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. 29, 2025
Filed:
Oct. 28, 2022
Lg Energy Solution, Ltd., Seoul, KR;
LG ENERGY SOLUTION, LTD., Seoul, KR;
Abstract
A cylindrical secondary battery includes an electrode assembly having a positive electrode, a negative electrode, and a separator located between the positive electrode and the negative electrode, the positive electrode, the negative electrode, and the separator being wound in a winding direction, the positive electrode including a positive electrode uncoated portion exposed beyond the separator, the negative electrode including a negative electrode uncoated portion exposed beyond the separator, a positive electrode current collector plate coupled to the positive electrode uncoated portion by one or more positive electrode welding portions, and a negative electrode current collector plate coupled to the negative electrode uncoated portion by one or more negative electrode welding portions. A coupling area between the positive electrode uncoated portion and the positive electrode current collector plate is smaller than a coupling area between the negative electrode uncoated portion and the negative electrode current collector plate.