Flexbattery : merging multilevel power conversion and energy storage

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This paper describes a “flexbattery” modular battery pack concept that integrates the function of energy storage, active cell balancing, and bidirectional multilevel power conversion.As a result, the flexbattery pack does not have a positive or negative terminal, but terminals that can operate at arbitraryvoltage levels, both positive or negative. Since each connection terminal can generate a variable voltage within a certain range, the system can also supply ac voltage. Therefore, with appropriate control this innovative flexbattery could be directly applied to an electrical motor. Also, the flexbattery pack can be charged from any voltage level within the nominal output range of the pack, both dc or ac. The elementary flexbattery unit is introduced and analyzed together with the operation of a pack. Additionally, the concept has been experimentally verified with a 120 W three-unit, nine-level prototype under both ac and dc operation.
Original languageEnglish
Title of host publicationIEEE Energy Conversion Congress and Exposition (ECCE America), 18-22 September 2016, Milwaukee, Wesconsin
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages7
ISBN (Electronic)978-1-5090-0737-0
ISBN (Print)978-1-5090-0738-7
Publication statusPublished - 2016
Event8th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States
Duration: 18 Sept 201622 Sept 2016
Conference number: 8


Conference8th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2016
Abbreviated titleECCE 2016
Country/TerritoryUnited States
Internet address


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