Battery charge drop

[Aulander]

Few days ago I charged at a public charger to 90%. After unplugging the display showed 88% and driving for 100 meters the charge dropped to 85%. Yesterday night I parked the car in my garage at 90% charge, this morning it was 85%. I have no extra devices connected to the car, and it was in sleep mode at night.
Has anyone ever heard about this issue?

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[KadeBR]

Did you have you car preconditioning? I charge on lvl 1 and it's not enough power to do it so it will pull from its own battery, and it typically takes 3-4%.

 

[RickMachE]

Few days ago I charged at a public charger to 90%. After unplugging the display showed 88% and driving for 100 meters the charge dropped to 85%. Yesterday night I parked the car in my garage at 90% charge, this morning it was 85%. I have no extra devices connected to the car, and it was in sleep mode at night.
Has anyone ever heard about this issue?

Did the internal display show 90%, or did the charger?

Were you running HVAC at the time?

When you parked at 90%, what was the temperature?

When you saw 85%, was that FordPass on inside the car?

 

[MachGT]

I have definitely left the car on before. Also, a huge parasitic drain on the battery can do that too. I hooked an inverter up to the battery and ran a 300 watt appliance all night to see what would happen, and in the morning the HV battery had lost some charge.

 

[dtbaker61]

I have definitely left the car on before. Also, a huge parasitic drain on the battery can do that too. I hooked an inverter up to the battery and ran a 300 watt appliance all night to see what would happen, and in the morning the HV battery had lost some charge.

likely to be temp related.
after a DCFC in particular, you vehicle will be trying to cool the battery and connections, and consume a bit of energy if the vehicle is 'on'.

the background load on the MME system hovers around 200-250 watts with NO environmental pre-conditioning. If you add in any heating or cooling, there can be significant consumption.... but it only adds up to a few % overnight if you leave the MME 'on'.

 

[Aulander]

Did the internal display show 90%, or did the charger?

Were you running HVAC at the time?

When you parked at 90%, what was the temperature?

When you saw 85%, was that FordPass on inside the car?

1st time: Charger was 11 Kw AC
The internal display showed 90%
No HVAC
Temperature was around 20°C, 68°F
85% was on the internal display dropping just after 100 meters drive (from 90% to 88% before starting, immediately after AC unplug)

2nd time: parked in the garage, car in sleep mode, no preconditioning, charge from 90% to 85% overnight. Never happened before.

Seems very unusual, I don't know if this can depend on a software issue.

 

[hybrid2bev]

1st time: Charger was 11 Kw AC
The internal display showed 90%
No HVAC
Temperature was around 20°C, 68°F
85% was on the internal display dropping just after 100 meters drive (from 90% to 88% before starting, immediately after AC unplug)

2nd time: parked in the garage, car in sleep mode, no preconditioning, charge from 90% to 85% overnight. Never happened before.

Seems very unusual, I don't know if this can depend on a software issue.

I'm wondering if the battery management system is not calibrated. Have you tried running the battery down to around 10% or 20% and then let it AC charge all the way up to 100% (let the car decide when to stop charging at 100%)?

 

[Aulander]

I'm wondering if the battery management system is not calibrated. Have you tried running the battery down to around 10% or 20% and then let it AC charge all the way up to 100% (let the car decide when to stop charging at 100%)?

Yes I did it more times, once a week in the last months, and I have never seen a charge drop of 5% with the car parked, just 0-1% overnight.

 

[Bongjovi]

I started experiencing this a few days before my car became inoperable. It is one of the plethora of issues I cited in my lemon law filing for the vehicle.

https://www.macheforum.com/site/thr...-3-ford-to-offer-repurchase-of-vehicle.21762/

I'm interested to see if your car goes into limp mode in a few days. I hope you will keep us posted.

also, I can share my car has been at the dealership service department since 9/1 with the problem. Like many of the other problems that are coming up with the car that are going unresolved I doubt there is a fix for this.

good luck

 

[Aulander]

I started experiencing this a few days before my car became inoperable. It is one of the plethora of issues I cited in my lemon law filing for the vehicle.

I hope your problem will be solved soon and hope it will not happen to my car.
Next Friday my car will be at the dealer for an update and hope they can investigate on the issue.

 

[Bongjovi]

I hope your problem will be solved soon and hope it will not happen to my car.
Next Friday my car will be at the dealer for an update and hope they can investigate on the issue.

Honestly, I do not foresee it getting fixed.

good luck. keep us posted on your outcome

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