公开(公告)号：US20230231271A1

公开(公告)日：2023-07-20

申请号：US18182375

申请日：2023-03-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuping Huang ,  Yunjian Ma ,  Mingfeng Lin ,  Yanhui Li ,  Jianping Zhang ,  Bing Chen ,  Yumeng Liu ,  Zhiyu Xia

IPC: H01M50/431 ,  H01M50/46 ,  H01M10/04

CPC classification number: H01M50/431 ,  H01M10/0431 ,  H01M50/46

Abstract: An electrode assembly, a battery, a battery module, a battery pack and a powered device are provided. The electrode assembly comprises a first electrode piece, a second electrode piece with opposite polarity to the first electrode piece, and a separator arranged between the first electrode piece and the second electrode piece; the electrode assembly is obtained by winding the first electrode piece, the second electrode piece and the separator; and the separator comprises a base film and a coating provided on at least part of the surface of the base film, and the coating comprises a hydraulic inorganic material capable of hardening upon reaction with water. The present application can solve the problem of central hole collapse in the electrode assembly and the battery, and improve the safety performance and cycle performance of the battery.

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.