chris669 said:hi, just received it. One point I do not understand with this bcb, the current can go through the xt60, that's ok, and also via the brass standoff, is this just to be able to provide the necessary Amperage? Thanks, Chris
Ok, I've seen now on the board they mention Aluminum 8mm hex M4 for 20 modules in stack. But If I dirty compare to AWG1 7.34mm is 119A, I could easy go to 30 modules (3A per board) , assuming the fact I will never exceed C1 for these cells and my inverter has a transfo that will not exceed 3000VA (230VAC for off grid household) and max power would be used for a duration of 10 minutes max. Please do not hesitate to correct me!rev0 said:chris669 said:hi, just received it. One point I do not understand with this bcb, the current can go through the xt60, that's ok, and also via the brass standoff, is this just to be able to provide the necessary Amperage? Thanks, Chris
Some users have tested the brass standoffs and found the resistance they have is negligible, and shouldn't have any issue with high current (I would still limit the PCB stacks to 10 boards or less). Initially based on some calculations of wire gauge/ampacity vs. the brass standoff cross sectional areaI thought the XT-60s would be needed to carry extra current, but the limiting factor was the cell holders (4A max), so it was not an issue. The XT-60 can still be used as a "top of stack" connector for pulling power from, if you don't want to use a screw terminal.
chris669g power from said:
not2bme said:Brass is not copper. Brass is an alloy of copper and zinc and has a much lower conductivity than copper or aluminum. You will need 3x or more brass to be equivalent to copper or aluminum. Brass is not as soft than pure copper, which is why it is used.
Copper has better conductivity than aluminum but more expensive per pound.