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:
Jul. 24, 2012
Filed:
Nov. 20, 2007
Jinwook Kim, Yongin-si, KR;
Hideaki Yoshio, Yongin-si, KR;
Jinwan Jeong, Yongin-si, KR;
Jaeil Seong, Yongin-si, KR;
Soonki Woo, Yongin-si, KR;
Jinwook Kim, Yongin-si, KR;
Hideaki Yoshio, Yongin-si, KR;
Jinwan Jeong, Yongin-si, KR;
Jaeil Seong, Yongin-si, KR;
Soonki Woo, Yongin-si, KR;
Samsung SDI Co., Ltd., Gongse-dong, Giheung-gu, Yongin-si, Gyeonggi-do, KR;
Abstract
A secondary battery includes an electrode assembly including: a winding having a positive electrode plate, a negative electrodes plate, and stacked together with a separator interposed between the positive and negative electrode plate; a can having an opening portion to receive the electrode assembly; a cap assembly including a cap plate to close the opening portion of the can, the cap plate having an electrolyte injection hole arranged therein; and a first extension groove having a greater diameter than that of the electrolyte injection hole, the first extension groove being arranged in an entering portion of the electrolyte injection hole and having at least one hollow portion arranged on the surface of the first extension groove.