公开(公告)号：US20210202997A1

公开(公告)日：2021-07-01

申请号：US17189084

申请日：2021-03-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

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

Abstract: This application provides a nonaqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolyte includes a nonaqueous solvent, a lithium salt, and an additive, where the nonaqueous solvent includes a carbonate solvent and a high oxidation potential solvent, and the additive includes cyclic sulfate. The high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II, and the cyclic sulfate may be selected from one or more of compounds represented by formula III. 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：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：US20210202998A1

公开(公告)日：2021-07-01

申请号：US17196943

申请日：2021-03-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chengdu LIANG ,  Chenghua FU ,  Peipei CHEN ,  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 electrolyte includes a nonaqueous solvent, a lithium salt, and an additive. The nonaqueous solvent is a high oxidation potential solvent, and the additive includes cyclic sulfate. The high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II, and the cyclic sulfate may be selected from one or more of compounds represented by formula III. 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：US20210203001A1

公开(公告)日：2021-07-01

申请号：US17199265

申请日：2021-03-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/505 ,  H01M4/525

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, the lithium salt is a mixed lithium salt formed by LiPF6 and LiN(FSO2)2, and the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II. 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：US20210194060A1

公开(公告)日：2021-06-24

申请号：US17196797

申请日：2021-03-09

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/42

Abstract: This application provides a nonaqueous electrolyte, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolyte includes a nonaqueous solvent, a lithium salt, and an additive. The nonaqueous solvent includes a carbonate solvent and a high oxidation potential solvent, and the additive is a fluorinated cyclic carbonate. The carbonate solvent is a linear carbonate, or a mixture of linear carbonate and cyclic carbonate, the high oxidation potential solvent is selected from one or more of compounds represented by formula I and formula II, and the fluorinated cyclic carbonate is selected from compounds represented by formula III. 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：US20210111434A1

公开(公告)日：2021-04-15

申请号：US17130713

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0567

Abstract: This application provides a nonaqueous electrolytic solution, a lithium-ion battery, a battery module, a battery pack, and an apparatus. The nonaqueous electrolytic solution includes a nonaqueous solvent and a lithium salt. The nonaqueous solvent includes a carbonate solvent and a high-oxidation-potential solvent. The carbonate solvent is a chain carbonate, and the high-oxidation-potential solvent is selected from one or more of compounds denoted by Formula I and Formula II. This application improves electrochemical performance of the lithium-ion battery under a high temperature and a high voltage as well as safety performance such as overcharge safety and hot-oven safety of the lithium-ion battery, and also ensures kinetic performance of the lithium-ion battery to some extent.