Definitely fact. Welding in the centre of the cells can compromise the internals of some, if not all cylindrical cells. Best avoided if at all possible.
There is a graphic floating around that has been pulled from the data sheet of a particular cell that explicitly states not to weld there, and so our best practice has just kinda evolved to avoid it on all cells as a safety precaution.
Im a smidge skeptical however not at the data or annecdote meerly based on the year. Suprising to me to say the least. What makes the center different from the edge or is the morw conductivity in the center or thinner sheet?
It’s because part of the internal structure of the cell connects to the external shell at that point
the center is right where the internal weld is that connect to the cell can, its highly advise to avoid the middle 3mm diameter area when welding
@Battery_Mooch can explain better about cell internal structure
This is what i needed.makes sense no arguments, just curious.
Here are three of them, all Sony/Murata. Note that two of them have both the center and a ring further out that are “do not weld here” areas. I don’t know what’s going on where that ring is. Someone (not me) would have to tear down a cell to, hopefully, find out.
Also this
#justwerathings
I imagine there will be ones for Ramm soon enough.
Please use silicone wire… this does not look like a good idea, and with the enclosure being CF, prone to shorting
Sweet baby Jesus this battery is going to give me nightmares what the fuck is happening
Don’t get you pantries in a bunch
Plus that is just the placement. Progression, but I appreciate the concern
It’s easy to see the harsh-toned comments and get negative but rest assured, they mean it in the nicest way they can muster. Buncha cunts (cept you Linny 
)
But they have valid points and you should definitely take the braid out and go with high temp and high strand count silicone. You deserve it!
I appreciate that comment as I am not a know it all
But good at what I do… so far until I blow up my house. Muahaha 
kingpin should point away from the middle of the skateboard for RKP
