Open AccessSinusoidal charging of Li‐ion battery based on frequency detection algorithm by pole placement control method
Author(s) -
Vazini Hossein,
Asadi Mehdi,
Karimadini Mohammad,
Hajisadeghian Hossein
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5626
Subject(s) - ripple , control theory (sociology) , battery (electricity) , controller (irrigation) , matlab , battery pack , integrator , state of charge , computer science , voltage , engineering , electrical engineering , control (management) , power (physics) , physics , agronomy , quantum mechanics , artificial intelligence , biology , operating system
This study presents a control system to track the sinusoidal ripple current (SRC) of lithium (Li)‐ion batteries. In this method, a combination of a DC and a sinusoidal ripple current is injected to the battery. By choosing the appropriate frequency, the minimum AC impedance of the battery is obtained. This study, the impact of temperature has been considered as a protection criterion in the proposed charge algorithm, also a state‐space model of the charger system has been developed, and finally a pole placement controller has been proposed to control charging current. To evaluate the design, a laboratory setup has been implemented to obtain experimental results from a 1 kW Li‐ion battery pack. Also, simulations have been carried out by Simulink/MATLAB. The proposed pole placement control method for tracking of SRC and the optimal frequency detection algorithm have been designed and tested on a practical 10 Ah Li iron phosphate battery pack in different charge modes. In addition, results of the conventional proportional–integrator (PI) controller have been compared with the proposed controller. Both simulation and experimental results show the effectiveness of the proposed algorithm and control system to track SRC reference current in all frequencies.