Back contact solar cell test system

Abstract

The invention 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 technical field of back contact solar cell testing, and particularly to a back contact solar cell testing system. Background Art

[0002] BC (Back Contact) solar cells integrate the PN junction and metal electrodes entirely on the back of the cell, eliminating the front electrode shading, maximizing the incident light absorption area, reducing optical losses, and improving the conversion efficiency. The core technology lies in the cross-finger PN partition design of the back electrode (alternating arrangement of P-type and N-type electrodes), which reduces the 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, enhancing the carrier collection efficiency.

[0003] Currently, the 0BB (Zero Busbar) technology reduces the silver consumption by eliminating the main busbar and gradually reducing the width of the fine grid lines (less than 20μm). The testing system needs to contact the fine grid lines on the back of the cell through a conductive device to complete the test. Due to the fine grid lines of 0BB or BC cells being less than 20μm wide and the densified PN regions, the conductive device must achieve precise full contact with the fine grid lines on the back of the cell.

[0004] When performing IV testing and EL (Electroluminesecence) testing on back contact solar cells, a light-transmitting support structure is adopted on the light-receiving surface to ensure uniform light reception and no mechanical damage on the light-receiving surface of the cell during the testing process.

[0005] In the existing back contact solar cell testing systems, flexible suction cups or other flexible materials are often used to support the solar cell. The conductive device passes through the support suction cup or flexible material to contact the grid lines or PAD points on the grid lines of the back contact solar cell and then lifts the back contact solar cell until it contacts the light-transmitting flat plate, clamping the back contact solar cell to collect electrical signals. During the process of lifting the back contact solar cell, displacement is likely to occur, resulting in deviation of the contact position and affecting the accuracy of the test results. Summary of the Invention

[0006] The main purpose of this application is to provide a back contact solar cell testing system, aiming to solve the problem that in the traditional back contact solar cell testing system during testing, the back contact solar cell is extremely prone to displacement, resulting in deviation of the contact position and affecting the accuracy of the test results.

[0007] To achieve the above object, the present application provides a back-contact solar cell testing system for testing back-contact solar cells. The back-contact solar cell testing system includes a substrate, a first driving part, 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 that are oppositely arranged in a first direction, and the first direction is the same as the thickness direction of the substrate; the first driving part is arranged on the side of the first side away from the second side; the turntable is connected to the side of the first driving part away from the substrate and its axis is the same as the first direction, and the turntable rotates around its own axis in response to the driving force of the first driving part. Among them, there are multiple hollow areas arranged around the turntable; the cell stages are correspondingly arranged in the hollow areas. Among them, the side of the cell stage away from the substrate is a flat structure, and multiple suction holes are arranged on the side of the cell stage away from the substrate to adsorb the back-contact solar cell, and the cell stage is made of an optically highly transparent material; the moving mechanism is arranged on the side of the turntable away from the substrate and is connected to the substrate, and the moving mechanism has a degree of freedom to move in the first direction; the conductive device is arranged at one end of the moving mechanism close to the turntable, and the conductive device moves in the first direction in response to the driving force of the moving mechanism to cooperate with the cell stage to clamp the back-contact solar cell; the test simulator is arranged on both sides of the turntable opposite to the conductive device and is electrically connected to the conductive device, and 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 in the housing; the back-contact solar cell testing system further has a cleaning mechanism, the cleaning mechanism is arranged on the side of the turntable away from the substrate and is connected to the housing, and the cleaning mechanism cleans the side of the cell stage away from the substrate; the cleaning mechanism includes a positioning frame and an air pipe, the air pipe is arranged on the side of the positioning frame facing the turntable, a connection nozzle communicating with a second external air source is arranged on the side of the air pipe away from the turntable, and multiple nozzles are arranged at intervals in the axial direction of the air pipe on the side of the air pipe facing the turntable.

[0009] Optionally, there are two protruding parts oppositely arranged in the axial direction of the air pipe on the side of the positioning frame facing the turntable; 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 protruding parts by bolts.

[0010] Optionally, the back-contact solar cell testing system further includes a second telescopic member, the second telescopic member is arranged on the side of the substrate facing the turntable and has a degree of freedom to expand and contract in the first direction, and 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 facing 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 between the image recognition mechanism and the moving mechanism in the circumferential direction of the turntable, or the position correction mechanism is connected to the moving mechanism.

[0012] Optionally, when the position correction mechanism is disposed between the image recognition mechanism and the moving mechanism in the circumferential direction of the turntable, the position correction mechanism includes a support frame, a third driving part, and a first correction platform. The support frame is connected to the substrate and is located on the outer periphery of the turntable; the third driving part 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 facing away from the substrate and is connected to the third driving part. A third suction cup is connected to the side of the first correction platform facing the turntable. Wherein, 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 substrate, 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 conveying mechanisms. The two sets of conveying mechanisms are distributed around the outer periphery of the turntable and are connected to the substrate. There is a gap between the conveying mechanism and the moving mechanism in the circumferential direction of the turntable; wherein, the two sets of conveying 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 working position of the turntable, and the second mechanism is used to remove the back-contact solar cell from the working position of the turntable.

[0015] Optionally, the conveying mechanism includes a second driving part and a first conveying arm. The second driving part is connected to the substrate and has a degree of freedom to rotate around the first direction; one end of the first conveying arm is connected to the second driving part, and the other end is connected with 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 sliding rail and a slider that are slidably matched. One end of the rail is located on the side of the turntable facing away from the substrate, and the other end of the rail is located on the side of the conveyor belt facing away from the substrate; one end of the second conveying arm is connected to the slider, and the other end is connected with a second suction cup.

[0017] A back-contact solar cell testing system proposed in an embodiment of the present application. The light-receiving surface of the back-contact solar cell is adsorbed and attached to the cell stage. The first driving part drives the turntable to rotate, driving the cell stages on each hollow area to sequentially pass between the conductive device and the substrate. When a cell stage is between the conductive device and the substrate, the moving mechanism drives the conductive device to approach the cell stage along the first direction and cooperate with the cell stage 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 stage facing away from the substrate has a flat structure, and the back-contact solar cell is supported on the cell stage, and the back-contact solar cell is laid flat, overcoming gravity deformation. The conductive device contacts the fine grid lines of the back-contact solar cell accurately, achieving full contact. Then, the test simulator shines light under the cell stage, and the light passes through the cell stage to reach the back-contact solar cell, thereby ensuring accurate test results. At the same time, the adsorption holes on the cell stage adsorb and fix the back-contact solar cell. Even if the conductive device contacts the fine grid lines of the back-contact solar cell to generate a certain contact force, the back-contact solar cell will not be displaced, reducing the position deviation of the contact between the conductive device and the back-contact solar cell, and ensuring the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic diagram of the overall structure when the position correction mechanism in a back-contact solar cell testing system proposed in an embodiment of the present application is not connected to the moving mechanism;

[0019] Figure 2 is Figure 1 a schematic diagram of the structure from another perspective in the embodiment of ;

[0020] Figure 3 is Figure 1 a schematic diagram of the structure at the moving mechanism in the embodiment of ;

[0021] Figure 4 is Figure 1 a schematic diagram of the structure at the turntable in the embodiment of ;

[0022] Figure 5 is Figure 1 a schematic diagram of the structure at the correction mechanism in the embodiment of ;

[0023] Figure 6 FIG. is a schematic diagram of the overall structure when the position correction mechanism in a back-contact solar cell testing system proposed in an embodiment of the present application is connected to the moving mechanism;

[0024] Figure 7 is Figure 6 a schematic diagram of the structure from another perspective in the embodiment of ;

[0025] Figure 8 isFigure 6 Schematic diagram of the structure at the support block in the middle embodiment;

[0026] Figure 9 is Figure 8 Schematic diagram of the structure from another perspective in the middle embodiment;

[0027] Figure 10 is Figure 6 Schematic diagram of the structure at the turntable in the middle embodiment;

[0028] Figure 11 is Figure 10 Schematic diagram of the structure from another perspective in the middle embodiment.

[0029] In the figure: 1, substrate; 11, support platform; 12, test simulator; 2, first telescopic member; 3, conductive device; 41, first driving part; 42, turntable; 421, connecting frame; 422, air slip ring fixing part; 423, air slip ring rotating part; 424, battery carrier; 425, air nozzle; 5, conveying mechanism; 51, second driving part; 52, first conveying arm; 53, conveyor belt; 54, linear motor; 541, guide rail; 542, slider; 55, second conveying arm; 6, image recognition mechanism; 7, position correction mechanism; 71, support frame; 72, third driving part; 73, first correction platform; 74, second correction platform; 8, second telescopic member; 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 described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0033] In the present invention, unless otherwise clearly specified or defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Reference Figures 1 to 11, an embodiment of the present 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 part 41, a turntable 42, a battery carrier 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 that are oppositely arranged in a first direction, and the first direction is the same as the thickness direction of the substrate 1; the first driving part 41 is arranged on the side of the first side facing away from the second side; the turntable 42 is connected to the side of the first driving part 41 facing away from the substrate 1 and its axis is the same as the first direction, and the turntable 42 rotates around its own axis in response to the driving force of the first driving part 41. Among them, there are multiple hollowed-out areas arranged around the turntable 42; the battery carriers 424 are correspondingly arranged in the hollowed-out areas. Among them, the side of the battery carrier 424 facing away from the substrate 1 is a flat structure, and multiple adsorption holes are arranged on the side of the battery carrier 424 facing away from the substrate 1 to adsorb the back-contact solar cell, and the battery carrier 424 is made of an optically highly transparent material; the moving mechanism is arranged on the side of the turntable 42 facing away from the substrate 1 and is connected to the substrate 1, and the moving mechanism has a degree of freedom to move in the first direction; the conductive device 3 is arranged at one end of the moving mechanism close to the turntable 42, and the conductive device 3 moves in the first direction in response to the driving force of the moving mechanism to cooperate with the battery carrier 424 to clamp the back-contact solar cell; the test simulator 12 is oppositely arranged on both sides of the turntable 42 with the conductive device 3 and is electrically connected to the conductive device 3, and the test simulator 12 is used to cooperate with the conductive device 3 to test the back-contact solar cell.

[0036] A back-contact solar cell testing system proposed in an embodiment of the present application. The light-receiving surface of the back-contact solar cell is adsorbed and attached to the battery stage 424. The first driving part 41 drives the turntable 42 to rotate, driving the battery stage 424 on each hollow area to pass between the conductive device 3 and the substrate 1 in sequence. When a battery stage 424 is between the conductive device 3 and the substrate 1, the moving mechanism drives the conductive device 3 to approach the battery stage 424 along the first direction and cooperate with the battery stage 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 battery stage 424 facing away from the substrate 1 is flat and has a structure. The back-contact solar cell is supported on the battery stage 424, and the back-contact solar cell is laid flat, overcoming gravity deformation. The conductive device 3 contacts the fine grid lines of the back-contact solar cell accurately. Then, the test simulator 12 emits light below the battery stage 424, and the light passes through the battery stage 424 to reach the back-contact solar cell, thereby ensuring the accuracy of the test results. At the same time, negative-pressure compressed air is introduced into the adsorption holes on the battery stage 424 to adsorb and fix the back-contact solar cell. Even if a certain contact force is generated when the conductive device 3 contacts the fine grid lines of the back-contact solar cell, the back-contact solar cell will not be displaced, reducing the position deviation of the contact between the conductive device 3 and the back-contact solar cell and ensuring the accuracy of the test results.

[0037] In addition, for the convenience of description, the case where the conductive device 3 contacts the fine grid lines on the back of the back-contact solar cell is taken as an example for description.

[0038] Furthermore, the battery stage 424 can also be a rigid structure. In this way, when the conductive device 3 and the battery stage 424 clamp the back-contact solar cell, the battery stage 424 hardly deforms, keeping the back-contact solar cell flat and in full contact with the conductive device 3.

[0039] As Figure 1 shown, the first direction is the X direction, that is, the thickness direction of the substrate 1 and also the height direction of the entire testing device. Among them, when the testing device is in use, the height direction of the testing device should be the same as the direction of gravity. For the convenience of description, it will be described later with the first direction being the same as the direction of gravity.

[0040] In addition, in some traditional solutions, two horizontally arranged and 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 the back-contact solar cell. The test fixture is divided into upper and lower parts. The conductive device is located below the back-contact solar cell, and the clamping part cooperating with the conductive device is located above the back-contact solar cell. During the test, the conductive device and the clamping part approach each other so that the conductive device lifts the back-contact solar cell to cooperate with the clamping part to clamp the back-contact solar cell. At this time, the back-contact solar cell is separated from the support rod, and the back-contact solar cell is in good contact with the conductive device, so as to conduct the test. During this process, the conductive device needs to avoid the support rod before it can jointly clamp the back-contact solar cell with the clamping part. This will cause an avoidance between the fine grid lines of the back-contact solar cell at the support rod and the conductive device, making the conductive device unable to fully contact each fine grid line on the back-contact solar cell, affecting the test effect.

[0041] In the embodiment of the present application, the battery stage 424 and the conductive device 3 are directly used to clamp the back-contact solar cell. During the movement of the conductive device 3, there is no need to avoid any mechanism, so that the conductive device 3 can fully contact the fine grid lines on the back-contact solar cell, and the test effect is better.

[0042] Furthermore, in the embodiment of the present application, the adsorption holes on the battery stage 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 cell can be adsorbed and fixed through the adsorption holes, which is convenient and fast. However, in the traditional solution, it is necessary to adjust the distance between the two support rods to adapt to back-contact solar cells of different sizes. After the distance between the two support rods is adjusted, the process of the conductive device avoiding the support rod also needs to be adjusted accordingly, and the operation is extremely complicated and inconvenient.

[0043] It should be understood that the housing (not shown in the figure) of the test device protects the components in the test device below.

[0044] Specifically, the first driving part 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 below the conductive device 3 in turn for testing. For the convenience of description, the hollow area can be regarded as a work station, and multiple hollow areas correspond to multiple work stations one by one.

[0045] It should be noted that the battery stage 424 is made of an optically highly transparent material, such as highly transparent glass. Thus, during the test, if the light-receiving surface of the back-contact solar cell needs to receive light, light can be irradiated from below the battery stage 424.

[0046] Specifically, the test simulator 12 can be electrically connected to the conductive device 3 to perform IV tests and EL tests on the back-contact solar cell. There are many existing solutions on how the test simulator 12 conducts tests, and no detailed description will be given here.

[0047] In addition, the light source can be integrated into the test simulator 12. In this way, the test simulator 12 can be arranged below the turntable 42, facilitating the irradiation of the back-contact solar cell by the light source for testing.

[0048] Among them, in the embodiment of the present application, there are a total of four workstations on the turntable 42. The four workstations are evenly distributed in a circumferential manner. Each workstation is detachably connected to the battery carrier 424 through bolts. The battery carrier 424 fully supports the back-contact solar cell, and at the same time, an adsorption structure is provided on the battery carrier 424 to adsorb and fix the back-contact solar cell thereon.

[0049] It should be noted that when the back-contact solar cell is located on the battery carrier 424, the light-receiving surface of the back-contact solar cell faces the battery carrier 424. In this way, when the conductive device 3 and the battery carrier 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] Reference Figure 1 and Figure 3 , in an exemplary embodiment, the back-contact solar cell test system may further include a support table 11, and the support table 11 is fixed on one side of the first side facing away from the second side; the moving mechanism may include a first telescopic member 2, and the first telescopic member 2 penetrates the support table 11 and extends along the first direction. The first telescopic member 2 has the freedom to expand and contract along the first direction; wherein, the conductive device 3 is arranged at one end of the first telescopic member 2 close to the substrate 1.

[0051] Among them, the first telescopic member 2 can be a first electric cylinder and can expand and contract along the first direction. The first electric cylinder has a first cylinder body and a first piston rod. The first cylinder body can be arranged on the side of the support table 11 facing away from the substrate 1. The first piston rod penetrates the support table 11, and the conductive device 3 is arranged at one end of the first piston rod away from the first cylinder body. In this way, 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 approaches the battery carrier 424, enabling the conductive device 3 to contact 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 contracts and the conductive device 3 is lifted, no longer clamping the back-contact solar cell.

[0052] Combined Figure 1 with Figure 3, on the side of the conductive device 3 facing away from the substrate 1, a guide rod extending in the first direction is provided. The guide rod penetrates through the support platform 11 and is slidably engaged with the support platform 11, so that the guide rod can slide and guide along 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] Reference Figure 3 , Figure 10 and Figure 11 , in an exemplary embodiment, the battery carrier 424 has a hollow area inside, and the hollow area communicates with the adsorption holes; the back-contact solar cell testing system may further include a connecting frame 421, an air slip ring fixing part 422, an air slip ring rotating part 423, and a nozzle 425. The connecting frame 421 is disposed on the side of the turntable 42 facing away from the substrate 1 and is fixed to the housing; the air slip ring fixing part 422 is fixed to one end of the connecting frame 421 close to the turntable 42, and the air slip ring fixing part 422 communicates with the first external air source; the air slip ring rotating part 423 is rotatably connected to one end of the air slip ring fixing part 422 away from the connecting frame 421 and has a degree of freedom of rotating around the first direction, and the air slip ring rotating part 423 is internally conducted with the air slip ring fixing part 422; the nozzles 425 are respectively disposed on the side of the battery carrier 424 close to the center of the turntable 42 and communicate with the corresponding hollow areas. Among them, each nozzle 425 is communicated with the air slip ring rotating part 423 through a valve.

[0054] Specifically, a plurality of adsorption holes distributed in a rectangular array are provided on the side of the battery carrier 424 facing away from the substrate 1, and a nozzle 425 is provided at a position of the battery carrier 424 close to the center of the turntable 42. Among them, the nozzle 425, the internal hollow area of the battery carrier 424, and the adsorption holes communicate with each other. In this way, when the back-contact solar cell covers the adsorption holes on the battery carrier 424, negative-pressure compressed air is introduced into the nozzle 425 to generate a vacuum, and the back-contact solar cell is adsorbed on the surface of the battery carrier 424. At this time, the back-contact solar cell and the battery carrier 424 are relatively stationary and will not be displaced due to external forces, ensuring the position determination of the fine grid lines of the back-contact solar cell. Therefore, when the conductive device 3 directly contacts the back-contact solar cell, the contact position is accurate.

[0055] In addition, a pneumatic slip ring rotating part 423 is fixed at the center of the side of the turntable 42 facing away from the substrate 1. A pneumatic slip ring fixing part 422 is rotatably connected to the side of the pneumatic slip ring rotating part 423 facing away from the turntable 42. The pneumatic slip ring fixing part 422 and the pneumatic slip ring rotating part 423 can rotate relative to each other in the first direction and are internally connected, enabling gas conduction. A connecting frame 421 is fixed to one end of the pneumatic slip ring fixing part 422 away from the pneumatic slip ring rotating part 423. The connecting frame 421 can be fixed to the housing of the testing device, that is, the connecting frame 421 is relatively fixed with respect to the substrate 1. Thus, the pneumatic slip ring fixing part 422 is relatively fixed with respect to the substrate 1. The pneumatic slip ring fixing part 422 can be connected to an external gas source, and the pneumatic slip ring rotating part 423 is connected to the air nozzles 425 on each battery carrier 424. In this way, even when the turntable 42 is rotating, negative-pressure compressed air can be introduced into the battery carrier 424 through the pneumatic slip ring fixing part 422 and the pneumatic slip ring rotating part 423 to adsorb the back-contact solar cell.

[0056] Further, an electric valve is provided on the pipeline connecting the pneumatic slip ring rotating part 423 and each air nozzle 425 to control whether to connect, so that whether the four battery carriers 424 adsorb the back-contact solar cell can be controlled separately.

[0057] Among them, the adsorption hole, the hollow area inside the battery carrier 424, and the air nozzle 425 constitute an adsorption structure. A set of adsorption structures can include a set of adsorption holes, the hollow area inside the battery carrier 424, and the air nozzle 425 cooperating 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 cooperating 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 cooperating, multiple back-contact solar cells can also be adsorbed, as long as the multiple back-contact solar cells cover all the adsorption holes within the corresponding adsorption structure.

[0059] Reference Figure 1 、 Figure 2 And 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. The cleaning mechanism 9 is arranged on the side of the turntable 42 facing away from the substrate 1 and is connected to the housing. The cleaning mechanism 9 cleans the side of the battery carrier 424 facing away from the substrate 1; the cleaning mechanism 9 can include a positioning frame 91 and an air pipe 92. The air pipe 92 is arranged on the side of the positioning frame 91 facing the turntable 42. A connection nozzle communicating with a second external gas source is arranged on the side of the air pipe 92 facing away from the turntable 42. A plurality of nozzles are arranged at intervals along the axial direction of the air pipe 92 on the side facing the turntable 42.

[0060] Specifically, after the back-contact solar cell is removed from the cell stage 424 upon completion of the test, the cleaning mechanism 9 can clean the impurities on the cell stage 424, avoiding the generation of debris due to the accumulation of impurities, so as to ensure the subsequent adsorption and support effects of the cell stage 424 on the back-contact solar cell.

[0061] As Figure 1 shown in Figure 2 , the cleaning mechanism 9 can be directly connected to the substrate 1, that is, connected to the housing through the substrate 1; of course, as Figure 10 shown in Figure 11 , the cleaning mechanism 9 can also be connected to the connecting frame 421, that is, connected to the housing through the connecting frame 421; the cleaning mechanism 9 cleans the cell stage 424 to remove the impurities on this cell stage 424, ensuring that this cell stage 424 can normally adsorb the back-contact solar cell.

[0062] Among them, one side of the air pipe 92 facing away from the turntable 42 is communicated with an external air source. The external air source injects high-pressure gas into the air pipe 92 and ejects it from the air nozzles 425 on the air pipe 92, blowing the impurities on the cell stage 424 away from the cell stage 424.

[0063] Referring to Figure 11 , in an exemplary embodiment, one side of the positioning frame 91 facing the turntable 42 has two protruding portions arranged oppositely in the axial direction of 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 protruding portions by bolts.

[0064] Specifically, both ends of the air pipe 92 are connected to the protruding portions by bolts. In this way, loosening the bolts can rotate the air pipe 92 around its axial direction, thereby adjusting the orientation of the nozzle to facilitate blowing the impurities out of the outer periphery of the turntable 42.

[0065] As Figure 11 shown, there are multiple air pipes 92 and they are distributed at intervals along the radial direction of the turntable 42. In this way, the effect of blowing the impurities by the multiple air pipes 92 is better.

[0066] In addition, the cleaning mechanism 9 may not be provided with the air pipe 92, but instead be provided with multiple brush rollers. The axial direction of the brush rollers is the same as the radial direction of the turntable 42, and the brush rollers are also arranged on the side of the positioning frame 91 facing the turntable 42. The brush rollers are rotatably connected to the positioning frame 91 and have the freedom to rotate around their own axial directions, and the brush rollers are in contact with the turntable 42. In this way, when the turntable 42 rotates, the brush rollers are also rotated by the frictional force of the turntable 42 to clean the cell stage 424.

[0067] Of course, as Figure 2As shown, the cleaning mechanism 9 can also be provided with only one baffle 93. A support structure is provided on the substrate 1, and the support structure is located on the outer periphery of the turntable 42. The baffle 93 is connected to the support structure and 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 move out of the turntable 42 due to the action of centrifugal force.

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

[0069] It should be understood that the cleaning mechanism 9 mainly cleans the battery carrier 424 to ensure that the battery carrier 424 can normally adsorb the back-contact solar cell. The side of the battery carrier 424 facing away from the substrate 1 is a planar structure. In this way, whether it is purging with the air pipe 92, cleaning with the roller brush, or blocking with the baffle 93, the cleaning mechanism 9 cooperates with the planar-structured battery carrier 424, and the cleaning effect is better.

[0070] Reference Figure 8 And Figure 9 , in an exemplary embodiment, the back-contact solar cell test system may further include a second telescopic member 8. The second telescopic member 8 is disposed on the side of the substrate 1 facing the turntable 42 and has a degree of freedom of telescoping along the 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 can be telescoped 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 disposed at one end of the second cylinder body close to the turntable 42. When the conductive device 3 moves downward until the conductive device 3 clamps the back-contact solar cell with the turntable 42, the second telescopic member 8 synchronously extends, so that the second piston rod abuts against the turntable 42, thereby supporting the turntable 42. And 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 forces to the turntable 42 on both sides of the turntable 42 respectively, so as to maintain the balance of the turntable 42 and prevent the turntable 42 from tilting under the pressure of the conductive device 3.

[0072] Such as Figure 8 And Figure 9 As shown, there are two second telescopic members 8 and they are arranged oppositely. The opposite direction is perpendicular to the radial direction of the corresponding position on the turntable 42 where the battery carrier 424 is located here and the first direction. The two second electric cylinders independently adjust the extension height of the second piston rods through their respective drives to ensure the balance of the supporting forces on both sides. In this way, the effect of preventing the turntable 42 from tilting is better.

[0073] In addition, such as Figure 9As shown in the figure, a support block 81 is provided at one end of the second piston rod away from the second cylinder block. A support column is provided on the side of the support block 81 facing away from the second piston rod. The end of the support column away from the support block 81 is designed to be spherical. In this way, when the second telescopic member 8 extends, the support column contacts the turntable 42 to support the turntable 42 in a point-contact manner. Such point-contact support has a better support effect, and there is no problem of poor contact effect caused by uneven contact surfaces.

[0074] Furthermore, multiple support columns with the same length in the first direction can also be provided on the same support block 81 to jointly support.

[0075] Reference Figures 1 to 3 , in an exemplary embodiment, the back-contact solar cell test system may further include two sets of carrier mechanisms 5. The two sets of carrier mechanisms 5 are distributed around the outer periphery of the turntable 42 and are connected to the substrate 1. There is a gap between the carrier mechanism 5 and the moving mechanism in the circumferential direction of the turntable 42; wherein, the two sets of carrier 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 on the turntable 42, and the second mechanism is used to remove the back-contact solar cell from the station on the turntable 42.

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

[0077] It should be understood that at this time, it is optimal to have three stations on the turntable 42, and the included angle between the connecting lines of the adjacent stations and the center of the turntable 42 is 120°. In this way, the included angle between the connecting lines of the adjacent two of the first mechanism, the second mechanism, and the conductive device 3 and the center of the turntable 42 is 120°; in this way, when one station is at the first mechanism, the other two stations are respectively below the conductive device 3 and at the second mechanism; in this way, the loading operation, the testing operation, and the unloading operation can be carried out simultaneously, and the turntable 42 rotates to drive each station to pass through the first mechanism, below the conductive device 3, and the second mechanism in turn; wherein, when the loading operation, the testing operation, and the unloading operation are carried out, the turntable 42 stops rotating.

[0078] Reference Figure 1 And Figure 2 , in an exemplary embodiment, the carrier mechanism 5 may include a second driving part 51 and a first carrier arm 52. The second driving part 51 is connected to the substrate 1 and has a degree of freedom of rotating around the first direction; one end of the first carrier arm 52 is connected to the second driving part 51, and the other end is connected with a first suction cup.

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

[0080] This is an embodiment of the carrying mechanism 5. If this embodiment is used as the first mechanism, when a work station moves from the second mechanism to the first mechanism, this work station is denoted as the first work station. At this time, no back-contact solar cell is placed on the first work station, and the first suction cup is in the initial position. The first carrying arm 52 drives the first suction cup to pick up an 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 faces downward. Then, the second motor drives the first carrying arm 52 to rotate, so that the first suction cup rotates above the first work station. At this time, the first suction cup releases the back-contact solar cell, and the back-contact solar cell falls on the battery carrier 424 at the first work station. The second motor drives the first suction cup to rotate back to the initial position, and the battery carrier 424 at the first work station adsorbs the back-contact solar cell, completing the loading operation.

[0081] Wherein, 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 has no projection along the first direction on the turntable 42.

[0082] If this embodiment is used as the second mechanism, when a work station moves from below the conductive device 3 to the second mechanism, this work station is denoted as the second work station. At this time, the first suction cup is in the initial position, and the second motor drives the first carrying arm 52 to rotate, so that the first suction cup rotates above the second work station. At this time, the battery carrier 424 at the second work station no longer adsorbs the back-contact solar cell, and the first suction cup picks up the back-contact solar cell. Then, the second motor drives the first suction cup to rotate back to the initial position, and the back-contact solar cell can be transported to the subsequent process, completing the unloading operation.

[0083] Reference Figure 1 And Figure 2 In an exemplary embodiment, the carrying mechanism 5 may include a conveyor belt 53, a linear motor 54, and a second carrying arm 55. The conveyor belt 53 is connected to the substrate 1; the linear motor 54 has a guide rail 541 and a slider 542 that are slidably engaged. 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 carrying arm 55 is connected to the slider 542, and the other end is connected with 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 embodiment of the carrier mechanism 5. If this embodiment is used as the first mechanism, when a work station moves from the second mechanism to the first mechanism, this work station is denoted as the third work station. At this time, no back-contact solar cell is placed on the third work station. The conveyor belt 53 conveys the back-contact solar cell to the outer periphery of the turntable 42, with the light-receiving surface of the back-contact solar cell facing 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, causing the second suction cup to move above the third work station. The second suction cup releases the back-contact solar cell, and the back-contact solar cell falls onto the battery carrier 424 at the third work station. Then, the slider 542 slides along the guide rail 541, causing the second suction cup to move back to the initial position. The battery carrier 424 at the third work station adsorbs the back-contact solar cell, completing the loading operation.

[0086] Among them, when the second suction cup is in the initial position, the second suction cup is located above the conveyor belt 53.

[0087] If this embodiment is used as the second mechanism, when a work station moves from below the conductive device 3 to the second mechanism, this work station is denoted as the fourth work station. The slider 542 slides along the guide rail 541, causing the second suction cup to move above the fourth work station. At this time, the battery carrier 424 at the fourth work station no longer adsorbs the back-contact solar cell. 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 adsorbs or releases the back-contact solar cell on the conveyor belt 53, the conveyor belt 53 should be in a stopped state of movement to prevent wear on the back-contact solar cell.

[0089] In addition, either the first mechanism or the second mechanism can adopt the solution in Embodiment 1 or Embodiment 2. In this way, the first mechanism and the second mechanism can adapt to more usage scenarios.

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

[0091] Reference Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 7 In an exemplary embodiment, the back-contact solar cell test 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 facing 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 between the first mechanism and the moving mechanism in the circumferential direction of the turntable 42, or the position correction mechanism 7 is connected to the moving mechanism.

[0092] Wherein, when the first mechanism transports the back-contact solar cell to a work station, the image recognition mechanism 6 is opposite to this work station in the first direction; thus, the position of the image recognition mechanism 6 can also be understood as the position of the first mechanism.

[0093] Specifically, when the first mechanism transports the back-contact solar cell to a work station, the image recognition mechanism 6 is opposite to the corresponding work station in the first direction. In this way, the image recognition mechanism 6 can identify the position of the 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 the standard position, and the standard position information is set at the position correction mechanism 7. The position correction mechanism 7 corrects the device to compare the position information of the battery wafer transmitted by the image recognition mechanism 6 with the set standard position information. If the position correction mechanism 7 is arranged 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 to make the back-contact solar cell reach the standard position, so that when the subsequent conductive device 3 clamps the back-contact solar cell, the conductive device 3 can be in full contact with the fine grid lines on the non-light-receiving surface of the back-contact solar cell, preventing a position deviation between the back-contact solar cell and the conductive device 3 and ensuring the test effect. If the position correction mechanism 7 is connected to the moving mechanism, the position correction mechanism 7 adjusts the position of the moving mechanism to move the conductive device 3 from the standard position to the position consistent with the back-contact solar cell. In this way, when the back-contact solar cell moves below the conductive device 3, there will be no position deviation between the back-contact solar cell and the conductive device 3, and the conductive device 3 can move downward to be in full contact with the fine grid lines on the non-light-receiving surface of the back-contact solar cell, ensuring the test effect.

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

[0095] In addition, in combination with Figure 1 、 Figure 2 and Figure 5, at this time, the position correction mechanism 7 is arranged between the image recognition mechanism 6 and the moving mechanism; then at this time, it is best when there are four workstations on the turntable 42, and the angle between the adjacent workstations and the center line of the turntable 42 is 90°, so that the angle between the lines connecting the 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°; in this way, when one workstation is at the first mechanism, the other three workstations are respectively at the position correction mechanism 7, under the conductive device 3, and at the second mechanism; in this way, the loading operation, the position correction operation, the test operation and the unloading operation can be carried out simultaneously, and the rotation of the turntable 42 drives each workstation to pass through the first mechanism, the position correction mechanism 7, under the conductive device 3 and the second mechanism in turn; wherein, when the loading operation, the position correction operation, the test operation and the unloading operation are performed, the turntable 42 stops rotating.

[0096] When the position correction mechanism 7 is connected to the moving mechanism, the stations on the turntable 42 can still adopt the design scheme of the above three stations; in the embodiment of the present application, Figure 6 and Figure 7 As shown, a four-station design is adopted here, and the angle between adjacent stations and the center line 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 between the first mechanism and the second mechanism, so that the angle between the first mechanism and the conductive device 3 and the center line of the turntable 42 is 90°.

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

[0098] Specifically, the cleaning mechanism 9 can clean the battery carrier 424 after passing through the second mechanism to remove impurities on the battery carrier 424, ensuring that the battery carrier 424 can normally 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 arranged between the first mechanism and the moving mechanism, the turntable 42 rotates to drive each workstation 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 arranged opposite to the conductive device 3, so that the angle between the cleaning mechanism 9 and the first mechanism and the line connecting the center of the turntable 42 is 90°. The rotation of the turntable 42 drives each workstation 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.

[0101] Reference 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 driving part 72, and a first correction platform 73. The support frame 71 is connected to the substrate 1 and is located on the outer periphery of the turntable 42. The third driving part 72 is disposed on the side of the support frame 71 facing the turntable 42 and has a degree of freedom of moving in a first direction. The first correction platform 73 is disposed on the side of the turntable 42 facing away from the substrate 1 and is connected to the third driving part 72. A third suction cup is connected to the side of the first correction platform 73 facing the turntable 42. Wherein, 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] Wherein, the third driving part 72 may be a third electric cylinder, which can extend and retract in the first direction. The third driving part 72 drives the first correction platform 73 to move in the first direction. The plane perpendicular to the first direction is denoted as the adjustment plane.

[0103] When the position correction mechanism 7 is disposed between the first mechanism and the moving mechanism in the circumferential direction of the turntable 42, and the back-contact solar cell moves to the position correction mechanism 7 in a back-contact manner, the third suction cup is located above the back-contact solar cell. The third driving part 72 drives the first correction platform 73 and the third suction cup to move downward until the third suction cup fits the back-contact solar cell. At this time, the battery stage 424 no longer adsorbs the back-contact solar cell, and the third suction cup adsorbs the back-contact solar cell. Then, the third driving part 72 drives the first correction platform 73 and the back-contact solar cell to move upward. The first correction platform 73 adjusts the position of the third suction cup in the adjustment plane. After the adjustment is completed, the third driving part 72 drives the first correction platform 73 and the third suction cup to move downward until the back-contact solar cell fits the battery stage 424. At this time, the third suction cup no longer adsorbs the back-contact solar cell, and the battery stage 424 adsorbs the back-contact solar cell. In this way, the back-contact solar cell can be in a standard position.

[0104] It should be noted that the first correction platform 73 is the same as the subsequent second correction platform 74, and both include three driving motors, which are arranged on three sides of a square in the adjustment plane. The extending direction of the motor shaft is the same as the direction of the side of the square, and the position of the adjustment target in the adjustment plane can be realized. Moreover, the number of rotation turns of the three driving motors is different, and the angle of rotation of the adjustment target around the first direction can be adjusted. There are many existing solutions for the specific correction platform. This is only an example here and is not specifically limited.

[0105] Reference Figures 6 to 9, in 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. The second correction platform 74 is fixed to the substrate 1, and the moving mechanism is connected to the second correction platform 74. Among them, 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, as Figure 6 shown, the second correction platform 74 may also be fixed to the substrate 1 through 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 consistent with the back-contact solar cell in the adjustment plane. In this way, when the back-contact solar cell moves to the lower part of the conductive device 3, there will be no position 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 to completely 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 only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A back contact solar cell testing system, characterized in that: Used for testing back-contact solar cells, the back-contact solar cell testing system comprises: A substrate (1) having a first side surface and a second side surface arranged opposite to each other in a first direction, wherein the first direction is the same as a thickness direction of the substrate (1); A first driving portion (41) is arranged on a side of the first side facing away from the second side; a turntable (42), connected to a side of the first driving part (41) away from the substrate (1) and having an axial direction in the same direction as the first direction, the turntable (42) rotating around its own axial direction in response to a driving force of the first driving part (41), wherein a plurality of hollow areas are arranged around the turntable (42); The battery carriers (424) are arranged in a one-to-one correspondence in the hollow area, wherein the side of the battery carrier (424) facing away from the substrate (1) is a flat structure, and the side of the battery carrier (424) facing away from the substrate (1) is provided with a plurality of adsorption holes for adsorbing the back contact solar cell, and the battery carrier (424) is made of an optically highly light-transmitting material; A moving mechanism, arranged on a side of the turntable (42) away from the substrate (1) and connected to the substrate (1), the moving mechanism having a degree of freedom to move along the first direction; A conductive device (3) is arranged at one end of the moving mechanism close to the rotating disk (42), and the conductive device (3) moves in the first direction in response to the driving force of the moving mechanism to cooperate with the battery carrier (424) to clamp the back-contact solar cell; A test simulator (12) is arranged on both sides of the turntable (42) opposite to the conductive device (3) 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 cell.

2. The back contact solar cell testing system according to claim 1, characterized in that: The back-contact solar cell testing system comprises a shell, and the substrate (1) is fixed in the shell; the back-contact solar cell testing system further comprises a cleaning mechanism (9), the cleaning mechanism (9) is arranged on a side of the rotating disk (42) away from the substrate (1) and connected to the shell, and the cleaning mechanism (9) cleans a side of the cell carrier (424) away from the substrate (1); the cleaning mechanism (9) comprises: Positioning frame (91); The air pipe (92) is arranged on the side of the positioning frame (91) facing the turntable (42), and a connecting nozzle connected to a second external air source is arranged on the side of the air pipe (92) facing away from the turntable (42). A plurality of nozzles are arranged at intervals in the axial direction of the air pipe (92) on the side of the air pipe (92) facing the turntable (42).

3. The back contact solar cell testing system according to claim 2, characterized in that: The side of the positioning frame (91) facing the rotating disk (42) has two protrusions arranged opposite to each other in the axial direction of the air pipe (92); The axial direction of the air pipe (92) is perpendicular to the radial direction of the rotating disk (42), and both ends of the air pipe (92) are connected to the two protruding parts by bolts.

4. The back contact solar cell testing system according to claim 1, characterized in that: The back contact solar cell testing system also includes: A second telescopic member (8) is arranged on a side of the substrate (1) facing the turntable (42) and has the freedom to telescope along a 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 according to claim 1, characterized in that: The back contact solar cell testing system also includes: An image recognition mechanism (6) is located on a side of the rotating disk (42) facing away from the substrate (1) and is connected to the substrate (1); A position correction mechanism (7) is electrically connected to the image recognition mechanism (6); the position correction mechanism (7) is arranged between the image recognition mechanism (6) and the moving mechanism in the circumferential direction of the turntable (42), or the position correction mechanism (7) is connected to the moving mechanism.

6. The back contact solar cell testing system according to claim 5, characterized in that: When the position correction mechanism (7) is arranged between the image recognition mechanism (6) and the moving mechanism in the circumferential direction of the rotating disk (42), the position correction mechanism (7) comprises: A support frame (71) connected to the base plate (1) and located on the outer periphery of the rotating disk (42); A third driving part (72), arranged on a side of the support frame (71) facing the turntable (42) and having the freedom to move along the first direction; A first correction platform (73) is arranged on a side of the turntable (42) facing away from the substrate (1) and is connected to the third driving unit (72); a third suction cup is connected to the side of the first correction platform (73) facing the turntable (42), wherein 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 according to claim 5, characterized in that: When the position correction mechanism (7) is connected to the moving mechanism, the position correction mechanism (7) comprises: A second correction platform (74) 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.

8. The back contact solar cell testing system according to claim 1, characterized in that: The back contact solar cell testing system also includes: Two groups of transport mechanisms (5) are distributed around the outer circumference of the turntable (42) and connected to the base plate (1), and there is a gap between the transport mechanism (5) and the moving mechanism in the circumferential direction of the turntable (42); The two groups of transport mechanisms (5) are divided into a first mechanism and a second mechanism, wherein 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).

9. The back contact solar cell testing system according to claim 8, characterized in that: The carrying mechanism (5) comprises: A second driving part (51), connected to the substrate (1) and having a degree of freedom to rotate about the first direction; The first carrying arm (52) has one end connected to the second driving part (51) and the other end connected to a first suction cup.

10. The back contact solar cell testing system according to claim 8, characterized in that: The carrying mechanism (5) comprises: A conveyor belt (53) connected to the substrate (1); A linear motor (54) having a guide rail (541) and a slider (542) that are slidably matched, one end of the guide rail (541) being located on a side of the turntable (42) away from the base plate (1), and the other end of the guide rail (541) being located on a side of the conveyor belt (53) away from the base plate (1); The second carrying arm (55) has one end connected to the slider (542) and the other end connected to a second suction cup.

Images