An Equivalent Circuit Model With Variable Effective Capacity for \hbox Batteries

A new approach to equivalent circuit models for LiFePO 4 batteries is presented in this paper. The proposed battery model is a semi-physical nonlinear dynamic model with variable effective capacity. Fuzzy logic has been used to capture the nonlinear behavior of the battery in combination with contin...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2014-10, Vol.63 (8), p.3592-3599
Main Authors: Blanco, Cecilio, Sanchez, Luciano, Gonzalez, Manuela, Anton, Juan C., Garcia, Victor, Viera, Juan C.
Format: Article
Language:English
Subjects:
Analogies
Batteries
Battery charge measurement
Charging
Differential equations
Discharges (electric)
Electronic countermeasures
Equivalent circuits
Fuzzy logic
Integrated circuit modeling
Mathematical model
Mathematical models
Nonlinearity
Tanks
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Summary:A new approach to equivalent circuit models for LiFePO 4 batteries is presented in this paper. The proposed battery model is a semi-physical nonlinear dynamic model with variable effective capacity. Fuzzy logic has been used to capture the nonlinear behavior of the battery in combination with continuous-time differential equations. Fuzzy logic blocks are embedded in a state-space dynamic model as nonlinear constructive blocks. The proposed model has been validated for three different LiFePO 4 batteries. The model provides an intuitive physical analogy between charging LiFePO 4 batteries and filling a semi-rigid tank, which is useful for explanatory purposes.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2014.2309394