Solar cell testing device

Abstract

The utility model provides a solar cell testing device comprising a feeding mechanism comprising a first sub-feeding mechanism and a second sub-feeding mechanism, the first sub-feeding mechanism is used for conveying a solar cell to the second sub-feeding mechanism along a first direction, and the second sub-feeding mechanism is used for conveying the solar cell to the second sub-feeding mechanism along a second direction; the second sub-feeding mechanism is used for moving the solar cells to the first specific position in the second direction, the first direction is perpendicular to the second direction, and the second direction is perpendicular to the plane where the solar cells are located. And the rotary table mechanism comprises a plurality of fixing discs, and each fixing disc is used for adsorbing and fixing the solar cell at the first specific position and rotationally moving the fixed solar cell to a second specific position. And the testing mechanism is used for testing the solar cell at the second specific position. According to the testing device disclosed by the invention, the number of times of adsorbing the battery piece by adopting a sucking disc is reduced, and meanwhile, the battery piece is adsorbed by adopting an upper adsorption mode, so that adsorption errors and abrasion to an adsorption surface are reduced, and the testing precision of the solar battery piece is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of solar cell testing, and particularly relates to a solar cell testing device. BACKGROUND

[0002] IV (current-voltage) testing and EL (Electroluminescence) testing of a solar cell are key means for evaluating its electrical performance and internal quality.

[0003] The current testing device mainly uses a suction cup to transfer the solar cell to the testing platform in a suction manner, and the whole process involves multiple times of vacuum suction and vacuum breaking, and the structure is complex. In addition, when the solar cell is adsorbed, a slight deviation is caused, which increases the measurement error. In addition, a support is used to support the solar cell, and the testing platform contacts the solar cell multiple times, which causes the testing platform to be worn and reduces the light transmittance, further increasing the measurement error. UTILITY MODEL CONTENT

[0004] In view of the above problems, an embodiment of the present disclosure provides a solar cell testing device.

[0005] One aspect of the present disclosure provides a solar cell testing device, comprising: a feeding mechanism, comprising a first sub-feeding mechanism and a second sub-feeding mechanism, the first sub-feeding mechanism being configured to transmit the solar cell to the second sub-feeding mechanism along a first direction, and the second sub-feeding mechanism being configured to move the solar cell to a first specific position along a second direction, the first direction being perpendicular to the second direction, and the second direction being perpendicular to a surface on which the solar cell is located; a turntable mechanism, comprising a plurality of fixed discs, each fixed disc being configured to adsorb and fix the solar cell at the first specific position, and rotate and move the fixed solar cell to a second specific position; and a testing mechanism, configured to test the solar cell at the second specific position.

[0006] According to the embodiment of the present disclosure, the feeding mechanism further comprises a baffle, the baffle being arranged at one end of the first sub-feeding mechanism close to the second sub-feeding mechanism, so as to limit the transmission of the solar cell by the first sub-feeding mechanism.

[0007] According to the embodiment of the present disclosure, the first sub-feeding mechanism comprises a plurality of conveying belts arranged in parallel along the first direction, each conveying belt comprises one or more segments which are independently controlled to start and stop, and the number of segments of each conveying belt corresponds.

[0008] According to the embodiment of the present disclosure, the number of the conveying belts is 2 or 4.

[0009] According to the embodiment of the present disclosure, a surface of the second sub-feeding mechanism in contact with the solar cell is provided with a flexible material, so as to provide a buffer when the solar cell contacts the fixed disc.

[0010] According to an embodiment of the present disclosure, a plurality of air passages are arranged in the fixing disc, and the plurality of air passages are respectively communicated with a plurality of air holes arranged on the side of the fixing disc close to the second sub-feeding mechanism, so as to form vacuum negative pressure at the plurality of air holes to adsorb and fix the solar cell.

[0011] According to an embodiment of the present disclosure, a plurality of grooves are arranged on the side of the fixing disc close to the second sub-feeding mechanism, and a suction disc is arranged in each groove, and the height of the suction disc in the groove is less than or equal to the depth of the groove, and the suction disc is used to provide vacuum negative pressure to adsorb and fix the solar cell.

[0012] According to an embodiment of the present disclosure, the number of the plurality of fixing discs is 2-4, and the plurality of fixing discs are symmetrically distributed about at least one of the first direction and the third direction, and the third direction is perpendicular to the first direction and the second direction.

[0013] According to an embodiment of the present disclosure, the material of the fixing disc is a transparent material, and the material of the fixing disc includes glass and plastic.

[0014] According to an embodiment of the present disclosure, the solar cell testing device further comprises a positioning camera arranged at any one or more of the second sub-feeding mechanism and the testing mechanism, and the positioning camera is used to take a photo of the solar cell fixed on the side of the fixing disc.

[0015] According to an embodiment of the present disclosure, the number of the positioning cameras corresponding to each solar cell is 2-4.

[0016] According to an embodiment of the present disclosure, the testing mechanism comprises a plurality of probes, and the plurality of probes are used to apply voltage to the solar cell when in contact with the solar cell. In the case that the grid lines of the solar cell have a positional deviation from the plurality of probes, the plurality of probes move a compensation distance in at least one of the first direction and the third direction, and then move along the second direction and come into contact with the solar cell, the third direction is perpendicular to the first direction and the second direction, and the compensation distance is determined based on the positioning result of the positioning camera.

[0017] According to an embodiment of the present disclosure, the solar cell testing device further comprises a discharging mechanism arranged on the opposite side of the feeding mechanism or the testing mechanism. When the projection positions of the fixing disc and the discharging mechanism on the surface where the solar cell is located coincide, the distance between the discharging mechanism and the fixing disc is less than or equal to a preset threshold, and the discharging mechanism is used to receive the solar cell released by the fixing disc.

[0018] According to the embodiment of the present disclosure, the solar cell wafer is directly transmitted to the lower side of the fixed disc by the first sub-feeding mechanism, and then the second sub-feeding mechanism lifts the solar cell wafer to the first specific position close to the fixed disc, which is simple and direct in structure, and reduces the number of times of using the suction cup to adsorb the solar cell wafer. At the same time, the fixed disc uses the upper adsorption mode to adsorb the solar cell wafer, and the test of the solar cell wafer can be realized after adsorption once, which reduces the contact times of the solar cell wafer and the fixed disc, and improves the test precision of the solar cell wafer. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1A A top view structural diagram of a solar cell wafer testing device according to an embodiment of the present disclosure is schematically shown; Figure 1B A side view structural diagram of the solar cell wafer testing device along the D-D section according to an embodiment of the present disclosure is schematically shown; Figure 1C A perspective view structural diagram of the solar cell wafer testing device according to an embodiment of the present disclosure is schematically shown.

[0021]

BRIEF DESCRIPTION OF DRAWINGS

[0022] 1-feeding mechanism; 11-first sub-feeding mechanism; 111-conveyer belt; 12-second sub-feeding mechanism; 2-rotary table mechanism; 21-fixed disc; 3-testing mechanism; 4-positioning camera. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0024] It should be noted that in the drawings or the description of the specification, similar or identical parts are denoted by the same reference numerals. The technical features in the example embodiments in the specification can be freely combined without conflict to form new solutions, and each claim can be used as an embodiment alone or the technical features in the claims can be combined as a new embodiment. In the drawings, the shape or thickness of the embodiments can be exaggerated and simplified for the purpose of illustration and convenience. Furthermore, elements or implementation manners not shown or described in the drawings are in the form known to those skilled in the art. In addition, although this document can provide examples of parameters including specific values, it should be understood that the parameters do not need to be exactly equal to the corresponding values, but can be approximately equal to the corresponding values within an acceptable error tolerance or design constraint.

[0025] Unless there is a technical barrier or contradiction, the various embodiments of the present disclosure described above can be freely combined to form additional embodiments, all of which are within the scope of protection of the present disclosure.

[0026] Although the present disclosure is illustrated in conjunction with the drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present disclosure, and cannot be understood as a limitation of the present disclosure. The dimensional proportions in the drawings are merely schematic, and cannot be understood as a limitation of the present disclosure.

[0027] Although some embodiments of the present general inventive concept have been shown and described, it would be understood by those of ordinary skill in the art that changes might be made therein without departing from the principles and spirit of the general inventive concept, the scope of which is defined by the claims and their equivalents.

[0028] Figure 1A A top view structural diagram of a solar cell testing device according to an embodiment of the present disclosure is schematically shown. Figure 1B A side view structural diagram of a solar cell testing device according to an embodiment of the present disclosure along a D-D section is schematically shown. Figure 1C A perspective view structural diagram of a solar cell testing device according to an embodiment of the present disclosure is schematically shown.

[0029] According to an embodiment of the present disclosure, as shown in Figure 1A , Figure 1B and Figure 1C , the present disclosure provides a solar cell testing device, comprising: a feeding mechanism 1, comprising a first sub-feeding mechanism 11 and a second sub-feeding mechanism 12, the first sub-feeding mechanism 11 being configured to transmit solar cells along a first direction x to the second sub-feeding mechanism 12, the second sub-feeding mechanism 12 being configured to move the solar cells to a first specific position along a second direction y, the first direction x being perpendicular to the second direction y, and the second direction y being perpendicular to the plane on which the solar cells lie. A turntable mechanism 2, comprising a plurality of fixed disks 21, each fixed disk 21 being configured to adsorb and fix the solar cells at the first specific position, and rotate and move the fixed solar cells to a second specific position. A testing mechanism 3, configured to test the solar cells at the second specific position.

[0030] In some embodiments, the feeding mechanism is composed of two parts: the first sub-feeding mechanism and the second sub-feeding mechanism.

[0031] The first sub-feeding mechanism is responsible for smoothly transmitting the solar cells along a specific first direction (e.g. horizontal direction). This direction is pre-set to move the solar cells from the initial position to the intersection point with the second sub-feeding mechanism.

[0032] For example, the first sub-feeding mechanism can be implemented by a conveyor belt, a roller or other similar horizontal transmission mechanism.

[0033] The second sub-feeding mechanism receives the solar cell pieces from the first sub-feeding mechanism and moves the cell pieces along a second direction perpendicular to the first direction. The second direction is perpendicular to the plane in which the solar cell pieces are located, indicating that the second sub-feeding mechanism has the ability to vertically lift the cell pieces.

[0034] For example, the second sub-feeding mechanism can be a jacking cylinder. The jacking cylinder is located at the end of the first sub-feeding mechanism, and its piston rod can move vertically upward. When the first sub-feeding mechanism transmits the cell pieces to the position opposite the jacking cylinder, the piston rod of the jacking cylinder extends to lift the cell pieces from the horizontal position to the first specific position connected to the turntable mechanism.

[0035] The turntable mechanism includes a plurality of fixed discs designed to adsorb and fix the solar cell pieces at the first specific position, i.e., the terminal position of the second sub-feeding mechanism lifting the cell pieces. For example, the solar cell pieces can be adsorbed by vacuum suction cups.

[0036] After the cell pieces are fixed, the turntable mechanism starts to rotate and move the fixed cell pieces to the second specific position. This rotation and movement process is to enable the cell pieces to be aligned with the test mechanism in the correct posture and position for subsequent testing work.

[0037] The test mechanism is located at the second specific position of the turntable mechanism, and when the cell pieces are rotated and moved to this position, the test mechanism starts to test the cell pieces. The test content can include the electrical performance of the cell pieces (such as open circuit voltage, short circuit current, conversion efficiency, etc.), physical characteristics (such as size, thickness, appearance, internal defects, etc.) or other related parameters, depending on the design purpose and use of the test device.

[0038] The device of the embodiment transmits the cell pieces from the initial position to the preparation position before testing by the feeding mechanism, then rotates and moves the cell pieces to the test position by the turntable mechanism, and finally tests the cell pieces by the test mechanism. In the whole process, the number of adsorptions of the solar cell pieces is small, the positional deviation when the cell pieces are transferred is reduced, at the same time, the number of contacts between the solar cell pieces and the fixed disc is small, the wear of the fixed disc is reduced, and the efficient and accurate testing of the solar cell pieces is realized.

[0039] According to the embodiment of the present disclosure, the feeding mechanism 1 further comprises a baffle, which is arranged at one end of the first sub-feeding mechanism 11 close to the second sub-feeding mechanism 12 to limit the transmission of the first sub-feeding mechanism 11 to the solar cell pieces.

[0040] In some embodiments, the first sub-feeding mechanism is, for example, a conveyor belt, and the second sub-feeding mechanism is, for example, a lifting cylinder. The plane on which the conveyor belt is located is slightly higher than the upper end surface of the lifting cylinder, preventing the solar cell from being collided by the lifting cylinder during the conveying process, so that the solar cell can be smoothly transmitted from the first sub-feeding mechanism to the second sub-feeding mechanism.

[0041] At one end of the first sub-feeding mechanism (i.e., the conveyor belt) close to the second sub-feeding mechanism (i.e., the lifting cylinder), a baffle is arranged. The baffle functions to limit the transmission of the solar cell by the first sub-feeding mechanism. When the solar cell is transmitted by the first sub-feeding mechanism to a position opposite to the lifting cylinder, the baffle will prevent the solar cell from moving forward, ensuring that the solar cell can be accurately stopped above the lifting cylinder. In this way, when the piston rod of the lifting cylinder is extended, the solar cell can be accurately lifted.

[0042] Through the arrangement of the baffle, the accuracy of the solar cell during the transmission process is ensured. The baffle can prevent the solar cell from moving excessively on the first sub-feeding mechanism, thereby ensuring that the solar cell can be accurately stopped above the lifting cylinder, avoiding the deviation or falling of the solar cell during the transmission process.

[0043] Due to the cooperation of the baffle and the lifting cylinder, the transmission process of the solar cell from the first sub-feeding mechanism to the second sub-feeding mechanism is simplified and efficient. The operator does not need to manually adjust the position of the solar cell or perform additional fixing operations to achieve smooth transmission of the solar cell.

[0044] The arrangement of the baffle also enhances the stability of the entire feeding mechanism. During the transmission of the solar cell, the baffle can provide a stable support point to prevent the solar cell from shaking or tilting due to external forces, thereby ensuring the stability and reliability of the entire testing device.

[0045] The present embodiment optimizes the design of the feeding mechanism, improves the accuracy and efficiency of the solar cell transmission, and enhances the stability of the equipment.

[0046] According to the embodiments of the present disclosure, as shown in Figure 1A The first sub-feeding mechanism 11 includes a plurality of conveyor belts 111 arranged in parallel along the first direction x. Each conveyor belt 111 includes one or more segments that are independently controlled to start and stop, and the number of segments of each conveyor belt 111 corresponds.

[0047] In some embodiments, the first sub-feeding mechanism is composed of a plurality of conveyor belts arranged in parallel along the first direction (e.g., the horizontal direction). These conveyor belts can be synchronous belts, chain plate belts, or other types of conveyor belts, which are used to transmit the solar cell from the initial position to the position opposite to the second sub-feeding mechanism (e.g., the lifting cylinder). Two adjacent conveyor belts form a transmission channel for the solar cell.

[0048] Each conveying belt is designed to include one or more segments, which can be independently controlled to start and stop. The operator can flexibly start or stop a certain segment or several segments of the conveying belt according to actual needs, so as to realize the accurate transmission of the battery piece at different positions.

[0049] In order to ensure that the battery piece can be smoothly transferred from a certain segment of the conveying belt to the adjacent segment, the number of segments of the adjacent conveying belts transporting the same battery piece needs to be corresponding. That is, when a certain segment of a conveying belt stops, the corresponding segment of the adjacent conveying belt also stops, so as to avoid the position deviation of the battery piece during the transmission.

[0050] By adopting a plurality of parallel conveying belts and allowing the number of segments of each conveying belt to be independently controlled to start and stop, the feeding mechanism of the embodiment provides higher transmission flexibility. The operator can flexibly adjust the running speed and start-stop position of the conveying belt according to actual needs, so as to realize the accurate transmission of the battery piece at different positions and the parallel transmission of a plurality of solar cell pieces or solar cell halves.

[0051] Since the conveying belt can be independently controlled to start and stop, when there is no battery piece on a certain conveying belt, the running of the conveying belt can be stopped to save energy and reduce wear. At the same time, when a large number of battery pieces need to be transmitted, a plurality of conveying belts can be started to run at the same time to improve the transmission efficiency.

[0052] The embodiment optimizes the design of the feeding mechanism, improves the flexibility and efficiency of the battery piece transmission, and enhances the adaptability of the equipment.

[0053] Optionally, the number of conveying belts is 2 or 4.

[0054] For example, there are 4 parallel conveying belts, which can form two transmission channels of solar cell pieces to realize the parallel transmission of two halves of solar cells at the same time. Further, the two halves of solar cells can be positionally compensated at the second specific position by two independent positioning mechanisms, so as to avoid the measurement error caused by the unfixed relative position of the two halves of solar cells.

[0055] According to the embodiment of the present disclosure, the surface of the second sub-feeding mechanism 12 in contact with the solar cell piece is provided with a flexible material to provide buffering when the solar cell piece contacts the fixing disc 21.

[0056] In some embodiments, the second sub-feeding mechanism is specially designed. Its main part can still be a jacking cylinder or other similar lifting mechanism, but the key is that the surface in contact with the battery piece is provided with a flexible material. This flexible material can be rubber, silicone or other materials with high elasticity and wear resistance, used to provide cushioning when the battery piece contacts the fixed disc, reducing damage to the battery piece due to direct impact.

[0057] The selection of flexible material should take into account its elasticity, wear resistance and compatibility with the surface of the battery piece. Ensure that the flexible material can maintain good cushioning effect during long-term use and will not scratch or damage the surface of the battery piece.

[0058] The flexible material can be fixed on the contact surface of the second sub-feeding mechanism by pasting, inlaying or other methods. When installing, ensure that the flexible material is flat, bubble-free and has a large enough contact area with the battery piece to provide sufficient cushioning effect.

[0059] Since the flexible material may be worn or aged during use, it needs to be regularly inspected and maintained. Once the flexible material is found to be damaged or its elasticity is reduced, it should be replaced in time to ensure its cushioning effect.

[0060] The fixed disc is used to adsorb and fix the solar cell piece at a first specific position, i.e., the position where the second sub-feeding mechanism releases the battery piece.

[0061] When the battery piece is in this first specific position, it can have a short preset distance from the fixed disc, so that the battery piece does not have to directly contact the fixed disc to cause damage, while minimizing the positional deviation caused during the adsorption of the battery piece. It can also be in direct contact with the fixed disc, at which time the flexible material in this embodiment can produce a certain amount of rebound, such as 0.2-0.5mm, when the battery piece contacts the fixed disc, to protect the battery piece. Since the battery piece is directly contacted with the fixed disc before being adsorbed, the positional deviation of the battery piece caused by adsorption is minimal at this time, further improving the test accuracy.

[0062] This embodiment can effectively reduce the damage to the battery piece caused by direct impact by providing a flexible material on the surface of the second sub-feeding mechanism in contact with the battery piece. This is of great significance to improve the quality of the battery piece and the test accuracy.

[0063] According to the embodiments of the present disclosure, a plurality of air channels are arranged in the fixed disc 21, and the plurality of air channels are respectively communicated with a plurality of air holes arranged on the side of the fixed disc 21 close to the second sub-feeding mechanism 12, for forming vacuum negative pressure at the plurality of air holes to adsorb and fix the solar cell piece.

[0064] In some embodiments, the fixing disc is a key component in the testing device for adsorbing and fixing the solar cell piece during the testing process.

[0065] For example, the vacuum negative pressure method can be used to adsorb the cell piece. The fixing disc is internally provided with a plurality of air channels, which are respectively communicated with a plurality of air holes arranged on the surface of the fixing disc. The air holes are uniformly distributed on the surface of the fixing disc to ensure that the cell piece can be smoothly and uniformly adsorbed on the fixing disc. When the vacuum negative pressure is generated in the air channel, a strong adsorption force will be formed at the air hole to firmly fix the cell piece on the fixing disc.

[0066] In order to generate the vacuum negative pressure, the fixing disc is connected to a vacuum negative pressure system. The system can include a vacuum pump, a valve and a pipeline and other components for controlling the air pressure in the air channel. When the cell piece needs to be adsorbed, the vacuum pump is started and the air in the air channel is pumped out through the pipeline to form the vacuum negative pressure; when the cell piece needs to be released, the valve is opened to allow air to enter the air channel, thereby eliminating the vacuum negative pressure. The vacuum negative pressure system is connected to the fixing disc through the pipeline, so that the whole system is more compact, easy to operate and maintain. At the same time, since the design of the air channel and the air hole is relatively simple, the complexity and cost of the system are also reduced.

[0067] In this embodiment, the testing device also includes a control system, for example. The control system is used to control the operation of the whole testing device. It can automatically adjust the working state of the feeding mechanism, the fixing disc, the testing mechanism and the vacuum negative pressure system according to the preset testing parameters and process. At the same time, the control system can also monitor various data in real time during the testing process, such as the position of the cell piece, the adsorption state, the testing result, etc., to ensure the accuracy and reliability of the testing.

[0068] Through the design of the air channel and the air hole, the fixing disc can form a strong vacuum negative pressure at the air hole, thereby efficiently adsorbing and fixing the solar cell piece. This design not only improves the accuracy of the test, but also ensures the stability and safety of the cell piece during the testing process.

[0069] It can be understood that the design of the fixing disc can be applied to solar cell pieces of different sizes and specifications. By adjusting the size and distribution of the air hole, it can be ensured that the cell piece can be smoothly and uniformly adsorbed on the fixing disc, thereby meeting various testing requirements.

[0070] According to the embodiment of the present disclosure, the fixing disc 21 is provided with a plurality of grooves near one side of the second sub-feeding mechanism 12, and a suction disc is arranged in each groove. The height of the suction disc in the groove is less than or equal to the depth of the groove. The suction disc is used to provide a vacuum negative pressure to adsorb and fix the solar cell piece.

[0071] In some embodiments, in addition to directly using the air hole adsorption scheme, a plurality of grooves can also be arranged on the side of the fixing disc close to the second sub-feeding mechanism, and these grooves form a regular arrangement on the surface of the fixing disc. Each groove is equipped with a suction cup, and the height of the suction cup in the groove is designed to be less than or equal to the depth of the groove. Such a design ensures that when the battery piece is transported onto the fixing disc, the suction cup can be completely embedded in the groove, so that the fixing disc can be in close contact with the surface of the battery piece.

[0072] It can be understood that the suction cup has elasticity, and when directly using the suction cup to adsorb the battery piece, the suction cup may be elastically deformed during the test stress of the battery piece, causing test errors. Therefore, in the present embodiment, the suction cup is arranged in the groove, and the suction cup can be in contact with the battery piece or not. When the suction cup contacts the battery piece, the battery piece also contacts the fixing disc, so that the suction cup does not deform during the test stress, improving the test accuracy of the battery piece.

[0073] The suction cup is connected to a vacuum negative pressure system through a pipeline, which can generate the required vacuum negative pressure. When the battery piece is transported onto the fixing disc, the vacuum negative pressure system is started, and a strong adsorption force is formed on the surface of the battery piece through the suction cup, firmly fixing the battery piece in the groove.

[0074] Through the design of the groove and the suction cup, the fixing disc can form a strong vacuum negative pressure on the surface of the battery piece, thereby stably adsorbing and fixing the battery piece. This design not only improves the accuracy of the test, but also ensures the stability and safety of the battery piece during the test.

[0075] The arrangement and size of the groove enable the battery piece to be accurately adsorbed on the fixing disc, avoiding movement or misplacement of the battery piece during the test.

[0076] Compared with directly using the air hole to adsorb the battery piece, the design of the groove and the suction cup has a simpler air path, making the fixing disc easy to operate and maintain. At the same time, since the suction cup can be easily disassembled and replaced, the maintenance cost of the system is also reduced.

[0077] The fixing disc design can also be applied to solar battery pieces of different sizes and specifications. By adjusting the size and arrangement of the grooves, different sizes of battery pieces can be adapted to meet various test requirements.

[0078] According to the embodiments of the present disclosure, the number of the plurality of fixing discs 21 is 2-4, and the plurality of fixing discs 21 are symmetrically distributed about at least one of the first direction x and the third direction z, and the third direction z is perpendicular to the first direction x and the second direction y, respectively.

[0079] In some embodiments, the number of fixing disks can be two to four, and these fixing disks are symmetrically distributed about at least one of a first direction and a third direction. The first direction can be a horizontal direction (such as the direction of movement of the conveyor belt), and the third direction is perpendicular to both the first and second directions (such as the direction perpendicular to the conveyor belt). This design ensures a uniform distribution of the fixing disks within the test area, which is beneficial for rapid and accurate testing of the solar cells.

[0080] The mounting plate can employ various methods to adsorb and secure the battery cells, such as using a vacuum negative pressure system. In this embodiment, the pore, groove, and suction cup design from the previous embodiments can be used to ensure that the battery cells can be stably fixed on the mounting plate.

[0081] For example, when using two fixed disks, they form a straight line, rotating around the center of this line. When using three fixed disks, they form a T-shape, rotating around the intersection of the T-shape. When using four fixed disks, they form a cross shape, rotating around the intersection of the cross shape. Different numbers of fixed disks are suitable for different application scenarios. Increasing the number of fixed disks improves testing efficiency but also increases the idle rate of the disks. Due to the symmetrical distribution of the fixed disks, the control system can manage the testing process more efficiently, ensuring the accuracy and reliability of the tests.

[0082] The symmetrical distribution of the mounting trays facilitates a smoother testing process, reducing the movement and waiting time of the solar cells during testing. This symmetrical design also allows the testing facility to test multiple solar cells simultaneously, thereby improving testing efficiency.

[0083] The symmetrical distribution of the fixed disks makes the testing device easier to operate and maintain. Furthermore, the flexibility and applicability of the testing device are enhanced because the number and distribution of the fixed disks can be adjusted according to actual needs.

[0084] According to embodiments of this disclosure, the material of the fixing plate 21 is a transparent material, including glass and plastic.

[0085] In some embodiments, the mounting plate is made of a transparent material, specifically glass or plastic. Glass mounting plates offer advantages such as high strength, high transparency, and good heat resistance, making them suitable for testing environments requiring prolonged exposure to high pressure and light transmission. Plastic mounting plates, on the other hand, are lightweight, low-cost, and easy to process, making them suitable for testing scenarios where cost is a concern.

[0086] For example, the plastic fixing disc can be made of polycarbonate (PC), polymethyl methacrylate (PMMA), also known as acrylic or organic glass, and optical grade glass fiber reinforced plastic, etc.

[0087] Since the fixing disc is made of transparent material, it is suitable for IV testing of solar cell pieces, for example, the light source is arranged on the side of the fixing disc opposite to the solar cell piece. Moreover, the present embodiment adopts the upper adsorption scheme, for example, the cell piece is directly adsorbed on the lower surface of the fixing disc, and the light emitted by the light source transmits through the glass fixing disc from the upper surface of the fixing disc to the blue film surface (light receiving surface) of the cell piece, generating photoelectric current and photovoltage. The test process is not blocked by the probe, which improves the test accuracy.

[0088] In addition, the state of the cell piece during the test process can also be clearly observed, such as whether the cell piece is flat, whether there are cracks or stains, etc. This helps to discover and handle the quality problems of the cell piece in time, and improves the accuracy of the test.

[0089] The structure of the fixing disc can be adjusted according to actual needs, such as setting anti-skid lines, buffer layers, etc., to reduce the damage of the cell piece during the test process. At the same time, the fixing disc can also be combined with a vacuum negative pressure system or other fixing mechanism to ensure the stability and accuracy of the cell piece during the test process.

[0090] The test mechanism is located above or below the fixing disc (according to the specific design), which is used to test the cell piece. Since the fixing disc is made of transparent material, the test mechanism can more accurately obtain the state information of the cell piece, such as through optical detection, image processing, etc. to evaluate the quality of the cell piece.

[0091] At the same time, since the fixing disc is made of transparent material, the control system can also more intuitively obtain the state information of the cell piece, so as to more accurately control the test process.

[0092] The present embodiment realizes efficient and accurate testing of solar cell pieces by designing a fixing disc made of transparent material and matching test mechanism and control system. At the same time, the design of transparent fixing disc also improves the visibility and accuracy of the test, making the test process more intuitive and reliable.

[0093] According to the embodiments of the present disclosure, as shown in Figure 1B and 1C The solar cell piece testing device further comprises a positioning camera 4 arranged at any one or more of the second sub-feeding mechanism 12 and the test mechanism 3, and the positioning camera 4 is used for shooting and positioning the solar cell piece fixed on one side of the fixing disc 21.

[0094] In some embodiments, the solar cell testing device mainly consists of a feeding mechanism, a fixing disc, a testing mechanism, a positioning camera, and a control system. The positioning camera is arranged at any one or more of the second sub-feeding mechanism and the testing mechanism, so as to take pictures of the solar cell fixed on one side of the fixing disc.

[0095] The solar cell is placed on one side of the fixing disc, such as the lower side, by the second sub-feeding mechanism.

[0096] The positioning camera takes pictures of the solar cell fixed on one side of the fixing disc, and obtains real-time position information of the solar cell. At the same time, the positioning camera adopts a non-contact detection method, which avoids physical damage and pollution to the solar cell.

[0097] The positioning camera, for example, adopts a high-resolution camera, which can capture the slight position deviation of the solar cell. The high-resolution camera is the core component of the positioning system, and its performance directly affects the positioning accuracy and efficiency.

[0098] The higher the resolution of the camera, the more image details it can capture, and the higher the positioning accuracy. Therefore, when selecting a camera, a model with higher resolution should be given priority.

[0099] The frame rate determines the number of images that the camera can capture per second. In high-speed motion scenes, a camera with a higher frame rate should be selected to ensure that enough image information is captured. For the solar cell testing device, although the solar cell usually does not move at high speed, a high-frame-rate camera can still help reduce the delay and error in the positioning process.

[0100] The selection of the lens also affects the imaging quality and positioning accuracy of the camera. The appropriate focal length and aperture size of the lens should be selected according to the size, shape, and testing requirements of the solar cell.

[0101] In addition, the interface type of the camera determines the data transmission speed and stability between the camera and the control system. When selecting a camera, the compatible interface type of the control system should be considered, such as GigE, USB3.0, etc.

[0102] Through the image processing algorithm, the deviation of the solar cell relative to the reference position is calculated.

[0103] The image processing algorithm is another key component of the positioning system, which is responsible for processing the image information captured by the camera and calculating the real-time position information of the solar cell. The image processing algorithm, for example, adopts an advanced algorithm, which can accurately calculate the real-time position information of the solar cell.

[0104] Image preprocessing is the first step of image processing, including denoising, enhancement, filtering and other operations. These operations help to improve the clarity and contrast of the image, making it easier to extract the edge and feature information of the battery sheet.

[0105] Feature extraction is the core part of the image processing algorithm, which is responsible for extracting the feature information of the battery sheet from the image, such as edge, corner, mark point, texture, etc. These feature information will be used for subsequent matching and positioning operations.

[0106] Matching algorithm is used to match the extracted feature information with the preset template or database, so as to determine the position and attitude of the battery sheet. When selecting the matching algorithm, factors such as matching accuracy, speed and robustness should be considered.

[0107] In order to further improve the positioning accuracy and efficiency, some optimization algorithms such as genetic algorithm, particle swarm algorithm, etc. can be used. These algorithms can quickly find the optimal solution in complex search space, so as to realize the accurate positioning of the battery sheet.

[0108] According to the position deviation information obtained by the positioning camera, the control system calculates the position compensation amount that the probe needs to adjust, and drives the probe device to adjust the position, so as to ensure that the probe can accurately align with the test points on the battery sheet grid line.

[0109] Since the embodiment adopts the upper adsorption mode, after the fixed disc adsorbs the battery sheet, the battery sheet is photographed and positioned, and after positioning, the battery sheet has no displacement, which improves the test accuracy.

[0110] The control system can receive the position deviation information of the positioning camera in real time, and quickly calculate the position compensation amount of the probe. The probe device can also quickly respond to the instructions of the control system to adjust the position, so as to ensure the test accuracy.

[0111] The control system also has the ability of automatic learning and optimization, which can continuously optimize the algorithm and parameter setting according to the historical data and real-time feedback. The control system can also monitor the test data of the battery sheet in real time, and feedback and adjust according to the test results, so as to ensure the stability and accuracy of the test.

[0112] By using the above solar cell test device, accurate positioning and probe position compensation of the battery sheet can be realized, so as to improve the accuracy and reliability of the test. At the same time, the device also has the technical characteristics of high efficiency, non-contact detection and intelligent control, which can meet the needs of large-scale production.

[0113] Optionally, the number of positioning cameras 4 corresponding to each solar cell sheet is 2-4.

[0114] In some embodiments, each solar cell is equipped with 2 to 4 positioning cameras due to the limited field of view of each camera. The cameras should be reasonably distributed according to the size, shape, and distribution of mark points on the cell. In general, the cameras should be placed in a position where they can clearly capture the mark points to ensure the accuracy and stability of the positioning.

[0115] The cameras should have high resolution, high frame rate, low noise, and other characteristics to provide high-quality image information. At the same time, the lens, interface type, and other parts of the camera should be compatible with other parts of the testing device.

[0116] The mark points can be specific patterns, holes, edges, or other features on the cell. Different types of mark points require different positioning algorithms and camera configurations.

[0117] Different cameras are used for positioning different mark points. This helps to make full use of the characteristics and advantages of the cameras, improving the accuracy and efficiency of positioning.

[0118] For each image captured by the camera, appropriate image processing algorithms should be used for pre-processing, feature extraction, and matching. The selection and optimization of algorithms should be adjusted according to the type, shape, and distribution of mark points.

[0119] By using multiple cameras and positioning strategies for different mark points, the positioning accuracy of the cell can be significantly improved. This helps to ensure that the probes can accurately align with the test points on the cell grid lines, thereby improving the accuracy and reliability of the test.

[0120] The configuration of multiple cameras can also provide redundant information to enhance the reliability of the system. Even if a camera fails or the image quality is poor, other cameras can still provide effective positioning information.

[0121] This design can also adapt to different sizes, shapes, and mark point distributions of the cell. By adjusting the layout of the cameras and the algorithm parameters, accurate positioning of different types of cells can be achieved.

[0122] According to an embodiment of the present disclosure, the testing mechanism 3 includes a plurality of probes for applying a voltage to the solar cell when in contact with the solar cell. In the case where the grid lines of the solar cell have a positional deviation from the plurality of probes, the plurality of probes move a compensation distance in at least one of a first direction x and a third direction z, and then move along a second direction y and come into contact with the solar cell, the third direction z being perpendicular to the first direction x and the second direction y, respectively, and the compensation distance being determined based on the positioning result of the positioning camera 4.

[0123] In some embodiments, the testing mechanism of the solar cell wafer includes a plurality of probes and corresponding driving mechanisms for applying voltage to the solar cell wafer for testing when in contact with the solar cell wafer. The probes can move in the first direction and the third direction (in the plane of the solar cell wafer and perpendicular to the second direction, respectively) to compensate for positional deviations between the cell grid lines and the probes to ensure that the probes can accurately align with the cell grid lines for testing when the cell wafer is positioned by the positioning camera.

[0124] The testing mechanism includes a probe assembly composed of a plurality of probes, each of which is electrically conductive for applying voltage to the cell wafer. The tips of the probes are designed to match the shape of the cell grid lines to ensure good contact and current transmission.

[0125] The driving mechanism is responsible for driving the probes to move in the first direction, the second direction, and the third direction. The first direction and the third direction are horizontal directions, respectively perpendicular to the second direction (i.e., the direction of movement of the probes towards or away from the solar cell wafer).

[0126] The driving mechanism can use precision motors, stepper motors, or servo motors, etc., to ensure the accuracy and stability of the movement of the probes.

[0127] A positioning camera can also be provided at the testing mechanism, which is provided at the front end or side of the testing mechanism for positioning the cell wafer by taking pictures. The camera has high resolution and high-speed shooting capability, and can capture real-time image information of the cell wafer.

[0128] Through image processing algorithms, the control system can calculate the positional deviation between the cell grid lines and the probes.

[0129] The testing process may, for example, place the cell wafer on the fixed disc of the testing mechanism. Start the positioning camera to take pictures of the cell wafer to obtain real-time positional information of the cell wafer. Through image processing algorithms, calculate the positional deviation between the cell grid lines and the probes.

[0130] According to the positioning results of the positioning camera, the control system calculates the compensation distance that the probes need to move.

[0131] The driving mechanism is started to drive the probes to move in the first direction and / or the third direction to compensate for the positional deviation, so as to eliminate the positional deviation. When the probes move to the correct position, the driving mechanism drives the probes to move along the second direction to make them contact with the cell grid lines.

[0132] After the probes contact with the cell grid lines, the control system applies voltage to the probes for testing.

[0133] The test data is collected and analyzed in real time to evaluate the performance and quality of the cell wafer.

[0134] It can be understood that the design of the probe assembly and the driving mechanism enables the testing mechanism to adapt to different sizes and shapes of battery pieces. By adjusting the number and layout of the probes, the testing requirements for different battery piece grid layouts can be achieved.

[0135] By introducing multiple probes and corresponding driving mechanisms, accurate positioning and testing of the battery piece can be achieved. The testing mechanism has the advantages of high-precision positioning, high flexibility, high automation, and high reliability, and can meet the needs of large-scale production.

[0136] According to an embodiment of the present disclosure, the solar cell testing device further comprises a discharging mechanism arranged on the opposite side of the feeding mechanism 1 or the testing mechanism 3. When the projection position of the fixed disc 21 and the discharging mechanism on the surface of the solar cell coincides, the distance between the discharging mechanism and the fixed disc 21 is less than or equal to a preset threshold, which is used to receive the solar cell released by the fixed disc 21.

[0137] In some embodiments, the discharging mechanism of the solar cell testing device is specifically described, which is arranged on the opposite side of the feeding mechanism or the testing mechanism, and is used to receive the solar cell released by the fixed disc after the test is completed. By accurately controlling the distance between the discharging mechanism and the fixed disc, it is ensured that the battery piece can be smoothly and accurately received by the discharging mechanism, thereby improving the automation degree and testing efficiency of the testing device.

[0138] For example, the discharging mechanism is provided with one or more pairs of parallel conveyor belts, which are the core components of the discharging mechanism and are used to directly receive the solar cell released by the fixed disc. The surface of the conveyor belt can be provided with anti-skid material to ensure that the battery piece does not slip or damage during the conveying process. The conveyor belt is driven by a motor and can transmit the battery piece from below the fixed disc to a designated position at a constant speed.

[0139] For another example, the discharging mechanism is also provided with a receiving platform at the end of the conveyor belt assembly, which is used to receive the battery piece that slips off the conveyor belt. The surface of the receiving platform is flat and smooth to reduce friction and damage of the battery piece during the slipping process. A collection box or conveying device can be arranged below the receiving platform to further classify or transmit the battery piece to the next process.

[0140] For another example, the discharging mechanism is also provided with a distance adjusting device for adjusting the distance between the discharging mechanism and the fixed disc to ensure that the distance is less than or equal to a preset threshold, such as 2mm. The distance adjusting device can adopt precise adjusting screws or air cylinders and other components to realize fine adjustment function. By adjusting the distance adjusting device, it can be ensured that the battery piece can be smoothly dropped onto the conveyor belt when released, avoiding collision or damage.

[0141] The discharging process can be, for example, after the test is completed, the fixed disc moves the battery piece to the position coinciding with the projection position of the discharging mechanism under the driving of the control system. When the fixed disc coincides with the projection position of the discharging mechanism on the surface of the battery piece, the battery piece can be smoothly dropped onto the conveying belt due to the small distance (less than or equal to the preset threshold) between the discharging mechanism and the fixed disc.

[0142] The conveying belt is started to transmit the battery piece to the receiving platform.

[0143] The receiving platform further classifies or transmits the battery piece to the next process for processing.

[0144] The discharging mechanism adopts a simple structure such as a conveying belt assembly and a receiving platform, which is easy to maintain and maintain, and can ensure the stability of the battery piece during transmission. The distance adjusting device can realize fine tuning function to ensure that the battery piece can be smoothly dropped onto the conveying belt when released.

[0145] The design of the discharging mechanism also makes it suitable for battery pieces of different sizes and shapes. By adjusting the speed of the conveying belt and the size of the receiving platform and other parameters, the discharging needs of battery pieces of different specifications can be realized.

[0146] It should be understood that the specific order or hierarchy of steps in the disclosed processes is an example of exemplary methods. Based on design preferences, it is understood that the specific order or hierarchy of steps in the processes can be rearranged without departing from the scope of the disclosure. The accompanying method claims present elements of the various steps in exemplary order, and are not intended to be limited to the specific order or hierarchy presented.

[0147] It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only the directions of reference to the drawings, and are not intended to limit the scope of protection of the disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. When it may cause confusion in understanding the disclosure, the conventional structure or configuration will be omitted. And the shape, size, positional relationship of the components in the figure do not reflect the true size, proportion and actual positional relationship.

[0148] In the above detailed description, various features are combined in a single embodiment for simplicity of disclosure. Such disclosure methods should not be interpreted as reflecting the intention that the embodiments of the claimed subject matter require more features than those clearly stated in each claim. On the contrary, as reflected by the appended claims, the disclosure is in a state of less than all the features of the disclosed single embodiment. Therefore, the appended claims are hereby incorporated into the detailed description, in which each claim is separately a preferred embodiment of the disclosure.

[0149] Furthermore, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of indicated technical features. Therefore, a feature labeled with "first", "second", etc. can include one or more of the features implicitly or explicitly. In the description of the disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. As for the term "comprising" used in the specification or claims, the coverage is similar to the term "including", as explained by the term "including" used as a conjunction in the claims. Any term "or" used in the specification or claims is to mean "non-exclusive or", as explained by the term "including" used as a conjunction in the claims.

[0150] The specific embodiments described above are intended to further explain the purpose, technical solutions and beneficial effects of the disclosure. It should be understood that the above description is only a specific embodiment of the disclosure and is not intended to limit the disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the disclosure shall be included in the protection scope of the disclosure.

Claims

1. A solar cell testing apparatus, characterized by comprising: The utility model relates to a solar cell testing device, comprising: a feeding mechanism, comprising a first sub-feeding mechanism and a second sub-feeding mechanism, the first sub-feeding mechanism is used for transmitting solar cell pieces along a first direction to the second sub-feeding mechanism, the second sub-feeding mechanism is used for moving the solar cell pieces to a first specific position along a second direction, the first direction is perpendicular to the second direction, and the second direction is perpendicular to the plane where the solar cell pieces are located; a rotating table mechanism, comprising a plurality of fixed discs, each of the fixed discs is used for adsorbing and fixing the solar cell pieces at the first specific position and rotating and moving the fixed solar cell pieces to a second specific position; a testing mechanism, used for testing the solar cell pieces at the second specific position.

2. The solar cell testing apparatus according to claim 1, wherein The feeding mechanism further comprises a baffle, which is arranged at one end of the first sub-feeding mechanism close to the second sub-feeding mechanism to limit the transmission of the solar cell pieces by the first sub-feeding mechanism.

3. The solar cell testing apparatus according to claim 1, wherein The first sub-feeding mechanism comprises a plurality of conveyer belts arranged in parallel along the first direction, each of the conveyer belts comprises one or more segments that are independently controlled to start and stop, and the number of segments of each of the conveyer belts corresponds.

4. The solar cell testing apparatus according to claim 3, wherein The number of the conveyer belts is 2 or 4.

5. The solar cell testing apparatus according to claim 1, wherein The surface of the second sub-feeding mechanism in contact with the solar cell pieces is provided with a flexible material to provide a buffer when the solar cell pieces contact the fixed disc.

6. The solar cell testing apparatus according to claim 1, wherein The fixed disc is provided with a plurality of air channels, which are respectively communicated with a plurality of air holes arranged on the side of the fixed disc close to the second sub-feeding mechanism, to form a vacuum negative pressure at the air holes to adsorb and fix the solar cell pieces.

7. The solar cell testing apparatus according to claim 1, wherein The side of the fixed disc close to the second sub-feeding mechanism is provided with a plurality of grooves, each of the grooves is provided with a suction disc, the height of the suction disc in the groove is less than or equal to the depth of the groove, and the suction disc is used to provide a vacuum negative pressure to adsorb and fix the solar cell pieces.

8. The solar cell testing apparatus according to claim 6 or 7, wherein The number of the plurality of fixed discs is 2-4, and the plurality of fixed discs are symmetrically distributed about at least one of the first direction and a third direction, and the third direction is perpendicular to the first direction and the second direction.

9. The solar cell testing apparatus according to claim 6 or 7, wherein The material of the fixed disc is transparent.

10. The solar cell testing apparatus according to claim 1, wherein Further comprising: a positioning camera, arranged at any one or more of the second sub-feeding mechanism and the testing mechanism, the positioning camera is used for shooting and positioning the solar cell pieces fixed on one side of the fixed disc.

11. The solar cell testing apparatus according to claim 10, wherein Corresponding to each of the solar cell pieces, the number of the positioning cameras is 2-4.

12. The solar cell testing apparatus according to claim 10, wherein The testing mechanism comprises a plurality of probes, which are used to apply a voltage to the solar cell pieces when in contact with the solar cell pieces; In the case that the grid lines of the solar cell and the plurality of probes have a positional deviation, the plurality of probes move along the second direction and contact the solar cell after moving a compensation distance in at least one of the first direction and a third direction, the third direction being perpendicular to the first direction and the second direction respectively, the compensation distance being determined based on the positioning result of the positioning camera.

13. The solar cell testing apparatus of claim 8, wherein Also comprising: A blanking mechanism arranged on the opposite side of the feeding mechanism or the testing mechanism; In the case that the fixed disc and the blanking mechanism coincide in the projection position on the surface where the solar cell is located, the distance between the blanking mechanism and the fixed disc is less than or equal to a preset threshold, for receiving the solar cell released by the fixed disc.

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