Ok so i got some ebike batteries from a shop I stopped by to recycle and found this stuff used for the Main positive and negative output groups of the battery. Really cool shit, its .5mm nickel clad copper with .2 mm welded to it for the cell connections. Seemed legitimately the highest ampere connection I’ve ever seen and i was kinda sad to tear it down as it was just a bad bms for the pack but the voltage was wrong for what im doing.
The cells in it are pretty cool but have no real online presence except on alibaba and tested at 4600mah and ir of about 100mohm. Spec on the one seller states new ones are 5kmah and ir of .02 but the ones i got were warranty discarded as the bms died at 5-10 cycles… so probably false specs.
@vegr0 i can send what i have from the demolition if you’re interested
Did a day with the bms unplugged and pack 1 continues to drain…18650store CS are absolute braindead morons with replying to my emails, ive asked them to send me the 6 cells i need, but instead just replying a few times with an absolute wall of word salad bullshit on how its almost impossible for it to be the cells and its up to my building skills.
Between the cells on the 2 packs I’ve got is just hot glue.
Cells themselves don’t really have anything else just a ton of kapton.
On has what appears to be duck tape to cover the pcb connections and other just kapton.
Ok so the sheets im using will be 75mm x 120mm long.
Did you arrive at 300A based off the 120mm measurement? Because this whole time i’ve been going with the smaller measurement ( 50mm + 30mm) to get the rated current for the nickel.
With 50+30 i got 226A acceptable, and 302A hot/poor, and my next question is say I’m pulling 300A, how bad is it that the nickel will be reaching into the ‘hot/poor’ territory?
