Automotive Technology Of The Future: Flywheel Battery Technology

Porsche Spyder 918 Hybrid Concept

Porsche Spyder 918 Hybrid Concept

When you hear the name: “Flywheel Battery Technology“, you may wonder what kind of thing it is. As you may know, battery stores electric energy and the flywheel, which is a round shaped thing storing the energy for an instantaneous period of time. The flywheel used in a conventional car has the purpose of storing energy for a shorter period of time, because in an IC engine, there are in general four strokes. Out of the four, only the power stroke releases power, so for the other strokes, for example compressing the air fuel mixture inside a car’s cylinder something has to supply the energy. It comes from the flywheel, which stores some of the energy from the power stroke and helps driving the other three strokes, thus making the car smoother to drive, otherwise the car will pitch like hell. Now the news is that Porsche is coming with this unique technology in it’s  911 GT3 hybrid and the 918 Spyder hybrid.

This system is coupled to the front axle of the Porsche 911 GT3 hybrid, which has a 480 bhp rear wheel drive engine at the back. A flywheel battery system consists of a dense flywheel that is made to spin at a very high rpm, as soon as you press the brake pedal of the 911 GT3 hybrid. This rotation creates high energy in the form of inertia, and this inertia can then be converted into direct electrical current, which in turn can be stored in a battery. A combination motor/generator is used to start the flywheel spinning and is then used as the means for generating DC electricity. The flywheel spins in a vacuum and floats on nearly frictionless magnetic bearings. Thus making a very high torque while accelerating as well as keeping the fuel consumption as low as possible , which off course increases the range too. Porsche says this technology is the next big thing in Porsche and it will help define Porsche brand for the next 60 years.


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