Help needed for a 72v, 3000w - 20s, 12 row Battery Build

[BigMook]

I need schematics to build a 72v, 3000w battery made with 18650 battery cells. I have to make a 20s battery with 18650 cells. It will be 20 batteries per row with 12 rows or more.

I have about 400 of the 18650 batteries, the bms, nickel strips and the spot welder and the connecting plastic to form the rows without glue. Can someone help me with schematics? Or a drawing for building the battery. I have watched many YouTube Videos, but it seems they skip over a lot of the steps. I do not want to mess this up. I certainly hope someone can help me.

Regards,
BigMook

 

[fjodorlogin]

DIY Lithium Batteries: How to Build Your Own Battery Packs

By Micah Till

Maybe this could be of help?