syseng68k
The trick is understanding the technique. Yuasa calls the electrodes "wound", yet they present as "folded".
So I repeat my question, syseng68k:
If the structure of each plate is continuous, only round (cylindrical) packing is acceptable.
"folding" a long thin structure concentrates mass under stress at each "return".
This also concentrates heat at the buildup, and traps heat at a center that could be geometrically oriented closer to the outer surface of each cell, if each cell was a cylinder, not a square (rectilinear) shape.
Seems like a major mistake, and Mr. Musk seems to agree.