A123 Hypersonic Charger Balancing/connector

[Finnster]

Originally Posted by t-maxxracer32

what do you use to measure the voltage count? id really like to get me one of those.

thanks!

That would be a voltmeter, available at most home supply stores (home depot), Ratshack, hell even pep boys for cheap ones. :027:

I was basically doing the same thing last night. I took my pack apart and prepped the cells. Stupid thing tho is I was easing the cells out of the casing, when all of a sudden it just went and all the cells crashed to the floor looknig a like a string of sausages. Worse yet its there was a little spark. :o One end has a little scorch mark, but for the life of me I can't find what bit it shorted against. My batt luck has been a bit down lately, despite the extra care I've given.

However, its not too bad. So I'll just see. I tested every cell, every one was 3.301V, so I would say currently well balanced. I'm not sure if i will add balance taps. I prolly should/will, but many others have stopped balancing as it seems they tend to self balance.

I made two cuts in the tabs to create a 5S pack and a 2S and 3S. I shooglued them together (like making nimh SxS), and tonite I'll solder a bit hopefully. I'm going to offset the packs to minimize the width. Looks like final width will be just over 50mm, about same width as TrueRc lipos, so should fit in my batt tray w/o mods.

(Poorly) Illustrated:
-ooooo+
.-ooooo +

versus as packaged in 10S
ooooo-
ooooo+

[brijar]

I've done some looking around, but I can't find if anyone has successfully used the Dewalt 36v 1hour charger to charge these batteries. That would save me a lot of money if I could just buy one and do a little bit of rewiring. I wouldn't even need a power supply.

I will have 4 packs that the Hypersonic charger can charge, so it will take me an hour to charge all 4 at 15 minutes each. The Dewalt will charge all 4 packs at once in an hour, but costs a lot less on Ebay. I guess I wouldn't have to do very much rewiring, but just make a harness that plugs into the balancer thingy that I took out of the pack, and then attach the balancer thingy to the charger.
The only thing I don't like about that is that I won't be able to charge just one or two packs at a time. I'll have to have all the packs discharged about the same before I can charge them.
I think I may just stick with the Hypersonic Charger.

Brijar!!!