Test mode switching platform, system and method for integrated renewable fuel cell

Abstract

The invention relates to the technical field of integrated renewable fuel cells, in particular to a test mode switching platform, system and method of an integrated renewable fuel cell, the test mode switching platform of the integrated renewable fuel cell comprises a plurality of control pipelines, each control pipeline at least comprises three connecting ports, the three connection ports are used for being connected with interfaces of an electrolyzed water test bench, a fuel cell test bench and a renewable fuel cell respectively, and the interfaces, connected with the electrolyzed water test bench, the fuel cell test bench and the renewable fuel cell, of the control pipelines are different; and a control valve is arranged on the control pipeline and is used for controlling the renewable fuel cell to be communicated with the electrolyzed water test bench or the fuel cell test bench. According to the invention, switching between the electrolyzed water test and the fuel cell test is realized, and continuous switching and uninterrupted operation between the two modes are ensured, so that the target of engineering simulation is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated renewable fuel cells, and particularly to a test mode switching platform, system and method for an integrated renewable fuel cell. Background Art

[0002] In the context of the increasingly prominent problems of wind and solar curtailment today, renewable fuel cells can play an important role. In response to the intermittent and fluctuating characteristics of wind energy and solar energy, renewable fuel cells can utilize excess clean electricity such as wind power and solar energy to produce hydrogen, store the hydrogen, and generate electricity using hydrogen during peak power demand periods, providing a stable power output to the power grid, thereby achieving the goal of "peak shaving and valley filling" in the power dispatching process.

[0003] Among various types of renewable fuel cells, the integrated renewable fuel cell technology integrates an electrolyzer and a fuel cell into the same device, which can significantly improve the energy density of the device and reduce costs. It realizes catalytic reactions in two modes by assembling a bifunctional membrane electrode. However, the fuel cell mode and the electrolysis mode cannot be carried out simultaneously, and a mode switch is required to achieve the transition between the two modes to avoid the reaction environment and by-products in one mode from affecting the normal startup of the other mode.

[0004] Currently, the research on integrated renewable fuel cells is still in the laboratory stage, while the electrolysis hydrogen production technology and fuel cell technology have gradually matured, and there are already mature fuel cell test equipment and electrolysis test equipment on the market. However, the integrated fuel cell involves complex mode switching and water-gas conversion during the test process, and there is currently no commercial test equipment specifically for integrated renewable fuel cells. Therefore, on the basis of not modifying the existing fuel cell test equipment and electrolysis equipment, it is necessary to build a test mode switching platform for integrated renewable fuel cells to ensure the effective connection between the fuel cell test platform and the electrolysis test platform, so as to achieve the continuous operation of the integrated renewable fuel cell between the two modes. This can not only provide convenience for researchers, promote in-depth research on related mechanisms, but also accelerate the industrial application process of integrated renewable fuel cells. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the existing technology and provide a test mode switching platform, system and method for an integrated renewable fuel cell, which realizes the switching between electrolysis tests and fuel cell tests, ensures continuous switching and uninterrupted operation between the two modes, and thus achieves the goal of engineering simulation.

[0006] To solve the above technical problems, in a first aspect, the present invention provides a test mode switching platform for an integrated renewable fuel cell, including a plurality of control pipelines. Each of the control pipelines includes at least three connection ports, which are respectively used to connect to an electrolytic water test bench, a fuel cell test bench, and an interface of the renewable fuel cell. The interfaces of each control pipeline connected to the electrolytic water test bench, the fuel cell test bench, and the renewable fuel cell are different, so that the anode inlet of the electrolytic water test bench, one plate of the renewable fuel cell, and the anode outlet of the electrolytic water test bench are connected; the cathode inlet of the electrolytic water test bench, the other plate of the renewable fuel cell, and the cathode outlet of the electrolytic water test bench are connected; the anode inlet of the fuel cell test bench, one plate of the renewable fuel cell, and the anode outlet of the fuel cell test bench are connected; the cathode inlet of the fuel cell test bench, the other plate of the renewable fuel cell, and the cathode outlet of the fuel cell test bench are connected.

[0007] A control valve is provided on the control pipeline, and the control valve is used to control the connection between the renewable fuel cell and the electrolytic water test bench or the connection between the renewable fuel cell and the fuel cell test bench.

[0008] In some embodiments, the control pipeline includes three pipelines. One ends of the three pipelines are connected through a three-way valve, and the other ends of the three pipelines are respectively three connection ports. Control valves are provided on two of the three pipelines. The two pipelines provided with control valves are respectively used to connect to the electrolytic water test bench and the fuel cell test bench, and the other pipeline is used to connect to the renewable fuel cell.

[0009] In some embodiments, a controller is included, and the controller is used to control the on-off of the control valve, so that the renewable fuel cell is only connected to the electrolytic water test bench or only connected to the fuel cell test bench.

[0010] In some embodiments, a heating element is provided on the control pipeline. The heating element is used to connect to the fuel cell test bench, and the heating element is used to control the temperature of the reactants in the control pipeline.

[0011] In a second aspect, the present invention provides a test system for a test mode switching platform of an integrated renewable fuel cell, including: an electrolytic water test bench, a fuel cell test bench, and a renewable fuel cell. The renewable fuel cell is connected to the electrolytic water test bench and the fuel cell test bench through a plurality of control pipelines.

[0012] In some embodiments, the electrolytic water test bench includes a first anode inlet, a first anode outlet, a first cathode inlet, a first cathode outlet, and a DC power supply.

[0013] The fuel cell test bench includes a second anode inlet, a second anode outlet, a second cathode inlet, a second cathode outlet, and a DC load;

[0014] The renewable fuel cell includes a first plate and a second plate. A first tab, a first inlet, and a first outlet are provided on the first plate, and a second tab, a second inlet, and a second outlet are provided on the second plate. The first tab and the second tab are connected to a DC power supply through a first air switch, and the first tab and the second tab are connected to a DC load through a second air switch;

[0015] A control pipeline, the control pipeline includes a first control pipeline, a second control pipeline, a third control pipeline, and a fourth control pipeline;

[0016] The control pipeline adopts a constant electrode connection method: the first connection port of the first control pipeline is connected to the first anode inlet, the second connection port is connected to the second anode inlet, and the third connection port is connected to the first inlet. The first connection port of the second control pipeline is connected to the first cathode inlet, the second connection port is connected to the second cathode inlet, and the third connection port is connected to the second inlet. The first connection port of the third control pipeline is connected to the first anode outlet, the second connection port is connected to the second anode outlet, and the third connection port is connected to the first outlet. The first connection port of the fourth control pipeline is connected to the first cathode outlet, the second connection port is connected to the second cathode outlet, and the third connection port is connected to the second outlet;

[0017] Or the control pipeline adopts a constant gas connection method: the first connection port of the first control pipeline is connected to the first anode inlet, the second connection port is connected to the second cathode inlet, and the third connection port is connected to the first inlet. The first connection port of the second control pipeline is connected to the first cathode inlet, the second connection port is connected to the second anode inlet, and the third connection port is connected to the second inlet. The first connection port of the third control pipeline is connected to the first anode outlet, the second connection port is connected to the second cathode outlet, and the third connection port is connected to the first outlet. The first connection port of the fourth control pipeline is connected to the first cathode outlet, the second connection port is connected to the second anode outlet, and the third connection port is connected to the second outlet.

[0018] In some embodiments, heating sheets are provided on the first plate and the second plate. The heating sheets are connected to the fuel cell test bench, and the heating sheets are used to control the temperature of the reactants in the renewable fuel cell.

[0019] In a third aspect, the present invention provides a test method, including:

[0020] Testing the fuel cell mode and the water electrolysis mode in a constant electrode manner;

[0021] The tests of the fuel cell mode and the water electrolysis mode are carried out in a constant gas manner.

[0022] Furthermore, the tests of the fuel cell mode and the water electrolysis mode carried out in a constant electrode manner include:

[0023] Connect the control pipeline in a constant electrode connection manner to conduct water electrolysis tests or fuel cell tests;

[0024] When switching from the water electrolysis mode to the fuel cell mode, disconnect the first air switch, control the opening of the corresponding control valve through the controller, so that the renewable fuel cell is only connected to the fuel cell test bench. The fuel cell test bench passes inert gas into the first plate and the second plate through the second anode inlet and the second cathode inlet, and discharges the water and by-products in the renewable fuel cell from the second anode outlet and the second cathode outlet; close the second air switch, the fuel cell test bench passes hydrogen into the first plate through the second anode inlet, and the fuel cell test bench passes oxygen into the second plate through the second cathode inlet, and starts the fuel cell test;

[0025] When switching from the fuel cell mode to the water electrolysis mode, the fuel cell test bench passes inert gas into the first plate and the second plate through the second anode inlet and the second cathode inlet, and discharges the hydrogen and oxygen in the renewable fuel cell from the second anode outlet and the second cathode outlet. Disconnect the second air switch, control the opening of the corresponding control valve through the controller, so that the renewable fuel cell is only connected to the water electrolysis test bench. Close the first air switch, the water electrolysis test bench injects anode water from the first inlet into the first plate through the first anode inlet, and the water electrolysis test bench injects cathode water from the second inlet into the second plate through the first cathode inlet, or the water electrolysis test bench does not inject water into the second plate and closes the ball valve on the first cathode inlet, and starts the water electrolysis test.

[0026] Furthermore, the tests of the fuel cell mode and the water electrolysis mode carried out in a constant gas manner include:

[0027] Connect the control pipeline in a constant gas connection manner to conduct water electrolysis tests or fuel cell tests;

[0028] When switching from the water electrolysis mode to the fuel cell mode, disconnect the first air switch, control the opening of the corresponding control valve through the controller, so that the renewable fuel cell is only connected to the fuel cell test bench; close the second air switch, the fuel cell test bench passes hydrogen into the second plate through the second anode inlet, and the fuel cell test bench passes oxygen into the first plate through the second cathode inlet, and starts the fuel cell test;

[0029] When switching from the fuel cell mode to the water electrolysis mode, disconnect the second air switch, control the corresponding control valve to open through the controller, so that the renewable fuel cell is only connected to the water electrolysis test bench, close the first air switch, and the water electrolysis test bench injects anode water from the first inlet into the first plate through the first anode inlet, and the water electrolysis test bench injects cathode water from the second inlet into the second plate through the first cathode inlet, or the water electrolysis test bench does not inject water into the second plate and closes the ball valve on the first cathode inlet, and starts the water electrolysis test.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. Based on the existing fuel cell test bench and water electrolysis test bench, the present invention connects the water electrolysis test bench, the fuel cell test bench, and the renewable fuel cell by setting multiple control pipelines, and can perform single-cell tests on the integrated renewable fuel cell. By directly controlling the control valves on the control pipelines, the single cell can be continuously switched and operated in the fuel cell mode and the water electrolysis mode respectively, thus achieving the goal of engineering simulation. The whole system is convenient to operate, easy to connect, simple in setting, and cost-saving.

[0032] 2. By setting a controller, the present invention can control multiple control valves at the same time, which is convenient for the rapid switching of pipelines between the water electrolysis test mode and the fuel cell test mode, and realizes the continuous switching and operation between the two modes.

[0033] 3. By setting a heating element and a heating sheet, the present invention realizes the precise control of the battery temperature and the reactant temperature.

[0034] 4. The test mode switching platform of the present invention can realize the switching and operation of the renewable fuel cell under two operating configurations of constant electrode and constant gas by re-matching the control pipelines. Description of the Drawings

[0035] Figure 1 It is a schematic connection structure diagram under the constant electrode operating configuration of the present invention.

[0036] Reference numerals: First control pipeline 1; First three-way valve 11; First water electrolysis control valve 12; First fuel control valve 13; First check valve 14;

[0037] Second control pipeline 2; Second three-way valve 21; Second water electrolysis control valve 22; Second fuel control valve 23; Second check valve 24;

[0038] Third control pipeline 3; Third three-way valve 31; Third water electrolysis control valve 32; Third fuel control valve 33;

[0039] Fourth control pipeline 4; fourth three-way valve 41; fourth electrolyzed water control valve 42; fourth fuel control valve 43;

[0040] Controller 5;

[0041] First electrode plate 6; first tab 61; first inlet 62; first outlet 63;

[0042] Second electrode plate 7; second tab 71; second inlet 72; second outlet 73;

[0043] Electrolyzed water test bench 8; first anode inlet 81; first anode outlet 82; first cathode inlet 83; first cathode outlet 84; DC power supply 85; first air switch 86;

[0044] Fuel cell test bench 9; second anode inlet 91; second anode outlet 92; second cathode inlet 93; second cathode outlet 94; DC load 95; second air switch 96. Detailed implementation manner

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] As Figure 1 shown, the present invention provides a test mode switching platform for an integrated renewable fuel cell and a test system including the test mode switching platform;

[0047] The test system includes:

[0048] An electrolyzed water test bench 8, the electrolyzed water test bench 8 includes a first anode inlet 81, a first anode outlet 82, a first cathode inlet 83, a first cathode outlet 84, and a DC power supply 85;

[0049] A fuel cell test bench 9, the fuel cell test bench 9 includes a second anode inlet 91, a second anode outlet 92, a second cathode inlet 93, a second cathode outlet 94, and a DC load 95;

[0050] The above-mentioned electrolyzed water test bench 8 and fuel cell test bench 9 are both existing structures.

[0051] A renewable fuel cell (i.e., an integrated renewable fuel cell), the renewable fuel cell adopts a single cell, including a first plate 6 and a second plate 7. A membrane electrode is arranged between the first plate 6 and the second plate 7. A first tab 61, a first inlet 62, and a first outlet 63 are arranged on the first plate 6. A second tab 71, a second inlet 72, and a second outlet 73 are arranged on the second plate 7. The first tab 61 and the second tab 71 are connected to a DC power supply 85 through a first air switch 86, and the first tab 61 and the second tab 71 are connected to a DC load 95 through a second air switch 96.

[0052] The test mode switching platform of the integrated renewable fuel cell includes:

[0053] A control pipeline, the control pipeline includes a first control pipeline 1, a second control pipeline 2, a third control pipeline 3, and a fourth control pipeline 4. Each control pipeline includes three pipelines. One ends of the three pipelines are connected through a three-way valve, and the other ends of the three pipelines are respectively three connection ports. The three connection ports are respectively used to connect to an electrolyzed water test bench 8, a fuel cell test bench 9, and an interface of the renewable fuel cell. The interfaces of each control pipeline connected to the electrolyzed water test bench 8, the fuel cell test bench 9, and the renewable fuel cell are different.

[0054] The control pipeline of the present invention has two connection methods, including a constant electrode connection method and a constant gas connection method. Among them, the constant electrode means that in the two test modes of electrolyzed water test and fuel cell test, the reaction of the anode or cathode always occurs on the same plate. The constant gas means that in the two test modes of electrolyzed water test and fuel cell test, the plate that generates or consumes oxygen (hydrogen) always remains the same.

[0055] As Figure 1 shown, it shows a schematic connection structure diagram of the control pipeline adopting the constant electrode connection method. The control pipeline adopts the constant electrode connection method: the first connection port of the first control pipeline 1 is connected to the first anode inlet 81, the second connection port is connected to the second anode inlet 91, and the third connection port is connected to the first inlet 62. The first connection port of the second control pipeline 2 is connected to the first cathode inlet 83, the second connection port is connected to the second cathode inlet 93, and the third connection port is connected to the second inlet 72. The first connection port of the third control pipeline 3 is connected to the first anode outlet 82, the second connection port is connected to the second anode outlet 92, and the third connection port is connected to the first outlet 63. The first connection port of the fourth control pipeline 4 is connected to the first cathode outlet 84, the second connection port is connected to the second cathode outlet 94, and the third connection port is connected to the second outlet 73;

[0056] A first electrolyzed water control valve 12, a first fuel control valve 13, and a first one-way valve 14 are provided on the first control pipeline 1. The first electrolyzed water control valve 12 is used to control the connection and disconnection between the first anode inlet 81 and the first inlet 62, and the first fuel control valve 13 is used to control the connection and disconnection between the second anode inlet 91 and the first inlet 62;

[0057] A second electrolyzed water control valve 22, a second fuel control valve 23, and a second one-way valve 24 are provided on the second control pipeline 2. The second electrolyzed water control valve 22 is used to control the connection and disconnection between the first cathode inlet 83 and the second inlet 72, and the second fuel control valve 23 is used to control the connection and disconnection between the second cathode inlet 93 and the second inlet 72;

[0058] A third electrolyzed water control valve 32 and a third fuel control valve 33 are provided on the third control pipeline 3. The third electrolyzed water control valve 32 is used to control the connection and disconnection between the first anode outlet 82 and the first outlet 63, and the third fuel control valve 33 is used to control the connection and disconnection between the second anode outlet 92 and the first outlet 63;

[0059] A fourth electrolyzed water control valve 42 and a fourth fuel control valve 43 are provided on the fourth control pipeline 4. The fourth electrolyzed water control valve 42 is used to control the connection and disconnection between the first cathode outlet 84 and the second outlet 73, and the fourth fuel control valve 43 is used to control the connection and disconnection between the second cathode outlet 94 and the second outlet 73.

[0060] It can be understood that when the electrolyzed water test is carried out with the control pipeline connected in the constant electrode connection mode, the first electrolyzed water control valve 12, the second electrolyzed water control valve 22, the third electrolyzed water control valve 32, and the fourth electrolyzed water control valve 42 are opened, so that the renewable fuel cell is only connected to the electrolyzed water test bench 8. Two first air switches 86 are closed to connect the DC power supply 85 to the ear of the two plates. The electrolyzed water test bench 8 injects anode water from the first inlet 62 into the first plate 6 through the first anode inlet 81, the first electrolyzed water control valve 12, and the first three-way valve 11. The anode water flows out through the first outlet 63, the third three-way valve 31, the third electrolyzed water control valve 32, and the first anode outlet 82. The electrolyzed water test bench 8 injects cathode water from the second inlet 72 into the second plate 7 through the first cathode inlet 83, the second electrolyzed water control valve 22, and the second three-way valve 21. The cathode water flows out through the second outlet 73, the fourth three-way valve 41, the fourth electrolyzed water control valve 42, and the first cathode outlet 84, or the electrolyzed water test bench 8 does not inject cathode water into the second plate 7 and closes the ball valve on the first cathode inlet 83 to avoid hydrogen backflow.

[0061] When conducting the electrolytic water mode test, the first electrode plate 6 is the anode. Anodic water undergoes an oxidation reaction in the first electrode plate 6 to generate oxygen, hydrogen ions, and electrons. The oxygen is discharged from the first anode outlet 82. The second electrode plate 7 is the cathode. Hydrogen ions undergo a reduction reaction in the second electrode plate 7 to generate hydrogen, and the hydrogen is discharged from the first cathode outlet 84.

[0062] When conducting a fuel cell test with the control pipeline connected in a constant electrode manner, open the first fuel control valve 13, the second fuel control valve 23, the third fuel control valve 33, and the fourth fuel control valve 43, so that the renewable fuel cell is only connected to the fuel cell test bench 9. Close the two second air switches 96 so that the DC load 95 is connected to the lugs of the two electrode plates. The fuel cell test bench 9 injects hydrogen from the first inlet 62 into the first electrode plate 6 through the second anode inlet 91, the first fuel control valve 13, and the first three-way valve 11. The hydrogen gas flows through the first outlet 63, the third three-way valve 31, the third fuel control valve 33, and is discharged from the second anode outlet 92. The fuel cell test bench 9 injects oxygen from the second inlet 72 into the second electrode plate 7 through the second cathode inlet 93, the second fuel control valve 23, and the second three-way valve 21. The oxygen gas flows through the second outlet 73, the fourth three-way valve 41, the fourth fuel control valve 43, and is discharged from the second cathode outlet 94.

[0063] When conducting a fuel cell test, the first electrode plate 6 is also the anode. Hydrogen undergoes an oxidation reaction in the first electrode plate 6 to generate hydrogen ions and electrons, and the excess hydrogen is discharged from the second anode outlet 92. The second electrode plate 7 is also the cathode. Oxygen undergoes a reduction reaction in the second electrode plate 7 to combine with hydrogen ions to form water, and the water is discharged from the second cathode outlet 94.

[0064] Therefore, in the case of a constant electrode, the electrode plate that generates oxygen during the electrolytic water test and the electrode plate that supplies hydrogen during the fuel cell test are the same electrode plate. The electrode plate that generates hydrogen during the electrolytic water test and the electrode plate that supplies oxygen during the fuel cell test are the same electrode plate. The first electrode plate 6 is always the anode, and the second electrode plate 7 is always the cathode. However, in the tests of the two modes, the gases in the first electrode plate 6 are different, and the gases in the second electrode plate 7 are also different. During the electrolytic water test, the gas in the first electrode plate 6 is oxygen, and the gas in the second electrode plate 7 is hydrogen. During the fuel cell test, the gas in the first electrode plate 6 is hydrogen, and the gas in the second electrode plate 7 is oxygen.

[0065] The control pipeline can also adopt a constant-gas connection method. Simply put, in the connection method of the constant electrode, only the second anode inlet 91 needs to be adjusted to be connected to the second control pipeline 2, the second anode outlet 92 to be adjusted to be connected to the fourth control pipeline 4, the second cathode inlet 93 to be adjusted to be connected to the first control pipeline 1, and the second cathode outlet 94 to be adjusted to be connected to the third control pipeline 3. Specifically: the first connection port of the first control pipeline 1 is connected to the first anode inlet 81, the second connection port is connected to the second cathode inlet 93, and the third connection port is connected to the first inlet 62; the first connection port of the second control pipeline 2 is connected to the first cathode inlet 83, the second connection port is connected to the second anode inlet 91, and the third connection port is connected to the second inlet 72; the first connection port of the third control pipeline 3 is connected to the first anode outlet 82, the second connection port is connected to the second cathode outlet 94, and the third connection port is connected to the first outlet 63; the first connection port of the fourth control pipeline 4 is connected to the first cathode outlet 84, the second connection port is connected to the second anode outlet 92, and the third connection port is connected to the second outlet 73.

[0066] When the electrolyzed water test is carried out with the control pipeline adopting the constant-gas connection method, the same as the case of the constant electrode, the first electrode plate 6 is the anode. Anodic water undergoes an oxidation reaction in the first electrode plate 6 to generate oxygen, hydrogen ions, and electrons. The oxygen is discharged from the first anode outlet 82. The second electrode plate 7 is the cathode. Hydrogen ions undergo a reduction reaction in the second electrode plate 7 to generate hydrogen, and the hydrogen is discharged from the first cathode outlet 84.

[0067] When the fuel cell test is carried out with the control pipeline adopting the constant-gas connection method, the first electrode plate 6 is the cathode. Oxygen is introduced into the first electrode plate 6 through the second cathode inlet 93. The oxygen undergoes a reduction reaction in the first electrode plate 6 to generate water. The second electrode plate 7 is the anode. Hydrogen is introduced into the second electrode plate 7 through the second anode inlet 91. The hydrogen undergoes an oxidation reaction in the second electrode plate 7 to generate hydrogen ions.

[0068] Therefore, in the case of constant gas, the electrode plate that generates oxygen during the electrolyzed water test and the electrode plate that supplies oxygen during the fuel cell test are the same electrode plate. The electrode plate that generates hydrogen during the electrolyzed water test and the electrode plate that supplies hydrogen during the fuel cell test are the same electrode plate. The polarities of the first electrode plate 6 and the second electrode plate 7 will change, but only oxygen will flow through the first electrode plate 6 all the time, and only hydrogen will flow through the second electrode plate 7.

[0069] The present invention can be adapted to two operating configurations of constant electrode and constant gas. Through the quick-insert pipeline connection, the switching and operation of the integrated renewable fuel cell under these two operating configurations can be realized.

[0070] It should be noted that in the constant gas configuration, the regenerative fuel cell (URFC) adopts independent hydrogen and oxygen electrodes. That is, the hydrogen evolution reaction (HER) of water electrolysis and the hydrogen oxidation reaction (HOR) of the fuel cell occur on the hydrogen side, and the oxygen evolution reaction (OER) of water electrolysis and the oxygen reduction reaction (ORR) of the fuel cell occur on the oxygen side. The so-called "constant gas" means that in the two modes, the side that generates or consumes oxygen (hydrogen) always remains the same. In the constant electrode configuration, the regenerative fuel cell (URFC) adopts independent anode and cathode plates. The HER reaction of water electrolysis and the ORR reaction of the fuel cell occur on the same side, while the OER of water electrolysis and the HOR reaction of the fuel cell occur on the other side. The so-called "constant electrode" means that in the two modes, the reactions of the anode or cathode always occur on the same side.

[0071] Each of the two configurations has its own advantages. The main advantage of the constant gas configuration is that it can effectively prevent hydrogen-oxygen mixing and achieve rapid switching between the water electrolysis test mode (EC mode) and the fuel cell test mode (FC mode). However, a significant limitation of this configuration is that the ORR and OER reactions occur simultaneously on the same electrode. Due to the mutual influence of these two reactions in terms of thermodynamics and kinetics, combined with the completely opposite functions of the oxygen evolution catalyst (IrO2) and the oxygen absorption catalyst (Pt), the system efficiency is significantly reduced. The constant electrode configuration cleverly solves this problem. Since the HOR reaction requires a lower platinum loading in the fuel cell test mode, placing it on the same electrode side as the OER reaction not only effectively reduces the platinum consumption in the mixed catalyst, reduces costs, but also can fully exert the reaction activity of the OER in the water electrolysis mode. On the other side, the ORR reaction of the fuel cell can make full use of the platinum-carbon catalyst. This design not only increases the effective active area of platinum but also avoids the carbon carrier corrosion problem of platinum in the high potential and acidic environment in the constant gas mode. Therefore, the constant electrode configuration has a higher round-trip efficiency and better overall performance compared to the constant gas configuration. However, it has the potential risk of hydrogen-oxygen channel crossover in the dual mode. If the switching process is improper, it is easy to cause hydrogen-oxygen contact in the channel, reducing the cycle service life of the regenerative fuel cell.

[0072] Such as Figure 1As shown in the figure, the test mode switching platform of the integrated renewable fuel cell of the present invention further includes a controller 5. The controller 5 includes a power supply, an EC switch, and an FC switch. The controller 5 is connected to the first electrolyzed water control valve 12, the first fuel control valve 13, the second electrolyzed water control valve 22, the second fuel control valve 23, the third electrolyzed water control valve 32, the third fuel control valve 33, the fourth electrolyzed water control valve 42, and the fourth fuel control valve 43. All the above control valves adopt solenoid valves. The first electrolyzed water control valve 12, the second electrolyzed water control valve 22, the third electrolyzed water control valve 32, and the fourth electrolyzed water control valve 42 are controlled by the EC switch. The first fuel control valve 13, the second fuel control valve 23, the third fuel control valve 33, and the fourth fuel control valve 43 are controlled by the FC switch. The EC switch and the FC switch are 2P interlock switches, that is, the two switches cannot be opened simultaneously. Therefore, when switching between the electrolyzed water test mode and the fuel cell test mode, only need to press the EC switch or the FC switch to complete the switching, and the operation is simple.

[0073] In some embodiments, a heating element is provided on the control pipeline. The heating element is used to connect to the fuel cell test bench 9. The heating element is used to control the temperature of the reactants in the control pipeline. The heating element can adopt a heating tape. Heating sheets are provided on the first plate 6 and the second plate 7. The heating sheets are connected to the fuel cell test bench 9. The heating sheets are used to control the temperature of the reactants in the renewable fuel cell.

[0074] The present invention also provides a test method, including:

[0075] Testing the fuel cell mode and the electrolyzed water mode by adopting the constant electrode method:

[0076] Connect the control pipeline in the connection mode of the constant electrode to conduct the electrolyzed water test or the fuel cell test;

[0077] When switching from the electrolyzed water mode to the fuel cell mode, disconnect the first air switch 86, and control the corresponding control valve to open through the controller 5, so that the renewable fuel cell is only connected to the fuel cell test bench 9. The fuel cell test bench 9 passes inert gas into the first plate 6 and the second plate 7 through the second anode inlet 91 and the second cathode inlet 93, and discharges the water and by-products in the renewable fuel cell from the second anode outlet 92 and the second cathode outlet 94; close the second air switch 96. The fuel cell test bench 9 passes hydrogen into the first plate 6 through the second anode inlet 91, and the fuel cell test bench 9 passes oxygen into the second plate 7 through the second cathode inlet 93, and starts to conduct the fuel cell test;

[0078] When switching from the fuel cell mode to the water electrolysis mode, the fuel cell test bench 9 passes an inert gas into the first plate 6 and the second plate 7 through the second anode inlet 91 and the second cathode inlet 93, discharges the hydrogen and oxygen in the renewable fuel cell from the second anode outlet 92 and the second cathode outlet 94, disconnects the second air switch 96, controls the opening of the corresponding control valve through the controller 5, so that the renewable fuel cell is only connected to the water electrolysis test bench 8, closes the first air switch 86, the water electrolysis test bench 8 injects anode water from the first inlet 62 into the first plate 6 through the first anode inlet 81, the water electrolysis test bench 8 injects cathode water from the second inlet 72 into the second plate 7 through the first cathode inlet 83, or the water electrolysis test bench 8 does not inject water into the second plate 7 and closes the ball valve on the first cathode inlet 83, and starts the water electrolysis test.

[0079] The fuel cell mode and the water electrolysis mode are tested by adopting a constant gas method:

[0080] The control pipeline is connected in a constant gas connection mode for water electrolysis test or fuel cell test;

[0081] When switching from the water electrolysis mode to the fuel cell mode, disconnect the first air switch 86, control the opening of the corresponding control valve through the controller 5, so that the renewable fuel cell is only connected to the fuel cell test bench 9; close the second air switch 96, the fuel cell test bench 9 passes hydrogen into the second plate 7 through the second anode inlet 91, the fuel cell test bench 9 passes oxygen into the first plate 6 through the second cathode inlet 93, and starts the fuel cell test;

[0082] When switching from the fuel cell mode to the water electrolysis mode, disconnect the second air switch 96, control the opening of the corresponding control valve through the controller 5, so that the renewable fuel cell is only connected to the water electrolysis test bench 8, close the first air switch 86, the water electrolysis test bench 8 injects anode water from the first inlet 62 into the first plate 6 through the first anode inlet 81, the water electrolysis test bench 8 injects cathode water from the second inlet 72 into the second plate 7 through the first cathode inlet 83, or the water electrolysis test bench 8 does not inject water into the second plate 7 and closes the ball valve on the first cathode inlet 83, and starts the water electrolysis test.

[0083] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An integrated renewable fuel cell test mode switching platform, characterized in that: The invention comprises a plurality of control pipelines, each of which comprises at least three connection ports, the three connection ports being respectively used to be connected to the interfaces of a water electrolysis test bench (8), a fuel cell test bench (9), and a regenerative fuel cell, and each of which has different interfaces for connecting to the water electrolysis test bench (8), the fuel cell test bench (9), and the regenerative fuel cell, so that the anode inlet of the water electrolysis test bench (8), one electrode plate of the regenerative fuel cell, and the anode outlet of the water electrolysis test bench (8) are connected, the cathode inlet of the water electrolysis test bench (8), another electrode plate of the regenerative fuel cell, and the cathode outlet of the water electrolysis test bench (8) are connected, the anode inlet of the fuel cell test bench (9), one electrode plate of the regenerative fuel cell, and the anode outlet of the fuel cell test bench (9) are connected, and the cathode inlet of the fuel cell test bench (9), another electrode plate of the regenerative fuel cell, and the cathode outlet of the fuel cell test bench (9) are connected; A control valve is arranged on the control pipeline, and the control valve is used to control the renewable fuel cell to be connected to the water electrolysis test bench (8) or to be connected to the fuel cell test bench (9).

2. The test mode switching platform of the integrated renewable fuel cell according to claim 1, characterized in that: The control pipeline comprises three pipelines, one end of the three pipelines is connected by a three-way valve, the other end of the three pipelines are respectively three connection ports, two of the three pipelines are provided with control valves, the two pipelines provided with control valves are respectively used to connect to a water electrolysis test bench (8) and a fuel cell test bench (9), and the other pipeline is used to connect to a renewable fuel cell.

3. The test mode switching platform of the integrated renewable fuel cell according to claim 1, characterized in that: It comprises a controller (5) which is used to control the on-off of a control valve so that the regenerative fuel cell is only connected to a water electrolysis test bench (8) or only connected to a fuel cell test bench (9).

4. The test mode switching platform of the integrated renewable fuel cell according to claim 1, characterized in that: A heating element is arranged on the control pipeline, the heating element is used to be connected to a fuel cell test bench (9), and the heating element is used to control the temperature of reactants in the control pipeline.

5. A test system for the test mode switching platform of the integrated renewable fuel cell according to any one of claims 1 to 4, characterized in that: include: A water electrolysis test bench (8), a fuel cell test bench (9), and a renewable fuel cell; the renewable fuel cell is connected to the water electrolysis test bench (8) and the fuel cell test bench (9) via a plurality of control pipelines.

6. A test system according to claim 5, characterized in that: The water electrolysis test bench (8) comprises a first anode inlet (81), a first anode outlet (82), a first cathode inlet (83), a first cathode outlet (84), and a direct current power supply (85); The fuel cell test bench (9) comprises a second anode inlet (91), a second anode outlet (92), a second cathode inlet (93), a second cathode outlet (94), and a DC load (95); The renewable fuel cell comprises a first electrode plate (6) and a second electrode plate (7); the first electrode plate (6) is provided with a first electrode lug (61), a first inlet (62), and a first outlet (63); the second electrode plate (7) is provided with a second electrode lug (71), a second inlet (72), and a second outlet (73); the first electrode lug (61) and the second electrode lug (71) are connected to a DC power source (85) via a first air switch (86); the first electrode lug (61) and the second electrode lug (71) are connected to a DC load (95) via a second air switch (96); A control pipeline, wherein the control pipeline comprises a first control pipeline (1), a second control pipeline (2), a third control pipeline (3), and a fourth control pipeline (4); The control pipeline adopts a constant electrode connection method: the first connection port of the first control pipeline (1) is connected to the first anode inlet (81), the second connection port is connected to the second anode inlet (91), and the third connection port is connected to the first inlet (62); the first connection port of the second control pipeline (2) is connected to the first cathode inlet (83), the second connection port is connected to the second cathode inlet (93), and the third connection port is connected to the second inlet (72); the first connection port of the third control pipeline (3) is connected to the first anode outlet (82), the second connection port is connected to the second anode outlet (92), and the third connection port is connected to the first outlet (63); the first connection port of the fourth control pipeline (4) is connected to the first cathode outlet (84), the second connection port is connected to the second cathode outlet (94), and the third connection port is connected to the second outlet (73); Or the control pipeline adopts a constant gas connection method: the first connection port of the first control pipeline (1) is connected to the first anode inlet (81), the second connection port is connected to the second cathode inlet (93), and the third connection port is connected to the first inlet (62); the first connection port of the second control pipeline (2) is connected to the first cathode inlet (83), the second connection port is connected to the second anode inlet (91), and the third connection port is connected to the second inlet (72); the first connection port of the third control pipeline (3) is connected to the first anode outlet (82), the second connection port is connected to the second cathode outlet (94), and the third connection port is connected to the first outlet (63); the first connection port of the fourth control pipeline (4) is connected to the first cathode outlet (84), the second connection port is connected to the second anode outlet (92), and the third connection port is connected to the second outlet (73).

7. The test system according to claim 6, characterized in that: A heating plate is provided on the first electrode plate (6) and the second electrode plate (7), the heating plate is connected to a fuel cell test bench (9), and the heating plate is used to control the temperature of reactants in a renewable fuel cell.

8. A testing method of a testing system according to any one of claims 5 to 7, characterized in that: include: The fuel cell mode and water electrolysis mode were tested using a constant electrode method; The fuel cell mode and water electrolysis mode were tested using a constant gas method.

9. The method of use according to claim 8, characterized in that: The tests in fuel cell mode and water electrolysis mode using constant electrode method include: Connect the control pipeline using a constant electrode connection method to perform water electrolysis test or fuel cell test; When switching from the water electrolysis mode to the fuel cell mode, the first air switch (86) is disconnected, and the corresponding control valve is controlled to open by the controller (5), so that the regenerative fuel cell is only connected to the fuel cell test bench (9), and the fuel cell test bench (9) passes inert gas into the first electrode plate (6) and the second electrode plate (7) through the second anode inlet (91) and the second cathode inlet (93), and the water and byproducts in the regenerative fuel cell are discharged from the second anode outlet (92) and the second cathode outlet (94); the second air switch (96) is closed, and the fuel cell test bench (9) passes hydrogen into the first electrode plate (6) through the second anode inlet (91), and the fuel cell test bench (9) passes oxygen into the second electrode plate (7) through the second cathode inlet (93), and the fuel cell test is started; When switching from the fuel cell mode to the water electrolysis mode, the fuel cell test bench (9) introduces an inert gas into the first electrode plate (6) and the second electrode plate (7) through the second anode inlet (91) and the second cathode inlet (93), discharges hydrogen and oxygen in the regenerative fuel cell from the second anode outlet (92) and the second cathode outlet (94), disconnects the second air switch (96), controls the corresponding control valve to open through the controller (5), so that the regenerative fuel cell is only connected to the water electrolysis test bench (8), closes the first air switch (86), and the water electrolysis test bench (8) injects anode water from the first inlet (62) into the first electrode plate (6) through the first anode inlet (81), and the water electrolysis test bench (8) injects cathode water from the second inlet (72) into the second electrode plate (7) through the first cathode inlet (83), or the water electrolysis test bench (8) does not inject water into the second electrode plate (7) and closes the ball valve on the first cathode inlet (83), and starts the water electrolysis test.

10. The method of use according to claim 8, characterized in that: The tests of fuel cell mode and water electrolysis mode using constant gas method include: Connect the control pipeline using a constant gas connection method to perform water electrolysis test or fuel cell test; When switching from the water electrolysis mode to the fuel cell mode, the first air switch (86) is disconnected, and the corresponding control valve is controlled to open by the controller (5), so that the regenerative fuel cell is only connected to the fuel cell test bench (9); the second air switch (96) is closed, and the fuel cell test bench (9) passes hydrogen to the second electrode plate (7) through the second anode inlet (91), and the fuel cell test bench (9) passes oxygen to the first electrode plate (6) through the second cathode inlet (93), and the fuel cell test is started; When switching from the fuel cell mode to the water electrolysis mode, the second air switch (96) is disconnected, and the corresponding control valve is controlled to open by the controller (5), so that the renewable fuel cell is only connected to the water electrolysis test bench (8), and the first air switch (86) is closed. The water electrolysis test bench (8) injects anode water from the first inlet (62) into the first electrode plate (6) through the first anode inlet (81), and the water electrolysis test bench (8) injects cathode water from the second inlet (72) into the second electrode plate (7) through the first cathode inlet (83), or the water electrolysis test bench (8) does not inject water into the second electrode plate (7) and closes the ball valve on the first cathode inlet (83), and starts the water electrolysis test.

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