daromer said:
No damage is allowed.
Hole=bin
Sent=bin
Why gamble. You are unsure you bin. You dont even ask.
Voltage is not an indicator of IF the cell survived.
Well, because my spot welder is not 100% consistent, I know this will always happen during welding an entire pack together, and I'll probably end up re-buying cells forever at this point. Even the cells I didn't damage can hardly be removed from the nickel without damaging them, it seems.
I kind of just wanted to try this once and I don't plan on making a hobby out of it, so I avoided buying hundreds of dollars of specialized equipment.
I'm not really sure what to do now short of just quitting while I still can. For anyone who wants to help me debug my spot welder, it's basically a foot pedal controlling a 555 timer in a pulse-shortener configuration, connected to a SSR, connected to a truck solenoid, connected to a car battery. I tuned it to turn on for the right amount of time when I press the foot pedal, and when it works it works perfectly, but then maybe 10% of the time it just makes a big spark and thesolenoid clicks 4 or more times instead of 2 like it's supposed to.
For what it's worth, I noticed that most of the time, I damaged the positive side of cells, which seems to be hollow. (I'd guess ~2mm of air underneath)Maybe it's more prone to making the spot welder act up. It also seems like not as much of an issue as damaging the negative side.Any suggestions on what to do now?