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Audi says new 48 volt micro-hybrid system improves fuel economy, paves way for electrification

Most cars use a 12-volt system to power their electrical components. But, with more and more electric bits and bobs being added to new vehicles, a dozen volts is looking a bit weak these days. In fact, Audi says that standard 12-volt systems are being stretched "to their very limits." Enter 48 volts. If used in a car that gets 40 mpg, that would translate to around 43.5 mpg. Audi is testing a supplemental 48-volt electric system in two prototype vehicles – modified mild-hybrid versions of the A6 TDI and the RS 5 TDI – in order to add in more electric technology (an electric compressor, for example, to improve acceleration) and "convenience systems for dynamic chassis control." Audi says it has more applications in the pipeline, but the overall gist is that the German automaker sees 48 volts as an "important building block in electrification strategy." As you can see in the picture above (click to enlarge), the RS 5 TDI concept uses a li-ion battery installed in the back of the car and an alternator to provide 48 volts when the engine is off. Audi says that the 48-volt system can save up to 0.4 liters of fuel per 100 kilometers. To put that into US numbers, if used in a car that gets 40 miles per gallon today, that would translate into a bump up to around 43.5 mpg. The Advanced Lead Acid Battery Consortium (ALABC) is also working on a 48-volt system to improve fuel economy and we've got a deep dive of Audi's electric turbocharger here. Even more powerful and efficient – the new 48-volt technology from Audi Important building block in electrification strategy More voltage and more power for new technologies Scalable platform concept suitable for wide-ranging uses Ingolstadt, August 25, 2014 – Audi is to upgrade part of its vehicle electrical system from twelve to 48 volts. The move represents another technical building block for facilitating the integration of new automotive technologies while increasing the power and efficiency of its cars. "We are using the full bandwidth of electrification in our drive principles strategy. Running part of the vehicle electrical system at 48 volts plays a central role in this," commented Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at Audi. "It enables us to make more energy available.

Audi planning A7 powered by fuel cell?

Back in March, Volkswagen AG CEO Martin Winterkorn voiced his doubts about the cost and infrastructure associated with building hydrogen fuel cell vehicles, but according to Autocar, that isn't stopping Audi from developing a fuel-cell version of the Audi A7. While we're inclined to take this report with a grain of salt, this wouldn't be the first time a VW executive has made seemingly damning statements about electric powertrains that later proved to be incorrect.
After speaking with Audi technical chief Wolfgang Dürheimer, Autocar reports that Audi is building a fuel cell A7 that is expected to be ready for testing by August. Like the electric E-Tron and natural-gas-powered G-Tron models, the hydrogen fuel cell Audis could, if produced, carry their own "tron" nomenclature.

Recharge Wrap-up: Schaeffler 48V mild hybrid Audi TT, Georgia Power charging stations

Schaeffler will test a 48-volt mild hybrid system in the Audi TT. A lithium-ion battery powers an electrified rear axle, which supplements the power provided to the front wheels from the internal combustion engine. The system includes a belt-driven starter generator also running on 48 volts. The car has driver-selected Sport and Eco modes, the latter of which maximizes all-electric driving at low speeds for increased fuel economy. The rear axle can also support the front when more traction is needed. Sport mode wrings out every bit of performance from both the internal combustion and electric motors, with torque vectoring between the rear wheels offering extra stability. Read more at Green Car Congress, or in the press release from Schaeffler. A man has built a near-life-size replica of a Tesla Supercharger out of Legos. Robert Turner's ode to the charging station stands at 42.5 inches tall (which looks impressive standing next to a real Model S), and took over three months to build. Turner showcased his Lego Supercharger at the Brickworld Chicago Lego convention, and he goes into more detail about the painstaking process of forming his creation out of tiny plastic bricks in a video interview. See the Lego Supercharger and read more at The Brothers Brick. Georgia Power is opening 11 new EV charging stations around the state. The charging islands – which are located at various Georgia Power locations – offer DC fast charging with CHADeMo/SAE Combo plugs as well as Level 2 208/240-volt chargers. Customers can pay with either a Georgia Power or ChargePoint card. These first chargers are part of a larger plan by the utility to roll out 61 charging islands throughout Georgia by the end of 2016. See a list of locations and learn more in the press release below. Georgia Power opens 11 new EV charging islands First phase of statewide public charging infrastructure completed ATLANTA, Sept. 30, 2015 /PRNewswire/ -- Georgia Power announced today that the company will open 11 new electric vehicle (EV) charging islands to the public on October 1. The new charging islands, located at Georgia Power properties across the state, mark the completion of the first phase of planned charging infrastructure being developed by the company which will include approximately 61 community charging islands for public use statewide by the end of 2016.