公开(公告)号：US20240279068A1

公开(公告)日：2024-08-22

申请号：US18639719

申请日：2024-04-18

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xieji LIN ,  Rui SHEN ,  Libing HE

IPC: C01B32/205

CPC classification number: C01B32/205 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40

Abstract: A preparation method of an artificial graphite includes heat-treating a graphite raw material to obtain artificial graphite, where an ambient atmosphere of the heat treatment is a mixed gas including a gas that is at least one of oxygen or water vapor and including a chemically inert gas, and, during the heat treatment, the graphite raw material is in a motion state.

公开(公告)号：US20240274818A1

公开(公告)日：2024-08-15

申请号：US18636281

申请日：2024-04-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun MA ,  Rui SHEN ,  Libing HE ,  Bao Jian ZHU ,  Lei CHEN

IPC: H01M4/587 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M10/0525

CPC classification number: H01M4/587 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

Abstract: This application discloses a secondary battery including a positive electrode plate and a negative electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode film disposed on a surface of the positive electrode current collector and comprising a positive active material, the negative electrode plate comprises a negative electrode current collector and a negative electrode film disposed on a surface of the negative electrode current collector and comprising a negative active material. The positive active material comprises one or more of lithium-containing phosphates with olivine structure and modified compounds thereof, and a resistance R of the negative electrode plate satisfies: 3.0 mΩ≤R≤7.0 mΩ.

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：US20220093925A1

公开(公告)日：2022-03-24

申请号：US17542533

申请日：2021-12-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Rui SHEN ,  Jianjun MA ,  Libing HE

IPC: H01M4/587 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/58

Abstract: This application discloses a secondary battery and an apparatus containing the secondary batteries. The secondary battery includes a positive electrode plate and a negative electrode plate, the positive electrode plate comprising a positive electrode current collector and a positive electrode film comprising a positive active material; the negative electrode plate comprising a negative electrode current collector and a negative electrode film comprising a negative electrode active material, wherein the positive active material comprises one or more of layered lithium transition metal oxides and modified compounds thereof, the negative electrode active material comprises artificial graphite and natural graphite, and the negative electrode plate satisfies 0.02≤I3R(012)/I2H(100)≤0.18, alternatively the positive active material comprises one or more of lithium-containing phosphates with olivine structure and modified compounds thereof, the negative electrode active material includes artificial graphite and natural graphite, and the negative electrode plate satisfies 0.04≤I3R(012)/I2H(100)≤0.22.

公开(公告)号：US20180062167A1

公开(公告)日：2018-03-01

申请号：US15662139

申请日：2017-07-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

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

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/48 ,  H01M4/62

CPC classification number: H01M4/366 ,  C01B32/05 ,  C01B33/18 ,  C01P2004/61 ,  H01M4/48 ,  H01M4/483 ,  H01M4/587 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: The present application relates to the field of secondary batteries and, particularly, relates to a negative electrode material for the secondary battery, a method for preparing the same, and a secondary battery containing the same. The negative electrode material includes a kernel particle, a connection carbon layer, a conductive carbon microparticle, the connection carbon layer is coated on a surface of the kernel particle, and the conductive carbon microparticle is distributed on a surface of the connection carbon layer. A high-molecular polymer is used as binder. A layer of conductive carbon microparticle is uniformly coated on a surface of the negative electrode active material, so that a stable and effective conductive network is formed in the electrode plate, thereby significantly improving a dynamic performance of the negative electrode material and providing a battery containing the negative electrode material with high rate performance and fast charging capability.

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：US20230183073A1

公开(公告)日：2023-06-15

申请号：US17942080

申请日：2022-09-09

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zilong SONG ,  Rui SHEN ,  Libing HE

IPC: C01B32/205 ,  H01M10/052

CPC classification number: C01B32/205 ,  H01M10/052 ,  C01P2004/53 ,  C01P2004/61

Abstract: A method for preparing a modified graphite includes performing crushing on coal-based needle coke to obtain a first material, performing shaping fine powder removal on the first material to obtain a second material, performing heat treatment on the second material in a reaction kettle and then cooling the second material after the heat treatment to room temperature to obtain a third material, and performing graphitization on the third material in a graphitization furnace and then cooling the third material after the graphitization to room temperature to obtain the modified graphite.

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%.