I’m in the process of tearing down my 5 year old soldered 12s4p 25r pack and rebuilding it based on all the new techniques I’ve seen here and on endless sphere.
Cells were stripped, cleaned of any surface rust and rewrapped in two different colors
Fish paper rings under the re-wrap and a second one stuck on top.
34 gauge (0.15mm) copper sheet
Using up fish paper scraps & wrapped with fiberglass reinforced packaging tape
0.15mm nickel plated steel on top of 0.15mm copper. KWeld 100j @ 1650A. I tried using pure nickel strips on top of the copper, but couldn’t get a good bond on the test cells.
Negative side
Rounded corners, and cut nickel strips to size & rounded
Eventual pack layout
Copper folded
Next step will be to solder 2x10awg silicone wires for each of the series connections directly onto the copper sheet.
