How to build a LiFePO4 battery

Here I am building a Lithium Iron Phosphate battery using recycled 40Ah prismatic cells in a 4S configuration for typical 12V applications.
Affiliate links:
Batteryhookup.com: Use "simplicity" for 5% off: batteryhookup.com
Vinyl press tape: www.amazon.com/dp/B07F8TZZ4N/...
Acrylic foam mounting tape: www.amazon.com/dp/B0BKZQ6CKH/...
30A Anderson connectors: powerwerx.com/anderson-1331-p...
Anderson Power Pole housings: powerwerx.com/anderson-powerp...

[@smokingsix]

I would use Copper ( Maybe Brass ) Busbars not aluminium. Altho aluminum is shiny, its got a surface layer of oxide which is hard to remove and when removed forms almost immediately. This is esp an issue for high current applications such as low voltage applications.

[@ianhoolihan2396]

Always great videos. I've seen someone else on UA-cam with an enormous lifepo4 battery bank and they had issues with the slight expansion and contraction of the cells - apparently they were pushing on each other during cycling and the rigid bus bars were getting stressed in a way that the terminal connectors themselves were failing - I'll try to find the exact video, but I'm curious if you've seen it and if you think it's actually an issue or not. I think they were trying to keep them in compression because they're supposed to last longer that way? The channel may have been off-grid garage