Matman
New member
- Joined
- Feb 25, 2018
- Messages
- 10
Hey all,
I am on my 3rd battery back design and I think I have nailed down a very effective and economical solution for my 'bus bars' using sheet metal.
My issue is that I can't get myfuse-wiresolder joints to stick to the aluminum sheet metal because its essentially a massive heat sink.
At the very best I get a very week/dry joint that will break with very little force.
Here is what I have tried so far:
I am on my 3rd battery back design and I think I have nailed down a very effective and economical solution for my 'bus bars' using sheet metal.
My issue is that I can't get myfuse-wiresolder joints to stick to the aluminum sheet metal because its essentially a massive heat sink.
At the very best I get a very week/dry joint that will break with very little force.
Here is what I have tried so far:
- Using a good solder station and max heat ~800C
- Using lead free solder, 21 gauge
- Using a thick flat solder tip for surface contact - works really well on the 18650 cells
- Using a good rosin flux in large, small and none amounts
- Cleaning the surface area with different cleaners - alcohol, degreaser etc.
- Sanding and grinding down the sheet to roughen the surface
- Heating the surface up as much as possible with the solder tip before applying the joint
- Using all combinations of above methods
- Spot welder doesn't work because the fuse wire blows and 5A