Macan 4S EV range drop

[fastiger]

My Macan 4S EV range dropped suddenly recently. It has been just over a year old and I usually charge up to 80% as recommended. It has been around 220-240 miles of range when it is charged 80%. However, it has been dropped to 190 mile range recently. Even when I drive, I recognize that the range drops faster than normal, like it drives 45 miles, but the range drops 80 miles. Has anyone experienced similar? I would like to hear before I head down to the dealer to look at.

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[Fly4ever]

My Macan 4S EV range dropped suddenly recently. It has been just over a year old and I usually charge up to 80% as recommended. It has been around 220-240 miles of range when it is charged 80%. However, it has been dropped to 190 mile range recently. Even when I drive, I recognize that the range drops faster than normal, like it drives 45 miles, but the range drops 80 miles. Has anyone experienced similar? I would like to hear before I head down to the dealer to look at.

How you determine it's an actual range drop?Did you actually drive almost the entire estimated range of 190 miles and your SoC reached as low as it gets (2-3%) and remained that way?Does the amount of power you add in a charging session coincides with what the car reports it received?And far and foremost does the SoC at any given time coincides with your kWh/100miles calculations?
There's a great chance your cells are starting to loose their balance and you must 're-educate' BMS to remember its limits from full to empty.
There's been a specific procedure for doing so and it's described extensively in this forum in several posts.Here's my input on the subject,I believe you'll find it helpful!
https://www.macanevowners.com/forum...rebalancing-after-erratic-soc-readings.25084/

 

[fastiger]

Great questions! I just read the range on the gauge and app on my phone. Both are matching and showing much lower range @ 80% than it was a month ago. Last Saturday, I drove it for 100 actual miles total. Before the journey, it showed 194 miles of range @ 80%. After driving, it showed only 70 miles range left over. (I didn't check the %.) I will dig into the subject you posted and see what I can do. Thank you so much for help!

 

[TXSchnee]

Extreme heat can have the same effect as extreme cold on an EVs range. Has it been hotter than usual where you are?

 

[oxum]

I have a similar issue since the last update was applied to my car. I suspect it won't be fixed until the next major update as it seems 100% software induced. My car range was fine and stable before the update, it could sit for weeks and SoC would not budge.

Now I already had to rebalance the battery at 100% three times in a month (which is to say charge, wait 3h, keep charging, until the SoC drops stops and car stays at 100%).

The issue is that range trends much lower, particularly once it gets below 70% SoC. The lower it goes from there, the worst the range estimate gets. Even if your trip consumption is perfect.

I am moving countries soon so I am reluctant to drop the car at the dealer as the car might end up blocked there in limbo. Not a risk i want to take, so I am dealing with it for now.

 

[Fly4ever]

@fastiger if you find behaviour similarities with mine as well as others in the related threads check your car's calculations in relation to my questions and start testing.For starters let it sit for a day or two at 20% SoC.That means you have 19kWh worth of power left in your battery.Does it remain stable?If not leave it be until it stabilises and take note the % it ends up converted into kWh of battery (1%SoC=0.95kWh).Let's say you don't have a % drain issue like many others unfortunately have and you start at 20%SoC the test.Fully charge your battery to 100% (by doing so only once will not harm your battery especially if you drive off soon after charging is done).So according to calculations you must have added 76kWh (80%) to your battery.Does the charger readings agree with that number?If your charger reports less kW delivery than your car "thought" it received (which most likely this will be te case IMHO) your're in a good path and your cells needs to be rebalanced.
Because if the car reports it received 76kWh of energy and the charger says let's say it delivered only 65 to fully charge the battery means your starting point wasn't really @20%SoC=19kWh but actually you had almost another 11kWh "hidden" in some cells.The car was reported it was @20% SoC when actually was @31~32%.

Another easy test would be to check your actual kWh/100 miles reading.Basted on that reading (which prooved to be the most accurate and worthy of depending to) take a single drive of a let's say 100 miles and compare the kWh/100 miles derived number with your % SoC departure/arrival difference.If your SoC % difference (% amount of battery used) appears to be greater than your calculated consumption according to kWh/100 miles then you will know something is out of balance in your cells and BMS in general.I used to see up to an almost 40-50% diflection between those numbers when I decided I would definitely need to re-balance my BMS and battery cells.There even were times when the kWh/100 was reporting 25kWh/100Km on the highway and for a 180Km trip the % SoC was reporting I used 80% of my battery = 76kWh used when I actually used only 25 X 1.8 = 45kWh!
Feel free to ask if you need something more and tell us how it went and what your findings were.It would be very helpful to others facing similar issues.

 

[fastiger]

Extreme heat can have the same effect as extreme cold on an EVs range. Has it been hotter than usual where you are?

Not really. I am in north Texas and as you can imagine, it is always hot. However, there was no significant tempt change recently. So, I guess it is not because of the unusual high temp.

 

[fastiger]

@fastiger if you find behaviour similarities with mine as well as others in the related threads check your car's calculations in relation to my questions and start testing.For starters let it sit for a day or two at 20% SoC.That means you have 19kWh worth of power left in your battery.Does it remain stable?If not leave it be until it stabilises and take note the % it ends up converted into kWh of battery (1%SoC=0.95kWh).Let's say you don't have a % drain issue like many others unfortunately have and you start at 20%SoC the test.Fully charge your battery to 100% (by doing so only once will not harm your battery especially if you drive off soon after charging is done).So according to calculations you must have added 76kWh (80%) to your battery.Does the charger readings agree with that number?If your charger reports less kW delivery than your car "thought" it received (which most likely this will be te case IMHO) your're in a good path and your cells needs to be rebalanced.
Because if the car reports it received 76kWh of energy and the charger says let's say it delivered only 65 to fully charge the battery means your starting point wasn't really @20%SoC=19kWh but actually you had almost another 11kWh "hidden" in some cells.The car was reported it was @20% SoC when actually was @31~32%.

Another easy test would be to check your actual kWh/100 miles reading.Basted on that reading (which prooved to be the most accurate and worthy of depending to) take a single drive of a let's say 100 miles and compare the kWh/100 miles derived number with your % SoC departure/arrival difference.If your SoC % difference (% amount of battery used) appears to be greater than your calculated consumption according to kWh/100 miles then you will know something is out of balance in your cells and BMS in general.I used to see up to an almost 40-50% diflection between those numbers when I decided I would definitely need to re-balance my BMS and battery cells.There even were times when the kWh/100 was reporting 25kWh/100Km on the highway and for a 180Km trip the % SoC was reporting I used 80% of my battery = 76kWh used when I actually used only 25 X 1.8 = 45kWh!
Feel free to ask if you need something more and tell us how it went and what your findings were.It would be very helpful to others facing similar issues.

Fly4ever, Thank you so much for the detailed directions of the tests that I can try. Let me play with it over the weekend as you mentioned. I will absolutely report back how it goes!

 

[craz8]

wait 3h

Why did you pick 3 hours? The Taycan instructions say 6.5 hours, and the very recently issued Cayenne uses 1 hour. I’ve never seen 3 hours mentioned, and I’ve always used the longer time, preferably overnight to give it enough time for the balancing process to do its work

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