AllCharge Technology Makes EVs Fit for Any Type of Charging Station
At the IAA Frankfurt Motor Show in September and at Continental Tech Show in June 2017 technology company Continental will be presenting an answer to the problems posed by the non-standardized charging infrastructure for electric vehicles.
The basic idea is simple. Rather than cramming the car with extra technology to match all the different types of charging station, Continental turns the electric powertrain itself into a ‘charger’. Dubbed the ‘AllCharge’ system by Continental, this technology is based on the components of a conventional electric powertrain (comprising electric motor and inverter – for switching between DC and AC power). Since constant AC/DC switching at different voltages is already an inherent feature of the electric powertrain, these components already possess all the necessary capabilities to function as a charging system. By exploiting these capabilities, Continental is now able to provide interoperability with different charging technologies using an onboard, vehicle-based solution.As well as being able to charge their vehicle at any charging station, at an output rate of up to 800 V and up to 350 kW, drivers also have 230 volts of AC power available for onboard use if needed. The AllCharge system’s V2D (vehicle-to-device) technology also allows the vehicle battery to be used to power mobile electrical devices ranging from a laptop to a refrigerator or an electric drill. “Today, EV drivers often end up parking at a charging station that doesn’t allow them to charge as fast as they would like,” says Dr. Oliver Maiwald, Head of Technology & Innovation in the Powertrain Division at Continental. “With Continental’s AllCharge powertrain, drivers no longer need to worry about finding the right type of charging station. Their vehicle is equipped for every type of technology, from single-phase or three-phase AC to high-speed DC systems. Maiwald added “the maximum benefit can be reached for urban AC charging stations, here a 12 times faster charging is possible.”
The vehicle is equipped with a single cable connector, but there are two possible charging current paths to the battery. In the case of AC current, the current flows from the charging station via the electric motor to the inverter, where it is converted into DC current before being supplied to the battery. In the case of DC current, the current from the charging station flows directly through the inverter to the battery. AllCharge works with any type of charging station, and can operate at a rate of up to 800 V and a power from 150 kW today and up to 350 kW for special premium applications. “With 350 kW DC charging, five minutes charging time provides approximately 150 km of driving range – a good indication of our charging system’s true potential,” says Dr. Martin Brüll, who is a responsible expert for the new charging system. “No matter how quickly the infrastructure develops in future, a vehicle with AllCharge technology will always be able to make the most of the selected charging station’s capacity.” At the Continental Tech Show and IAA 2017, Continental will host the first ever live demonstrations of the AllCharge system.
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