I know that the general rule seems to be "higher is better" when it comes to voltage, but why?
Is it because current is higher when voltage is lower? What if peak current is handled by capacitors?
The reason I ask is that it seems to me you could save a lot of battery cost and weight by going with (say) a 72 volt system for a small car conversion (like my 1973 Fiat @ 1600 Lbs GVW/ICE). I'm thinking about a hybrid storage system running several parallel strings of 3 x 24V Nilar 9Ah NiMH packs supplemented by a series string of 6 Micron PowerPak "super caps" to handle acceleration and other demand surges.
Many of you know that I'm also interested in coupling a 3rd source (like a small diesel genset) to create an unlimited range EREV (home-made series hybrid).
I'd love to hear from our experts on whether this concept has merit or what are the flaws?
