Quick adhesive line pasting and positioning tool for bipolar plate of fuel cell

Abstract

The utility model relates to a fuel cell bipolar plate glue line rapid pasting positioning tool which comprises a tool base and a cover plate covering the positioning base, and the upper surface of the tool base is sunken downwards to form a glue line positioning groove used for containing a sealing glue line. The depth of the rubber line positioning groove is smaller than the thickness of the portion, protruding out of the surface of the bipolar plate, of the sealing rubber line after the sealing rubber line is bonded to the bipolar plate, and positioning structures are formed between the tool base and the bipolar plate and between the tool base and the cover plate respectively. And the positioning structure is configured to enable the sealing glue line to be bonded in the glue line bonding groove of the bipolar plate when the cover plate covers and presses the bipolar plate. The tool base is provided with the glue line positioning groove for accommodating and fixing the sealing glue line so as to facilitate dispensing on the upper surface of the sealing glue line, and the bipolar plate is pressed and covered on the tool base through the cover plate, so that bonding of the sealing glue line and the bipolar plate is realized, the bonding difficulty of the sealing glue line and the bipolar plate is simplified, and the bonding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a quick-attachment and positioning fixture for bipolar plate adhesive wires in fuel cells, belonging to the field of hydrogen production technology using electrolyzers. Background Technology

[0002] Fuel cells represent a crucial direction for the development of hydrogen energy. Fuel cells are generally classified into water-cooled fuel cells and air-cooled fuel cells. Both require sealing with adhesive tape during assembly to ensure that the fuel and oxidant gases are distributed across the entire surface of the membrane electrode assembly (MEA) without mixing. If the MEA is not properly sealed, the fuel and oxidant gases may mix inside the stack, causing a thermochemical reaction that can lead to the proton exchange membrane melting and ultimately stack failure. Furthermore, poor sealing can cause fuel or oxidant gases to leak out of the stack, reducing energy efficiency. In confined environments, the accumulated leaked hydrogen can also cause an explosion, posing a threat to nearby personnel and equipment.

[0003] The standard procedure involves first placing the bipolar plate flat on the designated position on the dispensing platform, then using a dispensing machine to apply adhesive to the bipolar plate according to the dispensing trajectory. Finally, the sealant line is laid flat on the dispensing area of ​​the bipolar plate. During the laying process, because the sealant line is generally made of materials such as silicone or EPDM rubber, which are relatively soft, it is difficult to control its positioning accurately, straightly, and evenly by hand. Misalignment, twisting, and even stretching or breaking of the sealant line often occur. Moreover, the laying position needs to be adjusted multiple times during the process, which easily causes adhesive to rub onto surrounding non-sealed areas, affecting the cleanliness of the bipolar plate. After the adhesive dries, it needs to be cleaned again, which is time-consuming and laborious. Utility Model Content

[0004] The purpose of this invention is to provide a quick-attachment and positioning fixture for fuel cell bipolar plate adhesive wires to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick-adhesion and positioning fixture for fuel cell bipolar plate adhesive lines, the fixture comprising a fixture base and a cover plate covering the fixture base, the upper surface of the fixture base being recessed downward to form an adhesive line positioning groove for accommodating the adhesive line, the depth of the adhesive line positioning groove being less than the thickness of the portion of the adhesive line protruding from the surface of the bipolar plate after being bonded to the bipolar plate, the fixture base forming a positioning structure with the bipolar plate and the cover plate respectively, the positioning structure being configured such that when the cover plate presses down on the bipolar plate, the adhesive line can be bonded within the adhesive line bonding groove of the bipolar plate.

[0006] Furthermore, the positioning structure includes a positioning pin disposed on the tooling base and positioning holes formed on the bipolar plate and the cover plate respectively.

[0007] Furthermore, the tooling base is rectangular, and two positioning pins are provided, which are respectively arranged at intervals on one of the diagonals of the tooling base.

[0008] Furthermore, the sealing adhesive line has a rectangular frame structure, and the positioning groove of the adhesive line is adapted to the shape of the sealing adhesive line.

[0009] Furthermore, the height of the locating pin is equal to the sum of the thicknesses of the cover plate and the bipolar plate.

[0010] Furthermore, a rectangular hollow groove is provided through the middle of the tooling base.

[0011] Furthermore, the positioning pin is disposed between the rectangular hollow groove and the adhesive line positioning groove.

[0012] Furthermore, when the cover plate is placed on the tooling base, the vertical projection of the cover plate completely covers the tooling base.

[0013] The beneficial effects of this utility model are as follows: This application sets a glue line positioning groove on the tooling base to accommodate and fix the sealing glue line, so as to facilitate glue application on the upper surface of the sealing glue line. The bipolar plate is pressed onto the tooling base by the cover plate, thereby realizing the bonding of the sealing glue line and the bipolar plate. This simplifies the bonding difficulty and improves the bonding efficiency. At the same time, by setting a positioning structure on the tooling base and the cover plate and the bipolar plate, the bipolar plate and the cover plate are positioned, thereby improving the bonding accuracy.

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a fuel cell bipolar plate adhesive wire quick-attachment positioning fixture according to an embodiment of this application;

[0016] Figure 2 for Figure 1 A schematic diagram of the cross-section of the tooling base. Detailed Implementation

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" 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.

[0021] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Please refer to Figures 1 to 2An embodiment of this application shows a quick-attachment and positioning fixture for fuel cell bipolar plate adhesive lines. The fixture includes a fixture base 10 and a cover plate 20 that covers the fixture base. The upper surface of the fixture base 10 is recessed to form an adhesive line positioning groove 11 for accommodating the adhesive line 30. The depth of the adhesive line positioning groove 11 is less than the thickness of the portion of the adhesive line 30 that protrudes from the surface of the bipolar plate 40 after being bonded to the bipolar plate 40. The fixture base 10 forms a positioning structure with the bipolar plate 40 and the cover plate 20 respectively. The positioning structure is configured such that when the cover plate 20 presses down on the bipolar plate 40, the adhesive line 30 can be bonded in the adhesive line bonding groove of the bipolar plate 40.

[0023] The sealing adhesive line 30 is fixed by the fixture base 10. Since the sealing adhesive line 30 has not yet been coated with adhesive, it is easy to spread evenly without causing adhesive overflow. After the sealing adhesive line 30 is laid, both the water-cooled and air-cooled bipolar plates 40 will have some warping and deformation, which may result in some areas not being firmly bonded. The cover plate 20 can flatly cover and press the bipolar plate 40 onto the sealing adhesive line 30, thereby ensuring that the sealing adhesive line 30 and the bipolar plate 40 are firmly bonded. In addition, considering that the deformation of the sealing adhesive line 30 during the pressing process may affect the bonding effect, the design depth of the adhesive line positioning groove 11 of the fixture base 10 should be slightly less than the thickness of the sealing adhesive line 30, depending on the situation. Preferably, the design depth of the adhesive line positioning groove 11 is equal to the thickness of the portion of the sealing adhesive line 30 that protrudes from the surface of the bipolar plate 40 after being pasted into the adhesive line groove of the bipolar plate 40, to ensure that there is a compression margin after the adhesive is applied, so that the sealing adhesive line 30 can be pressed firmly and bonded to the bipolar plate 40, and the sealing adhesive line 30 will not be excessively deformed.

[0024] In one embodiment, the positioning structure includes positioning pins 12 disposed on the tooling base 10 and positioning holes 50 formed on the bipolar plate 40 and the cover plate 20, respectively. The tooling base 10 is rectangular, and two positioning pins 12 are provided and are respectively spaced apart on one of the diagonals of the tooling base 10. The two positioning pins 12 disposed on the diagonals of the tooling base 10 facilitate the positioning of the bipolar plate 40. Admittedly, in other embodiments, more sets of positioning structures may be provided, which can be set as needed and are not specifically limited here.

[0025] In one embodiment, the sealing adhesive line 30 has a rectangular frame structure, and the adhesive line positioning groove 11 is adapted to the shape of the sealing adhesive line 30. By setting the adhesive line positioning groove 11 with a matching shape, it is convenient to position and fix the sealing adhesive line 30, thereby improving the bonding accuracy. The shapes of the sealing adhesive line 30 and the adhesive line positioning groove 11 can be set according to the sealing requirements of the bipolar plate 40, and are not specifically limited here.

[0026] In one embodiment, the height of the locating pin 12 is equal to the sum of the thicknesses of the cover plate 20 and the bipolar plate 40. With this configuration, when the bipolar plate 40 is covered by the cover plate 20, the degree of fit between the bipolar plate 40 and the sealing adhesive line 30 can be judged by the height of the locating pin 12 extending from the upper surface of the cover plate 20, thus preventing excessive deformation of the sealing adhesive line 30.

[0027] In one embodiment, a rectangular perforated groove 13 is provided through the middle of the tooling base 10. By providing the rectangular perforated groove 13, the weight of the tooling base 10 can be reduced, which facilitates the bonding operation.

[0028] In one embodiment, the positioning pin 12 is disposed between the rectangular hollow groove 13 and the adhesive line positioning groove 11. By disposing the positioning pin 12 between the rectangular hollow groove 13 and the adhesive line positioning groove 11, the thickness of the tooling base 10 outside the adhesive line positioning groove 11 can be reduced, thereby reducing the weight of the tooling base 10.

[0029] In one embodiment, when the cover plate 20 is placed on the tooling base 10, the vertical projection of the cover plate 20 completely covers the tooling base 10. This arrangement facilitates the complete covering of the bipolar plate 40 by the cover plate 20, preventing the bipolar plate 40 and the sealing adhesive line 30 from being poorly bonded.

[0030] The working principle of this fuel cell bipolar plate adhesive wire rapid bonding and positioning fixture is as follows: First, the sealing adhesive wire 30 is evenly laid in the adhesive wire positioning groove 11 of the fixture base 10. The fixture base 10, with the adhesive wire laid, is positioned at a designated location on the dispensing machine, and adhesive is evenly dispensed onto the sealing adhesive wire 30 according to the dispensing trajectory set in the program. After dispensing, the positioning holes 50 of the bipolar plate 40 are fitted with the positioning pins 12 on the fixture base 10, and the bipolar plate 40 is laid flat on the fixture base 10. The pressure plate is pressed onto the upper surface of the bipolar plate 40 through the positioning pins 12, so that the bipolar plate 40 and the sealing adhesive wire 30 are evenly bonded by the adhesive, thereby ensuring tight contact and firm adhesion between the adhesive wire and the plate. Finally, the fixture base 10, along with the dispensed bipolar plate 40, is removed and inverted to remove the bonded product from the fixture base 10.

[0031] This application achieves bonding between the sealing adhesive line and the bipolar plate by setting a positioning groove on the tooling base to accommodate and fix the sealing adhesive line, so as to facilitate the dispensing of adhesive on the upper surface of the sealing adhesive line, and pressing the bipolar plate onto the tooling base by the cover plate. This simplifies the bonding difficulty and improves the bonding efficiency. At the same time, by setting a positioning structure on the tooling base and the cover plate and the bipolar plate, the positioning of the bipolar plate and the cover plate is improved, thereby improving the bonding accuracy.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fuel cell bipolar plate adhesive tape rapid bonding positioning tool, characterized in that, The fuel cell bipolar plate adhesive line fast bonding positioning tooling includes a tooling base and a cover plate covering the tooling base, the upper surface of the tooling base is concave downward to form an adhesive line positioning groove for accommodating the sealing adhesive line, the depth of the adhesive line positioning groove is less than the thickness of the part of the sealing adhesive line protruding the surface of the bipolar plate after the sealing adhesive line is bonded on the bipolar plate, the positioning structure is formed between the tooling base and the bipolar plate and the cover plate respectively, and the positioning structure is configured to enable the sealing adhesive line to be bonded in the adhesive line bonding groove of the bipolar plate when the cover plate covers the bipolar plate.

2. The fuel cell bipolar plate adhesive taping positioning fixture of claim 1, wherein, The positioning structure includes positioning pins arranged on the tooling base and positioning holes formed on the bipolar plate and the cover plate respectively.

3. The fuel cell bipolar plate adhesive taping positioning fixture of claim 2, wherein, The tooling base is rectangular, and the positioning pins are arranged in two and are arranged on one diagonal line of the tooling base respectively.

4. The fuel cell bipolar plate adhesive taping positioning fixture of claim 3, wherein, The sealing adhesive line is a rectangular frame structure, and the adhesive line positioning groove is matched with the shape of the sealing adhesive line.

5. The fuel cell bipolar plate adhesive taping positioning fixture of claim 3, wherein, The height of the positioning pin is equal to the sum of the thicknesses of the cover plate and the bipolar plate.

6. The fuel cell bipolar plate adhesive taping positioning fixture of claim 3, wherein, A rectangular hollow groove is arranged through the middle of the tooling base.

7. The rapid bonding and positioning fixture for fuel cell bipolar plate adhesive lines as described in claim 6, characterized in that, The positioning pin is arranged between the rectangular hollow groove and the adhesive line positioning groove.

8. The fuel cell bipolar plate adhesive taping positioning fixture of claim 1, wherein, When the cover plate covers the tooling base, the projection of the cover plate in the vertical direction completely covers the tooling base.

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