Graphite bipolar plate pretreatment device and use method

Abstract

The invention discloses a graphite bipolar plate pretreatment device and a using method, and belongs to the technical field of graphite bipolar plate manufacturing, the graphite bipolar plate pretreatment device comprises a bottom plate, a mounting table is arranged in the middle of the bottom plate, and a prefabricated plate workpiece is arranged on the mounting table; cushion blocks are arranged on the two sides of the bottom plate correspondingly, sliding blocks are slidably connected to the cushion blocks on the two sides of the bottom plate, cutting structures are connected to the positions, close to the mounting table, of the sliding blocks, and the cutting structures can be driven by the sliding blocks to slide on the surface of the prefabricated plate workpiece. The side face of the bottom plate is connected with a side plate, a handle is arranged on the side plate and penetrates through the side plate through a plurality of connecting columns to be connected with a baffle, and the baffle abuts against the mounting table and can be driven by the handle to be close to or away from the mounting table. According to the device provided by the invention, surface pretreatment can be carried out on the prefabricated flexible graphite plate blank, and a continuous lamellar structure of the flexible graphite plate blank is broken, so that the flexible graphite plate blank can be more easily filled in a mold cavity in a later mold pressing process, and the surface quality of a formed graphite bipolar plate is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of graphite bipolar plate manufacturing, and in particular to a graphite bipolar plate pretreatment device and a use method thereof. Background Art

[0002] Flexible graphite is considered one of the most promising fuel cell plate substrates due to its good electrical and thermal conductivity, excellent corrosion resistance, easy molding and low price.

[0003] At present, in the process of pressing and forming the plate mold, the multi-layered flexible graphite plate is directly pressed to form a spine structure. Due to the poor fluidity of the flexible graphite plate itself, direct pressing will result in poor quality of the formed spine structure. Therefore, the spine structure of today's flexible graphite plate can usually only be designed with a shallow depth and a large width.

[0004] It is understandable that, affected by the depth, width and flow period of the flow field, when the design depth of the ridge structure is deeper and the width is narrower, the ridge structure is more difficult to form. The continuous layer structure on the surface of the flexible graphite sheet makes it difficult to fully fill the entire molding cavity, resulting in poor molding quality of the ridge structure, which in turn makes the subsequent filling process more difficult and the surface quality of the formed graphite bipolar plate is worse.

[0005] Therefore, in the current field of graphite bipolar plate manufacturing technology, how to avoid poor ridge molding quality during the molding process of flexible graphite sheet blanks under deep flow field and narrow ridge design conditions is one of the problems that need to be solved urgently. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a graphite bipolar plate pretreatment device and a method for using the same. The pretreatment device performs surface pretreatment on prefabricated flexible graphite slabs before the graphite bipolar plates are molded, thereby interrupting the continuous sheet structure of the flexible graphite slabs, making it easier for the flexible graphite slabs to be filled in the mold cavity during the subsequent mold pressing process, thereby ensuring the surface quality of the graphite bipolar plates after molding.

[0007] The technical solution of the present invention is as follows: In a first aspect of the present invention, a graphite bipolar plate pretreatment device is provided, comprising a base plate, a mounting platform is provided in the middle of the base plate, a prefabricated plate workpiece is arranged on the mounting platform; pads are provided on both sides of the base plate, sliders are slidably connected to the pads on both sides of the base plate, the sliders are connected to a cutting structure at a position close to the mounting platform, and the cutting structure can slide on the surface of the prefabricated plate workpiece under the drive of the slider; the side of the base plate is connected to a side plate, a handle is provided on the side plate, the handle passes through the side plate through a plurality of connecting columns to connect to a baffle, the baffle abuts the mounting platform, and the baffle can approach or move away from the mounting platform under the drive of the handle.

[0008] In some embodiments of the present invention, an arc-shaped groove structure is provided on the side of the mounting platform. In some embodiments of the present invention, connecting grooves are provided on both sides of the top of the bottom plate, and connecting keys are provided on the bottom of the cushion block, and the connecting keys of the cushion block are matched with the connecting grooves. In some embodiments of the present invention, the slider is arranged in a T-shaped structure, both ends of the cross beam of the T-shaped structure are slidably connected to the cushion block, and one end of the vertical beam of the T-shaped structure is connected to the cutting structure. In some embodiments of the present invention, a slide groove is provided on the top of the cushion block, and protrusion structures are provided at both ends of the crossbeam of the T-shaped structure. The protrusion structures are arranged in the slide groove so that the slider can move along the slide groove. In some embodiments of the present invention, a mounting groove is provided at one end of the vertical beam of the T-shaped structure close to the mounting platform, and the cutting structure includes a connecting end and a working end, the connecting end is arranged in the mounting groove, and the working end is arranged toward the mounting platform in a comb-like structure. In some embodiments of the present invention, a threaded hole is provided on the outside of the installation groove, and a clamping bolt is provided in the threaded hole. The clamping bolt can be close to or away from the connecting end of the cutting structure in the installation groove. In some embodiments of the present invention, the side panels are detachably connected to the bottom panel via a plurality of screws. In some embodiments of the present invention, a spring is provided on the connecting column between the side plate and the baffle. In a second aspect of the present invention, a method for using a graphite bipolar plate pretreatment device is provided, comprising: According to the depth of the spine structure to be processed on the surface of the prefabricated plate workpiece, a gasket is placed in the connection groove of the bottom plate, and the gasket is placed in the connection groove through the connection key to adjust the gasket to a reasonable height, and the raised structures at both ends of the beam of the T-shaped structure slider are set in the slide groove at the top of the gasket, so that the slider can move along the slide groove; Select a suitable cutting structure according to the shape of the spine structure required to be formed on the prefabricated plate workpiece, connect the connecting end of the cutting structure with the mounting groove provided on the vertical beam of the T-shaped structural slider, make the working end of the cutting structure face the mounting platform, screw the clamping bolt through the threaded hole into the connecting end of the cutting structure, and assemble the pretreatment device; Pull the handle to move the baffle away from the mounting platform, place the prefabricated panel workpiece on the mounting platform of the bottom plate, release the handle, and allow the baffle to approach and abut against the prefabricated panel workpiece under the action of the spring, so that the mounting platform and the baffle fix and limit the prefabricated panel workpiece; The control slide block moves to drive the cutting structure to achieve sliding cutting of the prefabricated plate workpiece; After the cutting is completed, the handle is pulled to move the baffle away from the prefabricated panel workpiece, and the prefabricated panel workpiece is removed through the arc-shaped groove structure on the side of the mounting table.

[0009] One or more technical solutions of the present invention have the following beneficial effects: The present invention provides a graphite bipolar plate pretreatment device and a method for using the same. The device performs surface pretreatment on a prefabricated plate workpiece of a flexible graphite plate blank before the graphite bipolar plate is molded, and the continuous sheet structure of the flexible graphite plate blank is interrupted, so that the flexible graphite plate blank is easier to fill in the mold cavity during the later mold pressing process, thereby ensuring the surface quality of the graphite bipolar plate after the plate is formed. Specifically, after the pretreatment device is assembled, the prefabricated plate workpiece is placed on the mounting table of the base plate, and the mounting table and the baffle plate fix and limit the prefabricated plate workpiece. The thin sheets in the connecting grooves on both sides of the base plate can be used to achieve fine-tuning of the cutting structure up and down. The depth of the surface treatment of the workpiece can be adjusted by fine-tuning the height of the cutting structure. Moreover, by controlling the slider to slide in the slide groove of the pad, the cutting structure can be made to slide relative to the surface of the prefabricated plate workpiece with limited position, which is convenient for interrupting the continuous sheet structure of the flexible graphite sheet blank, so that the flexible graphite sheet blank can be more easily filled in the mold cavity during the later mold pressing process. The slider in the present invention can be detachably connected to a variety of different cutting structures to meet the molding needs of graphite bipolar plates with different spine structures. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 An exploded schematic diagram of a graphite bipolar plate pretreatment device provided in Example 1 of the present invention; Figure 2 The overall structure of a graphite bipolar plate pretreatment device provided in Example 1 of the present invention is shown in FIG. Figure 1 ; Figure 3 The overall structure of a graphite bipolar plate pretreatment device provided in Example 1 of the present invention is shown in FIG. Figure 2 .

[0010] In the figure: 1. slider; 2. pad; 3. prefabricated plate workpiece; 4. baffle; 5. handle; 6. side panel; 7. screw; 8. bottom plate; 9. cutting structure; 10. mounting table; 11. connecting column; 12. slide groove; 13. connecting groove; 14. arc-shaped groove structure. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Example 1 In a typical embodiment of the present invention, a graphite bipolar plate pretreatment device is proposed, including a base plate 8, a mounting platform 10 is provided in the middle of the base plate 8, and a prefabricated plate workpiece 3 is arranged on the mounting platform 10; pads 2 are provided on both sides of the base plate 8, respectively, and sliders 1 are slidably connected to the pads 2 on both sides of the base plate 8, and the sliders 1 are connected to the cutting structure 9 at the position close to the mounting platform 10, and the cutting structure 9 can slide on the surface of the prefabricated plate workpiece 3 driven by the slider 1; the side of the base plate 8 is connected to the side plate 6, and a handle 5 is provided on the side plate 6, and the handle 5 passes through the side plate 6 through a plurality of connecting columns 11 to connect the baffle 4, and the baffle 4 abuts the mounting platform 10, and the baffle 4 can approach or move away from the mounting platform 10 driven by the handle 5.

[0013] Furthermore, an arc-shaped groove structure 14 is provided on the side of the mounting platform 10 .

[0014] In this embodiment, two arc-shaped groove structures 14 are vertically provided on the side of the mounting table 10. When the prefabricated panel workpiece 3 is placed on the mounting table 10, the prefabricated panel workpiece 3 will leak out at the arc-shaped groove structure 14. After processing is completed, the prefabricated panel workpiece 3 can be easily removed from the mounting table 10 through the arc-shaped groove structure 14.

[0015] Furthermore, connecting grooves 13 are provided on both sides of the top of the bottom plate 8 , and connecting keys are provided at the bottom of the cushion block 2 , and the connecting keys of the cushion block 2 are adapted to the connecting grooves 13 .

[0016] In this embodiment, the above arrangement facilitates setting the cushion block 2 on the bottom plate 8 . Meanwhile, a gasket of the same shape can be set in the connecting groove 13 , thereby achieving the purpose of adjusting the height of the cushion block 2 and further adjusting the height of the slider 1 .

[0017] Furthermore, the slider 1 is arranged in a T-shaped structure, the two ends of the horizontal beam of the T-shaped structure are slidably connected to the pad 2, and one end of the vertical beam of the T-shaped structure is connected to the cutting structure 9. Such an arrangement facilitates the control of the slider 1 sliding on the pad 2 to achieve the cutting of the prefabricated plate workpiece 3. In other embodiments of the present invention, the slider 1 can also be arranged in other shapes. Furthermore, a slide groove 12 is provided on the top of the cushion block 2 , and protruding structures are provided at both ends of the crossbeam of the T-shaped structure. The protruding structures are arranged in the slide groove 12 so that the slider 1 can move along the slide groove 12 .

[0018] In this embodiment, the stroke of the sliding block 1 in the sliding groove 12 is greater than or equal to the cutting stroke of the cutting structure 9 on the prefabricated board workpiece 3, thereby achieving sufficient sliding cutting of the prefabricated board workpiece 3.

[0019] Furthermore, a mounting groove is provided at one end of the vertical beam of the T-shaped structure close to the mounting platform 10 , and the cutting structure 9 includes a connecting end and a working end, the connecting end is arranged in the mounting groove, and the working end is arranged toward the mounting platform 10 in a comb-like structure. Furthermore, a threaded hole is provided on the outside of the installation groove, and a clamping bolt is provided in the threaded hole. The clamping bolt can be close to or away from the connection end of the cutting structure 9 in the installation groove.

[0020] In this embodiment, the connection end of the cutting structure 9 is set as a rectangular structure. After the rectangular structure is slid into the installation groove, the clamping bolts are tightened on the outside of the installation groove so that the cutting structure is stably installed in the installation groove.

[0021] In this embodiment, by detachably connecting the cutting structure 9, it is possible to select a suitable cutting structure 9 for cutting pretreatment according to the shape of the spine structure to be formed of the prefabricated plate workpiece 3 to meet the forming requirements of graphite bipolar plates with different spine structures.

[0022] Furthermore, the side plate 6 is detachably connected to the bottom plate 8 by a plurality of screws 7. Such arrangement facilitates the assembly and disassembly of the device and facilitates carrying and transportation. Furthermore, a spring is provided on the connecting column 11 between the side plate 6 and the baffle plate 4 .

[0023] In this embodiment, a spring is arranged on the connecting column 11 between the side plate 6 and the baffle 4 so that a certain pre-tightening elastic force exists between the side plate 6 and the baffle 4. By pulling the handle 5 and cooperating with the spring, the baffle 4 can be pressed against the prefabricated plate workpiece 3, thereby achieving compression and limiting of the prefabricated plate workpiece 3.

[0024] In a second aspect of the present invention, a method for using a graphite bipolar plate pretreatment device is provided, comprising: According to the depth of the spine structure to be processed on the surface of the prefabricated plate workpiece 3, a gasket is placed in the connection groove 13 of the bottom plate 8, and the cushion block 2 is placed in the connection groove 13 through the connection key to adjust the cushion block 2 to a reasonable height, and the protruding structures at both ends of the crossbeam of the T-shaped structure slider 1 are set in the slide groove 12 at the top of the cushion block 2, so that the slider 1 can move along the slide groove 12; Select a suitable cutting structure 9 according to the shape of the spine structure to be formed of the prefabricated plate workpiece 3, connect the connecting end of the cutting structure 9 to the mounting groove provided on the vertical beam of the T-shaped structural slider 1, make the working end of the cutting structure 9 face the mounting platform 10, screw the clamping bolt through the threaded hole into the connecting end of the cutting structure 9, and assemble the pretreatment device; Pull the handle 5 to move the baffle 4 away from the mounting platform 10, place the prefabricated panel workpiece 3 on the mounting platform 10 of the bottom plate 8, release the handle 5, and make the baffle 4 approach and abut against the prefabricated panel workpiece 3 under the action of the spring, so that the mounting platform 10 and the baffle 4 fix and limit the prefabricated panel workpiece 3; The control slide block 1 moves to drive the cutting structure 9 to achieve sliding cutting of the prefabricated plate workpiece 3; After the cutting is completed, the handle 5 is pulled to move the baffle plate 4 away from the prefabricated plate workpiece 3, and the prefabricated plate workpiece 3 is removed through the arc-shaped groove structure 14 on the side of the mounting platform 10.

[0025] The present invention provides a graphite bipolar plate pretreatment device and a method for using the same. The prefabricated plate workpiece 3 of the flexible graphite plate blank is subjected to surface pretreatment before the graphite bipolar plate is molded, and the continuous sheet structure of the flexible graphite plate blank is interrupted, so that the flexible graphite plate blank is easier to fill in the mold cavity during the later mold pressing process, thereby ensuring the surface quality of the graphite bipolar plate after the plate is formed. Specifically, after the pretreatment device is assembled, the prefabricated board workpiece 3 is placed on the mounting table 10 of the base plate 8. The mounting table 10 and the baffle 4 fix and limit the prefabricated board workpiece 3. The thin sheets in the connecting grooves 13 on both sides of the base plate 8 can achieve fine-tuning of the cutting structure 9 up and down. By fine-tuning the height of the cutting structure 9, the depth of the surface treatment of the workpiece can be adjusted. By controlling the slider 1 to slide in the slide groove 12 of the pad 2, the cutting structure 9 can be made to slide relative to the surface of the prefabricated board workpiece 3 with limited position, which is convenient for interrupting the continuous sheet structure of the flexible graphite slab, so that the flexible graphite slab is easier to fill in the mold cavity during the later mold pressing process.

[0026] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A graphite bipolar plate pretreatment device, characterized in that: It includes a base plate, a mounting platform is provided in the middle of the base plate, and a prefabricated panel workpiece is placed on the mounting platform; pads are provided on both sides of the base plate, and sliders are slidably connected to the pads on both sides of the base plate, and the sliders are connected to a cutting structure at positions close to the mounting platform, and the cutting structure can slide on the surface of the prefabricated panel workpiece under the drive of the sliders; the sides of the base plate are connected to side plates, and handles are provided on the side plates, and the handles pass through the side plates through a plurality of connecting columns to connect to baffles, and the baffles abut against the mounting platform, and the baffles can approach or move away from the mounting platform under the drive of the handles.

2. A graphite bipolar plate pretreatment device according to claim 1, characterized in that: An arc-shaped groove structure is provided on the side of the mounting platform.

3. A graphite bipolar plate pretreatment device according to claim 1, characterized in that: Connecting grooves are arranged on both sides of the top of the bottom plate, and connecting keys are arranged on the bottom of the cushion block, and the connecting keys of the cushion block are matched with the connecting grooves.

4. A graphite bipolar plate pretreatment device according to claim 1, characterized in that: The sliding block is arranged in a T-shaped structure, both ends of the cross beam of the T-shaped structure are slidably connected with the cushion block, and one end of the vertical beam of the T-shaped structure is connected to the cutting structure.

5. A graphite bipolar plate pretreatment device as claimed in claim 4, characterized in that: A slide groove is provided on the top of the cushion block, and protruding structures are provided at both ends of the crossbeam of the T-shaped structure. The protruding structures are arranged in the slide groove so that the slider can move along the slide groove.

6. A graphite bipolar plate pretreatment device as claimed in claim 4, characterized in that: A mounting groove is provided at one end of the vertical beam of the T-shaped structure close to the mounting platform. The cutting structure includes a connecting end and a working end. The connecting end is arranged in the mounting groove, and the working end is arranged toward the mounting platform in a comb-shaped structure.

7. A graphite bipolar plate pretreatment device as claimed in claim 6, characterized in that: A threaded hole is arranged on the outside of the installation groove, and a clamping bolt is arranged in the threaded hole. The clamping bolt can be close to or away from the connecting end of the cutting structure in the installation groove.

8. A graphite bipolar plate pretreatment device according to claim 1, characterized in that: The side plate is detachably connected to the bottom plate via a plurality of screws.

9. A graphite bipolar plate pretreatment device according to claim 1, characterized in that: A spring is arranged on the connecting column between the side plate and the baffle plate.

10. A method for using a graphite bipolar plate pretreatment device according to any one of claims 1 to 9, characterized in that: include: According to the structural depth required to be processed on the surface of the prefabricated plate workpiece, a gasket is placed in the connection groove of the bottom plate, and the gasket is placed in the connection groove through the connection key to adjust the gasket to a reasonable height, and the raised structures at both ends of the beam of the T-shaped structural slider are set in the slide groove at the top of the gasket, so that the slider can move along the slide groove; Select a suitable cutting structure according to the spine structure required to be formed by the prefabricated plate workpiece, connect the connecting end of the cutting structure with the mounting groove provided on the vertical beam of the T-shaped structural slider, make the working end of the cutting structure face the mounting platform, screw the clamping bolt through the threaded hole into the connecting end of the cutting structure, and assemble the pretreatment device; Pull the handle to move the baffle away from the mounting platform, place the prefabricated panel workpiece on the mounting platform of the bottom plate, release the handle, and allow the baffle to approach and abut against the prefabricated panel workpiece under the action of the spring, so that the mounting platform and the baffle fix and limit the prefabricated panel workpiece; The control slide block moves to drive the cutting structure to achieve sliding cutting of the prefabricated plate workpiece; After the cutting is completed, the handle is pulled to move the baffle away from the prefabricated panel workpiece, and the prefabricated panel workpiece is removed through the arc-shaped groove structure on the side of the mounting table.

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