CN205642757U - Fuel cell polar plate leak hunting device - Google Patents

Abstract

The utility model discloses a fuel cell pole plate leak detection device, which comprises a fast fastening device and a leak detection mold. The fast fastening device includes an upper fixing plate, a pressing plate, a lower fixing plate and a cylinder. The guide rail columns arranged at the four corners of the upper and lower fixing plates are fixedly connected with the lower fixing plate, and there is a pressing plate between the upper fixing plate and the lower fixing plate, and the upper side of the pressing plate is socketed on the guiding rail column. The spring is provided with a pressure sensor in the middle of the bottom of the pressing plate, the cylinder is arranged in the middle of the top of the upper fixing plate, and there are multiple leak detection molds, which are stacked between the pressing plate and the lower fixing plate. The utility model has a stable structure, simple fixing of the detection mold and the bipolar plate, easy operation, little damage to each part, and long service life.

Description

A fuel cell plate leak detection device

technical field

The utility model relates to the technical field of fuel cells, in particular to a fuel cell polar plate leak detection device.

Background technique

Polymer electrolyte membrane fuel cell is a device that directly converts the chemical energy of hydrogen into electrical energy. It has the advantages of high efficiency, low noise, and zero pollution, and is playing an increasingly important role in today's society. Polymer electrolyte membrane fuel cells usually need to assemble multiple single cells in series to form a stack. The main components include bipolar plates, membrane electrodes, end plates and fasteners, among which the bipolar plates and membrane electrodes Gas leakage determines the performance and life of polymer electrolyte membrane fuel cell stacks. Therefore, how to detect gas leakage of membrane electrodes conveniently, quickly and on a large scale is very important. The traditional membrane electrode leak detection device is put together by fastening bolts and leak detection molds for leak detection. The degree of automation is not high, and it is purely manual operation, which wastes time and is inefficient, which is not conducive to the development of fuel cell industrialization. Later, a stacked leak detection device was derived, which can improve the efficiency of leak detection, but this kind of leak detection device has poor stability, and it is inconvenient to fix the leak detection mold and bipolar plate, which affects the leak detection efficiency and is easy to cause damage to various components , short service life.

Utility model content

The purpose of this utility model is to provide a fuel cell plate leak detection device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A fuel cell plate leak detection device, including a quick fastening device and a leak detection mold, the fast fastening device includes an upper fixing plate, a pressure plate, a lower fixing plate and a cylinder, and the upper fixing plate is arranged on the upper The guide rail columns at the four corners of the fixed plate and the lower fixed plate are fixedly connected with the lower fixed plate. A pressing plate is arranged between the upper fixed plate and the lower fixed plate. The pressing plate slides along the guide rail column. Springs are socketed on the columns, one end of the spring is fixed on the upper fixing plate, the other end of the spring is fixed on the pressure plate, a pressure sensor is installed in the middle of the bottom of the pressure plate, and the cylinder is set on the top of the upper fixing plate In the middle position, the piston rod of the cylinder extends to the lower side of the upper fixing plate. There are multiple leak detection molds stacked between the pressure plate and the lower fixing plate. The leak detection mold includes an upper mold plate and a lower mold plate. The inner side of the mold upper plate is evenly provided with a plurality of upper poles, and the inner side of the mold lower plate is evenly equipped with a plurality of lower elastic telescopic rods, and the ends of the upper poles and the lower elastic telescopic rods are provided with support blocks. The upper mold plate and the lower mold plate are pressed together to form a closed cavity, and the bipolar plate is arranged between the upper mold plate and the lower mold plate to divide the closed cavity into an independent upper cavity and a lower cavity. Air inlet holes are arranged on the side wall of the lower plate, and air outlet holes are arranged on the side wall of the upper plate of the mold, and the air outlet holes are connected with an airtight leak detector.

As a further solution of the utility model: the pressure sensor is electrically connected to the pressure gauges located on the left and right sides of the top of the upper fixing plate and the PLC controller respectively, and the PLC controller is also electrically connected to the cylinder and the airtight leak detector respectively.

As a further solution of the utility model: the end of the piston rod of the cylinder and the middle position of the top of the pressure plate are provided with a wear-resistant layer.

As a further solution of the utility model: the lower side of the leak detection mold is provided with a layer of hard rubber pad on the lower fixing plate.

As a further solution of the present utility model: the number of the upper support rod and the lower elastic telescopic rod are the same, and there is a one-to-one correspondence.

As a further solution of the present invention: the inner wall interfaces of the upper mold plate and the lower mold plate are respectively provided with stepped surfaces, and the upper and lower stepped surfaces jointly form a groove matching the edge of the bipolar plate, and a sealing gasket is arranged in the groove. The surroundings of the bipolar plate are arranged in the groove and sealed by a gasket.

Compared with the prior art, the utility model has the beneficial effects that: the leak detection mold can be protected by the hard rubber pad, the pressure detection can be carried out by the pressure sensor, and the pressure detected by the pressure sensor can be intuitively displayed by the pressure gauge, which is convenient for checking The parameters of the cylinder are adjusted, and the bipolar plate can be elastically supported and fixed through the cooperation of the upper support rod and the lower elastic telescopic rod, and the length of the upper support rod is fixed, the bipolar plate is relatively stable, and the accuracy of airtight leak detection can be improved. The piston rod and the pressure plate are movable connections, which can reduce the torsional friction between the pressure plate and the guide rail column, and after the leak detection is completed, the cylinder returns to the original position, and the pressure plate can also return to the original position under the elastic force of the spring, which is simple and convenient. As mentioned above, the structure of the device is stable, the fixing of the detection mold and the bipolar plate is relatively simple, easy to operate, the damage of each component is small, and the service life is long.

Description of drawings

Fig. 1 is a schematic structural view of the quick fastening device of the present invention.

Fig. 2 is a structural schematic diagram of the leak detection mold of the present invention.

In the figure: 1-pressure gauge, 2-upper fixing plate, 3-spring, 4-pressure plate, 5-rail column, 6-lower fixing plate, 7-hard rubber pad, 8-leak detection mold, 9-pressure sensor , 10-PLC controller, 11-cylinder, 12-mold upper plate, 13-mold lower plate, 14-intake hole, 15-air outlet, 16-sealing gasket, 17-bipolar plate, 18-upper rod , 19-support block, 20-lower elastic telescopic rod, 21-upper cavity, 22-lower cavity.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figures 1-2. In an embodiment of the utility model, a fuel cell plate leak detection device includes a quick fastening device and a leak detection mold 8. The fast fastening device includes an upper fixing plate 2, a pressure plate 4, The lower fixed plate 6 and the cylinder 11, the upper fixed plate 2 is fixedly connected with the lower fixed plate 6 through four guide rail posts 5 arranged at four corners of the upper fixed plate 2 and the lower fixed plate 6, and the upper fixed plate 2 and the lower fixed plate 6 is provided with a pressure plate 4, the pressure plate 4 slides along the guide rail column 5, the upper side of the pressure plate 4 is sleeved on the guide rail column 5 with a spring 3, and one end of the spring 3 is fixed on the upper fixed plate 2, the other end of the spring 3 is fixed on the pressure plate 4, and the pressure plate 4 is elastically supported by the spring 3. A pressure sensor 9 is provided at the middle of the bottom of the pressure plate 4, and the pressure detection is performed through the pressure sensor 9. The pressure sensor 9 are respectively electrically connected to the pressure gauge 1 and the PLC controller 10 located on the left and right sides of the top of the upper fixing plate 2, and the pressure gauge 1 visually displays the pressure detected by the pressure sensor 9, and the PLC controller 10 is also electrically connected to the cylinder 11. connected, the PLC controller 10 automatically controls the cylinder 11 according to the pressure detected by the pressure sensor 9, the cylinder 11 is arranged at the top middle position of the upper fixing plate 2, and the piston rod of the cylinder 11 extends to the lower side of the upper fixing plate 2 , and the end of the piston rod of the cylinder 11 and the top middle of the pressure plate 4 are provided with a wear-resistant layer, and the movement of the cylinder 11 is controlled to push the pressure plate 4 to fix the leak detection mold 8. The leak detection mold 8 is provided with multiple, stacked between the pressure plate 4 and the lower fixed plate 6, the lower side of the leak detection mold 8 is provided with a layer of hard rubber pad 7 on the lower fixed plate 6, through the hard rubber pad 7 pair Leak detection mold 8 is protected.

The leak detection mold 8 includes a mold upper plate 12 and a mold lower plate 13, the inner side of the mold upper plate 12 is evenly provided with a plurality of upper poles 18, and the inner side of the mold lower plate 13 is evenly provided with a plurality of lower elastic telescopic rods 20, The number of upper struts 18 and lower elastic telescopic rods 20 is the same, and there is a one-to-one correspondence. The ends of the upper struts 18 and the lower elastic telescopic rods 20 are all provided with support blocks 19, through which the upper struts 18 pair of bipolar plates 17 is supported and fixed, and the bipolar plate 17 is elastically supported by the lower elastic telescopic rod 20. The mold upper plate 12 and the mold lower plate 13 are pressed together to form a closed cavity, and the mold upper plate 12 and the mold lower plate 13 The inner wall interface is respectively provided with stepped surfaces, and the upper and lower stepped surfaces together form a groove matching the edge of the bipolar plate 17. A gasket 16 is arranged in the groove, and the bipolar plate 17 is arranged between the upper mold plate 12 and the lower mold plate 13. In between, the surrounding of the bipolar plate 17 is set in the groove and sealed by the gasket 16, and the airtight cavity is divided into an independent upper cavity 21 and a lower cavity 22, and the side wall of the lower plate 13 of the mold is provided with an advanced An air hole 14, an air outlet 15 is arranged on the side wall of the mold upper plate 12, the air outlet 15 is connected to the airtight leak detector, and the PLC controller 10 is electrically connected to the airtight leak detector.

The working principle of the utility model is: put the bipolar plate to be detected in the leak detection mold 8, place the leak detection mold 8 between the pressure plate 4 and the lower fixed plate 6, set parameters in the PLC controller 10, and control The cylinder 11 moves, the piston rod of the cylinder 11 pushes the pressure plate 4 to reach the designated position, and presses the leak detection mold 8. The hard rubber pad 7 can protect the leak detection mold 8, and the pressure sensor 9 is used for pressure detection. The pressure gauge 1 intuitively displays the pressure detected by the pressure sensor 9, which is convenient for parameter adjustment of the cylinder 11. Gas is injected into the leak detection mold 8 from the air inlet 14 to the set pressure, and the air outlet of the leak detection mold 8 is closed. 15 is connected to the airtight leak detector, and after a period of time, the air leakage rate of the bipolar plate 17 is read, and the air leakage rate is transmitted to the PLC controller 10, and the detected bipolar plate 17 is determined according to the parameters set by the PLC controller 10. Whether the air leakage rate of the plate 17 is qualified. In addition, the bipolar plate 17 can be elastically supported and fixed through the cooperation of the upper support rod 18 and the lower elastic telescopic rod 20, and the length of the upper support rod 18 is fixed, which can improve the accuracy of airtight leak detection. The piston rod of the cylinder 11 and the pressure plate 4 are movably connected, which can reduce the torsional friction between the pressure plate 4 and the guide rail column 5, and after the leak detection is completed, the cylinder 11 returns to its original position, and the pressure plate 4 is also under the elastic force of the spring 3. It can be restored to its original position, simple and convenient.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (6)

1. null1. a fuel battery pole board leakage detection apparatus，Including fast fixture device and leak detection mould，It is characterized in that，Described fast fixture device includes upper mounted plate、Pressing plate、Bottom plate and cylinder，Fixed plate is connected by the guide rail column at four four angles being arranged on upper mounted plate and bottom plate and bottom plate are fixing，It is provided with pressing plate between fixed plate and bottom plate，Pressing plate slides along guide rail column，The upside of described pressing plate all sets on guide rail column are equipped with spring，One end of spring is fixed on upper mounted plate，The other end of spring is fixed on pressing plate，The centre position, bottom of described pressing plate is provided with pressure transducer，Described cylinder is located at the crown center position of upper mounted plate，The piston rod of cylinder extends to the downside of upper mounted plate，Described leak detection mould is provided with multiple，Stacking is positioned between pressing plate and bottom plate，Described leak detection mould includes mould upper plate and mould lower plate，The inner side of mould upper plate is uniformly provided with multiple upper rack posts，The inner side of mould lower plate is uniformly provided with multiple lower elastic telescopicing rod，The end of described upper rack posts and lower elastic telescopicing rod is equipped with a bracer，Described mould upper plate and mould lower plate form airtight cavity after coordinating compression，Bipolar plates is arranged between mould upper plate and mould lower plate，Airtight cavity is divided into independent upper cavity and lower chamber，It is provided with air inlet on the sidewall of described mould lower plate，It is provided with venthole on the sidewall of described mould upper plate，Venthole is connected with airtight leak detector.
2. Fuel battery pole board leakage detection apparatus the most according to claim 1, it is characterized in that, described pressure transducer electrically connects with the Pressure gauge being positioned at the left and right sides, upper mounted plate top and PLC respectively, and described PLC electrically connects with cylinder and airtight leak detector the most respectively.
3. Fuel battery pole board leakage detection apparatus the most according to claim 1, it is characterised in that the piston rod end of described cylinder and the crown center position of pressing plate are equipped with wearing layer.
4. Fuel battery pole board leakage detection apparatus the most according to claim 1, it is characterised in that the downside of described leak detection mould is provided with one layer of vulcanie pad in bottom plate.
5. 5. according to the fuel battery pole board leakage detection apparatus described in claim 1 or 4, it is characterised in that described upper rack posts is identical with the quantity of lower elastic telescopicing rod, and one_to_one corresponding.
6. 6. according to the fuel battery pole board leakage detection apparatus described in claim 1 or 4, it is characterized in that, the inwall seam of described mould upper plate and mould lower plate is respectively arranged with step surface, up/down steps face collectively forms and the groove of bipolar plates edge matching, being provided with sealing gasket in groove, the surrounding of bipolar plates is arranged and is sealed by sealing gasket in a groove.