| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for measuring the voltages of an assembled battery and capable of correcting variations in a measured voltage which occur by variations in a voltage for A/D conversion and performing highly accurate voltage detection. SOLUTION: The apparatus for measuring the voltages of assembled batteries comprises first to fifth ICs (21)-(25) for voltage detection for detecting the voltage of each of blocks 61-65 containing a plurality of unit cells; an A/D converter provided for each IC for voltage detection for converting analog voltage signals detected by each IC for voltage detection into digital form through the use of a prescribed voltage for A/D conversion; a sample voltage generating circuit 41 provided for each IC for voltage detection for generating a sample voltage having temperature characteristics; and temperature sensors 81-85 for detecting the temperature of each IC for voltage detection. An error ratio of the measured voltage is detected on the basis of voltage signals Vf1 acquired by converting the sample voltage from analog to digital form at each IC for voltage detection and a reference value Vft (n) acquired on the basis of temperatures detected by the temperature sensors. COPYRIGHT: (C)2010,JPO&INPIT |
