Anyone give me any advice on how too revive some 3am 24v nicad packs? Their fairly old but are still holding some volts, yet I don't know how to treat them, good hard cycle or a low amp slow one?
You need to cycle them at around 4amp charge ish it don't matter too much, you propably have a few cells gone so you will have to test to find them 1st and replace them as cycling won't work with damaged cells in the pack.
I got so pissed off doing this so I changed to a123s as the charger automaticly balances.
So take off all the heat shrink and test all the cells, if they read 1.2v then their fine, or could I get away with testing the whole pack and buying enough cells to replace them all, then find the old cells?
I've got all the chargers for Nicads so would like to try and use them, won't be cheap but probably still cheaper then buying A123 chargers and batteries
no dont take heat sink off just yet
measure voltage ie 24v
if 24v then charge fully then discharge 3 times or run the bot down street till dead then charge
normally a good charger can cycle theses
if u dont have say 24v then yes have to strip
I've checked my packs and one is 21.6v, the other two are about 16v, so go and take heat sink off and try and find some replacement cells?
They hold 24v after being charged but soon drop back off
16volts is very low, if you have that many cells gone, the rest won't be far behind. You will struggle to get hold of the cells nowadays as well.
Found a source of cells, around £5 a cell, don't know if it's worth a shot and try too get the Nicads back in working order or stick with SLA's till I can afford A123 packs and chargers, though I'm bot sure how much it would be for 3 12v packs
http://www.ebay.co.uk/itm/10pcs-New-Ori ... 211wt_1114
you'll want atleast 3 packs of 8 cells so you're looking around £130 for batteries plus another £100 for a cellpro 10s charger.
Not as bad as I though it would be but would 2300mah be enough?
3x 2.3ah = 6.9ah. That should be enough for bulldog as you're only running Bosch 750s on 24 ish volts.
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