Control method and system of low-voltage DC-DC converter for hybrid vehicle
AssigneeHyundai Motor Company
InventorsDong Jun Shin, Ho Joong Lee
Life of this patent
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Abstract
A method of controlling a low-voltage DC-DC converter for a hybrid vehicle is provided. The method includes determining whether an intelligent battery system fails and analyzing a failure cause of the intelligent battery system when the intelligent battery system is determined to fail. A first voltage is deduced using a battery temperature when the failure cause is determined to be a detection failure of battery SOC and an output voltage of a low-voltage DC-DC converter is adjusted to be the first voltage.
Claims10
A method of controlling a low-voltage direct current-direct current (DC-DC) converter for a hybrid vehicle, comprising:
- determining, by a controller, whether an intelligent battery system fails;
- analyzing, by the controller, a failure cause of the intelligent battery system when the intelligent battery system is determined to fail;
- deducing, by the controller, a first voltage using a battery temperature when the failure cause is determined to be a detection failure of battery state of charge (SOC);
- and
- adjusting, by the controller, an output voltage of a low-voltage DC-DC converter to be the first voltage,
- wherein the intelligent battery system is configured to detect the state of the vehicle battery, a current, a voltage, a temperature, and a state of charge (SOC) of the battery.
A low-voltage DC-DC converter system for a hybrid vehicle, comprising:
- a battery;
- a low-voltage DC-DC converter configured to output a charging voltage of the battery;
- an intelligent battery system configured to detect the state of the vehicle battery, a current, a voltage, a temperature, and a state of charge (SOC) of the battery;
- and
- a controller configured to determine whether the intelligent battery system fails, to analyze a failure cause of the intelligent battery system when the intelligent battery system is determined to fail, and to deduce a first voltage using a battery temperature to adjust the first voltage to be an output voltage of the low-voltage DC-DC converter when the failure cause is determined to be a detection failure of battery SOC.
Dependencies are inferred from the claim text.