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The inner copper layers allow for the high conductivity and low temperature rise when the current flow is lateral, across the material, which the nickel and stainless steel layers increase the resistivity of the material when current is flowing vertically, as is the case with a spot welding procedure. This increase in resistance for vertical conduction allows the material to heat up when large currents are passed through it. If a large enough current is passed through it, the material will melt and successfully create a welded joint to other surfaces. In our case, these 'other surfaces' will be the 18650 cells and the nickel strips.
INSERT SPEC SHEET PDF
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Use
INSERT PICTURE OF LOCATION ON MODULE AND PLAIN PARTS
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Amount Required
show calculations
Roughly 30 square feet.
Source for Material
Direct from EMS through EMS's university program
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Water jet cutting (not laser due to potential dangers of reflection) - most of the laser cutters that we talked with did not want to cut it because of this, but a few of the manufacturers in the US that EMS have previously worked with would laser cut it for us, though the quotes received from them were on the order of $1500-$3000 - way out of our price range.
Once we get the water jet parts back, we will need to bend the voltage taps (by hand) and bend the series connection tabs using a jig to achieve a precise radius - the jig will need to bend the material further than the end angle to account for bend relaxation.