Patent ID: 8013618

Claim:
A voltage detection apparatus, comprising: a battery including a plurality of unit cells mutually connected in series; a first block including at least one of the plurality of unit cells; a second block including at least one of the plurality of unit cells, and provided adjacent to the first block; a first voltage detector connected to the first block, which detects a voltage between both ends of the unit cell in the first block, and which includes: a first current source; a first current detection element connected to the first current source; and a first voltage measuring unit which detects a first voltage between both ends of the first current detection element; a second voltage detector connected to the second block, which detects a voltage between both ends of the unit cell in the second block, and which includes: a second current source; a second current detection element connected to the second current source, and connected to the first current detection element; and a second voltage measuring unit which detects a second voltage between both ends of the second current detection element; and an abnormality detector which detects an abnormality of the first and second voltage detectors in accordance with the first voltage and the second voltage.