Mach-Lee
Well-Known Member
- First Name
- Lee
- Joined
- Jul 16, 2021
- Threads
- 210
- Messages
- 7,979
- Reaction score
- 16,075
- Location
- Wisconsin
- Vehicles
- 2022 Mach-E Premium AWD
- Occupation
- Sci/Eng
A 5-10°C rise is honestly what I expected, which I agree is a little disappointing.I did some tests today. And there is indeed a preconditioning that is done.
The distances and temperatures indicated below are in KM and C since I am in Canada.
The maximum distance for the car to start warming up the battery is 30km (19 miles). As soon as I choose a DCFC within 30km, the coolant heater starts and the temperature of the coolant inlet rises.
If the DCFC is more than 30km away, nothing happens. Until on the route the DCFC is less than 30km away and at this moment the coolant heater starts.
However the battery temperature rises by only 5C (9 F). I did two tests and had the same result of a maximum increase of 5C.
But it seems to be cumulative.
First test the temperature rose from 3C (37 F) to 8C (46 F). Second test a little later, the temperature went from 6C (43 F) to 11C (52 F)....
The small rise in temperature helps the recharging speed a little, but to be really useful the temperature would really have to increase more.
Maybe that's one of the reasons why Ford hasn't published on the subject? Maybe a future update will adjust the parameters to be really efficient?
If youâre driving 75 MPH on the interstate, 30 km ahead is only going to heat the battery for 15 minutes with the reserve heat, which wonât be a big difference. Why bother?
Ford, you need to minimally double the preconditioning distance to 60 km to effect a large enough increase in battery temp to be useful! If heat reserve is low, I would start 100 km ahead! Budget 5 kWh, thatâs an acceptable range compromise.
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