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Unbalanced pairs? LoL!If properly connected, cells in parallel ALWAYS stay balanced. In nearly all of the respects which matter here, they're pretty much equivalent to a single larger cell, with a better surface/volume ratio and thus cooling ability.
Hello! Some brief comments:Rajones4 warned against subjecting cells to undue thermal stress, good advice fellows. ¿Sonic welded? WTF? Maybe you meant “spot welded”, Rajones4. That's the industry standard practice.There are other ways to interconnect batteries. One which I've succesfully used is to attach copper sheet/flattened wires over the terminals with disk shaped neodymium magnets, and affix the stuff with hot glue. If going high current, copper sheet and thick neodymium magnets are advised (higher permeance coefficient and operational temperature, magnet wise). Other possibility is to solder with low temp solders like Rose's Metal (94-98°C), Bi55.5Pb44.5 (maybe a tad high at 124°C), etc.Cheers
Unbalanced pairs? LOL!If properly connected, cells in parallel ALWAYS stay balanced. In nearly all of the respects which matter here, they're pretty much equivalent to a single larger cell, with a better surface/volume ratio and thus cooling ability.
Interesting. This has piqued my interest in this stuff. I am getting a new soldering iron, and may get to solder some 26650 cells.Was making up my mind between a Bakon 950D and a CXG DS110T, guess I'm going to lean towards the DS110T 110W unit; ought to help.
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