Patent 7591331 was granted and assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT on September, 2009 by the United States Patent and Trademark Office.
An energy storage system is provided for an at least partially electromotively driven or drivable motor vehicle having a drive unit constructed as an electric machine for generating drive power onto a drive train. The energy storage system includes a first energy storage unit utilizing capacitive energy storage devices, and a second energy storage unit connected in parallel with the first energy storage unit and utilizing electrochemical energy storage devices.