Hybrid 12 Volt Battery Crazy Findings

[rslilly76]

All these so called or claimed fixes forum members do and talk about as far as I can tell have fixed nothing.

You don't even have a Hybrid cause they are so scary, remember? Why would you come talk trash about forum fixes when it doesn't even pertain to you?

And actually the charging scheme does actually address batteries prematurely failing, but maybe you didn't understand that?

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[BAScott62]

While the power draws may be different between the trim levels, the charging strategies Ford appears to be using seem to be the same

 

[nbmav]

I never had any sleep mode notifications with my '25 hybrid Lariat. I figured it was due to my 4 day/week 70 mile round trip commute which was 95% highway speeds 70-80. I do have the headlights set on auto all the time which I think has DRL's? Not sure if that is enough to kick it into 100% charge mode.

I finally did recently get a sleep mode notification but that was after the truck had been totaled almost 2 months prior and had not been run at all for that time.

 

[samspritzer]

so you're incapable of testing to see if yours does the same? Lol

the features aren't going to change their charging scheme

I am a retired auditor and computer programmer. Both have given me a wealth of experience in what to look for and what to test. Both have had their share of "gotchas!". Yesterday's vehicles...the ones we grew up with were purely mechanical; todays are more programmatic. With the latter being deep inside the bowels of chips, there is literally no way of looking there. If Ford doesn't (and it won't for proprietary reasons) provide me with the computer code for a specific feature including its path among the over 3000 chips that make up a vehicle, I am left with nothing more than assumptions. Thus far, we still don't have a solution and as Cherokee said "have fixed nothing".

 

[rslilly76]

I never had any sleep mode notifications with my '25 hybrid Lariat. I figured it was due to my 4 day/week 70 mile round trip commute which was 95% highway speeds 70-80. I do have the headlights set on auto all the time which I think has DRL's? Not sure if that is enough to kick it into 100% charge mode.

I finally did recently get a sleep mode notification but that was after the truck had been totaled almost 2 months prior and had not been run at all for that time.

I haven't had any sleep mode issues with 25 with 17k miles. No the drls didn't allow it to charge 100%

But it would have been nice to see your readings

 

[BAScott62]

There's nothing wrong with a little Black Box Testing, especially as a hobby.

 

[rslilly76]

I am a retired auditor and computer programmer. Both have given me a wealth of experience in what to look for and what to test. Both have had their share of "gotchas!". Yesterday's vehicles...the ones we grew up with were purely mechanical; todays are more programmatic. With the latter being deep inside the bowels of chips, there is literally no way of looking there. If Ford doesn't (and it won't for proprietary reasons) provide me with the computer code for a specific feature including its path among the over 3000 chips that make up a vehicle, I am left with nothing more than assumptions. Thus far, we still don't have a solution and as Cherokee said "have fixed nothing".

You're claiming different trims will have different charging schemes, but instead of testing it to see you're gonna hide behind all of that you just posted..Got it!

You could easily test and see that yours charges the same exact way, but it's cool we get it, you need Ford to figure it out.

See the key here is if enough people show the same issue with charging, Ford might look into that programming. But it's cool you sit back and just speculate instead of try it yourself.

 

[rslilly76]

There's nothing wrong with a little Black Box Testing, especially as a hobby.

exactly

 

[nbmav]

I haven't had any sleep mode issues with 25 with 17k miles. No the drls didn't allow it to charge 100%

But it would have been nice to see your readings

Mine also had about 17K miles on it when it was totaled.

 

[lm126027]

The Mavbrid is still spooky to me.

My test results will come when my
Motorcraft AGM fails.
It’s 17 months old now and I got 18,500 miles on the Odo, (Odometer)

It lives around 12.2 VDC

I peak it once a month overnight on my Noco Genius 1 @1 amp and reach 12.53 max.
I left it on for three days to desulfate it.
Peak VDC was 12.53

More than a few times I found it at 11.8 VDC before I peaked it.

The weird part, I’ve never had a sleep mode or limited service or battery saver mode anything.

Yep my Ecoboost is not a Hybrid but from what I can see it’s just as much a battery vampire when sitting as the Mavbrid.

No auto manufacturers would have allowed such problems to go this long without solving
10, 20 years ago.

Whu~Tu~Fu~ Ford !
What happened to quality Is Job One ?
Fix this.

have a 2024 Lariat also, mine has with 26,000+ miles and have had 2 cases where the interior lights did not come on, so guessing was in saver mode. I drive quite a bit locally and twice to SC (straight thru, close to 1,000 each way) with a third next week. In winter hauling a trailer to northern ME often to go snowmobiling.

 

[samspritzer]

You're claiming different trims will have different charging schemes, but instead of testing it to see you're gonna hide behind all of that you just posted..Got it!

You could easily test and see that yours charges the same exact way, but it's cool we get it, you need Ford to figure it out.

See the key here is if enough people show the same issue with charging, Ford might look into that programming. But it's cool you sit back and just speculate instead of try it yourself.

I did not say different charging schemes. The charging schemes are triggered by events. Thus far, we've seen what others have observed. But we don't know if that is everything. Only Ford can tell us.
I am going to stop with this post since it isn't really accomplishing anything. Meet me for coffee and cars at the Eastern Hills Mall in Clarence, NY Sunday and we can continue this discussion there.

 

[rslilly76]

I did not say different charging schemes. The charging schemes are triggered by events. Thus far, we've seen what others have observed. But we don't know if that is everything. Only Ford can tell us.
I am going to stop with this post since it isn't really accomplishing anything. Meet me for coffee and cars at the Eastern Hills Mall in Clarence, NY Sunday and we can continue this discussion there.

This whole post was about charging schemes and it prematurely killing batteries. But ok, throw it back on Ford and dismiss your different trim level stuff.

I get it, they need to test everything!
It's possible that the parasitic drains on different trims are higher, so you're right in that since and what they need to test.

But this post was to highlight their retarded charging scheme that's the same across the board 22-25 all trims and both 12v battery types.

And I'm not coming to NY you couldn't pay me enough to go up there. lol

 

[johnDeere]

Nice write up rslilly76
and great background about the system from years back until now.
One thing to note.
There has been issues with the parasitic draw from control modules.
There has been issues with batteries.
But there is a big problem with how Ford decided how to charge the battery.

There is a difference in charging a flooded over a AGM battery.
Flooded like to be charged to 100% and can be charged at 14.8 V all the way down to less than .25amps charging. With our hurting the battery.
AGM batteries are a different story, (check the books on charging a AGM), they do not like to be over charged. That is why they need a smart charger for AGM.
As soon as a AGM battery reaches 14.8 v and charging amp of 1 amp or so charging or less, the charging voltage will drop down to 13.X volts to float charge and not over charge the battery.

I have checked my 23 maverick hybrid XLT with forscan and checked battery chemistry, and changed from flooded to AGM, and back and forth and did not notice any difference in charging voltage no matter what the current was.
I changed the SOC from 80% up to 99% and did not notice any difference.

I did notice when my SOC reached 91% the charging voltage dropped to 12.8V, that is too low for floating voltage.
I was one of the owners that found out last year when you SOC is over 91% and it changes to 12.8V, if you turn the cabin fan over 6 then charging voltage goes back to 14.8 v,
I have not done any testing on the other methods of getting the charging system to change
.
What I have also noticed is the EFB that the mav hybrids have acts similar in charging to the AGM, and need a smart charger to charge them.

I have a wonvon volt/amp meter connected to my battery, so I can see the voltage and current for the 12V battery when the truck is running or when its off.

My SOC on "car scanner" app shows between 50% up to 53%
It has been that way for over 2 months of testing.
After a half hour drive the voltage will be 14.8 and the current will drop to 0 on car scanner app, but can show .5amp on my WonVon meter.

To me and the books, it is charged and should change to floating charge, but it does not.
Floating charge is controlled by the charging system SOC, not what the charging current is.
if your battery is going bad and the SOC is not great, it will keep trying to charging the battery, will never get the SOC up, so it keeps trying.
Ford used EFB since its like AGM where they can recover faster that flooded batteries.

The big problem is when you turn off the mav hybrid, current is still flowing out of the battery, for up to 90 minutes.
And you may be able to recover the draw the next time you drive, or maybe not.

 

[samspritzer]

This whole post was about charging schemes and it prematurely killing batteries. But ok, throw it back on Ford and dismiss your different trim level stuff.

I get it, they need to test everything!
It's possible that the parasitic drains on different trims are higher, so you're right in that since and what they need to test.

But this post was to highlight their retarded charging scheme that's the same across the board 22-25 all trims and both 12v battery types.

And I'm not coming to NY you couldn't pay me enough to go up there. lol

My apologies for misunderstanding the intent of the post and the various charging schemes. I'll admit I am oblivious to the obvious.

 

[rslilly76]

My apologies for misunderstanding the intent of the post and the various charging schemes. I'll admit I am oblivious to the obvious.

Yes I believe we were both on two different trains of thought. My apologies as well

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