How to chose the right battery capacity and cells?
This blog mainly discuss the Li-Mon2 18650 cells, because it is most popular use on our electric bikes. For more information about LiFePO4 and the other cells please search on internet get more message. The other blog is why LiFePO4 battery is not common use on ebike and ebike kits.
First we list the common sells we normally use.
|Samsung||Model NO||Capacity||Discharge rate|
Those are common use Li-Mon2 cells for electric bike and electric bike conversion kit. But it not means don't more capacity use.
As we know 18650 cells voltage is 3.7v, capacity as sheet show. And you could also see that discharge rate 2c /3c /5c. 2c battery mainly use on low wattage motor ebike and ebike kit. 3c / 5c is better use on larger wattage motor e bike and e bike kit.
What is 2c / 3c / 5c ?
The general charge and discharge current size of the commonly used charge and discharge magnification to that,
That is: charge and discharge rate = charge and discharge current / rated capacity; For example: rated capacity of 100Ah battery with 20A discharge, the discharge rate of 0.2C. Battery discharge rate C, 1C, 2C, 0.2C is the battery discharge rate: a measure of the speed of discharge. The capacity of 1 hour discharge is completed, known as 1C discharge; 5 hours discharge is completed, it is called 1/5 = 0.2C discharge. The discharge capacity of the battery can generally be detected by a different discharge current. For the 24AH battery, the 2C discharge current is 48A and the 0.5C discharge current is 12A.
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