I looked around for a while for a 12s balance charger for my 12s4p lithium ion pack I am building and many claimed they are too expensive, etc. I found one on Amazon for $200. It will be back in stock on 9/26/2017.
I have to make a diagram but I guess the way this works is to split the +/- leads coming from the 12s4p battery pack and wire one set of +/- to an XT90 connector and that will serve as the charge port? Then also use a 12S balance leads cable for the balance port on the charger. The other +/- leads would be connected into an antispark heading to the VESC/motors. Obviously, no BMS.
Is that the correct wiring?
Are there any other 12S balance chargers out there? I saw some from years ago but they are no longer made. I don’t know why it’s like that.
The solution doesn’t seem more expensive than a BMS ($43) + 12s charger brick ($55) from batterysupports which costs about $65 shipping via UPS/Fedex. So $200 vs $165 and you don’t have an annoying and space consuming BMS to deal with. Also, over time I read articles that the BMS will reduce the life of your batteries anyways.
yeah you are right, it can charge 2 x 10s at once though. I do 2 x 7s packs at once with mine. They show you a readout of each cell, you can adjust end of charge voltage and all kinds of stuff… data logging…
@pat.speed That wont work with the (2) 6S balance leads. Because it will expect in addition to the (2) balance leads… (2) XT-90 or XT-60 connections. But I only have a single xt60/xt90 connection coming out of my pack. What you are talking about is a more complex split circuit which seems difficult – at least for my electrically challenged brain…lol, I get series and parallel but there are a complex splits to break a 12s into (2) 6s circuits.