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Optimalization and methods of internal resistance measurement of the lead acid battery cell
Fojtlín, Branislav ; Vaculík, Sebastian (oponent) ; Křivík, Petr (vedoucí práce)
The aim of this master´s thesis is optimalization and methods of measuring the internal resistance of lead acid accumulator. First focus is on the analysis of properties of lead acid accumulators, their construction and negative effects. After that a method of measuring the internal resistance of experimental accumulator is processed. In this thesis practical design of measuring workplace is completed. The frequency analysis of impedance of charging and discharging accumulator is performed. After that the graph of internal resistance for various amplitude intensities, for various signal forms and also for various size of frequencies of alternating current are processed. The result of this thesis is a comparison of graphic works addictions charging and discharging characteristics of lead acid accumulator and determination of optimal amplitude, form and intensity of frequency of alternating current in point when internal resistance is evaluated correctly.
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Lowcost autonomous electrical energy source
Fojtlín, Branislav ; Drexler, Petr (oponent) ; Jirků, Tomáš (vedoucí práce)
The aim of my bachelor’s work is a low-cost autonomous generator of electrical energy. Since the offer on the market for photovoltaic systems is now very wide, it is my task to select a cheap and effective solution for solar energy generator that will provide three different levels of voltage on the output. I focus especially on the overview of the types of photovoltaic cells and comparison of cells producers. This work also describes switching converters, which will be used for the output voltage conversion for the target system. In the work the solution by different DC/DC regulators is described.
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Lowcost autonomous electrical energy source
Fojtlín, Branislav ; Drexler, Petr (oponent) ; Jirků, Tomáš (vedoucí práce)
The aim of my bachelor’s work is a low-cost autonomous generator of electrical energy. Since the offer on the market for photovoltaic systems is now very wide, it is my task to select a cheap and effective solution for solar energy generator that will provide three different levels of voltage on the output. I focus especially on the overview of the types of photovoltaic cells and comparison of cells producers. This work also describes switching converters, which will be used for the output voltage conversion for the target system. In the work the solution by different DC/DC regulators is described.
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Optimalization and methods of internal resistance measurement of the lead acid battery cell
Fojtlín, Branislav ; Vaculík, Sebastian (oponent) ; Křivík, Petr (vedoucí práce)
The aim of this master´s thesis is optimalization and methods of measuring the internal resistance of lead acid accumulator. First focus is on the analysis of properties of lead acid accumulators, their construction and negative effects. After that a method of measuring the internal resistance of experimental accumulator is processed. In this thesis practical design of measuring workplace is completed. The frequency analysis of impedance of charging and discharging accumulator is performed. After that the graph of internal resistance for various amplitude intensities, for various signal forms and also for various size of frequencies of alternating current are processed. The result of this thesis is a comparison of graphic works addictions charging and discharging characteristics of lead acid accumulator and determination of optimal amplitude, form and intensity of frequency of alternating current in point when internal resistance is evaluated correctly.
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