Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item A Modularized Two-Stage Active Cell Balancing Circuit for Series Connected Li-Ion Battery Packs(Institute of Electrical and Electronics Engineers Inc., 2022) Manjunath, K.; Kalpana, R.This paper addresses a modularized two-stage active cell balancing topology based on an improved buck-boost converter for a series connected Lithium-ion battery string. The proposed topology has a modular structure, each module consisting of three cells, two inductors, and four MOSFET switches. This technique provides module-to-module balancing in the first stage. Moreover, it can simultaneously target and balance two cells in a module in the second stage. Thus, significantly reduces the cell balancing time and increases the system performance with minimal components. The proposed topology has been theoretically analyzed and experimentally verified with a laboratory prototype. The proposed modularization technique is verified experimentally with two modules tested together in a battery string. © 2022 IEEE.Item Active Cell Balancing Circuit using Switched inductor Buck-Boost Converter for Li-ion Battery Strings with Maximum Efficiency Operation(Institute of Electrical and Electronics Engineers Inc., 2023) Manjunath, K.; Kalpana, R.An active cell balancing circuit with maximum efficiency operation using switched-inductor buck-boost converter for series connected battery strings is presented in this paper. The proposed balancing circuit has advantage over conventional balancing circuit, which is the ability to balance non-adjacent cells also. Moreover, it simplifies control complexities by utilizing one pair of complementary PWM signals to balance all the cells within the battery module. To form a single module with three cells connected in series, the proposed balancing circuit requires only two inductors and four switches. The analysis, modes of operation and control strategy of the proposed circuit are described in detail. The energy transfer with the efficiency of 97.7% is achieved with proposed balancing circuit. To verify the proposed circuit, MATLAB/Simulink platform is utilized and a laboratory prototype is developed. © 2023 IEEE.Item Two Stage Module Based Buck-Boost Converter for Cell Equalization of Series Connected Cells for Electric Vehicle Battery Pack Applications(Institute of Electrical and Electronics Engineers Inc., 2024) Nayak, A.K.; Kalpana, R.; Manjunath, K.In this paper, a two-stage module-based active cell balancing circuit using a buck-boost converter is proposed. In this technique cell balancing is performed by considering the State of Charge as a balancing criteria. Further to explore modified buck-boost converter topology with inductor and switches being used for balancing adjacent cells. An existing work of two stage module based cell equalization topology is referred. Such topology is aimed at increasing balancing speed by targeting two cells simultaneously. The topology uses fewer components than traditional balancing circuit. Proposed cell balancing is simulated by MATLAB/Simulink. The efficiency and time required for balancing is evaluated. An SOC based control is proposed instead of voltage based control in the proposed topology. Further the efficacy of such circuit in dynamic condition i.e. charging and discharging is evaluated through simulation. © 2024 IEEE.