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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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Monitoring of Electrode Changes of Negative Electrode for Lead-Acid Batteries by Operando Confocal Microscopy
Hálová, Hana ; Vanýsek, Petr (referee) ; Chladil, Ladislav (advisor)
The thesis is focused on the laser microscopy observation of the negative electrode for lead-acid batteries during their cycling. The surface changes are evaluated during both deep cycling and PSoC (Partial State of Charge) cycling. The mode leads to gradual degradation of the negative electrode – mostly because of irreversible sulfation. The speed of the sulfation can be influnced by additives of the negative active mass added already during production process. The active mass was firstly examined by electron microscope and X-ray diffractometer. The crystal growth during cycling was observed using confocal microscope Olympus Lext OLS4100.
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Design Thermally Insulated Chamber and Constant Temperature Regulation of Chamber
Vejnar, Pavel ; Dohnal, Petr (referee) ; Šedivá, Soňa (advisor)
The purpose of thesis is proposes a small temperature chamber with temperature control. The first part is focused on description Peltier cells, the theory of heat transfer and cooling. Next part of thesis is select suitable thermo-box and computes temperature resistance and includes simulation and real measuring. In next step is chamber simulate in program ANSYS and compare with real measuring. At the end is construct electronic control of temperature in thermo-box for constant value with programming program for the PC. The conclusion summarizes the results of the work.
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Study Of Surface Changes Of Negative Electrode For Lead-Acid Batteries Using Operando Confocal Laser Microscopy
Hálová, Hana
Our contribution deals with the laser microscopy observation of the negative electrodefor lead-acid batteries during their life-span. We evaluate the surface changes during both deepcycling and PSoC (Partial State of Charge) cycling. The mode leads to a gradual degradation of thenegative electrode – mostly because of irreversible sulfation. The speed of the sulfation can be influencedby additives added already during the production process. The active mass was firstlyexamined by electron microscope and X-ray diffractometer. After that, the crystal growth duringcycling was observed using confocal microscope Olympus Lext OLS4100.
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Monitoring of Electrode Changes of Negative Electrode for Lead-Acid Batteries by Operando Confocal Microscopy
Hálová, Hana ; Vanýsek, Petr (referee) ; Chladil, Ladislav (advisor)
The thesis is focused on the laser microscopy observation of the negative electrode for lead-acid batteries during their cycling. The surface changes are evaluated during both deep cycling and PSoC (Partial State of Charge) cycling. The mode leads to gradual degradation of the negative electrode – mostly because of irreversible sulfation. The speed of the sulfation can be influnced by additives of the negative active mass added already during production process. The active mass was firstly examined by electron microscope and X-ray diffractometer. The crystal growth during cycling was observed using confocal microscope Olympus Lext OLS4100.
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Design Thermally Insulated Chamber and Constant Temperature Regulation of Chamber
Vejnar, Pavel ; Dohnal, Petr (referee) ; Šedivá, Soňa (advisor)
The purpose of thesis is proposes a small temperature chamber with temperature control. The first part is focused on description Peltier cells, the theory of heat transfer and cooling. Next part of thesis is select suitable thermo-box and computes temperature resistance and includes simulation and real measuring. In next step is chamber simulate in program ANSYS and compare with real measuring. At the end is construct electronic control of temperature in thermo-box for constant value with programming program for the PC. The conclusion summarizes the results of the work.
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