This book presents the select proceedings of International Conference on Hybrid and Electric Automotive Technologies 2021 (HEAT 2021). It cover recent innovations in electric and hybrid-electric vehicles and autonomous vehicles. Various topics covered in this volume are batteries, battery cooling methodologies, use of nano-coolants, electrified powertrain systems and components, hybridisation infrastructure, energy storage, and many other topics of importance to the industry. The book will be useful for researchers and professionals working in the  areas of automobile and vehicle engineering.