DEVICE TO MONITOR VOLTAGE OF STORAGE BATTERY Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: device to monitor voltage of storage battery has supply filter, two comparators which noninverting inputs are connected to source of reference voltage, which inverting inputs are linked to adjustable voltage divider and which outputs are loaded at light emitting diode indication unit. Output of comparator operating at higher voltage of monitored battery is linked through diode-resistor network to inverting input of other comparator, generator based on single-junction transistor and decoupler. Supply voltages of emitter and second base of transistor of generator are fed from outputs of comparators, supply voltage of transistor key is fed from controlled battery through indication unit and decoupler. EFFECT: expanded indication capabilities of device as it shows discharged, undercharged, normally charged and overcharged states of storage battery with the aid of two light emitting diodes of different color of glow. 1 dwg