https://www.greencarcongress.com/2019/1 ... etron.html
Audi boosts range and efficiency in e-tron; extra 25 km in WLTP
Audi is introducing a standard technical update for its first all-electric product, the e-tron. This combines optimized drive system hardware with software adjustments to improve efficiency. As a result, all versions of the e-tron SUV will come off the assembly line with an extra 25 kilometers (15.5 mi) or so of range. The new models are available now to customers in Europe.
The new versions of the Audi e-tron 55 quattro will be able to drive for up to 436 kilometers (270.9 mi) on a full battery charge (WLTP cycle)—an additional 25 kilometers (15.5 mi) over its previous capability. Using a new type of wheel brake, the developers have achieved further reductions in residual brake torque. This refers to losses that occur as a result of the proximity of the brake calipers to the brake discs.
The drive system has also become more efficient. In normal driving, the motor on the rear axle provides propulsion as standard. Now, due to a number of optimizations, the front electric motor is almost entirely disengaged and disconnected from the electricity supply. Only when the driver requests more power do both motors spring into action. . . .
In addition, the usable range of the high-voltage battery has increased. The battery in the Audi e-tron 55 quattro has a total capacity of 95 kWh and now gives customers access to a net power figure of 86.5 kWh.
All newly produced models will benefit from the technical upgrade. There is no change to prices for the Audi e-tron 55 quattro, which start at €80,900 (US$89,000).
The engineers have also made improvements to cooling. The highly flexible thermal management system, which comprises four separate circuits, has been revised and now regulates the temperature of the high-voltage components even more efficiently. Volume flows in the coolant circuit have been reduced, which means that the pump uses less power.
The sophisticated cooling system continues to guarantee rapid DC charging, a long battery life cycle and reproducible performance even under heavy loads. The standard heat pump harnesses waste heat from the high-voltage battery to keep the interior warm. Depending on the outside temperature, that can boost the Audi e-tron’s range by up to ten percent in customer operation. . . .
The degree of coasting recuperation can be set to any of three stages by means of paddles on the steering wheel, and there are now greater distinctions between the three, which allows the driver the option of a more pronounced “one-pedal feeling.” When braking from 100 km/h (62.1 mph), the Audi e-tron can recuperate up to 300 N·m (221.3 lb-ft) and 220 kW. That corresponds to more than 70% of its operating energy input. . . .
So maybe another 10-12 miles EPA, which is about a 5-6% increase.