Did I get a bad car?

[faithnomore]

Awesome & helpful community everyone!

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[ciaranob]

@faithnomore

Forgot to add that your metrics do confirm you have the battery + !

Also be aware that 'flash' Soh readouts are typically +/- 1% and known to vary as much as +/-2%.

Your last app BE readout at 80% SoC differed only by 0.7% to the calculated value above - so again well within error ranges.

 

[ciaranob]

Awesome & helpful community everyone!

Hopefully OK, I added you to the BaseLine Soh database and updated the charts - you are now the 4th Belgium contributor - would be great to get Soh updates from you at a later date/mileage.

Cheers, C.

https://www.taycanforum.com/forum/threads/baseline-for-hv-battery-soh-performance.12815/

 

[Hirschaj]

Thanks for your feedback - I'm still mostly puzzled about the kwh this app gives me - but I don't even know if the app is correct.

Just to be sure - you have a comparable range - this is also with the performance battery plus?

Correct, comparable range, 21” wheels, Cross Turismo (CT and ST body shapes are less efficient than the sedans), PB+ which is standard on the CT in the USA.

 

[ciaranob]

@faithnomore

While I'm at it - here is some more info as a 'go-by' in respect how variable the consumptive record can look like (kWh per 100 miles here) and my GoM range prediction variations which clearly are very effected by our 2-season climate here in Houston! More variation expected in proper 4 season northern Europe.

This chart uses reported kWh/100mi or energy used (Eu) in blue per recorded trip for a PB+ to calculate a predicted 100% SoC range (Rp) using both the published 83.7 kWh (green) and what is considered the actual usable capacity of 86.7 kWh (pink) i.e. of course this assumes constant level of efficient/inefficient energy draw from the battery:

So Rp = (83.7/Eu) x 100 or (86.7/Eu) x 100

e.g. an Eu of 37.7kWh would give a calculated range of 222 or 229 mile range. This is 23.6 kWh per 100 km. a 60 kWh draw would give a range of 139 miles or in metric 37.5 kWh per 100 km.

This method of calculating the range is of course biased towards extremely inefficient short trip data (based both on driving style and on my trip length-duration data). The predicted range data (Rp) calculated from the recorded per trip kWh’s used (Eu) go from as low as 70 to a high of 250 miles with the bulk of the data between 160-220 miles. The longer range predictions here (230-250 miles) are clearly tied to the 10 or so longer (over 75 miles), more efficient trips and the chart just re-emphasizes that trip length and driving style have a fundamental control on any ‘predicted’ ranges whether based on the PCM post-charging calculation or as in this case derived from kWh per trip data and remaining capacity of the available kWh of the battery’s capacity.

The bulk of the ‘predicted’ ranges here are very low but these data must again be regarded as a more pessimistic use scenario i.e. they are based on scenarios which assume I would continue to drive very short distance/duration trips at low average speeds in Normal Mode with full AC for a full 83.7 or 86.7 kWh usage. The key point here being that you should not consider short trip derived range predictions as any useful indicator of your car’s ability to do far better during long range driving.

I can fairly confidently state that in my usage case that the combination of trip length and driving style are the principle variables controlling my range predictions vs impact of weather, terrain, load etc., as I have driven the car near 100% of the time with other parameters essentially fixed - they being:

AC on full,
21” wheels with summer performance tires
Texas low relief terrain (minimal elevation gains)
40:60 time between 1 vs 2 person load
Full seasonal cycle data
etc.

Overall my driving stlye can be described as ‘inefficient’ as I drive very ‘purposefully’ (not slow!), 90% in Normal/10% in Sport mode never using Range mode, always quick from a standstill, always with AC on, trip history dominated by short trips etc.

 

[Hirschaj]

Hi,

I have taycan ST 4S with big battery since july this year. Range has always been pretty poor - but I assumed it was my driving style and the higher highway speeds when compard to the US, however, I just discovered my old bluetooth IBD scanner works on this car and I saw some things that raise some questions:


1) SoH: is at 91,69%, the car has 13000km, is 6 months old and I have treated the battery PERFECT - I can't imagine it declining this fast?
2) at the time of measuring, battery was charged to 80%, yet the battery energy is marked at 62.9 - did they sell me the wrong car? Because that would mean my battery at a 100% has a capacity of 78 - so the small battery instead of the big one ?

Oh hey, one last thing.... You want it all, but you can't have it! ?

 

[f1eng]

I used dc charging only 3 times until now?

I have used DC charging for short charges 6 times now, never from a particularly low charge and never to a high charge percentage either.
I have done 6000 miles and despite my car being in storage for 5 months during the 12V battery shortage my SOH was quite high last time I looked, so no idea what your problem is, or if it is, in fact, a problem.

 

[ciaranob]

I have used DC charging for short charges 6 times now, never from a particularly low charge and never to a high charge percentage either.
I have done 6000 miles and despite my car being in storage for 5 months during the 12V battery shortage my SOH was quite high last time I looked, so no idea what your problem is, or if it is, in fact, a problem.

Indeed no problem - explained here #15

 

[Genau]

Indeed no problem - explained here #15

@ciaranob, your extremely helpful mega-thread on this topic, now with over 600 posts, includes some discussion about bad cell maps. I and others have had an overall SoH considered low, but not low enough given the mileage to trigger Porsche warranty service, which turned out to be mostly due to a small number of bad cells that could be seen in the Car Scanner cell map. Those bad cells soon led to the dreaded red electrical system failure requiring battery replacement or rework. So I am surprised you are advising @faithnomore to exclusively look at where his overall SoH fits on your data point distributions. What if his otherwise “normal” SoH degradation is largely driven by a couple of bad cells that will soon leave him stranded as happened to me? Again, thank you for your enormous contribution to the forum on the topic of SoH. For those interested, here’s a detailed account of my experience, posted to @ciaranob ’s mega-thread.:

https://www.taycanforum.com/forum/threads/baseline-for-hv-battery-soh-performance.12815/post-279964​

 

[faithnomore]

@ciaranob, your extremely helpful mega-thread on this topic, now with over 600 posts, includes some discussion about bad cell maps. I and others have had an overall SoH considered low, but not low enough given the mileage to trigger Porsche warranty service, which turned out to be mostly due to a small number of bad cells that could be seen in the Car Scanner cell map. Those bad cells soon led to the dreaded red electrical system failure requiring battery replacement or rework. So I am surprised you are advising @faithnomore to exclusively look at where his overall SoH fits on your data point distributions. What if his otherwise “normal” SoH degradation is largely driven by a couple of bad cells that will soon leave him stranded as happened to me? Again, thank you for your enormous contribution to the forum on the topic of SoH. For those interested, here’s a detailed account of my experience, posted to @ciaranob ’s mega-thread.:

https://www.taycanforum.com/forum/threads/baseline-for-hv-battery-soh-performance.12815/post-279964​

I don't seem to have bad cells though.

 

[Genau]

I don't seem to have bad cells though.

When I reviewed your posts I didn’t see where you mentioned the results of the cell maps in the Car Scanner app. So your cells with the highest and lowest voltages very close to the average cell voltage?

 

[faithnomore]

When I reviewed your posts I didn’t see where you mentioned the results of the cell maps in the Car Scanner app. So your cells with the highest and lowest voltages very close to the average cell voltage?

I only checked after your comment - they seem almost identical to me

 

[Scandinavian]

I only checked after your comment - they seem almost identical to me

You will see the max, min and average values in CarScanner. Up in the right corner

If your values look like below, you need to start being concerned.

 

[faithnomore]

This is what I have

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