Solar cell silk-screen printing device

Abstract

The utility model discloses a solar cell silk-screen printing device which comprises a feeding station, a printing station and a discharging station which are sequentially arranged on a cell conveying path, the feeding station and the discharging station are respectively provided with a conveying unit, the printing station is provided with a printing unit, and the discharging station is provided with a discharging unit. The jacking moving unit can drive the battery pieces to move on the feeding station, the printing station and the discharging station, and the conveying unit is used for conveying the battery pieces in the transverse direction; the jacking moving unit is provided with a base, a fixed table top fixedly arranged on the base and moving table tops arranged on the base and located on the two sides of the fixed table top. According to the utility model, the size of the avoiding space can be changed through the relative movement between the movable table board and the fixed table board, so that the battery piece can be uniformly stressed in the printing process, the slurry printed on the battery piece is more uniform, and the printing effect of the battery piece is better.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic printing, specifically a screen printing device for solar cell wafers. Background Technology

[0002] In the manufacturing process of photovoltaic solar cells, solar cell screen printing equipment is used to transfer and print the cells. During screen printing, the cells need to be transferred from a conveying position to a printing position, and then conveyed backward after printing. In earlier application CN220904386U, the applicant protected a printing device for solar cells. This device has a receiving groove on a lifting conveying unit to accommodate a lateral conveying section. The lifting conveying unit drives the receiving groove relative to the lateral conveying section, thereby moving the solar cell to the corresponding position on the printing unit for printing. However, in actual printing, the presence of the receiving groove causes uneven stress on the solar cell during printing, resulting in inconsistent ink size at the receiving groove position compared to other positions after printing, leading to poor printing quality. Utility Model Content

[0003] In order to overcome the defects in the prior art, this utility model provides a screen printing apparatus for solar cells, which is used to solve one or more of the above-mentioned problems.

[0004] This application discloses a screen printing apparatus for solar cells, comprising a loading station, a printing station, and a unloading station arranged sequentially along a solar cell conveying path. Both the loading and unloading stations are equipped with a transmission unit, and the printing station is equipped with a printing unit. The apparatus also includes a lifting and moving unit capable of moving the solar cells between the loading, printing, and unloading stations. The transmission unit is used to convey the solar cells along a first transverse direction. The lifting and moving unit includes a base, a fixed platform disposed on the base, and movable platforms disposed on the base and located on both sides of the fixed platform. The base is movable relative to the transmission unit in the first transverse and longitudinal directions. A clearance space for accommodating the transmission unit is provided between the fixed platform and the movable platform. The height of the transmission unit is between the starting and ending points of the longitudinal direction of the clearance space. The movable platforms are movable relative to the fixed platform when the transmission unit is located outside the clearance space.

[0005] Furthermore, the lifting and moving unit also includes a table tooling unit, which has tooling fixing blocks connected to both ends of the base and table paper connected to both ends of the tooling fixing blocks respectively. The upper end of the tooling fixing blocks protrudes from the upper surfaces of the fixed table and the moving table, and the table paper abuts against the upper end of the tooling fixing blocks and corresponds to the fixed table and the moving table.

[0006] Furthermore, the printing unit has a doctor blade for printing paste downwards in the longitudinal direction, and the height difference between the upper end of the tooling fixing block and the upper surface of the fixed table or the movable table is less than 1 mm.

[0007] Furthermore, the lifting and moving unit is configured such that: during the process of the lifting and moving unit driving the battery cell on it from the loading station to the printing station, the moving table surface and the fixed table surface approach each other until they abut against each other; during the process of the lifting and moving unit driving the battery cell on it from the printing station to the unloading station, the moving table surface and the fixed table surface move away from each other to form the clearance space.

[0008] Furthermore, only the upper surface of the fixed platform has vacuum adsorption holes for adsorbing the platform paper and the battery cell, and a plurality of vacuum adsorption holes are arranged in an array.

[0009] Furthermore, the fixed platform has two movable platforms on both sides, and two clearance spaces are formed between the fixed platform and the two movable platforms. The two movable platforms move synchronously in opposite directions relative to the fixed platform in the second lateral direction.

[0010] Furthermore, the lifting and moving unit also includes a linear motor and an absolute encoder located between the base and the moving platform, wherein the mover and stator of the linear motor are respectively connected to the base and the moving platform, and the absolute encoder is used to sense the relative movement distance between the moving platform and the base.

[0011] Furthermore, a bearing is connected to the lower end of the fixed platform, and a rotating gear is connected to the outer periphery of the bearing. A rack that meshes with the rotating gear is connected to the lower end of each movable platform. The racks are parallel to each other. A connecting unit is connected to the side of the movable platform. The connecting unit is used to drive the movable platform connected to it to move relative to the fixed platform in the second transverse direction.

[0012] Furthermore, the lifting and moving unit has a first moving component arranged in the longitudinal direction and a second moving component arranged in the first transverse direction. The first moving component is used to drive the base to move relative to the transmission unit in the longitudinal direction, and the second moving component is used to drive the base to move relative to the transmission unit in the first transverse direction.

[0013] Furthermore, the side of the movable platform facing the fixed platform has an abutment surface that can fit against the side wall of the fixed platform.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By changing the relative movement between the movable table and the fixed table, the size of the clearance space can be altered. This allows the clearance space between the movable table and the fixed table to accommodate the transmission unit when the battery cell is transferred between the transmission unit and the lifting unit. When the lifting unit moves the battery cell to the printing station, the movable table abuts against the fixed table. Together, the movable table and the fixed table provide good support for the battery cell at the printing station, ensuring even force distribution during printing. This results in more uniform ink application on the battery cell, leading to a better printing effect.

[0016] 2. The tabletop paper supports the battery cell and prevents direct contact between the tabletop paper and the battery cell and the fixed tabletop and the movable tabletop, so as to avoid affecting the battery cell during the relative movement of the movable tabletop and the fixed tabletop, and improve the stability of the battery cell.

[0017] 3. The cooperation between the squeegee and the table paper allows the squeegee to press the battery cell onto the fixed table and the movable table within the elastic limit of the table paper, thereby ensuring that the table paper supports the battery cell while ensuring that the battery cell has good stability during the printing process.

[0018] 4. During the transfer of the battery cell between the lifting and moving unit and the transmission unit, the transmission unit can be accommodated by the clearance space. When the lifting unit moves the battery cell on it between the printing station and the loading station or the unloading station, the moving table moves relative to the fixed table to change the size of the clearance space, thereby saving the time of the moving unit during the movement process, making the movement rhythm of the lifting and moving unit more compact, and improving the transmission efficiency of the lifting and moving unit.

[0019] 5. During the process of the lifting and moving unit driving the battery cell to move and screen printing the battery cell, the fixed platform can adsorb the battery cell, while the moving platform can move relative to the fixed platform and the battery cell, thus avoiding the influence of the moving platform on the battery cell during the movement and improving the stability of the battery cell during the transfer process.

[0020] 6. The linear motor and the absolute encoder work together to enable relative movement between the fixed platform and the moving platforms on both sides, and achieve good movement accuracy.

[0021] 7. The rotation bearing and the rack work together to achieve the effect of the two moving platforms moving synchronously in opposite directions relative to the fixed platform. Combined with the connecting unit connected to one of the moving platforms, the connecting unit drives the two moving platforms to move synchronously, so that the fixed platform and the moving platforms on both sides can move relative to each other. In this process, the moving platforms are guaranteed to have good movement accuracy.

[0022] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the solar cell screen printing device in one view according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the solar cell screen printing device in this embodiment of the present invention from another perspective;

[0026] Figure 3 This is a schematic diagram of the lifting and moving unit in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the base in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the base in another embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram showing the positional relationship between the fixed platform and the movable platform in an embodiment of this utility model;

[0030] Figure 7 This is a schematic diagram showing the positional relationship between the tabletop paper, the fixed tabletop, and the movable tabletop in one viewpoint in an embodiment of this utility model;

[0031] Figure 8 This is a schematic diagram showing the positional relationship between the tabletop paper and the fixed and movable tabletops from another perspective in an embodiment of this utility model.

[0032] The reference numerals in the above figures are as follows: 1. Loading station; 2. Printing station; 3. Unloading station; 4. Transmission unit; 5. Printing unit; 51. Squeegee; 6. Lifting and moving unit; 61. Base; 611. Linear motor; 612. Absolute encoder; 613. Bearing; 614. Rotating gear; 615. Rack; 616. Connecting unit; 62. Fixed table; 621. Vacuum suction hole; 63. Moving table; 631. Abutment surface; 64. Clearance space; 65. Table tooling unit; 651. Tooling fixing block; 652. Table paper; 66. First moving component; 67. Second moving component; 7. Battery cell. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figures 1 to 8 As shown, a screen printing apparatus for solar cells in this embodiment includes a loading station 1, a printing station 2, and a unloading station 3 arranged sequentially on the conveying path of the solar cells 7. Both the loading station 1 and the unloading station 3 are equipped with a transmission unit 4. The transmission unit 4 at the loading station 1 is used to load the solar cells 7, and the transmission unit 4 at the unloading station 3 is used to unload the printed solar cells 7. The printing station 2 is equipped with a printing unit 5, which is used to screen print the solar cells 7 located at the printing station 2. The apparatus also includes a lifting and moving unit 6 capable of moving the solar cells 7 between the loading station 1, the printing station 2, and the unloading station 3.

[0035] The transmission unit 4 is used to transport the battery cell 7 along the first transverse direction. In this embodiment, the transmission unit 4 includes two conveyor belts that are spaced apart, so that the battery cell 7 moves synchronously with the transmission unit 4. Of course, in other optional embodiments, the structure of the transmission unit 4 can be adjusted according to actual needs.

[0036] The lifting and moving unit 6 includes a base 61, a fixed platform 62 disposed on the base 61, and movable platforms 63 disposed on the base 61 and located on both sides of the fixed platform 62. Preferably, the fixed platform 62 is fixedly disposed on the base 61, thereby making the fixed platform 62 more stable. The base 61 can move relative to the transmission unit 4 in a first lateral and longitudinal direction. In this embodiment, the first lateral direction is located in the horizontal plane, and the longitudinal direction is perpendicular to the horizontal plane. This allows the base 61 to drive the fixed platform 62 and the movable platform 63 to move simultaneously relative to the transmission unit 4. There is a clearance space 64 between the fixed platform 62 and the movable platform 63 for accommodating the transmission unit 4. The height of the transmission unit 4 is between the starting and ending heights of the longitudinal direction of the clearance space 64. This allows the transmission unit 4 to change its relative position with the clearance space 64 during the movement of the lifting and moving unit 6 relative to the transmission unit 4, thereby allowing the transmission unit 4 to be located inside or outside the clearance space 64. The movable platform 63 can move relative to the fixed platform 62 when the transmission unit 4 is outside the clearance space 64, so that the distance between the movable platform 63 and the fixed platform 62 changes, thereby causing the movable platform 63 to move away from or abut against the fixed platform 62. Understandably, the width of the clearance space 64 can be changed simultaneously during this process.

[0037] In this embodiment, the battery cell 7 is transferred to the loading station 1 by the transfer unit 4 and stops. Then, the lifting and moving unit 6 moves to the bottom of the transfer unit 4. Next, the lifting and moving unit 6 rises so that the transfer unit 4 gradually moves from the outside of the clearance space 64 to the inside of the clearance space 64, thereby transferring the battery cell 7 on the transfer unit 4 to the lifting and moving unit 6. After that, the lifting and moving unit 6 drives the battery cell 7 on it to move along the first lateral direction to the printing station 2, so that the transfer unit 4 gradually moves from the inside of the clearance space 64 to the outside of the clearance space 64. Then, the moving table 63 moves closer to the fixed table 62 so that the moving table 63 abuts against the fixed table 62. In this state, the printing unit 5 prints the battery cell 7 located on the printing station 2. It can be understood that in this state, the clearance space 64 disappears.

[0038] After the battery cell 7 is printed, the moving table 63 moves away from the fixed unit so that a clearance space 64 is gradually formed between the moving table 63 and the fixed table 62. During this process, the width of the clearance space 64 gradually increases to a preset width. Then, the lifting moving unit 6 moves the battery cell 7 on it along the first lateral direction to the unloading station 3 so that the transfer unit 4 located at the unloading station 3 extends into the clearance space 64. After that, the lifting moving unit 6 descends so that the battery cell 7 on it is transferred to the transfer unit 4 located at the unloading station 3, thus completing the printing and transfer of the battery cell 7.

[0039] With the above structure, the relative movement between the movable table 63 and the fixed table 62 can change the size of the clearance space 64. Thus, when the battery cell 7 is transferred between the transmission unit 4 and the lifting and moving unit 6, the clearance space 64 between the movable table 63 and the fixed table 62 is used to accommodate the transmission unit 4. When the lifting and moving unit 6 moves the battery cell 7 to the printing station 2, the movable table 63 abuts against the fixed table 62. The movable table 63 and the fixed table 62 together provide good support for the battery cell 7 located at the printing station 2, so that the battery cell 7 can be evenly stressed during the printing process, thereby making the ink printed on the battery cell 7 more uniform, and thus making the printing effect of the battery cell 7 better.

[0040] Specifically, the lifting and moving unit 6 also includes a platform fixture unit 65. The platform fixture unit 65 has fixture fixing blocks 651 connected to both ends of the base 61 and platform paper 652 connected to the fixture fixing blocks 651 at both ends. The upper end of the fixture fixing blocks 651 protrudes from the upper surfaces of the fixed platform 62 and the moving platform 63, so that there is a height difference between the platform paper 652 and the fixed platform 62 and the moving platform 63, thereby isolating the battery cell 7 placed on the platform paper 652 from the fixed platform 62 and the moving platform 63. Preferably, there can be multiple sheets of platform paper 652, so that the platform paper 652 has a better correspondence with the fixed platform 62 or the moving platform 63. A fixture fixing block 651 is used to mount the tabletop paper 652 on the base 61. The tabletop paper 652 abuts against the upper end of the fixture fixing block 651 and corresponds to the fixed tabletop 62 and the movable tabletop 63, so that each fixed tabletop 62 and each movable tabletop 63 has a corresponding tabletop paper 652. The upper end of the fixture fixing block 651 protrudes from the upper surface of the fixed tabletop 62 and the movable tabletop 63. Preferably, the upper end of the fixture fixing block 651 has a transition edge formed by a rounded chamfer, and the tabletop paper 652 is in close contact with the transition edge, thereby protecting and guiding the tabletop paper 652 through the transition edge. In an optional embodiment, a portion of a whole sheet of tabletop paper 652 corresponds to both the fixed tabletop 62 and the movable tabletop 63. In another optional embodiment, multiple sheets of tabletop paper 652 correspond to both the fixed tabletop 62 and the movable tabletop 63.

[0041] With the above structure, the tabletop paper 652 supports the battery cell 7 and avoids direct contact between the tabletop paper 652 and the battery cell 7 and the fixed tabletop 62 and the movable tabletop 63. This prevents the movable tabletop 63 from affecting the battery cell 7 during relative movement with the fixed tabletop 62 and improves the stability of the battery cell 7.

[0042] Specifically, the printing unit 5 has a doctor blade 51 for printing paste downwards in the longitudinal direction, and the height difference between the upper end of the tooling fixing block 651 and the upper surface of the fixed table 62 or the movable table 63 is less than 1mm, that is, the upper end of the tooling fixing block 651 can be within 1mm higher than or equal to the upper surface of the fixed table 62 or the movable table 63.

[0043] In this embodiment, when the lifting and moving unit 6 moves the battery cell 7 to the printing station 2, the squeegee 51 prints paste downwards in the longitudinal direction, thereby pressing the table paper 652 and the battery cell 7 on it into contact with the fixed table 62 and the moving table 63, and screen printing is performed on the battery cell 7 in this state. Within the aforementioned height difference range, the cooperation between the squeegee 51 and the table paper 652 ensures that, within the elastic limit of the table paper 652, the squeegee 51 presses the battery cell 7 onto the fixed table 62 and the moving table 63, thereby ensuring the supporting effect of the table paper 652 on the battery cell 7 while ensuring good stability of the battery cell 7 during the printing process.

[0044] Specifically, the lifting and moving unit 6 is configured as follows:

[0045] During the process of the lifting and moving unit 6 moving the battery cell 7 on it from the loading station 1 to the printing station 2, the moving table 63 and the fixed table 62 approach each other until they come into contact. As a result, during the movement of the lifting and moving unit 6 from the loading station 1 to the printing station 2, the clearance space 64 gradually moves away from the transmission unit 4. After the transmission unit 4 is outside the clearance space 64, the moving table 63 approaches the fixed table 62 to reduce the clearance space 64 until the moving table 63 comes into contact with the fixed table 62.

[0046] During the process of the lifting and moving unit 6 moving the battery cell 7 from the printing station 2 to the unloading station 3, the moving table 63 and the fixed table 62 move away from each other to form a clearance space 64. As the lifting and moving unit 6 moves from the printing station 2 to the unloading station 3, the moving table 63 moves away from the fixed table 62 to form and increase the clearance space 64 until the moving table 63 and the fixed table 62 reach a preset width, which is greater than the width of the transmission unit 4. This allows the transmission unit 4 located at the unloading station 3 to extend into the clearance space 64 when the lifting and moving unit 6 moves the battery cell 7 to the unloading station 3. Then, after the lifting and moving unit 6 descends, the battery cell 7 is transferred from the lifting and moving unit 6 to the transmission unit 4 and then conveyed by the transmission unit 4 to the subsequent station.

[0047] With the above structure, the battery cell 7 can be transferred between the lifting and moving unit 6 and the transmission unit 4. The transmission unit 4 can be accommodated by the clearance space 64. When the lifting unit moves the battery cell 7 on it between the printing station 2 and the loading station 1 or unloading station 3, the moving table 63 moves relative to the fixed table 62 to change the size of the clearance space 64. This saves time for the moving unit during the movement process, makes the movement rhythm of the lifting and moving unit 6 more compact, and improves the transmission efficiency of the lifting and moving unit 6.

[0048] Specifically, only the upper surface of the fixed platform 62 has vacuum adsorption holes 621 for adsorbing the platform paper 652 and the battery cell 7. Multiple vacuum adsorption holes 621 are arranged in an array. It can be understood that in this embodiment, the movable platform 63 does not have vacuum adsorption holes 621, so that the fixed platform 62 adsorbs the platform paper 652 and the battery cell 7 through the vacuum adsorption holes 621 thereon, while the movable platform 63 can move relative to the fixed platform 62 and the battery cell 7 while the fixed platform 62 is adsorbing the platform paper 652 and the battery cell 7. It is worth noting that the platform paper 652 has micro-holes so that the vacuum adsorption holes 621 can simultaneously adsorb the platform paper 652 and the battery cell 7 thereon. With the above structure, during the process of lifting and moving unit 6 driving the battery cell 7 to move and screen printing the battery cell 7, the fixed platform 62 can adsorb the battery cell 7, while the moving platform 63 can move relative to the fixed platform 62 and the battery cell 7, avoiding the influence of the moving platform 63 on the battery cell 7 during the movement and improving the stability of the battery cell 7 during the transfer process.

[0049] Specifically, the fixed platform 62 has two movable platforms 63 on both sides, and two clearance spaces 64 are formed between the fixed platform 62 and the two movable platforms 63. That is, in this embodiment, when the battery cell 7 is located on the lifting and moving unit 6, it is supported by the fixed platform 62 and the movable platforms 63 on both sides. The two clearance spaces 64 are respectively located between the fixed platform 62 and the two movable platforms 63. Correspondingly, the battery cell 7 is simultaneously conveyed backward by two conveyor belts, thereby giving the battery cell 7 good stability during the conveying process. The two movable platforms 63 move synchronously in opposite directions relative to the fixed platform 62 in a second transverse direction. In this embodiment, the second transverse direction is located in the horizontal plane and is perpendicular to the first transverse direction. This allows the two movable platforms 63 to maintain the same distance from the fixed platform 62 during the movement of the movable platforms 63 relative to the fixed platform 62, thereby enabling the two movable platforms 63 to move synchronously relative to the fixed platform 62. Preferably, a sliding track is provided between the movable platform 63 and the base 61, so that the movable platform 63 and the base 61 can move relative to each other under the action of the sliding track, thereby giving the movable platform 63 a good sliding effect with the fixed surface. With the above structure, the cooperation of the transmission unit 4 and the lifting and moving unit 6 makes the battery cell 7 have good stability during transportation and processing.

[0050] Specifically, the system includes a linear motor 611 and an absolute encoder 612 located between the base 61 and the movable platform 63. The mover and stator of the linear motor 611 are connected to the base 61 and the movable platform 63, respectively. In this embodiment, the mover and stator are a coil and a permanent magnet, respectively. By changing the magnitude and direction of the current in the coil, the linear motor 611 drives the two movable platforms 63 to move synchronously relative to the fixed platform 62, thereby achieving a relative movement effect between the movable platform 63 and the fixed platform 62. The absolute encoder 612 is located on the base 61 and correspondingly positioned to ensure the accurate positioning of the movable platform 63 relative to the base 61.

[0051] In this embodiment, after the battery cell 7 is transferred from the transmission unit 4 located at the loading station 1 to the lifting and moving unit 6, the coil is energized so that the permanent magnet and the coil move relative to each other, so that the moving table 63 and the fixed table 62 move relative to each other. During this process, the absolute encoder 612 ensures that the moving table 63 moves accurately relative to the base 61, so as to ensure that the two moving tables 63 abut against the fixed table 62, and then the battery cell 7 is printed.

[0052] After the battery cell 7 is printed, the moving table 63 moves relative to the fixed unit under the combined action of the coil and the permanent magnet so that the moving table 63 moves away from the fixed table 62 to form a clearance space 64. Then the lifting moving unit 6 moves laterally so that another transfer unit 4 extends into the clearance space 64. After that, the lifting moving unit 6 descends so that the battery cell 7 on it is transferred to the transfer unit 4 located at the unloading station 3, thus completing the printing and transfer of the battery cell 7.

[0053] With the above structure, the linear motor 611 and the absolute encoder 612 work together to enable relative movement between the fixed platform 62 and the moving platforms 63 on both sides, and achieve good movement accuracy.

[0054] Specifically, a bearing 613 is connected to the lower end of the fixed platform 62, and a rotating gear 614 is connected to the outer periphery of the bearing 613. Each movable platform 63 has a rack 615 connected to its lower end, meshing with the rotating gear 614. The racks 615 are parallel to each other. In this embodiment, two racks 615 are located on the movable platforms 63 on both sides of the fixed platform 62. The engagement of the racks 615 and the rotating gear 614 allows the two movable platforms 63 to move synchronously during the rotation of the bearing 613. A connecting unit 616 is connected to the side of each movable platform 63. The connecting unit 616 drives the movable platform 63 connected to it to move relative to the fixed platform 62 in a second lateral direction. Thus, through the connection of the connecting unit 616 to one of the movable platforms 63, the two movable platforms 63 can move synchronously in opposite directions relative to the fixed platform 62 during the movement of the connecting unit 616.

[0055] In this embodiment, after the battery cell 7 is transferred from the transfer unit 4 located at the loading station 1 to the lifting and moving unit 6, the connecting unit 616 drives the moving table 63 connected to it to move towards the fixed table 62. Then, through the cooperation between the rack 615 and the rotating gear 614, the two moving tables 63 achieve the effect of synchronously approaching each other in opposite directions, so as to ensure that both moving tables 63 abut against the fixed table 62, and then the battery cell 7 is printed.

[0056] After the battery cell 7 is printed, the connecting unit 616 drives the movable table 63 connected to it away from the fixed table 62. Then, through the cooperation between the rack 615 and the rotating gear 614, the two movable tables 63 achieve the effect of moving away synchronously in opposite directions to form a clearance space 64. Then, the lifting moving unit 6 moves laterally so that the transfer unit 4 located at the unloading station 3 extends into the clearance space 64. After that, the lifting moving unit 6 descends so that the battery cell 7 on it is transferred to the transfer unit 4 located at the unloading station 3, completing the printing and transfer of the battery cell 7.

[0057] With the above structure, the two moving platforms 63 move synchronously in opposite directions relative to the fixed platform 62 through the cooperation of the rotating bearing 613 and the rack 615. Combined with the connecting unit 616 connected to one of the moving platforms 63, the connecting unit 616 drives the two moving platforms 63 to move synchronously, so that the fixed platform 62 and the moving platforms 63 on both sides can move relative to each other, and in this process, the moving platforms 63 can be guaranteed to have good movement accuracy.

[0058] Preferably, the connecting unit 616 includes a connecting block and a connecting rod that are connected to each other. The connecting block is connected to the moving platform 63, and the end of the connecting rod away from the connecting block is located outside the moving platform 63 and connected to the rotating part. In this embodiment, the rotating part is a rotary servo motor. Of course, in other optional embodiments, the structure of the rotating part can be adjusted according to actual needs.

[0059] Specifically, the lifting and moving unit 6 has a first moving component 66 arranged longitudinally and a second moving component 67 arranged transversely. The first moving component 66 is used to drive the base 61 to move relative to the transmission unit 4 in the longitudinal direction. The first moving component 66 may include a first slide rail arranged longitudinally and a first moving part slidably connected to the first slide rail, and the first moving part is connected to the base. The second moving component 67 is used to drive the base 61 to move relative to the transmission unit 4 in the first transverse direction. The second moving component 67 may include a second slide rail arranged transversely and a second moving part slidably connected to the second slide rail, and the second moving part is connected to the base 61. With the above structure, the first moving component 66 and the second moving component 67 drive the base 61 to move in the longitudinal and first transverse directions, thereby enabling the lifting and moving unit 6 to drive the battery cell 7 to move in the longitudinal and first transverse directions, so as to achieve the effect of transferring the battery cell 7 with the lifting and moving unit 6 between the loading station 1, the printing station 2 and the unloading station 3.

[0060] Specifically, the side of the movable platform 63 adjacent to the fixed platform 62 has an abutment surface 631 that can fit against the side wall of the fixed platform 62, so that after the movable platform 63 abuts against the fixed platform 62, the movable platform 63 and the fixed platform 62 are completely fitted together, thereby enabling the movable platform 63 and the fixed platform 62 to provide good support for the battery cell 7 at the same time, and improving the screen printing efficiency of the battery.

[0061] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A screen printing apparatus for solar cells, characterized in that, The application relates to a battery piece conveying device, which comprises a feeding station, a printing station and a discharging station arranged in sequence on a battery piece conveying path, wherein the feeding station and the discharging station are provided with conveying units, the printing station is provided with a printing unit, and a jacking moving unit is arranged to drive the battery piece to move between the feeding station, the printing station and the discharging station. The conveying unit is used to convey the battery piece in a first lateral direction. The jacking moving unit comprises a base, a fixed table arranged on the base and a moving table arranged on the base and located on both sides of the fixed table, the base can move in a first lateral direction and a longitudinal direction relative to the conveying unit, the fixed table and the moving table have an avoiding space for accommodating the conveying unit, the height of the conveying unit is between the starting point and the terminal point of the avoiding space in the longitudinal direction, and the moving table can move relative to the fixed table when the conveying unit is located outside the avoiding space.

2. The solar cell screen printing apparatus according to claim 1, wherein The jacking moving unit further comprises a table tool unit, the table tool unit has a tool fixed block connected with both ends of the base and a table paper connected with both ends of the tool fixed block, the upper end of the tool fixed block protrudes from the upper surfaces of the fixed table and the moving table, and the table paper abuts against the upper end of the tool fixed block and corresponds to the fixed table and the moving table.

3. The solar cell screen printing apparatus according to claim 2, wherein The printing unit has a doctor blade for printing slurry downward in the longitudinal direction, and the height difference between the upper end of the tool fixed block and the upper surface of the fixed table or the moving table is less than 1 mm.

4. The solar cell screen printing apparatus according to claim 1, wherein The jacking moving unit is configured to: During the movement of the jacking moving unit and the battery piece thereon from the feeding station to the printing station, the moving table approaches the fixed table until they abut against each other; During the movement of the jacking moving unit and the battery piece thereon from the printing station to the discharging station, the moving table and the fixed table move away from each other to form the avoiding space.

5. The solar cell screen printing apparatus according to claim 2, wherein Only the upper surface of the fixed table has vacuum suction holes for adsorbing the table paper and the battery piece, and a plurality of the vacuum suction holes are arranged in an array.

6. The solar cell screen printing apparatus according to claim 1, wherein The two sides of the fixed table have two moving tables, two avoiding spaces are formed between the fixed table and the two moving tables, and the two moving tables move in the second lateral direction relative to the fixed table in opposite directions synchronously.

7. The solar cell screen printing apparatus according to claim 6, wherein The jacking moving unit further comprises a linear motor and an absolute value encoder located between the base and the moving table, wherein the mover and the stator of the linear motor are connected with the base and the moving table respectively, and the absolute value encoder is used to sense the relative movement distance between the moving table and the base.

8. The solar cell screen printing apparatus according to claim 6, wherein The lower end of the fixed table is connected with a bearing, the outer periphery of the bearing is connected with a rotating gear, the lower end of each moving table is connected with a rack engaged with the rotating gear, the racks are parallel to each other, and the side of the moving table is connected with a connecting unit used to drive the moving table connected therewith to move relative to the fixed table in the second lateral direction.

9. The solar cell screen printing apparatus according to claim 1, wherein The lifting moving unit has a first moving assembly arranged along a longitudinal direction and a second moving assembly arranged along a first transverse direction, the first moving assembly being configured to drive the base to move relative to the conveying unit in the longitudinal direction, and the second moving assembly being configured to drive the base to move relative to the conveying unit in the first transverse direction.

10. The apparatus according to claim 1, wherein The side of the mobile table adjacent to the fixed table has an abutting surface capable of abutting against the side wall of the fixed table.

Images