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Can supercapacitors be used as a power source?

This has been demonstrated in rail systems and busses Li et al., 2017, Technology, 2017. The Aowei development company in Shanghai, China have been supplying supercapacitors as the only power source for the Capabus public transport network since 2006.

What is the difference between a battery and a supercapacitor?

While the construction of both is somewhat similar, the two devices have different physical mechanisms of operation. Batteries employ chemical reactions to create electrical energy, while supercapacitors store electrical energy by a mechanism called the electric double layer (EDL) effect.

How does a supercapacitor work?

From the supercapacitor bank, current passes through a bi-directional DC/DC converter to regulate the voltage so that it may be matched to that of the battery bank as necessary, controlling the flow of current between them. Both electric energy storage devices are connected to an inverter. This converts DC to the AC required to drive the motor.

Where are supercapacitors used?

The Aowei development company in Shanghai, China have been supplying supercapacitors as the only power source for the Capabus public transport network since 2006. The busses utilise overhead wireless charging stations at passenger pickup/drop-off points to maintain their energy supply.