What is the hard limit in AMPS for DCFC?

[redgrandam]

What is the hard limit while fast charging in amps. Is it 400A? 450A?

Just trying to figure out with car scanner when the car is getting the max it wants/can take as the kw increases as the voltage increases.

I know they advertise it as 150kw, but not sure what exact pack voltage they use

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[GatorGrowl]

The design max for DCFC is around 350A at 430V, which is about 150kW. Some trims have a smaller capacity.
@Mach-Lee did a teardown of an AWD one: https://www.macheforum.com/site/thr...age-battery-junction-box-nk4z-10c666-c.20425/

 

[redgrandam]

The design max for DCFC is around 350A at 430V, which is about 150kW. Some trims have a smaller capacity.
@Mach-Lee did a teardown of an AWD one: https://www.macheforum.com/site/thr...age-battery-junction-box-nk4z-10c666-c.20425/

Hmm. I was doing a charge test on my month old LFP model. Supposed to go up to 150kw but information is mixed.

The charger I was at was listed as a 350kw charger. But I never got over 128kw. I noticed that the car was requesting 350A, and the charger said 350A output stamped on the side. So I’m just trying to figure out if the charger or car was the limiting factor. I believe that charger is supposed to be labelled as 150kw like the other ones there. They put the wrong sticker on.

The LFP battery only goes up to about 360V when fully charged. I think it was putting in a little more than that (I was around 15%SOC).

But if the car has a hard limit of 350A, then I don’t see how it is possible to ever get 150kw in the car.

I will have a NACS adapter soon so I can test at a Tesla charger. All the Electrify Canada stations around are only 150kw max ?

 

[AZBill]

The battery is not 430V, it is 403V at 100%. The real current limit is around 425A, but only for a short time. Below 50% SoC the charging is at 360-370V.

 

[AZBill]

Hmm. I was doing a charge test on my month old LFP model. Supposed to go up to 150kw but information is mixed.

The charger I was at was listed as a 350kw charger. But I never got over 128kw. I noticed that the car was requesting 350A, and the charger said 350A output stamped on the side. So I’m just trying to figure out if the charger or car was the limiting factor. I believe that charger is supposed to be labelled as 150kw like the other ones there. They put the wrong sticker on.

The LFP battery only goes up to about 360V when fully charged. I think it was putting in a little more than that (I was around 15%SOC).

But if the car has a hard limit of 350A, then I don’t see how it is possible to ever get 150kw in the car.

I will have a NACS adapter soon so I can test at a Tesla charger. All the Electrify Canada stations around are only 150kw max ?

I have seen 160kw on an EA charger and 155kw on a Tesla charger. But I have the ER battery. I bet the LFP battery is 360V nominal and 403V when full. I am not sure what limit they have on the current for the LFP, but I thought it was supposed to be able to charge at a higher C rate than the other chemistry.

 

[redgrandam]

I have seen 160kw on an EA charger and 155kw on a Tesla charger. But I have the ER battery. I bet the LFP battery is 360V nominal and 403V when full. I am not sure what limit they have on the current for the LFP, but I thought it was supposed to be able to charge at a higher C rate than the other chemistry.

Yeah. I had 362.5V as the pack voltage at 100% last week when I checked.
If the charge power limit is 425A at 360V that still gives 153kw.
I’ll have to run the test at the Tesla chargers. I know I won’t be charger limited there.

 

[Dear_OP]

Just wondering who makes the batteries for the LFP and NMC?

 

[Homestead]

Hmm. I was doing a charge test on my month old LFP model. Supposed to go up to 150kw but information is mixed.

The charger I was at was listed as a 350kw charger. But I never got over 128kw. I noticed that the car was requesting 350A, and the charger said 350A output stamped on the side. So I’m just trying to figure out if the charger or car was the limiting factor. I believe that charger is supposed to be labelled as 150kw like the other ones there. They put the wrong sticker on.

The LFP battery only goes up to about 360V when fully charged. I think it was putting in a little more than that (I was around 15%SOC).

But if the car has a hard limit of 350A, then I don’t see how it is possible to ever get 150kw in the car.

I will have a NACS adapter soon so I can test at a Tesla charger. All the Electrify Canada stations around are only 150kw max ?

Did you pre-condition battery before charging?
That is about what I got on my LFP model without pre-conditioning.

 

[redgrandam]

Did you pre-condition battery before charging?
That is about what I got on my LFP model without pre-conditioning.

Yes I did. I got up to the 350A the charger says it can output. Just looking for what the min charger amperage I need to get full speed on the LFP.

 

[Mach-Lee]

The hard limit on the extended pack is 450 amps for only a couple minutes. I’ve gotten 448 amps before.

So if you want peak, you have to find a charger that supports 450 amps or more. Typically a 180 kW @ 400V rated charger or higher.

 

[redgrandam]

The hard limit on the extended pack is 450 amps for only a couple minutes. I’ve gotten 448 amps before.

So if you want peak, you have to find a charger that supports 450 amps or more. Typically a 180 kW @ 400V rated charger or higher.

Thank you! Exactly what I was looking for.

 

[AZBill]

Yeah. I had 362.5V as the pack voltage at 100% last week when I checked.
If the charge power limit is 425A at 360V that still gives 153kw.
I’ll have to run the test at the Tesla chargers. I know I won’t be charger limited there.

So the LFPs are lower voltage, unless maybe Ford is also using a lower voltage in the standard packs versus the ER packs. If they deleted series cells, then that would be the case.

Be careful in your calculations, you will not get 425A at 100% SoC, i.e. if 360V is maximum you cannot get 153kw peak. As you near 100% you can only input a constant voltage at the maximum pack voltage, then the current is determined by the pack resistance.

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