|
|
Estimating the Equivalent Circuit of Lithium-Ion Batteries During Operation
Vašíček, Jakub ; Vyroubal, Petr
This paper deals with the issue of estimating the equivalent circuit of lithium-ion cells during normal operation. The study explores fundamental battery models, such as the simplified Randles circuit and the full Randles circuit. Conventional methods for model estimation, including Electrochemical Impedance Spectroscopy (EIS) and Galvanostatic Intermittent Titration Technique (GITT) are examined. The research extends into the real-world data analysis, gained from a home photovoltaic system. Using these data, an algorithm to estimate the equivalent circuit model during battery operation is evaluated. The study investigates the correlation between the proposed algorithm's outcomes and results obtained through EIS and GITT methods.
|
|
|
Lithium-ion battery SOH analysis
Sedlařík, Marek ; Kazda, Tomáš ; Vyroubal, Petr
Battery State-of-Health modelling can significantly reduce the amount of costly laboratory tests in the application being analyzed. This paper discusses the prediction of the State-of-Health, an indicator of battery life, using support vector regression. This experiment is performed on a sample cell of a lithium-ion battery, which is subjected to a method known as the Constant Current Constant Voltage method, where the battery is charged and discharged at a constant current of 0.5 C. Although this method in this paper is applied in laboratory conditions and it is a controlled method, or it deviates from the battery cycling of real applications, it can be used in these applications, thus the scope of this research can predict the State-of-Health also in the areas of batteries used in mobile devices or electromobility. The State-of-Health indicator then determines whether the battery is still suitable for that primary application. Assuming that we can predict this parameter with some accuracy, it is then also possible to tell after what length of time a battery will need to be replaced and when it will be suitable for secondary applications such as stationary storage. Once it reaches that state, this calculation can be further applied to those applications as well.
|
|
|
MS-NAP Support for AVG System
Kuchta, Ondřej ; Trchalík, Roman (referee) ; Očenášek, Pavel (advisor)
This bachelor thesis deals with design and implementation of Microsoft NAP technology for AVG antivirus from the AVG Technologies Company. First part describes general architecture and deployment options of NAP technology. The next part describes design and implementation of client-side and server-side NAP support for AVG antivirus. The result is a comprehensive document about design and implementation of NAP for third-parties software solutions.
|
|
|
Battery storage with second life cycle batteries
Král, Dominik ; Pazdera, Ivo (referee) ; Procházka, Petr (advisor)
The bachelor thesis deals with problems related to the solution of energy storage. It deals with the analysis of used types of accumulators, deals with their advantages, disadvantages, on what principle they work. It focuses on the possibilities and problems of using batteries in the "Second life" mode. It presents the subsequent process of preparing batteries for further application and defines the tests necessary to evaluate the condition of batteries before further use. Finally, the actual energy storage designs and the block topology of the energy storage are presented.
|
|
|
MS-NAP Support for AVG System
Kuchta, Ondřej ; Trchalík, Roman (referee) ; Očenášek, Pavel (advisor)
This bachelor thesis deals with design and implementation of Microsoft NAP technology for AVG antivirus from the AVG Technologies Company. First part describes general architecture and deployment options of NAP technology. The next part describes design and implementation of client-side and server-side NAP support for AVG antivirus. The result is a comprehensive document about design and implementation of NAP for third-parties software solutions.
|
guest ::
