12v Battery Charge Limits

[JDaleo]

My 2022 very rarely goes above 60% charged, and i've been trying to install 6.8.0, but it keeps failing (I am assuming due to 12v battery charge status, because every other condition should be good).

I decided to hook the truck up to a battery charger, and connected the negative terminal after the BMS. It charged up to 60% (confirmed with both HA feed and FORScan) then stopped. When I connected it directly to the battery, it started charging again at full speed. I checked the limit in FORScan and it was set to 80%. I bumped it up to 90% but that doesn't seem to have done anything. I could see that FORScan knew it was a "conventional charger", and i'm wondering if the BMS for some reason is limiting that type of charge, when the truck is not running?

The battery was replaced less than a year ago and the BMS was reset at that time. I'm wondering if maybe tonight I should charge directly to the battery and let it sit overnight, hoping the BMS relearns something without doing a reset?

Thoughts?

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[Texas2022XLT]

Yes I’d charge your battery over night. I had to do this a few weeks ago to get 6.5 to install. Really sucks we have to go through all this trouble to get updates to install. Also reset the BMS after changing.

 

[Spidergears]

if you charge without the bms, let the truck sit undisturbed for like 8 hours. It should learn the new soc.

If you reset the bms, it will reset the battery age as well. So typically you only do that when putting in a new battery.

 

[JDaleo]

Alright, I'll try that. I'll throw it on the charger until it's full, then disconnect everything and let it sit till tomorrow and see what it reports.

 

[PB2021]

I wonder if you could have an issue with your BMS. I always charge behind the BMS so it sees the charge occurring and achieve a full charge without issue.

 

[JDaleo]

I wonder if you could have an issue with your BMS. I always charge behind the BMS so it sees the charge occurring and achieve a full charge without issue.

That's what i'm thinking too. I went directly to battery last night after driving 2+ hours until it was charged. BMS stated I was at 59% when it was done, and down to 44% this morning.

 

[JDaleo]

Truck went to deep sleep yesterday around 3pm.. I guess charging it didn't work.. Have an appt with ford today, going to bring it up.

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