公开(公告)号：US11848412B2

公开(公告)日：2023-12-19

申请号：US17043149

申请日：2020-04-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Mianyu Xie ,  Min Zhang ,  Lei Chen ,  Xiao Chen

IPC: H01M50/178 ,  H01M50/184 ,  H01M50/105 ,  H01M50/124 ,  H01M50/133 ,  H01M50/55 ,  H01M10/0525 ,  H01M50/553 ,  H01M50/131 ,  H01M50/103 ,  H01M50/557

CPC classification number: H01M10/0525 ,  H01M50/178 ,  H01M50/184 ,  H01M50/103 ,  H01M50/105 ,  H01M50/124 ,  H01M50/131 ,  H01M50/133 ,  H01M50/55 ,  H01M50/553 ,  H01M50/557

Abstract: Provided is a secondary battery, including: an electrode assembly, a packing bag, an electrode lead and an insulation part; the electrode assembly is housed in the packing bag having a sealing part on edge, and the electrode lead is connected to the electrode assembly and passes through the sealing part. The sealing part includes a main body area, a first step area and a first transition area which are located on same side of the electrode lead along width direction, and the main body area, first transition area and first step area are successively arranged along direction approaching the electrode lead; the insulation part is wrapped around the electrode lead, and has a first portion which is located on a side of the electrode lead close to the main body area along width direction and covered by the first step area on both sides in thickness direction.

公开(公告)号：US11605816B2

公开(公告)日：2023-03-14

申请号：US17874548

申请日：2022-07-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingbu Chen ,  Xin Sun ,  Xiao Chen ,  Zhenglun Chen ,  Haotian Xie ,  Bangrun Wang ,  Geng Li

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/587 ,  H01M4/58 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/02

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode active substance layer, the positive-electrode active substance layer contains a pre-lithiation agent, and a molecular formula of the pre-lithiation agent is LixNiaCu1−a−bMbO2, where 1≤x≤2, 0

公开(公告)号：US20230369556A1

公开(公告)日：2023-11-16

申请号：US18346794

申请日：2023-07-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiao Chen ,  Guangjun Wang ,  Yonghuang Ye

IPC: H01M4/04 ,  H01M4/66 ,  H01M4/02

CPC classification number: H01M4/0404 ,  H01M4/661 ,  H01M2004/021

Abstract: Provided are a secondary battery which includes a positive electrode sheet, a negative electrode sheet, and a separator placed between the positive electrode sheet and the negative electrode sheet. In some embodiments, the positive electrode sheet includes a positive electrode current collector and positive film layers A1 and B1 respectively provided on two surfaces of the positive electrode current collector, and the negative electrode sheet includes a negative electrode current collector and negative film layers respectively provided on two surfaces of the negative electrode current collector, where capacities per unit area Cap A1 and Cap B1 of the positive film layers A1 and B1 satisfy Cap A1

公开(公告)号：US20230282824A1

公开(公告)日：2023-09-07

申请号：US18186952

申请日：2023-03-21

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Haotian Xie ,  Peipei Chen ,  Xin Sun ,  Bangrun Wang ,  Jiantao Huang ,  Xingbu Chen ,  Xiao Chen ,  Na Liu ,  Chengdu Liang

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0568 ,  H01M4/58 ,  H01M4/04 ,  H01M50/207

CPC classification number: H01M4/525 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0568 ,  H01M4/5825 ,  H01M4/0404 ,  H01M50/207 ,  H01M2004/028

Abstract: A lithium ion secondary battery and a preparation method therefor, a battery module, a battery pack, and a device are provided. In some embodiments, the lithium ion secondary battery comprises a positive electrode plate, a negative electrode plate and an electrolyte, wherein the positive electrode plate comprises a positive electrode active material and a positive electrode lithium-supplementing material comprising a lithium-rich metal oxide, and the lithium-rich metal oxide comprises one or more elements of Ni, Co, Fe, Mn, and Cu; the electrolyte comprises an electrolyte lithium salt and a solvent, and has a percentage ε of the total mass of a fluorine element in the anions of the electrolyte lithium salt relative to the total mass of the electrolyte of