Method and system for correcting offset of hydrogen pressure sensor
AssigneesHyundai Motor Company, Kia Corporation
InventorsSeong Cheol Jeong, Jong Gyun Kim, Jun Young Park
Life of this patent
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Abstract
Provided are a method and system for correcting an offset of a hydrogen pressure sensor. The method includes constantly supplying the hydrogen to the fuel cell stack, determining whether an offset of the hydrogen pressure sensor needs to be corrected based on a stop time before the fuel cell stack starts and a magnitude of an output voltage of the fuel cell stack, calculating an offset correction value when the offset of the hydrogen pressure sensor needs to be corrected, and correcting the offset of the hydrogen pressure sensor and performing the starting of the fuel cell stack.
Claims13
A method for correcting an offset of a hydrogen pressure sensor, comprising:
- checking, via a control unit, whether hydrogen is normally supplied to a fuel cell stack;
- constantly supplying the hydrogen to the fuel cell stack;
- determining whether an offset of the hydrogen pressure sensor needs to be corrected based on a stop time before the fuel cell stack starts and a magnitude of an output voltage of the fuel cell stack;
- calculating an offset correction value when the offset of the hydrogen pressure sensor needs to be corrected;
- and
- correcting the offset of the hydrogen pressure sensor and starting the fuel cell stack.
A system for correcting an offset of a hydrogen pressure sensor, comprising:
- a hydrogen supply line that connects a hydrogen tank and a fuel cell stack;
- a hydrogen cut-off valve and a hydrogen supply valve positioned on the hydrogen supply line;
- a hydrogen pressure sensor positioned at an inlet end of the hydrogen supply line of the fuel cell stack;
- and
- a control unit that controls the hydrogen supply valve while the hydrogen cut-off valve is normally opened to constantly supply the hydrogen to the fuel cell stack, determines whether an offset of the hydrogen pressure sensor needs to be corrected based on a stop time before the fuel cell stack starts or a magnitude of an output voltage of the fuel cell stack, corrects the offset of the hydrogen pressure sensor when the offset of the hydrogen pressure sensor needs to be corrected, and performs the starting of the fuel cell stack.
Dependencies are inferred from the claim text.