https://www.amazon.com/dp/B07CPPS16K/ref=cm_sw_r_cp_apa_glt_fabc_4F3WJ6EF6E6XF9MT4KPB
Caution! Working with this stuff can be a pita!
2 Likes
Does the Evolve work normally without the original BMS ?
Except the voltage reading on the remote ?
1 Like
The battery i made for this particular evolve has the controller swapped for a unity. I am not sure about this, but I think the evolve controller works only if it’s paired with an evolve bms.
1 Like
Very cool PCB kit, I now fully understand why bioboards went this route.
Bottom could use some sort of protection against accidental shorts lol
7 Likes
Same on my PCB kits. I always cover the exposed terminals with fishpaper cus… yikes haha.
How do the cell holders affix to the PCB?
1 Like
Simply via spot welds…thinking of adding additional something to hold them better, hate for spotwelds to have to act as a structural component
2 Likes
Are the spot welded tabs not supposed to be soldered to the PCB? My experience with spot welding onto PCB pads is that they are not very strong, and they need to be reinforced with solder to have a good hold.
Kinda looks like the pads on the PCB were designed with that in mind, looks like those vias would provide a really secure solder connection.
4 Likes
So not sure exactly what sort of copper? Maybe the pads are made of. But the spot welds are suuuuper sticky. Can’t pry up even one weld. I think solder would help. But I dont think it is nessesary. But time will tell.
2 Likes
Fair enough! I know nothing about that PCB system, so I’ll assume that BioBoards did their due diligence with designing it 
3 Likes
15 Likes
I’m sure you already thought about it, but you can add some heatshrink around it
1 Like
15 Likes
Dam u swapped to copper braids now,ugh and i got alot of 12awg wire i was gonna use for my upcoming 12s20p but now seeing these braid builds makes the pack much thinner i want copper braids. Always making me jelly from these clean builds but it does teach me wat and how to go about setting up my own
1 Like
I wouldn’t say swapped to permanently, I found this really good, superfine strand copper braid, its much easier to work with and retains its flexibility much better then other stuff I’ve used. Silicone wire always a good call! But if you are looking to save a few mm of space, braid is the way to go.
2 Likes
Cheers 
im certain these braids does really well with high discharge builds
1 Like
Surface area is key. And this one offers alot of it.
Right, thinking i might do 3 braids for each p group to handle all the current
1 Like
12s20p is a huge pack, what is your layout? You might be better off spotwelding super wide nickel
Its gonna be two 12s10ps gonna do a standard 12 group flat double stacked layout. I am getting some wide nickel so i can cut into a 10 cell shape then spot weld another nickel tab over the 1st and fold it over. It probably sounds a bit odd from the way i explain it but tldr itll look similar in design to how u setup packs XD
2 Likes