Powerboost 12v battery charging tip

[Snakebitten]

The Powerboost only rarely ever uses the traditional ICE bendix/flywheel starter to start the ICE. (I think it is used in only 1 of 4 circumstances that Ford lists for starting ICE)

Instead it uses the Belt Driven Starter.

I'll see if I can find Ford's comment regarding.

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[Snakebitten]

Keep in mind that NEITHER starter is needed if the vehicle is cruising in EV mode and needs to engage ICE. The clutch dedicated to the traction motor/torque converter can spin the crankshaft effortlessly.

But otherwise, the BISG Belt Integrated Starter Generator will be the preferred method for spinning the crank at a dead stop or rolling start.

Still looking for the paragraph that lists 4 starting conditions, where only one condition would require the traditional flywheel starter.

 

[Snakebitten]

Note Ford refers to it as a "Belt Integrated Starter" only, in this documentation.

In multiple vehicles Ford uses the similar approach and calls the device Belt Integrated starter/generator. I do NOT believe the component is used/leveraged identically on every vehicle model.

 

[turbopilot]

 

[Snakebitten]

Yep, that'd be it.

I'll shut up for a while after this last mention of starters and their role:

 

[turbopilot]

Yep, that'd be it.

I'll shut up for a while after this last mention of starters and their role:

Keep it coming. I am learning a lot. Just beginning to understand this machine.

I am see a different charging behavior in my PB. It is a 2023 with a blend date of 5/5/23. Here is the background. Last week I got one of those messages that the truck was going to sleep in FordPass.

I then put the battery on trickle charge overnight and finally got OBDLink working again with the new PB. OBDLink now showed 12 volt battery at 100% SOC after overnight charging. Since that time I have made my normal circuit of daily 8 to 9 mile trips daily. SOC each morning is around 99%. Every day now I am seeing battery voltages around 12.7 in normal driving in "Auto" mode on the air conditioning system. If I set the blower above 5 then I see between 13.8 and 14.0 volts. But more importantly the SOC is staying at 100% during all the driving. It does appear that the system is trying to maintain 100% SOC for the battery while driving.

 

[imnuts]

I've seen it many times, but there's nothing in the service manual stating the electric motor is ever used to start the engine. I'm sure it technically could, but it's either the traditional starter or BISG.

I can only think of one way the hybrid motor could start the engine without harshness. If the electric motor was decoupled from the transmission output, then stopped, connected to the engine and slowly turned over it wouldn't be bad. I feel like if you tried to bring the engine up to speed from stopped otherwise, it would either put a lot of wear on the torque converter or be like you missed a shift in a manual transmission vehicle.

 

[Snakebitten]

Yeah, I don't know where I THOUGHT I saw something where a clutch between the input shaft and the crankshaft could spin up the motor.... Or something like that. Maybe I misunderstood. But it sure seems like the wheels turning, the driveshaft spinning, and the transmission maintaining drive/momentum, that somehow that could be harnessed into turning the crankshaft no differently than the BISG. Afterall, as soon as the motor comes to life, it has to be paired with an already spinning transmission.

 

[Handle]

 

[imnuts]

I've seen that graphic before, but does anyone know where it came from? I've gone through the service manual a few times looking for it and it isn't there. In the starting conditions/methods section that @Snakebitten posted previously here, that method also isn't listed as a possibility.

 

[Samson16]

Note Ford refers to it as a "Belt Integrated Starter" only, in this documentation.

In multiple vehicles Ford uses the similar approach and calls the device Belt Integrated starter/generator. I do NOT believe the component is used/leveraged identically on every vehicle model.

Keep it coming Snake!

Interesting that in Ford's own modifiers guide it calls the battery to BISG connection the "Charging System" when it may or may not actually charge anything.

 

[Snakebitten]

Keep it coming Snake!

Interesting that in Ford's own modifiers guide it calls the battery to BISG connection the "Charging System" when it may or may not actually charge anything.

I have searched diligently through every PID (>1500 of them) for something that monitors or measure current to/from that BIS

Notice I took the liberty to drop the G?

 

[Samson16]

I have searched diligently through every PID (>1500 of them) for something that monitors or measure current to/from that BIS

Notice I took the liberty to drop the G?

G dropped until further notice.

For a PID to be anything more than a deduction or guess, there needs to be a physical data gathering sensor involved. I see a Battery Monitoring Sensor attached to the positive and negative posts of the Main battery and a Battery Current Sensor looped around the ground wire for the Aux battery negative post. The DC/DC CCM likely has internal test points but the Battery Junction Box with the fuses seems to be blind. If the DC/DC is doing all the battery charging then the Auxiliary Battery Isolator is passing all of the Main Bat charging current. Perhaps there is more going on in there besides a relay?

There was also something interesting in your post regarding the vehicle unable to start or function without the HVB voltage. Something to do with the electric motor needing to keep up with the engine. I tried to copy it but couldn't. I find that interesting after all the trouble gone through to provide 3 separate methods of starting the ICE.

 

[Snakebitten]

I'm guessing that the Powerboost is configured where it has to be a functional Hybrid in order for the ICE drivetrain to work properly?

At least software wise it doesn't have code that will let it just be an Ecoboost.

It might barely be a Hybrid. But it IS one. ?

 

[Samson16]

I'm guessing that the Powerboost is configured where it has to be a functional Hybrid in order for the ICE drivetrain to work properly?

At least software wise it doesn't have code that will let it just be an Ecoboost.

It might barely be a Hybrid. But it IS one. ?

Ok. I thought perhaps with the traction motor clutch, AGM, flywheel starter, and BIS(G) it could start and operate on ICE alone until repairs are made. Perhaps not and it's using the AGM and flywheel starter to protect the HVB but never to replace it.

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