CN222261135U

CN222261135U - A membrane electrode assembly device

Info

Publication number: CN222261135U
Application number: CN202420387972.XU
Authority: CN
Inventors: 郑虓; 李延凤; 万仁杰; 贾岳; 尚春祥; 王世华; 张晶
Original assignee: Beijing Qingchi Technology Co ltd
Current assignee: Beijing Qingchi Technology Co ltd
Priority date: 2024-02-29
Filing date: 2024-02-29
Publication date: 2024-12-27
Anticipated expiration: 2034-02-28

Abstract

A membrane electrode assembly device includes a lower base, an adsorption end plate and an upper base arranged in sequence from bottom to top, wherein the adsorption end plate provides a fixed position for a CCM fixed on a frame, and the CCM is suspended on the adsorption end plate. The inner top of the upper base is used to detachably connect an upper GDL and place the upper GDL above the CCM, and the lower base is used to detachably connect a lower GDL and place the lower GDL below the CCM. The utility model can avoid wrinkles, uneven adsorption, uneven force, etc. on the CCM, and effectively improve the yield rate.

Description

Membrane electrode assembly's assembly quality

Technical Field

The utility model belongs to the field of membrane electrode preparation, and particularly relates to an assembly device of a membrane electrode assembly.

Background

The membrane electrode assembly is a core component of the proton exchange membrane fuel cell and is an important place for electrochemical reaction. The structure of the membrane electrode comprises a proton exchange membrane in the middle, and a cathode catalytic layer and an anode catalytic layer distributed on two sides of the proton exchange membrane, wherein the cathode catalytic layer and the anode catalytic layer are formed by coating corresponding catalyst slurry, the three-layer structure is commonly called CCM (Catalyst Coated Membrane, catalyst coating film), the two sides of the CCM are stuck with frames to fix the formed frame/CCM/frame structure, and the gas diffusion layers (GDL, gas Diffusion Layer) are mutually stuck layer by layer, so that a complete membrane electrode group is formed.

The manual assembly jig of the membrane electrode assembly is mainly used for the conditions of small sample requirement quantity, daily required membrane electrode sample manufacture in a laboratory and the like, a gas diffusion layer, a frame and CCM are required to be placed on the jig with corresponding dimensions during preparation, and then the jig is sequentially attached, the conditions of wrinkling, uneven adsorption, uneven stress and the like of the CCM are avoided during the process, and if the conditions exist, the durability of the membrane electrode is possibly reduced during long-term operation.

In the current practical application, the gas diffusion layers with different thicknesses are usually used in the assembly process of the membrane electrode assembly, or different types of glue are selected to bond the gas diffusion layers, but the current jig can only be compatible with the gas diffusion layers with fixed thickness or the gas diffusion layers only use hot melt adhesive or pressure sensitive adhesive, and cannot be compatible with various conditions.

Therefore, the jig can ensure the alignment precision, meanwhile, the compatibility of the assembly process of the membrane electrode assembly is better, and the jig can be applicable to various use conditions and materials, so that the cost can be saved, the working efficiency can be improved, and the quality of products can be ensured.

Disclosure of utility model

In order to overcome the defects of the prior art, the utility model provides an assembly device of a membrane electrode assembly, which can solve at least one of the following problems that CCM is prevented from being damaged, the assembly of membrane electrodes is compatible with gas diffusion layers with different thicknesses, and the lamination of GDL with different types of glue and CCM is compatible.

The utility model provides an assembly device of membrane electrode group, includes the lower base, adsorb end plate and the last base that set gradually from bottom to top, adsorb the end plate and be used for placing the CCM of fixing on the frame, the CCM is unsettled to be placed on adsorbing the end plate, the interior top of going up the base is used for adsorbing GDL, the top of lower base is used for placing down GDL.

Advantageous effects

1. The assembly device of the membrane electrode assembly comprises a lower base, an adsorption end plate and an upper base, wherein the adsorption end plate provides fixed sites for CCMs fixed on a frame, the CCMs are suspended on the adsorption end plate, the inner top of the upper base is used for detachably connecting an upper GDL and placing the upper GDL above the CCMs, the lower base is used for detachably connecting a lower GDL and placing the lower GDL below the CCMs, when the assembly device is used, the CCMs fixed on the frame can be fixed on the adsorption end plate, and the CCMs are suspended, so that the conditions of wrinkling, uneven adsorption, uneven stress and the like of the CCMs can be avoided, and the yield is effectively improved.

2. In the assembly device of the membrane electrode assembly, the upper gasket capable of adjusting the compressibility degree of the upper GDL is arranged at the lower part of the upper base, and the lower gasket used for adjusting the compressibility degree of the lower GDL is arranged at the top of the lower base. When the membrane electrode assembly is used, the GDL is firstly placed on the lower base, the height of the GDL is adjusted through the lower gasket, the GDL is in contact with or not in contact with the bottom of the adsorption end plate, then CCM fixed on the frame is adsorbed on the adsorption end plate, finally the upper GDL is adsorbed on the upper base, the upper base is covered on the adsorption end plate, and the membrane electrode assembly can be assembled by pressing. The utility model can adjust the height of the corresponding GDL through the upper gasket and the lower gasket, so that the GDL with different thickness can be compatible for lamination, the GDL can be ensured to be laminated in a compressible range, the GDL is prevented from being excessively compressed, CCM in the membrane electrode with five-layer structure is positioned in the hollow accommodating cavity of the adsorption end plate and is not contacted with the adsorption hole, and the phenomenon that the durability of the membrane electrode is influenced by the occurrence of folds or uneven adsorption of the CCM can be avoided.

3. Heating structures are arranged in the upper base and the lower base, so that the bonding of the GDL with pressure-sensitive adhesive or hot melt adhesive can be compatible.

Drawings

FIG. 1 is a schematic structural view of an assembly device of a membrane electrode assembly;

FIG. 2 is an assembly view of embodiment 2;

fig. 3 is an assembly view of embodiment 3.

The device comprises a frame, a 1-upper base, a 2-adsorption end plate, a 3-lower base, a 4-CCM fixed on the frame, a 5-opening, a 6-second positioning hole, a 7-positioning column, an 8-upper gasket, a 9-lower gasket, a 10-bulge, an 11-upper GDL and a 12-lower GDL.

[ Assembling device of Membrane electrode Assembly ]

As described above, the present utility model provides an assembly device for a membrane electrode assembly, comprising a lower base, an adsorption end plate and an upper base, which are sequentially arranged from bottom to top, wherein the adsorption end plate provides a fixed site for a CCM fixed on a frame, the CCM is suspended on the adsorption end plate, the inner top of the upper base is used for detachably connecting an upper GDL and placing the upper GDL above the CCM, and the lower base is used for detachably connecting a lower GDL and placing the lower GDL below the CCM.

According to the embodiment of the utility model, the adsorption end plate comprises a supporting frame and a hollow accommodating cavity formed by wrapping the supporting frame, wherein the supporting frame is used for supporting a frame at the periphery of the CCM, the CCM is positioned on the accommodating cavity and is not in contact with the supporting frame, and preferably the area of the accommodating cavity is larger than or equal to that of the CCM.

According to the embodiment of the utility model, the outer frame is provided with a plurality of first positioning holes, a plurality of openings are formed in the position, corresponding to the first positioning holes, of the supporting frame, a second positioning hole is formed in the position, corresponding to the openings of the adsorption end plate, of the upper base, and a detachable positioning column is arranged in the second positioning hole.

According to an embodiment of the utility model, the positioning column has a cross-sectional dimension identical to the dimension of the opening of the adsorption end plate.

As another example, the connecting frame is provided with a plurality of vacuum adsorption holes for adsorbing the frame, preferably the vacuum adsorption holes are arranged on the upper surface of the supporting frame, and preferably a plurality of air holes are arranged on the upper surface of the supporting frame.

According to the embodiment of the utility model, the upper base can be covered on the adsorption end plate, the lower part of the upper base is provided with an upper gasket for adjusting the compressibility of the upper GDL, the top of the lower base is provided with a lower gasket for adjusting the compressibility of the lower GDL, and the number of the upper gasket and the lower gasket is set according to the actual thickness requirement.

According to the embodiment of the utility model, two upper gaskets are arranged in the upper base, the two upper gaskets are distributed on two opposite sides in the upper base, the area between the two upper gaskets is used for accommodating the upper GDL, and a plurality of vacuum adsorption holes are formed in the inner wall of the upper base and used for adsorbing the upper gaskets and the upper GDL.

According to an embodiment of the present utility model, the inner top of the upper base is provided with an upper GDL housing mark, preferably the upper GDL housing area mark is drawn or etched.

According to an embodiment of the utility model, the thickness of both upper gaskets is the same or different, preferably the same, and the upper gasket thickness is selected within the range of compression ratios that the upper GDL can withstand.

According to an embodiment of the present utility model, lower gaskets are distributed on both sides of the lower base, and a region between the lower gaskets is used for accommodating the lower GDL.

According to the embodiment of the utility model, the middle of the top of the lower base is provided with the bulge, the position of the bulge corresponds to the accommodating cavity of the adsorption end plate, the bulge can penetrate through the accommodating cavity, the heating mechanism is arranged at the bottom of the bulge, and the lower gaskets are distributed on two sides of the bulge.

According to an embodiment of the present utility model, the thickness of the lower spacer is selected to be within the range of compression ratios that the lower GDL can withstand.

According to the embodiment of the utility model, the inner top of the upper base is provided with an air hole, the air hole is connected with an external vacuum pump, and the air hole is communicated with the vacuum adsorption hole and is used for providing vacuum adsorption force for the vacuum adsorption hole.

According to the embodiment of the utility model, the upper surface of the supporting frame of the adsorption end plate is provided with a plurality of air holes, the air holes are connected with an external vacuum pump, and the air holes are communicated with the vacuum adsorption holes and are used for providing vacuum adsorption force for the vacuum adsorption holes.

According to the embodiment of the utility model, the heating mechanism is arranged inside the lower base, and the heating mechanism is arranged inside the upper base.

According to an embodiment of the utility model, the heating mechanism is connected with a power supply through a controller, and the controller is used for controlling the opening and closing of the heater and the temperature.

Detailed Description

The structure of the present utility model will be described in further detail with reference to specific examples. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the utility model. All techniques implemented based on the above description of the utility model are intended to be included within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, GDL means a gas diffusion layer.

Example 1

Referring to fig. 1, an assembly device of a membrane electrode assembly comprises an upper base 1, an adsorption end plate 2 and a lower base 3 which are sequentially arranged from top to bottom, wherein a heating mechanism is arranged inside the lower base 3, the heating mechanism is arranged inside the upper base 1 and connected with a power supply through a controller, the controller is used for controlling the opening and closing and the temperature of the heater, a vacuum adsorption hole is formed in the lower surface of the upper base 1 and used for adsorbing an upper gasket 8 and an upper GDL11, and meanwhile, an upper GDL11 accommodating mark line is arranged and can be obtained through drawing or etching and mainly used for ensuring the accurate alignment of the upper GDL 11.

Wherein, adsorb end plate 2 and be used for placing the CCM4 of fixing on the frame, the CCM is unsettled to be placed on adsorbing the end plate, wherein, adsorb end plate 2 and hold the chamber including the braced frame with the cavity that is formed by the braced frame is wrapped, the braced frame is used for supporting the frame, the CCM is located to hold the intracavity and not with connect the frame contact, hold the area in chamber more than or equal to the area of CCM.

In this embodiment, the top surface of adsorption end plate 2 is provided with a plurality of vacuum adsorption holes for adsorb the CCM4 of fixing on the frame, be provided with a plurality of gas pockets on the adsorption end plate 2, the gas pocket is connected with outside vacuum pump, and the gas pocket is linked together with the vacuum adsorption hole, is used for providing vacuum adsorption power for the vacuum adsorption hole.

The outer frame of the CCM4 fixed on the frame is provided with a plurality of first positioning holes, a plurality of openings 5 are formed in the position, corresponding to the first positioning holes, of the supporting frame, a second positioning hole 6 is formed in the position, corresponding to the openings 5, of the adsorption end plate, of the upper base, a detachable positioning column 7 is arranged in the second positioning hole 6, the cross section size of the positioning column 7 is the same as that of the openings 5 in the adsorption end plate 2, two upper gaskets 8 are arranged in the upper base 1, the two upper gaskets 8 are distributed on two opposite sides in the upper base 1, the area between the two upper gaskets 8 is used for accommodating an upper GDL11, a plurality of vacuum adsorption holes are formed in the inner wall of the upper base 1 and are used for adsorbing the upper GDL11, the thickness selection range of the upper gaskets 8 is within the range of the compression ratio bearable by the upper GDL11, the inner wall of the upper base 1 is of a hollow structure, air holes are formed in the outer side of the inner wall and are connected with an external vacuum pump, and the air holes are communicated with the vacuum adsorption holes and are used for providing vacuum adsorption force for the vacuum adsorption holes.

The upper surface of lower base 3 distributes and has two lower gaskets 9, and the region between two lower gaskets 9 is used for holding down GDL12, be provided with protruding 10 in the middle of the top of lower base 3, protruding 10's position corresponds with the holding chamber of adsorption end plate 2, just protruding 10 can pass holding chamber, heating mechanism sets up in the bottom of protruding 10, protruding 10 adopts the heat conduction material to make, and lower gasket 9 distributes in the both sides of protruding 10, and the thickness selection scope of lower gasket 9 should be in the scope of the compression ratio that lower GDL12 can bear.

The thickness of the upper and lower gaskets 8, 9 is selected in relation to the pressure required for assembly and the compressibility of the GDL (upper GDL11 or lower GDL 12), and is generally selected in the range of the compressibility that the GDL can withstand, and the upper and lower gaskets 8, 9 can be adjusted to use different thicknesses for different types of GDLs.

Example 2

When the size of the GDL is slightly larger than the size of the inner frame of the frame in the MEA design, the surface of the GDL is coated with hot-melt glue, the hot-melt glue has no viscosity at normal temperature, and the hot-melt glue has viscosity after being heated and can be bonded with CCM4 fixed on the frame.

Referring to fig. 2, the lower base 3 is placed on a platform (any table top placed in parallel), the thickness of the lower gasket 9 is required to be placed according to the compression condition of the lower GDL12 required for assembling the membrane electrode, the lower GDL12 is prevented from being excessively compressed, the adsorption end plate 2 is placed on the lower base, the lower GDL12 passes through the accommodating cavity of the adsorption end plate 2 (the CCM area of the lower GDL12 with glue faces the adsorption end plate 2) and is placed on the protrusion 10 of the lower base 3, the CCM4 fixed on the frame is fixed on the adsorption end plate 2, the vacuum pump is opened after the placement is flat, the CCM4 fixed on the frame is flatly adsorbed in the adsorption end plate 2, the CCM4 fixed on the frame is positioned on the top of the lower GDL12, the vacuum adsorption hole is arranged on the supporting frame of the adsorption end plate 2, the CCM4 fixed on the frame is not provided with a corresponding vacuum adsorption hole, the surface mark and the adsorption uneven condition can be avoided from being caused by adsorption, the upper GDL is positioned on the upper base 1, the upper end plate 11 is prevented from being pressed against the upper base 11, the temperature is required to be increased, the membrane electrode is required to be positioned on the upper base 11, and the upper base is required to be pressed on the upper base 11, and the upper end plate is required to be compressed, the upper end plate is positioned on the upper base 11 is required to be pressed, and the upper end plate is positioned on the upper end plate 2 is required to be pressed.

Example 3

When the size of the GDL is slightly larger than the size of the inner frame of the frame in the MEA design, the GDL is coated with pressure-sensitive glue, and the glue has viscosity at normal temperature and can be bonded with five layers of membrane electrodes.

As shown in fig. 3, two lower gaskets 9 are respectively placed on two sides of the protrusion 10 of the lower base 3, the thickness of the lower gasket 9 is selected in relation to the pressure required for assembly and the compressibility of the lower GDL12, the thickness of the single sheet is generally selected in the range of the compressibility that the lower GDL12 can bear, and at the same time, the two gaskets are ensured to be overlapped to make the lower GDL12 slightly lower than the bottom of the adsorption end plate 2, so that when the CCM4 fixed on the frame is placed, the CCM4 fixed on the frame cannot be accurately positioned due to the viscosity of glue on the lower GDL12 and the initial contact of the lower GDL12 on the lower base 3. The thickness of the lower gasket 9 is adjusted according to the thickness of different lower GDL12, the lower base 3 is placed on the platform, the adsorption end plate 2 is placed on the lower base 1, the lower GDL12 is placed on the bulge 10 of the lower base 3 (the lower GDL12 is provided with glue facing the adsorption end plate 2), the CCM4 fixed on the frame is placed on the upper surface of the adsorption end plate 2, the frame of the CCM4 fixed on the frame is flatly adsorbed on the surface of the adsorption end plate 2 by opening a vacuum pump after being flatly placed, at this time, the CCM area of the CCM4 fixed on the frame is positioned on the top of the lower GDL12 on the bulge 10, because the lower GDL12 is provided with pressure-sensitive glue, a heating power supply is not required to be turned on, the upper GDL11 is placed at the positioning mark of the upper base 1, vacuum adsorption is started, the upper GDL11 is adsorbed on the inner top of the upper base 1, meanwhile, the thickness of the upper GDL11 is required to be placed according to the compression condition of the upper GDL11, the upper GDL11 is prevented from being excessively compressed, the upper base 1 is covered on the adsorption end plate 2, the left and the lower MEA 9 is removed, and then the upper base 1 is assembled manually.

Example 4

When the GDL is designed to have the same dimensions as the inner frame of the frame, the step of assembling the MEA is the same as that of embodiment 1 or embodiment 2, regardless of whether the GDL is coated with pressure sensitive glue or hot melt glue, except that the thickness of the gasket is selected while the MEA is assembled, taking into account the thickness of the frame, i.e., the thickness of the gasket = the thickness of the frame + the thickness of the GDL in the desired compressible range.

Example 5

In this embodiment, a plurality of fixing holes are formed in the frame, a groove is formed in a position, corresponding to the frame, of the supporting frame, a fixing piece is arranged in the groove, when the fixing piece is inserted into the groove of the fixing hole box, the mode that the frame is fixed on the supporting frame connects the adsorption end plate 2 with the CCM4 fixed on the frame, and other modes are the same as those of embodiment 1.

The foregoing description of the specific embodiments of the present utility model has been presented by way of example. The scope of protection of the present utility model is not limited to the exemplary embodiments described above. Any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present utility model should be included in the scope of protection of the claims of the present utility model.

Claims

1. The utility model provides an assembly device of membrane electrode group, its characterized in that, includes lower base, absorption end plate and the last base that sets gradually from bottom to top, absorption end plate provides fixed site for the CCM of fixing on the frame, and the CCM is unsettled to be placed on absorption end plate, the interior top of going up the base is used for dismantling and connects GDL and place last GDL in the CCM top, lower base is used for dismantling and connects down GDL and places down GDL in the CCM below.

2. The mea assembling device according to claim 1, wherein the adsorption end plate comprises a support frame and a hollow accommodating chamber surrounded by the support frame, the support frame is used for supporting a frame of the periphery of the CCM, and the CCM is located on the accommodating chamber and is not in contact with the support frame.

3. The device for assembling a membrane electrode assembly according to claim 2, wherein a plurality of first positioning holes are formed in an outer frame of the CCM fixed to the frame, a plurality of openings are formed in positions, corresponding to the first positioning holes, of the support frame, a second positioning hole is formed in positions, corresponding to the openings of the adsorption end plate, of the upper base, and a detachable positioning column is arranged in the second positioning hole.

4. A device for assembling a membrane electrode assembly according to any one of claims 1 to 3, wherein the upper base can be covered on the adsorption end plate, an upper gasket for adjusting the compressibility of the upper GDL is provided at the lower part of the upper base, and a lower gasket for adjusting the compressibility of the lower GDL is provided at the top of the lower base.

5. The membrane electrode assembly device according to claim 4, wherein two upper gaskets are disposed inside the upper base, the two upper gaskets being disposed on opposite sides of the upper base, and a region between the two upper gaskets is for accommodating the upper GDL.

6. The membrane electrode assembly assembling apparatus according to claim 5, wherein the inner wall of the upper base is provided with a plurality of vacuum adsorption holes for adsorbing the upper gasket and the upper GDL.

7. A device for assembling a membrane electrode assembly according to any one of claims 1 to 3, wherein the inner roof of the upper base is provided with an upper GDL receiving sign.

8. The membrane electrode assembly device according to claim 4, wherein lower gaskets are disposed on both sides of the lower base, and a region between the two lower gaskets is used for accommodating a lower GDL.

9. The membrane electrode assembly assembling device according to claim 4, wherein a protrusion is provided in the middle of the top of the lower base, the protrusion is located corresponding to the accommodating cavity of the adsorption end plate, the protrusion can pass through the accommodating cavity, the heating mechanism is disposed at the bottom of the protrusion, and the lower gaskets are distributed on two sides of the protrusion.

10. A device for assembling a membrane electrode assembly according to any one of claims 1 to 3, wherein the upper base has an air hole provided at an inner top thereof, the air hole being connected to an external vacuum pump, the air hole being in communication with the vacuum adsorption hole for providing a vacuum adsorption force to the vacuum adsorption hole.

11. A device for assembling a membrane electrode assembly according to any one of claims 1 to 3, wherein a plurality of air holes are formed in the upper surface of the support frame of the adsorption terminal plate, the air holes are connected to an external vacuum pump, and the air holes are communicated with the vacuum adsorption holes for providing vacuum adsorption force to the vacuum adsorption holes.

12. A device for assembling a membrane electrode assembly according to any one of claims 1 to 3, wherein a heating mechanism is provided inside the lower base, and a heating mechanism is provided inside the upper base.

13. The apparatus according to claim 12, wherein the heating mechanism is connected to a power source via a controller for controlling the opening and closing of the heater and the temperature.