creator Cao, Jian creator Emadi, Ali A hybrid energy storage system for supplying power to an application with a fluctuating load profile, such as, for example, electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, wind energy harvesting equipment and solar energy harvesting equipment. The hybrid energy storage system includes an ultra-capacitor electrically connected to a DC bus and a power source electrically connected to the DC bus via a controlled switch. The hybrid energy storage system further including a DC/DC converter connected between the power source and the ultra-capacitor, the DC/DC converter boosting a voltage of the power source to charge the ultra-capacitor. The DC/DC converter is preferably controlled to maintain a voltage of the ultra-capacitor at a higher value than the voltage of the power source. Submitted by Aric Ahrens (ahrens@iit.edu) on 2014-10-16T18:02:44Z No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) 8860359.pdf: 150487 bytes, checksum: a90023b485bd2cc8f754f0bcba4a8892 (MD5) Made available in DSpace on 2014-10-16T18:02:45Z (GMT). No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) 8860359.pdf: 150487 bytes, checksum: a90023b485bd2cc8f754f0bcba4a8892 (MD5) Previous issue date: 2014-10-14 Illinois Institute of Technology 2014-10-16 2014-10-14 8,860,359 http://hdl.handle.net/10560/3274 en CC0 1.0 Universal http://creativecommons.org/publicdomain/zero/1.0/ United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access