smeagol222
100 W
Not sure if this has been asked before
I know that charging batteries 18650 or other lithium to 80% increases their longevity quite substantially
So I was wondering, say my ebike needs 52v battery
Instead of building a 52v 14s (51.8 @3.7v per cell / 58.8v @4.2v per cell) pack and charging to 100% or charging to 80% (limited voltage range 47.04v - math correct? 58.8*0.8 to get 80%?)
Could I build a 60v pack (59.2v @3.7v / 67.2v at 4.2v per cell) but I would NEVER charge it to 100%
Charge to 80%? = 67.2*0.8 = 53.76v
Not sure if my math is right
But the idea is putting an extra cell or two in series and charging to a lower voltage to prolong the life of the pack?
There must be a reason why I haven’t really seen this before
Is there a flaw? Or does anyone know why not?
I know that charging batteries 18650 or other lithium to 80% increases their longevity quite substantially
So I was wondering, say my ebike needs 52v battery
Instead of building a 52v 14s (51.8 @3.7v per cell / 58.8v @4.2v per cell) pack and charging to 100% or charging to 80% (limited voltage range 47.04v - math correct? 58.8*0.8 to get 80%?)
Could I build a 60v pack (59.2v @3.7v / 67.2v at 4.2v per cell) but I would NEVER charge it to 100%
Charge to 80%? = 67.2*0.8 = 53.76v
Not sure if my math is right
But the idea is putting an extra cell or two in series and charging to a lower voltage to prolong the life of the pack?
There must be a reason why I haven’t really seen this before
Is there a flaw? Or does anyone know why not?