Fast Charging Behaviour of High-Power Li-Ion Cell at Different Temperatures and Effect on Capacity and Internal Resistance

Abstract

Lithium-Ion Batteries (LIBs), which have already proven to be a reliable power source in consumer electronics devices, are being considered a viable option for powering Electric Vehicles (EVs). Fast charging of EVs is one of the key challenges that is preventing a wide range of adoption of EVs. In this study, a lithium-ion cell with Lithium Titanium Oxide (LTO)-lithium Nickel Manganese Cobalt oxide (NMC) chemistry of 30 Ah has been used to study the fast charging capabilities at different temperatures and C-rates. Various parameters such as temperature rise, nominal and exponential capacity, and internal resistance have been studied for different C-rates (C/3, 1C, and 2C) and at different temperatures (25 °C, 40 °C, and -10 °C). The ΔV values along with the charge and discharge characteristics have been analyzed, and the experimental results are compared with the simulation results.