Design and estimation of state-charging applied for lithium-ion battery based on Matlab-Simulink

For green technology applications, the lithium-ion battery is widely adopted as energy storage system due to high power and high energy density. However, there is a drawback on the storage system on charging interval time, particularly on electric vehicle applications. To accelerate, the multi-state current technique becomes a solution. In this paper, the state-charging of the lithium ion battery modeled by Matlab/Simulink is discussed. The state-of-charge (SOC) is measured and applied to evaluate the battery's charge/discharge characteristic. The multiple charging states applied for filling the battery capacity are evaluated in order to achieve high efficiency. In addition, the configurable three-state current design manipulated by a 8-bit microcontroller is introduced with a constant voltage at 20V and variable current from 5A to 60A. The investigation results are illustrated that, operating on Lithium-ion Ferro battery 12V 30Ah, the interval time of fill-up is reduced approximately 30% with working temperature 35° C.