公开(公告)号：US12034153B2

公开(公告)日：2024-07-09

申请号：US17547271

申请日：2021-12-10

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Rui Shen ,  Libing He

IPC分类号： H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

CPC分类号： H01M4/366 ,  H01M4/0404 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2220/20

摘要： 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：US11784311B2

公开(公告)日：2023-10-10

申请号：US17544964

申请日：2021-12-08

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Rui Shen ,  Libing He ,  Lei Chen ,  Baojian Zhu

IPC分类号： H01M4/583 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/485 ,  H01M10/052 ,  H01M4/02

CPC分类号： H01M4/583 ,  H01M4/131 ,  H01M4/133 ,  H01M4/364 ,  H01M4/366 ,  H01M4/485 ,  H01M10/052 ,  H01M2004/021

摘要： 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：US11322739B2

公开(公告)日：2022-05-03

申请号：US17513937

申请日：2021-10-29

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Rui Shen ,  Libing He

IPC分类号： H01M4/133 ,  H01M4/36 ,  H01M4/1315 ,  H01M4/587 ,  H01M10/052 ,  H01M4/04 ,  H01M4/525 ,  H01M4/02

摘要： The present application relates to a secondary battery, a method for manufacturing the same and an apparatus containing the same. Specifically, in the secondary battery, the first negative electrode film comprises a first negative electrode active material, the second negative electrode film comprises a second negative electrode active material. The first negative electrode active material comprises natural graphite and satisfies: 12%≤A≤18%; the second negative electrode active material comprises artificial graphite and satisfies: 20%≤B≤30%; A is a resilience rate of the first negative electrode active material measured under an action force of 15,000 N, and B is a resilience rate of the second negative electrode active material measured under an action force of 15,000 N. The secondary battery of the present application can have better kinetic performance and better high-temperature storage performance while maintaining higher energy density.

公开(公告)号：US11437623B2

公开(公告)日：2022-09-06

申请号：US17542533

申请日：2021-12-06

申请人： Contemporary Amperex Technology Co., Limited

发明人： Rui Shen ,  Jianjun Ma ,  Libing He

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

摘要： 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：US11258060B2

公开(公告)日：2022-02-22

申请号：US17130787

申请日：2020-12-22

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Jianjun Ma ,  Libing He

IPC分类号： H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

摘要： 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.

公开(公告)号：US11450842B2

公开(公告)日：2022-09-20

申请号：US17541297

申请日：2021-12-03

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Rui Shen ,  Libing He

IPC分类号： H01M4/133 ,  H01M4/1393 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0585 ,  H01M4/02

摘要： The present application relates to a secondary battery, a method for manufacturing the same and an apparatus containing the same. Specifically, in the secondary battery the first negative electrode film comprises a first negative electrode active material, the second negative electrode film comprises a second negative electrode active material. The first negative electrode active material comprises natural graphite and satisfies: 6 mΩ·cm≤A≤12 mΩ·cm, the second negative electrode active material comprises artificial graphite and satisfies: 13 mΩ·cm≤B≤20 mΩ·cm, A is a powder resistivity of the first negative electrode active material tested at a pressure of 8 Mpa, and B is a powder resistivity of the second negative electrode active material tested at a pressure of 8 Mpa. The secondary battery of the present application can have better kinetic performance and longer cycle life while maintaining higher energy density.

公开(公告)号：US11417869B2

公开(公告)日：2022-08-16

申请号：US17013734

申请日：2020-09-07

申请人： Contemporary Amperex Technology Co., Limited

发明人： Rui Shen ,  Jianjun Ma ,  Libing He

IPC分类号： H01M4/133 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/583 ,  H01M4/485 ,  H01M4/62 ,  H01M4/505 ,  H01M4/587 ,  H01M4/02 ,  H01M4/131

摘要： The present application relates to a lithium ion secondary battery comprising a cathode, an anode, a separator and an electrolyte; wherein the cathode comprises a positive current collector and a positive material layer, wherein the positive material layer comprises a positive active material with a formula LixNiaCobMcO2, M is at least one selected from Mn and Al, 0.95x1.2, 0

公开(公告)号：US20220093906A1

公开(公告)日：2022-03-24

申请号：US17541297

申请日：2021-12-03

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Rui Shen ,  Libing He

IPC分类号： H01M4/133 ,  H01M4/1393 ,  H01M10/0585 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

摘要： The present application relates to a secondary battery, a method for manufacturing the same and an apparatus containing the same. Specifically, in the secondary battery the first negative electrode film comprises a first negative electrode active material, the second negative electrode film comprises a second negative electrode active material. The first negative electrode active material comprises natural graphite and satisfies: 6 mΩ.cm≤A≤12 mΩ.cm, the second negative electrode active material comprises artificial graphite and satisfies: 13 mΩ.cm≤B≤20 mΩ.cm, A is a powder resistivity of the first negative electrode active material tested at a pressure of 8 Mpa, and B is a powder resistivity of the second negative electrode active material tested at a pressure of 8 Mpa. The secondary battery of the present application can have better kinetic performance and longer cycle life while maintaining higher energy density.

公开(公告)号：US20220123307A1

公开(公告)日：2022-04-21

申请号：US17402668

申请日：2021-08-16

申请人： Contemporary Amperex Technology Co., Limited

发明人： Yuanyuan Li ,  Jianjun Ma ,  Rui Shen ,  Libing He

IPC分类号： H01M4/587 ,  H01M10/0525 ,  C01B32/205

摘要： 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%; the negative electrode plate has a compaction density of 1.55 g/cm3 to 1.75 g/cm3, 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：US11664495B2

公开(公告)日：2023-05-30

申请号：US17051187

申请日：2019-10-14

申请人： Contemporary Amperex Technology Co., Limited

发明人： Jianjun Ma ,  Libing He

IPC分类号： H01M4/36 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

CPC分类号： H01M4/366 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

摘要： 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.