Hydrogen fuel cell bipolar plate convenient to install

Abstract

The invention discloses a hydrogen fuel cell bipolar plate convenient to install, which comprises bipolar plates and conical sleeves, the conical sleeves penetrate through the four corners of the bipolar plates, connecting tables capable of moving up and down are clamped at the bottoms of the conical sleeves, the upper and lower adjacent connecting tables are connected end to end to connect a plurality of bipolar plates, and connecting cylinders are fixed in the middles of the connecting tables. A butt joint with the diameter smaller than the inner diameter of the connecting cylinder is arranged at the top of the connecting cylinder, a rotating head is rotationally arranged at the top of the butt joint, a guide groove is formed in the connecting cylinder, sliding blocks matched with the guide groove are fixed to the two sides of the rotating head, a correcting opening perpendicular to the guide groove is formed in the top of the guide groove, and a plurality of correcting heads are fixed to the inner wall of the top of the connecting cylinder. According to the invention, butt joint and rotary interlocking of connecting tables among a plurality of bipolar plates can be completed through a pressing action, and the downward pressure of butt joint is converted into the rotary force of the rotary head, so that the slide block slides into the correction port to realize locking, no extra tool is needed, rapid installation is realized, and the assembly time of a galvanic pile is shortened.

Description

Technical Field

[0001] This invention relates to the field of bipolar plate installation, and more specifically to a hydrogen fuel cell bipolar plate that is easy to install. Background Technology

[0002] A fuel cell is a power generation device that directly converts chemical energy into electrical energy. Its core component is the fuel cell stack. The stack consists of hundreds of individual cells stacked in series, and each individual cell mainly consists of an anode plate, a cathode plate, and a membrane electrode assembly sandwiched between them. Therefore, the ability to achieve a fast, precise, and reliable connection between the bipolar plates directly determines the assembly efficiency, structural stability, and production cost of the entire fuel cell stack.

[0003] To address the positioning issue during bipolar plate stacking, several solutions have been proposed in the prior art. For example, Chinese patent announcement CN110571447B discloses an integrated metal bipolar plate assembly structure for fuel cells. This solution utilizes matching assembly positioning holes and positioning posts along the edges of the bipolar plates. During stacking, the cooperation between the positioning posts and the positioning holes ensures precise positioning between adjacent bipolar plates. This solution, to a certain extent, avoids damage to the membrane electrode assembly caused by misalignment and improves assembly accuracy.

[0004] However, although the above-mentioned existing technical solutions have solved the positioning problem, during the assembly process, operators still need to accurately align the positioning posts and positioning holes of multiple bipolar plates one by one before they can be stacked. The assembly steps are relatively cumbersome, which limits the improvement of assembly speed and results in a relatively long overall assembly time for the fuel cell stack. The assembly efficiency needs to be further improved.

[0005] Therefore, how to provide a fuel cell bipolar plate connection structure that can surpass the traditional positioning mode and achieve truly rapid installation, thereby shortening the assembly time of the fuel cell stack, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a conveniently installed hydrogen fuel cell bipolar plate to solve the above-mentioned problems. By pressing, the connection platform between multiple bipolar plates can be docked and rotated and interlocked. The downward pressure of docking is converted into the rotational force of the rotating head, so that the slider slides into the correction port to lock. No additional tools are required, which realizes rapid installation and shortens the assembly time of the fuel cell stack. See the following description for details.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a conveniently installed hydrogen fuel cell bipolar plate, comprising a bipolar plate and a conical sleeve. The conical sleeve is provided through each of the four corners of the bipolar plate. The bottom of the conical sleeve is engaged with a vertically movable connecting platform. The vertically adjacent connecting platforms are connected end to end to connect multiple bipolar plates. A connecting cylinder is fixed in the middle of the connecting platform. The top of the connecting cylinder is a connector with a diameter smaller than the inner diameter of the connecting cylinder. A rotating head is rotatably mounted on the top of the connector. A guide groove is opened inside the connecting cylinder. Slider blocks adapted to the guide groove are fixed on both sides of the rotating head. A correction opening perpendicular to the guide groove is opened at the top of the guide groove. Multiple correction heads are fixed on the inner wall of the top of the connecting cylinder. A correction block adapted to the gap between the correction heads is fixed on the top of the connector. When adjacent connecting platforms are connected, the slider moves upward along the adjacent guide groove. The correction block connects with the correction head and pushes the rotating head to rotate, so that the slider slides into the correction opening and locks the relative position of the two connecting platforms.

[0008] Using the aforementioned convenient-to-install hydrogen fuel cell bipolar plate, during bipolar plate stacking, the conical sleeve of the upper bipolar plate is aligned with the conical sleeve of the lower bipolar plate, and then pressed down directly. During this process, the bottom connecting platform of the upper conical sleeve first contacts the first connecting cover of the lower conical sleeve, then penetrates into the retaining plate, eventually fitting into the retaining plate's clearance groove. As the upper bipolar plate continues to press down, the second connecting cover and connecting platform gradually contract upwards, simultaneously compressing the first and second springs. Because the diameters of the conical sleeve, first connecting cover, second connecting cover, and connecting platform gradually decrease from top to bottom, the connecting platform automatically aligns itself when entering the conical sleeve of the lower bipolar plate, guided by its conical sidewall. As the upper connecting platform enters the lower conical sleeve, its bottom connecting cylinder is still not connected to the lower connecting joint. At this point, the two bipolar plates that are joined together are picked up and connected to another bipolar plate. During this process, the middle layer bipolar plates repeat the pressing process of the upper bipolar plate. Finally, the connecting platform of the intermediate bipolar plate moves up to align with the connecting platform of the upper bipolar plate, allowing the mating joint of the intermediate bipolar plate to penetrate into the upper connecting cylinder. This causes the slider to slide upwards along the guide groove of the upper connecting cylinder until the straightening block of the intermediate connecting platform contacts the straightening head at the top of the upper connecting cylinder. The guide slope of the straightening block pushes the rotating head to rotate, ultimately causing the slider to engage in the straightening port. During the alignment process between the straightening head and the straightening block, the movable spring is compressed and continuously provides upward force to the rotating head, ultimately assisting in pushing the straightening head to align with the straightening block, thereby locking the connecting platforms of the intermediate and upper bipolar plates. At this point, the alignment of the three bipolar plates is complete, and the two bipolar plates on the upper layer are locked together. Repeating the above actions can be used to align subsequent bipolar plates. During this process, when the first and second springs are not docked, they provide a continuous downward preload to the movable second connecting cover and connecting platform, preventing the components from shaking or colliding during transportation or handling. During docking, as the first and second springs are gradually compressed, their stored elasticity is converted into a continuous preload after the bipolar plates dock, so that each component inside the docked conical sleeve is subjected to the preload from the first and second springs, preventing the components from shaking after the bipolar plates are locked, thus affecting the locking effect. When multiple bipolar plates are connected, the locked bipolar plates need to be frequently lifted and moved. When the whole assembly is lifted upwards, the connecting force is mainly applied to the rotating heads and locking blocks of each connecting platform. The locking plate fixed to the outer wall of the connecting platform has its bottom attached to the bottom of the support plate of the lower connecting platform. As the whole assembly is lifted, the locking plate is simultaneously subjected to the gravity transmitted from the support plate of the upper bipolar plate. The end of the locking plate moves downwards, while the other end moves upwards through the extension plate and is limited by the locking seat and cannot rotate, so that the entire locking plate cannot move downwards and share the weight of the upper bipolar plate.

[0009] Preferably, the bottom of the rotating head is fixed with a locking block, and the top of the connecting cylinder is provided with a locking groove to accommodate the rotation of the locking block. Two movable springs are fixed in the middle section of the locking block, which respectively abut against the rotating head and the locking groove. When the rotating head is connected to the connecting cylinder, the movable springs are compressed to provide an upward elastic force to the rotating head, so that the straightening block is connected to the straightening head. The sides of the straightening block are all inclined guide slopes to guide the straightening head to move along the guide slopes. A connecting rod is slidably connected between the locking block and the locking groove, and the connecting rod connects the locking block and the locking groove.

[0010] Preferably, a first connecting cover is fixed to the bottom of the conical sleeve, and a second connecting cover is movably connected to the bottom of the first connecting cover. Both the first and second connecting covers are conical shells with diameters that gradually decrease from top to bottom. The top of the connecting platform is fixedly connected to the second connecting cover to connect the conical sleeve. The diameters of the connecting platform, the second connecting cover, and the first connecting cover gradually decrease from top to bottom. The conical sleeve can move up and down to allow the connecting platform and the second connecting cover to gradually retract and enter the conical sleeve and the first connecting cover. Furthermore, adjacent conical sleeves can be combined and fitted together in the retracted state to allow adjacent connecting platforms to align.

[0011] Preferably, the bottom of the inner wall of the conical sleeve is fixed with a retaining ring that adapts to the outer diameter of the first connecting cover, so that the inside of the conical sleeve adapts to the external shape of the first connecting cover and the conical sleeve.

[0012] Preferably, a support plate is fixed to the top of the first connecting cover, and an avoidance groove is provided in the middle of the support plate. The diameter of the avoidance groove is larger than the diameter of the connecting platform so that both adjacent connecting platforms can pass through the avoidance groove. The adjacent connecting platforms are connected to each other by overlapping the avoidance groove to connect the adjacent conical sleeves.

[0013] Preferably, a top plate is fixed to the top of the second connecting cover, and a plurality of first guide posts are fixed to the top of the top plate and slidably connected to the support plate in the middle to avoid misalignment between the second connecting cover and the first connecting cover. A connecting plate is fixed to the top of the connecting platform, and a plurality of second guide posts are fixed to the top of the connecting plate and slidably connected to the top plate in the middle to avoid misalignment between the connecting platform and the second connecting cover. The first guide posts and the second guide posts make the upper and lower adjacent connecting platforms vertically aligned.

[0014] Preferably, the first guide post is fitted with a first spring at both ends abutting against the support plate and the top plate, and the second guide post is fitted with a second spring at both ends abutting against the top plate and the connecting plate. When the bipolar plates are connected, the conical sleeve gradually retracts the second connecting cover, the first connecting cover and the connecting platform into the interior and compresses the first spring and the second spring. After the upper and lower adjacent connecting platforms are docked, the first spring and the second spring are in a compressed state, continuously providing pre-tightening force for the second connecting cover and the connecting platform.

[0015] Preferably, the top of the conical sleeve is detachably connected to a top cover, and the bottom of the top cover is fixed with a docking cylinder to connect adjacent connecting cylinders. The bottom of the docking cylinder is fixed with two symmetrically distributed annular buckles. The gap between the buckles is greater than the width of the slider to accommodate the slider entering the interior of the docking cylinder. The rotating head rotates to dock the slider with the buckles and fix the height of the rotating head and the connecting head. The top cover is located in the middle of the topmost conical sleeve.

[0016] Preferably, a card seat is fixed in the middle of the outer wall of the connecting platform, and multiple card plates are hinged to the outer periphery of the card seat. The outer diameter of the card plate is larger than the diameter of the clearance groove to fit the bottom of the support plate, and an extension plate is fixed to the bottom of the card plate. The extension plate fits the bottom of the card seat. After the adjacent bipolar plates are connected, the card plates can fit the bottom of the support plate when the bipolar plates are lifted and transported as a whole, thereby sharing the load on the card block. Multiple assist seats are fixed on the outer wall of the connecting platform, and an assist spring is fixed between the assist seat and the adjacent card plate. After the connecting platform enters the adjacent conical sleeve, the card plate is lifted by the clearance groove and the assist spring is compressed. After the card plate enters the bottom of the conical sleeve through the clearance groove, the assist spring resets the card plate.

[0017] Preferably, the bipolar plate has multiple mounting holes in the middle, and the mounting holes of adjacent bipolar plates are vertically aligned so that they can be connected after the bipolar plates are fixed.

[0018] The beneficial effects are as follows: 1. This invention can complete the docking and rotational interlocking of the connecting platform between multiple bipolar plates by pressing. By using the cooperation of the straightening block and the straightening head, the downward pressure of docking is converted into the rotational force of the rotating head, so that the slider slides into the straightening port to achieve locking. No additional tools are required, which realizes rapid installation and shortens the assembly time of the fuel cell stack. 2. When stacking bipolar plates, align the tapered sleeve of the upper bipolar plate with the tapered sleeve of the lower bipolar plate and press it down directly. Utilizing the structure of tapered sleeve, first connecting cover, second connecting cover and connecting platform with diameters gradually decreasing from top to bottom, the connecting platform is automatically aligned by the tapered sidewall of the lower tapered sleeve when it enters, without the need for manual alignment.

[0019] 3. In the unconnected state, the first and second springs provide pre-tension to the moving parts to prevent shaking and abnormal noise during transportation. After docking, the compressed first and second springs continue to provide pre-tension to the connecting platform and the second connecting cover, while the moving spring provides elasticity to the rotating head, ensuring that the straightening block and the straightening head fit tightly together. This effectively reduces gaps that may be caused by vibration or thermal expansion and contraction, ensuring that the connection structure remains stable during long-term operation and preventing loosening.

[0020] 4. When multiple bipolar plates are connected and require frequent lifting and handling, lifting the whole assembly upwards will cause the connection force to be mainly applied to the rotating heads and locking blocks of each connecting platform. As the whole assembly is lifted, the locking plate is simultaneously subjected to the gravity transmitted from the support plate of the upper bipolar plate. The end of the locking plate moves downwards, while the other end moves upwards through the extension plate and is limited by the locking seat, preventing it from rotating. This prevents the entire locking plate from moving downwards and thus shares the weight of the upper bipolar plate, thereby reducing the load on the rotating heads, locking blocks, and other locking components and protecting the core connection structure. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a structural breakdown diagram of the present invention; Figure 3 This is the present invention. Figure 3 A magnified structural diagram at point A; Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 5 This is a partial structural breakdown diagram of the present invention; Figure 6 This is a three-dimensional structural diagram of the connecting platform of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point B; Figure 8 This is a partial structural schematic diagram of the conical sleeve of the present invention; Figure 9 This is a partial structural schematic diagram of the connecting platform of the present invention; Figure 10 This is a partial three-dimensional structural diagram of the bottom of the present invention; Figure 11 This is the present invention. Figure 10 A structural breakdown diagram; Figure 12 This is a schematic diagram of the structure of the rotating head of the present invention; Figure 13 This is a partial structural schematic diagram of the top cover of the present invention; Figure 14 This is a schematic diagram of the bottom structure of the card holder of the present invention; Figure 15 This is the present invention. Figure 14 A magnified structural diagram at point C.

[0023] The annotations in the attached figures are explained as follows: 1. Bipolar plate; 101. Mounting port; 2. Conical sleeve; 201. First connecting cover; 202. Second connecting cover; 203. Snap ring; 204. Support plate; 204a. Clearance groove; 205. Top plate; 206. First guide post; 207. First spring; 3. Connecting platform; 301. Connecting plate; 302. Second guide post; 303. Second spring; 304. Connecting cylinder; 304a. Connecting joint; 304b. 305. Slot; 306. Rotating head; 307. Slot; 308. Rotating head; 309. Slot block; 3000. Correcting block; 30000. Guide slope; 301. Slider; 302. Movable spring; 303. Connecting rod; 310. Guide groove; 310a. Correcting port; 311. Correcting head; 4. Assist seat; 401. Assist spring; 5. Top cover; 502. Connecting cylinder; 503. Buckle plate; 6. Slot seat; 601. Slot plate; 601a. ​​Extension plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] See Figures 1-15 As shown, the present invention provides a conveniently installed hydrogen fuel cell bipolar plate, including a bipolar plate 1 and a conical sleeve 2. The conical sleeve 2 is provided through each of the four corners of the bipolar plate 1. The bottom of the conical sleeve 2 is snapped with a vertically movable connecting platform 3. The vertically adjacent connecting platforms 3 are connected end to end to connect multiple bipolar plates 1. A connecting cylinder 304 is fixed in the middle of the connecting platform 3. The top of the connecting cylinder 304 is a connector 304a with a diameter smaller than the inner diameter of the connecting cylinder 304. A rotating head 305 is rotatably mounted on the top of the connector 304a. A guide groove 310 is provided inside the connecting cylinder 304 (see details). Figures 14-15The rotating head 305 has sliders 307 fixed on both sides that are adapted to the guide groove 310. The top of the guide groove 310 has a correction port 310a perpendicular to the guide groove 310. Multiple correction heads 311 are fixed on the inner wall of the top of the connecting cylinder 304 (see details). Figures 14-15 The top of the connector 304a is fixed with a correction block 306 that matches the gap of the correction head 311. When the upper and lower adjacent connecting platforms 3 are connected, the slider 307 moves upward along the adjacent guide groove 310, the correction block 306 connects with the correction head 311 and pushes the rotating head 305 to rotate, so that the slider 307 slides into the correction port 310a and locks the relative position of the two connecting platforms 3.

[0026] When two adjacent connecting platforms 3 are docked, the rotating head 305 and its slider 307 on the lower connecting platform 3 will first align with and enter the opening of the connecting cylinder 304 at the bottom of the upper connecting platform 3. As the two connecting platforms 3 approach each other, the slider 307 will slide upward along the guide groove 310 on the inner wall of the upper connecting cylinder 304. During this upward sliding process, the straightening block 306 fixed on the top of the lower connecting joint 304a will contact the straightening head 311 fixed on the inner wall of the top of the upper connecting cylinder 304. Due to the mutual adaptation of the straightening block 306 and the straightening head 311, their contact will push the rotating head 305 to rotate relative to the connecting joint 304a. When the rotating head 305 rotates to a predetermined angle, the sliders 307 on both sides of it will align with the straightening opening 310a at the top of the guide groove 310, thereby locking the relative position of the two connecting platforms 3 in the axial direction and completing the docking.

[0027] As an optional implementation, a locking block 305a is fixed to the bottom of the rotating head 305, and a slot 304b is provided at the top of the connecting cylinder 304 to accommodate the rotation of the locking block 305a. Two movable springs 308 are fixed in the middle section of the locking block 305a, which respectively abut against the rotating head 305 and the slot 304b (see details). Figure 12 When the rotating head 305 mates with the connecting cylinder 304, the movable spring 308 is compressed to provide an upward elastic force to the rotating head 305, causing the straightening block 306 to mate with the straightening head 311. The sides of the straightening block 306 are all inclined guide slopes 306a to guide the straightening head 311 to move along the guide slopes 306a. A connecting rod 309 is slidably connected between the locking block 305a and the locking groove 304b (see details). Figure 12The connecting rod 309 connects the locking block 305a and the slot 304b. This arrangement ensures that when adjacent connecting platforms 3 move closer together and the lower rotating head 305 enters the upper connecting cylinder 304, the locking block 305a at the bottom of the rotating head 305 enters the slot 304b. As the rotating head 305 moves upward, the movable spring 308 is gradually compressed, accumulating upward elastic force. This elastic force continuously acts on the rotating head 305, causing the straightening block 306 fixed to the top of the connector 304a to guide the inclined surface 3... When 06a comes into contact with the straightening head 311 inside the upper connecting cylinder 304, pressure is applied. As the two connecting platforms 3 continue to approach each other, the straightening head 311 slides along the guide slope 306a of the straightening block 306. This sliding force drives the rotating head 305 to rotate. During the rotation of the rotating head 305, the locking block 305a at its bottom rotates synchronously in the locking groove 304b. The connecting rod 309 always connects the locking block 305a and the locking groove 304b to prevent them from separating and guides and limits the rotation.

[0028] A first connecting cover 201 is fixed to the bottom of the conical sleeve 2. A second connecting cover 202 is movably connected to the bottom of the first connecting cover 201. Both the first connecting cover 201 and the second connecting cover 202 are conical shells whose diameter gradually decreases from top to bottom. The top of the connecting platform 3 is fixedly connected to the second connecting cover 202 to connect the conical sleeve 2. The diameters of the connecting platform 3, the second connecting cover 202, and the first connecting cover 201 gradually decrease from top to bottom. The conical sleeve 2 can move up and down to allow the connecting platform 3 and the second connecting cover 202 to gradually retract and enter the conical sleeve 2 and the first connecting cover 201. In the retracted state, adjacent conical sleeves 2 can be combined and fitted together to align the adjacent connecting platforms 3. A retaining ring 203 adapted to the outer diameter of the first connecting cover 201 is fixed to the bottom of the inner wall of the conical sleeve 2 so that the inside of the conical sleeve 2 adapts to the external shape of the first connecting cover 201 and the conical sleeve 2. 01 A support plate 204 is fixed at the top. A clearance groove 204a is provided in the middle of the support plate 204. The diameter of the clearance groove 204a is larger than the diameter of the connecting platform 3 so that both the upper and lower adjacent connecting platforms 3 can pass through the clearance groove 204a. The upper and lower adjacent connecting platforms 3 are connected by overlapping and docking through the clearance groove 204a to connect the upper and lower adjacent conical sleeves 2. With this configuration, when it is necessary to connect two upper and lower adjacent bipolar plates 1, the conical sleeve 2 of the upper bipolar plate 1 is first moved downward until the connecting platform 3 is constrained by the support plate 204 and the clearance groove 204a and cannot move downward. At this time, the bipolar plate 1 is pressed down, so that the second connecting cover 202 and the connecting platform 3 retract into the top conical sleeve 2 and the upper and lower conical sleeves 2 overlap. During this process, the lower connecting platform 3 will pass through the clearance groove 204a on the upper support plate 204, and the upper connecting platform 3 will pass through the clearance groove 204a on the lower support plate 204. As the two conical sleeves 2 are further fitted together, the upper and lower connecting platforms 3 eventually overlap and dock in the area of ​​the clearance groove 204a. At the same time, the retaining ring 203 on the inner wall of the lower conical sleeve 2 will fit against the outer wall of the upper first connecting cover 201, completing the initial positioning and combination of the two conical sleeves 2.

[0029] The top of the second connecting cover 202 is fixed with a top plate 205. Multiple first guide posts 206, whose middle portions are slidably connected to the support plate 204, are fixed to the top of the top plate 205 to prevent misalignment between the second connecting cover 202 and the first connecting cover 201. A connecting plate 301 is fixed to the top of the connecting platform 3. Multiple second guide posts 302, whose middle portions are slidably connected to the top plate 205, are fixed to the top of the connecting plate 3 to prevent misalignment between the connecting platform 3 and the second connecting cover 202. The first guide posts 206 and second guide posts 302 ensure that adjacent connecting platforms 3 are vertically aligned. A first spring 207, with its two ends abutting against the support plate 204 and the top plate 205, is sleeved in the middle of the first guide post 206. A second spring 303, with its two ends abutting against the top plate 205 and the connecting plate 301, is sleeved in the middle of the second guide post 302. When the bipolar plates 1 are connected vertically, the conical sleeve 2 gradually retracts the second connecting cover 202, the first connecting cover 201, and the connecting platform 3, compressing the first spring 207 and the second spring. 303. After the upper and lower adjacent connecting platforms 3 are docked, the first spring 207 and the second spring 303 are in a compressed state, continuously providing pre-tightening force to the second connecting cover 202 and the connecting platform 3. With this configuration, when the upper and lower bipolar plates 1 are connected, the downward pressing action of the upper conical sleeve 2 will gradually pull the internal second connecting cover 202 and connecting platform 3 inward. During this process, the top plate 205 will move relative to the support plate 204, thereby compressing the first spring 207. At the same time, the connecting platform 3 will displace relative to the top plate 205, thereby compressing the second spring 303. When the upper and lower adjacent connecting platforms 3 are docked, the first spring 207 and the second spring 303 are both in a compressed state. At this time, the compressed first spring 207 will continuously apply pre-tightening force to the top plate 205 and the second connecting cover 202, while the compressed second spring 303 will continuously apply pre-tightening force to the connecting platform 3, thereby ensuring that the components remain stable after docking and avoiding loosening.

[0030] The top of the conical sleeve 2 is detachably connected to a top cover 5. A docking cylinder 501 is fixed to the bottom of the top cover 5 to connect to adjacent connecting cylinders 304. Two symmetrically distributed annular buckle plates 502 are fixed to the bottom of the docking cylinder 501. The gap between the buckle plates 502 is greater than the width of the slider 307 to allow the slider 307 to enter the interior of the docking cylinder 501 (see details). Figure 13The rotating head 305 rotates to align the slider 307 with the buckle plate 502, fixing the height of the rotating head 305 and the connector. The top cover 5 is located in the middle of the top conical sleeve 2. The bipolar plate 1 has multiple mounting holes 101 in the middle, and the mounting holes 101 of adjacent bipolar plates 1 correspond vertically to connect after the bipolar plates 1 are fixed. With this configuration, after the entire stack is completed, the top cover 5 is installed on the top conical sleeve 2. During the installation process, the gap between the two buckle plates 502 at the bottom of the docking cylinder 501 will first align and fit into the slider 307 of the rotating head 305 inside the top connecting cylinder 304. As the top cover 5 is pressed down, the slider 307 will pass through the gap and enter the docking cylinder 5. Inside 01, when the top cover 5 is in place, rotating the top cover 5 will cause the docking cylinder 501 and the buckle plate 502 to rotate together. The rotation of the buckle plate 502 will cause the gap between the slider 307 and the buckle plate 502 to be misaligned, so that the slider 307 is stuck between the buckle plate 502 and the docking cylinder 501 and cannot be separated from the top cover 5. Under the pre-tightening force of the first spring 207 and the second spring 303, the connecting platform 3 will be continuously subjected to a downward force, and the top cover 5 will be subjected to a downward force, thus fastening to the top of the conical sleeve 2, completing the fixation of the position of the topmost connecting platform 3. At the same time, the mounting ports 101 on all bipolar plates 1 have been automatically aligned and can be further reinforced by connecting components such as bolts. A mounting base 6 is fixed to the middle of the outer wall of the connecting platform 3. Multiple mounting plates 601 are hinged to the outer periphery of the mounting base 6. The outer diameter of the mounting plates 601 is larger than the diameter of the clearance groove 204a to fit the bottom of the support plate 204. An extension plate 601a is fixed to the bottom of the mounting plates 601, and the extension plate 601a fits the bottom of the mounting base 6 (see details). Figure 14 After adjacent bipolar plates 1 are connected, the clamping plate 601 can fit against the bottom of the support plate 204 during the overall lifting and transportation of the bipolar plates 1, thereby sharing the load on the clamping block 305a. Multiple assisting seats 4 are fixed on the outer wall of the connecting platform 3, and assisting springs 401 are fixed between the assisting seats 4 and the adjacent clamping plates 601 (see details). Figure 7After the connecting platform 3 enters the adjacent conical sleeve 2, it is pressed by the relief groove 204a, causing the clamping plate 601 to rise and compress the assist spring 401. After the clamping plate 601 enters the bottom of the conical sleeve 2 through the relief groove 204a, the assist spring 401 resets the clamping plate 601. With this configuration, when the upper and lower adjacent connecting platforms 3 are docked, the clamping plate 601 on the connecting platform 3 will move upward with the connecting platform 3. When the clamping plate 601 contacts the edge of the relief groove 204a of the support plate 204 on the lower conical sleeve 2, the edge of the relief groove 204a will press the clamping plate. Plate 601 is lifted upwards to overcome the elastic force of the assist spring 401, and the connecting platform 3 continues to move upwards. The lifted plate 601 will pass through the clearance groove 204a. After the plate 601 has completely passed through the clearance groove 204a and entered the internal space of the upper conical sleeve 2, the compressed assist spring 401 will release its stored elastic force, pushing the plate 601 to swing downwards and return it to the horizontal reset state. At this time, the unfolded plate 601 is located below the upper support plate 204, providing a bearing function for the subsequent handling of the bipolar plate 1.

[0031] Using the above structure, when stacking bipolar plates 1, the conical sleeve 2 of the upper bipolar plate 1 is aligned with the conical sleeve 2 of the lower bipolar plate 1, and then pressed down directly. During this process, the bottom connecting platform 3 of the upper conical sleeve 2 first contacts the first connecting cover 201 of the lower conical sleeve 2, and then penetrates into the clamping plate 601, finally fitting into the clearance groove 204a of the clamping plate 601. As the upper bipolar plate 1 continues to press down, the second connecting cover 202 and the connecting platform 3 gradually contract upwards, compressing the first spring 207 and the second spring 303. Since the diameters of the conical sleeve 2, the first connecting cover 201, the second connecting cover 202, and the connecting platform 3 gradually decrease from top to bottom, the connecting platform 3 will automatically center itself when it enters the conical sleeve 2 of the lower bipolar plate 1, guided by its conical sidewall. As the upper connecting platform 3 enters the interior of the lower conical sleeve 2, its bottom connecting cylinder 304 is still not connected to the lower connecting joint 304a. At this time, the two bipolar plates 1 that are joined together are picked up and joined to another bipolar plate 1. During this process, the middle bipolar plate 1 repeats the pressing process of the upper bipolar plate 1, finally making the middle bipolar plate The connecting platform 3 of the middle layer bipolar plate 1 moves upward and aligns with the connecting platform 3 of the upper layer bipolar plate 1, so that the mating joint 304a of the middle layer bipolar plate 1 penetrates into the upper layer connecting cylinder 304. This causes the slider 307 to slide upward along the guide groove 310 of the upper layer connecting cylinder 304 until the straightening block 306 of the middle layer connecting platform 3 contacts the straightening head 311 at the top of the upper layer connecting cylinder 304. The guide inclined surface 306a of the straightening block 306 pushes the rotating head 305 to rotate, and finally causes the slider 307 to be inserted into the straightening port 310a. During the alignment process of the straightening head 311 and the straightening block 306, the movable spring 308 is compressed and continuously provides upward force to the rotating head 305, which ultimately assists in pushing the straightening head 311 to align with the straightening block 306, thereby locking the connecting platform 3 of the middle layer and the upper layer bipolar plate 1. At this time, the alignment of the three bipolar plates 1 is completed, and the two bipolar plates 1 located on the upper layer are locked together. The above actions can be repeated to align subsequent bipolar plates 1. During this process, when the first spring 207 and the second spring 303 are not docked, they provide a continuous downward preload to the movable second connecting cover 202 and the connecting platform 3, preventing the components from shaking or colliding during transportation or handling. During the docking process, as the first spring 207 and the second spring 303 are gradually compressed, their stored elasticity is converted into a continuous preload after the bipolar plates 1 dock, so that each component in the docked conical sleeve 2 is subjected to the preload from the first spring 207 and the second spring 303, preventing the components from shaking after each bipolar plate 1 is locked, thus affecting the locking effect. When multiple bipolar plates 1 are connected, the locked bipolar plates 1 need to be frequently lifted and moved. When the whole is lifted upward, the connecting force is mainly applied to the rotating head 305 and the locking block 305a of each connecting platform 3. The bottom of the locking plate 601 fixed to the outer wall of the connecting platform 3 is attached to the bottom of the support plate 204 of the lower connecting platform 3. As the whole is lifted, the locking plate 601 is simultaneously subjected to the gravity transmitted from the support plate 204 of the upper bipolar plate 1. The end of the locking plate 601 moves downward while the other end moves upward through the extension plate 601a and is limited by the locking seat 6 and cannot rotate, so that the entire locking plate 601 cannot move downward and share the weight of the upper bipolar plate 1. By pressing, the docking and rotational interlocking of the connecting platform 3 between multiple bipolar plates 1 can be completed. By using the cooperation of the straightening block 306 and the straightening head 311, the downward pressure of docking is converted into the rotational force of the rotating head 305, so that the slider 307 slides into the straightening port 310a to achieve locking. No additional tools are required, which realizes rapid installation and shortens the assembly time of the fuel cell stack.

[0032] When stacking bipolar plates 1, the conical sleeve 2 of the upper bipolar plate 1 is aligned with the conical sleeve 2 of the lower bipolar plate 1 and pressed down directly. Utilizing the structure of the conical sleeve 2, the first connecting cover 201, the second connecting cover 202 and the connecting platform 3 with their diameters gradually decreasing from top to bottom, the connecting platform 3 is guided by its conical sidewall and automatically aligns when it enters the lower conical sleeve 2, without the need for manual alignment. In the unconnected state, the first spring 207 and the second spring 303 provide preload to the moving parts to prevent shaking and abnormal noise during transportation. After the connection is completed, the compressed first spring 207 and the second spring 303 continue to provide preload to the connecting platform 3 and the second connecting cover 202, while the movable spring 308 provides elasticity to the rotating head 305, ensuring that the straightening block 306 and the straightening head 311 fit tightly together. This can effectively reduce the gap that may be caused by vibration or thermal expansion and contraction, and ensure that the connection structure remains stable during long-term operation and avoids loosening.

[0033] When multiple bipolar plates 1 are connected and require frequent lifting and handling, the entire assembly is lifted upwards. The connecting force is mainly applied to the rotating head 305 and the locking block 305a of each connecting platform 3. As the assembly is lifted, the locking plate 601 is simultaneously subjected to the gravity transmitted from the support plate 204 of the upper bipolar plate 1. One end of the locking plate 601 moves downwards, while the other end moves upwards through the extension plate 601a and is limited by the locking seat 6, preventing it from rotating. This prevents the entire locking plate 601 from moving downwards and thus sharing the weight of the upper bipolar plate 1, thereby reducing the load on the locking components such as the rotating head 305 and the locking block 305a, and protecting the core connection structure.

[0034] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A conveniently installed bipolar plate for a hydrogen fuel cell, characterized in that: It includes a bipolar plate (1) and a conical sleeve (2). The four corners of the bipolar plate (1) are provided with conical sleeves (2). The bottom of the conical sleeve (2) is engaged with a vertically movable connecting platform (3). The vertically adjacent connecting platforms (3) are connected end to end to connect multiple bipolar plates (1). A connecting cylinder (304) is fixed in the middle of the connecting platform (3). The top of the connecting cylinder (304) is a connector (304a) with a diameter smaller than the inner diameter of the connecting cylinder (304). A rotating head (305) is rotatably mounted on the top of the connector (304a). A guide groove (310) is provided inside the connecting cylinder (304). Slider blocks (307) adapted to the guide groove (310) are fixed on both sides of the rotating head (305). A correction port (31) perpendicular to the guide groove (310) is provided at the top of the guide groove (310). 0a), the inner wall of the top of the connecting cylinder (304) is fixed with a plurality of straightening heads (311), and the top of the mating head (304a) is fixed with a straightening block (306) that is adapted to the gap of the straightening head (311). When the upper and lower adjacent connecting platforms (3) are mated, the slider (307) moves up along the adjacent guide groove (310), the straightening block (306) is mated with the straightening head (311) and pushes the rotating head (305) to rotate, so that the slider (307) slides into the straightening port (310a) to lock the relative position of the two connecting platforms (3).

2. The easily installable hydrogen fuel cell bipolar plate according to claim 1, characterized in that: The bottom of the rotating head (305) is fixed with a locking block (305a), and the top of the connecting cylinder (304) is provided with a locking groove (304b) to accommodate the rotation of the locking block (305a). Two movable springs (308) are fixed in the middle section of the locking block (305a) and respectively abut against the rotating head (305) and the locking groove (304b). When the rotating head (305) mates with the connecting cylinder (304), the movable springs (308) are compressed into a rotating head (305a). 5) Provide an upward elastic force to connect the correction block (306) with the correction head (311). The sides of the correction block (306) are all inclined guide slopes (306a) to guide the correction head (311) to move along the guide slopes (306a). A connecting rod (309) is slidably connected between the locking block (305a) and the locking groove (304b). The connecting rod (309) connects the locking block (305a) and the locking groove (304b).

3. The easily installable hydrogen fuel cell bipolar plate according to claim 1, characterized in that: The bottom of the conical sleeve (2) is fixed with a first connecting cover (201), and the bottom of the first connecting cover (201) is movably connected with a second connecting cover (202). The first connecting cover (201) and the second connecting cover (202) are both conical shells with diameters gradually decreasing from top to bottom. The top of the connecting platform (3) is fixedly connected to the second connecting cover (202) to connect the conical sleeve (2). The diameters of the connecting platform (3), the second connecting cover (202) and the first connecting cover (201) gradually decrease from top to bottom. The conical sleeve (2) can move up and down to allow the connecting platform (3) and the second connecting cover (202) to gradually shrink to enter the conical sleeve (2) and the first connecting cover (201). The conical sleeves (2) that are adjacent to each other can be combined and fitted together in the shrinking state to allow the connecting platforms (3) that are adjacent to each other to dock.

4. The easily installable hydrogen fuel cell bipolar plate according to claim 3, characterized in that: The bottom of the inner wall of the conical sleeve (2) is fixed with a retaining ring (203) that is adapted to the outer diameter of the first connecting cover (201) so that the inside of the conical sleeve (2) is adapted to the outer shape of the first connecting cover (201) and the conical sleeve (2).

5. The easily installable hydrogen fuel cell bipolar plate according to claim 3, characterized in that: The first connecting cover (201) has a support plate (204) fixed on top. The support plate (204) has a relief groove (204a) in the middle. The diameter of the relief groove (204a) is larger than the diameter of the connecting platform (3) so that the upper and lower adjacent connecting platforms (3) can pass through the relief groove (204a). The upper and lower adjacent connecting platforms (3) overlap and connect to the upper and lower adjacent conical sleeves (2) through the relief groove (204a).

6. The easily installable hydrogen fuel cell bipolar plate according to claim 3, characterized in that: The top of the second connecting cover (202) is fixed with a top plate (205). The top of the top plate (205) is fixed with a plurality of first guide columns (206) whose middle parts are slidably connected to the support plate (204) to avoid misalignment between the second connecting cover (202) and the first connecting cover (201). The top of the connecting platform (3) is fixed with a connecting plate (301). The top of the connecting plate (301) is fixed with a plurality of second guide columns (302) whose middle parts are slidably connected to the top plate (205) to avoid misalignment between the connecting platform (3) and the second connecting cover (202). The first guide columns (206) and the second guide columns (302) make the upper and lower adjacent connecting platforms (3) vertically connected.

7. The easily installable hydrogen fuel cell bipolar plate according to claim 6, characterized in that: The first guide post (206) is fitted with a first spring (207) with both ends abutting against the support plate (204) and the top plate (205) in the middle. The second guide post (302) is fitted with a second spring (303) with both ends abutting against the top plate (205) and the connecting plate (301) in the middle. When the bipolar plates (1) are connected vertically, the conical sleeve (2) gradually pulls the second connecting cover (202), the first connecting cover (201) and the connecting platform (3) into the interior and compresses the first spring (207) and the second spring (303). After the upper and lower adjacent connecting platforms (3) are connected, the first spring (207) and the second spring (303) are in a compressed state, continuously providing pre-tightening force for the second connecting cover (202) and the connecting platform (3).

8. The easily installable hydrogen fuel cell bipolar plate according to claim 1, characterized in that: The top of the conical sleeve (2) is detachably connected to a top cover (5). The bottom of the top cover (5) is fixed with a docking cylinder (501) to connect to an adjacent connecting cylinder (304). The bottom of the docking cylinder (501) is fixed with two symmetrically distributed annular buckles (502). The gap between the buckles (502) is greater than the width of the slider (307) to accommodate the slider (307) entering the docking cylinder (501). The rotating head (305) rotates to dock the slider (307) with the buckles (502) to fix the height of the rotating head (305) and the connecting head. The top cover (5) is located in the middle of the topmost conical sleeve (2).

9. The easily installable hydrogen fuel cell bipolar plate according to claim 1, characterized in that: A card holder (6) is fixed in the middle of the outer wall of the connecting platform (3). Multiple card plates (601) are hinged to the outer periphery of the card holder (6). The outer diameter of the card plate (601) is larger than the diameter of the clearance groove (204a) to fit the bottom of the support plate (204). An extension plate (601a) is fixed to the bottom of the card plate (601). The extension plate (601a) fits the bottom of the card holder (6). After the adjacent bipolar plates (1) are connected, the card plates (601) can fit the bottom of the support plate (204) when the bipolar plates (1) are lifted as a whole, thus separating them. The load on the clamping block (305a) is supported by multiple auxiliary seats (4) fixed on the outer wall of the connecting platform (3). An auxiliary spring (401) is fixed between the auxiliary seat (4) and the adjacent clamping plate (601). After the connecting platform (3) enters the adjacent conical sleeve (2), the clamping plate (601) is lifted by the relief groove (204a) and the auxiliary spring (401) is compressed. After the clamping plate (601) enters the bottom of the conical sleeve (2) through the relief groove (204a), the auxiliary spring (401) resets the clamping plate (601).

10. The easily installable hydrogen fuel cell bipolar plate according to claim 1, characterized in that: The bipolar plate (1) has multiple mounting ports (101) in the middle, and the mounting ports (101) of adjacent bipolar plates (1) are aligned vertically to be connected after the bipolar plates (1) are fixed.

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