Izvorni znanstveni članak
Comparison of Conventional and Fuzzy Logic-based Charging Control Systems without and with State-of-Charge Estimator
Karlo Kvaternik
; AVL-AST d.o.o., Strojarska cesta 22, 10000 Zagreb, Croatia
Danijel Pavković
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
Josip Kasać
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
Mihael Cipek
; Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Ivana Lučića 5, 10000 Zagreb, Croatia
Sažetak
Lithium-titanate battery cells stand out among the various rechargeable lithium battery chemistries available today due to their exceptional thermal stability and operational safety, which make them suitable for highly demanding applications characterized by high charging/discharging rates and operating temperatures. This paper proposes a battery charging control system arranged in the so-called cascade control structure, wherein the battery voltage and stateof-charge control is performed by means of a fuzzy logic controller. An extended Kalman filter is used to provide the state-of-charge feedback utilizing the realistic nonlinear Thevenin model of the battery cell equivalent circuit. Simulations using a readily available lithium-titanate battery cell model demonstrate that fuzzy logic-based charging control reduces the time needed to recharge from deeply discharged state (from 20% state-of-charge initial value) by 17.7% compared to the conventional constant-current constant-voltage charging control strategy, with the average charging current used as the criterion for the comparison of these heterogenous control strategies.
Ključne riječi
Lithium-Titanate Battery Cell; Constant-Current/Constant Voltage Charging; State-of-Charge Estimation; Extended Kalman Filter.
Hrčak ID:
326797
URI
Datum izdavanja:
7.1.2025.
Posjeta: 596 *