Why 150 KW Fast Charging Limit ?

[RickLightning]

I've been trying to explain this to people for *years*.

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[adoublee]

The truck limitation (assuming FORD allowed the absolute maximum rate the truck could accept) comes down to the battery voltage (assume 400v, but its actually less, like 385v I think) and the maximum amperage of the charging station. I think the max amperage offered at DC fast chargers is 500 AMP, so

400v X 500 AMPs = 200 KW. That would be the theoretical max the truck could accept and actually slight less if you did 385v X 500 amps.

Regardless, what matters most is charging curve, and even compared to 800v vehicles, the lightnings charging curve from 10-80% is very comparable to Rivian and the Hummer EV, so probably spend less than 10 extra minutes at a charger on average compared to the ideal chargers the other trucks may offer.

Yes - I'd be plenty happy with the 150kW (170kW in reality) if I could access the full rated power of every DC fast charger in the ground today. This would take an 800V nominal battery at many chargers. Change to 800V is MUCH more important than trying get to crazy fast power levels that will only be held for a couple minutes.

 

[vandy1981]

but its actually less, like 385v

It's in the 330V territory at lower states of charge and around 390V when fully charged. So you're not going to be able to pull more than 165 kW at low states of charge. I've seen up to 172 kW but I'm assuming that this reflects losses to battery and cabin conditioning.

 

[jefro]

Part of the Texas VW deal was that if a station had two cables then each had to provide at least 150kWh even if the other was in use.

 

[FlasherZ]

It's in the 330V territory at lower states of charge and around 390V when fully charged. So you're not going to be able to pull more than 165 kW at low states of charge. I've seen up to 172 kW but I'm assuming that this reflects losses to battery and cabin conditioning.

And the reality is that a lot of charging stations have it set much lower.

350 kW stall (only one I could reach with a 22' trailer attached) at EA station in Effingham, IL last week only gave me ~315A. At 25% SOC, I only got 110 kW or so until the truck reached 40-50% SOC when it climbed up to about 120 kW.

 

[EVTruckGuy]

All ev’s take about 45 minutes to an hour to charge or they well get hurt.

That's simply not true.

The Taycan went from 0% to 80% in 28 minutes, and this was using a 150 kw charger.

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