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：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：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.

公开(公告)号：US11469409B2

公开(公告)日：2022-10-11

申请号：US17232142

申请日：2021-04-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiazheng Wang ,  Yuliang Shen ,  Meng Kang ,  Libing He ,  Baojian Zhu ,  Lei Chen

IPC: H01M4/13 ,  H01M4/48 ,  H01M4/58 ,  H01M10/05 ,  H01M4/485 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention provides a negative electrode plate and a battery. The negative electrode plate comprises a negative current collector and a negative film that is provided on at least one surface of the negative current collector and comprises a negative active material. The negative film meets the follow relations: 6.0≤PD×Dv50≤32.0 and 0.2≤PD/Dn10≤12.0. The negative electrode plate of the present invention has excellent dynamic performance, and the battery of the present invention has both excellent dynamic performance and long cycle life.