公开(公告)号：US20230261491A1

公开(公告)日：2023-08-17

申请号：US18295931

申请日：2023-04-05

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haotian XIE ,  Xingbu CHEN ,  Xin SUN ,  Bangrun Wang ,  Xiao CHEN ,  Na LIU ,  Chengdu LIANG

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/0525 ,  H01M4/62 ,  C01G53/00

CPC classification number: H02J7/0069 ,  H01M10/446 ,  H01M10/0525 ,  H01M4/628 ,  C01G53/42 ,  H02J7/005

Abstract: A method for recovering activity of a battery includes obtaining a battery state-of-health value of the battery during a charging process, applying an activation voltage to the battery in response to the battery state-of-health value being less than or equal to a first preset threshold such that lithium ions at a lithium supplement agent of the battery are released to an electrolyte solution, and stopping application of the activation voltage and continuing a normal charge-discharge cycle in response to the battery state-of-health value increasing to be greater than or equal to a second preset threshold. The activation voltage is higher than a normal charging voltage of the battery.

公开(公告)号：US20230080029A1

公开(公告)日：2023-03-16

申请号：US18054916

申请日：2022-11-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bangrun Wang ,  Xin Sun

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/66 ,  H01M4/525

Abstract: A secondary battery is provided. In some embodiments, the secondary battery includes an electrode plate and a tab , and the electrode plate includes a current collector and an electrode plate film layer disposed on the current collector. The electrode plate film layer has a first zone and a second zone along an extension direction of the tab, where the second zone is closer to the tab than the first zone, a thickness of the first zone is denoted as H1, a thickness of the second zone is denoted as H2, and the electrode plate film layer satisfies 0.6≤H2/H1

公开(公告)号：US20230057959A1

公开(公告)日：2023-02-23

申请号：US17933120

申请日：2022-09-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun Wang ,  Zhenguo Zhang ,  Chongheng Shen ,  Na Liu

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M10/0525 ,  C01G49/00 ,  C01G51/00 ,  C01G53/00

Abstract: A composite metal oxide material and a preparation method thereof, a positive electrode plate, a secondary battery, a battery module, a battery pack and an electrical device are provided. The composite metal oxide material includes a central core and a coating layer on the surface of the central core, in which the central core material has a chemical formula of Li5FexM1-xO4, 0.6≤x≤1; the coating layer material has a chemical formula of LiMO2, M is one or more metal elements with +3 valence, and the absolute value of the difference between the +3-valence ion radius of Fe and the +3-valence ion radius of M is ≤0.02 nm. The composite metal oxide material of the present disclosure makes the secondary battery have high charge capacity, high discharge capacity and long cycle life.