A detection device for a fuel cell

Abstract

The application discloses a detection device for a fuel cell, which comprises a box body and a detection box, the inside of the box body is provided with a fuel cell, the right side wall of the box body is connected with a first connecting pipeline, the top end of the box body is provided with a pressure gauge, the top end of the box body is fixed with an air extractor, the inside of the air extractor is fixed with a second connecting pipeline, the left side wall of the box body is connected with a third connecting pipeline, through the design of the first connecting pipeline, the first valve, the gas cylinder, the pressure gauge, the air extractor, the second connecting pipeline, the third connecting pipeline, the plugging block, the detection box, the heating device and the cupric oxide, the inside of the box body can be extracted into a vacuum state by the air extractor, the pressure condition in the box body is displayed by the pressure gauge, and the staff can conveniently observe; the whole can quickly and simply detect whether the fuel cell has a hydrogen leakage condition, and the hydrogen leakage condition does not occur in the inside of the box body and the detection box during the detection process.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, specifically to a testing device for fuel cells. Background Technology

[0002] A fuel cell is an energy conversion device that, based on electrochemical principles (i.e., the working principle of a galvanic cell), isothermally converts the chemical energy stored in fuel and oxidant directly into electrical energy; therefore, the actual process is a redox reaction. A fuel cell mainly consists of four parts: the anode, cathode, electrolyte, and external circuitry. Fuel gas and oxidant gas are introduced through the anode and cathode, respectively. The fuel gas releases electrons at the anode, which are conducted through the external circuit to the cathode and combine with the oxidant gas to form ions. Under the influence of an electric field, the ions migrate through the electrolyte to the anode, react with the fuel gas, form a circuit, and generate an electric current. Simultaneously, due to the electrochemical reaction itself and the internal resistance of the cell, the fuel cell also generates a certain amount of heat. In addition to conducting electrons, the anode and cathode also act as catalysts for the redox reaction. When the fuel is a hydrocarbon, the anode requires higher catalytic activity. The anode and cathode are usually porous to facilitate the introduction of reactant gases and the removal of products. The electrolyte plays a role in transferring ions and separating fuel gas and oxidant gas. To prevent the mixing of the two gases from causing a short circuit within the cell, the electrolyte is usually a dense structure.

[0003] Since fuel cells involve hydrogen, hydrogen leakage during operation can lead to serious consequences. Therefore, ensuring the airtightness of fuel cells before and after leaving the factory is of paramount importance. Consequently, it is necessary to develop specialized airtightness testing devices and methods for fuel cells. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a detection device for fuel cells, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: A testing device for a fuel cell, comprising a housing and a testing chamber. A fuel cell is disposed inside the housing. A first connecting pipe is connected through the right side wall of the housing. A gas storage cylinder is fixed to the bottom end of the first connecting pipe. A first valve is rotatably connected through the middle of the first connecting pipe. A pressure gauge is installed at the top of the housing. A vacuum pump is fixed to the top of the housing. A second connecting pipe is fixed inside the vacuum pump. A third connecting pipe is connected through the left side wall of the housing. A sealing block is rotatably connected inside the third connecting pipe. A second valve is rotatably connected to the top of the second connecting pipe. A fourth connecting pipe is connected through the left side of the vacuum pump. A third valve is rotatably connected inside the fourth connecting pipe. A testing chamber is fixed to the left side of the third connecting pipe. A solution tank is fixed to the top of the testing chamber. A heating device is fixed to the bottom of the testing chamber. A heating plate is slidably connected inside the testing chamber. Copper oxide is disposed on the top of the heating plate. A coating is disposed on the inner wall of the testing chamber. The device includes a trigger button, a flame-throwing device fixed to the top of the detection box, a first placement block fixed to the outer wall of the back of the detection box, a motor fixed to the outer surface of the first placement block, a first gear fixed to the right side of the motor, a first rack meshing with the outer surface of the first gear, a first connecting rod, a second connecting rod, a first traction rope, and a second traction rope fixed to the outer surface of the first rack, a snap-fit ​​plate fixed to the outer surface of the first placement block, a shut-off button fixed to the bottom of the snap-fit ​​plate, a second placement block fixed to the bottom of the fourth connecting pipe, a second rack fixed to the end of the second connecting rod away from the first rack, a second gear meshing with the right side of the second rack, a first bevel gear fixed to the outer surface of the second gear, a second bevel gear fixed to the bottom of the third valve, a third placement block fixed to the outer surface of the second connecting pipe, a third rack fixed to the end of the first connecting rod away from the first rack, a third gear meshing with the left side of the third rack, a third bevel gear fixed to the outer surface of the third gear, and a fourth bevel gear fixed to the top of the second valve.

[0008] Preferably, one end of the first traction rope is fixed to the outer surface of the first rack, and the other end of the first traction rope is fixed to the bottom end of the sealing plate. One end of the second traction rope is fixed to the outer surface of the first rack, and the other end of the second traction rope is fixed to the inside of the flame-spraying device and connected to the switch inside it.

[0009] Preferably, the second gear is rotatably connected to the outer surface of the second placement block, and the first bevel gear and the second bevel gear mesh with each other, and the size of the first bevel gear is larger than the size of the second bevel gear.

[0010] Preferably, the third gear is rotatably connected to the outer surface of the third placement block, and the third bevel gear meshes with the fourth bevel gear. The size of the third bevel gear is larger than that of the fourth bevel gear. The first bevel gear and the third bevel gear are of the same size, and the second bevel gear and the fourth bevel gear are of the same size.

[0011] Preferably, one end of the fourth connecting pipe is fixed inside the vacuum pump, and the other end of the fourth connecting pipe passes through and is fixed to the top of the solution tank. The solution stored inside the solution tank is supercritical water under high pressure and high temperature.

[0012] Preferably, the trigger button is a high-temperature resistant and high-precision weight sensing device, and the trigger button is electrically connected to the motor, as is the close button.

[0013] Preferably, the heating plate is made of high-temperature resistant quartz, and the outer surface of the testing box has an observation window, and the observation window and the testing box are sealed.

[0014] Preferably, the second connecting pipe and the fourth connecting pipe are interconnected inside the vacuum pump.

[0015] (III) Beneficial Effects

[0016] This invention provides a detection device for fuel cells. It has the following advantages:

[0017] (1) The detection device for fuel cells, through the design of the first connecting pipe, the first valve, the gas storage bottle, the pressure gauge, the pump, the second connecting pipe, the third connecting pipe, the sealing block, the detection box, the heating device and the copper oxide, can evacuate the inside of the box to a vacuum state through the pump, and the pressure gauge can display the gas pressure inside the box for easy observation by the staff. Then, the gas storage bottle delivers inert gas nitrogen into the box to continuously pressurize the inside of the box, so that it opens the sealing block and brings the gas inside the box into the detection box. Then, the heated copper oxide in the detection box reacts with the gas, and the color change can be observed through the observation window. The whole device can quickly and easily detect whether there is hydrogen leakage in the fuel cell, and the hydrogen leakage will not occur during the detection process because the device is always inside the box and the detection box.

[0018] (2) The detection device for fuel cells, through the design of a trigger button, a first traction rope, a second traction rope, a flame-spraying device, a sealing plate, a motor, a first gear, a first rack, a first connecting rod, a second connecting rod, a second rack, a second gear, a first bevel gear, a second bevel gear, a third rack, a third gear, a third bevel gear, a fourth bevel gear, a second valve, and a third valve, can trigger the trigger button to open the motor after copper oxide reacts with hydrogen, thereby closing the second valve and opening the third valve. The sealing plate opens, the flame-spraying device opens, and the hydrogen inside the detection box is ignited and purified. The gas inside the box is drawn into the solution tank by the vacuum pump and absorbed, effectively cleaning up the leaked hydrogen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the detection device for the fuel cell of the present invention;

[0020] Figure 2 This is a schematic diagram of the rear structure of the detection device for the fuel cell of the present invention;

[0021] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B;

[0023] Figure 5 For the present invention Figure 2 Enlarged structural diagram at point C.

[0024] In the diagram: 1. Housing; 2. Fuel cell; 3. First connecting pipe; 4. First valve; 5. Gas storage cylinder; 6. Pressure gauge; 7. Vacuum pump; 8. Second connecting pipe; 9. Third connecting pipe; 10. Sealing block; 11. Second valve; 12. First connecting rod; 13. Fourth connecting pipe; 14. Third valve; 15. Second connecting rod; 16. Solution tank; 17. Detection box; 18. Heating device; 19. Copper oxide; 20. Heating plate; 21. Trigger button; 22. Sprayer 23. Fire device; 24. First placement block; 25. Motor; 26. Sealing plate; 27. Rotating shaft; 28. First traction rope; 29. ​​Second traction rope; 30. First gear; 31. First rack; 32. Snap-fit ​​plate; 33. Close button; 34. Second rack; 35. Second gear; 36. First bevel gear; 37. Second bevel gear; 38. Third placement block; 39. Third rack; 40. Third gear; 41. Third bevel gear; 42. Fourth bevel gear. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-5This invention provides a technical solution: a testing device for a fuel cell, comprising a housing 1 and a testing chamber 17. A fuel cell 2 is housed inside the housing 1. The sealed housing 1 effectively stores gas inside to prevent leakage. A first connecting pipe 3 is connected through the right side wall of the housing 1. A gas storage cylinder 5 is fixed to the bottom end of the first connecting pipe 3. The gas storage cylinder 5 stores inert gas that can be supplied to the housing 1. A first valve 4 is rotatably connected through the middle of the first connecting pipe 3. A pressure gauge 6 is installed at the top of the housing 1. A vacuum pump 7 is fixed to the top of the housing 1. The vacuum pump 7 can extract the gas inside the housing 1 to achieve a vacuum state. A second connecting pipe 8 is fixed inside the vacuum pump 7. The left side of the housing 1... A third connecting pipe 9 is connected through the wall. A sealing block 10 is rotatably connected inside the third connecting pipe 9, which isolates the housing 1 from the detection box 17. A second valve 11 is rotatably connected to the top of the second connecting pipe 8. A fourth connecting pipe 13 is connected through the left side of the vacuum pump 7. The second connecting pipe 8 and the fourth connecting pipe 13 are interconnected inside the vacuum pump 7. A third valve 14 is rotatably connected inside the fourth connecting pipe 13. The detection box 17 is fixed to the left side of the third connecting pipe 9. A solution tank 16 is fixed to the top of the detection box 17. The solution inside the solution tank 16 effectively absorbs hydrogen gas to prevent leakage and pollution. One end of the fourth connecting pipe 13 is fixed inside the vacuum pump 7. The other end of the connecting pipe 13 passes through and is fixed to the top of the solution tank 16. The solution stored inside the solution tank 16 is supercritical water under high pressure and high temperature. A heating device 18 is fixed to the bottom of the detection box 17. A heating plate 20 is slidably connected inside the detection box 17. The heating plate 20 is made of high-temperature resistant quartz. An observation window is opened on the outer surface of the detection box 17. The observation window and the detection box 17 are sealed. Copper oxide 19 is set on the top of the heating plate 20. Copper oxide 19 will show obvious color change after reacting with hydrogen gas, which is convenient for staff to observe. The connection is via the first connecting pipe 3, the first valve 4, the gas storage bottle 5, the pressure gauge 6, the vacuum pump 7, the second connecting pipe 8, the third connecting pipe 9, the sealing block 10, and the detection box 17. The design of the heating device 18 and copper oxide 19 allows the vacuum pump 7 to create a vacuum inside the housing 1, with the pressure gauge 6 displaying the internal pressure for easy observation. Then, inert nitrogen gas is continuously supplied from the gas storage cylinder 5 to the housing 1, pressurizing it and causing it to open the sealing block 10, bringing the gas inside the housing 1 into the detection chamber 17. The heated copper oxide 19 in the detection chamber 17 reacts with the gas, and the color change is observed through the observation window. This allows for quick and simple detection of hydrogen leakage in the fuel cell 2, and the gas remains inside the housing 1 and detection chamber 17 throughout the detection process, preventing any hydrogen leakage. A trigger button 21 is installed on the inner wall of the detection chamber 17.A flame-throwing device 22 is fixed to the top of the detection box 17. The flame-throwing device 22 can ignite the hydrogen gas flowing outward from the detection box 17 to prevent environmental pollution. A first placement block 23 is fixed to the outer wall of the back of the detection box 17. A motor 24 is fixed to the outer surface of the first placement block 23. A first gear 29 is fixed to the right side of the motor 24. A first rack 30 meshes with the outer surface of the first gear 29. A first connecting rod 12, a second connecting rod 15, a first traction rope 27, and a second traction rope 28 are fixed to the outer surface of the first rack 30. One end of the first traction rope 27 is fixed to the outer surface of the first rack 30, and the other end of the first traction rope 27 is fixed to the bottom end of the sealing plate 25. One end of the second traction rope 28 is fixed to the outer surface of the first rack 30. The other end of the second traction rope 28 is fixed inside the flame-throwing device 22 and connected to its internal switch. A snap-fit ​​plate 31 is fixed to the outer surface of the first placement block 23, and a shut-off button 32 is fixed to the bottom of the snap-fit ​​plate 31. The trigger button 21 is a high-temperature resistant and high-precision weight sensing device, and the trigger button 21 is electrically connected to the motor 24. The shut-off button 32 is also electrically connected to the motor 24. The bottom end of the fourth connecting pipe 13 is fixed to the second placement block 33. The end of the second connecting rod 15 away from the first rack 30 is fixed to the second rack 34. The right side of the second rack 34 is meshed with the second gear 35. The second gear 35 is rotatably connected to the outer surface of the second placement block 33, and the first bevel gear 36 and the second bevel gear 37 mesh with each other. The size of the first bevel gear 36 is larger than that of the second bevel gear 37. The first bevel gear 36 is fixed to the outer surface of the second gear 35. The bottom end of the third valve 14 is fixedly connected to the second bevel gear 37. The rotation of the second bevel gear 37 can drive the third valve 14 to open. The outer surface of the second connecting pipe 8 is fixed to the third placement block 38. The end of the first connecting rod 12 away from the first rack 30 is fixed to the third rack 39. The left side of the third rack 39 is meshed with the third gear 40. The outer surface of the third gear 40 is fixed to the third bevel gear 41. The top of the second valve 11 is fixed to the fourth bevel gear 42. The rotation of the fourth bevel gear 42 can drive the second valve 11 to close. The third gear 40 is rotatably connected to the outer surface of the third placement block 38. On the surface, the third bevel gear 41 and the fourth bevel gear 42 mesh with each other, and the size of the third bevel gear 41 is larger than the size of the fourth bevel gear 42. The first bevel gear 36 and the third bevel gear 41 are the same size, and the second bevel gear 37 and the fourth bevel gear 42 are the same size. Through the design of the trigger button 21, the first traction rope 27, the second traction rope 28, the flame-spraying device 22, the sealing plate 25, the motor 24, the first gear 29, the first rack 30, the first connecting rod 12, the second connecting rod 15, the second rack 34, the second gear 35, the first bevel gear 36, the second bevel gear 37, the third rack 39, the third gear 40, the third bevel gear 41, the fourth bevel gear 42, the second valve 11, and the third valve 14,After copper oxide 19 reacts with hydrogen, the trigger button 21 is activated, motor 24 closes the second valve 11, and the third valve 14 opens. The sealing plate 25 opens, and the flame-emitting device 22 ignites and purifies the hydrogen gas inside the detection chamber 17. The gas inside the chamber 1 is drawn into the solution tank 16 by the vacuum pump 7 and absorbed, effectively cleaning up any leaked hydrogen gas.

[0027] Working principle: The fuel cell 2 to be tested is placed inside the housing 1 to keep it in a sealed state. The vacuum pump 7 is turned on to extract the gas inside the housing 1 to create a vacuum. The pressure gauge 6 is used to observe the gas pressure inside the housing 1. After the vacuuming is completed, the first valve 4 is opened and the gas storage cylinder 5 continuously supplies inert gas into the housing 1 through the first connecting pipe 3. This causes the gas inside the housing 1 to open the sealing block 10 located inside the third connecting pipe 9, allowing the gas inside the housing 1 to reach the detection chamber 17. Then the first valve 4 is closed. The heating device 18 inside the detection chamber 17 heats the copper oxide 19 through the heating plate 20. If the gas entering the detection chamber 17 contains hydrogen, the copper oxide 19 will react with the hydrogen, change color, and increase its weight, causing the trigger button 21 to open. The trigger button 21 controls the motor 24 to start, driving the first gear 29 to rotate. The first gear 29 drives the first rack 30 to move downward. The first rack 30 simultaneously drives the first traction rope 27, the second traction rope 28, and the first... The downward movement of connecting rod 12 and second connecting rod 15 causes the first traction rope 27 to rotate the rotating shaft 26, which in turn opens the sealing plate 25. The second traction rope 28 then opens the flame-emitting device 22, igniting the gas flowing out of the detection box 17 through the opening to prevent hydrogen leakage and environmental pollution. The downward movement of the first connecting rod 12 causes the third rack 39 to move downward, which in turn rotates the third gear 40. The rotation of the third gear 40 simultaneously rotates the third bevel gear 41, which in turn rotates the fourth bevel gear 42. The rotation of the fourth bevel gear 42 simultaneously closes the second valve 11. The downward movement of the second connecting rod 15 causes the second rack 34 to move downward, which in turn rotates the second gear 35. The rotation of the second gear 35 simultaneously rotates the first bevel gear 36, which in turn rotates the second bevel gear 37. The second bevel gear 37 opens the third valve 14 and then opens the vacuum pump 7, transporting the gas inside the box 1 to the solution tank 16 through the fourth connecting pipe 13 for hydrogen absorption.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for fuel cells, comprising a housing (1) and a testing box (17), characterized in that: The housing (1) houses a fuel cell (2). A first connecting pipe (3) is connected through the right side wall of the housing (1). A gas storage cylinder (5) is fixed at the bottom end of the first connecting pipe (3). A first valve (4) is rotatably connected through the middle of the first connecting pipe (3). A pressure gauge (6) is installed at the top of the housing (1). A vacuum pump (7) is fixed at the top of the housing (1). A second connecting pipe (8) is fixed inside the vacuum pump (7). A third connecting pipe (9) is connected through the left side wall of the housing (1). A sealing block (10) is rotatably connected inside the third connecting pipe (9). A second valve (10) is rotatably connected to the top of the second connecting pipe (8). 1) A fourth connecting pipe (13) is connected through the left side of the vacuum pump (7). A third valve (14) is rotatably connected inside the fourth connecting pipe (13). A detection box (17) is fixed to the left side of the third connecting pipe (9). A solution tank (16) is fixed to the top of the detection box (17). A heating device (18) is fixed to the bottom inside the detection box (17). A heating plate (20) is slidably connected inside the detection box (17). Copper oxide (19) is provided at the top of the heating plate (20). A trigger button (21) is provided on the inner wall of the detection box (17). A flame-throwing device (22) is fixed to the top of the detection box (17). The back of the detection box (17) A first placement block (23) is fixed to the outer wall. A motor (24) is fixed to the outer surface of the first placement block (23). A first gear (29) is fixed to the right side of the motor (24). A first rack (30) meshes with the outer surface of the first gear (29). A first connecting rod (12), a second connecting rod (15), a first traction rope (27), and a second traction rope (28) are fixed to the outer surface of the first rack (30). A snap-fit ​​plate (31) is fixed to the outer surface of the first placement block (23). A shut-off button (32) is fixed to the bottom end of the snap-fit ​​plate (31). A second placement block (33) is fixed to the bottom end of the fourth connecting pipe (13). The second connecting rod (15) is away from the first rack (38). One end of the first connecting rod (12) is fixed with a second rack (34), the right side of the second rack (34) is meshed with a second gear (35), the outer surface of the second gear (35) is fixed with a first bevel gear (36), the bottom end of the third valve (14) is fixed with a second bevel gear (37), the outer surface of the second connecting pipe (8) is fixed with a third placement block (38), the end of the first connecting rod (12) away from the first rack (30) is fixed with a third rack (39), the left side of the third rack (39) is meshed with a third gear (40), the outer surface of the third gear (40) is fixed with a third bevel gear (41), and the top end of the second valve (11) is fixed with a fourth bevel gear (42).

2. The detection device for a fuel cell according to claim 1, characterized in that: One end of the first traction rope (27) is fixed to the outer surface of the first rack (30), and the other end of the first traction rope (27) is fixed to the bottom end of the sealing plate (25). One end of the second traction rope (28) is fixed to the outer surface of the first rack (30), and the other end of the second traction rope (28) is fixed to the inside of the flame-spraying device (22) and connected to the switch inside it.

3. The detection device for fuel cells according to claim 1, characterized in that: The second gear (35) is rotatably connected to the outer surface of the second placement block (33), and the first bevel gear (36) meshes with the second bevel gear (37), and the size of the first bevel gear (36) is larger than the size of the second bevel gear (37).

4. The detection device for a fuel cell according to claim 1, characterized in that: The third gear (40) is rotatably connected to the outer surface of the third placement block (38), and the third bevel gear (41) meshes with the fourth bevel gear (42). The size of the third bevel gear (41) is larger than that of the fourth bevel gear (42). The first bevel gear (36) and the third bevel gear (41) are of the same size, and the second bevel gear (37) and the fourth bevel gear (42) are of the same size.

5. A detection device for a fuel cell according to claim 1, characterized in that: One end of the fourth connecting pipe (13) is fixed inside the vacuum pump (7), and the other end of the fourth connecting pipe (13) passes through and is fixed to the top of the solution tank (16). The solution stored inside the solution tank (16) is supercritical water under high pressure and high temperature.

6. A detection device for a fuel cell according to claim 1, characterized in that: The trigger button (21) is a high-temperature resistant and high-precision weight sensing device, and the trigger button (21) is electrically connected to the motor (24). The close button (32) is also electrically connected to the motor (24).

7. A detection device for a fuel cell according to claim 1, characterized in that: The heating plate (20) is made of high-temperature resistant quartz material, and the outer surface of the detection box (17) is provided with an observation window, and the observation window and the detection box (17) are sealed.

8. A detection device for a fuel cell according to claim 1, characterized in that: The second connecting pipe (8) and the fourth connecting pipe (13) are interconnected inside the vacuum pump (7).

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