Solar cell test equipment

Abstract

The embodiment of the invention provides solar cell testing equipment, and relates to the field of photovoltaic equipment detection. Comprising a base, a correction mechanism, a support, a lead screw, a first motor, a conveying mechanism, an inspection platform and a detector. The bracket is mounted on the upper surface of the base; the lead screw is rotationally mounted in the bracket; the first motor is installed on the support, and the output end of the first motor is connected with one end of the lead screw. And the conveying mechanism is mounted on the lead screw. Whether the position is accurate or not can be accurately judged, and the angle of the cell panel can be automatically calibrated; the position of the vacuum suction cup can be automatically adjusted, it is ensured that stress is uniform and stable when the cell panel is sucked and transferred, and the process is automatically adjusted without manual work; in addition, the detector can be prevented from shielding the path of the driving seat, the detector is also automatically reset after the driving seat is reset, accurate control is achieved through a mechanical structure, and detection is not affected.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic equipment detection, and specifically refers to a solar cell testing device. Background Art

[0002] After the solar cells are prepared through steps such as printing and drying, a solar cell testing device is required to measure the current-voltage (IV) characteristic curves of the cells under different illumination and temperature conditions through IV detection, so as to evaluate key parameters such as the conversion efficiency and power output of the cells. Additionally, EL (Electro Luminescence) testing is also carried out to detect abnormal phenomena such as hidden cracks, fragments, false soldering, and broken grids in the solar cells.

[0003] A solar cell testing device and method with the publication number of CN118611588A, including a substrate, fixing columns, testing channels, a conveying structure, etc. When testing the cells, multiple testing channels are arranged along the periphery of the fixing columns. With the cooperation of an image acquisition lens and a detection probe, the material information of the solar cells is obtained. Through data comparison, it is determined whether the corresponding test data is qualified. If qualified, it rotates into the next testing channel; if unqualified, it is conveyed and removed through the corresponding conveying structure, which also facilitates rework for different unqualified defective products, can reduce the waste of production materials, and improve the production capacity of solar cells.

[0004] Based on the retrieval of the above patent and the discovery of existing technology equipment, it is found that the length and width dimensions of different types and models of battery panels are not the same. During any process of transferring the battery panel from the conveying device to the inspection platform, due to the non-uniformity of the dimensions, it is very easy for the battery panel to shift and misalign relative to the detector, and certain manual correction work is required before detection, which reduces the efficiency.

[0005] Based on this, the present invention is proposed. Summary of the Invention

[0006] According to an embodiment of the present invention, a solar cell testing device is provided to solve the problems in the existing background.

[0007] In the first aspect of the present invention, a solar cell testing device is provided.

[0008] The solar cell testing device includes: a base, a correction mechanism, a bracket, a lead screw, a first motor, a conveying mechanism, an inspection platform, and a detector;

[0009] The bracket is installed on the upper surface of the base; the lead screw is rotatably installed in the bracket; the first motor is installed on the bracket, and the output end of the first motor is connected to one end of the lead screw; the conveying mechanism is installed on the lead screw, and the rotation of the lead screw can drive the conveying mechanism to move along the axial direction of the lead screw; the inspection platform is installed on the base; the detector is installed on the base.

[0010] Preferably, the correction mechanism includes: a fixed seat, a mounting frame, a rangefinder, a rotating table, a worm gear, a worm, a second motor, a mounting member, and a roller;

[0011] The fixed seat is fixedly installed on the base; the mounting frame is installed on the fixed seat; there are two rangefinders, which are installed on the mounting frame in parallel and at intervals; the rotating table is rotatably installed on the fixed seat; the worm gear is installed on the lower surface of the rotating table; the worm is rotatably installed in the fixed seat, and the worm is meshed and connected with the worm gear; the second motor is installed in the fixed seat, and the output end of the second motor is connected to one end of the worm; there are several mounting members, which are respectively installed on the rotating table, and every two mounting members are in a group and are symmetrically arranged with each other; there are several rollers, which are respectively rotatably installed between each group of mounting members.

[0012] Preferably, the detection position of the rangefinder corresponds to the top position of the roller.

[0013] Preferably, the conveying mechanism includes: a driving seat, a connecting block, a connecting column, a rotating rod, a cylinder, and a vacuum chuck;

[0014] The driving seat is threadedly connected to the lead screw; there are several connecting blocks, and several connecting blocks are installed in the driving seat, one of the connecting blocks is fixedly installed, and the remaining connecting blocks are slidably installed in the driving seat; there are several connecting columns, which are respectively rotatably installed at the tops of several connecting blocks; there are several rotating rods, which are respectively fixedly installed on several connecting columns, and the ends of adjacent two rotating rods are rotatably connected; there are several cylinders, which are respectively installed on the lower surfaces of several connecting blocks; there are several vacuum chucks, which are respectively installed at the output ends of several cylinders.

[0015] Preferably, the conveying mechanism further includes: an extension plate, a driving groove, an electric push rod, a fixed block, a driving rod, and a through groove;

[0016] The through groove is formed in the side wall of the driving seat; the extension plate is mounted on a connecting column connected to the fixedly mounted connecting block, and the extension plate extends out of the driving seat through the through groove; the driving groove is formed on one side where the extension plate extends out of the driving seat; the electric push rod is mounted on the side wall of the driving seat; the fixed block is mounted on the output end of the electric push rod; the driving rod is mounted on the fixed block, and the top end of the driving rod is mounted in the driving groove.

[0017] Preferably, a guide rod is installed inside the bracket, and the guide rod penetrates through the driving seat.

[0018] Preferably, a linkage assembly is further installed on the base, and the linkage assembly can drive the detector to move synchronously when the conveying mechanism moves.

[0019] Preferably, the linkage assembly includes: a slideway, a sliding frame, a driving frame, a guide groove, a connecting plate and a push rod;

[0020] There are two slideways, which are respectively installed on the lower surface of the base; the sliding frame is slidably installed in the slideway; the driving frame is installed on the top end of the sliding frame, and the sliding frame is connected to the detector; the guide groove is formed in the driving frame; the connecting plate is installed on the side wall of the driving seat; the push rod is installed on the connecting plate, and the end of the push rod away from the connecting plate is installed in the guide groove.

[0021] Preferably, the guide groove includes: an inclined groove and a straight groove, and the inclined groove and the straight groove are communicated with each other.

[0022] Preferably, the cross-section of the inner cavity of the slideway is trapezoidal in an inverted shape, and the shape is adapted to the shape of the sliding frame.

[0023] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0024] 1. A solar cell testing device provided by the present invention uses two rangefinders to measure the same side of a solar panel, so as to determine whether the position of the solar panel is accurate; by driving the worm to rotate by the second motor and using the mutual cooperation of the worm and the worm gear, the rotating table can be rotated, and then the angle of the solar panel located at the top of the roller can be adjusted, so as to perform automatic calibration on it.

[0025] 2. When one of the connecting columns in the present invention rotates, by means of the linkage of the rotating rod, the distance between each connecting block can be expanded or contracted synchronously and equidistantly, so as to adjust the positions of each vacuum chuck, and the device can be adaptively adjusted according to the actual size of the solar panel, ensuring that the solar panel is uniformly and stably stressed when being sucked and transferred.

[0026] 3. In the present invention, by using the telescopic movement of the output end of the electric push rod, the fixed block and the driving rod can be moved. With the limitation of the through groove, the extension plate can drive the connecting column connected thereto to rotate, and then each rotating rod starts to rotate, so that each connecting block starts to adjust its position, which can be automatically adjusted without manual operation.

[0027] 4. In the present invention, the connecting plate and the push rod can move together with the driving seat. By using the cooperation of the push rod and the guiding groove, the driving frame can drive the sliding frame and the detector to move together, avoiding the detector from blocking the moving path of the driving seat. At the same time, it can also ensure that when the driving seat resets, the detector can automatically reset, without affecting the detection work. At the same time, the control using the mechanical structure is more precise.

[0028] In summary, it can accurately judge whether its position is accurate and can automatically calibrate the angle of the solar panel; it can also automatically adjust the position of the vacuum suction cup to ensure that the force is uniform and stable when sucking and transferring the solar panel, and this process is automatically adjusted without manual operation; in addition, it can also avoid the detector from blocking the path of the driving seat, and the detector also automatically resets after the driving seat resets, realizing precise control using the mechanical structure without affecting the detection.

[0029] It should be understood that the content described in the summary of the invention is not intended to limit the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Combined with the drawings and referring to the following detailed description, the above and other features, advantages and aspects of the embodiments of the present invention will become more obvious. In the drawings, the same or similar reference numerals represent the same or similar elements, where:

[0031] Figure 1 shows a schematic structural diagram of a solar cell testing device according to an embodiment of the present invention;

[0032] Figure 2 shows an exploded structural diagram of a solar cell testing device according to an embodiment of the present invention;

[0033] Figure 3 shows an exploded structural diagram of a correction mechanism of a solar cell testing device according to an embodiment of the present invention;

[0034] Figure 4 shows a bottom view of a rotating table of a solar cell testing device according to an embodiment of the present invention;

[0035] Figure 5 shows an enlarged view of part A of a solar cell testing device according to an embodiment of the present invention;

[0036] Figure 6 The structural schematic diagram of the conveying mechanism of the solar cell testing device according to an embodiment of the present invention is shown;

[0037] Figure 7 The top view sectional structural schematic diagram of the conveying mechanism of the solar cell testing device according to an embodiment of the present invention is shown;

[0038] Figure 8 The exploded structural schematic diagram of the conveying mechanism of the solar cell testing device according to an embodiment of the present invention is shown.

[0039] The reference numerals are as follows:

[0040] 1, base; 2, correction mechanism; 21, fixed seat; 22, mounting frame; 2201, rangefinder; 23, rotating table; 24, worm gear; 25, worm; 26, second motor; 27, mounting member; 28, idler roller; 3, bracket; 4, lead screw; 5, first motor; 6, guide rod; 7, conveying mechanism; 71, drive seat; 72, connecting block; 73, connecting column; 74, rotating rod; 75, extension plate; 76, drive groove; 77, electric push rod; 78, fixed block; 79, drive rod; 710, through groove; 711, cylinder; 712, vacuum chuck; 8, inspection platform; 9, slideway; 10, sliding frame; 11, detector; 12, drive frame; 13, guide groove; 1301, inclined groove; 1302, straight groove; 14, connecting plate; 15, push rod. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0043] Such as Figure 1 And Figure 2As shown in the figure, the solar cell testing equipment includes: a base 1, a correction mechanism 2, a bracket 3, a lead screw 4, a first motor 5, a conveying mechanism 7, an inspection platform 8, and a detector 11. The bracket 3 is installed on the upper surface of the base 1. The bracket 3 is composed of four metal frames, which are respectively installed at the four corners of the base 1. The metal frames are made of steel with good mechanical properties. This layout enables the bracket 3 to provide stable support for the upper structure of the entire equipment. The lead screw 4 is rotatably installed in the bracket 3. The first motor 5 is installed on the bracket 3, and the output end of the first motor 5 is connected to one end of the lead screw 4. Starting the first motor 5 can drive the lead screw 4 to rotate. The conveying mechanism 7 is installed on the lead screw 4. The rotation of the lead screw 4 can drive the conveying mechanism 7 to move along the axial direction of the lead screw 4. The conveying mechanism 7 is used for grasping the movement of the battery panel. The inspection platform 8 is installed on the base 1. It is the main working area for various performance detections of the battery panel. The surface of the inspection platform 8 has been leveled, with good flatness and smoothness, to ensure that the battery panel can be placed stably. The detector 11 is installed on the base 1. The detector 11 corresponds to the inspection platform 8 in position, ensuring that the detector 11 can be located directly above the inspection platform 8 during operation, so as to facilitate accurate detection. Among them, the detector 11 is an EL electroluminescence detection device, which applies a forward bias voltage to the battery panel to make it emit infrared light, and takes a luminous image through an infrared camera, and judges whether there are problems such as hidden cracks and broken grids inside the battery panel according to the luminous intensity and uniformity.

[0044] Reference Figure 3 and Figure 4 , the correction mechanism 2 includes: a fixed seat 21, a mounting frame 22, a rangefinder 2201, a rotating table 23, a worm gear 24, a worm 25, a second motor 26, a mounting member 27, and a roller 28.

[0045] The fixed base 21 is fixedly installed on the base 1. The mounting frame 22 is installed on the fixed base 21. There are two distance measuring instruments 2201, and the distance measuring instrument 2201 is an HMLDM-UD100A industrial laser distance measuring instrument. The distance measuring instrument 2201 emits a high-energy pulsed laser beam. This laser pulse shoots towards the target. When the laser irradiates the target surface, reflection will occur. The distance to the target object can be calculated by receiving the time of the reflected light. The two distance measuring instruments 2201 are installed on the mounting frame 22 parallel to each other and at intervals along the axial direction of the lead screw 4. Usually, the solar panel is in a standard rectangular shape. The two distance measuring instruments 2201 jointly measure the same side of the solar panel. If the data measured by the two distance measuring instruments 2201 are the same, it means that the placement position of the solar panel is accurate. The rotating table 23 is rotatably installed on the fixed base 21. The worm gear 24 is installed on the lower surface of the rotating table 23. The worm 25 is rotatably installed in the fixed base 21, and the worm 25 is meshed with the worm gear 24. When the worm 25 rotates, it can drive the worm gear 24 to rotate. In addition, the worm gear 24 and the worm 25 are selected with a self-locking type, which is an existing device, so as to ensure the self-locking property of their cooperation. When the worm 25 stops rotating, the worm gear 24 cannot rotate by itself. The second motor 26 is installed in the fixed base 21, and the output end of the second motor 26 is connected to one end of the worm 25. Starting the second motor 26 can make the worm 25 rotate. There are several mounting parts 27, which are respectively installed on the rotating table 23. Every two mounting parts 27 are in a group and are symmetrically arranged with each other. There are several idler rollers 28, which are respectively rotatably installed between each group of mounting parts 27. Each group of mounting parts 27 is arranged equidistantly and continuously, so as to ensure that each idler roller 28 is arranged neatly in sequence. The idler roller 28 can stably support the battery panel. The surface of the idler roller 28 is made of rubber material after leveling treatment to avoid damaging the solar panel. The detection position of the distance measuring instrument 2201 corresponds to the top position of the idler roller 28, ensuring that the laser emitted by the distance measuring instrument 2201 can accurately irradiate the solar panel placed on the top of the idler roller 28.

[0046] The specific usage method of the above structure is as follows: The solar panel is placed on the idler roller 28 by using a conveyor belt or manually. The distance measuring instrument 2201 is started to measure the distance of the same side of the solar panel. If the data obtained by the two distance measuring instruments 2201 are different, the second motor 26 is started to drive the worm 25 to rotate, and then drive the worm gear 24 and the rotating table 23 to rotate, so as to rotate and adjust the solar panel until the data obtained by the two distance measuring instruments 2201 are the same. This structure can realize the automatic calibration of the solar panel, and use the cooperation of the worm gear 24 and the worm 25 to carry out rotational adjustment to straighten the position of the solar panel.

[0047] In actual use, the transfer of solar panels is usually achieved by using vacuum suction cups. However, the length and width distances of solar panels of different sizes are different. In order to ensure stable grasping of solar panels and ensure uniform force to avoid tipping over, the following solutions are proposed. Refer to Figure 6 , Figure 7 and Figure 8As shown in the figure, the conveying mechanism 7 includes: a driving seat 71, a connecting block 72, a connecting column 73, a rotating rod 74, an extension plate 75, a driving groove 76, an electric push rod 77, a fixing block 78, a driving rod 79, a through groove 710, a cylinder 711 and a vacuum suction cup 712. The driving seat 71 is threadedly connected to the lead screw 4. When the lead screw 4 rotates, it can drive the driving seat 71 to move along the axial direction of the lead screw 4. A guide rod 6 is installed in the bracket 3, and the guide rod 6 penetrates through the driving seat 71. By using the limitation of the guide rod 6, the driving seat 71 is prevented from rotating, ensuring the stability of the driving seat 71 during movement. There are several connecting blocks 72, and several connecting blocks 72 are installed in the driving seat 71. One of the connecting blocks 72 is fixedly installed, and the remaining connecting blocks 72 are slidably installed in the driving seat 71. In this embodiment, there are five connecting blocks 72. The connecting block 72 in the middle is fixedly installed in the driving seat 71, and the remaining connecting blocks 72 are slidably installed in the driving seat 71. The shape of the connecting block 72 matches the inner cavity shape of the driving seat 71, and the two limit each other to prevent the driving seat 71 from tilting during movement. There are several connecting columns 73, which are respectively rotatably installed at the tops of several connecting blocks 72. There are several rotating rods 74, which are respectively fixedly installed on several connecting columns 73, and the ends of two adjacent rotating rods 74 are rotatably connected. Several rotating rods 74 connect each connecting column 73 and each connecting block 72 to each other. When one of the connecting columns 73 rotates relative to the connecting block 72, the distance between each connecting block 72 can be expanded or contracted by the transmission of the rotating rod 74. There are several cylinders 711, which are respectively installed on the lower surfaces of several connecting blocks 72. There are several vacuum suction cups 712, which are respectively installed at the output ends of several cylinders 711. The telescopic movement of the output end of the cylinder 711 can drive each vacuum suction cup 712 to move up and down. The device also includes an external vacuum pump, and the vacuum pump is connected to each vacuum suction cup 712 through a hose, forming a complete vacuum adsorption system. This device is an existing equipment, and any general model can be used without additional elaboration. When the vacuum suction cup 712 fits the solar panel, the vacuum pump is turned on to pump air. As the air in the pump chamber is gradually pumped out, a negative pressure environment is formed inside the vacuum suction cup 712, and the strong atmospheric pressure will tightly press the solar panel against the vacuum suction cup 712, thereby realizing the stable and reliable grasping of the solar panel, ensuring that the panel will not fall off or shift during subsequent handling, transfer and other operations, and guaranteeing the efficient and smooth operation of the entire production process. The through groove 710 is opened on the side wall of the driving seat 71. The extension plate 75 is installed on the connecting column 73 connected to the fixedly installed connecting block 72, and the extension plate 75 extends out of the driving seat 71 through the through groove 710. When the extension plate 75 rotates, it can make the connecting column 73 rotate. The driving groove 76 is opened on the side of the extension plate 75 extending out of the driving seat 71. The electric push rod 77 is installed on the side wall of the driving seat 71. The electric push rod 77 is a self-locking electric push rod, and its output end can be locked at any position.The fixed block 78 is installed at the output end of the electric push rod 77. The driving rod 79 is installed on the fixed block 78, and the top end of the driving rod 79 is installed in the driving groove 76. When the electric push rod 77 is turned on, the fixed block 78 and the driving rod 79 move. By the mutual limitation between the driving rod 79 and the driving groove 76, the extension plate 75 rotates, and at the same time, the driving rod 79 slides in the driving groove 76 to avoid interference.

[0048] The specific working principle of the above structure is as follows: When the electric push rod 77 is turned on, its output end expands and contracts, and the fixed block 78 and the driving rod 79 move synchronously. By the mutual cooperation between the driving rod 79 and the driving groove 76, the extension plate 75 rotates, and then the connecting column 73 connected thereto rotates, and then the rotating rod 74 connected to the connecting column 73 rotates. Since the rotating rods 74 are rotatably connected to each other, at this time, the rotating rods 74 rotate synchronously and drive the connecting blocks 72 except the connecting block 72 located in the middle to move synchronously, so that the distances between the connecting blocks 72 increase or contract synchronously, so that the positions of the vacuum suction cups 712 can cover the solar panel. Subsequently, each cylinder 711 is turned on synchronously to make each vacuum suction cup 712 fit the solar panel, and the vacuum pump is turned on to make the vacuum suction cup 712 stably suck the solar panel. Then, the output end of the cylinder 711 retracts, and the solar panel is grabbed. The first motor 5 is turned on to rotate the lead screw 4, so that the driving seat 71 moves along the axial direction of the lead screw 4, and the driving seat 71 is stably moved by the limitation of the guide rod 6. When the solar panel corresponds to the inspection platform 8, the solar panel is lowered and released. The above structure can automatically adjust the position of the vacuum suction cup 712 according to requirements, can cover the solar panel, and ensures stable force during grasping.

[0049] For the above structure of this embodiment, if the detector 11 is fixedly installed, it will affect the picking and placing of the solar panel. To solve this problem, the following solutions are proposed. Refer to Figure 1 、 Figure 2 and Figure 5, a linkage assembly is also installed on the base 1, and the linkage assembly can drive the detector 11 to move synchronously when the conveying mechanism 7 moves. The linkage assembly includes: a slideway 9, a sliding frame 10, a driving frame 12, a guiding groove 13, a connecting plate 14 and a push rod 15. There are two slideways 9, which are respectively installed on the lower surface of the base 1. The sliding frame 10 is slidably installed in the slideway 9, and the limit of the two slideways 9 can ensure the stable sliding of the sliding frame 10. The cross-section of the inner cavity of the slideway 9 is trapezoidal in reverse, and the shape is adapted to the shape of the sliding frame 10 to prevent the sliding frame 10 from derailing. The driving frame 12 is installed at the top of the sliding frame 10, and the sliding frame 10 is connected to the detector 11. The guiding groove 13 is opened on the driving frame 12, and the guiding groove 13 includes: an inclined groove 1301 and a straight groove 1302, and the inclined groove 1301 and the straight groove 1302 are communicated with each other. The connecting plate 14 is installed on the side wall of the driving seat 71, the push rod 15 is installed on the connecting plate 14, and one end of the push rod 15 away from the connecting plate 14 is installed in the guiding groove 13.

[0050] The specific working principle of the above structure is as follows: when the driving seat 71 starts to move, the connecting plate 14 and the push rod 15 move synchronously, and the push rod 15 slides along the inclined groove 1301, so that the driving frame 12 and the sliding frame 10 move away from the midline direction of the base 1, and at the same time drive the detector 11 to move together. When the detector 11 leaves the path of the driving seat 71, the push rod 15 slides into the straight groove 1302, and the detector 11 stops moving. When the driving seat 71 is reset, the detector 11 is also reset in the reverse direction, and the detector 11 can be used to carry out the work.

[0051] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A solar cell testing device, characterized in that, Including: a base (1), a correction mechanism (2), a bracket (3), a lead screw (4), a first motor (5), a conveying mechanism (7), an inspection platform (8) and a detector (11); The bracket (3) is installed on the upper surface of the base (1); the lead screw (4) is rotatably installed in the bracket (3); the first motor (5) is installed on the bracket (3), and the output end of the first motor (5) is connected to one end of the lead screw (4); the conveying mechanism (7) is installed on the lead screw (4), and the rotation of the lead screw (4) can drive the conveying mechanism (7) to move along the axial direction of the lead screw (4); the inspection platform (8) is installed on the base (1); the detector (11) is installed on the base (1).

2. The solar cell testing device according to claim 1, characterized in that, The correction mechanism (2) includes: a fixed seat (21), a mounting frame (22), a rangefinder (2201), a rotating table (23), a worm gear (24), a worm (25), a second motor (26), a mounting member (27) and a roller (28); The fixed seat (21) is fixedly installed on the base (1); the mounting frame (22) is installed on the fixed seat (21); there are two rangefinders (2201), which are installed on the mounting frame (22) in parallel and at intervals; the rotating table (23) is rotatably installed on the fixed seat (21); the worm gear (24) is installed on the lower surface of the rotating table (23); the worm (25) is rotatably installed in the fixed seat (21), and the worm (25) is meshed with the worm gear (24); the second motor (26) is installed in the fixed seat (21), and the output end of the second motor (26) is connected to one end of the worm (25); there are several mounting members (27), which are respectively installed on the rotating table (23), and every two mounting members (27) form a group and are symmetrically arranged with each other; there are several rollers (28), which are respectively rotatably installed between each group of mounting members (27).

3. The solar cell testing device according to claim 2, wherein The detection position of the rangefinder (2201) corresponds to the top position of the roller (28).

4. The solar cell testing device according to claim 3, characterized in that The conveying mechanism (7) includes: a driving seat (71), a connecting block (72), a connecting column (73), a rotating rod (74), a cylinder (711) and a vacuum chuck (712); The driving seat (71) is threadedly connected to the lead screw (4); there are a plurality of connecting blocks (72), and the plurality of connecting blocks (72) are installed in the driving seat (71), one of the connecting blocks (72) is fixedly installed, and the remaining connecting blocks (72) are slidably installed in the driving seat (71); there are a plurality of connecting columns (73), which are respectively rotatably installed at the tops of the plurality of connecting blocks (72); there are a plurality of rotating rods (74), which are respectively fixedly installed on the plurality of connecting columns (73), and the ends of adjacent two rotating rods (74) are rotatably connected; there are a plurality of air cylinders (711), which are respectively installed on the lower surfaces of the plurality of connecting blocks (72); there are a plurality of vacuum suction cups (712), which are respectively installed at the output ends of the plurality of air cylinders (711).

5. The solar cell testing device according to claim 4, wherein The conveying mechanism (7) further includes: an extension plate (75), a driving groove (76), an electric push rod (77), a fixing block (78), a driving rod (79) and a through groove (710); The through groove (710) is opened on the side wall of the driving seat (71); the extension plate (75) is installed on the connecting column (73) connected to the fixedly installed connecting block (72), and the extension plate (75) extends out of the driving seat (71) through the through groove (710); the driving groove (76) is opened on one side where the extension plate (75) extends out of the driving seat (71); the electric push rod (77) is installed on the side wall of the driving seat (71); the fixing block (78) is installed at the output end of the electric push rod (77); the driving rod (79) is installed on the fixing block (78), and the top end of the driving rod (79) is installed in the driving groove (76).

6. The solar cell testing device according to claim 4 or 5, characterized in that, A guide rod (6) is installed in the bracket (3), and the guide rod (6) penetrates through the driving seat (71).

7. The solar cell testing device according to claim 6, characterized in that A linkage assembly is further installed on the base (1), and the linkage assembly can drive the detector (11) to move synchronously when the conveying mechanism (7) moves.

8. The solar cell testing device according to claim 7, characterized in that, The linkage assembly includes: a slideway (9), a sliding frame (10), a driving frame (12), a guiding groove (13), a connecting plate (14) and a push rod (15); There are two slideways (9), which are respectively installed on the lower surface of the base (1); the sliding frame (10) is slidably installed in the slideway (9); the driving frame (12) is installed at the top end of the sliding frame (10), and the sliding frame (10) is connected to the detector (11); the guiding groove (13) is opened on the driving frame (12); the connecting plate (14) is installed on the side wall of the driving seat (71); the push rod (15) is installed on the connecting plate (14), and the end of the push rod (15) away from the connecting plate (14) is installed in the guiding groove (13).

9. The solar cell testing device according to claim 8, wherein The guiding groove (13) includes: an inclined groove (1301) and a straight groove (1302), and the inclined groove (1301) and the straight groove (1302) are communicated with each other.

10. The solar cell testing device according to claim 9, wherein The inner cavity cross-section of the slideway (9) is trapezoidal in reverse, and the shape is adapted to the shape of the sliding frame (10).

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