Membrane electrode assembling jig
By designing the membrane electrode assembly fixture, using structures such as positioning parts, vacuum holes and thermocouples, the misalignment, damage and fallout problems when the GDL and the five-layer membrane electrode are bonded, precise positioning and tight fit are achieved, and the bonding effect is improved.
Patent Information
- Application Number
- CN202421765651.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-25
AI Technical Summary
In hydrogen fuel cells, GDL and the five-layer film electrodes are easily misaligned when bonding, resulting in damage to the compressed fibers of GDL; uncured glue after bonding causes GDL to fall off; the five-layer film electrodes are easily wrinkled or wavy when bonding.
A membrane electrode assembly fixture is designed, including the first middle plate, the second bottom plate and the third top plate. Through structures such as positioning parts, vacuum holes and thermocouples, the precise positioning and close fit of the five-layer membrane electrodes and GDL is achieved to avoid damage to the GDL compressed fibers.
The precise positioning and close fit between the five-layer film electrode and GDL is achieved, avoiding the fiber damage and shedding of GDL and improving the fitting effect.
Smart Images
Figure CN222749515U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of production and assembly jigs, and more specifically relates to a membrane electrode assembly jig. Background Art
[0002] The gas diffusion layer, also known as GDL, is a key component in hydrogen fuel cells. It is mainly used to separate the hydrogen and oxygen sides and promote gas transport, moisture management and electron conduction.
[0003] At present, manual visual positioning is prone to misalignment when GDL and five-layer membrane electrode are bonded together, causing the compressed fibers of GDL to be easily damaged; after GDL and five-layer membrane electrode are bonded together, the glue is not heated and not cured, causing GDL to fall off easily; when bonding, the five-layer membrane electrode is wrinkled or wavy. Utility Model Content
[0004] The main purpose of the utility model is to provide a membrane electrode assembly jig with accurate positioning, no loss of GDL and good fitting effect.
[0005] According to the first aspect of the utility model, a membrane electrode assembly jig is provided, comprising a first middle plate for placing a five-layer membrane electrode, characterized in that one side of the first middle plate is connected to the second bottom plate, the other side of the first middle plate is clamped with the third top plate, a positioning portion is provided on the first middle plate for facilitating the positioning of the five-layer membrane electrode, a through hole is provided in the middle of the first middle plate, a boss for placing a gas diffusion layer is provided in the middle of the second bottom plate, a plurality of first vacuum holes are provided on the boss, the boss is inserted into the through hole, the middle of the third top plate is recessed inward to form a first groove, the first groove is used to place the gas diffusion layer, the first groove is matched with the boss, a plurality of second vacuum holes are provided on the first groove, and a thermocouple is provided in the third top plate.
[0006] In a specific embodiment of the present invention, one side of the first middle plate is connected to the second bottom plate via an elastic member.
[0007] In a specific embodiment of the present invention, a positioning hole matched with the positioning portion is provided on the third top plate.
[0008] In a specific embodiment of the present invention, a middle portion of one side of the first middle plate close to the third top plate is recessed inward to form a second groove, and the positioning portion is arranged in the second groove.
[0009] In a specific embodiment of the present invention, the second groove is matched with the third top plate, and the third top plate can be inserted into the second groove.
[0010] In a specific embodiment of the present invention, a plurality of the first vacuum holes are evenly distributed on the boss.
[0011] In a specific embodiment of the present invention, a plurality of the second vacuum holes are evenly distributed on the first groove.
[0012] In a specific embodiment of the utility model, a convex wall is provided at the edge of the boss, and the convex wall and the plane of the boss enclose to form a placement space.
[0013] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:
[0014] This membrane electrode assembly fixture places a gas diffusion layer on the boss of the second bottom plate, and adsorbs the gas diffusion layer placed on the boss through the first vacuum hole to prevent the gas diffusion layer from warping. A five-layer membrane electrode is placed on the first middle plate, and the five-layer membrane electrode is inserted into the positioning part of the first middle plate. The positioning part pulls the five-layer membrane electrode to make it unfold and flat on the first middle plate. A gas diffusion layer is placed on the third top plate, and adsorbs the gas diffusion layer placed on the third top plate through the second vacuum hole. The thermocouple is turned on, and then the third top plate is pressed downward. Under the action of hot pressing, the gas diffusion layer of the third top plate, the five-layer membrane electrode, and the gas diffusion layer of the second bottom plate are tightly fitted together. During the whole process, the gas diffusion layer is only compressed at the glue line position at the edge of the gas diffusion layer. The middle of the gas diffusion layer is not compressed, and the fibers of the gas diffusion layer will not be damaged. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;
[0016] Figure 1 It is a schematic diagram of the exploded structure of a membrane electrode assembly fixture in one embodiment of the utility model;
[0017] Figure 2 It is a schematic structural diagram of the third top plate in one embodiment of the utility model. DETAILED DESCRIPTION
[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0019] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0020] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more features.
[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.
[0023] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.
[0024] Reference Figure 1 to Figure 2 As shown, a membrane electrode assembly fixture is provided, including a first middle plate 1 for placing a five-layer membrane electrode, one side of the first middle plate 1 is connected to the second bottom plate 2, and the other side of the first middle plate 1 is clamped with the third top plate 3. The first middle plate 1 is provided with a positioning portion 11 for facilitating the positioning of the five-layer membrane electrode, a through hole 12 is opened in the middle of the first middle plate 1, a boss 21 for placing a gas diffusion layer is provided in the middle of the second bottom plate 2, a plurality of first vacuum holes 211 are provided on the boss 21, and the boss 21 is inserted into the through hole 12, the middle of the third top plate 3 is recessed inward to form a first groove 31, the first groove 31 is used to place the gas diffusion layer, the first groove 31 is adapted to the boss 21, a plurality of second vacuum holes 311 are provided on the first groove 31, and a thermocouple is provided in the third top plate 3.
[0025] In this embodiment, the lower layer of GDL is placed on the boss 21 of the second bottom plate 2, the vacuum is turned on, and the lower layer of GDL is adsorbed onto the boss through the first vacuum hole 211 to prevent the GDL from warping. The five-layer membrane electrode is prevented on the first middle plate 1, and the water vapor holes on the five-layer membrane electrode are just stuck on the positioning part 11 on the first middle plate 1. The positioning part 11 will pull the five-layer membrane electrode to make it unfold flat on the first middle plate 1. The upper layer of GDL is placed on the third top plate 3, the vacuum is turned on, and the upper layer of GDL is adsorbed onto the third top plate 3 through the second vacuum hole 311, and then the thermocouple heating is started to press the third top plate 3 downward. Under the action of hot pressing, the upper layer of GDL, the five-layer membrane electrode, and the lower layer of GDL are tightly attached together. During the whole process, the only part of the GDL that is pressed is the glue line position at the edge of the GDL. The middle of the GDL is not pressed, and the fibers of the GDL will not be damaged.
[0026] In one embodiment of the utility model, one side of the first middle plate 1 is connected to the second bottom plate 2 through an elastic member, and the five-layer membrane electrode can move up and down, which is conducive to the positioning of the five-layer membrane electrode and the GDL. In the natural state, the plane of the second groove 13 of the first middle plate 1 is higher than the plane of the boss 21 of the second bottom plate 2, and the bottom plane of the second groove 13 of the first middle plate 1 is lower than the plane of the boss 21 of the second bottom plate 2. When the first middle plate 1 is compressed by the elastic member, it will slide downward along the boss 21 of the second bottom plate 2, so that the lower layer GDL and the five-layer membrane electrode are attached. After the attachment, the first middle plate 1 is released and restored to the original state.
[0027] In one embodiment of the utility model, a positioning hole 32 adapted to the positioning portion 11 is provided on the third top plate 3, and the positioning portion 11 can be inserted into the positioning hole 32. When the third top plate 3 is pressed downward, the positioning portion 11 is inserted into the positioning hole 32, so that the third top plate 3 is better combined with the first middle plate 1, which facilitates better fitting and positioning of the five-layer membrane electrode and the GDL.
[0028] In one embodiment of the utility model, the middle part of one side of the first middle plate 1 close to the third top plate 3 is recessed inward to form a second groove 13, and the positioning portion 11 is arranged in the second groove 13. Further, the second groove 13 is adapted to the third top plate 3, and the third top plate 3 can be inserted into the second groove 13. The size of the second groove 13 is equal to the size of the third top plate 3. The third top plate 3 is pressed downward and is just inserted into the second groove 13. Then, the vacuum of the second bottom plate 2 is started to adsorb and fit the GDL of the third top plate 3 with the five-layer membrane electrode and the lower GDL to form a seven-layer membrane electrode. The size of the second groove 13 is the size of the outer contour of the five-layer membrane electrode. In the natural state, the bottom plane of the second groove 13 is higher than the plane of the boss 21.
[0029] In one embodiment of the utility model, a plurality of first vacuum holes 211 are evenly distributed on the boss 21, so that the lower layer GDL can be better adsorbed on the plane of the boss 21, and a plurality of second vacuum holes 311 are evenly distributed on the groove 31, so that the upper layer GDL can be better adsorbed on the first groove 31, thereby maintaining the flatness of the upper and lower layers of GDL and preventing them from deformation.
[0030] In one embodiment of the utility model, a convex wall 212 is provided at the edge of the boss 21, and the convex wall 212 and the plane of the boss 21 are enclosed to form a placement space 213, and the lower layer GDL is placed in the placement space 213. The size of the boss 21 is exactly the size of the lower layer GDL. The edge of the boss 21 has a circle of raised convex walls 212, and the width is exactly the width of the GDL glue line, which is convenient for fixing the lower layer GDL and better fitting with the five-layer membrane electrode.
[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A membrane electrode assembly jig, comprising a first middle plate (1) for placing five layers of membrane electrodes, characterized in that: One side of the first middle plate (1) is connected to the second bottom plate (2), and the other side of the first middle plate (1) is snap-fitted to the third top plate (3). The first middle plate (1) is provided with a positioning portion (11) for facilitating the positioning of the five-layer membrane electrode. A through hole (12) is provided in the middle of the first middle plate (1). A boss (21) for placing a gas diffusion layer is provided in the middle of the second bottom plate (2). The boss (21) is provided with a plurality of first vacuum holes (211). The boss (21) is inserted into the through hole (12). The middle of the third top plate (3) is recessed inward to form a first groove (31). The first groove (31) is used to place the gas diffusion layer. The first groove (31) is matched with the boss (21). The first groove (31) is provided with a plurality of second vacuum holes (311). A thermocouple is provided in the third top plate (3).
2. The membrane electrode assembly jig according to claim 1, characterized in that: One side of the first middle plate (1) is connected to the second bottom plate (2) via an elastic member.
3. The membrane electrode assembly jig according to claim 1, characterized in that: The third top plate (3) is provided with a positioning hole (32) adapted to the positioning portion (11).
4. The membrane electrode assembly jig according to claim 1, characterized in that: The middle part of one side of the first middle plate (1) close to the third top plate (3) is recessed inwards to form a second groove (13), and the positioning portion (11) is arranged in the second groove (13).
5. The membrane electrode assembly jig according to claim 4, characterized in that: The second groove (13) is matched with the third top plate (3), and the third top plate (3) can be inserted into the second groove (13).
6. The membrane electrode assembly jig according to claim 1, characterized in that: A plurality of the first vacuum holes (211) are evenly distributed on the boss (21).
7. The membrane electrode assembly jig according to claim 1, characterized in that: A plurality of the second vacuum holes (311) are evenly distributed on the first groove (31).
8. The membrane electrode assembly jig according to claim 1, characterized in that: A convex wall (212) is provided at the edge of the boss (21), and the convex wall (212) and the plane of the boss (21) enclose a placement space (213).