Method for screening lithium ion battery
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 I1. The number of lithium ion batteries are rested for a first rest time T1 to raise an open circuit voltage of the number of lithium ion batteries to U1. U1 is 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 I2, in which I2<<I1. The number of lithium ion batteries are rested for a second rest time T2 and the batteries are screened based on a self-discharge of the number of lithium ion batteries.
JIANGSU HUADONG INSTITUTE OF LI-ION BATTERY CO., LTD TSINGHUA UNIVERSITY
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inventional inventional additional inventional inventional inventional inventional
Yong Shu-Hui Li Jian-Jun Tuan-Wei Xiang-Ming Hong-Sheng Guo-Hua
Yang Wang Wang Li Li He Zhang Li