公开(公告)号：US20230042859A1

公开(公告)日：2023-02-09

申请号：US17957002

申请日：2022-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Jun He ,  Hui Cui ,  Qiang Zheng ,  Zhanzhao Fang

IPC: H01M10/44 ,  H01M10/42 ,  H01M50/491 ,  H02J7/00

Abstract: A method for enhancing battery cycle performance. The method is applied in a battery and includes: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage, and the second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an organic solvent. The organic solvent includes a chain carboxylate compound. A weight percent of the chain carboxylate compound in the organic solvent is 10% to 70%. This application further provides an electronic device. The method can enhance high-temperature cycle and storage performance of the battery.

公开(公告)号：US09761881B2

公开(公告)日：2017-09-12

申请号：US15092572

申请日：2016-04-06

Applicant: Ningde Amperex Technology Limited ,  Dongguan Amperex Technology Limited

Inventor： Hongguang Shen ,  Fuping Luo ,  Chao Gao ,  Qiang Zheng ,  Shengwei Wang

IPC: H01M10/05 ,  H01M4/62 ,  C08F2/26 ,  H01M10/0525 ,  C08F222/16

CPC classification number: H01M4/622 ,  C08F2/26 ,  C08F2222/165 ,  H01M10/0525 ,  H01M2220/20 ,  Y02E60/122 ,  C08F220/14 ,  C08F2220/1825 ,  C08F220/06 ,  C08F212/08

Abstract: The present application discloses a binder for a lithium ion battery, which comprises a polymer obtained through emulsion polymerization of a monomer in the presence of a reactive emulsifying agent. The binder is used in fabrication of a lithium ion electrode plate, whereby a thin film formed on the surface of an electrode membrane and fine channels formed in the electrode membrane with the use of a conventional emulsifying agent during the electrode membrane-forming process are eliminated, and the lithium ion conductivity of the electrode membrane is improved. Meanwhile, with the use of the reactive emulsifying agent, the bonding effect of the binder and the stability of the electrode membrane are improved, thereby greatly improving the charging rate and cycle life of the lithium ion battery.