Maxwell Technologies, Inc. added a new addition to its K2 series of ultracapacitor cells. The new 2.85-volt, 3400-farad ultracapacitor cell increases the range of available specific power and stored energy in the industry-standard 60 mm cylindrical “K2” form factor, and introduces DuraBlue™ Advanced Shock and Vibration Technology, the newest innovation in ultracapacitor reliability and performance. DuraBlue Technology is tested to some of the most demanding environmental requirements for transportation, increasing vibration resistance by approximately 300 percent and shock immunity by 400 percent when compared with ultracapacitor-based competitive offerings.
K2 ultracapacitor at 2.85 V and 3,400 farads (Image courtesy of Maxwell Technologies)
Unlike batteries, Maxwell ultracapacitor products store energy in an electrical field that is larger than that of a capacitor – meaning ultracapacitors have greater energy storage capacity than capacitors. This electrostatic energy storage mechanism enables ultracapacitors to charge and discharge in as little as fractions of a second, perform normally over a broad temperature range (-40 degrees to +65 degrees C), operate reliably in hundreds of thousands or more duty cycles and resist shock and vibration. Maxwell offers ultracapacitor cells ranging in capacitance from one to 3400 farads and multi-cell modules ranging from 16 to 160 volts, which have proven to deliver high power, whether used alone or paired with batteries, in a variety of applications from automotive or industrial to consumer electronics, transportation and beyond.
Battery voltage management boards can be added to the series strap design. Showing here G,I and K are positive cell terminals and H, J and L are negative. (Image courtesy of Maxwell Technologies)
A great application example is in solutions for hybrid train systems where the ultracapacitor is integrated into custom modules. UPS backup systems and grid applications also benefit from these types of capacitors. Even in burst power solutions, like starting a diesel vehicle on a cold day.
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