Our customer Armin has professionally measured our 50mm² LFP connector and is more than satisfied.
Here is his conclusion:
Contact resistance of the connectors from pole to pole from 0.14 to 0.12mOhm per connector!
I have now provided the connectors with additional M3 holes for the voltage tap or JKBMS / balancer.
The contact surfaces are coated with graphite paste and assembled with 5Nm.
Previously cleaned both contact surfaces with abrasive fleece and degreased with ethanol.I measured an amazing value of less than 4mOhm on the entire pack.
That is (what I think) more than OK.If I subtract the internal resistance of 0.16mOhm measured on the cell during the first charging cycle (16S = 2.56mOhm), about 1.44mOhm remain on 15 connectors.
Only 0.095mOhm are lost per connector, which is a good improvement.
I am more than satisfied and honestly didn’t expect that.
Regards, Armin
