Patent ID: 8643324
Filing Date: 2014-02-04
Classification: B60R,H02J

Abstract:
1. A portable auxiliary power-source device for a vehicle comprising: an input unit which is input with an external power; a charging circuit unit which increases a voltage of the power input through the input unit; a battery unit which is input with the power of which the voltage is increased by the charging circuit to be charged and outputs the charged power at a needed time; a voltage dropper which decreases a voltage of the power output from the battery unit; a discharging circuit unit which limits a current of the power output from the battery unit; a first output unit which is input with the power output from the discharging circuit and outputs the power; a second output unit which is input with the power output from the voltage dropper and output the power; and a protection circuit unit which has a function of disconnecting a circuit according to a state of the battery unit so as to prevent an incorrect operation of the battery unit: wherein the discharging circuit unit includes: a discharging current comparative voltage generator which generates a comparative voltage; a discharging current comparator which compares a voltage measured from the applied power with the comparative voltage; and a discharging current controller which limits a current output from discharging current comparator.