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So it begins...... Battery spot welder
#40
Fiona's  Sapele Cormorant hunting perch is nearing the final stages.. 
   

I have larger  wider  burlier wheels with nicer hubs,  to fit the trolley, but some modifications will be required, with a few unknowns until i commit,  and bust out metal cutting wheel, and JB weld.

So that is tabled, for now.


The 38$ parts only NonOp E skateboard arrived.
I had to delve.Long story short,  One of the 7 cells is 0.025v, the other 6 were 4.00, +/- 0.002v

The Battery seemed to be well assembled.  fishpaper rings on positive terminals, fishpaoper between cells, fishtPaper doubled uo in any areas where  stress or   or  compession could damage a wire or cell interconnect niickle strip. Kapton tabe, two layers of thick heatshrink.

It was just a cell failure and the BMS, did its job.
So i took XT60 connector from battery, fed it 25v from my voltage booster, prezsed the power button and it beeped.I tur ed on the remote, fired the throttle and the wheel spun up.

The itty bitty ESC, has no additiknal heatsinking. I now  think my other 350 board is actually a dual motor esc, running onky one motor.

I also believe the motors can consume 350 watts, with a 10s battery and 36 nominal volts, 42v max.
yet they are fed by only 25.2  nominal volts, 29.4v max.
the 38$sk8 is a one piece plastic deck and molded enclosure. It can fit 10 cells, maybe even 10 21700s. inside of it.

Im kind of torn on whether i want to return it to full function or use the enclosure and soeed  ontroller to power a 300 watt thruster motor for the kayak.
THE 700 is still disassembled, victim of my other projects.

Ive got xt60, and xt 90 connectors ordered. They are universal standard in this world and are more compact and less fragile than Andersons.

I can get a 10s ESC, and run 10 cells inside this new skate. If 10 21700s fit, it will basically double the range, and likely hit higher top speeds, and have more torque too.
Too many options, but it is a great candidate for my first battery build.

the 6 remaining 2000mah  cells are likely healthier than the 3 ryobi 18650s which only once had 1500mah.

I got to see if i can find a d
atasheet for them
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RE: So it begins...... Battery spot welder - by sternwake - 11-12-2023, 05:27 PM

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