A modular test device for fuel cells

Abstract

The present invention provides a modular testing device for fuel cells, which belongs to the field of fuel cell technology and solves the problem that existing testing devices do not meet the current high-power test requirements and the testing process costs are too high. The device includes an air supply unit, a signal acquisition unit, a temperature control unit, and a host computer. The air supply end of the fuel cell to be tested is connected to the output end of the air supply unit, and the cooling end is connected to the temperature control unit. The signal acquisition unit collects the output electrical signal of the fuel cell to be tested in real time, and sends the power supply signals of the air supply unit, the signal acquisition unit, and the temperature control unit to the host computer. The host computer controls the start-up of the air supply unit, the signal acquisition unit, and the temperature control unit; and, based on the electrical signal output by the signal acquisition unit, determines the health status of the fuel cell and the total power consumption and power consumption trend of the device, and switches the power supply of each unit from single use to parallel mode when the total power consumption continues to increase or the collected electrical signals continue to increase.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a modular testing device for fuel cells. Background Art

[0002] The increasing power of fuel cells necessitates the development of high-power fuel cell test equipment. Existing low-power test equipment no longer meets current high-power testing requirements. During R&D, fuel cell systems require the acquisition of numerous test signals, but production line testing does not require as many. Using the same equipment for both R&D and production can result in high equipment investment and low cost-performance, or insufficient R&D test points, leading to inadequate test validation.

[0003] Existing test devices integrate gas piping, signal acquisition, and temperature control within a single test bench, resulting in numerous interrelated factors and making expansion difficult. Although CN105372599A discloses a modular fuel cell test bench, it is not suitable for scalability with increased power and signal acquisition.

[0004] Moreover, the off-line factory testing of fuel cells does not require too many signal collection points. If all signals are integrated in the test bench, the price of the test device will be very expensive. When the sensors are not matched, the test device needs to be redeveloped, which requires a large amount of labor and development costs. Summary of the Invention

[0005] In view of the above analysis, an embodiment of the present invention aims to provide a modular testing device for fuel cells to solve the problems that existing testing devices do not meet current high-power test requirements and the testing process is too costly.

[0006] On the one hand, an embodiment of the present invention provides a modular testing device for a fuel cell, comprising a gas supply unit, a signal acquisition unit, a temperature control unit, and a host computer; wherein,

[0007] The gas supply end of the fuel cell to be tested is connected to the output end of the gas supply unit, and the cooling end is connected to the temperature control unit; the signal acquisition unit is used to collect the output electrical signal of the fuel cell to be tested in real time, and send the power supply signals of the gas supply unit, signal acquisition unit, and temperature control unit to the host computer;

[0008] The host computer is used to control the start-up of the gas supply unit, the signal acquisition unit, and the temperature control unit respectively; and to judge the health status of the fuel cell based on the electrical signal output by the signal acquisition unit; when the fuel cell is in good health, further obtain the total power consumption and power consumption trend of the test device at the current moment, and switch the power supply mode of each gas supply unit, signal acquisition unit, and temperature control unit from individual power supply to parallel power supply when the total power consumption continues to increase or the collected electrical signals continue to increase.

[0009] The above technical solution has the following beneficial effects: Each air supply unit, signal acquisition unit, temperature control unit, and host computer can be manufactured as a standard module, making it easy to install and remove in the event of a fault. When power increases or the number of signals to be collected increases, modules can be connected in parallel to increase their power or functionality. The number of parallel modules can be set by the host computer.

[0010] Based on the further improvement of the above device, the device further includes a signal conversion unit; and,

[0011] The signal conversion unit is used to convert input data into output data in a standard format including data type and data volume; one side of the unit is provided with multiple independent ports, each port is connected to the input end of only one signal acquisition unit or the control end of one air supply unit or one temperature control unit, and the other side is provided with a port for connecting to the data end of the host computer;

[0012] The gas supply unit includes a nitrogen gas supply sub-unit, a hydrogen gas supply unit, an air gas supply sub-unit and an idle sub-unit.

[0013] Furthermore, the signal acquisition unit further includes a temperature and humidity acquisition module, a pressure acquisition module, a flow acquisition module and an electrical signal acquisition module; wherein,

[0014] The temperature and humidity acquisition module is provided between the gas supply unit and the connection branch of the fuel cell to be tested, and is used to collect the temperature and humidity of the gas entering the stack;

[0015] The pressure acquisition module is provided at the air inlet of the fuel cell to be tested and is used to collect the pressure of the gas entering the stack;

[0016] The flow collection module is provided at the air inlet of the fuel cell to be tested and is used to collect the flow of gas entering the stack;

[0017] The electrical signal acquisition module is respectively arranged at the power supply end of the fuel cell to be tested, the gas supply unit, the signal acquisition unit, and the temperature control unit, and is used to obtain the output voltage or current of the fuel cell to be tested, as well as the power supply voltage or current of the gas supply unit, the signal acquisition unit, and the temperature control unit.

[0018] Furthermore, the gas supply unit further comprises a nitrogen gas supply sub-unit, a hydrogen gas supply unit and an air gas supply sub-unit; wherein,

[0019] The output end of the nitrogen supply subunit and the output end of the hydrogen supply unit are connected in parallel and then connected to the anode gas input end of the fuel cell; the output end of the air supply subunit is directly connected to the cathode gas input end of the fuel cell.

[0020] Furthermore, the nitrogen supply subunit further includes a nitrogen tank, a one-way valve with a manual switch, and an electric control valve connected in sequence; wherein,

[0021] The control end of the first electrically controlled valve is connected to the output end of the host computer.

[0022] Furthermore, the hydrogen supply subunit further comprises a hydrogen tank, a manually switched one-way valve 2, and an electrically controlled valve 2, which are connected in sequence; wherein,

[0023] The control end of the second electrically controlled valve is connected to the output end of the host computer.

[0024] Furthermore, the air supply unit further includes an idle subunit; wherein,

[0025] The idle subunit includes an electrically controlled valve three; the input end of the electrically controlled valve three is vented to the air, and its output end is connected in parallel with the output end of the nitrogen supply subunit and the output end of the hydrogen supply unit, and then connected to the anode gas input end of the fuel cell, and its control end is connected to the output end of the host computer.

[0026] Furthermore, the air supply subunit further includes an air compressor and an electric control valve 4 connected in sequence; and,

[0027] The control end of the electric control valve 4 is connected to the output end of the host computer.

[0028] Furthermore, the host computer executes the following program:

[0029] Control the temperature control unit to start;

[0030] According to the test instruction, the corresponding gas supply unit and signal acquisition unit are started at the same time, so that the gas supply unit, signal acquisition unit and temperature control unit enter the series power supply mode;

[0031] After the output voltage or current signal of the fuel cell under test stabilizes, the health status of the fuel cell under test is determined based on the amplitude and phase of the output voltage or current signal combined with the temperature, humidity, gas pressure, and flow of the inlet gas. If the health status is good, the test process proceeds to the next step; otherwise, a signal indicating that the health status of the fuel cell under test is unqualified is output;

[0032] During the test, the total power consumption and power consumption trend of the test device at the current moment are obtained based on the power supply voltage or current of the gas supply unit, signal acquisition unit, and temperature control unit;

[0033] When the power consumption trend result shows that the total power consumption continues to increase or the signals collected by the signal acquisition unit continue to increase, the power supply mode of each gas supply unit, signal acquisition unit, and temperature control unit is switched from individual power supply to parallel power supply.

[0034] Furthermore, the device includes multiple air supply units, multiple signal acquisition units, and multiple temperature control units;

[0035] The host computer also executes the following procedures:

[0036] Monitor the data obtained by each signal acquisition unit in real time. If there is no data or the variation of the data per unit time always exceeds the set value, the signal acquisition unit is determined to be faulty, an alarm of the fault of the signal acquisition unit is issued, and the operation is automatically switched to another signal acquisition unit. Otherwise, the next step is executed;

[0037] Real-time monitoring of the gas flow entering the stack, and judging whether a gas supply unit is faulty based on the gas flow entering the stack. If faulty, the gas supply unit is shut down, a fault warning is issued, and gas supply to the fuel cell under test is automatically switched to another gas supply unit;

[0038] The temperature of the gas entering the stack is monitored in real time. Based on the temperature of the gas entering the stack, it is determined whether the temperature control unit is faulty. If faulty, the temperature control unit is shut down, a warning of the temperature control unit failure is issued, and other temperature control units are automatically switched to provide temperature control for the fuel cell under test.

[0039] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0040] 1. A modular design scheme is adopted to modularize and standardize the air supply unit, temperature control unit, signal acquisition unit, and host computer, making it easier to expand capacity according to test requirements. Unused modules can be disassembled at any time, reducing secondary investment labor costs and development costs.

[0041] 2. Each module is designed independently. Compared with the existing technology that integrates all test equipment in one test bench, the influence between signals is weakened, which improves the accuracy of test results.

[0042] 3. The supply and exhaust of nitrogen and hydrogen in the gas supply module are designed, and the switching of nitrogen and hydrogen can be realized according to the test function requirements.

[0043] 4. The test bench expansion mode is designed to be compatible with low-power and high-power engines, with good compatibility.

[0044] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the disclosure, nor is it intended to limit the scope of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0046] Figure 1 A schematic diagram of the modular testing device for fuel cells according to Example 1 is shown;

[0047] Figure 2 A schematic diagram showing the connections of a modular testing device for a fuel cell according to Example 2 is shown;

[0048] Figure 3 A second connection schematic diagram of a modular testing device for fuel cells according to Example 2 is shown. DETAILED DESCRIPTION

[0049] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] As used herein, the term "including" and its variations represent open inclusion, i.e., "including but not limited to." Unless otherwise stated, the term "or" means "and / or." The term "based on" means "based at least in part on." The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one additional embodiment." The terms "first," "second," etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0051] Example 1

[0052] One embodiment of the present invention discloses a modular testing device for a fuel cell, such as Figure 1 As shown, it includes an air supply unit, a signal acquisition unit, a temperature control unit, and a host computer.

[0053] The gas supply terminal of the fuel cell under test is connected to the output terminal of the gas supply unit, and the cooling terminal is connected to the temperature control unit. The signal acquisition unit is used to collect the output electrical signals of the fuel cell under test in real time, as well as the power supply signals of the gas supply unit, signal acquisition unit, and temperature control unit, and transmit them to the host computer. The output terminal of the host computer is connected to the control terminals of the gas supply unit, signal acquisition unit, and temperature control unit, respectively.

[0054] The host computer is used to control the start-up of the gas supply unit, the signal acquisition unit, and the temperature control unit respectively; and to judge the health status of the fuel cell based on the electrical signal output by the signal acquisition unit; when the fuel cell is in good health, further obtain the total power consumption and power consumption trend of the test device at the current moment, and switch the power supply mode of each gas supply unit, signal acquisition unit, and temperature control unit from individual power supply to parallel power supply when the total power consumption continues to increase or the collected electrical signals continue to increase.

[0055] Compared to existing technologies, the air supply unit, signal acquisition unit, temperature control unit, and host computer in the device provided in this embodiment can all be manufactured as standard modules, making them easy to install and remove in the event of a fault. When power increases or the number of signals collected increases, modules can be connected in parallel to increase their power or functionality. The number of parallel modules can be set by the host computer.

[0056] Example 2

[0057] Based on the improvement of Example 1, the modular testing device for fuel cells further includes a signal conversion unit, such as Figure 3 shown.

[0058] The signal conversion unit converts input data into output data in a standard format, including data type and data volume. The specific format can be data type + data volume + fixed field data. One side of the unit has multiple independent ports, each of which connects to the input of a signal acquisition unit or the control port of an air supply unit or a temperature control unit. The other side has a port for connecting to the data port of the host computer.

[0059] Preferably, the signal acquisition unit further includes a temperature and humidity acquisition module, a pressure acquisition module, a flow acquisition module and an electrical signal acquisition module.

[0060] The temperature and humidity acquisition module is located between the gas supply unit and the connection branch of the fuel cell to be tested, and is used to collect the temperature and humidity of the gas entering the stack.

[0061] The pressure acquisition module is installed at the air inlet of the fuel cell to be tested and is used to collect the pressure of the gas entering the stack.

[0062] The flow acquisition module is installed at the air inlet of the fuel cell to be tested and is used to collect the flow of gas entering the stack.

[0063] The electrical signal acquisition module is respectively arranged at the power supply end of the fuel cell to be tested, the gas supply unit, the signal acquisition unit, and the temperature control unit, and is used to obtain the output voltage or current of the fuel cell to be tested, as well as the power supply voltage or current of the gas supply unit, the signal acquisition unit, and the temperature control unit.

[0064] Preferably, the signal acquisition unit further includes an ambient temperature acquisition unit, which is arranged inside or on the surface of the housing of the device.

[0065] Preferably, the gas supply unit further comprises a nitrogen gas supply sub-unit, a hydrogen gas supply unit, and an air gas supply sub-unit. The output of the nitrogen gas supply sub-unit and the output of the hydrogen gas supply unit are connected in parallel and then connected to the anode gas input of the fuel cell; the output of the air gas supply sub-unit is directly connected to the cathode gas input of the fuel cell.

[0066] Preferably, the nitrogen supply subunit further comprises a nitrogen tank, a manually switchable one-way valve 1, and an electric control valve 1 connected in sequence, wherein the control end of the electric control valve 1 is connected to the output end of the host computer.

[0067] Preferably, the hydrogen supply subunit further comprises a hydrogen tank, a manually switchable one-way valve 2, and an electrically controlled valve 2, which are connected in sequence, wherein the control end of the electrically controlled valve 2 is connected to the output end of the host computer.

[0068] Preferably, the gas supply unit further includes an idle subunit. The idle subunit includes an electrically controlled valve 3; the input end of the electrically controlled valve 3 is vented to the air, the output end of the valve 3 is connected in parallel to the output end of the nitrogen gas supply subunit and the output end of the hydrogen gas supply unit, and then connected to the anode gas input end of the fuel cell; and the control end of the valve 3 is connected to the output end of the host computer.

[0069] Preferably, the air supply subunit further comprises an air compressor and an electric control valve 4 connected in sequence. Moreover, the control end of the electric control valve 4 is connected to the output end of the host computer.

[0070] Preferably, the host computer executes the following program:

[0071] S1. Start the temperature control unit;

[0072] S2. According to the test instruction, the corresponding gas supply unit and signal acquisition unit are started simultaneously, so that the gas supply unit, signal acquisition unit and temperature control unit enter the series power supply mode;

[0073] S3. After the output voltage or current signal of the fuel cell to be tested stabilizes, the health status of the fuel cell to be tested is determined based on the amplitude and phase of the output voltage or current signal combined with the temperature, humidity, gas pressure, and flow rate of the gas entering the stack; if the health status is good, the test process continues to the next step; otherwise, a signal indicating that the health status of the fuel cell to be tested is unqualified is output;

[0074] S4. During the test, the total power consumption and power consumption trend of the test device at the current moment are obtained based on the supply voltage or current of the gas supply unit, the signal acquisition unit, and the temperature control unit;

[0075] S5. When the power consumption trend result shows that the total power consumption continues to increase or the signals collected by the signal acquisition unit continue to increase, the power supply mode of each gas supply unit, signal acquisition unit, and temperature control unit is switched from individual power supply to parallel power supply.

[0076] Preferably, the modular testing device includes multiple air supply units, multiple signal acquisition units, and multiple temperature control units, such as Figures 2-3 Each air supply unit, signal acquisition unit, and temperature control unit adopts modular and standardized design, which can be easily added, reduced, or replaced according to needs.

[0077] Preferably, the host computer also executes the following program:

[0078] S6. Real-time monitoring of the data obtained by each signal acquisition unit. If there is no data or the amplitude of the data change per unit time always exceeds the set value, the signal acquisition unit is determined to be faulty, an alarm of the signal acquisition unit failure is issued, and the work of other signal acquisition units is automatically switched. Otherwise, the next step is executed;

[0079] S7. Real-time monitoring of the gas flow into the stack, according to the gas flow into the stack to determine whether the gas supply unit is faulty, if a fault occurs, shut down the gas supply unit, issue a warning of the gas supply unit failure, and automatically switch to other gas supply units to supply gas to the fuel cell under test;

[0080] S8. Monitor the temperature of the gas entering the stack in real time, and determine whether the temperature control unit is faulty based on the temperature of the gas entering the stack. If faulty, shut down the temperature control unit, issue a warning of the temperature control unit failure, and automatically switch to other temperature control units to provide temperature control for the fuel cell under test.

[0081] Preferably, the host computer has a display module; the display screen of the display module displays the startup status of each gas supply unit, each signal acquisition unit, and each temperature control unit, as well as the power supply mode, and the operating parameters of the fuel cell to be tested collected by the signal acquisition unit (including the temperature, humidity, pressure, flow of the gas entering the stack, the output voltage or current of the fuel cell to be tested, and the power supply voltage or current of the gas supply unit, signal acquisition unit, and temperature control unit).

[0082] Preferably, the modular fuel cell testing device further comprises a power supply unit for providing working power to the gas supply unit, the signal acquisition unit, and the temperature control unit. The power supply unit is an AC power supply.

[0083] Compared with Example 1, the device provided in this embodiment has the following beneficial effects:

[0084] 1. A modular design scheme is adopted to modularize and standardize the air supply unit, temperature control unit, signal acquisition unit, and host computer, making it easier to expand capacity according to test requirements. Unused modules can be disassembled at any time, reducing secondary investment labor costs and development costs.

[0085] 2. Each module is designed independently. Compared with the existing technology that integrates all test equipment in one test bench, the influence between signals is weakened, which improves the accuracy of test results.

[0086] 3. The supply and exhaust of nitrogen and hydrogen in the gas supply module are designed, and the switching of nitrogen and hydrogen can be realized according to the test function requirements.

[0087] 4. The test bench expansion mode is designed to be compatible with low-power and high-power engines, with good compatibility.

[0088] While various embodiments of the present disclosure have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements over the prior art, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A modular testing device for a fuel cell, characterized in that: It includes air supply unit, signal acquisition unit, temperature control unit, and host computer; among them, The gas supply end of the fuel cell to be tested is connected to the output end of the gas supply unit, and the cooling end is connected to the temperature control unit; the signal acquisition unit is used to collect the output electrical signal of the fuel cell to be tested, as well as the power supply signals of the gas supply unit, signal acquisition unit, and temperature control unit in real time, and send them to the host computer; The host computer is used to control the start-up of the gas supply unit, the signal acquisition unit, and the temperature control unit respectively; and to determine the health status of the fuel cell based on the electrical signal output by the signal acquisition unit. When the fuel cell is in good health, the host computer further obtains the total power consumption and power consumption trend of the test device at the current moment, and switches the power supply mode of each gas supply unit, the signal acquisition unit, and the temperature control unit from individual power supply to parallel power supply when the total power consumption continues to increase or the collected electrical signals continue to increase; Also included is a signal conversion unit; and the signal conversion unit is used to convert the input data into output data in a standard format including data type and data amount; The gas supply unit includes a nitrogen gas supply sub-unit, a hydrogen gas supply unit, an air gas supply sub-unit and an idle sub-unit.

2. The modular testing device for fuel cells according to claim 1, characterized in that: The signal conversion unit has multiple independent ports on one side, each port is only connected to the input end of a signal acquisition unit or the control end of an air supply unit or a temperature control unit, and the other side is provided with a port for connecting to the data end of the host computer.

3. The modular testing device for fuel cells according to claim 1 or 2, characterized in that: The signal acquisition unit further includes a temperature and humidity acquisition module, a pressure acquisition module, a flow acquisition module and an electrical signal acquisition module; wherein, The temperature and humidity acquisition module is provided between the gas supply unit and the connection branch of the fuel cell to be tested, and is used to collect the temperature and humidity of the gas entering the stack; The pressure acquisition module is provided at the air inlet of the fuel cell to be tested and is used to collect the pressure of the gas entering the stack; The flow collection module is provided at the air inlet of the fuel cell to be tested and is used to collect the flow of gas entering the stack; The electrical signal acquisition module is respectively arranged at the power supply end of the fuel cell to be tested, the gas supply unit, the signal acquisition unit, and the temperature control unit, and is used to obtain the output voltage or current of the fuel cell to be tested, as well as the power supply voltage or current of the gas supply unit, the signal acquisition unit, and the temperature control unit.

4. The modular testing device for fuel cells according to claim 1, wherein: The output end of the nitrogen supply subunit and the output end of the hydrogen supply unit are connected in parallel and then connected to the anode gas input end of the fuel cell; the output end of the air supply subunit is directly connected to the cathode gas input end of the fuel cell.

5. The modular testing device for fuel cells according to claim 4, characterized in that: The nitrogen supply subunit further includes a nitrogen tank, a manually switched one-way valve 1, and an electrically controlled valve 1, which are connected in sequence; wherein, The control end of the first electrically controlled valve is connected to the output end of the host computer.

6. The modular testing device for fuel cells according to claim 4 or 5, characterized in that: The hydrogen supply subunit further includes a hydrogen tank, a manually switched one-way valve 2, and an electrically controlled valve 2, which are connected in sequence; wherein, The control end of the second electrically controlled valve is connected to the output end of the host computer.

7. The modular testing device for fuel cells according to claim 1, characterized in that: The idle subunit includes an electrically controlled valve three; the input end of the electrically controlled valve three is vented to the air, and its output end is connected in parallel with the output end of the nitrogen supply subunit and the output end of the hydrogen supply unit, and then connected to the anode gas input end of the fuel cell, and its control end is connected to the output end of the host computer.

8. The modular testing device for fuel cells according to any one of claims 4 to 5 and 7, characterized in that: The air supply sub-unit further includes an air compressor and an electric control valve 4 connected in sequence; and The control end of the electric control valve 4 is connected to the output end of the host computer.

9. The modular testing device for fuel cells according to any one of claims 1-2, 4-5, and 7, characterized in that: The host computer executes the following procedures: Control the temperature control unit to start; According to the test instruction, the corresponding gas supply unit and signal acquisition unit are started at the same time, so that the gas supply unit, signal acquisition unit and temperature control unit enter the series power supply mode; After the output voltage or current signal of the fuel cell under test stabilizes, the health status of the fuel cell under test is determined based on the amplitude and phase of the output voltage or current signal combined with the temperature, humidity, gas pressure, and flow of the inlet gas. If the health status is good, the test process proceeds to the next step; otherwise, a signal indicating that the health status of the fuel cell under test is unqualified is output; During the test, the total power consumption and power consumption trend of the test device at the current moment are obtained based on the power supply voltage or current of the gas supply unit, signal acquisition unit, and temperature control unit; When the power consumption trend result shows that the total power consumption continues to increase or the signals collected by the signal acquisition unit continue to increase, the power supply mode of each gas supply unit, signal acquisition unit, and temperature control unit is switched from individual power supply to parallel power supply.

10. The modular testing device for fuel cells according to claim 9, characterized in that: It includes multiple air supply units, multiple signal acquisition units, and multiple temperature control units; The host computer also executes the following procedures: Monitor the data obtained by each signal acquisition unit in real time. If there is no data or the variation of the data per unit time always exceeds the set value, the signal acquisition unit is determined to be faulty, an alarm of the fault of the signal acquisition unit is issued, and the operation is automatically switched to another signal acquisition unit. Otherwise, the next step is executed; Real-time monitoring of the gas flow entering the stack, and judging whether a gas supply unit is faulty based on the gas flow entering the stack. If faulty, the gas supply unit is shut down, a fault warning is issued, and gas supply to the fuel cell under test is automatically switched to another gas supply unit; The temperature of the gas entering the stack is monitored in real time. Based on the temperature of the gas entering the stack, it is determined whether the temperature control unit is faulty. If faulty, the temperature control unit is shut down, a warning of the temperature control unit failure is issued, and other temperature control units are automatically switched to provide temperature control for the fuel cell under test.

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