Abstract: A method for calibrating a coulomb counting based state-of-charge (SOC) estimation of a battery cell includes: determining whether the battery cell is in a specific charge state; calibrating an initial value for use in the coulomb counting based SOC estimation according to an open circuit voltage (OCV)-based SOC of the battery cell if the battery cell is not in the specific charge state; calibrating the initial value according to a predetermined value if the battery cell is in the specific charge state; and applying the calibrated initial value to the coulomb counting based SOC estimation and restarting an integration of the coulomb counting based SOC estimation based on the calibrated initial value.

Abstract: A method for calibrating a coulomb counting based state-of-charge (SOC) estimation of a battery cell includes: determining whether the battery cell is in a specific charge state; calibrating an initial value for use in the coulomb counting based SOC estimation according to an open circuit voltage (OCV)-based SOC of the battery cell if the battery cell is not in the specific charge state; calibrating the initial value according to a predetermined value if the battery cell is in the specific charge state; and applying the calibrated initial value to the coulomb counting based SOC estimation and restarting an integration of the coulomb counting based SOC estimation based on the calibrated initial value.

Abstract: A method capable of accurately estimating a power percentage of a battery includes: performing a first fuel gauge operation to measure a power percentage of the battery to generate first information; performing a second fuel gauge operation to measure the power percentage of the battery to generate second information, the first fuel gauge operation being different from the second fuel gauge operation; and, dynamically determining one among at least the first percentage and the second percentage as the power percentage of the battery.

Abstract: Methods are provided to be able to efficiently and precisely estimate/predict an available capacity of a battery. One method is arranged to estimate/predict the available capacity of the battery according to a first battery percentage result, a second battery percentage result, and a calculated power when the battery is being operated or used within a specific operating range distinct from a normal operating range. Another method is arranged to estimate the available capacity by measuring battery's internal resistance and referencing a precise battery aging model.

Abstract: Battery equalization circuits for series charging/discharging and controlling methods thereof are provided. The provided circuit includes a set of series-connected batteries, a switching converter and a magnetic element coupled balance circuit including a magnetic element coupled to the switching converter, wherein the magnetic element takes a branch current from the switching converter to the series-connected batteries so as to cause the set of series-connected batteries to reach a balance.