Hydrogen fuel electric pile provided with titanium alloy bipolar plate

Abstract

The invention discloses a hydrogen fuel stack provided with titanium alloy bipolar plates, and belongs to the technical field of hydrogen energy application. Comprising a rear plate, a plurality of threaded grooves are symmetrically formed in the front surface of the rear plate, a front cover is arranged on the front surface of the rear plate, a plurality of locking holes are symmetrically formed in the front surface of the front cover, locking rods are slidably connected into the locking holes, and threaded rods are fixedly connected to the rear ends of the locking rods; the threaded rods are in threaded connection with the adjacent threaded grooves, and T-shaped rear clamping grooves are symmetrically formed in the front surface of the rear plate. For installation of the fan cooling plate, through an innovative locking cavity structure, the fan cooling plate only needs to be in preliminary butt joint with a front cover through a T-shaped front clamping groove, a cylinder is rotated, a cam is used for extruding a transverse plate to drive a locking plate to be clamped with a limiting clamping groove, installation can be completed, and operation is easy and efficient. And the locking can be unlocked by rotating the cylinder again.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy application, and in particular to a hydrogen fuel cell stack equipped with titanium alloy bipolar plates. Background Art

[0002] In the field of hydrogen fuel cell stacks, efficient and stable operation has always been the core research goal. Early hydrogen fuel cell stacks had many defects in their structural design. For example, the cooling system of traditional fuel cell stacks is complexly connected to the main structure, and the fan cooling plate is extremely inconvenient to install and remove. When the internal maintenance of the fuel cell stack or the replacement of cooling components is required, it consumes a lot of time and manpower, seriously affecting the normal use and maintenance efficiency of the equipment. Moreover, the fixing method of the various components inside the fuel cell stack is not stable enough. During long-term operation, it is easy for components to loosen due to factors such as vibration and temperature changes, which in turn affects the performance of the fuel cell stack and even causes the fuel cell stack to fail. At the same time, the distribution of hydrogen and oxygen is not uniform, which makes it impossible for the electrochemical reaction to proceed fully, and the power generation efficiency of the fuel cell stack is low.

[0003] In this context, developing a hydrogen fuel cell stack that is easy to install, has a stable structure and high performance has become an urgent problem to be solved in the industry. Summary of the Invention

[0004] Purpose of the invention: The purpose of the present invention is to provide convenient installation and maintenance; another purpose of the present invention is to ensure stable operation of the fuel cell stack and extend the service life of the equipment.

[0005] Technical solution: A hydrogen fuel cell stack equipped with titanium alloy bipolar plates, comprising a rear plate, a front surface of the rear plate symmetrically provided with a plurality of thread grooves, a front surface of the rear plate provided with a front cover, a front surface of the front cover symmetrically provided with a plurality of locking holes, a locking rod slidably connected to the interior of the locking hole, the rear ends of the locking rods are fixedly connected to threaded rods, and the threaded rods are threadedly connected to adjacent thread grooves, a T-shaped rear slot is symmetrically provided on the front surface of the rear plate, a T-shaped front slot is symmetrically provided on the rear surface of the front cover, a fan cooling plate is jointly engaged with the interior of the T-shaped rear slot, the front surface of the rear plate and the rear surface of the front cover are jointly engaged with a hydrogen fuel cell stack body, and the outer side wall of the hydrogen fuel cell stack body is engaged with a plurality of titanium alloy bipolar plates.

[0006] Furthermore, the front surface of the front cover is fixedly connected to a locking cavity, a rotating groove is provided inside the locking cavity, a cylinder is rotatably connected to the inner rear surface of the rotating groove, a cam is symmetrically fixedly connected to the outer wall of the cylinder, a sliding opening is symmetrically provided on the inner wall of the rotating groove, a horizontal plate is slidably connected to the inside of the sliding opening, and arc grooves are provided on opposite sides of the horizontal plate.

[0007] Furthermore, the outer wall of the horizontal plate is fixedly connected to the outer wall of the locking cavity with a connecting plate, and the outer wall of the connecting plate is symmetrically fixedly connected to the locking plate. The front surface of the front cover is symmetrically provided with sliding grooves, and the sliding grooves are connected to the T-shaped front slots. The front of the outer wall of the fan cooling plate is provided with a limiting slot, and the locking plates are engaged with the adjacent limiting slots.

[0008] Furthermore, a spring is provided on the front surface of the cylinder, a pulling column is slidably connected to the inside of the spring, a spring is wound around the outer wall of the pulling column, the front end of the spring is fixedly connected to the inner wall of the spring groove, the rear end of the spring is fixedly connected to the outer wall of the pulling column, a square cavity is provided on the rear surface of the pulling column, a limiting block is fixedly connected to the inner front surface of the spring groove, and the limiting block is slidably connected to the square cavity.

[0009] Furthermore, a circular groove is provided on the outer side wall of the fan cooling plate, a motor is fixedly connected to the inside of the circular groove, and fan blades are symmetrically fixedly connected to the output end of the motor.

[0010] Furthermore, the front end of the pulling column is fixedly connected to a locking horizontal plate, the rear surface of the locking horizontal plate is symmetrically fixedly connected to positioning columns, and the front surface of the locking cavity is symmetrically fixedly connected to a plurality of locking circular holes.

[0011] Beneficial effects: For the installation of the fan cooling plate, through the innovative locking cavity structure, you only need to preliminarily connect the fan cooling plate with the front cover through the T-shaped front slot, rotate the cylinder, and use the cam to squeeze the horizontal plate to drive the locking plate to engage with the limit slot to complete the installation. The operation is simple and efficient. Disassembly is also convenient. Just turn the cylinder again to release the lock. In the cylindrical operating structure, by pulling the locking horizontal plate to drive the pulling column to overcome the spring force, the positioning column is disengaged from the locking hole, and the cylinder can be rotated freely. After the operation is completed, the lock is automatically reset. This design greatly shortens the time for installation and disassembly of the fan cooling plate. When the battery stack needs maintenance or replacement of cooling components, it can significantly improve work efficiency, reduce equipment downtime, reduce maintenance costs, and greatly facilitate the staff's daily maintenance and inspection of the battery stack; The motor inside the fan cooling plate drives the blades to rotate rapidly, generating a strong airflow that promptly removes heat from the stack, ensuring stable operation within the appropriate temperature range. Furthermore, the rear plate and front cover securely hold the components in place through the threaded rods and threaded grooves, and the locking rods and locking holes. The cams, arc grooves, and cylindrical positioning structures prevent components from loosening due to vibration and other factors during operation, ensuring the stability of the stack's operation. This ensures continuous and efficient operation, providing reliable energy support for relevant application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the locking cavity of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the front cover of the present invention; Figure 4 It is a schematic diagram of the overall structure of the fan cooling plate of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of a cylinder of the present invention; Figure 6 It is a schematic diagram of the overall structure of the hydrogen fuel cell stack body of the present invention.

[0013] In the figure: 1. rear plate; 2. threaded groove; 3. front cover; 4. locking hole; 5. locking rod; 6. threaded rod; 7. T-shaped rear slot; 8. T-shaped front slot; 9. fan cooling plate; 10. hydrogen fuel cell stack body; 11. titanium alloy bipolar plate; 12. locking cavity; 13. rotating groove; 14. cylinder; 15. cam; 16. sliding mouth; 17. horizontal plate; 18. arc groove; 19. connecting plate; 20. locking plate; 21. sliding groove; 22. limiting slot; 23. spring groove; 24. pulling column; 25. square cavity; 26. limiting block; 27. locking horizontal plate; 28. positioning column; 29. locking circular hole; 30. circular groove; 31. motor; 32. fan blade; 33. spring. DETAILED DESCRIPTION

[0014] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0015] like Figures 1-6 As shown, a hydrogen fuel cell stack equipped with titanium alloy bipolar plates is provided, comprising a rear plate 1, a front surface of the rear plate 1 symmetrically provided with a plurality of thread grooves 2, a front surface of the rear plate 1 provided with a front cover 3, a front surface of the front cover 3 symmetrically provided with a plurality of locking holes 4, a locking rod 5 slidably connected to the interior of the locking hole 4, a rear end of the locking rod 5 is fixedly connected to a threaded rod 6, and the threaded rod 6 is threadedly connected to the adjacent thread groove 2, a front surface of the rear plate 1 symmetrically provided with a T-shaped rear card groove 7, a rear surface of the front cover 3 symmetrically provided with a T-shaped front card groove 8, the interior of the T-shaped rear card groove 7 and the T-shaped front card groove 8 are jointly engaged with a fan cooling plate 9, the front surface of the rear plate 1 and the rear surface of the front cover 3 are jointly engaged with a hydrogen fuel cell stack body 10, and the outer side wall of the hydrogen fuel cell stack body 10 is engaged with a plurality of titanium alloy bipolar plates 11; When the hydrogen fuel cell stack begins operation, hydrogen and oxygen enter the stack body 10 through their respective channels. Inside the stack, hydrogen is decomposed into hydrogen ions and electrons by the action of a catalyst. The hydrogen ions migrate through the proton exchange membrane to the cathode, while the electrons flow through an external circuit to form an electric current, powering external devices. In this process, the titanium alloy bipolar plate 11 plays a crucial role. It not only provides structural support for the stack body but also evenly distributes hydrogen and oxygen, promoting the electrochemical reaction. Furthermore, the excellent conductivity of the titanium alloy bipolar plate facilitates electron transport, improving the stack's power generation efficiency. As the electrochemical reaction continues, the stack body generates heat. At this point, the fan cooling plate 9 begins operating. The fan cooling plate engages with the rear plate 1 and front cover 3 via a T-shaped rear slot 7 and a T-shaped front slot 8. The fan inside accelerates air flow, dissipating heat generated by the stack body and ensuring stable operation within the stack's optimal temperature range. During the entire process, the rear plate 1 and the front cover 3 are firmly fixed in place through the threaded connection between the threaded rod 6 and the threaded groove 2 and the cooperation between the locking rod 5 and the locking hole 4, thereby ensuring the normal operation of the fuel cell stack.

[0016] In this embodiment, the front surface of the front cover 3 is fixedly connected with a locking cavity 12, and a rotation groove 13 is opened inside the locking cavity 12. The inner rear surface of the rotation groove 13 is rotatably connected with a cylinder 14, and the outer side wall of the cylinder 14 is symmetrically fixedly connected with a cam 15. The inner side wall of the rotation groove 13 is symmetrically opened with a sliding mouth 16, and the inner side of the sliding mouth 16 is slidably connected with a horizontal plate 17. The opposite sides of the horizontal plate 17 are opened with an arc groove 18. The outer side wall of the horizontal plate 17 is located on the outer side wall of the locking cavity 12 and is fixedly connected with a connecting plate 19. The outer side wall of the connecting plate 19 is symmetrically fixedly connected with a locking plate 20. The front surface of the front cover 3 is symmetrically opened with a sliding groove 21, and the sliding groove 21 is connected with the T-shaped front card slot 8. The outer side wall of the fan cooling plate 9 is provided with a limiting card slot 22 in front, and the locking plate 20 is engaged with the adjacent limiting card slot 22. To secure the fan cooling plate 9, the plate is initially docked with the front cover 3 via the T-shaped front slot 8. The limit slot 22 on the front outer wall of the plate 9 is moved to a position relative to the locking plate 20. The cylinder 14 is then rotated, driving the symmetrical cam 15 on the outer wall to rotate synchronously. Due to the unique shape of the cam 15, it compresses the cross plate 17 during rotation. The cross plate 17 slides within the sliding opening 16, and as the cam 15 continues to rotate, the cross plate 17 moves outward. At this point, the connecting plate 19, fixed to the cross plate 17, also moves outward, driving the symmetrical locking plate 20 outward, causing it to engage with the limit slot 22. The cam 15 then engages with the arcuate slot 18, securing the fan cooling plate 9 securely to the front cover 3. During disassembly, the cylinder 14 is rotated again to disengage the locking plate 20 from the limiting slot 22 , and the cam 15 is disengaged from the arc-shaped slot 18 , and the fan cooling plate 9 can be removed.

[0017] In this embodiment, a spring groove 23 is formed on the front surface of the cylinder 14, and a pulling column 24 is slidably connected to the interior of the spring groove 23. A spring 33 is wound around the outer wall of the pulling column 24. The front end of the spring 33 is fixedly connected to the inner wall of the spring groove 23, and the rear end of the spring 33 is fixedly connected to the outer wall of the pulling column 24. A square cavity 25 is formed on the rear surface of the pulling column 24. A limiting block 26 is fixedly connected to the inner front surface of the spring groove 23, and the limiting block 26 is slidably connected to the square cavity 25. A locking horizontal plate 27 is fixedly connected to the front end of the pulling column 24, and a positioning column 28 is symmetrically fixedly connected to the rear surface of the locking horizontal plate 27. A plurality of locking circular holes 29 are symmetrically fixedly connected to the front surface of the locking cavity 12. A unique operating and positioning structure is designed at the front end of the cylinder 14. The pull post 24 slides smoothly within the spring slot 23 on the front surface of the cylinder 14. The spring 33 surrounding the pull post 24 is fixed to the inner wall of the spring slot 23 at its front end and connected to the pull post 24 at its rear end. This allows the pull post 24 to maintain its relative position due to the spring force when no external force is applied. The square cavity 25 at the rear end of the pull post 24 slides with the limiting block 26 fixed within the spring slot 23, limiting the rotation of the pull post 24 and allowing it to move only axially. The locking plate 27 fixed at the front end of the pull post 24 plays a crucial role. When the cylinder 14 needs to be rotated to install or remove the fan cooling plate 9, the locking plate 27 can be pulled, driving the pull post 24 to move forward, overcoming the spring force. At this time, the symmetrical positioning posts 28 on the rear surface of the locking plate 27 disengage from the locking circular hole 29 on the front surface of the locking cavity 12, allowing the cylinder 14 to rotate freely. After the operation is completed, the locking horizontal plate 27 is released. Under the action of the spring 33, the pulling column 24 is reset, and the positioning column 28 is re-engaged in the corresponding locking circular hole 29 to lock the cylinder 14 to prevent it from accidentally rotating. The position of the cam 15 can be fixed to ensure the stability of the entire fan cooling plate 9 installation structure.

[0018] In this embodiment, a circular groove 30 is formed on the outer wall of the fan cooling plate 9. A motor 31 is fixedly connected to the inner portion of the circular groove 30. The output end of the motor 31 is symmetrically fixedly connected to the fan blade 32. A motor 31 is fixedly mounted in the circular groove 30 on the outer wall of the fan cooling plate 9. As a power source, the motor 31 operates at high speed at its output end after startup. Since the output end is symmetrically connected to the fan blades 32, the fan blades rotate rapidly, stirring the surrounding air rapidly and generating a strong airflow, thereby efficiently cooling the hydrogen fuel cell stack.

[0019] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A hydrogen fuel cell stack equipped with a titanium alloy bipolar plate, comprising a rear plate (1), characterized in that: The front surface of the rear plate (1) is symmetrically provided with a plurality of thread grooves (2), the front surface of the rear plate (1) is provided with a front cover (3), the front surface of the front cover (3) is symmetrically provided with a plurality of locking holes (4), the interior of the locking hole (4) is slidably connected with a locking rod (5), the rear end of each locking rod (5) is fixedly connected with a threaded rod (6), and each threaded rod (6) is threadedly connected to an adjacent thread groove (2), the front surface of the rear plate (1) is symmetrically provided with a T-shaped rear card slot (7), the rear surface of the front cover (3) is symmetrically provided with a T-shaped front card slot (8), the interior of the T-shaped rear card slot (7) and the T-shaped front card slot (8) are jointly engaged and connected to a fan cooling plate (9), the front surface of the rear plate (1) and the rear surface of the front cover (3) are jointly engaged and connected to a hydrogen fuel cell body (10), and the outer side wall of the hydrogen fuel cell body (10) is engaged and connected to a plurality of titanium alloy bipolar plates (11).

2. A hydrogen fuel cell stack equipped with titanium alloy bipolar plates according to claim 1, characterized in that: The front surface of the front cover (3) is fixedly connected to a locking cavity (12), a rotating groove (13) is provided inside the locking cavity (12), a cylinder (14) is rotatably connected to the rear surface of the rotating groove (13), a cam (15) is symmetrically fixedly connected to the outer wall of the cylinder (14), a sliding opening (16) is symmetrically provided on the inner wall of the rotating groove (13), a transverse plate (17) is slidably connected to the interior of the sliding opening (16), and arc-shaped grooves (18) are provided on opposite sides of the transverse plate (17).

3. The hydrogen fuel cell stack equipped with a titanium alloy bipolar plate according to claim 1, characterized in that: The outer side wall of the transverse plate (17) is fixedly connected to the outer side wall of the locking cavity (12) with a connecting plate (19), and the outer side wall of the connecting plate (19) is symmetrically fixedly connected to the locking plate (20). The front surface of the front cover (3) is symmetrically provided with sliding grooves (21), and the sliding grooves (21) are connected to the T-shaped front card slots (8). The outer side wall of the fan cooling plate (9) is provided with a limit card slot (22) in front, and the locking plates (20) are engaged with the adjacent limit card slots (22).

4. A hydrogen fuel cell stack equipped with titanium alloy bipolar plates according to claim 1, characterized in that: The front surface of the cylinder (14) is provided with a spring groove (23), the interior of the spring groove (23) is slidably connected to a pulling column (24), the outer wall of the pulling column (24) is wound with a spring (33), the front end of the spring (33) is fixedly connected to the inner wall of the spring groove (23), the rear end of the spring (33) is fixedly connected to the outer wall of the pulling column (24), the rear surface of the pulling column (24) is provided with a square cavity (25), the inner front surface of the spring groove (23) is fixedly connected to a limiting block (26), and the limiting block (26) is slidably connected to the square cavity (25).

5. The hydrogen fuel cell stack equipped with titanium alloy bipolar plates according to claim 1, characterized in that: A circular groove (30) is provided on the outer wall of the fan cooling plate (9), a motor (31) is fixedly connected inside the circular groove (30), and fan blades (32) are symmetrically fixedly connected to the output end of the motor (31).

6. A hydrogen fuel cell stack equipped with titanium alloy bipolar plates according to claim 1, characterized in that: The front end of the pulling column (24) is fixedly connected to a locking transverse plate (27), the rear surface of the locking transverse plate (27) is symmetrically fixedly connected to a positioning column (28), and the front surface of the locking cavity (12) is symmetrically fixedly connected to a plurality of locking circular holes (29).

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