Baseline for HV Battery SoH Performance

[bsclywilly]

1) ?
2) 92%
3) 16k miles
4) 40% of charges on DC. A handful of times charging from 1-100%. Otherwise mostly kept around 15-70% SoC
5) November 2021 build

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[ciaranob]

1) ?
2) 92%
3) 16k miles
4) 40% of charges on DC. A handful of times charging from 1-100%. Otherwise mostly kept around 15-70% SoC
5) November 2021 build

Great stuff, thx - added to chart on page 1

 

[rs38]

several cars, also from german Taycan forum

1st line, read date of SoH

Oct 22
95,1%
24.000 km
DC ~ 35%
July 2021
----
97.79%
10700 km
???
Oct 2021
----
95,3%
13.000km
??
MJ21
-------

mid june 22:
93,1%
18.000km
???
Oct 21

same car:

july 22:
94,8%
21.000km
???
Oct 21
--------
march 21
91%
33.000km
???
10/2020
-------
june 22
87,5%
30.760 km
???
10/2020


most cars I read (>10) had between 92 and 94% with 12000-30000km and between 12 and 24 month old.

 

[ciaranob]

several cars, also from german Taycan forum

1st line, read date of SoH

Oct 22
95,1%
24.000 km
DC ~ 35%
July 2021
----
97.79%
10700 km
???
Oct 2021
----
95,3%
13.000km
??
MJ21
-------

mid june 22:
93,1%
18.000km
???
Oct 21

same car:

july 22:
94,8%
21.000km
???
Oct 21
--------
march 21
91%
33.000km
???
10/2020
-------
june 22
87,5%
30.760 km
???
10/2020


most cars I read (>10) had between 92 and 94% with 12000-30000km and between 12 and 24 month old.

Fantastic - I'll get to adding all of these to the chart.

 

[ciaranob]

Chart updated (first page) - now with 17 entries.

EDIT - some corrections made and on MY vs build date etc.

 

[xy911jk]

Chart updated (first page) - now with 17 entries.

What do you think is a reasonable period for resubmitting data for the same car?

 

[ciaranob]

What do you think is a reasonable period for resubmitting data for the same car?

I'd suggest either by mileage (perhaps every 2-3000 miles?) and/or ambient temps (seasonal jumps at min. winter-summer) - but also if there is a notable change in SoH regardless of above!

 

[rs38]

I got some more data from a factory new (not really, was waiting 2 month for the 12V) Taycan with 50km:
99,82% SoH and showing "battery energy"* of 86,5 kWh.
one(!) day later without any further driven miles SoH dropped already to 98,8%.

This is not the first indicator, that SoH is not referring to 93,7 kWh net capacity but to 86,7 kWh, which means Porsche left another 3 kWh safety margin for possible customer claims in 6 years.

would be interesting to see your readings of *[C6.HV CHRGR] Battery energy in realtion to actual Display SoC and SoH.

there is another strange reading of [19.Gate] max energy content of the traction battery
but I cannot guess what this should mean, showing 14,85 kWh in my car.

 

[ciaranob]

I got some more data from a factory new (not really, was waiting 2 month for the 12V) Taycan with 50km:
99,82% SoH and showing "battery energy"* of 86,5 kWh.
one(!) day later without any further driven miles SoH dropped already to 98,8%.

This is not the first indicator, that SoH is not referring to 93,7 kWh net capacity but to 86,7 kWh, which means Porsche left another 3 kWh safety margin for possible customer claims in 6 years.

would be interesting to see your readings of *[C6.HV CHRGR] Battery energy in realtion to actual Display SoC and SoH.

there is another strange reading of [19.Gate] max energy content of the traction battery
but I cannot guess what this should mean, showing 14,85 kWh in my car.

Interesting - and yes indeed I had referred to your point re we are reading SoH of the end-user 'usable' battery in my first post here - I guess I thought we had all more or less agreed that that is the case (no?), but nice validation with this example. I'll add to the chart.

BTW, as with your winter-summer SoH variation, I too noticed a 1+% change - unfortunately for me a decrease! I seem to be on the lower side of all readings yet with some of the lowest total mileage to date - hoping the curve flattens out quick for my battery! Does make you question a bit exactly what is being measured by the OBDII tool on each pass i.e. rather than an absolute measure of SoH there appear to be a number of variables that may be causing unrelated variations in the output calculation?

Here is a snapshot of my last reading (yesterday) - this just the default layout so possibly not what you're after - is C6 you mention above referring to cell #6 in this layout or a different output i.e. HV CHRGR presumably different? I'll have a look poss. later for that today when I get a chance.

My early Sep 2022 reading was 92.7 and this just 3 months later:

 

[ciaranob]

OK, we need a lot more contributions from our US based Taycan forum members!!

Massive bias in the data on SoH collected to date - 19 cars represented with only two of these from the US - myself and TycanCook! Northern Europe is kicking butt here

SoH plotted against model year and build date - don't have exact months for many of the German Forum and some of teh US Forum cars (hence couple of rows in data) but fairy clear trends.

 

[MartyMeatball]

What is the recommend OBDII to perform these measurements?

Thanks.

 

[ciaranob]

What is the recommend OBDII to perform these measurements?

Thanks.

I use this the ($60) Vgate vLinker MC+ Bluetooth OBD2 (iOS and Android) which is rock solid and plays well with the free (or min paid) CarScanner App:

https://www.amazon.com/dp/B088LW211V?ref_=cm_sw_r_apin_dp_7SPSNPT7DEQRDQ7PCXPG

 

[rs38]

I tested 10+ of these adapters and not a single BLE adapter, starting at $20, failed completely.
please check recommendations of the app's website.

 

[whitex]

SoH plotted against model year and build date

Are the above graphs SoH on delivery date? Or are they today? Or are they some time between build-date and today?

 

[xy911jk]

I tested 10+ of these adapters and not a single BLE adapter, starting at $20, failed completely.
please check recommendations of the app's website.

So let me ask a question (even if a bit off topic): I have an OBDLink CX (110 €). It works both with CarScanner and ABRP but when I insert it in the port while in Park I get a red message on the dashboard ("high voltage system active", or something like that). I read in another forum that this is normal. What do you think?

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