发明名称 |
Battery and method of its manufacture |
摘要 |
<p>A battery has elements for electromotive-force accommodated in a metal outer can (1), the metal outer can (1) being a metal can (4) with a bottom having a cylindrical shape and a bottom thickness (TA)/side thickness (TB) value of 2.5 &tilde& 5.0. The metal outer can (1) consists chiefly of iron and a nickel layer (8) is provided on at least the inner face of the battery. A multiplicity of shallow grooves (7) perpendicular to the bottom face are formed on the surface of the nickel layer (8). In the method, an iron-based metallic sheet formed with a nickel layer (8) on at least one face is subjected to drawing forming into a tubular shape having a bottom. Continuous ironing processing is performed such that the side of the can formed in the tubular shape has an ironing ratio in the range 20 &tilde& 90% and a metal outer can (1) is thereby manufactured having a bottom thickness (TA)/side thickness (TB) value of 2.5 &tilde& 5.0, having a cylindrical shape. A multiplicity of shallow longitudinal grooves are formed in the nickel layer (8) provided on the battery inside face. <IMAGE></p> |
申请公布号 |
EP1246274(A2) |
申请公布日期 |
2002.10.02 |
申请号 |
EP20020011597 |
申请日期 |
1998.08.03 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MORIWAKI, YOSHIO;IWASE, AKIRA;KITAOKA, SUSUMU;MATSUMOTO, ISAO |
分类号 |
B21D51/26;C22C38/00;H01M2/02;(IPC1-7):H01M2/02 |
主分类号 |
B21D51/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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