Battery level after setting a departure time

[OMO7]

Just wondering if this happens to anyone else. Could be the extreme cold over the past week.

My truck is set to charge to 80%. When I set a departure time and leave 10-15min later the battery drops approx 4% within the first 1-2 minutes of driving.

The truck is connected to a 240V 32A level 2 charger, but it seems like the preconditioning uses more than that which causes it to lose a certain % almost immediately.

I could probably set the target charge to 85% then when I go to use it the truck will be closer to 80%, but just wondering if this has happened to anyone else or the possible reasoning behind it.

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[TaxmanHog]

When I set a departure time and leave 10-15min later the battery drops approx 4% within the first 1-2 minutes of driving.

WHEN ..... did you INPUT the departure time, the fifteen minutes just prior to leave time, ie. like you might a remote climate start?

Or, did you set it: the day before or hours previously?

Understand that battery conditioning requires 15 to 45 minutes of process time to get the pack temperature up and mitigate the cold soaking, so in a unpredictable mode of operation you need to have a measure of predictable action, or set it for an approximate time frame a couple hours prior, once conditioned the heat energy input will persist for several hours.

 

[Ragman]

It does pull more TaxmanHog had some charts showing believe upto 18 kw simultaneously needed during conditioning cycle. At very cold we see exactly what you are seeing set at 100% and after preconditioning at 98% battery. That truck is on a 40 amp/9kw charger. As well the early % drop which I suspect is continued battery warming after disconnecting.

 

[Heliian]

Mine goes up from 80 to 81 after a precon departure time.

This all varies with temp but you need to have the vehicle plugged in and the departure time set well in advance. It could take 2 hours for the battery to come up to full operating temp. 15 minutes won't cut it.

 

[TaxmanHog]

For the hell of it, I scheduled a regular departure time session last night for this mornings local trips, mostly did this because I intend to restore the entire weeks worth of drive energy this afternoon when we're done traveling.

The actual get out of the house time is 8am

I programmed a 7:50 departure time knowing that it kicks into cabin prep five minutes prior and normally runs a full 15 minutes based on my 15 minute remote start specifications (you have choices for 5, 10 or 15 minutes, set and forget)

The pack SOC was at 50% after the end of yesterdays driving, my forced limit was 50% no charging needed or occured, nothing happened last evening when I plugged in, sensed the current SOC and clicked to standby. (I have not time constraints)

This morning the trucks BMS decide it was cold enough that it needed to start the battery prep phase at 6:59, note that only battery prep is actually occuring, this snapshot was at 7:09, warming is improving estimated miles to go

At 0745 the cabin prep has started, HVB has reached optimum efficiency, the notification says it's ready after only 5 minutes cabin prep, but I'm letting it run until 8:00

This is what Emporia recorded for energy flow, take note that the SOC hasn't gone up for the 64 minutes the session was running, the estimated range has improved to 115 miles. I used 8 kWh to warm the battery and about 2 kWh to warm the cabin.

Note 100% energy available to the motors, last night it was around 82%, SOC still at 50%

This is the evening charging session and recap of the days energy consumption.

Recap of the entire weeks energy consumption, spontaneous battery conditioning, on the plug morning remote start, and todays activities. It was an expensive week for only 65 miles of local driving. $35.68 or 54.9 cents a mile with an effective total energy MPK of 0.6 !!

Aside from doing these experiments for the benefit of science and determining total cost of drive, I don't need to do daily full pre-conditioning.

The benefit of this mornings battery preparation is that the bulk weekly charging was not impeded by a cold battery needed pre-charge conditioning, the latent heat from the morning was still in the pack, this afternoon wasn't brutally cold. The end of drive day SOC was 46%, the goal was 90%, the active charging session on Fordpass showed 56.6 kWh before it disappeared, the record rounded it to 57 kWh, noted above. The FCSP log and Emporia log were w/i 2%, conversion losses was 9%

 

[ATLJoker285]

Just wondering if this happens to anyone else. Could be the extreme cold over the past week.

My truck is set to charge to 80%. When I set a departure time and leave 10-15min later the battery drops approx 4% within the first 1-2 minutes of driving.

The truck is connected to a 240V 32A level 2 charger, but it seems like the preconditioning uses more than that which causes it to lose a certain % almost immediately.

I could probably set the target charge to 85% then when I go to use it the truck will be closer to 80%, but just wondering if this has happened to anyone else or the possible reasoning behind it.

I noticed the same thing. It normalizes 2-3% later but the first few makes you feel you're on pace to drain your battery in 15 minutes.
Sometimes I don't make it out the neighborhood before losing the 1st percentage. For comparison, in warm months here in NC I can go about 5 miles/10 minutes before losing 1%.

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