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:
Jun. 22, 2021
Filed:
Jun. 01, 2018
Lg Chem, Ltd., Seoul, KR;
Nam Won Kim, Daejeon, KR;
Pil Kyu Park, Daejeon, KR;
Han Gab Song, Daejeon, KR;
An Soo Jeong, Daejeon, KR;
Abstract
The present invention relates to a secondary battery. The secondary battery comprises an electrode assembly in which an electrode and a separator are alternately stacked and wound, wherein the electrode comprises a collector, a first coating layer in which an electrode active material is applied to a surface of the collector, and a second coating layer in which the electrode active material is applied to the outside of the first coating layer, wherein an end of the second coating layer has a length less than an end of first coating layer in a winding direction of the electrode, and a stepped portion occurs between the end of the first coating layer and the end of the second coating layer in a direction outward from a winding center.