Abstract: The present invention relates to a battery module balancing method using a single inductor. The battery module balancing method can balance a plurality of battery cells using a single inductor in each of battery modules having modularized battery cells, and balance the plurality of modules using a single inductor. Thus, the battery module balancing method can reduce the number of balancing operations and raise balancing power, thereby improving balancing efficiency.

Abstract: The present invention relates to a technique for implementing a bidirectional DC-DC converter applied to an energy storage system. The bidirectional DC-DC converter includes a magnetically coupled inductor and a charging/discharging voltage storage unit between a DC link power supply and a battery power supply, and implements a high gain through a two-step voltage transformation process when a charging process or discharging process is performed. Thus, the bidirectional DC-DC converter can reduce the construction cost of the battery cell, guarantee a high voltage available range, and reduce the influence of leakage inductance.

Abstract: The present invention relates to a battery cell balancing circuit for balancing battery cells of a battery pack using a single inductor. The battery cell balancing circuit includes a first access unit, a second access unit and an electrical energy transfer unit for an electrical energy path of a battery pack. The battery cell balancing circuit selectively connects a strong cell or weak cell of the battery pack to a single inductor by controlling switching operations of switches of the first and second access units and the electrical energy transfer unit, thereby performing battery cell balancing. Thus, the power efficiency of the battery pack can be improved, and the size and price thereof can be reduced.

Abstract: The present invention relates to a method for more efficiently performing a balancing operation for a plurality of battery cells of which charges are not equal, in a battery cell balancing circuit using an LC series resonant circuit. The method may include calculating balancing charge for all battery cells of which the charges are not equal, selecting the strongest battery cell storing the highest charge and the weakest battery cell corresponding to the strongest battery cell, among the entire battery cells, and performing a series of balancing operations.

Abstract: 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.

Abstract: The present invention relates to a technique for implementing a bidirectional DC-DC converter applied to an energy storage system. The bidirectional DC-DC converter includes a magnetically coupled inductor and a charging/discharging voltage storage unit between a DC link power supply and a battery power supply, and implements a high gain through a two-step voltage transformation process when a charging process or discharging process is performed. Thus, the bidirectional DC-DC converter can reduce the construction cost of the battery cell, guarantee a high voltage available range, and reduce the influence of leakage inductance.

Abstract: The present invention relates to a technology for implementing a bidirectional DC/DC converter in an ESS (Energy Storage System). According to the present invention, a two-phase interleaving technique and a ZVS (Zero Voltage Switching) cell are used to implement a high-efficiency bidirectional DC/DC converter, high-efficiency energy conversion can be performed through a plurality of voltage transformation processes, ripple can be reduced to stably exchange energy, the interleaving technique is used to reduce input current ripple and output voltage ripple, and conduction loss can be reduced under a relatively high load.

Abstract: The present invention relates to a method for more efficiently performing a balancing operation for a plurality of battery cells of which charges are not equal, in a battery cell balancing circuit using an LC series resonant circuit. The method may include calculating balancing charge for all battery cells of which the charges are not equal, selecting the strongest battery cell storing the highest charge and the weakest battery cell corresponding to the strongest battery cell, among the entire battery cells, and performing a series of balancing operations.

Abstract: A DC-DC converter control circuit with enhanced driving efficiency while securing circuit stability during light-load driving of the DC-DC converter through variation of an on/off duty ratio of a burst mode according to load. The control circuit includes a detection unit for detecting an amount of current and a voltage at an output stage of a DC-DC converter, and generating and outputting a differential voltage according to a level of the detected voltage, a comparison unit for comparing the differential voltage with a reference voltage having a triangle or sawtooth waveform, thereby generating a duty signal, and a converter controller for generating an on/off control signal corresponding to a duty ratio of the duty signal, and supplying the on/off control signal to the DC-DC converter, to control on/off of the DC-DC converter.

Abstract: Provided is a battery cell balancing circuit including: a battery cell module including a plurality of battery cells connected in series; a series resonant circuit including an inductor unit and a capacitor unit which are connected in series so as to store electric energy recovered from a corresponding battery cell of the battery cell module and supply the stored electric energy to a corresponding battery cell of the battery cell module; and a switch unit configured to provide an electric energy recovery path for storing the electric energy recovered from the corresponding battery cell of the battery cell module into the capacitor unit of the series resonant circuit and provide an electric energy supply path for supplying the stored electric energy to the corresponding battery cell of the battery cell module.

Abstract: 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.

Abstract: Provided is a battery cell balancing circuit including: a battery cell module including a plurality of battery cells connected in series; a series resonant circuit including an inductor unit and a capacitor unit which are connected in series so as to store electric energy recovered from a corresponding battery cell of the battery cell module and supply the stored electric energy to a corresponding battery cell of the battery cell module; and a switch unit configured to provide an electric energy recovery path for storing the electric energy recovered from the corresponding battery cell of the battery cell module into the capacitor unit of the series resonant circuit and provide an electric energy supply path for supplying the stored electric energy to the corresponding battery cell of the battery cell module.

Abstract: A DC-DC converter control circuit with enhanced driving efficiency while securing circuit stability during light-load driving of the DC-DC converter through variation of an on/off duty ratio of a burst mode according to load. The control circuit includes a detection unit for detecting an amount of current and a voltage at an output stage of a DC-DC converter, and generating and outputting a differential voltage according to a level of the detected voltage, a comparison unit for comparing the differential voltage with a reference voltage having a triangle or sawtooth waveform, thereby generating a duty signal, and a converter controller for generating an on/off control signal corresponding to a duty ratio of the duty signal, and supplying the on/off control signal to the DC-DC converter, to control on/off of the DC-DC converter.

Abstract: Disclosed herein are a DC-DC boost converter circuit, which is capable of preventing power loss and stabilizing switching elements by implementing soft switching and improving efficiency by adding a charge pumping function, and a method for driving the same. The DC-DC boost converter circuit, in which an inductor and an output diode are connected in series and an output capacitor and a load are connected to an output port of the output diode in parallel, includes an output stabilization circuit in which first and second switching elements, a transformer, a plurality of boost capacitors, and a plurality of diodes are connected in series/parallel between the inductor and the output diode.

Abstract: A backlight unit, with a parallel configuration of plural lamps, having improved reliability is disclosed. The backlight unit driver includes: first and second lamps connected parallel to each other; a DC/AC inversion portion inverting a DC voltage into an AC voltage to apply the AC voltage to the lamps; a transformer transforming the AC voltage from the DC/AC inversion portion; a positive polarity AC signal compensator compensating an electric current difference between the first and second lamps using positive polarity AC signals from the first and second lamps; and a negative polarity AC signal compensator compensating the electric current difference between the first and second lamps using negative polarity AC signals from the first and second lamps.

Abstract: The present invention relates to a method and apparatus for driving a plasma display panel that can be driven at a low voltage and prevent undesired discharge from being generated under high temperature environment.

Abstract: The present invention relates to a method and apparatus for driving a plasma display panel that can be driven at a low voltage and prevent undesired discharge from being generated under high temperature environment.

Abstract: The present invention relates to a method and apparatus for driving a plasma display panel that can be driven at a low voltage and prevent undesired discharge from being generated under high temperature environment.

Abstract: The present invention relates to a method and apparatus for driving a plasma display panel that can be driven at a low voltage and prevent undesired discharge from being generated under high temperature environment.

Abstract: Disclosed herein are a DC-DC boost converter circuit, which is capable of preventing power loss and stabilizing switching elements by implementing soft switching and improving efficiency by adding a charge pumping function, and a method for driving the same. The DC-DC boost converter circuit, in which an inductor and an output diode are connected in series and an output capacitor and a load are connected to an output port of the output diode in parallel, includes an output stabilization circuit in which first and second switching elements, a transformer, a plurality of boost capacitors, and a plurality of diodes are connected in series/parallel between the inductor and the output diode.