Monitoring fading rate of ultracapacitors using online characterization during power cycling

Supercapacitor testing for power smoothing in a variable speed offshore Wave Energy Converter

“…While SC lifetime has been tested before, it has typically been accelerated testing, where elevated voltages and temperatures were used. Based on changes in lifetime at small deviations of voltage and temperature at elevated values, typical lifetimes at normal conditions were determined from extrapolations [13], [14], [15]. Maxwell Technologies provide some results from their lifetime testing but only up to 150,000 cycles, and then extrapolate to one million [7].…”

The Benefits of Device Level Short Term Energy Storage in Ocean Wave Energy Converters

“…While SC lifetime has been tested before, it has typically been accelerated testing, where elevated voltages and temperatures were used. Based on changes in lifetime at small deviations of voltage and temperature at elevated values, typical lifetimes at normal conditions were determined from extrapolations (El Brouji et al, 2008, Lajnef et al, 2007, Paul et al, 2009. Maxwell Technologies provide some results from their lifetime testing but only up to 150,000 cycles and then extrapolate to one million (Maxwell, 2011).…”