公开(公告)号：US12062783B2

公开(公告)日：2024-08-13

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 ,  H01M4/02 ,  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：US20230307616A1

公开(公告)日：2023-09-28

申请号：US18314828

申请日：2023-05-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jichun Huang ,  Yanying Wu ,  Xinghui Wang

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/58

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/5825 ,  H01M2004/028

Abstract: A positive electrode plate, a secondary battery comprising the positive electrode plate, as well as a battery module, a battery pack, and a power consuming device are provided. The positive electrode plate of the present invention comprises: a positive current collector and a positive film layer comprising a first positive film layer and a second positive film layer, wherein the first positive film layer is disposed on at least one surface of the positive current collector and comprises a first positive active material comprising a hollow particle material, and the second positive film layer is disposed on the first positive film layer and comprises a second positive active material comprising a solid particle material.