公开(公告)号：US20230317933A1

公开(公告)日：2023-10-05

申请号：US18331696

申请日：2023-06-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baoyun XU ,  Shaocong OUYANG ,  Chenghua FU

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M4/133 ,  H01M4/38 ,  H01M4/134

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M4/625 ,  H01M4/133 ,  H01M4/386 ,  H01M4/134 ,  H01M2004/028

Abstract: A positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer coated on at least one surface of the positive electrode current collector. The positive electrode active material layer includes an inner active material layer and an outer active material layer successively stacked. The inner active material layer has a three-level pore size distribution: an inner primary pore size distribution from 3 nm to 10 nm, an inner secondary pore size distribution from 10 nm to 100 nm, and an inner tertiary pore size distribution from 0.1 μm to 2 μm. The outer active material layer has a three-level pore size distribution: an outer primary pore size distribution from 0.5 nm to 3 nm, an outer secondary pore size distribution from 10 nm to 100 nm, and an outer tertiary pore size distribution from 0.1 μm to 2 μm.

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：US20240363858A1

公开(公告)日：2024-10-31

申请号：US18767006

申请日：2024-07-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Miaomiao DONG ,  Shaocong OUYANG ,  Changfeng BIE ,  Hongyu LIU ,  Huan NI ,  Chenghua FU ,  Xin SUN

IPC: H01M4/58 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M4/60 ,  H01M10/0525

CPC classification number: H01M4/5825 ,  H01M4/364 ,  H01M4/366 ,  H01M4/382 ,  H01M4/60 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028

Abstract: The present application provides a secondary battery, a battery module, a battery pack, and an electrical device. The secondary battery includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate, in which the positive electrode plate comprises a positive electrode coating containing a positive electrode active material comprising a lithium iron phosphate material and a conjugated carbonyl compound. In a discharge process of the secondary battery, in addition to a discharge plateau of the lithium iron phosphate material, a discharge curve further includes a relatively low discharge plateau provided by the conjugated carbonyl compound.

公开(公告)号：US20240266548A1

公开(公告)日：2024-08-08

申请号：US18634227

申请日：2024-04-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Wen CHANG ,  Chenghua FU ,  Suogang Guo ,  Yonghuang Ye ,  Chang Zhu ,  Wenge Han ,  Yan Zhang

IPC: H01M4/66 ,  H01M4/02 ,  H01M4/13 ,  H01M10/0583 ,  H01M10/0585

CPC classification number: H01M4/667 ,  H01M4/13 ,  H01M4/661 ,  H01M10/0583 ,  H01M10/0585 ,  H01M2004/027 ,  H01M2004/028

Abstract: This application discloses an electrode plate, an electrode assembly, a battery cell, a battery, and an electrical device. The electrode plate includes: a current collector, where the current collector includes a base film layer and metal layers, and the metal layers are disposed on the base film layer in a spaced-apart manner; and active material layers, where the active material layers are applied to the base film layer in a spaced-apart manner. Each active material layer at least partially covers a corresponding metal layer.

公开(公告)号：US20230387380A1

公开(公告)日：2023-11-30

申请号：US18147201

申请日：2022-12-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Suogang GUO ,  Chenghua FU ,  Chenchen ZHANG ,  Yonghuang YE

IPC: H01M4/133 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/133 ,  H01M4/366 ,  H01M4/628 ,  H01M2004/027

Abstract: A secondary battery includes a positive electrode plate and a negative electrode plate. The negative electrode plate includes a negative electrode current collector, a negative electrode active material layer provided on at least one surface of the negative electrode current collector, and an insulation layer and a reaction layer sequentially provided on a surface of the negative electrode active material layer on a side opposite to the negative electrode current collector. The reaction layer includes at least one of graphite, silicon, silicon oxide, silicon suboxide, tin oxide, copper oxide, or zinc oxide. A capacity per unit area, A1 (mAh/cm2), of a positive electrode active material layer in the positive electrode plate and a capacity per unit area, B1 (mAh/cm2), of the negative electrode active material layer in the negative electrode plate satisfy B1/A1

公开(公告)号：US20230361429A1

公开(公告)日：2023-11-09

申请号：US18353679

申请日：2023-07-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Suogang GUO ,  Chenghua FU ,  Yonghuang YE ,  Chenchen ZHANG ,  Wen CHANG ,  Chang ZHU

IPC: H01M50/449 ,  H01M50/491 ,  H01M50/466 ,  H01M10/0587

CPC classification number: H01M50/449 ,  H01M50/491 ,  H01M50/466 ,  H01M10/0587 ,  H01M10/0525

Abstract: An electrode assembly includes a first electrode sheet, a second electrode sheet, and a first separator. The first electrode sheet and second electrode sheet are of opposite polarities, the first separator is configured to separate the first electrode sheet and the second electrode sheet. The first electrode sheet, the second electrode sheet, and the first separator are wound in a winding direction. The electrode assembly has a bending region. The bending region is provided with a second separator that is laminated with the first separator and configured to separate the first electrode sheet and the second electrode sheet adjacent to each other. At least part of ions deintercalated from the first electrode sheet are able to pass through the first separator and the second separator and be intercalated in the second electrode sheet.

公开(公告)号：US20230129961A1

公开(公告)日：2023-04-27

申请号：US17985941

申请日：2022-11-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baoyun XU ,  Shaocong OUYANG ,  Chenghua FU

IPC: H01M50/204 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/485 ,  H01M10/42

Abstract: The battery pack may include a battery pack case and battery cells accommodated in the battery pack case. In each of the first battery cell, the second battery cells, and the third battery cells, when the sum of a discharge capacity corresponding to the first discharge voltage plateau and a discharge capacity corresponding to the second discharge voltage plateau is 100%, a percentage of the discharge capacity corresponding to the second discharge voltage plateau of the third battery cells may be larger than a percentage of the discharge capacity corresponding to the second discharge voltage plateau of the second battery cells, which may be larger than a percentage of the discharge capacity corresponding to the second discharge voltage plateau of the first battery cell.

公开(公告)号：US20220384800A1

公开(公告)日：2022-12-01

申请号：US17864483

申请日：2022-07-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shaocong OUYANG ,  Chenghua FU ,  Tingzhen XIE ,  Bo WANG

IPC: H01M4/505 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/525

Abstract: A lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer as a “barrier layer” and a “functional layer” are described. The cladding layer can not only “prevent” the transition metal ions which have been produced by the lithium manganate matrix from directly “running” into the electrolyte solution, but also “prevent” the hydrofluoric acid in the electrolyte solution from directly contacting with the lithium manganate substrate, and then prevent the lithium manganate matrix from dissolving out more transition metal manganese ions; as a “functional layer”, the cladding layer contains various effective ingredients inside, which can reduce the transition metal manganese ions already present inside the battery through chemical reactions or adsorption effects, thus slowing down the generation of transition metal manganese and the decomposition of the SEI film (solid electrolyte interphase film) catalyzed by the transition metal manganese.

公开(公告)号：US20220037697A1

公开(公告)日：2022-02-03

申请号：US17506142

申请日：2021-10-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zeli WU ,  Changlong HAN ,  Chenghua FU

IPC: H01M10/0567 ,  H01M10/0569 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  C07D307/60 ,  C07D309/32 ,  C07D313/04 ,  C07F9/09

Abstract: This application provides a secondary battery and a device comprising the same. The secondary battery includes a negative electrode plate and an electrolyte. The negative electrode plate includes a negative electrode active material. The electrolyte includes an electrolyte salt, an organic solvent, and an additive. The negative electrode active material includes a silicon-based material. The organic solvent includes ethylene carbonate (EC) and diethyl carbonate (DEC). A mass ratio of EC in the organic solvent is less than or equal to 20%, and a mass ratio of DEC in the organic solvent is less than or equal to 20%. The additive includes an additive A and an additive B. The additive A is selected from one or more of compounds represented by Formula 1 or Formula 2, and the additive B is selected from one or more of compounds represented by Formula 3, as described in the application.