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Encounter - The Audi Technology Magazine 2/2013
A3 Sportback e-tron
Cooling of the high-voltage battery, power electronics and charging device is handled by a dedicated low-temperature circuit (NT 2), running on a separate radiator inside the engine bay. If required, it can connect to the air conditioning system and even divide itself into two sub-circuits. In this diagram, the battery is being actively cooled via the air conditioning system and chiller.