Can Supercapacitors replace batteries?Follow article
I have been looking at the new Kemet Supercapcitor Series to see if they can be used to replace batteries.
It would be best to first define the difference: Electrochemical double layer capacitors, also known as supercapacitors or ultracapacitors, are energy storage elements with high energy density compared to conventional capacitors and high power density compared to batteries. Unlike conventional capacitors, where no chemical reactions is used and small amount of energy is stored by physically storing electric charges between two conductive plates upon application of an electric field, these electrochemical storage devices cross the boundary into battery technology by using special electrodes and electrolyte, and have capacitance values as high as 3500 Farads in a single standard case size with long cycle life (>100 000 cycles).
Supercapacitors are the preferred choice in applications requiring a large amount of energy to be stored and delivered in bursts repeatedly. Batteries have high internal resistances (ESR) that are too large to continue to consistently deliver high-power pulses without increasing the risk of performance failures. Supercapacitors ultra-rapid charging and delivery of high current make them an ideal candidate to balance loads on power grids, standby/backup power supplies, or peak-load enhancer for hybrid vehicles. In these applications, supercapacitors will supply power to the system when there are surges or energy bursts, while the batteries can supply the bulk energy since they can store and deliver larger amount energy over a longer slower period of time.
The Kemet Supercapcitor Series have characteristics ranging from the traditional capacitors and batteries. As a result, supercapacitors can be used like a secondary battery when applied to in a DC circuit. These devices are best suited to low voltage DC hold-up applications such as embedded microprocessor systems flash memory.
• Wide range of temperature from -25C to +85C
• Maintenance free
• Maximum operating voltage:5.5 VDC
• Highly reliable against liquid leakage
• Lead-free and RoHS Compliant
• Real time clock back up
• Embedded RAM and flash hold-up
• Motor drivers, servo motors, high power LED’s, buzzers
In conclusion Supercapacitors offer a promising alternative approach to meeting the increasing power demands of energy storage systems and electronic devices. With their high power density, ability to perform in extreme temperatures, and millions of charge-recharge cycle capabilities, supercapacitors can increase circuit performance and prolong the life of batteries. This can add value to the end-product and ultimately reduce the costs to the customer by reducing the amount of batteries needed and the frequency of the replacement of the batteries, which adds greatly to the environmental friendliness of the end-product as well.
If you would like to find out more information or purchase any of the Kemet Supercapcitor series (FG, FC, FR, FY, FS & FT) click on the link below