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

IPC: H01M4/583 ,  C01B32/20

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.

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.