JP3247570B2 - Battery can manufacturing method - Google Patents
Battery can manufacturing methodInfo
- Publication number
- JP3247570B2 JP3247570B2 JP05857995A JP5857995A JP3247570B2 JP 3247570 B2 JP3247570 B2 JP 3247570B2 JP 05857995 A JP05857995 A JP 05857995A JP 5857995 A JP5857995 A JP 5857995A JP 3247570 B2 JP3247570 B2 JP 3247570B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- hardness
- intermediate product
- squeezing
- cup
- 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 - Fee Related
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
Description
【０００１】[0001]
【産業上の利用分野】本発明は一次電池や二次電池のケ
ース缶となる電池缶の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a battery can used as a case can for a primary battery or a secondary battery.
【０００２】[0002]
【従来の技術】電池缶の製造方法として、電池缶素材か
ら深絞り工程でカップ状中間製品を製作し、その後シゴ
キ工程で前記カップ状中間製品の側周部を展延させて所
定形状の電池缶を製作する方法が知られている（特開平
５−８９８６１号公報参照。）。2. Description of the Related Art As a method of manufacturing a battery can, a cup-shaped intermediate product is manufactured from a battery can material in a deep drawing process, and then a side peripheral portion of the cup-shaped intermediate product is extended in a squeezing process to form a battery having a predetermined shape. A method for manufacturing a can is known (see Japanese Patent Application Laid-Open No. 5-88961).
【０００３】そして従来は、上記製造方法において、電
池缶の耐圧強度や封口部の強度を確保するため、電池缶
素材として比較的高硬度のニッケルメッキ鋼板（通常ヴ
ィカース硬度ＨＶが１００〜１２０のもの）が用いられ
ていた。Conventionally, in the above manufacturing method, a relatively high hardness nickel-plated steel plate (usually having a Vickers hardness HV of 100 to 120) is used as a battery can material in order to secure the pressure resistance of the battery can and the strength of the sealing portion. ) Was used.
【０００４】[0004]
【発明が解決しようとする課題】ところが例えばＡＡＡ
サイズのニカド電池に用いられる電池缶のように、径に
比較して総高（胴長の全長さ）が極めて大きい電池缶、
例えば総高／外径が３．５以上の電池缶を製造する際
に、深絞り工程においても、径に比較して総高の比が大
のカップ状中間製品を製作する必要があるが、従来の方
法においては、このようなカップ状中間製品を製作する
過程で割れなどが生じ、不良品の発生率が大きくなると
いう問題があった。However, for example, AAA
Battery cans whose total height (total length of the body length) is extremely large compared to the diameter, such as battery cans used for Ni-Cd batteries of a size,
For example, when manufacturing a battery can having a total height / outer diameter of 3.5 or more, it is necessary to produce a cup-shaped intermediate product having a large ratio of the total height as compared with the diameter even in the deep drawing process. The conventional method has a problem that cracks and the like occur during the process of manufacturing such a cup-shaped intermediate product, and the incidence of defective products increases.
【０００５】[0005]
【課題を解決するための手段】本発明は上記従来例にお
ける問題点を解消するため、ニッケルメッキ鋼板を電池
缶素材として用い、この電池缶素材から深絞り工程でカ
ップ状中間製品を製作し、その後シゴキ工程で前記カッ
プ状中間製品の側周部を展延させて所定形状の電池缶を
製作する電池缶の製造方法において、電池缶素材として
硬度がＨＶ８０〜９０のものを用い、シゴキ工程によっ
て電池缶の側周部の硬度がＨＶ２００以上となるように
シゴキ加工を施すことを特徴とする。According to the present invention, in order to solve the above-mentioned problems in the prior art, a nickel-plated steel plate is used as a battery can material, and a cup-shaped intermediate product is manufactured from the battery can material by a deep drawing process. Thereafter, in a method of manufacturing a battery can having a predetermined shape by extending a side peripheral portion of the cup-shaped intermediate product in a squeezing process, a material having a hardness of HV 80 to 90 is used as a battery can material. It is characterized in that a squeezing process is performed so that the hardness of the side peripheral portion of the battery can becomes HV200 or more.
【０００６】特に本発明を総高／外径が３．５以上の電
池缶を製造する方法に適用すると好適である。In particular, it is preferable to apply the present invention to a method for manufacturing a battery can having a total height / outer diameter of 3.5 or more.
【０００７】[0007]
【作用】本発明によれば、加工性の良好なＨＶ８０〜９
０の低硬度の電池缶素材から深絞り工程でカップ状中間
製品を製作するので、径に比較して総高の比が大のカッ
プ状中間製品を製作する場合でも、絞り時の変形が容易
で、深絞り工程時に割れなどが生ずる確率を格段に低下
させ、不良品の発生率を極めて低い値におさえることが
できる。According to the present invention, HV80-9 having good processability is used.
Since the cup-shaped intermediate product is manufactured from the low hardness battery can material by a deep drawing process, even when manufacturing a cup-shaped intermediate product whose total height is large compared to the diameter, deformation during drawing is easy. Thus, the probability of occurrence of cracks or the like during the deep drawing step can be significantly reduced, and the occurrence rate of defective products can be suppressed to an extremely low value.
【０００８】又本発明は、シゴキ工程によって電池缶の
側周部の硬度が飛躍的に高められることに着目してなさ
れたものであり、シゴキ率を所定値以上に設定すること
により、電池缶素材の段階ではＨＶ８０〜９０の低硬度
のものであったものを、シゴキ工程完了の段階では電池
缶の側周部の硬度を、加工硬化によりＨＶ２００以上の
高硬度のものとすることができる。従って製作された電
池缶の側周部には十分な耐圧強度が付与されると共に、
封口部の封口強度を十分なものとすることができる。Further, the present invention has been made in view of the fact that the hardness of the side peripheral portion of the battery can is drastically increased by the squeezing step. The material having a low hardness of 80 to 90 HV at the stage of the material can be made to have a high hardness of HV 200 or more by work hardening at the stage of completing the squeezing process. Therefore, a sufficient pressure resistance is given to the side peripheral portion of the manufactured battery can,
The sealing strength of the sealing portion can be made sufficient.
【０００９】[0009]
【実施例】本発明をＡＡＡサイズニカド電池用の電池缶
の製造方法に適用した実施例につき図面を参照しつつ説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a method for manufacturing a battery can for an AAA size nickel-cadmium battery will be described with reference to the drawings.
【００１０】電池缶素材として、厚さ０．２５ｍｍ、硬
度ＨＶ８５のニッケルメッキ鋼板を用いた。この電池缶
素材をフープ材としてプレス機に供給し、プレス機にお
いて周知の深絞り工程で、電池缶素材を所定形状に打抜
き、深絞りを行うことで、図１に示すような外径Ｄ1 が
１６．５ｍｍ、総高Ｌ1 が２０．４４ｍｍのカップ状中
間製品１を得る。この際のカップ状中間製品１の側周部
１ａ及び底部１ｂの肉厚ｐ1 、ｑ1 は前記電池缶素材の
それと基本的に同一で、０．２５ｍｍである。A nickel-plated steel sheet having a thickness of 0.25 mm and a hardness of HV85 was used as a battery can material. This battery can material is supplied as a hoop material to a press machine, and the battery can material is punched into a predetermined shape in a well-known deep drawing process in the press machine and deep-drawn to obtain an outer diameter D 1 as shown in FIG. but 16.5 mm, total height L 1 to obtain a cup-shaped intermediate product 1 of 20.44Mm. At this time, the thicknesses p 1 and q 1 of the side peripheral portion 1 a and the bottom portion 1 b of the cup-shaped intermediate product 1 are basically the same as those of the battery can material, that is, 0.25 mm.
【００１１】次に図２に示す絞り兼シゴキ機を用いてカ
ップ状中間製品１に、１段の絞り加工、及び３段のシゴ
キ加工を一挙に施して、図３に示す電池缶２を製作す
る。この絞り兼シゴキ機は、中間製品搬送部３、パンチ
４、ダイス機構５、ストリッパー６等を備えている。Next, using a drawing and squeezing machine shown in FIG. 2, the cup-shaped intermediate product 1 is subjected to one-stage drawing and three-stage squeezing at once to produce the battery can 2 shown in FIG. I do. The squeezing and squeezing machine includes an intermediate product transport section 3, a punch 4, a die mechanism 5, a stripper 6, and the like.
【００１２】前記中間製品搬送部３は、先ずカップ状中
間製品１を順次成形箇所に搬送する。ダイス機構５に
は、絞りダイス５ａ、第１シゴキダイス５ｂ、第２シゴ
キダイス５ｃ及び第３シゴキダイス５ｄが配設され、こ
れらダイス５ａ〜５ｄはパンチ４の軸心と同心となるよ
うに直列に配されている。成形箇所に搬送され位置決め
された中間製品１ははずみホイールによって駆動される
パンチ４の押動により、絞りダイス５ａによって、その
形状がパンチ４の外形状に沿った形状になるように絞ら
れる。この絞り加工によって、中間製品１は若干小径か
つ胴長に変形されるが、その肉厚等における変化はほと
んどない。The intermediate product conveying section 3 first conveys the cup-shaped intermediate product 1 to a molding portion in order. The die mechanism 5 is provided with a drawing die 5a, a first sword die 5b, a second sword die 5c, and a third sword die 5d. These dies 5a to 5d are arranged in series so as to be concentric with the axis of the punch 4. ing. The intermediate product 1 conveyed and positioned at the forming location is pressed by the punch 4 driven by the flywheel so as to be drawn down by the drawing die 5a so as to have a shape conforming to the outer shape of the punch 4. By this drawing, the intermediate product 1 is slightly deformed to have a small diameter and a body length, but there is almost no change in the thickness and the like.
【００１３】パンチ４の押動が進むと、中間製品１は、
第１シゴキダイス５ｂによって、第１段のシゴキ加工が
施される。この第１段のシゴキ加工により、中間製品１
の側周部１ａは展延され、その肉厚が小となると共に硬
度が高められる。更にパンチ４の押動が進むと、中間製
品１は、第１シゴキダイス５ｂより内径が小の第２シゴ
キダイス５ｃ、次いで第２シゴキダイス５ｃより内径が
小の第３シゴキダイス５ｄによって、第２段及び第３段
のシゴキ加工が順次施され、その側周部１ａは順次展延
され、更に肉厚が小となると共に硬度が高められる。When the pressing movement of the punch 4 proceeds, the intermediate product 1
The first squeezing process is performed by the first sword die 5b. By this first stage sword processing, the intermediate product 1
The side peripheral portion 1a is extended, its thickness is reduced, and its hardness is increased. When the pressing movement of the punch 4 further proceeds, the intermediate product 1 is moved to the second stage and the second stage by the second sword die 5c having an inner diameter smaller than the first sword die 5b, and then by the third sword die 5d having an inner diameter smaller than the second sword die 5c. Three-stage squeezing is sequentially performed, and the side peripheral portion 1a is sequentially expanded, so that the wall thickness is reduced and the hardness is increased.
【００１４】シゴキ加工後、ストリッパー６によって絞
り兼シゴキ機から取外された製品は端部を切断されて、
図３に示す電池缶２となる。After squeezing, the product removed from the squeezing and squeezing machine by the stripper 6 is cut at its end,
It becomes the battery can 2 shown in FIG.
【００１５】本実施例では、上記工程で得られた電池缶
２の側周部２ａの肉厚ｐ2 が０．１７ｍｍとなるよう、
シゴキ工程におけるシゴキ率を３２％としている。又上
記電池缶２の外径Ｄ2 は９．９８ｍｍ、総高Ｌ2 は４
３．５０ｍｍ、底部２ｂの肉厚ｑ2 は０．２５ｍｍであ
る。In this embodiment, the thickness p 2 of the side peripheral portion 2a of the battery can 2 obtained in the above process is set to be 0.17 mm.
The squeezing rate in the squeezing process is set to 32%. The outer diameter D 2 of the battery can 2 is 9.98 mm, and the total height L 2 is 4
3.50 mm, the wall thickness q 2 of the bottom portion 2b is 0.25 mm.
【００１６】上記電池缶２の側周部２ａの硬度を測定し
たところ、ＨＶ２０２であった。このように最初ＨＶ８
５であったニッケルメッキ鋼板が、上記のようにシゴキ
率３２％のシゴキ工程を経ることによって、ＨＶ２０２
にまで硬度が高められた。この硬度の向上度は、何段階
のシゴキを施すか、或いはシゴキ率の割合いを各段階の
シゴキにどのように分配するかで、若干の差異が生ずる
が、基本的にはシゴキ率によって左右される。When the hardness of the side peripheral portion 2a of the battery can 2 was measured, it was HV202. Thus, first HV8
The nickel-plated steel sheet of No. 5 was subjected to the squeezing process with a squeezing rate of 32% as described above, whereby the HV202
The hardness was increased up to. The degree of improvement in hardness may vary slightly depending on the number of stages of swords applied or how the ratio of swords is distributed to the swords of each stage. Is done.
【００１７】上記実施例と同様の電池缶素材から、同様
の工程を経て電池缶２を製造するに際して、シゴキ率を
２５％、３５％、４５％とした際には、次のような硬度
の変化が見られた。When the battery can 2 is manufactured from the same battery can material as in the above-described embodiment through the same process, when the squeeze rate is 25%, 35%, and 45%, the following hardness is obtained. There was a change.
【００１８】 シゴキ率２５％………ＨＶ８５→ＨＶ１９５ シゴキ率３５％………ＨＶ８５→ＨＶ２０５ シゴキ率４５％………ＨＶ８５→ＨＶ２１５ 従って、シゴキ率が所定値以上でなければ、電池缶２の
側周部２ａの硬度をＨＶ２００以上とすることができ
ず、電池缶素材の硬度がＨＶ８５のときはシゴキ率が３
０％程度以上であることが必要である。電池缶素材の硬
度が上記実施例のものより低く、例えばＨＶ８０の場合
には限界シゴキ率が上記実施例のものより高くなければ
ならず、逆に電池缶素材の硬度が上記実施例のものより
高く、例えばＨＶ９０の場合には限界シゴキ率が上記実
施例のものよりも低くてよいことになり、ケースバイケ
ースで最適なシゴキ率を設定する必要がある。Scratch rate 25% HV85 → HV195 Scratch rate 35% HV85 → HV205 Scratch rate 45% HV85 → HV215 Therefore, unless the squeeze rate is equal to or more than a predetermined value, the battery can 2 side. When the hardness of the peripheral portion 2a cannot be HV200 or more and the hardness of the battery can material is HV85, the squeeze rate is 3
It needs to be about 0% or more. The hardness of the battery can material is lower than that of the above-described embodiment. For example, in the case of HV80, the limit squeeze rate must be higher than that of the above-described embodiment. For example, in the case of the HV90, the limit squeeze rate may be lower than that of the above-described embodiment, and it is necessary to set an optimum squeeze rate on a case-by-case basis.
【００１９】ニカド乾電池１０は、図４に示すように構
成されるが、その製造法の概要は以下のとおりである。
すなわち上記電池缶２に正極シート１２、セパレータ１
３、及び負極シート１４を巻回したものを装入し、これ
らを先に装入した負極集電体導出部１５に接触させる。
次いで電解液を注入した後、安全弁１６と一体化したキ
ャップ１７を正極集電体導出部１８に溶接する。その後
キャップ１７等をガスケット１９と共に電池缶２の封口
部２ｄに装入し、この封口部２ｄを変形させることでキ
ャップ１７等を組込む。最後に電池缶２の側周部２ａに
ラベル外装を装着することでニカド乾電池１０が作成さ
れる。これらの具体的工程は周知の工程であるので、そ
の説明を省略する。なお、電池缶２の側周部２ａやその
封口部２ｄの肉厚は、上記実施例ではシゴキ工程によっ
て０．１７ｍｍと薄いものとなっているが、その硬度が
ＨＶ２０２と高硬度となっているため、十分な耐圧強度
や封口強度が得られている。The nickel-cadmium dry battery 10 is configured as shown in FIG. 4, and the outline of the manufacturing method is as follows.
That is, the positive electrode sheet 12 and the separator 1
3 and the wound negative electrode sheet 14 are loaded, and these are brought into contact with the negative electrode current collector lead-out section 15 loaded earlier.
Next, after injecting the electrolytic solution, the cap 17 integrated with the safety valve 16 is welded to the positive electrode current collector lead-out portion 18. Thereafter, the cap 17 and the like are inserted into the sealing portion 2d of the battery can 2 together with the gasket 19, and the cap 17 and the like are assembled by deforming the sealing portion 2d. Finally, a nickel-cadmium dry battery 10 is prepared by attaching a label exterior to the side peripheral portion 2a of the battery can 2. Since these specific steps are well-known steps, their description will be omitted. The thickness of the side peripheral portion 2a of the battery can 2 and the thickness of the sealing portion 2d are as thin as 0.17 mm in the above embodiment by the squeezing process, but the hardness is as high as HV202. Therefore, sufficient pressure resistance and sealing strength are obtained.
【００２０】[0020]
【発明の効果】本発明によれば、カップ状中間製品を製
作する深絞り工程時の不良品の発生率を極力低下させる
ことができると共に、電池缶の耐圧強度や封口強度を十
分に確保することができる電池缶の製造方法を提供する
ことができる。According to the present invention, the occurrence rate of defective products in the deep drawing process for producing a cup-shaped intermediate product can be reduced as much as possible, and the pressure resistance and sealing strength of the battery can are sufficiently ensured. And a method for manufacturing a battery can.
【図１】本発明の実施例におけるカップ状中間製品を示
す断面図。FIG. 1 is a sectional view showing a cup-shaped intermediate product according to an embodiment of the present invention.
【図２】本発明の実施例における絞り兼シゴキ機の概略
断面図。FIG. 2 is a schematic sectional view of an aperture and squeezing machine according to the embodiment of the present invention.
【図３】本発明の実施例における電池缶を示す一部切欠
断面図。FIG. 3 is a partially cutaway sectional view showing a battery can according to the embodiment of the present invention.
【図４】本発明の実施例におけるニカド乾電池を示す一
部切欠断面図。FIG. 4 is a partially cutaway sectional view showing a nickel-cadmium dry battery according to an embodiment of the present invention.
１ カップ状中間製品 １ａ 側周部 ２ 電池缶 ２ａ 側周部 ４ パンチ ５ｂ〜５ｄ シゴキダイス DESCRIPTION OF SYMBOLS 1 Cup-shaped intermediate product 1a side peripheral part 2 Battery can 2a side peripheral part 4 Punch 5b-5d Sigaki die
フロントページの続き (72)発明者 北岡 進 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 米野 永 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 平６−346284（ＪＰ，Ａ) 特開 平４−349340（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01M 2/02 - 2/08 B21D 51/18 Continuing on the front page (72) Inventor Susumu Kitaoka 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Eiji Yoneno 1006 Odaka, Kazuma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56 References JP-A-6-346284 (JP, A) JP-A-4-349340 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H01M 2/02-2/08 B21D 51/18
Claims (2)
用い、この電池缶素材から深絞り工程でカップ状中間製
品を製作し、その後シゴキ工程で前記カップ状中間製品
の側周部を展延させて所定形状の電池缶を製作する電池
缶の製造方法において、電池缶素材として硬度がＨＶ８
０〜９０のものを用い、シゴキ工程によって電池缶の側
周部の硬度がＨＶ２００以上となるようにシゴキ加工を
施すことを特徴とする電池缶の製造方法。1. A cup-shaped intermediate product is manufactured from a nickel-plated steel plate as a battery can material by a deep drawing process from the battery can material, and then a side peripheral portion of the cup-shaped intermediate product is extended in a squeezing process. In a method for manufacturing a battery can having a predetermined shape, a battery can material having a hardness of HV8 is used.
A method for producing a battery can, wherein the battery can is subjected to a squeezing process so that the hardness of the side peripheral portion of the battery can becomes HV 200 or more by a squeezing process using a material having a hardness of 0 to 90.
である請求項１記載の電池缶の製造方法。2. The method according to claim 1, wherein the total height / outer diameter of the battery can is 3.5 or more.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05857995A JP3247570B2 (en) | 1995-03-17 | 1995-03-17 | Battery can manufacturing method |
| US08/615,839 US5787752A (en) | 1995-03-15 | 1996-03-14 | Method to manufacture cell-cans |
| EP96301753A EP0732758A1 (en) | 1995-03-15 | 1996-03-14 | A method to manufacture cell-cans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05857995A JP3247570B2 (en) | 1995-03-17 | 1995-03-17 | Battery can manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08255598A JPH08255598A (en) | 1996-10-01 |
| JP3247570B2 true JP3247570B2 (en) | 2002-01-15 |
Family
ID=13088373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05857995A Expired - Fee Related JP3247570B2 (en) | 1995-03-15 | 1995-03-17 | Battery can manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3247570B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3604879B2 (en) * | 1997-08-05 | 2004-12-22 | 松下電器産業株式会社 | Battery manufacturing method |
| KR100471166B1 (en) * | 1997-09-08 | 2005-03-07 | 마츠시타 덴끼 산교 가부시키가이샤 | Battery and method of manufacturing the same |
-
1995
- 1995-03-17 JP JP05857995A patent/JP3247570B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08255598A (en) | 1996-10-01 |
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