Computer simulation of ultracapacitors and advanced chemistry batteries is becoming more widespread as the engineering community becomes more atoned to global climate change and its attendant demand for efficient energy storage systems. The ultracapacitor and advanced battery are being evaluated for stationary and mobile applications as standalone energy storage units and, in a growing number of cases, in combination. This paper describes a computer software tool Q3D Extractor for geometry based extraction of parasitic elements, in our case, of the bus bar interconnects used in commercial ultracapacitor modules. For some applications the parasitic inductance, capacitance and resistance of these interconnects can be neglected because the currents are either relatively low or the pulse widths wide. However, in a growing number of cases ultracapacitors are being buffered through an interface dcdc power electronic converter operating in the range of 22 kHz and up to 150 kHz or higher. This is happening for converters rated in the 5 kW to 70 kW range for industrial and is being investigated for transportation applications.
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