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 Model"”.
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Advanced Modeling and Control Strategies for Charging Electric Vehicle Batteries
… in this master's thesis presents an advanced modeling and control strategy for charging electric vehicle (EV) batteries. The purpose of modeling the battery incorporating the optimal control mechanism is developing a fast-charging system for EVs. The thesis starts with a literature survey to …
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Hybrid Electric Power System Validation through Parameter Optimization
<p>Battery models can be developed from first principles or from empirical methods. The work presented in this thesis is semi-empirical, the model was validated using test data through parameter optimization. Simulink Parameter Estimation toolbox was used to identify the battery parameters and …
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Optimisation of battery operating life considering software tasks and their timing behaviour
The battery operating life of embedded systems is to be optimised. This thesis considers multiple independent software tasks that are assigned the same processor, with a battery as power supply. The tasks are supposed to have hard deadlines and are to be scheduled earliest deadline first (EDF). …
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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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Battery Pack Design and Transient Performance Modeling for High-Power Legged Robots
… optimization-based control methods, such as Model Predictive Control (MPC), to generate agile and energy-efficient locomotion. By casting the control problem as an optimization task, robotic systems can account for complex robot dynamics and operational constraints, including joint limits and …
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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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Advances in Lithium Ion Batteries Obviate Need for Ultracapacitors in Electric Vehicles
<p>Battery technologies are rapidly obviating the need for battery/ultracapacitor (UC) hybrid circuit topologies (active/passive) in electric vehicles (EV). In this paper, available models in MATLAB/Simulink are used to assess the need for lithium ion battery/ultracapacitor hybrid topologies. The …
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Nuclear Batteries with Tritium and Promethium-147 Radioactive Sources
… In spite of relatively low power, the nuclear battery with packaging can have an energy density near a thousand watt-hours per kilogram, which is much greater than the best chemical battery. Moreover, radioactive isotopes are available on the market for reasonable prices and low power …
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Simplified electric vehicle powertrain modelling
… driven the requirement for simplified powertrain models. In this thesis, a simplified electric vehicle powertrain (SEVP) model, which calculates energy consumption for a battery electric vehicle (BEV) based on the minimum number of published vehicle parameters, is presented. The SEVP utilises …
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Towards an Intelligent Energy Monitoring System for Autonomous Underwater Vehicles
… energy use. We also examine the development of a battery model for the AUV, and test this model under simulated and real world conditions. We also develop a model for predicting future energy states, and evaluate this model using real world trials.
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Optimization of the Control Strategy for a Range Extender Vehicle
… a gasoline combustion engine, a high voltage battery and two electric motors. One electric motor propells the front axle and the other one is connected to the combustion engine to generate electric power. The control is restricted by customer requirements due to the concept of the vehicle. A …
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Modeling the impact of battery degradation within lifecycle cost based design optimization of heavy-duty hybrid electric vehicles
… on HEV powertrain design have either ignored battery degradation, or failed to holistically capture its impact from a lifecycle cost perspective. The focus of this effort is the development of a model-based framework that enables parametric optimization of the design and control of hybrid …
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Fractional modelling of rechargeable batteries
To develop a compact battery model, many authors begin by measuring the impedance of a battery over a frequency range of interest. Most of the models in the literature are either Thevenin-style or Randles’ model consisting of one or two RC networks and sometimes a Warburg element. These models are …
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Multiscale Modeling, Reformulation, and Efficient Simulation of Lithium-Ion Batteries
… of applications. In order to engineer improved battery design and develop better control schemes, it is important to understand internal and external battery behavior under a variety of possible operating conditions. This can be achieved using physical experiments, but those can be costly and …
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Advanced battery modeling for interfacial phenomena and optimal charging
… rate and enhanced safety for lithium-ion battery (LIBs) are urgently needed. To solve these challenges, the relevant physics at different length scale need to be understood. However, experimental study is time consuming and limited in small scale’s study. Modeling techniques provide us …
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Design of a parallel-series hybrid electric vehicle using multi-objective optimization techniques
… drive unit. The results of constant current battery tests on several lead-acid batteries, namely Eastern-Penn RV31, Delco Voyageur 27FMF, Chloride 6EF7, Optima 800, and Eastern-Penn RV27 are presented. Furthermore, constant power tests results for two nickel-cadmium batteries (Saft Nife …
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A comparison of parallel Gaussian elimination solvers for the computation of electrochemical battery models on the cell processor
… a certain number of charge/discharge cycles, the battery will fail. In lead-acid batteries, one of the major phenomenon that promotes battery failure is the development of a non-uniform concentration gradient of electrolyte along the electrodes' height. This phenomenon is known as electrolyte …
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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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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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Modeling of Electronic and Ionic Transport Resistances Within Lithium-Ion Battery Cathodes
In this work, a mathematical model is reported and validated, which describes the performance of porous electrodes under low and high rates of discharge. This porous battery model can be used to provide researchers a better physical understanding relative to prior models of how cell morphology and …
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