A research group at the Berlin University of Technology is engaged with the applications of Ultra Capacitors (UC) in automotive systems. Today Ultra Capacitors have the disadvantage of a too small operation area regarding the voltages and very low voltage levels of a single module. This leads to series connections of Ultra Capacitors which needs a high dynamic energy management to guarantee the lifetime. A management system for a 42 V power net storage block is under development which includes a protection strategy for the Ultra Capacitors. The concept includes the handling of Peak Power Assistance (400 A at voltages levels from 40 V to 56 V) in combination with a DC/DC converter based (for a better utilization of the stored energy) delivery of medium power (100 A at steady 42 V). Regarding to easy-to-handle requirements the block has only a CAN bus interface and the power connector. The Paper includes a detailed description and the test results of several UC storages in different power classes.
Ultra capacitor storages for automotive applications
Ultrakapazitäten für den Einsatz im Fahrzeug
2002
9 Seiten, 15 Bilder, 1 Quelle
Conference paper
Storage medium
English
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