SYSTEM AND METHOD FOR PERIODICALLY CHARGING SUB-BATTERY FOR ELECTRIC VEHICLE
First Claim
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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.
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Abstract
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.
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Citations
22 Claims
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1. A method for periodically charging a sub-battery for an electric vehicle, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
a controller configured to calculate a State of Charge (SOC) self-discharge rate of the sub-battery, set 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), determine whether or not an SOC of a main battery is equal to or greater than a set value, and perform 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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
Specification