Can you think of an ingenious topology to make a bidirectional converter that can make a single large cell Lithium battery supply a 48V electric scooter drive?
Bidirectional converter for 48V electric scooter drive
I don't like it when people tell me, it can not be done, or that it's not practical or something like this.
I have a 500Ah iron phosphate cell and i want to make it work on my electric scooter. The drive works on 48V. I want to make a converter that would let me use this single cell as the whole battery of the scooter. I know, this is a bit unorthodox but something in this idea excites me, so it has do be done!
How would you build such a thing? It would also have to support electric braking, so it would need to be bidirectional and i was thinking that it can function as the charger for the scooter battery anyway as it would mean that it could be configured to use any normal DC supply for charging, from a normal 48V power supply to car batteries and laptop power supplies.
I was thinking about a crazy interleaved but in principle simple synchronous boost/buck converter with like 40 channels where the channels would only need to carry under 40W each as the normal total is under 1600W while driving 45kmh and about double of that for short accelerations. I was thinking on making it on a FPGA.
But is there a more sensible solution you can think of. A 2 stage solution comes to mind, but i 'm worried about efficiency :)