Time constants of batteries ? Answered
I'm trying to figure out the way solar battery charger work and I'm a bit confused about the following point.
I read that for batteries you could consider the PWM voltage to be equivalent to DC. This I understand well for average voltage (obviously it's the same), but what about the dynamics ?
If your PWM frequency is something like 100 kHz, that's a 10 µs period. Does the battery has time to follow and make big voltage and current peaks or does it just averages all that to more decent values ?
One way to put it is : Are the battery time constants indeed much bigger than the PWM period ?
Thanks for any idea on that topic !