100% Battery charging not stopping even though the app says 100%

[kjlee80]

With the full battery range reduced to 276miles after 63k miles, i tried 100% batrery charging.
The battery meter shows 100% charged, but the car keeps drawing power for more than 30 minutes now.
The remaining charge time has also remained same at 30 minutes.

I called tesla service, says nothing wrong with the battery with self diagnostics and seem to have no idea.

Anyone experienced like this?
I am not sure if I should stop charging or keep going.
Mine is 2018 M3 LR, thanks.

 

[Silicon Desert]

Though you didn't say, I assume you are charging on a home charger or destination charger, and yes, I have seen that happen on rare occasions with my older MX. This shouldn't happen on a supercharger.

On another point, I hope you plan to be driving very soon instead of just letting your car sit there at 100%.

 

[kjlee80]

Yes, I will be driving in 15 mins, thanks for your concern.
I have never done 100% charge until now.

 

[kjlee80]

And yes, i am charging at home via nema 14-50.

 

[Tam]

With the full battery range reduced to 276miles after 63k miles, i tried 100% batrery charging.
The battery meter shows 100% charged, but the car keeps drawing power for more than 30 minutes now.
The remaining charge time has also remained same at 30 minutes.

I called tesla service, says nothing wrong with the battery with self diagnostics and seem to have no idea.

Anyone experienced like this?
I am not sure if I should stop charging or keep going.
Mine is 2018 M3 LR, thanks.

That's expected.

When you charge at 100%, it's a good time for the BMS (Battery Management System) to recalibrate to ensure you get 100%. The process can take a long time, like you said 30 minutes or for others, even hours. It's best to do that when you are not in a hurry, like sleeping.

 

[kjlee80]

Finally, the car stopped drawing power.
Whats the next step, computer/button wheel reset help?

 

[Tam]

Finally, the car stopped drawing power.
Whats the next step, computer/button wheel reset help?

No need to do anything. Only reset if there's a problem.

 

[18apetrella]

100% doesn't mean it's actually at 100%. It's good to let it keep charging past 100% every once in a while to help recalibrate the battery.

 

[Silicon Desert]

Finally, the car stopped drawing power.
Whats the next step, computer/button wheel reset help?

no, that won't do anything in this situation. Either let it continue for a little while of not. Nothing to fret about.

 

[Big Earl]

Finally, the car stopped drawing power.
Whats the next step, computer/button wheel reset help?

What are you hoping to accomplish? I don't see a problem with what you've described.

 

[kjlee80]

Sorry, was hoping to see increased battery range

 

[Big Earl]

Sorry, was hoping to see increased battery range

Your loss of range is typical for the fleet, with a loss of 10 - 15% over four years. My 2018 dual motor car charges to between 270 and 280 miles, depending. I've noticed that most of the degradation/aging happens in the first two years, then levels off quite a bit. I've been in this current range for nearly two years and almost 100,000 miles.

 

[KenC]

With the full battery range reduced to 276miles after 63k miles, i tried 100% batrery charging.
The battery meter shows 100% charged, but the car keeps drawing power for more than 30 minutes now.
The remaining charge time has also remained same at 30 minutes.

I called tesla service, says nothing wrong with the battery with self diagnostics and seem to have no idea.

Anyone experienced like this?
I am not sure if I should stop charging or keep going.
Mine is 2018 M3 LR, thanks.

I thought the extra time was for cell rebalancing?

 

[kjlee80]

Possibly, or for recalibration, whatever helps at this point for me.
My car kept drawing power for another hour after showing 100% charge on the app. So, hopely extra juice is calculated into range predictions.

 

[jjrandorin]

Finally, the car stopped drawing power.
Whats the next step, computer/button wheel reset help?

The only thing that should be "next" is not leaving your car at 100% charged for any real length of time. So, if you were planning on driving, go do that. If you werent planning on driving, go do it anyway, or leave on cabin overheat protection and sentry mode, turn on remote HVAC etc, till your car is down to at least 94-95%.

EDIT: I should have read further into the thread to see you already addressed that.

 

[jjrandorin]

Possibly, or for recalibration, whatever helps at this point for me.
My car kept drawing power for another hour after showing 100% charge on the app. So, hopely extra juice is calculated into range predictions.

This is 100% normal, as others have already said. It (your car) will balance cells etc. As far as "getting range back" I am not participating in that part of the discussion but you can read through the first few posts in this thread:

How I Recovered Half of my Battery's Lost Capacity

Like many others, I have been concerned with loss of 100% indicated battery range on one of my Model 3s. My P3D (build date 9/13/2018, delivery date 10/8/2018) had gotten down to 270.3 miles at 100% charge on January 20, 2020, at about 30,700 miles, which is a loss of 40.8 miles since the car...

teslamotorsclub.com

 

[kjlee80]

Wow, great post, thank you.

 

[STS-134]

With the full battery range reduced to 276miles after 63k miles, i tried 100% batrery charging.
The battery meter shows 100% charged, but the car keeps drawing power for more than 30 minutes now.
The remaining charge time has also remained same at 30 minutes.

I called tesla service, says nothing wrong with the battery with self diagnostics and seem to have no idea.

Anyone experienced like this?
I am not sure if I should stop charging or keep going.
Mine is 2018 M3 LR, thanks.

The charge rate will taper as it balances the cells. Should get down to something like 2-3A before it finally stops completely. It generally takes 40-60 minutes past the estimated time to actually hit 100%.

And then as soon as it does hit 100%, you should drive it to get down to at least 90% and preferably 80% immediately. So best time to do a 100% charge is before a road trip, using the scheduled departure setting, with the departure time set for 1 hour before your intended departure time (which in practice means it'll probably hit 100% 0-30 minutes before you actually depart).

 

[kjlee80]

Yes, I did drive away within 20 mins from the full charge and brought the charging rate to below 90%, thank you.

 

[ucmndd]

100% normal. Pun intended.