@@ianhelsbyservices I'm not sure what the run time should be, but as you know I favour not taking cells down to the BMS cut off. Another way of looking at it is that each cell in series adds voltage at the standard 2Ah rate. Interested in any of the recent pots? Cheers
@@ianhelsbyservices That would be true if the cells were in parallel, but these are in series to gain the 24V - so they are each having to produce 20A. I don't know if Andy has checked to see what the cells they used are, but there are some specialist high discharge cells available. I would think it unlikely these are low powered cells, as they'd decline in days rather than months/years in use.
@@ianhelsbyservices I suppose a voltage regulator would be needed to reduce the gate voltage, maybe a smoothing capacitor and a resistor to short out the gate when off, cheers
20A DC,fairly spicy, 500w is a pretty decent size for a little hand held!
At that current no wonder the BMS pack up and surprising that the cells handle that as they are only 2 amp, cheers
@@TheInfoworks 20Amp dividided by the 6 cells gives you 3 1/3rd amps per cell. 36minute run time. Poor cells.
@@ianhelsbyservices I'm not sure what the run time should be, but as you know I favour not taking cells down to the BMS cut off. Another way of looking at it is that each cell in series adds voltage at the standard 2Ah rate. Interested in any of the recent pots? Cheers
@@ianhelsbyservices That would be true if the cells were in parallel, but these are in series to gain the 24V - so they are each having to produce 20A. I don't know if Andy has checked to see what the cells they used are, but there are some specialist high discharge cells available. I would think it unlikely these are low powered cells, as they'd decline in days rather than months/years in use.
Cheers Andy mate
Pat, that's the end of this experiment, for the moment, cheers
Either buy a 24v 20A mains power supply wired directly, using the wall switch to turn it off and on.
I think the Gtech are a superior option.
How many scrapped ? Lots🤯🌝👍. Good cells tho a bit of a pig to strip down 🙄
Yep, though the vice method seems to work, well worth keeping for cells, cheers
Switch with capacitor to avoid sparks ?
Definitely, any time large DC currents are switched, great learning, cheers
Thanks, I was wondering how you'd overcome the arcing without expensive DC switchgear/contactors.
50A MOSFETs only a pound each tho.
@@ianhelsbyservices I suppose a voltage regulator would be needed to reduce the gate voltage, maybe a smoothing capacitor and a resistor to short out the gate when off, cheers
@@TheInfoworks true. Most Fets have a 20V limit on the gate.