AN INNOVATIVE MODELING AND CHARGING SCHEME FOR A LI-ION BATTERY STACK

dc.contributor.authorPoloei, Fereshteh
dc.contributor.departmentElectrical and Computer Engineering
dc.contributor.supervisorBakhshai, Alireza
dc.date.accessioned2024-04-09T19:24:04Z
dc.date.available2024-04-09T19:24:04Z
dc.date.issued2024-04-09
dc.degree.grantorQueen's University at Kingstonen
dc.description.abstractOne of the main challenges in power electronic applications is Battery Management System (BMS) that covers battery modeling, charging estimation, and charging control. Lithium Ion (Li-ion) batteries offer uncontested advantages over other types of batteries. They are used in many electronic devices such as cell phones, cameras, laptops, and are an important part of stand-alone wind and solar systems, smart grids applications, and Electric Vehicles (EVs). The goal of a battery management system (BMS) is to optimize the battery’s lifetime while improving the system’s stability, reliability, and cost. Among the factors involved in the battery management system (BMS), State of Charge (SOC) estimation and Charging Equalization (CE) among a set of batteries are of importance greater than the others. An appropriate and accurate modelling of the battery combined with an accurate and fast estimation scheme are required for a good estimation of the battery’s state of charge (SOC). In terms of charging equalization, the efficiency, modularity, algorithm simplicity, CE time, minimum added elements and cost, and maximum possible operation modes involved during CE process should be considered to have a more practical and advantageous CE method and topology. This research focuses on developing a new modelling and SOC estimation technique for Li-ion batteries as well as introducing a novel charging equalization algorithm and topology for all possible operation modes in a battery stack. This research work introduces a comprehensive but simple model for the battery and a novel accurate, fast, and online estimation method for a Li-ion cell and then proposes an innovative advantageous balancing algorithm that includes all modes of operation for a battery stack. Our proposed CE algorithm can not only balance the charge among the modules in the battery stack when it is connected to the grid, either in charging or discharge mode. It is also capable of charge equalizing when the battery stack is disconnected from the grid. This unique feature of our proposed method prolongs the battery life and improves the performance in a modular battery system. The proposed modelling and charging schemes are validated through comprehensive simulations and experimental results.
dc.description.degreePhD
dc.embargo.liftdate2029-04-05
dc.embargo.termsRestricted from publication (Pending for the continuing research)
dc.identifier.urihttps://hdl.handle.net/1974/32856
dc.language.isoeng
dc.relation.ispartofseriesCanadian thesesen
dc.rightsQueen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canadaen
dc.rightsProQuest PhD and Master's Theses International Dissemination Agreementen
dc.rightsIntellectual Property Guidelines at Queen's Universityen
dc.rightsCopying and Preserving Your Thesisen
dc.rightsThis publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.en
dc.subjectElectric Vehicles
dc.subjectSOC
dc.subjectBattery Management System
dc.subjectCharging Equalization
dc.titleAN INNOVATIVE MODELING AND CHARGING SCHEME FOR A LI-ION BATTERY STACK
dc.typethesisen
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