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1.发明授权公开(公告)号：US12046753B2
公开(公告)日：2024-07-23
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 , H01M4/02 , H01M4/04 , H01M10/0525
CPC classification number: H01M4/583 , H01M4/0435 , H01M10/0525 , H01M2004/021 , H01M2004/027 , H01M2220/20
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.
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2.发明授权公开(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
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.
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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
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.
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公开(公告)号：US20230303396A1
公开(公告)日：2023-09-28
申请号：US18314832
申请日：2023-05-10
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Lianchuan Li , Yuanyuan Li , Libing He , Rui Shen
IPC: C01B32/205 , H01M10/0525
CPC classification number: C01B32/205 , H01M10/0525 , C01P2006/11 , C01P2004/61 , C01P2006/40
Abstract: An artificial graphite and a preparation method thereof, a secondary battery containing the artificial graphite, and an electric apparatus are provided. The artificial graphite includes secondary particles and satisfies A≥0.5, where A is a ratio of a powder compacted density of the artificial graphite at 2 t pressure to a particle size by volume Dv1 of the artificial graphite. The secondary battery provided in this application can have low cyclic volume swelling while maintaining high energy density.
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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.
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Patent Agency Ranking
公开(公告)号：US10700344B2
公开(公告)日：2020-06-30
申请号：US16199246
申请日：2018-11-26
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Meng Kang , Tianquan Peng , Yuliang Shen , Jiazheng Wang , Libing He
IPC: H01M4/133 , H01M4/583 , H01M10/0525 , H01M10/48 , H01M4/02
Abstract: The disclosure relates to a negative electrode plate and a secondary battery comprising the same. Specifically, the present disclosure provides a negative electrode plate comprising a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises a graphite material, and the negative electrode layer fulfills the condition: 0.45≤7.8/D50+1.9*D50/(VOI)2≤3.1, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; VOI represents the OI value of the negative electrode layer. The negative electrode plate can allow that a secondary battery containing the same has the combination of high energy density, fast charge, and long cycle life.
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公开(公告)号：US20190097271A1
公开(公告)日：2019-03-28
申请号：US16199240
申请日：2018-11-26
Applicant: Contemporary Amperex Technology CO., Limited
Inventor： Jiazheng WANG , Meng Kang , Tianquan Peng , Yuliang Shen , Libing He
IPC: H01M10/0583 , H01M10/04 , H01M4/04 , H01M4/66
Abstract: The disclosure relates to a negative electrode plate and a secondary battery comprising the same. Specifically, the disclosure provides a negative electrode plate comprising a negative electrode current collector and a negative electrode layer coated on at least one surface of the negative electrode current collector, the negative electrode layer comprising a negative electrode active material, wherein the negative electrode active material comprises graphite, and the negative electrode layer meets: 4×L×VOI−¼×Dn10≤25, wherein L represents the thickness of single-side negative electrode layer on the negative electrode current collector in millimeter; Dn10 represents the particle diameter corresponding to 10% of the number distribution of particles of the negative electrode active material in micrometer; VOI represents the orientation index of the negative electrode layer. The negative electrode plate can allow that a secondary battery containing the same has the combination of high energy density, fast charge, and long cycle life.
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8.发明公开公开(公告)号：US20240313202A1
公开(公告)日：2024-09-19
申请号：US18669551
申请日：2024-05-21
Applicant: Contemporary Amperex Technology Co,. Limited
Inventor： Jiazheng WANG , Meng Kang , Xiaobin Dong , Yuliang Shen , Libing He
IPC: H01M4/36 , H01M4/02 , H01M4/133 , H01M4/1393 , H01M4/587
CPC classification number: H01M4/366 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M2004/021 , H01M2004/027 , H01M2220/20
Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the same. In particular, the secondary battery comprises a negative electrode plate, and the negative electrode plate comprises a negative current collector and a negative electrode film, wherein the negative electrode film 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 current collector and comprises a first negative electrode active material; the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material, and the second negative electrode active material comprises secondary particles, a number percentage of which is greater than or equal to 20%, wherein the first negative electrode active material comprises natural graphite and the second negative electrode active material comprises artificial graphite.
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9.发明授权公开(公告)号：US12027695B2
公开(公告)日：2024-07-02
申请号：US17566713
申请日：2021-12-31
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Jiazheng Wang , Meng Kang , Xiaobin Dong , Yuliang Shen , Libing He
IPC: H01M4/36 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M4/02
CPC classification number: H01M4/366 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M2004/021 , H01M2004/027 , H01M2220/20
Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery. In particular, the secondary battery comprises a negative electrode plate, and the negative electrode plate comprises a negative current collector and a negative electrode film, wherein the negative electrode film 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 current collector and comprises a first negative electrode active material, the first negative electrode active material comprises graphite; the second negative electrode film is disposed on the first negative electrode film and comprises a second negative electrode active material, the second negative electrode active material comprises artificial graphite, and the second negative electrode active material comprises secondary particles, the number percentage of which is greater than or equal to 20%.
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公开(公告)号：US11901557B2
公开(公告)日：2024-02-13
申请号：US17547277
申请日：2021-12-10
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Meng Kang , Xiaobin Dong , Jiazheng Wang , Libing He
CPC classification number: H01M4/587 , H01M4/0404 , H01M4/133 , H01M4/366 , H01M4/505 , H01M4/525 , H01M2004/021 , H01M2004/027 , H01M2004/028 , H01M2220/20
Abstract: The present application discloses a negative electrode active material and a method for preparing the same, a secondary battery, and an apparatus including the secondary battery. The negative electrode active material includes a core and a coating layer covering the surface of the core, the core includes artificial graphite, the coating layer includes amorphous carbon, and the particle size uniformity of the negative electrode active material is from 0.25 to 0.45.
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