Fuel cell performance testing device and method

Abstract

The present invention relates to a fuel cell performance testing device and method, the device includes a central processing unit, and a load module, a fuel cell module, a DC power supply module, a parameter measurement module and a dynamometer connected to the central processing unit in communication; the fuel cell is connected to a load controller after being connected in parallel with a DC power supply, and under the control of the central processing unit, the output power of the DC power supply is λ times the output power of the fuel cell. Compared with the prior art, the present invention sets a DC power supply connected in parallel with the fuel cell, and adjusts the power of the load, the fuel cell and the DC power supply through the central processing unit, so that the output power of the fuel cell changes proportionally with the load, so that the performance of the fuel cell can be studied in a high-power load application scenario, the structure is simple, the cost is low, and it is conducive to the promotion and application of research institutions such as universities.

Description

Technical Field

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

[0002] Hydrogen-oxygen fuel cells have outstanding advantages such as zero emission and green environmental protection, and have great application prospects. However, in many application scenarios, the load demand power will change rapidly. When the load power changes rapidly, the output power of the fuel cell will also change rapidly. Especially in automobiles, the fuel cell output power response speed is required to be fast and the service life is long. This is also the bottleneck of the current application of fuel cell technology in passenger cars, and it is also a difficult problem that many scientific research institutions and companies are focusing on. Therefore, it is of great significance to study the operating characteristics of fuel cells when the output power changes rapidly.

[0003] For low-power loads, the operating data of the fuel cell when the output power changes rapidly can be measured by directly changing the load's required power. However, for high-power loads, it is necessary to build a high-power fuel cell stack that matches the high-power load, which is difficult and costly. At present, most domestic research units are still focusing on studying the operating characteristics of fuel cells in low-power load application scenarios. In high-power load application scenarios, the analysis and research on the operating characteristics of fuel cell stacks is insufficient. Summary of the invention

[0004] The purpose of the present invention is to provide a fuel cell performance testing device and method in order to overcome the defects of the above-mentioned prior art. A DC power supply is set in parallel with the fuel cell, and the power of the load, fuel cell and DC power supply is adjusted by the central processing unit so that the output power of the fuel cell changes proportionally with the load. In this way, the performance of the fuel cell can be studied under high-power load application scenarios. The device has a simple structure and low cost, which is conducive to promotion and application in research institutions such as universities.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A fuel cell performance testing device comprises a load module, a fuel cell module, a DC power supply module, a parameter measurement module, a dynamometer and a central processing unit;

[0007] The load module includes a load and a load controller connected to the load; the load controller is in communication with the central processor, and the central processor changes the required power of the load through the load controller;

[0008] The fuel cell module includes a fuel cell and a fuel cell controller connected to the fuel cell; the fuel cell controller is in communication with a central processing unit, and the central processing unit changes the output power of the fuel cell through the fuel cell controller;

[0009] The DC power supply module includes a DC power supply and a DC controller connected to the DC power supply; the DC controller is in communication with the central processing unit, and the central processing unit changes the output power of the DC power supply through the DC controller, and under the control of the central processing unit, the output power of the DC power supply is λ (λ≠0) times the output power of the fuel cell, where λ is a preset proportionality coefficient;

[0010] The fuel cell and the DC power supply are connected in parallel to a load controller;

[0011] The parameter measurement module is connected to the fuel cell and is used to measure the operating parameters of the fuel cell. The parameter measurement module is also connected to the central processing unit for communication and transmits the measured operating parameters of the fuel cell to the central processing unit.

[0012] The dynamometer is connected to the load and is used to measure the output power of the load. The dynamometer is also connected to the central processing unit for communication and transmits the measured output power of the load to the central processing unit.

[0013] The central processing unit is used to obtain control commands input by the user, generate control signals for the load controller, the fuel cell controller and the DC controller according to the control commands input by the user and the output power of the load measured by the dynamometer, obtain the operating parameters of the fuel cell measured by the parameter measurement module and perform data analysis on them.

[0014] Furthermore, the load controller, fuel cell controller, DC controller and dynamometer are connected to the central processing unit via wireless communication.

[0015] Furthermore, the fuel cell includes a fuel cell stack, a fuel cell reactant supply device and a DCDC booster, the fuel cell stack is respectively connected to the fuel cell controller, the fuel cell reactant supply device and the DCDC booster, the fuel cell reactant supply device is connected to the fuel cell controller, and the DCDC booster is connected to the load controller in parallel with the DC power supply.

[0016] Furthermore, the DC power supply is a storage battery.

[0017] Furthermore, the testing device also includes a power supply module, which is respectively connected to the load controller, the fuel cell controller, the DC controller and the dynamometer, and is used to provide working power for the load controller, the fuel cell controller, the DC controller and the dynamometer.

[0018] Furthermore, the power supply module is an AC power supply.

[0019] Furthermore, the testing device also includes a frame, and the load module, fuel cell module, DC power supply module and dynamometer are all arranged on the frame.

[0020] Furthermore, the testing device also includes an input module, which is connected to the central processing unit and is used to input control commands of the load controller, the fuel cell controller and the DC controller.

[0021] Furthermore, the testing device also includes a display module, which is connected to the central processing unit and is used to display the operating parameters of the fuel cell measured by the parameter measurement module.

[0022] A method for testing fuel cell performance, based on the testing device as described above, comprises the following steps:

[0023] S1: Obtain the maximum power requirement of the load, select a fuel cell and a DC power supply that match the load, and determine the proportionality coefficient λ so that the maximum output power of the fuel cell and the maximum power requirement of the load satisfy the following formula:

[0024] (1+λ)P 2_max_output >P 1_max_need

[0025] Among them, P 1_max_need is the maximum required power of the load, P 2_max_output is the maximum output power of the fuel cell;

[0026] S2: Connect and debug the load module, fuel cell module, DC power supply module, parameter measurement module, dynamometer and central processor. The central processor adjusts the required power of the load according to the user's control command;

[0027] S3: The CPU obtains the required power P of the load 1_need , if P 1_need >(1+λ)P 2_max_output , then execute step S5, otherwise, execute step S4;

[0028] S4: The central processor adjusts the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship:

[0029] P 1_need =P 1_output =η×P 1_input

[0030] P 1_input =P2_output +P 3_output =P 2_output +λP 2_putput =(1+λ)×P 2_output

[0031] Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply;

[0032] S5: The central processor adjusts the required power of the load, the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell is the maximum output power P 2_max_output , so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship:

[0033] P 1_need =P 1_output =η×P 1_input

[0034] P 1_input =P 2_max_output +P 3_output

[0035] Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply;

[0036] S6: The central processing unit obtains the operating parameters of the fuel cell measured by the parameter measurement module and performs data analysis on the parameters;

[0037] S7: The central processing unit adjusts the required power of the load according to the control command of the user, and repeats step S3 until the test of the fuel cell performance is stopped.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) A DC power supply is set in parallel with the fuel cell. The power of the load, fuel cell and DC power supply is adjusted by the central processor so that the output power of the fuel cell changes proportionally with the load. In this way, the performance of the fuel cell can be studied in a high-power load application scenario. The structure is simple and the cost is low, which is conducive to the promotion and application of research institutions such as universities.

[0040] (2) A separate power supply module is set up to power the load controller, fuel cell controller, etc., which does not affect the work of the load, fuel cell, etc. and reduces the complexity of the system.

[0041] (3) By measuring the operating parameters of the fuel cell through the parameter measurement module, the impact of different load conditions on the operating characteristics of the fuel cell can be analyzed.

[0042] (4) The output power of the load is measured by a dynamometer. When the output power of the load is not equal to the required power, the fuel cell and the DC power supply are adjusted in real time to achieve higher control accuracy.

[0043] (5) Under the control of the central processing unit, the output power of the DC power supply is λ times the output power of the fuel cell, with fewer control variables and a simpler control process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the test device;

[0045] Figure 2 is a graph showing the variation of the fuel cell output power with the load demand power in the embodiment;

[0046] Figure numerals: 11. load controller, 12. load, 21. fuel cell controller, 22. fuel cell, 31. DC controller, 32. DC power supply, 4. parameter measurement module, 5. dynamometer, 6. central processing unit. DETAILED DESCRIPTION

[0047] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] Embodiment 1:

[0049] A fuel cell performance testing device, such as Figure 1 As shown, it includes a load module, a fuel cell module, a DC power supply module, a parameter measurement module 4, a dynamometer 5 and a central processing unit 6.

[0050] The load module includes a load 12 and a load controller 11 connected to the load 12; the load controller 11 is in communication with the central processor 6, and the central processor 6 changes the required power of the load 12 through the load controller 11;

[0051] The fuel cell module includes a fuel cell 22 and a fuel cell controller 21 connected to the fuel cell 22 ; the fuel cell controller 21 is in communication connection with the central processor 6 , and the central processor 6 changes the output power of the fuel cell 22 through the fuel cell controller 21 .

[0052] In this embodiment, the fuel cell 22 includes a fuel cell stack, a fuel cell reactant supply device and a DCDC booster. The fuel cell stack is connected to the fuel cell controller 21, the fuel cell reactant supply device and the DCDC booster respectively. The fuel cell reactant supply device is connected to the fuel cell controller 21. The DCDC booster is connected to the DC power supply 32 in parallel and then connected to the load controller 11.

[0053] The DC power supply module includes a DC power supply 32 and a DC controller 31 connected to the DC power supply 32; the DC controller 31 is in communication with the central processor 6, and the central processor 6 changes the output power of the DC power supply 32 through the DC controller 31, and under the control of the central processor 6, the output power of the DC power supply 32 is λ (λ≠0) times the output power of the fuel cell 22, where λ is a preset proportionality coefficient;

[0054] Considering the cost and difficulty of construction, the fuel cell 22 used in laboratory research has a relatively low power. When the power of the load 12 is relatively low, the fuel cell 22 can match the load 12, directly changing the required power of the load 12, and the output power of the fuel cell 22 also changes accordingly, so that the performance change of the fuel cell 22 can be studied. When the power of the load 12 is relatively high, the fuel cell 22 cannot match the load 12, and the DC power supply 32 and the fuel cell 22 are used as the input of the load 12 together.

[0055] The fuel cell 22 and the DC power supply 32 are connected in parallel to the load controller 11; the sum of the output power of the DC power supply 32 and the output power of the fuel cell 22 is the input power of the load 12, and the input power of the load 12 is (1+λ) times the output power of the fuel cell 22, so that the output power of the fuel cell 22 changes in proportion to the required power of the load 12. In this way, there is no need to build a high-power fuel cell 22, and the performance change of the fuel cell 22 under a high-power load 12 can be directly studied. In this embodiment, the DC power supply 32 is an energy storage battery that can provide different amounts of power. In other embodiments, the DC power supply 32 can also be other DC power supply devices.

[0056] The parameter measurement module 4 is connected to the fuel cell 22 and is used to measure the operating parameters of the fuel cell 22. The parameter measurement module 4 is also connected to the central processor 6 for communication and transmits the measured operating parameters of the fuel cell 22 to the central processor 6; the central processor 6 analyzes the operating parameters of the fuel cell 22 to study the performance changes of the fuel cell 22, etc.

[0057] The dynamometer 5 is connected to the load 12 for measuring the output power of the load 12. The dynamometer 5 is also connected to the central processing unit 6 for communication and transmits the measured output power of the load 12 to the central processing unit 6. In theory, the output power of the load 12 is equal to the required power of the load 12. However, in the actual control process, fluctuations may occur. Therefore, after the required power of the load 12 is set, the output power of the load 12 must be measured by the dynamometer 5. If the output power is not equal to the required power, the central processing unit 6 will control the fuel cell controller 21 and the DC controller 31 so that the output power of the load 12 is equal to the required power.

[0058] The central processor 6 is used to obtain the control command input by the user, generate control signals for the load controller 11, the fuel cell controller 21 and the DC controller 31 according to the control command input by the user and the output power of the load 12 measured by the dynamometer 5, obtain the operating parameters of the fuel cell 22 measured by the parameter measurement module 4 and perform data analysis on them. The control command input by the user includes the required power of the load 12. For example, if the control command input by the user causes the load 12 to operate according to the required power curve under a certain working condition, the required power of the load 12 changes with time.

[0059] In this embodiment, the load controller 11, the fuel cell controller 21, the DC controller 31 and the dynamometer 5 are connected to the central processor 6 by wireless communication, which reduces the number of wiring and makes the connection more flexible, and the positions of the load controller 11, the fuel cell controller 21, the DC controller 31 and the dynamometer 5 and the central processor 6 can be adjusted arbitrarily. In other embodiments, communication can also be carried out by data line connection, and wired communication can ensure the reliability of communication.

[0060] The test device further includes a power supply module, which is respectively connected to the load controller 11, the fuel cell controller 21, the DC controller 31 and the dynamometer 5, and is used to provide working power to the load controller 11, the fuel cell controller 21, the DC controller 31 and the dynamometer 5. In this embodiment, the power supply module is an AC power supply.

[0061] The load controller 11, the fuel cell controller 21, the DC controller 31 and the dynamometer 5 are powered separately by the power supply module, which does not affect the load 12, the fuel cell 22 and the DC power supply 32, reduces the system complexity and has fewer control variables.

[0062] The test device also includes a frame, and the load module, the fuel cell module, the DC power supply module and the dynamometer 5 are all arranged on the frame.

[0063] The testing device further includes an input module, which is connected to the central processor 6 and is used to input control commands of the load controller 11 , the fuel cell controller 21 and the DC controller 31 .

[0064] The testing device further includes a display module, which is connected to the central processor 6 and is used to display the operating parameters of the fuel cell 22 measured by the parameter measurement module 4 .

[0065] The test device may also be added with a storage module, which is connected to the central processor 6 and is used to store the operating parameters of the fuel cell 22 measured by the parameter measurement module 4. The operating parameters stored in the storage module may be viewed and analyzed later. In this embodiment, the storage module is a storage device such as a USB flash drive or a hard disk. In other embodiments, a cloud storage platform may also be used.

[0066] In this embodiment, the central processor 6 is a computer, the input module is a keyboard, and the display module is a display screen. The user sets the required power of the load 12 through the computer, and then adjusts the output power of the fuel cell 22 and the DC power supply 32. The sum of the output power of the fuel cell 22 and the DC power supply 32 is the input power of the load 12. When the required power of the load 12 changes, the output power of the fuel cell 22 also changes accordingly. The parameter measurement module 4 continuously measures the working parameters of the fuel cell 22, such as current, voltage, internal structure parameters, etc., and displays these data and the analysis results of these data on the display screen.

[0067] A method for testing fuel cell performance comprises the following steps:

[0068] S1: Obtain the maximum power requirement of the load, select a fuel cell and a DC power supply that match the load, and determine the proportionality coefficient λ so that the maximum output power of the fuel cell and the maximum power requirement of the load satisfy the following formula:

[0069] (1+λ)P 2_max_output >P 1_max_need

[0070] Among them, P 1_max_need is the maximum required power of the load, P 2_max_output is the maximum output power of the fuel cell;

[0071] S2: Connect and debug the load module, fuel cell module, DC power supply module, parameter measurement module, dynamometer and central processor. The central processor adjusts the required power of the load according to the user's control command;

[0072] S3: The CPU obtains the required power P of the load 1_need , if P 1_need >(1+λ)P 2_max_output , then execute step S5, otherwise, execute step S4;

[0073] S4: The central processor adjusts the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship:

[0074] P 1_need =P 1_output =η×P 1_input

[0075] P 1_input =P 2_output +P 3_output =P 2_output +λP 2_putput =(1+λ)×P 2_output

[0076] Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply;

[0077] S5: The central processor adjusts the required power of the load, the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell is the maximum output power P 2_max_output , so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship:

[0078] P 1_need =P 1_output =η×P 1_input

[0079] P 1_input =P 2_max_output +P 3_output

[0080] Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply;

[0081] S6: The central processing unit obtains the operating parameters of the fuel cell measured by the parameter measurement module and performs data analysis on the parameters;

[0082] S7: The central processing unit adjusts the required power of the load according to the control command of the user, and repeats step S3 until the test of the fuel cell performance is stopped.

[0083] In this embodiment, the load 12 is a vehicle motor. The load controller 11 adjusts the required power of the vehicle motor by controlling the torque and speed of the vehicle motor. The maximum required power P of the load 12 is 1_max_need The maximum output power P of the fuel cell 22 is 29kw. 2_max_output is 10kw. During the test, the central processor 6 adjusts the output power of the DC power supply 32 to be λ times the output power of the fuel cell 22. In this way, the following formula can be obtained:

[0084] P 1_input =P 2_output +P 3_output =P 2_output +λP 2_output =(1+λ)×P 2_output

[0085] In this embodiment, λ is set to 2, the input power of the load 12 is 3 times the output power of the fuel cell 22 , and the output power of the fuel cell 22 changes in proportion to the input power of the load 12 .

[0086] By connecting a DC power supply 32 whose output power is λ times the output power of the fuel cell 22 in parallel to the fuel cell 22, the output power of the fuel cell 22 can vary proportionally with the input power of the load 12. In the application scenario of a high-power load 12, the performance of the fuel cell 22 can be tested by changing the required power of the high-power load 12.

[0087] like Figure 2 As shown, when the required power of the load 12 changes, the output power of the fuel cell 22 also changes accordingly, and the changing trends are basically consistent.

[0088] In order to ensure the safety of the fuel cell 22, an overload protection is set, that is, step S5, the central processor 6 controls the output power of the fuel cell 22 to be always less than the preset safety value, and no overload occurs. When the power demand of the load 12 suddenly changes, if the output power of the fuel cell 22 is increased to the preset safety value, it still cannot meet P 1_input =(1+λ)×P 2_output, the output power of the fuel cell 22 will not be increased further, but the output power of the DC power supply 32 will be increased. In this way, although the fuel cell 22 cannot follow the change of the load 12 in proportion, the safety of the fuel cell 22 is ensured.

[0089] After the load 12 runs for a period of time under certain working conditions, such as 1000 hours, the output voltage curve, output current curve, output power curve, etc. of the fuel cell 22 can be obtained through the parameter measurement module 4, and the performance degradation of the fuel cell 22 can be analyzed, and then the durability of the fuel cell 22 can be studied.

[0090] The test device provided in the present application can also be used to test the performance changes of two fuel cells 22 with different optimization schemes, so as to study whether the optimization scheme of the fuel cell 22 is reasonable.

[0091] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A method for testing fuel cell performance, characterized in that: Based on the test device, the test device includes a load module, a fuel cell module, a DC power supply module, a parameter measurement module (4), a dynamometer (5) and a central processing unit (6); The load module comprises a load (12) and a load controller (11) connected to the load (12); the load controller (11) is in communication connection with a central processor (6), and the central processor (6) changes the required power of the load (12) through the load controller (11); The fuel cell module comprises a fuel cell (22) and a fuel cell controller (21) connected to the fuel cell (22); the fuel cell controller (21) is communicatively connected to a central processing unit (6), and the central processing unit (6) changes the output power of the fuel cell (22) through the fuel cell controller (21); The DC power supply module comprises a DC power supply (32) and a DC controller (31) connected to the DC power supply (32); the DC controller (31) is in communication connection with a central processing unit (6); the central processing unit (6) changes the output power of the DC power supply (32) through the DC controller (31); and under the control of the central processing unit (6), the output power of the DC power supply (32) is λ (λ≠0) times the output power of the fuel cell (22), where λ is a preset proportionality coefficient; The fuel cell (22) and the DC power supply (32) are connected in parallel to a load controller (11); The parameter measurement module (4) is connected to the fuel cell (22) and is used to measure the operating parameters of the fuel cell (22). The parameter measurement module (4) is also connected to the central processor (6) in communication and transmits the measured operating parameters of the fuel cell (22) to the central processor (6); The dynamometer (5) is connected to the load (12) and is used to measure the output power of the load (12). The dynamometer (5) is also connected to the central processing unit (6) in communication and transmits the measured output power of the load (12) to the central processing unit (6); The central processor (6) is used to obtain a control command input by a user, generate control signals for a load controller (11), a fuel cell controller (21) and a DC controller (31) according to the control command input by the user and the output power of a load (12) measured by a dynamometer (5), obtain the operating parameters of the fuel cell (22) measured by a parameter measurement module (4), and perform data analysis on the parameters; The test method includes the following steps: S1: Obtain the maximum power requirement of the load, select a fuel cell and a DC power supply that match the load, and determine the proportionality coefficient λ so that the maximum output power of the fuel cell and the maximum power requirement of the load satisfy the following formula: (1+λ)P 2_max_output >P 1_max_need Among them, P 1_max_need is the maximum required power of the load, P 2_max_output is the maximum output power of the fuel cell; S2: Connect and debug the load module, fuel cell module, DC power supply module, parameter measurement module, dynamometer and central processor. The central processor adjusts the required power of the load according to the user's control command; S3: The CPU obtains the required power P of the load 1_need , if P 1_need >(1+λ)P 2_max_output , then execute step S5, otherwise, execute step S4; S4: The central processor adjusts the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship: P 1_need =P 1_output =η×P 1_input P 1_input =P 2_output +P 3_output =P 2_output +λP 2_output =(1+λ)×P 2_output Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply; S5: The central processor adjusts the required power of the load, the output power of the fuel cell and the output power of the DC power supply, and then executes step S6 so that the output power of the fuel cell is the maximum output power P 2_max_output , so that the output power of the fuel cell and the output power of the DC power supply satisfy the following relationship: P 1_need =P 1_output =η×P 1_input P 1_input =P 2_max_output +P 3_output Among them, P 1_need is the load power requirement, P 1_output is the output power of the load measured by the dynamometer, η is the conversion efficiency, P 1_input is the input power of the load, P 2_output is the output power of the fuel cell, P 3_output is the output power of the DC power supply; S6: The central processing unit obtains the operating parameters of the fuel cell measured by the parameter measurement module and performs data analysis on the parameters; S7: The central processing unit adjusts the required power of the load according to the control command of the user, and repeats step S3 until the test of the fuel cell performance is stopped.

2. A fuel cell performance testing method according to claim 1, characterized in that: The load controller (11), the fuel cell controller (21), the DC controller (31) and the dynamometer (5) are connected to the central processing unit (6) via wireless communication.

3. A fuel cell performance testing method according to claim 1, characterized in that: The fuel cell (22) comprises a fuel cell stack, a fuel cell reactant supply device and a DCDC booster; the fuel cell stack is respectively connected to a fuel cell controller (21), the fuel cell reactant supply device and the DCDC booster; the fuel cell reactant supply device is connected to the fuel cell controller (21); the DCDC booster is connected in parallel with a DC power supply (32) and then connected to a load controller (11).

4. A fuel cell performance testing method according to claim 1, characterized in that: The DC power supply (32) is an energy storage battery.

5. A fuel cell performance testing method according to claim 1, characterized in that: The testing device further comprises a power supply module, which is respectively connected to the load controller (11), the fuel cell controller (21), the DC controller (31) and the dynamometer (5) and is used to provide working power to the load controller (11), the fuel cell controller (21), the DC controller (31) and the dynamometer (5).

6. A fuel cell performance testing method according to claim 5, characterized in that: The power supply module is an AC power supply.

7. A fuel cell performance testing method according to claim 1, characterized in that: The testing device also includes a frame, and the load module, the fuel cell module, the DC power supply module and the dynamometer (5) are all arranged on the frame.

8. A fuel cell performance testing method according to claim 1, characterized in that: The test device also includes an input module, which is connected to the central processor (6) and is used to input control commands of the load controller (11), the fuel cell controller (21) and the DC controller (31).

9. A fuel cell performance testing method according to claim 1, characterized in that: The testing device also includes a display module, which is connected to the central processor (6) and is used to display the operating parameters of the fuel cell (22) measured by the parameter measurement module (4).

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