公开(公告)号：US20240313225A1

公开(公告)日：2024-09-19

申请号：US18670605

申请日：2024-05-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Haiyang KANG ,  Yi ZHENG ,  Chengdong SUN ,  Yang YU ,  Chuying OUYANG

IPC: H01M4/62

CPC classification number: H01M4/622

Abstract: This application discloses a binder, a separator, an electrode plate, an electrode assembly, a battery cell, a battery, and an electric apparatus, and relates to the field of battery technologies. The binder includes an organic polymer and an inorganic substance, and the binder has a first glass transition temperature and a second glass transition temperature within a range of −10° C. to 95° C., where the first glass transition temperature is higher than the second glass transition temperature. The organic polymer and the inorganic substance act together to obtain the binder with good adhesion performance and appropriate glass transition temperatures, suitable for fully exerting the adhesion performance of the binder under battery operation conditions, and thereby improving the kinetic and safety performance of batteries.

公开(公告)号：US20220158259A1

公开(公告)日：2022-05-19

申请号：US17589714

申请日：2022-01-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yang YU

IPC: H01M10/42 ,  H01M4/13 ,  H01M10/0525

Abstract: An electrochemical energy storage apparatus and a device are provided. The electrochemical energy storage apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, where the positive electrode plate includes a positive electrode current collector, a positive electrode active substance layer disposed on at least one surface of the positive electrode current collector, and a safety layer disposed between the positive electrode active substance layer and the positive electrode current collector; the positive electrode active substance layer includes a positive electrode active substance; the safety layer includes a binding substance, a conductive substance, and an overcharge sensitive substance; the overcharge sensitive substance is a polymer containing monosaccharide structural units and containing at least one of carbonate groups or phosphate groups; the electrolyte includes a solvent and an electrolytic salt; and the solvent includes a carbonate-based solvent.

公开(公告)号：US20220109159A1

公开(公告)日：2022-04-07

申请号：US17511059

申请日：2021-10-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yang YU

IPC: H01M4/62

Abstract: This application provides a positive electrode plate, including a positive current collector, a positive active material layer on at least one side of the positive current collector, and a safety layer between the positive active material layer and the positive current collector. The positive active material layer includes a positive active material. The safety layer includes a binding material, a conductive material, and an overcharge-sensitive material. The overcharge-sensitive material is a polymer that includes a monosaccharide structural unit and that includes at least one of a carbonate group and a phosphate group. An average diameter x of the conductive material and a weight-average molecular weight y of the overcharge-sensitive material satisfy Formula 1.

公开(公告)号：US20210143436A1

公开(公告)日：2021-05-13

申请号：US17149736

申请日：2021-01-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yang YU

IPC: H01M4/66 ,  H01M4/62

Abstract: The present application discloses a positive electrode current collector, a positive electrode plate, an electrochemical device, and an electric equipment including the electrochemical device. The positive electrode current collector includes: a metal conductive layer; an overcharge blocking activation layer disposed on a surface of the metal conductive layer, the overcharge blocking activation layer including an overcharge blocking activation material, a binder material and a conductive material, wherein the overcharge blocking activation material includes an esterified saccharide.