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Timekeeper for fire sport
Klimeš, Martin ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
The bachelor’s thesis to deals with the design of a time measuring device for a competition called fire sport. This timekeeper should be wireless and communicate in a sub-gigahertz spectrum. The first part of this work describes usable components. In the second part the thesis to deals with the design and itself realization.
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Lithium battery accumulation system testing
Straka, Jan ; Koval, Filip (referee) ; Morávek, Jan (advisor)
This bachelor thesis deals with properties, parameters and testing of lithium battery systems available on the market. It describes basic parameters of battery cells, which are used to make batteries and battery systems, equivalent electrical models of batteries for the purpose of conversion of their properties to an electrical circuit and stating and comparing commercial battery systems of different manufacturers. What follows is the introduction of tests to measure the parameters of battery systems. The experimental part of this thesis describes the used testing platform and evaluates results of carried out measurements.
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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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Design of tester for electric hand tools batteries
Václavík, Tomáš ; Bednařík, Josef (referee) ; Krejsa, Jiří (advisor)
This thesis describes design and realization of simple testing device used to estimate State of Health of Li-ion accumulator pack. Basic parameters of Li-ion accumulators and methods used to examine their state are explored. Specific type of accumulator and its charger are analyzed. Complete device design, device realization, measurement records and their analysis are carried out. Algorithm for quick estimate of State of Health is created.
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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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Lithium battery accumulation system testing
Straka, Jan ; Koval, Filip (referee) ; Morávek, Jan (advisor)
This bachelor thesis deals with properties, parameters and testing of lithium battery systems available on the market. It describes basic parameters of battery cells, which are used to make batteries and battery systems, equivalent electrical models of batteries for the purpose of conversion of their properties to an electrical circuit and stating and comparing commercial battery systems of different manufacturers. What follows is the introduction of tests to measure the parameters of battery systems. The experimental part of this thesis describes the used testing platform and evaluates results of carried out measurements.
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Study Of Life Cycle Of The Accumulators
Babieska, Lukáš
This article presents the issue of changing the parameters of a Li-Ion accumulator during its life cycle. The introduction briefly describes the theory of accumulator charging and discharging and the effect of temperature on these processes. The next part introduces practical measurements and changes of parameters of two different accumulators.
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