Patent ID: 9722435
Date: 2017-08-01
CPC Classifications: H01M,H02J,Y02E

Claim:
1. A battery charge balancing device, comprising: a charge-measuring unit measuring charge of a plurality of batteries storing power through a plurality of power converters connected with a plurality of input power sources, the batteries comprising at least one of a first, a second, and a third battery, and the power converters comprising at least one of a first, a second, and a third power converter; a mode-conversion parameter calculating unit calculating mode conversion parameters for determining whether to operate a power conversion mode or a balancing mode, the power conversion mode activating the power converters to convert power from the input power sources and to store the converted power to the batteries and the balancing mode balancing charge between the batteries in a manner complementary charging and discharging between the batteries; and a control unit controlling power transmission path of the power converters by switching a plurality of switches connected between the power converters and the batteries in accordance with the calculated mode conversion parameters, wherein the control unit selectively operates to activate the power conversion mode or to activate the balancing mode according to the calculated conversion parameters depending on whether or not the conversion parameters corresponding to the power conversion mode or corresponding to the balancing mode and wherein the selective operation by the control unit associated with whether activating the power conversion mode or the balancing mode further comprises: in response to detection of the calculated mode conversion parameters corresponding to parameters for the power conversion mode, the control unit, by controlling the switches, operates the power converters in the power conversion mode in which the power converters convert power from the input power sources and store the converted power to the batteries; in response to detection of the calculated mode conversion parameters corresponding to parameters for the balancing mode, the control unit, by controlling the switches, operates the power converters in the balancing mode by connecting the first battery of the first power converter with the second power converter and connecting the second battery of the second power converter with the third power converter.