Ultrasonic electrochemical surface modification device for bipolar plate

Abstract

The invention relates to the technical field of fuel cells, and discloses an ultrasonic electrochemical surface modification device for a bipolar plate, the ultrasonic electrochemical surface modification device comprises a cabinet body, the upper side of the cabinet body is fixedly provided with a display screen, an online conductivity meter, an ion concentration monitor, an electrolyte circulating filtration device, a mechanical arm, an electrode conversion module, a master control terminal, a peristaltic pump and a constant temperature water bath kettle; a current sensor, a shooting module and two electrode bars are fixed in the constant-temperature water bath kettle, a plurality of ultrasonic vibrators are fixed on the inner wall of the constant-temperature water bath kettle, and a material conveying device is installed on one side of the cabinet body. Through cooperation of a constant-temperature water bath kettle, a material conveying device, a master control terminal, an electrode bar, an ultrasonic vibrator, a peristaltic pump, a shooting module, an on-line conductivity instrument, an ion concentration monitor and a current sensor, the problems that in the prior art, in the bipolar plate treatment process, manual work needs to be relied on, the reaction process cannot be controlled and detected, and the working efficiency is high are solved. And the fluctuation of the product percent of pass is large.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, specifically to an ultrasonic electrochemical surface modification device for bipolar plates. Background Technology

[0002] As a core component of energy conversion equipment such as fuel cells and electrolyzers, bipolar plates play a crucial role in separating reactant gases, conducting current, supporting membrane electrode assemblies, and channeling coolant. Their surface smoothness, corrosion resistance, and conductivity directly determine the equipment's working efficiency, stability, and service life.

[0003] The current conventional processing flow for bipolar plates mostly adopts a single process in steps. First, the bipolar plates are manually placed one by one into an electrolytic cell for electrochemical treatment, relying on electrode reactions to remove surface impurities and oxide layers. Then, they are transferred to an ultrasonic cleaning device for secondary treatment, using ultrasonic vibration to peel off residual deposits.

[0004] However, conventional bipolar plate processing relies on manual labor, and the reaction process cannot be controlled or detected, resulting in significant fluctuations in product qualification rates. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an ultrasonic electrochemical surface modification device for bipolar plates, which solves the problem that existing technologies require manual labor in the bipolar plate processing, and the reaction process cannot be controlled or detected, resulting in large fluctuations in product qualification rate.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ultrasonic electrochemical surface modification device for bipolar plates, comprising a cabinet, wherein a display screen, an online conductivity meter, an ion concentration monitor, an electrolyte circulation filter, a robotic arm, an electrode conversion module, a central control terminal, a peristaltic pump, and a constant temperature water bath are fixed on the upper side of the cabinet. One end of the online conductivity meter and the ion concentration monitor are both located inside the constant temperature water bath. The output ends of the electrolyte circulation filter and the peristaltic pump are both fixed inside the constant temperature water bath. A current sensor, an imaging module, and two electrode rods are fixed inside the constant temperature water bath. One end of each of the two electrode rods is electrically connected to the electrode conversion module. Several ultrasonic transducers are fixed on the inner wall of the constant temperature water bath. A material conveying device is installed on one side of the cabinet, the material conveying device including a roller conveyor frame fixed on the upper side of the constant temperature water bath, and a bipolar plate tray sliding on the upper side of the roller conveyor frame.

[0007] The above technical solution controls the electrode switching of the electrode rod through a preset program on the main control terminal, thereby enabling the device to perform etching and deposition on the bipolar plate. By combining an ultrasonic transducer, a peristaltic pump, an imaging module, an online conductivity meter, an ion concentration monitor, and a current sensor, the problem of existing technologies relying on manual labor and being unable to control and detect the reaction process during bipolar plate processing, resulting in large fluctuations in product qualification rate, is solved.

[0008] Preferably, a feeding roller conveyor is provided below the roller conveyor frame, and a circulating chain vertical lifting mechanism is provided on one side of the feeding roller conveyor. Several brackets for placing bipolar plate trays are fixedly provided at the output end of the circulating chain vertical lifting mechanism, and the outer walls of the brackets all pass through the feeding roller conveyor and the roller conveyor frame.

[0009] Preferably, a position conversion component is fixed on the upper side of the cabinet. The position conversion component includes two baffles fixed on the upper side of the cabinet. Fixing blocks are fixed on both sides of the bipolar plate tray. A groove is provided on the upper side of the opposite side of the two baffles to cooperate with the fixing blocks for horizontal sliding.

[0010] Preferably, a guide plate is fixed on the side of the baffle near the roller conveyor frame, and the two guide plates are arranged with their opposite sides gradually moving apart by arcs.

[0011] Preferably, an electric push rod is fixed to the upper side of the cabinet, and a push plate is fixedly provided at the output end of the electric push rod. An adsorption slide is installed on the upper side of the push plate. The adsorption slide includes a support slide fixed to the upper side of the push plate. A slide rod is fixed to the inner wall of the support slide. An electromagnet is slidably connected to the outer wall of the slide rod. The outer wall of the electromagnet and the outer wall of the bipolar plate tray are fixed by magnetic adsorption. An elastic element is fixed between the electromagnet and the support slide.

[0012] Preferably, a mating fixing block groove three is provided on one side of the two baffles opposite to each other, and the upper end of the groove three is connected to the groove two.

[0013] Preferably, the two baffles have a groove 1 on one side opposite to the fixed block for sliding, the lower end of the groove 3 is connected to the groove 1, and the outer wall of the push plate is in contact with the outer wall of the bipolar plate tray.

[0014] Preferably, the outer wall of the groove 2 and the bipolar plate tray is inclined, and a support plate 1 is fixed between the two baffles and slidably connected to the lower side of the bipolar plate tray. The side of the support plate 1 away from the baffle and the outer wall of the bracket are pre-spaced.

[0015] Preferably, a support block is fixed to the upper side of the baffle, a slide rod II is fixed between the inner top wall of the support block and the inner bottom wall of the baffle, a guide slide is slidably connected to the outer wall of the slide rod II, both sides of the guide slide are slidably connected to the inner wall of the baffle, the side walls between the other two sides of the guide slide are slidably connected to both sides of the fixed block, the outer wall of the guide slide is provided with a slide groove I that cooperates with the sliding of the fixed block, and an elastic element II is fixed between the guide slide and the support block.

[0016] Preferably, a discharge roller conveyor is provided below the roller conveyor frame, the outer wall of the discharge roller conveyor passes through one side of the cabinet, and the outer wall of the bracket passes through the upper side of the discharge roller conveyor.

[0017] Working Principle: A tray containing four bipolar plates is conveyed to a roller conveyor frame via a feeding device. Following a pre-programmed sequence on the central control terminal, a robotic arm grasps the bipolar plates and places them into a constant-temperature water bath, ensuring good contact with the electrode rods. Next, the central control terminal activates an ultrasonic transducer, generating a strong cavitation effect. A peristaltic pump introduces ordinary optical tracer particles, and the particle trajectories captured by the imaging module, along with monitoring the cavitation dynamics on the bipolar plate surface, are fed back to the central control terminal for processing and analysis, and displayed on the screen. Simultaneously, an online conductivity meter tracks the electrolyte conductivity in real time, an ion concentration monitor tracks the ion concentration in real time, and a current sensor monitors the local current density, all of which are fed back to the central control terminal for processing and analysis. This allows for real-time adjustment of the power of the electrode rods and ultrasonic transducer. Through the cooperation of an electrode conversion module and an electrolyte circulation filtration device, the etching and precipitation reactions of the bipolar plates are completed. This solves the problem of existing technologies requiring manual processing of bipolar plates, where the reaction process is difficult to control and detect, leading to significant fluctuations in product yield.

[0018] This invention provides an ultrasonic electrochemical surface modification device for bipolar plates. It has the following beneficial effects:

[0019] 1. This invention forms a constant-temperature electrolytic cell through a constant-temperature water bath, and achieves automatic loading and unloading through a feeding device. The electrode switching of the electrode rod is controlled by a preset program on the central control terminal to realize the etching and precipitation functions of the device on the bipolar plate. Through the cooperation of an ultrasonic transducer, a peristaltic pump, an imaging module, an online conductivity meter, an ion concentration monitor, and a current sensor, it solves the problem that the existing technology requires manual processing of bipolar plates and the reaction process cannot be controlled and detected, resulting in large fluctuations in the product qualification rate.

[0020] 2. This invention uses the cooperation of roller conveyor frame and electric push rod to drive the bipolar plate tray to move back and forth. The cooperation of groove two and groove three makes the loading and unloading misaligned. And through the cooperation of fixed block and unloading roller conveyor, the automatic loading function of the device is realized.

[0021] 3. The present invention, through the inclined surface setting of the second groove, allows the bipolar plate tray to move horizontally backward by sliding the end of the fixed block and the guide slide, and through the opening of the first slide, it helps to improve the stability of the feeding of the device. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the upper side of the cabinet of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the constant temperature water bath of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the material conveying device of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the position conversion component of the present invention;

[0027] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 for Figure 5 Enlarged view of point B in the middle;

[0029] Figure 8 This is a three-dimensional structural diagram of the guide carriage of the present invention.

[0030] The components include: 1. Display screen; 2. Online conductivity meter; 3. Ion concentration monitor; 4. Electrolyte circulation filtration device; 5. Robotic arm; 6. Electrode conversion module; 7. Conveying device; 70. Vertical lifting mechanism for circulating chain; 71. Feeding roller conveyor; 72. Discharging roller conveyor; 73. Position conversion component; 730. Baffle; 731. Electric push rod; 732. Adsorption carriage; 7320. Support carriage; 7321. Electromagnet; 7322. Elastic element one; 7323. Slide rod one; 733. 734. Slide rail 1; 735. Guide slide; 736. Support block; 737. Push plate; 738. Elastic element 2; 739. Slide rod 2; 74. Bracket; 75. Roller conveyor frame; 8. Bipolar plate tray; 9. Main control terminal; 10. Electrode rod; 11. Peristaltic pump; 12. Constant temperature water bath; 13. Cabinet; 14. Current sensor; 15. Imaging module; 16. Ultrasonic transducer; 17. Guide plate; 18. Support plate 1; 19. Groove 1; 20. Groove 2; 21. Fixing block; 22. Groove 3. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 This invention provides an ultrasonic electrochemical surface modification device for bipolar plates, comprising a cabinet 13. A display screen 1, an online conductivity meter 2, an ion concentration monitor 3, an electrolyte circulation and filtration device 4, a robotic arm 5, an electrode conversion module 6, a central control terminal 9, a peristaltic pump 11, and a constant temperature water bath 12 are fixed to the upper side of the cabinet 13. One end of the online conductivity meter 2 and the ion concentration monitor 3 are both disposed inside the constant temperature water bath 12. The electrolyte circulation and filtration device 4 and the peristaltic pump 11... The output ends are all fixed inside the constant temperature water bath 12. The constant temperature water bath 12 is fixed with a current sensor 14, a shooting module 15 and two electrode rods 10. One end of each of the two electrode rods 10 is electrically connected to the electrode conversion module 6. Several ultrasonic transducers 16 are fixed on the inner wall of the constant temperature water bath 12. A material conveying device 7 is installed on one side of the cabinet 13. The material conveying device 7 includes a roller conveyor frame 75 fixed on the upper side of the constant temperature water bath 12. A bipolar plate tray 8 slides on the upper side of the roller conveyor frame 75.

[0033] In this embodiment, Figure 1The orientation is defined by the front, back, left, and right sides. The main control terminal 9 is electrically connected to the display screen 1, online conductivity meter 2, ion concentration monitor 3, electrolyte circulation filtration device 4, robotic arm 5, electrode conversion module 6, peristaltic pump 11, constant temperature water bath 12, and ultrasonic transducer 16. The main control terminal 9 can use a microprocessor, single-chip microcomputer, PLC programmable controller, or chip, etc. The online conductivity meter 2 can use a Mettler Toledo Seven Compact S230 conductivity meter detector; the ion concentration monitor 3 can use a Hach HQ440d monitor; the electrolyte circulation filtration device 4 can use a Millipore Express; the imaging module 15 can use a high-speed CMOS camera; the current sensor 14 can use a waterproof current sensor; and the electrode conversion module 6 can use an electrode conversion circuit or a PLC programmable controller for conversion. The device also includes associated components that work in conjunction with the ultrasonic transducer 16. There are fifteen ultrasonic transducers 16, five of which are located at the bottom of the electrolytic cell, and ten are evenly distributed around the outer walls of the electrolytic cell. All of the above are existing technologies.

[0034] Specifically, when using this device, the constant temperature water bath 12 itself forms a constant temperature electrolytic cell containing electrolyte. The bipolar plate tray 8 containing four bipolar plates is transported to the roller conveyor frame 75 by the material conveying device 7. Through the preset program of the main control terminal 9, the robotic arm 5 grabs the bipolar plates into the constant temperature water bath 12 and makes good contact with the electrode rod 10.

[0035] Next, the main control terminal 9 activates the ultrasonic transducer 16 to generate a strong cavitation effect, stripping the oxide film from the surface of the bipolar plate to prevent anodic passivation, accelerating the removal of dissolved products from the bipolar plate surface, preventing localized etching stagnation caused by product adhesion, enhancing electrolyte convection, ensuring fresh electrolyte uniformly contacts the bipolar plate, improving etching uniformity, and maintaining the electrolyte at a suitable temperature through a constant-temperature water bath 12 to maximize reaction efficiency. During this process, ordinary optical tracer particles are introduced via a peristaltic pump 11. The particles flow with the electrolyte, and the particle trajectories captured by the imaging module 15 determine whether electrolyte convection is sufficient. The device monitors the surface of the bipolar plate in real time, observes the condition of the oxide film glass and cavitation dynamics, judges whether the reaction is normal, and feeds the data back to the main control terminal 9 for processing and analysis, and displays it on the display screen 1. At the same time, the online conductivity meter 2 tracks the conductivity of the electrolyte in real time, the ion concentration monitor 3 monitors the ion concentration in real time, and the local current density is monitored by the current sensor 14, so as to feed the data back to the main control terminal 9 for processing and analysis, and display it on the display screen 1. This is used to adjust the power of the electrode rod 10 and the ultrasonic transducer 16 in real time. After a certain period of time, the etching is completed, thus realizing the etching reaction of the bipolar plate by the device.

[0036] Then, the main control terminal 9 controls the electrode switching module 6 to switch the electrodes of the electrode rod 10. The slight cavitation effect can disturb the electrolyte boundary layer on the cathode surface, reduce the concentration gradient of metal ions on the bipolar plate surface, and at the same time remove the tiny bubbles generated during the deposition process to prevent the bubbles from adhering and forming pinholes and pits in the coating. Simultaneously, the output parameters are adjusted, and the electrolyte circulation filter device 4 is quickly started to filter the byproducts generated during the above reaction process. The conductivity of the electrolyte in the constant temperature water bath 12 is calibrated by the ion concentration monitor 3. Then, the main control terminal 9 controls the ultrasonic transducer 16 to adjust to the preset power to match the power of the deposition reaction, assisting in the uniform distribution of ions. The constant temperature water bath 12 continues to maintain With the temperature stable, the current sensor 14 monitors for pinholes and impurities and feeds back to the main control terminal 9 for display on the screen 1. If any are found, the power of the electrolyte circulation filter device 4 is increased to enhance filtration. The current sensor 14 maintains a stable current density to prevent uneven coating thickness caused by current fluctuations. The ion concentration monitor 3 monitors and replenishes the consumed ions in real time to ensure a constant deposition rate until the deposition reaction is complete. The above devices are then shut down. At this point, the main control terminal 9 controls the robotic arm 5 to remove the bipolar plate and complete the unloading process. This solves the problem that the existing technology requires manual labor in the bipolar plate processing process, and the reaction process cannot be controlled or detected, resulting in large fluctuations in the product qualification rate.

[0037] Please see the appendix Figure 2 Below the roller conveyor frame 75, there is a feeding roller conveyor 71. On one side of the feeding roller conveyor 71, there is a circulating chain vertical lifting mechanism 70. At the output end of the circulating chain vertical lifting mechanism 70, there are several brackets 74 for placing the bipolar plate tray 8. The outer walls of the brackets 74 all pass through the feeding roller conveyor 71 and the roller conveyor frame 75.

[0038] Specifically, the bipolar plate tray 8 containing bipolar plates is placed sequentially on the feeding roller conveyor 71. The feeding roller conveyor 71 moves the bipolar plate tray 8 to the left side of the vertical lifting mechanism 70 of the circulating chain, that is, above the bracket 74. Driven by the vertical lifting mechanism 70 of the circulating chain, the bracket 74 passes through the upper side of the feeding roller conveyor 71 and lifts the bipolar plate tray 8, making a vertical elliptical motion. The bracket 74 passes through the upper side of the roller conveyor frame 75, and then moves the bipolar plate tray 8 onto the roller conveyor frame 75, completing the feeding process and thus improving the feeding efficiency of the device.

[0039] Based on the above embodiment, the vertical lifting mechanism 70 of the circulating chain drives the bracket 74 to move in a left elliptical motion, transporting the bipolar plate tray 8 to the roller conveyor frame 75. However, the roller conveyor frame 75 can only hold one bipolar plate tray 8 at a time, and the processed bipolar plates must be removed from the roller conveyor frame 75 before reloading can be performed, resulting in low loading efficiency. To solve the above problems, please refer to the appendix. Figure 5 and attached Figure 7 A position conversion component 73 is fixed on the upper side of the cabinet 13. The position conversion component 73 includes two baffles 730 fixed on the upper side of the cabinet 13. Fixing blocks 21 are fixed on both sides of the bipolar plate tray 8. A groove 20 is provided on the upper side of the opposite side of the two baffles 730 to cooperate with the fixing blocks 21 to slide horizontally.

[0040] Specifically, the roller conveyor 75 consists of a frame and an electric roller fixed to the outer wall of the frame. After the bracket 74 transports the bipolar plate tray 8 onto the roller conveyor 75, the roller conveyor 75 itself drives the bipolar plate tray 8 to move backward. Through the sliding connection between the fixing block 21 and the second groove 20, the bipolar plate tray 8 moves between the two baffles 730. In this embodiment, the second groove 20 can penetrate through the front and rear sides of the baffle 730. After the bipolar plate is processed, it is placed back onto the bipolar plate tray 8 by the robotic arm 5. At this time, the bipolar plate tray 8 can be pulled backward to complete the unloading, thus not affecting the loading action of the front roller conveyor 75, thereby improving the loading efficiency.

[0041] Based on the above embodiment, when the bipolar plate tray 8 is transported onto the roller conveyor frame 75 and the fixing block 21 slides into the second groove 20, vibration of the device may cause the position of the bipolar plate tray 8 to shift, preventing it from sliding into the second groove 20 and completing the loading. To solve the above problem, please refer to the appendix. Figure 5 A guide plate 17 is fixed on the side of the baffle 730 near the roller conveyor frame 75, and the two guide plates 17 are arranged with their opposite sides gradually moving away from each other.

[0042] Specifically, by setting the arc surfaces of the two guide plates 17 and gradually moving them from back to front, the fixed block 21 can be guided by the two guide plates 17 to center and correct the position of the bipolar plate tray 8 when it slides into the groove 20. This prevents the bipolar plate tray 8 from shifting and being unable to slide into the groove 20, thereby helping to improve the feeding efficiency of the device.

[0043] Based on the above embodiment, the bipolar plate tray 8 is moved between the two baffles 730 by the drive of the roller conveyor frame 75 itself. When the roller conveyor frame 75 and the bipolar plate tray 8 are no longer in contact, the bipolar plate tray 8 loses power and cannot continue to move backward in the groove 20, which will affect the feeding of the bipolar plate tray 8 on the front roller conveyor frame 75. To solve the above problem, please refer to the appendix. Figure 5 and attached Figure 6 An electric push rod 731 is fixed on the upper side of the cabinet 13. A push plate 736 is fixedly installed at the output end of the electric push rod 731. An adsorption slide 732 is installed on the upper side of the push plate 736. The adsorption slide 732 includes a support slide 7320 fixed on the upper side of the push plate 736. A slide rod 7323 is fixed on the inner wall of the support slide 7320. An electromagnet 7321 is slidably connected to the outer wall of the slide rod 7323. The outer wall of the electromagnet 7321 and the outer wall of the bipolar plate tray 8 are fixed by magnetic adsorption. An elastic element 7322 is fixed between the electromagnet 7321 and the support slide 7320.

[0044] Specifically, the elastic element 7322 can be a spring, elastic rope, or spring. In the initial state, the electromagnet 7321 is at the same horizontal height as the bipolar plate tray 8 on the roller conveyor frame 75 under the action of the elastic element 7322. This allows the electromagnet 7321 to move forward through the output of the electric push rod 731, magnetically adhering to the bipolar plate tray 8 on the roller conveyor frame 75. Then, the bipolar plate tray 8 is pulled backward, sliding into the groove 20, and moved to a distance that does not affect the continued feeding of the roller conveyor frame 75. This solves the problem that the bipolar plate tray 8 loses power and cannot move backward in the groove 20, which would affect the feeding of the bipolar plate tray 8 on the front roller conveyor frame 75.

[0045] Please see the appendix Figure 5 The two baffles 730 have a groove 32 on the opposite side of the mating fixing block 21, and the upper end of the groove 32 is connected to the groove 20.

[0046] Specifically, after the bipolar plate tray 8 is driven to move backward a certain distance by the electric push rod 731, it can also slide downward through the groove 22 to temporarily store multiple bipolar plate trays 8, thereby helping to improve the applicability of the device.

[0047] Please see the appendix Figure 5 The two baffles 730 have a groove 19 on one side opposite to the fixed block 21 for sliding. The lower end of the groove 22 is connected to the groove 19. The outer wall of the push plate 736 is in contact with the outer wall of the bipolar plate tray 8.

[0048] Specifically, in this embodiment, the second groove 20 does not penetrate the front and rear sides of the baffle 730. The rear end of the second groove 20 is connected to the upper end of the third groove 22, so that the bipolar plate tray 8 slides down into the first groove 19 through the third groove 22. When it is necessary to unload, the push plate 736 and the electromagnet 7321 are driven forward by the output end of the electric push rod 731. The push plate 736 pushes the bipolar plate tray 8 forward to the bracket 74. At this time, the electromagnet 7321 attracts the material conveying device 7 on the roller conveyor frame 75, thereby realizing the function of unloading and loading at the same time.

[0049] Based on the above embodiment, during the downward sliding of the bipolar plate tray 8 through the groove 22, its own gravity and inertia cause significant vibration when the bipolar plate tray 8 falls into the groove 19, affecting the bipolar plate. To solve the above problem, please refer to the appendix. Figure 4 and attached Figure 5 The outer wall of the groove 20 and the bipolar plate tray 8 is set with an inclined surface. A support plate 18 is fixed between the two baffles 730 and slidably connected to the lower side of the bipolar plate tray 8. The side of the support plate 18 away from the baffle 730 and the outer wall of the bracket 74 are preset with a gap.

[0050] Specifically, the inclined surface of the second groove 20 allows the bipolar plate tray 8 to be supported at the front and fixed at the rear by the electromagnet 7321 during its backward movement, and is also supported by the elastic element 7322, thus preventing the vibration caused by its rapid descent from affecting the bipolar plate. When unloading, the first tray 18 allows the bipolar plate tray 8 to be as close as possible to the bracket 74, preventing the bipolar plate tray 8 from falling and damaging the bipolar plate.

[0051] Based on the above embodiment, during the movement of the bipolar plate tray 8 along the inclined surface of the second groove 20 via the fixing block 21, the front and rear sides of the bipolar plate tray 8 will sway due to the elasticity of the first elastic element 7322. This causes the fixing block 21 to get stuck when it falls into the first groove 19. To solve the above problem, please refer to the appendix. Figure 5 and attached Figure 8 A support block 735 is fixed on the upper side of the baffle 730. A slide rod 738 is fixed between the inner top wall of the support block 735 and the inner bottom wall of the baffle 730. A guide slide 734 is slidably connected to the outer wall of the slide rod 738. Both sides of the guide slide 734 are slidably connected to the inner wall of the baffle 730. The side walls between the other two sides of the guide slide 734 are slidably connected to the two sides of the fixing block 21. A groove 733 is provided on the outer wall of the guide slide 734 to cooperate with the sliding of the fixing block 21. An elastic element 737 is fixed between the guide slide 734 and the support block 735.

[0052] Specifically, the second elastic element 737 can be a spring, elastic rope, or spring. When the bipolar plate tray 8 is about to enter the inclined position of the second groove 20, the end of the fixing block 21 away from the bipolar plate tray 8 slides between the upper and lower side walls of the guide slide 734. During the process of pulling the bipolar plate tray 8 backward by the electromagnet 7321, under the action of the weight of the bipolar plate tray 8 itself, the electromagnet 7321 overcomes the elastic potential energy of the first elastic element 7322, and the guide slide 734 overcomes the elastic potential energy of the second elastic element 737. As the bipolar plate tray 8 moves along the inclined surface of the second groove 20, the bipolar plate tray... The disk 8 remains horizontal. When it moves above the third groove 22, the sliding ends of the fixed block 21 and the guide slide 734 slide out of the guide slide 734 through the first groove 733 on the outer wall of the guide slide 734, and fall into the first groove 19 through the third groove 22, thus solving the problem of the fixed block 21 getting stuck. Then, through the contraction of the first elastic element 7322 and the second elastic element 737, the electromagnet 7321 and the guide slide 734 return to their original positions, which can realize the subsequent feeding function, thereby helping to improve the feeding efficiency of the device.

[0053] Please see the appendix Figure 1 and attached Figure 4 Below the roller conveyor frame 75, there is a feeding roller conveyor 72. The outer wall of the feeding roller conveyor 72 passes through one side of the cabinet 13, and the outer wall of the bracket 74 passes through the upper side of the feeding roller conveyor 72.

[0054] Specifically, after the bipolar plate tray 8 is received by the bracket 74, it continues to descend under the drive of the vertical lifting mechanism 70 of the circulating chain. When the bracket 74 passes over the upper side of the feeding roller conveyor 72, it leaves the bipolar plate tray 8 on the feeding roller conveyor 72. Driven by the feeding roller conveyor 72, the bipolar plate tray 8 is transported to the next process, thus realizing the automatic feeding function of the device.

[0055] Work process: When using this device, the feeding roller conveyor 71 is controlled by the main control terminal 9 to transport the bipolar plate tray 8 to the support 74. Driven by the vertical lifting mechanism 70 of the circulating chain, the bipolar plate tray 8 is transported to the roller conveyor frame 75. Driven by the output end of the electric push rod 731, the bipolar plate tray 8 is moved to the rear side, so that the end of the fixed block 21 slides into the guide slide 734. The feeding action of the device is completed by the setting of the inclined surface of the second groove 20 and the cooperation of the third groove 22 and the first groove 19.

[0056] Next, through the preset program of the main control terminal 9, the robotic arm 5 grabs the bipolar plate into the constant temperature water bath 12, starts the ultrasonic transducer 16 to generate a strong cavitation effect, and releases ordinary optical tracer particles through the peristaltic pump 11. The particle trajectory captured by the imaging module 15 and the cavitation dynamics of the bipolar plate surface are monitored and fed back to the main control terminal 9 for processing and analysis, and then displayed on the display screen 1. At the same time, the conductivity of the electrolyte is tracked by the online conductivity meter 2, the ion concentration is monitored by the ion concentration monitor 3, and the local current density is monitored by the current sensor 14. The data is fed back to the main control terminal 9 for processing and analysis, and is used to adjust the power of the electrode rod 10 and the ultrasonic transducer 16. With the cooperation of the electrode conversion module 6 and the electrolyte circulation filtration device 4, the etching and precipitation reaction of the bipolar plate is completed.

[0057] Then, the processed bipolar plates are moved to the bipolar plate tray 8 by the robotic arm 5. Driven by the electric push rod 731, the bipolar plate tray 8 is moved to the bracket 74 through the sliding connection of the fixing block 21 and the groove 19. With the cooperation of the circulating chain vertical lifting mechanism 70, the bipolar plate tray 8 is transported to the unloading roller conveyor 72 to complete the unloading, thus realizing the fully automatic operation function of the device.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic electrochemical surface modification device for bipolar plates, comprising a cabinet (13), characterized in that, The upper side of the cabinet (13) is fixed with a display screen (1), an online conductivity meter (2), an ion concentration monitor (3), an electrolyte circulation filter device (4), a robotic arm (5), an electrode conversion module (6), a main control terminal (9), a peristaltic pump (11), and a constant temperature water bath (12). One end of the online conductivity meter (2) and the ion concentration monitor (3) are both located inside the constant temperature water bath (12). The output ends of the electrolyte circulation filter device (4) and the peristaltic pump (11) are both fixed inside the constant temperature water bath (12). The interior of the warm water bath (12) is fixed with a current sensor (14), a shooting module (15) and two electrode rods (10). One end of each of the two electrode rods (10) is electrically connected to the electrode conversion module (6). Several ultrasonic transducers (16) are fixed on the inner wall of the constant temperature water bath (12). A material conveying device (7) is installed on one side of the cabinet (13). The material conveying device (7) includes a roller conveyor frame (75) fixed on the upper side of the constant temperature water bath (12). A bipolar plate tray (8) slides on the upper side of the roller conveyor frame (75).

2. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 1, characterized in that, A feeding roller conveyor (71) is provided below the roller conveyor frame (75). A circulating chain vertical lifting mechanism (70) is provided on one side of the feeding roller conveyor (71). Several brackets (74) for placing bipolar plate trays (8) are fixedly provided at the output end of the circulating chain vertical lifting mechanism (70). The outer walls of the brackets (74) all pass through the feeding roller conveyor (71) and the roller conveyor frame (75).

3. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 1, characterized in that, A position conversion component (73) is fixed on the upper side of the cabinet (13). The position conversion component (73) includes two baffles (730) fixed on the upper side of the cabinet (13). Fixing blocks (21) are fixed on both sides of the bipolar plate tray (8). A groove (20) is provided on the upper side of the opposite side of the two baffles (730) to cooperate with the horizontal sliding of the fixing block (21).

4. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 3, characterized in that, The baffle (730) is fixed with a guide plate (17) on the side near the roller conveyor frame (75), and the two guide plates (17) are arranged with their opposite sides gradually moving apart.

5. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 3, characterized in that, An electric push rod (731) is fixed on the upper side of the cabinet (13). A push plate (736) is fixedly installed at the output end of the electric push rod (731). An adsorption slide (732) is installed on the upper side of the push plate (736). The adsorption slide (732) includes a support slide (7320) fixed on the upper side of the push plate (736). A slide rod (7323) is fixed on the inner wall of the support slide (7320). An electromagnet (7321) is slidably connected to the outer wall of the slide rod (7323). The outer wall of the electromagnet (7321) and the outer wall of the bipolar plate tray (8) are fixed by magnetic adsorption. An elastic element (7322) is fixed between the electromagnet (7321) and the support slide (7320).

6. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 5, characterized in that, The two baffles (730) have a three-groove (22) for a mating fixing block (21) on one side, and the upper end of the three-groove (22) is connected to the two-groove (20).

7. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 6, characterized in that, The two baffles (730) have a groove (19) on one side opposite to the fixed block (21) for sliding. The lower end of the groove (22) is connected to the groove (19). The outer wall of the push plate (736) is in contact with the outer wall of the bipolar plate tray (8).

8. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 3, characterized in that, The outer wall of the groove 2 (20) and the bipolar plate tray (8) is inclined. A support plate 1 (18) is fixed between the two baffles (730) and slidably connected to the lower side of the bipolar plate tray (8). The side of the support plate 1 (18) away from the baffle (730) and the outer wall of the bracket (74) are pre-spaced.

9. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 3, characterized in that, A support block (735) is fixed on the upper side of the baffle (730). A slide rod (738) is fixed between the inner top wall of the support block (735) and the inner bottom wall of the baffle (730). A guide slide (734) is slidably connected to the outer wall of the slide rod (738). Both sides of the guide slide (734) are slidably connected to the inner wall of the baffle (730). The side walls between the other two sides of the guide slide (734) are slidably connected to both sides of the fixing block (21). A slide groove (733) is opened on the outer wall of the guide slide (734) to cooperate with the sliding of the fixing block (21). An elastic element (737) is fixed between the guide slide (734) and the support block (735).

10. The ultrasonic electrochemical surface modification device for bipolar plates according to claim 2, characterized in that, A discharge roller conveyor (72) is provided below the roller conveyor frame (75). The outer wall of the discharge roller conveyor (72) passes through one side of the cabinet (13), and the outer wall of the bracket (74) passes through the upper side of the discharge roller conveyor (72).

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