公开(公告)号：US12034153B2

公开(公告)日：2024-07-09

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 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

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

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：US11784311B2

公开(公告)日：2023-10-10

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 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/485 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/583 ,  H01M4/131 ,  H01M4/133 ,  H01M4/364 ,  H01M4/366 ,  H01M4/485 ,  H01M10/052 ,  H01M2004/021

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：US11322739B2

公开(公告)日：2022-05-03

申请号：US17513937

申请日：2021-10-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun Ma ,  Rui Shen ,  Libing He

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

Abstract: 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：US11450842B2

公开(公告)日：2022-09-20

申请号：US17541297

申请日：2021-12-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun Ma ,  Rui Shen ,  Libing He

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

Abstract: 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

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Rui Shen ,  Jianjun Ma ,  Libing He

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

Abstract: 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

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun Ma ,  Rui Shen ,  Libing He

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

Abstract: 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

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuanyuan Li ,  Jianjun Ma ,  Rui Shen ,  Libing He

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

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%; 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

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianjun Ma ,  Libing He

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

CPC classification number: H01M4/366 ,  H01M4/133 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

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：US20190074539A1

公开(公告)日：2019-03-07

申请号：US15846869

申请日：2017-12-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Rui Shen ,  Jianjun Ma ,  Libing He

IPC: H01M10/0525 ,  H01M4/525 ,  H01M4/485 ,  H01M4/583

Abstract: 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：US12230800B2

公开(公告)日：2025-02-18

申请号：US17547280

申请日：2021-12-10

Applicant: Contemporary Amperex Technology Co., Limited

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

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

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 layered lithium transition metal oxides and modified compounds thereof, and a resistance R of the negative electrode plate satisfies: 6.0 mΩ≤R≤12.0 mΩ; or 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.