g1nko
10 mW
I'm running lipo batteries in a 12s2p config. Each pack is 5Ah so I should be getting 10Ah total. My commute is 16 mi round trip, so I took an 8.5 mi test ride to see the numbers before committing to getting to work and back on a new bike.
Because the batteries are also new, I ran them through a couple of charge/discharge cycles and they seem to be balancing and discharging pretty evenly; all the cells are within 0.02 tolerance. Two of the packs are dead on at 4.20 4.20 4.20 4.20 4.20 4.20. The other two read 4.20 4.19 4.20 4.20 4.19 4.20.
I'm new to lipo and spent a few weeks reading and learning on these boards because I really don't want to be a statistic. One of the suggestions I read here said to be very conservative with the low-voltage cutoff around 3.6v per cell, so I set my LVC to 43.2v.
The batteries read 50.2 hot off the charger. At the end of the 8.50 mi ride, I had 46.0v and had used 3.13Ah. The fuel gage read about 1/3 depleted. FWIW, watt hours were 146.36, watt-hours/mile were 17.0 and human watt-hours were 19.01.
From what I see from these numbers, I should be good to go for the full 16 mile round trip. I'm a little concerned about the LVC considering the drop from 50.2v to 46v. How critical is it to be this conservative?
Also, when I went to charge the batteries after the ride, three of the cells looked almost identical 3.81 3.83, etc, but one looked like it hadn't discharged at all as the cells read 4.19 4.18 etc. Any idea what I'm looking at here?
Because the batteries are also new, I ran them through a couple of charge/discharge cycles and they seem to be balancing and discharging pretty evenly; all the cells are within 0.02 tolerance. Two of the packs are dead on at 4.20 4.20 4.20 4.20 4.20 4.20. The other two read 4.20 4.19 4.20 4.20 4.19 4.20.
I'm new to lipo and spent a few weeks reading and learning on these boards because I really don't want to be a statistic. One of the suggestions I read here said to be very conservative with the low-voltage cutoff around 3.6v per cell, so I set my LVC to 43.2v.
The batteries read 50.2 hot off the charger. At the end of the 8.50 mi ride, I had 46.0v and had used 3.13Ah. The fuel gage read about 1/3 depleted. FWIW, watt hours were 146.36, watt-hours/mile were 17.0 and human watt-hours were 19.01.
From what I see from these numbers, I should be good to go for the full 16 mile round trip. I'm a little concerned about the LVC considering the drop from 50.2v to 46v. How critical is it to be this conservative?
Also, when I went to charge the batteries after the ride, three of the cells looked almost identical 3.81 3.83, etc, but one looked like it hadn't discharged at all as the cells read 4.19 4.18 etc. Any idea what I'm looking at here?