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:
Aug. 14, 2012
Filed:
Jun. 18, 2010
Cheolwoo Kim, Suwon-si, KR;
Cheolwoo Kim, Suwon-si, KR;
Samsung SDI Co., Ltd., Gongse-dong, Giheung-gu, Yongin-si, Gyeonggi-do, KR;
Abstract
Provided is a cylinder type lithium ion secondary battery capable of preventing an internal electrical short due to compression of a center pin in compression and collision. The cylinder type lithium ion secondary battery includes a cylindrical can, an electrode assembly housed in the cylindrical can, a center pin inserted into the electrode assembly, and a cap assembly sealing the cylindrical can. The center pin has a hollow inner space and a wall surrounding the inner space. Outer diameters of an upper portion and lower portion of the center pin are larger than an outer diameter of a central portion of the center pin. Therefore, an internal electrical short due to compression of the center pin can be prevented in compression and collision.