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I wouldn't worry about it. The car manages the temperature of the battery pack, and the battery pack has enormous thermal mass so a the difference between a 30C day and 40C day in terms of the heat that will soak into the battery isn't huge.What should max SoC be in the hot Australian summers?
Huh? The car doesn't cool the battery pack while sitting parked on a hot day. It might cool the cabin if you have that feature turned on, but not the battery. Yes, it has thermal mass, but will still heat up over the course of a 40C day (as will a 500L water tank). It doesn't take the cabin long to hit 40C in the sun even on a 30C day, (I know, because it tells me every time), and the cabin sits right on top of the battery. And that thermal mass it does have works against you keeping the battery warm into the evening.I wouldn't worry about it. The car manages the temperature of the battery pack
Yes, it has thermal mass, but will still heat up over the course of a 40C day
45C might be optimum for supercharging or high battery drain operations which requires high speed battery chemical reactions, but maybe not when battery is quiet?Isn’t the optimum temperature for the pack (at least while it is in use) something like 45°C?
Optimum for what?Isn’t the optimum temperature for the pack (at least while it is in use) something like 45°C?
The 500L tank isn't going to get to 40C though, particularly since a 40C day means the ambient air temperature might have hit that for an hour or two.Huh? The car doesn't cool the battery pack while sitting parked on a hot day. It might cool the cabin if you have that feature turned on, but not the battery. Yes, it has thermal mass, but will still heat up over the course of a 40C day (as will a 500L water tank). It doesn't take the cabin long to hit 40C in the sun even on a 30C day, (I know, because it tells me every time), and the cabin sits right on top of the battery. And that thermal mass it does have works against you keeping the battery warm into the evening.
Temps we can't change but SOC we can. How high is highLetting a battery sit at high SOC + high temp is best avoided.
Eventually the heatsoak will cause the temps to rise to an new summer equilibrium. Its a pity there is no easy way of determining the battery pack temp or voltage for that matterit'll only be absorbing heat conducted from the 40C cabin, the air around it or radiated by the surface it's parked on.
There is. Go to service mode. Select software in main menu. Hold and press Model 3/Y text/graphic. Enter service for 'password'Its a pity there is no easy way of determining the battery pack temp or voltage for that matter
Select lighting bolt, then charging. Show min and max temperature of HV battery.
Yeah, thats a lot of steps though but i get your pointGo to service mode
There are multiple battery sensors. It is the instantaneous max and min of all of the battery temperature sensors.But are they measurements (in which case, over what period of time?) or are they the minimum and maximum temperature targets the BMS seeks to achieve? It’s ambiguous…
Intuitively they would be the real time minimum and maximum temps of all the different temp sensors in the battery right now (not an average or a target).But are they measurements (in which case, over what period of time?) or are they the minimum and maximum temperature targets the BMS seeks to achieve? It’s ambiguous…