Patent ID: 7982593

Claim:
An alarm device of a vehicle battery for monitoring voltage ranges in charging and discharging processes of the vehicle battery, comprising: an alarm device electrically connected to the vehicle battery ( 20 ) and having a power end for wiring to at least one charger ( 30 ) and one load ( 40 ) respectively, further comprising: a sampling circuit having a first detecting end for over-current detection to the load ( 40 ) and a second detecting end for over-charge detection to the charger ( 30 ); the sampling circuit detecting charging/discharging voltage to the vehicle battery ( 20 ) through the first detection end and the second detecting end real time so as to monitor the voltage ranges of the vehicle battery ( 20 ) in charging and discharging; an alert unit actuated by one of signals from the first detecting end and the second detecting end; and wherein above assemblies serve to monitor the voltages in charging and discharging so as to control battery status.