12v battery monitor display12/7/2023 ![]() ![]() I might add there have been numerous 12V battery failures associated with Bluelink services where the car will not go to sleep and thus interferes with the auto recharge cycle. Both models should be using the method described in this Hyundai patent I can't vision too much difference in the charging pattern between Ionic 5 and Kona EV, except if the software version is changed. It has been found that if the HV pack is less than 40% SOC, no charging of the 12V battery occurs as well. It would be easier to distinguish drive spikes from those automatic programed charge spikes( on Kona EV it recharges for about 20 minutes after a short drive, reoccur about 2 hours later- using newer LVDC software version: then settles into a 4 hour cycle similar to the original version), they also may occur when recharging the HV battery as well. Thanks for the above info, it might provide more details if the time range is set for 24 hour intervals. I'm still happy with the car in spite of the strange battery problem and the burning odor I still experience when I start it in the morning after it has sat for a few days.Ĭlick to expand.The 12V sag is the BMS reading the cell open circuit voltages. So far I have not seen a repetition of the battery going dead like it did in my original post. I have not taken any long trips, so I don't know whether the voltage would have stayed at about 14 volts or would have dropped back down. I'm not sure what the small negative spikes are. I think some, but not all, of the other spikes also represent trips. It looks like each time I take a trip, the battery charges at a voltage of about 14.7 volts. ![]() The three periods indicated by the horizontal white lines represent three days when I made the same 3 short trips during the day. The voltage goes up to about 14.7 volts and then gradually decays down to about 12.7 volts. The image below shows the voltage over a 15 day period. My BM2 has been monitoring the battery for a couple of weeks now. On July 16 I posted a new thread on problems I had when the 12 volt battery died.Įlectriceddy suggested that I install a BM2 battery monitor and report back. ![]()
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