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Numerical modelling of Li-S batteries
Mezera, Petr ; Jaššo, Kamil (referee) ; Mačák, Martin (advisor)
This work deals with modeling and simulation of Li-S batteries in Matlab. The work describes the properties of these batteries, their construction and the problems associated with their development. Furthermore, experimental techniques and their importance for numerical modeling of batteries are discussed. Different types of battery modeling are described in the work, then numerical models for simulations are analyzed in more detail. The procedure for making the Li-S battery is described and the measurements made on it are described. The measured data has been adapted for use in several different ECMs. Finally, models of a replacement circuit for the Li-S battery were built. One model accounted for the polynomial equations and the other the resulting circuit. The latter used linear interpolation and was more accurate.
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Impedance spectroscopy measurements in lead acid batteries
Holemář, Jan ; Bača, Petr (referee) ; Křivík, Petr (advisor)
The master thesis provides a brief introduction to the lead-acid batteries. The thesis describes an internal construction, electrochemical reactions inside the batery, the area of application and possible degradation effects. The next part deals with an analytic method of the measurement called electrochemical impedance spectroscopy. The thesis describes the principle of measurement, alternative equivalent circuits, the impedance of electrochemical cell and the analyse of recorded datas. In the practical part was assembled the functional lead-acid cell. After that, experimental measurement was passed on the lead-acid cell in discharge and in a different concentration of electrolyte. In the last part was created the simulation of treatment of an electrochemical cell in the development solution Agilent VEE and after that all the measurement results were compared with the simulation.
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Numerical modelling of Li-S batteries
Mezera, Petr ; Jaššo, Kamil (referee) ; Mačák, Martin (advisor)
This work deals with modeling and simulation of Li-S batteries in Matlab. The work describes the properties of these batteries, their construction and the problems associated with their development. Furthermore, experimental techniques and their importance for numerical modeling of batteries are discussed. Different types of battery modeling are described in the work, then numerical models for simulations are analyzed in more detail. The procedure for making the Li-S battery is described and the measurements made on it are described. The measured data has been adapted for use in several different ECMs. Finally, models of a replacement circuit for the Li-S battery were built. One model accounted for the polynomial equations and the other the resulting circuit. The latter used linear interpolation and was more accurate.
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Impedance spectroscopy measurements in lead acid batteries
Holemář, Jan ; Bača, Petr (referee) ; Křivík, Petr (advisor)
The master thesis provides a brief introduction to the lead-acid batteries. The thesis describes an internal construction, electrochemical reactions inside the batery, the area of application and possible degradation effects. The next part deals with an analytic method of the measurement called electrochemical impedance spectroscopy. The thesis describes the principle of measurement, alternative equivalent circuits, the impedance of electrochemical cell and the analyse of recorded datas. In the practical part was assembled the functional lead-acid cell. After that, experimental measurement was passed on the lead-acid cell in discharge and in a different concentration of electrolyte. In the last part was created the simulation of treatment of an electrochemical cell in the development solution Agilent VEE and after that all the measurement results were compared with the simulation.
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