Discovered: GTPE Delivers 5 Seconds of Full Power on Acceleration Then Reduces Battery Power to Limit Heating

[Frankie]

Please outline a reasonable, legal, scenario where that would ever be an issue. Every V&T law that I am aware of prohibits exceeding the speed limit even in passing situations. Not to put too fine a point on it, but driving the way you describe here is both illegal and being an a**hole.

lol you really gonna spend your time in the performance subforum chiding people for exceeding the speed limit?

Sponsored

 

[Sitdown]

I hate to even weigh in at this point in the thread, but would someone be willing to take some actual measurements using CarScanner Pro and an ODB interface (inexpensive Viecar Bluetooth 4 version works well)?

The data scan rate is about 0.6s when looking at a handful of points, and if we had vehicle speed, battery temperature, battery range high (the max cell temp), battery voltage and battery current I'm sure we could tell a lot more about what is going on.

One thing I'll note is that I don't think it is about full-pack thermal management. I've done a lot of fast pulls on my Premium and the overall battery is not getting very warm. The cooling on the battery seems good to me. The issue is probably more about the C-rate being put on the battery. A GTPE at full power is putting nearly 4C discharge rate on the battery, which is very high for a battery of this design. That might cause local heating, but isn't heating up the whole pack. The issue is probably just the C-rate itself, which can cause battery degradation and cell separator damage if it persists.

Someone asked about internal resistance, the IR of the Extended Range battery is 35.5mOhms, which is quite good, the battery isn't losing much to heat.

I suspect the 5 seconds and the rate of foldback is somewhat conservative, and that Ford/LG cares more about the Crate than they do about the average battery temp.

But more data would help us understand more.

Happy to try and log that all, will reach out if I need more direction.

I have the 'DashCommand', 'OBD fusion', & 'Car Scanner' Apps. Is the Pro version is avail for apple?

Can't imagine its changed that much, but will see how my 2014 model SimValley ELM327 OBD II Wifi works...

 

[buzznwood]

Please outline a reasonable, legal, scenario where that would ever be an issue. Every V&T law that I am aware of prohibits exceeding the speed limit even in passing situations. Not to put too fine a point on it, but driving the way you describe here is both illegal and being an a**hole.

This is a world vehicle and your thinking needs to go beyond these shores to account for places that have a legal highway passing speed that is far beyond the top speed of the mach-e and where the piss poor lane discipline that is standard practice is the USA is not tolerated and overtaking and moving back as quickly as possible is normal.

 

[Sitdown]

new forum rule idea for the PERFORMANCE | TRACK | RACING sub-group:

Please refrain from any comments/opinions/statements similar and/or not limited to...

"Why do you need to go this fast"
"it's illegal"
"enjoy it as it is"
"don't speed"
"take a minute to consider you are potentially endangering the lives of your fellow motorists"[edit]

and so on...

 

[BMT1071]

new forum rule idea for the PERFORMANCE | TRACK | RACING sub-group:

Please refrain from any comments/opinions/statements similar and/or not limited to...

"Why do you need to go this fast"
"it's illegal"
"enjoy it as it is"
"don't speed"
and so on...

I'm all for that if we're talking about track and racing situations. The post that got this started was referring to highway driving. Do whatever you want/can get away with on the track/closed course. Maybe take a minute to consider that you are potentially endangering the lives of your fellow motorists if you are treating public highways like a race track?? ? ?

 

[Frankie]

It's amazing that you've never once exceeded the speed limit while passing someone that is a very impressive feat, thank you for sharing it with us I am extremely glad that you are here posting with us about these subjects it is very useful and a good use of your time.

 

[BMT1071]

This is a world vehicle and your thinking needs to go beyond these shores to account for places that have a legal highway passing speed that is far beyond the top speed of the mach-e and where the piss poor lane discipline that is standard practice is the USA is not tolerated and overtaking and moving back as quickly as possible is normal.

It is not a "world" vehicle. There are NA spec cars and there are cars spec'd for other regions. Just because there are roads without speed limits in other countries doesn't mean people drive recklessly on them. As statistics will bear out, and in my personal experience, European drivers are better trained and safer than US drivers.

 

[JimmyMachE]

I have the 'DashCommand', 'OBD fusion', & 'Car Scanner' Apps. Is the Pro version is avail for apple?

Yes, Car Scanner Elm Obd2 app works on Android and iPhone. With 2-3 sensors on screen there is no discernible delay (I enabled optimization of CAN- and UDS requests).

Mustang Mach-E profile should be manually selected at the setup:

 

[Frankie]

Please outline a reasonable, legal, scenario where that would ever be an issue. Every V&T law that I am aware of prohibits exceeding the speed limit even in passing situations. Not to put too fine a point on it, but driving the way you describe here is both illegal and being an a**hole.

Have you never been on a two lane highway with a bunch of semis and motorhomes where you needed to make a bunch of successive overtakes?

Do you really need to be like this?

 

[Frankie]

It is not a "world" vehicle. There are NA spec cars and there are cars spec'd for other regions. Just because there are roads without speed limits in other countries doesn't mean people drive recklessly on them. As statistics will bear out, and in my personal experience, European drivers are better trained and safer than US drivers.

I bet you're a lot of fun at parties.

How are the GT performance related specs different between NA and other regions?

 

[Sitdown]

Yes, Car Scanner Elm Obd2 app works on Android and iPhone. With 2-3 sensors on screen there is no discernible delay.

Mustang Mach-E profile should be manually selected at the setup:

I'm all set, the pro was a $6 upgrade within the free verison of the app Looking like a dry weekend to give it a test

 

[phidauex]

I'm all set, the pro was a $6 upgrade within the free verison of the app Looking like a dry weekend to give it a test

Awesome! A few tips for getting good recordings:

• Turn on Data Recording with a checkbox in the "data recording" tab. This will cause the unit to record any points that are visible.
• Under "Interface" turn on "show ping" which will show you the data scan rate for each point.
• Setup a Dashboard with just the points you want to monitor, and no more, that will make the recording go as fast as possible.
• The recording starts when you Connect, and ends when you Disconnect. If you don't Disconnect when done, the recording won't get saved.
• Swipe the recording in the Data Recording tab to get an option to export. Choose "CSV #2" which is easier to use in Excel.
• The recording files can be tough to use with normal formulas since it stores each record as it comes in. I have a Python script that resamples the data to 0.5s intervals which makes analysis a little simpler. Happy to clean up any logs you produce that you want to look at in more detail.

 

[Pushrods&Capacitors]

This is a world vehicle and your thinking needs to go beyond these shores to account for places that have a legal highway passing speed that is far beyond the top speed of the mach-e and where the piss poor lane discipline that is standard practice is the USA is not tolerated and overtaking and moving back as quickly as possible is normal.

I’ll just leave it at this; Here in Texas we have speed limits up to 85mph on the toll roads and 75mph on the Interstates. Hell, there are 2 lane country roads that are 75mph. On the tolls I’ll go 95-100mph on the reg and still move over to the right for cars overtaking me in the left lane. And I’m usually going with the flow or just out ahead to give myself space.
That’s just how we roll here. And when you get close to Houston or Dallas be ready for things. ?

The fastest way to pass safely is to pass quickly when all is clear. The fastest way to pass quickly is to achieve higher speeds rapidly. It doesn’t mean drive like an ass though.

I’m much less of a threat to the driving public than Joe or Jane Blow staring at their screen or phone or sucking down a burger or whatever. And don’t get me started on the fools going the exact speed limit or 5-10 under in the left lane while 50 cars are behind them Flashing to pass and honking. All while driving right past signs saying Left Lane for passing only. ?

 

[Mach1E]

Please outline a reasonable, legal, scenario where that would ever be an issue. Every V&T law that I am aware of prohibits exceeding the speed limit even in passing situations. Not to put too fine a point on it, but driving the way you describe here is both illegal and being an a**hole.

Anywhere there isn’t a speed limit. That includes public roads, private roads and racetracks.

Are you honestly suggesting performance cars should be slower due to speed limits or are you just being argumentative?

 

[buzznwood]

I’ll just leave it at this; Here in Texas we have speed limits up to 85mph on the toll roads and 75mph on the Interstates. Hell, there are 2 lane country roads that are 75mph. On the tolls I’ll go 95-100mph on the reg and still move over to the right for cars overtaking me in the left lane. And I’m usually going with the flow or just out ahead to give myself space.
That’s just how we roll here. And when you get close to Houston or Dallas be ready for things. ?

The fastest way to pass safely is to pass quickly when all is clear. The fastest way to pass quickly is to achieve higher speeds rapidly. It doesn’t mean drive like an ass though.

I’m much less of a threat to the driving public than Joe or Jane Blow staring at their screen or phone or sucking down a burger or whatever. And don’t get me started on the fools going the exact speed limit or 5-10 under in the left lane while 50 cars are behind them Flashing to pass and honking. All while driving right past signs saying Left Lane for passing only. ?

Just keeping up with the flow of traffic can have most people traveling above the speed limit, passing as quick as possible and then moving over and slowing back down to whatever cruising speed you where at before is the easiest way of not getting caught up in some ones else road rage due to you holding them up, and while the lane discipline is pretty no existent on the west coast it doesn't really matter as people can legally pass in either lane and typically the right lane moves faster as it remains empty due to everyone clogging up the left due to the lack of lane discipline ?

A vehicle that has inconsistent and temperamental performance because you happen to have briefly pushed the go pedal one to many times is not one that inspires driver confidence having a small over boost of power is fine if the boost power delta is relatively small to not really be much of an issue when lost with the GTPE that delta is not small.

Sponsored