Ultracapacitor Introduction

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Ultracapacitor : Introduction

Ultracapacitor (Supercapacitor) is promising energy storage device that positioned between conventional electrolytic capacitor and rechargeable batteries. High power, high energy and long-term reliability feature of Ultracapacitor (Supercapacitor) enable this component to use in various applications as backup power unit, auxiliary power unit, instantaneous power compensation, peak power compensation and energy storage as well.

Ultracapacitor : Principle of Work

Ultracapacitor (Supercapacitor)?is composed of two electrodes immersed in electrolyte, and its porous dielectric separator prevents short circuit of two electrodes.

Ultracapacitor (Supercapacitor)?stores energy relied on electrostatic charges on opposite electrode surface of the electric double layer, which is formed between each of the electrodes and the electrolyte.

Randomly distributed ions in electrolyte move toward the electrode surface of opposite polarity under electric field when charged. It is purely physical phenomena rather than though a chemical reaction and highly reversible process, which result in high power, high cycle life, long shelf life, and maintenance-free characteristics.


Rated Voltage: up to 3.0 V

High Power Performance (vs. Battery)

High Energy Performance (vs. Capacitor)



Wide operating temperature range(-40 °C ~ 65 °C)

Low internal resistance

Balancing and Over voltage Protection of Individual Cell

Easy build-up design for High voltage module

Efficient Heat transfer to outside

High Energy & High Power

Ultracapacitor?is unique energy storage device to offer high power and high energy simultaneously compared with conventional electrolytic capacitor and battery. The high content of energy stored by?Ultracapacitor?in comparison to conventional electrolytic capacitor is came from activated carbon electrode material having the extremely high surface area and the short distance of charge separation created by the opposite charges in the interface between electrode and electrolyte.


High power, long shelf and cycle life performance of?Ultracapacitor?originate in the energy storage mechanism differing from battery. In battery, energy is stored and released via chemical reaction inside electrode material that cause degradation of overall system. On the other side,?Ultracapacitor?uses physically charge separation phenomena between charge on electrode and ions in electrolyte at the interface. Since charge and discharge process are purely physical and highly reversible,?Ultracapacitor?can release energy much faster (with more power) than a battery that relies on slow chemical reactions and can be cycled hundreds of thousands of times without deep effect on performance

Different unit between Ultracapacitor (Farad) and battery (Ampere hour) makes users to get confused when adopting Ultracapacitor in their system.

The amount of energy stored in ultracapacitor can be easily calculated by using following equation.

Energy (Joule) = ? x Capacitance (Farad) x Voltage2?(Volts) It can be converted from Farad for Ultracapacitor to Watt hour unit which is normally used for conventional rechargeable battery.

Energy (Watt hour) = Energy (Joule) / 3600 (sec) we recommended to operates ultracapacitor from maximum voltage to half voltage and release ? of total energy.

OK recommends polymer cells for virtually all consumer electronics applications or IT gadgets. It is available in any capacity and size customer desires. Customer is free to request unique capacity and size fitting it’s requirement most, or OK may suggest close-fit models which has already be tooled up. As long as OK has inventory in stock, usually quick prototype samples can be shipped out in days. The battery is available in either bare cells or battery packs completed with protection circuit module (“PCM”) with optional choice of safety devices like PTC, NTC, TCO, fuses or digital gas gauge IC.