| JosephDrok | Date: Vendredi, 25-Mar-2016, 9:35 PM | Message # 1 |
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| If you are looking for purchasing or building your own personal electric bike you will need to educate your bit on different technical terms to help you make the best decision when choosing batteries on your bike.
One term that could show up is watt hours or Wh for brief. A Watt Hours is an important measurement when determining the amount battery capacity you might need to visit a particular distance. It represents the entire energy available in confirmed battery pack. It is calculated by multiplying the amp hour or Ah of your battery pack by the complete voltage from the pack. A 36-volt 20Ah pack along with a 72-volt 10Ah pack both contain 720 watt-hrs; therefore they ought to both be capable of getting you an identical distance provided you ride on the same speed. With the 72v pack you are able to accelerate faster and have a higher top speed compared to 36v pack. If you take good thing about this (it's really hard never to use all that extra power) and ride at a higher speed you will confront more wind resistance burning up more power. This will cause your distance traveled before the batteries drained being under that from the 36v pack traveling with a lower speed nevertheless, you will reach your destination faster. With a Crystalyte 5304 hub motor in a very 24-inch rim and a motor controller set to 90 amps you are going to average around 35 to 45 watt-hrs per km (58-75 watt-hrs per mile). This is in a cruising speed of around 65KPH (40MPH) and no pedaling. How fast you accelerate plus your top speed will influence your power consumption. It will also vary depending on how flat or hilly the terrain is and just how much weight you happen to be carrying. You can use lower than 25 watt-hrs per KM should you ride really slowly (using the same setup mentioned previously) on flat terrain or use over 65 watt-hrs per KM riding full throttle up hills.
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