2026 / 04 / 06 / ENGINEERING / 5 MIN
Thermal discipline
Batteries are happiest at the same temperature you are. Keeping them there is an engineering discipline.
Cold slows chemistry; heat ages it. The window is narrow — roughly 20 to 35°C — and the car spends its life dragging a two-ton battery into that window.
One loop does the work: battery, motors, cabin. Waste heat from the drive units warms the pack in winter; the heat pump multiplies every watt spent on comfort.
Preconditioning is the visible part: warm the pack on the way to a fast charger and charging starts at full speed. Skip it and the first ten minutes crawl.