This article provides a comprehensive guide on how to design an effective BMS, covering key factors like topology selection, hardware components, software algorithms, testing and more. The first step in designing a BMS is deciding on the topology or architecture. The battery management system (BMS) monitors the battery and possible fault conditions, preventing the battery from situations in which it can degrade, fade in capacity, or even potentially harm the user or surrounding environment. It is also the responsibility of the BMS to provide an accurate. A battery management system (BMS) is an electronic system that monitors and manages the operational variables of rechargeable batteries. Nowadays, Li-ion batteries reign supreme, with energy densities up to 265 Wh/kg.