Temperature changes in different designs of lead-acid batteries

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