Welding my cells - does this copper+nickel weld look good to you?

[frk1206]

How do you guys test the strength of your welds and know if one is better than the other? Trying the sandwich method at 60J with kweld and they “look” good. Don’t come off by pulling either. So should I declare them good and move on?

 

[spinningmagnets]

Most people test on a dead cell, then try to pull the tab off with pliers. That looks as good as youre going to get. Well done.

What battery are you using? The malectrics and kWeld are precision timers, and the length of time for the welding pulse is important, but the output of the input battery is important too.

 

[frk1206]

I’m using a turnigy rapid 150c discharge lipo which a lot of folks like and is recommended by kweld for consistent welds. I did like a 100 practice tests on cells and on nickel/copper/nickel sandwiches to simulate a battery tab. They seem pretty good at 70J and pulling with pliers strips the copper which to me seems like the weld is good.

Since I can’t verify the weld - is there a way to just “look” at the weld and say whether it’s good or not? Or just hope that whatever worked in testing is going to keep working?

Thanks!

 

[tomjasz]

Most people test on a dead cell, then try to pull the tab off with pliers. That looks as good as youre going to get. Well done.

What battery are you using? The malectrics and kWeld are precision timers, and the length of time for the welding pulse is important, but the output of the input battery is important too.

I can’t seem to find any copper nickel result with the JP Welder. Anyone?