Looking at MME LIN BUS - 12V BMS Intelligent Battery Sensor
louibluey
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Example of MME discharging LVB from 100%, and a remote start (DC/DC did come on in this one example at 14F)
I made a record from Jan 22 about 3:30pm to Jan 23 about 4pm. I pulled it just after a remote start (not a scheduled departure) yesterday. Mostly I wanted a first look (for me) at what happens during a remote pre-start.
But, it turns out the entire record is really interesting, because it catches an example where LVB started out fully charged at 100% soc, and then MME takes it down to about 69% over the period.
Hey Ford! What's with that? Why does MME discharge the LVB over tens of hours? Maybe it is loads like fluid circulation pumps coming on to heat and/or to equalize temps (e.g. the sounds we hear). Maybe they intended to LVB to cycle over a 24 hour period?
The blue 0.4V dips are MME coming on, probably Pony lights and all, unclear why.
This cold weather remote start (about 14F) did run the DC/DC converter, so there was some modest LVB charging. The first graphs are the 24 hour period, below that graphs for the right side of the 24 hr record, the remote start yesterday afternoon.
Overall record about 24 hours
REMOTE Start (right side of graph above)
remote prestart/precondition (but, not a departure time start)
Power curve from dedicated sense energy graph for the remote start, chargepoint flex 11 kW 48A
L2 Power info
3:46:35 497W begin, first small step
3:47:21 peak 9716W
3:47:26 just after first peak 8574W
3:54:03 end of that first curve 6818W
3:57:31 bottom of second dip 4430W
4:01:37 end
Here is the earlier event from 12:38:38 to 12:42:42. I don't remember this one, I think it was just MME doing its own thing and taking a sip of L2.
I made a record from Jan 22 about 3:30pm to Jan 23 about 4pm. I pulled it just after a remote start (not a scheduled departure) yesterday. Mostly I wanted a first look (for me) at what happens during a remote pre-start.
But, it turns out the entire record is really interesting, because it catches an example where LVB started out fully charged at 100% soc, and then MME takes it down to about 69% over the period.
Hey Ford! What's with that? Why does MME discharge the LVB over tens of hours? Maybe it is loads like fluid circulation pumps coming on to heat and/or to equalize temps (e.g. the sounds we hear). Maybe they intended to LVB to cycle over a 24 hour period?
The blue 0.4V dips are MME coming on, probably Pony lights and all, unclear why.
This cold weather remote start (about 14F) did run the DC/DC converter, so there was some modest LVB charging. The first graphs are the 24 hour period, below that graphs for the right side of the 24 hr record, the remote start yesterday afternoon.
Overall record about 24 hours
REMOTE Start (right side of graph above)
remote prestart/precondition (but, not a departure time start)
Power curve from dedicated sense energy graph for the remote start, chargepoint flex 11 kW 48A
L2 Power info
3:46:35 497W begin, first small step
3:47:21 peak 9716W
3:47:26 just after first peak 8574W
3:54:03 end of that first curve 6818W
3:57:31 bottom of second dip 4430W
4:01:37 end
Here is the earlier event from 12:38:38 to 12:42:42. I don't remember this one, I think it was just MME doing its own thing and taking a sip of L2.
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