The supercapacitor prototypes manufactured with the battery process present a high level of performance both in terms of energy and power. The power capability and the energy efficiency of these supercapacitors were mainly controlled by the electrode realization instead of the basic properties of the carbons. So referring to the battery structure, the internal connections and thc current collectors have to be improved. Improvements are also possible by using the thin electrode process of the lithium carbon batteries and new high capacitance (>120 F/g) activated carbons. On these basis, prismatic 1 kW, 3000 F supercapacitors will be designed and manufactured to serve as units in a capacitor bank for the electric vehicle. The power train system architecture with the previously developed supercapacitors was modelled and its performance was simulated with reference to ECE 15 urban and suburban cycles. The comparison between the total energy consumption of a standard system without supercapacitor and the new system with a supercapacitor outlined a possible energy reduction in the range from 20 % to 40 %. A test rig to evaluate in a reduced scale the functional behaviour of a system battery supercapacitor was defined and manufactured. This scale down system is conceived to reproduce an electrical configuration corresponding to full voltage and 1/60 current ratio with respect to the full scale system. The experimental test rig will allow to validate the mathematical model and to confirm the expected improvements. Tests are in progress.
Development and test of supercapacitors based on liquid organic electrolytes for the electric vehicle
Entwicklung und Test von Superkondensatoren auf der Grundlage von flüssigen, organischen Elektrolyten für den Einsatz in Elektrofahrzeugen
1994
11 Seiten, 8 Bilder, 1 Tabelle
Conference paper
English
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