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%.

Αυτή η διπλωματική εργασία παραθέτει όλα τα στοιχεία που χρειάζονται για την εξέλιξη ενός συμβατικού κινητήρα εσωτερικής καύσης σε υβριδικό κινητήρα καύσης υδρογόνου. Στο δεύτερο κεφάλαιο περιγράφεται η λειτουργία ενός συμβατικού βενζινοκινητήρα. Στο τρίτο κεφάλαιο περιγράφονται οι ιδιότητες του υδρογόνου και η λειτουργία ενός ηλεκτρικού υβριδικού οχήματος και η τοπολογία που θα χρησιμοποιηθεί στην μοντελοποίηση. Στο τέταρτο κεφάλαιο αναλύονται τα επιμέρους στοιχεία που πρέπει να μεταβληθούν σε έναν βενζινοκινητήρα για να γίνει καύσης υδρογόνου. Τέλος στο πέμπτο κεφάλαιο παρατίθεται το μοντέλο του υβριδικού κινητήρα σε Simulink και εξηγείται η λειτουργία του. / This diploma thesis indicates all the structural elements that are needed for the development of a conventional internal combustion engine into a hybrid electric vehicle with a hydrogen combustion engine.The second chapter is about description and main functions of a conventional gasoline engine.In the third chapter are discribed the properties of hydrogen for use in a combustion engine, the main function of a hybrid electric vehicle and the structure that will be used into the modelling.In the forth chapter are analysed the further structural elements that have to be changed in an internal combustion engine in order to be fueled with hydrogen.Finally in the fifth chapter a model of a hybrid electric vehicle with a hydrogen combustion engine in Simulink is described and the main functions of it are described along with certain results.