Fuel cell air compressor test bench

Abstract

The utility model discloses a fuel cell air compressor test board which comprises a high-voltage circuit, a low-voltage circuit and a sampling circuit, and a frequency converter and an air compressor are sequentially connected into the high-voltage circuit; a step-down converter is connected into the low-voltage circuit, and the low-voltage circuit is used for converting an input high voltage into a low voltage and outputting the low voltage to the sampling circuit; an air compressor temperature sensor used for detecting the internal temperature of the air compressor, a flowmeter used for detecting the flow of the air compressor, a pressure sensor used for detecting the pressure of a front pipeline and a rear pipeline of the air compressor and a temperature sensor used for detecting the temperature of the front pipeline and the rear pipeline of the air compressor are connected into the sampling circuit. According to the air compressor testing device, convenience and simplification of parts in the testing process of the air compressor are achieved, and the problems that in the current testing process, an air compressor driver, a high-power direct-current power source, an upper computer for controlling the air compressor driver and a communication CAN card are needed, and upper computer software is written and debugged before testing are solved.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell component testing, specifically to a fuel cell air compressor test bench. Background Technology

[0002] Hydrogen fuel cells, with their significant advantages of high fuel energy conversion efficiency, low noise, and zero emissions, have shown broad application prospects in transportation (such as automobiles, airplanes, and trains) and stationary power plants. As one of the core components of a fuel cell system, the air compressor is responsible for delivering clean air at specific pressures and flow rates to the fuel cell stack, and its performance directly affects the power density and power generation efficiency of the fuel cell. Therefore, developing a dedicated air compressor testing platform is crucial to ensuring the efficient and stable operation of the fuel cell system.

[0003] Traditional fuel cell air compressor test benches face numerous technical bottlenecks. On one hand, the test system requires additional high-power DC power supplies and dedicated air compressor drivers, resulting in high hardware integration complexity, bulky equipment, and high energy consumption. On the other hand, manual development and debugging of the host computer software are necessary before testing, which not only prolongs the testing cycle but also increases the workload of developers and reduces testing efficiency. For example, the literature "Research and Design of Fuel Cell Air Compressor Test Platform" points out that existing test platforms lack modular design, making it difficult to achieve parallel testing of multiple devices, further limiting test throughput.

[0004] In recent years, some companies have proposed improvement solutions through technological innovation to address the aforementioned issues. Wuhan Haiyi New Energy Technology Co., Ltd.'s "A Comprehensive Testing Device for Fuel Cell Air Compressors" (Publication No. CN222315342U) adopts an upper and lower frame splicing structure, integrating air filter devices, inspection windows, and air outlet devices, effectively reducing the space occupied by the equipment and improving testing flexibility. Jiangsu Yihejie Automotive Technology Co., Ltd.'s "A Testing System for Fuel Cell Air Compressors" (Publication No. CN221973766U) achieves accurate acquisition of performance data for both types of equipment by setting up independent compressor testing modules and expander testing modules, providing a reliable basis for subsequent design optimization.

[0005] Furthermore, the literature "Research on Testing Technology and Standardization of Fuel Cell Air Compressors" emphasizes that introducing automatic control algorithms and artificial intelligence technologies can promote the development of the testing process towards automation and intelligence. For example, a measurement and control system designed based on LabVIEW can realize automated testing of air compressor performance and achieve efficient data transmission through the CAN bus, significantly shortening the research and development cycle.

[0006] However, existing technologies have not yet completely solved the problems of cumbersome test system configuration and strong dependence on host computer software, which increases test time and workload. Therefore, developing an integrated, programming-free air compressor test platform has become a key requirement for improving the efficiency of fuel cell R&D. Utility Model Content

[0007] This invention provides a fuel cell air compressor test bench with a simple structure that can address the external environment requirements during fuel cell air compressor testing.

[0008] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0009] This invention provides a fuel cell air compressor test bench, including a high-voltage circuit, a low-voltage circuit, and a sampling circuit.

[0010] A frequency converter and an air compressor are connected sequentially in the high-voltage circuit.

[0011] The low-voltage circuit is equipped with a step-down converter, which is used to convert the input high voltage into a low voltage and then output it to the sampling circuit.

[0012] The sampling circuit includes an air compressor temperature sensor for detecting the internal temperature of the air compressor, a flow meter for detecting the flow rate of the air compressor, a pressure sensor for detecting the pressure of the front and rear pipelines of the air compressor, and a temperature sensor for detecting the temperature of the front and rear pipelines of the air compressor.

[0013] Furthermore, the high-voltage circuit is a circuit with a voltage exceeding 36V that can drive the air compressor and provide power to the entire test bench.

[0014] Furthermore, the high-voltage circuit is connected to a 380V industrial power grid, and the high-voltage circuit includes three live wires and one neutral wire; the low-voltage circuit is connected to one live wire and one neutral wire of the high-voltage circuit, thereby inputting 220V voltage.

[0015] Furthermore, the buck converter is used to convert 220V voltage to 24V.

[0016] Furthermore, the high-voltage circuit is equipped with an air switch at the end of each live wire and neutral wire connected to the 380V industrial power grid. This provides overload protection, short-circuit protection, and leakage protection for the line. Through the millisecond-level response of the air switch, potential risks are transformed into controllable maintenance events, significantly improving the overall reliability of power supply.

[0017] As a preferred embodiment, the fuel cell air compressor test bench of this utility model also includes a control mechanism, which receives signals from the air compressor temperature sensor, flow meter, pressure sensor, and temperature sensor and controls the output frequency of the frequency converter.

[0018] The flow meter collects the air flow rate through the pipeline during the operation of the air compressor; the pressure sensor collects the pressure of the front and rear pipelines during the operation of the air compressor, that is, a pressure sensor is installed in the front and rear pipelines of the air compressor; the temperature sensor collects the temperature of the front and rear pipelines during the operation of the air compressor; and the air compressor temperature sensor collects the internal temperature of the air compressor during the operation of the air compressor.

[0019] As a preferred embodiment, the sampling circuit incorporates a multi-channel digital display, which displays the detection values ​​from the air compressor's temperature sensor, flow meter, pressure sensor, and temperature sensor. In other words, the multi-channel digital display converts the signals collected by the sensors into visible signals such as temperature, pressure, and flow rate.

[0020] Compared with the prior art, the fuel cell air compressor test bench of this utility model realizes the convenience of air compressor testing process and simplifies the components. It solves the problems that currently exist in the testing process, such as the need for air compressor driver, high-power DC power supply, host computer to control air compressor driver and communication CAN card, and the need to write host computer software and debug host computer before testing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a fuel cell air compressor test bench according to the present invention.

[0022] The markings in the diagram are: 1-High voltage circuit, 2-Low voltage circuit, 3-Sampling circuit, 4-Three live wires and one neutral wire, 5-Inverter, 6-Air compressor, 7-Step-down converter, 8-Flow meter, 9-Pressure sensor, 10-Temperature sensor, 11-Air compressor temperature sensor, 12-Multi-channel digital display. Detailed Implementation

[0023] Depend on Figure 1 As shown, this utility model provides a fuel cell air compressor test bench, including a high-voltage circuit 1, a low-voltage circuit 2, and a sampling circuit 3.

[0024] Among them, the high-voltage circuit 1 is connected in sequence to the frequency converter 5 and the air compressor 6;

[0025] The low-voltage circuit 2 is connected to a step-down converter 7. The low-voltage circuit 2 is used to convert the input high voltage into a low voltage and then output it to the sampling circuit 3.

[0026] The sampling circuit 3 is equipped with an air compressor temperature sensor 11 for detecting the internal temperature of the air compressor 6, a flow meter 8 for detecting the flow rate of the air compressor 6, a pressure sensor 9 for detecting the pressure of the front and rear pipelines of the air compressor 6, and a temperature sensor 10 for detecting the temperature of the front and rear pipelines of the air compressor 6.

[0027] The high-voltage circuit 1 is a circuit with a voltage exceeding 36V that can drive the air compressor 6 and provide power to the entire test bench.

[0028] Specifically, the high-voltage circuit 1 is connected to the industrial power grid with a voltage of 380V. The high-voltage circuit 1 includes three live wires and one neutral wire (4); the low-voltage circuit 2 is connected to one live wire and one neutral wire in the high-voltage circuit 1, thereby inputting a voltage of 220V.

[0029] In this invention, the step-down converter 7 is used to convert 220V voltage to 24V.

[0030] In order to reflect the concept of "preventive protection takes precedence over reactive repair", high-voltage circuit 1 is equipped with an air switch K1 on each live wire and neutral wire and at one end of the industrial power grid connected to 380V, which can provide overload protection, short circuit protection and leakage protection for the circuit.

[0031] The fuel cell air compressor test bench of this utility model also includes a control mechanism, which receives signals from the air compressor temperature sensor 11, flow meter 8, pressure sensor 9, and temperature sensor 10 and controls the output frequency of the frequency converter 5.

[0032] The flow meter 8 collects the air flow rate through the pipeline during the operation of the air compressor 6; the pressure sensor 9 collects the pressure of the front and rear pipelines during the operation of the air compressor 6; the temperature sensor 10 collects the temperature of the front and rear pipelines during the operation of the air compressor 6; and the air compressor temperature sensor 11 collects the internal temperature of the air compressor 6 during the operation of the air compressor 6.

[0033] The sampling circuit 3 is connected to a multi-channel digital display 12, which is used to display the detection values ​​of the air compressor temperature sensor 11, flow meter 8, pressure sensor 9, and temperature sensor 10.

[0034] In use, the fuel cell air compressor test bench is connected to a 380V industrial power grid via line 4. When the air switch K1 is engaged, the frequency converter 5 and the step-down converter 7 are powered on. The step-down converter 7 converts 220V to 24V low-voltage electricity. After power-on, the air compressor's temperature sensor 11, flow meter 8, pressure sensor 9, and temperature sensor 10 begin to operate and transmit signals to the multi-channel digital display 12. The multi-channel digital display 12 displays the current flow rate, pressure, temperature, etc., through internal conversion. The voltage, current, and stage parameters of the air compressor 6 are input into the frequency converter 5, and the speed of the air compressor 6 is changed by adjusting the output frequency of the frequency converter 5. The parameters at different speeds are recorded and analyzed.

Claims

1. A fuel cell air compressor test stand, characterized by, The high-voltage circuit, the low-voltage circuit and the sampling circuit are included, The frequency converter and the air compressor are sequentially connected in the high-voltage circuit. The step-down converter is connected in the low-voltage circuit, and the low-voltage circuit is used for converting the input high voltage into low voltage and then outputting the low voltage to the sampling circuit. The air compressor temperature sensor for detecting the internal temperature of the air compressor, the flow meter for detecting the flow of the air compressor, the pressure sensor for detecting the pressure of the front pipe and the rear pipe of the air compressor, and the temperature sensor for detecting the temperature of the front pipe and the rear pipe of the air compressor are connected in the sampling circuit.

2. The fuel cell air compressor test stand of claim 1, wherein, The high-voltage circuit is a circuit with a voltage exceeding 36V and capable of driving the air compressor.

3. The fuel cell air compressor test stand of claim 2, wherein, The high-voltage circuit is connected to the 380V industrial power grid, and the high-voltage circuit includes three live wires and one neutral wire; the low-voltage circuit is connected to one live wire and one neutral wire in the high-voltage circuit, so as to input 220V voltage.

4. The fuel cell air compressor test stand of claim 3, wherein, The step-down converter is used for converting 220V voltage into 24V.

5. The fuel cell air compressor test stand of claim 3, wherein, The high-voltage circuit is provided with an air switch at one end of the 380V industrial power grid on each live wire and neutral wire.

6. The fuel cell air compressor test stand of claim 1, wherein, The control mechanism is further included, which receives the signals of the air compressor temperature sensor, the flow meter, the pressure sensor and the temperature sensor and controls the output frequency of the frequency converter.

7. The fuel cell air compressor test stand of claim 1, wherein, The multi-channel digital display meter is connected in the sampling circuit, and the multi-channel digital display meter is used for displaying the detection values of the air compressor temperature sensor, the flow meter, the pressure sensor and the temperature sensor.

Images