公开(公告)号：US20240356155A1

公开(公告)日：2024-10-24

申请号：US18592528

申请日：2024-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Li ,  Meihuang Chen ,  Yi Zheng ,  Haiyang Kang ,  Runhao Lai ,  Chengdong Sun

IPC: H01M50/42 ,  H01M50/449

CPC classification number: H01M50/42 ,  H01M50/449

Abstract: The present application relates to the technical field of secondary batteries, and more particularly relates to a binder for secondary batteries, a separator, a secondary battery and an electrical apparatus. The binder for secondary batteries is in a ring shape, and includes an acrylate copolymer. The acrylate copolymer has good adhesion, and a contact point of the binder with the ring-shaped structure is a circle line of the ring-shaped binder. The ring-shaped binder has bonding points with larger areas than a spherical binder, such that good bonding performance can be achieved when the usage amount of the binder with the ring-shaped structure is reduced.

公开(公告)号：US20240356156A1

公开(公告)日：2024-10-24

申请号：US18592548

申请日：2024-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Li ,  Haiyang Kang ,  Yi Zheng ,  Meihuang Chen ,  Runhao Lai ,  Peng Wang ,  Chengdong Sun

IPC: H01M50/42 ,  C08J3/12 ,  C08L23/12 ,  C08L33/06 ,  H01M50/417 ,  H01M50/449

CPC classification number: H01M50/42 ,  C08J3/126 ,  C08L23/12 ,  C08L33/066 ,  H01M50/417 ,  H01M50/449 ,  C08J2323/12 ,  C08J2333/08 ,  C08L2203/20 ,  C08L2207/53

Abstract: The present application relates to the technical field of secondary batteries, and in particular to a binder for secondary batteries and a preparation method, a secondary battery, and an electrical apparatus thereof. The binder includes a core structure and a shell structure disposed on a surface of the core structure. The shell structure includes an acrylate copolymer, and the core structure comprises a rigid polymer. The rigid polymer has a crystallinity ranging from 32% to 94%. The binder with a core-shell structure includes the core structure of the rigid polymer. During cold pressing of a battery cell, the rigid polymer acts as a support, making a particle structure of the binder stable, that is, the rigid polymer acts as a support, resulting in an overall increase in the rigidity of the binder.