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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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Modified glass fibers as additives of the negative electrode of a lead-acid battery
Zbožínek, Tadeáš ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This bachelor thesis is focused on the working of lead-acid batteries in hybrid electronic vehicles. The goal is to increase the negative electrode characteristics of VRLA batteries. The negative electrode suffers significant degradation in the partial-state-of-charge mode, which is used for these vehicles. When the VRLA battery is being used in the partial-state-of-charge mode, premature loss of capacity occurs due to sulfation of the negative active mass. For these reasons we are trying to improve active mass with additives, which Is expected to interrupt the unwanted processes, that leading to capacity loss. We are focusing on a specific additive in form of glass fibers, which exhibits similar positive effect on the lifetime of the battery as a carbon additive. The surface of glass fibers will be modified. Afterwards, the influence of the modified glass fibers on the lifetime of the battery will be observed.
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Modified glass fibers as additives of the negative electrode of a lead-acid battery
Zbožínek, Tadeáš ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This bachelor thesis is focused on the working of lead-acid batteries in hybrid electronic vehicles. The goal is to increase the negative electrode characteristics of VRLA batteries. The negative electrode suffers significant degradation in the partial-state-of-charge mode, which is used for these vehicles. When the VRLA battery is being used in the partial-state-of-charge mode, premature loss of capacity occurs due to sulfation of the negative active mass. For these reasons we are trying to improve active mass with additives, which Is expected to interrupt the unwanted processes, that leading to capacity loss. We are focusing on a specific additive in form of glass fibers, which exhibits similar positive effect on the lifetime of the battery as a carbon additive. The surface of glass fibers will be modified. Afterwards, the influence of the modified glass fibers on the lifetime of the battery will be observed.
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Portable digitally controlled stabilized source of symmetrical voltage
Hynek, David ; Drexler, Petr (referee) ; Mikulka, Jan (advisor)
This thesis deals with a design of a power supply for a measuring equipment for a geophysical mapping intended to do a reconstruction of an electrical impedance of a ground environment of water reservoirs. The power source is going to be used for laboratory measurements and for outdoor experiments. The thesis describes the selection of suitable components, equipment design and testing. The theoretical part explains the functions of used components and the principle of an electrical impedance tomography. The conclusion summarizes the properties of the proposed solution and evaluates the final product.
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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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The effect of pressure on the electrode system in lead acid batteries with experimental electrodes
Gerják, Rastislav ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
Lead acid battery is nowadays one of the most used secondary source of energy, especially in automotive industry. One of the most important parameters is battery life, which is result of quality of its design, proper handling and minimizing of degradation mechanisms. This bachelor’s thesis deals with premature capacity loss of lead acid batteries of hybrid electric vehicles in a partial state of charge. Assumed solution is adding additives to negative active mass and suitable adjustment of pressure on the electrode system.
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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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Study of active mass volume changes of lead acid battery electrodes
Nevoral, Miroslav ; Vaněk, Jiří (referee) ; Křivík, Petr (advisor)
This bachelor´s thesis deals with detailed study of influence of thurst on attributes of positive and negative electrode masses of lead acid battery electrodes with main accent on explanation of measured characteristics. Three kinds of electrode systems were put together and measured. Measured characteristics of changes of thurst power were recalculated during charging and discharging to changes of total thickness of system.
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Influence of conductive ceramics on the life of lead acid batteries
Tobolák, Jakub ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
This thesis is focused on lead-acid batteries used in hybrid electric vehicles. These cells work in specific conditions, particularly under partial charge referred to as PSOC. This fact is responsible for the premature loss of capacity cell lead-acid batteries and their short lifetime. The task of this thesis is to examine the effect of conductive ceramics as possible additives to the negative electrode active materials of lead-acid battery cells operating in a PSOC, in order to prolong their life.
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