car scanner questions

[tfitzgex]

Silly question,.
Why is it showing HVB SOC 95% but the display is 100 and the energy is only 79.38?

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[Mach-Lee]

Silly question,.
Why is it showing HVB SOC 95% but the display is 100 and the energy is only 79.38?

Because of the charge buffer what you see on the display is not the true battery %. What you are seeing is that when the car is fully changed to 100% displayed the battery is limited to 95% by the top buffer to prevent battery degradation. The energy number is lower because the battery is cold. If you warm up the battery to 77ºF that number should increase. It also reflects any degradation you've had in your pack (max kWh possible goes down with time as the pack ages). Minimizing the time the pack is above 80% will help reduce the pack degradation, not sure if you always charge to 100% but that could be why you've lost some kWh.

 

[tfitzgex]

No I rarely charge to 100. Today was different due to needing to drive a crapton . plus I wanted to see what info I cold get from car scanner. as far as degradation I hope it hasn't dropped that much in the 38k miles I've had it. that's 9% if I'm right. It's the er battery.

 

[kltye]

I'm not sure how much Ford updated their BMS calculations for the Mach-E, but the C-Max Energi I had had horribly inaccurate ETE (Energy to Empty) calculations, so I'd take this with a pinch of salt.

 

[satchel prefect]

Silly question,.
Why is it showing HVB SOC 95% but the display is 100 and the energy is only 79.38?

Thanks for the data point! Your reading is the magenta dot, and as you can see, it fits right in with the other observations I had, and your battery appears to respond to colder temperature pretty much the same as mine does:

More info on how I got this here

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