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Accumulation of electricity for a source with unstable production
Petrenec, Jan ; Milčák, Pavel (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with possibilities of accumulation of electricity generated by renewable sources with unstable production. Several goals were set by an assignment of this thesis. Within a research, current trends of the accumulation are presented in detail on examples of specific representatives with their technical parameters and economic possibilities. Further, an unstable source of electricity – the wind farm of three power plants Multibrid 5000 with all its parameters and operational details is defined for purposes of individual designs of accumulation systems. Firstly, the detailed design of an advanced compressed air energy storage (A-CAES) is realized. It includes a thermodynamic calculation of chosen components, their partial technical solutions, a financial evaluation of investment and a determination of theoretical payback period. Furthermore, the design for accumulators Tesla Powerpack is realized. It contains a calculation of individual system parameters, a financial evaluation of investment and a determination of theoretical payback period. Last part of the thesis is dedicated to a comparison and an evaluation of the achieved results of both realized methods of the electricity accumulation. In the end, A-CAES is chosen as more perspective variation.
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Electromobility, infrastructure solutions for homes and companies
Ďuračka, Samuel ; Mauder, Tomáš (referee) ; Štětina, Josef (advisor)
Goal of this bachelor’s thesis is an elaboration of an overview of the current state of knowledge in the area of various ways of charging electric vehicles, home charging stations, and battery storages issues. First part of the thesis is focused on brief history of electromobility, its decline, and consecutive recent growth. Second part of the thesis deals with charging in households realized by wallbox, and its benefits. Another topic is electric vehicle batteries and their utilization outside the electric vehicle, both during their cycle life, and after it stops being useable in electric car. In the end of the thesis, there is a recommendation of suitable charging station for Institute of Automotive Engineering FME.
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Gel Polymer Electrolytes Based On MMA With Ionic Liquids
Jahn, Michal
Gel polymer electrolytes are perspective electrolytes for new types of Li-ion batteries today. The properties respectively advantages of these gels can be used also in other fields of electrochemistry. Very promising combination can be electrochemically stable polymers and ionic liquids, which are substances that consist of an organic cation and an inorganic or organic anion, with a melting point below 100 °C. Main advantages of ionic liquids are high ionic conductivity, inflammability and excellent electrochemical stability. These ionic liquids may be suitable for new lithiumion batteries and supercapacitors, especially where the required higher thermal stability. In this paper, I will present fundamental characteristics of gel polymer electrolytes with ionic liquids.
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Study of life cycle of the accumulators
Babieska, Lukáš ; Binar, Tomáš (referee) ; Kazda, Tomáš (advisor)
This bachelor work deals with monitoring the life cycle of a lithium-ion battery. The theoretical part describes the history and development of electrochemical cells. Lithium-ion batteries are a separate chapter. There are described their principles, the most used materials for the production of negative and positive electrodes, loading characteristics and the influence of temperature. In the practical part, the influence of temperature on changes of internal impedance, cell capacity and efficiency of energy supply during the battery life cycle is monitored.
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LiFePO4 battery with BMS circuits for a battery drill
Fiala, Václav ; Červinka, Dalibor (referee) ; Vorel, Pavel (advisor)
This bachelor thesis deals with problematics of lithium accumulators. There are listed properties and practical use of lithium accumulators. There is also the chapter of lithium-ion-iron-phosphate accumulators, which will be a practical part of this thesis Next part of the thesis solves a safety electrical circuit system for new lithium batteries which will be able to protect batteries against overcharging or undercharging. In the practical part of the thesis new LiFePO4 batteries for the cordless drill were designed. Also, the mentioned safety electrical circuit was designed and tested.
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Evaluation Of Temperature Influence on Lithium-ion Battery Properties
Zachová, Zuzana ; Libich, Jiří (referee) ; Bača, Petr (advisor)
This diploma thesis deals with monitoring of the influence of temperature on the properties of lithium-ion batteries, especially on the safety and capacity of selected batteries. Chapters 1 and 2 contain a literature review on the subject, describing electrochemical energy sources, especially secondary accumulators, mainly lithium-ion cells. Furthermore, the safety and degradation processes of lithium-ion batteries are discussed and the third chapter describes the design of experiments, realization and outputs of these experiments.
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Modern technologies for self-sufficient houses
Popara, Nikola ; Chýlek, Radomír (referee) ; Špiláček, Michal (advisor)
The bachelor thesis deals with modern technologies for self-sufficient houses. In the theoretical part of the thesis individual energy sources are explained. Sources of energy are divided in two major groups and that is source of heat and source of electrical energy. In the next part of my thesis cost of energy sources from different companies is calculated.
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