12V charged during prep for departure time?

[luckie]

Would the 12V battery likely be charged during preconditioning of big battery for departure time?

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[Teslaeata]

Only if it needs it, its charge requirements and charge cycle differ from the HVB.

You don’t need a charged LVB before you set off on your journey.

When LVB SoC drops to below one percentage, forgot what this is exactly at time of writing, car will charge it within 48hrs, if it drops to a lower percentage the exact amount also escapes me ATM, charging starts automatically.

This occurs irrespective of whether car’s plugged in to charge, is on & driving or is just parked and switched off.

It just takes care of itself, don’t worry yourself over LVB SoH, it’s fine if left alone, my experience is battery management is just fine.

Enjoy the ride ?

 

[rcechinel]

don’t worry yourself over LVB SoH, it’s fine if left alone

"Fine"

 

[luckie]

Only if it needs it, its charge requirements and charge cycle differ from the HVB.

You don’t need a charged LVB before you set off on your journey.

When LVB SoC drops to below one percentage, forgot what this is exactly at time of writing, car will charge it within 48hrs, if it drops to a lower percentage the exact amount also escapes me ATM, charging starts automatically.

This occurs irrespective of whether car’s plugged in to charge, is on & driving or is just parked and switched off.

It just takes care of itself, don’t worry yourself over LVB SoH, it’s fine if left alone, my experience is battery management is just fine.

Enjoy the ride ?

Thanks for your response.

This is perhaps categorized as a "Nerd" question. Just curious (if anyone knows) if during the perhaps hour or so of warming the big battery prior to departure time that the car would be applying current to the 12V.

I am aware that when the car is ON, and when the car is actively charging, 12V is charged, but just curious about under this circumstance. I also know that for one to set up an experiment, to go test this on their vehicle, and collect data, does take time. So if @Mach-Lee has not already done this test, nobody will be excited to do it anytime soon.

 

[Teslaeata]

Thanks for your response.

This is perhaps categorized as a "Nerd" question. Just curious (if anyone knows) if during the perhaps hour or so of warming the big battery prior to departure time that the car would be applying current to the 12V.

I am aware that when the car is ON, and when the car is actively charging, 12V is charged, but just curious about under this circumstance. I also know that for one to set up an experiment, to go test this on their vehicle, and collect data, does take time. So if @Mach-Lee has not already done this test, nobody will be excited to do it anytime soon.

Depends if the parameters are met that 12V battery required charging.

To experiment, you’d need to do it at a whole range of LVB SoC and under all sorts of other differing conditions, probably hundreds of permutations.

Suffice to say if LVB needs a charge it will get one if everything’s working as it should and parameters are met ?

 

[Mach-Lee]

Thanks for your response.

This is perhaps categorized as a "Nerd" question. Just curious (if anyone knows) if during the perhaps hour or so of warming the big battery prior to departure time that the car would be applying current to the 12V.

I am aware that when the car is ON, and when the car is actively charging, 12V is charged, but just curious about under this circumstance. I also know that for one to set up an experiment, to go test this on their vehicle, and collect data, does take time. So if @Mach-Lee has not already done this test, nobody will be excited to do it anytime soon.

During preconditioning, the DC/DC converter is turned on and providing about 13.5V continuously. So yes, that will charge the 12V battery some. But I would not recommend preconditioning just to charge the 12 V battery, because the amount of charge you can get in <1 hr is limited, and sort of a waste unless you’ll be driving it.

 

[luckie]

During preconditioning, the DC/DC converter is turned on and providing about 13.5V continuously. So yes, that will charge the 12V battery some. But I would not recommend preconditioning just to charge the 12 V battery, because the amount of charge you can get in <1 hr is limited, and sort of a waste unless you’ll be driving it.

Thanks for the response. This is very helpful.

Another tangential but related question, when an owner uses the Ford Pass app on their phone to remote start the climate in their Mach-e to preconditon/warm the passeger cabin, does the DC/DC converter turn on to support the 12V battery here too? (seems likely)

 

[Mach-Lee]

Thanks for the response. This is very helpful.

Another tangential but related question, when an owner uses the Ford Pass app on their phone to remote start the climate in their Mach-e to preconditon/warm the passeger cabin, does the DC/DC converter turn on to support the 12V battery here too? (seems likely)

Yes, because the car is on.

 

[ChasingCoral]

Thanks for the response. This is very helpful.

Another tangential but related question, when an owner uses the Ford Pass app on their phone to remote start the climate in their Mach-e to preconditon/warm the passeger cabin, does the DC/DC converter turn on to support the 12V battery here too? (seems likely)

This was discussed long ago as a way to make sure the LVB stays charged when away on a trip.

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