Hybrid Battery Seemed to Stop Working on Drive Home Today

[PeterinJapan]

I wanted the Hybrid, but decide to get the 2.5 instead because I'll be adding a camper to the truck. Glad I went with that option.

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[heady]

I wanted the Hybrid, but decide to get the 2.5 instead because I'll be adding a camper to the truck. Glad I went with that option.

The 2.5 is the hybrid engine. The 2.0 doesn't offer any more towing capacity, make sure you got the 4k towing package as the 2.0 needs additional engine cooling via an upsized radiator, where the 2.5 doesn't, for the 4k rating. Change the fluid in the 8F35 transmission on the severe service schedule and you should have many happy years with any luck!

edit: I see your profile says have the Lobo, so only 2k towing, nevermind then, you'll be fine at those ratings, I'd still change the fluid in your trans on the severe service schedule if lots of towing/hauling/camping though

 

[The Real Maverick]

The HVB has a temp set point which routes the battery coolant through a heat exchanger which is cooled using the AC refrigerant (when the lower portion of the radiator cannot cool the battery coolant to that set point normally about 95°F-106°F). I believe the Transaxle fluid also has its separate area within this exchanger.

Here the thing about "AI".
It does not cite sources (usually).
Above it is basically quoting me.

If the Maverick Battery Temperature is only talked about here, on MTC by one guy, that is what it retweets. Also, AI is biased. It tells you what you want to hear.

Ask "are windmills good for the environment?" And it will reply "Yes, windmills are good for the environment because of A B and C."

Ask "are windmills BAD for the environment?" And it will reply "Yes, windmills are bad for the environment because of A B and C."

And in either case, AI regurgitates prevailing "opinions". Not facts. It's not vetted.

AI is an infant. A mockingbird. So far I think worse, not better than traditional search engines.

I'd only use AI for things like math.
Like "how many milliliters are in a gallon?" Or "convert dollars to pounds".

Thanks for reading this PSA.

 

[heady]

I'm probably going to change my PTU and RDU fluid today, I'll see if the HV battery cooler is present or not while I'm under there and try to get a picture of it. Depending on the flow design, even if present, it might not be designed to handle 100% of the low temperature coolant loops heat load, so it may still send the fluid to the low temp radiator up front, which would realistically limit the minimum coolant temperature to the ambient temperature as a minimum, which would explain the battery derating in high temps even with the presence of a AC piped cooler.

 

[Darryl]

I'm at work. And I just checked the electric powertrain section of our workshop manual. It says that the upper temperature limit for the high voltage battery is 140F. But performance starts to be affected at around 120F. And it seeks to maintain the temperature between 50F and 95F. So based on the operating conditions and ambient temperature you mentioned, I'd say that what you experienced is completely normal

 

[Darryl]

Here the thing about "AI".
It does not cite sources (usually).
Above it is basically quoting me.

If the Maverick Battery Temperature is only talked about here, on MTC by one guy, that is what it retweets. Also, AI is biased. It tells you what you want to hear.

Ask "are windmills good for the environment?" And it will reply "Yes, windmills are good for the environment because of A B and C."

Ask "are windmills BAD for the environment?" And it will reply "Yes, windmills are bad for the environment because of A B and C."

And in either case, AI regurgitates prevailing "opinions". Not facts. It's not vetted.

AI is an infant. A mockingbird. So far I think worse, not better than traditional search engines.

I'd only use AI for things like math.
Like "how many milliliters are in a gallon?" Or "convert dollars to pounds".

Thanks for reading this PSA.

Per our Ford workshop manual, the AC is only used to aid in cooling the system in plug in hybrids. The regular hybrid uses only the low temperature cooling system.

 

[The Real Maverick]

Per our Ford workshop manual, the AC is only used to aid in cooling the system in plug in hybrids. The regular hybrid uses only the low temperature cooling system.

Possible. Even likely.

But some MAVERICK HYBRID workshop manuals show a zone valve and an A/C heat exchanger.

I'm wondering if the manual was printed pre-production and the mass produced Mavericks never got that feature.

So a physical examination with photos is absolutely needed in this case.

 

[Glen Baker LLC]

Here the thing about "AI".
It does not cite sources (usually).
Above it is basically quoting me.

If the Maverick Battery Temperature is only talked about here, on MTC by one guy, that is what it retweets. Also, AI is biased. It tells you what you want to hear.

Ask "are windmills good for the environment?" And it will reply "Yes, windmills are good for the environment because of A B and C."

Ask "are windmills BAD for the environment?" And it will reply "Yes, windmills are bad for the environment because of A B and C."

And in either case, AI regurgitates prevailing "opinions". Not facts. It's not vetted.

AI is an infant. A mockingbird. So far I think worse, not better than traditional search engines.

I'd only use AI for things like math.
Like "how many milliliters are in a gallon?" Or "convert dollars to pounds".

Thanks for reading this PSA.

Hell NASA is using AI. NASA has even partnered with Google Technologies for AI since 2017.
AI collect hopefully related sources, which is actually keyed at the bottom of the statements.
At this point in time AI is not the end all be all, but it's on its it's way.
https://www.captechu.edu/blog/how-nasa-is-using-and-advancing-ai-on-earth-and-in-space-exploration

That AI stuff will never catch on I guess someone should tell NASA.

 

[Darryl]

Possible. Even likely.

But some MAVERICK HYBRID workshop manuals show a zone valve and an A/C heat exchanger.

I'm wondering if the manual was printed pre-production and the mass produced Mavericks never got that feature.

Probably pre production or also used for the Escape. I'm speaking of the online workshop manual from Ford's professional technician site that we use to repair at Ford and Lincoln dealerships. I also looked under my Maverick and there is no overlap between the high voltage system and the AC. Not is there in the illustrated components section of the workshop manual. It could have been an early error in the online manuals that Ford corrected later. That happens sometimes. In fact they ask us to report any errors that we discover

 

[The Real Maverick]

I have been looking (using OBDII Scan Gauge) for the HV battery coolant to drop below ambient (indication of chilling) and it never does. So.....

A) is mine defective?
B) is the on trigger higher than 120°F?
C) is there no chiller on a 2022 Hybrid Mav?

Until Recently I was:

A - 60% probable
B - 20% probable
C - 20% probable

Now... on second thought, no codes, warnings, or reduced performance ever....
more like....

A - 10%
B - 10%
C - 80% but I gotta see it with my eyes or in a clear photo from someone.



Edit: Well later down in this thread Darryl confirmed my hunch. There's no A/C refrigerant used to cool the hybrid battery.

 

[MakinDoForNow]

I'm at work. And I just checked the electric powertrain section of our workshop manual. It says that the upper temperature limit for the high voltage battery is 140F. But performance starts to be affected at around 120F. And it seeks to maintain the temperature between 50F and 95F. So based on the operating conditions and ambient temperature you mentioned, I'd say that what you experienced is completely normal

The 140°F was arrived at by a university lithium ion study which determined thermal runaway was initiated in the study at approx 178°F. The grads/testers couldn't bring themselves to test higher than 150°F or so they decided 140°F was safety margen... The rate of charge/discharge was increasing as the temperature was increasing but the battery was starting to soften.

 

[MakinDoForNow]

Probably pre production or also used for the Escape. I'm speaking of the online workshop manual from Ford's professional technician site that we use to repair at Ford and Lincoln dealerships. I also looked under my Maverick and there is no overlap between the high voltage system and the AC. Not is there in the illustrated components section of the workshop manual. It could have been an early error in the online manuals that Ford corrected later. That happens sometimes. In fact they ask us to report any errors that we discover

There was a post early on which showed the exchanger on a drawing. So I will vote for the elimination of it.

 

[The Real Maverick]

EV racing:

They like to have the batteries about 140°F for maximum output. Shortens battery life,
But races are short and hundredths of a second count.

 

[Darryl]

EV racing:

They like to have the batteries about 140°F for maximum output. Shortens battery life,
But races are short and hundredths of a second count.

People who race often aren't as concerned about longevity as they are about winning . But Ford needs this battery to last at least 100,000 miles and 8 years just to prevent warranty costs. And they need it to last a lot longer to keep a good reputation and get repeat buyers.

 

[Darryl]

I have been looking (using OBDII Scan Gauge) for the HV battery coolant to drop below ambient (indication of chilling) and it never does. So.....

A) is mine defective?
B) is the on trigger higher than 120°F?
C) is there no chiller on a 2022 Hybrid Mav?

Until Recently I was:

A - 60% probable
B - 20% probable
C - 20% probable

Now I feel:

A - 20%
B - 20%
C - 60%

Naw... on second thought, no codes, warnings, or reduced performance ever....
more like....

A - 10%
B - 10%
C - 80% but I gotta see it with my eyes or in a clear photo from someone.

No chiller in our online repair manual from Ford . AC system also only shows the lines running to compressor, condenser, and evaporator. . On cars with a chiller it shows us how to remove and replace it . Nothing in the manual mentions or shows it because it's not there

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