Although the ideas and concepts of electric bicycles began in 19th century and have been developing over the years, their first realization took place many years later, attracting the interest of many. More and more people have become interested in alternative forms of transportation that do not pollute the environment with exhaust gases and offer cheaper means of transportation with the prices of petroleum products reaching record heights. The market was thus taken over by electric vehicles, among which mostly electric bicycles, scooters, electric motor bike and electric cars. The electric bicycle, with its advantage of being affordable for many people, enables a faster, cheaper and environmentally friendly mode of transport. It enables physical activity even for those who cannot use an ordinary bicycle due to health issues and the elderly, who can now cycle more than usual with less effort.
In the diploma thesis, the main task was to transform an ordinary mountain bike into an electric one. First I had to look at the possible ways and types of bike electrification and choose one that would be the best compromise between price, technical suitability and difficulty. I decided to use a lithium-ion battery and a central motor, which assists the user while pedaling. In this way one has the opportunity to preserve the beauty of ordinary cycling and at the same time, with the help of a motor, is able to overcome longer distances and more challenging terrain with less physical effort.
After the conversion, some problems appeared, such as the loosening of the screws on the cranks and the motor, the chain screeching... Everything was successfully repaired and the result was a properly functioning electric bike that could reach 25 km/h with the help of the motor. The motor offers four settings/levels of assistance: ''eco'', ''tour'', ''speed'' and ''turbo''. The battery charging time was five and a half hours. The battery itself lasts up to 90 kilometers when motor is constantly used at the maximum level of assistance.
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