Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"battery management system"”.
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Novel System Identification Techniques For Battery Management System
In this thesis, we presents a novel approach for system identification of a Li-ion batteries. First, we we present a robust approach to estimate the equivalent circuit model (ECM) parameters of a Li-ion battery that offers several advantages over existing ones. Particularly, (i) The proposed …
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Data redundancy reduction using sensitivity analysis method for machine-learning-based battery management system
… of machine-learning (ML) techniques in the battery management system (BMS). The novel approach analyzes the sensitivity of lithium-ion battery model parameters towards their discharge performances. The sensitivity analysis is based on the sum-of-difference method to identify redundant model …
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An Intelligent Lead Acid Battery Management System for Solar and Off-Peak Energy Storage
… of micro-girds which combine several localized systems into a small power network has drawn recent attention. They can operate either as a self-contained energy network or they can be integrated into a centralized power grid. A variety of technologies have been studied to use solar energy …
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The Development of a High-Performance Distributed Battery Management System for Large Lithium Ion Packs
<p>A high performance battery management system (BMS) for large capacity cells was designed, built, and tested in a cycle of three revisions. The BMS was designed for use in applications where the battery pack configuration is unknown: parallel, series, or any combination. Each of the cells is …
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Compact and efficient power electronics with applications to battery management systems
… circuits. Another area of research is on fast battery charging using active battery management system topologies. These topologies have been proven before but this work expands upon those by using modern power electronics techniques to minimize the size and maximize the efficiency. This is …
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Electrochemical Model Based Fault Diagnosis of Lithium Ion Battery
… of the electrochemical model of a Lithium-Ion battery having a LiCoO2 chemistry. Battery electrochemical model parameters are subject to change under severe or abusive operating conditions resulting in, for example, Navy over-discharged battery, 24-hr over-discharged battery, and over-charged …
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Active balancing of lithium-ion cells for maximum power discharging
… the driving range, charging capability, and the battery life. The Battery Management System (BMS) in any Lithium chemistry battery system is used to keep the cells in the optimal operating conditions. The BMS in standard EV batteries employ series cell balancing only while charging. The discharge …
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A hybrid battery cell voltage equalizer considering thermal behavior and capacity fade characteristics
… developing a robust, high-fidelity lithium-ion battery model adaptive to changes in operating temperature, aiming for accurate estimation of state of health (SOH). The thesis proposes two novel methods for lithium-ion battery SOH tracking and estimation using the developed battery model. …
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Design of the communication, power management and interchangeable sensor payload system for an inspection-class robotic platform
… platform with interchangeable payloads. The system was designed to create a 1:1 human-to-robot ratio which improves the efficiency of rescue operations. Once the operator has reached the inspection void, the Scarab is thrown in where the sensor stimulus from the inspection environment is …
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Internal resistance variances in lithium-ion batteries and implications in manufacturing
… of cycling, models the cycle life of a simple battery pack of two parallel-connected cells that start off as unbalanced, and validates it with experimental data from cycle life testing of parallel-connected LiFePO₄ cell groups. Experimental results from samples of commercially available cells …
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Battery Cell Monitoring Unit
… and temperature in a 12-cell 18650 lithium-ion battery module aims to be low-power, serving as the core of an energy-efficient battery management system and facilitating battery management functions with cell data. Notable features include a switchable voltage divider, a single op-amp …
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Vehicle Traction Battery Modelling
… has been gradually increasing. In order for the Battery Management System (BMS) to perform effectively, accurately, and efficiently depends on the accuracy of the battery model of the battery pack. The work performed in this thesis is to model the battery pack, both the electrical model and the …
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Electrifying a Jet Ski: Designing & Manufacturing an Electric Drivetrain for a Personal Watercraft
… older PWC with an electric motor and Lithium-Ion battery. I performed rigorous calculations to properly size a battery and motor to propel the watercraft. Upon learning to weld, build battery packs, and configure a battery management system, I prototyped extensively—iterating upon battery packs …
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Comparative Analysis of Coulomb Counting and Extended Kalman Filter for State of Charge Estimation in Battery Management Systems
… a measure of the amount of available charge in a battery cell. It is not possible to directly measure SOC because it is a function of the stoichiometric concentration of ions in the cell, hence current and voltage measurements were used to obtain the required accurate and precise estimation. …
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Modeling and control of fuel cell-battery hybrid energy sources
… development in the area of alternative energy systems. Among various alternative energy systems, fuel cells and batteries have attracted significant attention both in academia and industry considering their superior performances and numerous advantages. In this dissertation, the modeling and …
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Reduced-order modeling and adaptive observer design for lithium-ion battery cells
… modeling approach to Lithium- Ion battery modeling, as well as the application of adaptive observers to this structure. It begins by describing the fundamental problem statement of a battery management system (BMS), and why this is challenging to solve. It continues by describing, …
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The development of novel services for battery storage in domestic applications and communal mini-smart grids
Lithium-ion battery technology remains a key factor in energy storage technology due to its advantageous features which include high energy and power density, low self-discharge, and longer lifespan. However, the continuous cycling of the battery over its lifetime results in gradual internal …
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Estimating Cell Capacity for Multi-Cell Electrical Energy System
<p>A Multi-Cell Electrical Energy System is a set of batteries that are connected in series. The series batteries provide the required voltage necessary for the contraption. After using the energy that is provided by the batteries, some cells within the system tend to have a lower voltage than the …
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Online condition monitoring of lithium ion batteries by performing impedance spectroscopy using a DC-DC converter
… via the associated power converter in the battery management system. The technique implemented in this work is known as Electrochemical Impedance Spectroscopy (EIS). EIS is a well-known technique, that has been used to characterize an electrochemical cell’s behaviour and state by monitoring …
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Power Estimation for High-Performance Lithium-Ion Batteries
… perspective, accurately determining whether the battery pack can provide the necessary power for a given task is crucial for applications with high power demand. This critical information is computed by the Battery Management System (BMS) by employing State of Power (SOP) estimation algorithms, …
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