State of charge modeling of lithium-ion batteries using dual exponential functions
Journal
Journal of Power Sources
Journal Volume
315
Pages
331-338
Date Issued
2016
Author(s)
Kuo, T.-J.
Lee, K.-Y.
Huang, C.-K.
Chen, J.-H.
Chiu, W.-L.
Huang, C.-F.
Abstract
A mathematical model is developed by fitting the discharging curve of LiFePO4 batteries and used to investigate the relationship between the state of charge and the closed-circuit voltage. The proposed mathematical model consists of dual exponential terms and a constant term which can fit the characteristics of dual equivalent RC circuits closely, representing a LiFePO4 battery. One exponential term presents the stable discharging behavior and the other one presents the unstable discharging behavior and the constant term presents the cut-off voltage. © 2016 Elsevier B.V. All rights reserved.
Other Subjects
Charging (batteries); Curve fitting; Electric batteries; Equivalent circuits; Exponential functions; Lithium alloys; Lithium compounds; Lithium-ion batteries; Reconfigurable hardware; Cut-off voltages; Discharging behaviors; Equivalent RC circuit; Exponential models; LiFePO; Stable discharging; State of charge; State-of charge models; Secondary batteries
Type
journal article