Membrane electrode packaging structure

Abstract

The utility model relates to the technical field of membrane electrode packaging, and discloses a membrane electrode packaging structure which comprises a first fixing plate, a second fixing plate is fixedly connected to the top of the first fixing plate, first grooves are formed between the first fixing plate and the second fixing plate, catalyst coating films are fixedly connected to the sides, away from each other, of the two first grooves, and the catalyst coating films are fixedly connected to the sides, away from each other, of the first fixing plate and the second fixing plate. A planar film electrode is fixedly connected between every two adjacent catalyst coating films, second grooves are formed in the peripheries of the adjacent portions of the first fixing plate and the second fixing plate, and filter screens are fixedly connected into the multiple second grooves. According to the utility model, gas flows into the device in a balanced manner through the air holes, the gas passes through the filter screen surrounding the groove II, impurities are filtered out, the purified gas is in contact with the catalyst coating film on the outer side of the groove I, the activity of the planar film electrode is improved, and the gas is subjected to electrochemical reaction and conversion from chemical energy to electric energy; therefore, the dielectric property is improved.

Description

Technical Field

[0001] This utility model relates to the field of membrane electrode packaging technology, and in particular to membrane electrode packaging structure. Background Technology

[0002] Membrane electrode assembly (MEA) is a core component of various fuel cells, including proton exchange membrane fuel cells and direct methanol fuel cells, and plays a crucial role in the performance of fuel cells. The proton exchange membrane only allows protons to pass through, while blocking the passage of electrons and reactant gases, thereby achieving charge separation and ion transport inside the cell and ensuring the normal operation of the fuel cell. To ensure its stable operation under complex conditions and achieve efficient energy conversion, an encapsulation structure that can effectively protect and support the MEA and optimize the gas and electron transport paths has emerged.

[0003] The bipolar plate material of the membrane electrode assembly (MEA) is made of graphite, metal, and composite materials. Graphite bipolar plates have good conductivity and corrosion resistance. Combining graphite with polymers improves mechanical properties and reduces costs. Because the bipolar plate flow channel is relatively narrow, during fuel cell operation, the reactant gas carries impurity particles. Once these impurity particles enter the flow channel, they accumulate in the narrow parts, causing flow channel blockage. Flow channel blockage prevents the reactant gas from smoothly reaching the MEA surface, resulting in uneven gas distribution, which in turn reduces electrochemical reaction efficiency and affects fuel cell performance. Existing technologies use various turbulence structures inside the flow channel. When the reactant gas flows through these turbulence structures, the airflow disturbances caused by the turbulence structures can form a local scouring effect within the flow channel, effectively reducing the deposition of impurity particles on the flow channel wall and reducing the possibility of flow channel blockage. However, in actual use, because the turbulence structures cannot completely filter impurities, impurities can still block the flow channel wall, leading to a decrease in dielectric properties. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a membrane electrode packaging structure, which aims to improve the problem in the prior art that the turbulence structure cannot completely filter impurities, and the flow channel wall will still be blocked by impurities, resulting in a decrease in dielectric performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a membrane electrode encapsulation structure, including a fixing plate 1, a fixing plate 2 fixedly connected to the top of the fixing plate 1, a groove 1 formed between adjacent fixing plates 1 and 2, a catalyst-coated membrane fixedly connected to the opposite side of two grooves 1, a planar membrane electrode fixedly connected between adjacent catalyst-coated membranes, grooves 2 formed around adjacent fixing plates 1 and 2, a filter screen fixedly connected inside the multiple grooves 2, multiple vent holes formed around the outer walls of the fixing plates 1 and 2, adhesive blocks fixedly connected around the top of the fixing plate 1, and mounting mechanisms provided on the front and rear sides of the top of the fixing plate 1, the mounting mechanisms being used to increase the connectivity of the fixing plates 1 and 2.

[0006] As a further description of the above technical solution:

[0007] The installation mechanism includes two fixed columns, the bottoms of which are fixedly connected to the front and rear sides of the top of the first fixed plate. The front and rear sides of the bottom of the second fixed plate are provided with slots, and the opposite sides of the two slots are provided with round holes. The opposite sides of the two fixed columns are fixedly connected with springs, and the opposite sides of the two springs are fixedly connected with clamping plates.

[0008] As a further description of the above technical solution:

[0009] A connecting plate is fixedly connected to the top of the second fixing plate, and a warning sign is fixedly connected to the top of the connecting plate.

[0010] As a further description of the above technical solution:

[0011] The bottom four corners of the second fixing plate are provided with positioning holes, and the top four corners of the first fixing plate are fixedly connected with positioning pins.

[0012] As a further description of the above technical solution:

[0013] Limiting plates are fixedly connected to the bottom perimeter of the first groove, and all of the limiting plates are of a smooth design.

[0014] As a further description of the above technical solution:

[0015] Two springs are fixedly connected to the opposite sides of the two circular holes, and compression columns are fixedly connected to the opposite sides of the two springs.

[0016] As a further description of the above technical solution:

[0017] Multiple ventilation holes are equidistantly opened around the top of the fixing plate, and the bottoms of multiple adhesive blocks are equidistantly fixed to the top of the fixing plate.

[0018] As a further description of the above technical solution:

[0019] The diameter of the two fixed posts is smaller than the diameter of the slot, and the diameter of the two clamping plates is smaller than the diameter of the circular hole.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, external gas flows into the device evenly through the vent holes evenly distributed on the outer walls of the first and second fixed plates. The gas passes through the filter screen in the surrounding grooves, where dust and impurities are filtered out. The purified gas comes into contact with the catalyst coating film on the outer side of the first groove. Under its special action, the activity of the planar film electrode is enhanced, and the gas undergoes an electrochemical reaction, converting chemical energy into electrical energy, thereby improving the dielectric properties.

[0022] 2. In this utility model, when the second fixing plate is pressed against the first fixing plate, the bottom groove corresponds to the top fixing post, and the groove gradually fits into the fixing post. The clamping plate is subjected to the reverse force of the groove, which compresses the first spring. As the second fixing plate continues to move downward, the clamping plate aligns with the round holes on both sides of the groove, and the first spring pushes the clamping plate into the round hole to form a lock. Even if the adhesive block is not sticky enough or is subjected to external force, the relative positions of the first and second fixing plates can be maintained, thereby ensuring the structural stability of the entire device. Attached Figure Description

[0023] Figure 1 This is a perspective view of the membrane electrode packaging structure proposed in this utility model;

[0024] Figure 2 This is a front view of the membrane electrode packaging structure proposed in this utility model;

[0025] Figure 3 This is a split view of the adhesive block of the membrane electrode encapsulation structure proposed in this utility model;

[0026] Figure 4 This is an exploded view of the positioning holes in the membrane electrode packaging structure proposed in this utility model;

[0027] Figure 5 This is an exploded view of the fixing post of the membrane electrode encapsulation structure proposed in this utility model.

[0028] Legend:

[0029] 1. Fixing plate one; 2. Mounting mechanism; 201. Fixing column; 202. Groove; 203. Round hole; 204. Spring one; 205. Clamping plate; 3. Fixing plate two; 4. Groove one; 5. Catalyst coating membrane; 6. Planar membrane electrode; 7. Groove two; 8. Filter screen; 9. Ventilation hole; 10. Adhesive block; 11. Connecting plate; 12. Warning sign; 13. Positioning hole; 14. Positioning pin; 15. Limiting plate; 16. Spring two; 17. Extrusion column. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 and Figure 3 An embodiment of this utility model provides a membrane electrode encapsulation structure, including a fixing plate 1, a fixing plate 3 fixedly connected to the top of the fixing plate 1, grooves 4 formed between adjacent fixing plates 1 and 3, catalyst coating membranes 5 fixedly connected to the opposite sides of the two grooves 4, planar membrane electrodes 6 fixedly connected between adjacent catalyst coating membranes 5, the catalyst coating membranes 5 increasing the activity of the catalytic planar membrane electrodes 6, grooves 7 formed around adjacent fixing plates 1 and 3, filter screens 8 fixedly connected inside the multiple grooves 7 for filtering impurities entering through vent holes 9, multiple vent holes 9 formed around the outer walls of the fixing plates 1 and 3, adhesive blocks 10 fixedly connected around the top of the fixing plate 1 for connecting the fixing plates 1 and 3, and mounting mechanisms 2 provided on the front and rear sides of the top of the fixing plate 1 for increasing the connectivity between the fixing plates 1 and 3.

[0032] Specifically, the top of the fixing plate 1 is fixedly connected to the fixing plate 3. The adjacent sides of the fixing plates 1 and 3 are provided with grooves 4. On the sides of the two grooves 4 that are far apart from each other, catalyst-coated membranes 5 are fixedly connected. Between the two catalyst-coated membranes 5, a planar membrane electrode 6 is tightly fixed. The catalyst-coated membrane 5 can greatly enhance the activity of the planar membrane electrode 6, thereby improving the overall performance. Grooves 7 are provided around the adjacent sides of the fixing plates 1 and 3. Filter screens 8 are fixedly connected inside these grooves 7. Multiple vent holes 9 are distributed around the outer walls of the fixing plates 1 and 3, allowing external gas to enter. The function of the filter screens 8 is to effectively filter impurities entering through the vent holes 9, ensuring internal cleanliness. Adhesive blocks 10 are provided around the top of the fixing plate 1. It is through these adhesive blocks 10 that the fixing plates 1 and 3 are firmly connected, ensuring the integrity and stability of the entire device structure.

[0033] Reference Figure 5 The installation mechanism 2 includes two fixing posts 201. The bottom of the two fixing posts 201 is fixedly connected to the front and rear sides of the top of the fixing plate 1. The bottom front and rear sides of the fixing plate 3 are provided with slots 202, which are aligned with the fixing posts 201. The opposite sides of the two slots 202 are provided with round holes 203. The opposite sides of the two fixing posts 201 are fixedly connected with springs 204. The opposite sides of the two springs 204 are fixedly connected with clamping plates 205. The fixing plate 3 presses the fixing plate 1, causing the clamping plates 205 to press the springs 204. The clamping plates 205 are aligned with the round holes 203. The springs 204 push the clamping plates 205 into the round holes 203 to lock them in place, preventing the adhesive block 10 from loosening when it is not sticky.

[0034] Specifically, two fixing posts 201 are vertically erected on the front and rear sides of the top of fixing plate 1, and their bottoms are firmly connected to fixing plate 1. The front and rear sides of the bottom of fixing plate 23 are provided with corresponding slots 202. During installation, the slots 202 need to be precisely aligned with the fixing posts 201. On the two sides of the slots 202 that are far apart from each other, there are round holes 203 respectively. On the side of the two fixing posts 201 that are far apart from each other, spring 204 is connected. The other end of spring 204 is fixed with a clamping plate 205. When assembling, fixing plate 23 is pressed towards fixing plate 1. At this time, clamping plate 205 will be subjected to a reverse force, which will compress spring 204 and make it contract. When clamping plate 205 is fully aligned with round hole 203, spring 204 will rebound and quickly push clamping plate 205 into round hole 203 to complete tight locking. This effectively prevents the loosening problem that may occur when connected by adhesive block 10 alone, and greatly improves the stability of the connection between fixing plate 1 and fixing plate 23.

[0035] Reference Figure 1 , Figure 3 and Figure 4 The top of the second fixing plate 3 is fixedly connected to the connecting plate 11, and the top of the connecting plate 11 is fixedly connected to the warning sign 12 to remind people to pay attention to safety. The four corners of the bottom of the second fixing plate 3 are provided with positioning holes 13. The four corners of the top of the first fixing plate 1 are fixedly connected to the positioning pins 14 to position the first fixing plate 1 and the second fixing plate 3 during installation. The bottom of the first bottom groove 4 is fixedly connected to the four sides of the bottom with limit plates 15. The multiple limit plates 15 are all rounded to prevent the catalyst coating film 5 and the planar film electrode 6 from being installed crookedly.

[0036] Specifically, the top of the fixing plate 2 3 is firmly connected to the connecting plate 11, and a warning sign 12 is erected on the top of the connecting plate 11 to remind users to pay attention to safety. The four corners of the bottom of the fixing plate 2 3 are respectively provided with positioning holes 13. Correspondingly, the four corners of the top of the fixing plate 1 are fixed with positioning pins 14. When installing the fixing plate 1 and the fixing plate 2 3, the positioning pins 14 cooperate with the positioning holes 13 to achieve precise positioning. The bottom of the bottom groove 1 4 is connected to the limiting plates 15 around its bottom. These limiting plates 15 are all designed with rounded edges to effectively prevent positional deviations when installing the catalyst coating film 5 and the planar film electrode 6, ensuring the accuracy and stability of the installation.

[0037] Reference Figure 5 Two springs 16 are fixedly connected to the opposite sides of the two round holes 203. Two pressing columns 17 are fixedly connected to the opposite sides of the two springs 16. Pressing the pressing column 17 compresses the spring and presses the clamping plate 205, so that the clamping plate 205 can be removed from the round hole 203. Multiple vent holes 9 are equidistantly opened around the top of the fixing plate 1. Multiple adhesive blocks 10 are equidistantly fixedly connected to the bottom of the top of the fixing plate 1. The diameter of the two fixing columns 201 is smaller than the diameter of the slot 202. The diameter of the two clamping plates 205 is smaller than the diameter of the round hole 203.

[0038] Specifically, on the side of the two circular holes 203 that are far apart from each other, spring 2 16 is fixedly connected to each other. The other end of spring 2 16 is connected to the compression column 17. When it is necessary to separate the fixing plate 1 and the fixing plate 2 3, simply press the compression column 17 to compress spring 2 16 and simultaneously compress the clamping plate 205, causing the clamping plate 205 to exit from the circular hole 203. Around the top of the fixing plate 1, multiple ventilation holes 9 are evenly distributed to provide good ventilation for the device. Around the top of the fixing plate 1, multiple adhesive blocks 10 are also evenly fixedly connected. The diameter of the two fixing columns 201 is smaller than the slot 202, and the diameter of the two clamping plates 205 is smaller than the circular hole 203, ensuring smooth docking during installation without hindering the locking and separating operations.

[0039] Working principle: External gas enters the device through the vents 9 on the outer walls of fixed plate 1 and fixed plate 3. The vents 9 are evenly distributed to ensure a balanced gas flow. The gas then reaches the filter screen 8 inside the groove 2. Since the groove 2 surrounds the adjacent sides of the fixed plate, the gas must pass through the filter screen 8. The filter screen 8 filters out dust, impurities, etc., from the gas. The purified gas continues to be transported inward to prevent impurities from damaging the internal components and to ensure the stable conduct of the electrochemical reaction. The purified gas then comes into contact with the catalyst coating film 5 on the outer side of the groove 4. The catalyst coating film 5 has a special composition and microstructure. The structure increases the contact area between the gas and itself, reduces the activation energy of the reaction, and accelerates the reaction rate. The planar membrane electrode 6 between the two catalyst coating films 5 has a significantly enhanced activity under its action. Under the catalysis of the catalyst coating film 5, the gas undergoes an electrochemical reaction on the planar membrane electrode 6, with electron and ion transfer, realizing the conversion of chemical energy into electrical energy and improving the dielectric performance of the device. The adhesive blocks 10 around the top of the fixed plate 1 tightly connect the fixed plate 1 and the fixed plate 2 3 with adhesiveness. The adhesive blocks 10 ensure that the relative positions of the two plates are fixed, ensuring that the gas can flow along the predetermined path and the electrochemical reaction can proceed stably.

[0040] Furthermore, the fixing plate 23 is brought closer to and pressed against the fixing plate 1. Since the slot 202 at the bottom of the fixing plate 23 corresponds to the fixing post 201 at the top of the fixing plate 1, as the pressing proceeds, the slot 202 gradually fits into the fixing post 201. The clamping plate 205 connected to the fixing post 201 will come into contact with the inner wall of the slot 202 of the fixing plate 23 and receive a reverse force from the slot 202. This force forces the clamping plate 205 to move inward toward the fixing post 201, thereby compressing the spring 204 connected to it. The spring 204 has elastic potential energy and continuously stores energy during the compression process. As the fixing plate 23 continues to press downward, when the clamping plate 205 moves to the slot 202... When the two circular holes 203 are fully aligned, the previously compressed spring 204 begins to release its stored elastic potential energy, generating an outward elastic force that pushes the locking plate 205. This elastic force pushes the locking plate 205 into the circular hole 203, forming a tight locking state. This locking structure serves as an auxiliary and reinforcing method for connecting the adhesive block 10, greatly enhancing the connection strength between the fixing plate 1 and the fixing plate 2. Even if the adhesive block 10 is not sticky enough, or if the device is subjected to external impact, vibration, or other factors that may cause it to loosen, the locking of the locking plate 205 and the circular hole 203 can still maintain the relative position of the fixing plate 1 and the fixing plate 2.3, ensuring the structural stability of the entire device.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A membrane electrode encapsulation structure, comprising a fixing plate (1), characterized in that: The top of the first fixing plate (1) is fixedly connected to the second fixing plate (3). The first fixing plate (1) and the second fixing plate (3) are both provided with grooves (4). The two grooves (4) are fixedly connected to the opposite side of each other. The two catalyst coating films (5) are fixedly connected to each other. The two catalyst coating films (5) are fixedly connected to each other. The two fixing plates (1) and the second fixing plate (3) are both provided with grooves (7) around their perimeter. The interior of each groove (7) is fixedly connected to a filter screen (8). The outer walls of the first fixing plate (1) and the second fixing plate (3) are provided with multiple vent holes (9). The top of the first fixing plate (1) is fixedly connected to a sticky block (10). The front and rear sides of the top of the first fixing plate (1) are provided with an installation mechanism (2). The installation mechanism (2) is used to increase the connectivity between the first fixing plate (1) and the second fixing plate (3).

2. The membrane electrode packaging structure according to claim 1, characterized in that: The installation mechanism (2) includes two fixed posts (201). The bottom of the two fixed posts (201) is fixedly connected to the front and rear sides of the top of the first fixed plate (1). The front and rear sides of the bottom of the second fixed plate (3) are provided with slots (202). The two slots (202) are provided with round holes (203) on the opposite sides. The two fixed posts (201) are fixedly connected with springs (204) on the opposite sides. The two springs (204) are fixedly connected with clamping plates (205) on the opposite sides.

3. The membrane electrode packaging structure according to claim 1, characterized in that: A connecting plate (11) is fixedly connected to the top of the fixing plate 2 (3), and a warning sign (12) is fixedly connected to the top of the connecting plate (11).

4. The membrane electrode packaging structure according to claim 1, characterized in that: The bottom four corners of the second fixing plate (3) are provided with positioning holes (13), and the top four corners of the first fixing plate (1) are fixedly connected with positioning pins (14).

5. The membrane electrode packaging structure according to claim 1, characterized in that: The bottom of the first groove (4) is fixedly connected to a limiting plate (15) around its bottom, and all of the limiting plates (15) are rounded.

6. The membrane electrode packaging structure according to claim 2, characterized in that: Two springs (16) are fixedly connected to the opposite sides of the two circular holes (203), and two compression columns (17) are fixedly connected to the opposite sides of the two springs (16).

7. The membrane electrode packaging structure according to claim 1, characterized in that: Multiple ventilation holes (9) are equidistantly opened around the top of the fixing plate (1), and the bottoms of multiple adhesive blocks (10) are equidistantly fixed around the top of the fixing plate (1).

8. The membrane electrode packaging structure according to claim 2, characterized in that: The diameter of the two fixed posts (201) is smaller than the diameter of the slot (202), and the diameter of the two clamping plates (205) is smaller than the diameter of the round hole (203).

Images