Database and Modeling of Field Test Data fromLithium Ion Batteries in Hybrid Electrical Vehicles.
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
In this thesis information received from a hybrid vehicle battery test equipment wasstructured and analyzed. This test equipment is currently placed on a fleet of Scaniatrucks with the purpose of emulating hybrid vehicle environment on battery cell level.A Microsoft Access database structure was set up in order to make it possible to savetest data in a structured way. In addition, Matlab scripts were made with the purposeof calculating cell aging from pulse- and capacity tests. Furthermore, drive cycleanalysis was performed looking at statistics for selected parameters. Data collectedfrom late October 2010 until beginning of July does not yet show any aging of the fieldtested battery cells regarding capacity loss or resistance increase. The internalresistance of the batteries was calculated to 2 to 4 milli ohm and the capacity wasfrom the tests found to be around 3 ampere hours. The energy efficiency, which wascalculated from pulse test data, shows an efficiency between 95 to 97%.
Place, publisher, year, edition, pages
2011. , 34 p.
UPTEC F, ISSN 1401-5757 ; 11047
Database and Modeling of Field Test Data from Lithium Ion Batteries in Hybrid Electrical Vehicles
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:uu:diva-168468OAI: oai:DiVA.org:uu-168468DiVA: diva2:497894
Master Programme in Engineering Physics
2011-10-04, 13167, Ångströmlaboratoriet, Uppsala, 10:45 (Swedish)
Gustafsson, Torbjörn, DocentNyberg, Tomas