公开(公告)号：US20230361284A1

公开(公告)日：2023-11-09

申请号：US18351998

申请日：2023-07-13

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Ji ,  Baiqing Li

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/587

CPC classification number: H01M4/366 ,  H01M4/5825 ,  H01M4/587 ,  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 include a positive electrode current collector and positive electrode film layers having a single-layer or multi-layer structure. When the positive electrode film layers have a single-layer structure, at least one of the positive electrode film layers comprises a first positive electrode active material and a second positive electrode active material; and/or when the positive electrode film layers have a multi-layer structure, at least one layer of the at least one of the positive electrode film layers comprises the first and second positive electrode active materials; the first positive electrode active material comprises an inner core Li1+xMn1-yAyP1-zRzO4, a first coating layer comprising crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)c, a second coating layer comprising crystalline phosphate XPO4, and a third coating layer; and the third coating layer is carbon.

公开(公告)号：US20230238540A1

公开(公告)日：2023-07-27

申请号：US18194658

申请日：2023-04-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Baiqing Li ,  Cheng Ji ,  Haizu Jin ,  Kai Wu

IPC: H01M4/62 ,  H01M50/538 ,  H01M50/103

CPC classification number: H01M4/628 ,  H01M50/538 ,  H01M50/103 ,  H01M2004/028

Abstract: An electrode assembly, a battery cell, a battery, and a method and device for manufacturing an electrode assembly are provided. In some embodiments, the electrode assembly includes a positive electrode plate and a negative electrode plate. The positive electrode plate and the negative electrode plate are wound or folded to form a bend region. The positive electrode plate includes a plurality of bend portions located in the bend region. Each bend portion includes a positive current collecting layer and a positive active material layer. The positive current collecting layer is coated with the positive active material layer on at least one surface in a thickness direction of the positive electrode plate. A barrier layer is disposed between the positive current collecting layer and the positive active material layer.

公开(公告)号：US20230352667A1

公开(公告)日：2023-11-02

申请号：US18350756

申请日：2023-07-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Cheng Ji ,  Baiqing Li

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

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

Abstract: A positive electrode plate, a secondary battery, a battery module, a battery pack and a power consuming device are provided. In some embodiments, the positive electrode plate comprises a positive electrode current collector and a positive electrode film layer having a single-layer or multi-layer structure provided on at least surface of the positive electrode current collector; when the positive electrode film layer has a single-layer structure, at least one of the positive electrode film layers contains both a first positive electrode active material with a chemical formula of LiaAxMn1-yRyP1-zCzO4-nDn and a second positive electrode active material selected from LiFePO4, carbon-coated LiFePO4, LiFebMcPO4 and carbon-coated LiFebMcPO4; and/or when the positive electrode film layer has a multi-layer structure, at least one of the positive electrode film layers contains both a first positive electrode active material and a second positive electrode active material.