Electronic Vehicle Battery Problems: Pack, Management, and Solutions

This report provides a detailed examination of electronic vehicle (EV) battery problems, focusing on battery pack design, battery management systems (BMS), and factors impacting battery life. The report begins with an introduction to battery packs, discussing their components like contactors, pre-charge circuits, fuses, and manual service disconnects, and how these elements contribute to the overall safety and functionality of the high-voltage system. It explores the factors that affect battery pack life, such as overcharging at high temperatures and high voltage, and the impact of these factors on battery degradation. The report then delves into battery management systems, detailing their functions, current implementations, and the issues associated with them, including battery state evaluation, cell voltage measurement, battery states estimation, battery modeling, and cell balancing. Challenges with BMS and their corresponding solutions are also discussed. Furthermore, the report addresses battery pack management strategies and concludes with a life cycle assessment of battery packs in electric vehicles, providing a comprehensive overview of the key considerations for EV battery technology.