DCFC precondition temp

[luebri]

If you have never experienced throttled DCFC, then you haven't been monitoring with Car Scanner.

I have monitored and every session I start and hold 170 to 179kw for 5 to 10 minutes. If that is throttled then sign me up!

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[RickLightning]

I have monitored and every session I start and hold 170 to 179kw for 5 to 10 minutes. If that is throttled then sign me up!

Here's a screen from CarScanner. It shows that the HVB was just below 40 degrees at the start of the session. As the battery warms, you can see the charger power increases.

Green line is battery temp.
Blue line is charger kW.
Red line is charger amperage requested.

 

[luebri]

Here's a screen from CarScanner. It shows that the HVB was just below 40 degrees at the start of the session. As the battery warms, you can see the charger power increases.

Green line is battery temp.
Blue line is charger kW.
Red line is charger amperage requested.

Great data. I have definitely charged in colder than 40F and not had that experience. Next I do I'll give it a try at trending it.

 

[RickLightning]

Great data. I have definitely charged in colder than 40F and not had that experience. Next I do I'll give it a try at trending it.

If you open up Car Scanner, you can see the battery temp, the amperage requested, and the amperage delivered, as well as the energy going to the heater. If you turn off the heater, any energy it shows it going to the battery.

I kept losing connections as my phone battled with Android Auto, Car Scanner, and ABRP, but it was interesting to watch the temps start at say 120 or 130 something, and then as the battery warmed up the speed increased, as that graph shows.

 

[cowboys1870]

My ‘22 SR does not appear to heat the battery when routing to a DCFC via Ford Nav and Carscanner.

Temp does not rise, and coolant heater shows 0 kW.

 

[RickLightning]

My ‘22 SR does not appear to heat the battery when routing to a DCFC via Ford Nav and Carscanner.

Temp does not rise, and coolant heater shows 0 kW.

Correct. It heats when charging. 10.0.1 will fix this.

 

[luebri]

If you open up Car Scanner, you can see the battery temp, the amperage requested, and the amperage delivered, as well as the energy going to the heater. If you turn off the heater, any energy it shows it going to the battery.

I kept losing connections as my phone battled with Android Auto, Car Scanner, and ABRP, but it was interesting to watch the temps start at say 120 or 130 something, and then as the battery warmed up the speed increased, as that graph shows.

Im familiar with the various data points on Carscanner, but since I've not had a throttled session I never really looked at the HVB Temp during a session. Also, since I dont DCFC much I have not had a lot of chances.

Closest real data I have is a carscanner phone screen recording of my first Tesla charging session last April on a 50F day (Truck had been outside at work all day). Unfortunately I dont have the HVB temp data shown on the recording, but would assume it had normalized to ambient. I was up to 170kw in 30 seconds, 175kw in 60 seconds and held between 175 & 179 for 5 minutes. 170+ for 6 1/2 minutes.

Overall session was 7 minutes 20 seconds, Total 20 kwh, Avg speed 164kw.

Here is another data sample... picture of hitting at 174kw less than a minute into charge at an EA station. This was November 7th, outside temp was 21F at 9 PM after 90 minutes of interstate driving,.

That "curve" has been extremely consistent from my experience in conditions as low as 20F.

 

[Heliian]

have been led to believe that highway driving (at least in cold weather) would not increase battery temp in any matter.

Yesterday I left work it was - 9degC, battery temp gauge was near the low end of normal range, 45 minutes later at my destination, the battery was almost in the middle.

. One morning the battery was 21 degrees. After driving for 1.5 hours, it was 39.5 degrees.

Yes, as you see your battery warmed up by nearly 20 degrees. You probably would have seen an even bigger rise if you had started plugged in. That's why preconditioning is very important for range, it doesn't waste all that energy trying to heat the battery. I did a nice drive this winter about 650kms @-20degC and the battery stayed nominal between charging stops but I also started with a preconditioned battery.

The important takeaway from this is that everyone can understand that the battery temp will rise when being either charged or discharged.

 

[potato]

We had a free DCFC for a couple of months here, so I did a few charges there, many in cold weather. My 23 XLT did not do any preconditioning when routing to the charger via Ford nav. Battery temp stayed the same (well below freezing) and no noticeable increase in coolant heater power compared to normal just heating the cabin.

I never got 10.0.1 specifically. I got 10.1.0 and 10.1.1.

 

[RickLightning]

Yesterday I left work it was - 9degC, battery temp gauge was near the low end of normal range, 45 minutes later at my destination, the battery was almost in the middle.

Yes, as you see your battery warmed up by nearly 20 degrees. You probably would have seen an even bigger rise if you had started plugged in. That's why preconditioning is very important for range, it doesn't waste all that energy trying to heat the battery. I did a nice drive this winter about 650kms @-20degC and the battery stayed nominal between charging stops but I also started with a preconditioned battery.

The important takeaway from this is that everyone can understand that the battery temp will rise when being either charged or discharged.

Yes, but no.

40 isn't enough, it heats more.

When we left home, the battery was preconditioned. It was 60.8 degrees. 1:45 later, it was 48 degrees. It had to heat up to fast charge.

 

[TaxmanHog]

We had a free DCFC for a couple of months here, so I did a few charges there, many in cold weather. My 23 XLT did not do any preconditioning when routing to the charger via Ford nav. Battery temp stayed the same (well below freezing) and no noticeable increase in coolant heater power compared to normal just heating the cabin.

I never got 10.0.1 specifically. I got 10.1.0 and 10.1.1.

Agreed, maybe a typo, we have only tracked 10.1.0 and 10.1.1, of which i have received both

OTA Software Update - 10.1.0 - It's karaoke time
OTA Software Update 10.1.1 - Enhanced Connectivity and Power Management

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