Study and Implementation of Constant Current-Constant Voltage(CC-CV) Charger for Lithium-Ion(Li-Ion) Battery Using Machine Learning(ML)

Battery charging techniques plays a vital role in electric mobility applications as an energy storage system. Lithium-ion batteries have become indispensable in portable devices, electric vehicles and solar powered devices. In order to maximize the potential of these rechargeable batteries, this paper focuses on the basics to advanced study of Lithium-ion battery charging techniques. The necessary safety aspects and implementation of the charging methodologies are also discussed. The Constant Current (CC) scheme charges with a low, constant current to obtain full charge only at the end. Constant Voltage (CV) scheme has to maintain a constant voltage in order to charge the batteries and prolong its life. Hence the objective of this work is to integrate both CC and CV charging circuit for a lithium-ion battery. To prolong battery lifespan and improve the safety aspects, step by step study of combined CC-CV charging circuit is presented. Initially, the CC method is utilized to charge the battery until it reaches the specified State of Charge (SoC). This effectively eliminates overcurrent situation. Next, the CV method is involved to charge the remaining battery capacity, guaranteeing an efficiency of nearly 90%. Further, the focus on implementing machine learning algorithms to charging circuits are also discussed.