Ford BMS oddities with AGM battery

[meep]

“What strange magic is this?!”

 

[KJSmith]

I just got home from an Acura dealership.
As a couple of Techs were changing the oil on my wife's car, I was chatting with a lead tech and the Service director.

They say Acura/Honda targets 85% charged as the goal.
IIRC, That Ford engineer said Ford targets 80%.

From what I have read, AGM batteries accept higher rate of charge below the 80% charged....then you have to charge at a lower/slower rate from 80% up.

The Acura Tech was very knowledgeable on their system.... as he should be.
He said they manipulate a/c clutch, a/c fan speed ect. based on state of charge and air entering the radiator.

It can get very deep quickly.

 

[meep]

I just got home from an Acura dealership.
As a couple of Techs were changing the oil on my wife's car, I was chatting with a lead tech and the Service director.

They say Acura/Honda targets 85% charged as the goal.
IIRC, That Ford engineer said Ford targets 80%.

From what I have read, AGM batteries accept higher rate of charge below the 80% charged....then you have to charge at a lower/slower rate from 80% up.

The Acura Tech was very knowledgeable on their system.... as he should be.
He said they manipulate a/c clutch, a/c fan speed ect. based on state of charge and air entering the radiator.

It can get very deep quickly.

Indeed. I had saved a testimony somewhere from an engineer at ford that they achieve more MPG savings from deep BMS than auto s/s.

 

[MParr]

I end up flashing 5 times, hitting the brake 5 times....
Then wait for the battery light to blink 3 times.

If you want to be extra cautious, do that and then let your vehicle sit untouched for 8 hrs,

Yes, the light will blink 3 times and go out.

 

[KJSmith]

Indeed. I had saved a testimony somewhere from an engineer at ford that they achieve more MPG savings from deep BMS than auto s/s.

I mentioned that to the Acura Tech.
He confirmed that was true for them also.