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:
Mar. 15, 2005
Filed:
Mar. 28, 2001
Akio Enomoto, Chita-gun, JP;
Kenji Kawamura, Nagoya, JP;
Kenshin Kitoh, Nagoya, JP;
Toshihiro Yoshida, Nagoya, JP;
Akio Enomoto, Chita-gun, JP;
Kenji Kawamura, Nagoya, JP;
Kenshin Kitoh, Nagoya, JP;
Toshihiro Yoshida, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A lithium secondary battery has an internal electrode body formed by winding a positive electrode and a negative electrode on an outer peripheral wall of a hollow winding core and filled with nonaqueous electrolyte solution, a cylindrical battery case containing this internal electrode body 1 inside with its both ends being open, and electrode caps which each have a battery cap, an internal terminal, and an external terminal, the internal electrode body being sealed by the electrode caps at both open ends of the battery case. At least one of the electrode caps has a pressure release hole in a position corresponding with the center axis of the winding core.