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. 15, 2025
Filed:
Jul. 15, 2021
Lg Energy Solution, Ltd., Seoul, KR;
Min Su Cho, Daejeon, KR;
Byung Sup Kim, Daejeon, KR;
Joo Hwan Sung, Daejeon, KR;
Yong Gon Lee, Daejeon, KR;
Geun Young Park, Daejeon, KR;
Min Gyu Kim, Daejeon, KR;
Min Seon Kim, Daejeon, KR;
Yeong Hun Jung, Daejeon, KR;
Sang Hak Chae, Daejeon, KR;
LG ENERGY SOLUTION, LTD., Seoul, KR;
Abstract
A button-type secondary battery includes an electrode assembly including a first separator, a negative electrode, a second separator, and a positive electrode that are sequentially stacked and wound, wherein ends of the first separator and the second separator are disposed closer to a center of the wound electrode assembly than ends of the positive electrode and the negative electrode; an electrolyte; and a can in which the electrode assembly and the electrolyte are accommodated. In the electrode assembly, an expansion member is attached to at least one central end of the first separator or the second separator, and the expansion member is expanded by absorbing the electrolyte.