公开(公告)号：US20230117614A1

公开(公告)日：2023-04-20

申请号：US17937768

申请日：2022-10-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuping Huang ,  Mingfeng Lin ,  Yunjian Ma ,  Honggang Yu ,  Yanhui Li ,  Jianping Zhang ,  Yu Dai ,  Yidong Shen

IPC: H01M50/414 ,  H01M50/457 ,  H01M4/505 ,  H01M4/525 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583

Abstract: A battery, a battery module, a battery pack and an electric device are provided. In some embodiments, the battery includes: a positive electrode, a separator and a negative electrode, wherein the separator includes a base film, a first coating provided on a first surface of the base film, and a second coating provided on a second surface of the base film, the first coating includes a first polar substance, and hydrogen bonds are formed between the first polar substance and a positive binder; hydrogen bonds are formed between the second polar substance and a negative binder and/or a negative active component. In the present disclosure, binding forces between the separator and the positive electrode and the negative electrode may be increased by the hydrogen bonds, thus reducing a cycle expansion rate of a bare cell and improving a high-rate discharge performance and a cycle performance of the battery.