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Tesla Supercharging - Summer 2019 Update

Bo (ABRP)

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(Edit 2019-08-16: Added Model 3 SR+)

(Edit 2019-09-06: Added BT70)

Since we last wrote about Tesla supercharging, Tesla vehicles have received quite a few software updates (as usual). Some seem to have modified the charge curves of some car models, and especially the classic Model S 85 owners have been noticing some relatively big decreases in charging power.

As usual, we at ABRP have actual data thanks to our generous users who contribute it by logging in with their MyTesla account in ABRP and checking "Share data" (and even "36h Background sharing") for us. This is all thanks to you!

So, without further ado, let's dive into plots.

BT85, the classic Model S85(D) 85 kWh battery

The plot below shows charging data for BT85 from May 2019 through August 2019. The blue dots shows all samples collected by ABRP during supercharging for those vehicles, and the red curve shows the ABRP charging model for S85 based on data up to May 2019. As you can see, it still seems to model good charging performance pretty well.

BT85_s85_May-August2019.png.b90db18239b2d30f567b0a550ffbe0d7.png

However, somewhere in June, the charging speed was changed after a SW update. The new charging data, now only from July-August is substantially different:

BT85_s85_July-August.png.be93535c0173f48c73cc9d314ad15448.png

The red curve is the same as above, and the additional green curve now models the new behavior based on the new data. Obviously, the charging power drops much earlier at lower SoC (battery %), which leads to a slower typical charge sessions.

Our standard charging benchmark from 10 kWh to 50 kWh has changed from 29 minutes (May) to 34 minutes (August) for the BT37. No disaster, but also not so fun for S85 owners.

BTX6, Model S/X 100D 100 kWh battery

BTX6_x100d.png.bccbbf35ad8f44ed0b94457dd38620a6.png

When we last updated the BTX6 battery model, after the spring Supercharging power increase, we noted that while peak power was indeed increased to 140 kW, it usually quickly dropped down to 120 kW, probably due to thermal issues. Now, while most data is from Superchargers with only 120 kW capacity, there are quite a few sessions where charging power is sustained at 140 kW. Good news for 100D owners!

BTX4, Model S/X 90D 90 kWh battery

The not-so-fantastic "90" kWh battery (actually 82) has also been slightly modified, with most sessions seemingly limited to 120 kW. We have updated the ABRP model accordingly.

 BTX4_s90d.png.73f1464cb05a343389d005f632372c6a.png

Note that there seems to be a collection of sessions which peak at about 94 kW, this may be the infamous charging power limited vehicles which have Supercharged "too much".

BTX5, Model S/X 75D 75 kWh battery

BTX5_s75d.png.fc2200f4f40999a64990eb72d0c571ec.png

Only minor changes can be seen in the charging curve for the BTX5 battery and we have updated ABRP accordingly.

BT37, Model 3 Long Range battery

BT37_3long.png

The fast-charging Model 3 Long Range battery does thankfully not seem to have changed at all! The curves show the fast 190 kW charging for users at Ionity HPC stations, and then up to 150 kW charging at fast Tesla Superchargers.

Model 3 SR+ battery

ABRP is starting to have a get a fair amount of data from Model 3 Standard Range Plus cars, which means we can also show a new charge curve for this one. It seems like Tesla has decided to put a hard cap on peak power at 100 kW for the SR+, at the same time extending the region with high power charging further. Since the SR+ battery capacity is rather small, this means that often supercharging is actually faster with the new curve - good news!

BT37_tesla_m3_19_bt36_none.png.1b7bb2d77dbe859d01a228a3d4667e02.png

BT70, the Model S70 battery

Similar to the BT85, the BT70 has received reduced charging speed. We don't have tremendous amounts of BT70 data, but it is still enough for us to see a clear change. New model is released in ABRP..

BT70_s70d.png.e09ac44837b5a9a624ba113b0c1b1f01.png

Summary

As usual, ABRP is building our car charging and consumption models on real-world data. Thanks to our fantastic users who donate data, we can continuously update those models, and we try to publish our findings here to give back to those who donated!



6 Comments


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Thank you very much for sharing the data you have collected and keeping ABRP uptodate with the real world charging curves!

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Guest Odd Bakken

Posted

The curve for the 85 kWh battery is exactly like mine. The drop came with  the 24.4 sw.
Charging from 10 to 60% takes 22% longer now :(

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Guest Andrew

Posted

How’s the real world data for the battery pack in the SR+? Are you starting to gather enough data points to start sharing that? It certainly seems artificially limited... so I wouldn’t be surprised if Tesla starts to tweak that based on crowding issues and more long term data collections.

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1 hour ago, Guest Andrew said:

How’s the real world data for the battery pack in the SR+? Are you starting to gather enough data points to start sharing that? It certainly seems artificially limited... so I wouldn’t be surprised if Tesla starts to tweak that based on crowding issues and more long term data collections.

Good point! I just added the data and new charge curve for the SR+ too. 

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Guest Jmk

Posted

You updated the 100 pack to the ’peak’ graph but did not do this for the 75? Similar max 127kW shadow is visible on the 75 data. My X consistently pulls that 127kW.

 

 

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"Our standard charging benchmark from 10 kWh to 50 kWh has changed from 29 minutes (May) to 34 minutes (August) for the BT37. No disaster, but also not so fun for S85 owners."

Hi,

regarding your "standard charging benchmark" as stated below the second graph for BT85/Model S85. "from10 kWh to 50 kWh", I presume you are referring to soc (state of charge)? Which figure are you using for an Model S 85 were you have API access through a token? Do you use NR (nominal remaining) or UR (usable remaining)?

28th June 2019 my battery reported a NFP (nominal full pack) capacity of 65,5kWh with an energy buffer of 4kWh thus a UFP (usable full pack) of 61,5kWh. At the moment of data collection, the SOC was displayed in the car with 71% which is referring to the UFP & UR figures: UR 43,7kWh are 71,1% of UFP 61,5kWh.

Do I presume correct, that you calculate the "standard charging benchmark" individually and according to the reported UFP figures?

As an example, when my car is connected to a SC with e.g. 9%, this equals individually for my car to 5,54kWh soc. Your benchmark will start counting when my soc reaches 10kWh/16,3% and stops when hitting 50kWh/81,5%. this takes currently 49 minutes according to the logs of my car. I compared several charging sessions and came to the same time. I ensured that up until 12% soc the SC was able to provide 114-116kW, thus external limitations would be neclectable.   Is my Model S85 so much worse than most of the others? ...thanks for the great work! BR Oaito.

PS: Since the quoted sentence is referring towards Model S 85 you probably put in the Battery Type BT37 by mistake.

2PS: I use teslalog.com for data collection. Are you still interested to add a 2015 Model S 85 with 185000km (HV battery replaced at 107000km)?

Edited by oaito

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