Charge Level Increasing?

[Maquis]

For the MME we have a HV Battery Calibration Procedure tutorial on the forum. Do you guys do anything like that on the Lightning?

Since the chemistry is nearly identical, I’d expect that to work on the Lightning.

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[Zprime29]

Estimating the amount of energy left in the battery is not an exact science. A jump or drop of up to 2-3% is not something I worry about. I often see a drop of 2-3% in the low 60% SoC range, something about that region the BMS struggles with. But it doesn't make a difference on how much energy I put back into the battery at the end of the day.

 

[chl]

For the MME we have a HV Battery Calibration Procedure tutorial on the forum. Do you guys do anything like that on the Lightning?

I don't think that is necessary, all it will do is maybe adjust the guess-o-meter's estimate...I think it is best to just ignore the range estimate and concentrate on the SOC kWh remaining and your mi/kWh.

It is imo putting unneeded stress on the battery to go down to 10% and up to 100%.

Stick with what works for you and the Ford recommendation of charging to 90% most of the time, only to 100% for a long trip.

 

[chl]

I don't think that is necessary, all it will do is maybe adjust the guess-o-meter's estimate...I think it is best to just ignore the range estimate and concentrate on the SOC kWh remaining and your mi/kWh.

It is imo putting unneeded stress on the battery to go down to 10% and up to 100%.

Stick with what works for you and the Ford recommendation of charging to 90% most of the time, only to 100% for a long trip.

PS: slow charging with give the BMS more time to make a better estimate, so lower the current to whatever gives you sufficient range for your use.

 

[ashadkc9]

I got antsy that something was happening with my truck, so I plugged in the scanner and watched the values. When I unplug, its 90, then I drive a few minutes and its up to 92 or 93. The "kWh remaining" stays the same, so it seems to be an algorithm thing. I did notice that my max charge kWh has risen to 136.8 from 131.2, so maybe it has something to do with that? I don't know. All I am seeing is that the computer is trying to estimate the remaining energy and isn't doing a consistent job of it.

 

[MountainAlive]

I got antsy that something was happening with my truck, so I plugged in the scanner and watched the values. When I unplug, its 90, then I drive a few minutes and its up to 92 or 93. The "kWh remaining" stays the same, so it seems to be an algorithm thing. I did notice that my max charge kWh has risen to 136.8 from 131.2, so maybe it has something to do with that? I don't know. All I am seeing is that the computer is trying to estimate the remaining energy and isn't doing a consistent job of it.

Mine did it again this morning too and it’s been consistently cold (under 30F). Parked last night at 89% and when driving a few mins this morning it was 91%.

 

[Basis0439]

I came here to make this post. In the last few months, I'd charge to 80%, and on my way up the hill out of my subdivision, I am at 82%.

I tried to calibrate my battery by fully charging to 100% and dropping it quite low, but the issue persists.

 

[DNap4]

Mine does the same thing, primarily on cold nights. Charge to 90%, bumps up to 91% or sometimes 92% when I set departure times and it preconditions.

I don’t think it’s an issue. I always thought that as the battery gets to temp from being cold, the efficiency in the cells improves leading to the marginal improvement in battery percentage that is a few kWh in %/range. In my mind harmless. Due to the amount of driving I do, I charge to 100% 1x/wk and 90% 6x/wk without issue. 4 months of owning the Lightning like that, OBDScan shows cells still at 97% from a 2022 XLT SR at over 56000 miles.

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