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公开(公告)号：US10700344B2
公开(公告)日：2020-06-30
申请号：US16199246
申请日：2018-11-26
发明人： Meng Kang , Tianquan Peng , Yuliang Shen , Jiazheng Wang , Libing He
IPC分类号： H01M4/133 , H01M4/583 , H01M10/0525 , H01M10/48 , H01M4/02
摘要： 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
发明人： Jiazheng WANG , Meng Kang , Tianquan Peng , Yuliang Shen , Libing He
IPC分类号： H01M10/0583 , H01M10/04 , H01M4/04 , H01M4/66
摘要： 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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3.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
发明人： Jiazheng WANG , Meng Kang , Xiaobin Dong , Yuliang Shen , Libing He
IPC分类号： H01M4/36 , H01M4/02 , H01M4/133 , H01M4/1393 , H01M4/587
CPC分类号： H01M4/366 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M2004/021 , H01M2004/027 , H01M2220/20
摘要： 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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4.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
发明人： Jiazheng Wang , Meng Kang , Xiaobin Dong , Yuliang Shen , Libing He
IPC分类号： H01M4/36 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M4/02
CPC分类号： H01M4/366 , H01M4/133 , H01M4/1393 , H01M4/587 , H01M2004/021 , H01M2004/027 , 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. 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：US20200280048A1
公开(公告)日：2020-09-03
申请号：US16875124
申请日：2020-05-15
发明人： Meng Kang , Tianquan Peng , Yuliang Shen , Jiazheng Wang , Libing He
IPC分类号： H01M4/133 , H01M4/583 , H01M10/0525
摘要： The disclosure relates to a secondary battery comprising a negative electrode plate the same. Specifically, the present disclosure provides secondary battery, comprising a negative electrode plate, the negative electrode plate comprises 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: 0.75≤7.8/D50+1.9*D50/(VOI)2≤2.0, 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 secondary battery has the combination of high energy density, fast charge, and long cycle life.
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公开(公告)号：US11469418B2
公开(公告)日：2022-10-11
申请号：US16973536
申请日：2019-10-15
发明人： Jiazheng Wang , Meng Kang , Yuliang Shen , Libing He
摘要： The present application provides a negative electrode sheet and a battery. The negative electrode sheet includes a negative current collector and a negative electrode film provided on at least one surface of the negative current collector and including a negative active material, and the negative electrode film satisfies: 4≤P×[(30−Dv50)/2+2×(10−M)]≤20. P represents a porosity of the negative electrode film; Dv50 represents a volume median particle diameter of the negative active material, and a unit is μm; M represents a capacity per unit area of a negative electrode film, and a unit is mAh/cm2. The negative electrode sheet of the present application has the characteristics of excellent dynamics performance, and the battery of the present application also has the characteristics of excellent dynamics performance, long cycle life and high energy density at the same time.
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公开(公告)号：US11177477B2
公开(公告)日：2021-11-16
申请号：US16389760
申请日：2019-04-19
发明人： Meng Kang , Tianquan Peng , Yuliang Shen , Libing He
IPC分类号： H01M4/587 , H01M4/133 , H01M10/0525 , H01M4/02
摘要： The present disclosure provides a negative electrode plate and a battery, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material. The negative active material comprises graphite, and an OI value of the negative film represented by VOI and a pressing density of the negative film represented by PD satisfy a relationship: 0.7≤(80/VOI+43/PD)×PD/VOI≤21.5, where a unit of the pressing density of the negative film represented by PD is g/cm3. The battery of the present disclosure can have the characteristics of fast charging speed, high energy density, good safety performance and long cycle life at the same time.
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公开(公告)号：US11133494B2
公开(公告)日：2021-09-28
申请号：US16875124
申请日：2020-05-15
发明人： Meng Kang , Tianquan Peng , Yuliang Shen , Jiazheng Wang , Libing He
IPC分类号： H01M4/133 , H01M4/583 , H01M10/0525 , H01M10/48 , H01M4/02
摘要： The disclosure relates to a secondary battery comprising a negative electrode plate the same. Specifically, the present disclosure provides secondary battery, comprising a negative electrode plate, the negative electrode plate comprises 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: 0.75≤7.8/D50+1.9*D50/(VOI)2≤2.0, 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 secondary battery has the combination of high energy density, fast charge, and long cycle life.
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公开(公告)号：US11088361B2
公开(公告)日：2021-08-10
申请号：US16389752
申请日：2019-04-19
发明人： Meng Kang , Tianquan Peng , Yuliang Shen , Jiazheng Wang , Libing He
IPC分类号： H01M4/133 , H01M4/587 , H01M10/0525 , H01M10/058 , H01M4/02
摘要： The present disclosure provides a secondary battery, the secondary battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte, the negative electrode plate comprises a negative current collector and a negative film, the negative film is provided on at least one surface of the negative current collector and comprises a negative active material. The secondary battery satisfies relationships 3.9≤G×3.5+2.8/CB≤6.2 and 1.23≤0.55/VOI+CB×1.2≤2.80 at the same time. The battery of the present disclosure has the characteristics of high energy density and excellent dynamics performance, and the battery of the present disclosure also has the characteristic of long cycle life while charged under a large rate and a fast speed.
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公开(公告)号：US10658703B2
公开(公告)日：2020-05-19
申请号：US16199240
申请日：2018-11-26
发明人： Jiazheng Wang , Meng Kang , Tianquan Peng , Yuliang Shen , Libing He
摘要： 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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