A porous hydrogen fuel cell bipolar plate and processing device

Abstract

The present invention relates to the technical field of battery bipolar plate production and processing, and specifically relates to a porous hydrogen fuel cell bipolar plate and processing device, comprising bipolar plate 1, bipolar plate 2, and bipolar plate 3, wherein a fastening mechanism is provided between bipolar plate 2 and bipolar plate 1 and bipolar plate 3. An upper convex roller and a lower concave roller cooperate to achieve large-scale embossing and grooving of bipolar plate raw material sheets, simplifying the processing flow. By using modular split roller blocks and positioning partitions to cooperate with each other, the embossed areas of three groups of different bipolar plates are separated, and the stability of the installation of the split roller blocks and the central base roller is met. By having a built-in heat-saturating component in the split roller block, the support structure inside the split roller block is optimized, and precise control of the surface temperature of the embossed component is achieved, thereby ensuring the quality and accuracy of the battery bipolar plate embossing. At the same time, through the design of a linkage locking component, double locking between the embossed component and the main structure is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery bipolar plate production and processing, and in particular to a porous hydrogen fuel cell bipolar plate and a processing device. Background Art

[0002] The porous hydrogen fuel cell bipolar plate is designed to meet the needs of fluid flow and heat transfer inside the fuel cell. The porous structure can provide a larger fluid contact area, promote the uniform distribution of the reaction gas, and improve the performance of the fuel cell. At the same time, the porous structure also helps to effectively transfer heat and maintain the temperature balance of the fuel cell. During the manufacturing of porous hydrogen fuel cell bipolar plates, metal plate embossing machines are usually used for processing, and embossed steel rollers play an important role in the embossing process of fuel cell bipolar plates.

[0003] Prior art, such as a fuel cell bipolar plate manufacturing device and method disclosed in publication number CN110690470B, combines the plate making process and the flow channel processing process into a single process step. A conveyor belt drives the slurry used to make the bipolar plates into different process areas, where the corresponding process steps are performed. This achieves integrated bipolar plate production and improves production efficiency.

[0004] The connection between the plates of traditional porous hydrogen fuel cell bipolar plates is not tight enough, resulting in a decrease in sealing performance, which in turn affects the performance and safety of the fuel cell. After long-term operation, the performance may be degraded due to heat accumulation, or even damage may occur. In order to realize the forming of fuel cell bipolar plates, a calendering roller is used to realize the bipolar plate slurry forming method. However, in actual use, the traditional slurry forming method cannot meet the needs of high efficiency and large-scale production, and the fluidity of the slurry during the rolling process varies greatly, which may cause uneven depth of the flow channel lines on the bipolar plate, thereby affecting the performance of the bipolar plate, especially the flow efficiency and uniformity of the fluid in the flow channel, making it difficult to control the formability of the bipolar plate flow channel and porous structure.

[0005] Therefore, the present invention proposes a porous hydrogen fuel cell bipolar plate and processing device to solve the problems that the connection between the traditional bipolar plate surfaces is not tight enough, affecting the performance and safety of the fuel cell, and the existing bipolar plate forming method cannot meet high efficiency and large-scale production, and the fluidity of the slurry during the rolling process varies greatly, which may cause the depth of the flow channel lines on the bipolar plate to be uneven, thereby affecting the performance of the bipolar plate. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a porous hydrogen fuel cell bipolar plate and a processing device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a porous hydrogen fuel cell bipolar plate, comprising bipolar plate one, bipolar plate two and bipolar plate three, a fastening mechanism being arranged between bipolar plate two and bipolar plate one and bipolar plate three, the fastening mechanism comprising a connecting bolt, the connecting bolt being composed of a bolt head and a bolt rod, the bolt rod portion of the connecting bolt being threadedly connected to the inner walls of bipolar plate one, bipolar plate two and bipolar plate three, the interior of the bolt rod being a hollow cylindrical structure, the inner surface of the bolt rod being provided with a drying sheet, the outer wall of the bolt rod being evenly provided with flow holes two, the inner wall of the bolt head being provided with flow hole one.

[0008] Preferably, convex rib strips are fixedly installed on the two side surfaces of the bipolar plate 2, and grooves adapted to the convex rib strips are respectively opened on the surfaces of the bipolar plate 1 and the bipolar plate 3, and a narrow edge guard is fixedly installed on the outer ring side of the bipolar plate 2, and the height of both sides of the narrow edge guard is lower than the thickness of the bipolar plate 2, and protruding edge guards are fixedly installed on the outer ring side surfaces of the bipolar plate 1 and the bipolar plate 3, and the height of the protruding edge guard is higher than the thickness of the bipolar plate 3, and the two sides of the narrow edge guard are respectively fitted with the surface of the protruding edge guard, and the convex rib strip is movably engaged with the groove, and a closed heat dissipation channel is formed between the outer side surface of the convex rib strip and the inner side surface of the protruding edge guard.

[0009] A processing device for a porous hydrogen fuel cell bipolar plate, used to process the above-mentioned porous hydrogen fuel cell bipolar plate, includes a metal plate embossing machine, an embossing mechanism is provided on the inner side of the metal plate embossing machine, and the embossing mechanism includes an upper convex roller and a lower concave roller. The upper convex roller and the lower concave roller have the same structure. The upper convex roller includes a central base roller, a positioning partition, an installation end plate and a split roller block; the width of the positioning partition is equal to the maximum diameter of the split roller block.

[0010] Preferably, a center hole is provided on the center inner wall of the center base roller member, a mounting groove is provided on the center outer wall of the center base roller member, the positioning partition is plugged into the inner wall of the mounting groove, two groups of mounting end plates are provided and distributed at both ends of the positioning partition, the mounting end plates are fixedly connected to the inner wall of the upper convex roller member by bolts, three groups of positioning partitions are provided and are arranged in a circular array about the center inner wall of the upper convex roller member, a hollow plug plate is provided between two adjacent groups of positioning partitions, one end of the hollow plug plate is connected to the inner wall of the center hole, and an air guide hole is respectively provided on the inner walls on both sides of the hollow plug plate.

[0011] Preferably, the outer surface of the split roller block is movably engaged with the outer surface of the mounting groove, the central annular surface of the split roller block is provided with a docking slot, the inner surface of the docking slot is movably engaged with the outer surface of the hollow plug plate, and two air guide holes are respectively provided on the side walls of the docking slot, and the two air guide holes correspond one-to-one with the air guide holes.

[0012] Preferably, an annular cavity is opened on the inner wall of the split roller block, and a heat equalizing component is arranged on the inner side of the annular cavity. The heat equalizing component includes an array support plate, an arc support member and a heat-conducting arc plate. The array support plate and the heat-conducting arc plate are respectively installed on the curved wall surface of the annular cavity, and the arc support member is arranged between the array support plate and the heat-conducting arc plate.

[0013] Preferably, the arc-shaped support member has an arc-shaped cavity structure, and the two ends of the arc-shaped support member are respectively fixedly connected to the inner wall of the annular cavity. One end of the arc-shaped support member is provided with air guide hole 2 and air guide hole 3 corresponding to air guide hole 1, and the outer annular surface of the arc-shaped support member is provided with a diffusion hole.

[0014] Preferably, locking holes are respectively provided on the inner walls on both sides of the split roller block, and limiting edge blocks are fixedly installed at both ends of the split roller block, and a limiting embedding groove is provided on the inner surface of the mounting end plate, and the inner surface of the limiting embedding groove is movably engaged with the outer surface of the limiting edge block, and a through groove is provided on the inner wall of the mounting end plate, and a through piece is provided on the inner wall of the through groove, and the through piece includes a locking bolt rod, and the cross-section of the locking bolt rod is a "T"-shaped structure, and a reset spring is provided between the outer surface of the locking bolt rod and the mounting end plate, one end of the reset spring is fixedly connected to the outer surface of the mounting end plate, and the other end of the reset spring is fixedly connected to the inner surface of the locking bolt rod.

[0015] Preferably, a linkage locking assembly is provided between the outer side surface of the mounting end plate and the limiting edge block, and the linkage locking assembly includes a cross plate, and the cross plate is fixedly mounted on the outer surface of the mounting end plate, and the cross plate is a "cross"-shaped plate structure, and a limiting groove is longitudinally provided on the central inner wall of the cross plate, and a guide column is fixedly mounted on the inner surface of the limiting groove, and the upper end of the guide column is provided with a threaded groove, and the outer surface of the threaded groove is screwed with a fastening nut, and the upper outer surface of the guide column passes through the upper inner wall of the limiting edge block.

[0016] Preferably, a slider is slidably installed on the inner surface of the limiting slide groove, and swing arms are movably connected on both sides of the slider. The other end of the swing arm is movably connected to a pushing wedge block, and a sliding rod is fixedly installed on the upper end of the pushing wedge block. The outer surface of the upper end of the sliding rod is slidably connected to the inner surface of the cross plate, and the outer surface of the locking bolt rod and the inner surface of the pushing wedge block are adaptive wedge structures.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The porous hydrogen fuel cell bipolar plate proposed in the present invention utilizes convex ribs that match grooves to achieve a tight fit between bipolar plate one, bipolar plate three, and bipolar plate two. The convex side guards provided on the sides of bipolar plate one and bipolar plate three, combined with narrow side guards, enhance the sealing performance of the assembly. Furthermore, the optimized design of the fastening mechanism not only ensures a stable connection between the three groups of bipolar plates, but also provides auxiliary heat dissipation for the heat dissipation channel, facilitating heat dissipation and further extending the service life of the porous hydrogen fuel cell bipolar plate.

[0019] 2. The present invention proposes a processing device for porous hydrogen fuel cell bipolar plates, which adopts the cooperation of upper convex rollers and lower concave rollers to realize large-scale embossing and grooving operations of bipolar plate raw materials, simplifying the processing flow. By adopting modular split roller blocks and positioning partitions to cooperate with each other, the embossing areas of three groups of different bipolar plates are separated, and the stability of the installation of the split roller blocks and the central base rollers is met. The built-in heat equalization component of the split roller block optimizes the internal support structure of the split roller block, realizes the precise control of the surface temperature of the embossed component, and ensures the quality and accuracy of the battery bipolar plate embossing. At the same time, through the design of the linkage locking component, double locking between the embossing component and the main structure is realized, which further enhances the stability and reliability of the processing, and further improves the efficiency and quality of the battery bipolar plate processing and forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the disassembled structure of the porous hydrogen fuel cell bipolar plate of the present invention;

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0022] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure at point B;

[0023] Figure 4 Schematic diagram of the assembly structure of the porous hydrogen fuel cell bipolar plate of the present invention;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at C;

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the metal plate embossing machine of the present invention;

[0026] Figure 7 Schematic diagram of the three-dimensional structure of the embossing mechanism of the present invention;

[0027] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at D of FIG.

[0028] Figure 9 Schematic diagram of a partial cross-section structure of the central base roller of the present invention;

[0029] Figure 10 For the present invention Figure 9 A schematic diagram of the structure at E is enlarged;

[0030] Figure 11 For the present invention Figure 9 The enlarged structural diagram of F;

[0031] Figure 12 This is a structural diagram of the central basic roller component of the present invention removed from the split roller block;

[0032] Figure 13 This is a schematic diagram of a half-section structure of the split roller block and the central base roller member of the present invention;

[0033] Figure 14 It is a schematic diagram of the detachable structure of the single-component roller block and the central basic roller member of the present invention;

[0034] Figure 15 Schematic diagram of the three-dimensional structure of the central base roller of the present invention;

[0035] Figure 16 This is a schematic diagram of the cross-sectional structure of the assembly of the split roller block and the central base roller component of the present invention;

[0036] Figure 17 For the present invention Figure 16 Schematic diagram of the enlarged structure at G;

[0037] Figure 18 It is a schematic diagram of the partial cross-sectional structure of the split roller block of the present invention.

[0038] Figure: 1, bipolar plate 1; 2, bipolar plate 2; 3, bipolar plate 3; 4, fastening mechanism; 40, heat dissipation channel; 21, ribbed rubber strip; 31, groove; 22, narrow edge guard; 32, protruding edge guard; 41, connecting bolt; 410, circulation hole 1; 4100, circulation hole 2; 411, drying sheet; 5, metal plate embossing machine; 6, embossing mechanism; 61, upper convex roller; 62, lower concave roller; 610, center base roller; 6100, mounting groove; 611, hollow insert; 6110, air guide hole 1; 63, positioning partition; 64, mounting end plate; 640, limiting embedded groove; 640 0. Through slot; 641. Cross plate; 6411. Limiting slide; 6412. Guide column; 64121. Fastening nut; 6413. Slider; 6414. Swing arm; 6415. Push wedge; 6416. Slide; 642. Locking bolt; 6421. Return spring; 65. Split roller block; 650. Locking hole; 651. Limiting edge block; 652. Docking slot; 6520. Air guide hole 2; 653. Annular cavity; 6531. Array support plate; 6532. Arc support; 65320. Air guide hole 3; 653201. Diffusion hole; 6533. Heat conduction arc plate. DETAILED DESCRIPTION

[0039] In order to clearly and completely describe the objectives and technical solutions of the present invention and make its advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] For example 1, please refer to Figure 1-18The present invention provides a technical solution: a porous hydrogen fuel cell bipolar plate, comprising a bipolar plate 1, a bipolar plate 2, and a bipolar plate 3, wherein a fastening mechanism 4 is provided between the bipolar plate 2, the bipolar plate 1, and the bipolar plate 3, the fastening mechanism 4 comprising a connecting bolt 41, the connecting bolt 41 being composed of a bolt head and a bolt rod, the bolt rod portion of the connecting bolt 41 being threadedly connected to the inner wall of the bipolar plate 1, the bipolar plate 2, and the bipolar plate 3, the interior of the bolt rod being a hollow cylindrical structure, the inner surface of the bolt rod being provided with a drying sheet 411, the outer wall of the bolt rod being evenly provided with flow holes 2 4100, the inner wall of the bolt head being provided with flow holes 1 410; both sides of the bipolar plate 2 A ribbed rubber strip 21 is fixedly mounted on the surface, and a groove 31 adapted to the ribbed rubber strip 21 is respectively opened on the surface of the bipolar plate 1 and the bipolar plate 3. A narrow edge guard 22 is fixedly mounted on the outer ring side of the bipolar plate 2. The height of both sides of the narrow edge guard 22 is lower than the thickness of the bipolar plate 2. A protruding edge guard 32 is fixedly mounted on the outer ring side of the bipolar plate 1 and the bipolar plate 3. The height of the protruding edge guard 32 is higher than the thickness of the bipolar plate 3. The two sides of the narrow edge guard 22 are respectively fitted with the surface of the protruding edge guard 32. The ribbed rubber strip 21 is movably engaged with the groove 31. A closed heat dissipation channel 40 is formed between the outer side surface of the ribbed rubber strip 21 and the inner side surface of the protruding edge guard 32.

[0041] In this embodiment, the convex rib strip 21 is adapted to the groove 31 to achieve a close fit between the bipolar plate 1, the bipolar plate 3 and the bipolar plate 2, and the convex edge guard 32 set on the side of the bipolar plate 1 and the bipolar plate 3 is combined with the narrow edge guard 22 to enhance the sealing after the combination. In addition, through the optimized design of the fastening mechanism 4, the three groups of bipolar plates are firmly connected while also meeting the auxiliary heat dissipation of the heat dissipation channel 40, which helps to dissipate heat and further enhance the service life of the porous hydrogen fuel cell bipolar plate. Specifically, the bipolar plate 1, the bipolar plate 2 and the bipolar plate 3 are assembled, and the grooves 31 in the bipolar plate 1 and the bipolar plate 3 are adapted to the convex rib strips 21 distributed on both sides of the bipolar plate 2 to achieve an adaptive fit between the three groups of bipolar plates to form a seal, effectively The seal can ensure that the reaction gases hydrogen and oxygen flow stably inside the battery, prevent gas leakage to the outside of the battery, and improve the safety performance of the battery. The stable connection of the three groups of bipolar plates can form a more solid battery structure, thereby improving the overall mechanical strength and durability of the battery. It should be noted that the bipolar plate 1 and the bipolar plate 3 are fastened together by a fastening mechanism 4, and the connecting bolt 41 can dissipate the heat generated in the heat dissipation channel 40 through the circulation design of the circulation hole 2 4100 and the circulation hole 1 410, thereby avoiding heat accumulation on the battery bipolar plates and causing damage. It is worth noting that the staggered drying sheets 411 are designed inside the connecting bolt 41 to prevent external moisture from entering the inner cavity of the heat dissipation channel 40 without affecting the normal circulation of hot and cold gases.

[0042] Example 2, refer to the attached Figure 1-18 On the basis of Example 1, the present invention also proposes a processing device for a porous hydrogen fuel cell bipolar plate, which is used to process the above-mentioned porous hydrogen fuel cell bipolar plate, including a metal plate embossing machine 5. An embossing mechanism 6 is provided on the inner side of the metal plate embossing machine 5. The embossing mechanism 6 includes an upper convex roller member 61 and a lower concave roller member 62. The upper convex roller member 61 and the lower concave roller member 62 have the same structure. The upper convex roller member 61 includes a central base roller member 610, a positioning partition plate 63, an installation end plate 64 and a split roller block 65.

[0043] Example 3, refer to the attached Figure 1-18 On the basis of the second embodiment, in order to realize the limited assembly between the modular split roller block 65 and the central basic roller member 610: locking holes 650 are respectively opened on the inner walls of both sides of the split roller block 65, and limited edge blocks 651 are fixedly installed at both ends of the split roller block 65, and a limited embedding groove 640 is opened on the inner surface of the mounting end plate 64. The inner surface of the limited embedding groove 640 is movably engaged with the outer surface of the limited edge block 651, and a through groove 6400 is opened on the inner wall of the mounting end plate 64. A through piece is set on the inner wall of the through groove 6400, and the through piece includes a locking bolt rod 642. The cross-section of the locking bolt rod 642 is a "T"-shaped structure. A return spring 6421 is set between the outer surface of the locking bolt rod 642 and the mounting end plate 64, and one end of the return spring 6421 is engaged with the mounting end plate 6 4 is fixedly connected, and the other end of the return spring 6421 is fixedly connected to the inner surface of the locking bolt rod 642; a center hole is opened on the center inner wall of the center base roller 610, and a mounting groove 6100 is opened on the center outer wall of the center base roller 610. The positioning partition 63 is plugged and installed on the inner wall of the mounting groove 6100. Two groups of mounting end plates 64 are provided and distributed at both ends of the positioning partition 63. The mounting end plates 64 are fixedly connected to the inner wall of the upper convex roller member 61 by bolts. The positioning partition 63 is provided in three groups and is arranged in a circular array about the center inner wall of the upper convex roller member 61. A hollow insert 611 is provided between two adjacent groups of positioning partitions 63. One end of the hollow insert 611 is connected to the inner wall of the center hole. Air guide holes 6110 are respectively opened on the inner walls of both sides of the hollow insert 611;

[0044] In this embodiment, the split roller block 65 adopts a modular design, replacing the design of the traditional integrated embossing roller, and matching the three sets of corresponding embossed convex patterns and embossed concave patterns on the upper convex roller member 61 and the lower concave roller member 62 respectively. Here, an assembleable structure is formed between the split roller block 65 and the central base roller member 610. When the split roller block 65 needs to be installed, the split roller block 65 is inserted between the two sets of positioning partitions 63, and a hollow insert plate 611 fixedly connected to the central base roller member 610 is formed with the docking slot 652 on the inner side of the center of the split roller block 65. The split roller block 65 is designed to limit the insertion, and the limiting edge blocks 651 on both sides of the split roller block 65 are adapted to the limiting groove 640 on the inner side of the mounting end plate 64, so that the split roller block 65 forms an interlaced limiting structure during the assembly process with the central base roller 610. This interlaced limiting structure can withstand the pressure and torque of the split roller block 65 during the embossing process, ensuring the stability and durability of the roller body. It should be noted that the positioning partition 63 here can be used to separate different embossing areas, and can also be used to limit the axial movement of the split roller block 65.

[0045] After the assembly between the split roller block 65 and the central base roller member 610 is completed, the locking bolt rod 642 on the side of the mounting end plate 64 can be used as a fastener passing through the mounting end plate 64 and the split roller block 65, further enhancing the stability of the embossing process of the split roller block 65.

[0046] Example 4, refer to the attached Figure 1-18 On the basis of the third embodiment, in order to achieve the stability and strength of the split roller block 65 during the embossing process: a center hole is opened on the center inner wall of the central base roller 610, and a mounting groove 6100 is opened on the center outer wall of the central base roller 610. The positioning partition 63 is plugged and installed on the inner wall of the mounting groove 6100. Two groups of mounting end plates 64 are provided and distributed at both ends of the positioning partition 63. The mounting end plates 64 are fixedly connected to the inner wall of the upper convex roller member 61 by bolts. The positioning partitions 63 are provided in three groups and are arranged in a circular array about the center inner wall of the upper convex roller member 61. The two adjacent groups of positioning partitions are installed in the inner wall of the mounting groove 6100. A hollow insert 611 is provided between the partitions 63. One end of the hollow insert 611 is connected to the inner wall of the center hole. Air guide holes 6110 are respectively provided on the inner walls of both sides of the hollow insert 611. The outer surface of the split roller block 65 is movably engaged with the outer surface of the mounting groove 6100. A docking slot 652 is provided on the central annular surface of the split roller block 65. The inner surface of the docking slot 652 is movably engaged with the outer surface of the hollow insert 611. Air guide holes 6520 are respectively provided on the side walls of the docking slot 652. The air guide holes 6520 correspond one-to-one with the air guide holes 6110.

[0047] In this embodiment, the mounting end plates 64 are distributed at both ends of the positioning partition 63 and are fixed to the central base roller 610 by bolts. The mounting end plates 64 here can not only match the limiting edge blocks 651 to limit the side of the split roller block 65, but also ensure that the split roller block 65 does not move laterally during the embossing process. It should be noted that the central base roller 610 is a hollow cylindrical structure. One end of the central base roller 610 is connected to a fan. By starting the fan, the gas can be circulated through the side air guide hole 1 6110 of the hollow insert plate 611. The air guide hole 2 6520 corresponds to the air guide hole 1 6110 one by one, so that the gas can enter the inner cavity of the annular cavity 653 evenly, realize the temperature control of the surface of the split roller block 65, and realize the embossing of the porous and flow channels during the bipolar plate embossing process.

[0048] Example 5, refer to the attached Figure 1-18 On the basis of the fourth embodiment, in order to achieve the control of the surface temperature of the split roller block 65 and ensure the quality and accuracy of the embossing of the battery bipolar plates: an annular cavity 653 is formed on the inner wall of the split roller block 65. A heat spreader assembly is provided inside the annular cavity 653. The heat spreader assembly includes an array support plate 6531, an arc-shaped support member 6532, and a heat conduction arc plate 6533. The array support plate 6531 and the heat conduction arc plate 6533 are respectively installed on the curved wall surface of the annular cavity 653. The arc-shaped support member 6532 is disposed between the array support plate 6531 and the heat-conducting arc plate 6533. The arc-shaped support member 6532 has an arc-shaped cavity structure, with both ends of the arc-shaped support member 6532 fixedly connected to the inner wall of the annular cavity 653. One end of the arc-shaped support member 6532 is provided with a second air guide hole 6520 and a third air guide hole 65320 corresponding to the first air guide hole 6110. The outer annular surface of the arc-shaped support member 6532 is provided with a diffusion hole 653201.

[0049] In this embodiment, the annular cavity 653 forms an arc structure as a whole, which can not only store the gas discharged from the second air guide hole 6520 and discharge it evenly through the diffusion hole 653201, but also provide structural support to the split roller block 65, ensure the stability and rigidity of the split roller block 65, and reduce deformation and vibration. The array support plate 6531 here can serve as a limiting support for the arc support member 6532. When the regulated gas is evenly discharged to the inner cavity of the annular cavity 653 through the diffusion hole 653201, the heat conduction function of the heat conduction arc plate 6533 is used to achieve uniform temperature regulation of the split roller block 65.

[0050] Example 6, refer to the attached Figure 1-18On the basis of the fifth embodiment, in order to realize the axial synchronous locking when the split roller block 65 and the central base roller member 610 are radially assembled: a linkage locking assembly is provided between the outer side surface of the mounting end plate 64 and the limiting edge block 651, and the linkage locking assembly includes a cross plate 641, which is fixedly mounted on the outer surface of the mounting end plate 64, and the cross plate 641 is a "cross" plate structure. A limiting slide groove 6411 is longitudinally provided on the central inner wall of the cross plate 641, and a guide column 6412 is fixedly mounted on the inner surface of the limiting slide groove 6411. The upper end of the guide column 6412 is provided with a threaded groove, and the outer surface of the threaded groove is screwed with a fastening nut 64121. The outer surface of the upper end of the guide column 6412 passes through the limiting edge block 6 The inner wall of the upper end of 51; a slider 6413 is slidably installed on the inner surface of the limiting slide groove 6411, and the two sides of the slider 6413 are movably connected with a swing arm 6414, and the other end of the swing arm 6414 is movably connected with a push wedge 6415, and the upper end of the push wedge 6415 is fixedly installed with a slide rod 6416, and the outer surface of the upper end of the slide rod 6416 is slidably connected to the inner surface of the cross plate 641, and the outer surface of the locking bolt rod 642 and the inner surface of the pushing wedge 6415 are adapted wedge-shaped structures; an abutment spring is sleeved on the outer side of the lower end of the guide column 6412, and the lower end of the abutment spring is fixedly connected to the bottom surface of the inner cavity of the limiting slide groove 6411, and the upper end of the abutment spring is fixedly connected to the bottom of the slider 6413;

[0051] In this embodiment, the linkage locking assembly is integrally connected to the outer side of the mounting end plate 64. When the split roller block 65 is assembled with the central base roller member 610, the lower side of the limiting edge block 651 gradually adapts to the limiting embedding groove 640. When the bottom of the limiting edge block 651 is completely in contact with the bottom of the limiting embedding groove 640, the upper end of the limiting edge block 651 passes through the top of the guide column 6412, as shown in FIG. Figure 10As shown, the outer position of the upper end of the limiting edge block 651 pushes the slider 6413 downward. At this time, the slider 6413 slides on the inner side of the limiting slide groove 6411, and the abutting spring connected to the bottom of the slider 6413 is deformed and compressed. During the process of the slider 6413, the angles of the swing arms 6414 connected on both sides change, driving the pushing wedges 6415 on both sides to expand horizontally outward synchronously. At this time, the pushing wedges 6415 and the surface of the locking bolt rod 642 are wedge-shaped, and the pushing wedges 6415 push the locking bolt rod 642 inward, thus achieving The locking bolt rod 642 passes through the through groove 6400 and is inserted into the inner side of the locking hole 650 to achieve double locking between the split roller block 65 and the mounting end plate 64. It should be noted that the guide column 6412 here can serve as a limiting part for the limiting edge block 651 and the slider 6413, and can also be further tightened and installed through the matching installation of the threaded groove designed at the upper end and the fastening nut 64121. Through such a design, the locking process is simplified, and multiple locking is achieved to ensure the stability of the embossing processing of the porous hydrogen fuel cell bipolar plate.

[0052] Example 7, refer to the attached Figure 1-18 Based on the sixth embodiment, the present invention further proposes a method for using a porous hydrogen fuel cell bipolar plate processing device, comprising the following steps:

[0053] Step 1: Modular assembly and position limiting assembly: First, the modularly designed split roller block 65 is inserted between two adjacent sets of positioning partitions 63. The position limiting edge blocks 651 fixed at both ends of the split roller block 65 are movably engaged with the position limiting grooves 640 provided on the inner side of the mounting end plate 64 to achieve preliminary position limiting. Then, the hollow insert plate 611 fixed to the central base roller member 610 is used to form a plug-in limit with the docking slot 652 on the inner side of the center of the split roller block 65 to ensure the stability and durability of the split roller block 65 during the embossing process.

[0054] Step 2: Gas circulation and temperature control: After the split roller block 65 and the central base roller member 610 are assembled, the fan connected to one end of the central base roller member 610 is started. The gas generated by the fan flows through the open air guide hole 1 6110 on the side of the hollow insert plate 611 and enters the docking slot 652 provided on the central annular surface of the split roller block 65 and the open air guide hole 2 6520 on the side wall. In this way, the gas can evenly enter the inner cavity of the split roller block 65, realize the temperature control of the surface of the split roller block 65, and ensure the embossing quality of the porous and flow channels during the bipolar plate embossing process.

[0055] Step 3: A heat spreader assembly achieves temperature uniformity: A heat spreader assembly is set in the annular cavity 653 opened on the inner wall of the split roller block 65. The heat spreader assembly includes an array support plate 6531 and a heat-conducting arc plate 6533 installed on the curved wall surface, and an arc-shaped cavity structure arc support member 6532 arranged therebetween. When the regulated gas passes through the open diffusion holes 653201 opened on the outer annular surface of the arc support member 6532 and is evenly discharged into the inner cavity of the annular cavity 653, the heat conduction function of the heat-conducting arc plate 6533 is used to achieve uniform temperature regulation of the split roller block 65, ensuring the stability and accuracy of the embossing process.

[0056] Step 4: Axial synchronous locking to ensure stability: After the split roller block 65 and the central base roller 610 are radially assembled, a linkage locking assembly is used to achieve axial synchronous locking. The linkage locking assembly includes a "cross" plate-like structure cross plate 641 fixedly installed on the outer surface of the mounting end plate 64. When the upper outer position of the limiting edge block 651 contacts the cross plate 641, it will push the slider 6413 sliding in the limiting slide groove 6411, thereby driving the two sides to push the wedge blocks 6415 to expand horizontally outward synchronously. At this time, the wedge blocks 6415 are adapted to the locking bolt rod 642 of the wedge structure, and the locking bolt rod 642 is pushed inward to achieve double locking between the split roller block 65 and the mounting end plate 64. In addition, the guide column 6412 serves as a limiter, and further fastening and installation are achieved through the threaded groove at its upper end and the matching fastening nut 64121.

[0057] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A porous hydrogen fuel cell bipolar plate, comprising a bipolar plate 1 (1), a bipolar plate 2 (2) and a bipolar plate 3 (3), characterized in that: A fastening mechanism (4) is provided between the bipolar plate 2 (2) and the bipolar plate 1 (1) and the bipolar plate 3 (3), and the fastening mechanism (4) includes a connecting bolt (41), the connecting bolt (41) is composed of a bolt head and a bolt rod, the bolt rod portion of the connecting bolt (41) is threadedly connected to the inner wall of the bipolar plate 1 (1), the bipolar plate 2 (2) and the bipolar plate 3 (3), the interior of the bolt rod is a hollow cylindrical structure, the inner surface of the bolt rod is provided with a drying sheet (411), the outer wall of the bolt rod is uniformly provided with a second flow hole (4100), and the inner wall of the bolt head is provided with a flow hole (410); convex rib strips (21) are fixedly installed on both sides of the bipolar plate 2 (2), the bipolar plate 1 (1) and the inner wall of the bipolar plate 3 (3) are respectively fixedly provided with a convex rib strip (21), and the bipolar plate 1 (1) and the inner wall of the bipolar plate 3 (3) are respectively fixedly provided with a convex rib strip (21). The surfaces of bipolar plate three (3) are respectively provided with grooves (31) adapted to the rib rubber strip (21); a narrow edge guard (22) is fixedly installed on the outer ring side surface of bipolar plate two (2); the height of both sides of the narrow edge guard (22) is lower than the thickness of bipolar plate two (2); the outer ring sides of bipolar plate one (1) and bipolar plate three (3) are respectively fixed with protruding edge guards (32); the height of the protruding edge guard (32) is higher than the thickness of bipolar plate three (3); the two sides of the narrow edge guard (22) are respectively fitted with the surface of the protruding edge guard (32); the rib rubber strip (21) is movably engaged with the groove (31); and a closed heat dissipation channel (40) is formed between the outer side surface of the rib rubber strip (21) and the inner side surface of the protruding edge guard (32).

2. A processing device for a porous hydrogen fuel cell bipolar plate, used for processing a porous hydrogen fuel cell bipolar plate according to claim 1, comprising a metal plate embossing machine (5), characterized in that: An embossing mechanism (6) is provided on the inner side of the metal plate embossing machine (5), and the embossing mechanism (6) comprises an upper convex roller member (61) and a lower concave roller member (62). The upper convex roller member (61) and the lower concave roller member (62) have the same structure. The upper convex roller member (61) comprises a central base roller member (610), a positioning partition plate (63), an installation end plate (64), and a split roller block (65).

3. The processing device for a porous hydrogen fuel cell bipolar plate according to claim 2, characterized in that: A central hole is provided on the central inner wall of the central base roller (610), and a mounting groove (6100) is provided on the central outer wall of the central base roller (610). The positioning partition (63) is plugged and installed on the inner wall of the mounting groove (6100). Two groups of mounting end plates (64) are provided and distributed at both ends of the positioning partition (63). The mounting end plates (64) are fixedly connected to the inner wall of the upper convex roller (61) by bolts. Three groups of positioning partitions (63) are provided and are arranged in a circular array about the central inner wall of the upper convex roller (61). A hollow plug plate (611) is provided between two adjacent groups of positioning partitions (63). One end of the hollow plug plate (611) is connected to the inner wall of the central hole, and an air guide hole (6110) is provided on the inner walls of both sides of the hollow plug plate (611).

4. The processing device for a porous hydrogen fuel cell bipolar plate according to claim 3, characterized in that: The outer surface of the split roller block (65) is movably engaged with the outer surface of the mounting groove (6100), and a docking slot (652) is provided on the central annular surface of the split roller block (65). The inner surface of the docking slot (652) is movably engaged with the outer surface of the hollow insert plate (611), and a second air guide hole (6520) is provided on the side wall of the docking slot (652), and the second air guide hole (6520) corresponds one-to-one with the first air guide hole (6110).

5. The processing device for a porous hydrogen fuel cell bipolar plate according to claim 4, characterized in that: An annular cavity (653) is provided on the inner wall of the split roller block (65), and a heat-scaling component is provided on the inner side of the annular cavity (653). The heat-scaling component includes an array support plate (6531), an arc-shaped support member (6532) and a heat-conducting arc plate (6533). The array support plate (6531) and the heat-conducting arc plate (6533) are respectively installed on the curved wall surface of the annular cavity (653), and the arc-shaped support member (6532) is provided between the array support plate (6531) and the heat-conducting arc plate (6533).

6. The processing device for a porous hydrogen fuel cell bipolar plate according to claim 5, characterized in that: The arc-shaped support member (6532) has an arc-shaped cavity structure, and the two ends of the arc-shaped support member (6532) are respectively fixedly connected to the inner wall of the annular cavity (653). One end of the arc-shaped support member (6532) is provided with an air guide hole 2 (6520) and an air guide hole 3 (65320) corresponding to the air guide hole 1 (6110), and the outer annular surface of the arc-shaped support member (6532) is provided with a diffusion hole (653201).

7. The processing device for a porous hydrogen fuel cell bipolar plate according to claim 2, characterized in that: The inner walls of both sides of the split roller block (65) are respectively provided with locking holes (650), and the two ends of the split roller block (65) are fixedly installed with limiting edge blocks (651). The inner surface of the mounting end plate (64) is provided with a limiting embedding groove (640), and the inner surface of the limiting embedding groove (640) is movably engaged with the outer surface of the limiting edge block (651). The inner wall of the mounting end plate (64) is provided with a through groove (6400), and the inner surface of the through groove (6400) is The wall is provided with a through-piece, the through-piece including a locking bolt rod (642), the cross-section of the locking bolt rod (642) is a "T"-shaped structure, a return spring (6421) is provided between the outer surface of the locking bolt rod (642) and the mounting end plate (64), one end of the return spring (6421) is fixedly connected to the outer surface of the mounting end plate (64), and the other end of the return spring (6421) is fixedly connected to the inner surface of the locking bolt rod (642).

8. The apparatus for processing a porous hydrogen fuel cell bipolar plate according to claim 7, characterized in that: A linkage locking assembly is provided between the outer side surface of the mounting end plate (64) and the limiting edge block (651), and the linkage locking assembly includes a cross plate (641). The cross plate (641) is fixedly mounted on the outer surface of the mounting end plate (64). The cross plate (641) is a "cross"-shaped plate structure. A limiting sliding groove (6411) is longitudinally provided on the central inner wall of the cross plate (641). A guide column (6412) is fixedly mounted on the inner surface of the limiting sliding groove (6411). The upper end of the guide column (6412) is provided with a threaded groove. The outer surface of the threaded groove is screwed with a fastening nut (64121). The outer surface of the upper end of the guide column (6412) passes through the inner wall of the upper end of the limiting edge block (651).

9. The apparatus for processing a porous hydrogen fuel cell bipolar plate according to claim 8, characterized in that: A slider (6413) is slidably mounted on the inner surface of the limiting slide groove (6411), and swing arms (6414) are movably connected to both sides of the slider (6413), and a push wedge (6415) is movably connected to the other end of the swing arm (6414), and a slide rod (6416) is fixedly mounted on the upper end of the push wedge (6415), and the outer surface of the upper end of the slide rod (6416) is slidably connected to the inner surface of the cross plate (641), and the outer surface of the locking bolt rod (642) and the inner surface of the pushing wedge (6415) are adapted wedge structures.

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