JPH05109393A - Manufacture of square-type sealed battery - Google Patents
Manufacture of square-type sealed batteryInfo
- Publication number
- JPH05109393A JPH05109393A JP3269499A JP26949991A JPH05109393A JP H05109393 A JPH05109393 A JP H05109393A JP 3269499 A JP3269499 A JP 3269499A JP 26949991 A JP26949991 A JP 26949991A JP H05109393 A JPH05109393 A JP H05109393A
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- case
- steel plate
- square
- battery
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 58
- 229910052759 nickel Inorganic materials 0.000 abstract description 29
- 230000007547 defect Effects 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 3
- 230000005611 electricity Effects 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 29
- 238000003860 storage Methods 0.000 description 5
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910052742 iron 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
- 239000000463 material Substances 0.000 description 1
- 229910001453 nickel ion Inorganic materials 0.000 description 1
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- 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
- Sealing Battery Cases Or Jackets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電池容器材料に鋼板を
使用した角形密閉電池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 prismatic closed battery using a steel plate as a battery container material.
【０００２】[0002]
【従来の技術】角形密閉電池は、内側と外側とにニッケ
ルメッキをした鋼板を使用して角形ケースを製造してい
る。角形ケースの内面に設けられるニッケルメッキは、
電解液による腐食を防止し、外面のニッケルメッキは腐
食による電気機器との接触不良を防止する。ニッケルメ
ッキの不良は、電池性能を低下させる。このため、角形
ケースは、内外両面をニッケルメッキで被覆することが
大切である。両面をニッケルメッキした角形ケースは、
構造鋼板をプレス工程した後ニッケルメッキすることに
よって製造できる。しかしながら、この方法は、角形ケ
ースの内面に均一な膜厚でニッケルメッキをすることが
極めて困難である。それは、開口部が小さくて奥行きが
深いので、角形ケースの内部における電位勾配が低く、
底の部分では電離したニッケルイオンを電気的な吸着力
で充分に吸着できないことが理由である。2. Description of the Related Art A prismatic sealed battery is manufactured by using a nickel-plated steel plate on the inside and outside of the prismatic case. The nickel plating provided on the inner surface of the rectangular case is
Prevents corrosion due to electrolytic solution, and nickel plating on the outer surface prevents poor contact with electrical equipment due to corrosion. Poor nickel plating reduces battery performance. For this reason, it is important to coat both the inner and outer surfaces of the rectangular case with nickel plating. Square case with nickel plating on both sides,
It can be manufactured by subjecting a structural steel plate to a press process and then nickel plating. However, with this method, it is extremely difficult to perform nickel plating on the inner surface of the rectangular case with a uniform film thickness. Since it has a small opening and a large depth, the potential gradient inside the rectangular case is low,
The reason is that the ionized nickel ions cannot be sufficiently adsorbed by the electric adsorption force at the bottom portion.
【０００３】この欠点は、ニッケルメッキを施した鋼板
をプレス工程することによって解消できる。このように
して角形ケースを製造する方法が特開昭５７−２５６６
６号公報に記載されている。この方法は、両面にニッケ
ルメッキをした鋼板をプレス加工して角形ケースとし、
さらに、成形後にもニッケルメッキをしている。この方
法で製造された角形ケースは、ニッケルメッキ層の不良
に起因する欠点を解消できる特長がある。This drawback can be solved by pressing a steel plate plated with nickel. A method of manufacturing a rectangular case in this manner is disclosed in Japanese Patent Laid-Open No. 57-2566.
No. 6 publication. This method presses steel plate with nickel plating on both sides to make a square case,
Furthermore, nickel plating is performed even after molding. The rectangular case manufactured by this method has a feature that a defect caused by a defect of the nickel plating layer can be eliminated.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うに、ニッケルメッキを施した鋼板から絞り加工によっ
て角形ケースを作ると、成形金型の消耗が激しく、その
寿命がメッキなしの鋼板を加工する場合に比べて著しく
短くなるという問題点がある。それは、ニッケルメッキ
の表面が微細な凹凸状をしており、加工時の摩擦で金型
表面を摩耗することが理由である。However, when a rectangular case is formed from a nickel-plated steel sheet by drawing as described above, the molding die wears down drastically and the life of the steel sheet is unplated. There is a problem that it is significantly shorter than This is because the surface of the nickel plating has fine irregularities and the mold surface is abraded by friction during processing.
【０００５】角形ケースをプレスする工程を示すと図３
のようになる。図に示すように、オス型が矢印Ａの方向
にプレスされるにつれ、鋼板は、オス型とメス型の間で
絞られて、角形ケース形状に成形が進行する。鋼板を挟
んでプレス成形が進行するとき、すなわち、オス型がメ
ス型に挿入されるときに、鋼板の角形ケース外側となる
面と、メス型の内側との間で特に強い摩擦力が働く。そ
れは、鋼板がメス型とオス型との間に引き込まれて角形
ケース形状に成形されるからである。このため、メス型
の開口部隅角が特に摩耗する。FIG. 3 shows the process of pressing the rectangular case.
become that way. As shown in the figure, as the male die is pressed in the direction of arrow A, the steel sheet is squeezed between the male die and the female die, and the forming progresses into a rectangular case shape. When the press forming proceeds with the steel sheet sandwiched, that is, when the male die is inserted into the female die, a particularly strong frictional force acts between the surface of the steel sheet that is the outer side of the rectangular case and the inner side of the female die. This is because the steel plate is drawn between the female mold and the male mold to form a rectangular case shape. Therefore, the corner angle of the female opening is particularly worn.
【０００６】メス型開口部の摩耗は、角形ケースの開口
部の加工精度を低下させる。角形ケースは、開口部に極
めて高い加工精度が要求される。それは、図２に示すよ
うに、ここに封口蓋を嵌着して、封口蓋と角形ケースと
の間をレーザー溶接してケースを密封するからである。
角形ケースの開口部の加工精度が低いと、封口蓋と角形
ケースとの間に隙間ができて、角形ケースを密封できな
い欠陥がある。The wear of the female opening reduces the processing accuracy of the opening of the rectangular case. The rectangular case requires extremely high processing accuracy in the opening. This is because, as shown in FIG. 2, a sealing lid is fitted here and the case is sealed by laser welding between the sealing lid and the rectangular case.
If the processing accuracy of the opening of the prismatic case is low, there is a defect that a gap is created between the sealing lid and the prismatic case and the prismatic case cannot be sealed.
【０００７】角形密閉電池は、電子機器の小型、薄型化
の発達に伴い、容積効率に優れることから急速に使用量
が増加している。円筒形の密閉電池のように、外装缶の
開口部をかしめて気密に密封することが難しい。容積効
率を低下させずに、しかも、過充電、過放電時などに発
生するガス圧力に耐えるものとするために、封口蓋を嵌
着して、角形ケースとの接合部をレーザー溶接により密
封する製造方法が採用される。このため、角形ケースの
開口部を高い精度でプレス加工することが極めて大切で
ある。The prismatic sealed battery is rapidly increasing in its usage amount because it is excellent in volumetric efficiency with the development of small and thin electronic devices. Like a cylindrical sealed battery, it is difficult to caulk the opening of the outer can to hermetically seal it. In order to withstand the gas pressure generated during overcharge and overdischarge without lowering the volumetric efficiency, a sealing lid is fitted and the joint with the rectangular case is sealed by laser welding. A manufacturing method is adopted. Therefore, it is very important to press the opening of the rectangular case with high accuracy.
【０００８】この欠点を解決するために、角形ケースの
内側となる面に無光沢メッキを、外側となる面に光沢メ
ッキをした鋼板をプレス加工する方法が開発されている
（特開平３−４３９５３号公報）。この公報に記載され
る方法は、角形ケースの外側面となる鋼板に光沢メッキ
をして、メス型の摩耗を少なくしている。この公報に記
載される方法によると、通常のニッケルメッキを施して
光沢メッキをプレス加工するのに比較して、メス型の摩
耗を少なくできる。しかしながら、この方法は、鋼板の
両面を異なるメッキ浴に浸漬して光沢メッキと無光沢メ
ッキとをするので、メッキ工程が複雑となり、さらに、
プレス工程における鋼板の摩擦による無光沢メッキの損
傷を皆無にできない欠点があった。In order to solve this drawback, there has been developed a method of pressing a steel sheet having a matte plating on the inner surface and a glossy plating on the outer surface of a rectangular case (Japanese Patent Laid-Open No. 3-43953). Publication). In the method described in this publication, the steel plate which is the outer surface of the square case is plated with gloss to reduce the wear of the female die. According to the method described in this publication, the wear of the female die can be reduced as compared with the case where the ordinary nickel plating is performed and the bright plating is pressed. However, in this method, both surfaces of the steel sheet are dipped in different plating baths to perform bright plating and matte plating, which complicates the plating process, and further,
There is a drawback in that it is impossible to completely prevent damage to the matte plating due to friction of the steel plate in the pressing process.
【０００９】本発明は、さらにこの欠点を解決すること
を目的に開発されたもので、本発明の重要な目的は、金
型の摩耗を極減して角形ケースの加工精度を高くでき、
角形ケースと封口蓋との密封不良を防止できる角形密閉
電池の製造方法を提供するにある。The present invention was developed with the object of resolving this drawback. An important object of the present invention is to significantly reduce the wear of the mold and improve the machining accuracy of the rectangular case.
Another object of the present invention is to provide a method for manufacturing a prismatic sealed battery capable of preventing a poor sealing between a prismatic case and a sealing lid.
【００１０】[0010]
【問題点を解決するための手段】本発明は、前述の目的
を達成するために、下記のようにして角形密閉電池を製
造する。すなわち、本発明の製造方法は、ニッケルメッ
キされた鋼板４を成形加工して角形ケース１とするプレ
ス工程と、成形加工された角形ケース１内に、発電要素
と電解液とを収納した後、該角形ケース１の開口部に封
口蓋２をし、その接合部をレーザー溶接により密封する
方法を改良したもので、プレス加工される鋼板４に、片
面にニッケルメッキを施したものを使用すると共に、こ
の鋼板４はニッケルメッキ面を電池の内側としてプレス
成形し、さらに、プレス成形した角形ケース１の表面に
ニッケルメッキを施し、この角形ケース１に発電要素と
電解液とを収納して封口蓋２で密封することを特徴とす
るものである。In order to achieve the above-mentioned object, the present invention manufactures a prismatic sealed battery as follows. That is, according to the manufacturing method of the present invention, after pressing the nickel-plated steel plate 4 to form the rectangular case 1, and after storing the power generation element and the electrolytic solution in the formed rectangular case 1, This is an improved method in which a sealing lid 2 is provided at the opening of the rectangular case 1 and the joint is sealed by laser welding. A steel plate 4 to be pressed is plated on one side with nickel. The steel plate 4 is press-molded with the nickel-plated surface facing the inside of the battery, and the surface of the press-molded rectangular case 1 is nickel-plated. It is characterized by being sealed with 2.
【００１１】[0011]
【作用】図３に示すように、ニッケルメッキを施した鋼
板４を、絞り加工して角形ケースとする場合、特に、角
形ケースの外側面に接触するメス型３に強い摩擦力が作
用する。この摩擦力は、メス型３の消耗を促進する。メ
ス型３の摩耗は、特に高い精度が要求される開口部に発
生する。このため、メス型３の寿命は、メッキなしの鋼
板４を加工する場合に比べて著しく短くなる。それは、
ニッケルメッキの表面が微細な凹凸状であり、加工時の
摩耗で金型表面を摩擦するからである。As shown in FIG. 3, when a nickel-plated steel plate 4 is drawn into a rectangular case, a strong frictional force acts especially on the female die 3 that contacts the outer surface of the rectangular case. This frictional force promotes wear of the female die 3. The wear of the female die 3 occurs in the opening that requires particularly high accuracy. Therefore, the life of the female die 3 is significantly shorter than that in the case of processing the steel plate 4 without plating. that is,
This is because the nickel-plated surface has fine irregularities, and the die surface rubs due to wear during processing.
【００１２】ニッケルメッキの摩擦によるメス型の摩耗
を防止するために、光沢メッキをした鋼板４をプレス加
工する方法が開発されているが、この方法は、プレスす
るときに光沢メッキに摩擦歪みが発生し、成形された電
池ケース外側表面はあれており、錆が発生する等の欠点
がある。In order to prevent the wear of the female die due to the friction of the nickel plating, a method of press-working the steel plate 4 that has been subjected to the gloss plating has been developed. The outer surface of the battery case, which is generated and formed, is roughened, and there is a defect that rust occurs.
【００１３】これに対して、本発明の方法は、片面のみ
をニッケルメッキした鋼板を使用して、ニッケルメッキ
面が角形ケースの内側となるようにプレス工程するの
で、メス型の表面がニッケルメッキに摩擦されることが
ない。メス型３に接触する鋼板４の外側はメッキがな
く、メス型３の摩擦による摩耗を極減して、角形ケース
の加工精度が向上し、また、金型の寿命を延長できる。On the other hand, in the method of the present invention, a steel plate having only one surface plated with nickel is used, and the pressing process is performed so that the nickel-plated surface is inside the rectangular case. Therefore, the surface of the female die is nickel-plated. Never be rubbed by. There is no plating on the outer side of the steel plate 4 that comes into contact with the female die 3, wear due to friction of the female die 3 is extremely reduced, the machining accuracy of the rectangular case is improved, and the life of the die can be extended.
【００１４】[0014]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。但し、以下に示す実施例は、本発明の技術思想を
具体化するための方法を例示すものであって、本発明
は、使用材料、加工機器、製造される角形密閉電池の構
造等を下記のものに特定するものでない。本発明の角形
密閉電池の製造方法は、特許請求の範囲に於て、種々の
変更を加えることができる。Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below are examples of methods for embodying the technical idea of the present invention, and the present invention describes the materials used, the processing equipment, the structure of the prismatic closed battery to be produced, etc. It is not specific to one. The method for manufacturing the prismatic sealed battery of the present invention can be modified in various ways within the scope of the claims.
【００１５】更に、この明細書は、特許請求の範囲を理
解し易いように、実施例に示される部材に対応する番号
を、「特許請求の範囲」、および「課題を解決する為の
手段の欄」に示される部材に付記している。ただ、特許
請求の範囲に示される部材を、実施例の部材に特定する
ものでは決してない。Further, in this specification, for easier understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claims" and "means for solving the problems". It is added to the members shown in "Column". However, the members shown in the claims are not limited to the members of the embodiment.
【００１６】［実施例Ａ］下記のようにして、本発明の
角形密閉電池Ａを製造する。 ニッケルメッキされた鋼板４を成形加工して角形ケ
ースとする。鋼板４には、冷間圧延して製造された鉄板
を使用する。鋼板は、片面に、膜厚が３μｍのニッケル
メッキを施している。この鋼板を使用して、縦×横×高
さの各外径寸法を、５．６×１６．４×４５．２ｍｍの
角形ケースに絞り加工する。絞り加工する工程におい
て、鋼板４は、ニッケルメッキ面を角形ケースの内面と
する。すなわち、ニッケルメッキされた面はオス型の表
面に接触し、メス型３にはメッキされない面が接触する
ようにしてプレス加工する。Example A A prismatic sealed battery A of the present invention is manufactured as follows. The nickel-plated steel plate 4 is formed into a rectangular case. As the steel plate 4, an iron plate manufactured by cold rolling is used. The steel sheet has one surface plated with nickel having a film thickness of 3 μm. Using this steel sheet, each outer diameter dimension of length x width x height is drawn into a square case of 5.6 x 16.4 x 45.2 mm. In the drawing process, the steel plate 4 has a nickel-plated surface as the inner surface of the rectangular case. That is, the nickel-plated surface comes into contact with the surface of the male die, and the female die 3 is brought into contact with the surface not to be plated, and press working is performed.
【００１７】 プレス加工された角形ケースをニッケ
ルメッキする。この工程で、ニッケルメッキは、角形ケ
ースの外側にのみ付着すれば足りる。ただ、この工程で
外側と内側の両面にニッケルメッキを付着することも可
能である。The pressed rectangular case is nickel-plated. In this step, the nickel plating need only adhere to the outside of the rectangular case. However, it is also possible to deposit nickel plating on both the outside and inside in this process.
【００１８】この工程において、角形ケースの内面にも
ニッケルメッキを施すと、プレス工程において角形ケー
ス１内面のニッケルメッキにキズができてもこれを覆う
ことができる。この場合、角形ケースの内側は、プレス
工程の前にニッケルメッキをしているので、厚くメッキ
する必要がない。In this step, if the inner surface of the rectangular case is also plated with nickel, even if the nickel plating on the inner surface of the rectangular case 1 is damaged in the pressing step, it can be covered. In this case, since the inside of the rectangular case is nickel-plated before the pressing step, it is not necessary to thickly plate it.
【００１９】 角形ケース１の開口部に内接するよう
に、４．８×１５．６ｍｍの外径寸法に加工した封口蓋
をニッケルメッキする。A sealing lid processed into an outer diameter of 4.8 × 15.6 mm is nickel-plated so as to be inscribed in the opening of the rectangular case 1.
【００２０】 次に、ニッケル水酸化物を主体とした
正極と、カドミウムを主体とした負極と、セパレータ等
からなる発電要素を角形ケース１に挿入し、さらに、電
解液として用いるアルカリ水溶液を角形ケースに充填す
る。Next, a power generating element including a positive electrode mainly composed of nickel hydroxide, a negative electrode mainly composed of cadmium, and a separator is inserted into the rectangular case 1, and an alkaline aqueous solution used as an electrolytic solution is further added to the rectangular case 1. To fill.
【００２１】 安全弁を兼ねた端子を取り付けた封口
蓋２を角形ケース１に嵌着し、図２に示すように、ＹＡ
Ｇレーザー溶接機を使って密閉して、図１に示すように
角形ケース１の開口部を封口蓋２で密閉した本発明によ
る角形密閉ニッケルーカドミウム蓄電池Ａを作製する。A sealing lid 2 having a terminal that also serves as a safety valve is fitted into the rectangular case 1, and as shown in FIG.
A rectangular sealed nickel-cadmium storage battery A according to the present invention in which the opening of the rectangular case 1 is sealed with a sealing lid 2 as shown in FIG.
【００２２】［比較例Ｂ］比較のために、両面ともニッ
ケルメッキを施した鋼板を用いて角形ケースとする以外
は、全て実施例Ａと同様にして、従来法による角形密閉
ニッケルーカドミウム蓄電池Ｂを作製した。[Comparative Example B] For comparison, a rectangular sealed nickel-cadmium storage battery B according to the conventional method was manufactured in the same manner as in Example A except that a steel case with nickel plating on both sides was used to form a rectangular case. Was produced.
【００２３】［比較例Ｃ］更に、予め成形した後にニッ
ケルメッキを施した角形ケースと封口蓋を用いた以外
は、実施例Ａと同様にして、従来法による角形密閉ニッ
ケルーカドミウム蓄電池Ｃを作製した。[Comparative Example C] Further, a rectangular closed nickel-cadmium storage battery C by a conventional method was prepared in the same manner as in Example A except that a rectangular case and a sealing lid which had been preformed and then plated with nickel were used. did.
【００２４】［比較例Ｄ］さらに、両面ともにニッケル
メッキを施した鋼板を成形した後に、ニッケルメッキを
施したケースと封口蓋を用いた以外は、実施例Ａと同様
にして従来法による角形密閉ニッケルーカドミウム蓄電
池Ｄを作製した。[Comparative Example D] A square-shaped hermetically sealed product according to the conventional method was used in the same manner as in Example A except that a nickel-plated steel plate was formed on both sides and then a nickel-plated case and a sealing lid were used. A nickel-cadmium storage battery D was produced.
【００２５】次に本発明の電池Ａと、従来の電池Ｂ、
Ｃ、およびＤについてケースの絞り成形用金型の耐久性
およびケースと封口蓋２の溶接部の不良発生率を調べ
た。その結果を表１に示す。Next, the battery A of the present invention and the conventional battery B,
With respect to C and D, the durability of the draw forming die of the case and the defect occurrence rate of the welded portion between the case and the sealing lid 2 were examined. The results are shown in Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】※１ 成形時の摩擦により、再研磨が必要
となるまでに成形可能なケースの加工個数 ※２ 溶接部からのリーク不良の発生率 ※３ ４５℃、１／２ケ月放置後の電池容量の初期容量
に対する残存率* 1 Number of cases that can be molded before re-polishing is required due to friction during molding * 2 Occurrence rate of leak defects from welds * 3 Battery after left at 45 ° C for 1/2 month Remaining rate of capacity to initial capacity
【００２８】表１から明かなように、成形用金型の寿命
は、本発明による電池Ａが両面ニッケルメッキを施した
電池Ｂ、Ｄに比べて著しく向上していることがわかる。As can be seen from Table 1, the life of the molding die is significantly improved in comparison with the batteries A and D having the nickel plating on both sides of the battery A according to the present invention.
【００２９】また、溶接部の不良発生率を比較しても、
本発明の方法で製造した電池Ａが０．１％以下と小さい
のに比べて、電池ＢとＤとは成形用金型の摩耗が激しい
のに比例して、ケースの寸法精度や形状不良が生じ、溶
接後の不良発生率の増加の原因となっている。また、電
池Ｃでは、さらに不良発生率が高くなった。これに対し
て、本発明の方法で製造した電池Ａは、開口部の寸法精
度が向上し、溶接不良に至る欠陥が極減され、さらに、
電池の保存特性においても優れた特性を示した。Further, comparing the defective occurrence rates of the welded portions,
In comparison with the battery A manufactured by the method of the present invention being as small as 0.1% or less, the batteries B and D are in proportion to the severe wear of the molding die, and the dimensional accuracy and the shape defect of the case are not proportional Occurs, which causes an increase in the defect occurrence rate after welding. Moreover, in the battery C, the defect occurrence rate was further increased. On the other hand, in the battery A manufactured by the method of the present invention, the dimensional accuracy of the opening is improved and the defects leading to welding defects are extremely reduced.
It also showed excellent storage characteristics of the battery.
【００３０】[0030]
【発明の効果】本発明の角形密閉電池の製造方法は、角
形ケースの内側となる鋼板の片面にニッケルメッキをし
てプレス加工し、絞り加工した後で角形ケースの外側面
にニッケルメッキをしている。この状態で絞り加工する
と、メス型にはニッケルメッキされない鋼板の表面が接
触、摩擦される。このため、絞り加工するメス型の摩耗
を極減して、成形用金型の寿命を著しく延長でき、これ
によって角形ケースの成形コストを低減できる。According to the method for manufacturing a prismatic sealed battery of the present invention, one side of a steel plate which is the inside of the prismatic case is nickel-plated and pressed, and after drawing, the outside surface of the prismatic case is nickel-plated. ing. When drawing is performed in this state, the surface of the steel sheet not nickel-plated is brought into contact with and rubbed with the female die. Therefore, the wear of the female die to be drawn can be minimized and the life of the molding die can be remarkably extended, whereby the molding cost of the rectangular case can be reduced.
【００３１】さらに、摩耗の少ない金型を使用して角形
ケースを高精度に加工できるので、溶接部の信頼性を相
当に高くして、液漏れ等を極減できる特長も実現する。Furthermore, since the rectangular case can be processed with high precision by using a die with less wear, the reliability of the welded portion can be considerably increased, and the feature that liquid leakage and the like can be minimized is realized.
【図１】 本発明の方法で製造される角形密閉電池の一
例を示す斜視図FIG. 1 is a perspective view showing an example of a prismatic sealed battery manufactured by the method of the present invention.
【図２】 図１に示す角形密閉電池の角形ケースと封口
蓋との溶接部分を示す拡大断面図FIG. 2 is an enlarged cross-sectional view showing a welded portion between the rectangular case and the sealing lid of the rectangular sealed battery shown in FIG.
【図３】 鋼板をプレス加工する金型を示す断面図FIG. 3 is a sectional view showing a die for pressing a steel plate.
１…角形ケース ２…封口蓋 ３…メス型 ４…鋼板 1 ... Square case 2 ... Sealing lid 3 ... Female type 4 ... Steel plate
Claims (1)
工して角形ケース(1)とするプレス工程と、成形加工さ
れた角形ケース(1)内に、発電要素と電解液とを収納し
た後、該角形ケース(1)の開口部に封口蓋(2)を嵌着し、
その接合部をレーザー溶接により密封する電池の製造方
法において、 プレス加工される鋼板(4)に、片面にニッケルメッキを
施したものが使用されると共に、この鋼板(4)はニッケ
ルメッキ面を電池の内側としてプレス成形され、さら
に、プレス成形した角形ケース(1)の外側表面にニッケ
ルメッキを施し、この角形ケース(1)に発電要素と電解
液とを収納して封口蓋(2)で密封することを特徴とする
角形密閉電池の製造方法。1. A pressing process for forming a rectangular case (1) by forming a nickel-plated steel plate (4), and a power generating element and an electrolyte solution are housed in the formed rectangular case (1). After that, the sealing lid (2) is fitted into the opening of the rectangular case (1),
In a battery manufacturing method in which the joint is sealed by laser welding, a steel plate (4) to be pressed is used with one side being nickel-plated. The inner surface of the square case (1) is press-molded, and the outer surface of the press-molded rectangular case (1) is nickel-plated. A method for manufacturing a prismatic closed battery, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3269499A JP2940732B2 (en) | 1991-10-17 | 1991-10-17 | Manufacturing method of prismatic sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3269499A JP2940732B2 (en) | 1991-10-17 | 1991-10-17 | Manufacturing method of prismatic sealed battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05109393A true JPH05109393A (en) | 1993-04-30 |
| JP2940732B2 JP2940732B2 (en) | 1999-08-25 |
Family
ID=17473280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3269499A Expired - Fee Related JP2940732B2 (en) | 1991-10-17 | 1991-10-17 | Manufacturing method of prismatic sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2940732B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7601460B2 (en) | 2003-11-28 | 2009-10-13 | Panasonic Corporation | Prismatic battery and manufacturing method thereof |
| JP2018181698A (en) * | 2017-04-18 | 2018-11-15 | Fdk株式会社 | Can for battery, manufacturing method of can for battery and battery including can for battery |
-
1991
- 1991-10-17 JP JP3269499A patent/JP2940732B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7601460B2 (en) | 2003-11-28 | 2009-10-13 | Panasonic Corporation | Prismatic battery and manufacturing method thereof |
| JP2018181698A (en) * | 2017-04-18 | 2018-11-15 | Fdk株式会社 | Can for battery, manufacturing method of can for battery and battery including can for battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2940732B2 (en) | 1999-08-25 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |