🔋 Baseline for HV Battery SoH Performance (Battery Degradation Data by Taycan Owners)

[ciaranob]

Yeah, pick what you want as it's just a sort of approval to use my data, it's a Turbo S indeed. ?
Note that my SoH is calculated more accurately since I've started to charge to 100%, it probably was >91,44% all before. ?

Got it - we prob need more info to equally validate other readers so I perhaps we just leave it there (Dee 85) as it was presumably still a legit reading albeit from an older OBDII, right?

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[ciaranob]

When I receive new data pt. forward I'll just update the graph in Post #1

Looks like it's too much of a chore to get your guys to read your receipts !! - that DC kWh looking kind of sad.

@Dee - I haven't done so yet (and can do), but as you (correct me if I'm wrong) already pinged the developer of the Car Scanner App, any chance he'd be receptive to adding an output of kWh from DC charging - maybe total charging hours + DC charging in respect added kWh - metric has to be in there and fairly certain dealership techs with PIWIS can prob extract that. Would be a nice stat to have vs manually trolling through receipts.

 

[Dee]

still a legit reading albeit from an older OBDII, right?

OBD protocol is no subject to change so yes.

any chance he'd be receptive to adding an output of kWh from DC charging

I don't know but you can always ask him. ?
I doubt if this value is stored in the BMS and if it has a sensor of that kind and of that specific nature.

 

[ciaranob]

OBD protocol is no subject to change so yes.


I don't know but you can always ask him. ?
I doubt if this value is stored in the BMS and if it has a sensor of that kind and of that specific nature.

I will - in regards kWh of DC vs AC charge, I was imagining some simple combination of charge history (through direct or indirect measure) could surely be deducted once we have that data - just seems like a very std metric to have.

 

[ciaranob]

Here's a fun little chart - was bored so went through my iPhone pics of me recording max predicted range in Normal and Range modes - can't say that every entry is with AC off but fairly sure correct for most. Can see the wide scatter and poor R2 trend early on in the predictions in Normal mode and how they stabilize up to present day. Max Range mode predictions more consistent (but with less data) and a very high R2 value for the logarithmic curve fit. Minor hiccup at uPdate day but back on course a week later - however will collect some more data to see if range improves at all pt. forward.

So again these values of course are the PCM's predictions of 'potential' range - most are also based of an 85% charge with a calculated 100% charge max. range for each mode.

 

[ciaranob]

I posted these data in a thread on the uPdate but thought I'd re-post here as perhaps of interest:

"OK - in respect kWh/mi as the MyPorsche and App report, here are some ways I can plot the basic trip data for the history of my car - again I don't see any change whatsoever after the update in respect range benefits/improvement and again, not a big deal for me.

What is perhaps interesting (although not exactly a new observation!!) is that despite some very cold to freezing weather in the 1st qtr. of 2022 in Houston (not sustained for very long), weather has little to no impact in this part of the world other than almost being a constant in respect battery performance impact (relative to the impact of sustained cold winters further north/elsehwere). My trip efficiency data rather emphasize driving dynamics (speed, tires, A/C, driving style etc) with a slightly lesser impact in respect time/distance."

 

[xy911jk]

EDIT - I WILL UPDAT ETHE CHART HERE AS MORE DATA IS ADDED VS CONSTANTLY REPOSTING BELOW.


View attachment 43842


So at a minimum say share:

1) Delivery Soh - suspect very few if any actually have this?
2) Current SoH
3) Current mileage
4) kWh DC charging (assume remainder at home or work/destination EVSE) - see #3 below on how to obtain.
5) Build date (or just MY if you're not sure)


Could add # times charged to 100%, how often charge dropped below 20 or 10%, and more but asking a lot already!

Hi, I am adding my data in case you are still working on this. Could be of interest bc my data points are very close to delivery date (Oct 28, with caveat at point 5 below)

1) Delivery Soh: unknown
2) Current SoH: 98.93%
3) Current mileage: 609 (980km)
4) kWh DC charging: zero (home only so far)
5) Build date: July 15 2022 (then sitting idle at 40% soc until delivery on Oct 28, waiting for 12v battery)

PS: measured with Car Scanner via OBDLink CX

 

[ciaranob]

Hi, I am adding my data in case you are still working on this. Could be of interest bc my data points are very close to delivery date (Oct 28, with caveat at point 5 below)

1) Delivery Soh: unknown
2) Current SoH: 98.93%
3) Current mileage: 609 (980km)
4) kWh DC charging: zero (home only so far)
5) Build date: July 15 2022 (then sitting idle at 40% soc until delivery on Oct 28, waiting for 12v battery)

PS: measured with Car Scanner via OBDLink CX

Will update when I get home - thx for sharing.

EDIT: Updated here: #1

 

[ciaranob]

Another user/data pt. added - see first post.

 

[rs38]

my SoH is jumping around between 92,x and 94,x%

Summer:

1) Delivery Soh: unknown (most are 99,2% I guess)
2) Current SoH: 94.3%
3) Current mileage: 22000km
4) kWh DC charging: 50%
5) Build date: Dez 2020

nearly Winter:

1) Delivery Soh: unknown (most are 99,2% I guess)
2) Current SoH: 92.3%
3) Current mileage: 24000km
4) kWh DC charging: 50%
5) Build date: Dez 2020

the amount of DC can be quite good estimated by checking the "energy turnover total kwh" (strange naming I know) in Carscanner. This is the (I am 99% sure) AC charged amount, compare it with estimated consumption car milage x avg. comsumption and you get the ratio.

 

[ciaranob]

rs38

Great data and yes indeed and why I suspect better to define a performance envelope (I just sketched this but should calculate) - still puts that Kreutel Turbo car's SoH performance a bit out there

 

[ciaranob]

rs38

Great data and yes indeed and why I suspect better to define a performance envelope (I just sketched this but should calculate) - still puts that Kreutel Turbo car's SoH performance a bit out there

Added your winter-summer data to the chart - see first post: #1

 

[rs38]

the amount of DC can be quite good estimated by checking the "energy turnover total kwh" (strange naming I know) in Carscanner. This is the (I am 99% sure) AC charged amount, compare it with estimated consumption car milage x avg. comsumption and you get the ratio.

probably the "energy turnover total kWh" number is 10x to high. Tried to get it corrected several times by asking the Carscanner author, but no chance. May be one of you can try?!

only my gut feeling: SoH is showing worse numbers if you don't charge to 100% from time to time.

 

[ciaranob]

probably the "energy turnover total kWh" number is 10x to high. Tried to get it corrected several times by asking the Carscanner author, but no chance. May be one of you can try?!

only my gut feeling: SoH is showing worse numbers if you don't charge to 100% from time to time.

.... and perhaps also if not letting it run down to 10% or less? I've only charged to 100% perhaps 3-4 times and always prior to long trips but at least that much.

 

[rs38]

try it if you can. ?

I guess the BMS is counting coulombs as well as checking some voltage limits and learnings high as low.
and in case of doubt even PIWIS will some how trigger a bigger discharge like from 100% down to <5% without charging in between.

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