Hello,
I am building huge 12S14P battery pack. To do this i have got access to professional spot welder in academic laboratory with ADP3 weld power supply (300 Joule, dual pulse, stored energy welding power) and WBT-Q03 welding head.
I am using 0.2 mm thick and 7 mm wide pure nickel strips.
I had no problem with doing series welds. Connections were nice and neatty.
https://imgur.com/Z7FQV0l[
I had problem with welding second nickel strip to do the parallel conection of the cells. I had a lot of sparks, scorched cell and almost punctured 18650 tube. I was trying to enlow current, but there was no junction.
On the image is parameters setup:
https://imgur.com/plUSEJn
The guy in laboratory who usually operate this spot welder was not able to give me good advise. He mentioned only that he had never had anything like that, he tried to weld it by himself and had the same sparks I had.
Do you have any idea what might have gone wrong?
I am building huge 12S14P battery pack. To do this i have got access to professional spot welder in academic laboratory with ADP3 weld power supply (300 Joule, dual pulse, stored energy welding power) and WBT-Q03 welding head.
I am using 0.2 mm thick and 7 mm wide pure nickel strips.
I had no problem with doing series welds. Connections were nice and neatty.
https://imgur.com/Z7FQV0l[
I had problem with welding second nickel strip to do the parallel conection of the cells. I had a lot of sparks, scorched cell and almost punctured 18650 tube. I was trying to enlow current, but there was no junction.
On the image is parameters setup:
https://imgur.com/plUSEJn
The guy in laboratory who usually operate this spot welder was not able to give me good advise. He mentioned only that he had never had anything like that, he tried to weld it by himself and had the same sparks I had.
Do you have any idea what might have gone wrong?