Patent ID: 7019489

Claim:
A battery pack capacity adjustment apparatus installed in a vehicle, which executes a capacity adjustment for a battery pack constituted by connecting in series a plurality of cells, comprising: capacity adjustment circuits each provided in correspondence to one of the plurality of cells to execute the capacity adjustment by discharging the corresponding cell when a voltage at the corresponding cell exceeds a predetermined bypass engaging voltage; a voltage variance abnormality detection device that detects a voltage variance abnormality manifesting among the plurality of cells; a vehicle stop predicting device that predicts that the vehicle, which is currently traveling, is to stop; and a charge/discharge control device that controls charge/discharge of the battery pack so as to increase cells with voltages thereof exceeding the predetermined bypass engaging voltage if the voltage variance abnormality detection device detects a voltage variance abnormality among the plurality of cells and the vehicle stop predicting device predicts that the traveling vehicle is to stop.