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Title:
NI-PLATED STEEL SHEET FOR BATTERY CAN HAVING EXCELLENT PRESSABILITY
Document Type and Number:
WIPO Patent Application WO/2011/024443
Kind Code:
A1
Abstract:
Disclosed is an Ni-plated steel sheet which has excellent pressability. Specifically disclosed is an Ni-plated steel sheet which comprises, in a surface that forms the outer surface of a battery can, an Fe-Ni diffusion layer, a softened Ni layer formed thereon, and a semi-glossy Ni plating layer formed thereon. The amount of Ni deposit in the Fe-Ni diffusion layer and the softened Ni layer formed thereon is smaller than the amount of Ni deposit in the semi-glossy Ni plating layer, and the semi-glossy Ni plating layer has an average roughness (Ra) of 1.0-2.0 μm (inclusive) and a maximum height (Ry) of 5-20 μm (inclusive) as determined using a contact-type surface roughness measuring instrument. The amount of Ni deposit in the Fe-Ni diffusion layer and the softened Ni layer formed thereon is 5-8 g/m2, and the amount of Ni deposit in the semi-glossy Ni plating layer is not less than 8 g/m2. In addition, the semi-glossy Ni plating layer has a surface roughness (Ra') in an area of 2.5 μm × 2.5 μm of 5-22 nm as measured by an atomic force microscope.

Inventors:
MINAGI, Hideyuki (LTD. Kudamatsu Plant 1302 Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
三奈木 秀幸 (〒11 山口県下松市東豊井1302番地東洋鋼鈑株式会社下松工場内 Yamaguchi, 〒7448611, JP)
Application Number:
JP2010/005213
Publication Date:
March 03, 2011
Filing Date:
August 24, 2010
Export Citation:
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Assignee:
TOYO KOHAN CO., LTD. (2-12, Yonbancho Chiyoda-k, Tokyo 47, 〒1028447, JP)
東洋鋼鈑株式会社 (〒47 東京都千代田区四番町2番地12 Tokyo, 〒1028447, JP)
MINAGI, Hideyuki (LTD. Kudamatsu Plant 1302 Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
International Classes:
H01M2/02; C25D5/14; C25D7/00
Foreign References:
JP2005149735A
JP2005085480A
JP2007122940A
JP2002050324A
JP2004218043A
JP2007254848A
JP2007302934A
JPH0451012B2
JPH0451021B2
Other References:
See also references of EP 2472631A4
Attorney, Agent or Firm:
OHTA PATENT OFFICE (New State Manor 356, 23-1 Yoyogi 2-chome, Shibuya-k, Tokyo 53, 〒1510053, JP)
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