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：US20240372126A1

公开(公告)日：2024-11-07

申请号：US18776806

申请日：2024-07-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/04 ,  H01M4/02 ,  H01M4/04 ,  H01M4/139 ,  H01M10/0525 ,  H01M10/0587

Abstract: This application relates to an electrode assembly, and a winding device and manufacturing method thereof, a battery cell, a battery, and an electric apparatus, and pertains to the field of battery manufacturing technologies. This application proposes an electrode assembly including a positive electrode plate, where a bending region is formed after the positive electrode plate is wound; and the positive electrode plate includes a positive electrode current collector and a positive electrode active substance layer disposed on a surface of the positive electrode current collector, where the positive electrode active substance layer includes an inactive region, and at least part of the inactive region is located in the bending region. This application further proposes a winding device and a manufacturing method of electrode assembly, so as to shape the electrode assembly. This application further proposes a battery cell, a battery, and an electric apparatus that include the electrode assembly.

公开(公告)号：US20240186928A1

公开(公告)日：2024-06-06

申请号：US18439048

申请日：2024-02-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian HUANG ,  Zhimin DAN ,  Chenghua FU ,  Wei CHEN

IPC: H02P21/22 ,  B60L58/27 ,  H02P27/08

CPC classification number: H02P21/22 ,  B60L58/27 ,  H02P27/08 ,  B60L2240/545

Abstract: A control method for a battery heating system. The battery heating system includes an inverter and a motor winding, and the inverter is connected to the motor winding and a battery. The control method includes acquiring a target voltage vector required for motor operation; and controlling, according to the target voltage vector, the motor winding to output a pulse current to the battery through the inverter.

公开(公告)号：US20240097294A1

公开(公告)日：2024-03-21

申请号：US18521127

申请日：2023-11-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M50/586 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0583 ,  H01M10/0587 ,  H01M50/59

CPC classification number: H01M50/586 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0583 ,  H01M10/0587 ,  H01M50/59 ,  H01M2004/028

Abstract: A cathode plate and a battery are described. The cathode plate includes: a main body with a cuboid shape, which is formed by stacking a cathode active material layer and a cathode current collector in a first direction and has four side faces and two end faces facing each other in the first direction, and the four side faces being a first side face to a fourth side face; a cathode tab, formed by the cathode current collector extending from the first side face to an outside of the main body; and an insulating layer, formed on and covering 95% or more of the second side face to the fourth side face.

公开(公告)号：US20230378799A1

公开(公告)日：2023-11-23

申请号：US18361906

申请日：2023-07-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chenghua FU ,  Shaocong OUYANG ,  Baoyun XU ,  Xiaojian HUANG ,  Yonghuang YE ,  Wenjian MA

IPC: H02J7/02 ,  H02J7/00

CPC classification number: H02J7/02 ,  H02J7/0048

Abstract: A charge method includes obtaining a temperature of a battery, and in response to the temperature of the battery being lower than a preset temperature threshold, determining to use a first charge current to charge the battery until the battery meets a preset condition, and then determining to use a second charge current to charge the battery. The first charge current is used for heating the battery during charging, and the first charge current is greater than the second charge current.

公开(公告)号：US20230216062A1

公开(公告)日：2023-07-06

申请号：US18181830

申请日：2023-03-10

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/70 ,  H01M4/04 ,  H01M4/62

CPC classification number: H01M4/70 ,  H01M4/62 ,  H01M4/0404

Abstract: An electrode assembly includes a first electrode plate and a second electrode plate. The first electrode plate includes a first current collector and a first active material layer, where the first current collector includes a first body portion and a first tab, the first active material layer is applied on a surface of the first body portion, and the first tab extends from an end of the first body portion in a first direction. The second electrode plate includes a second current collector and a second active material layer, where the second current collector includes a second body portion and a second tab, the second active material layer is applied on a surface of the second body portion, and the second tab extends from an end of the second body portion in the first direction.

公开(公告)号：US20230124276A1

公开(公告)日：2023-04-20

申请号：US18063405

申请日：2022-12-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M10/0587

Abstract: A lithium-ion battery includes a wound structure formed by winding a negative electrode plate, a separator, and a positive electrode plate in a winding direction. The wound structure includes an arc-shaped bending part. The negative electrode plate includes a negative electrode material layer. An insulation layer and a reaction layer are located on a surface of the insulation layer are provided on a surface of the negative electrode material layer in the bending part. The reaction layer includes a lithium storage material.

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：US20240213620A1

公开(公告)日：2024-06-27

申请号：US18599498

申请日：2024-03-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Suogang GUO ,  Chenghua FU ,  Wen CHANG ,  Yonghuang YE

IPC: H01M50/449 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/46

CPC classification number: H01M50/449 ,  H01M10/0587 ,  H01M50/46 ,  H01M10/0525

Abstract: Provided are an electrode assembly, a battery cell, a battery, and an electric apparatus. The electrode assembly comprises a positive electrode plate, a negative electrode plate, and a separation assembly, and the separation assembly is configured to separate the positive electrode plate from the negative electrode plate. At least part of the separation assembly is provided as a multi-layer structure area, and at least part of the multi-layer structure area is located between the positive electrode plate and negative electrode plate adjacent to each other.

公开(公告)号：US20230327209A1

公开(公告)日：2023-10-12

申请号：US18208898

申请日：2023-06-13

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Bin JIANG ,  Changlong HAN ,  Chenghua FU ,  Rui SHEN ,  Yuanyuan LI

IPC: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567

CPC classification number: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M2004/021

Abstract: The present application provides a secondary battery, an electrolyte, and an apparatus including the secondary battery. The secondary battery of the present application includes an electrolyte, characterized in that the electrolyte includes an organic solvent, and the organic solvent includes a cyclic carbonate and a chain carbonate; the mass ratio of the cyclic carbonate and the chain carbonate is from 25:75 to 32:68; the chain carbonate includes dimethyl carbonate; the mass percentage of the dimethyl carbonate in the chain carbonate is greater than or equal to 9 wt % and less than 50 wt %; wherein based on the total mass of the organic solvent, the mass percentage of a carboxylic acid ester is less than 5 wt %. The secondary battery of the present application can simultaneously obtain excellent low-temperature power, long service life and cycle performance.