Hi Ron,
If you currently achieve 28km/h
(17mph) with a 36V battery the most you could expect to achieve would be 37km/h
(23mph), but in reality this speed will probably be a bit lower due to the additional wind resistance encountered at the higher speed.
Converting your battery from 36V to 48V is definitely not a straightforward job, as your pack's existing 10 groups of 4 cells
(10S4P) would need to be reconfigured into 13 groups of 3 cells
(13S3P) and you would also need a suitable 13S
BMS.
The cells should ideally be spot welded together as soldering them could cause permanent damage to the cells due to the amount of heat that is likely to be absorbed by the cells during the soldering operation.
The 42V maximum charging voltage of your existing 36V charger would be too low for the reconfigured battery, as a 13S pack would require a charger with a 54.6V maximum charging voltage.
Please note that the battery capacity would also be reduced from 13.6Ah to 10.2Ah resulting a noticeable reduction in your available range.
Your existing 36V throttle would still work fine as a throttle control with a 48V battery, but the LED battery gauge would be severely overvolted and would continually indicate 100% remaining battery capacity
(all three LEDs would remain lit until the battery voltage was so low that it would eventually cut out completely), and the throttle unit would also get very warm during use.
Check out
this post for further information.
Alan
