SYSTEM AND METHOD FOR POWER SUPPLY OF ON BOARD CHARGER

• Main Authors: KONG, HUN, LEE, DONG JUN, CHOE, GYU YEONG, KANG, GUN SOO
• Format: Patent
• Language: English; Korean
• Published: 17.09.2014
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; SYSTEMS FOR STORING ELECTRIC ENERGY; TRANSPORTING; VEHICLES IN GENERAL

Disclosed are a system and a method to supply battery power for a high voltage battery. According to an embodiment of the present invention, the system to supply battery power for a high voltage battery comprises: a charger to convert external alternating current power to direct current power for a charge, and charge a high voltage battery of an eco-friendly vehicle; a charge control unit to receive power to control a charge of the high voltage battery to control drive of the charger; an auxiliary battery to supply first voltage direct current power to drive the charge control unit; and a power supply unit to generate second voltage direct current power greater than the first voltage direct current power using the external alternating current power and supply the generated second voltage direct current power as driving power to control the charge of the charge control unit. A first diode and a second diode are respectively installed in an output terminal of the power supply unit and an output terminal of the auxiliary battery, wherein a cathode voltage of the second diode is raised and the first voltage direct current power of the auxiliary battery is blocked due to diode properties when the second voltage direct current power is supplied by the power supply unit.