INTERNAL RESISTANCE CALCULATION DEVICE, METHOD FOR CALCULATING INTERNAL RESISTANCE, AND INTERNAL RESISTANCE CALCULATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an internal resistance calculation device which can accurately calculate an internal resistance even if there is a rapid change in a current or a voltage.SOLUTION: The present invention relates to an internal resistance calculation device for calculating the internal resistance of a secondary battery connected to a plurality of cells. The internal resistance calculation device includes: a current measuring unit for measuring a current of a secondary battery; a cell voltage measuring unit for measuring the voltage of each cell; a total voltage acquisition unit for measuring and acquiring the total voltage of the secondary battery; and an internal resistance calculation unit for calculating the internal voltage of the secondary battery at a predetermined timing on the basis of the current measured by the current measuring unit and the total voltage acquired by the total voltage acquisition unit.SELECTED DRAWING: Figure 2