DEVICE AND A METHOD TO PREVENT A LOW VOLTAGE OF BATTERIES FOR VEHICLES, CAPABLE OF EXTENDING THE LIFE SPAN BY BLOCKING A POWER SUPPLY OF AN AUTOMATED MONITORING DEVICE WHEN BEING LOWERED BELOW A PREDETERMINED VOLTAGE AND PROTECTING THE BATTERY

摘要

PURPOSE: A device and a method to prevent a low voltage of batteries for vehicles are provided to prevent the vehicle from not being starting caused by a discharge of battery by blocking a power supply when being lowered below a predetermined voltage for the minimal operation of the vehicle.;CONSTITUTION: A device to prevent a low voltage of batteries for vehicles comprises a battery (10), a direct current switch (18) for selecting +12V or +24V, a hexadecimal rotary switch (30), a DC/DC converter (14), a power monitor, a central processing unit (24), and a power supply control unit. The battery supplies the power to the vehicle. The direct current switch for selecting +12V or +24V selects the +12V or +24V in the device to prevent the low voltage of the battery. The hexadecimal rotary switch previously selects a minimal operational power of the vehicle in the device. The DC/DC converter receives the power supplied from the battery of the vehicle, converts to a power level of DC +5V, and outputs. The power monitor converts an analog signal into a digital signal and outputs. The central processing unit receives the digital signal outputted from the power monitor and measures the outputted voltage. The power supply control unit receives the power outputted from the DC/DC converter and controls the power of an automated monitoring device to supply or block.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Vehicle battery power (DC 12, 24V); (12) External power input terminal; (14) DC/DC converter; (16) Power monitor (power sensing & A/D signal conversion); (18) DC+12V/+24V selection switch; (20) Hexadecimal rotary switch for voltage setting; (22) Operation display LED; (24) Central Process Unit (CPU); (26) Relay control; (28) Relay; (32) Power output terminal for an unmanned monitoring device