A device for graphite bipolar plate glue spraying curing

Abstract

The present application relates to a kind of device for graphite bipolar plate glue spraying curing, including rack, setting on the glue spraying component of the rack, curing component and transfer platform;The glue spraying component is set on glue spraying station, including freely movable glue valve clamping rod, and the glue spraying valve being set at the end of the glue valve clamping rod;The curing component is set on curing station, including lifting cylinder, and UV lamp cover being connected with the lifting cylinder and being lifted up and down along with it, the inner wall of the UV lamp cover is also provided with UV lamp for curing glue film;The transfer platform includes the platform plate for placing the part to be sprayed, the slider for supporting the platform plate, and the drive cylinder being connected with the slider and being used to drive it to move back and forth between glue spraying station and curing station.Compared with the prior art, the graphite bipolar plate is sprayed with light curing glue around, and is cured, to avoid the problem of graphite bipolar plate falling in subsequent process, thereby avoiding the short circuit problem of fuel cell stack.

Description

Technical Field

[0001] This invention relates to the field of fuel cell manufacturing, and in particular to an apparatus for spray-curing graphite bipolar plates. Background Technology

[0002] Bipolar plates are one of the core components of proton exchange membrane fuel cells (PEMFCs). Their main function is to transport gases through surface flow fields and collect and conduct the current, heat, and water generated in the reaction. Depending on the material type, they account for approximately 60%-80% of the weight of a PEMFC stack and about 30% of its cost. Considering the functional requirements of bipolar plates and the acidic electrochemical reaction environment of PEMFCs, high requirements are placed on bipolar plates for conductivity, airtightness, mechanical properties, and corrosion resistance. Currently, bipolar plates are mainly classified into three types based on materials: graphite plates, composite plates, and metal plates. Graphite bipolar plates are currently the most commonly used bipolar plates in PEMFCs, exhibiting good electrical and thermal conductivity, stability, and corrosion resistance. However, their relatively poor mechanical properties, brittleness, and difficulty in machining lead to higher costs, which troubles manufacturers. While graphite bipolar plates have achieved mass production, most are machined, and the problems encountered are unavoidable. Alternatively, die casting or expanded graphite molding can be used directly. Currently, a flexible graphite plate molding technology is used, but after the graphite plate is cut, some debris will fall off the edges. Usually, a brush is used to remove the debris, but the problem is that brushing is inefficient and debris will still be generated and fall off in subsequent processes, causing micro-short circuits in the entire fuel cell stack. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects in the prior art that cause micro-short circuits in the entire fuel cell stack due to chipping of graphite plates during processing, and to provide a device for spraying adhesive to cure graphite bipolar plates.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] The technical solution of the present invention is to provide an apparatus for spraying adhesive and curing graphite bipolar plates, comprising a frame, an adhesive spraying assembly, a curing assembly and a transfer platform disposed on the frame;

[0006] The glue spraying assembly is located at the glue spraying station and includes a freely movable glue valve clamping rod and a glue spraying valve located at the end of the glue valve clamping rod. The glue spraying valve is also connected to a glue spraying pipe for conveying glue raw materials.

[0007] The curing assembly is located at the curing station and includes a lifting cylinder and a UV lamp cover connected to the lifting cylinder and moving up and down with it. The inner wall of the UV lamp cover is also provided with a UV lamp for curing the adhesive film.

[0008] The transfer platform includes a platform plate for placing the parts to be glued, a slider for supporting the platform plate, and a drive cylinder connected to the slider and used to drive it to move back and forth between the glue spraying station and the curing station.

[0009] Furthermore, the adhesive valve clamping rod includes a first link, a second link, a third link, and a fourth link connected in sequence. The second link, hinged to the first link, drives the adhesive spray valve to move horizontally; the third link, hinged to the second link, drives the adhesive spray valve to move vertically; and the fourth link, hinged to the third link, drives the adhesive spray valve to move vertically. The horizontal movement of the second link causes the adhesive spray valve to swing horizontally and spray the sidewalls of the part to be coated. The vertical movement of the third link causes the adhesive spray valve to swing vertically and spray the sidewalls of the part to be coated. The vertical movement of the fourth link finely adjusts the adhesive spray valve, ultimately achieving all-around coating of the four sidewalls of the part to be coated.

[0010] Furthermore, the UV lamps are provided in four units.

[0011] Furthermore, the UV lamps are respectively installed on the inner sidewalls of the UV lamp cover, enabling omnidirectional photocuring of the adhesive film on the sidewalls of the graphite bipolar plate.

[0012] Furthermore, the part to be coated with adhesive includes at least one graphite bipolar plate.

[0013] Furthermore, when the part to be coated with adhesive comprises multiple graphite bipolar plates, the device is also provided with a stacking assembly to assemble the graphite bipolar plates.

[0014] Furthermore, the stacking assembly includes a base plate and a cover plate, with the graphite bipolar plate stacked between the base plate and the cover plate.

[0015] Furthermore, the base plate and the cover plate are fixed together by bolts.

[0016] Furthermore, at least 50 graphite bipolar plates are stacked between the base plate and the cover plate.

[0017] Furthermore, the adhesive raw material is a light-curing adhesive.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention is simple to operate, and multiple graphite bipolar plates can be operated at the same time, which improves work efficiency.

[0020] (2) In this invention, the graphite bipolar plate is sprayed with light-curing adhesive around its perimeter and cured by UV lamp, which avoids the problem of graphite bipolar plate shedding in subsequent processes, thereby avoiding short circuit problems in fuel cell stacks. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Example 1.

[0022] Figure 2 This is a schematic diagram of the structure of Example 2.

[0023] The diagram is labeled as follows:

[0024] 1-Glue valve clamping rod; 101-First connecting rod; 102-Second connecting rod; 103-Third connecting rod; 104-Fourth connecting rod; 2-Transplanting platform; 201-Platform plate; 202-Slider; 3-Stacking assembly; 301-Base plate; 302-Cover plate; 4-Curing assembly; 401-UV lamp; 402-Lifting cylinder; 403-UV lamp cover; 5-Glue spray valve. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] In the following embodiments, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0027] Example 1

[0028] like Figure 1-2 As shown, an apparatus for spraying adhesive to cure graphite bipolar plates includes a frame, a spraying assembly, a curing assembly 4, and a transfer platform 2 mounted on the frame. The adhesive spraying assembly is located at the adhesive spraying station and includes a freely movable adhesive valve clamping rod 1 and an adhesive spraying valve 5 located at the end of the adhesive valve clamping rod 1. The adhesive spraying valve 5 is also connected to an adhesive spraying pipe for conveying UV-curable adhesive. The curing assembly 4 is located at the curing station and includes a lifting cylinder 402 and a UV lamp cover 403 connected to the lifting cylinder 402 and raised and lowered with it. The inner walls of the UV lamp cover 403 are also equipped with four UV lamps 401 for curing the adhesive film, so as to achieve all-round UV curing of the adhesive film on the side walls of the graphite bipolar plate 303. The transfer platform 2 includes a platform plate 201 for placing a graphite bipolar plate 303, a slider 202 supporting the platform plate 201, and a drive cylinder connected to the slider 202 for driving it to move back and forth between the adhesive spraying station and the curing station.

[0029] The adhesive valve clamping rod 1 includes a first connecting rod 101, a second connecting rod 102, a third connecting rod 103, and a fourth connecting rod 104 connected in sequence. The second connecting rod 102, hinged to the first connecting rod 101, drives the adhesive spraying valve 5 to move in the horizontal plane; the third connecting rod 103, hinged to the second connecting rod 102, drives the adhesive spraying valve 5 to move in the vertical plane; and the fourth connecting rod 104, hinged to the third connecting rod 103, drives the adhesive spraying valve 5 to move in the vertical plane. The movement of the second connecting rod 102 in the horizontal plane causes the adhesive spraying valve 5 to swing horizontally and spray the sidewalls of the graphite bipolar plate 303. The movement of the third connecting rod 103 in the vertical plane causes the adhesive spraying valve 5 to swing vertically and spray the sidewalls of the graphite bipolar plate 303. The movement of the fourth connecting rod 104 in the vertical plane finely adjusts the adhesive spraying valve 5, ultimately achieving all-around spraying of the four sidewalls of the graphite bipolar plate 303.

[0030] In use, the graphite bipolar plate 303 is placed on the platform plate 201. The cylinder is activated, and the slider 202 moves the platform plate 201, transferring the graphite bipolar plate 303 to the adhesive spraying station. The adhesive spraying controller controls the amount of adhesive sprayed from the adhesive spraying valve 5. The adhesive valve clamping rod 1 drives the adhesive spraying valve 5 to spray the graphite bipolar plate 303 from bottom to top. After spraying, the slider 202 moves the platform plate 201 to the curing station. The UV lamp cover 403 descends under the push of the lifting cylinder 402 to cover the graphite bipolar plate 303. The UV lamp 401 is then turned on for photocuring. After curing, the UV lamp cover 403 rises under the push of the lifting cylinder 402, completing the adhesive spraying and curing process. After forming a rubber ring at the edge of the graphite bipolar plate 303, it can prevent existing debris from falling off and also prevent the graphite bipolar plate 303 from falling off again during transportation and assembly, thus solving the micro short circuit problem caused by graphite debris falling off.

[0031] Example 2

[0032] An apparatus for spray-curing graphite bipolar plates is identical to the one described in Example 1, except that the graphite bipolar plate 303 is replaced with the stacked assembly 3.

[0033] The stacking assembly 3 is used to assemble graphite bipolar plates 303 and is placed on the platform plate 201. The stacking assembly 3 includes a base plate 301 and a cover plate 302. Fifty graphite bipolar plates 303 are stacked between the base plate 301 and the cover plate 302. The base plate 301 and the cover plate 302 are fixed together by bolts.

[0034] In use, 50 graphite bipolar plates 303 are stacked between a base plate 301 and a cover plate 302, and the base plate 301 and cover plate 302 are fixed with bolts, forming the stack assembly 1. The stack assembly 1 is placed on a platform plate 201. The cylinder is activated, and the slider 202 slides, moving the platform plate 201 to transfer the stack assembly 1 to the glue spraying station. The glue spraying controller controls the glue spraying volume of the glue spraying valve 5. The glue valve clamping rod 1 drives the glue spraying valve 5 to spray the four sides of the graphite bipolar plates 303 in the stack assembly 1 from bottom to top. After spraying, the slider 202 slides, moving the platform plate 201 to the curing station. The UV lamp cover 403 is lowered by the lifting cylinder 402 to cover the stack assembly 1, and the UV lamp 401 is turned on for light curing. After curing, the UV lamp cover 403 is raised by the lifting cylinder 402, completing the glue spraying and curing process. After forming a rubber ring at the edge of the graphite bipolar plate 303, it can prevent existing debris from falling off and also prevent the graphite bipolar plate 303 from falling off again during transportation and assembly, thus solving the micro short circuit problem caused by graphite debris falling off.

[0035] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. An apparatus for spray-curing adhesives on graphite bipolar plates, characterized in that, Includes a frame, a spray adhesive assembly mounted on the frame, a curing assembly (4), and a transfer platform (2); The glue spraying assembly is located at the glue spraying station. It includes a freely movable glue valve clamping rod (1) and a glue spraying valve (5) located at the end of the glue valve clamping rod (1). The glue spraying valve (5) is also connected to a glue spraying pipe for conveying glue raw material. The glue raw material is a light-curing glue. The curing component (4) is located at the curing station and includes a lifting cylinder (402) and a UV lamp cover (403) connected to the lifting cylinder (402) and raised and lowered with it. The inner wall of the UV lamp cover (403) is also provided with a UV lamp (401) for curing the adhesive film. The transfer platform (2) includes a platform plate (201) for placing the part to be sprayed with glue, a slider (202) for supporting the platform plate (201), and a drive cylinder connected to the slider (202) for driving it to move back and forth between the glue spraying station and the curing station. The part to be sprayed with glue includes at least one graphite bipolar plate (303). The glue valve clamping rod (1) includes a first connecting rod (101), a second connecting rod (102), a third connecting rod (103), and a fourth connecting rod (104) connected in sequence. The second connecting rod (102) drives the glue spraying valve (5) to move in the horizontal plane by hinged to the first connecting rod (101); the third connecting rod (103) drives the glue spraying valve (5) to move in the vertical plane by hinged to the second connecting rod (102); and the fourth connecting rod (104) drives the glue spraying valve (5) to move in the vertical plane by hinged to the third connecting rod (103). When the part to be coated with adhesive contains multiple graphite bipolar plates (303), the device is further provided with a stacking assembly (3) to assemble the graphite bipolar plates (303).

2. The apparatus for spray-curing graphite bipolar plates according to claim 1, characterized in that, The UV lamp (401) is provided in four units.

3. The apparatus for spray-curing graphite bipolar plates according to claim 2, characterized in that, The UV lamps (401) are respectively installed on the inner sidewalls of the UV lamp cover (403).

4. The apparatus for spray-curing graphite bipolar plates according to claim 1, characterized in that, The stacking assembly (3) includes a base plate (301) and a cover plate (302), and the graphite bipolar plate (303) is stacked between the base plate (301) and the cover plate (302).

5. The apparatus for spray-curing graphite bipolar plates according to claim 4, characterized in that, The base plate (301) and the cover plate (302) are fixed together by bolts.

6. The apparatus for spray-curing graphite bipolar plates according to claim 4, characterized in that, At least 50 graphite bipolar plates (303) are stacked between the base plate (301) and the cover plate (302).

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