To provide an apparatus and a method for detecting anomalies of a battery voltage detection device and capable of accurately detecting anomalies of the battery voltage detection device.
The battery voltage detection device 50 includes both a capacitative element C1 connected to a battery block B1 in parallel via power lines PL1 and PL2 according to the conduction of switching circuits SW1 and SW2 and a voltage detection part for detecting an inter-terminal voltage Vc of the capacitative element C1 to be supplied with a battery voltage Vb1 from the battery block B1 and charged. A detection device anomaly detection part 36 is provided with both an inter-terminal voltage acquisition part for acquiring the detected inter-terminal voltage Vc of the capacitative element and an anomaly determination part for determining anomalies of the battery voltage detection device 50 on the basis of a time constant in temporal changes of the acquired inter-terminal voltage Vc of the capacitative element C1.
COPYRIGHT: (C)2008,JPO&INPIT
Toshio Morita
Tadashi Muto