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公开(公告)号：US20220059864A1
公开(公告)日：2022-02-24
申请号：US17519601
申请日：2021-11-05
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yuliang SHEN , Meng KANG , Jiazheng WANG , Libing HE
Abstract: The present application relates to a negative electrode plate and a secondary battery. Specifically, the present application provides a negative electrode plate comprising a negative electrode current collector and an negative electrode film coated on at least one surface of the negative electrode current collector and containing the negative active material, wherein the negative electrode plate satisfies 0.6≤0.7×P×(D90−D10)/D50+B/3≤8.0, wherein P refers to the porosity of the negative electrode film; B refers to the active specific surface area of the negative electrode film, and the unit thereof is m2/g; D10 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 10%, D90 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 90%, and D50 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 50%.
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公开(公告)号：US20210249650A1
公开(公告)日：2021-08-12
申请号：US16973903
申请日：2019-10-14
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Meng KANG , Yuliang SHEN , Jiazheng WANG , Libing HE
Abstract: The present application provides a negative electrode sheet and a secondary 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 comprising a negative active substance. The negative electrode sheet also satisfies: 0.3≤a×(1.1/b+0.02×c)≤6.0, where a represents the specific surface area of the negative electrode film, and the unit is m2/g; b represents the compaction density of the negative electrode film, and the unit is g/cm3; c represents the cohesive force between the negative electrode film and the negative current collector, and the unit is N/m. The present application can make the negative electrode sheet have excellent dynamics performance, and meanwhile ensure that the secondary battery has good dynamics performance and cycle performance without sacrificing energy density.
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Patent Agency Ranking
公开(公告)号：US20200067125A1
公开(公告)日：2020-02-27
申请号：US16282537
申请日：2019-02-22
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Yuliang SHEN , Meng KANG , Jiazheng WANG , Libing HE
Abstract: The present application relates to a negative electrode plate and a secondary battery. Specifically, the present application provides a negative electrode plate comprising a negative electrode current collector and an negative electrode film coated on at least one surface of the negative electrode current collector and containing the negative active material, wherein the negative electrode plate satisfies 0.60.7×P×(D90-D10)/D5O+B/38.0 wherein P refers to the porosity of the negative electrode film; B refers to the active specific surface area of the negative electrode film, and the unit thereof is m2/g; D10 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 10%, D90 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 90%, and D50 refers to the particle size corresponding to the cumulative volume percentage of the negative active material reaching 50%.
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公开(公告)号：US20190334160A1
公开(公告)日：2019-10-31
申请号：US16389752
申请日：2019-04-19
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Meng KANG , Tianquan PENG , Yuliang SHEN , Jiazheng WANG , Libing HE
IPC: H01M4/133 , H01M10/058 , H01M10/0525
Abstract: 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：US20210249656A1
公开(公告)日：2021-08-12
申请号：US16973536
申请日：2019-10-15
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Jiazheng WANG , Meng KANG , Yuliang SHEN , Libing HE
Abstract: 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：US20210234148A1
公开(公告)日：2021-07-29
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 , H01M4/485 , H01M4/587 , H01M10/0525
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.
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公开(公告)号：US20190341612A1
公开(公告)日：2019-11-07
申请号：US16395707
申请日：2019-04-26
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Yuliang SHEN , Meng KANG , Tianquan PENG , Jiazheng WANG , Libing HE
Abstract: 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 the negative electrode plate satisfies a relationship: 0.27≤P×1.1/G+2/VOI≤1.3, P represents a porosity of the negative film, G represents a graphitization degree of the negative active material, VOI represents an OI value of the negative film. The battery of the present disclosure can have the characteristics of long cycle life, high energy density and excellent dynamics performance at the same time.
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