Patent ID: 8232767
Filing Date: 2012-07-31
Classification: G01R

Abstract:
1. An apparatus for testing batteries, comprising: at least one voltage circuit for measuring voltages of N batteries; at least one resistance circuit, which is separate from the voltage circuit, for decreasing voltages of batteries into the reference voltage by discharging voltages of batteries, which are greater than a reference voltage, among the N batteries; a connection switch unit connected to the N batteries and adapted to select any one of the N batteries; a divert switch unit for separating polarities of each battery connected thereto through the connection switch unit and changing positions of a cathode and an anode of the battery depending on separated polarities; a selection switch unit for selectively connecting the cathode and anode of the battery, separated by the divert switch unit, to a cathode and an anode of the voltage circuit or the resistance circuit; and a control unit for controlling the connection switch unit, the divert switch unit, and the selection switch unit, which controls the resistance circuit and decreases the voltage of battery to the reference voltage by discharging voltage of battery when the voltage measured by the voltage circuit is greater than a reference voltage, whereby the voltage circuit transmits the measured voltage of the N batteries into the above control unit.