Title :
Comparing open-circuit voltage hysteresis models for lithium-iron-phosphate batteries
Author :
Baronti, F. ; Femia, N. ; Saletti, R. ; Zamboni, W.
Author_Institution :
Dipt. di Ing. dell´Inf., Univ. di Pisa, Pisa, Italy
Abstract :
The hysteresis in the state-of-charge (SoC) vs. open-circuit voltage characteristic of a lithium-iron-phosphate (LiFePO4, LFP) battery is modelled with two approaches. The first one is based on a first-order charge relaxation equation, the second one is the Preisach model implemented with the Everett function. The advantages and drawbacks of the methods are discussed. Simulation results are compared for a 20 A h LFP cell, stimulated with various SoC evolutions, allowing us to draw minor loops in the SoC-OCV plane. The results are also compared to experimental data.
Keywords :
iron compounds; lithium compounds; phosphorus compounds; relaxation; secondary cells; Everett function; LiFePO4; Preisach model; SoC-OCV plane; first-order charge relaxation equation; open-circuit voltage characteristic; open-circuit voltage hysteresis models; state-of-charge; Batteries; Equations; Hysteresis; Integrated circuit modeling; Magnetic hysteresis; Mathematical model; System-on-chip;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7049363
