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:
Jan. 21, 2003
Filed:
Mar. 14, 2000
Shin-Kobe Electric Machinery Co., Ltd., Tokyo, JP;
Abstract
A cylindrical lithium-ion battery with excellent safety where abnormal heat generation and remarkable deformation of a battery container do not occur even at an abnormal time is provided. When an average diameter of a winding group is A mm, an inner diameter of the battery container is B mm, a longitudinal length of the winding group except for lead pieces extending from the winding group is H mm, and the number of windings where a layer of one unit comprising a negative electrode member/separator/negative electrode member/separator is wound around a shaft core is W, a calculation value K obtained by a formula; K=(B−A)×(10000/(W×H) is set to 0.89 or more. When the calculation value K is 0.89 or more, a gap (B−A) between an outer periphery of the winding group and an inner periphery of the battery container that enables the winding group to expand in its diameter direction at an abnormal time is properly secured.