[timerol]

The state of the art (not just for BYD) is to make sure you don't have to charge a cold battery by getting it to the right temperature before charging. One of the reasons that Tesla (and others) has navigation integrated into trip planning integrated into the vehicle is so that the battery temperature can be optimized in the 10 minutes before you start charging, to maximize charging speed.

BYD would not pump 400 kW into a battery at -10 C. This research helps in the situation where you have a cold battery, and need to start charging it before it can warm up.