公开(公告)号：US20240304945A1

公开(公告)日：2024-09-12

申请号：US18658920

申请日：2024-05-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yanyun Ma ,  Haiyi Hong ,  Xiaonan Cheng ,  Peng Wang ,  Lei Chao ,  Jianrui Yang ,  Yi Zheng ,  Chengdong Sun

IPC: H01M50/446 ,  H01M50/42 ,  H01M50/434

CPC classification number: H01M50/446 ,  H01M50/42 ,  H01M50/434

Abstract: This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The coating is formed on at least part of a surface of the substrate, the coating includes composite particles, first inorganic particles, and a binder, the composite particles form bulges on a surface of the coating, the composite particles include polyacrylate particles and ion-conducting particles, and the ion-conducting particle is present between at least two polyacrylate particles. A mass ratio of the first inorganic particles to the ion-conducting particles is 1:0.007-0.06.

公开(公告)号：US20240145868A1

公开(公告)日：2024-05-02

申请号：US18410993

申请日：2024-01-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyi Hong ,  Jianrui Yang ,  Haiyang Kang ,  Chengdong Sun ,  Yi Zheng ,  Lei Chao

IPC: H01M50/451 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/423 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/46 ,  H01M50/491

CPC classification number: H01M50/451 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/423 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/457 ,  H01M50/461 ,  H01M50/491 ,  H01M2220/20

Abstract: Provided a separator, a preparation method thereof, and a secondary battery, a battery module, a battery pack, and an electric apparatus containing such separator. The separator includes: a substrate and a coating applied on at least one surface of the substrate, where the coating includes 40 wt % to 90 wt % first organic particles, 2 wt % to 15 wt % pressure-sensitive binder, and optionally 0 wt % to 50 wt % second organic particles. The first organic particles include an organic polymer and an inorganic substance. The pressure-sensitive binder includes an organic polymer and a plasticizer. The separator has good ionic conductivity and adhesion performance at room temperature, is not adhered under a pressure of 1 MPa or below and is significantly adhered under a pressure of 2 MPa or above, which can significantly improve structural stability and ionic conductivity of an electrochemical device while satisfying requirements for yield rate of production and kinetic performance of a battery cell.