Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology Limited

Manfang Zhang

Fuping Luo

Shengwei Wang

Qiaoge Wang

Xinxin Du

Chuanmiao Yan

Yanyun Tan

The present disclosure provides a lithium-ion battery, the lithium-ion battery comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The positive active material comprises a material having a chemical formula of LiNiCoMO, the negative active material comprises a graphite-type carbon material, the lithium-ion battery satisfies a relationship 58%&#x2264;KY/(KY+KY)&#xd7;100%&#x2264;72%. In the present disclosure, by reasonably matching the relationship between the anti-compression capability of the positive active material and the anti-compression capability of the negative active material, it can make the positive electrode plate and the negative electrode plate both have good surface integrity, and in turn make the lithium-ion battery have excellent dynamics performance and excellent cycle performance at the same time.

Lithium-ion battery

The present disclosure provides a lithium-ion secondary battery, which comprises a positive electrode plate, a negative electrode plate, a separator and an electrolyte. The lithium-ion secondary battery satisfies a relationship: 1.5&#x2264;(m&#xd7;C)/(&#x3c1;&#xd7;Cap)&#x2264;6.5. In the present disclosure, by comprehensively considering the rated capacity of the battery, the mass of the electrolyte and the intrinsic parameters of the electrolyte and reasonably quantifying the relationship thereof, the lithium-ion secondary battery can have good dynamics performance and longer cycle life at the same time.

Lithium-ion secondary battery

Growing community of inventors

Ningde, China

Manfang Zhang