SnBGC
Well-Known Member
- First Name
- Greg
- Joined
- Apr 20, 2020
- Threads
- 46
- Messages
- 5,955
- Reaction score
- 9,749
- Location
- Phoenix
- Vehicles
- 2021 Mach-E FE, 2021 Wrangler 4xe High Altitude
- Occupation
- Manager
Heat soak is a real thing apparently.even DCFC peak current is lower than WOT, it typically runs long time (tens of minutes) comparing to seconds of WOT. the contactors and box is in an enclosed environment, heat could accumulate over time.
During the summer, I always plug in when parked. I do the thing where I lower my charge setting and open up the schedule so the vehicle won't charge the HVB but it WILL cool the battery if it gets hot.
When I park, I usually see the "It is hot out. Please plug me in" message. The vehicle usually does NOT start cooling right away. I figure that is because the battery is comfortable since it was being cooled while driving around town. But then I park it and it starts to warm up. Warmer and warmer until the A/C compressor comes on and it starts cooling the HVB. Usually takes about 15-30 minutes before it will start cooling.
I have noticed that the car will usually want to cool itself when parked after being driven. If the car just sits all day without being used, it normally doesn't want to cool itself, even in 113F. I assume the reason is because it doesn't generate heat while sitting parked. Although, it could simply be due to the car falling asleep and not realizing it is getting hot. Sometimes I walk by my car after it's been parked in the sun all day and it will start cooling but normally it doesn't do anything except sit there. Unfortunately there isn't an easy way or me to read the actual HVB temp while it's parked so all I can really do is make general observations and then speculate as to what is really happening. (hate having to do that...)
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