| 摘要 |
A voltage detecting device for battery modules can reduce the difference in frequency response of an anti-aliasing filter (12) for each battery module whose voltage is measured, and provide an accurate voltage measurement. The voltage detecting device for battery modules includes a plurality of switches connected to battery modules constituting a secondary battery (11), resistors having an equal resistance value, and a filter composed of capacitors (Co1) having equal capacitance and being disposed between the battery modules and the switches. The capacitors (Co1) are divided into a first capacitor group and a second capacitor group which are symmetrical at the center of the secondary battery (11). The first capacitor group is on the positive terminal side of the second battery. The second capacitor (Co1) is on the negative terminal side of the secondary battery (11).
|
