In their press releases, BMW describes something called "anticipatory thermal management," which apparently includes preconditioning and battery temperature management:
Integrated heating and cooling system with heat pump function, anticipatory thermal management for the battery. The BMW iX is equipped as standard with an integrated heating and cooling system for the cabin, together with its high-voltage battery and its drive system that operates using an exceptionally efficient heat pump function. The system comprises three cooling/heating circuits that can be interconnected by means of electric valves with a shared expansion tank. While driving at low outside temperatures, for example, the excess heat generated by the drive units is used to warm up the high-voltage battery. A two-level cooling module, a refrigerant compressor, two evaporators, a water-cooled condenser and a high-performance control unit together ensure optimum temperature control for both the BMW eDrive components and the vehicle interior in any operating state and in all regular weather conditions. The latest version of the heat pump achieves a remarkably high efficiency factor by making use of ambient heat and heat from dehumidification – as well as the waste heat from the motors – for energy-efficient operation. This results in a gain in range of some 10 per cent compared with conventional electric heating and cooling systems. And range can be extended by as much as 40 per cent in extreme situations, such as driving in stop-start traffic when a high level of heating is required. The integrated heating and cooling system also ensures optimal temperature control for the high-voltage battery in highly dynamic driving situations with high power requirements and when rapidcharging from a DC charging station. If the navigation system’s route guidance function is active and has scheduled a mid-journey stop for the BMW iX at a fast-charging station, anticipatory thermal management will automatically pre-condition the battery beforehand. Warming up the high-voltage battery or cooling it down as appropriate means it will be at the optimum temperature for quick and efficient charging at maximum capacity upon arrival at the charging station. Thermal management takes a number of factors into account here, including current battery temperature, remaining range, the predicted charging rate and the amount of charging planned as part of the overall route calculation.