Nickel has a 4 times higher specific resistivity than copper. This means that the power losses due to the resistance of the interconnects are increased by 4! (see http://en.wikipedia.org/wiki/Resistivity)
The 5.75" wide segments would have a resistance of around 0.1mOhm/inch, leading to a power loss of around 30W per inch at 550A. So if the total length of your interconnects would be 30", you would convert 900W into heat!
AWG 5 solid copper wire is rated for currents up to 40 - 120A (depending on specification and usage). Divide that by 4 and you should have a good estimate of the current carrying capability of your 5 mil nickel foil.
The 5.75" wide segments would have a resistance of around 0.1mOhm/inch, leading to a power loss of around 30W per inch at 550A. So if the total length of your interconnects would be 30", you would convert 900W into heat!
AWG 5 solid copper wire is rated for currents up to 40 - 120A (depending on specification and usage). Divide that by 4 and you should have a good estimate of the current carrying capability of your 5 mil nickel foil.
