A methanol fuel cell testing device

Abstract

The present invention relates to a methanol fuel cell testing device applied to the technical field related to battery testing. Through the arrangement of a gas collecting cover and a monitoring tube, leaked gas can be collected when a gas leak occurs, so that the monitoring tube can quickly sense the gas leak. Compared with the prior art, the gas leak can be detected at the early stage, and when the gas collected in the gas collecting cover is saturated, the gas inlet and the gas supply pipe can resume stable gas supply again, greatly reducing the impact of the gas leak on the fuel cell, and effectively ensuring the power conversion efficiency of the fuel cell; in addition, under the arrangement of a gas change component, when a gas leak is detected, the gas change component can be triggered and gas can be inflated into the gas collecting cover for gas compensation, thereby accelerating the saturation of the gas in the gas collecting cover, and further accelerating the speed at which the gas supply stability of the gas inlet and the gas supply pipe is restored after the gas leak, thereby further reducing the impact of the gas leak on the power conversion efficiency.

Description

Technical Field

[0001] The present invention relates to a battery testing device, and in particular to a methanol fuel cell testing device applied to the technical field related to battery testing. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of a fuel directly into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydroelectric power generation, thermal power generation, and atomic power generation. In addition, fuel cells use fuel and oxygen as raw materials and have no mechanical transmission parts, so they emit very little harmful gas and have a long service life.

[0003] The gas supply is affected by the air tightness of the fuel cell gas supply pipe. Therefore, it is necessary to test the air tightness of the connection between the external gas supply pipe and the gas inlet in the battery to prevent the problem of gas supply being lower than the actual demand due to leakage. Regarding the measurement of the air tightness of the gas supply pipe, generally a certain pressure of gas is introduced into the corresponding loop port of the fuel cell stack, and then it is sealed. After waiting for a certain period of time, if the pressure displayed on the pressure gauge decreases, it means there is a leakage.

[0004] However, the above method requires regular detection, but not real-time detection. Chinese patent CN115064739A discloses a rapid detection device for the gas supply of a fuel cell stack, which can achieve real-time monitoring of the gas supply mainly through the cooperation of multiple pressure sensors. This patent avoids the problem of gas leakage during the gas supply process and directly detects from the change of the gas supply itself. However, when a gas leakage occurs, the leakage is small at the beginning, resulting in a small overall change in the gas supply, which makes it difficult to detect the leakage in the early stage. When the gas supply changes significantly, the fuel cell has already been affected by insufficient gas supply. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that it is difficult to detect the leakage in the early stage. When it is detected, the fuel cell has already been affected by insufficient gas supply, thereby affecting the power conversion efficiency.

[0006] In order to solve the above problems, the present invention provides a methanol fuel cell testing device, including a gas collecting cover, which is installed on the outside of the connection between the gas inlet of the fuel cell and the gas supply pipe for external inflation, the gas inlet and the gas supply pipe are connected by a pipe joint, a control center is installed on the gas collecting cover, the control center signal is connected to a comparison module and an alarm, the alarm is installed on the gas collecting cover, a positioning ring is fixedly connected to the outside of the gas inlet, a sealing ring is arranged on the outer sleeve of the gas inlet, one end of the gas collecting cover is in conflict with the sealing ring, the other end of the gas collecting cover is fixedly connected to the gas supply pipe, and the gas collecting cover is fixedly connected to the gas supply pipe. A gas leakage detection unit is arranged on the outer cover, and the gas leakage detection unit includes a top plate, a plurality of vertical poles fixedly connected between the lower end of the top plate and the gas collecting outer cover, and a monitoring tube fixedly passing through the gas collecting outer cover, the monitoring tube includes a tube body, an elastic telescopic rod movably passing through the tube body, a push plate fixedly connected to the lower end of the elastic telescopic rod, and a light sensor installed at the lower end of the push plate, the push plate is completely fitted with the inner wall of the tube body, and the push plate and the light sensor are located on the inner side of the gas collecting outer cover, the light sensor is connected with the signal of the control center, and a limit ring is also fixedly connected to the inner wall of the tube body, and the limit ring is located on the outer side of the gas collecting outer cover.

[0007] In the above-mentioned methanol fuel cell testing device, through the setting of the gas collecting cover and the monitoring tube, the leaked gas can be collected when a leak occurs, so that the monitoring tube can quickly sense the leak. Compared with the existing technology, the leak can be detected in the early stage, and when the collected gas in the gas collecting cover is saturated, the air inlet and the air supply pipe can resume stable air supply again, which greatly reduces the impact of the leak on the fuel cell and effectively ensures the energy conversion efficiency of the fuel cell.

[0008] As a further improvement of the present application, the portion of the tube body located outside the gas collecting cover is a hard transparent structure, and the portion of the tube body located inside the gas collecting cover is a hard non-transparent structure.

[0009] As a further improvement of the present application, the corresponding edges of the sealing ring and the gas collecting outer cover are both chamfered, and the cross-sectional slopes of the chamfers of the two are kept consistent.

[0010] As another improved supplement of the present application, two pressure sensors are installed at the lower end of the limit ring, and both pressure sensors are connected to the control center signal.

[0011] As another improvement of the present application, an air supply unit is further provided outside the monitoring tube, and the air supply unit includes a compensating air hole drilled on the monitoring tube and a gas storage bottle installed on the gas collecting cover, the gas storage bottle is communicated with the compensating air hole, and the gas storage bottle is filled with compressed air, and a gas change component is provided at the compensating air hole, and the gas change component is used to control the connection between the gas storage bottle and the gas collecting cover.

[0012] As another improvement supplement to the present application, an air variable ring groove is drilled in the middle of the inner wall of the compensation air hole, and the air variable assembly includes an electromagnetic plate fixedly connected to the lower end of the push plate and a sealing magnet located in the air variable ring groove, and a plurality of elastic strips are fixedly connected between the sealing magnet and the inner wall of the air variable ring groove away from the electromagnetic plate, and an L air guide hole is drilled in the monitoring tube, and the L air guide hole connects the gas storage bottle and the air variable ring groove.

[0013] As another improvement supplement of the present application, when the push plate and the pressure sensor conflict with each other, the electromagnetic sheet is facing the compensation air hole, and the electromagnetic sheet generates magnetic repulsion to the sealing magnet after being energized, and the on and off of the electromagnetic sheet is controlled by the control center.

[0014] As another improved supplement of the present application, the L air guide hole is located above the compensation air hole, and the lower opening of the L air guide hole is located on the side of the sealing magnet away from the electromagnetic sheet.

[0015] In summary, through the setting of the gas collecting cover and the monitoring tube, the leaked gas can be collected when a leak occurs, so that the monitoring tube can quickly sense the leak. Compared with the existing technology, the leak can be detected in the early stage, and when the gas collected in the gas collecting cover is saturated, the air inlet and the air supply pipe can restore stable air supply again, which greatly reduces the impact of the leak on the fuel cell and effectively ensures the energy conversion efficiency of the fuel cell. In addition, under the setting of the gas change component, when a leak is detected, the gas change component can be triggered and the gas collecting cover can be inflated for gas compensation, thereby accelerating the saturation of the gas in the gas collecting cover, and further accelerating the speed of restoring the stability of the gas supply at the air inlet and the air supply pipe after the leak, thereby further reducing the impact of the leak on the energy conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the first embodiment of the present application when installed in a fuel cell for use;

[0017] Figure 2 This is a three-dimensional diagram of the first embodiment of the present application;

[0018] Figure 3 This is an exploded view of the first embodiment of the present application;

[0019] Figure 4 A half-cutaway perspective view of the first embodiment of the present application;

[0020] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0021] Figure 6 This is a diagram showing changes inside the monitoring tube before and after air leakage in the first embodiment of the present application;

[0022] Figure 7This is a cross-sectional view of a monitoring pipe according to a second embodiment of the present application;

[0023] Figure 8 This is a partial cross-sectional view of a monitoring tube according to a third embodiment of the present application;

[0024] Fig. 9 To compensate for the pores being closed Figure 7 Schematic diagram at B in the middle;

[0025] Fig.10 To compensate for the pores being open Figure 7 Schematic diagram at B in the middle;

[0026] Fig.11 This is the main principle block diagram of the third implementation method of this application.

[0027] Description of the numbers in the figure:

[0028] 101 air inlet, 102 air supply pipe, 2 pipe joints, 3 gas collecting cover, 31 top plate, 32 vertical pole, 4 monitoring tube, 41 tube body, 42 elastic telescopic rod, 43 push plate, 401 light sensor, 51 positioning ring, 52 sealing ring, 7 limit ring, 701 pressure sensor, 801 L air guide hole, 81 compensation air hole, 82 variable air ring groove, 83 sealing magnetic sheet, 84 elastic strip, 9 electromagnetic sheet, 10 gas storage cylinder. DETAILED DESCRIPTION

[0029] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-Figure 2 A methanol fuel cell testing device is shown, including a gas collecting cover 3, which is installed on the outside of the connection between the fuel cell's air inlet 101 and the air supply pipe 102 for external inflation, and the air inlet 101 and the air supply pipe 102 are connected by a pipe joint 2. A control center is installed on the gas collecting cover 3, and the control center signal is connected to a comparison module and an alarm, and the alarm is installed on the gas collecting cover 3.

[0032] like Figure 3 and Figure 4A gas leakage detection unit is arranged on the gas collecting outer cover 3, and the gas leakage detection unit includes a top plate 31, a plurality of vertical poles 32 fixedly connected between the lower end of the top plate 31 and the gas collecting outer cover 3, and a monitoring tube 4 fixedly passing through the gas collecting outer cover 3, the monitoring tube 4 includes a tube body 41, an elastic telescopic rod 42 movably passing through the tube body 41, a push plate 43 fixedly connected to the lower end of the elastic telescopic rod 42, and a light sensor 401 installed at the lower end of the push plate 43, the push plate 43 is completely fitted with the inner wall of the tube body 41, and the push plate 43 and the light sensor 401 are located on the inner side of the gas collecting outer cover 3, the light sensor 401 is connected to the control center signal, and the inner wall of the tube body 41 is also fixedly connected to a limit ring 7, and the limit ring 7 is located on the outer side of the gas collecting outer cover 3.

[0033] The portion of the tube body 41 located outside the gas collecting cover 3 is a hard transparent structure, and the portion of the tube body 41 located inside the gas collecting cover 3 is a hard non-transparent structure. When a leak occurs at the pipe joint 2 connecting the gas inlet 101 and the gas supply pipe 102, the gas leaks into the gas collecting cover 3 and is collected. Figure 6 As the amount of gas leakage increases, the air pressure increases. At this time, the elastic telescopic rod 42 is gradually squeezed and contracted, causing the push plate 43 to gradually move up. When it moves to the outside of the gas collecting cover 3, it overlaps with the transparent part of the tube body 41. At this time, external light can enter the monitoring tube 4, so that the light sensor 401 receives the light signal and feeds the generated data back to the control center. The control center can monitor the data changes through the comparison module, determine the gas leakage, and control the alarm to sound an alarm, so that the staff can take corresponding measures in time, effectively reducing the impact on the electric energy of the fuel cell.

[0034] In addition, as the amount of leaked gas increases, the collected gas in the gas collecting cover 3 gradually becomes saturated, the gas at the leaking point no longer leaks into the gas collecting cover 3, or the gas exchange between the gas collecting cover 3 and the gas inlet 101 is in a balanced state. At this time, the gas inlet 101 and the gas supply pipe 102 can restore the stable gas supply to the fuel cell. Compared with the prior art, the present device can not only detect whether there is a gas leak, but also eliminate the impact of the gas leak, thereby buying enough time for the staff to deal with the abnormality.

[0035] like Figure 4 and Figure 5A positioning ring 51 is fixedly connected to the outside of the air inlet 101, and a sealing ring 52 is arranged on the outer sleeve of the air inlet 101. One end of the air collecting cover 3 is in conflict with the sealing ring 52, and the other end of the air collecting cover 3 is fixedly connected to the air supply pipe 102, and the pipe joint 2 is fixed to the air supply pipe 102. The corresponding edges of the sealing ring 52 and the air collecting cover 3 are chamfered, and the cross-sectional slopes of the chamfers of the two are consistent. When the air supply pipe 102 with the pipe joint 2 and the air collecting cover 3 is connected to the air inlet 101, the chamfers of the air collecting cover 3 and the sealing ring 52 can be made to conflict with each other, thereby making the sealing between the two better. When leakage occurs, the gas collected in the air collecting cover 3 is not easy to leak from there, thereby effectively ensuring that after the leaked gas is collected in the air collecting cover 3 and reaches saturation, its stable state is not easy to be broken.

[0036] In the above-mentioned methanol fuel cell testing device, by setting the gas collecting cover 3 and the monitoring tube 4, the leaked gas can be collected when a gas leak occurs, so that the monitoring tube 4 can quickly sense the gas leak. Compared with the existing technology, the gas leak can be detected at the early stage, and when the gas collected in the gas collecting cover 3 is saturated, the air inlet 101 and the gas supply pipe 102 can restore the stable gas supply again, which greatly reduces the impact of the gas leak on the fuel cell and effectively ensures the energy conversion efficiency of the fuel cell.

[0037] The second implementation method:

[0038] This embodiment is based on the first embodiment, and a pressure sensor 701 is added, and the rest of the parts are consistent with the first embodiment.

[0039] Figure 7 As shown, two pressure sensors 701 are installed at the lower end of the limit ring 7, and the two pressure sensors 701 are connected to the control center signal. In this embodiment, when the gas leakage causes the push plate 43 to move up and squeeze the pressure sensor 701, so that it generates force data, at this time, as the amount of gas leakage increases, the force data on the pressure sensor 701 gradually increases. When the gas collected in the gas collecting cover 3 is saturated, the gas at the leaking point no longer leaks into the gas collecting cover 3, or the gas exchange between the gas collecting cover 3 and the air inlet 101 is in a balanced state. At this time, the data on the pressure sensor 701 tends to be stable, wherein the control center can monitor the data changes on the pressure sensor 701 through the comparison module. According to whether the pressure sensor 701 can be stable after generating the force data, it can be judged whether the gas supply to the fuel cell is restored to stability again. When the data on the pressure sensor 701 fluctuates again, it means that another gas leakage point may be generated again on the gas collecting cover 3 or the air inlet 101 and the air supply pipe 102. At this time, the alarm can be triggered to alarm for the second time, so that the staff can take corresponding measures in time, thereby ensuring the energy conversion efficiency of the fuel cell.

[0040] The third implementation method:

[0041] This embodiment adds a gas replenishing unit on the basis of the first embodiment or the second embodiment, and the rest of the embodiment is consistent with the first embodiment or the second embodiment.

[0042] Figure 8 , 9 11 shows that an air replenishing unit is also provided outside the monitoring tube 4, and the air replenishing unit includes a compensation air hole 81 drilled on the monitoring tube 4 and a gas cylinder 10 installed on the gas collecting outer cover 3, the gas cylinder 10 is communicated with the compensation air hole 81, and the gas cylinder 10 is filled with compressed air, and a gas changing component is provided at the compensation air hole 81, and the gas changing component is used to control the on-off between the gas cylinder 10 and the gas collecting outer cover 3, and an air changing ring groove 82 is drilled in the middle of the inner wall of the compensation air hole 81, and the air changing component includes an electromagnetic sheet 9 fixedly connected to the lower end of the push plate 43 and a sealing magnet 83 located in the air changing ring groove 82, and a plurality of elastic strips 84 are fixedly connected between the sealing magnet 83 and the inner wall of the air changing ring groove 82 away from the electromagnetic sheet 9, and an L air guide hole 801 is drilled in the monitoring tube 4, and the L air guide hole 801 is connected to the gas storage bottle 10 and the air changing ring groove 82.

[0043] When the push plate 43 and the pressure sensor 701 collide with each other, the electromagnetic sheet 9 is facing the compensation air hole 81, and the electromagnetic sheet 9 generates a magnetic repulsion force on the sealing magnet 83 after being energized. The on and off of the electromagnetic sheet 9 is controlled by the control center. The L air guide hole 801 is located above the compensation air hole 81, and the lower mouth of the L air guide hole 801 is located on the side of the sealing magnet 83 away from the electromagnetic sheet 9. When the electromagnetic sheet 9 is not energized, with the cooperation of the sealing magnet 83 and the elastic strip 84, it can act as a one-way valve, making it difficult for the gas in the gas storage bottle 10 to leak into the gas collecting cover 3. When a gas leak occurs, such as Fig.10 The control center can control the electromagnetic sheet 9 to be energized, and the magnetic repulsion generated by it can push the sealing magnet 83 to move closer to the side of the gas bottle 10, so that the lower mouth of the L gas guide hole 801 can be connected with the gas collecting outer cover 3. At this time, the gas in the gas bottle 10 can quickly enter the gas collecting outer cover 3, and the gas collecting outer cover 3 is compensated by gas, thereby accelerating the gas saturation state in the gas collecting outer cover 3, and then the gas supply stability of the gas inlet 101 and the gas supply pipe 102 can be restored faster after the gas leakage, further reducing the influence of the gas leakage on the fuel cell's power conversion efficiency.

[0044] In summary, through the setting of the gas collecting cover 3 and the monitoring tube 4, the leaked gas can be collected when a gas leak occurs, so that the monitoring tube 4 can quickly sense the gas leak. Compared with the prior art, the gas leak can be detected at the early stage, and when the gas collected in the gas collecting cover 3 is saturated, the gas inlet 101 and the gas supply pipe 102 can restore the stable gas supply again, which greatly reduces the impact of the gas leak on the fuel cell and effectively ensures the energy conversion efficiency of the fuel cell. In addition, under the setting of the gas change component, when a gas leak is detected, the gas change component can be triggered and the gas collecting cover 3 can be inflated for gas compensation, thereby accelerating the saturation of the gas in the gas collecting cover 3, and further accelerating the speed of restoring the gas supply stability of the gas inlet 101 and the gas supply pipe 102 after the gas leak, thereby further reducing the energy conversion efficiency affected by the gas leak.

[0045] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A methanol fuel cell testing device, comprising a gas collecting cover (3), the gas collecting cover (3) being installed outside the connection between the gas inlet (101) of the fuel cell and the gas supply pipe (102) for external inflation, the gas inlet (101) and the gas supply pipe (102) being connected via a pipe joint (2), characterized in that: A control center is installed on the gas collecting outer cover (3), and the control center signal is connected to a comparison module and an alarm. The alarm is installed on the gas collecting outer cover (3). A positioning ring (51) is fixedly connected to the outside of the gas inlet (101), and a sealing ring (52) is provided on the outer cover of the gas inlet (101). One end of the gas collecting outer cover (3) is in contact with the sealing ring (52), and the other end of the gas collecting outer cover (3) is fixedly connected to the gas supply pipe (102). A gas leakage detection unit is provided on the gas collecting outer cover (3), and the gas leakage detection unit includes a top plate (31), a plurality of vertical poles (32) fixedly connected between the lower end of the top plate (31) and the gas collecting outer cover (3), and a plurality of vertical poles (32) fixedly connected between the lower end of the top plate (31) and the gas collecting outer cover (3). and a monitoring tube (4) fixedly passing through the gas collecting outer cover (3), the monitoring tube (4) comprising a tube body (41), an elastic telescopic rod (42) movably passing through the tube body (41), a push plate (43) fixedly connected to the lower end of the elastic telescopic rod (42), and a light sensor (401) installed at the lower end of the push plate (43), the push plate (43) being completely fitted with the inner wall of the tube body (41), and the push plate (43) and the light sensor (401) being located on the inner side of the gas collecting outer cover (3), the light sensor (401) being connected to a control center signal, and the inner wall of the tube body (41) being fixedly connected to a limit ring (7), the limit ring (7) being located on the outer side of the gas collecting outer cover (3).

2. A methanol fuel cell testing device according to claim 1, characterized in that: The portion of the tube body (41) located outside the gas collecting outer cover (3) is a hard transparent structure, and the portion of the tube body (41) located inside the gas collecting outer cover (3) is a hard non-transparent structure.

3. A methanol fuel cell testing device according to claim 1, characterized in that: The corresponding edges of the sealing ring (52) and the gas collecting outer cover (3) are both chamfered, and the cross-sectional slopes of the chamfers are consistent.

4. A methanol fuel cell testing device according to claim 1, characterized in that: Two pressure sensors (701) are installed at the lower end of the limit ring (7), and both of the two pressure sensors (701) are connected to the control center signal.

5. A methanol fuel cell testing device according to claim 4, characterized in that: An air supply unit is also provided outside the monitoring tube (4), the air supply unit comprising a compensation air hole (81) drilled on the monitoring tube (4) and a gas storage bottle (10) installed on the gas collecting outer cover (3), the gas storage bottle (10) being in communication with the compensation air hole (81), and the gas storage bottle (10) being filled with compressed air, and a gas changing component being provided at the compensation air hole (81), the gas changing component being used to control the connection and disconnection between the gas storage bottle (10) and the gas collecting outer cover (3).

6. A methanol fuel cell testing device according to claim 5, characterized in that: A variable gas ring groove (82) is bored in the middle of the inner wall of the compensation air hole (81), the variable gas assembly comprises an electromagnetic plate (9) fixedly connected to the lower end of the push plate (43) and a sealing magnet (83) located in the variable gas ring groove (82), a plurality of elastic strips (84) are fixedly connected between the sealing magnet (83) and the inner wall of the variable gas ring groove (82) away from the electromagnetic plate (9), an L-type air guide hole (801) is bored in the monitoring tube (4), and the L-type air guide hole (801) is connected to the gas storage bottle (10) and the variable gas ring groove (82).

7. A methanol fuel cell testing device according to claim 6, characterized in that: When the push plate (43) and the pressure sensor (701) collide with each other, the electromagnetic sheet (9) faces the compensation air hole (81), and the electromagnetic sheet (9) generates a magnetic repulsive force on the sealing magnet (83) after being energized. The on and off of the electromagnetic sheet (9) is controlled by a control center.

8. A methanol fuel cell testing device according to claim 6, characterized in that: The L air guide hole (801) is located above the compensation air hole (81), and the lower opening of the L air guide hole (801) is located on a side of the sealing magnet (83) away from the electromagnetic sheet (9).

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