IssacZachary wrote:jkenny23 wrote:Had to buy a second one actually, fried one of the ASICs on the first after bad wiring...
How well does it work as a balancer?
Well since I fried my first one, and it doesn't balance any less than a full 96s pack, I haven't really tried it yet. There's lots of detail on how it works here: http://www.mynissanleaf.com/viewtopic.p ... d75c110590
It has a 430 ohm shunt resistor, which means less than 10mA balancing current at max charge. I do have a 1.8kWH pack made of salvage cells, and a Chinese BMS with about 30mA balancing current, and it has been plugged in for about a week and is almost fully top balanced now. Each series component in the pack is within ~134mAH (0.38%) of balance across 14s (35AH total capacity). So you can assume with only 10mA balance current or less you need a pack within maybe 0.1% of capacity delta across the series sets of cells.
I have considered making an expansion board that could work with any of these type of balancers, and add a larger balancing current in parallel.