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E-Sport Limousine – New Flow (Part 1)

8/28/2014 11:23:49 AM

Now for something a little different: a super sedan featuring new technology that could represent a quantum leap for automotive energy storage systems.

Undoubtedly one of the more curious technological premieres that the automotive industry has showcased so far this year has been that of the Quant e-Sportlimousine. A testbed for Liechtenstein-based NanoFlowcell, an R&D developer founded in late 2013, the role of this first tech demonstrator from the company is to be “a research vehicle for road-testing innovative energy storage systems, focusing especially on developments and improvements in flow cell battery technology”, explains technical director Nunzio La Vecchia.

If ever there were a vehicle to arise from left field, the Quant e-Sportlimousine would be it. Digging in the archives reveals the car’s origins starting in 2003 as the brainchild of the La Vecchia brothers.

If ever there were a vehicle to arise from left field, the Quant e-Sportlimousine would be it. Digging in the archives reveals the car’s origins starting in 2003 as the brainchild of the La Vecchia brothers.

Automotive use of redox flow-cell batteries is by no means a new idea but it has long been dismissed by many in the industry because of problems relating to weight and generally poor charge density, as well as the rather awkward matter of having to refill with charged electrolytic fluid. However, NanoFlowcell and La Vecchia claim to have come up with a novel cell design and an electrolyte breakthrough that realizes a high number of charge carriers that tackle the first two issues – and with redox flow-cell batteries now coming into more common use in domestic and renewable energy storage applications – it’s not entirely fanciful to suggest that some kind of electrolyte-swapping and electrolyte-charging infrastructure could develop in the near future. After all, as Tesla has shown with its Supercharger network, developing solutions at the more exclusive and boutique end of the market is not as problematic or cost-sensitive as trying to resolve refuelling or recharging issues for large numbers of mainstream customers.

The heart of the car utilizes a three-tank system that stores two types of liquid electrolytes — one positively charged, the other negatively.

The heart of the car utilizes a three-tank system that stores two types of liquid electrolytes — one positively charged, the other negatively.

The e-Sportlimousine’s batteries combine elements of accumulator cells and fuel cells, and comprise two cells, separated by a membrane through which the charge passes. The liquid electrolyte, stored in two 200-liter on-board tanks, circulates through the cells, and parallel oxidation and reduction processes generate electrical power, stored in two supercapacitors, to drive the car’s four in-wheel, three-phase induction motors. These supercapacitors also capture energy through regenerative braking. “The advantages of the NanoFlowcell lie in its high-charge density, high-performance density, and its light weight. Furthermore, it contains no harmful substances, no moving parts and it is very efficient,” adds La Vecchia.

Effective Energy Carrier

Developed at NanoFlowcell’s Digilab in Zurich, the battery cells are showing a continuous output of 30kW at a nominal voltage of 600V and a current of 50A in early simulation assessments, and are said to remain stable through 10,000 charging cycles with almost no self-discharging or capacity loss. They are also claimed to be thermally stable, producing negligible waste heat, and are less flammable than lithium-ion batteries. Yet it is arguably the potential synergies between car and renewable grid that are the most interesting element, with effective use of the car as an energy carrier.

It sounds easier than it likely is, but upon inspection of its nanoFLOWCELL powerplant, it just might have a shot. It’s a 912-horsepower electric car.

It sounds easier than it likely is, but upon inspection of its nano FLOWCELL powerplant, it just might have a shot. It’s a 912-horsepower electric car.

The energy density of the batteries is said to be more than five times greater than that of existing flow cells, and five to six times that of current lithium-ion technology’s 600Wh/litter. The e-Sportlimousine is thus claimed to have a range of up to 600km (372 miles) between electrolyte swaps.

 

 

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