Is this normal for cells?

[Kainlow]

Hi @Kainlow ,

Thanks for sharing! The two “Target Torque” values represent the front and rear motors. Under more load, you should see both values change.

The cell voltage deviation is crucial here—the lower the deviation between cells, the better. A higher deviation can indicate that something isn’t quite right with one or more cells, affecting overall health and performance.

To improve the accuracy of your readings, you might want to recalibrate, as described here: https://www.taycanforum.com/forum/threads/how-to-recalibrate-your-soh.21096/

After that you might measure again.

Hope this helps!

Thanks Svenson. Thats what I assumed, but even when I floor the accelerator the value for the second Target Torque stays at 0. I Will try again at lunch. The App is great so far. Two more questions for you - is there a way to change torque units to lb/ft? And what would be a good resource to find out what the error codes are that are showing up?

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[Sace]

Because they are trying to find cell imbalance of capacity (SoC), rather than voltage. That voltage difference between two cells will vary depending on the absolute SoC. So if one cell is at 30% and another at 32%, their voltage difference will be higher than if they were 60% and 62% instead. If they want to trigger balancing on SoC, they'd need to trigger balancing at different voltage variation at different absolute SoC. Furthermore, the voltage to SoC is continuously calibrated through the life of the car, so an older car may trigger at different voltage differences at the same SoC, whatever the computer will determine is above some mAh threshold, for the current state of the battery (age, temperature, load).

Thank you for finding the proper documentation for the Taycan! I have used the E-Tron GT SSP as a reference (Which luckily tells the exact same story). The main point being that cell balancing takes place automatically (almost) all the time and is not only happening when you do some specific sequence as many seem to believe.

It's actually pretty easy to see if you take a look at the cell voltages after a drive and then revisit after a few hours.

But the documentation also shows why it makes sense that leaving the car at a low SoC for a while is a way to trigger a warning if you have a bad cell. In this case the balancing will not have leveled out the voltages and it would be easier to hit whatever threshold (Voltage difference etc) that sets off the warning.

 

[Svenson]

Thanks Svenson. Thats what I assumed, but even when I floor the accelerator the value for the second Target Torque stays at 0. I Will try again at lunch. The App is great so far. Two more questions for you - is there a way to change torque units to lb/ft? And what would be a good resource to find out what the error codes are that are showing up?

Currently, torque cannot be displayed in lb/ft, but we'll take your feedback into account. Could you specify the error code and control unit? We'll try to look up the value on our end.

 

[Kainlow]

Currently, torque cannot be displayed in lb/ft, but we'll take your feedback into account. Could you specify the error code and control unit? We'll try to look up the value on our end.

Thanks. I am using a Vgate iCar Pro BLE4.0. These are the codes I get

 

[Svenson]

Thanks. I am using a Vgate iCar Pro BLE4.0. These are the codes I get

Hi @Kainlow,

Unfortunately, for these codes we only have the info as shown in the app. Over time, these errors may appear, but any critical issues should show up on your Taycan’s dashboard, too.

Actually, it is quite interesting that the exact same errors occurred on our vehicle, too. I've attached a screenshot for reference.

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