Intentional cold soak -15

[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.

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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.

 

[TMND]

Extra cold tonight

less than 1 mile per% of battery

since my fpc keeps erroring out due to the temps, she’ll be cold soaked to -32. I’ll update in the morning what it shows.

 

[PJnc284]

Woof. Too cold for my blood. I would've been packing my bags and selling the house once it got below 0.

 

[TaxmanHog]

Extra cold tonight

less than 1 mile per% of battery

since my fpc keeps erroring out due to the temps, she’ll be cold soaked to -32. I’ll update in the morning what it shows.

Wow inferred 0.6 MPK

 

[TMND]

Welp…..she was not a happy ev this morning. Started remotely and warmed up the cabin. 17% power available but only in town driving to work so not a issue. Only “trouble” I would say it had besides the obvious power and range lose was steering was a little stiff. Motor temp still an enigma to me…

 

[mr.Magoo]

Welp…..she was not a happy ev this morning.... Motor temp still an enigma to me…

Brrr !!!
You might just be the first to ever see the battery temp gauge change color (at least due to the cold).

 

[Joe.....Montana]

Good to know it still drives outside the battery temp range. The other day she sat in -7 degree (air temp) weather while I was at work. When I left battery temp was right on the lower end line. Wondered what would happen if it dipped below....glad to know it still runs!

 

[TMND]

Having a hard time taking charge at these temps. Charged for 1.5 hrs and went to check the mail. Battery was almost to the center line. Came back and plugged back in but looks like most all the energy still going to heat the pack.

8.8 charge rate, only .07 added to pack in 1.5 hrs

 

[Firn]

Having a hard time taking charge at these temps. Charged for 1.5 hrs and went to check the mail. Battery was almost to the center line. Came back and plugged back in but looks like most all the energy still going to heat the pack.

8.8 charge rate, only .07 added to pack in 1.5 hrs

My heater makes at just under 8kw so yeah, it's all going into heat

 

[TaxmanHog]

It'll be interesting to see your total gross energy consumption when it has reached 100%

With normal AC/DC conversion losses I would expect ~78 kWh, but with the initial energy going to the heater, it's going to much higher, do you have a direct energy monitor or do you use an FCSP where you can view the insights log after the charging session is completed (unplugged)?

 

[TMND]

It’ll maybe get to 100 sometime tomorrow when I’m charging lol (Prb not tho). As far as data this is as much as my power supply gives me.

 

[TMND]

Thinking on it, my biggest concern with this is the thermal cycling here. Battery experts chime in here, but wouldn’t it be better for the pack to stay at a low temp if I don’t need to charge or hit the highway rather than plug it into maintain a warm pack? Considering at nighttime, it’s going to get cold soaked either way

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