BATTERY CELL BALANCING CIRCUIT USING LC SERIAL RESONANCE

摘要

The present invention relates to a technology capable of improving the use time of a battery cell by generally or individually controlling charge or discharge with respect to a multi-battery cell by using LC serial resonance in a module with a multi-battery cell structure. To this end, the present invention includes a battery module including a plurality of serially connected battery cells, a serial resonant circuit including serially connected inductor and capacitor and performing a serial resonant function, and first to third switch units that set an electric energy collection path and an electric energy supply path between the battery module and the serial resonant circuit.

主权项

1. A battery cell balancing circuit using LC serial resonance and performing battery cell balancing, comprising:
a battery module including a plurality of serially connected battery cells; a serial resonant circuit including serially connected inductor and capacitor and performing a serial resonant function; a first switch unit including a plurality of switches each connected between each terminal of the plurality of battery cells and a first common node in order to provide a path for collecting electric energy charged in one or more battery cells of the plurality of battery cells and storing the electric energy in the capacitor, or for supplying the electric energy collected and stored in the capacitor to the one or more battery cells; a second switch unit including a plurality of switches each connected between each terminal of the plurality of battery cells and a second common node in order to provide the path for supplying the electric energy collected and stored in the capacitor to the one or more battery cells, or for collecting the electric energy charged in the one or more battery cells; and a third switch unit including a plurality of switches connected between the first common node and both terminals of the serial resonant circuit and switches connected between the second common node and both terminals of the serial resonant circuit in order to provide the path for collecting the electric energy charged in the one or more battery cells of the plurality of battery cells, or for supplying the electric energy collected and stored in the capacitor to the one or more battery cells.