I just got rid of the same pack a few days ago that had 2 cells that were punctured slightly but still worked. The other 3 cells were fine only a handful of cycles on it. I wish I would have saved it for a couple days but I wanted it gone. It even smelled sweet because of its contents leaking out.
Yea the BMS is charge only because theoretically you could pull 250 amps continuous and 350 amps peak but I’m not sure the wires/connectors/vesc would like that so I just run 60 amps per motor. Surprisingly the range is only like 12 miles but that is quite aggressive riding with lots of hills. The torque is nice even with my current gearing of 18/62 on 160mm wheels.
I have two cells out of that exact pack but shipping would kill it i guess.
edit: Just as I thought, shipping is almost impossible and its cheaper to just buy a new 5s pack
Having 2x 5s cells is the same as 10x 1s cells. You still need to balance charge all of it. I will say though that lipos do not like to be over discharged and cut off for them is higher than LiIon. Are you positive you have the correct battery settings?
Yes, positive, thank you. I have the two 5S LiPo’s wired in series to a 10S BMS, with all balance wires properly connected.
I multimeter tested everything to confirm that one cell is dead in one of my 5S packs. Bad cell reads something like 0.1 or 0.2V, confirming that the cell is completely dead.
You can build a pack to have balance leads with a bit of time and patience. What is the Min voltage and current settings you have set on your Vesc?
Also note that C ratings are often meaningless or at best just guidelines to higher quility cells. I have some GnB cells rated to 95c that trounce CNHL 130c cells of the same capacity/price for my race quads. After buying so many different brands GnB are what I buy now. Turnigy cells are pretty low end to be honest but then again esk8 doesn’t require the same amp draw as flying .
Well I bit the bullet and bought a replacement Turnigy pack, along with some additional connectors and other battery accessories. I just want to get this board operational again.