High-precision battery piece IV detection equipment and detection method

Abstract

The invention discloses high-precision battery piece IV detection equipment and a detection method. The device comprises a rotating unit, a feeding station, a first photographing station, a detection station, a discharging station, a plurality of first cameras arranged at the first photographing station, a detection unit arranged at the detection station, a feeding conveying line in butt joint with the feeding station, and a second photographing station corresponding to the tail section of the feeding conveying line, wherein the feeding station, the first photographing station, the detection station and the discharging station are arranged around the rotating unit; the second camera is arranged at the second photographing station and located below the feeding conveying line, and the deviation rectifying feeding carrying mechanism is used for adjusting the battery pieces from the second photographing station to the set state according to the position information obtained by the second camera and then carrying and placing the battery pieces to the feeding station. The blanking conveying line is arranged in butt joint with the blanking station; and the blanking carrying mechanism is used for carrying the battery pieces from the blanking station to the blanking conveying line. According to the invention, high-precision and high-density grid line conduction test can be realized, and the hidden crack risk of the battery is reduced.

Description

Technical Field

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

[0002] After solar cells are manufactured, they must be graded according to their photoelectric conversion efficiency to maximize their benefits. The industry calls the test of the photoelectric conversion efficiency of solar cells IV testing. In order to improve the production efficiency of solar cells, a large number of solar cell IV automated testing equipment have appeared on the market.

[0003] Patent CN218841009U in the prior art discloses a double half-cell efficiency detection device, which uses a rotating mechanism to realize the position transfer of the cell between the loading station, the testing station and the unloading station, and sets a visual camera at the loading station to cooperate with the adjustment mechanism to realize the precise deviation correction of the cell position. At the testing station, the upper and lower probe rows that are opposite to each other are used to clamp the cell up and down by approaching each other, so as to realize the electrical conduction with the grid lines on the upper and lower surfaces of the cell, thereby realizing IV detection of the cell. However, the detection device has the following disadvantages: (1) There are four workstations around the turntable, but only three of them are actually in use, resulting in a waste of workstations; (2) For a cell structure with connecting grid lines on both sides, there is enough space in the upper and lower surface areas of the cell to arrange the upper probe row and the lower probe row, and there is a large tolerance error to ensure the contact and conduction between the probe and the grid line electrode; however, for a cell with the upper and lower surface grid lines integrated on one of the surfaces, the distribution density of the grid lines on a single surface of the cell doubles. On the one hand, it is impossible to arrange probes with a corresponding density in the cell plane area. On the other hand, the contact accuracy requirement between the probe and the grid line electrode is higher, and the detection device cannot meet the electrical conduction contact requirements with higher accuracy; (3) During testing, the battery cell is clamped in relative positions by the upper and lower probe rows. If the upper and lower contact points are not aligned, the upper and lower force points of the battery cell will be misaligned, and there is a greater risk of hidden cracks. For battery cells with grid lines on only one side, the grid line spacing is very small, the probes are arranged very densely, and the probe diameter is also very small. It is more difficult to accurately align the upper and lower probes, so it is easy to crush the battery cell.

[0004] Therefore, it is necessary to provide a new high-precision battery cell IV detection equipment and detection method to solve the above technical problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-precision battery cell IV detection device, which can realize high-precision and high-density grid line conduction test and reduce the risk of hidden cracks in batteries.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: A high-precision battery cell IV detection device, comprising: 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 comprises a rotating support plate for rotating motion and an adsorption fixture arranged at equal angles on the rotating support plate, the adsorption fixture comprises 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 the first photographing station to photograph the battery sheet to obtain first position information; A detection unit is arranged at the detection station, comprising a test module that moves up and down, an XYR fine-tuning module that adjusts the position of the test module according to the first position information, and a flexible pressing module located above the test module, wherein the flexible pressing module comprises a mounting plate that moves up and down and is opposite to the test module up and down, and a plurality of pressing pins arranged on the mounting plate; A feeding conveyor line is connected to the feeding station, and a second photographing station is correspondingly arranged at the tail section of the feeding conveyor line; A second camera is arranged at the second photographing station to photograph the battery cells on the feeding conveyor line to obtain second position information; A deflection correction and loading and transporting mechanism, which picks up 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; A material unloading conveyor line is connected to the material unloading station; The unloading and transporting mechanism transports the battery cells from the unloading station to the unloading conveying line.

[0007] Further, the rotating unit includes a first driving member for driving 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.

[0008] Furthermore, 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.

[0009] Furthermore, 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-tuning module is arranged on the first support plate, and the test module is arranged at the movable end of the XYR fine-tuning module.

[0010] Furthermore, the flexible pressing module includes a third driving member, a second supporting plate driven by the third driving member to move up and down, and the mounting plate is fixed on the second supporting plate; the pressing pins are distributed in an array corresponding to the positions of the gate line electrodes on the battery cell.

[0011] Furthermore, the test module includes a mounting support fixed to the movable end of the XYR fine-tuning module, a supporting base plate fixed to the mounting support, and a test circuit board fixed to the supporting base plate.

[0012] Furthermore, 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.

[0013] Furthermore, the detection unit also includes a third camera for performing appearance defect detection on the battery cell, and the third camera is located above the flexible clamping module; a hollow notch is provided on the second support plate, and the mounting plate is arranged corresponding to the position of the hollow notch, and the mounting plate is a light-transmitting material plate structure.

[0014] Furthermore, the deviation-correcting and loading and 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.

[0015] Another object of the present invention is to provide a high-precision battery cell IV detection method, which is implemented based on the high-precision battery cell IV detection device as described above, and comprises the following steps: S1, the loading conveyor line conveys the battery cell 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 photographs the battery cell on the adsorption fixture to obtain 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 a set height. At this time, the battery cell is adsorbed and seated on the suction nozzle and is located at a set height position above the test module. The pressing needle descends and presses the battery cell downward, while compressing the suction nozzle to attach the battery cell 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 contacts 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.

[0016] Compared with the prior art, the high-precision battery cell IV detection equipment and detection method of the present invention have the beneficial effects of: being able to achieve high-precision, high-density grid line conduction testing and reducing the risk of hidden cracks in batteries. Specifically: (1) A second camera is set at the end of the feeding conveyor line to visually locate the battery cells at the end of the feeding conveyor line, and cooperate with the correction feeding and handling mechanism to achieve high-precision feeding of the battery cells; cooperate with the first camera located at the second-order station in the rotating unit to visually locate the battery cells in the adsorption fixture on the rotating unit, and cooperate with the XYR fine-tuning module located at the third-order inspection station in the rotating unit to perform high-precision automatic correction of the test module to ensure that after the battery cells are moved to the inspection station, they can achieve higher-precision docking with the test module, thereby meeting higher-precision docking and conduction requirements; (2) The loading station, the first photo taking station, the inspection station and the unloading station are arranged in sequence around the rotating unit. All four stations are effectively utilized, and there is no waste of stations. (3) At the inspection station, a suction nozzle on the suction support rod of the suction fixture is used to form an elastic support platform, and the battery cell is located on the elastic support platform. When the battery cell is moved into place, the test module is raised to a set height. At the set height, the battery cell is located above the test circuit board, and then the pressure needle row in the upper flexible pressing module is used to press the battery cell downward, thereby compressing the suction nozzle and flexibly pressing the battery cell on the test circuit board to ensure effective and reliable contact between the gate electrode on the battery cell and the electrical connection point 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 hidden crack problem caused by hard contact on the battery cell is effectively solved; (4) The test module uses a test circuit board as an electrical conductive component to achieve electrical connection with the battery cell grid electrode. Compared with the electrical conduction achieved by the probe, it can achieve a higher density of electrical connection points and meet the high-density electrical conduction requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a top view of the structure of an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a rotating unit, a detection unit and a first camera according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a rotating unit and a first camera in an embodiment of the present invention; Figure 4 is a schematic diagram of the side structure of a detection unit in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a flexible pressing module in an embodiment of the present invention; Figure 6 It is a partial structural schematic diagram of a detection unit in an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the test module, the adsorption support rod and the pressure needle in the embodiment of the present invention; Figure 8 It is a structural schematic diagram of a feeding conveyor line, a deviation-correcting feeding and handling mechanism, and a second camera in an embodiment of the present invention; Fig. 9 It is a structural schematic diagram of the direction adjustment mechanism in an embodiment of the present invention; The numbers in the figure represent: 100- high-precision battery IV testing equipment; 200- battery cells; 1-rotation unit, 11-first driving member, 12-rotation support plate, 13-adsorption fixture, 131-support frame, 1311-working area, 132-adsorption support rod, 1321-suction nozzle, 14-pneumatic slip ring; 2-first camera, 21-lighting board, 22-fine-tuning module; 3-detection unit, 31-second driving member, 32-first support plate, 33-test module, 331-mounting support, 332-support base plate, 333-test circuit board, 3331-avoidance groove, 34-light source, 35-XYR fine-tuning module, 36-flexible pressing module, 361-third driving member, 362-second support plate, 3621-hollow gap, 363-mounting plate, 364-pressing needle, 37-third camera; 4-feeding conveyor line; 5-second camera; 6-deviation correction feeding and 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; 7- material unloading conveying line; 8- material unloading transporting mechanism; 9- direction adjustment mechanism, 91- sixth driving member, 92- sixth supporting plate, 93- adsorption component. DETAILED DESCRIPTION

[0018] Embodiment 1: Please refer to Figure 1-Figure 9 The present embodiment is a high-precision battery cell IV detection device 100, which includes a rotating unit 1, a loading station arranged around the rotating unit 1, a first photographing station, a detection station and a unloading station, a plurality of 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 correction loading and conveying mechanism 6 that adjusts the battery cell 200 from the second photographing station to a set state according to the position information obtained by the second camera 5, and then transports and places it at the loading station, a unloading conveyor line 7 connected to the unloading station, and an unloading conveying mechanism 8 that transports the battery cell 200 from the unloading station to the unloading conveyor line 7.

[0019] The rotating unit 1 is mainly used to transfer the battery cell 200 between the loading station, the first photographing station, the inspection station and the unloading station. The rotating unit 1 includes a first driving member 11, a rotating support plate 12 that is rotated at an equal angle by the first driving member 11, and an adsorption fixture 13 that is arranged at an equal angle on the rotating support plate 12 and is used to adsorb the battery cell.

[0020] The adsorption fixture 13 includes a support frame 131 fixed on one side of the rotating support plate 12 and cantilevered out of the rotating support plate 12, and a plurality of adsorption support rods 132 arranged on the support frame 131 for adsorbing and supporting the battery cell 200. The support frame 131 is a rectangular frame structure and surrounds a hollowed-out working area 1311, the adsorption support rods 132 are arranged in the working area 1311, and a plurality of suction nozzles 1321 are arranged on the adsorption support rods 132 at intervals along the physical extension direction thereof.

[0021] In this embodiment, two groups of adsorption support rods 132 are provided, which respectively adsorb and support two battery halves. When the two battery halves are placed on the adsorption support rods 132, the whole is located in the working area 1311, and there is a certain distance between two adjacent battery halves. One end of the adsorption support rod 132 is fixed to the support frame 131 body and the other end is cantilevered toward the working area 1311.

[0022] In other embodiments, the adsorption support rods 132 may also be arranged corresponding to only one battery sheet, and arranged around the contour of the battery sheet, for example, two groups of supporting edges on opposite sides of the battery sheet may be arranged, or four groups of supporting edges around the battery sheet may be arranged to flatten the battery, or multiple groups of supporting the bottom area of ​​the battery sheet may be arranged.

[0023] Since the rotating unit 1 will rotate in one direction at a high frequency and ventilation is required in the adsorption support rod 132, in order to facilitate the connection of the air pipe and prevent the air pipe from being entangled, the rotating unit 1 also includes a pneumatic slip ring 14 rotatably connected to the rotating support plate 12, and an air path (not shown in the figure) is arranged inside the support frame 131 and the adsorption support rod 132, one end of the air path is connected to the suction nozzle 1321 and the other end is connected to the air nozzle on the pneumatic slip ring 14.

[0024] In this embodiment, eight groups of first cameras 2 are provided, corresponding to the four corner positions of the two battery halves, for accurately obtaining the position information of the battery cell 200 on the adsorption fixture 13, so as 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 provided with a 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 one or more combined adjustments of the X-axis, Y-axis and Z-axis according to requirements.

[0025] In other embodiments, the rotating support plate 12 may also be directly designed as a disc structure, the support frame 131 may be integrated into the disc structure, and a rectangular slot may be opened in the disc structure to form a working area 1311 .

[0026] 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 arranged on the first support plate 32 and used to contact the gate electrode on the battery cell, and a light source 34 arranged above the test module 33 and irradiating the battery cell according to set requirements.

[0027] In order to adapt to the high-density grid line distribution on the battery cell, this embodiment optimizes the structure of the detection unit 3. Specifically, the detection unit 3 also includes an XYR fine-tuning module 35 disposed on the first support plate 32 and accurately fine-tuning the position of the test module 33 according to the battery cell position information obtained by the first camera 2. The test module 33 is disposed at the movable end of the XYR fine-tuning module 35.

[0028] In order to reduce the risk of hidden cracks caused by hard squeezing and clamping of the battery cell, the structure of the detection unit 3 is further optimized in this embodiment. Specifically: 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 supporting plate 362 driven by the third driving member 361 to move up and down, a mounting plate 363 fixed on the second supporting plate 362 and opposite to the test module 33 up and down, and a plurality of pressing pins 364 arranged on the mounting plate 363.

[0029] In this embodiment, the pressing needle 364 is different from the probe used in the prior art to achieve electrical conduction with the gate line electrode. The pressing needle 364 in the flexible pressing module 36 is only used to press down the position close to the gate line electrode or corresponding to the gate line electrode on the battery cell 200, and cooperate with the test module 33 and the adsorption fixture 13 to achieve flexible contact between the battery cell 200 and the circuit board on the test module 33, effectively avoiding the occurrence of hidden cracks caused by hard contact between the upper and lower battery cells.

[0030] Secondly, the test module 33 includes a mounting support 331 fixed to the movable end of the XYR fine-tuning module 35, a support base 332 fixed to the mounting support 331, and a test circuit board 333 fixed to the support base 332. The test circuit board 333 is used to process 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 test requirements of single-sided grid electrode batteries.

[0031] Finally, the support base plate 332 and the test circuit board 333 are provided with an avoidance groove 3331 for avoiding the adsorption support rod 132. During the test, the support base plate 332 rises to a set height, at which the adsorption support rod 132 is located in the avoidance groove 3331. At the same time, the suction nozzle 1321 adsorbs the battery cell 200 at a set height position above the test circuit board 333, and the set height is within the height range that 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, and the battery cell 200 is pressed downward by the pressing needle 364. The battery cell 200 is pressed by the pressing needle 364, and then the suction nozzle 1321 is compressed until the battery cell 200 is fitted with the test circuit board 333, thereby achieving flexible and elastic contact between the gate electrode on the lower surface of the battery cell 200 and the test circuit board 333, effectively avoiding the problem of hidden cracks caused by hard contact.

[0032] When the test module 33 is precisely positioned, after the first camera 2 completes taking pictures, the XYR fine-tuning module 35 adjusts the position in advance during the process of the battery cell 200 rotating from the first photographing station to the inspection station. After the battery cell 200 rotates into place, the flexible pressing module 36 can directly perform the pressing test, which has a faster cycle.

[0033] In addition, in this embodiment, the detection unit 3 also includes a third camera 37 for performing appearance defect detection on the battery cell 200, and the third camera 37 is located above the flexible pressing module 36. In this embodiment, a hollow notch 3621 is provided on the second support plate 362, and 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 is convenient for 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 illuminate the battery cell. When the third camera 37 performs appearance defect detection, the mounting plate 363 is located in a high position to avoid blocking the third camera 37 from obtaining the battery cell image. The light source 34 is lit, and the emitted light passes through the light-transmitting mounting plate 363 and illuminates the battery cell. The third camera 37 takes a picture of the battery cell to achieve appearance defect detection.

[0034] The second driving member 31, the first supporting plate 32, the XYR fine-tuning module 35, and the testing module 33 together constitute a testing and correcting module. In this embodiment, two of the testing and correcting modules are arranged at the testing station to adjust the positions of the two testing modules 33 respectively and perform IV testing on the two battery halves at the same time.

[0035] Left and right alignment modules (not shown in the figure) are arranged on both sides of the feeding conveyor line 4 to correct the left and right positions of the battery cells 200; the conveyor belt body of the last conveying section of the feeding conveyor line 4 is cantilevered out by the support rod, and the second camera 5 is arranged below the last conveying section. By cantilevering the conveyor belt body of the last conveying section, there is no obstruction below the conveying section, so that the second camera 5 can take pictures and identify the positions of the battery cells in the conveying section.

[0036] The deviation correcting feeding 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 feeding conveyor line 4 and the feeding 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.

[0037] The UVW alignment platform 61 is used for the suction cup assembly 67 to adsorb the battery cell 200 to adjust the position and posture in the 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 line 4 and transport it to the loading station.

[0038] The correcting loading and transporting mechanism 6 obtains the position and posture of the battery cell 200 on the loading conveyor line 4 according to the second camera 5, then adsorbs the battery cell 200 according to the set adsorption position requirement, and then transports it to the loading station after adjusting it to the set posture and places it on the adsorption fixture 13.

[0039] In this embodiment, the first position correction adjustment of the battery cell 200 is achieved through the cooperation of the second camera 5 with the correction loading and handling mechanism 6, and then the first camera 2 cooperates with the XYR fine-tuning module 35 in the detection unit 3 to perform position correction adjustment on the test module 33 to match the position of the battery cell at the detection station. Through the positioning of the visual camera twice and the corresponding position correction adjustment, the accuracy of the final test module 33 and the surface grid line of the battery cell 200 to achieve electrical conduction is greatly improved, meeting the electrical conduction contact requirements with higher precision requirements. In addition, compared with directly adjusting the position of the test module 33 after visual positioning of the battery cell on the rotating unit 1, the correction adjustment efficiency is higher under the premise of meeting the same accuracy requirements, thereby improving the overall detection efficiency of the equipment.

[0040] Since the battery cell 200 is transported from the unloading station and the direction of the battery cell on the loading conveyor line 4 is 90 degrees different, in order to restore the direction of the battery cell 200 on the conveyor line, a direction adjustment mechanism 9 is also provided next to the unloading conveyor line 7 to adjust the battery cell 200 to the direction consistent with the incoming direction. 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 component 93 fixed on the sixth support plate 92. In this embodiment, the adsorption component 93 adopts a Bernoulli suction cup, and adopts a non-contact adsorption method with the battery cell 200. During adsorption, the battery cell 200 is slightly lifted upward (for example, 1-2 mm) and 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 achieve the direction adjustment restoration of the battery cell 200. In this embodiment, two groups of adsorption components 93 are provided on the sixth support plate 92 to complete the direction adjustment of two battery halves at the same time.

[0041] In other embodiments, the direction adjustment mechanism 9 may also be configured with a separate lifting drive function to drive the sixth support plate 92 to move up and down to achieve the absorption and placement of the battery cell 200 .

[0042] This embodiment also provides a high-precision battery cell IV detection method, which includes the following steps: S1, the feeding conveyor line 4 conveys the battery cell 200 to the second photographing station; wherein the battery cell 200 can be a whole battery cell or two half battery cells; this embodiment is not limited; S2, taking a picture of the battery cell 200 by using the second camera 5 to obtain second position information; S3, the deflection-correcting loading and transporting mechanism 6 adjusts the position of the suction cup assembly 67 according to the second position information, absorbs 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 the deflection-correcting loading and transporting mechanism 6 absorbs the battery cell 200 through the suction cup assembly 67, and 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; S4, the rotating unit 1 carries the battery cell 200 and rotates from the loading station to the first photographing station, and the first camera 2 takes a photo of the battery cell 200 on the adsorption fixture 13 to obtain first position information; S5, the rotating unit 1 carries the battery cell 200 and rotates from the first photographing station to the testing station. During this process, the XYR fine-tuning 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 pressing needle 364 in the flexible pressing module 36 descends, pressing the battery cell 200 downward, and compressing the suction nozzle 1321 at the same time, so that the battery cell 200 is attached to the surface of the test circuit board 333, so that the grid line electrode on the lower surface of the battery cell 200 is in contact with the corresponding electrical connection point on the test circuit board 333 to achieve electrical conduction, and perform IV detection; S6. After the inspection is completed, the rotating unit 1 carries the battery cell 200 and rotates from the inspection station to the unloading station. The unloading and transporting mechanism 8 sucks and transports the battery cell 200 from the adsorption fixture 13 to the unloading conveyor line 7 to realize unloading.

[0043] In step S5, the appearance defect detection of the cell is also included: the light source 34 is turned on, the third camera 37 obtains the image information of the cell 200, and cooperates with the defect detection software of the host computer to realize the appearance defect detection of the cell. The appearance defect detection of the cell can be performed before or after the IV detection.

[0044] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which 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 detection station and a unloading station are sequentially arranged; the rotating unit comprises a rotating support plate for rotating motion and an adsorption fixture arranged at equal angles on the rotating support plate, the adsorption fixture comprises 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 the first photographing station to photograph the battery sheet to obtain first position information; A detection unit is arranged at the detection station, comprising a test module that moves up and down, an XYR fine-tuning module that adjusts the position of the test module according to the first position information, and a flexible pressing module located above the test module, wherein the flexible pressing module comprises a mounting plate that moves up and down and is opposite to the test module up and down, and a plurality of pressing pins arranged on the mounting plate; A feeding conveyor line is connected to the feeding station, and a second photographing station is correspondingly arranged at the tail section of the feeding conveyor line; A second camera is arranged at the second photographing station to photograph the battery cells on the feeding conveyor line to obtain second position information; A deflection correction and loading and transporting mechanism, which picks up 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; A material unloading conveyor line is connected to the material unloading station; The unloading and transporting mechanism transports the battery cells from the unloading station to the unloading conveying 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 detection unit includes a second driving member, a first supporting plate driven by the second driving member to move up and down, and a light source arranged above the test module, the XYR fine-tuning module is arranged on the first supporting plate, and the test module is arranged at the movable end of the XYR fine-tuning module.

5. The high-precision battery cell IV detection device according to claim 1, characterized in that: The flexible pressing module includes a third driving member, a second supporting plate driven by the third driving member to move up and down, and the mounting plate is fixed on the second supporting plate; the pressing pins are distributed in an array corresponding to the positions of the gate line electrodes on the battery cell.

6. The high-precision battery cell IV detection device according to claim 1, characterized in that: The test module comprises a mounting support fixed to the movable end of the XYR fine-tuning module, a supporting base plate fixed to the mounting support, and a test circuit board fixed to the supporting base plate.

7. The high-precision battery cell IV detection device according to claim 6, 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.

8. The high-precision battery cell IV detection device according to claim 5, 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.

9. The high-precision battery cell IV detection device according to claim 1, characterized in that: The deviation correcting and loading and 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.

10. A high-precision battery cell 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 loading conveyor line conveys the battery cell 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 photographs the battery cell on the adsorption fixture to obtain 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 a set height. At this time, the battery cell is adsorbed and seated on the suction nozzle and is located at a set height position above the test module. The pressing needle descends and presses the battery cell downward, while compressing the suction nozzle to attach the battery cell 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 contacts 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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