Back contact solar cell test system

Abstract

The utility model discloses a back contact solar cell test system, which belongs to the technical field of back contact solar cell test, is mainly used for testing a back contact solar cell, and comprises a substrate, a first driving part, a turntable, a cell carrying table, a moving mechanism, a conductive device and a test simulator, the substrate is provided with a first side surface and a second side surface which are oppositely arranged in a first direction; the rotating disc is connected to the side, away from the base plate, of the first driving part, and a plurality of hollowed-out areas are arranged on the rotating disc in a surrounding mode. The battery carrying tables are arranged in the hollow areas in a one-to-one correspondence manner; the moving mechanism is arranged on the side, away from the base plate, of the rotating disc and connected with the base plate. The conductive device is arranged at one end of the moving mechanism close to the turntable. According to the back contact solar cell test system, the back contact solar cell is adsorbed and supported on the cell carrying platform, and the test result is more accurate.

Description

Technical Field

[0001] This application relates to the field of back-contact solar cell testing technology, and more particularly to a back-contact solar cell testing system. Background Technology

[0002] Back-contact (BC) batteries integrate the PN junction and metal electrodes entirely on the back of the battery, eliminating front electrode obstruction, maximizing the incident light absorption area, reducing optical losses, and improving conversion efficiency. Its core technology lies in the interdigitated PN partition design of the back electrodes (alternating P-type and N-type electrodes), which reduces resistance loss by shortening the current transmission path. In recent years, "PN partition densification" has further compressed the electrode spacing to the sub-millimeter level, improving carrier collection efficiency.

[0003] Currently, 0BB (Zero Busbar) technology reduces silver consumption by eliminating the main grid and gradually reducing the width of the fine grid lines (less than 20μm). The test system needs to make contact with the fine grid lines on the back of the battery through a conductive device to complete the test. Since the fine grid line width of 0BB or BC batteries is less than 20μm and the PN region is dense, the conductive device must make precise full contact with the fine grid lines on the back of the battery.

[0004] When back-contact solar cells undergo IV and EL (Electroluminescence) tests, a light-transmitting support structure is used on the light-receiving surface to ensure that the light-receiving surface of the cell is uniformly illuminated and free from mechanical damage during the test.

[0005] In existing back-contact solar cell testing systems, flexible chucks or other flexible materials are often used to support the solar cell. A conductive device passes through the supporting chuck or flexible material to contact the grid line or PAD point on the grid line of the back-contact solar cell and then lifts the back-contact solar cell until it contacts the light-transmitting plate. The back-contact solar cell is then clamped for electrical signal acquisition. During the lifting process, the back-contact solar cell is prone to displacement, which can lead to contact position deviation and affect the accuracy of the test results. Utility Model Content

[0006] The main objective of this application is to provide a back-contact solar cell testing system, which aims to solve the problem that in traditional back-contact solar cell testing systems, the back-contact solar cells are prone to displacement during testing, resulting in contact position deviation and affecting the accuracy of test results.

[0007] To achieve the above objectives, this application provides a back-contact solar cell testing system for testing back-contact solar cells. The system includes a substrate, a first driving unit, a turntable, a cell stage, a moving mechanism, a conductive device, and a test simulator. The substrate has a first side and a second side opposite to each other in a first direction, the first direction being the same as the thickness direction of the substrate. The first driving unit is disposed on the side of the first side facing away from the second side. The turntable is connected to the side of the first driving unit facing away from the substrate and its axial direction is the same as the first direction. The turntable rotates around its own axial direction in response to the driving force of the first driving unit. The turntable has multiple hollow areas arranged around it. The cell stage is correspondingly disposed within each of the hollow areas. The side of the stage facing away from the substrate is flat. Multiple adsorption holes are provided on this side to adsorb the back-contact solar cell. The stage is made of a highly transparent optical material. A moving mechanism is located on the side of the turntable facing away from the substrate and connected to the substrate. The moving mechanism has a degree of freedom to move along a first direction. A conductive device is located at the end of the moving mechanism near the turntable. The conductive device moves in the first direction in response to the driving force of the moving mechanism to cooperate with the stage in clamping the back-contact solar cell. A test simulator is located opposite the conductive device on both sides of the turntable and is electrically connected to the conductive device. The test simulator is used to cooperate with the conductive device to test the back-contact solar cell.

[0008] Optionally, the back-contact solar cell testing system has a housing, and the substrate is fixed inside the housing; the back-contact solar cell testing system also has a cleaning mechanism, which is disposed on the side of the turntable away from the substrate and connected to the housing, and the cleaning mechanism cleans the side of the battery stage away from the substrate; the cleaning mechanism includes a positioning frame and an air pipe, the air pipe is disposed on the side of the positioning frame facing the turntable, the side of the air pipe away from the turntable is provided with a connection nozzle communicating with a second external air source, and the side of the air pipe facing the turntable is provided with multiple nozzles spaced apart along its own axial direction.

[0009] Optionally, the positioning frame has two protrusions on the side facing the turntable that are arranged opposite each other in the axial direction of the air pipe; the axial direction of the air pipe is perpendicular to the radial direction of the turntable, and both ends of the air pipe are connected to the two protrusions by bolts.

[0010] Optionally, the back-contact solar cell testing system further includes a second telescopic member, which is disposed on the side of the substrate facing the turntable and has a degree of freedom to extend and retract in a first direction. The second telescopic member is opposite to the moving mechanism in the first direction.

[0011] Optionally, the back-contact solar cell testing system further includes an image recognition mechanism and a position correction mechanism. The image recognition mechanism is located on the side of the turntable away from the substrate and is connected to the substrate. The position correction mechanism is electrically connected to the image recognition mechanism. The position correction mechanism is disposed in the circumferential direction of the turntable between the image recognition mechanism and the moving mechanism, or the position correction mechanism is connected to the moving mechanism.

[0012] Optionally, when the position correction mechanism is disposed circumferentially between the image recognition mechanism and the moving mechanism on the turntable, the position correction mechanism includes a support frame, a third driving unit, and a first correction platform. The support frame is connected to the substrate and located on the outer periphery of the turntable. The third driving unit is disposed on the side of the support frame facing the turntable and has a degree of freedom to move along the first direction. The first correction platform is disposed on the side of the turntable away from the substrate and connected to the third driving unit. A third suction cup is connected to the side of the first correction platform facing the turntable. The first correction platform is used to adjust the position of the third suction cup in a plane perpendicular to the first direction.

[0013] Optionally, when the position correction mechanism is connected to the moving mechanism, the position correction mechanism includes a second correction platform, the second correction platform is fixed to the base plate, and the moving mechanism is connected to the second correction platform; wherein, the second correction platform is used to adjust the position of the moving mechanism in a plane perpendicular to the first direction.

[0014] Optionally, the back-contact solar cell testing system further includes two sets of transport mechanisms. The two sets of transport mechanisms are distributed around the outer periphery of the turntable and connected to the substrate. The transport mechanisms are spaced apart from the moving mechanism in the circumferential direction of the turntable. The two sets of transport mechanisms are divided into a first mechanism and a second mechanism. The first mechanism is used to transport the back-contact solar cell to the station on the turntable, and the second mechanism is used to remove the back-contact solar cell from the station on the turntable.

[0015] Optionally, the transport mechanism includes a second drive unit and a first transport arm. The second drive unit is connected to the substrate and has a degree of freedom to rotate about the first direction. One end of the first transport arm is connected to the second drive unit, and the other end is connected to a first suction cup.

[0016] Optionally, the conveying mechanism includes a conveyor belt, a linear motor, and a second conveying arm. The conveyor belt is connected to the substrate. The linear motor has a slidingly fitted guide rail and a slider. One end of the guide rail is located on the side of the turntable away from the substrate, and the other end of the guide rail is located on the side of the conveyor belt away from the substrate. One end of the second conveying arm is connected to the slider, and the other end is connected to a second suction cup.

[0017] This application provides a back-contact solar cell testing system. The light-receiving surface of the back-contact solar cell is adhered to a cell platform. A first driving unit drives a turntable to rotate, causing the cell platforms in each cutout area to sequentially pass between a conductive device and a substrate. When a cell platform is positioned between the conductive device and the substrate, a moving mechanism drives the conductive device to approach the cell platform along a first direction and cooperate with the cell platform to clamp the corresponding back-contact solar cell. The conductive device contacts the fine grid lines on the non-light-receiving surface of the back-contact solar cell for testing. The side of the cell platform away from the substrate has a flat structure, allowing the back-contact solar cell to... The battery platform is supported, and the back contact solar cell is laid flat to overcome gravity deformation. The conductive device makes accurate contact with the fine grid lines of the back contact solar cell, achieving full contact. Then, the test simulator shines light from below the battery platform. The light passes through the battery platform and reaches the back contact solar cell, thus ensuring the accuracy of the test results. At the same time, the adsorption holes on the battery platform adsorb and fix the back contact solar cell. Even if the conductive device comes into contact with the fine grid lines of the back contact solar cell and generates a certain contact force, it will not cause the back contact solar cell to shift, reducing the positional deviation of the contact between the conductive device and the back contact solar cell and ensuring the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a back-contact solar cell testing system according to an embodiment of this application, when the position correction mechanism is not connected to the moving mechanism.

[0019] Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the moving mechanism in the embodiment;

[0021] Figure 4 for Figure 1 A schematic diagram of the turntable structure in the embodiment;

[0022] Figure 5 for Figure 1 A schematic diagram of the corrective mechanism in the embodiment;

[0023] Figure 6 This application provides an embodiment of a schematic diagram of the overall structure of a back-contact solar cell testing system when the position correction mechanism and the moving mechanism are connected.

[0024] Figure 7 for Figure 6 A structural schematic diagram from another perspective of the embodiment;

[0025] Figure 8 for Figure 6 A schematic diagram of the support block in the embodiment;

[0026] Figure 9 for Figure 8 A structural schematic diagram from another perspective of the embodiment;

[0027] Figure 10 for Figure 6 A schematic diagram of the turntable structure in the embodiment;

[0028] Figure 11 for Figure 10 A structural schematic diagram from another perspective of the embodiment.

[0029] In the diagram: 1. Base plate; 11. Support platform; 12. Test simulator; 2. First telescopic component; 3. Conductive device; 41. First drive unit; 42. Turntable; 421. Connecting frame; 422. Air slip ring fixing part; 423. Air slip ring rotating part; 424. Battery platform; 425. Air nozzle; 5. Carrying mechanism; 51. Second drive unit; 52. First carrying arm; 53. Conveyor belt; 54. Linear motor; 541. Guide rail; 542. Slider; 55. Second carrying arm; 6. Image recognition mechanism; 7. Position correction mechanism; 71. Support frame; 72. Third drive unit; 73. First correction platform; 74. Second correction platform; 8. Second telescopic component; 81. Support block; 9. Cleaning mechanism; 91. Positioning frame; 92. Air pipe; 93. Baffle.

[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] 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.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] refer to Figures 1 to 11This application provides a back-contact solar cell testing system for testing back-contact solar cells. The back-contact solar cell testing system has a housing and may include a substrate 1, a first driving unit 41, a turntable 42, a cell stage 424, a moving mechanism, a conductive device 3, and a test simulator 12. The substrate 1 is fixed inside the housing and has a first side and a second side opposite to each other in a first direction, the first direction being the same as the thickness direction of the substrate 1. The first driving unit 41 is disposed on the side of the first side away from the second side. The turntable 42 is connected to the side of the first driving unit 41 away from the substrate 1 and its axial direction is the same as the first direction. The turntable 42 rotates around its own axial direction in response to the driving force of the first driving unit 41. The turntable 42 has multiple hollow areas arranged around its perimeter. The cell stage 42... 4 are arranged in a one-to-one correspondence within the hollow area. The side of the battery platform 424 facing away from the substrate 1 is a flat structure. The side of the battery platform 424 facing away from the substrate 1 is provided with multiple adsorption holes to adsorb the back contact solar cells. The battery platform 424 is made of optically highly transparent material. The moving mechanism is arranged on the side of the turntable 42 facing away from the substrate 1 and connected to the substrate 1. The moving mechanism has the freedom to move along the first direction. The conductive device 3 is arranged at one end of the moving mechanism near the turntable 42. The conductive device 3 moves in the first direction in response to the driving force of the moving mechanism to cooperate with the battery platform 424 to clamp the back contact solar cells. The test simulator 12 is arranged opposite to the conductive device 3 on both sides of the turntable 42 and is electrically connected to the conductive device 3. The test simulator 12 is used to cooperate with the conductive device 3 to test the back contact solar cells.

[0036] This application provides a back-contact solar cell testing system. The light-receiving surface of the back-contact solar cell is adsorbed and bonded to the cell platform 424. A first driving unit 41 drives a turntable 42 to rotate, causing the cell platforms 424 in each hollowed-out area to sequentially pass between the conductive device 3 and the substrate 1. When a cell platform 424 is positioned between the conductive device 3 and the substrate 1, a moving mechanism drives the conductive device 3 to approach the cell platform 424 along a first direction and cooperate with the cell platform 424 to clamp the corresponding back-contact solar cell. The conductive device 3 contacts the fine grid lines on the non-light-receiving surface of the back-contact solar cell for testing. The side of the cell platform 424 facing away from the substrate 1 is flat and has a structure. The solar cells are supported on the battery platform 424, with the back contact solar cells laid flat to overcome gravity deformation. The conductive device 3 makes accurate contact with the fine grid lines of the back contact solar cells. Then, the test simulator 12 shines light below the battery platform 424, and the light passes through the battery platform 424 to reach the back contact solar cells, thus ensuring the accuracy of the test results. At the same time, negative pressure compressed air is introduced into the adsorption holes on the battery platform 424 to adsorb and fix the back contact solar cells. Even if the conductive device 3 contacts the fine grid lines of the back contact solar cells and generates a certain contact force, it will not cause the back contact solar cells to shift, reducing the positional deviation of the contact between the conductive device 3 and the back contact solar cells and ensuring the accuracy of the test results.

[0037] In addition, for ease of explanation, the example given is the fine grid lines on the back of the solar cell that are in contact with the back of the conductive device 3.

[0038] Furthermore, the battery platform 424 can also be a rigid structure, so that when the conductive device 3 and the battery platform 424 clamp the back contact solar cell, the battery platform 424 will hardly deform, so that the back contact solar cell remains flat and in complete contact with the conductive device 3.

[0039] like Figure 1 As shown, the first direction is the X direction, which is the thickness direction of the substrate 1 and also the height direction of the entire testing device. When the testing device is in use, the height direction of the testing device should be the same as the direction of gravity. For ease of explanation, the following explanation will assume that the first direction is the same as the direction of gravity.

[0040] In some traditional solutions, two horizontally spaced support rods are often used to support the back-contact solar cell. The fine grid lines of the back-contact solar cell are located below it. The test fixture is divided into upper and lower parts, with the conductive device located below the back-contact solar cell and the clamping part cooperating with the conductive device located above it. During testing, the conductive device and the clamping part move closer together, allowing the conductive device to lift the back-contact solar cell and clamp it in place. At this point, the back-contact solar cell separates from the support rods, and good contact is maintained between the back-contact solar cell and the conductive device, allowing for testing. However, during this process, the conductive device needs to avoid the support rods to clamp the back-contact solar cell together with the clamping part. This causes a misalignment between the fine grid lines of the back-contact solar cell located on the support rods and the conductive device, preventing the conductive device from making complete contact with the fine grid lines on the back-contact solar cell, thus affecting the test results.

[0041] In this embodiment, the battery stage 424 and the conductive device 3 are used to clamp the back contact solar cell. The conductive device 3 does not need to avoid any mechanism during its movement, so that the conductive device 3 can make complete contact with the fine grid lines on the back contact solar cell, resulting in better test results.

[0042] Furthermore, in this embodiment, the adsorption holes on the battery platform 424 adsorb and fix the back contact solar cell. In this way, even when testing back contact solar cells of different sizes, the back contact solar cells can be adsorbed and fixed through the adsorption holes, which is convenient and quick. However, in the traditional solution, it is necessary to adjust the distance between the two support rods to accommodate back contact solar cells of different sizes. Moreover, after the distance between the two support rods is adjusted, the process of the conductive device avoiding the support rods also needs to be adjusted accordingly, which is extremely complicated and inconvenient.

[0043] It should be understood that the housing of the test apparatus (not shown in the figure) in the following text protects the components inside the test apparatus.

[0044] Specifically, the first drive unit 41 can be a first motor. When the first motor rotates, it can drive the turntable 42 to rotate around the first direction, so that each hollow area on the turntable 42 passes under the conductive device 3 in sequence for testing. For ease of explanation, the hollow area can be regarded as a work station, and multiple hollow areas correspond to multiple work stations.

[0045] It should be noted that the battery stage 424 is made of a high-transmittance optical material, such as high-transmittance glass. Therefore, if the light-receiving surface of the back contact solar cell needs to be illuminated during testing, it can be illuminated from below the battery stage 424.

[0046] Specifically, the test simulator 12 can be electrically connected to the conductive device 3 to perform IV and EL tests on the back contact solar cells. There are many existing solutions for how the test simulator 12 performs the tests, which will not be described in detail here.

[0047] In addition, the light source can be integrated into the test simulator 12, so that the test simulator 12 can be set below the turntable 42, so that the back contact solar cell can be illuminated by the light source for testing.

[0048] In this embodiment, the turntable 42 has four workstations, which are evenly spaced around each other. Each workstation is detachably connected to the battery platform 424 by bolts. The battery platform 424 provides full support for the back contact solar cells. At the same time, the battery platform 424 is provided with an adsorption structure to adsorb and fix the back contact solar cells on it.

[0049] It should be noted that when the back contact solar cell is located on the battery stage 424, the light-receiving surface of the back contact solar cell faces the battery stage 424. Thus, when the conductive device 3 and the battery stage 424 clamp the back contact solar cell, the conductive device 3 can contact the fine grid lines on the non-light-receiving surface of the back contact solar cell.

[0050] refer to Figure 1 and Figure 3 In an exemplary embodiment, the back-contact solar cell testing system may further include a support platform 11, which is fixed to the side of the first side away from the second side; the moving mechanism may include a first telescopic member 2, which passes through the support platform 11 and extends along a first direction, and has a degree of freedom to extend and retract along the first direction; wherein, a conductive device 3 is disposed at one end of the first telescopic member 2 near the substrate 1.

[0051] The first telescopic member 2 can be a first electric cylinder, which can extend and retract along a first direction. The first electric cylinder has a first cylinder body and a first piston rod. The first cylinder body can be set on the side of the support platform 11 away from the substrate 1. The first piston rod passes through the support platform 11. The conductive device 3 is set at the end of the first piston rod away from the first cylinder body. When the first telescopic member 2 extends, the first piston rod can drive the conductive device 3 to move downward, so that the conductive device 3 is close to the battery carrier 424, so that the conductive device 3 contacts the fine grid lines on the non-light-receiving surface of the back contact solar cell for testing. After the test is completed, the first piston rod retracts, the conductive device 3 is lifted, and no longer clamps the back contact solar cell.

[0052] Combination Figure 1 and Figure 3The conductive device 3 is provided with a guide rod extending in the first direction on the side away from the substrate 1. The guide rod passes through the support platform 11 and slides with the support platform 11, so that the guide rod can slide and guide in the first direction. In this way, the process of the first telescopic member 2 driving the conductive device 3 to move is more stable.

[0053] refer to Figure 3 , Figure 10 and Figure 11 In an exemplary embodiment, the battery stage 424 has a hollow region inside, which is connected to the adsorption holes. The back contact solar cell testing system may also include a connecting frame 421, a slip ring fixing part 422, a slip ring rotating part 423, and a nozzle 425. The connecting frame 421 is disposed on the side of the turntable 42 away from the substrate 1 and is fixed to the outer shell. The slip ring fixing part 422 is fixed to the end of the connecting frame 421 near the turntable 42 and is connected to a first external air source. The slip ring rotating part 423 is rotatably connected to the end of the slip ring fixing part 422 away from the connecting frame 421 and has a degree of freedom to rotate around a first direction. The slip ring rotating part 423 is internally connected to the slip ring fixing part 422. The nozzles 425 are disposed one-to-one on the side of the battery stage 424 near the center of the turntable 42 and are connected to the corresponding hollow regions. Each nozzle 425 is connected to the slip ring rotating part 423 through a valve.

[0054] Specifically, the battery stage 424 has multiple adsorption holes arranged in a rectangular array on the side facing away from the substrate 1. An air nozzle 425 is provided near the center of the turntable 42 on the battery stage 424. The air nozzle 425, the hollow area inside the battery stage 424, and the adsorption holes are interconnected. When the back contact solar cell covers the adsorption holes on the battery stage 424, negative pressure compressed air is introduced into the air nozzle 425 to create a vacuum. The back contact solar cell is adsorbed onto the surface of the battery stage 424. At this time, the back contact solar cell and the battery stage 424 are relatively stationary and will not be displaced by external forces, ensuring that the position of the fine grid lines of the back contact solar cell is determined. Thus, when the conductive device 3 directly contacts the back contact solar cell, the contact position is accurate.

[0055] In addition, a slip ring rotating part 423 is fixed at the center of the side of the turntable 42 away from the substrate 1. A slip ring fixing part 422 is rotatably connected to the side of the slip ring rotating part 423 away from the turntable 42. The slip ring fixing part 422 and the slip ring rotating part 423 can rotate relative to each other in the first direction and are internally connected to each other, so as to conduct gas. A connecting frame 421 is fixed at the end of the slip ring fixing part 422 away from the slip ring rotating part 423. The connecting frame 421 can be fixed to the outer shell of the test device. The connecting frame 421 is fixed relative to the substrate 1, and the air slip ring fixing part 422 is fixed relative to the substrate 1. The air slip ring fixing part 422 can be connected to an external air source, and the air slip ring rotating part 423 is connected to the air nozzle 425 on each battery platform 424. In this way, even when the turntable 42 is rotating, negative pressure compressed air can be introduced into the battery platform 424 through the air slip ring fixing part 422 and the air slip ring rotating part 423 to adsorb the back contact solar cells.

[0056] Furthermore, an electric valve is installed on the pipeline connecting the air slip ring rotating part 423 and each air nozzle 425 to control whether the connection is made, so that the adsorption of the back contact solar cells on the four battery carriers 424 can be controlled individually.

[0057] The adsorption structure consists of an adsorption hole, a hollow area inside the battery stage 424, and an air nozzle 425. A set of adsorption structures can include a set of adsorption holes, a hollow area inside the battery stage 424, and an air nozzle 425 to adsorb one back-contact solar cell. A set of adsorption structures can also include multiple sets of adsorption holes, cavities, and air nozzles 425 to adsorb multiple back-contact solar cells.

[0058] Of course, even if a set of adsorption structures only includes a set of adsorption holes, cavities and air nozzles 425, it can adsorb multiple back contact solar cells. This is because multiple back contact solar cells only need to cover all the adsorption holes in the corresponding adsorption structure.

[0059] refer to Figure 1 , Figure 2 as well as Figure 11 In an exemplary embodiment, the back-contact solar cell testing system has a housing, and the substrate 1 is fixed inside the housing. The back-contact solar cell testing system also has a cleaning mechanism 9, which is disposed on the side of the turntable 42 away from the substrate 1 and connected to the housing. The cleaning mechanism 9 cleans the side of the battery stage 424 away from the substrate 1. The cleaning mechanism 9 may include a positioning frame 91 and an air pipe 92. The air pipe 92 is disposed on the side of the positioning frame 91 facing the turntable 42. The side of the air pipe 92 away from the turntable 42 is provided with a connecting nozzle that communicates with a second external air source. The side of the air pipe 92 facing the turntable 42 has multiple nozzles spaced apart along its own axial direction.

[0060] Specifically, after the test is completed and the back contact solar cell is removed from the battery platform 424, the cleaning mechanism 9 can clean the impurities on the battery platform 424 to avoid the generation of fragments due to the accumulation of impurities, so as to ensure the subsequent adsorption and support effect of the battery platform 424 on the back contact solar cell.

[0061] like Figure 1 and Figure 2 As shown, the cleaning mechanism 9 can be directly connected to the substrate 1, that is, connected to the outer casing through the substrate 1; of course, as... Figure 10 and Figure 11 As shown, the cleaning mechanism 9 can also be connected to the connecting frame 421, that is, connected to the outer casing through the connecting frame 421; the cleaning mechanism 9 cleans the battery platform 424 to remove impurities on the battery platform 424, ensuring that the battery platform 424 can properly adsorb the back contact solar cells.

[0062] The side of the air pipe 92 away from the turntable 42 is connected to an external air source. The external air source introduces high-pressure gas into the air pipe 92 and sprays it out from the air nozzle 425 on the air pipe 92, blowing impurities off the battery carrier 424.

[0063] refer to Figure 11 In an exemplary embodiment, the positioning frame 91 has two protrusions on the side facing the turntable 42 that are axially opposite to each other on the air pipe 92; the axial direction of the air pipe 92 is perpendicular to the radial direction of the turntable 42, and both ends of the air pipe 92 are connected to the two protrusions by bolts.

[0064] Specifically, the two ends of the air pipe 92 are connected to the protrusion by bolts. Loosening the bolts allows the air pipe 92 to be rotated around its axis, thereby adjusting the direction of the nozzle and making it easier to blow impurities out of the outer periphery of the turntable 42.

[0065] like Figure 11 The air tubes 92 shown are multiple and distributed radially at intervals along the turntable 42, so that multiple air tubes 92 can better remove impurities.

[0066] Alternatively, the cleaning mechanism 9 may not have an air pipe 92, but instead has multiple roller brushes. The axial direction of the roller brushes is the same as the radial direction of the turntable 42, and the roller brushes are also located on the side of the positioning frame 91 facing the turntable 42. The roller brushes are rotatably connected to the positioning frame 91 and have the freedom to rotate around their own axial direction. The roller brushes are in contact with the turntable 42. Thus, when the turntable 42 rotates, the roller brushes also rotate due to the friction force of the turntable 42, cleaning the battery platform 424.

[0067] Of course, such as Figure 2As shown, the cleaning mechanism 9 can also be equipped with only one baffle 93. A support structure is provided on the base plate 1. The support structure is located on the outer periphery of the turntable 42. The baffle 93 is connected to the support structure and the baffle 93 abuts against the turntable 42. In this way, during the rotation of the turntable 42, the impurities on the turntable 42 will be blocked by the baffle 93 and gradually moved out of the turntable 42 due to the centrifugal force.

[0068] In addition, openings are provided between each station on the turntable 42, so that impurities can fall through the openings and be cleaned out of the turntable 42 by the baffle 93, or by the roller brush or air pipe 92.

[0069] It should be understood that the cleaning mechanism 9 mainly cleans the battery platform 424 to ensure that the battery platform 424 can properly adsorb the back contact solar cells. The side of the battery platform 424 away from the substrate 1 is a flat structure. Thus, whether the air pipe 92 is used for blowing, the roller brush is used for cleaning, or the baffle 93 is used for blocking, the cleaning mechanism 9 works in conjunction with the flat structure of the battery platform 424 to achieve better cleaning results.

[0070] refer to Figure 8 and Figure 9 In an exemplary embodiment, the back-contact solar cell testing system may further include a second telescopic member 8, which is disposed on the side of the substrate 1 facing the turntable 42 and has a degree of freedom to extend and retract in a first direction. The second telescopic member 8 is opposite to the moving mechanism in the first direction.

[0071] Specifically, the second telescopic member 8 can also be a second electric cylinder, and it can extend and retract along the first direction. The second electric cylinder has a second cylinder body and a second piston rod. The second cylinder body is fixed to the substrate 1, and the second piston rod is located at one end of the second cylinder body near the turntable 42. When the conductive device 3 moves downward until the conductive device 3 and the turntable 42 clamp and back-contact the solar cell, the second telescopic member 8 extends synchronously, so that the second piston rod abuts against the turntable 42, thereby supporting the turntable 42. The second telescopic member 8 is opposite to the moving mechanism in the first direction. In this way, the conductive device 3 and the second telescopic member 8 apply force to the turntable 42 on both sides of the turntable 42 to maintain the balance of the turntable 42 and prevent the turntable 42 from tilting due to the pressure of the conductive device 3.

[0072] like Figure 8 and Figure 9 As shown, there are two second telescopic members 8 arranged opposite each other. The opposite direction is perpendicular to the radial direction and the first direction of the corresponding position on the turntable 42 where the battery platform 424 is located. The two second electric cylinders independently adjust the extension height of the second piston rod by driving themselves to ensure the balance of the support force on both sides, thus better preventing the turntable 42 from tilting.

[0073] In addition, such as Figure 9As shown, a support block 81 is provided at the end of the second piston rod away from the second cylinder body, and a support column is provided on the side of the support block 81 away from the second piston rod. The end of the support column away from the support block 81 is spherically designed. In this way, when the second telescopic member 8 extends, the support column abuts against the turntable 42 to provide point contact support for the turntable 42. This point contact support has a better support effect and does not have the problem of poor abutment effect due to uneven contact surface.

[0074] Furthermore, multiple support columns of the same length in the first direction can also be set on the same support block 81 to provide support together.

[0075] refer to Figures 1-3 In an exemplary embodiment, the back-contact solar cell testing system may further include two sets of transport mechanisms 5, which are distributed around the outer periphery of the turntable 42 and connected to the substrate 1. The transport mechanisms 5 are spaced apart from the moving mechanism in the circumferential direction of the turntable 42. The two sets of transport mechanisms 5 are divided into a first mechanism and a second mechanism. The first mechanism is used to transport the back-contact solar cell to the work station of the turntable 42, and the second mechanism is used to remove the back-contact solar cell from the work station of the turntable 42.

[0076] Specifically, when the turntable 42 rotates and drives a station to the first mechanism, the first mechanism can transport the back-contact solar cell to the battery platform 424 at this station; then the turntable 42 rotates and rotates the back-contact solar cell to the underside of the conductive device 3 for testing. After the test is completed, the turntable 42 continues to rotate and rotates the back-contact solar cell to the second mechanism, which then transports the back-contact solar cell at the station to the subsequent process.

[0077] It should be understood that there are three optimal workstations on the turntable 42 at this time, with the angle between the line connecting adjacent workstations and the center of the turntable 42 being 120°. This ensures that the angle between the line connecting adjacent two of the first mechanism, the second mechanism, and the conductive device 3 and the center of the turntable 42 is 120°. Thus, when one workstation is at the first mechanism, the other two workstations are located below the conductive device 3 and at the second mechanism, respectively. In this way, the loading, testing, and unloading operations can be performed simultaneously. The rotation of the turntable 42 drives each workstation to pass sequentially at the first mechanism, below the conductive device 3, and at the second mechanism. During the loading, testing, and unloading operations, the turntable 42 stops rotating.

[0078] refer to Figure 1 and Figure 2 In an exemplary embodiment, the transport mechanism 5 may include a second drive unit 51 and a first transport arm 52. The second drive unit 51 is connected to the substrate 1 and has a degree of freedom to rotate about a first direction. One end of the first transport arm 52 is connected to the second drive unit 51 and the other end is connected to a first suction cup.

[0079] Specifically, the second drive unit 51 can be a second motor, and the output shaft of the second motor is axially the same as the first direction, which can drive the first carrier arm 52 to rotate around the first direction.

[0080] This is one embodiment of the transport mechanism 5. If this embodiment is used as the first mechanism, when a station moves from the second mechanism to the first mechanism, this station is recorded as the first station. At this time, no back contact solar cell is placed on the first station, the first suction cup is in the initial position, the first transport arm 52 drives the first suction cup to pick up the external back contact solar cell, at this time the back contact solar cell is located below the first suction cup, and the light-receiving surface of the back contact solar cell is facing down; then the second motor drives the first transport arm 52 to rotate, so that the first suction cup rotates to above the first station, at this time the first suction cup releases the back contact solar cell, the back contact solar cell falls on the battery platform 424 at the first station, the second motor drives the first suction cup to rotate back to the initial position, the battery platform 424 at the first station adsorbs the back contact solar cell, and the loading operation is completed.

[0081] When the first suction cup is in the initial position, the first suction cup is outside the turntable 42, that is, the first suction cup does not have a projection along the first direction on the turntable 42.

[0082] If this implementation method is used as the second mechanism, when a station moves from below the conductive device 3 to the second mechanism, this station is recorded as the second station. At this time, the first suction cup is in the initial position, and the second motor drives the first carrier arm 52 to rotate, so that the first suction cup rotates to the top of the second station. At this time, the battery platform 424 at the second station no longer adsorbs the back contact solar cell. The first suction cup picks up the back contact solar cell, and then the second motor drives the first suction cup to rotate back to the initial position, so that the back contact solar cell can be transported to the subsequent process to complete the unloading operation.

[0083] refer to Figure 1 and Figure 2 In an exemplary embodiment, the transport mechanism 5 may include a conveyor belt 53, a linear motor 54, and a second transport arm 55. The conveyor belt 53 is connected to the substrate 1. The linear motor 54 has a slidingly engaged guide rail 541 and a slider 542. One end of the guide rail 541 is located on the side of the turntable 42 away from the substrate 1, and the other end of the guide rail 541 is located on the side of the conveyor belt 53 away from the substrate 1. One end of the second transport arm 55 is connected to the slider 542, and the other end is connected to a second suction cup.

[0084] Specifically, the linear motor 54 includes a guide rail 541 and a slider 542 that can move along the guide rail 541.

[0085] This is the second implementation of the transport mechanism 5. If this implementation is used as the first mechanism, when a station moves from the second mechanism to the first mechanism, this station is recorded as the third station. At this time, no back contact solar cell is placed on the third station. The conveyor belt 53 transports the back contact solar cell to the outer periphery of the turntable 42. The light-receiving surface of the back contact solar cell faces down. At this time, the second suction cup is in the initial position and picks up the back contact solar cell. Then, the slider 542 slides along the guide rail 541, so that the second suction cup moves to above the third station. The second suction cup releases the back contact solar cell, and the back contact solar cell falls on the battery platform 424 at the third station. Then, the slider 542 slides along the guide rail 541, so that the second suction cup moves back to the initial position. The battery platform 424 at the third station adsorbs the back contact solar cell, completing the loading operation.

[0086] When the second suction cup is in its initial position, it is positioned above the conveyor belt 53.

[0087] If this embodiment is used as the second mechanism, when a station moves from below the conductive device 3 to the second mechanism, this station is recorded as the fourth station. The slider 542 slides along the guide rail 541, causing the second suction cup to move above the fourth station. At this time, the battery platform 424 at the fourth station no longer adsorbs the back contact solar cell, and the second suction cup picks up the back contact solar cell. Then the slider 542 slides along the guide rail 541, causing the second suction cup to move to the initial position. At this time, the second suction cup releases the back contact solar cell, completing the unloading operation.

[0088] It should be noted that when the second suction cup is adsorbing or releasing the back contact solar cell on the conveyor belt 53, the conveyor belt 53 should be in a stopped state to prevent wear on the back contact solar cell.

[0089] In addition, either the first or second mechanism can adopt the scheme in Implementation Method 1 or Implementation Method 2, so that the first and second mechanisms can be adapted to more usage scenarios.

[0090] It should be understood that both the first and second suction cups are non-contact suction cups.

[0091] refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 In an exemplary embodiment, the back-contact solar cell testing system may further include an image recognition mechanism 6 and a position correction mechanism 7. The image recognition mechanism 6 is located on the side of the turntable 42 away from the substrate 1 and is connected to the substrate 1. The position correction mechanism 7 is electrically connected to the image recognition mechanism 6. The position correction mechanism 7 is disposed in the circumferential direction of the turntable 42 between the first mechanism and the moving mechanism, or the position correction mechanism 7 is connected to the moving mechanism.

[0092] When the first mechanism transports the back-contact solar cell to a workstation, the image recognition mechanism 6 is opposite to this workstation in the first direction; therefore, the image recognition mechanism 6 can also be understood as the location of the first mechanism.

[0093] Specifically, when the first mechanism transports the back-contact solar cell to a workstation, the image recognition mechanism 6 is aligned with the corresponding workstation in the first direction. This allows the image recognition mechanism 6 to identify the positions of feature points on the back-contact solar cell and send this position information to the position correction mechanism 7. The conductive device 3 is in a standard position, and the position correction mechanism 7 is equipped with standard position information. The position correction mechanism 7 compares the cell position information transmitted by the image recognition mechanism 6 with the set standard position information. If the position correction mechanism 7 is located between the first mechanism and the moving mechanism, when the back-contact solar cell moves to the position correction mechanism 7, the position correction mechanism 7 adjusts the position of the back-contact solar cell, ensuring that the back-contact solar cell... When the contact solar cell reaches the standard position, the conductive device 3 can fully contact the fine grid lines on the non-light-receiving surface of the back contact solar cell when it clamps the back contact solar cell. This prevents positional deviation between the back contact solar cell and the conductive device 3, ensuring the test results. If the position correction mechanism 7 is connected to the moving mechanism, the position correction mechanism 7 adjusts the position of the moving mechanism so that the conductive device 3 moves from the standard position to the position of the back contact solar cell. In this way, when the back contact solar cell moves below the conductive device 3, there will be no positional deviation between the back contact solar cell and the conductive device 3. The conductive device 3 can then move downwards to fully contact the fine grid lines on the non-light-receiving surface of the back contact solar cell, ensuring the test results.

[0094] Furthermore, when the side of the battery platform 424 facing away from the substrate 1 is a flat and rigid structure, the back contact solar cell is laid flat, overcoming gravity deformation and effectively improving the recognition accuracy of the image recognition mechanism 6, thereby enabling the position correction mechanism 7 to correct accurately.

[0095] In addition, combined Figure 1 , Figure 2 and Figure 5At this time, the position correction mechanism 7 is set between the image recognition mechanism 6 and the moving mechanism; then, it is optimal to have four workstations on the turntable 42, with the angle between the line connecting adjacent workstations and the center of the turntable 42 being 90°, so that the angle between the line connecting adjacent two of the first mechanism, the position correction mechanism 7, the second mechanism, and the conductive device 3 and the center of the turntable 42 is 90°; thus, when one workstation is at the first mechanism, the other three workstations are respectively at the position correction mechanism 7, below the conductive device 3, and at the second mechanism; thus, the loading operation, position correction operation, testing operation, and unloading operation can be performed simultaneously, with the turntable 42 rotating to drive each workstation to pass sequentially at the first mechanism, the position correction mechanism 7, below the conductive device 3, and the second mechanism; wherein, during the loading operation, position correction operation, testing operation, and unloading operation, the turntable 42 stops rotating.

[0096] When the position correction mechanism 7 is connected to the moving mechanism, the workstations on the turntable 42 can still adopt the design scheme of the above three workstations; in the embodiments of this application, such as Figure 6 and Figure 7 As shown, a four-station design is adopted here, and the angle between the line connecting the adjacent stations and the center of the turntable 42 is 90°; the first mechanism and the second mechanism are arranged opposite to each other, and the conductive device 3 is located between the first mechanism and the second mechanism, so that the angle between the first mechanism and the conductive device 3 and the line connecting the center of the turntable 42 is 90°.

[0097] In an exemplary embodiment, the cleaning mechanism 9 is located on the side of the turntable 42 away from the substrate 1 and is located between the first mechanism and the second mechanism.

[0098] Specifically, the cleaning mechanism 9 can clean the battery platform 424 after passing through the second mechanism to remove impurities on the battery platform 424, ensuring that the battery platform 424 can properly adsorb the back contact solar cell when it rotates to the first mechanism.

[0099] like Figure 2 As shown, when the position correction mechanism 7 is located between the first mechanism and the moving mechanism, the turntable 42 rotates and drives each station to pass through the first mechanism, the position correction mechanism 7, the conductive device 3, the second mechanism, and the cleaning mechanism 9 in sequence, and finally returns to the first mechanism.

[0100] like Figure 7 , Figure 10 as well as Figure 11 As shown, when the position correction mechanism 7 is connected to the moving mechanism, it can be set opposite to the conductive device 3, so that the angle between the cleaning mechanism 9 and the first mechanism and the line connecting them to the center of the turntable 42 is 90°. The turntable 42 rotates and drives each station to pass through the first mechanism, the position correction mechanism 7, the conductive device 3, the second mechanism, and the cleaning mechanism 9 in sequence, and finally return to the first mechanism.

[0101] refer to Figure 1 , Figure 2 and Figure 5 In an exemplary embodiment, when the position correction mechanism 7 is disposed between the first mechanism and the moving mechanism in the circumferential direction of the turntable 42, the position correction mechanism 7 may include a support frame 71, a third drive unit 72, and a first correction platform 73. The support frame 71 is connected to the substrate 1 and located on the outer periphery of the turntable 42. The third drive unit 72 is disposed on the side of the support frame 71 facing the turntable 42 and has a degree of freedom to move along the first direction. The first correction platform 73 is disposed on the side of the turntable 42 away from the substrate 1 and is connected to the third drive unit 72. A third suction cup is connected to the side of the first correction platform 73 facing the turntable 42. The first correction platform 73 is used to adjust the position of the third suction cup in a plane perpendicular to the first direction.

[0102] The third drive unit 72 can be a third electric cylinder, which can extend and retract along the first direction. The third drive unit 72 drives the first correction platform 73 to move in the first direction. The plane perpendicular to the first direction is called the adjustment plane.

[0103] When the position correction mechanism 7 is positioned circumferentially between the first mechanism and the moving mechanism on the turntable 42, and the back contact solar cell moves to the position correction mechanism 7, the third suction cup is positioned above the back contact solar cell. The third drive unit 72 drives the first correction platform 73 and the third suction cup to move downwards until the third suction cup adheres to the back contact solar cell. At this time, the battery platform 424 no longer adheres to the back contact solar cell, and the third suction cup adheres to the back contact solar cell. Then, the third drive unit 72 drives the first correction platform 73 and the back contact solar cell to move upwards, and the first correction platform 73 adjusts the position of the third suction cup in the adjustment plane. After the adjustment is completed, the third drive unit 72 drives the first correction platform 73 and the third suction cup to move downwards until the back contact solar cell adheres to the battery platform 424. At this time, the third suction cup no longer adheres to the back contact solar cell, and the battery platform 424 adheres to the back contact solar cell. In this way, the back contact solar cell can be placed in the standard position.

[0104] It should be noted that the first correction platform 73 is consistent with the subsequent second correction platform 74, both containing three drive motors arranged on the three sides of a square in the adjustment plane. The motor shafts extend in the same direction as the sides of the square, which can adjust the position of the target in the adjustment plane. Moreover, the three drive motors rotate in different numbers of revolutions, which can adjust the angle of rotation of the target around the first direction. There are many existing solutions for the correction platform. This is only an example and no specific limitation is made.

[0105] refer to Figures 6-9In an exemplary embodiment, when the position correction mechanism 7 is connected to the moving mechanism, the position correction mechanism 7 may include a second correction platform 74, which is fixed to the substrate 1, and the moving mechanism is connected to the second correction platform 74; wherein, the second correction platform 74 is used to adjust the position of the moving mechanism in a plane perpendicular to the first direction.

[0106] Specifically, such as Figure 6 As shown, the second correction platform 74 can also be fixed to the substrate 1 via the support platform 11. The output end of the second correction platform 74 is connected to the first telescopic member 2. In this way, the second correction platform 74 can move the conductive device 3 from the standard position to the position of the back contact solar cell within the adjustment plane. Thus, when the back contact solar cell moves to below the conductive device 3, there will be no positional deviation between the back contact solar cell and the conductive device 3. The first telescopic member 2 drives the conductive device 3 to move downward so that it can fully contact the fine grid lines on the non-light-receiving surface of the back contact solar cell, ensuring the test effect.

[0107] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A back-contact solar cell testing system, characterized in that, A back-contact solar cell testing system is used for testing back-contact solar cells, comprising: The substrate (1) has a first side surface and a second side surface disposed opposite to each other in a first direction, the first direction being the same as the thickness direction of the substrate (1); The first driving unit (41) is disposed on the side of the first side away from the second side; Turntable (42) is connected to the side of the first drive unit (41) away from the substrate (1) and its axis is the same as the first direction. The turntable (42) rotates around its own axis in response to the driving force of the first drive unit (41). The turntable (42) has a number of hollow areas arranged around it. A battery platform (424) is disposed in the hollow area in a corresponding manner. The side of the battery platform (424) facing away from the substrate (1) is a flat structure. The side of the battery platform (424) facing away from the substrate (1) is provided with a plurality of adsorption holes to adsorb the back contact solar cell. The battery platform (424) is made of optically highly transparent material. A moving mechanism is disposed on the side of the turntable (42) away from the substrate (1) and connected to the substrate (1), and the moving mechanism has a degree of freedom to move along the first direction; A conductive device (3) is disposed at one end of the moving mechanism near the turntable (42). The conductive device (3) moves in the first direction in response to the driving force of the moving mechanism to cooperate with the battery platform (424) to clamp the back contact solar cell. A test simulator (12) is disposed on both sides of the turntable (42) opposite to the conductive device (3) and electrically connected to the conductive device (3). The test simulator (12) is used to cooperate with the conductive device (3) to test the back contact solar cell.

2. The back-contact solar cell testing system as described in claim 1, characterized in that, The back-contact solar cell testing system has a housing, and the substrate (1) is fixed inside the housing; the back-contact solar cell testing system also has a cleaning mechanism (9), which is disposed on the side of the turntable (42) away from the substrate (1) and connected to the housing, and the cleaning mechanism (9) cleans the side of the battery stage (424) away from the substrate (1); the cleaning mechanism (9) includes: Positioning frame (91); An air pipe (92) is provided on the side of the positioning frame (91) facing the turntable (42). The side of the air pipe (92) away from the turntable (42) is provided with a connecting nozzle that communicates with a second external air source. Multiple nozzles are provided at intervals along the axial direction of the side of the air pipe (92) facing the turntable (42).

3. The back-contact solar cell testing system as described in claim 2, characterized in that, The positioning frame (91) has two protrusions that are axially opposite to each other on the side facing the turntable (42); The axial direction of the air pipe (92) is perpendicular to the radial direction of the turntable (42), and both ends of the air pipe (92) are connected to the two protrusions by bolts.

4. The back-contact solar cell testing system as described in claim 1, characterized in that, The back-contact solar cell testing system also includes: The second telescopic member (8) is disposed on the side of the base plate (1) facing the turntable (42) and has the degree of freedom to extend and retract in the first direction. The second telescopic member (8) is opposite to the moving mechanism in the first direction.

5. The back-contact solar cell testing system as described in claim 1, characterized in that, The back-contact solar cell testing system also includes: An image recognition mechanism (6) is located on the side of the turntable (42) away from the substrate (1) and is connected to the substrate (1); The position correction mechanism (7) is electrically connected to the image recognition mechanism (6). The position correction mechanism (7) is disposed on the circumference of the turntable (42) between the image recognition mechanism (6) and the moving mechanism, or the position correction mechanism (7) is connected to the moving mechanism.

6. The back-contact solar cell testing system as described in claim 5, characterized in that, When the position correction mechanism (7) is disposed circumferentially between the image recognition mechanism (6) and the moving mechanism on the turntable (42), the position correction mechanism (7) includes: A support frame (71) is connected to the base plate (1) and located on the outer periphery of the turntable (42); The third drive unit (72) is disposed on the side of the support frame (71) facing the turntable (42) and has the degree of freedom to move along the first direction; A first correction platform (73) is disposed on the side of the turntable (42) away from the substrate (1) and connected to the third drive unit (72). A third suction cup is connected to the side of the first correction platform (73) facing the turntable (42). The first correction platform (73) is used to adjust the position of the third suction cup in a plane perpendicular to the first direction.

7. The back-contact solar cell testing system as described in claim 5, characterized in that, When the position correction mechanism (7) is connected to the moving mechanism, the position correction mechanism (7) includes: The second correction platform (74) is fixed to the substrate (1), and the moving mechanism is connected to the second correction platform (74); The second correction platform (74) is used to adjust the position of the moving mechanism in a plane perpendicular to the first direction.

8. The back-contact solar cell testing system as described in claim 1, characterized in that, The back-contact solar cell testing system also includes: Two sets of transport mechanisms (5) are distributed around the outer periphery of the turntable (42) and connected to the base plate (1). The transport mechanism (5) is spaced apart from the moving mechanism in the circumferential direction of the turntable (42). The two sets of transport mechanisms (5) are divided into a first mechanism and a second mechanism. The first mechanism is used to transport the back contact solar cell to the station of the turntable (42), and the second mechanism is used to remove the back contact solar cell from the station of the turntable (42).

9. The back-contact solar cell testing system as described in claim 8, characterized in that, The carrier mechanism (5) includes: The second drive unit (51) is connected to the substrate (1) and has a degree of freedom to rotate about the first direction; The first transport arm (52) is connected at one end to the second drive unit (51) and at the other end to the first suction cup.

10. The back-contact solar cell testing system as described in claim 8, characterized in that, The carrier mechanism (5) includes: A conveyor belt (53) is connected to the substrate (1); A linear motor (54) has a sliding guide rail (541) and a slider (542), one end of the guide rail (541) is located on the side of the turntable (42) away from the base plate (1), and the other end of the guide rail (541) is located on the side of the conveyor belt (53) away from the base plate (1). The second carrier arm (55) is connected to the slider (542) at one end and to the second suction cup at the other end.

Images