Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Tianquan Peng

Libing He

Meng Kang

Yuliang Shen

Jiazheng Wang

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&#x2264;P&#xd7;1.1/G+2/V&#x2264;1.3, P represents a porosity of the negative film, G represents a graphitization degree of the negative active material, Vrepresents 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.

Negative electrode plate and battery

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 positive electrode plate comprises a positive current collector and a positive film, the positive film is provided on at least one surface of the positive current collector and comprises a positive active material, 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 average particle diameter of the positive active material represented by D50 and a thickness of the negative film represented by Hsatisfy a relationship: 6&#x2264;0.06H&#xd7;(4&#x2212;1/D50)&#x2264;31. The battery of the present disclosure has the characteristics of excellent dynamics performance and long cycle life at the same time.

Secondary battery

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 Vand a pressing density of the negative film represented by PD satisfy a relationship: 0.7&#x2264;(80/V+43/PD)&#xd7;PD/V&#x2264;21.5, where a unit of the pressing density of the negative film represented by PD is g/cm. 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.

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&#x2264;7.8/D50+1.9*D50/(V)&#x2264;2.0, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; Vrepresents the OI value of the negative electrode layer. The secondary battery has the combination of high energy density, fast charge, and long cycle life.

Negative electrode plate and secondary battery comprising the same

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&#x2264;G&#xd7;3.5+2.8/CB&#x2264;6.2 and 1.23&#x2264;0.55/V+CB&#xd7;1.2&#x2264;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.

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&#x2264;7.8/D50+1.9*D50/(V)&#x2264;3.1, wherein D50 represents a volume distribution average particle diameter of particles of the negative electrode active material in micron; Vrepresents 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.

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&#xd7;L&#xd7;V&#x2212;&#xbc;&#xd7;Dn10&#x2264;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; Vrepresents 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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Ningde, China

Tianquan Peng