Read battery temperature & voltage from different its cell/module on a Model 3 's CANBUS?

[wlee]

I found this discussion about Model S, which can read the battery's voltages and temperature from its different cells/modules using CANBUS.

Reading Battery Voltages and Temperatures via CAN on Model S

We've sold a fair number of our SavvyCAN for Tesla Model S http://store.evtv.me/proddetail.php?prod=TeslaCANKit&cat=28. But this tends to be for the real deal geeks out there that want to log off and analyze CAN message traffic primarily from the Drive Train CAN bus. However, Arthur Hebert...

teslamotorsclub.com

Can Model 3 read the data from different cells/modules?
I need these data for battery health analysis.

 

[Regaj]

Yes, the Model 3 reports individual voltage on each of its 96 cells across the CanBus.

I don't believe - I don't recollect seeing this, so could be wrong - it reports individual cell temps, though it reports minimum, maximum, and average of the population. (To be clear, it's possible the car is reporting individual cell temps, but that the developer of Scan My Tesla - the third-party app I use to monitor CanBus sensors - simply chose not to display them).

 

[jdcollins5]

Scan My Tesla on my Model 3 shows all of the individual cell voltages, temperatures and resistances, plus the min, max and average of each. You have to select the correct Item list to get all of the readings.

 

[wlee]

Now ScanMyTesla can read some data from OBD2.

Can it read voltage/current from different CELLs/MODULE? It seems only can show data as a whole battery.

 

[jdcollins5]

Now ScanMyTesla can read some data from OBD2.

Can it read voltage/current from different CELLs/MODULE? It seems only can show data as a whole battery.

There are multiple Lists to view. The one displayed is Battery. Select BMS to see individual cell values.

 

[wlee]

There are multiple Lists to view. The one displayed is Battery. Select BMS to see individual cell values.

It is very strange that BMS tab shows nothing while other tabs (Battery or ALL) can see many inputs. Please check the following video.

 

[jdcollins5]

It is very strange that BMS tab shows nothing while other tabs (Battery or ALL) can see many inputs. Please check the following video.

Your SMT screen looks different than mine. Are you using Android? I use iPhone.

 

[wlee]

Your SMT screen looks different than mine. Are you using Android? I use iPhone.

Android

 

[wlee]

Can you show us your BMS screen shot ?

 

[jdcollins5]

Can you show us your BMS screen

Correction, it only displays cell voltages.

 

[wlee]

May I confirm again you are showing the data from a Model 3?
Mine is 2020 Model 3.

 

[jdcollins5]

May I confirm again you are showing the data from a Model 3?
Mine is 2020 Model 3.

2018 Model 3

What software version and have you updated SMT app and selected after 2022.36.6? Parameter ID‘s were changed and had to be reprogrammed after 36.6.

 

[KenC]

The only difference I see between the iOS and Android version are tabbed columns, making it easier to switch quickly. iOS uses a dropdown menu.

 

[wlee]

I just want to confirm everything is ok after I update my ScanMyTesla app. It can show individual cell voltages in BMS menu, although its update rate is very low, one sample every one minute, since it has many cells need to output their voltages.