Method and system for controlling hydrogen supply for fuel cell

Patent metadata

Field	Value
Publication number	US-2019074529-A1
Application number	US-201715839227-A
Country	US
Kind code	A1
Filing date	Dec 12, 2017
Priority date	Sep 1, 2017
Publication date	Mar 7, 2019
Grant date	—

Abstract

A method and a system for controlling hydrogen supply for a fuel cell are provided. The method includes calculating a target hydrogen supply pressure, which is a target pressure value of hydrogen supplied to a fuel cell stack based on a required output. A fuel supply valve (FSV) duty is then adjusted based on the calculated target hydrogen supply pressure and modes are determined based on the FSV duty or actual hydrogen supply pressure measurements of a sensor. A hydrogen supply pressure measurement is calculated according to each of the determined modes and the FSV duty is corrected based on the calculated target hydrogen supply pressure and the hydrogen supply pressure measurement.

First claim

1 . A method for controlling hydrogen supply for a fuel cell, comprising:
calculating, by a controller, a target hydrogen supply pressure, which is a target pressure value of hydrogen supplied to a fuel cell stack based on a required output; adjusting, by the controller, a fuel supply valve (FSV) duty based on the calculated target hydrogen supply pressure; determining, by the controller, a plurality of modes based on the FSV duty or an actual hydrogen supply pressure measurement of a sensor and calculating a hydrogen supply pressure measurement according to each of determined modes; and correcting, by the controller, the FSV duty based on the target hydrogen supply pressure and the hydrogen supply pressure measurement.

2 . The method of claim 1 , wherein the calculating of the target hydrogen supply pressure includes calculating a necessary hydrogen amount based on an output required for the fuel cell and a target hydrogen supply pressure based on the necessary hydrogen amount.

3 . The method of claim 1 , wherein the FSV duty is calculated according to the target hydrogen supply pressure based on a preset map and a FSV is adjusted based on the calculated duty.

4 . The method of claim 1 , wherein when the FSV duty is within a preset range, an average value of actual hydrogen supply pressure measurements of a plurality of sensors, is calculated as the hydrogen supply pressure measurement.

5 . The method of claim 1 , wherein when the FSV duty is equal to or greater than a preset value, the hydrogen supply pressure measurement is calculated by averaging an average value of actual hydrogen supply pressure measurements of the plurality of sensors, and a hydrogen supply pressure according to the FSV duty.

6 . The method of claim 5 , wherein the hydrogen supply pressure according to the FSV duty is calculated based on a preset map.

7 . The method of claim 1 , wherein when an error of the actual hydrogen supply pressure measurements of the plurality of sensors is greater than a preset range, actual hydrogen supply pressure measurements of the plurality of sensors are selected and used for calculating a hydrogen supply pressure measurement.

8 . The method of claim 7 , wherein an actual hydrogen supply pressure measurement which is a closest measurement value to the hydrogen supply pressure according to the FSV duty among the actual hydrogen supply pressure measurements of the plurality of sensors is be selected and used for calculating the actual hydrogen supply pressure measurements of the plurality of sensors.

9 . The method of claim 1 , wherein when the FSV duty is equal to or greater than a preset value and when an error between the actual hydrogen supply pressure measurements of the plurality of sensors is greater than a preset range, the hydrogen supply pressure measurement is calculated by averaging an average value of the actual hydrogen supply pressure measurements of the plurality of sensors, a hydrogen supply pressure according to the FSV duty, and a target hydrogen supply pressure.

10 . The method of claim 1 , wherein the plurality of modes are determined according to a hydrogen pressure variation rate which is calculated based on a variation amount of the target hydrogen supply pressure and a variation amount of the actual hydrogen supply pressure measurement of the sensor.

11 . The method of claim 10 , wherein the hydrogen pressure variation rate (FpPrsRat) is calculated by the following equation.

F
p



P
rs



R
at

=

|

Δ




P
sns

Δ




P
target

-
1

|

wherein, ΔP target is a variation amount of a target hydrogen supply pressure and ΔP sns is a variation amount of an actual hydrogen supply pressure measurement of a sensor.

12 . The method of claim 10 , wherein when the hydrogen pressure variation rate is equal to or greater than a first variation rate, the hydrogen supply pressure measurement is calculated by averaging an average value of actual hydrogen supply pressure measurements of the plurality of sensors and a hydrogen supply pressure according to the FSV duty.

13 . The method of claim 10 , wherein when the hydrogen pressure variation rate is equal to or greater than a second variation rate, the hydrogen supply pressure measurement is calculated by averaging an average value of actual hydrogen supply pressure measurements of the plurality of sensors, a hydrogen supply pressure according to the FSV duty, and a target hydrogen supply pressure.

14 . A system for controlling hydrogen supply for a fuel cell, comprising:
a fuel supply valve (FSV) disposed on a hydrogen supply line through which hydrogen is supplied to a fuel cell stack and configured to adjust a supply pressure of hydrogen supplied to the fuel cell stack; a plurality of sensors disposed on the hydrogen supply line and configured to measure a hydrogen supply pressure; and a controller configured to calculate a target hydrogen supply pressure, which is a target pressure value of hydrogen supplied to the fuel cell stack based on a required output, adjust a fuel supply valve (FSV) duty based on the calculated target hydrogen supply pressure, determine modes based on the FSV duty or the actual hydrogen supply pressure measurements of the sensors, calculate a hydrogen supply pressure measurement according to each of the determined modes, and correct the FSV duty based on the target hydrogen supply pressure and the hydrogen supply pressure measurement.

15 . The system of claim 14 , wherein, the system includes:
a memory configured to pre-store a map of the FSV duty according to a hydrogen supply pressure of the hydrogen supply line, wherein the controller is configured to adjust the FSV duty based on a target hydrogen supply pressure which is calculated using the map pre-stored in the memory.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Min Boung Ho
• Suh Kyung Won
• Lee Kyu Ii

Classifications

• H01M8/04753 Primary

  of fuel cell reactants · CPC title

• H01M8/24

  Grouping of fuel cells, e.g. stacking of fuel cells · CPC title

• H01M8/04089

  of gaseous reactants · CPC title

• H01M8/04388

  of anode reactants at the inlet or inside the fuel cell · CPC title

• H01M8/04992

  characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence · CPC title