公开(公告)号：US20240106074A1

公开(公告)日：2024-03-28

申请号：US18526259

申请日：2023-12-01

Applicant: BYD COMPANY LIMITED

Inventor： Liangbin RONG ,  Qiu PAN ,  Xinyue WANG ,  Han CHENG ,  Wansong YUAN

IPC: H01M50/46 ,  H01M4/70 ,  H01M50/107

CPC classification number: H01M50/46 ,  H01M4/70 ,  H01M50/107 ,  H01M2220/20

Abstract: A cylindrical battery includes a housing having an accommodating space; and a negative electrode sheet, a first separator, a positive electrode sheet, and a second separator that are wound multiple turns forming an electrode core. The housing is co-axial with the electrode core that is disposed in the accommodating space. The positive electrode sheet includes a positive electrode material layer and a positive electrode foil layer. The negative electrode sheet includes a negative electrode material layer and a negative electrode foil layer. Some of the wound turns of the positive electrode foil layer extends toward an end of the housing to form a positive electrode tab. Some of the wound turns of the negative electrode foil layer extends toward another end of the housing to form the negative electrode tab.