Battery defect screening device and method

Abstract

A battery defect screening device including a battery fixer for fixing a battery, a discharger, a charger, a voltmeter for measuring an initial voltage value, a first voltage value, and a second voltage value, and a defect screener for determining the battery to be normal when a first voltage change value, which is obtained by subtracting the first voltage value from the initial voltage value, is less than a first reference value, to have a hard short due to the foreign material when the first voltage change value is greater than the first reference value, to be normal when a second voltage change value, which is obtained by subtracting the second voltage value from the initial voltage value, is less than a second reference value, and to have a soft short due to the foreign material when the second voltage change value is greater than the second reference value.