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USB battery tester
Andrysík, Lukáš ; Langhammer, Lukáš (referee) ; Lattenberg, Ivo (advisor)
This bachelor's thesis contains construction of battery tester along with primary and secondary cells comparsion. It consists of four parts - the first one focuses on general description of the most commonly used electrochemical cells, their characteristics, advantages and disadvantages. Second one relates to design a custom equipment for testing these cells including software, parts values calculations and common problems with the design. Third part is mainly about mechanical design and PCB manufacture. The last section is devoted to comparsion of several models of cells in terms of capacity and performance under different conditions.
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Design of Electric Scooter for Urban Mobility
Maca, Jakub ; Chorý, Tomáš (referee) ; Křenek, Ladislav (advisor)
The main aim of this thesis is to design electric scooter, which is ideally adapted for urban mobility and which will be a practical, attractive and environmental friendly alternative to the car with a combustion engine. Emphasis is given to proposal of ergonomic, aesthetic and functional solution of the system, which makes that scooter can be folded into a mobile compact shape. Folded scooter can be carried at public transportation vehicles and park right at home or in the office. The unique design and practical features of a scooter should be attractive not only in terms of personal mobility, but also as a utility vehicle for private companies and public institutions.
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Carbon materials for power sources
Tichý, Jiří ; Novák, Vítězslav (referee) ; Barath, Peter (advisor)
This work deals with carbon materials and using them in alternative energy sources. Object of this work was prepared electrodes with carbon materials and investigate their electrical properties. The practical part objects of the carbon materials, their properties and application in fuel cells and Ni-Cd batteries. Analysis describes the electrochemical processes in electrode materials with carbon as conductive element.
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Stability of cathode materials for Li-ion accumulators
Janíček, Zdeněk ; Libich, Jiří (referee) ; Sedlaříková, Marie (advisor)
This diploma thesis focuses on study of positive electrode materials for Li-Ion batteries. Our aim are intercalation materials whose are really perspective materials whose are widely used in this case. The theoretical part of my thesis focus on basic study of Li-ion batteries and their parameters. We studied charging and discharging processes. AFM and SEM were used as additional techniques for study LiCoO2 a Li0,975K0,025CoO2. We tested lifetime and stability of electrode as a perspective material for electrode for Li-ion batteries.
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Control algorithms for e-car
Hrazdira, Adam ; Fiedler, Petr (referee) ; Zezulka, František (advisor)
Cílem práce byl návrh a implementace řídicích algoritmů pro optimalizaci spotřeby energie elektrického vozidla. Hlavním úkolem byla optimalizace rozložení energie mezi hlavním zdrojem energie (bateriemi) a super-kapacitory v průběhu jízdního cyklu. Jízdní výkonový profil je odhadován a předpovězen na základě 3D geografických souřadnic a matematického modelu vozidla. V první části jsou uvedeny komponenty vozidla a jejich modely. Poté jsou představeny algoritmy na základě klouzavého průměru a dynamického programování. Byly provedeny simulace a analýzy pro demostraci přínosů algoritmů. V poslední části je popsána Java implementace algoritmů a také aplikace pro operační systém Android.
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Carbon materials for power sources
Tichý, Jiří ; Bača, Petr (referee) ; Novák, Vítězslav (advisor)
This work deals with carbon materials and using them in electrochemical energy sources. Object of this work was to prepare carbon materials and investigate their electrical properties. The theoretical part objects of the carbon materials, their properties, application in electrochemical energy sources and measurement methods used in experimental part. Experimental part describes the preparation of the electrodes with various carbon materials and summarizes the results of measurements.
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Lithium Sulphur Batteries
Juračka, M.
S+C cathode material was prepared by simple solid-state reaction in ball mill. Content of sulphur was approximately 80 wt. % in final sample. Cyclic voltammetry and galvanostatic charge/discharge techniques were used for characterization of the samples. Initial discharge capacity observed for S+C sample was 600 mAh/gsulfur. Capacity loss for S+C sample after 30th cycles was 66 %. Cycling loss is due to insoluble polysulfide formation. In this paper I present fundamental characteristics of Li-S batteries. This paper presents a principle of Li-S batteries, fundamental measurement and their evaluation. I present the techniques of measurement and preparation of cathode materials.
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Sodium ion batteries and gel electrolytes
Gottwald, T.
This work deals with the elecdrode materials and gel electrolytes suitable for sodium-ion batteries (Na-ion batteries). In the field of electrode materials were investigated carbon materials based on CR5995 with added SUPERp or NanoTubes for better conduction end LTO material boath working on the principle of insertion of sodium ion in to the electrode material structure. Another part witch this work deals are gel electrolytes for using in this Na-ion batteries, focused on the preparation and subsequent electrochemical and conductivity characterization of gel polymer electrolytes.
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