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:
Nov. 22, 2011
Filed:
Sep. 08, 2007
Sungjong Kim, Daejeon, KR;
IN Sung Lee, Seoul, KR;
Jaehan Jung, Daejeon, KR;
Geun Ho Seo, Busan, KR;
Dongsub Lee, Gyeonggi-do, KR;
Munsung Kim, Daejeon, KR;
Ji Hyun Lee, Chungcheongbuk-do, KR;
Nakjin Kim, Daejeon, KR;
Sungjong Kim, Daejeon, KR;
In Sung Lee, Seoul, KR;
Jaehan Jung, Daejeon, KR;
Geun Ho Seo, Busan, KR;
Dongsub Lee, Gyeonggi-do, KR;
Munsung Kim, Daejeon, KR;
Ji Hyun Lee, Chungcheongbuk-do, KR;
Nakjin Kim, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed herein is a cylindrical secondary battery constructed in a structure in which a crimping region, at which a cap assembly is mounted to the open upper end of a cylindrical container having an electrode assembly mounted therein, is formed at the upper end of the container, wherein the crimping region is constructed in a structure in which the upper end of the crimping region is gently bent at a predetermined radius of curvature (R), such that the crimping region surrounds a gasket located at the inside of the crimping region, the bent front end extends inward, such that the bent end presses the gasket, and an inclination of a predetermined angle is formed at the sidewall of the crimping region, such that the upper part of the crimping region is directed inward. According to the secondary battery of the present invention, the sealability of the gasket is improved, and external impacts are partially absorbed by the inclination formed at the crimping region. Consequently, the deformation of the crimping region is minimized, whereby the leakage of the electrolyte is prevented, and the safety of the battery is greatly improved.