Detection device

Abstract

The utility model relates to a detection device. The detection device comprises a conveying mechanism, a first appearance detection mechanism, a turnover mechanism, a second appearance detection mechanism and a current-voltage detection mechanism. The conveying mechanism comprises a conveying line, the conveying line is used for supporting and conveying a to-be-detected battery piece, the first appearance detection mechanism, the turnover mechanism, the second appearance detection mechanism and the current-voltage detection mechanism are arranged at intervals in the conveying direction of the conveying line, and the turnover mechanism is used for driving the to-be-detected battery piece to turn over; and the positions of the second surface and the first surface of the to-be-detected battery piece are exchanged.

Description

Technical Field

[0001] This application relates to the field of battery processing equipment technology, and in particular to a testing device. Background Technology

[0002] With the rapid development of the solar energy industry in recent years, the demand for fully automated solar cell production equipment has been increasing. In the field of solar cells, after the cells to be tested are manufactured, they are usually inspected for appearance, performance, and other aspects, and then classified into different grades.

[0003] Taking an existing inspection device for visual inspection of a battery cell as an example, the device has two visual inspection mechanisms mounted upright and upside down, respectively, to inspect the front and back of the battery cell. The back inspection involves using a Bernoulli suction cup to pick up the battery cell and transfer it to the upside-down visual inspection mechanism. However, the Bernoulli suction cup is prone to breaking the battery cell, leading to increased failure rates such as fragmentation and chipping, and also increasing the surface scratch rate of the battery cell. Utility Model Content

[0004] Therefore, it is necessary to provide a detection device that can reduce the risk of the tested solar cell being broken.

[0005] A detection device includes a conveying mechanism, a first appearance detection mechanism, a flipping mechanism, a second appearance detection mechanism, and a current-voltage detection mechanism.

[0006] The conveying mechanism includes a conveyor line for supporting and conveying the battery cell to be tested. The first appearance inspection mechanism, the flipping mechanism, the second appearance inspection mechanism, and the current-voltage detection mechanism are arranged at intervals along the conveying direction of the conveyor line. The flipping mechanism is used to drive the battery cell to be tested to flip so that the second side and the first side of the battery cell to be tested are interchanged.

[0007] In some embodiments, the detection device includes a rejection mechanism disposed between the first appearance detection mechanism and the flipping mechanism, the rejection mechanism being used to remove the battery cells to be tested that are detected as having unqualified appearance by the first appearance detection mechanism from the conveyor line.

[0008] In some embodiments, the detection device further includes a rotating mechanism, a first conveying mechanism, and a second conveying mechanism. The rotating mechanism has a rotating disk. The first conveying mechanism is electrically connected to the second appearance inspection mechanism and is used to transfer the battery cell to be tested, which has been detected as having acceptable appearance by the second appearance inspection mechanism, onto the rotating disk. The rotating disk drives the battery cell to be tested to rotate to the detection area of ​​the current-voltage detection mechanism for detection. After the battery cell to be tested is detected, the rotating disk drives the battery cell to continue rotating in its original direction and move it out of the detection area of ​​the current-voltage detection mechanism. The second conveying mechanism is used to transport the battery cell to be tested, which has moved out of the detection area of ​​the current-voltage detection mechanism, to a position downstream of the current-voltage detection mechanism on the conveyor line.

[0009] In some embodiments, the detection device further includes a visual positioning mechanism, which is disposed between the second appearance detection mechanism and the rotating mechanism and electrically connected to the first conveying mechanism. The first conveying mechanism is used to transfer the battery cell to be tested, which is detected by the second appearance detection mechanism as having qualified appearance, to the visual positioning mechanism and is detected by the visual positioning mechanism.

[0010] In some embodiments, the testing device further includes a defective cell storage box for storing the battery cells to be tested that are found to be defective in appearance by the second appearance inspection agency;

[0011] The first handling mechanism is used to transfer the battery cell to be tested, which is detected as having an unqualified appearance by the second appearance inspection mechanism, to the unqualified cell storage box when the visual positioning mechanism detects it.

[0012] In some embodiments, the detection device further includes a standard sample storage box for storing standard battery cells;

[0013] The first transport mechanism is used to transport the standard battery cell in the standard cell storage box to the rotating disk before the detection device starts detecting the battery cell to be tested. The rotating disk drives the standard battery cell to rotate to the detection area of ​​the current-voltage detection mechanism for detection, and obtains the standard parameters of the standard battery cell. The standard parameters are used to compare with the actual parameters of the battery cell to be tested obtained by the current-voltage detection mechanism.

[0014] In some embodiments, the detection device further includes a polishing storage box for storing polished parts;

[0015] The current-voltage detection mechanism has a probe. The first transport mechanism is used to transport the polishing part in the polishing storage box to the rotating disk when the probe needs to be polished. The rotating disk drives the polishing part to rotate to the detection area of ​​the current-voltage detection mechanism to polish the probe.

[0016] In some embodiments, the detection device further includes a photoluminescence detection mechanism disposed downstream of the current-voltage detection mechanism along the conveying direction of the conveyor line, the photoluminescence detection mechanism being used to detect the battery cell under test passing through its detection area.

[0017] In some embodiments, the detection device further includes a third transport mechanism and a return mechanism. The third transport mechanism is disposed downstream of the photoluminescence detection mechanism along the transport direction of the transport line. The return mechanism includes a return line, which is parallel to and spaced apart from the transport line along a direction intersecting the transport direction of the transport line.

[0018] The third transport mechanism is used to transfer the tested battery cell, which has been tested by the photoluminescence detection mechanism, to the return line. The return line is used to transport the tested battery cell in a direction opposite to the transport direction of the conveyor line. The first transport mechanism is used to transport the tested battery cell on the return line to the rotary disk, so that the tested battery cell can be rotated to the detection area of ​​the current-voltage detection mechanism for re-inspection under the drive of the rotary disk.

[0019] In some embodiments, the detection device further includes a buffer mechanism disposed on the transport path of the battery cell under test on the return line, and used to receive and buffer the battery cell under test when it flows through the buffer area of ​​the buffer mechanism on the return line.

[0020] In some embodiments, the conveying mechanism, the first appearance inspection mechanism, the flipping mechanism, the second appearance inspection mechanism, the rotating mechanism, the current-voltage detection mechanism, the first handling mechanism, the second handling mechanism, and the photoluminescence detection mechanism are all arranged symmetrically about the same center line.

[0021] In some embodiments, both first transport mechanisms and both second transport mechanisms are located between the transport lines of the two transport mechanisms.

[0022] The aforementioned testing device, because the conveyor line can support and transport the battery cells under test, and through the flipping action of the flipping mechanism, allows both the first and second appearance inspection mechanisms to be mounted upright above the battery cells under test, respectively inspecting the appearance of the first and second sides of the battery cells, thus achieving automatic inspection of the appearance of the battery cells under test. This eliminates the need for Bernoulli suction cups, preventing the battery cells from being broken by suction and resulting in fragments or scattering, reducing the probability of surface scratches on the battery cells, decreasing the probability of device malfunction, lowering the alarm rate, and making the device more stable in operation and more efficient in testing. Attached Figure Description

[0023] Figure 1 This is a layout diagram of the detection device in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the flipping mechanism of the detection device in one embodiment of this application.

[0025] Icon labels:

[0026] 100. Detection device;

[0027] 10. Inspection line; 20. Loading station; 30. Current-voltage detection station; 40. First unloading station; 50. Second unloading station;

[0028] 11. Conveying mechanism; 12. First appearance inspection mechanism; 13. Rejection mechanism; 14. Tilting mechanism; 15. Second appearance inspection mechanism; 16. Vision positioning mechanism; 17. First handling mechanism; 18. Rotation mechanism; 19. Current-voltage detection mechanism; 21. Second handling mechanism; 22. Defective sheet storage box; 23. Standard sheet storage box; 24. Polishing storage box; 25. Photoluminescence detection mechanism; 26. Third handling mechanism; 27. Return mechanism; 28. Buffer mechanism;

[0029] 111. Conveyor line; 141. First tilting wheel; 142. Second tilting wheel; 143. Clamping gap; 271. Return line;

[0030] X, first direction; Y, second direction; Z, third direction; L, center line of symmetry. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Please see Figure 1 and Figure 2 This application provides a testing device 100 for testing a battery cell under test, which includes a conveying mechanism 11, a first appearance inspection mechanism 12, a flipping mechanism 14, a second appearance inspection mechanism 15, and a current-voltage detection mechanism 19. The conveying mechanism 11 includes a conveyor line 111 for supporting and conveying the battery cell under test. The first appearance inspection mechanism 12, the flipping mechanism 14, the second appearance inspection mechanism 15, and the current-voltage detection mechanism 19 are arranged at intervals along the conveying direction of the conveyor line 111. The first appearance inspection mechanism 12 is used to inspect the appearance of the first side of the battery cell under test facing away from the conveyor line 111. The flipping mechanism 14 is used to flip the battery cell under test so that the second side of the battery cell under test is interchanged with the first side. The second appearance inspection mechanism 15 is used to inspect the appearance of the second side of the battery cell under test. The current-voltage detection mechanism 19 is used to inspect the battery cell under test passing through its inspection area.

[0038] Specifically, the conveyor line 111 can be a synchronous belt, a belt, etc. The conveyor line 111 supports the bottom of the solar cell under test and is used to transport the solar cell under test. The direction in which the conveyor line 111 transports the solar cell under test is defined as the first direction X. Figure 1 Taking the state of the detection device 100 as an example, the first direction X is from left to right.

[0039] It should be noted that the conveying mechanism 11 may include, but is not limited to, only the conveyor line 111. In some other embodiments, the conveying mechanism 11 may also include limiting strips spaced at intervals on both sides of the conveyor line 111 along a direction intersecting the conveying direction of the conveyor line 111. The limiting strips are used to limit the battery cell under test to prevent it from falling off the conveyor line 111. The direction intersecting the conveying direction of the conveyor line 111 is defined as the second direction Y, which is the width direction of the conveyor line 111. Figure 1 Taking the state of the detection device 100 as an example, the second direction is the up-down direction Y.

[0040] As an example, the first appearance inspection mechanism 12 and the second appearance inspection mechanism 15 can be, but are not limited to, AOI (Automated Optical Inspection) inspection mechanisms. The first appearance inspection mechanism 12 and the second appearance inspection mechanism 15 are used to inspect whether there are missing defects, V-shaped defects, edge defects, etc. on the first and second sides of the battery cell under test. Generally speaking, the first and second sides of the battery cell under test are the reverse and front sides of the battery, respectively. The reverse and front sides generally refer to the two sides of the battery cell with the largest area.

[0041] Specifically, such as Figure 2 As shown, as an example, the flipping mechanism 14 may include, but is not limited to, a base and a flipping assembly. The flipping assembly includes a first flipping wheel 141 and a second flipping wheel 142, both of which are rotatably mounted on the base. The first flipping wheel 141 and the second flipping wheel 142 are spaced apart along a direction intersecting the conveying direction of the conveyor line 111 and form a clamping gap 143.

[0042] In actual operation, the battery cell to be tested on the conveyor line 111 is inserted into the clamping gap 143 between the first rotating wheel 141 and the second rotating wheel 142, and rotated 180° under the action of the first rotating wheel 141 and the second rotating wheel 142 to realize the position exchange between the first side and the second side.

[0043] Specifically, the number of flipping components is the same as and corresponds one-to-one with the number of battery cells to be tested on the conveyor line 111 along the direction intersecting with its conveying direction. The battery cells to be tested are inserted into the clamping gap 143 of the corresponding flipping component. Of course, in some other embodiments, the structure of the flipping mechanism 14 is not limited to the one described above, and may be in other forms, which are not limited here.

[0044] The current-voltage detection mechanism 19 can be, but is not limited to, an IV tester. The IV tester measures the current output of the cell under test at different voltages and plots its IV curve to obtain key performance parameters such as open-circuit voltage (Voc), short-circuit current (Isc), fill factor (FF), and conversion efficiency (Eff). Based on the results obtained by the IV tester, performance data of the cell under test can be collected, and subsequently, the cell under test can be sorted using this data. In this application, during the detection process by the detection device 100, the cell under test is loaded onto the conveyor line 111 with its first side facing upwards. Under the action of the conveyor line 111, the cell under test sequentially passes through the first appearance inspection mechanism 12, the flipping mechanism 14, the second appearance inspection mechanism 15, and the current-voltage detection mechanism 19. When the battery cell under test passes through the first appearance inspection mechanism 12, its first side faces upwards, and the first appearance inspection mechanism 12 inspects the appearance of the first side. When the battery cell under test passes through the flipping mechanism 14, the flipping mechanism 14 flips the battery cell under test so that its second side faces upwards. When the battery cell under test passes through the second appearance inspection mechanism 15, the second appearance inspection mechanism 15 inspects the appearance of the second side. When the battery cell under test passes through the current-voltage detection mechanism 19, the current-voltage detection mechanism 19 collects the performance data of the battery cell under test based on the detection results, and subsequently sorts the battery cells under test based on this data. The combination of the conveying mechanism 11, the first appearance inspection mechanism 12, the flipping mechanism 14, the second appearance inspection mechanism 15, and the current-voltage detection mechanism 19 can automatically complete the inspection process.

[0045] Furthermore, in this application, since the conveyor line 111 can support and transport the battery cell under test, and through the flipping action of the flipping mechanism 14, both the first appearance inspection mechanism 12 and the second appearance inspection mechanism 15 can be mounted upright above the battery cell under test, and respectively inspect the appearance of the first and second sides of the battery cell under test, thereby realizing automatic inspection of the appearance of the battery cell under test. This eliminates the need for Bernoulli suction cups, preventing the battery cell under test from being broken by suction and resulting in fragments and scattering. The probability of scratches on the surface of the battery cell under test is also reduced, the probability of malfunction of the detection device 100 is reduced, the alarm rate is reduced, and the device operates more stably.

[0046] Please refer to it again. Figure 1In some embodiments, the testing device 100 includes a rejection mechanism 13, which is disposed between the first appearance inspection mechanism 12 and the flipping mechanism 14, and is electrically connected to the first appearance inspection mechanism 12. The rejection mechanism 13 is used to remove the battery cells to be tested that are deemed unqualified in appearance by the first appearance inspection mechanism 12 from the conveyor line 111. In this way, after the first appearance inspection mechanism 12 has inspected the battery cells, the battery cells that are unqualified in appearance on the first side can be removed, so as to prevent the battery cells that are unqualified in appearance on the first side from flowing into subsequent processes and affecting the testing efficiency of the testing device 100, and to make the testing device 100 more versatile.

[0047] The material rejection mechanism 13 is a conventional technical means in this field, and its specific structure is not limited here.

[0048] In some embodiments, the testing device 100 further includes a rotating mechanism 18, a first conveying mechanism 17, and a second conveying mechanism 21. The rotating mechanism 18 has a rotating disk. The first conveying mechanism 17 is electrically connected to the second appearance inspection mechanism 15 and is used to transfer the battery cell to be tested that has been detected as having acceptable appearance by the second appearance inspection mechanism 15 onto the rotating disk. The rotating disk drives the battery cell to be tested to rotate to the detection area of ​​the current-voltage detection mechanism 19 for detection. After the battery cell to be tested is detected, it drives the battery cell to continue rotating in its original direction and move it out of the detection area of ​​the current-voltage detection mechanism 19. The second conveying mechanism 21 is used to transport the battery cell to be tested that has moved out of the detection area of ​​the current-voltage detection mechanism 19 to a position downstream of the current-voltage detection mechanism 19 on the conveyor line 111.

[0049] As an example, the first transport mechanism 17 and the second transport mechanism 21 are distributed on one side of the conveyor line 111 along a direction intersecting the transport direction of the conveyor line 111. The first transport mechanism 17 can be a robot performing three-axis or four-axis motion. Using the first transport mechanism 17 to transfer the battery cell to be tested and load it onto the rotating mechanism 18 offers high precision, high speed, and stable operation. The second transport mechanism 21 can be a three-axis manipulator with a suction cup. The first transport mechanism 17 and the second transport mechanism 21 are conventional configurations in the art and are not specifically limited here.

[0050] There are various ways to implement the rotating mechanism 18 described above, as long as it can drive the battery cell under test to rotate. This embodiment does not limit the implementation of the rotating mechanism 18. In one possible implementation, the rotating mechanism 18 further includes a rotating drive component, which is rotatably connected to the rotating disk and drives the rotating disk to rotate.

[0051] In actual operation, after the second appearance inspection mechanism 15 detects that the second side of the battery cell under test is qualified, the conveyor line 111 transports the battery cell under test to the range that the first handling mechanism 17 can hold. Then, the second handling mechanism 21 picks up the battery cell under test and moves it off the conveyor line 111 to place it on a rotating disk. Next, the rotating disk rotates the battery cell to the detection area of ​​the current-voltage detection mechanism 19, which then performs the detection. After the current-voltage detection mechanism 19 finishes its detection, the rotating disk continues to rotate in the original direction, and the battery cell under test moves out of the detection area of ​​the current-voltage detection mechanism 19. After this, the second handling mechanism 21 transports the battery cell under test to a position downstream of the current-voltage detection mechanism 19 on the conveyor line 111, so that the battery cell under test can flow to the next process under the action of the conveyor line 111.

[0052] In this embodiment, the rotating mechanism 18, the current-voltage detection mechanism 19, the first transport mechanism 17, and the second transport mechanism 21 are arranged in a compact manner, which helps to reduce the space occupied by the detection device 100. Moreover, the rotating mechanism 18, the current-voltage detection mechanism 19, the first transport mechanism 17, and the second transport mechanism 21 work together to realize the automatic detection of the current-voltage of the battery cell under test. The detection device 100 has a variety of detection items and a wide range of applications.

[0053] In some embodiments, the detection device 100 further includes a visual positioning mechanism 16, which is disposed between the second appearance detection mechanism 15 and the rotation mechanism 18 and is electrically connected to the first transport mechanism 17. The first transport mechanism 17 is used to transfer the battery cell to be tested, which is detected by the second appearance detection mechanism 15 as having qualified appearance, to the visual positioning mechanism 16 and is detected by the visual positioning mechanism 16, onto the rotating disk.

[0054] The visual positioning mechanism 16 can be, but is not limited to, a CMOS (Complementary Metal-Oxide-Semiconductor) sensor and a CCD (Charge Coupled Device) sensor, etc., and can be specifically set according to requirements.

[0055] In actual operation, when a battery cell with a qualified appearance on the second side flows into the visual positioning area of ​​the visual positioning mechanism 16, the visual positioning mechanism 16 detects the battery cell. Then, the first transport mechanism 17 transports the battery cell under test from the visual positioning area of ​​the visual positioning mechanism 16 to the rotating mechanism 18 for subsequent current-voltage detection. It can be understood that in this embodiment, the visual positioning area of ​​the visual positioning mechanism 16 is within the reachable range of the first transport mechanism 17. With the help of the visual positioning mechanism 16, the battery cell under test can be picked up and transported promptly when it enters its reachable range, improving the transport efficiency of the first transport mechanism 17.

[0056] In some embodiments, the testing device 100 further includes a defective cell storage box 22, which stores battery cells that are detected as having unacceptable appearance by the second appearance inspection mechanism 15. The first conveying mechanism 17, when a battery cell detected as having unacceptable appearance by the second appearance inspection mechanism 15 is detected by the visual positioning mechanism 16, transfers the battery cell detected by the visual positioning mechanism 16 into the defective cell storage box 22 to prevent the unacceptable battery cells from flowing to subsequent processes and affecting the testing efficiency of the testing device 100.

[0057] As an example, the defective piece storage box 22 is located on the same side of the conveyor line 111 as the first handling mechanism 17.

[0058] In some embodiments, the testing device 100 further includes a standard sample storage box 23 for storing standard battery cells; the first conveying mechanism 17 is used to convey the standard battery cells in the standard sample storage box 23 to a rotating disk before the testing device 100 starts testing the battery cells to be tested. The rotating disk drives the standard battery cells to rotate to the detection area of ​​the current-voltage detection mechanism 19 for testing, and obtains the standard parameters of the standard battery cells. The standard parameters are used to compare with the actual parameters of the battery cells to be tested obtained by the current-voltage detection mechanism 19.

[0059] As an example, the standard sample storage box 23 is located on the same side of the conveyor line 111 as the first handling mechanism 17.

[0060] As an example, in this embodiment, the detection device 100 can be provided with four stations: a loading station 20, a current-voltage detection station 30, a first unloading station 40, and a second unloading station 50. These four stations are arranged at intervals along the circumference of the rotating disk. Furthermore, the loading station 20 and the first unloading station 40 are arranged at intervals along a direction parallel to the conveying direction of the conveyor line 111, with the loading station 20 located within the reach of the first handling mechanism 17 and the first unloading station 40 located within the reach of the second handling mechanism 21. The second unloading station 50 and the current-voltage detection station 30 are arranged at intervals along the direction intersecting with the conveying direction of the conveyor line 111. The second unloading station 50 is located on the same side as the first conveying mechanism 17, and the current-voltage detection station 30 is located in the detection area of ​​the current-voltage detection mechanism 19 within the reach of the first conveying mechanism 17.

[0061] Before the testing device 100 tests the standard battery cell to be tested, the first transport mechanism 17 picks up the standard battery cell from the standard cell storage box 23 and places it in the area where the rotating disk is located at the loading station 20. Then, the rotating disk drives the standard battery cell to rotate to the current-voltage detection station 30, so that the current-voltage detection mechanism 19 can test the standard battery cell and record its standard parameters. Afterward, the rotating disk drives the standard battery cell through the first unloading station 40 to the second unloading station 50, and the first transport mechanism 17 transfers the standard battery cell located at the second unloading station 50 back into the standard cell storage box 23 for storage.

[0062] When the testing device 100 tests the battery cell under test, the first transport mechanism 17 picks up the battery cell under test from the visual positioning area of ​​the visual positioning mechanism 16 and places it in the area where the rotating disk is located at the loading station 20. Then, the rotating disk drives the battery cell under test to rotate to the current-voltage detection station 30, so that the current-voltage detection mechanism 19 can test the battery cell under test and obtain the actual parameters of the battery cell under test. The current-voltage detection mechanism 19 compares the actual parameters of the battery cell under test with the standard parameters of the standard battery cell and knows the performance data of the battery cell under test. Subsequently, the battery cell under test is sorted according to these data. After the current-voltage detection mechanism 19 finishes testing, the rotating disk drives the battery cell under test to the first unloading station 40. Then, the second transport mechanism 21 transports the battery cell under test located at the first unloading station 40 to the conveyor line 111 for continued circulation.

[0063] The standard cell storage box 23 stores standard cells, so the testing device 100 can use the first conveying mechanism 17, the rotating mechanism 18 and the current-voltage detection mechanism 19 to obtain the standard parameters of the standard cells as needed, so as to provide parameter basis for subsequent sorting of the cells to be tested.

[0064] Specifically, the standard solar cell is a first-level standard cell of the same type as the solar cell under test, calibrated by a professional organization. The current-voltage detection mechanism 19 detects various standard parameters of the standard solar cell, which facilitates subsequent comparison with the solar cell under test, thereby determining the grade standard of the solar cell under test.

[0065] In some embodiments, the detection device 100 further includes a polishing storage box 24 for storing polishing parts; the current-voltage detection mechanism 19 has a probe, and the first conveying mechanism 17 is used to convey the polishing parts in the polishing storage box 24 to a rotating disk when the probe needs to be polished, and the rotating disk drives the polishing parts to rotate to the detection area of ​​the current-voltage detection mechanism 19 to polish the probe.

[0066] As an example, the polishing storage box 24 and the first conveying mechanism 17 are located on the same side of the conveyor line 111.

[0067] Specifically, after a period of use, the probe's surface may develop imperfections, or the probe's orifice may become clogged. In this case, a polishing tool is needed to polish the probe's surface to ensure a smooth and flat surface and unobstructed probe orifice, guaranteeing normal testing. It can be understood that the probe's orifice helps obtain the actual parameters of the battery cell under test by measuring parameters such as pressure and current of the electrical signal flowing through the probe. The polishing tool can be, but is not limited to, sandpaper.

[0068] Specifically, the running path of the grinding part on the rotating disk is the same as that of the standard solar cell on the rotating disk, so it will not be described again here.

[0069] As mentioned above, the first conveying mechanism 17 can transfer the test cell, the standard cell, and the polished part. This design simplifies the structure of the testing device 100 and reduces the cost of the testing device 100.

[0070] In some embodiments, the detection device 100 further includes a photoluminescence detection mechanism 25, which is disposed downstream of the current-voltage detection mechanism 19 along the conveying direction of the conveyor line 111. The photoluminescence detection mechanism 25 is used to detect the battery cell under test passing through its detection area.

[0071] Photoluminescence (PL) testing involves illuminating a solar cell under test, causing it to fluoresce, and then measuring the spectrum and intensity of this fluorescence to analyze information such as the cell's composition, structure, and defects. In the photovoltaic industry, PL testing is a non-contact testing solution based on the photoluminescence principle, capable of detecting and analyzing various stages of the solar cell's manufacturing process. This method can quickly and effectively locate problems in the production process, providing a reliable guarantee for product quality.

[0072] The inclusion of the photoluminescence detection mechanism 25 increases the types of detection processes available in the detection device 100, thus enabling the device to function as a multi-functional unit. It is worth noting that the data parameters obtained by the photoluminescence detection mechanism 25 also provide a basis for the subsequent sorting of the solar cells to be tested.

[0073] In some embodiments, the detection device 100 further includes a third transport mechanism 26 and a return mechanism 27. The third transport mechanism 26 is disposed downstream of the photoluminescence detection mechanism 25 along the transport direction of the transport line 111. The return mechanism 27 is located on the same side of the transport line 111 as the first transport mechanism 17. The return mechanism 27 includes a return line 271, which is parallel to and spaced apart from the transport line 111 along a direction intersecting the transport direction of the transport line 111. The third transport mechanism 26 is used to transfer the tested battery cell that has been detected by the photoluminescence detection mechanism 25 to the return line 271. The return line 271 is used to transport the tested battery cell in a direction opposite to the transport direction of the transport line 111. The first transport mechanism 17 is used to transport the tested battery cell on the return line 271 to a rotating disk, so that the tested battery cell can be rotated to the detection area of ​​the current-voltage detection mechanism 19 for re-inspection under the drive of the rotating disk.

[0074] Specifically, the third handling mechanism 26 can be, but is not limited to, a three-axis robot, a four-axis robot, etc., and can be set according to the requirements.

[0075] The return mechanism 27 may include, but is not limited to, a return line 271, which may be a timing belt, a belt, etc.

[0076] Depending on the actual testing results of the battery cell under test, choose whether or not to use the return line 271.

[0077] When the cell under test only needs to undergo one current-voltage detection and one photoluminescence detection, the cell under test is unloaded and sorted after passing through the current-voltage detection and photoluminescence detection in sequence.

[0078] When the battery cell under test needs to undergo multiple current-voltage tests and / or multiple photoluminescence tests, after the battery cell under test has undergone current-voltage and photoluminescence tests, the third transport mechanism 26 transports the battery cell under test from the conveyor line 111 to the return line 271. Under the action of the return line 271, the battery cell under test flows back to the holding range of the first transport mechanism 17. Then, the first transport mechanism 17 transfers the battery cell under test to the area of ​​the rotating disk located at the loading station 20. Under the rotation of the rotating disk, it passes through the current-voltage test station 30 and the first loading station 20 in sequence. Then, the second transport mechanism 21 transports it back to the conveyor line 111, and then it flows through the photoluminescence test area. This cycle continues until the number of current-voltage and photoluminescence tests of the battery cell under test reaches the required number.

[0079] By setting up a third transport mechanism 26 and a return line 271, the test cells can be automatically returned and multiple current-voltage and / or photoluminescence detections can be performed without human intervention, making the detection more intelligent and efficient.

[0080] In some embodiments, the detection device 100 further includes a buffer mechanism 28, which is disposed on the transport path of the battery cell under test on the return line 271 and is used to receive and buffer the battery cell under test when it flows through the buffer area of ​​the buffer mechanism 28 on the return line 271.

[0081] When there are too many cells to be tested on the return line 271, and the first transport mechanism 17 cannot transport them to the rotating disk in time, the buffer mechanism 28 receives and buffers the cells to be tested. When there are an appropriate number of cells to be tested on the return line 271, the buffer mechanism 28 releases the buffered cells, or the buffer mechanism 28 stops working, so that the cells to be tested released by the buffer mechanism 28 or transported on the return line 271 can be transported to the rotating disk in an orderly manner by the first transport mechanism 17, and then re-inspected by the current-voltage detection mechanism 19 and / or the photoluminescence detection mechanism 25. The setting of the buffer mechanism 28 improves the reliability of the detection device 100.

[0082] As an example, the buffer mechanism 28 may include a lifting component and a buffer component, the lifting component being drively connected to the buffer component and used to drive the buffer component to move up and down along a third direction Z that intersects both the first direction X and the second direction Y. Figure 2 For example, the third direction Z is the up and down direction.

[0083] The buffer component may include, but is not limited to, a buffer timing belt. When it is necessary to buffer the battery cells under test, the lifting component drives the buffer timing belt to descend and align it with the return line 271. The buffer timing belt receives the battery cells under test and moves them in the same direction as the transport direction of the return line 271, so that the buffer timing belt can continuously receive the battery cells under test. When a certain number of battery cells under test are stored on the buffer timing belt, the buffer timing belt stops running, and the lifting component drives the buffer timing belt to rise to achieve buffering of the battery cells under test. When it is necessary to release the buffered battery cells under test, the lifting component drives the buffer timing belt to descend to a position aligned with the return line 271, and then the buffer timing belt moves again in the same direction as the transport direction of the return line 271 to transport the buffered battery cells under test onto the return line 271.

[0084] In some embodiments, the conveying mechanism 11, the first appearance inspection mechanism 12, the flipping mechanism 14, the second appearance inspection mechanism 15, the visual positioning mechanism 16, the rotating mechanism 18, the current-voltage detection mechanism 19, the first handling mechanism 17, the second handling mechanism 21, the photoluminescence detection mechanism 25, the polishing storage box 24, and the defective sheet storage box 22 are all arranged symmetrically about the same center line L. Furthermore, the standard sheet storage box 23, the return mechanism 27, and the third handling mechanism 26 can be axially symmetrical about the center line L, or they can be arranged symmetrically about the same center line L, depending on the specific requirements. For ease of explanation, the following embodiments will use the example of the standard sheet storage box 23, the return mechanism 27, and the third handling mechanism 26 being axially symmetrical about the center line L as an example.

[0085] Specifically, the testing device 100 includes two conveying mechanisms 11, two first appearance inspection mechanisms 12, two flipping mechanisms 14, two second appearance inspection mechanisms 15, two visual positioning mechanisms 16, two rotating mechanisms 18, two current-voltage detection mechanisms 19, two first handling mechanisms 17, two second handling mechanisms 21, two photoluminescence detection mechanisms 25, two polishing storage boxes 24, and two defective piece storage boxes 22. The two conveying mechanisms 11, two first appearance inspection mechanisms 12, two flipping mechanisms 14, two second appearance inspection mechanisms 15, two visual positioning mechanisms 16, two rotating mechanisms 18, two current-voltage detection mechanisms 19, two first handling mechanisms 17, two second handling mechanisms 21, two photoluminescence detection mechanisms 25, two polishing storage boxes 24, and two defective piece storage boxes 22 are all symmetrically arranged about the same symmetrical center line L. The testing device 100 includes a standard sample storage box 23, a reflux mechanism 27 and a third transport mechanism 26. The standard sample storage box 23, the reflux mechanism 27 and the third transport mechanism 26 are all axially symmetrical about the center line L.

[0086] The testing device 100 has two testing production lines 10. The testing production lines 10 are formed by a conveying mechanism 11, a first appearance inspection mechanism 12, a flipping mechanism 14, a second appearance inspection mechanism 15, a visual positioning mechanism 16, a rotating mechanism 18, a current-voltage detection mechanism 19, a first transport mechanism 17, a second transport mechanism 21, a photoluminescence detection mechanism 25, a polishing storage box 24, a defective piece storage box 22, a standard piece storage box 23, a return mechanism 27, and a third transport mechanism 26, all located on the same side of the symmetrical center line L. It is understood that the standard piece storage box 23, the return mechanism 27, and the third transport mechanism 26 are shared by both testing production lines 10. By setting up two testing lines 10, the testing efficiency of the testing device 100 can be improved. The standard sample storage box 23, the return mechanism 27 and the third transport mechanism 26 in the two testing lines 10 are shared, which can reduce the design of the standard sample storage box 23, the return mechanism 27 and the third transport mechanism 26, simplify the structure of the testing device 100 and reduce the manufacturing cost of the testing device 100.

[0087] In some embodiments, the two first conveying mechanisms 17, the two second conveying mechanisms 21, the two defective sheet storage boxes 22, the two polishing storage boxes 24, the standard sheet storage box 23 and the return line 271 are all located between the conveying lines 111 of the two conveying mechanisms 11. This design is beneficial to improving the compactness of the layout of the detection device 100.

[0088] The aforementioned testing device 100, because the conveyor line 111 can support and transport the battery cell under test, and through the flipping action of the flipping mechanism 14, allows both the first appearance inspection mechanism 12 and the second appearance inspection mechanism 15 to be mounted upright above the battery cell under test, and to inspect the appearance of the first and second sides of the battery cell respectively, thereby achieving automatic inspection of the appearance of the battery cell under test. This eliminates the need for Bernoulli suction cups, preventing the battery cell from being broken by suction and resulting in fragments or scattering, reducing the probability of scratches on the surface of the battery cell, decreasing the probability of malfunction of the testing device 100, reducing the alarm rate, and making the device operation more stable.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A detection device, characterized in that, The detection device comprises a conveying mechanism (11), a first appearance detection mechanism (12), a turnover mechanism (14), a second appearance detection mechanism (15) and a current-voltage detection mechanism (19); The conveying mechanism (11) comprises a conveying line (111) for supporting and conveying the battery pieces to be detected, the first appearance detection mechanism (12), the turnover mechanism (14), the second appearance detection mechanism (15) and the current-voltage detection mechanism (19) are arranged along the conveying direction of the conveying line (111), and the turnover mechanism (14) is used to drive the battery pieces to be detected to overturn so as to exchange the positions of the first face and the second face of the battery pieces to be detected.

2. The detection device of claim 1, wherein, The detection device further comprises a rotating mechanism (18), a first conveying mechanism (17) and a second conveying mechanism (21), the rotating mechanism (18) has a rotating disc, the first conveying mechanism (17) is electrically connected with the second appearance detection mechanism (15) and is used to move the battery pieces to be detected, which are detected as qualified in appearance by the second appearance detection mechanism (15), to the rotating disc, the rotating disc drives the battery pieces to be detected to rotate to the detection area of the current-voltage detection mechanism (19) for detection, and after the detection of the battery pieces to be detected is completed, the rotating disc drives the battery pieces to be detected to continue rotating in the original direction and move out of the detection area of the current-voltage detection mechanism (19), and the second conveying mechanism (21) is used to convey the battery pieces to be detected, which move out of the detection area of the current-voltage detection mechanism (19), to the conveying line (111) at a position downstream of the current-voltage detection mechanism (19).

3. The detection device of claim 1, wherein, The detection device further comprises a visual positioning mechanism (16) arranged between the second appearance detection mechanism (15) and the rotating mechanism (18) and electrically connected with the first conveying mechanism (17), the first conveying mechanism (17) is used to move the battery pieces to be detected, which are detected as qualified in appearance by the second appearance detection mechanism (15), to the rotating disc when the battery pieces to be detected are conveyed to the visual positioning mechanism (16) and detected by the visual positioning mechanism (16).

4. The detection device of claim 3, wherein, The detection device further comprises an unqualified piece storage box (22) for storing the battery pieces to be detected, which are detected as unqualified in appearance by the second appearance detection mechanism (15); 5. The detection device of claim 4, wherein, The detection device further comprises an unqualified piece storage box (22) for storing the battery pieces to be detected, which are detected as unqualified in appearance by the second appearance detection mechanism (15); The first conveying mechanism (17) is used for moving the battery piece to be tested detected by the visual positioning mechanism (16) into the unqualified piece storage box (22) when the battery piece to be tested detected by the visual positioning mechanism (16) is detected as being unqualified by the second appearance detection mechanism (15).

6. The detection device of claim 3, wherein, The detection device further comprises a standard piece storage box (23) for storing standard battery pieces; The first conveying mechanism (17) is used for conveying the standard battery pieces in the standard piece storage box (23) to the rotating disc before the detection device starts detecting the battery piece to be tested, the rotating disc drives the standard battery pieces to rotate to the detection area of the current-voltage detection mechanism (19) for detection, and the standard parameters of the standard battery pieces are obtained, which are used for comparison with the actual parameters of the battery piece to be tested obtained by the current-voltage detection mechanism (19).

7. The detection device of claim 3, wherein, The detection device further comprises a polishing storage box (24) for storing polishing pieces; The current-voltage detection mechanism (19) has a probe, and the first conveying mechanism (17) is used for conveying the polishing pieces in the polishing storage box (24) to the rotating disc when the probe needs to be polished, and the rotating disc drives the polishing pieces to rotate to the detection area of the current-voltage detection mechanism (19) to polish the probe.

8. The detection device of claim 3, wherein, The detection device further comprises a photoluminescence detection mechanism (25) arranged downstream of the current-voltage detection mechanism (19) along the conveying direction of the conveying line (111), and the photoluminescence detection mechanism (25) is used for detecting the battery piece to be tested passing through the detection area thereof.

9. The detection device of claim 8, wherein, The detection device further comprises a third conveying mechanism (26) and a reflow mechanism (27), the third conveying mechanism (26) is arranged downstream of the photoluminescence detection mechanism (25) along the conveying direction of the conveying line (111), and the reflow mechanism (27) comprises a reflow line (271) arranged in parallel with and spaced from the conveying line (111) along a direction intersecting the conveying direction of the conveying line (111); The third conveying mechanism (26) is used for moving the battery piece to be tested detected by the photoluminescence detection mechanism (25) to the reflow line (271), the reflow line (271) is used for conveying the battery piece to be tested in a direction opposite to the conveying direction of the conveying line (111), and the first conveying mechanism (17) is used for conveying the battery piece to be tested on the reflow line (271) to the rotating disc, so that the battery piece to be tested can be rotated to the detection area of the current-voltage detection mechanism (19) for re-inspection under the driving of the rotating disc.

10. The detection device of claim 9, wherein, The detection device further comprises a buffering mechanism (28) arranged on a conveying path of the battery piece to be detected on the return flow line (271) and used for receiving and buffering the battery piece to be detected when the battery piece to be detected on the return flow line (271) flows through a buffering area of the buffering mechanism (28).

11. The detection device of claim 10, wherein, The conveying mechanism (11), the first appearance detection mechanism (12), the turnover mechanism (14), the second appearance detection mechanism (15), the rotating mechanism (18), the current-voltage detection mechanism (19), the first carrying mechanism (17), the second carrying mechanism (21) and the photoluminescence detection mechanism (25) are symmetrically arranged in pairs about a same symmetry center line (L).

12. The detection device of claim 11, wherein, The two first carrying mechanisms (17) and the two second carrying mechanisms (21) are located between the conveying lines (111) of the two conveying mechanisms (11).

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