Weird charging behaviour

[Fizzle]

The basics:

• 2023 Premium ER AWD
• Emporia charger

Usually charge to 90% at home. Occasional charges to 100% if I have a long distance drive to make. Range at 100% in normal weather are ~475km (~295 miles).

Been seeing weird charging behaviour these last few weeks since the new app came out.

This week I needed to charge to 100% for a 400km drive up north. Plugged in overnight, woke up in the morning, and the car read 99% charge with about 430km of range. Seemed a bit low but figured it might be linked to my driving behaviour and didn’t think much else of it. Started driving and immediately the percentage started dropping- in 5 minutes it went from 99% to 93%. Range didn’t drop as the percentage dropped. Was odd. Made my drive.

Needed to charge to 100% overnight again last night for a drive today, and will be doing the same tonight. Got home today, plugged in. Charge initiated at about 9ish kw/h. Estimated time to 100% was 10:40pm tonight. Checked the app 1/2 hour ago and saw it was around 93%. All good. Check again 5 minutes later and the app now says charging is complete. Emporia app shows no charge going to car- says that the car is not accepting charge. So I go out to the car, unplug and replug. Get in, turn the accessory power on. Screen says the car is at 99% and will complete charge at 10:40pm. Emporia shows a 1.1kw/h draw. So the car is charging again even though a minute before it said it was full.

Turn car off. Come in. Two minutes later the app says the car is at 100% and the car has stopped charging again. I go back to the car and sit in it with accessory power on again and it does the same as before- says it’s at 99% and will charge to 100% by 10:40pm.

So this is super weird.

It seems like the car believes it is at 100% when it’s not…but only when the power is off.

Anyone else experience this? Any fixes? I will go to the dealer but if I can avoid it I’d like to.

Sponsored

 

[Space_Pony]

I've never seen anything like that with my 4/23 build but I believe there were some issues with the 2023.5 cars where they would continue to charge slowly after the charge was supposed to stop. What are your charge port lights doing? They should shut off when charging is complete. I believe the problem cars had charge port lights that did not turn off.

 

[Jgg181]

Yes,
I experienced the same, but my understanding is that this normal charging behaviour for the GOM.

it estimates range based on ambient temperature, driving behaviour, and battery mgmt system programming.

i just drove 2700 miles in the last q weeks, Orlando-Dallas-Austin-Orlando, and used only DC charging. My range, at full charge(and I have Extended Premium), was never more than 290.


i am now at home, charging on my Level 2, Ford portable, and charged to 100%. Range at 100% is now reading full at 306-321. Go figure.??‍

 

[Fizzle]

I've never seen anything like that with my 4/23 build but I believe there were some issues with the 2023.5 cars where they would continue to charge slowly after the charge was supposed to stop. What are your charge port lights doing? They should shut off when charging is complete. I believe the problem cars had charge port lights that did not turn off.

Lights fully off when it’s “done”.
Lights back on when I was in the car with accessory power on and it resumed charge.

 

[Fizzle]

Yes,
I experienced the same, but my understanding is that this normal charging behaviour for the GOM.

it estimates range based on ambient temperature, driving behaviour, and battery mgmt system programming.

i just drove 2700 miles in the last q weeks, Orlando-Dallas-Austin-Orlando, and used only DC charging. My range, at full charge(and I have Extended Premium), was never more than 290.


i am now at home, charging on my Level 2, Ford portable, and charged to 100%. Range at 100% is now reading full at 306-321. Go figure.??‍

Thanks.
It’s weird though because it’s the charge percentage that doesn’t seem correct- not the range. Today when I drive I’m certain it will drop 5% within 5 minutes again.

 

[Fizzle]

Thanks.
It’s weird though because it’s the charge percentage that doesn’t seem correct- not the range. Today when I drive I’m certain it will drop 5% within 5 minutes again.

Did it again.

Showing 99% this morning, 442km range

Drove about 6km, range went down 10km, but the percentage battery dropped from 99% to 93%. And that percentage drop happened in the first 5 minutes of driving. Like I could see it clicking down. It then behaved as expected from a percentage decrease perspective during the day relative to the GOM.

 

[Fizzle]

Went to dealer today.

Not super helpful.

The good news: the car isn’t throwing out faults or codes.

The other news: they told me that a potential reason I’m seeing this behaviour is because I only usually charge to 90%. Sigh. So fairly useless feedback from them.

Tried to get to 100% again tonight- here we are at 8:28pm at 94% and charging:

And here we are at 8:33pm magically at 100%:

Interestingly the car is reporting 9.4 kWh added, and Emporia is reporting 9.97 kWh….a 0.57 kWh difference….which, drumroll please, represent 5.5% of charge on a 91 kWh battery, and coincidentally the probable gap between 94% and 100%.

It seems like the car battery isn’t calibrated properly?

 

[Maquis]

Went to dealer today.

Not super helpful.

The good news: the car isn’t throwing out faults or codes.

The other news: they told me that a potential reason I’m seeing this behaviour is because I only usually charge to 90%. Sigh. So fairly useless feedback from them.

Tried to get to 100% again tonight- here we are at 8:28pm at 94% and charging:

And here we are at 8:33pm magically at 100%:

Interestingly the car is reporting 9.4 kWh added, and Emporia is reporting 9.97 kWh….a 0.57 kWh difference….which, drumroll please, represent 5.5% of charge on a 91 kWh battery, and coincidentally the probable gap between 94% and 100%.

It seems like the car battery isn’t calibrated properly?

No - the EVSE is reporting input power, FordPass, the net to the battery. The difference is charger inefficiency.

 

[HuntingPudel]

Do you ever run the battery SoC below 20%? Running the battery to a low SoC and then charging to 100% will help to put the BMS into calibration with the cells. ??

I do think your math is a little off. 0.57KWh/91KWh = 0.63% of the battery's capacity. The 0.57KWh difference is likely the conversion losses from AC to DC in the battery. The car reports what's going into the battery, where your EVSE is likely reporting the power delivered through the EVSE. ??

 

[Fizzle]

Gah! Stupid decimals!

 

[Fizzle]

Video of the phenomenon.

Very clearly the car isn’t charging to 100% despite it saying it is. Every time I charge to 100%, I get GOM number that corresponds with about 93% range as per my driving habits (about 445 km).

Within 5 minutes the percentage charge drops from 100% to 93%.

I have a 1 minute clip from my driveway where I’m stationary and the percentage drops from 99% to 96%. It dropped an additional 3% after started driving for 2 minutes as well.

Link to video:

https://jmp.sh/0lt8qrQ7


Dealer says no codes are being thrown. But this isn’t normal. It’s not charging properly AND I’m not getting the full battery capacity. Anyone have ideas how to proceed? Going in again on Saturday.

 

[Sikkun]

Video of the phenomenon.

Very clearly the car isn’t charging to 100% despite it saying it is. Every time I charge to 100%, I get GOM number that corresponds with about 93% range as per my driving habits (about 445 km).

Within 5 minutes the percentage charge drops from 100% to 93%.

I have a 1 minute clip from my driveway where I’m stationary and the percentage drops from 99% to 96%. It dropped an additional 3% after started driving for 2 minutes as well.

Link to video:

https://jmp.sh/0lt8qrQ7


Dealer says no codes are being thrown. But this isn’t normal. It’s not charging properly AND I’m not getting the full battery capacity. Anyone have ideas how to proceed? Going in again on Saturday.

Sounds like the BMS could need recalibrated. Could try running it below 20% then charge up to 100% like the ? suggested.

 

[Fizzle]

How far below 20%?
I thought that was a thing only for the lithium batteries?

 

[Tomm]

I noticed recent rapid drops in state of charge when I drive to work in the morning when charging to 90% overnight the last two weeks.
Two things going on, incredible triple digit heat, and new OTA updates (like 4) in last two weeks.
I am ignoring it right now as I do with a lot of stuff on this car. Funny stuff happens and then just goes away.

 

[Sikkun]

How far below 20%?
I thought that was a thing only for the lithium batteries?

https://www.macheforum.com/site/threads/hv-battery-calibration-procedure.23815/

Sponsored