑化を招
くといった問題もある。First, there is a close relationship between welding strength and the degree of thermal influence inside the battery.If the laser power during welding is increased to obtain sufficient welding strength, the active material and separator may be damaged due to heating inside the battery. On the other hand, the welding strength of the lifting platform, which has been lowered in laser power to reduce thermal effects, is insufficient and lead terminals may come off from the battery terminal surface during handling. For this reason, the practical setting conditions for welding are within a very narrow range, and even a slight variation in laser power immediately affects the quality of the product, making it extremely difficult to manage welding conditions. In particular, the above problem is significant in flat lithium batteries in which the negative terminal plate is relatively thin and a thin layer of lithium negative electrode, which is easily affected by heat, is closely adhered to the back side of the negative terminal plate. In addition, the above-mentioned factors that cause changes in product quality are also related to parts, and among them, variations in the surface condition on the laser beam receiving side of the lead terminal welding part have a large contribution, and the smoothness, gloss, and flatness of this surface are particularly important. Dust, dirt, etc. are also important points to control, and maintaining them in proper conditions requires a great deal of effort, which leads to the problem of complicating the process.
〈問題点を解決するための手段〉
この発明のリード端子付き電池の製造方法は、リード端
子を電池端子面にレーザ溶接してなるリード端子付き電
池の製造方法であって、リード端子は、レーザ溶接前に
、少なくともその溶接部のレーザビーム受光面に光反射
率の小さい皮膜を形成したものであることを要旨とする
。<Means for Solving the Problems> The method for manufacturing a battery with a lead terminal of the present invention is a method for manufacturing a battery with a lead terminal in which a lead terminal is laser welded to a battery terminal surface, and the lead terminal is welded by laser welding. The gist is that a film with low light reflectance is formed on at least the laser beam receiving surface of the welded portion before welding.
〈作 用〉
上記皮膜を設りることでリード端子表面におけるレーザ
ービームの吸収率が向上する。このため、溶接時におい
て１パルス当りまたは単位時間当りのレーザーパワーの
設定値を小さくできて溶接条件の管理が比較的容易とな
るから製作が容易化し、また溶接強度の低下を招くこと
なく電池内部への熱的影響を低減できるので製品でおる
リード端子付き電池の品質向上を図れる。更に、１ノ一
ド端子表面で吸収されるレーザーパワーのバラツキが著
しく少なくなるので、必要な溶接強度が確実に得られて
製品の品質が非常に安定となる。<Function> By providing the above film, the absorption rate of the laser beam on the surface of the lead terminal is improved. For this reason, during welding, the set value of laser power per pulse or unit time can be reduced, making it relatively easy to manage welding conditions, which simplifies manufacturing. Since the thermal influence on the battery can be reduced, the quality of batteries with lead terminals can be improved. Furthermore, since the variation in the laser power absorbed on the surface of the single-node terminal is significantly reduced, the necessary welding strength is reliably obtained and the quality of the product is extremely stable.
〈実施例〉
以下にこの発明を偏平形リチウム電池を用いてなるリー
ド端子付き電池の製造方法に適用した実施例について説
明する。<Example> An example in which the present invention is applied to a method of manufacturing a battery with lead terminals using a flat lithium battery will be described below.
第１図（Ａ）は偏平形リチウム電池１の負極端子板２の
表面にリード端子３を溶接した状態を示したもので、図
中２ケ所の「×」は両者の溶接部を指す。この偏平形リ
チウム電池１は、第１図（８）のように偏平な正極缶４
と上記負極端子板２とを絶縁ガスケット５を介して組合
せて作った電池ケース内に、正極合剤６とリチウム負極
７とをセパレータ８を介して対向させてなる発電要素を
収納して構成される。また、リード端子３の表面には第
１図（Ｃ）に明示したように黒またはこれに類する色調
の、レーザービームの反射率の小ざい皮膜９が形成され
ている。FIG. 1(A) shows a state in which a lead terminal 3 is welded to the surface of a negative terminal plate 2 of a flat lithium battery 1, and the two "X"s in the figure indicate the welded portions of both. This flat lithium battery 1 has a flat positive electrode can 4 as shown in FIG. 1 (8).
A power generation element made of a positive electrode mixture 6 and a lithium negative electrode 7 facing each other with a separator 8 in between is housed in a battery case made by combining the negative electrode terminal plate 2 and the negative electrode terminal plate 2 with an insulating gasket 5 interposed therebetween. Ru. Further, as shown in FIG. 1C, a coating 9 of black or a similar color tone and having a low reflectance to the laser beam is formed on the surface of the lead terminal 3.
このような皮膜９は、具体的にはカーボン粉末などを揮
発性溶剤と共に塗布後乾燥させて形成したカーボンを主
成分とする導電性皮膜や、リード端子表面を高温に加熱
するなどして同表面に形成した酸化皮膜などでおる。Specifically, such a film 9 is a conductive film whose main component is carbon, which is formed by coating carbon powder or the like with a volatile solvent and then drying it, or a conductive film whose main component is carbon, which is formed by coating the surface of the lead terminal at a high temperature, etc. It is covered by an oxide film formed on the surface.
以上のリード端子付き電池においてリード端子３を負極
端子板２にレーザー溶接する手順は、第１図（８）のよ
うに同端子板２の表面に、上記皮膜９を上面に位置させ
たリード端子３を密着して載置し、次いで上部よりレー
ザービーム１０をリード端子３の溶接部に当てる。この
時、図示したように、リード端子３及び皮膜９の表面よ
りやや手前でレーザービーム１０がその焦点を結ぶよう
にしてレーザー溶接による電池内部の発熱を最小限にす
る。このレーザービーム１０によってリード端子３及び
負極端子板２の溶接部は瞬時に加熱・溶融して溶着し、
同ビーム１０の照射後は冷却・固化して両者の溶接がな
される。The procedure for laser welding the lead terminal 3 to the negative terminal plate 2 in the battery with lead terminals described above is as follows: As shown in FIG. 3 are placed in close contact with each other, and then a laser beam 10 is applied to the welded portion of the lead terminal 3 from above. At this time, as shown in the figure, the laser beam 10 is focused slightly before the surfaces of the lead terminals 3 and the film 9 to minimize heat generation inside the battery due to laser welding. The welded parts of the lead terminal 3 and the negative terminal plate 2 are instantly heated and melted by this laser beam 10, and are welded.
After being irradiated with the beam 10, it is cooled and solidified to weld the two together.
〈発明の効果〉
以上のように構成されるこの発明のリード端子付き電池
の製造方法によれば、リード端子に設けた前記皮膜によ
ってリード端子溶接部の表面におけるレーザービーム吸
収率が向上することから、レーザーパワーの設定値を小
ざくできて溶接条件の管理並びに製作が容易化すると共
に、電池内部への熱的影響が低減してリード端子付き電
池の品質向上を図ることができる。また、リード端子表
面で吸収されるレーザーパワーのバラツキが著しく低減
して製品の品質が非常に安定化する他、上記のようにレ
ーザーパワーの設定を小さくできるので、従来法と比較
してレーザー装置の能力からみて同装置の高速稼動が可
能となり、生産性向上を図ることができるといった効果
を奏する。<Effects of the Invention> According to the method for manufacturing a battery with lead terminals of the present invention configured as described above, the coating provided on the lead terminals improves the laser beam absorption rate on the surface of the welded part of the lead terminals. The set value of the laser power can be reduced, making it easier to manage welding conditions and manufacturing, and also to reduce the thermal influence on the inside of the battery, thereby improving the quality of the battery with lead terminals. In addition, the variation in the laser power absorbed on the lead terminal surface is significantly reduced, making the product quality extremely stable.As mentioned above, the laser power setting can be made smaller, so compared to the conventional method, the laser Considering its capacity, the device can be operated at high speed, which has the effect of improving productivity.
第１図（八）は本発明の製造方法により作製したリード
端子付き電池の斜視図、第１図（Ｂ）は本発明の製造方
法の一工程を示した断面図、第１図（Ｃ）は第１図（Ｂ
）の要部拡大図でおる。
１・・・偏平形リチウム電池、２・・・負極端子板、３
・・・リード端子、９・・・皮膜。FIG. 1(8) is a perspective view of a battery with lead terminals manufactured by the manufacturing method of the present invention, FIG. 1(B) is a sectional view showing one step of the manufacturing method of the present invention, and FIG. 1(C) is shown in Figure 1 (B
) is an enlarged view of the main parts. 1... Flat lithium battery, 2... Negative terminal plate, 3
... Lead terminal, 9... Film.
Claims (1)
ド端子付き電池の製造方法であって、該リード端子は、
該レーザ溶接前に、少なくともその溶接部のレーザビー
ム受光面に光反射率の小さい皮膜を形成したものである
ことを特徴とするリード端子付き電池の製造方法。 ２、皮膜がカーボンを主成分としてなる皮膜であること
を特徴とする特許請求の範囲第１項記載の製造方法。 ３、電池が負極端子面の裏側にリチウム負極を直接また
は集電体を介して密着させてなる偏平形リチウム電池で
あることを特徴とする特許請求の範囲第１項または第２
項記載の製造方法。[Claims] 1. A method for manufacturing a battery with a lead terminal by laser welding a lead terminal to a battery terminal surface, the lead terminal comprising:
A method for manufacturing a battery with lead terminals, characterized in that, before the laser welding, a film with low light reflectance is formed on at least the laser beam receiving surface of the welded portion. 2. The manufacturing method according to claim 1, wherein the film is a film containing carbon as a main component. 3. Claims 1 or 2, characterized in that the battery is a flat lithium battery in which a lithium negative electrode is closely attached to the back side of the negative terminal surface either directly or through a current collector.
Manufacturing method described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61127506A JPS62283554A (en) | 1986-06-02 | 1986-06-02 | Manufacture of cell with lead terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61127506A JPS62283554A (en) | 1986-06-02 | 1986-06-02 | Manufacture of cell with lead terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62283554A true JPS62283554A (en) | 1987-12-09 |
Family
ID=14961674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61127506A Pending JPS62283554A (en) | 1986-06-02 | 1986-06-02 | Manufacture of cell with lead terminal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62283554A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012054203A (en) * | 2010-09-03 | 2012-03-15 | Hitachi Vehicle Energy Ltd | Secondary battery and manufacturing method thereof |
| JP2014022167A (en) * | 2012-07-18 | 2014-02-03 | Shin Kobe Electric Mach Co Ltd | Method for manufacturing electrode plate group for battery, and electrode plate group for battery |
| WO2023159928A1 (en) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical apparatus |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59197390A (en) * | 1983-04-22 | 1984-11-08 | Toshiba Corp | Laser welding method |
| JPS60140649A (en) * | 1983-12-27 | 1985-07-25 | Matsushita Electric Ind Co Ltd | Cell with terminal |
-
1986
- 1986-06-02 JP JP61127506A patent/JPS62283554A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59197390A (en) * | 1983-04-22 | 1984-11-08 | Toshiba Corp | Laser welding method |
| JPS60140649A (en) * | 1983-12-27 | 1985-07-25 | Matsushita Electric Ind Co Ltd | Cell with terminal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012054203A (en) * | 2010-09-03 | 2012-03-15 | Hitachi Vehicle Energy Ltd | Secondary battery and manufacturing method thereof |
| US8507118B2 (en) | 2010-09-03 | 2013-08-13 | Hitachi Vehicle Energy, Ltd | Secondary battery and fabrication method thereof |
| JP2014022167A (en) * | 2012-07-18 | 2014-02-03 | Shin Kobe Electric Mach Co Ltd | Method for manufacturing electrode plate group for battery, and electrode plate group for battery |
| WO2023159928A1 (en) * | 2022-02-25 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical apparatus |
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