Many thanks for the explanation @barajabali and @Surfer , I had read all the topics related to this on this forum (also yours @barajabali , It was very helpful to me and searching that solder paste the epoxi appeared and I tought that that was the paste but it seems that not) Do you know any supplier in europe or spain?
http://es.farnell.com/multicore-loctite/629443/solder-wire-80-18-2-0-91mm-500g/dp/629443
This roll it has a grease or flux to solder better the alu,( is just regular flux)
The point is in one of the poles of the battery is easy to solder because is nickel but the another one is kind of aluminium and is a lot more dificult to solder with tin. Just like always try to use some sandpaper to scrach the surface and clean it, also you can use “amoniaco” if you have, i did with 80w solder. Try to use a strong enough solder because it sould be done fast to avoid the battery gets hot.
Disculpa que mi ingles es un desastre. Suerte!!
I’ve heard of people using JandB weld to HOLD connections and it works. it’s conductive but not that conductive as to be the sole connection. someone glued their copper connections with it. this stuff is likely similar
Hello @Hummie thanks for your comment, This is my first battery build so I’m gonna make a maybe really stupid question, Does the battery connectos get hot? If not, what about sticking it with hot glue or a ny other system without soldering?