Method and device for fault diagnosis and treatment of hydrogen fuel cell

A fuel cell and fault diagnosis technology, applied to fuel cells, circuits, electrical components, etc., can solve problems affecting fuel cell performance, stack performance degradation, and cathode gas entry, etc., to avoid excessive impurity gas content and fault diagnosis. Timely and accurate, simple installation effect

CN113571745BActive Publication Date: 2022-07-08广东省武理工氢能产业技术研究院
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-07-08

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Abstract

The invention discloses a method and a device for diagnosing and processing faults of hydrogen in a hydrogen fuel cell. A hydrogen concentration sensor and a temperature sensor are installed at the outlet of a drainage and exhaust device of a hydrogen supply system of the fuel cell. When the drain exhaust device starts pulse discharge, the sensor data in one pulse discharge cycle is recorded, and the hydrogen concentration algorithm is used to calculate the hydrogen concentration in the hydrogen supply system. The hydrogen concentration algorithm relies on the calibration experiment, and establishes the functional relationship between the sensor data and the hydrogen concentration in the hydrogen supply system through the existing experimental data. When it is detected that the hydrogen concentration in the hydrogen supply system is lower than the threshold value, the pulse discharge is actively turned on, and the hydrogen concentration in the hydrogen supply system is restored by continuously exhausting to complete the troubleshooting. The present invention directly measures the hydrogen concentration in the hydrogen supply system, so that faults can be found in time and handled quickly.
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Description

technical field

[0001] The invention belongs to the technical field of fuel cells, and in particular relates to a hydrogen fuel cell fault judgment and processing method and device based on hydrogen purity detection. Background technique

[0002] In recent years, under the background of countries around the world responding to energy conservation and emission reduction, hydrogen energy has received more and more attention as a clean energy. my country has included hydrogen energy in relevant development strategies and industrial policies, and fuel cells are the most important way of utilizing hydrogen energy. At present, fuel cells have been popularized and applied in the fields of automobiles, drones, and stationary power generation.

[0003] The main components of the fuel cell hydrogen supply system include: hydrogen storage tank, valve components, hydrogen return components, water separators, and drainage and exhaust components. The main function of the drainage and ex...

Examples

Embodiment 1

[0039] like figure 2 As shown in the figure, a fault diagnosis and processing method for a hydrogen fuel cell is characterized in that, when the drainage and exhaust device starts pulse discharge, a hydrogen concentration sensor is used to record a signal curve of a pulse discharge period, which is marked as C n , using the temperature sensor to record the signal curve of one pulse discharge cycle, marked as C T ; fuel cell controller according to C n and C T Calculate the hydrogen concentration value N inside the hydrogen supply system h .

[0040] The specific fault diagnosis and processing method is as follows: the hydrogen concentration threshold N is stored in the fuel cell controller. c , by comparing the hydrogen concentration value N h and the hydrogen concentration threshold N c to judge whether the hydrogen fuel cell fails; if N h c , indicating that the concentration of impurity gas in the hydrogen supply system is too high; at this time, the fuel cell contr...

Embodiment 2

[0045] A fault diagnosis and processing method for a hydrogen fuel cell, which is basically the same as that of Embodiment 1, except that the hydrogen concentration algorithm is different.

[0046] like image 3 As shown, in this embodiment, the hydrogen concentration algorithm uses the hydrogen concentration sensor signal C in the database Map n The hydrogen concentration peak height H is used as a key indicator, and the experimental data is used to fit N at a certain temperature to obtain N s and the functional relationship between H.

[0047] N s = f1(H).

[0048] Then according to N s The corresponding relationship with H obtains the hydrogen concentration value N at a certain temperature and a certain hydrogen concentration peak height H h .

[0049] As for the specific data fitting method, it is the common technical knowledge mastered by those skilled in the art, and will not be described in detail here.

Embodiment 3

[0051] A fault diagnosis and processing method for a hydrogen fuel cell, which is basically the same as that of Embodiment 1, except that the hydrogen concentration algorithm is different.

[0052] like Figure 4 As shown, in this embodiment, the hydrogen concentration algorithm uses the hydrogen concentration sensor signal C n The hydrogen concentration peak integral area Area is used as a key indicator, and the test data is used to obtain N at a certain temperature. s and the functional relationship between Area.

[0053] N s = f2(Area).

[0054] Then according to N s The corresponding relationship with Area obtains the hydrogen concentration value N under a certain temperature and a certain hydrogen concentration peak integral area Area h .

[0055] As for the specific data fitting method, it is the common technical knowledge mastered by those skilled in the art, and will not be described in detail here.