STABLE POWER SUPPLY DEVICE FOR HIGH VOLTAGE BATTERY SYSTEM

摘要

A stable power supply device for a high voltage battery system in a vehicle enables the voltage of a capacitor in a high voltage component to be gradually increased at an initial stage of ignition, using a heat generating resistor of a temperature raising system mounted to raise the temperature of a battery in the vehicle. Further, the stable power supply device enables a capacitor in a high voltage component to be discharged using a heat generating resistor of a temperature raising system after the ignition of the vehicle is off, thereby ensuring the stability of the system.

主权项

1. A stable power supply device for a high voltage battery system in a vehicle, the stable power supply device comprising:
a heat generating resistor portion connected to a high voltage battery through a power relay assembly constituted of one or more relays; a first branch circuit branched from a circuit between the high voltage battery and the power relay assembly to be connected to a circuit between the heat generating resistor portion and the power relay assembly; a precharge heat generating resistor installed in the first branch circuit, the precharge heat generating resistor preventing a sudden flow of current by delaying an increase in voltage at an initial stage of ignition; a high voltage component installed in a second branch circuit branched from an internal circuit of the power relay assembly, the high voltage component having a capacitor connected to the internal circuit of the power relay assembly; and a control unit connected to the power relay assembly to control an operation of each relay constituting the power relay assembly.