I just bought an Astro Battery balancer board from a local RC model airplane store yesterday.
You are supposed to be able to leave it plugged into your lithium battery pack, and it will relentlessly balance your batteries before charging, during charging, and after charging. It can also discharge any battery cell that is overcharged beyond 4.25Volts
25 Apr 2009 3:50pm
- the board is no long blinking when I checked it, ie I don't know exactly when the board finished
Not bad! that looks like a 10mV acuracy in less than 24hours.
I'm going to put my yardworks batteries back into use. I'll use the existing BMS boards while charging and discharging, but I'll cycle this balancing board through the battery packs so each battery gets balanced every 3 or 4 day. If I get good results, I'll pick up a few more of these 'blinkys'
Test results for second battery:
12noon on 26Apr2009
It definitely seems like I would not want to leave this board plugged into a battery that is in storage because it was a way of slowly discharging the cells. However, the discharge is so subtle it would not be a problem with a battery that is actively being used on my bike.