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Examination of temperature changes in lead-acid battery system
Starý, Viktor ; Křivík, Petr (referee) ; Bača, Petr (advisor)
In the automobile industry is always more often talking about hybrid electric vehicles at the present. Functioning of these hybrid automobiles is provided by source of energy. This source is represented by accumulator. When accumulator is working we can see temperature changes. This project is dealing with used types of accumulators for hybrid electric vehicles. In the second phase is dealing with enquiring of temperature changes during different modes of operating.
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The concept of electric motors used in vehicles
Polnický, Vít ; Repka, Martin (referee) ; Böhm, Michael (advisor)
This bachelor’s thesis deals with the description of electric drives concepts in current vehicles. In the first part, the basic principle of the electric motor is explained, and different types of electric motors are described in detail. In the next part of the thesis, the electrified vehicles are divided into three groups according to the power share of electric motor for vehicle propulsion. The groups are further subdivided according to the powertrain arrangement in the vehicle, indicating the advantages and disadvantages of each concept. In the third part, specific vehicles from each group are presented and compared in terms of performance, range and price. Finally, the concepts are evaluated and a possible development is outlined.
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Effect of additives in lead-acid batteries for hybrid electric vehicles
Tobolák, Jakub ; Křivík, Petr (referee) ; Bača, Petr (advisor)
This thesis is focused on lead-acid batteries used in hybrid electric vehicles. These batteries operate under partial charge, which brings problems with premature capacity loss. Tasks is to examine the influence of glass fibers as possible additives to the negative electrode of these cells in order to extend their life. The text describes the problem of hybrid electric vehicles, lead-acid batteries and other electrochemical sources.
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Examination of temperature changes in lead-acid battery system
Starý, Viktor ; Křivík, Petr (referee) ; Bača, Petr (advisor)
In the automobile industry is always more often talking about hybrid electric vehicles at the present. Functioning of these hybrid automobiles is provided by source of energy. This source is represented by accumulator. When accumulator is working we can see temperature changes. This project is dealing with used types of accumulators for hybrid electric vehicles. In the second phase is dealing with enquiring of temperature changes during different modes of operating.
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Using lead-acid accumulators in hybrid electric vehicle regime
Klojda, Viktor ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
This bachelor´s thesis is focused on utilization of maintenance-free lead-acid accumulators in hybrid electric vehicle regime. It describes paralel and serial draft of hybrid vehicles, their function, advantages and disadvantages. It compares lead-acid accumulators with other sorts of primary, secondary and fuel cells. Purpose of this thesis is to improve the lifetime of lead-acid batteries in PSOC regime and accompanying addition use, as an activ material of negative electrode.
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Influence of conductive ceramics on the life of lead acid batteries
Tobolák, Jakub ; Vaněk, Jiří (referee) ; Bača, Petr (advisor)
This thesis is focused on lead-acid batteries used in hybrid electric vehicles. These cells work in specific conditions, particularly under partial charge referred to as PSOC. This fact is responsible for the premature loss of capacity cell lead-acid batteries and their short lifetime. The task of this thesis is to examine the effect of conductive ceramics as possible additives to the negative electrode active materials of lead-acid battery cells operating in a PSOC, in order to prolong their life.
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Design of Generalized Powertrain Model
Borkovec, Tomáš ; Kenyeres, Martin (referee) ; Škorpil, Vladislav (advisor)
In this work is proposed the generalized powertrain of the parallel hybrid car. The powertrain is composed from the sub-models of the power sources. Each sub-model is described by the quasi-static modeling. For given routes is computed the power demand. Based on the derived power demand, three energy management systems are tested. First system is based on heuristic rules. The second one use more sophisticated control algorithms - the optimization method. Main idea is based on minimum principle, when the control algorithm tries to minimize the cost function (fuel use, emission). The last one is based on the equivalent consumption minimization strategy.
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