Not a battery expert but part of the challenge is too much heat in some places, not enough in others, so heat management is a big challenge, but coolant routing

Not a battery expert but part of the challenge is too much heat in some places, not enough in others, so heat management is a big challenge, but coolant routing is complicated. The heat pump is a big deal and far more efficient (4x?) than a 'block heater', and resistance heat is the old solution that the industry moved away from. I believe the "microscale channels" are a better solution that reduces the amount of heat generated at the connection points of the battery, and also reduces the high temperature gradient at high voltage charging at low internal temps (high internal temperature delta), which I understand to be a primary cause of battery degradation.