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 present invention relates to the technical field of graphite bipolar plate manufacturing, and particularly relates to a graphite bipolar plate pretreatment device and a usage method thereof. Background Art

[0002] Flexible graphite is regarded as one of the most potential fuel cell bipolar plate base materials due to its good electrical and thermal conductivity characteristics, excellent corrosion resistance, easy formability, and low price.

[0003] Currently, during the process of pressing and forming a flexible graphite plate blank in a bipolar plate mold, a multi-layer flexible graphite plate blank is directly molded into a ridge structure by die pressing. Since the fluidity of the flexible graphite plate blank itself is poor, direct die pressing will result in a poor quality of the formed ridge structure. Therefore, the ridge structure of the current flexible graphite bipolar plate usually can only be designed with a relatively shallow depth and a relatively large width.

[0004] It can be understood that affected by the depth, width of the flow field, and the flow channel period, when the designed depth of the ridge structure is deeper and the width is narrower, the forming of the ridge structure becomes more difficult. The continuous sheet structure on the surface of the flexible graphite plate blank makes it difficult to fully fill the entire die pressing cavity, resulting in a poor forming quality of the ridge structure, and further leading to more difficulties in the subsequent filling process and a poorer surface quality of the formed graphite bipolar plate.

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

[0006] Aiming at the problems existing in the prior art, the present invention provides a graphite bipolar plate pretreatment device and a usage method thereof. The pretreatment device performs surface pretreatment on a prefabricated flexible graphite plate blank before die pressing the graphite bipolar plate, breaks the continuous sheet structure of the flexible graphite plate blank, makes it easier for the flexible graphite plate blank to be filled in the die cavity during the subsequent die pressing process, and ensures the surface quality of the bipolar plate after the graphite bipolar plate is formed.

[0007] The technical solution of the present invention is as follows:

[0008] In a first aspect of the present invention, a pretreatment device for a graphite bipolar plate is provided, including a bottom plate. An installation table is provided in the middle of the bottom plate, and a prefabricated plate workpiece is arranged on the installation table. On both sides of the bottom plate, there are cushion blocks respectively. Sliders are slidably connected to the cushion blocks on both sides of the bottom plate. A cutting structure is connected to the position of the slider close to the installation table, and the cutting structure can slide on the surface of the prefabricated plate workpiece driven by the slider. A side plate is connected to the side surface of the bottom plate, and a handle is provided on the side plate. The handle passes through the side plate through a plurality of connecting columns to connect a baffle plate, and the baffle plate abuts against the installation table. The baffle plate can approach or move away from the installation table driven by the handle.

[0009] In some embodiments of the present invention, an arc-shaped groove structure is provided on the side surface of the installation table.

[0010] 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 at the bottom of the cushion blocks. The connecting keys of the cushion blocks are adapted to the connecting grooves.

[0011] In some embodiments of the present invention, the slider is arranged in a T-shaped structure. The two ends of the cross beam of the T-shaped structure are slidably connected to the cushion blocks, and one end of the vertical beam of the T-shaped structure is connected to the cutting structure.

[0012] In some embodiments of the present invention, a sliding groove is provided at the top of the cushion block, and convex structures are provided at both ends of the cross beam of the T-shaped structure. The convex structures are arranged in the sliding groove so that the slider can move along the sliding groove.

[0013] In some embodiments of the present invention, an installation groove is provided at one end of the vertical beam of the T-shaped structure close to the installation table. The cutting structure includes a connecting end and a working end. The connecting end is arranged in the installation groove, and the working end is arranged in a comb-shaped structure facing the installation table.

[0014] In some embodiments of the present invention, a threaded hole is provided outside the installation groove, and a pressing bolt is arranged in the threaded hole. The pressing bolt can approach or move away from the connecting end of the cutting structure in the installation groove.

[0015] In some embodiments of the present invention, the side plate is detachably connected to the bottom plate through a plurality of screws.

[0016] In some embodiments of the present invention, a spring is provided on the connecting column between the side plate and the baffle plate.

[0017] In a second aspect of the present invention, a method for using a pretreatment device for a graphite bipolar plate is provided, including:

[0018] According to the depth of the ridge structure to be processed on the surface of the precast slab workpiece, place a gasket in the connection groove of the bottom plate. Place the cushion block into the connection groove through the connection key to adjust the cushion block to a reasonable height. Set the protruding structures at both ends of the cross beam of the T-shaped structure slider in the sliding groove at the top of the cushion block so that the slider can move along the sliding groove;

[0019] Select a suitable cutting structure according to the shape of the ridge structure to be formed on the precast slab workpiece. Connect the connection end of the cutting structure to the installation groove provided on the vertical beam of the T-shaped structure slider, make the working end of the cutting structure face the installation table, and screw the pressing bolt into the threaded hole to tighten the connection end of the cutting structure to assemble the pretreatment device;

[0020] Pull the handle to move the baffle away from the installation table, place the precast slab workpiece on the installation table of the bottom plate, and release the handle to make the baffle approach and abut against the precast slab workpiece under the action of the spring. The installation table and the baffle fix and limit the precast slab workpiece;

[0021] Control the movement of the slider to drive the cutting structure to realize the sliding cutting of the precast slab workpiece;

[0022] After cutting is completed, pull the handle to move the baffle away from the precast slab workpiece, and remove the precast slab workpiece through the arc-shaped groove structure on the side of the installation table.

[0023] One or more technical solutions of the present invention have the following beneficial effects:

[0024] The graphite bipolar plate pretreatment device and its use method provided by the present invention perform surface pretreatment on the precast slab workpiece of the flexible graphite slab blank before the graphite bipolar plate is molded, break the continuous sheet layer structure of the flexible graphite slab blank, so that the flexible graphite slab blank is more likely to be filled in the mold cavity during the later mold pressing process, and ensure the surface quality of the bipolar plate after the graphite bipolar plate is formed;

[0025] Specifically, after the pretreatment device is assembled, by placing the precast slab workpiece on the installation table of the bottom plate, the installation table and the baffle fix and limit the precast slab workpiece. Lining thin sheets in the connection grooves on both sides of the bottom plate can realize the up and down fine adjustment of the cutting structure. By finely adjusting the height of the cutting structure, the depth of its surface treatment of the workpiece can be adjusted, and by controlling the slider to slide in the sliding groove of the cushion block, it can be realized that the cutting structure makes a limited relative sliding on the surface of the precast slab workpiece, which is convenient for breaking the continuous sheet layer structure of the flexible graphite slab blank, so that the flexible graphite slab blank is more likely to be filled in the mold cavity during the later mold pressing process;

[0026] In the present invention, the slider is detachably connected to a variety of different cutting structures to meet the forming requirements of graphite bipolar plates with different ridge structures. Description of the Drawings

[0027] Figure 1 Explosion schematic diagram of a graphite bipolar plate pretreatment device provided in Embodiment 1 of the present invention;

[0028] Figure 2 Overall structure schematic of a graphite bipolar plate pretreatment device provided in Embodiment 1 of the present invention Figure 1 ;

[0029] Figure 3 Overall structure schematic of a graphite bipolar plate pretreatment device provided in Embodiment 1 of the present invention Figure 2 。

[0030] In the figure: 1, slider; 2, cushion block; 3, prefabricated plate workpiece; 4, baffle; 5, handle; 6, side plate; 7, screw; 8, bottom plate; 9, cutting structure; 10, installation table; 11, connecting column; 12, sliding groove; 13, connecting groove; 14, arc-shaped groove structure. Specific embodiments

[0031] The present invention will be further described below in conjunction with the drawings and embodiments.

[0032] Embodiment 1

[0033] In a typical embodiment of the present invention, a graphite bipolar plate pretreatment device is proposed, including a bottom plate 8. An installation table 10 is provided in the middle of the bottom plate 8, and a prefabricated plate workpiece 3 is arranged on the installation table 10; cushion blocks 2 are respectively provided on both sides of the bottom plate 8, and sliders 1 are slidably connected to the cushion blocks 2 on both sides of the bottom plate 8. A cutting structure 9 is connected to the position of the slider 1 close to the installation table 10, and the cutting structure 9 can slide on the surface of the prefabricated plate workpiece 3 under the drive of the slider 1; the side of the bottom plate 8 is connected to a side plate 6, and a handle 5 is provided on the side plate 6. The handle 5 is connected to a baffle 4 through a plurality of connecting columns 11 passing through the side plate 6, and the baffle 4 abuts against the installation table 10. The baffle 4 can approach or move away from the installation table 10 under the drive of the handle 5.

[0034] Furthermore, an arc-shaped groove structure 14 is provided on the side of the installation table 10.

[0035] In this embodiment, two arc-shaped groove structures 14 are vertically provided on the side of the installation table 10. When the prefabricated plate workpiece 3 is placed on the installation table 10, the prefabricated plate workpiece 3 will leak out at the arc-shaped groove structure 14. After processing, it is convenient to remove the prefabricated plate workpiece 3 from the installation table 10 through the arc-shaped groove structure 14.

[0036] 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 blocks 2. The connecting keys of the cushion blocks 2 are adapted to the connecting grooves 13.

[0037] In this embodiment, through the above settings, it is convenient to set the spacer block 2 on the bottom plate 8. At the same time, gaskets with the same shape can be set in the connecting groove 13, so as to achieve the purpose of adjusting the height of the spacer block 2, and further adjust the height of the slider 1.

[0038] Furthermore, the slider 1 is arranged in a T-shaped structure. Both ends of the cross beam of the T-shaped structure are slidably connected to the spacer block 2, and one end of the vertical beam of the T-shaped structure is connected to the cutting structure 9. With such a setting, it is convenient to control the slider 1 to slide on the spacer block 2 to realize the cutting of the precast slab workpiece 3. In other embodiments of the present invention, the slider 1 can also be set in other shapes.

[0039] Furthermore, a chute 12 is provided at the top of the spacer block 2, and convex structures are provided at both ends of the cross beam of the T-shaped structure. The convex structures are arranged in the chute 12 so that the slider 1 can move along the chute 12.

[0040] In this embodiment, the travel of the slider 1 in the chute 12 is greater than or equal to the cutting travel of the cutting structure 9 for the precast slab workpiece 3, so as to realize the full sliding cutting of the precast slab workpiece 3.

[0041] Furthermore, an installation groove is provided at one end of the vertical beam of the T-shaped structure close to the installation table 10. The cutting structure 9 includes a connection end and a working end. The connection end is arranged in the installation groove, and the working end is arranged in a comb-like structure facing the installation table 10.

[0042] Furthermore, a threaded hole is provided outside the installation groove, and a pressing bolt is arranged in the threaded hole. The pressing bolt can approach or move away from the connection end of the cutting structure 9 in the installation groove.

[0043] In this embodiment, the connection end of the cutting structure 9 is set as a rectangular structure. After the rectangular structure is slidably arranged in the installation groove, the pressing bolt is tightened outside the installation groove, so that the cutting structure is stably installed in the installation groove.

[0044] 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 ridge structure required for the precast slab workpiece 3, so as to meet the forming requirements of different ridge structure graphite bipolar plates.

[0045] Furthermore, the side plate 6 is detachably connected to the bottom plate 8 through a plurality of screws 7. With such a setting, it is convenient for the assembly and disassembly of the device and convenient for carrying and transportation.

[0046] Furthermore, a spring is provided on the connecting column 11 between the side plate 6 and the baffle 4.

[0047] In this embodiment, by setting a spring on the connecting column 11 between the side plate 6 and the baffle 4, 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, it is convenient to make the baffle 4 abut against the precast workpiece 3, so as to realize the pressing and limiting of the precast workpiece 3.

[0048] In the second aspect of the present invention, a method for using a graphite bipolar plate pretreatment device is provided, including:

[0049] According to the depth of the ridge structure to be processed on the surface of the precast workpiece 3, place a gasket in the connecting groove 13 of the bottom plate 8, place the cushion block 2 into the connecting groove 13 through the connecting key to adjust the cushion block 2 to a reasonable height, and set the convex structures at both ends of the cross beam of the T-shaped structure slider 1 in the sliding groove 12 at the top of the cushion block 2, so that the slider 1 can move along the sliding groove 12;

[0050] Select a suitable cutting structure 9 according to the shape of the ridge structure to be formed on the precast workpiece 3, connect the connecting end of the cutting structure 9 to the installation groove provided on the vertical beam of the T-shaped structure slider 1, make the working end of the cutting structure 9 face the installation table 10, screw the pressing bolt into the threaded hole to abut against the connecting end of the cutting structure 9, and assemble the pretreatment device;

[0051] Pull the handle 5 to make the baffle 4 away from the installation table 10, place the precast workpiece 3 on the installation table 10 of the bottom plate 8, release the handle 5, and make the baffle 4 approach and abut against the precast workpiece 3 under the action of the spring. The installation table 10 and the baffle 4 fix and limit the precast workpiece 3;

[0052] Control the movement of the slider 1 to drive the cutting structure 9 to realize the sliding cutting of the precast workpiece 3;

[0053] After cutting is completed, pull the handle 5 to make the baffle 4 away from the precast workpiece 3, and remove the precast workpiece 3 through the arc-shaped groove structure 14 on the side of the installation table 10.

[0054] The graphite bipolar plate pretreatment device and the using method provided by the present invention perform surface pretreatment on the precast workpiece 3 of the flexible graphite slab before the graphite bipolar plate is molded, break the continuous sheet layer structure of the flexible graphite slab, so that the flexible graphite slab is more likely to be filled in the mold cavity during the later mold pressing process, and ensure the surface quality of the bipolar plate after the graphite bipolar plate is formed;

[0055] Specifically, after the preprocessing device is assembled, the prefabricated board workpiece 3 is placed on the mounting table 10 of the bottom plate 8. The mounting table 10 and the baffle 4 fix and limit the prefabricated board workpiece 3. Lining thin sheets in the connecting grooves 13 on both sides of the bottom plate 8 can achieve vertical fine-tuning of the cutting structure 9. By fine-tuning the height of the cutting structure 9, the depth of the surface treatment of the workpiece can be adjusted. And by controlling the sliding of the slider 1 in the chute 12 of the cushion block 2, it can be realized that the cutting structure 9 makes a relatively sliding with limited position on the surface of the prefabricated board workpiece 3, which is convenient for breaking the continuous layer structure of the flexible graphite slab, making it easier to fill the mold cavity during the later mold pressing process of the flexible graphite slab.

[0056] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation on the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope 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.

Images