公开(公告)号：US20230207938A1

公开(公告)日：2023-06-29

申请号：US18117400

申请日：2023-03-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaocong OUYANG ,  Chenghua FU ,  Miaomiao DONG ,  Yonghuang YE ,  Changfeng BIE

IPC: H01M50/204 ,  H01M4/525 ,  H01M4/505 ,  H01M10/44

CPC classification number: H01M50/204 ,  H01M4/525 ,  H01M4/505 ,  H01M10/441 ,  H01M2220/20 ,  H01M2004/028

Abstract: A battery pack may comprise a first battery cell type and a second battery cell type, wherein the first battery cell type may include n first battery cells, and the second battery cell type may include m second battery cells, with n and m being each independently selected from an integer of 1 or more. The second battery cell may have an internal resistance less than that of the first battery cell, the difference in internal resistance between the first battery cell and the second battery cell may be ≥0.15 mohm; the percentage by number of the first battery cells in the battery cells comprised in the area A may be 20% to 100%; and the percentage by number of the second battery cells in the battery cells comprised in the area B may be 5% to 100%.

公开(公告)号：US20220158246A1

公开(公告)日：2022-05-19

申请号：US17587915

申请日：2022-01-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Chenghua FU ,  Changlong HAN ,  Peipei CHEN

IPC: H01M10/0568 ,  H01M10/0525

Abstract: A lithium-ion battery and an apparatus are provided. The lithium-ion battery includes a battery housing, an electrolyte, and an electrode assembly. The lithium salt includes one or more of compounds represented by formula I, where n is an integer of 1 to 3, Rf1 and Rf2 are CmF2m+1, m is an integer of 0 to 5, Rf1 and Rf2 are the same or different, and a group margin of battery cell of the lithium-ion battery ranges from 85% to 95%. The lithium-ion battery has advantages of good cycling performance, good rate performance, high safety performance, and good low-temperature discharge performance.

公开(公告)号：US20210203000A1

公开(公告)日：2021-07-01

申请号：US17199256

申请日：2021-03-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Junmin FENG ,  Peipei CHEN ,  Chenghua FU ,  Chengdu LIANG

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567

Abstract: This application provides a lithium-ion battery, a battery module, a battery pack, and an apparatus. The lithium-ion battery includes a positive electrode plate, a negative electrode plate, a separator, and a nonaqueous electrolyte. The positive electrode plate includes Li1+xNiaCobMe(1-a-b)O2-cYc, where −0.1≤x≤0.2, 0.8≤a

公开(公告)号：US20210202999A1

公开(公告)日：2021-07-01

申请号：US17196944

申请日：2021-03-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Peipei CHEN ,  Chenghua FU ,  Junmin FENG

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M10/0525

Abstract: This application provides a nonaqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous solvent includes a nonaqueous solvent and a lithium slat. The nonaqueous solvent includes a carbonate solvent and a high oxidation potential solvent, and the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II. Based on a total weight of the nonaqueous solvent, a weight percentage of the high oxidation potential solvent is 10% to 60%. This application can not only improve electrochemical performance of the lithium-ion battery under high temperature and high voltage and improve safety performance such as overcharge safety and hot box safety of the lithium-ion battery, but also ensure that the lithium-ion battery has some kinetic performance.

公开(公告)号：US20190326637A1

公开(公告)日：2019-10-24

申请号：US16390816

申请日：2019-04-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianwei ZHU ,  Chenghua FU ,  Xiaomei WANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38

Abstract: The present disclosure relates to the technical field of lithium-ion battery, and particularly, to an electrolytic solution and a lithium-ion battery including the electrolytic solution. The electrolytic solution includes additives, and the additives include an additive A and an additive B. The additive A forms a film on the surface of the positive electrode and effectively prevents interface side reactions at the positive electrode. Comparing with the additive A, the additive B is preferentially reduced to form a film at the negative electrode, avoiding an increase in impedance and deterioration of cycling dynamic performance, etc., caused by film formation of the additive A on the negative electrode. The combination of the additive A and additive B imparts the battery with a reduced gas production, a higher capacity retention rate and a lower impedance at high temperature.