The Audi e-tron (type: GE) is an electric battery-powered luxury SUV from Audi AG. It belongs to the e-tron brand. The model was unveiled in San Francisco on September 17, 2018. Delivery of the first Audi e-tron vehicles started in March 2019, although it was originally planned to start at the end of 2018.

History and current events

The first concept vehicle, the Audi e-tron quattro concept, was presented at the IAA in autumn 2015. Originally, the production version should have been presented at the Audi Summit on August 30, 2018 in Brussels, but it was canceled. Production of the vehicle started on September 3, 2018 in the CO2-neutral Audi plant in Brussels. The premiere of the Audi e-tron was postponed and finally took place on September 17, 2018 in San Francisco. The formal premier at the trade fair took place at the Mondial Paris Motorshow in October 2018. A short time later it became known that the Audi e-tron could not be delivered to the first customers as planned in 2018, as software problems delayed delivery by at least four weeks. However, the first vehicles were delivered to customers from March 2019.

In June 2019, Audi started a global recall for the Audi e-tron. The reason: a faulty seal on the low-voltage cable can cause moisture to penetrate the lithium-ion battery. This causes the orange battery warning light to come on, as a result fast charging is then no longer possible. In the worst case, a short circuit or a “thermal event” is possible because of the water that has penetrated the battery. The latter can cause fire. According to Audi, however, the likelihood of a leak is extremely low. A total of 1650 vehicles are affected by the recall.

In November 2019, the Audi e-tron Sportback, a variant with a flat, tapering roof shape, was presented at the LA Auto Show. It has been on sale since February 2020. At the same time, the variant with the steeper rear received a slight technical revision.

EXTERIOR

The five-seat sport utility vehicle is 4.90 meters long, 1.94 meters wide (without mirrors) and 1.63 meters high (including roof antenna). The frontal area of the vehicle is 2.65 m². The curb weight of the vehicle with driver is 2565 kg. The only difference in the dimensions of the “Sportback” variant is the height, which is only 1616 mm. In terms of external dimensions, the vehicle lines up between the current series of Audi Q5 and Audi Q7 models.

Electronic exterior mirrors are available at an additional cost. The image from the cameras attached to the side of the vehicle is displayed on two monitors in the two front doors. In this configuration, the drag coefficient drops from 0.28 to 0.27. With the Sportback, a drag coefficient of 0.25 is reached. The electronic exterior mirrors are not yet approved for all markets worldwide; the e-tron is optionally available with both conventional exterior mirrors or with cameras.

EQUIPMENT

Standard equipment for the Audi e-tron includes 12-way heated and ventilated front seats, a panoramic moonroof, and 20-inch wheels. This can be upgraded to include massage seats, power door closers, leather upholstery, 21-inch wheels and orange brake calipers. The interior is in line with other Audi models with a 10.1-inch infotainment screen, a smaller 8.6-inch touchscreen display, Amazon Alexa voice control, virtual cockpit system, and an optional head up display. The Audi e-tron is also equipped with Bang & Olufsen sound system, Driver Assistance package with enhanced adaptive cruise control, automatic parking assist and night vision.

The e-tron is the second production car to offer optional virtual side mirrors, which replaces the traditional side-view mirrors and instead use cameras transmitting images to a high-contrast 7-inch OLED embedded in the door panels.

Battery

The lithium-ion battery of the Audi e-tron 55 quattro with a nominal energy content of 95 kWh, of which 83.6 kWh can be used, consists of 432 pouch cells from the Korean supplier LG Chem and weighs a total of 699.4 kilograms. The battery contains 36 modules with 12 cells each. One cell has a capacity of 60 Ah. In total, the parallel connection of four cells each results in a nominal capacity of 240 Ah. The nominal voltage of the battery is 396 V. As part of a small revision, the usable energy content was increased to 86.5 kWh at the end of 2019.

The Audi e-tron 50 quattro has a lithium-ion battery with a nominal energy content of 71 kWh, of which 64.7 kWh can be used. This battery consists of 324 prismatic cells from the Korean supplier Samsung SDI.

The battery of the Audi e-tron can be actively cooled and heated via a water-glycol circuit.

Charging

The e-tron can be charged via the onboard charger with up to 11 kW (3 × 230 V, 16 A three-phase) at a three-phase connection (AC). A second charger will also be available as an option from 2020, resulting in a charging capacity of up to 22 kW (3 × 230 V, 32 A three-phase). The maximum charging power at CCS fast charging stations is 150 kW (DC) for the Audi e-tron 55 quattro and 120 kW (DC) for the Audi e-tron 50 quattro.

Power Consumption

The range of the model equipped with a 95 kWh lithium-ion battery is up to 417 kilometers according to the WLTP cycle, depending on the equipment. The energy consumption according to WLTP is 22.6–26.2 kWh / 100 km. In autumn 2019 the range of the e-tron 55 quattro was increased to up to 436 km, the power consumption according to WLTP is now 22.4–26.4 kWh / 100 km. The equivalent fuel efficiency measured by EPA is 74 MPGe, with 33.7 kWh of energy corresponding to one gallon of gasoline.

Drive

The Audi e-tron is equipped with asynchronous electric motors integrated in the front and rear axles with a system output of 300 kW (408 PS) and a maximum torque of 664 Nm. This is achieved in ‘boost’ mode, which is limited to a period of 8 seconds, in drive position “S”. If the vehicle is not operated in boost mode, the peak power available for 60 seconds is 265 kW and the maximum torque is reduced to 561 Nm. The maximum power on the front axle is 135 kW (184 PS) and 165 kW (224 PS) on the rear axle (both when in boost mode). The maximum speed of the vehicle is electronically limited to 200 km / h; It accelerates from 0 to 100 km / h in 5.7 seconds in boost mode, otherwise in 6.6 seconds in standard mode. The continuous power of the vehicle drive is 100 kW. The spur gear differential for front and rear axle drives is manufactured by Schaeffler. On the front axle, the input and output shafts are parallel to each other (APA250: asynchronous motor, axis-parallel arrangement, 250 Nm torque), on the rear axle the output shaft is guided by the drive shaft in a coaxial design (AKA320: asynchronous motor, coaxial arrangement, 320 Nm torque ). The transmission, asynchronous motor and power electronics are assembled at Audi Hungaria in Györ (Hungary). The e-tron 50 quattro has some different data.

Braking System

The vehicle has internally ventilated brake discs as standard, which are operated electro-hydraulically. The diameter of the one used on the front axle is 375 mm in combination with six-piston fixed calipers, on the rear axle 350 mm with single-piston floating calipers. They are used if the negative acceleration should be more than 0.3 g (corresponds to 2.9 m / s²). Below this, the vehicle decelerates using electrical recuperation. Since Audi assumes that the friction brakes rarely have to be used in everyday driving and that rust would then build up, the vehicle has an automatic brake cleaning function.

The car is the first all-electric mass-produced vehicle with brake-by-wire.

AUDI E-TRON REVIEW

AUDI E-TRON TECHNICAL DATA

e-tron 50 quattro e-tron 55 quattro e-tron S
Model Year from 11/2019 09/2018–11/2019 from 11/2019 from 09/2020
Motor type 2× AC electric motor 3× AC electric motor
Engine type 2× Induction motor 3× Induction motor
Motor series (front axle) APA250 APA320
Motor series (rear axle) AKA320 2× ATA250
Maximum output 230 kW (313 PS) 300 kW (408 PS) 370 kW (503 PS)
Continuous output 100 kW (136 PS) 140 kW (190 PS)
Front axle Peak Power 125 kW (170 PS) 129 kW (175 PS)
in Boost-Mode 135 kW (184 PS) 157 kW (213 PS)
Rear axle Peak Power 140 kW (190 PS) 2× 102 kW (139 PS)
in Boost-Mode 165 kW (224 PS) 2× 138 kW (188 PS)
Maximum Torque 540 Nm 664 Nm 973 Nm
Front axle Peak Torque 247 Nm 314 Nm
in Boost-Mode 309 Nm 355 Nm
Rear axle Peak Torque 314 Nm 2× 247 Nm
in Boost-Mode 355 Nm 2× 309 Nm
Drive type electric Four-Wheel Drive (4×4)
Gearbox two speed input gears
Gear Ratio (front axle) 9,205 : 1
Gear Ratio (rear axle) 9,083 : 1
Curb weight 2445 kg 2565 kg 2695 kg
Maximum Payload 595 kg 565 kg 550 kg
Maximum Braked Trailer Load 1800 kg
Battery weight 699 kg
Acceleration, 0–100 km/h 6,8 s 6,6 s 5,1 s
in Boost-Mode 5,7 s 4,5 s
Top Speed 190 km/h 200 km/h 210 km/h
Battery Capacity 71 kWh / 64,7 kWh 95 kWh / 83,6 kWh 95 kWh / 86,5 kWh
Energy consumption according to WLTP
over 100 km, combined
21,6–26,6 kWh 22,6–26,2 kWh 22,4–26,4 kWh 26,4–28,4 kWh
Energy efficiency according to EPA,
combined
74 MPGe
Range
by WLTP 336–347 km 358–417 km 358–436 km 364–370 km
by EPA 328 km
Charging time AC, type 2, to 100%
11 kW charging power 8,5 h
22 kW charging power 4,5 h
Charging time DC, CCS, up to 80% approx. 30 min (120 kW) approx. 30 min (150 kW) approx. 30 min (150 kW)

AUDI E-TRON CRASH TEST