Patent ID: 8278878
Filing Date: 2012-10-02
Classification: G01R

Abstract:
1. A voltage detection apparatus, comprising: a battery including a plurality of unit cells mutually connected in series; a plurality of blocks, each block including at least one of the plurality of unit cells; a plurality of voltage detectors, each detector connected to respective one of the blocks, and detecting a voltage between both ends of the unit cell in the one of the blocks; a plurality of reference power sources, each source connected to respective one of the voltage detectors, and at least one of the reference power sources having higher accuracy than the other reference power sources; a plurality of current detecting circuits; each of the current detecting circuits connected to at least two adjacent voltage detectors, wherein each of the current detecting circuits comprises a first current detecting element, a second current detecting element, and a voltage regulating element connected between the first current detecting element and the second current detecting element, the first and the second current detecting elements receiving currents from the at least two voltage detectors to which they are connected to detect a voltage between both ends of the first current detecting element and a voltage between both ends of the second current detecting element; and a correcting unit which corrects a detection result of the voltage detector which is connected to the other reference power source on the basis of a detection result of the voltage detector which is connected to the reference power source with the higher accuracy.