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.

公开(公告)号：US20210313575A1

公开(公告)日：2021-10-07

申请号：US17345201

申请日：2021-06-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Rui SHEN ,  Libing HE ,  Yuanyuan LI

IPC: H01M4/587 ,  H01M4/133 ,  C01B32/205

Abstract: The present application discloses a secondary battery comprising a negative electrode plate, an apparatus including the secondary battery, an artificial graphite and a preparation method thereof, the negative electrode plate comprising a negative active material, wherein the negative active material comprises an artificial graphite having a volume average particle size Dv50 of 12 μm to 22 μm, and satisfying: 12≤Dv50×SSA≤25, in which SSA is the specific surface area of artificial graphite, in m2/g; the negative electrode plate has a compaction density of 1.6 g/cm3 to 1.75 g/cm3 and an OI value of at most 15, wherein the OI value represents a ratio C004/C110, in which C004 is the peak area of the diffraction peak of 004 crystal plane of artificial graphite in the negative electrode plate and C110 is the peak area of the diffraction peak of 110 crystal plane of artificial graphite in the negative electrode plate.

公开(公告)号：US20240363864A1

公开(公告)日：2024-10-31

申请号：US18769457

申请日：2024-07-11

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuanyuan LI ,  Jianjun MA ,  Rui SHEN ,  Libing HE

IPC: H01M4/587 ,  C01B32/205 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/587 ,  C01B32/205 ,  H01M10/0525 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: The present application discloses a secondary battery, an apparatus including the secondary battery, artificial graphite and a method for the preparation thereof. The secondary battery includes a negative electrode plate including a negative active material, wherein the negative active material includes an artificial graphite having a numerical particle size Dn10 of at least 1 μm; the artificial graphite has a graphitization degree of 90% to 95%; and the negative electrode plate has an OI value of at most 15, wherein the OI value of the negative electrode plate represents a ratio C004/C110, in which C004 is the peak area of the diffraction peak of 004 crystal plane of the artificial graphite in the negative electrode plate and C110 is the peak area of the diffraction peak of 110 crystal plane of the artificial graphite in the negative electrode plate.

公开(公告)号：US20230098119A1

公开(公告)日：2023-03-30

申请号：US17959188

申请日：2022-10-03

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuanyuan LI ,  Rui SHEN ,  Libing HE

IPC: H01M4/583 ,  H01M10/0525 ,  H01M4/04

Abstract: This application provides a negative electrode plate, including an active layer 1 and an active layer 2. The active layer 1 contains an active material 1, and the active layer 2 contains an active material 2. A powder OI value of the active material 1 falls in a range of 8 to 32, and a powder OI value of the active material 2 falls in a range of 2 to 7. A gram capacity of the active material 1 falls in a range of 290 to 350 mAh/g, and a gram capacity of the active material 2 falls in a range of 350 to 368 mAh/g. A ratio α of the powder OI value between the active material 1 and the active material 2 falls in a range of 2.00 to 6.25.

公开(公告)号：US20230087876A1

公开(公告)日：2023-03-23

申请号：US18051008

申请日：2022-10-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuanyuan LI ,  Rui SHEN ,  Libing HE

IPC: H01M4/583 ,  H01M4/04 ,  H01M10/0525

Abstract: A composite artificial graphite includes a first graphite and a second graphite. The first graphite includes secondary particles and has a graphite interlayer spacing d002 of 0.33560 nm to 0.33610 nm. The second graphite includes primary particles and has a graphite interlayer spacing d002 of 0.33620 nm to 0.33670 nm. A mass percentage of the first graphite in the composite artificial graphite is 40% to 90%.