High Voltage Battery Recall EXPANDED - ARB6 & ARB7

[whitex]

You’ve misquoted him. He didn’t say he replaced individual cells. He said: “we take the batteries apart and replace the cells”.

Context matters. He said the above right after talking about cell balancing and how they need to be within "about a tenth of a volt". He was in fact referring to cells there, then he said they replace the cells.

I’ve seen Porsche publications refer to Battery Modules and Cell Modules, meaning the same part.

I don't doubt that. That is precisely the kind of detail that suggests to me whether the content came from a technical source, or non-technical source. Porsche technical publications clearly distinguish between cells and modules. For example:

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[WasserGKuehlt]

Context matters. He said the above right after talking about cell balancing and how they need to be within "about a tenth of a volt". He was in fact referring to cells there, then he said they replace the cells.


I don't doubt that. That is precisely the kind of detail that suggests to me whether the content came from a technical source, or non-technical source. Porsche technical publications clearly distinguish between cells and modules. For example:

I still think you’re nitpicking ?. Give the guy a break, he’s been a Master Gold Tech for 40 years. I’d allow him to work on my car, irrespective of what he says on a shooting-the-breeze podcast.

 

[whitex]

I still think you’re nitpicking ?. Give the guy a break, he’s been a Master Gold Tech for 40 years. I’d allow him to work on my car, irrespective of what he says on a shooting-the-breeze podcast.

Of course I am nit-picking. Not blaming the guy, simply stating that his statements are more general, rather then the the nitty-gritty details. I like my technical information to be precise. ?‍

 

[snstevens]

Not to throw fuel on the fire, but I seem to recall a video from a few years ago where a guy took apart a Taycan battery. As I recall, the “cell” (the long grey modules) were sealed and could only be opened destructively (I.e., they could not be reassembled). This led me to believe that only the larger modules were replaceable.

Anyone else recall this video? I can’t seem to find it.

 

[Tooney]

Not to throw fuel on the fire, but I seem to recall a video from a few years ago where a guy took apart a Taycan battery. As I recall, the “cell” (the long grey modules) were sealed and could only be opened destructively (I.e., they could not be reassembled). This led me to believe that only the larger modules were replaceable.

Anyone else recall this video? I can’t seem to find it.

Not a video, but DIY: Taycan Battery Module Replacement
Maybe this video, but the DIY thread has more details: Porsche Taycan Battery Pack Teardown

 

[Bennachie]

Modules are the metal encased parts - within that are cells

 

[Gino]

Notified by email today from NHTSA that the previous High Voltage Short Circuit issue has been expanded. This issue is associated with a fire risk. Letters are being mailed on or about 11/29/24 with a projected first quarter fix. Porsche will install advanced diagnostic software and will notify affected owners. If affected, they will advise not to charge above 80% until the battery module can be replaced. My guidance is not to charge above 80% until the car can be diagnosed (Q1 2025).

You might want to consider not charging in your garage, which has been my practice since 2021.

Porsche internal designation is recall ARB6 & ARB7.

Here is the link for the recalls, both were dated 10/01/2024:
https://www.nhtsa.gov/recalls?nhtsaId=24V731 This covers 2020-2023 Taycan

https://www.nhtsa.gov/recalls?nhtsaId=24V732 This covers 2020-2024 Taycan

It’s Christmas Eve 6am and I just tried to charge my Taycan from 5% back to 100% to recalibrate the HV Battery but when I plugged into the EA 350KW charger it initially started charging but after about 5 minutes a message on the dash “Electrical System Failure” came up. I cleared the message. Unplugged the charging cable and reconnected. It connected, initialized, showed my vehicle as authorized but then went to a screen saying reconnecting and after a minute or two it failed.
I tried this again and an again a 5 different chargers and two different stations but I could not charge at any EA station. I called EA and they tried to initiate a free session and my Taycan wouldn’t charge. I went home and plugged into my 120V charger and it cycled on and off for a minute or two and then the message on the PCM said “charging not possible”.
I hope I’m not screwed for Christmas…
I need a miracle!

 

[FlyingPoint]

It’s Christmas Eve 6am and I just tried to charge my Taycan from 5% back to 100% to recalibrate the HV Battery but when I plugged into the EA 350KW charger it initially started charging but after about 5 minutes a message on the dash “Electrical System Failure” came up. I cleared the message. Unplugged the charging cable and reconnected. It connected, initialized, showed my vehicle as authorized but then went to a screen saying reconnecting and after a minute or two it failed.
I tried this again and an again a 5 different chargers and two different stations but I could not charge at any EA station. I called EA and they tried to initiate a free session and my Taycan wouldn’t charge. I went home and plugged into my 120V charger and it cycled on and off for a minute or two and then the message on the PCM said “charging not possible”.
I hope I’m not screwed for Christmas…
I need a miracle!

Does not sound hopeful. I wonder if your attempt to recalibrate may have caused a failure of the HV battery pack?

 

[Gino]

Not sure but I had 9 miles left on the HV battery when I started charging. It was only charging at 167kw with the battery temp at 94 degrees so everything looked normal but then the “Electrical System Failure” message came on and from that point on I was done.
Luckily my dealer is open today and he has a loaner for me. Hopefully they figure it out quick. It seems like it would be a charging system failure rather than an HV battery failure.
From what I understand it is more common to have a charging system go bad than the HV battery itself to not allow charging.

 

[Tooney]

It's too late now but Porsche TSB for 'long test' of SoH (discharge, let sit, recharge, let sit, etc.) specifies using AC charger.
Attempting to "recalibrate" the HV battery by recharging with DC fast charger does not seem like a good idea.
Taycan: Tips for completing HV Battery State of Health (SoH) Test Procedure in PIWIS Tester

 

[Gino]

It's too late now but Porsche TSB for 'long test' of SoH (discharge, let sit, recharge, let sit, etc.) specifies using AC charger.
Attempting to "recalibrate" the HV battery by recharging with DC fast charger does not seem like a good idea.
Taycan: Tips for completing HV Battery State of Health (SoH) Test Procedure in PIWIS Tester

Just dropped it off at Porsche. They said it doesn’t matter when charging from less than 5% to 80% or more via AC or DC. Should be fine but they have seen this same issue where the vehicle won’t charge on AC or DC.
They feel it is likely the on board charger which has failed. Hopefully they can get it back to me next week.

 

[SergeyIndy]

^ @Gino, please do not confuse AC and DC when attempting to rebalance your battery. The procedure specifically calling for AC charging as @Tooney is pointing out and ideally at a slower pace than usual, so I do it at 8kW vs. the usual 11kW. My last rebalance gave me almost 3% of SoH back.

 

[SergeyIndy]

Just dropped it off at Porsche. They said it doesn’t matter when charging from less than 5% to 80% or more via AC or DC. Should be fine but they have seen this same issue where the vehicle won’t charge on AC or DC.
They feel it is likely the on board charger which has failed. Hopefully they can get it back to me next week.

This sounds like exactly what it is, on board charger failed when trying to charge at DC, possibly when you get the initial very high blast of power.

By any chance, is your "Battery-saving fast charging" checked or not:

 

[Scandinavian]

It's too late now but Porsche TSB for 'long test' of SoH (discharge, let sit, recharge, let sit, etc.) specifies using AC charger.
Attempting to "recalibrate" the HV battery by recharging with DC fast charger does not seem like a good idea.
Taycan: Tips for completing HV Battery State of Health (SoH) Test Procedure in PIWIS Tester

I do not think it has any relevance to the OP‘s sitauation. The car should charge just fine from 5% to 100% without any trouble at aDC charger.

It might not give any rebalance result at all , but it should not stop charging! Must be some faults now in the cars charging system .

 

[Scandinavian]

This sounds like exactly what it is, on board charger failed when trying to charge at DC, possibly when you get the initial very high blast of power.

By any chance, is your "Battery-saving fast charging" checked or not:

But 167 kW is not much. At that Soc I have seen 250 + kW.

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