spdracerut

I'm curious what is the frequency of module failures in Taycan packs? And what's the failure mode in the individual modules?

ct14

Frankly not a lot. But with 123,000 Taycans sold globally, some of them do turn out to be quite problematic.

However having a battery failure is not the norm, let alone at 17,500KM like this car. Poor customer got bad luck and got a car that is a lemon as big as a watermelon...

All we can do is try our best to offer him alternative affordable solutions to keep it in the road.

d00d

Know anyone in the US that can do PB to PB+?

ct14

Don't know anyone. But it ain't that hard. You need however PIWIS 4 (now as PIWIS 3 does not support PPN anymore) with PPN access. This is the most important and hardest part.

chral

Where did you source your replacement module from? Here in Singapore they are quoting me 2,600 USD per module which sounds ridiculous

ct14

Oh, $1,800 is the price I sell them. Obviously I source them way way cheaper as I buy in bulk. Sometimes buying 3 batteries worth of modules (100 modules in one go etc)

chral

Hmm are these the latest original batteries? I heard the latest model are 591/592J. Maybe I can get some off you

ct14

591 and 592 is just their orientation. IE:

591 + (positive) - (negative)
592 - (negative) + (positive)

I use G and H only. They are very stable.

C (which is 2020) had a lot of problems. Very unstable.

G and H are very stable.

J is the latest and there’s very little info on how good or bad they are. So of course I’m not gonna purchase 100 ****ing modules of them without knowing.

chral

I see. Thanks for the quick replies. Mine were B of which 17/33 modules have failed, so I am very interested in finding a cheaper source for these modules. If you are open to it, I was thinking I could get them through you?

ct14

LOL, B is earlier than C (B is for 2020 cars manufactured in 2019)… they have the same problems as C

I could give you a very good price for 17 of them… But how to get them to Singapore??

If you’re really interested I think the best and cheapest way for you which saves you customs is driving all the way to Bangkok, seeing the modules in person, loading them onto your car and driving them all the way back to Singapore 😅😅

chral

yup the B’s are total **** I can confirm unfortunately. Not sure how I could drive 400+ kg of battery back without getting stopped at customs either 🤣

I have told my workshop to proceed with their batteries but man this is one painful lesson.

ct14

I see you are a bit happy that it’s “only” 17 out of 33. But unless you are planning to sell the car right away so that it becomes somebody else’s problem (a common thing with Taycans)…. I would do the 33 of them right now… essentially a new battery.

It’s not gonna last long anyways. Specially if you buy new ones… you are mixing good brand new modules with old and very bad ones…. If anything you are gonna damage the new ones as well…

Do it properly and change all of them brand new….

I can bet you grab your electrical isolation meter and measure the isolation of any of the remaining 16 modules at 1000V DC… in most it’s probably <200MΩ when it should be >1.1GΩ.

in a short while the new modules you install will become like this also.

chral

no not happy at all, it is a crazy amount of money. I don’t think I can stomach replacing the whole thing.

Thanks for the advice, I will discuss with my mechanic..
We are currently replacing those that are lower than 550 mOhm @ 500V.

ct14

The battery is 613V when discharged and almost 800V when fully charged… You need to test isolation at 1000V

flygdchman

What model years had the G and H's?