公开(公告)号：US20190267609A1

公开(公告)日：2019-08-29

申请号：US16282281

申请日：2019-02-21

Applicant: Ningde Amperex Technology Limited

Inventor： Yajie Li ,  Changchuan Shi ,  Xinghua Tao ,  Zhanzhao Fang ,  Chao Gao

IPC: H01M4/13 ,  H01M10/0525

Abstract: An embodiment of the present application provides a negative electrode and a lithium ion battery including the negative electrode, the negative electrode includes a negative electrode current collector, and a negative electrode active material layer arranged on the negative electrode current collector, wherein the negative electrode active material layer includes a negative electrode active material and a dispersant, and the dispersant includes lithium carboxymethylcellulose, wherein the mass ratio of the negative electrode active material to the dispersant being ≥18.74. The present application greatly reduces the DC resistance of the lithium ion battery and the charge transfer resistance at the interface without losing the energy density of the lithium ion battery, without affecting the cycle life of the lithium ion battery or causing cyclic expansion, which avoids the lithium precipitation phenomenon of the lithium ion battery during the cycle of charge and discharge.

公开(公告)号：US10135279B2

公开(公告)日：2018-11-20

申请号：US15626951

申请日：2017-06-19

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Fuping Luo ,  Yu Luo ,  Shengwei Wang ,  Zhanzhao Fang ,  Chao Gao ,  Qiang Zheng

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44

Abstract: Embodiments of the present application provide a method of battery charging, which relates to the field of battery charging and is capable of effectively improving safety performance of the battery. The method includes: obtaining an anode open circuit voltage curve, an anode impedance curve, a lithium deposition potential threshold and a state of charge, corresponding to a battery; determining a current anode open circuit voltage according to the anode open circuit voltage curve and the state of charge; determining a current anode impedance according to the anode impedance curve and the state of charge; determining a current charging current according to the current anode open circuit voltage, the current anode impedance and the lithium deposition potential threshold; and charging the battery according to the current charging current. Embodiments of the present application are applicable to a rapid battery charging process.