AUDI E-TRON PUTS THE ENERGIZER BUNNY TO SHAME
An advanced thermal cooling system that incorporates a heat pump will allow the upcoming Audi e-Tron to avoid power fade due to batteries that overheat when the car is driven hard for an extended period. Audi’s system is designed to keep the 95 kWh battery pack humming comfortably between 25° and 35° Celsius at all times, especially during periods of spirited driving.
According to Anno Mertens, project director for charging infrastructure at Audi, the thermal cooling system will make it possible to go pedal to the metal in the Audi e-Tron, over and over again, without any drop in performance, neither at high load, nor over an extended period.
Following a ladder frame design located underneath the battery cells, the cooling system is bonded to the battery cells with a specially developed adhesive that allows for optimal thermal transfer. The aluminium ladder segments are filled with glycol, and a conventional radiator in the front of the vehicle cools the fluid, which also explains the traditional grill on the e-Tron. Surplus heat from the cooling system can also be used to heat the interior of the car, and the heat pump helps to heat the battery pack in cold conditions.