| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery voltage detection device capable of surely preventing erroneous detection of cell voltage caused by instantaneous fluctuation of power source voltage to improve reliability of the cell voltage detection. <P>SOLUTION: The battery voltage detection device includes: a voltage detection circuit for detecting cell voltage of a battery cell; and a voltage processing section for performing an A/D conversion of output voltage of the voltage detection circuit at a fixed period and collecting cell voltage detection data. The battery voltage detection device further includes a power source voltage monitoring circuit for determining whether or not instantaneous fluctuation of external supply power source voltage is generated and outputting an instantaneous fluctuation detection signal showing the determination result to the voltage processing section. When the generation of the instantaneous fluctuation of the external supply power source voltage is detected based on the instantaneous fluctuation detection signal, the voltage processing section cancels the latest cell voltage detection data. <P>COPYRIGHT: (C)2013,JPO&INPIT |
