Re: Question: capacitors as special use batteries?
- From: BobG <bobgardner@xxxxxxx>
- Date: Fri, 11 Jul 2008 17:22:33 -0700 (PDT)
On Jul 11, 6:03 pm, John Larkin
You're not going to get more power out, on average, than you put in.=====================================
Drills use a lot of power, so if a 2-minute charge yields 2 minutes of
drilling, it's going to be a *big* charger.
Batteries aren't as efficient as caps (joules in:out) but batteries
tend to run constant-voltage during use. Caps lose voltage linearly,
so will need downstream electronic switching regulators to keep up the
load as they discharge.
I bet you could build form-fit-and-function battery packs for a drill
using boostcaps and a wide input range switcher like you said. You
drill for a couple minutes then change the pack out. The charger could
hump 50 or 100 amps into the pack being charged and charge the thing
up 10x faster than it discharged under use. Better than the charge for
several hours arrangement they have now.
.
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