公开(公告)号：US20220102723A1

公开(公告)日：2022-03-31

申请号：US17544964

申请日：2021-12-08

Applicant: Contemporary Amperex Technology Co. Limited

Inventor： Jianjun MA ,  Rui Shen ,  Libing He ,  Lei Chen ,  Baojian Zhu

IPC: H01M4/583 ,  H01M10/052 ,  H01M4/36 ,  H01M4/485 ,  H01M4/133 ,  H01M4/131

Abstract: This application discloses a secondary battery and an apparatus containing the secondary battery. The secondary battery comprises a positive electrode plate comprising a positive active material and a negative electrode plate comprising a negative active material. The negative active material comprises a first material and a second material, the first material comprises artificial graphite, and the second material comprises natural graphite. The positive active material comprises one or more of layered lithium transition metal oxides and modified compounds thereof, and a smoothness L of a surface of the negative electrode film away from the negative electrode current collector satisfies: 40≤L≤50; or the positive active material comprises one or more of lithium-containing phosphates with olivine structure and modified compounds thereof, and a smoothness L of a surface of the negative electrode film away from the negative electrode current collector satisfies: 45≤L≤55.

公开(公告)号：US20220102700A1

公开(公告)日：2022-03-31

申请号：US17547243

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun MA ,  Libing He ,  Rui Shen

IPC: H01M4/133 ,  H01M4/1393 ,  H01M4/587 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0585

Abstract: This application discloses a secondary battery, and a battery module, a battery pack and an apparatus containing the secondary battery. The secondary battery has a positive and negative electrodes having specific positive and negative active materials respectively, such that the secondary battery may have improved dynamic performance and at the same time have better cycle performance at high temperature and safety performance.

公开(公告)号：US20210135200A1

公开(公告)日：2021-05-06

申请号：US17051187

申请日：2019-10-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun MA ,  Libing HE

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0525

Abstract: This application provides a negative electrode plate, a secondary battery, a battery module, a battery pack, and an apparatus. The negative electrode plate includes a negative current collector and a plurality of active substance layers on the negative current collector. The plurality of active substance layers include at least a first active substance layer and a second active substance layer. The first active substance layer includes a first negative active substance, and the second active substance layer includes a second negative active substance. A ratio of gram capacity of the negative active substance of the first active substance layer to thickness of the first active substance layer is 3.5-10.0. A ratio of gram capacity of the negative active substance of the second active substance layer to thickness of the second active substance layer is 6.5-23.0.

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：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：US20220102710A1

公开(公告)日：2022-03-31

申请号：US17547271

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun MA ,  Rui Shen ,  Libing He

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/04

Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. The negative electrode film of the secondary battery comprises a first negative electrode film and a second negative electrode film; the first negative electrode film is disposed on at least one surface of the negative electrode current collector and comprises a first negative electrode active material; and the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material, the first negative electrode active material comprises natural graphite and the first negative electrode active material satisfies: 0.60≤S1≤0.85; and the second negative electrode active material comprises artificial graphite. The secondary battery according to the present application has both better low-temperature rate performance and longer high-temperature cycle life while having a higher energy density.

公开(公告)号：US20210111399A1

公开(公告)日：2021-04-15

申请号：US17130787

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianjun MA ,  Libing HE

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/133

Abstract: This application provides a negative electrode plate, a secondary battery, a battery module, a battery pack, and an apparatus. The negative electrode plate includes a negative current collector and a plurality of active substance layers formed on the negative current collector, where the plurality of active substance layers include at least a first active substance layer and a second active substance layer; the first active substance layer includes a first negative active substance, and the second active substance layer includes a second negative active substance; a ratio of thickness of the negative active substance of the first active substance layer to average particle size of the first negative active substance is 2.0 to 4.0; and a ratio of thickness of the second active substance layer to average particle size of the second negative active substance is 2.2 to 5.0.