Kia Soul EV 2020
If you want to monitor the 12V battery state, you can’t beat one of these things. It logs continuously the Voltage over the last 30 days. You connect your phone/tablet app via Bluetooth LE whenever you want to view the data. The app displays Voltage graphs and you can select any day to view the 24h graph. It only draws 1mA from the battery (negligible, has no effect on anything). Fantastic device. When I get my car (later this week hopefully) one of the first things will be to add this device across the 12V battery terminals! Then I’ll see WTF is going on with it. Highly recommended!Presumably one can measure the voltage of the battery using a multimeter to determine if any intervention is required? This seems simple and low cost and avoids shelling out for any OBD2 gear for those that just want to avoid the 12V battery plague.
An interesting suggestion. If the utility mode really does hold the battery up at ~14.7V constantly, that could certainly be an option worth looking at as it could possibly save the need for ever using an external mains charger. That could be an elegant workaround solution indeed.So would a possible fix be to leave the car in "utility mode" for a few hours when it's first received to ensure the 12V battery is at maximum charge?
Right, well first thanks to those who made 'positive' comments, that's always encouraging.... a depleted SOC battery never really recovers itself properly but once a good charge from a mains charger has been done, things seem to usually remain ok thereafter.
... it completely explains why the car can not recover itself very well from a depleted battery condition ... Could it be that if the battery is heavily depleted in SOC, the 30 minute period is extended? That would make some sense if so.
Why didn’t they simply apply a constant Voltage charging at ~13.8 - 14.2V at all times when the car is operating or plugged in. That would take care of all conditions. The battery would just draw current if it needed it and not if it didn’t. It could be temperature compensated within that range for winter summer variations. That is what Prius does and effectively what most conventional alternator equipped ICE cars do ...
There must be some reason why they did it this crazy way, but I can’t see it. Obviously they are a world class manufacturer and can’t be stupid or lacking in engineering talent. Very bizarre IMHO.
Yes, absolutely. And perhaps even as an alternative to an external charger from the auto parts store.So would a possible fix be to leave the car in "utility mode" for a few hours when it's first received to ensure the 12V battery is at maximum charge?
There was concern among Kona owners about overcharging, myself included, who are more familiar with 13.8 V systems. But, 14.7 V is how it works on the Kona so I can only assume that technology (i.e. calcium) has moved on and I have yet to catch up. I also have to assume that they designed the system to meet the charging requirements specified by Rocket.At a constant voltage of 13.8 to 14.2 you could eventually start overcharging the battery, that's why smart chargers shut off. And clearly daily charging will eventually recharge the battery.
All of this assumes there is not some constant drain on the battery that exceeds the charging current on average.
The days of "trickle charging forever" were gone many years ago, even for non lithium ion batteries.
Greg (a non-retired electronics engineer )