METHOD FOR RECOGNIZING BATTERY

摘要

PROBLEM TO BE SOLVED: To recognize the substantial soundness of a battery and to prepare for backup at the time of an unexpected power cut by connecting a simulated load to the battery during an operation by main power. SOLUTION: When a load from a non-load state is connected to a battery, a certain degree of time is required until a system is restored to normal voltage. Voltage is detected by using the characteristic and soundness is recognized. A time monitoring circuit 003 issues a monitoring request at prescribed time, and a time monitoring circuit 004 pulse-outputs the time restoration hour/minute of the battery. When the time monitoring circuit 004 receives the voltage recognition request of the battery from the time monitoring circuit 003, it pulse-outputs the conduction request signal of the voltage restoration hour/minute of the battery to a switch 005. The switch 005 connects a simulated load to the battery by the conduction request signal. Battery voltage when the pulse output of the time monitoring circuit 004 is turned off is detected and it is held in a flip flop 006. Thus, the soundness of the battery is recognized based on the result.