JPH0793128B2 - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JPH0793128B2 JPH0793128B2 JP62074675A JP7467587A JPH0793128B2 JP H0793128 B2 JPH0793128 B2 JP H0793128B2 JP 62074675 A JP62074675 A JP 62074675A JP 7467587 A JP7467587 A JP 7467587A JP H0793128 B2 JPH0793128 B2 JP H0793128B2
- Authority
- JP
- Japan
- Prior art keywords
- battery container
- battery
- lid
- nickel
- welded
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 59
- 238000007747 plating Methods 0.000 claims description 40
- 229910052759 nickel Inorganic materials 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000000630 rising effect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 2
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- UVDIQZVDGVRRLR-UHFFFAOYSA-N naphthalene;sodium Chemical compound [Na].[Na].C1=CC=CC2=CC=CC=C21 UVDIQZVDGVRRLR-UHFFFAOYSA-N 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- 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)
- Laser Beam Processing (AREA)
- Electroplating Methods And Accessories (AREA)
- Heat Treatment Of Articles (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はニッケルめっきを施した鋼製の電池容器の開口
端に同じくニッケルめっきを施した鋼製の蓋体を嵌着
し、それらの接合部をレーザ溶接により密封した密閉形
電池に係り、特にそのニッケルめっきの改良に関するも
のである。TECHNICAL FIELD The present invention relates to a nickel-plated steel battery container in which an open end of a nickel-plated steel battery container is fitted and a joint portion thereof is formed. The present invention relates to a sealed battery sealed by laser welding, and particularly to improvement of nickel plating thereof.
従来の技術 電子機器の発達などにより、長期信頼性のすぐれた電池
が要望され、電池の密封方法にも改良が加えられてき
た。高度の密封性を要求されるリチウム電池あるいは、
角形の密閉形アルカリ電池などにおいて従来のクリンプ
式封口法に代えて、金属製の電池容器の開口端に同じく
金属製の蓋体を嵌着し、それらの接合部を溶接して密封
する方式が採用されつつある。その溶接法として小型の
密閉式電池の場合、狭小な接合部を精度よく溶接可能な
レーザ溶接方式が多く採用されている。これらの電池の
電池容器と蓋体の組合せ形態としては、第４図側部断面
図に示したように発電要求12を収納した電池容器11の開
口端に、周縁が平板状の蓋体13を嵌着させる方式、ある
いは特開昭56−107470号公報などに開示されたごとく、
蓋体の周縁に設けた立上り部（第１図参考）が、円筒形
あるいは薄板形の電池容器の開口端内縁に接するように
嵌着させる方式などがあり、電池容器および蓋体の材質
として前記公報では、ステンレス鋼が用いられ、嵌着さ
れた電池容器と蓋体の接合部をレーザ溶接によって密封
するものであった。2. Description of the Related Art Due to the development of electronic devices and the like, batteries having excellent long-term reliability have been demanded, and improvements have been made in battery sealing methods. Lithium batteries that require a high degree of sealing performance, or
Instead of the conventional crimp-type sealing method for prismatic sealed alkaline batteries, there is a method in which a metallic lid is also fitted to the open end of a metallic battery container and the joints are welded and sealed. It is being adopted. As a welding method, in the case of a small sealed battery, a laser welding method capable of accurately welding a narrow joint is often used. As a combination form of the battery container and the lid of these batteries, as shown in the side sectional view of FIG. 4, a lid 13 having a flat peripheral edge is provided at the open end of the battery container 11 accommodating the power generation request 12. A method of fitting, or as disclosed in JP-A-56-107470, etc.,
There is a method in which a rising portion (see FIG. 1) provided on the periphery of the lid is fitted so as to come into contact with the inner edge of the open end of a cylindrical or thin plate-shaped battery container. In the publication, stainless steel is used, and the joint between the fitted battery container and the lid is sealed by laser welding.
発明が解決しようとする問題点 このような従来の構成では、特開昭57−74964号公報な
どに開示されているように、レーザ溶接により電池容器
を密封する場合、局部的に、瞬時的に溶接が可能である
ために電池本体への熱的影響が極めて少なく高精度の溶
接ができるなどの利点がある反面、レーザ光は直進性が
良く、また焦点の面積が極めて小さいため、被溶接面と
なる電池容器の開口端と蓋体の周縁あるいは立上り部の
端面により形成される接合部の形状，精度および材質な
どの影響を受けて不完全な溶接となって十分な密封状態
を得られないことがあった。レーザ溶接において、接合
部の材質が鉄材のような単一金属、あるいは前記特開昭
56−107470号公報に示されたごとくステンレス鋼などの
鉄系の合金材であって、それぞれの同種の金属部材間を
溶着する場合は材料自体による問題点は生じなく容易に
溶接できた。しかし電池容器表面の発錆防止、電池内外
部での接触抵抗を低くする、あるいは角形電池容器など
加工性の良い材料を求められる場合には、従来よりクリ
ンプ封口式密閉電池で用いられているような、鋼材を成
形し表面にニッケルめっきを施した電池容器及び蓋体を
用いる必要があったが、この構成にレーザ溶接封口方式
を適用した場合、前記したその接合部の上面をレーザ光
により溶着し形成した溶接部に、ひずみによると考えら
れる数十μｍ以下の微細なクラックが発生しやすいとい
う問題があった。このクラックの発生状態は、前記特開
昭57−74964号公報等にも述べられているような、電池
容器と蓋体の嵌合形状，精度の改良により若干改善され
るが、解消することはできず密封不十分となり、電池使
用時に電解液の漏出、ガスもれを生じやすいという問題
があった。Problems to be Solved by the Invention With such a conventional configuration, as disclosed in JP-A-57-74964 and the like, when the battery container is sealed by laser welding, locally and instantaneously. Since welding is possible, there is an advantage that the thermal influence on the battery main body is extremely small and high-precision welding is possible, but on the other hand, the laser beam has good straightness and the focal area is extremely small, so the surface to be welded Insufficient welding due to the shape, accuracy, and material of the joint formed by the open end of the battery container and the peripheral edge of the lid or the end face of the rising portion, and a sufficiently sealed state cannot be obtained. There was an occasion. In laser welding, the material of the joint is a single metal such as iron,
As shown in Japanese Patent Laid-Open No. 56-107470, when an iron-based alloy material such as stainless steel is welded between metal members of the same kind, there is no problem due to the material itself, and welding can be performed easily. However, when rust prevention on the surface of the battery container, reduction of contact resistance inside and outside the battery, or when a material with good workability such as a prismatic battery container is required, it seems that it has been used in crimp-sealed sealed batteries from the past. However, it was necessary to use a battery container and lid that were formed from steel and nickel-plated on the surface, but when the laser welding sealing method was applied to this configuration, the upper surface of the above-mentioned joint was welded by laser light. Then, there is a problem in that the formed welded portion is likely to have minute cracks of several tens of μm or less which are considered to be caused by strain. The state of occurrence of the cracks is slightly improved by improving the fitting shape and accuracy of the battery container and the lid as described in JP-A-57-74964, etc., but it cannot be resolved. There was a problem in that the electrolyte could not be leaked out and gas could leak when the battery was used because of insufficient sealing.
本発明はこのような問題点を解決するもので、鋼製の電
池容器及び蓋体に施されたニッケルめっき層を改良する
ことにより、溶接部に微細なクラックが発生するのを防
止することを目的とするものである。The present invention is to solve such problems, by improving the nickel plating layer applied to the steel battery container and the lid, to prevent the occurrence of fine cracks in the welded portion. It is intended.
問題点を解決するための手段 この問題点を解決するために本発明は、鋼製の電池容器
と蓋体に、少なくとも溶接される部分のめっき層の厚さ
を２〜10μｍとした電気ニッケルめっきを設け、600〜8
00℃の非酸化性雰囲気でアニール処理を行なったもので
ある。Means for Solving the Problems In order to solve this problem, the present invention provides an electric nickel plating in which a thickness of a plating layer of at least a welded portion is 2 to 10 μm on a battery container and a lid made of steel. , 600 ~ 8
It was annealed in a non-oxidizing atmosphere at 00 ° C.
作用 この構成により、レーザ光によって接合部が局部的、瞬
時的に溶融され冷却される際にニッケルめっき層の存在
によって生ずるひずみを抑制し、クラックの発生しない
溶接部を形成できることとなる。Operation With this configuration, it is possible to suppress the distortion caused by the presence of the nickel plating layer when the joint is locally and instantaneously melted and cooled by the laser light, and it is possible to form a weld without cracks.
実 施 例 第１図，第２図は本発明の一実施例による密閉形電池の
電池容器と蓋体の溶接部分及び電池側面の要部を示す縦
断面図である。第１図，第２図において、電池容器１及
び周縁に立上り部3aを有する蓋体３は冷間圧延鋼板を所
定の形状に成型し、次いで後述するように、厚さ２〜10
μｍのニッケルめっき層1a,3bを電気ニッケルめっき法
により形成した後、アニール処理を行なったものを用
い、電池容器１にニッケル・カドミウム系あるいはリチ
ウム系などの発電要素２を収納し、前記の蓋体３に絶縁
リング8bを介して端子ピン8aを固着して端子部８を形成
したものを前記電池容器１の開口端に嵌着し、蓋体３の
立上り部3a上端と電池容器１の開口端内縁で形成される
接合部４の上方から、第１図に示したようにYAGレーザ
装置等を用いてレーザ光５を照射して接合部４の上部を
溶着して一体化し溶接部６を形成することにより密封す
る。EXAMPLE FIG. 1 and FIG. 2 are vertical sectional views showing a welded portion of a battery container and a lid of a sealed battery according to an embodiment of the present invention and a main part of a side surface of the battery. In FIG. 1 and FIG. 2, the battery container 1 and the lid 3 having a rising portion 3a on the periphery are formed by forming a cold-rolled steel plate into a predetermined shape, and then, as described later, have a thickness of 2 to 10
A nickel-cadmium-based or lithium-based power generating element 2 is housed in a battery container 1 by using a nickel plated layer 1a, 3b having a thickness of 1 μm formed by an electric nickel plating method and then annealed. The terminal pin 8a is fixed to the body 3 through the insulating ring 8b to form the terminal portion 8, and the terminal portion 8 is fitted to the open end of the battery container 1, and the upper end of the rising portion 3a of the lid 3 and the opening of the battery container 1 are fitted. As shown in FIG. 1, laser light 5 is radiated from above the joint 4 formed at the inner edge to weld the upper portion of the joint 4 and integrate them to form a welded portion 6. Seal by forming.
次に、上記した電池容器１及び蓋体３の表面に形成する
ニッケルめっき層1a,3bについて詳述する。Next, the nickel plating layers 1a and 3b formed on the surfaces of the battery container 1 and the lid 3 described above will be described in detail.
本発明には、例えば硫酸ニッケルを主体とする普通浴あ
るいは硫酸ニッケルに塩化ニッケルを加えたワット氏浴
などの無光沢浴，またはこれらにナフタリン・ジ・スル
フォン酸ソーダなどの有機光沢剤を添加した光沢あるい
は半光沢めっき浴等のニッケルめっき液を用い電解析出
させる電気ニッケルめっきを適用し、少なくともレーザ
溶接される接合部４上端付近のめっき厚さを２〜10μｍ
としたニッケルめっき層を形成する。次いでめっきの酸
化を防止するためにアルゴン，窒素あるいはこれに若干
の水素を加えたガスを導入した、または真空とした非酸
化性加熱炉に、上記電気ニッケルめっきを施した電池容
器１及び蓋体３を入れ600〜800℃で15〜60分間加熱する
ことによって、めっき層1a,3bをアニール処理する。こ
の処理によって、処理前にニッケルめっき層の表面硬度
がビッカース硬度（ビッカース顕微硬度計で測定）Hv約
200〜500、平均的にはHv300〜450であったものが、Hv15
0〜250に低減される。このように、ニッケルめっきの硬
度が低減される電池容器１及び蓋体３の組み合せによ
り、レーザ溶接速度を３〜20mm/秒として第１図に示し
たごとく溶接をしたが、溶接部６にクラックの発生は見
られず、電解液の微量漏出も検出されなかった。本発明
のものが溶接性にすぐれているのは、本発明者らが各種
のニッケルめっきを比較検討した結果から得た知見によ
れば、次の理由によるものと考えられる。第３図は第１
図のものを拡大したレーザ溶接時の状況を示す要部断面
図であり、第１図に示したごとく、接合部４の上方より
レーザ光５を照射すると、電池容器１及び蓋体３の立上
り部3aのそれぞれの先端が第３図に示したように、各め
っき層1a,3b含めて溶融され、通常接合部に存在する若
干の間隙（約0.05〜0.2mm）を埋める形で一体に溶着
（固溶体）されて溶接幅w,溶接深さｄの溶接部６が形成
される。前記溶接時に、レーザ光により溶融された溶接
部６の近傍の容器１及び蓋体３の立上り部3aの先端部分
は、温度上昇により、第３図点線矢印（溶融時）のごと
く接合部４の間隙が狭まる方向に熱膨張し、冷却時に同
図実線矢印（冷却時）のように外方に向って収縮し、接
合部４に引張り応力を生じる。またレーザ光により溶融
された溶接部６は図示のごとく中央部分が深く溶融され
るため冷却時には外周から冷却が始まり、中央部分に向
って順次冷却されていき、図示矢印Ｃの付近が時間的に
最後に冷却されるためこの部分は引張り応力を受ける。
そのため全体として矢印Ｃの部分は、冷却される直前に
引張り応力によってクラックを生じやすい因子を持って
いる。前記において、電池容器及び蓋体の構成材として
ニッケルめっき層1a,3bを設けた鋼材を用いた場合は、
ステンレス鋼あるいは鋼板を単独で用いたときと異なり
溶接時に接合部４の付近は、鋼材とニッケルめっき層の
熱膨張係数、融点、融解熱などの物性の差による反り、
ねじれを含む熱的変形ひずみが付加される。このひずみ
の大きさは、ニッケルめっき層の内部応力が大きいほ
ど、まためっき厚さが大になると大きくなる。同様に溶
接部６では溶融時にニッケル及びその添加物が鋼材中に
拡散し固溶体をつくるが、レーザ溶接における溶融〜冷
却の時間は非常に短いため溶接部の組成、結晶状態が不
均一となり内部のひずみが大きくなりやすい。本発明の
対象となる比較的小型の電池をレーザ溶接により封止す
る場合、第３図の溶接部６の溶接幅ｗは0.4〜1mm,溶接
深さｄは0.1〜0.3mm程度と小さいため、前記したニッケ
ルめっき層1a,3bの厚さ及びその物性の影響は大きく、
従来から用いられている溶接のための規制をされないニ
ッケルめっきを施したものでは上述したひずみによる応
力が過大となる場合が多く、その結果溶接部６に前述し
たクラックが発生しやすいものと考えられる。また上記
したニッケルめっき層の内部のひずみすなわち内部応力
は、めっき層の硬度（本発明の対象となるニッケルめっ
き層の場合、ビッカース顕微硬度計を用いて測定した
値）と比例することがわかった。本発明は上記検討結果
に基づき、ニッケルめっき層を改質、規制することによ
って、レーザ溶接時にめっき層の応力ひずみ及び溶接部
の溶融時の組成不均一性を低減せしめて、溶接部のクラ
ック発生防止を可能ならしめたものである。即ち、実施
例で述べたように、従来から用いられている各種電気ニ
ッケルめっき層の硬度は、ビッカース硬度でHv 200〜50
0であり多くはHv 300以上となり、溶接部にクラックを
生じるような内部応力を有していた。本発明では、非酸
化性雰囲気下で600〜800℃に加熱・アニール処理し、ニ
ッケルめっき層の硬度をHv 280以下、好ましくはHv 150
〜250とすると共に、少なくとも溶接される接合部４の
周縁付近のめっき層の厚さを２〜10μｍの範囲に規制す
ることによって、めっき層のひずみを軽減し、溶接部の
微小クラック発生防止を実現したものである。上記にお
いて、アニール処理する温度は、600℃以下では効果が
不十分であり、800℃以上では、鋼材を含めて軟化が著
しく、電池容器としての耐圧強度が低下するので不適当
である。また、めっき層の厚さが２μｍ以下の場合は、
溶接性は問題ないが電池を多湿下あるいは長期間使用す
る際に溶接部に発錆・腐食による強度低下を生じやすく
なるので好ましくない。In the present invention, for example, a normal bath mainly composed of nickel sulfate or a matte bath such as Watt's bath in which nickel chloride is added to nickel sulfate, or an organic brightener such as naphthalene disodium sulfonate is added thereto. Applying electro-nickel plating for electrolytic deposition using a nickel plating solution such as a bright or semi-bright plating bath, and at least the plating thickness near the upper end of the joint 4 to be laser welded is 2 to 10 μm.
Forming a nickel plating layer. Then, in order to prevent the oxidation of the plating, a non-oxidizing heating furnace introduced with argon, nitrogen, or a gas obtained by adding a little hydrogen to this, or in a vacuum, is placed in the non-oxidizing heating furnace. 3 is put and heated at 600 to 800 ° C. for 15 to 60 minutes to anneal the plated layers 1a and 3b. By this treatment, the surface hardness of the nickel plating layer before treatment is Vickers hardness (measured by a Vickers microscope hardness meter) Hv approx.
200-500, Hv300-450 on average, Hv15
It is reduced to 0-250. Thus, the combination of the battery container 1 and the lid body 3 in which the hardness of the nickel plating is reduced was welded as shown in FIG. 1 at a laser welding speed of 3 to 20 mm / sec. Was not observed, and no minute leakage of electrolyte was detected. The reason why the present invention is excellent in weldability is considered to be as follows, based on the findings obtained by the present inventors through comparative examination of various nickel platings. Figure 3 is the first
FIG. 3 is an enlarged cross-sectional view of a main part showing a situation at the time of laser welding in which the one shown in the figure is enlarged. As shown in FIG. 1, when a laser beam 5 is radiated from above the joining part 4, the battery container 1 and the lid 3 stand up. As shown in FIG. 3, each tip of the portion 3a is melted together with the plating layers 1a and 3b, and is welded together so as to fill a small gap (about 0.05 to 0.2 mm) that is usually present in the joint portion. (Solid solution) to form a welded portion 6 having a welding width w and a welding depth d. At the time of the welding, the tip portion of the rising portion 3a of the container 1 and the lid 3 in the vicinity of the welded portion 6 melted by the laser beam is heated by the temperature rise, and as shown by the dotted line arrow in FIG. Thermal expansion is performed in the direction in which the gap is narrowed, and when cooled, it contracts outward as indicated by a solid arrow in the figure (when cooled), and a tensile stress is generated in the joint portion 4. Further, as shown in the figure, the welded portion 6 melted by the laser beam is deeply melted in the central portion, so that the cooling starts from the outer periphery at the time of cooling and is gradually cooled toward the central portion. Since it is finally cooled, this part is under tensile stress.
Therefore, as a whole, the portion indicated by the arrow C has a factor that tends to cause cracks due to tensile stress immediately before cooling. In the above, when using a steel material provided with nickel plating layers 1a, 3b as a constituent material of the battery container and the lid,
Unlike the case where stainless steel or a steel plate is used alone, the vicinity of the joint 4 during welding is warped due to differences in physical properties such as the thermal expansion coefficient, melting point, and heat of fusion between the steel material and the nickel plating layer,
Thermal deformation strain including torsion is added. The magnitude of this strain increases as the internal stress of the nickel plating layer increases and as the plating thickness increases. Similarly, in the weld zone 6, nickel and its additives diffuse into the steel material during melting to form a solid solution. However, since the melting-cooling time in laser welding is very short, the composition and crystal state of the weld zone become non-uniform, and The strain tends to be large. When a relatively small battery to be the subject of the present invention is sealed by laser welding, the welding width w of the welded portion 6 in FIG. 3 is 0.4 to 1 mm, and the welding depth d is about 0.1 to 0.3 mm. The thickness of the nickel plating layers 1a, 3b and the influence of the physical properties thereof are large,
Conventionally used unplated nickel-plated products often have excessive stress due to the strain described above, and as a result, the above-described cracks are likely to occur in the welded portion 6. . Further, it was found that the above-mentioned internal strain of the nickel plating layer, that is, the internal stress, is proportional to the hardness of the plating layer (in the case of the nickel plating layer which is the object of the present invention, the value measured using a Vickers microscopic hardness meter). . The present invention is based on the above-mentioned examination results, by modifying and regulating the nickel plating layer, by reducing the stress strain of the plating layer during laser welding and the composition nonuniformity at the time of melting of the welded portion, cracking of the welded portion occurs. It is something that can be prevented. That is, as described in the examples, the hardness of various conventionally used electroless nickel plating layers is Hv 200 to 50 in Vickers hardness.
It was 0, and most of them had Hv of 300 or more, and had an internal stress that caused a crack in the welded part. In the present invention, heating / annealing is performed at 600 to 800 ° C. in a non-oxidizing atmosphere, and the hardness of the nickel plating layer is Hv 280 or less, preferably Hv 150.
To 250, and at least the thickness of the plating layer near the periphery of the joint 4 to be welded is regulated within the range of 2 to 10 μm to reduce the distortion of the plating layer and prevent the occurrence of microcracks in the weld. It was realized. In the above, if the annealing temperature is 600 ° C. or lower, the effect is insufficient, and if it is 800 ° C. or higher, the softening including steel material is remarkable, and the pressure resistance of the battery container is lowered, which is not suitable. When the thickness of the plating layer is 2 μm or less,
Weldability is not a problem, but when the battery is used in high humidity or for a long period of time, the strength of the weld tends to decrease due to rusting and corrosion, which is not preferable.
なお、本発明において無電解ニッケルめっき法の適用は
困難である。それは、ニッケルめっきの組成がNi−Ｐな
どの合金の場合、アニール処理をしても、硬度低下が不
十分であり内部ひずみも多いこと、また融点が、鋼材よ
り低くなり、溶接性を低下させるなどの問題を有するた
めである。 It is difficult to apply the electroless nickel plating method in the present invention. This is because when the composition of nickel plating is an alloy such as Ni-P, even if annealing is performed, the hardness is insufficiently reduced and internal strain is large, and the melting point is lower than that of steel, which deteriorates weldability. This is because it has problems such as
次に本発明による実施例と他のめっき法によるものを、
めっき層の厚さを含めて比較した結果を第１表に示す。
本発明による実施例A1）が、溶接部６のクラック発生防
止に効果のあることがわかる。Next, an example according to the present invention and another plating method,
Table 1 shows the results of comparison including the thickness of the plating layer.
It can be seen that the example A1) according to the present invention is effective in preventing the occurrence of cracks in the welded portion 6.
発明の効果 以上のように本発明によれば、鋼製の電池容器と蓋体
に、少なくとも溶接される部分のめっき層の厚さを２〜
10μｍとした電気ニッケルめっきを施した後、600〜800
℃の非酸化性雰囲気でアニール処理を行ったものを用い
ることにより、ニッケルめっきによる応力ひずみを軽減
しレーザ溶接時に溶接部に微細なクラックが発生するの
を防止し、長期信頼性の高い密閉形電池を提供できると
いう効果が得られる。EFFECTS OF THE INVENTION As described above, according to the present invention, the thickness of the plating layer of at least the portion to be welded is 2 to the battery container and the lid made of steel.
600-800 after electroplating nickel with 10μm
By using the one that has been annealed in a non-oxidizing atmosphere at ℃, the stress strain due to nickel plating is reduced and the generation of fine cracks in the weld during laser welding is prevented. The effect that a battery can be provided is obtained.
第１図，第２図，第３図は本発明に係り、第１図は本発
明の一実施例による密閉形電池のレーザ溶接部分を示す
要部断面図、第２図は電池側面の要部断面図、第３図は
溶接時の状況を示す溶接部分の側面要部拡大図であり、
第４図は従来の電池の構造を示す要部断面図である。 １……電池容器、1a……ニッケルめっき層、２……発電
要素、３……蓋体、3a……立上り部、3b……ニッケルめ
っき層、４……接合部、５……レーザ光、６……溶接
部、８……端子部。1, 2, and 3 relate to the present invention. FIG. 1 is a sectional view of a main part showing a laser welding portion of a sealed battery according to an embodiment of the present invention, and FIG. Part sectional view, FIG. 3 is an enlarged view of the main part of the side of the welded part showing the situation during welding,
FIG. 4 is a cross-sectional view of an essential part showing the structure of a conventional battery. 1 ... Battery container, 1a ... Nickel plated layer, 2 ... Power generating element, 3 ... Lid, 3a ... Rising part, 3b ... Nickel plated layer, 4 ... Junction part, 5 ... Laser beam, 6 ... Welded part, 8 ... Terminal part.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−51457（ＪＰ，Ａ) 特開 昭63−146344（ＪＰ，Ａ) 特開 昭61−79729（ＪＰ，Ａ) 特開 昭58−46658（ＪＰ，Ａ) 特公 昭53−39374（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-59-51457 (JP, A) JP-A-63-146344 (JP, A) JP-A 61-79729 (JP, A) JP-A 58- 46658 (JP, A) Japanese Patent Sho 53-39374 (JP, B2)
Claims (1)
体を嵌着し、それらの接合部をレーザ溶接により密封す
る電池において、前記電池容器と蓋体は鋼製であって、
少なくとも溶接される部分にはめっき層の厚さが２〜10
μｍの電気ニッケルめっきを設け、600〜800℃の非酸化
性雰囲気でアニール処理をしたものからなることを特徴
とする密閉形電池。1. A battery in which a lid is fitted to an open end of a battery container accommodating a power-generating element, and a joint portion thereof is sealed by laser welding, wherein the battery container and the lid are made of steel,
The thickness of the plating layer should be 2-10 at least in the part to be welded.
A sealed battery characterized in that it is provided with an electric nickel plating of μm and is annealed in a non-oxidizing atmosphere at 600 to 800 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074675A JPH0793128B2 (en) | 1987-03-27 | 1987-03-27 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62074675A JPH0793128B2 (en) | 1987-03-27 | 1987-03-27 | Sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63239764A JPS63239764A (en) | 1988-10-05 |
| JPH0793128B2 true JPH0793128B2 (en) | 1995-10-09 |
Family
ID=13554040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62074675A Expired - Lifetime JPH0793128B2 (en) | 1987-03-27 | 1987-03-27 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0793128B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014126075A (en) * | 2012-12-25 | 2014-07-07 | Seiko Instruments Inc | Antifriction bearing device, hard disk drive device, and manufacturing method of antifriction bearing device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6716554B2 (en) * | 1999-04-08 | 2004-04-06 | Quallion Llc | Battery case, cover, and feedthrough |
| US6554178B1 (en) | 1999-04-08 | 2003-04-29 | Quallion Llc | Battery case feedthrough |
| JP7120487B1 (en) * | 2020-10-21 | 2022-08-17 | 日本製鉄株式会社 | battery case |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5339374B2 (en) | 2006-08-10 | 2013-11-13 | クーム インコーポレーテッド | Catalytic air oxidation hair color |
-
1987
- 1987-03-27 JP JP62074675A patent/JPH0793128B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5339374B2 (en) | 2006-08-10 | 2013-11-13 | クーム インコーポレーテッド | Catalytic air oxidation hair color |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014126075A (en) * | 2012-12-25 | 2014-07-07 | Seiko Instruments Inc | Antifriction bearing device, hard disk drive device, and manufacturing method of antifriction bearing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63239764A (en) | 1988-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7122045B2 (en) | Method for manufacturing corrosion resistant hot stamped parts | |
| US10883161B2 (en) | Method for manufacturing clad material | |
| US20070212565A1 (en) | Joined Body of Dissimilar Materials Comprising Steel Material and Aluminum Material, and Joining Method Therefor | |
| US10454089B2 (en) | Clad material for battery negative electrode lead material, method of manufacturing clad material for battery negative electrode lead material and battery | |
| TWI465592B (en) | A Ni-plated metal plate, a welded structure, and a method for manufacturing a battery material | |
| CN111434443B (en) | Method and device for manufacturing automobile structural part | |
| US20220069498A1 (en) | Connector terminal material and terminal for connector | |
| US3872577A (en) | Method of manufacture of a conductor rail | |
| CN118099554A (en) | Nickel-plated steel, manufacturing method thereof, and battery shell | |
| US11413706B2 (en) | Method for stack-welding dissimilar metal members | |
| JPH0793128B2 (en) | Sealed battery | |
| JP2963318B2 (en) | Surface treated steel sheet for battery case and battery case | |
| JPH0810586B2 (en) | Sealed battery | |
| TWI460905B (en) | Copper alloy strips for charging the battery marking material | |
| JPH0812774B2 (en) | Method for manufacturing sealed battery | |
| JPH08218137A (en) | Copper or copper alloy member excellent in laser weldability | |
| JPH0794153A (en) | Method of manufacturing alkaline battery and negative electrode container | |
| CA2233532A1 (en) | Battery can-forming plate and method of manufacturing the plate | |
| KR101997428B1 (en) | A foil for a negative electrode collector of a secondary battery and a manufacturing method thereof | |
| TWI788080B (en) | Hot forming steel sheet with hardened aluminum-based plating and method for producing the same | |
| JPH1092395A (en) | Battery can forming material and method of manufacturing the same | |
| JPH06108286A (en) | High workability nickel-tin plated steel strip | |
| US11441039B2 (en) | High temperature coatings to mitigate weld cracking in resistance welding | |
| JP2784746B2 (en) | Battery case | |
| JPH03197693A (en) | Ultra-thin Sn-plated steel sheet for cans and its manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071009 Year of fee payment: 12 |