公开(公告)号：US11735775B2

公开(公告)日：2023-08-22

申请号：US17402672

申请日：2021-08-16

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 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0567 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/0037

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.

公开(公告)号：US20230127431A1

公开(公告)日：2023-04-27

申请号：US17969120

申请日：2022-10-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baoyun Xu ,  Shaocong Ouyang ,  Chenghua Fu

IPC: H01M4/36 ,  H01M50/204 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/485 ,  H01M10/42

Abstract: A battery pack may include a battery pack case and battery cells accommodated in the battery pack case, where an inner space of the battery pack case may include a first area and a second area, a first battery cell may be provided in the first area, second battery cells may be provided in the second area, and the second battery cells may be arranged around the first battery cell; the first battery cell and the second battery cells each may have a first discharge voltage plateau and a second discharge voltage plateau, and an average discharge voltage in the first discharge voltage plateau may be higher than an average discharge voltage in the second discharge voltage plateau.

公开(公告)号：US20230006202A1

公开(公告)日：2023-01-05

申请号：US17821819

申请日：2022-08-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shaocong Ouyang ,  Chenghua Fu ,  Tingzhen Xie ,  Dong Pan ,  Yonghuang Ye

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

Abstract: The present disclosure provides a lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer, where the cladding layer comprises an organic bonding material, one or more A-type salts, and one or more B-type salts. The lithium manganate positive electrode active material of the present disclosure significantly reduces the content of transition metal manganese ions within a battery through combined action of the organic bonding material, the A-type salts, and the B-type salts, thereby slowing down the decomposition and consumption of the SEI film (solid electrolyte interphase) by transition metal manganese, and improving the capacity retention rate and impedance performance of the battery.

公开(公告)号：US20220123368A1

公开(公告)日：2022-04-21

申请号：US17566699

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Chengdu Liang ,  Peipei Chen ,  Chenghua Fu ,  Chang Peng

IPC: H01M10/0569 ,  H01M10/0567 ,  H01M4/60

Abstract: The present application relates to a secondary battery, comprising: a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and an electrolyte solution, the negative electrode plate including a negative electrode current collector and a negative electrode active material layer provided on at least one side of the negative electrode current collector, and the electrolyte solution including an organic solvent and a lithium salt, wherein the negative electrode active material comprises a core structure and a polymer network coating layer coated on at least a part of the surface of the core structure.

公开(公告)号：US20190355983A1

公开(公告)日：2019-11-21

申请号：US16415043

申请日：2019-05-17

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Ming Zhang ,  Hao Zhang ,  Cuiping Zhang ,  Changlong Han ,  Chenghua Fu

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/485 ,  H01M4/60 ,  H01M10/0525

Abstract: The present disclosure provides a lithium ion battery including a positive electrode plate, a negative electrode plate, a separator, and an electrolyte. The positive electrode plate includes a positive electrode current collector, and a positive electrode film disposed on a surface of the positive electrode current collector and containing a positive electrode active material. The positive electrode active material includes a matrix, a first coating layer on the matrix in form of discrete islands, and a second coating layer on the first coating layer and the matrix as a continuous layer. The electrolyte includes an additive A and an additive B. The additive A is selected from a group consisting of cyclic sulfate compounds represented by Formula 1 and Formula 2, and combinations thereof, and the additive B is one or two selected from lithium difluorobisoxalate phosphate and lithium tetrafluorooxalate phosphate.

公开(公告)号：US12107227B2

公开(公告)日：2024-10-01

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 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/4235 ,  H01M2004/028 ,  H01M4/505 ,  H01M4/525 ,  H01M2300/0037 ,  H01M2300/004

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：US20240290944A1

公开(公告)日：2024-08-29

申请号：US18648388

申请日：2024-04-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Miaomiao Dong ,  Changfeng Bie ,  Shaocong Ouyang ,  Huan Ni ,  Hongyu Liu ,  Xin Sun ,  Chenghua Fu

IPC: H01M4/136 ,  H01M4/02 ,  H01M4/58 ,  H01M4/62 ,  H01M50/204 ,  H01M50/244

CPC classification number: H01M4/136 ,  H01M4/5825 ,  H01M4/62 ,  H01M50/204 ,  H01M50/244 ,  H01M2004/028

Abstract: Provided is a battery pack. The battery pack includes a first battery cell, a second battery cell, and a third battery cell. A positive electrode active substance of each battery cell is composed of lithium iron phosphate and a low-temperature additive. The low-temperature additive is selected from compounds containing at least two carbonyl groups, which are conjugated with an unsaturated structure or an atom having lone-pair electrons connected with the carbonyl groups. At a temperature lower than or equal to 10° C., a ratio of a discharging capacity of a single cell of the second battery cell to a discharging capacity of a single cell of the first battery cell ranges from 1.003 to 1.12, and a ratio of a discharging capacity of a single cell of the third battery cell to a discharging capacity of a single cell of the second battery cell ranges from 1.005 to 1.15.

公开(公告)号：US11949073B2

公开(公告)日：2024-04-02

申请号：US17132591

申请日：2020-12-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Peipei Chen ,  Chenghua Fu ,  Junmin Feng ,  Chengdu Liang

IPC: H01M10/00 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M50/40 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M50/40 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2300/004

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 mixture of a cyclic carbonate and 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.

公开(公告)号：US11901575B2

公开(公告)日：2024-02-13

申请号：US18465172

申请日：2023-09-12

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tingzhen Xie ,  Shaocong Ouyang ,  Chenghua Fu ,  Baoyun Xu ,  Yunmei Lin

IPC: H01M50/267 ,  H01M50/209 ,  H01M50/233 ,  H01M4/131 ,  H01M4/134 ,  H01M4/02

CPC classification number: H01M50/267 ,  H01M4/131 ,  H01M4/134 ,  H01M50/209 ,  H01M50/233 ,  H01M2004/028 ,  H01M2200/105 ,  H01M2220/20

Abstract: Provided are a battery pack and a power consuming device. The battery pack includes a battery pack case and a plurality of battery cells accommodated in the battery pack case. An inner space of the battery pack case may be divided into a first region located at the center and a second region enclosing the first region. The plurality of battery cells include: at least one first battery cell disposed in the first region; and at least one second battery cell disposed in the second region. An internal resistance of the first battery cell and an internal resistance of the second battery cell increase with the decrease of a temperature.

公开(公告)号：US11901511B2

公开(公告)日：2024-02-13

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 ,  H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2220/20 ,  H01M2300/0037

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.