A hydrogen fuel cell stack dedicated jig

Abstract

The utility model discloses a kind of special fixture of hydrogen fuel cell stack, comprising: bottom plate and at least two positioning frames being set on bottom plate, the positioning frame includes: fixed in the driving element of bottom plate;Base is set in the power output end of driving element;Multiple vertical positioning rods are set on base;Wherein, the base is configured as L shape, and with the lower end plate of hydrogen fuel cell stack diagonal adaptation;The positioning rod protrudes inside base setting, and positioning rod inside is adapted with the lower end plate limit slot.The utility model provides a kind of special fixture of hydrogen fuel cell stack, by setting driving element moving base, the position of positioning rod can be moved according to circumstances, when being stacked, it is moved to limit place, guarantee limit accurate, while when stacking is completed, the limit of hydrogen fuel cell stack can be removed by moving base, avoid positioning frame to shield, so as to be fixed, detected and moved to the stack completed electric pile, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology. More specifically, this utility model relates to a special clamp for hydrogen fuel cell stacks. Background Technology

[0002] A hydrogen fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy, featuring zero emissions and high efficiency. Its core components include a membrane electrode assembly (MEA) and a bipolar plate (BPP). The MEA consists of a proton exchange membrane, a catalyst layer, and a gas diffusion layer, and is the site of electrochemical reactions. The bipolar plate is responsible for guiding gas flow, collecting current, and providing mechanical support for the MEA.

[0003] Cell stacking is the process of assembling multiple single cells in series into a high-power cell stack. Specifically, it involves alternately stacking membrane electrode assemblies (MEAs) and bipolar plates (BPPs), along with sealing gaskets, insulating plates, and other components, and securing them using an upper plate, pull rods, or straps. During stacking, the lower plate, current collector, and insulating plate must first be placed in predetermined positions. Then, the MEAs and BPPs are sequentially stacked in a cyclic manner with precise alignment aided by a fixture. However, existing fixtures, with their four-directional limiting capabilities, are inconvenient for installing pull rods or straps for securing and moving the stacked cell stack.

[0004] For example, the invention patent with announcement number CN113752184 B discloses a hydrogen fuel cell stacking fixture and its usage method and application, including a base plate and a positioning component detachably fixed to the surface of the base plate. The slidable and adjustable bipolar plate positioning component is suitable for the entire process positioning of battery stack end plates and bipolar plates of different specifications and sizes. However, in order to ensure accurate positioning, the positioning component of this device limits and blocks in multiple horizontal directions. After stacking, the positioning component is not moved, which is not convenient for subsequent fixing and moving of the stacked fuel cell stack. Summary of the Invention

[0005] One object of this invention is to solve the above-mentioned problems and / or defects, and to provide the advantages that will be described later.

[0006] To achieve these objectives and other advantages of this utility model, a special clamping fixture for hydrogen fuel cell stacks is provided, comprising: a base plate and at least two positioning frames disposed on the base plate, wherein the positioning frames include: Drive components fixed to the base plate; A base installed at the power output end of the drive component; Multiple positioning rods are vertically mounted on the base; The base is configured in an L-shape and is diagonally adapted to the lower end plate of the hydrogen fuel cell stack. The positioning rod protrudes from the inner side of the base, and the inner side of the positioning rod is adapted to the limiting groove of the lower end plate.

[0007] Preferably, it also includes: a slide rail fixed to the base plate; The base is slidably connected to the slide rail.

[0008] Preferably, the slide rail is provided with a limiting platform at the end near the hydrogen fuel cell stack to limit the movement distance of the base.

[0009] Preferably, the drive element is configured as a cylinder; The cylinder piston rod is fixedly connected to the base.

[0010] Preferably, it also includes: a guide fixed to the base plate to limit the maximum distance of the piston rod extension; The piston rod is provided with a boss that is adapted to the guide to limit the movement distance of the piston rod.

[0011] Preferably, the piston rod cross-section is configured as rectangular, and the guide has a rectangular hole through which the piston rod passes.

[0012] Preferably, the positioning rod is provided with a reinforcing rib on the side away from the hydrogen fuel cell stack.

[0013] This utility model has at least the following beneficial effects: by setting a moving base for the driving component, the position of the positioning rod can be moved as needed. When stacking, it can be moved to the limit position to ensure accurate positioning. At the same time, when the stacking is completed, the limiting position of the hydrogen fuel cell stack can be released by moving the base to avoid the positioning frame from blocking it, so as to facilitate the fixing, inspection and movement of the stacked stack, and improve work efficiency.

[0014] Other advantages, objectives and features of this invention will be apparent in part from the description which follows, and in part from the understanding of those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a special clamp for a hydrogen fuel cell stack in one embodiment of the present invention; Figure 2 This is a top view of a special clamp for a hydrogen fuel cell stack in one embodiment of the present invention; Figure 3 This is a cross-sectional view of the piston rod of a special clamp for hydrogen fuel cell stacks in one embodiment of the present invention.

[0016] The markings in the diagram are: 1. Base plate, 2. Positioning frame, 21. Drive component, 211. Piston rod, 212. Boss, 22. Base, 23. Positioning rod, 24. Reinforcing rib, 3. Slide rail, 31. Limiting platform, 4. Guide component. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not list the presence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Example 1 A special clamp for hydrogen fuel cell stacks, the structure of which is as follows: Figure 1-2 As shown, it includes: a base plate 1 and at least two positioning frames 2 disposed on the base plate 1, wherein the positioning frame 2 includes: Drive component 21 fixed to base plate 1; The base 22 is installed at the power output end of the drive component 21; Multiple positioning rods 23 are vertically mounted on the base 22; The base 22 is configured to be diagonally adapted to the lower end plate of the hydrogen fuel cell stack in an L-shape.

[0023] The base 22 is configured in an L-shape and is diagonally adapted to the lower end plate of the hydrogen fuel cell stack. The positioning rod 23 protrudes from the inner side of the base 22, and the inner side of the positioning rod 23 is adapted to the limiting groove of the lower end plate.

[0024] In practical applications, the lower end plate edge is provided with a limiting groove whose depth is adapted to the width of the side of the membrane electrode, bipolar plate, etc. The positioning frame 2 is configured as two, respectively set at the diagonal position of the lower end plate of the hydrogen fuel cell stack, to ensure that the hydrogen fuel cell stack is limited in all directions in the horizontal direction.

[0025] Working principle: When stacking hydrogen fuel cell stacks, the lower end plate, current collector, and insulating plate are first placed on the base plate 1. The base 22 is driven by the drive component 21 to the diagonal of the lower end plate for positioning. Then, the membrane electrode assembly (MEA) and bipolar plates (BPP) are stacked sequentially with precise edge alignment within the limiting range of the positioning rod 23. After reaching the required quantity, the upper end plate, current collector, etc. are stacked on the top layer. Then, the stacking layers are pressed and fixed. After pressing, the base 22 is moved by the drive component 21 to move the positioning rod 23 away from the hydrogen fuel cell stack, which facilitates the installation of tie rods, etc., to ensure that the stack is pressed and permanently shaped. Finally, the stack is removed from the stacking station for subsequent related tests.

[0026] By setting the driving component 21 to move the base 22, the position of the positioning rod 23 can be moved as needed. When stacking, it can be moved to the limit position to ensure accurate positioning. At the same time, when the stacking is completed, the limit on the hydrogen fuel cell stack can be released by moving the base 22 to avoid the positioning frame 2 from blocking it. This makes it easier to fix, inspect and move the stacked stack, thus improving work efficiency.

[0027] Example 2 This second embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-3 As shown, based on embodiment 1, it discloses the following improvement: it also includes a slide rail 3 fixed to the base plate 1; The base 22 is slidably connected to the slide rail 3.

[0028] The slide rail 3 is provided with a limiting platform 31 at the end near the hydrogen fuel cell stack to limit the movement distance of the base 22.

[0029] In practical applications, the slide rail 3 and the base plate 1 are fixedly connected by bolts; the slide rail 3 and the base 22 are provided with mutually compatible T-slots and T-shaped platforms so that the base 22 can move along the extension direction of the slide rail 3.

[0030] Working principle: By setting the slide rail 3, the movement path of the base 22 can be prevented from deviating, thus improving the positioning accuracy of the device; the limiting platform 31 limits the movement distance of the base 22, preventing the base 22 from moving beyond the range, interfering with the position of the lower end plate, or causing the stacking position of the hydrogen fuel cell stack to deviate, thus affecting the subsequent stacking work.

[0031] Example 3 This third embodiment is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1-3 As shown, based on embodiment 1, the following improvement is disclosed: the drive element 21 is configured as a cylinder; The cylinder piston rod 211 is fixedly connected to the base 22.

[0032] It also includes: a guide 4 fixed to the base plate 1 to limit the farthest distance of the piston rod 211 extending; The piston rod 211 is provided with a boss 212 that is adapted to the guide 4 to limit the movement distance of the piston rod 211.

[0033] The piston rod 211 has a rectangular cross-section, and the guide 4 has a rectangular hole through which the piston rod 211 passes.

[0034] In practical applications, the drive component 21, the guide component 4, and the base plate 1 are fixedly connected by bolts; Working principle: The guide 4 and rectangular piston rod 211 ensure that the piston rod 211 does not flip during movement, avoids the position displacement of the positioning rod 23, and ensures its accurate positioning. The boss 212 limits the extension length of the piston rod 211, preventing the base 22 from moving beyond its range, interfering with the position of the lower end plate, or causing the stacking position of the hydrogen fuel cell stack to shift, affecting subsequent stacking work.

[0035] Example 4 This embodiment 4 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1 As shown, based on embodiment 1, the following improvement is disclosed: the positioning rod 23 is provided with a reinforcing rib 24 on the side away from the hydrogen fuel cell stack.

[0036] In practical applications, the reinforcing rib 24 is configured as a triangle, with its lower end fixed to the base 22 and its vertical side fixed to the positioning rod 23.

[0037] Working principle: The reinforcing rib 24 can further improve the stability of the positioning rod 23 without interfering with the stacking operation, ensuring that the positioning rod 23 remains vertical and preventing it from tilting under force, which would cause the stacked layers to shift or tilt.

[0038] The above solutions are merely illustrative examples of preferred embodiments, but are not limited thereto. When implementing this invention, appropriate substitutions and / or modifications can be made according to the user's needs.

[0039] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0040] Although embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for this utility model. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A special clamp for hydrogen fuel cell stacks, comprising: A base plate and at least two positioning frames disposed on the base plate, characterized in that the positioning frames include: Drive components fixed to the base plate; A base installed at the power output end of the drive component; Multiple positioning rods are vertically mounted on the base; The base is configured in an L-shape and is diagonally adapted to the lower end plate of the hydrogen fuel cell stack. The positioning rod protrudes from the inner side of the base, and the inner side of the positioning rod is adapted to the limiting groove of the lower end plate.

2. The hydrogen fuel cell stack-specific clamp as described in claim 1, characterized in that, Also includes: Slide rails fixed to the base plate; The base is slidably connected to the slide rail.

3. The hydrogen fuel cell stack-specific clamp as described in claim 2, characterized in that, The slide rail is equipped with a limiting platform at the end near the hydrogen fuel cell stack to restrict the movement distance of the base.

4. The hydrogen fuel cell stack special clamp as described in claim 1, characterized in that, The drive component is configured as a cylinder; The piston rod of the cylinder is fixedly connected to the base.

5. The hydrogen fuel cell stack-specific clamp as described in claim 4, characterized in that, Also includes: A guide fixed to the base plate to limit the maximum distance the piston rod extends; The piston rod is provided with a boss that is adapted to the guide to limit the movement distance of the piston rod.

6. The hydrogen fuel cell stack-specific clamp as described in claim 5, characterized in that, The piston rod has a rectangular cross-section, and the guide has a rectangular hole through which the piston rod passes.

7. The hydrogen fuel cell stack clamp as described in claim 1, characterized in that, The positioning rod is reinforced on the side away from the hydrogen fuel cell stack.

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