SYSTEM AND METHOD FOR PERIODICALLY CHARGING SUB-BATTERY FOR ELECTRIC VEHICLE

摘要

Provided is a system method for periodically charging a sub-battery for an electric vehicle. In this method, an SOC self-discharge rate of the sub-battery is calculated. An LDC output voltage and a charging time of the sub-battery are set using the SOC self-discharge rate of the sub-battery and information received from an IBS. It is determined whether or not an SOC of a main battery is equal to or greater than a set value. Periodic charging is performed on the sub-battery through an operation of an LDC when the SOC of the main battery is equal to or greater than the set value.

主权项

1. A method for periodically charging a sub-battery for an electric vehicle, comprising:
calculating, by a controller, a State of Charge (SOC) self-discharge rate of the sub-battery; setting, by the controller, a Low Voltage DC-DC Converter (LDC) output voltage and a charging time of the sub-battery using the SOC self-discharge rate of the sub-battery and information received from an Intelligent Battery Sensor (IBS); determining, by the controller, whether or not an SOC of a main battery is equal to or greater than a set value; and performing, by the controller, periodic charging of the sub-battery through an operation of an LDC when the SOC of the main battery is equal to or greater than the set value.