Screen printing equipment for facilitating positioning of solar cells

Abstract

The present invention relates to the technical field of solar cell manufacturing, and specifically to a screen printing device that facilitates the positioning of solar cell panels, including a frame, a printing assembly, and an adjustment table; a positioning assembly is provided on the adjustment table, the positioning assembly includes a guide mechanism and two first positioning units, the guide mechanism includes a guide member and a matching member, and the first positioning unit is driven to move by the vertical sliding of the printing assembly, without the need for additional power components, and the passive positioning of the cell panel can be achieved only by the movement of the printing assembly, thereby simplifying the equipment structure and reducing the manufacturing cost and maintenance difficulty. The cell panel is fixed by the first positioning unit, so that the cell panel remains stable during the printing process, avoiding the change in the contact position of the scraper, ink return knife and the screen plate caused by the movement of the screen plate in the traditional solution, thereby avoiding the influence of the printing tension fluctuation on the printing effect, and improving the accuracy and quality consistency of the screen printing of solar cell panels.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cell manufacturing, and in particular to a screen printing device that facilitates the positioning of solar cell sheets. Background Art

[0002] In the production process of solar cell modules, the manufacture of cells is the core link, and its quality directly affects the photovoltaic conversion efficiency of the module. The main production process of cells includes steps such as texturing, diffusion, wet etching, thin film deposition, electrode printing and sintering. Among them, the printing electrode process forms a conductive electrode on the surface of the cell through screen printing technology, which is a key link in determining the electrical performance of the cell. In actual production, when the cell is loaded onto the screen printing workbench through a transmission device, due to factors such as mechanical vibration and positioning error during the transmission process, it is easy to cause the cell to have an angle offset or position deviation on the workbench. However, traditional workbenches usually only have the function of transmitting the cell and lack the ability to correct the placement of the cell in real time. Therefore, it is necessary to rely on adjusting the angle platform and horizontal position of the screen printing screen to match the actual position of the cell and ensure the pattern accuracy of the printed electrode.

[0003] For example, Chinese patent authorization announcement number CN109774298B discloses a screen printing machine and a solar cell production system for printing electrodes of solar cell sheets. The screen printing machine includes a frame, a loading turntable, a printing module mechanism, a screen adjustment mechanism, a visual positioning mechanism, a detection mechanism, a transmission mechanism and a controller. This invention obtains the position deviation of the cell through the visual positioning mechanism, and then drives the screen adjustment mechanism to dynamically calibrate the angle and position of the screen to achieve precise alignment of the screen pattern and the cell. Although the alignment accuracy can be improved to a certain extent, in the process of screen printing electrodes, the consistency of the contact position between the screen and the scraper and ink return knife is a key factor in ensuring printing quality. The scraper needs to squeeze the slurry through the screen opening to the surface of the cell with uniform pressure, and the ink return knife needs to simultaneously push the slurry back along the screen surface to ensure that the slurry evenly covers the screen pattern area during the next printing. However, in this patent, when the angle or position of the battery cell on the workbench is offset due to transmission deviation, the screen adjustment mechanism needs to frequently adjust the angle and horizontal position of the screen to match the battery cell, which inevitably causes the preset contact position of the scraper, ink return knife and screen to change, thereby affecting the tension of the screen and the final printing accuracy. Summary of the Invention

[0004] To address the above-mentioned issues, a screen printing device is provided that facilitates the positioning of solar cells. This device utilizes the vertical sliding movement of a printing assembly to drive the movement of a first positioning unit, eliminating the need for additional power components. Passive positioning of the cell can be achieved solely through the movement of the printing assembly, simplifying the device structure and reducing manufacturing costs and maintenance. The first positioning unit secures the cell, keeping it stable during the printing process. This avoids the changes in contact position between the scraper, ink return blade, and the screen caused by the movement of the screen in traditional solutions, thereby preventing the impact of printing tension fluctuations on the printing effect and improving the precision and quality consistency of screen printing of solar cells.

[0005] In order to solve the problems of the prior art, the present invention provides a screen printing device that facilitates the positioning of solar cells, including a frame and a printing assembly arranged on the frame, the printing assembly can slide in the vertical direction of the frame, and an adjustment platform for carrying the solar cells to be printed is provided below the printing assembly; a positioning assembly is provided on the adjustment platform, the positioning assembly includes at least two first positioning units that can slide relative to each other in the horizontal direction, and the first positioning units can form a positioning space adapted to the size of the solar cells when they slide toward each other; a guide mechanism is also provided between the printing assembly and the positioning assembly, the guide mechanism includes a guide member provided on the printing assembly and a matching member provided on the first positioning unit, when the printing assembly slides downward in the vertical direction, the guide member cooperates with the matching member to drive the first positioning unit to slide in the horizontal direction to limit the solar cells.

[0006] Preferably, a second positioning unit perpendicular to the sliding direction of the first positioning unit is provided on the side of each of the two first positioning units, a driving plate is provided on the first positioning unit, an inclined groove is provided on the driving plate, and a sliding rod slidingly matched with the inclined groove is provided on the second positioning unit.

[0007] Preferably, a first sliding groove extending in a horizontal direction is provided on the adjustment platform, and the first positioning unit is slidably arranged in the first sliding groove; a rotatable baffle is provided on the first positioning unit.

[0008] Preferably, the first positioning unit is also provided with a slide rail extending along its sliding direction, the slide rail is provided with a slider, the slider is provided with a connecting rod hinged to it, the other end of the connecting rod is hinged to the middle of the baffle, and the end of the baffle close to the center of the adjustment platform is rotatably connected to the first positioning unit.

[0009] Preferably, a fixing assembly for adsorbing the battery cell is provided in the center of the adjustment platform, and the fixing assembly includes a plurality of adsorption holes arranged in a rectangular array and a control box provided inside the adjustment platform; the adsorption holes pass through the top surface of the adjustment platform and communicate with the control box.

[0010] Preferably, the adjustment platform is provided with a plurality of blowing holes arranged in a rectangular row, and the blowing holes are communicated with the control box.

[0011] Preferably, a partition is provided in the control box, which divides the control box into a negative pressure chamber and a driving chamber, and the negative pressure chamber and the driving chamber are respectively connected to the adsorption hole and the blowing hole.

[0012] Preferably, the guide member is an inclined guide column, the matching member is a mounting hole provided on the first positioning unit, and the inclined guide column is passed through the mounting hole and can slide along the hole wall.

[0013] Preferably, a sensor for detecting the position of the printing assembly is also provided on the printing assembly.

[0014] Preferably, the frame is provided with a screw extending in the vertical direction, and the printing component is sleeved on the screw and engaged with its thread; the frame is also provided with a limiting track extending in the vertical direction, and the printing component can be slidably set on the limiting track, and a first rotary drive motor is provided on the top of the screw for driving it to rotate.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This invention links the vertical sliding of the printing assembly with the horizontal sliding of the first positioning unit through a guide mechanism, eliminating the need for additional power components to drive the first positioning unit. Passive positioning of the solar cell can be achieved solely through the movement of the printing assembly, simplifying the equipment structure and reducing manufacturing costs and maintenance difficulties. Furthermore, the solution secures the solar cell through the first positioning unit, ensuring stability during the printing process. This avoids the changes in contact position between the scraper, ink return blade, and the screen caused by the movement of the screen in traditional solutions, thereby preventing the impact of printing tension fluctuations on the printing effect and improving the precision and quality consistency of screen printing of solar cells.

[0017] 2. This invention utilizes the mechanical linkage of an inclined slot and a sliding rod to convert the unidirectional motion of the first positioning unit into bidirectional, synchronized positioning along the X and Y axes. This eliminates the need for a separate drive component for the second positioning unit, and four-sided clamping is achieved solely through the vertical motion of the printing assembly. This simplifies the mechanical structure and control system of the device, reducing manufacturing and maintenance costs. Compared to traditional single-sided or single-sided linkage positioning methods, four-sided synchronized positioning applies limiting forces simultaneously from adjacent edges of the cell, effectively suppressing displacement, warping, or rotation during the printing process. This is particularly suitable for thin, fragile solar cells, improving positioning accuracy and stability.

[0018] 3. The present invention rotates the baffle to a vertical position, with its side surface contacting the edge of the cell to limit displacement. During printing, the baffle rotates to a horizontal position, flush with or slightly below the tabletop. This creates a safe gap between the upper surface of the baffle and the movement paths of the scraper and ink return blade, completely eliminating the risk of collision. This ensures positioning while avoiding interference with printing components, fundamentally resolving the structural flaws of fixed baffles. Furthermore, the baffle's rotation can be achieved through mechanical linkage or simple electronic drive, eliminating the need for complex sensors or control systems. This ensures high reliability and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a screen printing device that facilitates the positioning of solar cells.

[0020] Figure 2 A front view of a screen printing device that facilitates the positioning of solar cells.

[0021] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of a printing component in a screen printing device that facilitates the positioning of solar cells.

[0022] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of an adjustment table and solar cells in a screen printing device that facilitates the positioning of solar cells.

[0023] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of an adjustment table in a screen printing device for facilitating the positioning of solar cells.

[0024] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0025] Figure 7 yes Figure 5 Enlarged view of point B in the middle.

[0026] Figure 8 The present invention is a schematic diagram of the three-dimensional structure inside the adjustment table of a screen printing device that facilitates the positioning of solar cells.

[0027] Figure 9 The present invention is a schematic diagram of the three-dimensional structure of a positioning component in a screen printing device that facilitates the positioning of solar cells.

[0028] Figure 10 The present invention is a three-dimensional structural diagram of an adjustment table and a positioning component in a screen printing device for facilitating the positioning of solar cells.

[0029] Figure 11 yes Figure 10 Enlarged view of point C in the middle.

[0030] The numbers in the figure are:

[0031] 1. Frame; 11. Printing assembly; 111. Guide member; 1111. Inclined guide column; 12. Sensor; 13. Screw rod; 14. First rotary drive motor; 15. Limiting track; 2. Adjustment table; 21. Positioning assembly; 211. First positioning unit; 2111. Drive plate; 2112. Inclined groove; 2113. Baffle; 2114. Slide rail; 21141. Slider; 21142. Connecting rod; 212. Second positioning unit; 2121. Sliding rod; 22. Matching member; 221. Mounting hole; 23. First slide groove; 24. Fixing assembly; 241. Adsorption hole; 242. Control box; 243. Blowing hole; 244. Partition; 2441. Negative pressure chamber; 2442. Drive chamber; 3. Battery cell. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] like Figures 1 to 5 As shown: A screen printing device that facilitates the positioning of solar cells 3, including a frame 1 and a printing assembly 11 arranged on the frame 1, the printing assembly 11 can slide in the vertical direction of the frame 1, and an adjustment platform 2 for carrying the solar cells 3 to be printed is arranged below the printing assembly 11; a positioning assembly 21 is arranged on the adjustment platform 2, the positioning assembly 21 includes at least two first positioning units 211 that can slide relative to each other in the horizontal direction, and when the first positioning units 211 slide toward each other, a positioning space adapted to the size of the solar cell 3 can be formed; a guide mechanism is also provided between the printing assembly 11 and the positioning assembly 21, the guide mechanism includes a guide member 111 arranged on the printing assembly 11 and a matching member 22 arranged on the first positioning unit 211, when the printing assembly 11 slides downward in the vertical direction, the guide member 111 cooperates with the matching member 22 to drive the first positioning unit 211 to slide in the horizontal direction to limit the solar cell 3.

[0034] When printing is required on the battery cell 3, the battery cell 3 is placed on the adjustment table 2 by a robot or manually. At this time, the printing assembly 11 is in its initial position, and the first positioning unit 211 does not limit the battery cell 3. As the printing assembly 11 slides vertically downward along the frame 1, the guide member 111 provided on the printing assembly 11 and the matching member 22 on the first positioning unit 211 begin to cooperate. The guide mechanism converts the vertical movement of the printing assembly 11 into horizontal movement of the first positioning unit 211, allowing the two first positioning units 211 to slide toward each other in the horizontal direction until a positioning space that matches the size of the battery cell 3 is formed, thereby limiting and fixing the battery cell 3 through the first positioning unit 211. After printing is completed, the printing assembly 11 slides upward in the vertical direction to reset. The cooperation between the guide member 111 and the matching member 22 drives the first positioning unit 211 to slide horizontally away from each other, releasing the battery cell 3 for unloading.

[0035] By linking the vertical sliding of the printing assembly 11 with the horizontal sliding of the first positioning unit 211 through a guide mechanism, there is no need to set up additional power components to drive the first positioning unit 211. Passive positioning of the battery cell 3 can be achieved only by relying on the movement of the printing assembly 11, which simplifies the equipment structure and reduces manufacturing costs and maintenance difficulties.

[0036] Compared to traditional solutions that rely on conveyor belts, turntables, or visual positioning systems, this solution does not require complex visual recognition and dynamic calibration processes. The positioning space formed by the sliding of the first positioning unit 211 directly limits the position of the cell 3, avoiding positioning deviations caused by recognition errors or delays that may exist in the visual system, thereby improving positioning efficiency and reliability. At the same time, the solution fixes the cell 3 through the first positioning unit 211, so that the cell 3 remains stable during the printing process, avoiding the changes in the contact position of the scraper, ink return knife, and the screen caused by the movement of the screen in the traditional solution, thereby avoiding the impact of printing tension fluctuations on the printing effect, and improving the accuracy and quality consistency of the screen printing of the solar cell 3. In addition, the first positioning unit 211 can adjust the parameter ratio between the guide member 111 and the matching member 22, thereby forming a positioning space that adapts to cell 3 of different sizes by sliding toward each other, so that the equipment can adapt to cell 3 of various specifications, enhancing the versatility and flexibility of the equipment.

[0037] like Figures 1 to 5 、 Figures 8 to 10 As shown: a second positioning unit 212 perpendicular to the sliding direction of the first positioning unit 211 is provided on the side of the two first positioning units 211, a driving plate 2111 is provided on the first positioning unit 211, an inclined groove 2112 is provided on the driving plate 2111, and a sliding rod 2121 slidingly matched with the inclined groove 2112 is provided on the second positioning unit 212.

[0038] When the printing component 11 slides downward in the vertical direction, the two first positioning units 211 are driven to slide toward each other in the horizontal direction. Considering that the bilateral positioning method of the two first positioning units 211 has certain limitations, since the battery cell 3 is light, fragile and thin and has a smooth surface, when the clamping force is applied only from one side, the battery cell 3 is prone to lateral displacement or diagonal warping due to uneven force, resulting in a decrease in positioning accuracy; in addition, when the size of the battery cell 3 changes, the bilateral positioning cannot adaptively adjust the vertical limit, and an additional calibration mechanism needs to be added, resulting in a complex equipment structure and a long debugging time.

[0039] To this end, when the first positioning unit 211 moves, it drives the drive plate 2111, which is fixed to it, to move synchronously. Because the drive plate 2111 is provided with an inclined groove 2112, and the sliding rod 2121 of the second positioning unit 212 slides in conjunction with the inclined groove 2112, when the first positioning unit 211 moves along the X-axis, the inclined trajectory of the inclined groove 2112 forces the sliding rod 2121 to slide within the inclined groove 2112, converting the linear motion in the X-axis direction into two separate motions: the first being the sliding of the first positioning unit 211 along the X-axis, and the second being the sliding rod 2121 driving the second positioning unit 212 to slide synchronously in a direction perpendicular to the X-axis due to the inclination of the inclined groove 2112. Ultimately, the two first positioning units 211 and the two second positioning units 212 move synchronously in the X-axis and Y-axis directions, respectively, forming a four-sided clamping structure to achieve precise positioning of the battery cell 3.

[0040] Through the mechanical linkage of the inclined groove 2112 and the sliding rod 2121, the unidirectional movement of the first positioning unit 211 is converted into bidirectional synchronous positioning of the X and Y axes. There is no need to configure a separate driving component for the second positioning unit 212. The four-side clamping can be completed only by relying on the vertical movement of the printing component 11, which simplifies the mechanical structure and control system of the equipment and reduces manufacturing and maintenance costs.

[0041] Compared to traditional single-sided or single-sided linkage positioning methods, four-sided synchronous positioning can simultaneously apply limiting forces from adjacent edges of the cell 3, effectively suppressing the displacement, warping, or rotation of the cell 3 during the printing process. This is particularly suitable for thin and fragile solar cells 3, improving positioning accuracy and stability. In addition, the inclination angle and length of the inclined groove 2112 can be flexibly set according to the size of the cell 3, so that the sliding stroke of the first positioning unit 211 and the second positioning unit 212 form a fixed ratio, thereby adapting to cell 3 of different specifications and enhancing the versatility of the equipment. The mechanical linkage positioning method does not rely on electronic sensors or visual systems, avoiding signal delays or recognition errors. Its positioning accuracy depends only on the machining accuracy, further improving reliability and consistency.

[0042] like Figures 4 to 11As shown, a first sliding groove 23 extending in the horizontal direction is opened on the adjustment platform 2, and the first positioning unit 211 is slidably arranged in the first sliding groove 23; a rotatable baffle 2113 is provided on the first positioning unit 211.

[0043] During the screen printing process of the solar cell 3, if a fixed block or a limiting component that is always in the ejected state is used, although the positioning of the cell 3 can be achieved, there are hidden dangers in actual operation. During the printing operation, the scraper and the ink return knife need to reciprocate at high speed on the surface of the screen plate, and the gap between the screen plate and the cell 3 is extremely small. If the block is always kept in the ejected state, even a small installation error or equipment vibration may cause a rigid collision between the block and the scraper or the ink return knife. This collision will not only cause wear and deformation of the block itself, but may also cause problems such as chipping of the blade of the scraper or the ink return knife, tearing of the rubber strip, and even cause the screen plate to be damaged due to uneven force, which directly affects the printing quality.

[0044] This solution features a rotatable baffle 2113 on the first positioning unit 211. Baffle 2113 has two positions: a positioning state and a printing state. In the positioning state, baffle 2113 rotates to a vertical position, with its side surface contacting the edge of the cell 3 to limit its displacement. In the printing state, baffle 2113 rotates to a horizontal position, flush with or slightly below the tabletop. This creates a safe gap between the upper surface of baffle 2113 and the movement trajectory of the scraper and ink return blade, completely eliminating the risk of collision. While ensuring the positioning function, interference with the printing components is avoided, fundamentally resolving the structural flaws of fixed baffles. The rotation of baffle 2113 can be achieved through mechanical linkage or simple electronic control, eliminating the need for complex sensors or control systems, resulting in high reliability and low cost. Furthermore, this makes the device more adaptable to cell 3. When processing cell 3 of varying thicknesses or sizes, the height of baffle 2113 can be adjusted to ensure the limiting effect without replacing the entire positioning component, further enhancing the device's versatility and flexibility.

[0045] The slide groove provides a precise sliding guide for the first positioning unit 211, limits its movement direction, and avoids unstable clamping of the battery cell 3 due to lateral deviation during the positioning process; by setting the horizontal state of the baffle 2113 to be horizontal and flush with or slightly lower than the table surface, it can effectively compensate for the table surface wear or baffle 2113 wear that may occur after long-term operation of the equipment, ensuring that even in the case of component wear, the baffle 2113 can still be completely hidden under the table surface to maintain a reliable safety gap.

[0046] During the positioning process of the solar cell 3, the material selection of the baffle 2113 must take into account both the stable positioning and surface protection of the cell 3 to avoid damage to the edge of the cell 3 or positioning failure due to improper material. Taking into account the characteristics of the cell 3 being light, thin and fragile and easily scratched, the baffle 2113 is usually made of a flexible material with elastic buffering effect, such as polyurethane, silicone rubber or nitrile rubber. This type of material can evenly disperse the clamping force through slight deformation when in contact with the edge of the cell 3, reducing stress concentration and avoiding edge cracking or hidden cracks that may be caused by rigid contact; at the same time, its surface has a high friction coefficient, which can form stable static friction with the surface of the cell 3, effectively preventing the cell 3 from being displaced due to vibration or external pressure during the printing process.

[0047] like Figures 4 to 11 As shown: the first positioning unit 211 is also provided with a slide rail 2114 extending along its sliding direction, the slide rail 2114 is provided with a slider 21141, the slider 21141 is provided with a connecting rod 21142 hinged thereto, the other end of the connecting rod 21142 is hinged to the middle part of the baffle 2113, and the end of the baffle 2113 close to the center of the adjustment platform 2 is rotatably connected to the first positioning unit 211.

[0048] When positioning the battery cell 3 is required, the first positioning unit 211 is driven to slide horizontally, while the slider 21141, mounted on the first positioning unit 211, is driven to move synchronously along the slide rail 2114. Because the slider 21141 is hinged to the middle of the baffle 2113 via the connecting rod 21142, and the end of the baffle 2113 near the center of the adjustment platform 2 is hinged to the first positioning unit 211 to form a pivot point, the movement of the slider 21141 causes the connecting rod 21142 to tilt at a different angle, thereby pushing the baffle 2113 to tilt upward about the pivot point. As the first positioning unit 211 continues to slide, the baffle 2113 gradually transitions from a horizontal position (either flush with the top surface of the adjustment platform 2 or hidden underneath) to a vertical position, until the side of the baffle 2113 contacts the edge of the battery cell 3. The abutment of the limiting surfaces secures the battery cell 3 in the corresponding direction, completing the positioning process. When the printing operation is completed and the battery cell 3 needs to be released, the first positioning unit 211 slides in the opposite direction, and the slider 21141 also moves back synchronously along the slide rail 2114. The connecting rod 21142 pulls the baffle 2113 to flip downward, restoring it to a horizontal state to avoid interference with subsequent printing operations.

[0049] Through the articulated linkage mechanism of the slide rail 2114, slider 21141, and connecting rod 21142, the linear motion of the first positioning unit 211 is converted into the flipping motion of the baffle 2113. This eliminates the need for additional complex control circuitry and relies solely on the geometric relationship of the mechanical structure to achieve automatic switching of the baffle 2113 between the positioning state and the printing state, simplifying the device structure and reducing energy consumption. The slide rail 2114 provides a precise linear motion guide for the slider 21141, ensuring uniform force and a stable motion trajectory during the flipping of the baffle 2113. This prevents contact deviations at the edges of the battery cell 3 caused by shaking or offset, and improves the accuracy and consistency of the fit during positioning. The connecting rod 21142 is hinged to the middle of the baffle 2113 rather than the end, so that the center of force of the baffle 2113 and the fulcrum form a reasonable torque during the flipping process, reducing wear at the fulcrum and extending the service life of the component.

[0050] The first positioning unit 211 is preferably provided with two blocks, which are connected by a fixing frame. The fixing frame is elastically connected to the first positioning unit 211 through an elastic telescopic rod. At the same time, an electromagnet and a magnetic block are preferably provided between the fixing frame and the first unit. The fixing frame is driven by the electromagnetic force to move, thereby realizing the synchronous movement of the two blocks.

[0051] like Figures 3 to 6 and Figure 10 As shown: A fixing component 24 for adsorbing the battery cell 3 is provided in the center of the adjustment platform 2. The fixing component 24 includes a plurality of adsorption holes 241 arranged in a rectangular array and a control box 242 provided inside the adjustment platform 2; the adsorption holes 241 pass through the top surface of the adjustment platform 2 and are connected to the control box 242.

[0052] After the cell 3 is gripped from the edge by the first positioning unit 211 and initially secured in the center of the adjustment table 2, the control box 242 activates, creating a negative pressure environment below atmospheric pressure within the control box 242 through its internal negative pressure generating device. Because the suction holes 241 extend through the top surface of the adjustment table 2 and connect to the control box 242, the negative pressure within the control box 242 is transmitted through the suction holes 241 to the back of the cell 3. This creates a pressure differential between the suction holes 241 and the back of the cell 3, generating a suction force that firmly holds the cell 3 to the surface of the adjustment table 2. This suction force is evenly distributed across the back of the cell 3, effectively counteracting any external forces that may interfere with the cell 3 during the printing process, ensuring that the cell 3 maintains a stable position and posture throughout the printing process. When the printing process is complete, the control box 242 ceases providing negative pressure, and the pressure differential between the suction holes 241 and the back of the cell 3 disappears, releasing the suction force and allowing the cell 3 to be removed or transferred to the next step.

[0053] By cooperating with the adsorption holes 241 arranged in a rectangular array and the control box 242, a non-contact, uniform adsorption fixation of the battery cell 3 is achieved, avoiding edge damage or stress concentration that may be caused to the thin and fragile battery cell 3 by the traditional mechanical clamping method, and significantly improving the yield rate of the battery cell 3. The magnitude of the adsorption force can be flexibly adjusted by the negative pressure value in the control box 242, which can ensure sufficient adsorption stability without causing the battery cell 3 to deform or adhere to the table due to excessive adsorption force. The adsorption holes 241 arranged in a rectangular array evenly distribute the adsorption force on the back of the battery cell 3, effectively suppressing the warping of the battery cell 3 due to its own gravity or external pressure, further improving the fitting accuracy of the battery cell 3 and the screen during the printing process, and helping to improve the consistency and line quality of the printed pattern.

[0054] like Figures 3 to 6 and Figure 10 As shown, a plurality of blowing holes 243 arranged in a rectangular array are provided on the adjustment platform 2 , and the blowing holes 243 are communicated with the control box 242 .

[0055] When the first positioning unit 211 begins to limit the position of the battery cell 3, the control box 242 delivers air to the blowing holes 243 arranged in a rectangular array. After the air is ejected from the blowing holes 243, a uniform air film is formed between the battery cell 3 and the table surface of the adjustment table 2. Due to the existence of the air film, the contact surface between the battery cell 3 and the table surface is separated by gas. The sliding friction originally generated by direct contact is converted into shear force between gas molecules, and the friction is significantly reduced. At this time, when the first positioning unit 211 pushes the battery cell 3 to move, the battery cell 3 can slide lightly with the support of the air film until it is limited to the specified position; when the positioning is completed, the control box 242 stops supplying air to the blowing holes 243, the air film disappears, and the battery cell 3 resumes contact with the table surface. In combination with the negative pressure adsorption effect of the adsorption holes 241, it ensures that the battery cell 3 remains stable during the printing process.

[0056] The rectangular array of air holes 243, in conjunction with the control box 242, creates an air film to reduce friction during the positioning phase of the cell 3. This effectively addresses the issue of thin, fragile cells 3 being difficult to push smoothly by the positioning unit due to high friction with the table surface. In conventional non-air-blowing structures, the coefficient of friction between the cell 3 and the table surface is typically high, making it easy for uneven friction to cause edge damage or positional shifting during pushing. However, once the air film is formed, the friction coefficient is significantly reduced, enabling the positioning unit to precisely move the cell 3 with less driving force, avoiding hidden cracks or edge collapse caused by hard pushing. Furthermore, the rectangular array of air holes 243 ensures that the air film is evenly distributed beneath the cell 3, preventing warping or tilting of the cell 3 due to localized air pressure imbalances, further enhancing the smoothness of the positioning process. They also complement the suction holes 241, providing airflow during positioning to assist movement and suction during printing to secure the cell 3. This simplifies the device's control logic, enhances adaptability to cell 3 sizes, and reduces the risk of surface scratches caused by mechanical friction.

[0057] like Figures 3 to 6 and Figure 10 As shown: a partition 244 is provided in the control box 242, and the partition 244 divides the control box 242 into a negative pressure chamber 2441 and a driving chamber 2442. The negative pressure chamber 2441 and the driving chamber 2442 are respectively connected to the adsorption hole 241 and the blowing hole 243.

[0058] When the adjustment table 2 positions and fixes the battery cell 3, the partition 244 in the control box 242 separates the cavity into an independent negative pressure chamber 2441 and a drive chamber 2442, each of which performs different functions. During the positioning stage, the drive chamber 2442 is connected to the external air source, and an air flow is delivered to the blowing hole 243 through the internal channel, so that an air film is formed between the battery cell 3 and the table to reduce friction, making it easier for the first positioning unit 211 to drive the battery cell 3 to move to the limit position; when the positioning is completed, the negative pressure chamber 2441 activates the negative pressure generating device, and forms a negative pressure adsorption on the back of the battery cell 3 through the adsorption hole 241, firmly fixing it to the table. The presence of the partition 244 ensures that the air paths of the negative pressure chamber 2441 and the drive chamber 2442 are completely isolated, avoiding air pressure interference between the two during operation, thereby realizing function switching and collaborative work.

[0059] The control box 242 is separated into an independent negative pressure chamber 2441 and a drive chamber 2442 by a partition 244. This structurally ensures the independent operation of the adsorption and blowing functions, avoiding the air pressure instability that may be caused by traditional shared air circuits and significantly improving the reliability of both functions. The connection between the negative pressure chamber 2441 and the adsorption holes 241 enables uniform adsorption force on the back of the battery cell 3, while the connection between the drive chamber 2442 and the blowing holes 243 forms a stable air film under the battery cell 3. The two are physically separated by the partition 244, which not only simplifies the air circuit design, but also reduces the risk of air leakage, making equipment maintenance more convenient. The independent chambers separated by the partition 244 can accurately adjust the negative pressure value and the blowing pressure, respectively, to meet the differentiated requirements of different specifications of battery cells 3 for adsorption force and air film pressure. This further enhances the versatility and adaptability of the equipment, ensuring that the thin and fragile battery cells 3 can be smoothly moved and firmly fixed during the positioning and printing process, and guarantees the stability and yield of the overall process from the control end.

[0060] like Figures 1 to 4 and Figures 8 to 10 As shown, the guide member 111 is an inclined guide column 1111 , the matching member 22 is a mounting hole 221 provided on the first positioning unit 211 , and the inclined guide column 1111 is passed through the mounting hole 221 and can slide along the hole wall.

[0061] As the printing assembly 11 slides downward vertically, the inclined guide post 1111 affixed to the printing assembly 11 simultaneously moves downward. Because the inclined guide post 1111 is inserted into the mounting hole 221 of the first positioning unit 211 and has an inclined angle, the inclined surface of the guide post 1111 contacts the inner wall of the mounting hole 221, causing relative sliding. At this point, the vertical movement of the guide post 1111 is broken down into two components: sliding along the axis of the guide post 1111 and a horizontal thrust perpendicular to the axis. This horizontal thrust drives the first positioning unit 211 to slide horizontally toward each other until it clamps the battery cell 3. When the printing assembly 11 slides upward to reset, the inclined surface of the guide post 1111 pushes against the inner wall of the mounting hole 221, causing the first positioning unit 211 to slide horizontally away from each other, releasing the battery cell 3. This purely mechanical linkage requires no additional power; the automatic clamping and release of the positioning unit is achieved solely through the contact between the inclined surface of the guide post 1111 and the mounting hole 221.

[0062] The matching structure of the inclined guide column 1111 and the mounting hole 221 is simple and compact, with low processing cost. In addition, the friction pair is a metal contact surface during movement, which has good wear resistance and can withstand tens of thousands of reciprocating motions without obvious wear.

[0063] The guide member 111 and accessories can also be configured as a combination of a gear and rack, a ball screw and nut seat, a crank and connecting rod, and so on. For example, when the gear and rack are combined, the vertical movement of the printing assembly 11 is converted into horizontal sliding of the positioning unit through the meshing of the gear and rack; when the ball screw is combined with the nut seat, the vertical displacement is converted into horizontal linear motion of the nut seat by utilizing the lead screw's helix angle; when the crank and connecting rod are combined, the rotation of the crank drives the connecting rod to swing, thereby driving the positioning unit along the horizontal guide rail. These different mechanical transmission structures can all achieve the drive of the first positioning unit 211, and are not described in detail here.

[0064] like Figure 3 As shown, a sensor 12 for detecting the position of the printing assembly 11 is also provided on the printing assembly 11 .

[0065] As the printing assembly 11 moves vertically toward the adjustment table 2, a sensor 12 mounted on the printing assembly 11 monitors its position in real time. When the printing assembly 11 reaches the preset positioning trigger position, the sensor 12 sends an electrical signal to the back-end control circuit, which then activates the stopper of the positioning assembly 21. For example, this activates the stopper by rotating the baffle 2113 of the first positioning unit 211 from a horizontal position to a vertical position, or by sliding the first positioning unit 211 horizontally, with the side of the baffle 2113 abutting against the edge of the battery cell 3 to achieve position control. After the printing operation is completed, the sensor 12 detects that the printing assembly 11 has begun its vertical ascent and reset, and sends another signal to control the stopper to return to its initial position to prevent interference with subsequent movements of the printing assembly 11. This entire process, through real-time detection and signal triggering by the sensor 12, coordinates the movements of the positioning assembly 21 and the printing assembly 11, ensuring that the stopper executes its limiting or avoidance functions at the correct time.

[0066] The setting of sensor 12 enables closed-loop control of the block action of positioning component 21 and the movement of printing component 11, without relying on fixed stroke triggering of mechanical linkage, which significantly improves the automation and adaptability of the equipment. Compared with the traditional mechanical triggering method, the control of sensor 12 avoids the misoperation of the block due to equipment wear or installation errors, and is particularly suitable for battery cells 3 of different thicknesses or edge shapes. In addition, the non-contact detection of sensor 12 can avoid causing additional pressure or scratches on thin and fragile battery cells 3. Combined with the flexible material of the block, it further improves the integrity of the battery cell 3 during the positioning process and reduces the breakage rate of the battery cell 3.

[0067] like Figures 1 to 3As shown: a screw rod 13 extending in the vertical direction is provided on the frame 1, and the printing component 11 is sleeved on the screw rod 13 and engaged with its thread; a limiting rail 15 extending in the vertical direction is also provided on the frame 1, and the printing component 11 can be slidably set on the limiting rail 15, and a first rotary drive motor 14 for driving it to rotate is provided on the top of the screw rod 13.

[0068] When the first rotary drive motor 14 is started, the screw 13 drives the printing assembly 11 to slide downward along the limiting track 15 until the screen contacts the surface of the battery cell 3 to complete printing; when the first rotary drive motor 14 is reversed, the printing assembly 11 slides upward along the limiting track 15 to reset. The limiting track 15 forms a sliding fit with the printing assembly 11, limiting the printing assembly 11 to move only in the vertical direction, and preventing the radial force generated by the rotation of the screw 13 from causing the printing assembly 11 to tilt or rotate. During this process, the guide member 111 fixed to the printing assembly 11 moves synchronously with the printing assembly 11, and by contacting the matching member 22 of the first positioning unit 211, the vertical movement is converted into horizontal sliding of the positioning unit, thereby clamping or releasing the battery cell 3 and ensuring that the battery cell 3 is accurately positioned before printing.

[0069] The above embodiments merely represent one or more embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements 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 screen printing device for facilitating the positioning of solar cells, comprising a frame and a printing assembly disposed on the frame, wherein the printing assembly can slide in the vertical direction of the frame, and is characterized in that: An adjustment table for carrying the battery sheet to be printed is provided below the printing assembly; A positioning assembly is provided on the adjustment table, and the positioning assembly includes at least two first positioning units that can slide relative to each other in a horizontal direction. When the first positioning units slide toward each other, a positioning space that adapts to the size of the battery cell can be formed; A guide mechanism is also provided between the printing assembly and the positioning assembly. The guide mechanism includes a guide member provided on the printing assembly and a matching member provided on the first positioning unit. When the printing assembly slides downward in the vertical direction, the guide member cooperates with the matching member to drive the first positioning unit to slide in the horizontal direction to limit the position of the battery cell. A second positioning unit is provided on each side of the two first positioning units and is perpendicular to the sliding direction of the first positioning units. The first positioning units are provided with a driving plate, the driving plate is provided with an oblique groove, and the second positioning units are provided with a sliding rod that slides with the oblique groove; The adjustment platform is provided with a first sliding groove extending in a horizontal direction, and the first positioning unit is slidably arranged in the first sliding groove; the first positioning unit is provided with a rotatable baffle; The first positioning unit is further provided with a slide rail extending along its sliding direction, a slider is provided on the slide rail, and a connecting rod is provided on the slider to be hinged thereto, the other end of the connecting rod is hinged to the middle of the baffle, and the end of the baffle close to the center of the adjustment platform is rotatably connected to the first positioning unit; A fixing assembly for adsorbing the battery cells is provided in the center of the adjustment platform. The fixing assembly includes a plurality of adsorption holes arranged in a rectangular array and a control box provided inside the adjustment platform. The adsorption holes pass through the top surface of the adjustment platform and are connected to the control box. The guide piece is an oblique guide column, the matching piece is a mounting hole arranged on the first positioning unit, and the oblique guide column is passed through the mounting hole and can slide along the hole wall.

2. The screen printing device for facilitating solar cell positioning according to claim 1, characterized in that: The adjustment table is provided with a plurality of blowing holes arranged in a rectangular row, and the blowing holes are communicated with the control box.

3. The screen printing device for facilitating solar cell positioning according to claim 2, characterized in that: A partition is provided in the control box, which divides the control box into a negative pressure chamber and a driving chamber. The negative pressure chamber and the driving chamber are communicated with the adsorption hole and the blowing hole respectively.

4. The screen printing device for facilitating solar cell positioning according to claim 1, characterized in that: The printing assembly is further provided with a sensor for detecting the position of the printing assembly.

5. A screen printing device for facilitating positioning of solar cells according to any one of claims 1 to 4, characterized in that: The frame is provided with a screw rod extending in the vertical direction, and the printing component is sleeved on the screw rod and engaged with its thread; the frame is also provided with a limiting track extending in the vertical direction, and the printing component can be slidably set on the limiting track, and a first rotary drive motor is provided on the top of the screw rod for driving it to rotate.

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