Supercharging faster than 250kW?

[DblOSmith]

I know the max charging in Teslas currently is 250kW, but sometimes I go above that slightly. Yesterday I hit 258kW for about 5 seconds, and 257 for about 30 seconds. Anyone else tip faster than 250kW?

 

[GtiMart]

Yes, I saw 257 for a moment today. Nothing to worry about, it's what the car is requesting.

 

[DblOSmith]

Yes, I saw 257 for a moment today. Nothing to worry about, it's what the car is requesting.

Not worried. Just curious. If 250 is not the car's hard limit, I'm just wondering what is and in which conditions they happen.

 

[GtiMart]

I've heard SR+ models at 170kW limit get up to 180kW. I guess ours might go to ~260kW?

 

[threeputts]

I briefly hit 261kW in my '22 M3LR a couple weeks ago.

 

[terranx]

Not worried. Just curious. If 250 is not the car's hard limit, I'm just wondering what is and in which conditions they happen.

A good chunk of it is the battery heater (which I think can go upto 11kW on heatpump cars) using up power, leaving roughly 250 going into the battery itself

 

[israndy]

Curious what the mi/hr you are getting charging at 261kW?

 

[threeputts]

Curious what the mi/hr you are getting charging at 261kW?

Wasn't watching that unfortunately, it only showed 261 for a couple of seconds. Stands to reason mi/hr would be about 1117.

 

[israndy]

If you ever see it again, take a PIC (or it didn't happen)

 

[Big Earl]

The car displays the kW the charger is supplying, and the miles per hour of range (power displayed as rated range) that’s being added to the pack. The limit going into the pack is 250 kW, but the car is also consuming energy for battery conditioning and climate control. Depending on your car’s configuration, this can range from 3 kW to 11 kW of power above the 250 kW that the battery can take.

I’ve seen 258 kW in my 2018 dual motor, which corresponds to 250 kW battery charging plus 7 kW battery conditioning plus about 1 kW of climate control while sitting in the car.

 

[threeputts]

The car displays the kW the charger is supplying, and the miles per hour of range (power displayed as rated range) that’s being added to the pack. The limit going into the pack is 250 kW, but the car is also consuming energy for battery conditioning and climate control. Depending on your car’s configuration, this can range from 3 kW to 11 kW of power above the 250 kW that the battery can take.

I’ve seen 258 kW in my 2018 dual motor, which corresponds to 250 kW battery charging plus 7 kW battery conditioning plus about 1 kW of climate control while sitting in the car.

If you ever see it again, take a PIC (or it didn't happen)

Well now the challenge is on to reproduce it. I'll be sure to have the AC blasting and camera at the ready, but I'm not going back to Tomah WI just to test this .

 

[RTPEV]

It's not just that, but the "250kW" is not technically what the Supercharger is supplies. At low state of charge, it operates in constant current mode, so it's suppling a constant current (e.g. 600A). But as it does this, the battery voltage slowly rises (due to the charge being added). As the voltage rises, the power (which is voltage times current) also slowly rises, so you could see the power peak at above 250kW briefly before it switches over to constant voltage mode (at which point it will start to taper off).

All that is to say that V3 Superchargers are not technically 250kW chargers, but rather 600A chargers. But 250kW sounds better and more understandable.

Actually the V3 nameplate states that the output current is 631A and max voltage is 500V, and that doesn't mean that it's capable of 631*500 = 315kW (at least not that we know of) as the max current may be limited at high voltage levels (impossible to tell without the detailed charger specs), but it's not unexpected that the charger will deliver the full 600A (or whatever the car requests) and the power level to creep slightly above 250kW as the pack voltage increases.

 

[kishkaru]

V3 superchargers deliver 680A (or more) at peak. Not 600A.
See Bjorn's recent video, which shows 680A going into the battery pack while charging at 250 kW on a Model Y.
So likely more than 680A dispensed, if battery conditioning plus charging losses:

FWIW, I've also seen 257 kW displayed for a few seconds, right after plugging into a V3 station. But it quickly ramps down to 250 kW.

On the other hand, EA stations are current limited to 350A ("150 kW" stations), or 500A ("350 kW" stations).
This includes battery conditioning and charging losses, so the amps going into the battery is far lower.

 

[threeputts]

If you ever see it again, take a PIC (or it didn't happen)

So I haven’t taken a road trip since but here’s a pic posted by a fellow MNTesla FB group poster, just for @israndy :

 

[israndy]

According to the pic it's 39°F outside, so a lot of that number is going to running the PTC heaters to keep the cabin warm. I have seen my car go to 1070 MPH charging, so that one's pretty close to the peak.