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Added on the 06/12/2018 15:18:35 - Copyright : Auto Moto EN
On long-distance routes, the Audi e-tron Sportback can charge with direct current (DC) at up to 150 kW at fast-charging stations. In just under half an hour, the battery reaches 80 percent of its capacity—sufficient for the next leg of its long-distance trip.
The thermal management system aims to get the battery up to the ideal temperature range of around 30 degrees Celsius quickly after it is started and to keep it there until the end of the journey. This ensures that its full power – and therefore the power of the entire drive system – is available after a short time even in extremely cold conditions. Thanks to the stable thermal conditions, the driver can also call on it repeatedly or charge the battery at an HPC charging terminal with high output. The sophisticated thermal management system also gives the battery a long life cycle – Audi guarantees that it will still have at least 70 percent capacity after eight years of operation or after 160,000 kilometers.
Unlike a petrol-powered car, where there’s already a vast and proven network that exists to keep it fueled, the e-tron will be launched into a world where there isn’t anywhere near the same support for electric vehicles. However, Audi as part of the VW Group has teamed up with Mercedes, BMW and Ford to create Ionity – a network of high-powered DC charging stations. By the end of this year there will be at least 200 Ionity stations, with an average of six charging points at each, all over Europe. By 2020 there will be double that. At a 150kw Ionity station, the E-tron takes just 30 minutes to gain 80 per cent of its full battery charge from flat. It’s not so swift when charging at home, however; the standard 11kw mobile charger that comes with the car will take 8 and a half hours to fully juice up the e-tron. An optional 22kw charger, as it’s twice as powerful, takes half the time.
The inner structure of the battery that contains the modules, the frame surrounding it, and the cover plates are made of lightweight aluminum. The battery system contributes significantly to the rigidity and crash safety of the body to which it is attached via 28 screws. Beneath its cell space there is a compound structure of flat extruded sections through which coolant flows that circulates in its own low-temperature circuit. The battery’s feel-good temperature is between 30 and 35 degrees Celsius.
Audi Q3 Sportback 45 TFSI e – System layout and thermal management when charging Animation
On long-distance routes, the Audi e-tron Sportback 55 quattro can charge with direct current (DC) at up to 150 kW at fast-charging stations. In just under half an hour, the battery reaches 80 percent of its capacity-sufficient for the next leg of its long-distance trip. The e-tron Sportback 50 quattro can charge at up to 120 kW and achieves an identical charge status in the same time. Charging at public AC charging stations can be performed using a standard mode-3 cable. Up to 11 kW of power is available here, which can be increased to 22 kW with an optional second on-board charging device that will be available in summer 2020. Audi's own charging service, the e-tron Charging Service, provides easy access to almost 120,000 public charging points in 21 European countries - and the number is rising. Whether AC or DC, 11 or 150 kW-a single card is all that is required to start the process. The Plug & Charge function, which is also due to follow in 2020, will make charging even more convenient: The car authorizes itself at the charging station and activates it. The highly flexible thermal management, which comprises four separate circuits, regulates the temperature of the high-voltage components with maximum efficiency. This enables rapid DC charging, a long battery life cycle, and reproducible performance even under heavy loads. The standard heat pump, which harnesses waste heat from the high-voltage battery, can use up to 3 kW of actual power losses for heating and air conditioning the interior-which is exceptionally efficient. Depending on the outside temperature, that can boost the Audi e-tron Sportback's range by up to ten percent in customer operation.
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