JP2000285874A - Battery can and manufacture thereof - Google Patents
Battery can and manufacture thereofInfo
- Publication number
- JP2000285874A JP2000285874A JP11090569A JP9056999A JP2000285874A JP 2000285874 A JP2000285874 A JP 2000285874A JP 11090569 A JP11090569 A JP 11090569A JP 9056999 A JP9056999 A JP 9056999A JP 2000285874 A JP2000285874 A JP 2000285874A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- stainless steel
- plating layer
- ferritic stainless
- steel sheet
- 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
Classifications
-
- 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
【０００１】[0001]
【産業上の利用分野】本発明は、接触抵抗が低く耐食
性，耐久性に優れた電池缶及び電池缶を高生産性で製造
する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery can having low contact resistance and excellent corrosion resistance and durability, and a method for producing a battery can with high productivity.
【０００２】[0002]
【従来の技術】アルカリマンガン電池，ニッケル・カド
ウミウム電池，リチウム電池等の電池缶には、亜鉛缶，
鉄缶等が使用されている。たとえば、通常のマンガン乾
電池では、負極活物質を兼ねる端子容器として素材のも
つ加工容易性から亜鉛缶が使用されており、主としてイ
ンパクト成形によって製造されている。アルカリマンガ
ン電池では、正極，負極，電解液等を充填する端子兼容
器として鉄缶が使用されており、主としてトランスファ
絞りによって製造されている。2. Description of the Related Art Alkaline manganese batteries, nickel-cadmium batteries, lithium batteries, and other battery cans have zinc cans,
Iron cans and the like are used. For example, in a normal manganese dry battery, a zinc can is used as a terminal container also serving as a negative electrode active material because of the easiness of processing of the material, and is mainly manufactured by impact molding. In an alkaline manganese battery, an iron can is used as a terminal / container for filling a positive electrode, a negative electrode, an electrolytic solution, and the like, and is mainly manufactured by transfer drawing.
【０００３】[0003]
【発明が解決しようとする課題】電池の性能を上げるた
め、腐食性の強い電解液を電池に充填する傾向が強くな
ってきている。電解液の強酸性化又は強アルカリ化に伴
い、電池缶に使用される素材としても耐食性に優れた材
料が要求されているが、通常の鋼板を前提にするとき耐
食性の改善には限度があり、電池使用中に錆が表面側ま
で達することもある。耐食性に優れたステンレス鋼を電
池缶用素材として使用すると、電池缶の腐食抑制が期待
できる。しかし、ステンレス鋼は、表面が不動態皮膜で
覆われているため、そのままで電池缶に使用すると接触
抵抗が高く、電力取出し効率の低い電池になる。しか
も、缶底部に比較して筒部が長い、換言すると深い容器
形状の電池缶を製造するためには、過酷な加工に耐える
材料が要求される。この点、オーステナイト系ステンレ
ス鋼では、硬度が高く加工硬化も大きいため、成形途中
で中間焼鈍が必要とされ、加工後にも焼鈍等の熱処理に
より時期割れを抑制することが必要になる。SUMMARY OF THE INVENTION In order to improve the performance of a battery, there is an increasing tendency to fill the battery with a highly corrosive electrolytic solution. With the strong acidification or strong alkalinization of electrolytes, materials with excellent corrosion resistance are also required as materials used for battery cans, but there is a limit in improving corrosion resistance when assuming ordinary steel sheets. Also, rust may reach the surface side during battery use. When stainless steel having excellent corrosion resistance is used as a material for a battery can, it is expected that the corrosion of the battery can is suppressed. However, since the surface of stainless steel is covered with a passivation film, if it is used as it is in a battery can, it will have a high contact resistance and a low power extraction efficiency. Moreover, in order to manufacture a battery can having a cylindrical portion that is longer than the bottom of the can, in other words, a deep container, a material that can withstand severe processing is required. In this regard, since austenitic stainless steel has high hardness and large work hardening, intermediate annealing is required during molding, and it is necessary to suppress time cracking by heat treatment such as annealing even after processing.
【０００４】[0004]
【課題を解決するための手段】本発明は、このような問
題を解消すべく案出されたものであり、少なくとも片面
にＮｉめっきを施したフェライト系ステンレス鋼板を素
材として連続扱き加工で電池缶に成形することにより、
接触抵抗が低く、耐食性に優れた電池缶を提供すること
を目的とする。本発明の電池缶は、その目的を達成する
ため、少なくとも片面にＮｉめっきが施されたフェライ
ト系ステンレス鋼板を素材とし、缶底部に比較して筒部
が長い缶形状に連続扱き加工で成形され、缶底部のＮｉ
めっき層が筒部外面のＮｉめっき層よりも厚い電池缶本
体をもつことを特徴とする。この電池缶は、少なくとも
片面にＮｉめっきが施されたフェライト系ステンレス鋼
板をＮｉめっき層を外側にして有底筒状に絞り加工し、
扱き径が順次小さくなる複数の扱きダイスを多段に配置
した扱き装置に送り、缶底部に比較して筒部が長い電池
缶本体形状に連続扱き加工することにより製造される。
Ｎｉめっきは、フェライト系ステンレス鋼板の片面又は
両面に施すことができるが、扱き加工時における潤滑作
用を確保する上で有底筒状の外側にＮｉめっき層がある
ことが重要である。DISCLOSURE OF THE INVENTION The present invention has been devised to solve such a problem, and a battery can is continuously worked by using a ferritic stainless steel sheet having at least one surface plated with Ni as a material. By molding into
An object is to provide a battery can having low contact resistance and excellent corrosion resistance. In order to achieve the object, the battery can of the present invention is made of a ferritic stainless steel sheet having at least one surface plated with Ni, and is formed by continuous handling in a can shape in which the cylindrical portion is longer than the bottom of the can. , Ni at the bottom of the can
It is characterized in that the plating layer has a battery can body that is thicker than the Ni plating layer on the outer surface of the cylindrical portion. This battery can is formed by drawing a ferritic stainless steel sheet having Ni plating on at least one side into a bottomed cylindrical shape with the Ni plating layer on the outside,
It is manufactured by sending a plurality of handling dies, whose handling diameters are gradually reduced, to a handling device in which multiple stages are arranged, and successively working into a battery can body shape having a cylindrical portion longer than the can bottom.
Ni plating can be applied to one side or both sides of a ferritic stainless steel plate, but it is important that the Ni plating layer is provided outside the bottomed cylindrical shape in order to secure a lubricating action during handling.
【０００５】[0005]
【実施の形態】単３電池，単４電池等の電池缶は、缶底
部に比較して筒部の長い、換言すると深さのある容器形
状をもっている。本発明では、深い容器形状の電池缶用
の素材として、少なくとも片面にＮｉめっきが施された
フェライト系ステンレス鋼板を使用する。この電池缶
は、図１に示すように、フェライト系ステンレス鋼Ｓを
内側に、Ｎｉめっき層Ｐを外側に配置している。フェラ
イト系ステンレス鋼Ｓとしては、代表的な鋼種にＳＵＳ
４３０がある。フェライト系ステンレス鋼Ｓを缶内側に
位置させているので、腐食性の強い電解液に対しても十
分な耐食性を呈し、従来の鉄缶に発生しがちであった腐
食，錆等が抑制される。また、フェライト系ステンレス
鋼Ｓは、多段絞り加工の途中で中間焼鈍，最終焼鈍等が
必要なオーステナイト系ステンレス鋼と比較し、工程数
の少ないＤＩ（DRAWING & IRONING)プロセスで電池缶に
製造できる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Battery cans, such as AA batteries and AAA batteries, have a container shape having a tube portion longer than the bottom of the can, in other words, having a depth. In the present invention, a ferritic stainless steel sheet having at least one surface plated with Ni is used as a material for a battery case having a deep container shape. As shown in FIG. 1, the battery can has a ferritic stainless steel S inside and a Ni plating layer P outside. Typical ferritic stainless steel S is SUS
430. Since the ferritic stainless steel S is located inside the can, it exhibits sufficient corrosion resistance to highly corrosive electrolytes, and suppresses corrosion, rust, etc., which tend to occur in conventional iron cans. . Further, the ferritic stainless steel S can be manufactured into a battery can by a DI (DRAWING & IRONING) process, which requires a smaller number of steps, as compared with an austenitic stainless steel that requires intermediate annealing, final annealing, and the like during multi-stage drawing.
【０００６】フェライト系ステンレス鋼板としては、深
い容器形状の電池缶に成形することから、異方性の小さ
な材料を使用する。具体的には、ＪＩＳ １３Ｂ号引張
り試験片を用いて測定したランクフォード値（Δｒ）が
０．２以下の鋼板が好ましい。異方性の小さなフェライ
ト系ステンレス鋼板は、熱延→ベル焼鈍→デスケーリン
グ→中間圧延→中間焼鈍→仕上げ圧延→仕上げ焼鈍→調
質圧延→テンションレベラーの工程を経て製造される。
なかでも、仕上げ圧延時に圧下率を８０％以上又は３０
〜３５％の範囲に調整すると、Ｌ方向，Ｃ方向，４５度
方向共に同等な伸び特性を示す鋼板が得られる。As the ferritic stainless steel sheet, a material with small anisotropy is used because it is formed into a battery can having a deep container shape. Specifically, a steel sheet having a Rankford value (Δr) of 0.2 or less measured using a JIS No. 13B tensile test piece is preferable. A ferritic stainless steel sheet having small anisotropy is manufactured through a process of hot rolling → bell annealing → descaling → intermediate rolling → intermediate annealing → finish rolling → finish annealing → temper rolling → tension leveler.
Above all, at the time of finish rolling, the rolling reduction is 80% or more or 30%.
When adjusted to a range of ~ 35%, a steel sheet exhibiting the same elongation characteristics in the L direction, the C direction, and the 45 degree direction can be obtained.
【０００７】Ｎｉめっき層Ｐは、表面調整されたフェラ
イト系ステンレス鋼に電気めっきされる。Ｎｉめっき層
Ｐの厚さは、連続扱き加工された段階の筒部１で０．８
〜２．４μｍが好ましく、１．２〜１．８μｍとなるよ
うに調整することが最も好ましい。缶底部２では２．０
〜４．０μｍが好ましく、３．０〜３．１μｍとなるよ
うに調整することが最も好ましい。Ｎｉめっき層Ｐの厚
さは、電気めっき時の通電量によって容易に調節され
る。電気Ｎｉめっきには、たとえば硫酸ニッケルを主成
分とするワット浴，スルファミン酸浴，塩化物浴，全硫
酸塩浴，ホウフッ化浴等がめっき浴として使用される。
代表的なワット浴は、硫酸ニッケル２５０〜３５０ｇ／
ｌ，塩化ニッケル３０〜５０ｇ／ｌ，ホウ酸３０〜５０
ｇ／ｌの浴組成をもつ。ｐＨ３．５〜４．５，浴温度５
０〜６０℃に調整されためっき浴にフェライト系ステン
レス鋼を浸漬し、電流密度５〜３０Ａ／ｄｍ2 で電気め
っきすると無光沢Ｎｉめっきが得られる。Ｎｉめっき層
に光沢が要求される場合、無光沢めっき後にバフ研磨等
で光沢を付与することが好ましい。また、後工程として
Ｎｉブライトめっきを施すことによっても、光沢のある
Ｎｉめっき層Ｐが形成される。電気めっきで形成された
Ｎｉめっき層Ｐは比較的多孔質であるが、下地がフェラ
イト系ステンレス鋼Ｓのため、電池缶に必要な耐食性，
耐久性に悪影響を与えることはない。The Ni plating layer P is electroplated on a surface-conditioned ferritic stainless steel. The thickness of the Ni plating layer P is 0.8
To 2.4 μm is preferable, and it is most preferable to adjust the thickness to 1.2 to 1.8 μm. 2.0 at can bottom 2
To 4.0 μm is preferred, and most preferably adjusted to be 3.0 to 3.1 μm. The thickness of the Ni plating layer P can be easily adjusted by the amount of electricity during electroplating. For the electric Ni plating, for example, a Watt bath containing nickel sulfate as a main component, a sulfamic acid bath, a chloride bath, a total sulfate bath, a borofluoride bath, or the like is used as a plating bath.
A typical Watt bath is 250-350 g of nickel sulfate /
1, nickel chloride 30-50 g / l, boric acid 30-50
g / l bath composition. pH 3.5-4.5, bath temperature 5
When ferritic stainless steel is immersed in a plating bath adjusted to 0 to 60 ° C. and electroplated at a current density of 5 to 30 A / dm 2 , matte Ni plating is obtained. When gloss is required for the Ni plating layer, it is preferable to impart gloss by buffing or the like after matte plating. Also, a bright Ni plating layer P is formed by performing Ni bright plating as a subsequent step. Although the Ni plating layer P formed by electroplating is relatively porous, since the base is ferritic stainless steel S, the corrosion resistance required for the battery can is improved.
It does not adversely affect durability.
【０００８】筒部１のＮｉめっき層Ｐは、連続扱き加工
で素材鋼板を成形するときに潤滑剤として作用し、扱き
ダイスと素材鋼板との焼付きやカジリを防止する。電池
缶形状に素材鋼板が成形された段階では、電気めっき当
初の厚みよりも薄くなっている。薄いＮｉめっき層Ｐ
は、素材の加工変形に追従して延ばされるが、素地との
密着性に優れているため、加工後にも良好な耐食性，耐
久性を呈する。電池製造工程では、成形缶に電解液を充
填した後、缶内部に空気が含まれないように密封する
が、密封時に電解液が缶外部に流出し易い。そのため、
缶外部の耐食性が特に重要であり、薄いＮｉめっき層Ｐ
は、腐食性のある電解液に曝されても十分な耐食性を示
す。他方、缶底部２のＮｉめっき層Ｐは、陽極側端子面
を構成することから２．０〜４．０μｍと比較的厚く維
持されている。Ｎｉめっき層Ｐは、下地のフェライト系
ステンレス鋼Ｓと異なり、表面に形成される酸化皮膜が
極薄いため、低い接触抵抗を呈する面を提供する。ま
た、電池缶内面にＮｉめっき層を形成すると、電気抵抗
が低下するのでより好ましい。[0008] The Ni plating layer P of the cylindrical portion 1 acts as a lubricant when forming a material steel plate by continuous handling, and prevents seizure and galling between the handling die and the material steel plate. At the stage when the material steel sheet is formed into a battery can shape, the thickness is smaller than the initial thickness of the electroplating. Thin Ni plating layer P
Is stretched following the deformation of the material, but exhibits excellent corrosion resistance and durability even after processing because of its excellent adhesion to the substrate. In the battery manufacturing process, after filling the molded can with the electrolytic solution, the can is sealed so that air is not contained inside the can. However, the electrolytic solution easily flows out of the can at the time of sealing. for that reason,
The corrosion resistance of the outside of the can is particularly important, and the thin Ni plating layer P
Exhibits sufficient corrosion resistance even when exposed to a corrosive electrolytic solution. On the other hand, the Ni plating layer P of the can bottom 2 is maintained relatively thick at 2.0 to 4.0 μm because it constitutes the anode-side terminal surface. Unlike the base ferritic stainless steel S, the Ni plating layer P has a very thin oxide film formed on the surface, and therefore provides a surface exhibiting low contact resistance. Further, it is more preferable to form a Ni plating layer on the inner surface of the battery can because the electric resistance decreases.
【０００９】たとえば、単３電池では、筒部１の長さＬ
と缶底部２の径Ｒとの比Ｌ／Ｒが５５〜１３．８であ
る。大きな比Ｌ／Ｒの電池缶を製造する方法として、本
発明者等は、絞り加工及び扱き加工を組み合わせたＤＩ
（DRAWING ＆ IRONING）プロセスを採用した。ＤＩプロ
セスによる電池缶の製造自体は特許第２６１５５２９号
で紹介したところであるが、本発明では、素材として使
用するＮｉめっきフェライト系ステンレス鋼板の長所と
ＤＩプロセスの長所を組み合わせることにより、腐食性
の強い電解液が使用されるようになってきている電池缶
で要求される耐食性，耐久性，低接触抵抗等が全て解決
される。ＤＩプロセスでは、素材鋼板を打抜くと同時に
に示す有底筒体Ｍ1 （図２ａ）に絞り加工する。扱き径
が順次小さくなった複数の扱きダイス３1 〜３4 を多段
配置した連続扱き装置に有底筒体Ｍ1 をセットし（図２
ｂ）、有底筒体Ｍ1 を扱きダイス３1 〜３4 に押し込
む。有底筒体Ｍ1 は、扱きダイス３1 〜３4 とポンチ４
との間で伸ばされ、最終段の扱きダイス３4 及びポンチ
４で径が規制された展延筒体Ｍ2 になる。このとき、扱
きダイス３1 〜３4 に接する面に潤滑剤として働くＮｉ
めっき層Ｐがあるため、焼付き，カジリ等の欠陥発生が
なく目標形状の展延筒体Ｍ2 に成形される。For example, in an AA battery, the length L
And the ratio L / R of the diameter R of the can bottom 2 to 55-13.8. As a method of manufacturing a battery can having a large ratio L / R, the present inventors have developed a DI that combines drawing and handling.
(DRAWING & IRONING) process was adopted. Although the manufacture of the battery can by the DI process itself has just been introduced in Japanese Patent No. 2615529, the present invention combines the advantages of the Ni-plated ferritic stainless steel sheet used as the material with the advantages of the DI process to provide highly corrosive. This solves all of the corrosion resistance, durability, low contact resistance, etc. required for battery cans in which electrolytes are being used. In the DI process, a blank steel tube M 1 (FIG. 2a) shown at the same time as the blank is punched out of a material steel plate. A plurality of ironing dies 3 1 to 3 4 to squeezing diameter becomes successively smaller sets bottomed tubular body M 1 in a continuous squeezing device which multi-tiered (FIG. 2
b), push the bottomed tubular body M 1 ironing the die 3 1 to 3 4. It bottomed tubular body M 1 is ironing die 3 1 to 3 4 and the punch 4
Stretched between the diameter at the ironing die 3 4 and punch 4 of the final stage is spreading cylinder M 2 which is restricted. At this time, Ni acting as a lubricant to a surface in contact with the ironing die 3 1 to 3 4
Since there is a plating layer P, seizure, it is molded into spreading cylinder M 2 of the target shape without defects such as galling.
【００１０】展延筒体Ｍ2 は、有底筒体Ｍ1 に比較する
と筒部１が薄く長くなっているが、缶底部２の厚みはほ
とんど変わっていない。そのため、筒部１のＮｉめっき
層Ｐは当初のめっき厚みよりも大幅に薄くなっている
が、缶底部２のＮｉめっき層Ｐは当初のめっき厚みより
若干薄くなった程度である。比較的厚い缶底部２のＮｉ
めっき層Ｐは、陽極側端子面として使用される缶底部２
の接触抵抗を低下させる。薄肉化した筒部１のＮｉめっ
き層Ｐは、素地の加工変形に追従して延ばされるが、素
地との密着性に優れているため加工後においても優れた
耐食性，耐久性を呈する。[0010] spreading cylinder M 2 is the cylindrical portion 1 when compared to the bottomed tubular body M 1 is thin long, the thickness of the can bottom 2 has not changed much. Therefore, the Ni plating layer P of the cylindrical portion 1 is much thinner than the initial plating thickness, but the Ni plating layer P of the can bottom portion 2 is slightly thinner than the initial plating thickness. Ni with relatively thick can bottom 2
The plating layer P is formed on the bottom 2 of the can used as the anode-side terminal surface.
Reduce the contact resistance. The Ni plating layer P of the thinned cylindrical portion 1 is extended following the deformation of the substrate, but exhibits excellent corrosion resistance and durability even after the processing because of its excellent adhesion to the substrate.
【００１１】連続扱き加工で有底筒体Ｍ1 を展延筒体Ｍ
2 に成形するとき、加工硬化の少ないフェライト系ステ
ンレス鋼Ｓを素材とし、しかも潤滑剤として働くＮｉめ
っき層Ｐを形成しているため、材料破断を生じることな
く成形される。特に、ランクフォード値（Δｒ）が０．
２以下の異方性の小さなフェライト系ステンレス鋼板を
使用する場合、耳割れ等の欠陥が発生することなく展延
筒体Ｍ2 が製造される。連続扱き加工された展延筒体Ｍ
2 は、不揃いの耳部Ｅをもっている（図２ｄ）。そこ
で、耳部Ｅを切り落とし、電池缶本体Ｍ3 が得られる
（図２ｅ）。電池缶本体Ｍ3 に正極，負極，電解液等を
充填した後、電池缶本体Ｍ3 に蓋Ｃを取り付けて電池Ｍ
4 が組み立てられる（図２ｆ）。The bottomed cylindrical body M 1 is extended into the extended cylindrical body M by continuous handling.
When forming into 2 , the ferrite-based stainless steel S, which has less work hardening, is used as a material, and the Ni plating layer P serving as a lubricant is formed. In particular, the Rankford value (Δr) is 0.
When using small ferritic stainless steel sheet 2 following anisotropic, spreading cylinder M 2 without defects edge cracking or the like occurs is manufactured. Rolled cylindrical body M processed continuously
2 have irregular ears E (FIG. 2d). Therefore, cut off ears E, the battery can body M 3 obtained (FIG. 2e). The positive electrode in the battery can body M 3, a negative electrode, after filling the electrolyte solution or the like, the battery is attached to the lid C the battery can body M 3 M
4 is assembled (FIG. 2f).
【００１２】[0012]
【実施例】厚み３．１μｍのＮｉめっき層Ｐを片面に形
成した板厚０．９ｍｍのＳＵＳ４３０フェライト系ステ
ンレス鋼板を素材として使用した。このフェライト系ス
テンレス鋼板は、冷間圧延時の圧下率を８３％に調節す
ることにより、異方性を小さくした鋼板である。素材鋼
板を抜き・絞り加工して外径１３．８ｍｍ，高さ５５ｍ
ｍの有底筒体Ｍ 1 を得た。有底筒体Ｍ1 を連続扱き加工
装置にセットし、４段構成の扱きダイス３1 〜３4 及び
ポンチ４により高さ５５ｍｍの筒部１及び径１３．８ｍ
ｍの缶底部２をもつ展延筒体Ｍ2 に扱き加工した。展延
筒体Ｍ2 には高低差０．６ｍｍの範囲に収まる耳部Ｅが
形成されていたが、材料破断，耳割れ等の欠陥は検出さ
れなかった。展延筒体Ｍ2 の断面を観察してＮｉめっき
層Ｐの厚みを調査したところ、筒部１では１．３６〜
１．６７μｍ，缶底部２では３．０〜３．７μｍであっ
た。EXAMPLE A Ni plating layer P having a thickness of 3.1 μm was formed on one side.
SUS430 ferrite-based stainless steel sheet with 0.9mm thickness
Stainless steel plate was used as the material. This ferrite series
For the stainless steel sheet, adjust the rolling reduction during cold rolling to 83%.
Thus, the steel sheet has reduced anisotropy. Material steel
The plate is punched out and drawn to an outer diameter of 13.8mm and a height of 55m
m bottomed cylinder M 1 I got Bottomed cylinder M1 Continuous processing
Set in a device, handling dies 3 in a 4-stage configuration1 ~ 3Four as well as
The cylinder part 1 having a height of 55 mm by the punch 4 and a diameter of 13.8 m.
Rolled cylindrical body M with can bottom 2 mTwo And processed. Extension
Cylindrical body MTwo Has ears E that fall within the range of 0.6 mm
Defects such as material breakage and ear cracks were detected.
Was not. Spread cylinder MTwo Observe the cross section of the Ni plating
When the thickness of the layer P was investigated, it was 1.36 to
1.67 μm, and 3.0 to 3.7 μm at the bottom 2 of the can.
Was.
【００１３】耳部Ｅを切り落として電池缶本体Ｍ3 と
し、正極，負極，電解液等を充填した後、電池缶本体Ｍ
3 に蓋Ｃを取り付けて電池Ｍ4 を組み立てた。缶底部２
の接触抵抗を測定したところ、１．５ｍΩと低い値を示
し、熱損失の少ない陰極側端子面として使用できること
が判った。また、長期間放置した後で電池Ｍ4 を分解し
て電池缶本体Ｍ3 の内面を観察したところ、腐食がほと
んど検出されず、良好な耐食性を呈していた。比較のた
め、Ｎｉめっき層Ｐを設けない以外は同じフェライト系
ステンレス鋼板を素材として連続扱き加工した。しか
し、扱きダイス３1 〜３4 によるカジリが多発し、材料
破断，耳割れ等に起因して目標とする展延筒体Ｍ2 が得
られなかった。展延筒体Ｍ2 の耳部Ｅは、厚いＮｉめっ
き層Ｐを形成するほど小さくなり、３μｍ以上の厚みで
Ｎｉめっき層Ｐを形成したフェライト系ステンレス鋼板
を素材に使用したものでは耳部Ｅの高低差が僅か０．６
ｍｍ以下に抑えられていた。そのため、展延筒体Ｍ2 か
ら歩留良く電池缶本体Ｍ3 を製造できた。The ear E is cut off to form the battery can body M 3, and after filling the positive electrode, the negative electrode, the electrolyte, etc., the battery can body M 3
The cover C was attached to 3 to assemble the battery M4. Can bottom 2
When the contact resistance was measured, it showed a low value of 1.5 mΩ, indicating that it could be used as a cathode terminal surface with little heat loss. The observation of the decomposition to the inner surface of the battery can body M 3 batteries M 4 after a long period of standing, corrosion hardly detected, had exhibited good corrosion resistance. For comparison, the same ferritic stainless steel sheet was used as a raw material except that the Ni plating layer P was not provided, and processed continuously. However, frequently the galling by ironing die 3 1 to 3 4, material breakage, the spreading cylinder M 2 to the target due to edge cracking and the like was obtained. Ears E of the spreading cylinder M 2 is thick enough to form a Ni plating layer P becomes small, the ear portion E is obtained by using ferritic stainless steel sheet to form a Ni plating layer P in the material at 3μm thickness of at least Height difference of only 0.6
mm or less. Therefore, it could be produced to yield good battery can body M 3 from spreading cylinder M 2.
【００１４】[0014]
【発明の効果】以上に説明したように、本発明の電池缶
は、少なくとも片面にＮｉめっき層が形成されたフェラ
イト系ステンレス鋼を素材とし、連続扱き加工で成形さ
れた電池缶本体を使用しているので、腐食性の強い電解
液に対しても優れた耐食性，耐久性を示し、低い接触抵
抗の陽極端子面をもつ電池が得られる。しかも、絞り加
工と連続扱き加工との組合せにより、生産性良く電池缶
が製造される。As described above, the battery can of the present invention uses a battery can body made of ferritic stainless steel having a Ni plating layer formed on at least one side and formed by continuous handling. Therefore, a battery having excellent corrosion resistance and durability even with a highly corrosive electrolytic solution and having an anode terminal surface with low contact resistance can be obtained. In addition, the battery can is manufactured with high productivity by the combination of the drawing process and the continuous handling process.
【図１】 本発明に従った電池缶の一部断面図FIG. 1 is a partial cross-sectional view of a battery can according to the present invention.
【図２】 本発明に従った電池缶の製造工程図FIG. 2 is a manufacturing process diagram of a battery can according to the present invention.
Ｓ：フェライト系ステンレス鋼 Ｐ：Ｎｉめっき層
Ｍ1 ：有底筒体 Ｍ 2 ：展延筒体 Ｍ3 ：電池缶
本体 Ｍ4 ：電池 耳部Ｅ： Ｃ：蓋 １：筒部 ２：缶底部 ３1 〜３4 ：扱きダイス
４：ポンチ S: Ferritic stainless steel P: Ni plating layer
M1 ： Bottomed cylinder M Two ： Expandable cylinder MThree : Battery can
Body MFour : Battery Ear E: C: Lid 1: Tube part 2: Can bottom part 31 ~ 3Four ： Handling dies
4: punch
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森 克彦 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 松根 壽 東京都千代田区丸の内３丁目４番１号 日 新製鋼株式会社内 (72)発明者 多々納 政義 大阪府堺市石津西町５番地 日新製鋼株式 会社技術研究所内 (72)発明者 渡辺 栄次 大阪府堺市石津西町５番地 日新製鋼株式 会社技術研究所内 Ｆターム(参考） 5H011 AA02 AA09 CC06 DD05 DD26 KK01 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Katsuhiko Mori 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Toshi Matsune 3-4-1 Marunouchi, Chiyoda-ku, Tokyo Nisshin Steel Co., Ltd. Within the company (72) Inventor Masayoshi Tatana 5th Ishizu Nishimachi, Sakai City, Osaka Nisshin Steel Co., Ltd. Inside the Technical Research Institute (72) Inventor Eiji Watanabe 5th Ishizu Nishimachi, Sakai City, Osaka Nisshin Steel Co., Ltd. (Reference) 5H011 AA02 AA09 CC06 DD05 DD26 KK01
Claims (2)
フェライト系ステンレス鋼板を素材とし、缶底部に比較
して筒部が長い缶形状に連続扱き加工で成形され、缶底
部のＮｉめっき層が筒部外面のＮｉめっき層よりも厚い
電池缶本体をもつ電池缶。1. A ferritic stainless steel sheet having at least one surface plated with Ni, formed by continuous working in a can shape in which a cylindrical portion is longer than a can bottom, and a Ni plating layer on the can bottom is formed by a cylinder. A battery can having a battery can body that is thicker than the Ni plating layer on the outer surface.
フェライト系ステンレス鋼板をＮｉめっき層を外側にし
て有底筒状に絞り加工し、扱き径が順次小さくなる複数
の扱きダイスを多段に配置した扱き装置に送り、缶底部
に比較して筒部が長い電池缶本体形状に連続扱き加工す
ることを特徴とする電池缶の製造方法。2. A ferritic stainless steel sheet on which at least one surface is Ni-plated is drawn into a bottomed cylindrical shape with the Ni plating layer on the outside, and a plurality of handling dies whose handling diameters are sequentially reduced are arranged in multiple stages. A method for producing a battery can, characterized in that the battery can is sent to a handling device and is continuously handled in a battery can body shape having a cylindrical portion longer than a bottom portion of the can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11090569A JP2000285874A (en) | 1999-03-31 | 1999-03-31 | Battery can and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11090569A JP2000285874A (en) | 1999-03-31 | 1999-03-31 | Battery can and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000285874A true JP2000285874A (en) | 2000-10-13 |
| JP2000285874A5 JP2000285874A5 (en) | 2005-08-04 |
Family
ID=14002070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11090569A Pending JP2000285874A (en) | 1999-03-31 | 1999-03-31 | Battery can and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000285874A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009019841A1 (en) * | 2007-08-03 | 2009-02-12 | Panasonic Corporation | Battery can, and method and device for producing the battery can |
| JP2009183972A (en) * | 2008-02-05 | 2009-08-20 | Daikin Ind Ltd | Piping member and method of manufacturing piping member |
| KR20190098633A (en) | 2018-02-14 | 2019-08-22 | 주식회사 엘지화학 | Stainless Steel Cylindrical Battery Case Having Non-uniform Thickness |
-
1999
- 1999-03-31 JP JP11090569A patent/JP2000285874A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009019841A1 (en) * | 2007-08-03 | 2009-02-12 | Panasonic Corporation | Battery can, and method and device for producing the battery can |
| JP2009037979A (en) * | 2007-08-03 | 2009-02-19 | Panasonic Corp | Battery can, its manufacturing method, and manufacturing apparatus |
| JP2009183972A (en) * | 2008-02-05 | 2009-08-20 | Daikin Ind Ltd | Piping member and method of manufacturing piping member |
| KR20190098633A (en) | 2018-02-14 | 2019-08-22 | 주식회사 엘지화학 | Stainless Steel Cylindrical Battery Case Having Non-uniform Thickness |
| KR102487834B1 (en) * | 2018-02-14 | 2023-01-12 | 주식회사 엘지에너지솔루션 | Stainless Steel Cylindrical Battery Case Having Non-uniform Thickness |
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