The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2019
Filed:
Jun. 08, 2017
Jiangsu Huadong Institute of Li-ion Battery Co., Ltd., Suzhou, Jiangsu, CN;
Tsinghua University, Beijing, CN;
Yong Yang, Suzhou, CN;
Hong-Sheng Zhang, Suzhou, CN;
Xiang-Ming He, Beijing, CN;
Jian-Jun Li, Beijing, CN;
Li Wang, Beijing, CN;
Guo-Hua Li, Suzhou, CN;
Tuan-Wei Li, Suzhou, CN;
Shu-Hui Wang, Suzhou, CN;
JIANGSU HUADONG INSTITUTE OF LI-ION BATTERY CO., LTD, Suzhou, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
Abstract
A method for screening a lithium ion battery is provided. A number of lithium ion batteries are galvanostatically discharged a to an inflection point voltage at an inflection point of a discharge curve at a first constant current I. The number of lithium ion batteries are rested for a first rest time Tto raise an open circuit voltage of the number of lithium ion batteries to U. Uis greater than the inflection point voltage. The number of lithium ion batteries are galvanostatically discharged to the inflection point voltage at a second constant current I, in which I<<I. The number of lithium ion batteries are rested for a second rest time Tand the batteries are screened based on a self-discharge of the number of lithium ion batteries.