VOLTAGE MONITORING DEVICE

摘要

A voltage monitoring device has a capacitor circuit having capacitors connected in series, first switches connecting end terminals of the capacitor circuit to specific electrode terminals of unit cells in a battery pack, second switches connecting remaining electrode terminals of the unit cells to the connection nodes between the capacitors, first voltage detection sections corresponding to each of the capacitors, a second voltage detection section connected to the end terminals of the capacitor circuit, and a microcomputer which selectively performs a first process of charging each capacitor, and a second process of charging the capacitors simultaneously. The respective specific electrode terminals correspond to the unit cells, and are arranged at an interval corresponding to the number of connection nodes formed between the capacitors. The microcomputer performs a polarity switching process of adjusting for the adjacent capacitors to have a same polarity of the charged voltage before performing the second process.

主权项

1. A voltage monitoring device capable of monitoring a voltage of each of unit cells forming a battery pack on a basis of first voltage detection sections and a second voltage detection section, comprising:
a capacitor circuit comprising a plurality of capacitors connected in series; a plurality of first switches connecting both end terminals of the capacitor circuit having the capacitors connected in series to specific electrode terminals in electrode terminals of the unit cells of the battery pack, the specific electrode terminals corresponding to respective unit cells arranged in the battery pack at intervals, corresponding to the number of connection nodes formed between the capacitors; a plurality of second switches connecting remaining electrode terminals of the unit cells, other than the specific electrode terminals of the unit cells, to the connection ends of the connection nodes between the capacitors connected in series; the first voltage detection sections corresponding to each of the capacitors connected in series; the second voltage detection section connected to the end terminals of the capacitor circuit; a charging control section capable of selecting and performing a first process and a second process, the first process charging each of the capacitors through the first switches and the second switches, and the second process disconnecting the second switches, connecting the first switches, and charging the capacitors simultaneously through the first switches; and a polarity switching section capable of performing a polarity switching process of adjusting the capacitors arranged adjacent to each other to have the same polarity of the charged voltage before performing the second process.