Method and system for controlling battery SOC of hybrid vehicle
AssigneeHyundai Motor Company
InventorsDong Jun Shin, Ho Joong Lee, Dong Su Ha, Chang Ryeol Yoo, Jun Yeon Park
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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.
Claims16
A method for controlling a battery state of charge (SOC) of a hybrid vehicle, comprising:
- determining, by a controller, a driving load of the vehicle based on driving modes for respect speeds of the vehicle and an inclination of a driving road of the vehicle;
- determining, by the controller, a calibration value based on the driving load and a main battery SOC state;
- and
- adjusting, by the controller, an auxiliary battery SOC state according to two driving load modes based on the calibration value, the two driving load modes including a high load mode and a low load mode,
- wherein the calibration value is determined by a calibration value derivation table, and the calibration value derivation table is generated with the calibration value variably adjusted based on information on the driving load of the vehicle and the main battery SOC state.
A system for controlling a battery state of charge (SOC) of a hybrid vehicle, comprising:
- a memory configured to store program instructions;
- and
- a processor configured to execute the program instructions, the program instructions when executed configured to:
- determine a driving load of the vehicle based on driving modes for respect speeds of the vehicle and an inclination of a driving road of the vehicle;
- determine a calibration value based on the driving load and a main battery SOC state;
- and
- adjust an auxiliary battery SOC state according to two driving load modes based on the calibration value, the two driving load modes including a high load mode and a low load mode,
- wherein the calibration value is determined by a calibration value derivation table, and the calibration value derivation table is generated with the calibration value variably adjusted based on information on the driving load of the vehicle and the main battery SOC state.
Dependencies are inferred from the claim text.