Has anyone noticed…coasting at a full charge

[p52Ranch]

I don’t normally charge to 100% so this is a new phenomena I noticed this evening.
My Lightning was at 100% charge and the coasting behaved like the Lightning was in neutral rather than the normal coasting performance.
I expect a slight difference because the battery is fully charged but not as much as I observed tonight.
Scenario- ‘22 Lightning SR XLT. Lightning is in normal mode with One Pedal off.

At the top of my side road there is a 1/2 mile long road that is moderately downhill for 2/3rds of that distance. I normally accelerate to about 43 and use throttle to maintain that speed.
This evening I had 100% charge, accelerated like normal, took my foot off the throttle and it continued to gain speed to 47 which it held until I had to start braking.
Tonight I got back with 60% charge and decided to replicate the scenario. I accelerated to 50, took my foot off the throttle and let it coast towards the intersection. I was down to 32 mph by the time I got to the braking spot.
This seems to be a significant and unexpected difference in vehicle performance.

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[GDN]

Its hard to know not being there, but the way you describe it, truly seems just like it is the full battery and not being able to capture any regen.

 

[tommyb]

Yup, very likely what GDN said, at or near full charge you're probably not getting regen. My Tesla worked similarly, when fully charged no regen until it dropped to about 90% battery level I think. The Tesla manual specifically mentioned this, I couldn't find any mention in the Lightning manual.

 

[p52Ranch]

Its hard to know not being there, but the way you describe it, truly seems just like it is the full battery and not being able to capture any regen.

I think this demonstrates how much regen is programmed in Normal mode just to make the Lightning respond like an ICE F150 with all sorts of driveline losses. As I noted with the full battery, the Lightning rolls along very efficiently even more so than an ICE F150 that is in neutral.

 

[uniblab]

I have the exact same truck and noticed exactly the same thing - almost zero regen the first time I brake after leaving a charging station with 100% charge.

 

[RickLightning]

Yes, it is a known fact that at 100% regen is nearly nothing, battery is full.

 

[MM in SouthTX]

I have noticed the improved coasting as well. It is as if you have shifted to neutral. Does this mean then that (absent a full charge) regen kicks in every time you take your foot off the gas, without touching the brake? If the answer is yes, I guess the engineers decided that either
1. The truck coasts too well, so they added regen to make it act more like a regular car, or
2. They decided that decelerating with regen is more efficient than coasting. The second seems unlikely.

 

[RickLightning]

I have noticed the improved coasting as well. It is as if you have shifted to neutral. Does this mean then that (absent a full charge) regen kicks in every time you take your foot off the gas, without touching the brake? If the answer is yes, I guess the engineers decided that either
1. The truck coasts too well, so they added regen to make it act more like a regular car, or
2. They decided that decelerating with regen is more efficient than coasting. The second seems unlikely.

Yes, regen always exists when you take your foot off the accelerator. To show that, shift to N and you'll see what zero regen feels like.

The Mach-E is this way also.

1) No.

2) Regeneration is used in vehicles with blended braking, which is what we have.

 

[MM in SouthTX]

Yes, regen always exists when you take your foot off the accelerator. To show that, shift to N and you'll see what zero regen feels like.

The Mach-E is this way also.

1) No.

2) Regeneration is used in vehicles with blended braking, which is what we have.

I have posted a couple of times on the difference between coasting in drive and coasting in neutral. I am aware of the difference. I assumed it was due to friction in the drive train when connected to the electric motors. I don’t see how noting the difference proves that it is regen that accounts for the difference, as opposed to friction.

Regarding number two, I’m still curious, if it is regen during coasting, why the engineers decided it was a good idea.

 

[Pioneer74]

Sounds like Whisper mode in the Mach-E. It feels like it would coast forever. Didn't like it and switched to Engage.

 

[p52Ranch]

I have posted a couple of times on the difference between coasting in drive and coasting in neutral. I am aware of the difference. I assumed it was due to friction in the drive train when connected to the electric motors. I don’t see how noting the difference proves that it is regen that accounts for the difference, as opposed to friction.

Regarding number two, I’m still curious, if it is regen during coasting, why the engineers decided it was a good idea.

I think the Ford engineers want the Lightning to feel just like a F150 when you let off the accelerator so they included a bit of regen to slow it down in normal mode. The 100% battery coast I got yesterday evening felt really weird just because the Lightning wasn't slowing down like any other vehicle I've drive over the past 50 years.

I've charged to 100% a few times over the past 10 months but hadn't noticed this before. I normally drive the other way to town so I don't normally start out going downhill. I still got a 100% brake regen score when I stopped so there must have been some capacity for regen.

 

[RickLightning]

I think the Ford engineers want the Lightning to feel just like a F150 when you let off the accelerator so they included a bit of regen to slow it down in normal mode. The 100% battery coast I got yesterday evening felt really weird just because the Lightning wasn't slowing down like any other vehicle I've drive over the past 50 years.

I've charged to 100% a few times over the past 10 months but hadn't noticed this before. I normally drive the other way to town so I don't normally start out going downhill. I still got a 100% brake regen score when I stopped so there must have been some capacity for regen.

But the Mach-E, introduced a year prior, does the exact same thing, so it has nothing to do with making the Lightning like an ICE F-150.

 

[Grumpy2]

I was really impressed with how friction less they got the electric gearing, and how "normal" the regen works. I get 100% recovered almost every time I stop, and the truck seem to recover almost all of the extra energy climbing a hill "coasting" and "braking" down the other side. Quite impressive the regen works so well.

 

[Calvin H-C]

My Lightning was at 100% charge and the coasting behaved like the Lightning was in neutral rather than the normal coasting performance.

Having over five years experience with a Focus Electric, I can say that charging is disabled if the SOC is over some value (likely between 95 and 98% - it is changeable but not through the Sync interface) in order to prevent overcharging. This value only comes into play when charging starts, so if you start below that, it will continue to 100% if that's what you want.

This check is done whether the charging is by plugging in the vehicle or by regen. So, when you coast with a nearly full battery, it won't use regen braking just as you describe.

 

[MM in SouthTX]

But the Mach-E, introduced a year prior, does the exact same thing, so it has nothing to do with making the Lightning like an ICE F-150.

Unless they wanted the Mach-E to behave like an ICE vehicle also.

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