Featuring detailed case studies and industrial applications, this book is aimed at researchers and industry professionals who want a handy book encompassing the various aspects of battery management systems (BMS). The reader will first be introduced to the core and basic concepts of BMS. Next, performance testing and battery modeling will be explained to help readers understand Lithium ion batteries. Then basic functions and topologies of BMS will be described, with the aim of guiding readers to design simple BMS themselves. In addition, some advanced functions of BMS will be discussed, drawing from the research achievements of the authors, who have significant experience in cross-industry research. Case studies will be analyzed to demonstrate the numerous applications of BMS.