A high-precision IV detection device and detection method for solar cells

Abstract

The present invention discloses a high-precision battery cell IV detection device and a detection method, which include a rotating unit, a loading station, a first photographing station, a detection station and an unloading station arranged around the rotating unit, a plurality of first cameras arranged at the first photographing station, a detection unit arranged at the detection station, a loading conveyor line connected to the loading station, a second photographing station corresponding to the tail section of the loading conveyor line, a second camera arranged at the second photographing station and located below the loading conveyor line, a deviation-correcting loading handling mechanism that adjusts the battery cell to a set state from the second photographing station according to the position information obtained by the second camera and then conveys and places it at the loading station, an unloading conveyor line connected to the unloading station, and an unloading handling mechanism that conveys the battery cell from the unloading station to the unloading conveyor line. The present invention can achieve high-precision and high-density grid line conduction testing and reduce the risk of battery hidden cracks.

Description

Technical Field

[0001] The present invention belongs to the technical field of solar cell manufacturing equipment, and particularly relates to a high-precision solar cell IV detection device and a detection method. Background Art

[0002] After the solar cells are manufactured, they need to be graded according to their own photoelectric conversion efficiency to maximize the benefits. The detection of the photoelectric conversion efficiency of solar cells is called IV test in the industry. In order to improve the production efficiency of solar cells, a large number of automatic solar cell IV test devices have emerged on the market.

[0003] In the prior art, patent CN218841009U discloses a double half-cell solar cell efficiency detection device, which uses a rotating mechanism to realize the position transfer of solar cells between the loading station, the testing station and the unloading station. A vision camera is arranged at the loading station and cooperates with an adjustment mechanism to realize the precise deviation correction of the position of the solar cell. At the testing station, the upper probe row and the lower probe row which are opposite to each other are used to clamp the solar cell from top and bottom by approaching each other, so as to realize the electrical conduction with the grid lines on the upper and lower surfaces of the solar cell, and then realize the IV detection of the solar cell. However, this detection device has the following disadvantages:

[0004] (1) There are four stations arranged around the turntable, but only three of them are actually in use, resulting in waste of stations;

[0005] (2) For the structure of solar cells with connection grid lines arranged on both sides, there is enough space in the upper and lower surface areas of the solar cell to layout the upper probe row and the lower probe row, and there is a large error tolerance to ensure the contact conduction between the probes and the grid electrodes; but for the solar cells with the upper and lower surface grid lines integrated on one surface, the grid line distribution density on a single surface of the solar cell is doubled. On the one hand, it is impossible to layout the probes with corresponding density in the plane area of the solar cell. On the other hand, the contact accuracy requirement between the probes and the grid electrodes is higher, and this detection device cannot meet the higher-precision electrical conduction contact requirements;

[0006] (3) During the detection, the solar cell is clamped from top and bottom by the upper probe row and the lower probe row in relative positions. If the upper and lower contact points are not aligned, the upper and lower stress points of the solar cell are misaligned, and there is a great risk of hidden cracks; for the solar cells with grid lines on only one side, the grid line spacing is very small, the probe arrangement is very dense, the probe diameter is also very small, and it is more difficult for the upper and lower probes to be precisely aligned, so it is also easy to crush the solar cell.

[0007] Therefore, it is necessary to provide a new high-precision solar cell IV detection device and a detection method to solve the above technical problems. Summary of the Invention

[0008] The main object of the present invention is to provide a high-precision IV detection device for solar cells, which can achieve high-precision and high-density grid conduction testing and reduce the risk of hidden cracks in solar cells.

[0009] The present invention realizes the above object through the following technical solutions: A high-precision IV detection device for solar cells, comprising:

[0010] A rotating unit, around which a loading station, a first photographing station, a detection station and a unloading station are sequentially arranged; the rotating unit includes a rotating support plate performing a rotating motion and adsorption jigs arranged on the rotating support plate at equal angles, the adsorption jigs include adsorption support rods for adsorbing and supporting solar cells, and a plurality of suction nozzles are arranged on the adsorption support rods;

[0011] A plurality of first cameras, arranged at the first photographing station to photograph the solar cells and obtain first position information;

[0012] A detection unit, arranged at the detection station, includes a testing module performing a vertical motion, an XYR fine adjustment module for correspondingly adjusting the position of the testing module according to the first position information, and a flexible pressing module located above the testing module, the flexible pressing module includes a mounting plate performing a vertical motion and being vertically opposite to the testing module, and a plurality of pressing pins arranged on the mounting plate;

[0013] A loading conveyor line, arranged in butt joint with the loading station, and a second photographing station is correspondingly arranged at the tail section of the loading conveyor line;

[0014] A second camera, arranged at the second photographing station to photograph the solar cells on the loading conveyor line and obtain second position information;

[0015] A deviation correction loading handling mechanism, sucking the solar cells from the second photographing station according to the second position information, then transporting them to the loading station, and placing them on the adsorption jigs at a set attitude position;

[0016] An unloading conveyor line, arranged in butt joint with the unloading station;

[0017] An unloading handling mechanism, transporting the solar cells from the unloading station to the unloading conveyor line.

[0018] Further, the rotating unit includes a first driving member for driving the rotating support plate to perform a rotating motion;

[0019] A hollow working area is arranged on the rotating support plate corresponding to the position of the adsorption jigs, and the adsorption support rods are located in the working area.

[0020] Further, the rotation unit further includes a pneumatic slip ring rotatably connected to the rotation support plate; the adsorption jig includes a support frame, the support frame surrounds and forms the working area, and air paths are arranged inside the support frame and the adsorption support rod. One end of the air path is communicated with the suction nozzle, and the other end is communicated with the air nozzle on the pneumatic slip ring.

[0021] Further, the detection unit includes a second driving member, a first support plate driven by the second driving member to move up and down, and a light source arranged above the test module. The XYR fine adjustment module is arranged on the first support plate, and the test module is arranged at the movable end of the XYR fine adjustment module.

[0022] Further, the flexible pressing module includes a third driving member, a second support plate driven by the third driving member to move up and down, and the mounting plate is fixed on the second support plate; the pressing needles are arranged in an array corresponding to the positions of the grid line electrodes on the battery chip.

[0023] Further, the test module includes a mounting support fixed at the movable end of the XYR fine adjustment module, a support bottom plate fixed on the mounting support, and a test circuit board fixed on the support bottom plate.

[0024] Further, avoidance grooves for avoiding the adsorption support rod are arranged on the support bottom plate and the test circuit board; during IV detection, the support bottom plate rises to a set height, at which the adsorption support rod is located in the avoidance groove, and at the same time, the suction nozzle adsorbs the battery chip at a set height position above the test circuit board.

[0025] Further, the detection unit further includes a third camera for detecting appearance defects of the battery chip, and the third camera is located above the flexible pressing module; a hollow notch is arranged on the second support plate, the mounting plate is arranged corresponding to the position of the hollow notch, and the mounting plate is a light-transmitting material plate structure.

[0026] Further, the deviation correction and loading handling mechanism includes a UVW alignment platform, a third support plate arranged at the movable end of the UVW alignment platform, a fourth driving member fixed on the third support plate, a fourth support plate driven by the fourth driving member to move horizontally between the second photographing station and the loading station, a fifth driving member fixed on the fourth support plate, a fifth support plate driven by the fifth driving member to move up and down, and a plurality of suction cup assemblies arranged on the fifth support plate.

[0027] Another object of the present invention is to provide a high-precision battery chip IV detection method, which is realized based on the high-precision battery chip IV detection device as described above, and includes the following steps:

[0028] S1. The feeding conveyor transports the battery wafers to the second photographing station;

[0029] S2. The second camera photographs the battery wafers to obtain the second position information;

[0030] S3. The deviation-correcting feeding handling mechanism sucks the battery wafers from the second photographing station and transports them to the feeding station, and places the battery wafers on the adsorption fixture according to the set position and posture;

[0031] S4. The rotating unit carries the battery wafers and rotates from the feeding station to the first photographing station. The first camera photographs the battery wafers on the adsorption fixture to obtain the first position information;

[0032] S5. The rotating unit carries the battery wafers and rotates from the first photographing station to the detection station. The XYR fine-tuning module adjusts the test module to the set position state according to the first position information. Then the test module rises to the set height. At this time, the battery wafers are adsorbed and seated on the suction nozzles, and are located at a set height position above the test module. The pressure pins descend and press down the battery wafers, while compressing the suction nozzles, so that the lower surface grid electrodes of the battery wafers are in contact with the corresponding electrical connection points on the test circuit board on the test module to achieve electrical conduction, and IV detection is performed;

[0033] S6. After the detection is completed, the rotating unit carries the battery wafers and rotates from the detection station to the discharging station. The discharging handling mechanism sucks the battery wafers from the adsorption fixture and transports them to the discharging conveyor, realizing discharging.

[0034] Compared with the prior art, the beneficial effects of a high-precision battery wafer IV detection device and detection method of the present invention are as follows: high-precision and high-density grid conduction testing can be realized, and the risk of battery hidden cracks can be reduced. Specifically:

[0035] (1) A second camera is arranged at the end of the feeding conveyor to perform visual positioning on the battery wafers at the end of the feeding conveyor, and cooperate with the deviation-correcting feeding handling mechanism to achieve high-precision feeding of the battery wafers; cooperate with the first camera located at the second position in the rotating unit to perform visual positioning on the battery wafers in the adsorption fixture on the rotating unit, and cooperate with the XYR fine-tuning module located at the third position detection station in the rotating unit to perform high-precision automatic deviation correction on the test module, so as to ensure that after the battery wafers are moved to the detection station, higher-precision docking with the test module can be realized, thereby meeting the higher-precision docking conduction requirements;

[0036] (2) A loading station, a first photographing station, an inspection station, and an unloading station are sequentially arranged around the rotating unit. All four stations are effectively utilized, and there is no waste of stations.

[0037] (3) At the inspection station, a suction nozzle on the suction support rod in the adsorption fixture is used to form an elastic support platform. The solar cell is located on this elastic support platform. When the solar cell moves into place, the test module is raised to a set height. At this set height, the solar cell is located above the test circuit board. Then, in cooperation with the press pins in the flexible pressing module above, the solar cell is pressed downward, thereby compressing the suction nozzle and flexibly pressing the solar cell onto the test circuit board, ensuring effective and reliable contact between the grid line electrodes on the solar cell and the electrical connection points on the test circuit board. On the one hand, the stability and reliability of electrical contact conduction are improved, and on the other hand, the problem of hidden cracks caused by hard contact with the solar cell is effectively solved.

[0038] (4) In the test module, a test circuit board is used as the electrical conduction component for realizing electrical connection with the grid line electrodes of the solar cell. Compared with using probes for electrical conduction, a higher density of electrical connection points can be set, meeting the requirements of high-density electrical conduction. Description of the Drawings

[0039] Figure 1 It is a top view structural schematic diagram of an embodiment of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the rotating unit, the inspection unit, and the first camera of an embodiment of the present invention;

[0041] Figure 3 It is a structural schematic diagram of the rotating unit and the first camera in an embodiment of the present invention;

[0042] Figure 4 It is a side view structural schematic diagram of the inspection unit in an embodiment of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the flexible pressing module in an embodiment of the present invention;

[0044] Figure 6 It is a partial structural schematic diagram of the inspection unit in an embodiment of the present invention;

[0045] Figure 7 It is a structural schematic diagram of the cooperation of the test module, the adsorption support rod, and the press pins in an embodiment of the present invention;

[0046] Figure 8 It is a structural schematic diagram of the loading conveyor line, the deviation-correcting loading handling mechanism, and the second camera in an embodiment of the present invention;

[0047] Figure 9 It is a structural schematic diagram of the direction adjustment mechanism in an embodiment of the present invention;

[0048] The numbers in the figure indicate:

[0049] 100 - High-precision cell IV detection device; 200 - Cell;

[0050] 1 - Rotating unit, 11 - First driving member, 12 - Rotating support plate, 13 - Adsorbing fixture, 131 - Support frame, 1311 - Working area, 132 - Adsorbing support rod, 1321 - Suction nozzle, 14 - Pneumatic slip ring;

[0051] 2 - First camera, 21 - Lighting board, 22 - Fine adjustment module;

[0052] 3 - Detection unit, 31 - Second driving member, 32 - First support plate, 33 - Test module, 331 - Installation support, 332 - Support bottom plate, 333 - Test circuit board, 3331 - Avoidance groove, 34 - Light source, 35 - XYR fine adjustment module, 36 - Flexible pressing module, 361 - Third driving member, 362 - Second support plate, 3621 - Hollow notch, 363 - Installation plate, 364 - Pressing pin, 37 - Third camera;

[0053] 4 - Loading conveyor; 5 - Second camera;

[0054] 6 - Deviation correction loading handling mechanism, 61 - UVW alignment platform, 62 - Third support plate, 63 - Fourth driving member, 64 - Fourth support plate, 65 - Fifth driving member, 66 - Fifth support plate, 67 - Suction cup assembly;

[0055] 7 - Unloading conveyor; 8 - Unloading handling mechanism; 9 - Direction adjustment mechanism, 91 - Sixth driving member, 92 - Sixth support plate, 93 - Adsorbing assembly. Detailed implementation mode

[0056] Example 1:

[0057] Please refer to Figures 1-9, this embodiment is a high-precision cell IV detection device 100, which includes a rotation unit 1, a loading station, a first photographing station, a detection station, and a unloading station arranged around the rotation unit 1, several first cameras 2 arranged at the first photographing station, a detection unit 3 arranged at the detection station, a loading conveyor line 4 connected to the loading station, a second photographing station corresponding to the tail section of the loading conveyor line 4, a second camera 5 arranged at the second photographing station and located below the loading conveyor line 4, a deviation correction loading handling mechanism 6 that adjusts the cell 200 to a set state from the second photographing station and then transports and places it at the loading station according to the position information obtained by the second camera 5, a unloading conveyor line 7 connected to the unloading station, and a unloading handling mechanism 8 that transports the cell 200 from the unloading station to the unloading conveyor line 7.

[0058] The rotation unit 1 is mainly used to transfer the position of the cell 200 among the loading station, the first photographing station, the detection station, and the unloading station. The rotation unit 1 includes a first driving member 11, a rotation support plate 12 that rotates at equal angles under the drive of the first driving member 11, and adsorption jigs 13 arranged at equal angles on the rotation support plate 12 and used to adsorb the cell.

[0059] The adsorption jig 13 includes a support frame 131 fixed to one side of the rotation support plate 12 and projecting out of the rotation support plate 12, and several adsorption support rods 132 arranged on the support frame 131 for adsorbing and supporting the cell 200. The support frame 131 is a rectangular frame structure and surrounds to form a hollow working area 1311. The adsorption support rods 132 are arranged in the working area 1311, and several suction nozzles 1321 are arranged at intervals along the physical extension direction of the adsorption support rods 132.

[0060] In this embodiment, two groups of adsorption support rods 132 are provided, which respectively adsorb and support two cell half pieces. When the two cell half pieces are placed on the adsorption support rods 132, the whole is located within the working area 1311, and there is a certain distance between adjacent two cell half pieces. One end of the adsorption support rod 132 is fixed to the main body of the support frame 131 and the other end projects out towards the working area 1311.

[0061] In other embodiments, the adsorption support rods 132 can also be provided only corresponding to one whole cell, arranged around the contour of the whole cell. For example, two groups are arranged to support the relative two side edges of the whole cell, or four groups are arranged to support the four peripheral edges of the whole cell, or multiple groups are arranged to support the bottom area of the whole cell.

[0062] Since the rotating unit 1 rotates at a high frequency in one direction and the adsorption support rod 132 needs to be ventilated, in order to facilitate tracheal connection and prevent tracheal entanglement, the rotating unit 1 further includes a pneumatic slip ring 14 rotatably connected to the rotating support plate 12. An air passage (not marked in the figure) is provided inside the support frame 131 and the adsorption support rod 132. One end of the air passage communicates with the suction nozzle 1321 and the other end communicates with the air nozzle on the pneumatic slip ring 14.

[0063] In this embodiment, eight groups of first cameras 2 are provided, corresponding to the four corner positions of two battery half-sheets, for accurately obtaining the position information of the battery sheet 200 on the adsorption jig 13 to guide the position adjustment of the circuit board in the subsequent detection unit 3. A lighting board 21 for lighting is provided above the first camera 2. A fine-tuning module 22 is provided below each first camera 2, and the first camera 2 is installed on the movable end of the fine-tuning module 22 for fine-tuning the horizontal position of the first camera 2. The fine-tuning module 22 can be set to adjust one or more combinations of the X-axis, Y-axis, and Z-axis according to requirements.

[0064] In other embodiments, the rotating support plate 12 can also be directly designed as a disc structure, the support frame 131 is integrally designed into the disc structure, and a rectangular slot is opened in the disc structure to form a working area 1311.

[0065] The detection unit 3 includes a second driving member 31, a first support plate 32 driven by the second driving member 31 to move up and down, a test module 33 provided on the first support plate 32 and used to contact the upper grid line electrode of the battery sheet, and a light source 34 provided above the test module 33 for irradiating the battery sheet according to set requirements.

[0066] In order to adapt to the high-density grid line distribution on the battery sheet, the structure of the detection unit 3 is optimized in this embodiment. Specifically, the detection unit 3 further includes an XYR fine-tuning module 35 provided on the first support plate 32 for accurately fine-tuning the position of the test module 33 according to the battery sheet position information obtained by the first camera 2, and the test module 33 is provided at the movable end of the XYR fine-tuning module 35.

[0067] In order to reduce the risk of hidden cracks caused by hard squeezing and clamping of the battery sheet, the structure of the detection unit 3 is also optimized in this embodiment. Specifically:

[0068] First, the detection unit 3 further includes a flexible pressing module 36 located above the test module 33. The flexible pressing module 36 includes a third driving member 361, a second support plate 362 driven by the third driving member 361 to move up and down, a mounting plate 363 fixed on the second support plate 362 and opposite to the test module 33 up and down, and a plurality of pressing needles 364 provided on the mounting plate 363.

[0069] In this embodiment, the pressing pin 364 is different from the probe used in the prior art for realizing electrical conduction with the grid electrode. The pressing pin 364 in the flexible pressing module 36 is only used to press down the position near the grid electrode or the position corresponding to the grid electrode on the battery cell 200, and cooperate with the testing module 33 and the adsorption fixture 13 to realize the flexible contact between the battery cell 200 and the circuit board on the testing module 33, effectively avoiding the occurrence of hidden crack phenomenon caused by hard contact between the upper and lower surfaces of the battery cell.

[0070] Secondly, the testing module 33 includes a mounting support 331 fixed to the movable end of the XYR fine adjustment module 35, a support base plate 332 fixed to the mounting support 331, and a testing circuit board 333 fixed to the support base plate 332. The testing circuit board 333 is used to fabricate high-density electrical contact points, solve the problem that high-density probes cannot be arranged in the plane area of the battery cell, and meet the high-density electrical conduction IV testing requirements of the single-sided grid electrode battery cell.

[0071] Finally, the support base plate 332 and the testing circuit board 333 are provided with avoidance grooves 3331 for avoiding the adsorption support rods 132. During the test, the support base plate 332 rises to a set height. At this set height, the adsorption support rods 132 are located in the avoidance grooves 3331. At the same time, the suction nozzle 1321 adsorbs the battery cell 200 at a set height position above the testing circuit board 333, and this set height is within the height range where the suction nozzle 1321 can be compressed; at this time, the battery cell 200 is substantially arranged on an elastic support platform formed by the suction nozzle 1321. The battery cell 200 is pressed down by the pressing pin 364, and the battery cell 200 is pressed by the pressing pin 364, thereby compressing the suction nozzle 1321 until the battery cell 200 is attached to the testing circuit board 333, realizing the flexible elastic contact between the grid electrode on the lower surface of the battery cell 200 and the testing circuit board 333, and effectively avoiding the hidden crack problem caused by hard contact.

[0072] When accurately positioning the testing module 33, after the first camera 2 finishes taking pictures, during the process of the battery cell 200 rotating from the first photographing station to the detection station, the XYR fine adjustment module 35 adjusts its position first. After the battery cell 200 rotates in place, the flexible pressing module 36 can directly perform the pressing test, with a faster beat.

[0073] In addition, in this embodiment, the detection unit 3 further includes a third camera 37 for detecting the appearance defects of the battery cell 200. The third camera 37 is located above the flexible pressing module 36. A hollow notch 3621 is provided on the second support plate 362 in this embodiment. The mounting plate 363 is arranged corresponding to the position of the hollow notch 3621, and the mounting plate 363 is a light-transmitting material plate structure. The hollow notch 3621 facilitates exposing the area where the battery cell is located; by setting the mounting plate 363 as a light-transmitting material, it is convenient for the light emitted by the light source 34 to pass through and then irradiate on the battery cell. When the third camera 37 performs appearance defect detection, the mounting plate 363 is in a high position to avoid blocking the third camera 37 from obtaining an image of the battery cell. The light source 34 is lit, and the emitted light passes through the light-transmitting mounting plate 363 and irradiates on the battery cell. The third camera 37 takes a picture of the battery cell to achieve appearance defect detection.

[0074] The second driving member 31, the first support plate 32, the XYR fine adjustment module 35, and the test module 33 together form a test and correction module. In this embodiment, two such test and correction modules are provided at the detection station to respectively adjust the positions of the two test modules 33 and simultaneously perform IV detection on the two battery half-cells.

[0075] On both sides of the loading conveyor 4, there are left and right alignment modules (not marked in the figure) for aligning the left and right positions of the battery cell 200; the conveyor belt body of the last conveying section of the loading conveyor 4 is cantilevered out by a support rod, and the second camera 5 is arranged below the last conveying section. By cantilevering out the conveyor belt body of the last conveying section, there is no obstruction below this conveying section, so that the second camera 5 can take pictures and identify the position of the battery cell in this conveying section.

[0076] The deviation correction loading and handling mechanism 6 includes a UVW alignment platform 61, a third support plate 62 arranged at the movable end of the UVW alignment platform 61, a fourth driving member 63 fixed on the third support plate 62, a fourth support plate 64 driven by the fourth driving member 63 to move horizontally between the tail section of the loading conveyor 4 and the loading station, a fifth driving member 65 fixed on the fourth support plate 64, a fifth support plate 66 driven by the fifth driving member 65 to move up and down, and a plurality of suction cup assemblies 67 arranged on the fifth support plate 66.

[0077] The UVW alignment platform 61 is used for the suction cup assembly 67 to adsorb the battery cell 200 for position and attitude adjustment in three directions of X, Y, and R; the fourth driving member 63 is used to drive the suction cup assembly 67 to adsorb the battery cell 200 at the end of the loading conveyor 4 and transport it to the loading station.

[0078] The deviation correction and loading handling mechanism 6 obtains the position and attitude of the battery chip 200 on the loading conveyor line 4 according to the second camera 5, then adsorbs the battery chip 200 according to the set adsorption position requirements, and then adjusts it to the set attitude and transports it to the loading station, and places it on the adsorption fixture 13.

[0079] In this embodiment, through the cooperation of the second camera 5 and the deviation correction and loading handling mechanism 6, the first position deviation correction adjustment of the battery chip 200 is realized. Then, through the cooperation of the first camera 2 and the XYR fine adjustment module 35 in the detection unit 3, the position deviation correction adjustment of the test module 33 is carried out to match the position of the battery chip at the detection station. Through the position positioning of the two vision cameras and the corresponding position deviation correction adjustments, the accuracy of the final electrical conduction achieved by the contact between the test module 33 and the surface grid lines of the battery chip 200 is greatly improved, meeting the electrical conduction contact requirements with higher accuracy requirements. In addition, by adopting two vision positioning and automatic deviation correction adjustment operations, compared with directly performing vision positioning on the battery chip on the rotating unit 1 and then adjusting the position of the test module 33, the efficiency of deviation correction adjustment is higher under the premise of meeting the same accuracy requirements, and thus the overall detection efficiency of the equipment can be improved.

[0080] Since the direction of the battery chip 200 is 90 degrees different from the direction of the battery chip incoming material on the loading conveyor line 4 after being transported from the unloading station, therefore, in order to restore the direction of the battery chip 200 on the conveyor line, a direction adjustment mechanism 9 for adjusting the battery chip 200 to be in the same direction as the incoming material direction is also provided beside the unloading conveyor line 7. The direction adjustment mechanism 9 includes a sixth driving member 91, a sixth support plate 92 driven by the sixth driving member 91 to rotate around a vertical axis, and an adsorption assembly 93 fixed on the sixth support plate 92. In this embodiment, the adsorption assembly 93 adopts a Bernoulli chuck, and the non-contact adsorption method is used with the battery chip 200. During adsorption, the battery chip 200 is slightly lifted upward (for example, 1-2 mm), separated from the conveying surface of the unloading conveyor line 7, and then the sixth driving member 91 drives the sixth support plate 92 to rotate 90 degrees to realize the direction adjustment and restoration of the battery chip 200. In this embodiment, two groups of adsorption assemblies 93 are provided on the sixth support plate 92 to simultaneously complete the direction adjustment of two battery half chips.

[0081] In other embodiments, the direction adjustment mechanism 9 can also be configured with a separate lifting driving function to drive the sixth support plate 92 to move up and down to realize the picking and placing of the battery chip 200.

[0082] This embodiment also provides a high-precision battery chip IV detection method, which includes the following steps:

[0083] S1. The loading conveyor line 4 transports the battery chip 200 to the second photographing station; wherein, the battery chip 200 can be a whole battery chip or two battery half chips; this embodiment does not make a limitation;

[0084] S2. Take a picture of the battery cell 200 through the second camera 5 to obtain the second position information;

[0085] S3. The deviation correction loading and handling mechanism 6 adjusts the position of the suction cup assembly 67 according to the second position information, sucks the battery cell 200 according to the set requirements, and transports it to the loading station, and places it on the adsorption fixture 13 of the rotating unit 1; or after the deviation correction loading and handling mechanism 6 sucks the battery cell 200 through the suction cup assembly 67, then adjusts the position of the battery cell 200 to the set posture according to the second position information, and then transports it to the loading station and places it on the adsorption fixture 13 of the rotating unit 1;

[0086] S4. The rotating unit 1 carries the battery cell 200 and rotates from the loading station to the first photographing station. The first camera 2 takes a picture of the battery cell 200 on the adsorption fixture 13 to obtain the first position information;

[0087] S5. The rotating unit 1 carries the battery cell 200 and rotates from the first photographing station to the detection station. During this process, the XYR fine adjustment module 35 adjusts the test module 33 to the set position state according to the first position information, and then the test module 33 rises to the set height. At this time, the battery cell 200 is adsorbed and seated on the suction nozzle 1321, and is located at a set height position above the test circuit board 333 in the test module 33. The pressure pin 364 in the flexible pressing module 36 descends and presses the battery cell 200 downward, while compressing the suction nozzle 1321, so that the battery cell 200 is attached to the surface of the test circuit board 333, realizing the contact between the grid line electrodes on the lower surface of the battery cell 200 and the corresponding electrical connection points on the test circuit board 333 to achieve electrical conduction, and performing IV detection;

[0088] S6. After the detection is completed, the rotating unit 1 carries the battery cell 200 and rotates from the detection station to the unloading station. The unloading handling mechanism 8 sucks and transports the battery cell 200 from the adsorption fixture 13 to the unloading conveyor line 7 to realize unloading.

[0089] In step S5, it also includes the detection of the appearance defects of the battery cell: the light source 34 is lit, the third camera 37 obtains the image information of the battery cell 200, and cooperates with the defect detection software of the upper computer to realize the detection of the appearance defects of the battery cell. The detection of the appearance defects of the battery cell can be before the IV detection or after the IV detection.

[0090] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A high-precision battery IV detection device, characterized by: include: A rotating unit, around which a loading station, a first photographing station, a testing station and a unloading station are sequentially arranged; The rotating unit includes a rotating support plate that performs a rotating motion and an adsorption fixture that is arranged at equal angles on the rotating support plate, the adsorption fixture includes an adsorption support rod for adsorbing and supporting the battery sheet, and a plurality of suction nozzles are arranged on the adsorption support rod; A plurality of first cameras are arranged at a first photographing station to photograph the battery sheet to obtain first position information; The detection unit is arranged at the detection station, and includes a second driving member, a first supporting plate driven by the second driving member to move up and down, an XYR fine-tuning module arranged on the first supporting plate, a test module arranged at the movable end of the XYR fine-tuning module, and a flexible pressing module and a light source located above the test module; the test module includes a mounting support fixed at the movable end of the XYR fine-tuning module, a supporting base plate fixed on the mounting support, and a test circuit board fixed on the supporting base plate; the flexible pressing module includes a third driving member, a second supporting plate driven by the third driving member to move up and down, a mounting plate fixed on the second supporting plate and opposite to the test module up and down, and a plurality of pressing pins arranged on the mounting plate; The XYR fine-tuning module adjusts the position of the test module according to the first position information; the pressing needles are distributed in an array according to the positions of the gate line electrodes on the battery cell; The feeding conveyor line is connected to the feeding station, and the tail section of the feeding conveyor line is correspondingly provided with a second photo taking station; A second camera is provided at a second photographing station to photograph the battery cells on the feeding conveyor line to obtain second position information; The deflection correction loading and transporting mechanism sucks the battery cell from the second photographing station according to the second position information, then transports it to the loading station, and places it on the adsorption fixture according to the set posture position; the deflection correction loading and transporting mechanism includes a UVW alignment platform, a third support plate arranged at the movable end of the UVW alignment platform, a fourth driving member fixed on the third support plate, a fourth support plate driven by the fourth driving member to move horizontally between the second photographing station and the loading station, a fifth driving member fixed on the fourth support plate, a fifth support plate driven by the fifth driving member to move up and down, and a plurality of suction cup assemblies arranged on the fifth support plate; Unloading conveyor line, docking unloading station setting; The unloading and transporting mechanism transports the battery cells from the unloading station to the unloading conveyor line.

2. The high-precision battery cell IV detection device according to claim 1, characterized in that: The rotating unit includes a first driving member that drives the rotating support plate to perform a rotating motion; A hollowed-out working area is provided on the rotating support plate corresponding to the position of the adsorption fixture, and the adsorption support rod is located in the working area.

3. The high-precision battery cell IV detection device according to claim 2, characterized in that: The rotating unit also includes a pneumatic slip ring rotatably connected to the rotating support plate; the adsorption fixture includes a support frame, the support frame surrounds the working area, and an air path is arranged inside the support frame and the adsorption support rod, one end of the air path is connected to the suction nozzle and the other end is connected to the air nozzle on the pneumatic slip ring.

4. The high-precision battery cell IV detection device according to claim 1, characterized in that: The support base plate and the test circuit board are provided with avoidance grooves for avoiding the adsorption support rod; during IV detection, the support base plate rises to a set height, at which the adsorption support rod is located in the avoidance groove, and at the same time, the suction nozzle adsorbs the battery cell at a set height position above the test circuit board.

5. The high-precision battery cell IV detection device according to claim 1, characterized in that: The detection unit also includes a third camera for detecting appearance defects of the battery cell, and the third camera is located above the flexible clamping module; a hollow gap is provided on the second support plate, and the mounting plate is arranged corresponding to the position of the hollow gap, and the mounting plate is a light-transmitting material plate structure.

6. A high-precision battery IV detection method, characterized in that: The high-precision battery cell IV detection device according to claim 1 is implemented, comprising the following steps: S1, the feeding conveyor line conveys the battery cells to the second photographing station; S2, the second camera takes a picture of the battery cell to obtain second position information; S3, the deflection correction loading and transporting mechanism sucks the battery cell from the second photographing station and transports it to the loading station, and places the battery cell on the adsorption fixture according to the set position and posture; S4, the rotating unit carries the battery cell and rotates from the loading station to the first photographing station, and the first camera takes a photo of the battery cell on the adsorption fixture to obtain the first position information; S5, the rotating unit carries the battery cell and rotates from the first photographing station to the inspection station, the XYR fine-tuning module adjusts the test module to the set position state according to the first position information, and then the test module rises to the set height. At this time, the battery cell is adsorbed and sits on the suction nozzle, and is located at the set height position above the test module. The pressing needle descends, pressing the battery cell downward, and compressing the suction nozzle at the same time, so that the battery cell is attached to the surface of the test circuit board on the test module, so that the grid line electrode on the lower surface of the battery cell is in contact with the corresponding electrical connection point on the test circuit board to achieve electrical conduction, and perform IV detection; S6. After the inspection is completed, the rotating unit carries the battery cell and rotates from the inspection station to the unloading station. The unloading and transporting mechanism sucks and transports the battery cell from the adsorption fixture to the unloading conveyor line to realize unloading.

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