Faculty Publications
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Item Novel Power Converters for Reconfiguration and Voltage Balancing of Dual Battery Pack Based EV(Institute of Electrical and Electronics Engineers Inc., 2022) Kumar, V.; Prabhakaran, P.; Raj, N.Battery Electric Vehicles predominantly come with a single battery pack. Reliability and limited driving range are the main obstacles to EV market growth. To overcome these, dual battery pack-based EVs are seen as a promising alternative for the future. This paper presents two novel power converters suitable for dual battery pack-based Electric Vehicles. The proposed converters can configure and connect two battery packs in series or parallel or operate with a single battery pack. The output terminals of the proposed converters can be connected directly to the charger terminal during charging or to the motor drive inverter during traction. When the EV is neither in charging mode nor in traction mode, and if there is a voltage imbalance between the two battery packs, proposed converters can transfer power from the battery pack with a higher terminal voltage to the other one. The converters' transfer function is derived using state-space averaging and small-signal modeling to design the converter's controller in the voltage balancing mode. The controller is designed using the K-factor approach. Detailed MATLAB simulations and hardware experiments are presented to validate the efficacy of proposed converters in different operating modes. © 2022 IEEE.Item Novel Reconfigurable Power Converters Facilitating Dual Battery Integration in Electric Vehicles(Institute of Electrical and Electronics Engineers Inc., 2025) Kumar, V.; Prabhakaran, P.; Raj, N.Battery-operated Electric Vehicles (EVs) are experiencing a significant surge in demand in today's market. The primary obstacles to the growth of the EV industry include concerns about range anxiety and reliability. To address these challenges, Dual battery-based solutions are emerging as a recent trend in the EV, specifically the two-wheeler segment. This paper introduces two novel reconfigurable power converters that enable dual battery integration. The converters can connect the dual batteries in series or in parallel or allow using a single battery during traction or charging. The output terminals of the converters can be directly connected to the charger or traction inverter. To connect dual batteries in parallel with minimum circulating currents, the terminal potentials must be nearly equal. The proposed converters include a voltage balancing feature to ensure this balance. To demonstrate dual battery charging, the proposed converter is integrated into a non-isolated inverter charger system (ICS). Transfer functions for the system with the proposed converter have been derived using state space averaging and small signal modeling, and the necessary controllers have been designed using the K-factor approach. Comprehensive MATLAB simulations and hardware experiments are presented to validate the effectiveness of the proposed power converters. © 1972-2012 IEEE.