Battery Overheat During DC Fast Charging

[K6CCC]

I have seen the gauge about the normal middle lime, but no where near that much above the line this summer. During the hot summer weather, I have several times charged in 105+ temps. Several of those had the AC keeping the cabin cool and a couple did not. Almost always in those conditions I see the gauge move a little.
My truck does not have the Max Towing package and I normally drive in "normal" mode. I have observed that switching to either Sport or Tow/Haul mode helps speed up cooling it back to normal once I start driving.

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[TaxmanHog]

Thank you all for the responses. I was driving in normal mode, not towing. AC was set to 70. Temple was the first charge of the day. Fortunately, I do have the extended warranty, but I am going to contest the copay on it as they did not resolve the issue when I took it in back in June for the same issue.

Do you hear any repetitive clicking noises near the frunk??

I wonder if the diverter valve is malfunctioning or stuck in a position that's preventing the chiller from extracting heat from the coolant loop!

#17 & #24

https://www.f150lightningforum.com/...in-thermal-management-system-pictorial.34883/

 

[Joneii]

This is not just a problem with your truck. It has been happening for a while. See the discussion in this thread:

“Should my F-150 lightning battery ever be above the middle temperature mark”

I dealt with several dealerships over the course of at least a year. They changed cooling valves, my charge port, updated software, replaced a battery module or two and the problem still exists. As I am now at 111,000 miles my warranty no longer gets me free work on this problem. Therefore, I’ve now accepted that this is the new normal for my truck and I just plan on the second and third charges of the day on a road trip will be slower.

 

[GoodSam]

switching to either Sport or Tow/Haul mode helps speed up cooling it back to normal once I start driving

Was going to Sport mode also good to use before getting to the DCFC to extra cooling of the battery pack?

 

[K6CCC]

Was going to Sport mode also good to use before getting to the DCFC to extra cooling of the battery pack?

I don't have any data, but likely yes.

 

[electricpig]

This is my recollection as well. It's a sad truth that the customer has to educate the provider, but here we are.

IMHO, in many cases it's the dealer trying to double dip on warranty work. Charge.Ford.for the warranty work, charge the customer too. After all we all know how honest the vast majority of dealerships are these days.

 

[Firn]

Was going to Sport mode also good to use before getting to the DCFC to extra cooling of the battery pack?

Yes

Normal mode lets the battery get up over 100 degrees before cooling it, sport and tow both try to get the battery to the mid 80s.

It will lower your efficiency however.

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