Like I said... I've got mixed feelings on the welded terminals, but I'm pretty sure any swelling or movement with tightly bolted terminals would put just as much stress on the cells and/or cause the fasteners to loosen up.What the hell???
Welded aluminum bus bars!
You can not disassemble the cells now.
Any swelling or movement of the cells will put stress on the batteries.
Were they laser welded?
Right now, I wish I could easily replace the one cell. But after I get the batteries finalized and in service, I probably won't ever think about or care how the bussbars are attached.
I'd be curious to see how the welding process is done. With the bussbars being 2mm thick, I don't see how a heat source applied to the top of the bussbar could melt a relatively small area of the bussbar and reliably penetrate into the top of the terminal. I wonder if maybe they use some kind of induction? Or maybe it's a resistance weld using current?