Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Cell enclosure structure – e.g. – housing – casing – container,...
Patent
1998-08-04
2000-04-04
Nuzzolillo, Maria
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Cell enclosure structure, e.g., housing, casing, container,...
429175, 429185, 296232, 21912163, 21912164, H01M 202, H01M 208, B23K 2600
Patent
active
060459441
ABSTRACT:
There is a sealed battery including a battery case having a lid hermetically joined to the opening portion of an outer jacket, and having a structure in which an electrolyte injection hole in the battery case is hermetically sealed with a metal sealing lid. This sealed battery includes a battery case having a structure in which a metal lid is welded to the opening portion of a metal outer jacket, an electric-power generating element housed in the battery case and having a positive electrode and a negative electrode with a separator being sandwiched therebetween, an electrolyte injection hole formed in the battery case to allow an electrolyte to be injected, and a sealing lid made of a metal plate material which is seam-welded to the battery case including the electrolyte injection hole by laser welding. The sealing lid has a weld portion formed by the laser welding to have a closed loop surrounding the electrolyte injection hole so as to be seam-welded to the battery case. At least one of start and end points of the weld portion is located outside the closed loop.
REFERENCES:
patent: 4117300 (1978-09-01), Ricards
patent: 4425491 (1984-01-01), Batistoni et al.
patent: 4587182 (1986-05-01), Stiles et al.
patent: 5397660 (1995-03-01), Rossoll et al.
patent: 5879416 (1999-03-01), Nakamura et al.
patent: 5985478 (1999-11-01), Kim
Homma Katsuhisa
Kato Masahiro
Okada Naotada
Crepeau Jonathan
Kabushiki Kaisha Toshiba
Nuzzolillo Maria
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