user964813698
1 µW
- Joined
- Aug 16, 2019
- Messages
- 1
I have an old Sparta ION Extension 2009 electric bicycle which has a 20s pack of GP 900 DHC cells. These are NiMH 9000 mAh cells, a data sheet can be found at
https://elektronik-lavpris.dk/files/sup2/900DHC.pdf
The original controller (on the steer), motor controller and BMS are blocked from working when parts other than original are used. I already replaced the steer and motor controllers and the hub motor is running fine at 24 volts, 10 ampere when the wheel is loaded, on the original 20s battery pack. But this is in a test setup.
I want to keep the batteries in good shape and therefore want
top balancing of all cells
bottom balancing of all cells
over charge protection per cell
over discharge protection per cell
over voltage protection per cell
under voltage protection per cell
temperature protection per cell
logging of voltage and ampere per cell in time
I realize that this is quite a list of demands which would perhaps make this effort ridiculously expensive for a hobby project. Which features are realistic and affordable?
And yes, I know I can also replace the NiMH cells with some more modern type of Lithium cells, but I would like to try the original NiMH cells first. The are in good shape and I would find it a shame to simply discard them.
https://elektronik-lavpris.dk/files/sup2/900DHC.pdf
The original controller (on the steer), motor controller and BMS are blocked from working when parts other than original are used. I already replaced the steer and motor controllers and the hub motor is running fine at 24 volts, 10 ampere when the wheel is loaded, on the original 20s battery pack. But this is in a test setup.
I want to keep the batteries in good shape and therefore want
top balancing of all cells
bottom balancing of all cells
over charge protection per cell
over discharge protection per cell
over voltage protection per cell
under voltage protection per cell
temperature protection per cell
logging of voltage and ampere per cell in time
I realize that this is quite a list of demands which would perhaps make this effort ridiculously expensive for a hobby project. Which features are realistic and affordable?
And yes, I know I can also replace the NiMH cells with some more modern type of Lithium cells, but I would like to try the original NiMH cells first. The are in good shape and I would find it a shame to simply discard them.