| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage detector capable of improving detection accuracy of a discharge voltage of a battery cell.SOLUTION: A voltage detector comprises: a discharge circuit; and voltage detection units D, M. The discharge circuit comprises: at least one battery cell C; a bypass resistor disposed in parallel to the at least one battery cell; and a switching element SW allowing the bypass resistor to discharge the at least one battery cell. The voltage detection unit D is capable of detecting a voltage across the bypass resistor as a detection voltage. When the discharge circuit discharges the at least one battery cell, the voltage detection unit M corrects the detection voltage Vad on the basis of previous voltage drop properties of the discharge circuit (a voltage drop coefficient α measured from an experimental discharge state voltage Vdis and an experimental non-discharge state voltage Vnon of the at least one battery cell), and determines a discharge voltage Vcell of the at least one battery cell.SELECTED DRAWING: Figure 2 |
