Hey guys, I don't post much, but I am always browsing the posts here on ES
I am working on a new battery project. I am spot welding copper to 21700 batteries to make a 4s13p modules.
The dimensions of this copper from the positive of cell group 1 to the negative of cell group 2 is 0.05mm thick, 25mm long, and 265mm wide.
Two layers of this 0.05 copper is being used. The total cross sectional area for the direction of current flow is 0.1mm x 265 mm = 26.5mm^2
So my Question: Is there an equation, based on the material properties, cross sectional area, and temperature that gives a relatively accurate value of current carrying capacity for cell to cell interconnects a with a certain temperature rise? I've been looking online and I don't really see anything useful. Also all the charts and table give something slightly different.
I am working on a new battery project. I am spot welding copper to 21700 batteries to make a 4s13p modules.
The dimensions of this copper from the positive of cell group 1 to the negative of cell group 2 is 0.05mm thick, 25mm long, and 265mm wide.
Two layers of this 0.05 copper is being used. The total cross sectional area for the direction of current flow is 0.1mm x 265 mm = 26.5mm^2
So my Question: Is there an equation, based on the material properties, cross sectional area, and temperature that gives a relatively accurate value of current carrying capacity for cell to cell interconnects a with a certain temperature rise? I've been looking online and I don't really see anything useful. Also all the charts and table give something slightly different.