|
|
Oxygen cycle during pulse charging of lead-acid accumulator
Havlíček, Jiří ; Vaněk, Jiří (referee) ; Křivík, Petr (advisor)
This master´s thesis applies to puls charging of lead-acid accumulator and arising oxygen cycle while charging. First part of the thesis is focused on potential dividing of lead-acid accumulators and their construction. I also focus on priciples of submerged electrodes accumulator, gel accumulator and AGM accumulator based on oxygen cycle. The next topic are thermal and degradation processes inside accumulators and their influence on capacity and lifespan. In theoretical part am I describing ways of charging and I also point out possitives and negatives. Practical part focuses on producing experimental cell and its form. Experimental cell is tested to different modes. I evaluate their influence on temperature inside the cell, intensity of oxygen cycle and capacity. I compare their influence on duration of charging cycle to another possible charging modes.
|
|
|
Analysis of thermal processes inside of lead acid battery cell in oxygen cycle regime
Vondrák, Michal ; Bača, Petr (referee) ; Křivík, Petr (advisor)
The aim of this thesis is the analysis of thermal processes in lead accumulators with oxygen cycle. The work is explaining the structure and principle of operation of the standard lead-acid battery and lead-acid battery with oxygen cycle. Generally are described thermal action inside a lead battery with oxygen cycle and the different types of heat generated during operation of the battery are discussed in detail. One chapter describes the practical experiments and their results.
|
|
|
Evaluation Of Temperature Influence on Lead-Acid Battery Properties
Malyi, Denys ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This master's thesis acquaints with the current state of research into phenomenon the Thermal runaway effect in lead-acid batteries. The literature search presents individual theories that try to explain the TRE phenomenon. The second chapter presents proposed experiments that will monitor temperature changes in lead-acid batteries of various designs. In the practical part of the master's thesis, the performed experiments, their courses, and their evaluation are described.
|
|
|
The cycle modes of lead-acid batteries
Mičák, Tomáš ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
Main goal of the diploma thesis is to examine lead-acid accumulator and to study cycling modes in different setups. Theoretical part describes history, types of maintenance-free batteries, degradation mechanisms and possibilities to remove them. Practical part involves the production of electrodes and experimental cell, composition of active mass and measurement of internal resistance. Different configurations for deep cycling are researched as well. The results of the work are summarized and commented at the conclusion of the thesis.
|
|
|
Temperature changes in different designs of lead-acid batteries
Langer, Martin ; Libich, Jiří (referee) ; Bača, Petr (advisor)
This diploma thesis deals with lead accumulators, the possibilities of their division and the basic reactions that take place inside taking into account the design features of individual types. Both exothermic and endothermic reactions taking place at the electrode-electrolyte interface, as well as the heating of the accumulator caused by Joule losses on its internal resistance, are then discussed in more detail. However, the charging reaction is also accompanied by other internal processes of the accumulator, which are related to electrolysis, recombination of water and polarization resistance. A calorimeter made of expanded polystyrene and a measuring center with external temperature sensors are used to quantify the degree of causation of temperature changes of individual processes. In the thesis, the rate of heat loss through the walls of the calorimeter is subsequently evaluated and used to calculate the total thermal energy during cycling.
|
|
|
Evaluation Of Temperature Influence on Lead-Acid Battery Properties
Malyi, Denys ; Zimáková, Jana (referee) ; Bača, Petr (advisor)
This master's thesis acquaints with the current state of research into phenomenon the Thermal runaway effect in lead-acid batteries. The literature search presents individual theories that try to explain the TRE phenomenon. The second chapter presents proposed experiments that will monitor temperature changes in lead-acid batteries of various designs. In the practical part of the master's thesis, the performed experiments, their courses, and their evaluation are described.
|
|
|
Oxygen cycle during pulse charging of lead-acid accumulator
Havlíček, Jiří ; Vaněk, Jiří (referee) ; Křivík, Petr (advisor)
This master´s thesis applies to puls charging of lead-acid accumulator and arising oxygen cycle while charging. First part of the thesis is focused on potential dividing of lead-acid accumulators and their construction. I also focus on priciples of submerged electrodes accumulator, gel accumulator and AGM accumulator based on oxygen cycle. The next topic are thermal and degradation processes inside accumulators and their influence on capacity and lifespan. In theoretical part am I describing ways of charging and I also point out possitives and negatives. Practical part focuses on producing experimental cell and its form. Experimental cell is tested to different modes. I evaluate their influence on temperature inside the cell, intensity of oxygen cycle and capacity. I compare their influence on duration of charging cycle to another possible charging modes.
|
|
|
The cycle modes of lead-acid batteries
Mičák, Tomáš ; Tošer, Pavel (referee) ; Vaculík, Sebastian (advisor)
Main goal of the diploma thesis is to examine lead-acid accumulator and to study cycling modes in different setups. Theoretical part describes history, types of maintenance-free batteries, degradation mechanisms and possibilities to remove them. Practical part involves the production of electrodes and experimental cell, composition of active mass and measurement of internal resistance. Different configurations for deep cycling are researched as well. The results of the work are summarized and commented at the conclusion of the thesis.
|
|
|
Analysis of thermal processes inside of lead acid battery cell in oxygen cycle regime
Vondrák, Michal ; Bača, Petr (referee) ; Křivík, Petr (advisor)
The aim of this thesis is the analysis of thermal processes in lead accumulators with oxygen cycle. The work is explaining the structure and principle of operation of the standard lead-acid battery and lead-acid battery with oxygen cycle. Generally are described thermal action inside a lead battery with oxygen cycle and the different types of heat generated during operation of the battery are discussed in detail. One chapter describes the practical experiments and their results.
|
guest ::
