Test device and test system for fuel cell stack

Abstract

The embodiment of the invention relates to test equipment and a test system for a fuel cell stack. The test apparatus includes an air supply control module and a back pressure control module detachably disposed in the main body. The gas supply control module comprises a mass flow controller for controlling the flow of dry gas; the mixing pipe is coupled to the mass flow controller and is suitable for receiving the steam and the dry gas, and the dry gas and the steam are mixed into humidified gas in the mixing pipe; and the first gas heat exchanger is coupled to the mixing pipe and is suitable for being coupled to the fuel cell stack, and the first gas heat exchanger is configured to provide the humidified gas subjected to temperature regulation for the fuel cell stack. The backpressure control module is adapted to be coupled to the fuel cell stack and configured to regulate the pressure of the exhaust gas from the fuel cell stack. In this way, related parts are arranged in a centralized mode through the modular design, the total volume of the air cavity of the air supply loop is closer to the total volume of the air cavity of the motor vehicle level, and therefore the testing performance is improved.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate to the field of fuel cells, and more particularly, to a test device, an electronic device, and a computer-readable storage medium for maintaining assets in a factory. Background Art

[0002] In the field of proton exchange membrane fuel cells (PEMFC), the fuel cell system that powers fuel cell vehicles is usually composed of a fuel cell stack and multiple fuel cell auxiliary components. The fuel cell stack is a power generation device that uses the electrochemical reaction of hydrogen and oxygen, and different proton exchange membranes need to be in different humidity to achieve the highest power generation efficiency and the longest service life.

[0003] Since the fuel cell stack is an important component of the fuel cell product, its performance directly affects the final performance of the fuel cell system. Therefore, special testing equipment is required in the R&D and production stages to test the performance of the fuel cell stack. This type of equipment used for fuel cell stack testing is usually called a fuel cell stack test equipment, also known as a stack test bench.

[0004] The stack test bench simulates different operating conditions and tests the performance of fuel cell products by controlling the flow, pressure, temperature and humidity of hydrogen, air or other gases entering the fuel cell product. When the fuel cell stack is working, the hydrogen and oxygen entering the stack need to be humidified. Common humidification methods include humidification tank humidification (bubbling, spraying) and steam humidification. Summary of the invention

[0005] An embodiment of the present disclosure provides a solution for a modular testing device for a fuel cell stack.

[0006] The first aspect of the present disclosure relates to a test device for a fuel cell stack. The test device includes: a main body, suitable for accommodating a fuel cell stack to be tested; a gas supply control module, which is detachably arranged in the main body and includes: a mass flow controller, configured to control the flow of a received dry gas, wherein the dry gas includes hydrogen or air, or includes hydrogen or oxygen; a mixing tube, coupled to the mass flow controller and suitable for receiving steam, wherein the dry gas from the mass flow controller and the received steam are mixed into a humidified gas in the mixing tube; and a first gas heat exchanger, coupled to the mixing tube and suitable for being coupled to the fuel cell stack, wherein the first gas heat exchanger is configured to provide a temperature-regulated humidified gas to the fuel cell stack; and a back pressure control module, which is detachably arranged in the main body and suitable for being coupled to the fuel cell stack, and the back pressure control module is configured to adjust the pressure and temperature of the exhaust gas from the fuel cell stack.

[0007] According to an embodiment of the present disclosure, by constructing the components for controlling the air supply and the components for controlling the exhaust gas as replaceable modules respectively, the related components are arranged centrally, thereby reducing the length of the pipelines between the various components. At the same time, the compactly arranged modules can be flexibly arranged in the test equipment, so that the modules can be closer to the battery stack to be tested, thereby further reducing the total volume of the air cavity of the air supply circuit, making it closer to the total volume of the air cavity of the battery stack in the actual application scenario, thereby improving the test performance. In addition, the modular design enables the test equipment to be used in scenarios with different test powers, thereby improving the applicability of the test equipment.

[0008] In some embodiments, the gas supply control module further comprises: a proportional valve coupled to the mixing tube and configured to adjust the quality of the steam entering the mixing tube. In such an embodiment, by providing the proportional valve on the mixing tube, the quality of the steam entering the mixing tube can be adjusted to match the dry gas.

[0009] In some embodiments, the gas supply control module further comprises: a second gas heat exchanger coupled between the mixing tube and the mass flow controller and configured to preheat the dry gas flowing from the mass flow controller to the mixing tube. In such an embodiment, by providing preheating, the dry gas can be preheated before entering the mixing tube, thereby avoiding condensation when encountering steam.

[0010] In some embodiments, the first gas heat exchanger extends in parallel with the second gas heat exchanger, and the mixing tube extends from the first gas heat exchanger to the second gas heat exchanger in a direction perpendicular to the first gas heat exchanger. In such embodiments, the length of the mixing tube can be minimized by extending the two gas heat exchangers in parallel and extending the mixing tube perpendicular to both.

[0011] In some embodiments, the mixing tube includes a tube body extending between the first gas heat exchanger and the second gas heat exchanger and a steam pipe communicating with the tube body and extending in a direction perpendicular to the tube body. In such an embodiment, by extending the steam pipe perpendicular to the tube body, the space of the module can be fully utilized.

[0012] In some embodiments, the first gas heat exchanger includes a first surface extending in a first direction and the second gas heat exchanger includes a third surface parallel to the first surface, a wet gas inlet is provided on the first surface and a dry gas outlet is provided on the third surface, the wet gas inlet is aligned with the dry gas outlet, and the mixing tube extends from the wet gas inlet to the dry gas outlet. In such an embodiment, by providing the aligned gas inlets and outlets, the mixing tube can be extended in a straight line in a direction perpendicular to the gas heat exchanger, thereby minimizing the length of the mixing tube.

[0013] In some embodiments, the second gas heat exchanger further comprises a fourth surface perpendicular to the third surface, and a dry gas inlet adapted to be coupled to the mass flow controller is provided on the fourth surface. In such an embodiment, by providing the dry gas inlet on the fourth surface, the gas heat exchanger and the mass flow controller can be extended in different directions, thereby reducing the length of the module in one direction, making the module more compact.

[0014] In some embodiments, the first gas heat exchanger further includes a second surface perpendicular to the first surface, and a wet gas outlet suitable for being coupled to a fuel cell stack is formed on the second surface.

[0015] In some embodiments, the gas supply control module further comprises: a fourth gas heat exchanger coupled to the inlet of the mass flow controller and configured to preheat the dry gas entering the mass flow controller. In such an embodiment, by providing a gas heat exchanger at the inlet of the mass flow controller, the dry gas can also be preheated to avoid condensation in the mixing tube.

[0016] In some embodiments, the back pressure control module includes: a back pressure valve configured to adjust the pressure of the exhaust gas; and a third gas heat exchanger configured to adjust the temperature of the exhaust gas. In such an embodiment, the back pressure valve and the gas heat exchanger can be used to adjust the temperature and pressure of the exhaust gas.

[0017] In some embodiments, the third gas heat exchanger is suitable for being coupled to the fuel cell stack, and one end of the back pressure valve is coupled to the third gas heat exchanger, and the other end of the back pressure valve is suitable for being coupled to the exhaust gas treatment device, or one end of the back pressure valve is suitable for being coupled to the fuel cell stack, and the other end of the back pressure valve is coupled to the third gas heat exchanger, and the third gas heat exchanger is suitable for being coupled to the exhaust gas treatment device. In such an embodiment, the positions of the back pressure valve and the gas heat exchanger can be reversed, which improves flexibility.

[0018] In some embodiments, the test device further comprises an additional air supply control module and an additional back pressure control module for other test powers, wherein the additional back pressure control module and the additional air supply control module are adapted to be arranged in the main body to replace the air supply control module and the back pressure control module. In such an embodiment, by arranging modules for different test powers, the flexibility of the test is improved.

[0019] A second aspect of the present disclosure relates to a test system for a fuel cell stack. The test system comprises: a test device for a fuel cell stack according to claim 1; and a fuel cell stack comprising: an input end coupled to a gas supply control module in the test device; and an output end coupled to a back pressure control module in the test device.

[0020] In some embodiments, the test system further includes: a steam source disposed outside the test device or inside the test device and configured to provide steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the embodiments of the present disclosure will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, various embodiments of the present disclosure will be described in an exemplary and non-limiting manner, in which:

[0022] Figure 1 A schematic diagram of a test system according to an embodiment of the present disclosure is shown;

[0023] Figure 2 A schematic block diagram of a test system according to an embodiment of the present disclosure is shown;

[0024] Figure 3 A schematic diagram of a gas circuit of a test system according to an embodiment of the present disclosure is shown;

[0025] Figure 4 A schematic diagram showing an air supply control module according to an embodiment of the present disclosure; and

[0026] Figure 5 A schematic diagram of a testing device according to an embodiment of the present disclosure is shown.

[0027] It should be appreciated that similar or like reference numbers may be used in the figures where practical and may indicate similar or like functionality. DETAILED DESCRIPTION

[0028] The principles of the present disclosure will now be described with reference to the various exemplary embodiments shown in the accompanying drawings. It should be understood that the description of these embodiments is only to enable those skilled in the art to better understand and further implement the present disclosure, and is not intended to limit the scope of the present disclosure in any way. Those skilled in the art will readily recognize from the following description that alternative embodiments of the structures and test equipment described herein may be adopted without departing from the principles of the present disclosure described herein.

[0029] As discussed above, the stack test bench can usually only test fuel cells of a specific power, and the components in the stack test bench are fixedly deployed in the stack test bench. In the pipelines arranged in this way, the pipeline routing is usually not compact enough. Especially in the use of bubbling and spraying humidification schemes, since the humidification equipment is arranged in the gas supply circuit, the total volume of the pipeline of the gas supply circuit is increased, especially much larger than the pipeline volume in the actual fuel cell system. As a result, the real application scenario of the stack in the fuel cell system cannot be simulated on the stack test bench, especially the dynamic performance of the stack cannot be simulated, that is, rapid pressure building and loading cannot be achieved. In particular, if the load is pulled at low flow, a voltage drop will occur and cause reverse polarity. In severe cases, the stack will burn out. Therefore, this type of stack test bench has safety hazards. At the same time, due to the fixed deployment of components, the test equipment is limited to the test of a single power, resulting in reduced applicability.

[0030] In view of this, according to an embodiment of the present disclosure, a solution is proposed to modularize the components associated with the total volume of the pipeline in the air supply circuit. In this solution, the modularization of the components allows the related components to be arranged centrally, reducing the length of the pipeline between the various components. At the same time, the compactly arranged modules can be flexibly arranged in the test equipment, so that the modules can be closer to the battery stack to be tested, thereby further reducing the total volume of the air cavity of the air supply circuit, making it closer to the total volume of the air cavity of the battery stack in the actual application scenario, thereby improving the test performance. In addition, the modular design enables the test equipment to be used in scenarios with different test powers, thereby improving the applicability of the test equipment.

[0031] The following will be combined Figures 1 to 5 A test system for a fuel cell stack according to an embodiment of the present disclosure will be described in detail.

[0032] Figure 1 FIG. 1 is a schematic diagram of a test system according to an embodiment of the present disclosure. Figure 1 As shown, the test system for a fuel cell stack includes a test chamber 10 for a fuel cell stack, a medium supply chamber 20 arranged side by side with the test chamber 10, and a fuel cell stack 30 to be tested placed in the test chamber 10. Figure 1In the illustrated embodiment, the medium supply bin 20 is integrated with the test bin 10. Here, the test bin 10 may be referred to as a test bin, and the medium supply bin 20 may be referred to as a pipeline bin. The medium supply bin 20 may be coupled to a medium source of the factory (such as a hydrogen source for stack testing, an air source, a steam source for providing humidified steam, a coolant source for providing a cooling function, and other process gas sources), and supplies the medium to the test bin 10. For example, the medium supply bin 20 may include a plurality of pipes for conveying different media, and when the medium supply bin 20 is assembled with the test bin 10, the plurality of pipes may extend into the test bin 10 to connect with components in the test bin 10 and supply the medium to the components in the test bin 10.

[0033] like Figure 1 As shown, the test chamber 10 includes a main body 100, gas supply control modules 200-1, 200-2 (collectively referred to as gas supply control modules 200) and back pressure control modules 300-1, 300-2 (collectively referred to as back pressure control modules 300) detachably disposed in the main body 100. During the stack test, the gas supply control module 200 may be coupled to the corresponding pipeline of the medium supply chamber 20 to receive dry gas and steam. In an embodiment of the present disclosure, the dry gas may include hydrogen or air, or may include hydrogen or oxygen. For example, the gas supply control module 200-1 may receive dry hydrogen and steam from the medium supply chamber 20 and provide humidified hydrogen to the cathode of the fuel cell stack 30. Accordingly, the gas control module 200-2 may receive dry oxygen or air and steam from the medium supply chamber 20 and provide oxygen or air to the anode of the fuel cell stack 30. The specific structure of the gas supply control module 200 will be described later in conjunction with Figure 4 Introduce in detail.

[0034] The back pressure control module 300-1 of the test chamber 10 is disposed on the cathode side of the fuel cell stack 30, and the back pressure control module 300-2 of the test chamber 10 is disposed on the anode side of the fuel cell stack 30. During the stack test, the back pressure control module 300-1 is coupled to the fuel cell stack 30 to receive the cathode tail gas, and the back pressure control module 300-2 is coupled to the fuel cell stack 30 to receive the anode tail gas.

[0035] exist Figure 1 In the embodiment shown, the components in the gas supply circuit associated with the total volume of the test pipeline are modularized into a gas supply control module and a back pressure control module, respectively, so that the gas supply circuit is constructed very compactly, reducing the pipeline volume between the various components, making it closer to the total volume of the gas cavity of the fuel cell in the actual use scenario, thereby providing better test results. At the same time, the compact structure can reduce the overall volume of the test equipment.

[0036] Figure 2FIG. 1 shows a schematic block diagram of a test system according to an embodiment of the present disclosure. Figure 2 As shown, the test system for a fuel cell stack includes a test chamber 10 for a fuel cell stack, a medium supply chamber 20, and a fuel cell stack 30 to be tested. Figure 2 In the illustrated embodiment, the medium supply chamber 20 can serve as a medium source of multiple media to provide the required media to the test chamber 10. In this embodiment, the medium supply chamber 20 can provide hydrogen, air, steam, cooling water, nitrogen, and the like.

[0037] like Figure 2 As shown, the test chamber 10 includes a hydrogen supply circuit and an air supply circuit. The hydrogen supply circuit includes a supply control module 200-1 and a back pressure control module 300-1. In contrast, the air supply circuit includes a supply control module 200-2 and a back pressure control module 300-2.

[0038] Gas supply control modules 200-1, 200-2 and back pressure control modules 300-1, 300-2. In this embodiment, the gas supply control module 200-1 is arranged on the cathode side of the fuel cell stack 30. The gas supply control module 200-1 includes a mass flow controller 210-1. The mass flow controller (Mass Flow Controller, MFC) can be used to accurately measure and control the mass flow of gas or liquid, and is usually composed of components such as a circuit board, a sensor, an inlet and outlet gas pipeline joint, a diverter pipeline, a housing, and a regulating valve. The mass flow controller 210-1 can be coupled to the dry gas pipeline 26-1 of the medium supply bin 20 for supplying dry hydrogen, and the mass flow rate of the received hydrogen can be controlled so that the hydrogen supplied to the fuel cell stack 30 is adapted to the test power for the fuel cell stack 30. The gas supply control module 200-1 is also coupled to the medium supply bin 20 via a process pipeline 28-1 for supplying nitrogen.

[0039] The gas supply control module 200-1 also includes a mixing tube 220-1. The mixing tube 220-1 may include three nozzles, for example. The first nozzle of the three nozzles may be coupled to the mass flow controller 210-1 to receive dry hydrogen from the mass flow controller 210-1. The second nozzle of the three nozzles may be coupled to the steam pipe 25-1 for supplying steam of the medium supply bin 20 to receive steam. In addition, a valve 240-1 for adjusting the quality of the steam entering the mixing tube 220-1 may also be provided at the second nozzle. When the dry hydrogen from the mass flow controller 210-1 meets the steam in the mixing tube 220-1, it is mixed into a humidified gas. The third nozzle of the three nozzles is coupled to the gas heat exchanger 230-1 of the gas supply control module 200-1, and the humidified gas is delivered to the gas heat exchanger 230-1. The gas heat exchanger 230-1 is used to heat the humidified gas to a predetermined temperature to meet the test requirements. The gas heat exchanger 230 - 1 of the gas supply control module 200 - 1 is coupled to the cathode of the fuel cell stack 30 , and provides the heated humidified gas to the cathode.

[0040] The air cavity volume of the gas supply circuit associated with the test usually refers to the gas volume from the mass flow controller to the last component in the back pressure module. In the conventional battery stack test bench using bubbling or spraying humidification, a humidification tank is usually provided downstream of the mass flow controller. In this case, the total volume of the two-way air cavity of the anode and cathode of the battery stack test bench is mainly composed of the pipeline volume from the mass flow controller to the humidification tank, the humidification tank volume, the pipeline volume from the humidification tank to the gas heat exchanger, the gas heat exchanger volume, the pipeline volume from the gas heat exchanger to the battery stack, the battery stack volume, and the pipeline volume from the battery stack to the back pressure valve. In this conventional setting, the setting of the humidification tank greatly increases the air cavity volume. In contrast, in the scheme of the present disclosure, the humidification tank volume in the total air cavity volume is completely eliminated by replacing the humidification tank humidification scheme with a steam-based humidification scheme. In this way, by mixing the dry gas with the steam using a mixing tube, the dry gas is humidified without the need for other humidification devices, thereby reducing the total volume of the gas cavity and improving the stability of the test.

[0041] Accordingly, the gas supply control module 200-2 can be arranged on the anode side of the fuel cell stack 30. The gas supply control module 200-2 includes a mass flow controller 210-2, a mixing tube 220-2, a valve 240-2 and a gas heat exchanger 230-1. The gas supply control module 200-2 is coupled to a dry air pipeline 26-2 for supplying dry air, a process gas pipeline 28-2 for supplying nitrogen, and a steam pipeline 25-2 for supplying steam. The gas supply control module 200-2 can provide oxygen or air to the anode of the fuel cell stack 30. The structure and operating principle of the gas supply control module 200-2 are the same as those of the gas supply control module 200-1, and will not be repeated here. It should be understood that although the modules for the cathode and the anode are shown to have similar structures, due to the different gas supply parameters at the cathode and the anode, the modules for the cathode and the anode are constructed to be suitable for the corresponding gas supply parameters and have different components.

[0042] In addition, the fuel cell stack 30 is coupled to the medium supply device 20 via a cooling pipe 27-1 for receiving cooling water (e.g., deionized water) on the cathode side, and is coupled to the medium supply device 20 via a cooling pipe 27-2 for receiving cooling water on the anode side. After the humidified air reacts with hydrogen in the fuel cell stack 30, the cathode tail gas generated at the cathode enters the back pressure control module 300-1. The back pressure control module 300-1 adjusts the pressure and temperature of the cathode tail gas so that it is discharged through the tail gas pipe 27-1. Similarly, the anode tail gas generated at the anode enters the back pressure control module 300-2. The back pressure control module 300-2 adjusts the pressure and temperature of the anode tail gas so that it is discharged through the tail gas pipe 27-2.

[0043] Figure 3 1 shows a schematic diagram of the gas supply circuit of the test device according to an embodiment of the present disclosure. Figure 2 As discussed, the structure and operation principle of the hydrogen supply circuit and the air supply circuit of the test device are the same, and for the purpose of brevity and without loss of generality, only one supply circuit is described in detail. The supply circuit can correspond to the hydrogen supply circuit or the air / oxygen supply circuit.

[0044] like Figure 3 As shown, the test system for a fuel cell stack includes a test chamber 10 for a fuel cell stack, a medium supply chamber 20, and a fuel cell stack 30 to be tested. Here, the medium supply chamber 20 includes another main body 21. A steam source 22, a dry gas source 23 (such as an air source, a hydrogen source), and an exhaust gas treatment device 24 are provided in the other main body 21. The steam source 22 can be, for example, an ultrapure water steam boiler. For example, the ultrapure water steam boiler can generate high-temperature steam above 100°C when it is working.

[0045] The test chamber 10 includes a main body 100 and a gas supply control module 200 and a back pressure control module 300 disposed in the main body 100. The gas supply control module 200 includes a mass flow controller 210, a mixing tube 220, a proportional valve 240, and a gas heat exchanger 230. Figure 3 In the illustrated embodiment, the mass flow controller 210 is implemented as a component consisting of a valve and a flow meter. The mass flow controller 210 is coupled to the dry gas source 23 of the medium supply tank 20 for supplying dry gas via the dry gas pipeline 26, and can control the mass flow of the received hydrogen gas.

[0046] The gas supply control module 200 also includes a mixing tube 220. A proportional valve 240 is provided at the first end of the mixing tube 220. The proportional valve 240 is coupled to the steam source 22 for supplying steam of the medium supply bin 20 via a steam pipe 25. The proportional valve 240 can be implemented as a solenoid valve, for example, and controls the amount of steam sprayed into the dry gas so that the steam reaches the target dew point after mixing with the dry gas. In some embodiments, the proportional valve 240 can perform feedback regulation by installing a humidity sensor in front of the stack inlet, or by installing a steam flow meter between the proportional valve and the steam source. In some embodiments, the proportional valve 240 may include a plurality of proportional valves. In some embodiments, the plurality of proportional valves are connected in parallel. By providing a plurality of proportional valves, the range of steam regulation can be increased, so that the gas supply module is suitable for more test scenarios.

[0047] The second end of the mixing tube 220 is coupled to the mass flow controller 210, and receives dry gas from the mass flow controller 210. The dry gas from the mass flow controller 210 meets the steam in the mixing tube 220 to form a humidified gas. Here, the dry gas may be a high-pressure gas. For example, when the dry gas is air and hydrogen, both the air and the hydrogen are high-pressure gases. In the case of hydrogen, the hydrogen is mixed with high-temperature steam in the mixing tube 220 to produce high-temperature supersaturated hydrogen. Similarly, in the case of air, the air is mixed with high-temperature steam in the mixing tube 220 to produce high-temperature supersaturated air. The diameter of the mixing tube 220 matches the power of the actual test. When laying out the internal components, the length of the mixing tube can be kept as short as possible, and the pipeline volume can be minimized while meeting the functions.

[0048] The third end of the mixing tube 220 is coupled to the gas heat exchanger 230 of the gas supply control module 200 via the gas supply pipeline 110, and the high-temperature supersaturated gas is delivered to the gas heat exchanger 230. The gas heat exchanger 230 is used to heat the humidified gas to a predetermined temperature to meet the dew point temperature, pressure, and temperature required for the test. Afterwards, the gas heat exchanger 230 is coupled to the fuel cell stack 30 and provides the temperature-adjusted humidified gas to the fuel cell stack 30.

[0049] After the gas reacts in the fuel cell stack 30, the generated exhaust gas enters the back pressure control module 300 coupled to the fuel cell stack 30 via the exhaust gas pipeline 120. Figure 3 In the illustrated embodiment, the back pressure control module 300 includes a back pressure valve 310 for adjusting the pressure of the exhaust gas and a gas heat exchanger 320 for adjusting the temperature of the exhaust gas. The back pressure valve 310 is coupled to the exhaust gas pipeline 120. One end of the gas heat exchanger 320 is coupled to the back pressure valve 310, and the other end is coupled to the exhaust gas treatment device 24 of the medium supply bin 20 via the exhaust gas pipeline 27. In some embodiments, the gas supply pipeline 110 or the exhaust gas pipeline 120 can be a soft or hard pipe, or a gas flow channel processed by a machined part. In some embodiments, temperature, pressure, humidity sensors, etc. can be set at the inlet of the stack or at the outlet of the stack.

[0050] In some embodiments, the gas heat exchanger 320 of the back pressure control module 300 can be coupled to the exhaust gas pipeline 120, and one end of the back pressure valve 310 is coupled to the gas heat exchanger 320, and the other end is coupled to the exhaust gas treatment device 24 of the medium supply tank 20 via the exhaust gas pipeline 27.

[0051] In some embodiments, the test chamber 10 also includes additional air supply control modules and additional back pressure control modules for other test powers. Here, additional back pressure control modules and additional air supply control modules can be arranged in the main body to replace the current air supply control module 200 and the back pressure control module 300. For example, the current air supply control module and the back pressure control module can be used for testing a test power of 10kW, while additional air supply control modules and back pressure control modules can be used for testing a test power of 300kW. Thus, the applicability of the test equipment is greatly expanded. It should be understood that in the context of the present disclosure, the term "detachable" means that the module can be removed from the main body by a non-destructive disassembly method. At the same time, the term "replaceable" means that different modules can be connected to the corresponding interfaces on the main body without modification.

[0052] Figure 4 FIG. 2 shows a schematic diagram of an air supply control module 200 according to an embodiment of the present disclosure. Figure 4 As shown, the gas supply control module 200 includes a mass flow controller 210 for receiving dry gas. Figure 4 In the illustrated embodiment, the mass flow controller 210 is implemented as a plurality of mass flow controllers arranged in parallel in the Y direction indicated by the arrow 52. The mass flow controller 210 extends, for example, in the X direction indicated by the arrow 51, and one end thereof in the X direction includes a first dry gas inlet 211 for receiving dry gas. The other end in the X direction away from the first dry gas inlet 211 includes a first dry gas outlet 212.

[0053] and Figure 2 and Figure 3 The difference is, Figure 4 The gas supply control module 200 shown may include two gas heat exchangers, namely a first gas heat exchanger 230 and a second gas heat exchanger 250. The second gas heat exchanger 250 is coupled between the mixing tube 220 and the mass flow controller 210, and is configured to preheat the dry gas flowing from the mass flow controller 210 to the mixing tube 220. The first gas heat exchanger 230 and the second gas heat exchanger 250 may be identical and have a body in the form of a rectangular parallelepiped. The first gas heat exchanger 230 and the second gas heat exchanger 250 extend parallel to the Z direction indicated by the arrow 53. The first gas heat exchanger 230 includes a first surface 231 extending in the Z direction and the second gas heat exchanger 250 includes a third surface 251 parallel to the first surface 231. A wet gas inlet 232 is provided on the first surface 231 and a second dry gas outlet 252 is provided on the third surface 251. The wet gas inlet 232 is aligned with the second dry gas outlet 252.

[0054] like Figure 4 As shown, the rectangular body of the second gas heat exchanger 250 also includes a fourth surface 253 perpendicular to the third surface 251. A second dry gas inlet 254 is provided on the fourth surface 253. The second dry gas inlet 254 is coupled to the first dry gas outlet 212 of the mass flow controller 210. The first gas heat exchanger 230 also includes a second surface 233 perpendicular to the first surface 231. The second surface 233 is on the side of the first gas heat exchanger 230 away from the mass flow controller 210. A wet gas outlet 234 is provided on the second surface 233. The wet gas outlet 234 is coupled to the fuel cell stack 30 in the stack test device.

[0055] The mixing pipe 220 of the air supply control module 200 includes a pipe body 221 extending from the wet gas inlet 232 to the second dry gas outlet 252 and a steam pipe 222 communicating with the pipe body 221 and extending in the X direction. A proportional valve 240 is disposed on the steam pipe 222 .

[0056] During the stack test, the dry gas enters the mass flow controller 210 from the first dry gas inlet 211 in the direction indicated by the arrow 41, and the flow-adjusted dry gas enters the second gas heat exchanger 250 via the connection between the first dry gas outlet 212 and the second dry gas inlet 254. The dry gas is preheated in the second gas heat exchanger 250 to prevent condensation when the dry gas meets the steam. After that, the preheated dry gas enters the pipe body 221 of the mixing tube 220 via the second dry gas outlet 252. At the same time, the steam enters the steam pipe 222 from the inlet of the steam pipe 222 in the direction indicated by the arrow 42. After being adjusted by the proportional valve 240, the steam also enters the pipe body 221 and mixes with the dry gas to form a humidified gas. Then, the humidified gas enters the first gas heat exchanger 230 from the mixing tube 220 via the wet gas inlet 232. After being heated in the first gas heat exchanger 230, the humidified gas enters the fuel cell stack from the wet gas outlet in the direction indicated by arrow 43. In some embodiments, the second gas heat exchanger 250 may also be installed at the first dry gas inlet 211, so that the gas entering the mass flow controller 210 is preheated first.

[0057] exist Figure 4 In the illustrated embodiment, the gas supply control module is made compact by arranging the two gas heat exchangers to extend in parallel and perpendicular to the mass flow controller, thereby reducing the length of the mixing tube connecting the two gas heat exchangers, and at the same time making the steam inlet located above the mass flow controller, improving the space utilization, and reducing the total volume as a whole. In some exemplary embodiments, compared with the scheme using a humidifying tank, the total volume of the air cavity for the cathode can be reduced from 150L to about 15L, and the total volume of the air cavity for the anode can be reduced from 70L to about 5L, making it close to the air cavity volume of the fuel cell in the actual use scenario, that is, the air cavity volume of the engine level, thereby significantly improving the test capability. It should be understood that the specific structure of the components in the test chamber described in this embodiment and the corresponding size and volume are only exemplary. All components that can realize the corresponding functions are within the scope of the present disclosure.

[0058] Figure 5 FIG. 1 shows a schematic diagram of a test chamber 10 according to an embodiment of the present disclosure. Figure 5 As shown, the test chamber 10 includes a main body 100. The main body 100 can accommodate the fuel cell stack to be tested and other components. The test chamber 10 includes a gas supply control module 200 and a back pressure control module 300 detachably arranged in the main body 100. The gas supply control module 200 can receive the corresponding medium from the medium supply device, humidify the medium and control its flow rate and temperature. The back pressure control module 300 can be coupled to the fuel cell stack, and the back pressure control module is configured to adjust the pressure and temperature of the exhaust gas from the fuel cell stack so that it is suitable for being discharged.

[0059] The gas supply control module 200 includes a mass flow controller 210 suitable for receiving dry gas. The dry gas may include hydrogen or air, or hydrogen or oxygen, and the mass flow controller 210 may be used to provide hydrogen to the cathode, or may be used to provide hydrogen to the anode. The gas supply control module 200 also includes a mixing tube 220. The first end of the mixing tube 220 is coupled to the mass flow controller 210. The second end of the mixing tube 220 may receive steam. The dry gas from the mass flow controller 210 and the received steam are mixed into a humidified gas in the mixing tube 220. The gas supply control module 200 also includes a first gas heat exchanger 230. The first gas heat exchanger 230 is coupled to the mixing tube 220 and is suitable for being coupled to the fuel cell stack 30. The first gas heat exchanger 230 is configured to provide the fuel cell stack 30 with a temperature-regulated humidified gas.

[0060] As used herein, the term "including" and its variations will be interpreted as open-ended terms meaning "including but not limited to". The term "based on" will be interpreted as "based at least in part". The terms "one embodiment" and "embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". The terms "first", "second", etc. may refer to different or identical objects. Other explicit and implicit definitions may be included below. Unless the context clearly indicates otherwise, the definitions of terms are consistent throughout the specification.

[0061] Although the subject matter has been described in language specific to structural features and / or test device logic actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A test device (1) for a fuel cell stack (30), comprising: A main body (100) adapted to accommodate a fuel cell stack (30) to be tested; The air supply control module (200) is detachably arranged in the main body (100) and comprises: a mass flow controller (210) configured to control a flow rate of a received dry gas, wherein the dry gas comprises hydrogen or air, or comprises hydrogen or oxygen; a mixing tube (220) coupled to the mass flow controller (210) and adapted to receive steam, wherein the dry gas from the mass flow controller (210) and the received steam are mixed into a humidified gas in the mixing tube (220); and a first gas heat exchanger (230) coupled to the mixing tube (220) and adapted to be coupled to the fuel cell stack (30), wherein the first gas heat exchanger (230) is configured to provide the temperature-regulated humidified gas to the fuel cell stack (30); and A back pressure control module (300) is detachably arranged in the main body (100) and is suitable for being coupled to the fuel cell stack (30). The back pressure control module (300) is configured to adjust the pressure of the exhaust gas from the fuel cell stack (30).

2. The test device (1) according to claim 1, wherein the gas supply control module (200) further comprises: A proportional valve (240) is coupled to the mixing tube (220) and is configured to adjust the quality of steam entering the mixing tube (220).

3. The test device (1) according to claim 1, wherein the gas supply control module (200) further comprises: A second gas heat exchanger (250) is coupled between the mixing tube (220) and the mass flow controller (210), and is configured to preheat the dry gas flowing from the mass flow controller (210) to the mixing tube (220).

4. The test device (1) according to claim 3, wherein the first gas heat exchanger (230) extends in parallel with the second gas heat exchanger (250), and the mixing tube (220) extends from the first gas heat exchanger (230) to the second gas heat exchanger (250) in a direction perpendicular to the first gas heat exchanger (230).

5. The test device (1) according to claim 4, wherein the mixing tube (220) includes a tube body (221) extending between the first gas heat exchanger (230) and the second gas heat exchanger (250), and a steam pipe (222) connected to the tube body (221) and extending in a direction perpendicular to the tube body (221).

6. The test device (1) according to claim 4, wherein the first gas heat exchanger (230) includes a first surface (231) extending in a first direction and the second gas heat exchanger (250) includes a third surface (251) parallel to the first surface (231), a wet gas inlet (232) is provided on the first surface (231) and a dry gas outlet (252) is provided on the third surface (251), the wet gas inlet (232) is aligned with the dry gas outlet (252), and the mixing tube (220) extends from the wet gas inlet (232) to the dry gas outlet (252).

7. The test device (1) according to claim 6, wherein the second gas heat exchanger (250) further includes a fourth surface (253) perpendicular to the third surface (251), and a dry gas inlet (254) suitable for being coupled to the mass flow controller (210) is provided on the fourth surface (253).

8. The test device (1) according to claim 6, wherein the first gas heat exchanger (230) further includes a second surface (233) perpendicular to the first surface (231), and a moisture outlet (234) suitable for being coupled to the fuel cell stack (30) is provided on the second surface (233).

9. The test device (1) according to claim 1, wherein the gas supply control module (200) further comprises: A fourth gas heat exchanger is coupled to the inlet of the mass flow controller (210) and is configured to preheat the dry gas entering the mass flow controller (210).

10. The test device (1) according to claim 1, wherein the back pressure control module (300) comprises: A back pressure valve (310) configured to adjust the pressure of the exhaust gas; as well as The third gas heat exchanger (320) is configured to adjust the temperature of the exhaust gas.

11. The test device (1) according to claim 10, wherein the third gas heat exchanger (320) is coupled to the fuel cell stack (30), and one end of the back pressure valve (310) is coupled to the third gas heat exchanger (320), and the other end of the back pressure valve (310) is suitable for being coupled to an exhaust gas treatment device, or One end of the back pressure valve (310) is coupled to the fuel cell stack (30), and the other end of the back pressure valve (310) is coupled to the third gas heat exchanger (320), and the third gas heat exchanger (320) is suitable for being coupled to an exhaust gas treatment device.

12. The test device (1) according to claim 4, further comprising an additional air supply control module and an additional back pressure control module for other test powers, The additional back pressure control module and the additional air supply control module are suitable for being arranged in the main body to replace the air supply control module (200) and the back pressure control module (300).

13. A test system for a fuel cell stack (30), comprising: A test device (1) for a fuel cell stack (30) according to claims 1 to 12; as well as A fuel cell stack (30) comprising: An input end coupled to a gas supply control module (200) in the test device (1); as well as The output end is coupled to the back pressure control module (300) in the test device (1).

14. The test system according to claim 13, further comprising: A steam source is arranged outside the test device (1) or inside the test device (1) and is configured to provide steam.

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