went for my first ride today under lipo power.
some interesting observations from a first time lipo user....
according to the CA, i drew 3.5ah of the available 8ah. so i should have had batteries that were just over 50% SOC
at the end of the ride.
testing with my cell checker once i got home reveals that there is less then 50% ?
pack data from the end of the ride.
22.86 V total
22.88 V total
45.74 pack total voltage at the end of the ride.
voltage at the start of the ride was just on 49.7V
i don't know what to believe. the cell checker of the ah drawn on the CA ?
it is interesting to note the very different discharge curves of Li-Po vs LiFe
the LiFe pack would remain at a fairly constant voltage for the entire ride, only sagging a little under load.
while the LiPo doesn't sag like the LiFe does, it's voltage does not remain a constant at all.
can someone please help me to understand these numbers ?
Diamondback wrote:this was the first cycle of any kind on them. temperature today was a little cool but not too much.
i think most of today was around the 17c-19c range.
my charging regime with lipo (even my RC car and boat ones) is to terminate the charge at 4.150V per cell.
i have the LVC on the CA set at 42V (3.5V per cell).
i am currently charging them to storage only at the moment, it will be a few days until i will ride the bike again.
so i should figure on 6ah useable on the batteries ?
guess that makes much more sense with the numbers i saw on the cell checker.
no way am i going to let them get to 3.0V per cell or less. 3.5V is low enough.
thanks for the info.
edit / update....
storage charge completed.
according to the charger it delivered 2023mah & 2095mah respectively and the batteries are now back on 67%
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