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Recovery Of Lithium From Waste Water By Sodium Carbonate
Báňa, Jiří ; Kazda, Tomáš ; Šimek, Antonín ; Čech, Ondřej
Lithium-ion batteries are growing in production, thanks in large part to the rise of electromobility. In the future, every battery for electromobility will have to be recycled at the end of its life with a recycling efficiency of over 70 %. In the case of hydrometallurgical recycling methods and underwater crushing, some lithium is remaining in waste water. Efficient recovery of lithium from wastewater can mitigate the need for lithium mining. In this paper, we focus on the recovery of lithium carbonate from wastewater by thermal precipitation and crystallization of waste lithium using sodium carbonate.
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Lithium-ion battery SOH analysis
Sedlařík, Marek ; Kazda, Tomáš ; Vyroubal, Petr
Battery State-of-Health modelling can significantly reduce the amount of costly laboratory tests in the application being analyzed. This paper discusses the prediction of the State-of-Health, an indicator of battery life, using support vector regression. This experiment is performed on a sample cell of a lithium-ion battery, which is subjected to a method known as the Constant Current Constant Voltage method, where the battery is charged and discharged at a constant current of 0.5 C. Although this method in this paper is applied in laboratory conditions and it is a controlled method, or it deviates from the battery cycling of real applications, it can be used in these applications, thus the scope of this research can predict the State-of-Health also in the areas of batteries used in mobile devices or electromobility. The State-of-Health indicator then determines whether the battery is still suitable for that primary application. Assuming that we can predict this parameter with some accuracy, it is then also possible to tell after what length of time a battery will need to be replaced and when it will be suitable for secondary applications such as stationary storage. Once it reaches that state, this calculation can be further applied to those applications as well.
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Fire of batteries in electric vehicles
Blažek, Štěpán James ; Sitek, Tomáš (referee) ; Preisler, Lukáš (advisor)
This bachelor thesis deals with the causes and formation of fires in electric vehicle batteries. The first part summarizes the theory related to types of batteries, used materials, and reviews the phenomenon known as Thermal runaway. The second part of the thesis describes the burning of electric vehicles, providing basic categorization of fire occurrence in electric vehicles and the phenomena accompanying them. The statistical comparison of the current and future development of the number of fires in electrically powered vehicles in the Czech Republic compared to conventional combustion engines, data analysis, and recommendations are summarized in the final part of the bachelor thesis. From the given statistics, it is evident that an electric vehicle is less likely to catch fire, however, it is acompanied by the release of hazardous gases, creating a significant challange in terms of fire extinguishing.
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Li-ion battery model
Loucký, Vojtěch ; Toman, Marek (referee) ; Cipín, Radoslav (advisor)
This diploma thesis deals with description of the principle of Li-ion cells, literature search on the topic of mathematical models of Li-ion cells and the creation of a selected mathematical model in MATLAB, which is able to simulate the course of voltage and state of charge as a function of time for different ambient conditions, such as various aging of battery .The creation of both the model and the procedure of identification of parameters necessary for the creation of the model are described here as well as different options of identification of parameters. The selected Thevenin model is then compared with the real course and the accuracy of the model is evaluated with respect to the measured course.
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FLATcon system – flat control system with RF communication
Krivoklatský, Filip ; Arm, Jakub (referee) ; Bradáč, Zdeněk (advisor)
This bachelor’s thesis discusses solutions of smart houses. It presents some of the available solutions on market and points out its positives and negatives. The thesis itself focuses on solutions which support wireless communication. Subsequently, the design of custom solution named FLATcon is being proposed. It includes designing of central unit, which is the main part of the system. First, the hardware part is being designed. Base of this is minicomputer Raspberry Pi 3 B with necessary inputs and outputs. Uninterruptible power supply and wireless communication interface are also part of the design. Subsequently, thesis focuses on control software design and on user interface in form of web server. At the end of this thesis, achieved results are presented.
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Nanofibrous Separators for Lithium-Ion Batteries
Pléha, David ; Míka, Martin (referee) ; Janderka,, Pavel (referee) ; Novák, Vítězslav (advisor)
Nanofibrous separators use in lithium-ion batteries brings many advantages. In contrast to contemporary used commercial separators, nanofibrous ones exhibit higher temperature resistance,ionic conductivity and higher electrolyte uptake. Better ionic conductivity is ensured by porous structure and large specific surface. Fibers creates channels for the ionic species motion. Amorphous texture of nanofibers allows quick lithium ionic species motion within the polymeric matrix of separator. Furthermore, these separators exhibit higher volume of uptaken electrolyte. Further advantage of electrospinned nanofibrous separators are both high porosity and chemical stability.
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Compatibility of negative electrode materials at system of lithium-ion battery
Šikuda, Milan ; Sedlaříková, Marie (referee) ; Libich, Jiří (advisor)
This thesis deals with a study of lithium-ion batteries. It is focused into negative electrode materials and electrolytes. In this thesis is presented synthesis, electrochemical properties, possibilities to improving negative electrode materials as LTO (Lithium Titanate Oxid) and graphite. These electrode materials were investigated with respect to their compatibility at electrolytes with carbonate solvents, Sulfolane and DMF (DiMethylFormamide) in detail. The main aim of this thesis is to characterize electrode materials and electrolyte properties depending on wide range of temperatures and their comparison for the purpose of achievement of the best solution. The thesis is divided into two main parts. The theoretical part of thesis describes composition, process of synthesis and analysis of lithium-ion cell. Practical part contains measuring and evaluating of charge-discharge and irreversible capacity characteristics related to variety of environmental temperatures.
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Design of electric sport car
Zdvyhal, Milan ; Zdařil, Zdeněk (referee) ; Karásek, David (advisor)
This diploma thesis deals with the actual problems of sports car. This project solves the basic question of the future ecological cars drive and deals with problems related to ergonomics adherent to this type of car. The work includes a detailed retrieval study of the issue followed by the procedure of designing the car. The conclusion of the thesis deals with the detailed description and an analysis of the concept from several points of view. This thesis is also supplemented by preview of po-sters and multimedia presentation for 3D virtual reality.
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