Superkondensatorbanksystem und Spannungsausgleichsverfahren des Superkondensatorbanksystems

Details

Veröffentlichungs-Nr.

EP4804375

Anmeldetag

3. März 2025

Veröffentlichung

9. September 2026

Rechtsraum

EP

IPC

H02J7/00, H02J7/34

Abstract

The present invention relates to an electrical energy storage system, particularly to a supercapacitor bank system comprising a plurality of series-connected supercapacitor cells. Further, the present invention relates to a voltage balancing circuit and a voltage balancing method of the supercapacitor bank system. The voltage balancing circuit (100; 200) includes a current controlled AC source (101; 201) configured to supply a controlled balancing current and wherein the current-controlled AC source (101; 201) includes a current-controlled DC-DC conversion circuit (204); a DC-AC conversion circuit (205) and a common AC bus (102; 202); a plurality of module units Mi; and a plurality of supercapacitor cells SCi , wherein all of the plurality of supercapacitor cells SCi are electrically connected in series, each of the plurality of supercapacitor cells SCi being electrically connected and associated with a respective module unit Mi. The voltage balancing circuit (100; 200) is configured to balance the voltage of one or more series-connected supercapacitor cells SCi by conducting the balancing current from supercapacitor bank (104; 207) to supercapacitor cells SCi with a lower voltage over the module units Mi, until all of the supercapacitor cells SCi have the same voltage. The present invention relates also to a voltage balancing method, wherein the voltage balancing circuit (100; 200) and method operate on a principle of applying a current-controlled alternating current source, common AC bus, transformers and rectifying circuits.

Anmelder

Firma

University of Zagreb Faculty of Electrical Engineering and Computing

Land

🇭🇷 Kroatien

Fachgebiete