Design of a Power Supply Architecture Suitable for a 200 V Analog Front-End in Automotive Battery Management Systems

As the trend towards higher voltage battery packs in electric vehicles and energy storage systems continues to grow, the need for efficient and simplified power conversion solutions becomes increasingly critical. This thesis presents the development of a high-voltage buck converter designed to step down a maximum 180 V input to approximately 8 V, specifically tailored for use in the front-end circuitry of a Battery Management System (BMS). The primary objective of this work is to create a simple converter architecture that avoids the complexity and cost associated with multi-stage designs while maintaining reasonable efficiency. By focusing on a single-stage buck converter design, this thesis addresses the challenge of high-voltage conversion with an emphasis on simplicity and practical implementation. The converter's performance is evaluated in terms of efficiency, thermal behavior, and stability under varying load conditions. The results demonstrate that a single-stage buck converter can effectively handle high-voltage inputs while maintaining reasonable efficiency, proving to be a viable solution for reducing the number of required BMS units.