公开(公告)号：US20230420677A1

公开(公告)日：2023-12-28

申请号：US18222503

申请日：2023-07-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huihui LIU ,  Lingyun FENG ,  Yanhuang FAN ,  Wenmeng ZHANG

IPC: H01M4/60 ,  H01M4/505 ,  H01M4/58 ,  H01M4/583 ,  H01M4/36 ,  H01M4/62 ,  H01M10/052

CPC classification number: H01M4/602 ,  H01M4/505 ,  H01M4/5825 ,  H01M2004/028 ,  H01M4/366 ,  H01M4/622 ,  H01M10/052 ,  H01M4/583

Abstract: The present application provides a positive electrode plate, a secondary battery and a power consuming device. The positive electrode plate may comprise a positive electrode current collector, a positive electrode film layer provided on at least one surface of the positive electrode current collector, and a conductive undercoat layer between the positive electrode current collector and the positive electrode film layer, wherein the positive electrode film layer may include a positive electrode film layer comprising a positive electrode active material with a core-shell structure, the positive electrode active material may comprise an inner core and a shell coating the inner core, and the conductive primer layer may comprise a first polymer, a first water-based binder and a first conductive agent.

公开(公告)号：US20230361273A1

公开(公告)日：2023-11-09

申请号：US18354618

申请日：2023-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huihui LIU ,  Lingyun FENG ,  Yanhuang FAN ,  Lianwei DUAN

IPC: H01M4/136 ,  H01M4/58 ,  H01M4/36 ,  H01M4/583 ,  H01M4/62

CPC classification number: H01M4/136 ,  H01M4/5825 ,  H01M4/366 ,  H01M4/583 ,  H01M4/622 ,  H01M4/625 ,  H01M2004/028

Abstract: A positive electrode plate includes a positive electrode current collector, a positive electrode film layer arranged on at least one surface of the positive electrode current collector, and a conductive undercoat layer positioned between the positive electrode current collector and the positive electrode film layer. The positive electrode film layer includes a positive electrode active material including an inner core and a shell coating the inner core. The shell includes a first coating layer coating the inner core, a second coating layer coating the first coating layer, and a third coating layer coating the second coating layer. The conductive undercoat layer includes a polymer, an aqueous binder, and a conductive agent.

公开(公告)号：US20200161640A1

公开(公告)日：2020-05-21

申请号：US16422872

申请日：2019-05-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei LI ,  Haihao SHI ,  Huihui LIU ,  Chao JIN ,  Tianyi GAO ,  Jianbao XU ,  Shisong LI ,  Chao GUO

IPC: H01M4/36 ,  H01M4/62

Abstract: The present invention relates to a battery, comprising a positive electrode plate, a separator and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and at least two layers of positive active materials on at least one surface of the positive electrode current collector in which the underlying positive active material layer in contact with the positive electrode current collector comprises a first positive active material, a first polymer material, and a first conductive material and in which the upper positive active material layer comprises a second positive active material, a second polymer material, and a second conductive material and the first polymer material comprises an oil-dispersible polymer material having a solubility in NMP at 130° C. for 5 minutes, which is 30% or less of the solubility of PVDF under the same conditions. The battery exhibits good safety performance and improved electrical performance.

公开(公告)号：US20240379964A1

公开(公告)日：2024-11-14

申请号：US18783374

申请日：2024-07-24

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng LI ,  Zipeng ZENG ,  Huihui LIU ,  Jingming WANG

IPC: H01M4/62 ,  C08F8/22 ,  C08L27/16 ,  C08L27/24 ,  H01M4/02

Abstract: This application provides a binder composition. The binder composition includes a first fluoropolymer and a second fluoropolymer, where the first fluoropolymer includes polyvinylidene fluoride with a weight-average molecular weight of 5000000-9000000, and a weight-average molecular weight of the second fluoropolymer is not greater than 600000. Featuring good processability, this binder composition, even added in small amounts, can provide electrode plates with great adhesion force and improve the cycling performance of a battery.

公开(公告)号：US20240356036A1

公开(公告)日：2024-10-24

申请号：US18746957

申请日：2024-06-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng LI ,  Zipeng ZENG ,  Huihui LIU ,  Jingming WANG

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/052

CPC classification number: H01M4/623 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/052 ,  H01M2004/028

Abstract: This application provides a binder composition. The binder composition includes a first fluoropolymer and a second fluoropolymer, where the first fluoropolymer includes polyvinylidene fluoride with a weight-average molecular weight of 1,500,000-5,000,000, and a weight-average molecular weight of the second fluoropolymer does not exceed 600,000. The binder composition has good processability, achieves high adhesion force for the electrode plate when added in small amounts, and improves the cycling performance of the battery.

公开(公告)号：US20240339611A1

公开(公告)日：2024-10-10

申请号：US18540898

申请日：2023-12-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xinghui WANG ,  Huihui LIU ,  Wenmeng ZHANG ,  Shuhua CHEN

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/62

CPC classification number: H01M4/583 ,  H01M4/0404 ,  H01M4/043 ,  H01M4/1393 ,  H01M4/622 ,  H01M4/625 ,  H01M2004/027

Abstract: The present application provides a negative electrode plate, comprising a current collector and a negative electrode film layer, wherein the negative electrode film layer comprises a negative electrode active material, a copolymer formed by acrylonitrile and acrylic acid components, and a polyol. Optionally, the negative electrode film layer further comprises a polyether. The cross-linked polymer and polyether described in the present application can reduce the rebound rate of the negative electrode plate during cycling, thereby improving the capacity retention rate of the battery.

公开(公告)号：US20240063393A1

公开(公告)日：2024-02-22

申请号：US18498969

申请日：2023-10-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng LI ,  Huihui LIU

IPC: H01M4/62 ,  H01M4/136 ,  H01M4/58 ,  H01M4/66

CPC classification number: H01M4/622 ,  H01M4/136 ,  H01M4/5825 ,  H01M4/667 ,  H01M4/668 ,  H01M4/663 ,  H01M2004/028

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack and a power consuming device are described. The positive electrode plate comprises a current collector, a primer coating layer provided on at least one surface of the current collector, and a positive electrode film provided on the primer coating layer, wherein the primer coating layer contains a polymer A soluble in an aqueous solvent, and the polymer A comprises a structural unit derived from a monomer containing a cyano group, a structural unit derived from a monomer containing an amide group, and a structure unit derived from a monomer containing an ester group. The polymer A is used in the primer coating layer of the positive electrode plate, which increases the molding quality, adhesive force and flexibility of the positive electrode plate, and optimizes the cycling performance of the battery.

公开(公告)号：US20240030451A1

公开(公告)日：2024-01-25

申请号：US18479949

申请日：2023-10-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wenmeng ZHANG ,  Huihui LIU ,  Xinghui WANG ,  Shuhua CHEN

IPC: H01M4/62

CPC classification number: H01M4/625 ,  H01M4/622 ,  H01M2004/027

Abstract: A modified binder includes a conductive carbon nanotube and a first grafting agent located on the conductive carbon nanotube. The first grafting agent includes a copolymer of acrylic-based monomer unit-acrylamide-based monomer unit and/or a copolymer of acrylic-based monomer unit-acrylonitrile-based monomer unit-acrylamide-based monomer unit.

公开(公告)号：US20220246992A1

公开(公告)日：2022-08-04

申请号：US17564537

申请日：2021-12-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Kai WU ,  Huihui LIU ,  Zhonghong LI ,  Long WANG ,  Tuo ZHENG ,  Huan CHE

IPC: H01M10/0587 ,  H01M10/0585 ,  H01M50/103 ,  H01M50/209 ,  H01M4/66 ,  H01M10/0583 ,  H01M4/38

Abstract: An embodiment of the present application provide an electrode assembly, a battery cell, a battery, and an electrode assembly manufacturing equipment and method. Among that, the electrode assembly includes a negative electrode plate and a positive electrode plate which form a bending region. The positive electrode plate includes bending portions located in the bending region, the bending portion includes a positive electrode current collecting layer and a positive active substance layer, and at least one side surface of the positive electrode current collecting layer is provided with the positive active substance layer in a thickness direction of the positive electrode plate. At least one positive active substance layer is provided with the barrier layer, at least a part of the barrier layer is intercalated in the positive active substance layer provided with the barrier layer, and coats at least a part of particles in the positive active substance layer.

公开(公告)号：US20220123444A1

公开(公告)日：2022-04-21

申请号：US17565873

申请日：2021-12-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Huihui LIU ,  Hui GU ,  Jingyu CAO ,  Lin MA

IPC: H01M50/536 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/36 ,  H01M50/543

Abstract: This application provides an electrode assembly and a battery cell. The battery cell includes an electrode assembly, a housing, and a first electrode terminal. The housing includes an accommodation cavity. The electrode assembly is accommodated in the accommodation cavity, and the first electrode terminal is disposed in the housing. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The separator separates the first electrode plate from the second electrode plate. The first electrode plate includes a first current collector, a first active material layer, and an insulation layer. The first current collector includes a first body portion and a first tab extending from the first body portion.