7 cell lithium pack. First long ride. Good range?

[unclejemima]

I've got a 7 cell 24V 8ah (4.2v per cell charged) battery that I converted from a 3.6AH 24v NiMH unit.

I went for a 20 mile ride yesterday and it was still running when I got back to my surprise. Checked my voltage when I returned and had 26.4V left on the meter for all 7 cells.

This means 3.77v per cell. When will the BMS typically cut the power? At 3.7v per cell? How much further could I have gone?

I'm thinking this was not bad range for the 8ah tiny battery. What do you guys think?

 

[Ykick]

I've got a 7 cell 24V 8ah (4.2v per cell charged) battery that I converted from a 3.6AH 24v NiMH unit.

I went for a 20 mile ride yesterday and it was still running when I got back to my surprise. Checked my voltage when I returned and had 26.4V left on the meter for all 7 cells.

This means 3.77v per cell. When will the BMS typically cut the power? At 3.7v per cell? How much further could I have gone?

I'm thinking this was not bad range for the 8ah tiny battery. What do you guys think?

It does not mean 3.7V/cell unless cells are perfectly balanced. Fact is, you could have one or more cells sagging well below 3.3V and not know unless you're logging individual cells during discharge.

With enough pedaling and easy terrain many of us can easily travel 50 miles on 8Ah (balanced discharge) or only 5 miles if we demand lotsa power. Without knowing how you ride/pedal and type of terrain there's little to compare.

 

[unclejemima]

Thanks.