Why does the Audi e-Tron require a heat pump and how does it work?

I've read that the Audi e-Tron is equipped with a heat pump. What is the purpose of this and how does it function?

The heat pump is essential for efficient operation of the Audi e-Tron. It uses heat from outside air to warm the car's interior and batteries, as well as cooling components when needed. The system also reduces the load on the high-voltage battery by using ambient energy instead of using battery power.

The heat pump is a great feature for electric vehicles with larger battery sizes, such as the Audi e-Tron. It helps to increase the driving range and overall performance of the car by optimizing the use of energy. Additionally, it can provide a more comfortable interior temperature in extreme weather conditions.