Inaccurate cold weather charging prediction due to OBD data issue

I don’t know if this issue is specific to my 2019 Kona or not, but ABRP misestimates charging times by as much as 15 minutes in cold weather.

I think I’ve found the issue by looking at my car’s data with an OBD scanner app: it appears that ABRP is reading the temperature of the warmest battery module, while there may be other modules which are much cooler.

I’m just starting a charge now and ABRP is showing my battery temperature as somewhere around 87F. At that temperature and 16% SOC my battery should charge at near maximum speed (75-77kw). But I’m charging at 50kw.

Looking at the Car Scanner iOS app, my car reports the temperature of 4 battery modules. The warmest is at 87. Two are around 77, and one is at 69. The outside temperature has been at 35F, and I’m guessing the difference is explained by which module is most exposed to the cold air.

It makes sense that the car would charge at the rate of the coldest module in order to protect the battery. I would suggest that in cold weather, ABRP should model based on the coldest module, not the warmest.

Perhaps this is a car-specific issue and something needs to be updated for the oBD profile of the 2019 Kona. I just captured a bug report in the app in case that is helpful.