DrkAngel
1 GW
I have been testing a prototype 22.2v 41.6Ah pack, on 24V ezip eBikes.
Range is very impressive, weather turned lousy so full results delayed, but performance seems anemic ... at best.
Of course, it is possible that I have just become spoiled.
My typical battery builds run at 25.9V.
After deducting road load and wind resistance, there is a certain amount of available torque for acceleration.
Hmmm ... As shown in the following graph, at 16 mph, after you deduct road and wind resistance, my 25.9V pack supplies more than 2x the available torque compared to my 22.2V pack.
No wonder the 22.2V pack seemed anemic!
Of course, at lower speeds, this difference diminishes, but it is extremely important to consider torque differences at your project speed goals!
Who would have thought that a 12% decrease in voltage would make such a drastic difference at performance.
Range is very impressive, weather turned lousy so full results delayed, but performance seems anemic ... at best.
Of course, it is possible that I have just become spoiled.
My typical battery builds run at 25.9V.
After deducting road load and wind resistance, there is a certain amount of available torque for acceleration.
Hmmm ... As shown in the following graph, at 16 mph, after you deduct road and wind resistance, my 25.9V pack supplies more than 2x the available torque compared to my 22.2V pack.
No wonder the 22.2V pack seemed anemic!
Of course, at lower speeds, this difference diminishes, but it is extremely important to consider torque differences at your project speed goals!
Who would have thought that a 12% decrease in voltage would make such a drastic difference at performance.