I didn’t know soldering vs welding could damage cells, thanks for that! The battery packs I’ve built are all made from cells that have threaded terminal posts, because I don’t have a laser welder (which as I understand it is the tool that gets used for this most often).
I stand by my point though, because a laser welder is not particularly expensive or exotic equipment, you can safely operate one in a garage, and you can learn to use one effectively with a little bit of practice.
Attitudes like “IT’S DANGEROUS DON’T EVEN TRY IT” are silly, and lead to people having unwarranted fear about really basic, easy-to-understand technology.
I have disassembled several. They're all welded, not soldered.
Soldering will damage the cell. Improper welding will poke holes in the cell.
It's not rocket science but as your own comment proves, basic research is required as well as some practice welding it a safe location.