Warning about using range mode, in hot weather, after DC charging 150kW+

[XLR82XS]

I mean seriously, avoiding parking in temps above 86 F? I'd be shocked if that were even possible in any of the markets where the Taycan is sold unless you somehow travel exclusively to climate controlled garages.

I live in S. Florida. Now, and all of summer the temp is almost always 86F even when it's in the garage. Plus it's sits in the sun all day at the office and cars on dealer lots bake outside all day.

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[Hirschaj]

Austin TX forecast for the next 10 days. Only another couple months of 100 degree + weather ?

 

[AnloTaycan2022]

It is pretty simple to understand. In range mode, your AC is in eco mode so not much working frankly. The same AC system is used to cool your battery. So if you have a very hot battery following a high speed DC charge, the range mode have no ability to cool back your battery. If you set yourself in "normal", the AC system will work at full force cooling your battery temp.

 

[XLR82XS]

It is pretty simple to understand. In range mode, your AC is in eco mode so not much working frankly. The same AC system is used to cool your battery. So if you have a very hot battery following a high speed DC charge, the range mode have no ability to cool back your battery. If you set yourself in "normal", the AC system will work at full force cooling your battery temp.

The battery is integrated into the vehicle's cooling circuit via a line system and a coolant pump. It can be cooled or heated so that it always operates in an ideal temperature window. The battery can also store the waste heat from the liquid-cooled high-voltage components. As a result, it serves as a thermal storage device or buffer, which permits intelligent functions such as conditioning to ensure driving performance: the target temperature of the battery is determined on the basis of the battery charge and the selected driving program. This ensures sporty driving performance and allows Launch Control to be used.

Depending on the outside temperature, the battery is preconditioned to a certain temperature level when the vehicle is connected to the mains for charging. The interior can be preconditioned independently of the mains

 

[rs38]

Range mode moves the max acceptable battery temp by 3-4C.
https://www.taycanforum.com/forum/t...-normal-sport-and-sport-plus.9881/post-142234

I didn't come across that nice drive mode diagram before, thanks!
This explains so much of what I was assuming, guessing, measuring.

If what you're saying is correct, that means any time you drive in Range Mode you risk potential additional aging, since the battery temp could always get up there. So for example driving through mountains in Range mode just as bad (uphill large power draw, downhill recuperation - both heat up the battery).

you also risk even more aging at the lower end of battery temp, if 86°F (30°C) is the optimum.
my BMS reports 94.1% state of health at 18000km and I drive a lot with range mode but nearly never with battery above 35°C. So I could assume that battery wear would be less with driving normal and sport mode in the mostly cold months?

 

[B61]

Well of the 41K odd Taycan's sold globally in 2021, roughy 9400 were sold in the US where such temps are more than common in over 2/3 of the country - so as it effects a minimum of ca. 1 in 5 Taycan's sold in the US (alone i.e. actual total should include all sold in middle eastern, Austral-asian S. American and other similarly intensely hot climate markets), then such high temps are most definitely relevant to a significant percentage of these cars. Reality is prob over 40% of all Taycan's sold will have to endure mid-80's and higher temps for sustained periods.

Agreed.
we have over 30C during summer time, even up to 40 and we are even not southern country.
i have underground gatage at work, so i don’t par on sun for hours…but in case that i’d go on a business trip, the car would be anywhere…

btw, few days ago, i came home (outside temp.29C, battery temp 32)…and after an hour, i went to visit my parents. Outside and battery temp still 29/32.
since i live on a small hill, i went down for about 3km almost “on weight“ only (with little breaking) and consumption went do to -6kwh/100km (minus six! ) later on, for the next 10km, it went up to 13kwh/100 …i’ve never noticed something like that before.

 

[batteredhaddock]

I interpret the initial statement of "The following measures can be taken to reduce battery ageing and wear" as effectively just telling people that taking those options might reduce wear by some margin, with obviously the battery warranty still applying. I mean seriously, avoiding parking in temps above 86 F? I'd be shocked if that were even possible in any of the markets where the Taycan is sold unless you somehow travel exclusively to climate controlled garages.

I think you are spot on with the just telling people what might help part. This is akin to the You-Tube “stats for nerds” and the sort of thing that the average user won’t care about. Those of us on forums like this are more likely to be into this stuff and I have no issue with the extra info. This is in the same boat as the “reduced charging rate that might extend the life of your battery” (I am using that in case it does slightly extend my battery life having the car for 4 years and frequently DC charging).

Porsche doesn’t stipulate the reduced charge rate or the range mode in their warranty. Despite TeslaBjorn kind of trying to make an issue of it then they don’t even enable the reduced charging rate by default, most people don’t even know it is there hidden away.

Finally, many of us will have cars on finance from the dealerships, likely underwritten by Porsche Finance. If Porsche had any genuine concern you could bet your bottom dollar they would be all over this and enabling reduced charge rate by default on cars likely to end up back at the dealership for sale in a few years time (along with educating on this range mode tweak, and having a battery health clause).

 

[AnloTaycan2022]

The battery is integrated into the vehicle's cooling circuit via a line system and a coolant pump. It can be cooled or heated so that it always operates in an ideal temperature window. The battery can also store the waste heat from the liquid-cooled high-voltage components. As a result, it serves as a thermal storage device or buffer, which permits intelligent functions such as conditioning to ensure driving performance: the target temperature of the battery is determined on the basis of the battery charge and the selected driving program. This ensures sporty driving performance and allows Launch Control to be used.

Depending on the outside temperature, the battery is preconditioned to a certain temperature level when the vehicle is connected to the mains for charging. The interior can be preconditioned independently of the mains

I think this image explains everything

 

[Pozuelo]

One reason that range mode is more efficient is that it closes the shutters to improve aerodynamics while sacrificing cooling. It would be simple enough for Porsche to limit range mode if cooling is required beyond certain temperatures, and simply displays a warning and delays the selection. After this delay it could inquire if range mode selection is still desired. A little common sense goes a long way. Too bad common sense is uncommon.

 

[slothinker]

That's hot. As an aside, what's the diff. between "plenty of sunshine" and "mostly sunny"? ?

 

[XLR82XS]

That's hot. As an aside, what's the diff. between "plenty of sunshine" and "mostly sunny"? ?

Mostly sunny is mostly sunny - with periods of overcast.

 

[Tooney]

here's the weather forecast for where I live - at least it'll be a dry heat!

Summer slogan of Arizona tourist bureau = "But it's a dry heat!"

 

[Hirschaj]

Ouch!

 

[Abdul]

It's positively balmy here ?

 

[Jhenson29]

It would be simple enough for Porsche to limit range mode if cooling is required beyond certain temperatures, and simply displays a warning and delays the selection.

I would think, even simpler, just allow the selection and activate cooling as required. But what do I know.

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