IMBALANCE DETERMINATION CIRCUIT, POWER SUPPLY DEVICE, AND IMBALANCE DETERMINATION METHOD

摘要

Provided is an imbalance determination circuit configured from a voltage detection section for detecting the respective terminal voltages of a plurality of power storage bodies, a first terminal voltage obtaining section for obtaining the terminal voltages of the respective power storage bodies as a plurality of first terminal voltages during the period in which polarization is produced in the terminal voltages of the respective power storage bodies by the supply of a charging current to the respective power storage bodies, a second terminal voltage obtaining section for obtaining the terminal voltages of the respective power storage bodies as a plurality of second terminal voltages during the period in which the charging is suspended after the obtaining of the first terminal voltages, a voltage variation calculating section for calculating voltage variations in the respective power storage bodies from the plurality of first terminal voltages and the plurality of second terminal voltages, and an imbalance determination section for determining that the imbalance between the power storage amounts of the plurality of power storage bodies is occurring when the differences between the respective voltage variations calculated exceed a preset determination threshold.