Fuel cell after-sales maintenance teaching device and system and use method thereof

Abstract

The invention relates to the technical field of new energy teaching experiment equipment, in particular to a fuel cell after-sales maintenance teaching device and system and a use method thereof, which integrate demonstration teaching, fault diagnosis and actual maintenance into a whole and realize high integration of theory and practice. Students can carry out real fuel cell stack test and maintenance operation by hands while learning the principle of a fuel cell, the authenticity and interestingness of experiment teaching are greatly enhanced, and meanwhile, key parameters such as an impedance spectrum, a hydrogen permeation rate, a current and voltage curve and the like can be acquired and visually displayed in real time, so that the experiment teaching efficiency is improved. Therefore, the impedance spectroscopy diagnosis technology disclosed by the invention has the advantages of low cost, quick response and high accuracy, and is convenient to popularize and use in a teaching environment. And after faults are found, students are automatically prompted and guided to troubleshoot step by step, so that the learning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy teaching experimental equipment, and in particular to a fuel cell after-sales maintenance teaching device, system and use method thereof. Background Art

[0002] Fuel cells, devices that convert chemical energy directly into electrical energy, offer advantages such as high energy density and clean, environmentally friendly operation. They have garnered widespread attention and application in the new energy sector. With the development of fuel cell technology, their application scenarios are expanding, encompassing multiple fields including power generation and electricity generation.

[0003] In the application process of fuel cells, after-sales maintenance plays a vital role and is directly related to the performance, life and safety of fuel cells. Fuel cell after-sales maintenance requires professional technology and knowledge, so relevant teaching platforms are of great significance for cultivating professional talents.

[0004] Early fuel cell education relied primarily on traditional theoretical instruction and simple experimental equipment, making it difficult to provide a comprehensive and systematic after-sales maintenance teaching experience. In recent years, with the advancement of fuel cell technology and the emphasis on talent development, domestic and foreign universities and vocational training institutions have begun offering fuel cell-related courses and introducing practical training platforms. The field of fuel cell after-sales maintenance education has also gradually developed, with the emergence of specialized teaching platforms and equipment.

[0005] However, most existing fuel cell training platforms focus on the structural description of fuel cells, basic charge and discharge curve acquisition, and output characteristic demonstration, and lack diagnostic processes and maintenance operation modules for the health status of fuel cells. For example, the Chinese patent with publication number CN115206170A, entitled "A hydrogen fuel cell structural principle teaching platform containing a host computer control module", although it enables students to intuitively understand the working principle through system integration, the teaching content is too theoretical and there is a certain gap with the actual fuel cell system and after-sales maintenance work scenarios. Another example is the Chinese patent with publication number CN116153153A, entitled "A modular hydrogen fuel cell training teaching platform", which has a human-computer interaction module that can dynamically observe and adjust the operating parameters of each module in the form of images, has strong interactivity and high visualization, but it, together with the above patents, cannot restore the real maintenance environment and is difficult to meet the multi-level and multi-scenario teaching needs. There is also a Chinese patent with publication number CN117542237A, entitled "A Fuel Cell System Fault Diagnosis Training Platform Based on Human-Computer Interaction", which has both fuel cell system fault diagnosis and fault diagnosis training teaching working modes. Although this patent has added a fault diagnosis function compared to simple structural teaching, it can only realize some simple and common fault simulations in terms of fault simulation, and the fault settings are not flexible and diverse enough to cover the various complex fault conditions that may occur in the actual operation of fuel cells. This makes it difficult for students to be exposed to a full range of fault types and diagnostic methods during the learning process, which is not conducive to cultivating their actual problem-solving ability. In addition, most current teaching systems only support single-type testing and cannot quickly switch between fuel cell stacks of different specifications. Loading and unloading the stack, reconfiguring the gas path and circuit connections takes a lot of time, affecting teaching efficiency.

[0006] Based on the above reasons, the present invention designs a fuel cell after-sales maintenance teaching device, system and its use method, which innovatively integrates multiple functional modules such as impedance testing, hydrogen permeation measurement, data diagnosis, activation maintenance and teaching demonstration into the same hardware platform. It has high functional integration, good expansion and flexibility, and richer teaching modes and teaching methods. Summary of the Invention

[0007] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a fuel cell after-sales maintenance teaching device, system and its use method, which innovatively integrates multiple functional modules such as impedance testing, hydrogen permeation measurement, data diagnosis, activation maintenance and teaching demonstration into the same hardware platform, with high functional integration, good expansion and flexibility, and richer teaching modes and teaching methods.

[0008] In order to achieve the above-mentioned objectives, the present invention provides a fuel cell after-sales maintenance teaching device, which includes a cabinet and a display platform arranged above the cabinet. A fuel cell stack loading module is installed on one side of the cabinet, a constant current charger module is installed on the other side of the cabinet, a spectrum analyzer module is arranged above the constant current charger module, an expansion interface is provided at the bottom of one side of the display platform, a teaching panel module is provided above the expansion interface, and a data acquisition and diagnosis module is provided on the other side of the display platform.

[0009] Rolling wheels are arranged around the bottom of the cabinet, and the display table is a flat structure.

[0010] A fuel cell after-sales maintenance teaching system comprises a hydrogen supply system and an oxygen supply system connected to each other through a control circuit, each connected to a humidification and temperature control system through a gas circuit, the humidification and temperature control system being connected to a fuel cell stack through a gas circuit, the fuel cell stack being connected to a load regulator through a circuit, the fuel cell stack being electrically connected to a spectrum analyzer module and a constant current charger module, the fuel cell stack being connected to a back pressure regulation and safety system through a gas circuit, the spectrum analyzer module and the constant current charger module being connected to a data acquisition and diagnosis module through a measurement circuit, the data acquisition and diagnosis module being connected to a teaching panel module through a measurement circuit, the teaching panel module being connected to the constant current charger module and the back pressure regulation and safety system through a control circuit, the back pressure regulation and safety system being connected to the load regulator through a control circuit, and the load regulator being connected to the humidification and temperature control system and the hydrogen supply system through a control circuit.

[0011] A method for using a fuel cell after-sales maintenance teaching system comprises the following steps: S1, insert the fuel cell stack horizontally into the fuel cell stack loading module and connect the corresponding gas, water and electrical circuits in the fuel cell after-sales maintenance teaching system; S2, open the hydrogen supply valve on the hydrogen supply system and the air circulation system in the oxygen supply system, start the cooling system through the humidification and temperature control system, and ensure that the fuel cell stack is in an initial normal state.

[0012] S3, select "New Experiment" on the teaching panel touch screen of the teaching panel module and enter the stack type parameters. The system automatically initializes the sensor and performs baseline calibration; S4, the spectrum analyzer module performs an impedance scan on the fuel cell stack with an AC current of a certain amplitude, and the constant current charger module simultaneously performs a controllable constant current charge and discharge cycle on the fuel cell stack; The two sets of tests in S5 and S4 are performed simultaneously: the impedance test of the spectrum analyzer module obtains complex impedance spectrum data, and the constant current test of the constant current charger module obtains the hydrogen permeation current inside the fuel cell stack through the short-circuit hydrogen measurement method; S6, uploads the data from S5 test to the data acquisition and diagnosis module in real time, and processes it using the built-in algorithm of the data acquisition and diagnosis module combined with the equivalent circuit model; S7, the data acquisition and diagnosis module feeds back the processing results in real time on the teaching panel interface of the teaching panel module, which is used to display the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve and the hydrogen permeation rate curve; S8. If the interface in S7 prompts "abnormality detected", select an activation treatment plan (different load cycle methods) on the teaching panel interface of the teaching panel module; S9, the teaching panel module's teaching panel interface displays the step-by-step instructions for the activation treatment process in S8, and prompts the operation sequence through lights and animations; S10, during the activation process, the data acquisition and diagnosis module continuously monitors performance changes. After the activation is completed, it outputs the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve, and the hydrogen permeation rate curve, as shown in S7, for verification of the effect; In S11, S1~S10, the fuel cell after-sales maintenance teaching system has built-in interactive prompts and warning sounds to ensure that operators follow the steps and can automatically suspend operations in the event of abnormalities or safety hazards.

[0013] The controllable constant current charge and discharge cycle in S4 is divided into 3A to 5A gears.

[0014] The teaching panel interface of the teaching panel module in S7 displays the processing results of S7 in the form of graphics and text.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention integrates demonstration teaching, fault diagnosis, and actual maintenance, achieving a high degree of integration of theory and practice. While students learn the principles of fuel cells, they can also conduct hands-on fuel cell stack testing and maintenance operations, greatly enhancing the authenticity and interest of experimental teaching.

[0016] The system also collects and visualizes key parameters such as impedance spectra, hydrogen permeation rates, and current-voltage curves in real time, enabling students to intuitively understand stack performance through these curves and state diagrams. This low-cost, fast-response, and high-accuracy impedance spectroscopy diagnostic technology facilitates its widespread use in teaching environments. When a fault is discovered, it automatically prompts and guides students through step-by-step troubleshooting, improving learning efficiency.

[0017] In addition, the combination of rich multimedia teaching content and a graphical operating interface provides a good interactive experience. The present invention also has good scalability and upgrade potential. It not only meets the current experimental teaching needs of new energy majors, but can also adapt to the new development trend of fuel cell technology. Its innovative structure and highly integrated functions provide colleges and universities with advanced practical teaching conditions, significantly improving the teaching quality and students' engineering literacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the teaching device of the present invention.

[0019] Figure 2 It is a side schematic diagram of the teaching device of the present invention.

[0020] Figure 3 The figure is a flow chart of the method for using the present invention.

[0021] Figure 4 Schematic diagram of the teaching system principle of the present invention.

[0022] Explanation of the accompanying reference numerals: 1 teaching panel module, 2 data acquisition and diagnosis module, 3 spectrum analyzer module, 4 constant current charger module, 5 fuel cell stack loading module, 6 expansion interface, 7 cabinet, 8 display station. DETAILED DESCRIPTION

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] See also Figures 1 to 4 The present invention provides a fuel cell after-sales maintenance teaching device, which includes a cabinet 7 and a display platform 8 arranged above the cabinet 7. A fuel cell stack loading module 5 is installed on one side of the cabinet 7, and a constant current charger module 4 is installed on the other side of the cabinet 7. A spectrum analyzer module 3 is arranged above the constant current charger module 4. An expansion interface 6 is provided at the bottom of one side of the display platform 8, and a teaching panel module 1 is provided above the expansion interface 6. A data acquisition and diagnosis module 2 is provided on the other side of the display platform 8.

[0025] Rolling wheels are provided around the bottom of the cabinet 7, and the display stand 8 is a flat structure.

[0026] A fuel cell after-sales maintenance teaching system, wherein a hydrogen supply system and an oxygen supply system connected to each other through a control circuit are respectively connected to a humidification and temperature control system through a gas circuit, the humidification and temperature control system is connected to a fuel cell stack through a gas circuit, the fuel cell stack is connected to a load regulator through a circuit, the fuel cell stack is respectively electrically connected to a spectrum analyzer module 3 and a constant current charger module 4, the fuel cell stack is connected to a back pressure regulation and safety system through a gas circuit, the spectrum analyzer module 3 and the constant current charger module 4 are respectively connected to a data acquisition and diagnosis module 2 through a measurement circuit, the data acquisition and diagnosis module 2 is connected to a teaching panel module 1 through a measurement circuit, the teaching panel module 1 is respectively connected to the constant current charger module 4 and the back pressure regulation and safety system through a control circuit, the back pressure regulation and safety system is connected to the load regulator through a control circuit, and the load regulator is respectively connected to the humidification and temperature control system and the hydrogen supply system through a control circuit.

[0027] A method for using a fuel cell after-sales maintenance teaching system comprises the following steps: S1, insert the fuel cell stack horizontally into the fuel cell stack loading module 5, and connect the corresponding gas, water and electrical circuits as in the fuel cell after-sales maintenance teaching system; S2, open the hydrogen supply valve on the hydrogen supply system and the air circulation system in the oxygen supply system, start the cooling system through the humidification and temperature control system, and ensure that the fuel cell stack is in an initial normal state.

[0028] S3, select "New Experiment" on the teaching panel touch screen of teaching panel module 1 and enter the battery type parameters. The system automatically initializes the sensor and performs baseline calibration; S4, the spectrum analyzer module 3 performs an impedance scan on the fuel cell stack with an AC current of a certain amplitude, and the constant current charger module 4 simultaneously performs a controllable constant current charge and discharge cycle on the fuel cell stack; The two sets of tests in S5 and S4 are performed simultaneously: the impedance test of the spectrum analyzer module 3 obtains complex impedance spectrum data, and the constant current test of the constant current charger module 4 obtains the hydrogen permeation current inside the fuel cell stack through the short-circuit hydrogen measurement method; S6, uploading the data tested in S5 to the data acquisition and diagnosis module 2 in real time, and processing the data by the built-in algorithm of the data acquisition and diagnosis module 2 combined with the equivalent circuit model; S7, the data acquisition and diagnosis module 2 feeds back the processing results in real time on the teaching panel interface of the teaching panel module 1, which is used to display the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve and the hydrogen permeation rate curve; S8, if the interface in S7 prompts "abnormality detected", select an activation treatment scheme (different load cycle methods) on the teaching panel interface of the teaching panel module (1); S9, the teaching panel interface of the teaching panel module 1 displays the step-by-step instructions for the activation treatment process in S8, and prompts the operation sequence through lights and animations; S10, during the activation process, the data acquisition and diagnosis module 2 continuously monitors performance changes, and after the activation is completed, outputs the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve, and the hydrogen permeation rate curve as in S7 again for verification of the effect; In S11, S1~S10, the fuel cell after-sales maintenance teaching system has built-in interactive prompts and warning sounds to ensure that operators follow the steps and can automatically suspend operations in the event of abnormalities or safety hazards.

[0029] The controllable constant current charge and discharge cycle in S4 is divided into 3A to 5A gears.

[0030] The teaching panel interface of the teaching panel module 1 in S7 displays the processing results of S7 in the form of graphics and text.

[0031] The above are merely preferred embodiments of the present invention and are intended to help understand the method and core concept of this application. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the concept of the present invention fall within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

[0032] This invention comprehensively addresses shortcomings in existing fuel cell stack teaching systems, such as the lack of comprehensive information on battery health diagnosis and maintenance operations, as well as overly theoretical teaching content, inflexible fault settings, insufficient fault types, and unintuitive presentations. This invention integrates multiple functional modules, including impedance testing, hydrogen permeation measurement, data diagnosis, activation maintenance, and teaching demonstrations, into a single hardware platform. These tightly coupled modules avoid the fragmented nature of traditional teaching equipment and the resulting low experimental efficiency, enabling students to complete the entire learning process, from performance testing to fault diagnosis to maintenance and repair, using a single set of equipment.

[0033] In addition, the present invention supports automatic switching testing of single / multi-stacks and can compare the working status of different fuel cells in parallel; the teaching panel and the demonstration fuel cell are interconnected and interactive, and the panel can display the internal schematic diagram, waveform and text guidance of the fuel cell in real time, and realize human-computer interaction by combining buttons, indicator lights, animation guidance and other forms.

[0034] Furthermore, the platform's diagnostic module integrates advanced algorithms and a knowledge base, enabling rapid identification of various faults. For example, the introduction of a diagnostic engine based on expert systems or machine learning enables in-depth analysis of impedance spectroscopy and hydrogen permeation data, enabling intelligent determination of fault type and severity. The platform also connects to the cloud to update its fault case library, algorithm models, and educational content, enhancing the accuracy of diagnostic results and guidance, and providing recommendations for optimal maintenance strategies. The activation process module not only includes preset steps but also allows for customized solutions based on historical data, improving fault recovery efficiency.

[0035] Finally, this device also supports open expansion, with reserved communication buses and installation interfaces. In the future, more functional units (such as thermal imaging cameras, environmental simulation chambers, VR / AR expansion modules, etc.) can be connected, further enriching teaching methods.

Claims

1. A fuel cell after-sales maintenance teaching device, characterized in that: The device comprises a cabinet (7) and a display stand (8) arranged above the cabinet (7); a fuel cell stack loading module (5) is installed on one side of the cabinet (7); a constant current charger module (4) is installed on the other side of the cabinet (7); a spectrum analyzer module (3) is arranged above the constant current charger module (4); an expansion interface (6) is arranged at the bottom of one side of the display stand (8); a teaching panel module (1) is arranged above the expansion interface (6); and a data acquisition and diagnosis module (2) is arranged on the other side of the display stand (8).

2. The fuel cell after-sales maintenance teaching device according to claim 1, characterized in that: Rolling wheels are arranged around the bottom of the cabinet (7), and the display stand (8) is a flat structure.

3. A fuel cell after-sales maintenance teaching system, characterized in that: The hydrogen supply system and the oxygen supply system connected to each other through the control circuit are respectively connected to the humidification and temperature control system through the gas circuit, the humidification and temperature control system is connected to the fuel cell stack through the gas circuit, the fuel cell stack is connected to the load regulator through the circuit, the fuel cell stack is respectively electrically connected to the spectrum analyzer module (3) and the constant current charger module (4), the fuel cell stack is connected to the back pressure regulation and safety system through the gas circuit, the spectrum analyzer module (3) and the constant current charger module (4) are respectively connected to the data acquisition and diagnosis module (2) through the measurement circuit, the data acquisition and diagnosis module (2) is connected to the teaching panel module (1) through the measurement circuit, the teaching panel module (1) is respectively connected to the constant current charger module (4) and the back pressure regulation and safety system through the control circuit, the back pressure regulation and safety system is connected to the load regulator through the control circuit, and the load regulator is respectively connected to the humidification and temperature control system and the hydrogen supply system through the control circuit.

4. A method for using a fuel cell after-sales maintenance teaching system, characterized in that: The following steps are involved: S1, inserting the fuel cell stack horizontally into the fuel cell stack loading module (5), and connecting the corresponding gas circuits, water circuits and electrical circuits in the system as claimed in claim 3; S2, opening the hydrogen supply valve on the hydrogen supply system and the air circulation system in the oxygen supply system, starting the cooling system through the humidification and temperature control system, and ensuring that the fuel cell stack is in an initial normal state. S3, select "new experiment" on the teaching panel touch screen of the teaching panel module (1) and enter the battery type parameters, and the system automatically initializes the sensor and performs baseline calibration; S4, the spectrum analyzer module (3) performs impedance scanning on the fuel cell stack with an alternating current of a certain amplitude, and the constant current charger module (4) simultaneously performs a controllable constant current charge and discharge cycle on the fuel cell stack; S5, the two groups of tests in S4 are performed simultaneously: the impedance test of the spectrum analyzer module (3) obtains complex impedance spectrum data, and the constant current test of the constant current charger module (4) obtains the hydrogen permeation current inside the fuel cell stack by a short-circuit hydrogen measurement method; S6, uploading the data of the S5 test to the data acquisition and diagnosis module (2) in real time, and processing the data by the built-in algorithm of the data acquisition and diagnosis module (2) combined with the equivalent circuit model; S7, the data acquisition and diagnosis module (2) feeds back the processing results in real time on the teaching panel interface of the teaching panel module (1), which is used to display the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve and the hydrogen permeation rate curve; S8, if the interface in S7 prompts "abnormality detected", select an activation treatment scheme (different load cycle methods) on the teaching panel interface of the teaching panel module (1); S9, the teaching panel interface of the teaching panel module (1) displays the step instructions of the activation treatment process described in S8, and prompts the operation sequence through lights and animations; S10, during the activation process, the data acquisition and diagnosis module (2) continuously monitors performance changes, and after the activation is completed, outputs the total health score of the fuel cell stack, the health distribution of each single cell, the impedance spectrum curve and the hydrogen permeation rate curve as described in S7 again for verifying the effect; S11, in S1 to S10, the fuel cell after-sales maintenance teaching system has built-in interactive prompts and warning sounds to ensure that the operator follows the steps and can automatically suspend the operation in the event of an abnormality or safety hazard.

5. The method for using the fuel cell after-sales maintenance teaching system according to claim 4, characterized in that: The controllable constant current charge and discharge cycle in S4 is divided into gears of 3A to 5A.

6. The method for using the fuel cell after-sales maintenance teaching system according to claim 4, characterized in that: The teaching panel interface of the teaching panel module (1) in the S7 displays the processing results of the S7 in the form of graphics and text.

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