Update SOH, SOC, Volts and Other data at 24831 Miles

[Mark Holmes]

Please see the attached pictures, but after 24831 blissful miles in my 2020 Black MG ZS EV.
SOH 94.54% and so in normal mode my estimated range has dropped by 8 miles when all mileage counters reset.
Volts 449 as expected after the BMS update
Other data details within the photos for those to see and review
The thing that I noticed whilst being fully charged is a SOC at only 92.7%; does that mean that plus the 5.46 loss mean that we only had 98.16% of capacity in use when we first got our cars…it make sense to me bust just checking. The missing 1.84% must be the buffers??
Regards

 

[JodyS21]

Good info

The SOC shown on that app is the true SOC isn't it.
I don't think the SOC changes dependant on the SOH.
I was logging my SOC after full charges and it varied between 94.0 - 92.4, no idea why it varied, wasn't anything to do with how balanced it was, must be temperature etc related.
My SOC's haven't really changed since my SOH has declined.

The SOC from the data I've got shows it is roughly to do with the overall voltage, I think the SOC maybe directly derived from the voltage once the battery hits fully charged - but following any subsequent balancing the voltage can change very slightly which is why it isn't directly proportionate to the final voltage.

I'm pretty certain - to use more percentages 99%!
That the SOH is how much actual energy it thinks it can get from a full battery, the SOC is how full the battery is. So regardless of the health of the battery, it can still be filled up the same, but the amount of energy (density?) that can be got out of it degrades and that is the SOH.

25,000 miles, about 5.5% loss, that's not too bad I'd say. It does appear that it's not linear, but does drop initially and then not so bad as more miles are put on.