Patent ID: 8294423
Filing Date: 2012-10-23
Classification: G01R

Abstract:
1. A voltage measuring device for measuring an output voltage of a multiple-set battery having a plurality of unit cells which are connected in series to output a voltage, the voltage measuring device comprising: a current detecting section that detects a charging or discharging current of the multiple-set battery; block voltage detecting sections that detect voltages of a plurality blocks respectively, wherein the unit cells are divided into the blocks; and a control section connected to the block voltage detecting sections via a first communication line and a second communication line and that outputs a voltage measuring request to the block voltage detecting sections via the first communication line to acquire voltage data detected by the block voltage detecting sections, wherein each of the block voltage detecting sections includes: wherein the control section transmits a low-power consumption mode setting signal to the block voltage detecting sections respectively via the second communication line when the charging or discharging current has not been detected by the current detecting section for a first time period; and wherein each of the block voltage detecting sections switches an operating mode from a normal mode where the block voltage detecting section is activated with the power from the active power source to a low-power consumption mode where the block voltage detecting section is activated with the power supplied only from the low-power consumption source when the low-power consumption mode setting signal is received.