J1.1 Taycan High Voltage Battery Reliability Survey

[feye]

What were the 3 replacement dates?
Porsche has said the problem may affect some of the entire j1.1 production run

I think it started Feb 2023, then in Dec 2024 I finally got an entire new pack! Nothing since then, but I drive the car very very little since...

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[Dee]

Only valid conclusion is: most batteries are perfectly ok and within tolerance.
What more do you want to know?
We already knew that from the thread of Ct14garage and his software to monitor the battery.

98% of the battery read-outs were ok (∆V <0.03V and system isolation values).

If you like you can count the exact number of battery read-outs there and put that data in perspective to your own poll.
Just an idea.

 

[Caraholic]

I’m not buying the 2% from Porsche. If that’s the case why is it every time I go to my little dealer they have multiple cars waiting for replacement. Visited another dealer this week in a gen V store and was watching them replace one. The salesmen even mentioned there were another two waiting replacements after that one.

 

[chun]

I’m not buying the 2% from Porsche. If that’s the case why is it every time I go to my little dealer they have multiple cars waiting for replacement. Visited another dealer this week in a gen V store and was watching them replace one. The salesmen even mentioned there were another two waiting replacements after that one.

Same story in switzerland; every dealer I have been to does 3+ per week.
The 2% of cars affected would be just the total of cars they fix in switzerland. It's bollocks.

Maybe what they meant is an estimated 2% of all cells are affected. At 396 cells per car, and at 150.000 cars, that's 1.188.000 affected cells. Now, it's a lot more likely that one of the ~1.2mil defective cells to be in each of the cars, or at least a much higher % than 2 of the cars.

It's in their interest to keep in ambiguous and unclear.

 

[Dee]

I’m not buying the 2% from Porsche

Me neither.
Besides, I don't have enough room to park 3500 Taycans.

 

[prj]

I’m former J1.1 owner, no cells replaced.

otoh, i’m wondering if failedcharging unit might be the reason for cells failures as well?
Especially on ultra fast carging (250kw+)?

No.

 

[B61]

For three years, I was charging on AC only.
My problems started a year ago, when i started to use Ionity, approx 4 times a month.
Charging unit (22kw) was replaced twice, heater once and finally some sensor(s) somewhere on HV battery…

 

[D00notD00d]

Same story in switzerland; every dealer I have been to does 3+ per week.
The 2% of cars affected would be just the total of cars they fix in switzerland. It's bollocks.

Maybe what they meant is an estimated 2% of all cells are affected. At 396 cells per car, and at 150.000 cars, that's 1.188.000 affected cells. Now, it's a lot more likely that one of the ~1.2mil defective cells to be in each of the cars, or at least a much higher % than 2 of the cars.

It's in their interest to keep in ambiguous and unclear.

The NTHSA submission is clear

 

[prj]

For three years, I was charging on AC only.
My problems started a year ago, when i started to use Ionity, approx 4 times a month.
Charging unit (22kw) was replaced twice, heater once and finally some sensor(s) somewhere on HV battery…

As I said, nothing to do with OBC. Get the SSP for the e-tron and read it

 

[B61]

SSP?
Btw, i sold C4 J1.1, bought 4S J1.2.

 

[D00notD00d]

Only valid conclusion is: most batteries are perfectly ok and within tolerance.
What more do you want to know?
We already knew that from the thread of Ct14garage and his software to monitor the battery.

98% of the battery read-outs were ok (∆V <0.03V and system isolation values).

If you like you can count the exact number of battery read-outs there and put that data in perspective to your own poll.
Just an idea.

I’m not familiar with that tool. Does it record a summary number for all users?
Does the summary include Thailand flood damaged cars?

 

[Dee]

I’m not familiar with that tool. Does it record a summary number for all users?
Does the summary include Thailand flood damaged cars?

Your answers are in that thread.
It's about read-outs from random members and it shows most batteries are perfectly fine, about 98%.

 

[D00notD00d]

Only valid conclusion is: most batteries are perfectly ok and within tolerance.
What more do you want to know?
We already knew that from the thread of Ct14garage and his software to monitor the battery.

98% of the battery read-outs were ok (∆V <0.03V and system isolation values).

If you like you can count the exact number of battery read-outs there and put that data in perspective to your own poll.
Just an idea.

Your answers are in that thread.
It's about read-outs from random members and it shows most batteries are perfectly fine, about 98%.

The thread has 45 pages.
I lost the will after the first 4.
I don’t think there’s any doubt that most batteries are fine. How did you calculate 98%?

 

[Jasper4S]

@D00notD00d tldr; there is software from a workshop in thailand. The owner did a lot of work on damaged batteries. He created a piece of sw (free to use) to diagnose your own battery pack. I did not see a single bad battery posted in the whole thread. Few had some weird readings but were packs where modules were replaced hence the weird reading. Confirming the 2% you, @Dee and I are thinking about.

 

[chun]

@D00notD00d tldr; there is software from a workshop in thailand. The owner did a lot of work on damaged batteries. He created a piece of sw (free to use) to diagnose your own battery pack. I did not see a single bad battery posted in the whole thread. Few had some weird readings but were packs where modules were replaced hence the weird reading. Confirming the 2% you, @Dee and I are thinking about.

You are vastly over simplifying it, but sure.

A snapshot on a specific day, most of them done after a re-balance, showed the batteries of some users having decent delta of voltages between modules.

What about 3 months of use without a re-balance? What about in 1 year? My battery showed just fine in his software - after a re-balance, and 1 month later I had a module replaced.

Not to mention that the software doesn't identify if any of the cells have a torn anode, or a bent cathode or whatever, which can become an issue at any point. It only identifies if there is an issue in the present - masked by re-balancing procedure - which even CT14 says to not take as a grantee until you drive it some more and re-test it again.

Not sure how you are confirming 2% with that, i'll be honest. Maybe ask your dealer how many they do a week, and see if it still adds up to 2%

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