公开(公告)号：US20250062386A1

公开(公告)日：2025-02-20

申请号：US18668005

申请日：2024-05-17

Applicant: Samsung SDI Co., Ltd.

Inventor： Min Seung KANG ,  Eun Song LEE ,  Eon Woo PARK ,  Kyung Ho KIM ,  Kyeong Yun PARK ,  Myeong Jun JO

IPC: H01M10/04 ,  H01M50/46 ,  H01M50/531

Abstract: A secondary battery includes an electrode assembly including a first separator, a negative electrode plate on the first separator, a second separator on the negative electrode plate, and a positive electrode plate on the second separator, the electrode assembly wound in a jelly-roll shape having a winding start end and a winding finish end, and having a flat portion, and curved portions respectively at one side of the flat portion and at another side of the flat portion, and a finishing tape attached to the winding finish end of the electrode assembly wound in the jelly-roll shape, wherein the positive electrode plate covers an outer surface of the electrode assembly wound in the jelly-roll shape, and has a finish end terminating on the flat portion.