Here's the deal: due to cold weather, plus maybe aging, my 16s15p 2.2ah 1.5C lithiums are only putting out 30amps total after 25% of pack capacity is drained. Extra voltage droop under 30 amp load is also preventing my formerly 35mph bike from going more than 30mph -- unacceptable!
Here's my radical hybrid idea: Add in parallel one 3ah emoli lithium mangenese cell to each of the 16 parallel subpacks of lithium cobalt cells. So the total pack would be 16s16p (15p li-co + 1p emoli)
Projected benefit: With it's much lower impedance, the single extra emoli per subpack (impedance of these cells supposedly does not increase over the life of the cell as it does for lithium cobalt) I'll be sure to get my full 35 amps back, plus less voltage droop, plus a bit longer run time, plus less wear on the lithium cobalts which apparently are not really 1.5C cells after all.
Possible problems: charging you should not present any problems, but discharging might. As the other lithium cobalts will only give 30 amps max, the emoli cells may be at risk of draining to zero if I'm pulling 35 amps for an extended period. Perhaps there's other problems I'm not anticipating?
What do you guys think?
Fetcher, Leeps, etc, what sayeth the electrical engineering wizards?