The Impact of Battery Charging and Discharging Current Limits on EV Battery Degradation and Safety
Alex Masakure, Amandeep Gill, Manjeet Singh
Abstract
This research paper explores the influence of charging and discharging current limits on the degradation and safety of electric vehicle (EV) batteries. Focusing on lithium-ion batteries, commonly used in EVs, the study investigates the electrochemical processes, mechanical strains, and thermal effects that contribute to battery deterioration. It highlights the detrimental impact of high current densities on capacity fading, impedance rise, and thermal runaway. Trade-offs between system performance and battery safety are discussed, along with optimization methods based on battery chemistry, temperature, and state of charge. Recent advancements in battery management systems, including real-time current limit control and adaptive techniques, are examined as means to regulate current limits more precisely. The research emphasizes the importance of considering battery system design and operation in various applications. Although optimizing current limits can extend battery life and mitigate safety risks, further research is required to determine ideal values and their relationship with other system variables. This study contributes to the understanding of the impact of current limits on EV battery degradation and safety, supporting the development of more efficient and reliable battery systems for transportation and energy storage.