Cheapest, Dumbest BMS?

[SamRich]

Just because the tubing is stronger does not make an unbraced truss as strong as a braced one.

I'm guessing the top tube to seat tube joint will go first, because it's the corner of the unbraced square with thin walled tubing on both sides.

Agreed. Not the optimal geometry, but strong enough for the application. Look at motorcycle frames, they typically have a square front end to accommodate an engine. This is pretty similar.

 

[Inwo]

INWO,
Building a pack/case for my bike with the 30 x 11ah. I ordered a 30s BMS, but it does not have balance function.
Have you found it necessary?
How would you wire the 2.7V Cap balance modules?
Could I setup 3 x 10s modules together?

Also, do you think just folding and crimping the Al tabs together be go enough?

Thanks!

What configuration? 30s 72v
I would not trust tabs with not connectors.
The super cap boards are pretty simple. The work one per cell. So any configuration should be fine.