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Microprocesor controlled charger
Husník, Ondřej ; Ježek, Michal (referee) ; Kovář, Jan (advisor)
This thesis deals with design of microprocessor controlled battery charger with support of NiCd, NiMH and Li-Ion cells. The project focus is aimed within circuits design at algorithm of charge detection implemented into microprocessor. User interface is formed by PC application which communicates with charger via USB. PC connection allows recording of charging characteristics behaviour. The result of thesis is completely designed and created battery charger including microprocessor and PC application source codes.
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Design of wind turbine regulator
Kowalczyk, Wiktor ; Vrána, Michal (referee) ; Morávek, Jan (advisor)
The bachelor thesis deals with charge control of a lead acid battery driven by 300 W wind turbine. The thesis is divided into four parts. First deals with the issue of lead battery charge controllers and the definition of a regulator for a wind turbine with permanent magnet synchronous generator, including a description of the regulated system elements. The second part deals with measurments done on the given system. Third part describes the design, algorithms and regulator programming and the last part describes construction and testing of a built-in controller.
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Accumulator tester with ESP32 module
Dresler, Jan ; Musil, Petr (referee) ; Lattenberg, Ivo (advisor)
This thesis focuses on design of printed circuit board and programming of ESP32 module. This module communicates with discharging circuit which allows testing of battery properties. With help of voltage and current sensors it is possible to test and print results of battery on display. The testing device also allows control over web user interface thanks to ESP32.
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Battery block for electric mower
Kaláb, Pavel ; Folprecht, Martin (referee) ; Vorel, Pavel (advisor)
This bachelor's thesis deals with the construction, protective circuits and lifespan of lithium ion batteries intended for electric lawn mower. The entire battery is composed of Li-ion cells with designation NCR18650A, which are connected in serial-parallel. Due to the connection of the cells in series, it is necessary to add protective circuit to each cell. Protective circuits prevent overcharging or deep discharging. Li-ion cells are extremely sensitive to overcharging and deep discharging. Absence of protective circuits can lead to irreversible damage of the entire battery pack.
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Evaluation of current DS infrastructure to potential development of charging stations in the selected area
Hýsek, David ; Krátký,, Milan (referee) ; Paar, Martin (advisor)
The bachelor's thesis deals with the evaluation of the infrastructure of charging stations and the development of fast charging stations. The first part describes the basic charging modes and parameters of selected chargers. The second part of the work presents an overview of battery electric cars and slow and fast charging. Furthermore, the work concerns the electric car policy in Europe and especially in three selected countries: The Kingdom of Norway, the Federal Republic of Germany and the Czech Republic. In the last part of the work, three scenarios of electromobility development in the selected location in Brno were compiled and subsequently the load of these scenarios on the network in the Daisy Bizon designer program was verified.
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Design of LPG-Powered Portable Generator for Resealable Cartridge
Vevera, Tomáš ; Křenek, Ladislav (referee) ; Sovják, Richard (advisor)
The topic of this bachelors thesis is the design of LPG powered generátor for resealable cartridges. The main goal is to design a lightweight portable power source. This goal has been achieved by using a rotary engine.Adding a power bank into the generátor has reached a wide use potenciál. The final design accomplishes all ergonomic and functional requirements. The final shaping tries to adress the potenciál users.
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Evaluation Of Temperature Influence on Lead-Acid Battery Properties
Langer, Martin ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This work deals with lead-acid batteries, their properties and individual types that are available on the market. The temperature dependences of the battery parameters at different ambient temperatures and at different discharging and charging modes are measured here. The theoretical part of the work deals with electrochemical cells in general, description of their main parts and principles of operation. The work analyzes the types of batteries used, their advantages and negatives. In the case of a lead-acid battery, its internal structure and the function of the electrodes and the electrolyte are taken into account. Furthermore, a description of individual possible negative phenomena that take place in lead-acid batteries and contribute to the end of their service life is included. In the practical part, 6 batteries are tested at different charging currents, which provides information about their behavior both during discharge and at the time of charging. During the experiments, testing is not only performed at room temperature, but the batteries are also exposed to high temperatures up to 75 ° C.
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Infrastructure for electromobility
Smutková, Karolína ; Böhm, Michael (referee) ; Štětina, Josef (advisor)
This thesis deals with the issue of charging electric vehicles, including a number of sub-questions. It provides an overview of current charging stations, connectors, communication between vehicle and charger during charging and of the resulting price for charging. It also takes into account the need for large amounts of energy mostly from renewable sources, coupled with battery storage facilities. The last point is a comparison of current electric vehicles mainly by battery capacity, price and range. The whole thesis is primarily related to the territory of the Czech Republic.
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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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