• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 48
  • Tagged with
  • 48
  • 48
  • 48
  • 43
  • 28
  • 18
  • 18
  • 17
  • 17
  • 17
  • 17
  • 16
  • 16
  • 16
  • 15
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Automatizované měřicí pracoviště pokusných článků olověného akumulátoru / Automatized measuring apparatus for lead acid battery cells

Čapek, Ivo January 2008 (has links)
This presented work deals with the development of an automated station for the measuring of experimental cells of the Lead Acid Battery. The principle is to design a measuring station and make programs for cycling of cells in standard and PSoC modes.
22

Vývoj ovládacího programového prostředí pro autonomní fotovoltaický systém / Development control programme for autonomous fotovoltaic system

Janáč, Stanislav January 2009 (has links)
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.
23

Vývoj fukčních bloků pro autonomní fotovoltaický systém / Functional blocks for the development of autonomous photovoltaic system

Ovesný, Karel January 2011 (has links)
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.
24

Vliv přítlaku a aditiv na životnost olověného akumulátoru pro hybridní elektrická vozidla / Influence of pressure and additives on cycle life of lead acid battery for hybrid electric vehicle

Přívozník, Tomáš January 2012 (has links)
This master’s thesis deals with lead acid battery in hybrid electric vehicles which operating at mode of partial state of charge (PSoC). In this mode, there is often a negative electrode degradation mostly due to irreversible mechanism of suphation. The idea of this work is detect ideal value of mechanical pressure exerted on active mass of negative electrode in combination with additives to prevent mechanism of sulphation and lead to increased cycle life of lead acid battery.
25

Vliv různých typů AGM separátorů na parametry olověných akumulátorů pro hybridní elektrická vozidla / Influence of different types of AGM separators on parameters of lead-acid batteries for hybrid electric vehicles

Čada, Miroslav January 2013 (has links)
The most used type of the secondary energy sources is the lead-acid accumulator today. It is also used as a propulsion in hybrid electric vehicles. Functional principle stayed same as in foundation time, only parameters are still improving. Lifetime of lead-acid accumulator is influenced by used separator. The work deals with the description of properties of lead acid separators, methods of testing and evaluation of the suitability for use.
26

Analýza teplotních dějů uvnitř článku olověného akumulátoru v režimu kyslíkového cyklu / Analysis of thermal processes inside of lead acid battery cell in oxygen cycle regime

Vondrák, Michal January 2013 (has links)
The aim of this thesis is the analysis of thermal processes in lead accumulators with oxygen cycle. The work is explaining the structure and principle of operation of the standard lead-acid battery and lead-acid battery with oxygen cycle. Generally are described thermal action inside a lead battery with oxygen cycle and the different types of heat generated during operation of the battery are discussed in detail. One chapter describes the practical experiments and their results.
27

Studium vnitřního odporu článku olověného akumulátoru pro hybridní elektrická vozidla / Study of internal resistance of the lead acid battery cell for hybrid electric vehicles

Vojtíšek, Miloš January 2013 (has links)
This work aims on acumulators for hybrid vehicles and deals particularly with research of inner-resistance of the lead-acid batteries. There is a brief characterization of hybrid cars in first part of the tesis. Second part is dealing with design of experimental measurement setup for measurement of lead-acid electrochemical cells. Set of experiments on several cells was performed, description of experiments and results in graphical form are present.
28

Cyklovací režimy olověných akumulátorů / The cycle modes of lead-acid batteries

Mičák, Tomáš January 2013 (has links)
Main goal of the diploma thesis is to examine lead-acid accumulator and to study cycling modes in different setups. Theoretical part describes history, types of maintenance-free batteries, degradation mechanisms and possibilities to remove them. Practical part involves the production of electrodes and experimental cell, composition of active mass and measurement of internal resistance. Different configurations for deep cycling are researched as well. The results of the work are summarized and commented at the conclusion of the thesis.
29

Zkoumání vlivu oxidu titaničitého na životnost olověných akumulátorů s aplikovaným přítlakem / Influence of titanium dioxide on the life of lead acid batteries with applied pressure

Řihák, Pavel January 2013 (has links)
Hybrid electric vehicles use lead acid batteries operating under partial charge. Battery life of these batteries is dependent on the speed of development of lead sulphate (PbSO4) to the negative electrodes. Different admixtures are affected battery life. This work deals with the influence of titanium dioxide on the negative active material in lead battery. Mainly devoted to the influence of the applied pressure.
30

Vodivá keramika v olověných akumulátorech / Conductive ceramic as additive in the lead-acid accumulators

Šrut, Martin January 2013 (has links)
Lead-acid batteries are most used secondary electrochemical power sources. Their basic principle has remained the same for several years; only the operating parameters are in development. Lead-acid batteries are used in hybrid electric vehicles (HEV), which operates in the partial charge PSoC. Sulphation is one of the possible failures lead-acid batteries in the HEV, especially the negative electrode. By adding additives to the negative active mass can reduce the rate of sulphation and increase ability to accept an electrical charge by negative electrode.

Page generated in 0.0332 seconds