CN110676487B - Monitoring system for proton exchange membrane fuel cell - Google Patents

Abstract

The invention provides a monitoring system for a proton exchange membrane fuel cell, comprising: a micro sensor, a signal processing module, a gas detection module, a data analysis module and a central control unit; the micro sensor and the gas detection module are all connected with the proton exchange membrane The fuel cell is connected; the micro sensor is connected with the signal processing module; the gas detection module is connected with the data analysis module; both the signal processing module and the data analysis module are connected with the central control unit. The system of the invention judges the aging of the fuel cell by detecting the performance decay of the proton exchange membrane; in addition to environmental factors, the poisoning effect of impurity gas is also considered, thereby improving the use safety of the proton exchange membrane fuel cell.

Description

A monitoring system for proton exchange membrane fuel cells

technical field

The invention belongs to the technical field of fuel cells, and in particular relates to a monitoring system for a proton exchange membrane fuel cell.

Background technique

With the development of fuel cell technology, fuel cells have broad application prospects in the field of stationary power generation. Proton exchange membrane fuel cells (PEMFCs) use hydrogen and oxygen as anode fuels and cathode oxides, and use solid electrolyte membranes as cathode and anode separators and transport protons. The service life is the main obstacle that restricts the commercial application of PEMFC, so it is of great significance to develop an online monitoring system for the performance degradation of PEMFC.

After scientific research, the main reasons for the decline of PEMFC life are: gas permeation, the influence of ambient temperature and humidity, and the poisoning effect of impurity gas on the proton exchange membrane.

Patent CN201910314079 discloses a proton exchange membrane fuel cell stack reaction state on-line detection system and its application, which are used to detect the problem that the uneven distribution of reaction gas and cooling water in the main pipe during the stack reaction affects the service life of the entire battery. The above system It is only applicable to the detection of the reaction state of the fuel cell stack, but does not detect the performance of a single PEMFC, and does not consider the detection of impurity gases, and does not consider comprehensively in terms of detecting the performance of the PEMFC.

SUMMARY OF THE INVENTION

In view of the above shortcomings of the prior art, the present invention provides a monitoring system for a proton exchange membrane fuel cell to solve the above technical problems.

The invention provides a monitoring system for a proton exchange membrane fuel cell, comprising: a micro sensor, a signal processing module, a gas detection module, a data analysis module and a central control unit; the micro sensor and the gas detection module are all connected with the proton exchange membrane The fuel cell is connected; the micro sensor is connected with the signal processing module; the gas detection module is connected with the data analysis module; the signal processing module and the data analysis module are both connected with the central control unit; the signal processing module includes a differential An amplifier circuit and an A/D conversion circuit, the differential amplifier circuit is connected with the A/D conversion circuit.

Further, the gas detection module includes a sulfur dioxide sensor, a hydrocarbon sensor and a hydrogen chloride sensor, and the above-mentioned gas sensors can detect the gas composition and concentration in the proton exchange membrane fuel cell.

Further, the microsensor includes an air temperature sensor, an air humidity sensor and an air pressure sensor, and the microsensor can measure the temperature, humidity and air pressure of the air in the proton exchange membrane fuel cell.

Preferably, the system further includes a communication module and a display module, the display module is wirelessly connected to the central control unit through the communication module, and the communication module is connected to the central control unit.

The purpose of this preferred solution is to display the monitoring results to facilitate maintenance by relevant staff.

Preferably, the system further includes an alarm module, which is connected to the central control unit.

The purpose of this preferred solution is to prevent dangerous accidents caused by fuel cell aging. When monitoring fuel cell decay to a certain extent, an alarm is issued to remind relevant staff to check.

The beneficial effect of the present invention is that,

The invention provides a monitoring system for a proton exchange membrane fuel cell, the system can monitor the proton exchange membrane by detecting the temperature, humidity and air pressure of the air in the fuel cell, and the gas detection can detect the component concentration of impurity gas. The performance degradation of the fuel cell is to detect the aging of the proton exchange membrane fuel cell by considering the poisoning effect of the proton exchange membrane, so as to improve the use safety of the proton exchange membrane fuel cell.

In addition, the present invention has reliable design principle and simple structure, and has a very wide application prospect.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, other drawings can also be obtained based on these drawings without creative labor.

1 is a schematic structural diagram of a system according to an embodiment of the present application;

2 is a schematic structural diagram of a system according to an embodiment of the present application;

3 is a schematic structural diagram of a system according to an embodiment of the present application;

Among them, 1. Micro sensor; 2. Signal processing module; 3. Gas detection module; 4. Data analysis module; 5. Central control unit; 6. Differential amplifier circuit; 7. A/D conversion circuit; 8. Sulfur dioxide sensor; 9. Hydrocarbon sensor; 10. Hydrogen chloride sensor; 11. Air temperature sensor; 12. Air humidity sensor; 13. Air pressure sensor; 14. Communication module; 15. Display module; 16. Alarm module.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

Example 1

As shown in FIG. 1 , this embodiment provides a monitoring system for a proton exchange membrane fuel cell, including: a micro sensor 1, a signal processing module 2, a gas detection module 3, a data analysis module 4 and a central control unit 5; The microsensor 1 and the gas detection module 3 are both connected to the proton exchange membrane fuel cell; the microsensor 1 is connected to the signal processing module 2; the gas detection module 3 is connected to the data analysis module 4; the signal processing module 2. The data analysis module 4 is connected to the central control unit 5; the signal processing module 2 includes a differential amplifier circuit 6 and an A/D conversion circuit 7, and the differential amplifier circuit 6 is connected to the A/D conversion circuit 7; the The gas detection module 3 includes a sulfur dioxide sensor 8 , a hydrocarbon sensor 9 and a hydrogen chloride sensor 10 ; the micro sensor 1 includes an air temperature sensor 11 , an air humidity sensor 12 and an air pressure sensor 13 .

After the system is started, on the one hand, the sulfur dioxide sensor 8, the hydrocarbon sensor 9 and the hydrogen chloride sensor 10 continuously detect whether there are gases such as sulfur dioxide, hydrocarbons and hydrogen chloride in the fuel cell, and send the detected signals to the signal processing module 2, via After the differential amplifier circuit 6 and the A/D conversion circuit 7 perform signal amplification processing and digital-to-analog conversion, they are sent to the central control unit 5 for further analysis and processing. The performance of the proton exchange membrane is attenuated under the poisoning effect of the gas, so that the performance of the proton exchange membrane fuel cell is judged to be attenuated.

On the other hand, the air temperature sensor 11, the air humidity sensor 12 and the air pressure sensor 13 respectively receive temperature, humidity and air pressure data, and the above-mentioned data are sent to the central control unit 5 for further analysis and processing after the data analysis module 4 is analyzed and processed, The current air temperature, humidity and air pressure are compared with the most suitable air environment for the proton exchange membrane to determine whether the current fuel cell air has an impact on the proton exchange membrane, so as to obtain whether it has an impact on the performance degradation of the fuel cell and the magnitude of the impact.

Example 2

As shown in FIG. 2 , this embodiment adds a communication module 14 and a display module 15 on the basis of Embodiment 1. The display module 15 is wirelessly connected to the central control unit 5 through the communication module 14 , and the communication module 14 is connected to the central control unit 5 by wireless communication. The central control unit 5 is connected.

After the system is started, the central control unit 5 uploads the monitoring results to the display module 15 through the communication module 14, so as to realize the remote monitoring of the fuel cell monitoring system.

Example 3

As shown in FIG. 3 , this embodiment adds an alarm module 16 on the basis of Embodiment 2, and the alarm module 16 is connected to the central control unit 5 .

After the system is started, if it is detected that the fuel cell has performance degradation, the central control unit 5 controls the alarm module 16 to issue an alarm message to remind relevant staff to perform maintenance.

Although the present invention has been described in detail in conjunction with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (4)

1. A monitoring system for a pem fuel cell comprising: the system comprises a micro sensor, a signal processing module, a gas detection module, a data analysis module and a central control unit; the micro sensor and the gas detection module are both connected with the proton exchange membrane fuel cell; the micro sensor is connected with the signal processing module; the gas detection module is connected with the data analysis module; the signal processing module and the data analysis module are both connected with the central control unit; the micro sensor comprises an air temperature sensor, an air humidity sensor and an air pressure sensor;

After the system is started, on one hand, the gas detection module continuously detects whether impurity gases such as sulfur dioxide, hydrocarbon and hydrogen chloride exist in the fuel cell, and sends a detected signal to the signal processing module, the signal processing module performs signal amplification processing and digital-to-analog conversion and then sends the signal to the central control unit for further analysis and processing, and if the impurity gases exist, the performance of the proton exchange membrane fuel cell is judged to be attenuated; on the other hand, the air temperature sensor, the air humidity sensor and the air pressure sensor respectively receive temperature, humidity and air pressure data, the data are analyzed and processed by the data analysis module and then are sent to the central control unit for further analysis and processing, and the current air temperature, humidity and air pressure are compared with the optimum air environment of the proton exchange membrane to judge whether the current fuel cell air influences the proton exchange membrane, so that whether the performance attenuation of the fuel cell is influenced is obtained;

the gas detection module includes a sulfur dioxide sensor, a hydrocarbon sensor, and a hydrogen chloride sensor.

2. The monitoring system for the PEM fuel cell according to claim 1, wherein said signal processing module comprises a differential amplifying circuit and an A/D converting circuit, said differential amplifying circuit being connected to said A/D converting circuit.

3. The monitoring system for pem fuel cell of claim 1 further comprising a communication module and a display module, wherein said display module is connected to said central control unit via said communication module, and said communication module is connected to said central control unit.

4. The monitoring system for pem fuel cell of claim 1 further comprising an alarm module, said alarm module being connected to said central control unit.

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