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Negative Electrode for Sodium-ion batteries
Šimek, Antonín ; Bača, Petr (referee) ; Libich, Jiří (advisor)
This master’s thesis is focused on the research of negative electrode materials for sodium-ion batteries. It contains a general introduction to the issue of batteries, their brief historical development, basic operating principles, key parameters and classification. Attention is paid to lithium-ion batteries, which are the most used technology today. Sodium-ion batteries as their potential replacement, especially in the field of energy storage from renewable sources, are based on lithium-ion technology. Promising candidates for the material for the negative electrode of sodium-ion batteries are sodium titanates. Their synthesis and subsequent electrochemical characterization of electrodes using sodium titanate as the active material are included in the practical part of this work.
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Airplanes powered by eletric energy
Behúl, Michal ; Hlinka, Jiří (referee) ; Bencalík, Karol (advisor)
The aim of this bachelor’s thesis is electric propulsion used in airplanes and overview of airplanes with this kind of propulsion. Thesis is divided into three main parts. First part describes electric propulsion systems, mainly descriptions of batteries. Second part describes chosen airplanes with electric propulsion in use and promising prototypes still in development. Third part is construction design of electrical propulsion system with 50 kW motor, mainly focusing on computing needs for batteries.
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Soldering gun with Li-Ion battery supply
Bartoš, Miroslav ; Vorel, Pavel (referee) ; Martiš, Jan (advisor)
This master‘s thesis deals with the design of battery powered soldering iron. The soldering iron will be placed in the plastic box from a conventional transformer soldering iron. First, we need to find the parameters of the original transformer soldering iron. Then design a synchronous step-down converter, driver of converter, BMS circuits, and component placement in a plastic box. The battery-powered soldering iron was successfully revived and tested, the final parameters of the converter are: voltage 0.4 V at 80 A current. The total power on the soldering wire is 32 W. Technically, this is a very interesting alternative to the classic version of the soldering iron, which can be used for assembly or repairs in poorly accessible locations.
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Recycling modern cars
Borik, Matúš ; Charvát, Pavel (referee) ; Štětina, Josef (advisor)
Zem čelí nadmernému prekračovaniu recyklačných limitov organických a anorganických surovín, čo spôsobuje nedostatočnú absorpciu skleníkových plynov. Automobilový priemysel sa v posledných desaťročiach rapídne rozbehol a má na tom svoj podiel. Významný negatívny vplyv na rast výroby automobilov má ťažba zdrojov, ktorá prináša niekoľko environmentálnych problémov, ako je vyčerpanie zdrojov, neudržateľnosť životného prostredia, ktorá vedie ku globálnemu otepľovaniu, a zdravotné problémy spojené s ťažbou zdrojov a výrobou automobilov. Ak sa má udržať úroveň používania automobilov, hlavným riešením je zamerať sa na recykláciu a výrobu ekologických vozidiel. Výskum recyklačných metód moderných vozidiel a ich analýza je zameraním tejto bakalárskej práce, ktorej konkrétnym cieľom poskytnúť náhľad rôznych typov recyklačných postupov. Prvá časť sa zaoberá všeobecnými princípmi recyklácie a recykláciou vozidiel po častiach. Následne práca presúva svoju pozornosť na obnoviteľné zdroje a ich využitie v automobilovom priemysle (elektromobily) a recykláciu moderných automobilov vyradených z prevádzky. Posledná časť prináša bližší pohľad na možnosti skladovania energie z obnoviteľných zdrojov, špecificky na vodíka (H2), jeho využitie v palivových článkoch, recykláciu vodíkových automobilov a budúcnosť pohonu. Práca konzultovaná s expert inžinierom danej oblasti.
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Design of an integrated self-sufficient residential house
Klouda, Jan ; Jaššo, Kamil (referee) ; Libich, Jiří (advisor)
The thesis deals with the design of an integrated island system for control and power supply of a residential house. The aim of the thesis is to develop a design for this self-contained islanded power supply, and to evaluate the proposed system from different perspectives. The thesis is divided into two parts. The first part is made by researching the possible solutions of a self-sufficient power supply for a residential house. This research contains mostly available technologies in the Czech Republic, and deals only with the domestic market. In the first part, different relevant methods of electricity generation, processing and storage are described. Then, the different technologies are described in detail and compared in order to achieve the highest possible economic, environmental and social compatibility. In the second part, the different technologies are implemented on the defined house to create a design for a self-sufficient house. This design includes several simulations and the selection of the most appropriate technologies. The resulting design is also compared with an already built self-sufficient house.
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Battery storage with second life cycle batteries
Král, Dominik ; Pazdera, Ivo (referee) ; Procházka, Petr (advisor)
The bachelor thesis deals with problems related to the solution of energy storage. It deals with the analysis of used types of accumulators, deals with their advantages, disadvantages, on what principle they work. It focuses on the possibilities and problems of using batteries in the "Second life" mode. It presents the subsequent process of preparing batteries for further application and defines the tests necessary to evaluate the condition of batteries before further use. Finally, the actual energy storage designs and the block topology of the energy storage are presented.
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Design of a calorimeter to characterize the properties of commercial batteries
Gavalierová, Veronika ; Šedina, Martin (referee) ; Kazda, Tomáš (advisor)
This thesis is focused on the study of the heat capacity of Li-ion cells. The theoretical part contains the basic issues of the technology, basic concepts, and knowledge. The next chapter, the practical part, is devoted to the practical measurement of the specific heat capacity of batteries, using a calorimeter. Various types of batteries were investigated, and a larger calorimeter was also constructed and described. This bulkier calorimeter was used for a larger pouch cell.
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Analysis of critical battery parameters for space applications
Šimek, Michal
This thesis deals with the analysis of lithium-ion batteries from the point of view of temperature. The aim is to find out at which temperature and C value the lithium plating process starts in the battery by means of non-destructive methods. This process is undesirable for the functioning of lithium-ion batteries as it causes capacity reduction and cell degradation. In this study, commercial cells from GOMspace were selected as the test batteries. GOMspace will be able to use the results of the research to optimize its devices while avoiding lithium plating, which will increase battery life.
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Problematika rozvoje elektricky poháněných vozidel kategorie M1 v České republice
KLÍMA, Denis
In the order of the last few decades with internal combustion engines dominating the passenger transport sector, the electric car now appears to be on the verge of a rapid rise in both developed and emerging automotive markets. The broad application of the electric vehicle could bring about significant changes for society, not only in terms of the technologies we use for passenger transport, but also move our economy away from oil and attempt an environmental footprint in the transport industry by reducing emissions. This work is mainly concerned with electric mobility, its development, but also its issue of development in the Czech Republic, as well as charging infrastructure and its near future for electric mobility. The potential for an electric vehicle will be limited without paying sufficient attention to standards, not only in terms of the speed of its adoption and the fluency of this transition, but also in terms of maintaining compatibility between professional powers, public safety and helping to ensure eco-bikes.
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Numerical modelling of Li-S batteries
Mezera, Petr ; Jaššo, Kamil (referee) ; Mačák, Martin (advisor)
This work deals with modeling and simulation of Li-S batteries in Matlab. The work describes the properties of these batteries, their construction and the problems associated with their development. Furthermore, experimental techniques and their importance for numerical modeling of batteries are discussed. Different types of battery modeling are described in the work, then numerical models for simulations are analyzed in more detail. The procedure for making the Li-S battery is described and the measurements made on it are described. The measured data has been adapted for use in several different ECMs. Finally, models of a replacement circuit for the Li-S battery were built. One model accounted for the polynomial equations and the other the resulting circuit. The latter used linear interpolation and was more accurate.
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