As electric vehicles (EVs) adoption continues to grow, the requirement for efficiency and choices for rapid charging becomes crucial. This paper attempts an in-depth look into rapid-charging systems for DC-based EVs. DC fast charging (DCFC), also known as Level 3 charging, provides much faster charging times than traditional AC charging techniques, allowing EVs to attain higher driving ranges while also minimizing charging time. This work provides an overview of the importance of EVs, fundamental principles of DCFC by covering the hardware components and charging protocols used. Various DC fast-charging protocols are studied, highlighting their specifications, compatibility, and market adoption. The work then analyzes the key technological advances in DCFC infrastructure, including charging power levels, charging station design, and grid integration. The articles cover topics, i.e., different converter topologies, bidirectional converters, energy storage integration, fast charging, efficiency improvement strategies, followed by system modeling and control.