Significant drop in SoH

[Earlofsandwich]

i actually had a similar issue. I think it was due to an update that changes how the car reports the SoH. I did this 2 rounds back to back (skipping the charging to 80% in the middle) and it improved up to 90%. https://www.macheforum.com/site/threads/hv-battery-calibration-procedure.23815/

hope this helps

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[SpaceEVDriver]

Summary: The battery State of Health is reported as 92%. Depending on unknown details about the buffers Ford reserves for various reasons, I suspect this is accurate enough that if it's 95% or 90% it doesn't matter. We know that NMC battery chemistry has a steep capacity loss in the first 5-10%, and a sharp kink after that where the degradation is much slower. So I suspect we'll be at 92% for the next year or so before I see any further degradation in SoH.

Details:
I got around to running the car down to 0% and then charging to 100% without interruption.

I got home with 4% SoC and decided I wanted to bring it to 0%, so I drove around a bit with the heater and AC on. When the SoC display was 0%, I plugged in and let the car charge overnight at 48 Amps.

CarScanner claimed the battery had about 4.2 kWh with 0% SoC last night, right before I started the charge.

ChargePoint claims it delivered 93.4 kWh.
Ford Pass claims energy added was 87.3 kWh.
That's an efficiency of 93.5% energy transfer, which is about what I would expect.

If the energy transfer claims are true and the battery gained 87.3 kWh, then the total energy stored would be 87.3+4.2 kWh = 91.5 kWh, which is right near the maximum usable capacity claimed when the vehicle was sold.

What I didn't do was keep CarScanner on it all night. I wish I had because while FordPass claims the energy add was 87.3 kWh, the CarScanner information this morning indicated the battery "Energy to Empty" is 83.3 kWh. This is in part because last night's battery temperature was 19 ºC and this morning it was 16 ºC, so the battery's energy to empty declined a bit due to temperature. And there was likely some internal resistance during charging so the energy added claim by FordPass probably also includes some losses to resistive heating of the battery (not much).


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