My 2021 Mach-E received 91 kWh upgrade (useable at 100% SoC)

[generaltso]

You get a % scale in whisper mode.

You don't have to be in whisper mode.

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[Shayne]

Except that with batteries, capacity is a moving target.

“Full” is relative based on many factors. Same with “half full” and “empty.”

The accuracy of the gauge isn’t the issue.

You get a % scale in whisper mode.

Always highway always whisper.

For me the accuracy is. Understand it depends on factors but when you charge to 100% for a trip is it not possible to read whatever energy you have when powered up and divide that by 100? The 25 miles from 100% to 99% every time does not help for the gas gauge math.

 

[dbsb3233]

The capacity/100 would work. Not 100 to 99 is 5% (real bug) and there is another 3.5% you don't see.

I've wondered about that 100% mark on the GOM. It does seem to reflect more than just a 1% gradient. As in, not all 100%'s are the same.

For instance, sometimes 100% will temporarily deactivate regen. I've had it happen twice. But most of the time it hasn't, like there's a mostly full 100% and a really full 100%.

 

[Mach1E]

You don't have to be in whisper mode.

Maybe the GT display is different, but I drive in engage most of the time and I can’t see the %. Just have the GOM range and a bar across the bottom. In whisper the bar changes to a %.

Edit- looks like it’s a % in unbridled as well but I never use that mode.

Engage-

 

[Mach1E]

Always highway always whisper.

For me the accuracy is. Understand it depends on factors but when you charge to 100% for a trip is it not possible to read whatever energy you have when powered up and divide that by 100? The 25 miles from 100% to 99% every time does not help for the gas gauge math.

Nope. Because as people with scanners have pointed out, 100% is a different number based on ambient temp, battery temp, etc.

Your old ICE car gauge wasn’t any better. “Full” and you could still add a gallon. “Empty” and you still had a gallon.

I’m assuming the “25 miles” is an exaggeration. Only seen people complain that they go like 5-7 miles before the 100% changes.

But even so, what difference does the 99%-100% display make to your trip?

I’m guessing it’s on purpose that they display it like that. They DON’T want you charging your car again if it’s only a few miles from “full.”

 

[Tyldum]

Preheated FE (AWD LR) with ambient temperature of 12C reports 86KWh remaining at 100% SoC.
It's supposed to have the update...

On a side note my 100-99% lasts as long as 80-86 in general.

 

[generaltso]

Maybe the GT display is different, but I drive in engage most of the time and I can’t see the %. Just have the GOM range and a bar across the bottom. In whisper the bar changes to a %.

Edit- looks like it’s a % in unbridled as well but I never use that mode.

Engage-

Turn on lane keep and the percentage in Engage looks just like the other modes.

 

[Shayne]

Nope. Because as people with scanners have pointed out, 100% is a different number based on ambient temp, battery temp, etc.

Your old ICE car gauge wasn’t any better. “Full” and you could still add a gallon. “Empty” and you still had a gallon.

I’m assuming the “25 miles” is an exaggeration. Only seen people complain that they go like 5-7 miles before the 100% changes.

But even so, what difference does the 99%-100% display make to your trip?

I’m guessing it’s on purpose that they display it like that. They DON’T want you charging your car again if it’s only a few miles from “full.”

Nope your logic makes no sense yet to me? So you saying that the energy which is different due all those multi whatever's can not be read at start up and divided by 100. Don't believe it. Other ev's do not seem to exhibit this I will point you to Nyland's review of the MME over a year ago.

We are hoping you are not equating a high tech ev with a dumb ass gas car? I have 75 miles of reserve when my truck hits empty do not see the point and/or the correlation with this one. Lots of gas station around and I do not check range in a gas vehicle even when it is -10F. I certainly do on cold weather trips on this one.

What it does is tells you that you have 2500 miles range for the first % and throws off the whole math for the first leg of the trip. This is inaccurate on propose? Thumbs up on that.

 

[MachEnthusiast]

I think the MME has brought in a ton of first-time EV owners, not just EV enthusiasts. So giving them the same experience being able to drive after hitting 0 is critical, I think. Many will assume they can do this.

 

[Mach1E]

Nope your logic makes no sense yet to me? So you saying that the energy which is different due all those multi whatever's can not be read at start up and divided by 100. Don't believe it. Other ev's do not seem to exhibit this I will point you to Nyland's review of the MME over a year ago.

We are hoping you are not equating a high tech ev with a dumb ass gas car? I have 75 miles of reserve when my truck hits empty do not see the point and/or the correlation with this one. Lots of gas station around and I do not check range in a gas vehicle even when it is -10F. I certainly do on cold weather trips on this one.

What it does is tells you that you have 2500 miles range for the first % and throws off the whole math for the first leg of the trip. This is inaccurate on propose? Thumbs up on that.

No.

What I’m saying is that it can be divided by a percentage. And that’s exactly what Ford displays on your % gauge.

But what I’m also saying is that the percentage is not exact.

We aren’t dealing with exact science here, no matter how closely you measure it.

The math is NOT exact. “100%” changes constantly and again is still just a guess. Batteries aren’t like gas tanks where you can measure exact volume.

Just read some of the threads about the scan logs or get your own scanner and you’ll see.

No clue what you’re saying about the % display throwing off your math. The car does the math for you with range til empty. You don’t need to figure math based on 99 or 100% charge and shouldn’t be trying to do that math anyways. Do you plan your trips where a 1% difference in displayed charge will matter? I hope not.

 

[Mirak]

I’m confused. So are you guys saying that SOC (reflected as battery percentage) is no more reliable than the GOM (reflected as miles to empty)?

When I see 100% SOC, I’d like that to be 100% of 91kWh. Even if SOC isn’t exactly accurate at the battery depletes. “Hiding” the extra 3kWh below 0% SOC would be very aggravating, if that is what is happening.

For what it’s worth, and without any fancy software or equipment, I have noticed that when I fully charge to 100% I do get more miles from 100-99 than I do after cracking that seal.

 

[Mach1E]

I’m confused. So are you guys saying that SOC (reflected as battery percentage) is no more reliable than the GOM (reflected as miles to empty)?

For what it’s worth, and without any fancy software or equipment, I have noticed that when I fully charge to 100% I do get more miles from 100-99 than I do after cracking that seal.

Yes.

But I’m also saying that it’s true for all lithium batteries.

Is 50% really 50%? It depends on lots of moving factors. Temperature, discharge rate etc.

Ever had a phone battery go from 30% to 5% real fast when it was hot or cold?

It wasn’t because you used up all the power all of a sudden.

Just googled an article that seems to explain it decently;
https://www.scienceabc.com/innovati...stimate-the-state-of-charge-of-batteries.html

Short answer: Accurately determining the amount of charge left in a battery is no easy task, but there are a few methods that can be used, including estimation based on voltage, estimation based on current (Coulomb Counting), and estimation from internal impedance measurements. All these methods rely on measuring a convenient parameter that changes as the battery is charged/discharged.

However, all these methods have their own shortcomings, and therefore cannot be relied upon to provide 100% accurate readings of the ‘remaining charge’ in the battery. Also, some of these methods are specific to certain cell chemistries.

 

[mkhuffman]

When I see 100% SOC, I’d like that to be 100% of 91kWh. Even if SOC isn’t exactly accurate at the battery depletes. “Hiding” the extra 3kWh below 0% SOC would be very aggravating, if that is what is happening.

100% on the display is sometimes 91 kWh. Many times it is less. It consistently less in the winter. I was reading 81 kWh to empty at 100% in the middle of winter when it was very cold outside.

100% SoCD is the maximum charge the car will allow based on various parameters including climate. 0% SoCD (per what Ben learned) is 3 kWh or more (there was a buffer there previously as well).

 

[Mirak]

100% on the display is sometimes 91 kWh. Many times it is less. It consistently less in the winter. I was reading 81 kWh to empty at 100% in the middle of winter when it was very cold outside.

100% SoCD is the maximum charge the car will allow based on various parameters including climate.

If this is true, then that’s fine. But I don’t think that has been confirmed. I understand that conditions might alter how many kWh = 100%.

0% SoCD (per what Ben learned) is 3 kWh or more (there was a buffer there previously as well).

If this is true, then that’s not fine, and it contradicts what you said above.

 

[mkhuffman]

If this is true, then that’s fine. But I don’t think that has been confirmed. I understand that conditions might alter how many kWh = 100%.



If this is true, then that’s not fine, and it contradicts what you said above.

I don't understand your response. 100% = maximum charge allowed by the car. 0% = 3 kWh or more (maybe 4-5 kWh). I am not running my car to 0% to validate what Ben reported, however.

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