OTA Update - WTD4 - Battery monitoring

[Augard]

Hi, Yesterday I received for my J1.1 2023 ST GTS new OTA update improving abnormalities detection in high voltage battery. I din't find any mention of it, probably another one with no visible change for the car.

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[GreenHornet]

I got the same today on my 2022 ST GTS.

 

[TaYcanAficionado]

Got mine today too. No visible difference - I guess it is a deeper battery analysis software, checking even slight millivolt differences across cells

 

[Paul Fireblade]

I got my update today, it would be good if this addressed the concerns @ct14garage raised regarding battery monitoring safety concerns.

 

[Paul Fireblade]

There is a TIB from Porsche on another thread WSH4 from America which sounds identical, I wonder if the number change (WSH4 to WTD4) indicates a Region change for the same issue.

I could be wrong but there is an interesting paragraph that says:
The vehicles affected by this campaign were built or repaired using a high-voltage battery that was manufactured after the date of use ("clean date") of the optimized high-voltage batteries. Therefore, these vehicles are not covered by the recall campaigns ARB6 or ARB7.

Interesting? See attached.

 

[gnr3312]

There is a TIB from Porsche on another thread WSH4 from America which sounds identical, I wonder if the number change (WSH4 to WTD4) indicates a Region change for the same issue.

I could be wrong but there is an interesting paragraph that says:
The vehicles affected by this campaign were built or repaired using a high-voltage battery that was manufactured after the date of use ("clean date") of the optimized high-voltage batteries. Therefore, these vehicles are not covered by the recall campaigns ARB6 or ARB7.

Interesting? See attached.

Need someone with a PPN to give us the VIN list

 

[TaYcanAficionado]

I'm not sure WTD4 is the same as WSH4, but can't be certain. It's interesting though that this note acknowledges that the battery is different accross cars within the same J1.1 generation. I always had the impression that all J1.1 cars have the same spec battery.

 

[chun]

I'm not sure WTD4 is the same as WSH4, but can't be certain. It's interesting though that this note acknowledges that the battery is different accross cars within the same J1.1 generation. I always had the impression that all J1.1 cars have the same spec battery.

No. 2020 have a different chemistry. In 2021 they changed the chemistry. Then in Q4 2024, they updated their manufacturing procedures to address the manufacturing defects for celss produced from 2019-2024 Q3

Then j1.2 has entierly different cells, new chemistry, new manufacturing, and the battery enclosure is slightly updated also. The cells are still from LG Chem, same as previous year taycans.

My car, a 2020 turbo, has most modules from 2020, 2 modules from a 2023 car, and 1 module from after Q4 2024. So I have 3 types of cells in my battery - 2 chemistries.

Wonder if the BMS can actually differentiate them when monitoring them.

 

[TaYcanAficionado]

interesting that the taycan BMS can do that... if that's the case, I guess the modular design of the taycan (which isn't available for most electric cars manufactured after around 2023, since they are going with a non-modular cell to chassis or cell to pack design) means that once warranties are over, independent EV mechanics will be able to install new modules with newer chemistries. So, in 2031, when cells are $50/kwh, you can get a whole new 110kwh battery that will be 200 pounds lighter for like $10k installed.

 

[gnr3312]

I just got this update notification, and while it doesn’t have the same name, the description is the same. However the option to install it is grayed out. Is there a trick to do this? I have 45% battery so not sure if it requires more or to be plugged in.

 

[Tango22]

I had this notification pop up on my PCM this morning - Oct 2024 registered GTS ST J1.1

Is this the same update? I don't see any update code on the PCM, here's the description though -

 

[Augard]

I had this notification pop up on my PCM this morning - Oct 2024 registered GTS ST J1.1

Is this the same update? I don't see any update code on the PCM, here's the description though -

It's not in notification, you will see code after turning off car and opening installation details

 

[Tango22]

Ah, right - didn't realise that. Thanks!

 

[gnr3312]

It's not in notification, you will see code after turning off car and opening installation details

This is the part that is grayed out for me. Perhaps my car does not require it?

 

[tophamn]

This is the part that is grayed out for me. Perhaps my car does not require it?

Is it still grayed out when you park? Some options appear gray if you can't select them whilst driving.

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