jackhammer74

I searched for almost an hour, but I couldn't find much that would help my situation. I just got two 3000HV packs from Integy, I assembled them and today went to charge them, the first pack I charged at 4.5A and 30mv cuttoff it false peaked after 17 min., the second pack I attempted to charge at 4.5A and 20mv cuttoff it false peaked after 16 min.
What do you guys advice? I heard something about the 4.5A setting on the Superbrain not being very accurated, is that it? What settings should I use? Please no smart coments, I know I should just get a better charger, but right now that's just not possible. This is the one I've got to work with. I appreciate any help anyone can give me. Thanks

David Root

Superbrain good charger. Are these Sanyo 3,000s?

First, you have new batteries and they are going to false peak no matter what charger you use.

Second, after a few cycles, use your peak detect to adjust how warm your batteries are once the charger is done. try setting the peak to 30 or 40.

Danny at SMC used to recomend 70 mv for Sanyo 3000 HVs. I think this is quite high, but it worked for them. Your batteries should be warm to hang on to, around 115 F give or take if you are racing. Less if you are playing in the back yard. 4.5 amps is the way to go for these cells.

itchynads

20mV is a bit low for Sanyo 3000HV cells. Try bumping it up to 50mV, thats what I normally use.

Alternatively, check that your power supply can cope with the current draw of the charger.

Bear in mind I use a different charger (Eagle CDC 6.0B).

R C king

I useto have that charger and i charged my 3000's at 50 mV.

jackhammer74

Thanks for the responses guys.

1. yes they're the SANYO 3000HVs
2. I'm sorry I wrote "cutoff" I meant peak, I don't know what the
Heck I was thinking last night.
3. Itchynads, it was at home that it happen. I haven't tried
charging them from my car battery just yet.
4. I thought 50mv would be too high, but I'll try that.

ChristopherKee

iTrader: (28)

4.5A 50mV watch the readout. 9.0+ is charge... first few times with new HV's it always falls peaks on the SupBrain.

keep hitting the buttong till they are charged then you should be fine.

jackhammer74

Thanks Christopher, I'm doing that right now.

The only thing is, I thought restarting the charge once they false peaked was a big no-no with nimhs.

David Root

Check the time the batteries take to charge. 3000s at 4.5 amps should take about 45 minutes to charge FROM DEAD. If you discharged your pack to .9 volts per cell, it will take about that time to re charge. if the charger beeps in 20 minutes, they are not done for sure. The pack should be warm to your touch, then you know they are done when the charger beeps.

HItting stare again when they are not done is the only way to get them to finish charging. No biggie.

D. Root