Can’t keep it up (alt output voltage)

[brkdncr]

My Ecoflow battery dc-dc alt charger shuts down at a specific voltage, but the battery system seems to keep the voltage low much of the time. For example, it settles to 12.6v on a long drive in the freeway. That about the same charge as the battery when not running.

is there a way to keep the voltage a little higher?

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[ducksface]

If you're charging a lithium battery the bms decides what voltage.
Does your battery say 12.6 on it?
Is it Bluetooth?

 

[brkdncr]

If you're charging a lithium battery the bms decides what voltage.
Does your battery say 12.6 on it?
Is it Bluetooth?

I need the alt output voltage to stay above the resting voltage of the battery when the vehicle is running.

the dc inverter voltage reading isn’t really important.

 

[Ukko Wildtrak]

Yes, you can force the BMS to output more, but the tradeoff is that the truck shuts off all the unnecessary modules when not running. This is because the BMS thinks that it never reaches a full state of charge.

I've been running like this for the last 12 to 15 months with no issues. You're basically telling the computer that it has a bigger battery than it actually does and that it should try to maintain a higher state of charge than normal, so it's always trying to charge at a higher rate instead of going down into an eco mode for charging. Here's the stock and two different setups you can try on BCM 726-04-01

Stock (H6 / 80% SoC): 0101 - 0050 - 00XX
Sustained high voltage (Stock H6 Battery / 95% SoC): 0101 - 005F - 00XX
Sustained high voltage and higher current capacity (Upgraded H7 Battery / 95% SoC): 0201 - 005F - 00XX

 

[MoePort]

I use the Ecoflow charger as well and have just changed the start voltage on the Ecoflow to 12.5v when I need it to fire up.

Firing up the A/C to max also brings the alternator to around 13.5v.

 

[brkdncr]

Yes, you can force the BMS to output more, but the tradeoff is that the truck shuts off all the unnecessary modules when not running. This is because the BMS thinks that it never reaches a full state of charge.

I've been running like this for the last 12 to 15 months with no issues. You're basically telling the computer that it has a bigger battery than it actually does and that it should try to maintain a higher state of charge than normal, so it's always trying to charge at a higher rate instead of going down into an eco mode for charging. Here's the stock and two different setups you can try on BCM 726-04-01

Stock (H6 / 80% SoC): 0101 - 0050 - 00XX
Sustained high voltage (Stock H6 Battery / 95% SoC): 0101 - 005F - 00XX
Sustained high voltage and higher current capacity (Upgraded H7 Battery / 95% SoC): 0201 - 005F - 00XX

Great!

Is the h7 battery the one that comes with the aux switch package?

 

[brkdncr]

I use the Ecoflow charger as well and have just changed the start voltage on the Ecoflow to 12.5v when I need it to fire up.

Firing up the A/C to max also brings the alternator to around 13.5v.

doesn’t it drain your battery down when you shut off the vehicle?

 

[Brian_B]

doesn’t it drain your battery down when you shut off the vehicle?

I'm not certain, but I imagine the EcoFlow is using the low voltage as a signal that the vehicle is shut off, and then it turns off.

Problem is, the Ford BMS, at some times, will turn the alternator off even with the engine running. You've also got ASS in there that will stop the alternator too. I've never seen it stop for too long, as there are still a lot of electric loads in a running Bronco that normally drain it, but maybe if you had an awesome battery and a long, flat straightaway piece of road?

Now - I would think, you would want the Ecoflow to stop in those conditions, and just let it do what it's gonna do. It shouldn't hurt anything, because all it's doing is topping off a Lithium battery bank somewhere, and if you have loads running, they are running from that battery, not directly off the DC-DC charger.

 

[MoePort]

doesn’t it drain your battery down when you shut off the vehicle?

Not if you change it back to over 13v before you shut down.

I only change the voltage in rare cases where the Bronco BMS has dropped voltage to under 13v and I need to charge the Delta Pro. Otherwise, it leave the starting charge voltage at 13v.

 

[MoePort]

I'm not certain, but I imagine the EcoFlow is using the low voltage as a signal that the vehicle is shut off, and then it turns off.

You can set it to start charging at a particular voltage. There is also a shutoff timer you can set if you wish to have the charger turn off after a certain period of inactivity.

 

[BigMeatsBronco]

Also in forscan easy menu you can change the battery max rate of charge, stock its 80%, I have mine set to 95% and it often says 15 volts while driving. Before it would only do 13.9-14.2 while driving.

 

[EOD98]

Also in forscan easy menu you can change the battery max rate of charge, stock its 80%, I have mine set to 95% and it often says 15 volts while driving. Before it would only do 13.9-14.2 while driving.

Thanks for this info! I had no idea this was an option to change. Exactly what I needed! Set mine to 95% as well.

 

[brkdncr]

I'm not certain, but I imagine the EcoFlow is using the low voltage as a signal that the vehicle is shut off, and then it turns off.

Problem is, the Ford BMS, at some times, will turn the alternator off even with the engine running. You've also got ASS in there that will stop the alternator too. I've never seen it stop for too long, as there are still a lot of electric loads in a running Bronco that normally drain it, but maybe if you had an awesome battery and a long, flat straightaway piece of road?

Now - I would think, you would want the Ecoflow to stop in those conditions, and just let it do what it's gonna do. It shouldn't hurt anything, because all it's doing is topping off a Lithium battery bank somewhere, and if you have loads running, they are running from that battery, not directly off the DC-DC charger.

Yes it's using low voltage to signal shutdown. The problem was that I did a 1.5hr drive and it sat under 13v nearly the whole time. Granted, it was a new battery that may have had nearly 100% SoC, and it was over 108* out, so it's quite possible the BMS decided to just float the battery at 12.6v for whatever reason.

I think you're right and I'm overthinking it. If i get to my destination and it's not as chaged as i need it to be, i can simply set it to pull the full 800w for a few mintues. it's unfortunate that the ecoflow doesn't have a signal wire that can be used to deal with aggressive BMS'.

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