Energy storage system using a series connection of supercapacitors, with an active device for equalizing the voltages
An energy storage system based on battery and supercapacitors is presented. It allows bigger amount of intantaneous power. The properties of the proposed system are oriented in high efficiency, in a special topology with parallel channels. The paper presents also an active sharing device, for equalizing the voltages across a series connection of supercapacitor. Based on a buck-boost topology, this device ensures an optimal value for the stored energy, with a high equalizingciency.