Range

if you use the cellogs like dogman talked about you can watch the discharge of each cell and keep track of the individual cell voltages. set the alarm at a level you know is gonna be outa range, like the 2.9V i use and then when it alarms you can see which of the channels is the low one.
then you can monitor it when you charge and determine if it is not getting a full charge and you might be able to force it to fill up with charge and then remove it as a limitation on the range.

i am gonna try to carry a reserve pack to use to restore a really low outa range cell on my big lipo/lifepo4 pack.

it is made up of several of the little lifepo4 pouches that i have charged up so i can clip them on to the low channel and transfer the charge from the reserve cell into the low cell in the pack, to allow the remainder of the pack to discharge too. 4 pouches with 3.8Ah capacity left. otherwise scrapped for low capacity. using little alligator clip terminated jumper wires. keep them stored in a cardboard box to fit in the glove box.

that should add a lot of capacity to the pack for little amount of reserve storage and cost.
 
DrkAngel said:
Everyone likes more speed!
Well ... most everyone.

What most don't realize is the cost of more speed.
Pulled from the ebikes.ca simulator, I noted the various ranges supplied at different speeds.

Generic Mountain bike - motor only.
665w peak output motor w/48V 10ah battery = similar to a 24V 450w peak output eZip motor - pushed to 36V 675w peak output motor.

Anyway
10mph = 46 miles range
15mph = 30 miles range
20mph = 20 miles range
25mph = 13 miles range
30mph = 8 miles range

Wow! ... calculator - click click click ... Every 5mph increase in speed decreases range by 33%!


See - Speed vs Range

file.php


See - Motor Output Watts for MPH


Also see - Efficiency
 
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