So it begins...... Battery spot welder

[sternwake]

The AwithZ P20b spot welder arrived.

It laughed at 0.1mm copper, 0.1 nickel plated steel sandwich using 10% of its available power.  This is the maximum my 21$ purple spot welder could handle.

I had to crank the AwithZ upto ~70% power t before I could properly weld 0.15mm  copper with 0.15mm nickel plated steel sandwich.

I tried next to weld 0.15mm copper with 0.15mm pure nickel, and 95% power was not enough.
One of the two welds would be good to great, but the other would not stick, or just barely stick.

I tried many things, but the positive welding probe refused my desires.  50ms preheating, triple pulse with different intervals, no dice. not happening.

I next tried 0.1mm  copper, doubled, with 0.1mm nickel.plated steel at 99% power,.and got 2  solid welds.

Copper has 4 times less resistance as pure nickel.
In general most Esk8 battery packs.use 0.2mm pure nickel, even the high power builds with 18s6p batteries.

Ill be running only 10s1p so each cell.has to work hard, and will get hot doing so, so I.dont want the series  connections adding to the heat generated within a tight enclosure.

The Eve 40pl is a beast of a 21700 cell with a 70 amp temperature limited continuous rating.
My  current  ESC can only pull 24 amps, 12 per motor, and is powerful enough.
The Eve 40pl is gonna feed two programmable  Vescs capable.of upto 50 amps each