2024 Mach-E charging curve comparison vs. 2021 Mach-E

[Nolanbro]

Ok, so heres the explanation behind these two graphs.

Range replenishment is based on my car having no degradation (orange line). Blue line is based on the 88kWh of the 21s. My car had the update to 91. I calculated by taking kWh added and multiplied by the car's EPA HIGHWAY consumption. 2.81 for 21s and 2.94 for the 24. The lines end when charging ends. Eventually, the Gray and Orange line would converge, and the Blue line would continue higher due to it being more efficient, therefore more range. The reason the 21 New software and 24 is due to the Supercharger surging on the 24. Likely it would be a little bit higher.

Time vs Percent is pretty self-explanatory.

In conclusion, 2024 is really only faster at lower SOC >50% and isn't going to be changing anyone's road trip times by a significant amount unless you only stop for 15 mins like me.

PS. I updated the curve based on Bjorn test of a 21 using kW into the battery instead of into the port. Its slightly different than the previous curve I posted.

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[silverelan]

Thanks for plotting Kyle’s curve out. Here’s a 0-100% test that Out of Spec did on a 2022 GT for reference on what appears to be a 150kW charger.

https://public.tableau.com/app/profile/ryan.kassel/viz/Chargingcurves_2/Sheet2

 

[Nolanbro]

Thanks for plotting Kyle’s curve out. Here’s a 0-100% test that Out of Spec did on a 2022 GT for reference on what appears to be a 150kW charger.

https://public.tableau.com/app/profile/ryan.kassel/viz/Chargingcurves_2/Sheet2

This curve is really weird and it almost seems like the charger was limited to 300 amps. I've never had it taper that smooth before.

 

[Blue highway]

This curve is really weird and it almost seems like the charger was limited to 300 amps. I've never had it taper that smooth before.

To my understanding the new curve is much closer to ideal, and what I see with large Lithium batteries in other applications... The current should taper steadily as the SOC rises... not the large step changes we were seeing. The top rate is whatever the BMS thinks the max C rate for charging is. Ford has used 1.5C in the MMEs. 4C is the highest I've seen any EV go and it definitely flogs the cells.

 

[Earplug]

The physic's of batteries and how it relates to charging curves.

 

[silverelan]

This curve is really weird and it almost seems like the charger was limited to 300 amps. I've never had it taper that smooth before.

What's clear to me is that Ford has quietly changed the 2021-23 charge curve. I know I replied to a @Mach-Lee post about it a couple months back.

The orange curve you illustrated was the classic original one that peaked then had two plateaus before dipping to 40kW at 80%. The revised curve we now see tapers like the 2024 that Kyle showed, at least after 70% or so.

Hey Lee, thanks so much for the report! That was an interesting tidbit on the adjustment to 40C.


Maybe it's just a function of the cooler temps, but I noticed on your charge curve graph the same amperage drop I observed in my recent DC fast charges. The MME no longer seems to hold ~215A between 70% and 80%. In the past, I would see a flat power level of 75-80kW all the way to 80% but now it's down into the 60kW range right before the 80% drop.

Unless Ford updated the boost to be longer than 2 minutes, net result of the lower amps is slower charging to 80%.

 

[silverelan]

What's clear to me is that Ford has quietly changed the 2021-23 charge curve. I know I replied to a @Mach-Lee post about it a couple months back.

The orange curve you illustrated was the classic original one that peaked then had two plateaus before dipping to 40kW at 80%. The revised curve we now see tapers like the 2024 that Kyle showed, at least after 70% or so.

I don't drive enough to take my car down to 10% and do a proper charge test but I'm intensely curious to see what a legit 10-80% charging session on a 2021+ ER pack MME looks like now.

 

[Nolanbro]

I don't drive enough to take my car down to 10% and do a proper charge test but I'm intensely curious to see what a legit 10-80% charging session on a 2021+ ER pack MME looks like now.

The orange line is my cars performance. Which is a 2021 ER pack. I have the latest powertrain software. I think Kyle's test may have been run in colder temps. In my experience mach e past 40% is hit or miss weather it tapers down or holds 100kW for longer.

 

[silverelan]

The orange line is my cars performance. Which is a 2021 ER pack. I have the latest powertrain software. I think Kyle's test may have been run in colder temps. In my experience mach e past 40% is hit or miss weather it tapers down or holds 100kW for longer.

Thanks for the clarification. Yeah, now that you mention it, i can see the >70% taper in your orange line too. The old blue line holds the 80kW plateau all the way to 80% which is what we had back in Jan of 2023 from @louc757 (see link + graph below).

https://www.macheforum.com/site/threads/mach-e-fast-charging-rate.25126/

What's really interesting to me is comparing your charge session against the original curve (orange vs blue). That big gap between the old curve and in your session, it appears to have held the 90+kW plateau for a good deal longer than the old curve. That would potentially speed things up on a road trip if you unplug around 70-75%.

 

[silverelan]

The original charging profile was time based and per Darren Palmer was designed for the most consistently optimal 15-20 minute charging session experience in the worst scenarios. The strategy was that owners can count on the same charging speeds pretty much anywhere along the SoC range between 0-50%.

15 mins = 30% recharge
20 mins = 40% recharge

I'm wondering if that "20 mins = 40%" bracket has changed/improved. Maybe I'm just being overly optimistic.

 

[Gloff]

Don't some of the 2024 models have LFP batteries? Or is that only Premium standard range still?

I'm assuming the one you tested is still Li-Ion

LFP is standard range cars only for both 2023.5 (Job 2) and 2024. Extended Range is NCM from 2021+

 

[Nolanbro]

The original charging profile was time based and per Darren Palmer was designed for the most consistently optimal 15-20 minute charging session experience in the worst scenarios. The strategy was that owners can count on the same charging speeds pretty much anywhere along the SoC range between 0-50%.

15 mins = 30% recharge
20 mins = 40% recharge

I'm wondering if that "20 mins = 40%" bracket has changed/improved. Maybe I'm just being overly optimistic.

I think this strategy is good for the novice ev owner as they don't have to worry about arriving with low SOC. For pure time efficiency though, the new curve is better if its based on SOC. In WNY chargers are scattered so sometime you arrive to one at 30% still, and based on the time based curve there is no incentive to arrive at a lower SOC, but if the new curve isn't like this, it could actually be slower than it being time based.

 

[silverelan]

@Angelnx1985 has separately confirmed it on a 150kW EA Charger. The charge curve appears to have changed. Based on OP's post and also Merchy's YouTube video, the time to add 70% back to the pack is down to 38-39 minutes. We can contrast that with the 43 mins it took @Mach-E VLOG to go 10-80% last year (vid below).

Merchy - June 2024


Liv & Patrick - April 2023

 

[silverelan]

@Angelnx1985 has separately confirmed it on a 150kW EA Charger. The charge curve appears to have changed. Based on OP's post and also Merchy's YouTube video, the time to add 70% back to the pack is down to 38-39 minutes. We can contrast that with the 43 mins it took @Mach-E VLOG to go 10-80% last year (vid below).

Merchy - June 2024


Liv & Patrick - April 2023

@Mach-Lee do you have any guesses on when we got the improvements and where in the curve we’re seeing the changes?

 

[Mach-Lee]

@Mach-Lee do you have any guesses on when we got the improvements and where in the curve we’re seeing the changes?

Sorry what improvements are you talking about?

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