Intentional cold soak -15

[Maxx]

I am charging now at battery temp of 39.2 (ambient 17F). Coolant heater is off and no energy is going to warming battery to higher temp. So my battery does not need to be at 60F to be charged. Not sure how low it can go without heating the battery during charging. I just know during periodical battery heating process, heater shots off when battery get to 41F. It looks like after it shots off the battery temp still may go a little higher. At those temps I get 100% power.

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[TaxmanHog]

I am charging now at battery temp of 39.2 (ambient 17F). Coolant heater is off and no energy is going to warming battery to higher temp. So my battery does not need to be at 60F to be charged. Not sure how low it can go without heating the battery during charging. I just know during periodical battery heating process, heater shots off when battery get to 41F. It looks like after it shots off the battery temp still may go a little higher. At those temps I get 100% power.

See Dave's post in this thread, makes sense......
https://www.f150lightningforum.com/...ing-for-departure-by-itself.24174/post-467611

 

[Maxx]

See Dave's post in this thread, makes sense......
https://www.f150lightningforum.com/...ing-for-departure-by-itself.24174/post-467611

Thanks. Look at the images bellow. my truck was plugged in and battery was at 21F. so 25 may not be low limit for Lightning as it is for Mustang.

One more piece of Info: I just juiced up from 50% SOC to 70%. At 6.5 KW (charger was giving out 7.3 KW). At ambient temp of 16F battery temp went up 7.2 degrees. I assume at your charge rate it would heat up faster. This was from 39.2F to 46.4F. Heater was not used to warm up the battery. Just the process of charging. The other thing I noticed the delivery loss was at 10% but if I recall correctly, I was losing 7% during summer.

Also look at battery Temp and Energy at the same SOC (25 degrees at those temps and at my battery size gives 10 KWh)

This is when juicing was almost done:

This is before I went out for a ride and used up 20%.

 

[TaxmanHog]

Thursday morning low of 10°, stimulated the Lightning to run the spontaneous battery warming at
5:13 am running until it paused for 3 minutes then resumed and finished at 5:24, only 1.2 kWh of energy consumed.

15 minutes of remote start will run from 6:40 to 6:55'ish 1.9 kWh

I manually started it at 6:40 but the system decided it wanted to run for 30 minutes with one push of the button ...... this is causing issues for folks who want to do a second session or further extensions note the 7:10 ending time.

 

[marc_hanna]

How do you get this page in your FordPass app?

I don't have the "Charging" and "Cost" options, just the "Insights"

 

[TaxmanHog]

How do you get this page in your FordPass app?

I don't have the "Charging" and "Cost" options, just the "Insights"

Check to see if your phone is using accessibility enhanced display, ie. larger than standard font or higher than normal zoom, it might cause the charging & cost tabs to ~disappear~

 

[TaxmanHog]

Friday morning 1/24, no spontaneous warming of the battery. Yesterday's charging session was longer and took in a lot of energy so, heat retention might be the reason, motor energy was still at 100%

 

[mr.Magoo]

Hmm, I will need to look at mine but I would swear my truck is heating the battery to 60 during charging. Mine was near freezing when I started charging.

I'd have to look through my logs, but I do believe they apply different heating strategies depending on whether your ignition is on or off.

 

[TaxmanHog]

To go off topic for a moment, but this is where I hope to see AI implemented. We can sit here and figure out exactly how the heater strategies of the Lightning works, and that info will be lost in 3 days as the thread ages out, or gains 5 more pages. Some AI retrieval tool within the search that could summarize all the discussions would be awesome.

Sorry, dealing with AI at work. And I would love to figure out exactly how the heater works, but I know that I'll forget and then never be able to find the three posts somewhere in some thread when I need it. How bad is it for the new guys...

[/soapbox]

Until utopia use bookmarks & tags

 

[Maxx]

Hmm, I will need to look at mine but I would swear my truck is heating the battery to 60 during charging. Mine was near freezing when I started charging.

I think the act of charging heats up the battery. The faster you put electrons in (higher current) and longer you charge, the higher temp change. of course lower ambient temp would slow it down. I have not tested it in different conditions but that is my theory. In other words if I charge at 11 amp from 20% to 90%, I should see 60 degrees. You should be able to see with car scanner when the heater is heating the battery and when just charging is heating up the battery.

p.s. My previous comment was about wether battery needed to reach 60F before it starts charging. And at 40 degrees, you should not need preconditioning to charge your battery.

 

[TaxmanHog]

Saturday morning 1/25, no spontaneous warming of the battery overnight. Yesterday's charging session was short, I expected to see the pack temps drop with the 5° temperatures. I only did a round of 5% additional charging to prepare for a road trip later today and warm the cabin in preparation for breakfast run.

The 5% SOC should have taken 6.6 kWh of traction energy, Fordpass log said it only got 5 kWh, while the FCSP sai it sent 9.392 kWh and Emporia validated an actual 9.486 kWh was sent. AC/DC conversion and heating demands used 4.486 kWh.

I went out to the truck, unplugged, pushed the start button and was greeted with a slew of error codes, PPOB unavailable, reduced power alert, etc . She would NOT shift into reverse!!

I shut her down, let sit for 30 seconds, hit start, still getting errors of reduced power and no drive condition to unlock the shifter. No new updates came over the evening, still on 10.1.0 from the 16th.
Switched to plan B take the wife's ice cold ICE to breakfast, luckily her car warms up pretty quickly and the heated seats fire up fast. We enjoyed breakfast while the Mrs. peppered me with questions and what-if's about this incident. I looked at Fordpass fearing I would see a bunch of notification about the trucks limited condition, found nothing, all appeared normal, charging records are up to date, SOC is reading correctly, etc.

This...... is a good sign, I told her that these trucks sometime experience intermittent errors during startup and all that's needed is a good 15+ minutes of down time for the episode to clear.

We got home, I checked on the truck, it fired right up, no error codes on the IPC, 100% motor power, I took it for a short test ride around the neighborhood, all good, took it for a quick blast up & down I-95 all good. Parked the truck and plugged into the charger to top off the energy I just use.

I'm hoping it remains reliable the rest of the day, there are no persistent codes on the IPC, I've got a road trip to make this evening, 120 miles in frigid conditions, starting with departure timed conditioning of the pack, starting SOC will be 95%, should be at 60% at destination, then return trip home should have me at 22% projections based on a cold winter performance of 1.4 MPK

Let's see how this plays out.

 

[TaxmanHog]

The road trip last night was uneventful, no codes, wrenches or poor performance, with the well conditioned battery and cabin, the first half of the trip ran efficiently at 1.8 MPK, speeds were 65-70 mph mostly highway, as the evening concluded my ride home averaged 1.4 MPK under colder conditions 25° along the reverse route.

Round trip average 1.6 MPK

Sunday morning woke up to 30°, it got milder overnight, the battery was plenty warm enough from the charging for 4 hours to get to 90%, I didn't need the extra 5% I loaded just in case my consumption rate was below 1.4 MPK.

The charge session had typical efficiency with the heat in the pack at a perfect balance to the cold outside, while driving home I targeted a DCFC, but didn't go there to charge, just to make sure the pack temp was optimized for slow AC charging.

​

The energy spent preconditioning and spontaneous warming while staying plugged in each night is worth it if you're looking to get peak performance from the pack and motors.

On the other hand, if you are doing 10 to 20 miles daily as I typically do which don't require peak performance, letting the pack chill during the week saves the extra costs.

This week I averaged 35.3 cents a mile for 171 miles traveled, with a 1.0 MPK considering total energy consumed.

Lastly, the old truck 2012 PSD at 15 MPG with fuel costing $3.339 this week would have cost me $38.06 to drive 171 miles

 

[PJnc284]

Well I just realized how inefficient charging on level 1 in moderate cold can be. Going from 76-88% took 20 hours and used almost 30kWh according to the outlet monitor while Ford Pass only showed 15kWh. Temp was in the 30's last night but it sat unplugged for a couple days so battery was probably fairly chilled.

 

[mr.Magoo]

Well I just realized how inefficient charging on level 1 in moderate cold can be.

You're spending a lot of juice on keeping the battery warm and fuzzy.

I caught mine spontaneously warming the battery and fires up the black box at which time the battery was in the mid 40s.

 

[PJnc284]

yup. Will be glad when I'm back to my FCSP. In hindsight, I could've held off on that little bit of extra charge since I didn't need to go as far as I thought but was interesting to see just how much energy it goes to warming things up. Guess my truck needs a heated blanket.

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