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Battery charger
Paták, Michal ; Kopečný, Lukáš (referee) ; Burian, František (advisor)
This diploma thesis deals with battery charging. The thesis describes qualities and possi-bilities of lithium battery charging. The charger is independent on the input voltage and recharges batteries carefully. Due to a careful recharging process it is needed to measure the voltage at various cells of the battery and then balance this voltage. Since the charger is to be implemented in a robot, it is needed to switch the operation from an external source and the battery. The first part of the project deals with qualities of batteries and the way of their recharging. In the second part I design an individual blocks charger. In the third part I deal with a communication with a computer charger and data visualization. And in the last part I designed a program for the charger.
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Lead Acid Battery Charger
Jeleček, Ondřej ; Tonar, Karel (referee) ; Tošer, Pavel (advisor)
This diploma thesis is focused on design of lead acid baterry charger. First chapters describes the charging and discharging principes. This paper also shows basics types of lead acid batteries, their distribution depends on maintenance and part connected to the processes connected to the charging and discharging of the acumulators. Following part is focused on theoretical design of the charger with set up of parameters. Diploma thesis also contains comparsion of requested and real parameters of the charger.
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Verification series of fast-chargers for lead-acid accumulators 12V and 6V
Benada, Tomáš ; Huták, Petr (referee) ; Vorel, Pavel (advisor)
This thesis is an engineering design of an intelligent fast-charger for lead-acid accumulators. It contains calculations of each component. The switching power supply is the mainstay of the charger that makes the charger portable, lightweight and small. The Intelligent fast-charger for lead-acid accumulators charges the accumulator by method of constant voltage with current limitation of 0,5A, 5A, 10A, 50A. 50A current is used in winter during starting of a car, when the battery can´t provide sufficient current. There are three LEDs placed on the front side of the charger reflecting status of the device. The device comprises safety protection for the charger, supply network and battery.
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Accumulator Charger with Microcontroller
Losenický, Roman ; Punčochář, Josef (referee) ; Šebesta, Jiří (advisor)
My master thesis is focused on intorducing, analysing and describing the microprocessor controlled charger. The thesis is firstly describing and analysing the topic of accumulator cell charging for common technologies. Than there is detailed description of specific accumulator cell types (NiMH, NiCd and Li-ion) which is the microprocessor controled charger intend for. The next part of this thesis is showing the proposal of the charger. There is the block diagram, charger detailed schematics based on this block diagram. There is also list of the possible useful componets neccessary for charger assembling. All this is used for the final proposal of the chager itself. The main scope of this thesis is than the charger's microcontroler firmware decribed at the end of this thesis. Finaly confirmation of the charger proper proposal and assembly is the battery charging with the given basic parameters.
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Functional blocks for the development of autonomous photovoltaic system
Ovesný, Karel ; Křivík, Petr (referee) ; Bača, Petr (advisor)
The project considers realization system, which will allow us to test six different operation modes on lifetime accumulators. The system will link to computer, which will execute measurement current and tension and switch betwencharging and discharging modes. The measured values will record in someone time intervals in to computer memory. After someone time will analise these measured valuer and will provide optional operation mode.
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The inverter based battery charger
Kadlec, Josef ; Pazdera, Ivo (referee) ; Červinka, Dalibor (advisor)
The aim of this master’s thesis is provide detailed information about car battery’s charger with a switching power supply. The kind of this power supply is one-pulsed conducting inverter with transformer. The charger’s rates of nominal voltage are 6 and 12 V. The method of charging is charging by constantly voltage with a current limitation. The values of a current limitations are 0.5A, 5A and 20A. The charger’s maximal current is 50A. This current can help to the accumulator with starting of a vehicle. This device is equipped by indicators which indicate the end of charging.
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Testing and charging of accumulator cells
Sršeň, Jan ; Kubánek, David (referee) ; Lattenberg, Ivo (advisor)
Direction of the master's thesis is design and construct electronic device for testing available accumulators. Than there are in detail subscribe some metods of charging cells and their right usage to select type of cells. Also eventually problems that can become if the choice is false. Next part contains description of principles as several type accumulator works and their loading characteristic witch are important know for choose the best testing way. The most important knowledge is detection of stop point charging when accumulators are charged and following charging can be dangerous. Because there are more methods to detect this point so in thesis are overwrite. The most important part is design of tester. That is mapped to more segments witch communicating together. Controller part of intelligent tester contains ATmega128 microcontroller so there is present a passage of program code. Last section of master's thesis describe a physical consruction and explain division for smaller parts and hole process of tester function.
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Development control programme for autonomous fotovoltaic system
Janáč, Stanislav ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
The project considers realization system, which allows us to test six different operation modes on lifetime of accumulators. The system will be connected to computer, that will perform measurement of current and voltage and switch betwen charge and discharge modes. The measured values will be recorded in certain time intervals to computer memory. After some time these measured data will be analised and the most optimal operational mode will be set.
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Up-to-date Methods of Charging Processes
Górnisiewicz, Tomáš ; Janoušek, Michal (referee) ; Dundálek, Radim (advisor)
This thesis deals with up-to-date methods of charging processes used in combustion engines of contemporary cars. Major emphasis is put on turbocharged petrol engines. Principles of charging process are explained as well as the most common and extraordinary ways of charging process. Following chapter contains summary of present-day turbocharged and supercharged engines. Final part describes turbocharger failures. Turbo-charging represents an elementary way to increase engine power and allows designing high efficient engines of small dimensions.
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