In this paper a research project at the Siemens AG Technical Academy of Berlin, started in January 2001 will be described. The project focuses on the development of an energy management system for light electric vehicles (LEV), introducing latest technology. A power-assist system (Ultracaps) has to be added to a battery powered LEV. An energy management system to control both sources has to be developed. The Ultracaps used in this project have a capacity of 1200F per cell and are manufactured by EPCOS AG, Munich. 18 cells are connected in series and mounted in a case, resulting in a module capacity of 67F/42V. In that project, as an option, two of these modules can be used. In this case they are connected in parallel due to the voltage requirements of the vehicle. These modules have been designed especially for applications in the new 42V powernet being introduced to internal combustion engine vehicles (ICE) in the near future. The energy management system (EMS) described in this paper controls the flow of energy through the Ultracaps. The behavior of the ultracaps has been measured under different testing conditions on a test bench. Therefore a test bench has been developed allowing discharge currents up to 4kW continuous power, 600A maximum discharge current, 200A constant charging current. The source as well as the sink are parametrized either by a PC or a special microcontroller/DSP. The microcontroller controlling the energy management system is the new 32-Bit TriCore TC 1775-B (Audo) Controller from Infineon Technologies AG. It has been designed especially for automotive applications, such as engine management. The bench is controlled by a 80C164 Microcontroller.
Ultracaps in power-assist applications in battery powered electric vehicles - implications on energy management systems
Ultracaps als zusätzlicher Energiespeicher für Batterie versorgte Elektrofahrzeuge - Einfluß auf das Energiebetriebssystem
2001
11 Seiten, 17 Bilder, 7 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
Ultracaps in power-assist applications in Battery Powered Electric Veh
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