Evaluating the Effects of Constant Current C Rates on Li-Ion Battery State of Health and Charging Efficiency

This study uses the constant current (CC) - constant voltage (CV) phases to show how Li-Ion batteries are charged. At the CC stage, the C rate capacities are 0.5C, 0.8C, 1C, and 1.4C. Increasing the C rate when charging does not guarantee that the battery’s State of Health (SOH) is maintained. In addition, battery charging time is not necessarily faster. The demonstration in this paper is used to find out what the appropriate C rate capacity is so that SOH and charging time can be optimized. The results of the simulation show that when charging the battery with a C rate of 1.4C, there is an increase in internal resistance of 10mΩ compared to when the C rate is 1C. This causes charging efficiency and SOH or battery performance to decrease. In addition, a C rate of 1.4C requires a CV stage charging time of 75 s longer than a C rate of 1C.