公开(公告)号：US20250015273A1

公开(公告)日：2025-01-09

申请号：US18824084

申请日：2024-09-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei ZHENG ,  Baozhen WU ,  Yuwen WANG ,  Xingyan YOU ,  Wenlong BAI

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed are an electrode, a preparation method therefor, a battery, and a power consuming device. The electrode according to an embodiment of the present application comprises a current collector and active layers bonded to the current collector, wherein the active layers include a first active layer and a second active layer, the first active layer is bonded to the current collector, the second active layer is bonded to the surface of the first active layer that faces away from the current collector, and the second active layer has a porosity lager than that of the first active layer. The electrode has a high energy density and structural stability and an excellent cycling performance, resulting in a safe battery. The method for preparing an electrode as disclosed results in an electrode with a stable structure and electrochemical performance, and a high efficiency, while saving the production cost.

公开(公告)号：US20240322139A1

公开(公告)日：2024-09-26

申请号：US18679475

申请日：2024-05-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Yiyang WU ,  Wenlong BAI ,  Baozhen WU

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/133 ,  H01M4/587 ,  H01M4/62 ,  H01M10/42

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/587 ,  H01M4/628 ,  H01M10/4235 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application provides a negative electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device. The negative electrode plate includes a negative electrode current collector and a first negative electrode film, a second negative electrode film, and a functional coating sequentially disposed on at least one surface of the negative electrode current collector, wherein the functional coating layer comprises a ferroelectric material; the second negative electrode film comprises a second negative electrode active material, and the second negative electrode active material comprises hard carbon; the first negative electrode film comprises a first negative electrode active material, and the first negative electrode active material comprises graphite. The negative electrode plate provided by the present application can enable the secondary battery to have high charging rate and long cycle life on the premise of high energy density.

公开(公告)号：US20240347691A1

公开(公告)日：2024-10-17

申请号：US18752840

申请日：2024-06-25

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingyan YOU ,  Yiyang WU ,  Wenlong BAI ,  Baozhen WU

IPC: H01M4/133 ,  H01M4/02 ,  H01M4/36 ,  H01M4/587 ,  H01M50/429 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489

CPC classification number: H01M4/133 ,  H01M4/366 ,  H01M4/587 ,  H01M50/429 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: An electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator located between the negative electrode plate and the positive electrode plate, where the negative electrode plate includes a negative electrode current collector, and a first negative electrode film layer and a second negative electrode film layer disposed on at least one surface of the negative electrode current collector; the first negative electrode film layer is located between the negative electrode current collector and the second negative electrode film layer and includes a first negative electrode active material, the first negative electrode active material includes graphite, the second negative electrode film layer includes a second negative electrode active material, and the second negative electrode active material includes hard carbon; and the separator includes a base film and a functional coating located at least on a side, against the negative electrode plate, of the base film.