Battery connection method

[Hillhater]

If one weld is 0.167 ohm , then 10 in series would be 1.67 ohm ?
(Actually, 10s string of cells welded together would have 20 welds !…3.2 ohms )
But i just saying the stated 0.167 ohm for one weld seems v high ?
That is 2-3 times the cell IR .!

 

[ilu]

If one weld is 0.167 ohm , then 10 in series would be 1.67 ohm ?
(Actually, 10s string of cells welded together would have 20 welds !…3.2 ohms )
But i just saying the stated 0.167 ohm for one weld seems v high ?
That is 2-3 times the cell IR .!

The study that was quoted seems to be talking about micro, not milli ohms.

 

[Hillhater]

Ahh ! Thanks ..that makes sense now.
I should have read the report without the preconceved “miliohm” in my mind from the original post….

The published study “Electrical contact resistance measurements of clamped battery cell connectors for cylindrical 18650 battery cells” by
Christoph Bolsinger *, Matthias Zorn, Kai Peter Birke that appeared in the Journal of Energy Storage in April 2017 shows the following:

Average contact resistance of nickel resistance spot welded to a Panasonic 18650 with 12 spots is about 167 milliohm

Aussie78… you may want to edit that post to prevent future confusion. :wink:

 

[Aussie78]

Ahh ! Thanks ..that makes sense now.
I should have read the report without the preconceved “miliohm” in my mind from the original post….

The published study “Electrical contact resistance measurements of clamped battery cell connectors for cylindrical 18650 battery cells” by
Christoph Bolsinger *, Matthias Zorn, Kai Peter Birke that appeared in the Journal of Energy Storage in April 2017 shows the following:

Average contact resistance of nickel resistance spot welded to a Panasonic 18650 with 12 spots is about 167 milliohm

Aussie78… you may want to edit that post to prevent future confusion. :wink:

Edited. Well spotted everyone. Sorry for the confusion.