What battery does what?

[Prickly Pear]

Been doing some searching and can't find a definitive answer. Is there a thread that explains how the power is distributed between the 12V and high voltage batteries on a hybrid? Does the traction motor battery take over some of the heavy lifting with the 12 volt circuit (heated seats, lights, inverter, etc.) or does the little battery and charging mechanism handle it all. And speaking of charging, is there only one generator that feeds both batteries or is there a separate one for each battery.

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[BlueSpec1]

Not sure about one thread that explains it.

High Voltage Battery is charged by MG1 from the eCVT and MG2 in eCVT on Regenerative braking.

The 12V is from the DC/DC converter that runs off the High Voltage Battery and supplies the 12V Battery & 12V Loads.

414-05 Voltage Converter/Inverter Description and Operation
2023 - 2024 Maverick

Component Description.

DC/DC - The DC/DC is responsible for maintaining and charging the 12-volt battery, it communicates on the HS-CAN1 .

ISC / SOBDMC - The ISC/ SOBDMC provides a wake up signal to the DC/DC during key on.

PCM - The PCM communicates on the HS-CAN1 and determines the ambient air temperature, enables and sets the low voltage charging setpoint, determines power pack status and transaxle gear state.

BECM - The BECM communicates on the HS-CAN1, determines the high voltage battery current flow, commands the high voltage contactors and monitors system shutdown status.

BCM - The BCM communicates on the HS-CAN1, determines the ignition state, communicates the power mode state and measures the 12-volt battery voltage with the battery sensor.

DC/DC Operation.

The DC/DC steps the high-voltage down to a low-voltage (between 13.0 and 15.5 volts, depending on vehicle needs), providing power to the vehicle low-voltage battery systems.
Depending on the vehicle and environmental conditions, the DCDC is capable of outputting up to 265 amps to the 12-volt battery.

The DC/DC is protected by a 50 amp high voltage low current fuse located in the high-voltage BJB .

The DC/DC is liquid cooled by the electric motor cooling system circuit. The electric motor cooling circuit uses an electric motor diverter valve that acts as a system thermostat, allowing the coolant to flow within the motor circuit while the motor warms. As the coolant warms, the diverter valve slowly opens to allow coolant flow to the radiator.

 

[Prickly Pear]

Thanks - I'll have to digest that a little but it gets me started on the path to understanding.

 

[The Real Maverick]

Thanks - I'll have to digest that a little but it gets me started on the path to understanding.

The short version is:

The 12v battery supplies the only power when the key / truck is set to off.

The 12v battery "turns on" the high voltage battery.

The HV battery powers everything when the truck is on / running. The 12v battery will be "trickle charged" from the HV battery.

 

[Prickly Pear]

Thanks - way more digestible ;-)

 

[ZABSMAV]

The short version is:

The 12v battery supplies the only power when the key / truck is set to off.

The 12v battery "turns on" the high voltage battery.

The HV battery powers everything when the truck is on / running. The 12v battery will be "trickle charged" from the HV battery.

More accurately it "should" be charging the 12v DC battery. But alas, It does not properly charge it, thus we are all getting the Deep Sleep notification.

 

[CurtisB]

Not sure about one thread that explains it.

High Voltage Battery is charged by MG1 from the eCVT and MG2 in eCVT on Regenerative braking.

The 12V is from the DC/DC converter that runs off the High Voltage Battery and supplies the 12V Battery & 12V Loads.

414-05 Voltage Converter/Inverter Description and Operation
2023 - 2024 Maverick

Component Description.

DC/DC - The DC/DC is responsible for maintaining and charging the 12-volt battery, it communicates on the HS-CAN1 .

ISC / SOBDMC - The ISC/ SOBDMC provides a wake up signal to the DC/DC during key on.

PCM - The PCM communicates on the HS-CAN1 and determines the ambient air temperature, enables and sets the low voltage charging setpoint, determines power pack status and transaxle gear state.

BECM - The BECM communicates on the HS-CAN1, determines the high voltage battery current flow, commands the high voltage contactors and monitors system shutdown status.

BCM - The BCM communicates on the HS-CAN1, determines the ignition state, communicates the power mode state and measures the 12-volt battery voltage with the battery sensor.

DC/DC Operation.

The DC/DC steps the high-voltage down to a low-voltage (between 13.0 and 15.5 volts, depending on vehicle needs), providing power to the vehicle low-voltage battery systems.
Depending on the vehicle and environmental conditions, the DCDC is capable of outputting up to 265 amps to the 12-volt battery.

The DC/DC is protected by a 50 amp high voltage low current fuse located in the high-voltage BJB .

The DC/DC is liquid cooled by the electric motor cooling system circuit. The electric motor cooling circuit uses an electric motor diverter valve that acts as a system thermostat, allowing the coolant to flow within the motor circuit while the motor warms. As the coolant warms, the diverter valve slowly opens to allow coolant flow to the radiator.

You nailed it BlueSpec1. Saved us a lot of explaining!!

 

[Ozarkbeard]

...we are all getting the Deep Sleep notification.

Not all.

 

[ZABSMAV]

Not all.

Do you use the FordPass app?

 

[Timothyd]

More accurately it "should" be charging the 12v DC battery. But alas, It does not properly charge it, thus we are all getting the Deep Sleep notification.

Not all of us.

 

[ZABSMAV]

Not all of us.

There are two types of Maverick hybrid owners. Those who are having deep sleep battery issues and those who don't tell the truth about having the issue.

 

[Timothyd]

There are two types of Maverick hybrid owners. Those who are having deep sleep battery issues and those who don't tell the truth about having the issue.

Sorry, no issues. I deeply apologize.

 

[Scott Asheville]

What's really ironic is that you can go to most BEV forums and they ask the same question.

 

[JacobEleventeen]

So then the deep sleep issue is due to the "ford app" stuff that stays running when the car is off? I'm a little confused on how that would be any different than the ecoboost version unless the alternator on the ecoboost does more charging than the hybrid battery does.

 

[JacobEleventeen]

I almost wonder if they could somehow program the hybrid battery to stay on a little longer after the truck is turned off to top off the 12v. Although I could see that being a safety issue as well. The only other option would be to increase the amps on the DC-DC converter so that you always have a full battery once the truck is shut off.

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