Abstract: A charging control method of a vehicle includes setting reserved charging, closing a first switch in an on-board charger (OBC) controller, measuring an input voltage at an input side of the OBC controller when an external charger supplies power when the first switch is closed, setting a charging start time based on the measured input voltage, and starting charging of a battery when the charging start time is reached.

Abstract: A vehicle capable of more efficiently performing reserved charging and a charging control method thereof are disclosed. A charging control method of a vehicle including an electric motor and a battery for driving the electric motor includes setting reserved charging, setting a first charging start time on the assumption that an input voltage of an external charger is a first voltage, and starting charging of the battery when the first charging start time is reached. Upon determination that a second voltage which is an actual input voltage of the external charger is different from the first voltage, a second charging start time is set in consideration of the second voltage and estimated input current. Upon determination that the second charging start time is set, the battery is normally charged when the second charging start time is reached.

Abstract: A method and system for controlling a battery SOC of a hybrid vehicle are provided to improve fuel efficiency in an urban area with a differentiated strategy for controlling auxiliary battery SOC balance of the hybrid vehicle. The method improves fuel efficiency in urban areas with a differentiated strategy of controlling SOC balance of an auxiliary battery considering that the degree of influence of electric field load consumption on fuel efficiency based on LDC voltage adjustment in the hybrid vehicle varies based on driving mode and road gradient.

Abstract: A charging control method and system for an electric vehicle are provided. The charging control method includes monitoring, by a controller, a state of an auxiliary battery including a state of charge (SOC), temperature, and charging current of the auxiliary battery. A charging mode of the electric vehicle is then determined based on the monitored state of the auxiliary battery. A charging voltage of the auxiliary battery is set based on the monitored SOC and temperature of the auxiliary battery and then the auxiliary battery is charged with the set charging voltage.

Abstract: A method and an apparatus are provided for controlling an output voltage of a direct current (DC) converter for a vehicle including a driving motor. The apparatus of controlling an output voltage of a DC converter for a vehicle including a driving motor includes a data detector that is configured to detect data for adjusting the output voltage of the DC converter and a controller that is configured to adjust the output voltage of the DC converter based on the data.

Abstract: A method for controlling an output of an LDC converter of a vehicle is provided. The LDC charges and discharges an auxiliary battery supplying power to an electronic load using a high voltage battery for driving the vehicle. The method includes predicting a driving event of a front section of the vehicle based on driving route information and a SOC of the auxiliary battery in a driving event before the driving event of the front section of the vehicle. Output voltage of the low voltage DC-DC converter is converted and output to the electronic load or the auxiliary battery based on a comparison result between a current SOC of the auxiliary battery and the predicted SOC of the auxiliary battery. The predicted SOC is determined by a charge time of when a brake or accelerator pedal is engaged before the driving event of the front section of the vehicle.

Abstract: A system and method for controlling a low-voltage DC-DC converter (LDC) voltage of a hybrid vehicle are provided. The LDC voltage is optimally adjusted based on which driving mode the vehicle enters, thereby improving fuel efficiency. The method includes determining whether the hybrid vehicle is driven in a regenerative braking mode and whether a value of a state of charge (SOC) of an auxiliary battery is equal to or greater than a first critical value set as a value when charging of the auxiliary battery is unnecessary during the driving in the regenerative braking mode. When the value of the SOC of the auxiliary battery is equal to or greater than the predetermined first critical value, the driving mode is switched from the regenerative braking mode to an electric vehicle (EV) mode, and to variably adjust an LDC target voltage in the EV mode.

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.

Abstract: A low power DC-DC converter (LDC) control circuit is provided and includes a detector, a storage, and an LDC. The detector detects an output voltage of the LDC and characteristic factors in a vehicle. The storage receives the characteristic factors and cumulatively stores the characteristic factors. The LDC controller initializes the characteristic factors cumulatively stored in the storage when a state of charge (SOC) of a battery of the vehicle is maintained to a preset value for a preset time while the LDC output voltage is maintained to be the same as in a refresh operation.

Abstract: A method and system are provided for variably adjusted voltage of the LDC applied with an IBS (Intelligent Battery Sensor). The LDC output voltage control mode is determined in each of three driving modes, and the high electric loads are separated into two or more groups. The LDC output voltage value and the order priority are differentiated based on the durability of the auxiliary battery. Additionally, an LDC output voltage order table is generated according to the driving mode and the SOC state based on the auxiliary battery SOC information obtained from an IBS. Thus, consumed energy of the LDC and an energy consumption amount of the auxiliary battery are minimized, thus improving fuel efficiency.

Abstract: A method of controlling a low voltage DC-DC converter (LDC) of an environmentally-friendly vehicle includes measuring load current consumed by electric loads of the vehicle; identifying a state of an auxiliary battery vehicle; and when the load current is smaller than a predetermined value, and the state of the auxiliary battery is equal to or greater than a predetermined value, performing a first eco mode of stopping operation of the LDC for a predetermined time, and causing the auxiliary battery to supply the current necessary for the electric loads.

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.