is electric bike charged through alternator in running condition via wheel rotation?
cycle is as below
battery—motor——speed reducing gear train—–wheel——-pulley—–speed increasing gear train ——alternator—–battery
two batteries of 12V are connected in series
I am not familiar with electric bikes, but your proposal is out of the question as you imply that the battery drives the bike and charge itself at the same time. Impossible!
the answer is NO.
only 110v\220v charger is available for now.
What you suggest is a feature, a good one.
I think that a solar panel on all electric vehicles can be nice and charge the battery too.
http://www.greenvh.com/