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Lead-acid battery formation
Hlaváč, Pavel ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
This bachelor project deals with the pulse charging of lead-acid batteries and ways of formation of electrodes so that the new batteries can constantly offer high performance and efficiency for its life. The work is an attempt to compare and determine whether the formation of different charging modes will not have a major impact on the quality of a formed battery. The formation of the different modes uses both the pulse and continuous charging. Everything is tested on four manufactured articles. The production of positive electrode and formation of accumulator is processed in various chapters of my project at our workplace.
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Lead-acid battery formation
Hlaváč, Pavel ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
This bachelor project deals with the pulse charging of lead-acid batteries and ways of formation of electrodes so that the new batteries can constantly offer high performance and efficiency for its life. The work is an attempt to compare and determine whether the formation of different charging modes will not have a major impact on the quality of a formed battery. The formation of the different modes uses both the pulse and continuous charging. Everything is tested on four manufactured articles. The production of positive electrode and formation of accumulator is processed in various chapters of my project at our workplace.
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Investigation pressure effect on lead-acid accumulator lifetime for hybrid electric vehicles.
Kulhány, Andrej ; Bilko, Radek (referee) ; Bača, Petr (advisor)
The thesis is focused on remitting lead-acid segments of partial charge mode which simulates the conditions in HEV. The experimental cells were submitted to different pressures on the electrode system. The main aim of the thesis was to minimize the irreversible sulphating of the negative electrodes, which are in the PSoC regime limiting in the overall life of lead-acid accumulators. All cells were submitted to measurement of the negative electrode potentials, resistance of active materials, contact resistance of the grid – the active material and measurements of pressure changes during three PSoC cycles.
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Lead-acid battery formation
Hlaváč, Pavel ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
This bachelor project deals with the pulse charging of lead-acid batteries and ways of formation of electrodes so that the new batteries can constantly offer high performance and efficiency for its life. The work is an attempt to compare and determine whether the formation of different charging modes will not have a major impact on the quality of a formed battery. The formation of the different modes uses both the pulse and continuous charging. Everything is tested on four manufactured articles. The production of positive electrode and formation of accumulator is processed in various chapters of my project at our workplace.
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Sulphated metabolites of silybin and their interactions with sulphatases
Ježková, Zuzana ; Weignerová, Lenka (advisor) ; Kavan, Daniel (referee)
This bachelor thesis solves the question of sulphated metabolites of silybin by their interactions with sulfatases. Silybin is flavonolignan prepared from the seeds of milk thistle (Silybum marianum). Sulfate of silybin (metabolite) has not been isolated from organism so far thus its exact structure has not been determined. In this work synthesis of silybin-7,23-disulfate from natural silybin is presented. Silybin disulfate was isolated and spectrally characterized (NMR, MS). In the next step the kinetics of the reaction pNPS with sulfatase from Helix pomatia was measured: Km = 0.0494 mmol/l a Vmax = 0.0325 mmol/dm3 /min. Conditions for sulfatase reaction from Helix pomatia were selected according to literature. One of the main goal was to determine, whether silybin-7,23-disulfate is a substrate and/or an inhibitor of sulfatase from Helix pomatia. Activity measurements of the sulfatase from Helix pomatia in the presence of various concentrations of silybin-7,23-disulfate enabled us to determine that silybin disulfate at concentration higher than 0.2 mM is a strong inhibitor of the sulfatase tested. Series of reactions with sulfatase from Helix pomatia were performed to determine whether silybin-7,23-disulfate is a substrate. Reactions were monitored by HPLC and it was demonstrated that the...
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Lead-acid battery formation
Hlaváč, Pavel ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
This bachelor project deals with the pulse charging of lead-acid batteries and ways of formation of electrodes so that the new batteries can constantly offer high performance and efficiency for its life. The work is an attempt to compare and determine whether the formation of different charging modes will not have a major impact on the quality of a formed battery. The formation of the different modes uses both the pulse and continuous charging. Everything is tested on four manufactured articles. The production of positive electrode and formation of accumulator is processed in various chapters of my project at our workplace.
|
|
| |
|
|
Investigation pressure effect on lead-acid accumulator lifetime for hybrid electric vehicles.
Kulhány, Andrej ; Bilko, Radek (referee) ; Bača, Petr (advisor)
The thesis is focused on remitting lead-acid segments of partial charge mode which simulates the conditions in HEV. The experimental cells were submitted to different pressures on the electrode system. The main aim of the thesis was to minimize the irreversible sulphating of the negative electrodes, which are in the PSoC regime limiting in the overall life of lead-acid accumulators. All cells were submitted to measurement of the negative electrode potentials, resistance of active materials, contact resistance of the grid – the active material and measurements of pressure changes during three PSoC cycles.
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