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 45 for “"battery packs"”.
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Optimization of blended battery packs
This thesis reviews the traditional battery pack design process for hybrid and electric vehicles, and presents a dynamic programming (DP) based algorithm that eases the process of cell selection and pack design, especially for blended battery packs (those containing two or more different energy …
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Propulsive Battery Packs Sizing for Aviation Applications
… analytical methods for sizing the propulsive battery packs for designing an electric-driven aircraft. Lithium-Ion (Li-Ion) battery is the primary choice of battery cell chemistry in this thesis research due to its superior specific energy and market availability. The characteristics of …
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It's getting hot in here : temperature gradients in lithium-ion battery packs
A 5 channel, 40A battery cycler was constructed for the purpose of carrying out thermal studies on Lithium-ion battery packs. Boston Power Swing Key 442 battery blocks were tested to determine the magnitude of the temperature gradient over the pack. The battery blocks were stacked vertically, …
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Experimental and Modeling Study of the Thermal Management of Li-ion Battery Packs
… study of the thermal management of Li-ion battery packs under the context of electric vehicle (EV) or hybrid EV (HEV) applications. Li-ion batteries have been extensively demonstrated as an important power source for EVs or HEVs. However, thermal management is a critical challenge for their …
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Development and analysis of techniques to improve air-cooling and temperature uniformity in battery packs
… temperature, and temperature uniformity of the battery pack and the cell within the operating limits. In this study, a novel concept has been developed to improve air-cooling and temperature uniformity in a simple battery pack by incorporating inlet plenum, jet inlets, and vortex generators. The …
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A Single-Frequency Impedance Diagnostic for State of Health Determination in Li-ion 4P1S Battery Packs
… for determining the safe operating area of a battery cell and battery packs to avoid abuse and prevent failure and accidents. A series of experiments were performed to evaluate the performance of a 4P1S battery array using electrochemical impedance spectroscopy to identify key frequencies that …
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Design and Simulation of Passive Thermal Management System for Lithium-Ion Battery Packs on an Unmanned Ground Vehicle
… response of a 15-cell, 48 volt, lithium-ion battery pack for an unmanned ground vehicle was simulated with ANSYS Fluent. Heat generation rates and specific heat capacity of a single cell were experimentally measured and used as input to the thermal model. A heat generation load was applied to …
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A comparative analysis of air and liquid cooling techniques for battery packs with machine learning insights into immersion cooling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Aviation Propulsive Lithium-Ion Battery Packs State-of-Charge and State-of-Health Estimations and Propulsive Battery System Weight Analysis
<p>Aviation propulsive battery pack research is in high demand with the development of electric and hybrid aircraft. Accurate inflight state-of-charge and state-of-health estimations of aviation battery packs still remain challenging. This thesis puts efforts on estimating the state-of-charge, …
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Techno-economic modelling and optimization of second life battery packs, with a particular focus on accommodating inhomogeneities and module-to-module variations
… of an optimized controller for second-life battery (SLB) packs, integrating heterogeneous State of Health (SOH) modules. The study begins by identifying prevalent lithium-ion battery chemistries and establishing a comprehensive modelling framework. Performance characterization is conducted …
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Development and modeling of novel battery thermal management systems for electric and hybrid electric vehicles
… temperature of the lithium ion batteries in battery packs for electrical and hybrid electrical vehicles. This thesis studies, develops and models novel battery thermal management systems for the battery packs in hybrid electric vehicles and electric vehicles. The systems’ thermal performances …
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Optimizing hybrid vehicles : battery pack design, energy management, and collaborative learning
… are all focused on hybrid vehicle optimization: battery pack design for low cost thermal management, energy management of blended battery packs for weight minimization, and collaborative learning for improved energy management. The outputs of this thesis include insights into the minimization of …
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High voltage sampling scheme independent of capacitor voltage coefficient for a delta sigma modulator
… for safe and effective monitoring of large battery packs. This paper presents a unique sampling scheme for a delta sigma modulator that is independent of common mode voltage. The rejection of common mode voltage is important in the application of electric vehicles and other large battery …
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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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Caratterizzazione e massimizzazione dell'efficienza di impianti di produzione di energia elettrica da fonti rinnovabili tramite l'utilizzo di elettronica di potenza distribuita ed integrazione di sistemi di storage
… storage systems (ESS) realized with several battery packs. The approach is the implementation of innovative energy management strategies supported by suitable models for both PV field and storage system. In particular, a behavioural model is applied to large PV plants. This model is built in …
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Development, Characterization, & Implementation of Phase-Change Material Cold Plates for Hybrid-Electric Vehicle Battery Systems
… of hybrid and electric vehicles with large battery packs as Energy Storage Systems (ESS) capable of long ranges and decreased emissions. These battery packs output large heat loads during charge-depletion mode and currently require active cooling to keep the batteries within operating …
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Design and development of exclusive modulation techniques for effective power regulation in dual two-level-inverter-fed open-ended winding traction motors
… inverter topology, fed from isolated DC sources (battery packs) can be a suitable preference for the multilevel inverter in EVs. However, in this topology, the isolated DC sources obtained from battery packs may have different charge or capacities due to their manufacturing tolerances and aging …
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A hardware-anywhere-in-the-loop simulator for dynamic real-time analysis of electric propulsion systems
… a real-time operating system. The vehicle’s battery pack is both modeled in simulation and interfaced externally, providing the option of establishing a baseline performance in the simulation, and then evaluating candidate battery packs against these results. This simulation test bed is …
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The lithium-ion battery industry for electric vehicles
… climate change, and soaring energy demand. The battery component will play a key role in the adoption of these vehicles as it defines their cost, range and safety. Advances in lithium-ion battery technology are creating possibilities for electric vehicles to compete with their gasoline …
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Modeling techniques and control strategies for inverter dominated microgrids
… parallel to renewable energy sources as well as battery systems. The main contributions of this work comprise of: The analysis of detailed models and control structures of grid inverters, synchronous generators and battery packs and the utilization of these models to formulate control strategies …
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