Performance Evaluation of KY Converter for Battery Management Systems in Electric Vehicles

Abstract

The performance and reliability of electric vehicles (EVs) heavily depend on the efficiency of their Battery Management Systems (BMS), where DC-DC converters play a vital role in ensuring regulated power flow between the battery pack and the load. Among various converter topologies, the KY converter emerges as a promising solution due to its unique capability of delivering non-pulsating output current, high efficiency, and low output voltage ripple. This paper presents a comprehensive performance analysis of the KY converter compared to conventional buck, boost, and buck-boost topologies under different EV operating scenarios. Through simulation and hardware-level validation, the KY converter demonstrates superior transient response, thermal stability, and reduced electromagnetic interference (EMI), making it highly suitable for integration in EV BMS. Additionally, its simple control architecture enables easier implementation while maintaining consistent performance under varying load and input conditions. The findings indicate that the KY converter is a highly effective and reliable power management component for modern electric vehicle systems.