公开(公告)号：US20230335722A1

公开(公告)日：2023-10-19

申请号：US18331246

申请日：2023-06-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jingjing PU ,  Yanying WU ,  Xinghui WANG

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M50/209 ,  H01M50/249

CPC classification number: H01M4/366 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M50/209 ,  H01M50/249 ,  H01M2004/028

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive electrode plate includes a positive current collector, and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a first active material layer and a second active material layer that are sequentially stacked in a direction away from the surface. The first active material layer includes a first composite particle. The first composite particle includes a first lithium iron phosphate particle and a first carbon layer that coats a surface of the first lithium iron phosphate particle. The second active material layer includes a second composite particle. The second composite particle includes a second lithium iron phosphate particle and a second carbon layer that coats a surface of the second lithium iron phosphate particle.

公开(公告)号：US20240356014A1

公开(公告)日：2024-10-24

申请号：US18760121

申请日：2024-07-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jingjing PU ,  Yanying WU ,  Xinghui WANG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M50/209 ,  H01M50/249

CPC classification number: H01M4/366 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M50/209 ,  H01M50/249 ,  H01M2004/028 ,  H01M2220/20

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The positive electrode plate includes a positive current collector, and a positive active material layer disposed on at least one surface of the positive current collector. The positive active material layer includes a first active material layer and a second active material layer that are sequentially stacked in a direction away from the surface. The first active material layer includes a first composite particle. The first composite particle includes a first lithium iron phosphate particle and a first carbon layer that coats a surface of the first lithium iron phosphate particle. The second active material layer includes a second composite particle. The second composite particle includes a second lithium iron phosphate particle and a second carbon layer that coats a surface of the second lithium iron phosphate particle.

公开(公告)号：US20240207915A1

公开(公告)日：2024-06-27

申请号：US18601998

申请日：2024-03-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xuyong LIU ,  Jingjing PU ,  Hongwu SHANG ,  Shisong LI ,  Shengwu ZHANG

IPC: B21D1/02 ,  B21D37/04 ,  H01M4/04

CPC classification number: B21D1/02 ,  B21D37/04 ,  H01M4/0435

Abstract: A flattening device includes a main roller and a plurality of sleeves. The plurality of sleeves are sleeved on the main roller at intervals in an axial direction of the main roller. At least one of the sleeves is detachably connected to the main roller, so that positions of the sleeves in the axial direction of the main roller are adjustable, and the sleeves are in contact with the electrode plate to flatten the electrode plate when the electrode plate passes through the sleeves.