Flexible string welding positioning device for multi-master grid solar cell production line

Abstract

This utility model relates to the field of solar cell processing technology, specifically a flexible string welding positioning device for multi-busbar solar cell production lines. It includes a mounting frame, a conveyor line, a string welding device, and a cylinder. It also includes a placement platform, a drive mechanism, a cam, a piston plate, a connecting mechanism, and a spur gear. The drive mechanism is connected to the placement platform, the cam is connected to the drive mechanism, the piston plate is connected to the placement platform, and the spur gear is connected to the connecting mechanism. When the conveyor line moves the solar cells on the placement platform towards the string welding device, the spur gear, through the connecting mechanism, drives the piston plate to move within the placement platform to generate negative pressure and adsorb the solar cells. After string welding is completed, the cylinder controls the string welding device to rise, and the drive mechanism controls the cam to reciprocate and strike the placement platform. The two piston plates move in opposite directions within the placement platform to generate negative pressure and adsorb the solar cells, thereby achieving the positioning of the solar cells and preventing damage to the solar cells due to external pressure.

Description

Technical Field

[0001] This utility model relates to the field of solar cell processing technology, specifically a flexible string welding positioning device for multi-busbar solar cell production lines. Background Technology

[0002] The photovoltaic industry is in a phase of rapid development. The vision of grid parity has driven continuous breakthroughs in the photoelectric conversion efficiency of solar cells, leading to a sustained decrease in the cost of solar photovoltaic modules and systems. Currently, photovoltaic modules are composed of strings of solar cells welded together by solder ribbons. These ribbons are primarily soldered onto silver grids printed on the surface of the cells. The photocurrent generated by the cells under sunlight is collected through the grid lines and solder ribbons and output as electricity. From the earliest cells with two grid lines to the current mainstream configuration of five grid lines, the upgrades in solar cell products over the years can be summarized in terms of changes in the number of grid lines.

[0003] During the string welding of solar cells, the positioning platform is used to position the solar cells along the X and Y axes. After positioning, the solar cells are transferred to the first-stage preheating platform for welding. The solar cells are directly heated from room temperature to the temperature of the first-stage preheating platform. If the temperature difference between the positioning platform and the first-stage preheating platform is too large, it can easily lead to microcracks and breakage of the solar cells (the lower the grade of the solar cells and the lower the temperature in the region, the more obvious the effect).

[0004] To address the aforementioned problems, existing technologies offer a solution. For example, patent publication number CN205888397U discloses a positioning platform for a solar cell string welding machine, including a solar cell placement platform. The solar cell placement platform is equipped with an X-axis positioning plate and a Y-axis positioning plate, and is also connected to an X-axis correction mechanism and a Y-axis correction mechanism. A heating element is installed within the solar cell placement platform, and the heating element is connected to a temperature control system. This invention, by installing a heating element in the solar cell placement platform, can heat the solar cells to the required temperature, reducing the temperature difference between the positioning platform and the first-stage preheating platform. This reduces the breakage rate of the solar cells during welding. Existing devices typically use top-down pressing to position the solar cells during string welding, which can easily lead to damage to the solar cells due to pressure, thereby reducing their quality.

[0005] To address this, a flexible string welding positioning device for multi-busbar solar cell production lines is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a flexible string welding positioning device for multi-busbar solar cell production lines, thereby solving the above-mentioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A flexible stringing positioning device for multi-busbar solar cell production lines includes a mounting frame, a conveyor line, a stringing device, and a cylinder. It also includes a placement platform, a drive mechanism, a cam, a piston plate, a connecting mechanism, and a spur gear. The placement platform is connected to the conveyor line, the drive mechanism is connected to the placement platform, the cam is connected to the drive mechanism, the piston plate is connected to the placement platform, the connecting mechanism is connected to the piston plate, and the spur gear is connected to the connecting mechanism. When the conveyor line moves the solar cells on the placement platform toward the stringing device, the spur gear, through the connecting mechanism, drives the piston plate to move within the placement platform to generate negative pressure to adsorb the solar cells. After stringing is completed, when the cylinder controls the stringing device to rise, the drive mechanism controls the cam to reciprocate and strike the placement platform.

[0008] Preferably, the driving mechanism includes a fixed seat, a guide rod, a guide block, a return spring, a support plate, a telescopic spring, a drive gear, a vertical rack, and a connecting rod. The fixed seat is fixedly connected to the conveyor line, the guide rod is fixedly connected to the fixed seat, the guide block is slidably mounted on the outer wall of the guide rod, the return spring is fixedly mounted between the fixed seat and the guide block, the support plate is fixedly mounted on one end of the guide block, the telescopic spring is fixedly mounted between the fixed seat and the support plate, the drive gear is fixedly mounted on the bottom end of the support plate, the vertical rack meshes with the drive gear, and the connecting rod is fixedly mounted on one end of the drive gear.

[0009] Preferably, the fixed base has a guide groove inside, and two guide grooves are symmetrically arranged with respect to the center line of the fixed base. The guide rod, guide block and reset spring are all installed in the guide groove.

[0010] Preferably, there are two sets of drive gears, the connecting rod is fixedly installed between the two sets of drive gears, the cam is fixedly installed on the outer wall of the connecting rod, and multiple cams are equidistantly arranged.

[0011] Preferably, the connecting mechanism includes a main rack, a secondary rack, and a lead screw. The main rack and the secondary rack both mesh with a spur gear. The lead screw is fixedly installed at one end of the spur gear, and the piston plate is threadedly connected to the lead screw.

[0012] Preferably, the main rack and the secondary rack are arranged symmetrically about the center point of one end of the mounting frame, the distance between the main rack and the secondary rack is greater than the diameter of the spur gear, and there are two sets of the main rack and the secondary rack arranged symmetrically about the center line of the mounting frame.

[0013] Preferably, the length values ​​of the main rack and the secondary rack are consistent with the length values ​​of the threaded grooves on the positive and negative lead screws.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: As the conveyor line drives the solar cells to move gradually toward the stringing device, it controls two piston plates to move in opposite directions within the placement platform to generate negative pressure. Under the action of negative pressure, the solar cells on the placement platform are adsorbed, thereby achieving the positioning of the solar cells and preventing them from being damaged by external pressure. After the stringing of solar cells is completed, the stringing device is controlled to separate from the solar cells. During the separation process, the cam is controlled to tap the support plate rapidly and intermittently to generate vibration. The vibration force is transmitted through the support plate and the placement platform to separate the stringing device from the solar cells and avoid the stringing device from the solar cells sticking together. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main sectional view of the mounting bracket of this utility model; Figure 3 This is a three-dimensional cross-sectional view of the placement platform of this utility model; Figure 4 This is a three-dimensional structural diagram of the placement platform and fixing base of this utility model; Figure 5 This is a front view cross-sectional structural diagram of the drive mechanism of this utility model.

[0016] In the diagram: 1. Mounting frame; 2. Conveyor line; 3. String welding device; 4. Cylinder; 5. Placement platform; 6. Drive mechanism; 61. Fixed seat; 62. Guide rod; 63. Guide block; 64. Return spring; 65. Support plate; 66. Telescopic spring; 67. Drive gear; 68. Vertical rack; 69. Connecting rod; 610. Guide groove; 7. Cam; 8. Piston plate; 9. Connecting mechanism; 91. Main rack; 92. Secondary rack; 93. Positive and negative lead screws; 10. Spur gear. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the embodiments described below are only some embodiments of the present utility model, and not all of them. If other embodiments are obtained by those skilled in the art without creative effort, they shall fall within the protection scope of the present utility model.

[0018] Reference Figures 1 to 5A flexible stringing positioning device for multi-busbar solar cell production lines includes a mounting frame 1, a conveyor line 2, a stringing device 3, and a cylinder 4. It also includes a placement platform 5, a drive mechanism 6, a cam 7, a piston plate 8, a connecting mechanism 9, and a spur gear 10. The placement platform 5 is connected to the conveyor line 2, the drive mechanism 6 is connected to the placement platform 5, the cam 7 is connected to the drive mechanism 6, the piston plate 8 is connected to the placement platform 5, the connecting mechanism 9 is connected to the piston plate 8, and the spur gear 10 is connected to the connecting mechanism 9. When the conveyor line 2 moves the solar cells on the placement platform 5 toward the stringing device 3, the spur gear 10 drives the piston plate 8 to move within the placement platform 5 through the connecting mechanism 9 to generate negative pressure to adsorb the solar cells. After stringing is completed, when the cylinder 4 controls the stringing device 3 to rise, the drive mechanism 6 controls the cam 7 to reciprocate and strike the placement platform 5.

[0019] As one embodiment of this utility model, refer to Figures 2 to 4 The drive mechanism 6 includes a fixed base 61, a guide rod 62, a guide block 63, a return spring 64, a support plate 65, a telescopic spring 66, a drive gear 67, a vertical rack 68, and a connecting rod 69. The fixed base 61 is fixedly connected to the conveyor line 2. The guide rod 62 is fixedly connected to the fixed base 61. The guide block 63 is slidably mounted on the outer wall of the guide rod 62. The return spring 64 is fixedly mounted between the fixed base 61 and the guide block 63. The support plate 65 is fixedly mounted at one end of the guide block 63. The telescopic spring 66 is fixedly mounted between the fixed base 61 and the support plate 65. The elastic coefficient of the telescopic spring 66 is greater than that of the return spring 64. This arrangement allows the telescopic spring 66 to withstand greater pressure and provide greater power for the lifting of the placement platform 5, enabling the placement platform 5 to rise quickly. The drive gear 67 is fixedly mounted at the bottom end of the support plate 65. The vertical rack 68 meshes with the drive gear 67. The connecting rod 69 is fixedly mounted... At one end of the drive gear 67, a guide groove 610 is provided inside the fixed base 61. The guide groove 610 provides space for the movement of the guide block 63 and the return spring 64. There are two guide grooves 610 symmetrically arranged along the center line of the fixed base 61. This arrangement can maintain the stability of both ends when the placement platform 5 is raised and lowered, and prevent the placement platform 5 from tilting during the raising and lowering process. The guide rod 62, guide block 63 and return spring 64 are all installed in the guide groove 610. There are two sets of drive gears 67. This arrangement can save effort for the cam 7 to rotate and strike the placement platform 5. The two sets of power sources can prevent the single drive gear 67 from being subjected to excessive force and can protect the drive gear 67. The connecting rod 69 is fixedly installed between the two sets of drive gears 67. The cam 7 is fixedly installed on the outer wall of the connecting rod 69. Multiple cams 7 are equidistantly arranged. This arrangement can make the bottom end of the placement platform 5 receive uniform impact, so that the placement platform 5 is subjected to uniform force.

[0020] As one embodiment of this utility model, refer to Figures 2 to 5 The connecting mechanism 9 includes a main rack 91, a secondary rack 92, and a forward and reverse lead screw 93. Both the main rack 91 and the secondary rack 92 mesh with the spur gear 10. The forward and reverse lead screw 93 is fixedly installed at one end of the spur gear 10. The piston plate 8 is threadedly connected to the forward and reverse lead screw 93. The main rack 91 and the secondary rack 92 are centrally symmetrically arranged with respect to the center point of one end of the mounting bracket 1. This arrangement allows for adjustment of the direction of rotation of the spur gear 10. The distance between the main rack 91 and the secondary rack 92 is greater than the diameter of the spur gear 10. This arrangement allows for a duration during which the solar cells can be serially welded. During this time, the piston plate 8 stops moving. It can provide preparation time for the spur gear 10 to turn, and can avoid motion resistance between the main rack 91, the secondary rack 92 and the spur gear 10. The main rack 91 and the secondary rack 92 are symmetrically arranged in two sets around the center line of the mounting frame 1. Through the above arrangement, the placement platform 5 can realize the transition from adsorption positioning to release of the solar cell. The length values ​​of the main rack 91 and the secondary rack 92 are consistent with the length values ​​of the thread groove on the positive and negative lead screw 93. Through the above arrangement, the horizontal distance of the placement platform 5 can be matched with the horizontal movement distance of the piston plate 8, so that the adsorption positioning of the solar cell can be realized just when the placement platform 5 stops moving.

[0021] Working principle: When in use, the user places the solar cells to be wired onto the placement platform 5, and then controls the conveyor line 2 to run. When the conveyor line 2 is running, it can drive the placement platform 5 to move towards the wired welding device 3 through the fixed base 61. When the spur gear 10 contacts the main rack 91, the spur gear 10 will rotate and drive the positive and negative screws 93 to rotate. When the positive and negative screws 93 rotate, they can drive the two piston plates 8 to move in opposite directions inside the placement platform 5. When the two piston plates 8 move, they can generate negative pressure inside the placement platform 5 to achieve adsorption and positioning of the solar cells. When the placement platform 5 moves the solar cell to below the stringing device 3, the spur gear 10 separates from the main rack 91, and then the cylinder 4 is activated. The cylinder 4 drives the stringing device 3 to descend to fit with the solar cell, and then the solar cell is stringed together by the stringing device 3. After the solar cell stringing is completed, the stringing device 3 is moved upward by the cylinder 4. When the stringing device 3 moves upward, the placement platform 5 rises synchronously with the stringing device 3 under the elastic action of the extension spring 66 and the return spring 64. This helps the guide block 63 slide on the guide rod 62 during the rise, and at the same time, it can drive the drive gear 67 to mesh with the vertical rack 68, thereby driving the connecting rod 69 to rotate. When the connecting rod 69 rotates, it can drive the cam 7 to rotate to achieve a knocking action on the bottom of the placement platform 5. Under the knocking action, the vibration force generated is transmitted through the placement platform 5 and the support plate 65 to achieve the separation of the stringing device 3 from the solar cell and prevent the stringing device 3 from sticking to the solar cell.

[0022] Although the embodiments of this utility model have been described in detail with reference to the accompanying drawings, those skilled in the art can make changes, modifications, substitutions and variations to these embodiments without departing from the principles and spirit of this utility model. The appended claims and their equivalents define the scope of this utility model.

Claims

1. A flexible string welding positioning device for multi-busbar solar cell production lines, comprising a mounting frame (1), a conveyor line (2), a string welding device (3), and a cylinder (4), characterized in that: It also includes a placement platform (5), a drive mechanism (6), a cam (7), a piston plate (8), a connecting mechanism (9), and a spur gear (10). The placement platform (5) is connected to the conveyor line (2), the drive mechanism (6) is connected to the placement platform (5), the cam (7) is connected to the drive mechanism (6), the piston plate (8) is connected to the placement platform (5), the connecting mechanism (9) is connected to the piston plate (8), and the spur gear (10) is connected to the connecting mechanism (9). When the conveyor line (2) drives the solar cells on the placement platform (5) to move towards the stringing device (3), the spur gear (10) drives the piston plate (8) to move within the placement platform (5) through the connecting mechanism (9) to generate negative pressure to adsorb the solar cells. After the stringing is completed, when the cylinder (4) controls the stringing device (3) to rise, the drive mechanism (6) controls the cam (7) to reciprocate to strike the placement platform (5).

2. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 1, characterized in that: The drive mechanism (6) includes a fixed seat (61), a guide rod (62), a guide block (63), a reset spring (64), a support plate (65), a telescopic spring (66), a drive gear (67), a vertical rack (68), and a connecting rod (69). The fixed seat (61) is fixedly connected to the conveyor line (2). The guide rod (62) is fixedly connected to the fixed seat (61). The guide block (63) is slidably installed on the outer wall of the guide rod (62). The reset spring (64) is fixedly installed between the fixed seat (61) and the guide block (63). The support plate (65) is fixedly installed at one end of the guide block (63). The telescopic spring (66) is fixedly installed between the fixed seat (61) and the support plate (65). The drive gear (67) is fixedly installed at the bottom end of the support plate (65). The vertical rack (68) meshes with the drive gear (67). The connecting rod (69) is fixedly installed at one end of the drive gear (67).

3. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 2, characterized in that: The fixed base (61) has a guide groove (610) inside. There are two guide grooves (610) symmetrically arranged with the center line of the fixed base (61). The guide rod (62), guide block (63) and reset spring (64) are all installed in the guide groove (610).

4. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 3, characterized in that: The drive gear (67) is provided in two sets, the connecting rod (69) is fixedly installed between the two sets of drive gears (67), the cam (7) is fixedly installed on the outer wall of the connecting rod (69), and multiple cams (7) are provided at equal intervals.

5. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 1, characterized in that: The connecting mechanism (9) includes a main rack (91), a secondary rack (92) and a forward and reverse screw (93). The main rack (91) and the secondary rack (92) are both meshed with a spur gear (10). The forward and reverse screw (93) is fixedly installed at one end of the spur gear (10). The piston plate (8) is threadedly connected to the forward and reverse screw (93).

6. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 5, characterized in that: The main rack (91) and the secondary rack (92) are arranged symmetrically about the center point of one end of the mounting frame (1). The distance between the main rack (91) and the secondary rack (92) is greater than the diameter of the spur gear (10). There are two sets of the main rack (91) and the secondary rack (92) symmetrically arranged about the center line of the mounting frame (1).

7. The flexible string welding positioning device for multi-busbar solar cell production lines according to claim 6, characterized in that: The length values ​​of the main rack (91) and the secondary rack (92) are consistent with the length values ​​of the threaded grooves on the positive and negative lead screws (93).

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