Faculty Publications
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Publications by NITK Faculty
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Item Design and analysis of dual output flyback converter for standalone PV/battery system(International Journal of Renewable Energy Research, 2017) Sabhahit, N.S.; Gaonkar, D.N.; Naik, A.In this paper, the cost comparison is carried out among flyback, forward and full bridge converters based upon the number of circuit components. The performance assessment in terms of efficiency of the PV array with MPPT controller using flyback and forward converter is detailed. The design and control of Photovoltaic/battery system using a flyback converter for stand-alone applications is presented. A flyback converter is used to get DC output along with an AC output for high frequency applications without employing an inverter. The PV/battery system uses photovoltaic array as the main source of power and a battery as the storage device. The energy input of the PV system is effectively utilized by adopting an MPPT technique and the storage battery is controlled to balance the load requirements using a bi-directional dc-dc converter. This system ensures that the load demand is satisfied under varying solar irradiance conditions and a constant voltage is maintained for different load conditions. The modelling and control strategy of the implemented system is realized in MATLAB/Simulink environment.Item Optimising cement-based electrolytes: Ionic strength analysis and electrical performance in cement-based battery applications(Taylor and Francis Ltd., 2025) Sundaramoorthi, A.; Thangaraju, P.A fully developed and commercialised cement-based battery system has the potential to revolutionise building technology. This paper evaluates the performance of cement-based batteries and explores the effect of adding Supplementary Cementitious Materials (SCMs) like fly ash, silica fume and blast slag, and ion-conductive particles, with copper and aluminium as electrode combinations. Cement-based matrix as the electrolyte of the developed battery system, is characterised for its ionic strength and is correlated to the electrical performance of the system. The solid phase of the different electrolyte mixes is also characterised using FE-SEM and XRD. Electrical performance parameters like open circuit voltage, discharge performance under constant current rate, and capacity measurements of devised battery systems are reported in this paper. The combination of cement with silica fume at 5%, along with epsomite (SF5) resulted in a 250% (approx.) higher discharge life and capacity in comparison to the control system (CM45). The ionic strength of the pore solution also showed a strong positive correlation (R2 = 0.92) with the discharge life across all mixes, highlighting its critical role in the battery system’s performance. The SF5 mix also showed sufficient mechanical stability with a compressive strength of 19.3 and 29.4 MPa at 7-d and 28-day, respectively. © 2025 Informa UK Limited, trading as Taylor & Francis Group.Item Single-port and multi-port self-reconfigurable battery topologies for dynamic cell balancing(Elsevier Ltd, 2025) Y.k, B.; V.p, A.; U, V.; G.k, P.Conventional batteries in electric vehicles (EVs) typically have fixed series-parallel configurations and experience issues such as over-charging/over-discharging and under capacity utilization due to cell imbalance. To address this, a novel single-port self-reconfigurable battery topology is proposed in this paper to balance the cells while maintaining stable terminal voltage. The switching circuit of the topology is designed to have high degree of reconfigurability with minimum number of switches. A supercapacitor is incorporated in the switching circuit to assist the battery during reconfiguration, which also enhances the dynamic performance of the battery. Further, the EV motor-drive and auxiliary loads operate at different nominal voltages; which are typically supplied through power electronic converters. To eliminate the need for power electronic DC-DC converters, a multi-port self-reconfigurable battery topology with stable port voltages is proposed, capable of providing different port voltages. The proposed topologies are verified by developing a single-port battery with a nominal voltage of 52 V and a three-port battery with nominal port voltages of 52 V, 24 V and 12 V using MATLAB/Simulink. The simulation results demonstrate the effectiveness of the proposed topologies in addressing cell imbalance issues, ensuring maximum capacity utilization and stable port voltages. © 2025 Elsevier LtdItem Supercapacitor Assisted Self-Reconfigurable Battery System for Enhanced Cell Balancing and Voltage Stability(John Wiley and Sons Inc, 2025) Bharath, Y.K.; Anandu, V.P.; Vinatha Urundady, U.Conventional battery systems with fixed configurations often suffer from cell imbalance arising from variations in cell voltages and capacity mismatches. These imbalances lead to overcharging, over-discharging, and under-utilization of individual cells, ultimately accelerating battery capacity degradation. To overcome these challenges, this article presents a self-reconfigurable battery system that dynamically balances cell voltages while maintaining a stable terminal voltage. The proposed system features a highly reconfigurable switching circuit designed with a minimal number of switches, ensuring optimal cost, space, and weight. A supercapacitor is integrated into the system to ensure voltage stability during reconfiguration events and enhance the overall dynamic response of the system. The effectiveness of the proposed approach is validated through the development of a 24 V self-reconfigurable battery prototype. Experimental results demonstrate the system's capability to mitigate cell imbalance, completely utilize the available battery capacity, and maintain voltage stability. © 2025 John Wiley & Sons Ltd.