公开(公告)号：US20240258555A1

公开(公告)日：2024-08-01

申请号：US18561128

申请日：2022-05-20

申请人： Panasonic Energy Co., Ltd.

发明人： Arisa Shimizu ,  Kei Kobayashi ,  Gagan Makhija ,  Fumikazu Mizukoshi ,  Atsushi Mizawa

IPC分类号： H01M10/04 ,  H01M50/107 ,  H01M50/538

CPC分类号： H01M10/0431 ,  H01M50/107 ,  H01M50/538

摘要： This non-aqueous electrolyte secondary battery comprises: an electrode body in which a positive electrode and a negative electrode are wound with a separator therebetween; an electrolyte; and a cylindrical outer can, wherein the positive electrode has a current collector and a mixed layer laminated on at least a portion of the surface of the current collector, a plurality of exposed parts where the current collector is exposed are formed on the surface of the positive electrode, tabs are connected to the respective exposed parts, and when the rotation angle of the electrode body from a winding start-side end to a winding finish-side end of the exposed parts relative to the winding center is defined as an exposed part angle, the exposed part angle of the exposed parts positioned on the winding start side is greater than the exposed part angle of the exposed parts positioned on the winding finish side.