The typical welded pack has two spot welds on each end of the tab. This
is the minimum you can get with a resistance welder.
I typically put four welds on each end of each tab. I do this in two
welding operations well separated in time. This lets the heat dissipate
from the first weld. This is both for current carrying ability, and for
redundancy. (The weld do not always works perfectly, so four spots is
better than two spots.)
40 amps is toward the large end, so I suggest you put four spot welds on
each end of each tab.
Bill D.
On 10/1/2020 11:02 AM, Lawrence Rhodes via EV wrote:
The question is more how many amps each pair of welds will produce. I am
welding to the interconnects between buddy pairs so I am not too worried about
ruining the cells but in how many welds to carry 40 amps and how thick and wide
my nickel strips need to be. Lawrence Rhodes
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