PROBLEM TO BE SOLVED: To provide a charge amount calculation device, a computer program, and a charge amount calculation method which can precisely calculate the charge amount of a secondary battery if a charge and discharge current flows through the secondary battery.SOLUTION: The charge amount calculation device includes: a voltage acquisition part for acquiring a voltage of a secondary battery; a current acquisition part for acquiring a current of the secondary battery; a first calculation part for calculating a first charge amount of the secondary battery by integrating the acquired currents; a second calculation part for calculating a second charge amount of the secondary battery, based on the acquired voltage and current and an equivalent circuit model of the secondary battery; a charge amount difference calculation part for calculating the difference between the first and second charge amounts; a condition determination unit for determining whether a predetermined condition is satisfied, based on the calculated difference in the charge amount; and a correction part for correcting the first charge amount, based on the second charge amount if the predetermined condition is satisfied.SELECTED DRAWING: Figure 2
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