Overview

Overview

Ultracapacitor, also known as supercapacitor, supercondenser, electrochemical double layer capacitor (EDLC) or pseudocapacitor, is an electrochemical capacitor that has an unusually high energy density when compared to common capacitors, typically on the order of thousands of times greater than a high capacity electrolytic capacitor.


Compared to batteries, the ultracapacitor has more than
ten times stronger in power and thousand times longer in
cycle life, although it may have one tenth the energy den-
sity of batteries. So, power and life is often the reason for
choosing the ultracapacitor.
The Ultracapacitors as a proven energy storage
device


The ultracapacitor enjoys boundless
growth potential because it
responds to key market
and societal needs: it is
environmentally friendly,
helps conserve energy,
and enhances
the performance and
portability of consumer
devices.
Ultracapacitors are also
free from the characteristic battery problems of
limited cycle life, cold intolerance, and critical
charging rates.

Many applications can benefit from ultracapacitors, whether they require short power pulses or low-power support of critical memory systems. Ultracapacitors can be primary energy devices for power assist during acceleration and hill climbing, as well as for recovery of braking energy. Only ultracapacitors can capture and store large amounts of electrical energy (generated by braking) and release it quickly for reacceleration. Using an ultracapacitor in conjunction with a battery combines the power performance of the former with the greater energy storage capability of the latter. It can extend the life of a battery, save on replacement and maintenance costs, and enable a battery to be downsized. At the same time, it can increase available energy by providing high peak power whenever necessary.