Quote:
|
Originally Posted by Patrick
Does this mean your going to use 8 in series to get 20volts and use them as your batteries? (power the motor by themselves) :eek:
Sound interesting if you are. They don't have the enery density of good batteres though do they? Still pretty light if there 29grams each, but I have no idea how or if you can compare mah to farad.
|
Just using the capacitors alone, you would have one good high speed run; the charge (voltage) is linear to the amount of charge left, intrinsically, that's what a cap is.
I would use them as a hybrid pack, battery delivering the energy (as a low constant current), and the caps delivering all the peak power. Doing this, the system voltage will stay very high, near nominal voltage, with less than .4 volts of vdroop. It would be neat though, you would have off the charger voltage available for power after you charge, for a few moments.
You gain a little energy from the cap itself, and also from less strain on the battery, it will deliver it's true (or very close) mah rating, as well as little wasted energy due to vdroop. So, if you were to use an eagletree to measure the running performance of the battery without ultra-caps, it will look like
THIS
Then if you add the ultra-caps, it would look something more like
THIS, more of a constant discharge at low rates, and higher voltage.