公开(公告)号：US20210344088A1

公开(公告)日：2021-11-04

申请号：US17134248

申请日：2020-12-25

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu LIANG ,  Qinglin BAI ,  Yanan CAI ,  Hongbo DING

IPC: H01M50/586 ,  H01M50/147 ,  H01M10/04 ,  H01M50/463 ,  H01M50/547

Abstract: Embodiments of the present disclosure relates to an electrode assembly, a secondary battery, a battery pack and a device. The electrode assembly includes: an electrode unit including an electrode body and an electrode terminal part electrically connected with the electrode body; and a first insulating film for being wound around the electrode unit, the first insulating film including a connection part and an extension part connected with each other, the connection part being provided with an adhesive area for connecting with the electrode terminal part, the extension part being a part of the first insulating film extending beyond an end face of the electrode terminal part, and at least part of the extension part being provided as a non-adhesive area.