You won’t be able to use these unless you have a 26 pin plug for them to connect to. This is because these charger need the two wires to connect to each cell but bms’ and balance charger only have one wire in between each cell so unless you can find a way to connect it up like that this won’t work. And even then in my head it feels like the whole thing would short out because the positive of one little board would need to be connected to the negative of another since your cells are connected together. BUT FOR SCIENCE…
could I wire the batteries so that they connect to a plug and that plug would just connect to this off the board? that sounds ideal. that way I could bulk charge as normal with all 12s in series and then plug this thing in to balance sometimes. No?
STOP! This won’t work! I’ve seen people try to do this before but because the cells are all connected in series unless the individual chargers are isolated the voltage keeps increasing and the TP modules die. Wish this would work but it doesn’t sorry! Unless your talking about a bunch of individual cells alone and charging them individually like @Blasto mentioned, nope.
yea I think putting the bms charging thing in the board is surely easier…but…how about if I used 12 linear power supplies instead of switching would that work?
can you sum up for me why a linear supply wouldn’t be isolated? I’ve been researching and my understanding is very minimal. I thought linear supplies were just like transformers and I assumed all transformers were isolated as they have two coils which are physically separated. the more long-winded with sidetracks the better.
and what of @Quezacotl thing above where he uses even switching supplies all connected to one power source and one big battery in series I believe
From what I understand they are not isolated at all though I could be wrong. Also it doesn’t matter if they are because even at only 5V 1A the modules are going to get very hot and super inefficient. And @Quezacotl seems to be using isolated individual power supplies and still it seems very un reasonable and defeats the purpose of this all together.
Why not put a charge only BMS in the charger and use mini USB-C for charger-battery connection, usb-c natively does 100W, it’s 24 pins allowing for up to 10S using 2 pins per S, with 2pins per main lead, or 12s using single pin and plenty left over for main leads
need not have wires coming out of the board and instead one of those plugs he’s talking about imbedded into the side of the board or something. i’d like to see how it looks on the board side
I feel like then it’ll make more sense to use a normal hobby grade balancer because of the better balance current and ability to change cell count. Also on the connector side it’s just more stuff that could go wrong, I prefer my GX16 connector on the side if my board and that’s it.
Good point forgot about the 12S balance charger rarity lol. And BMS’s usually aren’t very big and can fit on top of the batteries or somewhere else that’s not in the way. Less abuse on the BMS, well yeah maybe but I really think the BMS is the last thing that’s going to break from abuse, your VESC is gonna die far before lol. Though I guess it depends from board to board.
