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 47 for “"Battery System"”.
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Design considerations and implementation of an electromechanical battery system
… implementation of a low cost electromechanical battery using an outside rotor permanent magent Halbach array with hybrid magnetic bearings and heat pipe cooling. The theoretical calculations include finite element analysis. A dipole Halback array produces a uniform flux distribution inside the …
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MATHEMATICAL MODELING OF LIAL/FES¬2 HIGH TEMPERATURE BATTERY SYSTEM
… lithium -aluminum, iron disulfide molten salt battery system. Multi-physics transport phenomena in the electrolyte, charge balances in the solid phases and electrolyte, complex multi-step electrochemical and chemical reactions in the electrodes are described in this model. The model includes …
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A combined classification and queuing system optimization approach for enhanced battery system maintainability
Battery systems are used as critical power sources in a wide variety of advanced platforms (e.g., ships, submersibles, aircraft). These platforms undergo unique and extreme mission profiles that necessitate high reliability and maintainability. Battery system failures and non-optimal maintenance …
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Modeling and Charging Control of a Lithium Ion Battery System for Solar Panels
<p>The advancement in solar panel and battery technology makes them useful for energy supply and storage. This thesis involves the modeling and charging control of a lithium ion battery system for solar panels. The proposed model is based on the parameters and characteristics of a realistic battery …
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System architecture decisions under uncertainty : a case study on automotive battery system design
… uncertainty is anticipated, as the high voltage battery pack hardware and control system architecture will experience multiple engineering development cycles in the next 20 years. Flexibility in product design could mitigate future risk due to uncertainty. By understanding the potential iteration …
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Bi-directional Flyback DC-DC Converter for Battery System of the DC House Project
… a certain time, a back-up energy source from a battery must be readily available to fulfill the house’s power needs. This thesis proposes a bi-directional flyback power converter to allow a single-stage power path to charge the battery from and to discharge the battery to the DC House 48 V …
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Improvements to a Bi-directional Flyback DC-DC Converter for Battery System of the DC House Project
… day. A back-up energy source in the form of a battery storage system must be available to meet the electrical needs of the house. A bi-directional flyback power converter was initially designed to allow a battery to charge from as well as discharge to the 48V bus line of the DC House. The …
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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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Implementation of battery energy storage system for the electricity grid in Singapore
… implementations. Among them, sodium-sulfur battery appears to be suitable for energy application while lithium-ion battery has the capability to meet power application requirement well. However, models based on the local electricity market in Singapore show that in order to be economically …
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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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Hybrid electric vehicle regenerative-braking using ultracapacitors
… presented. Proposed sizing of an ultracapacitor system is presented and discussed based on the available energy and the nominal operating voltage from a hybrid electric vehicle transit bus; A control scheme is required to effectively control the charge and discharge of the ultracapacitor system. …
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Performance Simulation and Powertrain Selection for an Electric Drift Trike Vehicle
… ratio for the vehicle. A motor controller and battery system are selected to match the requirements of the drive motor. System architecture and safety features of the trike’s electrical system are explained through the startup sequence and wiring diagram of the trike.
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A cost-effective battery management and monitoring strategy for micro-grids in India
… micro-grids and off-grid home electric systems have become popular in the developing world to help meet energy demands. These systems help provide electric power to customers when the main power utility is unable to do so, such as in rural communities or newly developed townships. …
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Modeling and design of semi-solid flow batteries
… model of the recently introduced semi-solid flow battery system is developed and applied to address issues with important design and operation implications. Because of the high viscosity of semi-solid flow battery suspensions, alternative modes of operation not typically used in conventional redox …
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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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Concept and feasibility study of self-organized electrochemical devices
Since Volta's discovery of " an electric battery" in 1800, advancements have proceeded due to great materials advances. However, the basic configuration he proposed then is still present in today's portable power sources. In this work, using attractive and repulsive London-van der Waals forces, a …
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Doped LiFePO₄ cathodes for high power density lithium ion batteries
… limits its applicability in commercial systems. Through a doping process, however, its electrochemical performance at high current rates can be improved to levels above that of commercially available lithium batteries. The increase in performance is brought about by a concurrent increase …
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Technical and economic feasibility of a high-temperature self-assembling battery
A conceptual high-temperature battery system for large-scale grid power applications was proposed, described, and evaluated. Unlike conventional battery technologies whose maximum current rate is constrained by at least one solid phase, the novel three-layer liquid-phase …
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Energy use analysis and technology for electric transit buses
… the on-board engine to the electrical generation system. The Canadian electrical generation mix has a significant portion of low carbon and renewable sources. This low environmental impact source of energy is then transferred to electric vehicles when they are charged from the grid. This thesis …
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