Open AccessFast screening of capacity and internal resistance for cascade utilization of the retired power lithium-ion batteries
Author(s) -
Wei Wei Liu,
Honglei Li,
Yelin Deng,
Fan Yang,
Cong Liu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1678/1/012067
Subject(s) - internal resistance , battery (electricity) , battery capacity , residual , lithium (medication) , lithium ion battery , cascade , power (physics) , automotive engineering , sensitivity (control systems) , electrical engineering , computer science , reliability engineering , engineering , electronic engineering , medicine , chemical engineering , algorithm , physics , quantum mechanics , endocrinology
The residual capacity and internal resistance of lithium-ion batteries are important indicators for evaluating the retired batteries, and they are also prerequisites for the cascade utilization of retired batteries. Screening of capacity and internal resistance of retired batteries was studied in this paper. In terms of battery residual capacity, the battery charging system is used to obtain the battery charging curves from which IC characteristics are extracted and screened. The relationship between the IC characteristics and the battery capacity is obtained using a neural network algorithm to achieve capacity estimation. In terms of internal resistance, the charge and discharge strategies of batteries connected in series was first studied, and then a screening method for battery internal resistance was designed based on such charge and discharge strategies. The overall results of this paper provided the basis for the selection of retired power batteries.