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Exploring the influence of pressure on the life of lead acid batteries for hybrid electric vehicles
Pospíchal, Martin ; Tošer, Pavel (referee) ; Bača, Petr (advisor)
The lead-acid batteries used in hybrid electronic vehicles HEV operate in high-rate mode in a state of partial charge PSoC. It occurs when the degradation mechanisms related to irreversible sulphation and negative electrodes are a limiting factor in the life of lead-acid batteries. The electrode system was applied to experimental pressure cells of different sizes. Exp. cells were subjected to measurement and evaluation of potential negative electrode, a negative active mass resistance, contact resistance of transition collector - the active mass with the evaluation and measurement of pressure fluctuations within four PSoC runs.
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Conductive ceramic as additive in the lead-acid accumulators
Šrut, Martin ; Křivík, Petr (referee) ; Bača, Petr (advisor)
Lead-acid batteries are most used secondary electrochemical power sources. Their basic principle has remained the same for several years; only the operating parameters are in development. Lead-acid batteries are used in hybrid electric vehicles (HEV), which operates in the partial charge PSoC. Sulphation is one of the possible failures lead-acid batteries in the HEV, especially the negative electrode. By adding additives to the negative active mass can reduce the rate of sulphation and increase ability to accept an electrical charge by negative electrode.
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The effect of pressure on the electrode system in lead acid batteries with experimental glass fibers aditives electrodes
Fryda, Daniel ; Vaculík, Sebastian (referee) ; Bača, Petr (advisor)
This Master’s thesis deals with the lead-acid batteries, which are alternativ power supply. The lead-acid batteries are the oldest type of battery cells. This lead-acid batteries have a great use in hybrid electric vehicles (HEVs), which operate in different modes of vehicle operation. These modes correspond to the reactions taking place during discharging and charging the battery. The lead-acid batteries in hybrid electric vehicles work in mode PSoC. The practical part of the Master`s thesis examines how the characteristics of lead-acid batteries are modified due to admixture of glass fibers into negative active material and application of pressure to the electrode system.
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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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Hybrid vehicle propulsion
Sommer, Matěj ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This thesis sums up a comprehensive overview of all possible ways of hybrid propulsion and points out the andvatages and disadvantages of each of these designs with special attention to fuel cell vehicles. It includes a presentation of my own opinions regarding this issue and an estimation of future development of hybrid propulsion technologies and their place on the market with personal vehicles.
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