Microporous layer coating device for gas diffusion layer of fuel cell

Abstract

The utility model relates to the technical field of fuel cell production equipment, in particular to a microporous layer coating device for a gas diffusion layer of a fuel cell, which comprises a working table, a coating device and a coating device, the lifting beam is movably mounted on the stand column through a lifting mechanism; one end of the translation beam is movably mounted on the lifting beam through a first translation mechanism; the silk screen plate is arranged above the workbench and is fixedly connected to the lifting beam; the spraying mechanism is arranged on the translation beam; the adjusting beam is arranged above the silk screen plate, and the left end and the right end of the adjusting beam are connected to the translation beam through pressure adjusting mechanisms correspondingly; the scraper is arranged on one side of the spraying mechanism and fixedly connected to the adjusting beam. By arranging the adjusting beam and the pressure adjusting mechanisms at the two ends, the positions of the two ends of the scraper are consistent, so that the thickness of a coating is consistent, and the production quality of a gas diffusion layer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell production equipment, in particular to a microporous layer coating device for a fuel cell gas diffusion layer. Background Art

[0002] The gas diffusion layer of the fuel cell is composed of a hydrophobic layer and a microporous layer. The hydrophobic layer base material needs to have the ability to conduct electrons, a loose and porous structure that is easy for gas conduction, and water conductivity. Graphitized carbon paper, carbon fiber paper or graphitized carbon cloth are usually used as the main hydrophobic layer materials of the gas diffusion layer. Among them, carbon fiber paper is the most widely used. The microporous layer is mainly made of conductive carbon black that is evenly coated on the surface of the hydrophobic treated carbon fiber paper and then sintered and cured at high temperature. The coating methods include screen printing, electrostatic spinning, spray printing and coating film forming, among which screen printing is the most widely used. The microporous layer slurry is printed on the carbon fiber paper through the screen plate by doctor blade coating. The printing thickness of the microporous layer slurry can be controlled by adjusting the mesh size and thickness of the screen plate.

[0003] The Chinese utility model patent with publication number CN213042924U discloses a screen printing device for bonding bipolar plates of fuel cells, including a base, a plate positioning jig, a horizontal moving mechanism, a lifting mechanism, a clamping assembly and a silk screen. The plate positioning jig is horizontally arranged on the base, the silk screen is horizontally arranged above the plate positioning jig and is detachably connected to the clamping assembly, the clamping assembly is transmission-connected to the horizontal moving mechanism, and the horizontal moving mechanism is transmission-connected to the lifting mechanism arranged on the base. However, during the scraping process, due to inconsistent forces at both ends of the scraper, the scraper position is easily changed, which leads to different coating thicknesses. Utility Model Content

[0004] The utility model aims to provide a microporous layer coating device for a fuel cell gas diffusion layer to solve the problems raised in the background technology.

[0005] The above-mentioned object of the utility model is achieved through the following technical scheme: A microporous layer coating device for a fuel cell gas diffusion layer, comprising:

[0006] A workbench, one side of which is provided with a column;

[0007] A lifting beam, movably mounted on the column via a lifting mechanism;

[0008] a translation beam, one end of which is movably mounted on the lifting beam via a first translation mechanism;

[0009] A wire mesh plate, arranged above the workbench and fixedly connected to the lifting beam;

[0010] A spraying mechanism, arranged on the translation beam;

[0011] Also includes:

[0012] An adjusting beam is arranged above the wire mesh plate, and the left and right ends of the adjusting beam are respectively connected to the translation beam through a pressure adjusting mechanism;

[0013] The scraper is arranged on one side of the spraying mechanism and is fixedly connected to the adjusting beam.

[0014] Preferably, the pressure adjustment mechanism includes a driving element connected between the adjustment beam and the translation beam, a pressure member arranged on the driving element and moving with the adjustment beam, and a distance measuring element arranged on the moving path of the pressure member, and the distance measuring element is fixed on the translation beam.

[0015] Preferably, the distance measuring element comprises a micrometer, the measuring rod of the micrometer is arranged upward, and the pressing member is arranged above the micrometer and abuts against the measuring rod of the micrometer.

[0016] Preferably, the driving element comprises a cylinder, one end of which is fixed on the translation beam, and the other end of which is provided with a first connecting seat, a second connecting seat is provided on the adjustment beam, and the first connecting seat is hinged to the second connecting seat.

[0017] Preferably, the pressing member comprises a transverse mounting plate fixed to the movable end of the cylinder and a horizontal pressure plate arranged at one end of the transverse mounting plate, and the measuring rod of the micrometer presses against the horizontal pressure plate.

[0018] Preferably, the spraying mechanism includes a translation seat slidably mounted on the translation beam, a second translation mechanism driving the translation seat to move, a lifting seat moving up and down relative to the translation seat, a lifting element driving the lifting seat to move, and a spray head arranged on the lifting seat.

[0019] Preferably, the spray head is connected to a feeding mechanism, which includes a feeding box, a delivery pipe connected to the feeding box and the spray head, a stirring blade arranged in the feeding box, and a stirring motor driving the stirring blade to rotate.

[0020] Beneficial effects of the utility model:

[0021] 1. The utility model ensures that the positions of the two ends of the scraper are consistent by setting an adjustment beam and pressure adjustment mechanisms at both ends, thereby ensuring the consistency of the coating thickness and improving the production quality of the gas diffusion layer;

[0022] 2. The feeding mechanism is set up to realize automatic feeding of the spray head, thus improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of another viewing angle of an embodiment of the utility model;

[0025] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 It is a structural schematic diagram of the spraying mechanism in the embodiment of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the feeding mechanism in the embodiment of the utility model;

[0028] In the figure: 1-workbench, 2-column, 3-lifting beam, 4-lifting mechanism, 5-translation beam, 6-first translation mechanism, 7-wire screen, 8-spraying mechanism, 801-translation seat, 802-second translation mechanism, 803-lifting seat, 804-lifting element, 805-spraying head, 9-adjusting beam, 10-scraper, 11-pressure regulating mechanism, 1101-driving element, 1102-pressing piece, 11021-lateral mounting plate, 11022-horizontal pressing plate, 1103-distance measuring element, 1104-first connecting seat, 1105-second connecting seat, 12-feeding mechanism, 1201-feeding box, 1202-delivery pipe, 1203-feeding pump, 1204-stirring blade, 1205-stirring motor. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] This specific embodiment is merely an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it shall be protected by the patent law.

[0031] Example: Figure 1-5 As shown, a microporous layer coating device for a fuel cell gas diffusion layer includes: a workbench 1, a lifting beam 3, a translation beam 5, a spraying mechanism 8 and a scraper 10. A column 2 is provided on one side of the workbench 1. The lifting beam 3 is movably mounted on the column 2 through a lifting mechanism 4. The lifting mechanism 4 drives the lifting beam 3 to move up and down along the column 2.

[0032] One end of the translation beam 5 is movably mounted on the lifting beam 3 through a first translation mechanism 6 , and both the lifting beam 3 and the translation beam 5 are horizontally arranged relative to the workbench 1 .

[0033] The wire mesh plate 7 is arranged above the workbench 1 and is fixedly connected to the lifting beam 3. When the lifting beam 3 moves up and down, the wire mesh plate 7 moves together with the lifting beam 3.

[0034] The spraying mechanism 8 is arranged on the translation beam 5. Figure 4 As shown, the spraying mechanism 8 includes a translation seat 801 slidably mounted on the translation beam 5, a second translation mechanism 802 driving the translation seat 801 to move, a lifting seat 803 moving up and down relative to the translation seat 801, a lifting element 804 driving the lifting seat 803 to move, and a spray head 805 arranged on the lifting seat 803.

[0035] The lifting mechanism 4, the first translation mechanism 6 and the second translation mechanism 802 all adopt the screw lifting mechanism or the gear rack mechanism in the prior art, and the lifting element 804 adopts a conventional lifting cylinder or hydraulic cylinder.

[0036] The spray head 805 is connected to a feeding mechanism 12, such as Figure 5 As shown, the feeding mechanism 12 includes a feeding box 1201, a delivery pipe 1202 connected to the feeding box 1201 and the spray head, a stirring blade 1204 arranged in the feeding, and a stirring motor 1205 driving the stirring blade 1204 to rotate. The slurry in the feeding box 1201 is stirred by the stirring motor 1205 and the stirring blade 1204 to prevent the slurry from being stratified. The slurry is delivered to the spray head 805 through the delivery pipe 1202 by the feeding pump 1203 at the bottom for spraying.

[0037] An adjusting beam 9 is arranged above the screen plate 7 , and the left and right ends of the adjusting beam 9 are respectively connected to the translation beam 5 through a pressure adjusting mechanism 11 . A scraper 10 is arranged on one side of the spray head and fixedly connected to the adjusting beam 9 .

[0038] like Figure 3 As shown, the pressure regulating mechanism 11 includes a driving element 1101 connected between the regulating beam 9 and the translation beam 5, a pressing member 1102 arranged on the driving element 1101 and moving with the regulating beam 9, and a distance measuring element 1103 arranged on the moving path of the pressing member 1102, and the distance measuring element 1103 is fixed on the translation beam 5. The distance measuring elements 1103 and the driving element 1101 at the left and right ends of the regulating beam 9 are connected to the controller through the control circuit to ensure that the measurement data of the distance measuring elements 1103 at both ends are the same.

[0039] The driving element 1101 includes a cylinder, which is an existing slide cylinder. One end of the cylinder is fixed on the translation beam 5, and the other end is provided with a first connecting seat 1104. The adjusting beam 9 is provided with a second connecting seat 1105, and the first connecting seat 1104 and the second connecting seat 1105 are hinged.

[0040] The distance measuring element 1103 comprises a micrometer, the measuring rod of the micrometer is arranged upward, and the pressing member 1102 is arranged above the micrometer and presses against the measuring rod of the micrometer.

[0041] The pressing member 1102 includes a transverse mounting plate 11021 fixed to the movable end of the cylinder and a horizontal pressing plate 11022 arranged at one end of the transverse mounting plate 11021 , and the measuring rod of the micrometer is pressed against the horizontal pressing plate 11022 .

[0042] When the spraying mechanism 8 completes spraying, the adjustment beam 9 and the scraper 10 are moved downward to the set position through the driving element 1101 so that the readings of the micrometers at both ends are the same. At this time, the translation beam 5 is translated so that the scraper 10 scrapes the slurry flat to ensure that the slurry coating thickness on the workbench 1 is consistent.

Claims

1. A microporous layer coating device for a fuel cell gas diffusion layer, comprising: A workbench (1), wherein a column (2) is provided on one side of the workbench (1); A lifting beam (3) is movably mounted on the column (2) via a lifting mechanism (4); A translation beam (5), one end of which is movably mounted on the lifting beam (3) via a first translation mechanism (6); A wire mesh plate (7) arranged above the workbench (1) and fixedly connected to the lifting beam (3); A spraying mechanism (8) arranged on the translation beam (5); It is characterized by further comprising: An adjusting beam (9) is arranged above the wire mesh plate (7), and the left and right ends of the adjusting beam (9) are respectively connected to the translation beam (5) via a pressure adjusting mechanism (11); A scraper (10) is arranged on one side of the spraying mechanism (8) and is fixedly connected to the adjusting beam (9).

2. The microporous layer coating device for a fuel cell gas diffusion layer according to claim 1, characterized in that: The pressure regulating mechanism (11) comprises a driving element (1101) connected between the regulating beam (9) and the translation beam (5), a pressing member (1102) arranged on the driving element (1101) and moving following the regulating beam (9), and a distance measuring element (1103) arranged on the moving path of the pressing member (1102), wherein the distance measuring element (1103) is fixed on the translation beam (5).

3. The microporous layer coating device for a fuel cell gas diffusion layer according to claim 2, characterized in that: The distance measuring element (1103) comprises a micrometer, the measuring rod of the micrometer is arranged upward, and the pressing member (1102) is arranged above the micrometer and presses against the measuring rod of the micrometer.

4. A microporous layer coating device for a fuel cell gas diffusion layer according to claim 3, characterized in that: The driving element (1101) comprises a cylinder, one end of the cylinder is fixed on the translation beam (5), and the other end is provided with a first connecting seat (1104), the adjusting beam (9) is provided with a second connecting seat (1105), and the first connecting seat (1104) is hinged to the second connecting seat (1105).

5. The microporous layer coating device for a fuel cell gas diffusion layer according to claim 4, characterized in that: The pressing member (1102) comprises a transverse mounting plate (11021) fixed to the movable end of the cylinder and a horizontal pressing plate (11022) arranged at one end of the transverse mounting plate (11021), and the measuring rod of the micrometer is pressed against the horizontal pressing plate (11022).

6. The microporous layer coating device for a fuel cell gas diffusion layer according to claim 1, characterized in that: The spraying mechanism (8) comprises a translation seat (801) slidably mounted on the translation beam (5), a second translation mechanism (802) driving the translation seat (801) to move, a lifting seat (803) moving up and down relative to the translation seat (801), a lifting element (804) driving the lifting seat (803) to move, and a spraying head (805) arranged on the lifting seat (803).

7. The microporous layer coating device for a fuel cell gas diffusion layer according to claim 6, characterized in that: The spray head (805) is connected to a feeding mechanism (12), the feeding mechanism (12) comprising a feeding box (1201), a delivery pipe (1202) connected to the feeding box (1201) and the spray head, a stirring blade (1204) arranged in the feeding box, and a stirring motor (1205) for driving the stirring blade (1204) to rotate.

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