The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2004
Filed:
Jun. 22, 2001
Kazunori Fujita, Fukushima, JP;
Masanori Anzai, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
A non-aqueous electrolyte secondary cell in which inner shorting may be prevented from occurring and which is improved in operational reliability and safety. The non-aqueous electrolyte secondary cell is comprised of an electrode unit loaded in a cell casing. The electrode unit is comprised at least of a strip-shaped cathode and a strip-shaped anode layered together and coiled longitudinally around a center pin. There is provided a pre-set clearance between the electrode unit and the cell casing so that (B+C)/2A, where A, B and C denote the inner diameter of the cell casing, the maximum outer diameter of the electrode unit and the minimum outer diameter of the electrode unit, respectively, is equal to or more than 0.954 and equal to or less than 0.988. The wound electrode unit has a degree of tightness to give a deformation of no more than 8%.