| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery device, configured to supply power to a load while an external power supply is off, which accurately determines a battery voltage while the external power supply is off. <P>SOLUTION: The battery device includes: a comparator U2 for outputting an anomaly signal when a voltage Va of a first battery B1 is lower than a reference voltage Vo while the external power supply is off; a peak hold circuit 6 for holding the anomaly from the comparator U2; and alarm means 7 for issuing an external anomaly alarm in response to the signal held by the peak hold circuit 6. The voltage of the first battery B1 can thus be determined while the external power supply is off. Even if the voltage of the battery B1 changes by power supply from an equipment power supply 3 to a control device 2 after the output of the anomaly signal from the comparator U2, the peak hold circuit 6 can hold the signal that the voltage Va is lower than the reference voltage Vo while the external power supply is off, and the alarm means 7 can notifies the outside according to the signal thus held. <P>COPYRIGHT: (C)2012,JPO&INPIT |
