You can find more details on the 64 kWh battery pack used in the new Soul EV in this article that I wrote recently. Although this article is focused on the recently available Hyundai Kona Electric, the same design is used in the new Soul EV pack...
Lots of new details on the internal layout and liquid thermal management of Kia and Hyundia’s new generation of EVs including the Niro EV, the coming new-generation Soul EV as well as the Kona Electric:
See for more details...