Device for laminating gas diffusion layer of membrane electrode of fuel cell

Abstract

The utility model discloses a device for laminating a gas diffusion layer of a membrane electrode of a fuel cell. The device comprises an adsorption platform, an adsorption plate and a proton exchange membrane clamping plate, according to the device for laminating the membrane electrode gas diffusion layer of the fuel cell, through the design of the proton exchange membrane clamping plates, the proton exchange membrane is clamped and fixed between the upper clamping plate and the lower clamping plate, after catalyst layers are sprayed on the two sides, the proton exchange membrane, the upper clamping plate and the lower clamping plate are placed on the adsorption platform with the adsorption plate together, and after positioning, the membrane electrode gas diffusion layer is laminated. The gas diffusion layer is directly attached, the proton exchange membrane clamping plate does not need to be dismantled after the catalyst layer is sprayed, time is saved, and meanwhile possible damage to the proton exchange membrane in the dismantling and installing process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to a device for laminating a fuel cell membrane electrode gas diffusion layer. Background Art

[0002] The structure of the five-in-one fuel cell membrane electrode (MEA) includes a proton membrane, a catalyst layer located on both sides of the proton membrane, and a gas diffusion layer (GDL) located outside the catalyst layers on both sides.

[0003] In the prior art, the process flow for preparing a five-in-one fuel cell membrane electrode is: first, the three-in-one frame proton membrane is bonded, then the three-in-one clamp is placed, then the catalyst layer is sprayed, the clamp is removed, and finally the GDL is bonded.

[0004] The existing spraying fixture is very inconvenient to disassemble, which wastes a lot of manpower and time. In addition, the MEA is easily deformed and damaged during the continuous process of clamping. After the fixture is removed, the MEA loses tension and is prone to deformation, which affects the subsequent GDL fitting accuracy.

[0005] For example, the utility model with the authorization announcement number CN219246723U discloses a membrane electrode dispensing and bonding platform, including an operating table, the upper end surface of which is set as an operating plane. A fixed plate is set on the operating plane, a patch base plate is set on the upper end of the fixed plate, the patch base plate runs back and forth on the fixed plate, the patch base plate is a hollow structure, vacuum interfaces are set at two points of the patch base plate, a plurality of vacuum adsorption holes are set on the upper end surface of the patch base plate, positioning pins are set at the four corners of the patch base plate, a plurality of vacuum suction holes are also set on the operating plane, and limit columns are set on both sides of the operating plane. Utility Model Content

[0006] In view of the above-mentioned deficiencies in the prior art, the present application provides a device for bonding the gas diffusion layer of the membrane electrode of a fuel cell, which eliminates the step of disassembling the fixture after spraying and directly uses a complete set of fixture devices to complete the two steps of spraying and GDL bonding, thereby avoiding damage to the MEA during the process of disassembling and assembling the fixture.

[0007] A device for bonding a fuel cell membrane electrode gas diffusion layer, comprising:

[0008] The adsorption platform comprises a base and an adsorption module located on the top surface of the base, wherein the adsorption module has a plurality of first adsorption holes for negative pressure adsorption;

[0009] An adsorption plate, having a first positioning mechanism between the adsorption platform and the adsorption platform, wherein the top surface of the adsorption plate has a placement groove for accommodating and positioning the gas diffusion layer to be bonded, and the bottom surface of the placement groove has a plurality of second adsorption holes that cooperate with the first adsorption holes and are used for negative pressure adsorption;

[0010] The proton exchange membrane clamp comprises an upper clamp and a lower clamp, the proton exchange membrane is clamped and fixed between the upper clamp and the lower clamp, the upper clamp and the lower clamp are provided with avoidance holes for avoiding the sprayed catalytic layer on both sides of the proton exchange membrane and the bonding area with the gas diffusion layer, and a second positioning mechanism is provided between the proton exchange membrane clamp and the adsorption platform and / or between the adsorption plates.

[0011] Preferably, the adsorption platform comprises one or more adsorption modules.

[0012] Correspondingly, the proton exchange membrane clamping plate is simultaneously clamped and fixed with the same number of proton exchange membranes as the adsorption modules.

[0013] The adsorption plate includes the same number of placement slots as the adsorption modules. When the number of the placement slots is multiple, each placement slot is a separate adsorption plate or the placement slots are arranged on the same adsorption plate.

[0014] Preferably, the first positioning mechanism includes a first positioning column provided on the top surface of the adsorption module and a first positioning hole provided on the bottom surface of the adsorption plate and cooperating with the first positioning column.

[0015] Preferably, the second positioning mechanism is provided between the proton exchange membrane clamping plate and the adsorption platform.

[0016] More preferably, the second positioning mechanism includes a second positioning column provided on the base and a second positioning hole provided on the proton exchange membrane clamping plate and cooperating with the second positioning column.

[0017] Further preferably, the second positioning hole is provided on the lower clamping plate.

[0018] The utility model relates to a device for bonding a fuel cell membrane electrode gas diffusion layer. Through the design of a proton exchange membrane clamp, the proton exchange membrane is clamped and fixed between an upper clamp and a lower clamp. After the catalyst layer is sprayed on both sides, the proton exchange membrane is placed together with the upper clamp and the lower clamp on an adsorption platform with an adsorption plate. After positioning, the gas diffusion layer is directly bonded. There is no need to remove the proton exchange membrane clamp after spraying the catalyst layer. This saves time and avoids possible damage to the proton exchange membrane during the disassembly and assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a schematic diagram of the assembly structure of the device for bonding the membrane electrode gas diffusion layer of the fuel cell.

[0020] Figure 2 The exploded structure schematic diagram of the device for bonding the membrane electrode gas diffusion layer of the fuel cell of the utility model is shown.

[0021] Figure 3 Schematic diagram of the structure of the adsorption platform.

[0022] Figure 4 Schematic diagram of the structure of the adsorption plate.

[0023] Figure 5 This is a schematic diagram of the structure of the adsorption plate from another perspective.

[0024] Figure 6 Schematic diagram of the structure of the proton exchange membrane splint.

[0025] Figure 7 This is a schematic structural diagram of the proton exchange membrane splint from another perspective.

[0026] Reference numerals:

[0027] Adsorption platform 1, base 11, adsorption module 12, first adsorption hole 13, first positioning column 14, second positioning column 15, support column 16,

[0028] Adsorption plate 2, placement groove 21, second adsorption hole 22, first positioning hole 23,

[0029] Proton exchange membrane clamping plate 3 , upper clamping plate 31 , lower clamping plate 32 , avoidance hole 33 , avoidance hole 34 , second positioning hole 35 , fixing hole 36 , fixing hole 37 . DETAILED DESCRIPTION

[0030] like Figures 1 to 7 As shown, a device for bonding a fuel cell membrane electrode gas diffusion layer includes an adsorption platform 1, an adsorption plate 2 and a proton exchange membrane clamp 3.

[0031] like Figures 1 to 3 As shown, the adsorption platform 1 includes a base 11 and an adsorption module 12 located on the top surface of the base 11, and the adsorption module 12 has a plurality of first adsorption holes 13 for negative pressure adsorption. The adsorption module 12 has a cavity for pumping negative pressure inside, and when in use, the adsorption module 12 needs to be connected to a device for pumping negative pressure. A negative pressure pumping port (not shown in the figure) can be provided on the bottom or side of the adsorption module 12, and the negative pressure pumping port is connected to the cavity inside the adsorption module 12, and is connected to the negative pressure pumping device externally.

[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the adsorption plate 2 is a plate-like structure, and the top surface of the adsorption plate 2 has a placement groove 21 for accommodating and positioning the gas diffusion layer to be bonded, and the bottom surface of the placement groove 21 has a plurality of second adsorption holes 22 that cooperate with the first adsorption holes 13 and are used for negative pressure adsorption.

[0033] There is a first positioning mechanism between the adsorption plate 2 and the adsorption platform 1, and the first positioning mechanism is used to position the adsorption plate 2 on the adsorption platform 1, so that the second adsorption hole 22 on the adsorption plate 2 can be connected to the first adsorption hole 13 on the adsorption module 12. The second adsorption hole 22 and the first adsorption hole 13 do not have to be strictly one-to-one corresponding and consistent in size, as long as they can achieve a negative pressure adsorption effect. Of course, the preferred embodiment is that the size and position of each second adsorption hole 22 and the first adsorption hole 13 correspond one-to-one.

[0034] In a preferred embodiment, the first positioning mechanism includes a first positioning column 14 provided on the top surface of the adsorption module 12 and a first positioning hole 23 provided on the bottom surface of the adsorption plate 2 and cooperating with the first positioning column 14. A first positioning column 14 is provided at each of the four corners of the top surface of the adsorption module 12, and correspondingly, a first positioning hole 23 is provided at each of the four corners of the bottom surface of the adsorption plate 2. The first positioning hole 23 is preferably a blind hole, so that the top surface of the adsorption module 12 can be kept flat, and there will be no air leakage from the first positioning hole 23 during negative pressure adsorption.

[0035] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the proton exchange membrane clamping plate 3 includes an upper clamping plate 31 and a lower clamping plate 32, and the proton exchange membrane is clamped and fixed between the upper clamping plate 31 and the lower clamping plate 32. The upper clamping plate 31 and the lower clamping plate 32 are provided with avoidance holes for avoiding the spraying catalytic layer on both sides of the proton exchange membrane and the bonding area with the gas diffusion layer, wherein the upper clamping plate 31 is provided with avoidance holes 33, and the lower clamping plate 32 is provided with avoidance holes 34, and the avoidance holes 33 and the avoidance holes 34 are provided correspondingly and have the same size.

[0036] There are also fixing holes between the upper clamping plate 31 and the lower clamping plate 32 after clamping, wherein the upper clamping plate 31 is provided with fixing holes 36, and the lower clamping plate 32 is provided with fixing holes 37. The fixing holes are arranged at the four corners of the upper clamping plate 31 and the lower clamping plate 32, and the fixing holes 36 correspond to the fixing holes 37 one by one. The upper clamping plate 31 and the lower clamping plate 32 are fixed by using matching bolts and nuts at the fixing holes. Alternatively, if the fixing holes have internal threads, screws can be used for fixing.

[0037] There is a second positioning mechanism between the proton exchange membrane clamp 3 and the adsorption platform 1 and / or between the adsorption plates 2. In a preferred embodiment, the second positioning mechanism is arranged between the proton exchange membrane clamp 3 and the adsorption platform 1. The second positioning mechanism includes a second positioning column 15 provided on the base 11 and a second positioning hole 35 provided on the proton exchange membrane clamp and cooperating with the second positioning column 15. Among them, the second positioning hole 35 is provided on the lower clamp 32, and the second positioning hole 35 is a blind hole, and the blind hole design does not affect the clamping surface between the upper clamp 31 and the lower clamp 32. The second positioning columns 15 are four arranged at the four corners of the base 11, and correspondingly, the second positioning holes 35 are four arranged at the four corners of the bottom surface of the lower clamp 32.

[0038] In a preferred embodiment, a support column 16 is provided at each of the four corners of the base 11, and a second positioning column 15 is provided on the top surface of each support column 16. Since the adsorption module 12 is higher than the base 11, if the second positioning column 15 is directly provided on the base 11, and the second positioning column 15 is thin, the strength of the second positioning column 15 may be poor, while the support column 16 is provided first, and then the second positioning column 15 is provided on the top surface of the support column 16, the support column 16 can be provided to be thicker, so that the strength can be ensured.

[0039] The adsorption platform 1 includes one or more adsorption modules 12. Accordingly, the proton exchange membrane clamping plate 3 simultaneously clamps and fixes a number of proton exchange membranes that is the same as the number of the adsorption modules 12. The adsorption plate 2 includes the same number of placement slots 21 as the adsorption modules 12. When the number of placement slots 21 is multiple, each placement slot 21 is a separate adsorption plate 2 or each placement slot 21 is arranged on the same adsorption plate 2.

[0040] In the embodiment shown in the figure, the adsorption platform 1 includes two adsorption modules 12, and the upper clamping plate 31 and the lower clamping plate 32 of the proton exchange membrane clamping plate 3 are each provided with two avoidance holes for clamping and fixing two proton exchange membranes at the same time. The adsorption plates 2 include two, and each adsorption plate 2 is provided with a placement groove 21.

[0041] When the utility model is used for bonding the gas diffusion layer of the membrane electrode of the fuel cell, the upper clamping plate 31 and the lower clamping plate 32 are first used to clamp and fix the proton exchange membrane, and then the catalytic layer is sprayed on both sides of the proton exchange membrane through the avoidance hole 33 on the upper clamping plate 31 and the avoidance hole 34 on the lower clamping plate 32; the adsorption plate 2 is positioned on the adsorption module 21 of the adsorption platform 1, the negative pressure is turned on, and the gas diffusion layer to be bonded is negatively adsorbed on the adsorption plate 2; then the proton exchange membrane is placed together with the upper clamping plate 31 and the lower clamping plate 32 on the adsorption platform 1 with the adsorption plate 2, and after positioning, the gas diffusion layer is directly bonded; after the bonding is completed, the other side is replaced for bonding.

Claims

1. A device for bonding a fuel cell membrane electrode gas diffusion layer, characterized in that: include: The adsorption platform comprises a base and an adsorption module located on the top surface of the base, wherein the adsorption module has a plurality of first adsorption holes for negative pressure adsorption; An adsorption plate, having a first positioning mechanism between the adsorption platform and the adsorption platform, wherein the top surface of the adsorption plate has a placement groove for accommodating and positioning the gas diffusion layer to be bonded, and the bottom surface of the placement groove has a plurality of second adsorption holes that cooperate with the first adsorption holes and are used for negative pressure adsorption; The proton exchange membrane clamp comprises an upper clamp and a lower clamp, the proton exchange membrane is clamped and fixed between the upper clamp and the lower clamp, the upper clamp and the lower clamp are provided with avoidance holes for avoiding the sprayed catalytic layer on both sides of the proton exchange membrane and the bonding area with the gas diffusion layer, and a second positioning mechanism is provided between the proton exchange membrane clamp and the adsorption platform and / or between the adsorption plates.

2. The device for bonding a fuel cell membrane electrode gas diffusion layer according to claim 1, characterized in that: The adsorption platform includes one or more adsorption modules. Correspondingly, the proton exchange membrane clamping plate is simultaneously clamped and fixed with the same number of proton exchange membranes as the adsorption modules. The adsorption plate includes the same number of placement slots as the adsorption modules. When the number of the placement slots is multiple, each placement slot is a separate adsorption plate or the placement slots are arranged on the same adsorption plate.

3. The device for bonding a fuel cell membrane electrode gas diffusion layer according to claim 1, characterized in that: The first positioning mechanism includes a first positioning column disposed on the top surface of the adsorption module and a first positioning hole disposed on the bottom surface of the adsorption plate and matched with the first positioning column.

4. The device for bonding a fuel cell membrane electrode gas diffusion layer according to claim 1, characterized in that: The second positioning mechanism is provided between the proton exchange membrane clamping plate and the adsorption platform.

5. The device for bonding a fuel cell membrane electrode gas diffusion layer according to claim 4, characterized in that: The second positioning mechanism includes a second positioning column arranged on the base and a second positioning hole arranged on the proton exchange membrane clamping plate and matched with the second positioning column.

6. The device for bonding a fuel cell membrane electrode gas diffusion layer according to claim 5, characterized in that: The second positioning hole is arranged on the lower clamping plate.

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