Study of Charging Strategies of Lithium Batteries and their Effect on the Batteries Technologies

In this paper, three different technologies were used to measure lithium battery charging behaviors. Graupner ultra duo 60 plus charger, EVM BQ27546, and LTC4054 chargers were used to compare the functionality of Li-Ion, LiFePO4, and Li-Po batteries. Charging at different C-rates was analyzed. Logged data from the chargers give information about the batteries charging characteristics, e.g., voltage, current, capacity, internal resistance, and efficiencies. The results showed that Graupner and EVM chargers were following the CC-CV algorithm, while the manufacturer of the LTC4054 battery charger says that it is using the CC-CV method, but our results showed that the current starts decreasing from the very beginning until the battery is fully charged. From the data, it can be concluded that LiFePO4 is the best choice at recommended 1C-rate as the charging efficiency of the battery is 100% as compared to 96% and 90% for Li-Po and Li-Ion, respectively. From the research, it is considered that a charger is equally essential as they must be compatible depending upon the battery technology.