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Li-ion traction battery 28V/40Ah for an electric bike
Bartošek, Martin ; Červinka, Dalibor (referee) ; Vorel, Pavel (advisor)
Thes is deals with the construction, protective circuits and lifetime of lithium ion batteries intented for powering electric bicycles. The entire battery is composed of Li-ion cells with the designation 18650 from Sanyo company, which are connected via series-parallel combination. Because of the series connection of the cells, it is necessary to add protective circuit to each cell to prevent overcharging or deep discharging, on which Li-ion cells are very sensitive. Absence of these circuits could cause irreversible damage to the entire battery pack. Life of Li-ion cells depends on many aspects. These aspects have an influence on the electric bicycle itself. They have an impact on the range and the number of charging and discharging cycles against the considerably high price of the battery.
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Non-sporting Topics on TV Studios of ČT sport and TV Nova During the World Cup 2022
Bartošek, Martin ; Němcová Tejkalová, Alice (advisor) ; Macková, Veronika (referee)
Bachelor thesis Non-sporting Topics on TV Studios of ČT sport and TV Nova during the FIFA World Cup Qatar 2022 deals with non-sporting topics in the pre-match studios of ČT sport and TV Nova during the FIFA World Cup Qatar 2022. The selected pair of media outlets represent the only owners of the broadcasting rights for the the FIFA World Cup Qatar 2022 in the Czech Republic. It is also a comparison of sport's broadcasting on public and commercial TV. The research is conducted during the entire course of the football championship, that is all pre-match studios of both TV stations from 20th November to 18th December 2022. The theoretical part focuses on the position of sport and football in media. It also describes selected non-sporting topics from the history of sports journalism as well as the FIFA World Cup Qatar 2022. The quantitative content analysis identifies and compares the total time spent debating non-sporting topics with the rest of the sports discussion. It also follows the incidence and frequency of non-sporting topics on ČT sport and TV Nova. The qualitative content analysis attempts to describe the process of these non-sporting discussions and tries to find similarities or differences in the way they are conducted.
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Li-ion traction battery 28V/40Ah for an electric bike
Bartošek, Martin ; Červinka, Dalibor (referee) ; Vorel, Pavel (advisor)
Thes is deals with the construction, protective circuits and lifetime of lithium ion batteries intented for powering electric bicycles. The entire battery is composed of Li-ion cells with the designation 18650 from Sanyo company, which are connected via series-parallel combination. Because of the series connection of the cells, it is necessary to add protective circuit to each cell to prevent overcharging or deep discharging, on which Li-ion cells are very sensitive. Absence of these circuits could cause irreversible damage to the entire battery pack. Life of Li-ion cells depends on many aspects. These aspects have an influence on the electric bicycle itself. They have an impact on the range and the number of charging and discharging cycles against the considerably high price of the battery.
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