Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1995-01-17
1998-11-24
Niebling, John
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
429164, 429166, 429168, H01M 204
Patent
active
058404414
ABSTRACT:
A steel plate having a plated layer on the upper and lower surfaces thereof to be processed into a battery can which is cylindrical and open in one end thereof by drawing and ironing processing. The plated steel plate has more than 1.2 as a Lankford value (r) which is a width deformation degree in a lengthwise direction thereof/a thickness deformation degree in the lengthwise direction thereof, a width deformation degree in a widthwise direction thereof/a thickness deformation degree in the widthwise direction thereof, a width deformation degree in an oblique direction thereof/a thickness deformation degree in the oblique direction thereof. In-plane anisotropy Ar which is the difference among the Lankford values (r) is set to be less than .+-.0.15 so that the elongation coefficient of the plated steel plate in lengthwise, widthwise, and oblique directions is almost constant, i.e., so that the generation of earring can be prevented in drawing and ironing a sheet comprising the steel plate into the battery can. In order to make the elongation coefficient of the plated steel plate constant in the three directions, a very low carbon steel plate is used. The steel plate is cold-rolled at 80-90%. The plated layer is allowed to have a granular structure by annealing it after it is plated.
REFERENCES:
patent: 5069989 (1991-12-01), Uetani et al.
patent: 5078809 (1992-01-01), Kinoshita et al.
patent: 5336567 (1994-08-01), Watanabe et al.
Patent Abstracts of Japan, unexamined applications, E section, vol. 17, No. 289, Jun. 3, 1993, p. 130 E 1375 (JP-A-5 21 044).
Katayama et al, Battery can and forming material thereof, Jan. 29, 1993, Abstract.
Hirofumi Sugikawa
Keiichi Hayashi
Sachio Michibata
Bell Bruce F.
Katayama Special Industries Ltd.
Niebling John
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