Photoelectric conversion rate detection device, detection machine and detection method for double half cells

Abstract

The invention relates to a detection device, a detection machine and a detection method for the photoelectric conversion rate of a double-half-piece battery, the detection device comprises a rotary adsorption unit, a feeding lifting conveying device, a camera positioning unit, a probe detection unit and a discharging lifting conveying mechanism, and the probe detection unit comprises a lifting module, a deviation rectifying mechanism and a probe plate. And a light source is arranged above the probe plate. The detection machine further comprises a feeding conveying unit and a discharging conveying unit. The detection method comprises the steps of feeding, photographing and positioning, position adjustment, IV detection and discharging. The detection precision of the detection device can reach + / -0.015 m; and after the deviation correction of the probe plate is completed, the battery piece is rotated in place, and the lamination test is directly performed, so that the detection rhythm is fast, the detection requirements of the high-line-density battery piece with the lines concentrated on a single surface can be met, and the photoelectric conversion rate detection result can be accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical variable measurement, and in particular to a double half-cell battery photoelectric conversion rate detection device, a detection machine and a detection method. Background Art

[0002] Photoelectric conversion rate detection refers to the detection of the conversion efficiency of solar cells. It is necessary to detect the current-voltage output of solar cells under the premise of fixed solar cell area and fixed light intensity for analysis. Its purpose is to help solar cells to classify performance intervals. Only when the performance of solar cells is close can the photovoltaic module with the best conversion efficiency be obtained.

[0003] Half-cell batteries are manufactured as a large panel and then need to be cut into two separate solar cells. When testing, testing one by one is inefficient, and testing two solar cells at the same time is more efficient.

[0004] In order to increase the light-receiving area on the front side of the solar cell, some solar cells will set the conductive points of the positive and negative electrodes on the back side. Then, when testing the photoelectric conversion rate, only the front side needs to be exposed to light and the back side can be tested. However, new difficulties will arise in this test, because the conductive points are set on the same side, which means that the line density is higher within the same range, resulting in a narrower line width and greater difficulty in aligning the probes used for testing. For the simultaneous testing of double-cell half-cell batteries, the relative position of the two half-cell batteries is uncertain, which makes the positioning accuracy more difficult.

[0005] Chinese patent CN 218841009U discloses a double half-cell cell efficiency detection device, where a rotating platform is used to transport two cells to the detection station on one side of the original conveyor line for testing. The rotating platform has four stations. In order to keep the length direction of the two cells unchanged before and after testing, the loading station and the unloading station are in the 180° direction, which results in the waste of the station opposite the detection station; more importantly, the cell needs to be adsorbed from above, and translated to the rotating platform through the handling assembly, and the rotating platform then brings the cell to the detection station. There is no precise positioning in the middle, which not only has a slow beat, but also has low positioning accuracy, which is prone to misjudgment.

[0006] Therefore, it is necessary to improve the detection equipment to solve the above problems. Summary of the invention

[0007] A main purpose of the present invention is to provide a double half-cell battery photoelectric conversion rate detection device, which can locate the positions of two half-cell batteries before probe detection, and then use the probe to adapt to the posture of the half-cell battery, so as to accurately obtain the photoelectric conversion rate detection result.

[0008] The present invention achieves the above-mentioned purpose through the following technical solutions: A double half-cell battery photoelectric conversion rate detection device, comprising a rotary adsorption unit, a loading lifting and conveying device located below and surrounding the rotary adsorption unit, a camera positioning unit, a probe detection unit, and a unloading lifting and conveying mechanism;

[0009] The rotary adsorption unit includes a turntable that performs step-rotation motion, a plurality of light-transmitting plates are arranged on the turntable, a plurality of adsorption holes are provided on the lower surface of the light-transmitting plates, and the light-transmitting plates are closely attached to the upper surface of the battery cell when adsorbing the battery cell;

[0010] The probe detection unit includes a lifting module, a correction mechanism driven to lift by the lifting module, and a probe plate driven by the correction mechanism, and a light source is provided above the probe plate;

[0011] The loading lifting and conveying device and the unloading lifting and conveying device both include a lifting mechanism and a conveying module driven to lift by the lifting mechanism.

[0012] Specifically, each light-transmitting plate is provided with two adsorption areas, and the probe detection units are two groups corresponding to the adsorption areas.

[0013] Furthermore, the correction mechanism includes a horizontal adjustment module and an angle adjustment module, the angle adjustment module drives the probe plate to rotate around the vertical axis, the horizontal adjustment module drives the angle adjustment module to translate in a horizontal plane, and the lifting module drives the horizontal adjustment module to lift and lower.

[0014] Furthermore, the camera positioning unit includes two groups of positioning cameras, each group of positioning cameras has four cameras and are distributed in a rectangular shape.

[0015] Another main purpose of the present invention is to provide a double half-cell battery photoelectric conversion rate detection machine, which can automatically feed in and out pairs of half-cell batteries and complete photoelectric conversion rate detection.

[0016] The present invention achieves the above-mentioned purpose through the following technical scheme: a double half-cell battery photoelectric conversion rate detection machine, which also includes a loading conveying unit and a unloading conveying unit, the outlet of the loading conveying unit is connected to the loading lifting conveying device, and the inlet of the unloading conveying unit is connected to the unloading lifting conveying mechanism.

[0017] Specifically, the loading and conveying unit includes a pair of loading belt lines, an interval adjustment transfer mechanism and several pairs of loading transition belt lines. The loading belt line, the loading transition belt line and the loading lifting and conveying device are arranged in sequence along the first horizontal direction. The interval adjustment transfer mechanism includes a translation module, a first pneumatic finger driven by the translation module to move along the first horizontal direction, and two loading suction cups driven by the two ends of the first pneumatic finger to move along the second horizontal direction. The first horizontal direction is the loading and conveying direction. The first horizontal direction is perpendicular to the second horizontal direction. The spacing between the two loading belt lines is greater than the spacing between the two loading transition belt lines.

[0018] Furthermore, a loading sensor for sensing the position of a half-cell battery is provided on the loading suction cup.

[0019] Furthermore, a group of first feeding and correcting mechanisms are provided on both sides of the conveying direction of each feeding belt line, and a group of second feeding and correcting mechanisms are provided on both sides of the feeding and conveying direction of the feeding transition belt line.

[0020] Specifically, the unloading conveying unit includes a pair of unloading transition belt lines, an interval adjustment mechanism, an adsorption rotating mechanism and a pair of unloading belt lines. The unloading lifting and conveying device, the unloading transition belt line and the unloading belt line are arranged in sequence along the first horizontal direction. The interval adjustment mechanism is located above the unloading transition belt line. The interval adjustment mechanism includes a second pneumatic finger and two first unloading suction cups driven by the two ends of the second pneumatic finger to move along the first horizontal direction. The adsorption rotating mechanism is located above the unloading belt line. The adsorption rotating mechanism includes a rotary motor and two second unloading suction cups driven by the rotary motor to rotate 90° around the vertical center axis. The spacing between the two unloading belt lines is greater than the spacing between the two unloading transition belt lines.

[0021] Another main purpose of the present invention is to provide a method for detecting the photoelectric conversion rate of a double half-cell battery, which can quickly and accurately complete the photoelectric conversion rate detection of the double half-cell battery.

[0022] The present invention achieves the above-mentioned purpose through the following technical solution: a detection method using a double half-cell battery photoelectric conversion rate detection device, the steps comprising:

[0023] S1, loading: two half-cell batteries arrive at the bottom of the loading station, and the loading lifting and conveying device lifts the two half-cell batteries. At this time, the light-transmitting plate waiting at the loading station absorbs the half-cell batteries;

[0024] S2, photo positioning: the turntable rotates to make the half-cell battery reach the photo station, and the four corners of the two half-cell batteries are photographed and positioned respectively. The control system of the inspection machine obtains the photographed image and then calculates and obtains the probe adjustment amount information;

[0025] S3, position adjustment: the turntable continues to rotate, so that the half-cell battery reaches the detection station. During the movement of the half-cell battery, the two detection mechanisms adjust the positions of the probes respectively. When the half-cell battery is in place, the probes rise and connect to the conductive points.

[0026] S4, IV test: Under the premise that the light source above the test station provides stable illumination, light is irradiated through the light-transmitting plate to the upper surface of the half-cell battery, so that a voltage is generated in the half-cell battery, and a current is output from the probe, thereby determining the photoelectric conversion rate of each half-cell battery;

[0027] S5, unloading: After the inspection is completed, the turntable rotates again, and the half-cell battery reaches the unloading station and falls on the unloading lifting and conveying device.

[0028] The beneficial effects of the technical solution of the present invention are:

[0029] 1. The battery cell first flows directly to the bottom of the turntable, and then the battery cell is sucked up by a surface suction cup and rotated to the photo station for photography. The probe board at the detection station immediately adjusts its position to correspond to the grid line of the battery cell using the correction mechanism, and the detection accuracy can reach ±0.015m; after the probe board correction is completed, the battery cell is also rotated into place and the pressing test is carried out directly. Not only is the detection rhythm fast, but it can also adapt to the detection needs of high-line density battery cells with lines concentrated on a single side, and accurately obtain the photoelectric conversion rate detection results.

[0030] 2. The loading and conveying unit is used to deliver two half-cell batteries to the loading station, and the unloading and conveying unit is used to remove the two half-cell batteries from the unloading station to realize automatic loading and unloading of the inspection.

[0031] 3. The process can quickly and accurately test the photovoltaic performance of two half-cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional diagram of a double half-cell battery photoelectric conversion rate detection machine according to an embodiment;

[0033] Figure 2 A three-dimensional diagram of a device for detecting the photoelectric conversion rate of a double half-cell battery in an embodiment;

[0034] Figure 3 It is a top view of the rotary adsorption unit;

[0035] Figure 4 is a three-dimensional diagram of a probe detection unit;

[0036] Figure 5 It is a position relationship diagram of the loading conveying unit and the loading lifting conveying device;

[0037] Figure 6It is a position relationship diagram of the material unloading conveying unit and the material unloading lifting and conveying device;

[0038] Figure 7 for Figure 6 A partial enlarged view of position A in the middle.

[0039] The numbers in the figure represent:

[0040] 1-Dual half-cell battery photoelectric conversion rate tester,

[0041] 11-feeding conveying unit, 111-feeding conveying line, 112-interval adjustment transfer mechanism, 1121-translation module, 1122-first pneumatic finger, 1123-feeding suction cup, 1124-feeding sensor, 113-feeding transition belt line, 1124a-first feeding return mechanism, 1124b-second feeding return mechanism,

[0042] 12- double half-cell battery photoelectric conversion rate detection device, 121- rotary adsorption unit, 121a- loading station, 121b- photographing station, 121c- detection station, 121d- unloading station, 1211- turntable, 1212- light-transmitting plate, 122- camera positioning unit, 1221- positioning camera, 123- probe detection unit, 1231- lifting module, 1232- deviation correction mechanism, 12321- horizontal adjustment module, 12322- angle adjustment module, 1233- probe board, 12331- probe, 124a- loading lifting and conveying device, 124b- unloading lifting and conveying device, 1241- lifting mechanism, 1242- conveying module,

[0043] 13- unloading conveying unit, 131- unloading transition belt line, 132- interval adjustment mechanism, 1321- second pneumatic finger, 1322- first unloading suction cup, 133- adsorption rotary mechanism, 12331- rotary motor, 1332- second unloading suction cup, 134- unloading belt line;

[0044] 2-half cell battery. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below with reference to specific embodiments.

[0046] Example:

[0047] like Figure 1 As shown, a double half-cell battery photoelectric conversion rate detection machine 1 includes a loading and conveying unit 11, a double half-cell battery photoelectric conversion rate detection device 12 and a unloading and conveying unit 13.

[0048] The double half-cell battery photoelectric conversion rate detection device 12 is used for detecting the photoelectric conversion rate of the battery cell, and the loading and unloading conveying unit 11 and the unloading and unloading conveying unit 13 realize automatic loading and unloading of the detection.

[0049] like Figure 2 , Figure 3 and Figure 6As shown, the double half-cell battery photoelectric conversion rate detection device 12 includes a rotary adsorption unit 121, a loading lifting and conveying device 124a, a camera positioning unit 122, a probe detection unit 123 and a unloading lifting and conveying device 124b arranged around the rotary adsorption unit. The rotary adsorption unit 121 includes a turntable 1211 that performs step-by-step rotational motion, and a plurality of light-transmitting plates 1212 are arranged on the turntable 1211. The lower surface of the light-transmitting plate 1212 has a plurality of adsorption holes. The light-transmitting plate 1212 is tightly attached to the upper surface of the battery cell when adsorbing the battery cell. Each light-transmitting plate 1212 has two adsorption areas, and the probe detection unit 123 is two groups corresponding to the adsorption areas. The loading lifting and conveying device 124a and the unloading lifting and conveying device 124b both include a lifting mechanism 1241 and a conveying module 1242 driven to lift by the lifting mechanism 1241. When the cell 2 reaches the double half-cell battery photoelectric conversion rate detection device 12, it is necessary to use the rotary adsorption unit 121 to step-by-step switch the workstation. The detection surface of the cell 2 is located on the lower surface, so the light-transmitting plate 1212 needs to adsorb the cell 2 from top to bottom, so that when the probe 12331 detects, the light-transmitting plate 1212 can also resist the pressure of the probe 12331. The light-transmitting plate 1212 must play an adsorption role, but it cannot block the light from irradiating the light-receiving surface of the cell 2, so it must be transparent. Because the cell 2 is manufactured in groups of two, the light-transmitting plate 1212 needs to adsorb two cells 2 at a time and process them synchronously. In this embodiment, four stations are evenly distributed around the rotary adsorption unit 121. The four stations are respectively a loading station 121a, a photographing station 121b, a detection station 121c and a unloading station 121d around the same rotation direction. The outlet of the loading conveying unit 11 is connected to the loading lifting conveying device 124a, and the loading lifting conveying device 124a is located at the lower part of the loading station 121a. The camera positioning unit 122 is located at the lower part of the photographing station 121b. The probe detection unit 123 is located at the lower part of the detection station 121c. The inlet of the unloading conveying unit 13 is connected to the unloading lifting conveying device 124b, and the unloading lifting conveying device 124b is located at the lower part of the unloading station 121d. In actual applications, the number of stations around the rotary adsorption unit 121 can be more than four. The two battery cells 2 are cut from a whole plate in the previous equipment, so when they flow into the loading and conveying unit 11, the two battery cells 2 move side by side along the conveying direction until they are conveyed to the loading station 121a (the conveying module 1242 of the loading and lifting conveying device 124a), and then the lifting mechanism 1241 of the loading and lifting conveying device 124a will lift the two battery cells 2 together and adsorb them by the light-transmitting plate 1212 on the rotary adsorption unit 121. The rotary adsorption unit 121 is used to send the two battery cells 2 to the photographing station 121b for positioning, the detection station 121c for detection, and the unloading station 121d for unloading in sequence. The camera positioning unit 122 shoots the two battery cells 2 at the position of the photographing station 121b from below to obtain the actual position information of the battery cells 2.The relative position uncertainty between the two battery cells 2 is relatively large, so two sets of correction mechanisms 1232 are required to correct the two probe plates 1233 respectively, and each adapts to the position of a battery cell 2. The correction mechanism 1232 can adjust the plane position (X-axis freedom and Y-axis freedom) and vertical rotation angle (R-axis freedom) of the probe plate 1233 according to the actual position information. The lifting module 1231 controls the lifting and lowering (Z-axis freedom) of the probe plate 1233, so that the probe 12331 correctly contacts the conductive points on the lower surface of the two battery cells 2. The light source is provided from the upper part of the detection station 121c, and the upper surface of the battery cell 2 is illuminated with a stable light intensity through the light-transmitting plate 1212, thereby completing the photoelectric conversion rate detection, meeting the detection accuracy requirements of the battery cells 2 with high density on the single-sided circuit. The unloading and conveying unit 13 will move the two battery cells 2 out of the unloading station 121c.

[0050] The battery cell 2 first flows directly to the bottom of the turntable 1211, and then the battery cell 2 is sucked up by a surface suction cup and rotated to the photographing station 121b for photographing. The probe board 1233 of the detection station 121c immediately uses the correction mechanism 1232 to adjust its position to correspond to the grid line of the battery cell 2, and the detection accuracy can reach ±0.015m; after the probe board 1233 completes the correction, the battery cell 2 is also rotated into place and the pressing test is carried out directly. Not only is the detection rhythm fast, but it can also adapt to the detection needs of battery cells 2 with high line density concentrated on a single side, and accurately obtain the photoelectric conversion rate detection result.

[0051] like Figure 2 As shown, the camera positioning unit 122 includes two groups of positioning cameras 1221, each group of positioning cameras 1221 has four cameras and are distributed in a rectangular shape.

[0052] Each group of four positioning cameras 1221 respectively photographs the four corners of the adsorption area. Since the four corners of the adsorption area correspond to the four corners of the battery cell 2 , the deviation between the detected battery cell 2 and the standard position can be known, and then the adjustment amount of the probe 12331 can be determined.

[0053] like Figure 4 As shown, the probe detection unit 123 includes a lifting module 1231, a correction mechanism 1232 driven to lift by the lifting module 1231, and a probe plate 1233 driven by the correction mechanism 1232. A plurality of probes 12331 are provided on the upper surface of the probe plate 1233, and a light source is provided above the probe plate 1233. The correction mechanism 1232 includes a horizontal adjustment module 12321 and an angle adjustment module 12322. The angle adjustment module 12322 drives the probe plate 1233 to rotate around a vertical axis, the horizontal adjustment module 12321 drives the angle adjustment module 12322 to translate in a horizontal plane, and the lifting module 1231 drives the horizontal adjustment module 12321 to lift and lower.

[0054] The probe plate 1234 has four degrees of freedom, namely three-coordinate directions and vertical rotation angle, so that the position and angle of the probe plate 1234 can be adjusted. The distribution position of the probe 12331 on the probe plate 1234 corresponds to the position of the conductive point of the battery cell 2. However, in order to prevent the battery cell 2 from being misjudged due to inaccurate position, the battery cell 2 is accurately contacted with the probe 12331 by adjusting the position of the probe plate 1234, provided that the deviation of the battery cell 2 has been determined by the positioning camera 1221. Because the positions of the two battery cells 2 are independent of each other, the actions of the two detection mechanisms are independent.

[0055] like Figure 5 As shown, the feeding conveying unit 11 includes a pair of feeding belt lines 111, an interval adjustment transfer mechanism 112 and a plurality of pairs of feeding transition belt lines 113. The feeding belt lines 111, the feeding transition belt lines 113 and the feeding lifting and conveying device 124a are arranged in sequence along the first horizontal direction. The interval adjustment transfer mechanism 112 includes a translation module 1121, a first pneumatic finger 1122 driven by the translation module 1121 to move along the first horizontal direction, and two feeding suction cups 1123 driven by the two ends of the first pneumatic finger 1122 to move along the second horizontal direction. The feeding suction cups 1123 are provided with a feeding sensor 1124 for sensing the position of the battery sheet 2. The first horizontal direction is the feeding conveying direction, and the first horizontal direction is perpendicular to the second horizontal direction. A set of first feeding alignment mechanisms 1124a are arranged on both sides of the conveying direction of each feeding belt line 111, and a set of second feeding alignment mechanisms 1124b are arranged on both sides of the feeding conveying direction of the feeding transition belt line 113. The distance between the two feeding belt lines 111 is greater than the distance between the two feeding transition belt lines 113 .

[0056] The loading and conveying unit 11 is used to deliver two battery cells 2 to the loading station 121a. In order to reduce the radius of the turntable 1211, the two battery cells 2 can be slightly closer before entering the loading station 121a. In this process, the interval adjustment transfer mechanism 112 will use two loading sensors 1124 to sense the position of the battery cell 2, and then the two loading suction cups 1123 will absorb the two battery cells 2 respectively, and then be separated by the first pneumatic finger 1122; driven by the translation module 1121, the two battery cells 2 move to the loading transition belt line 113 and then are put down. At this time, the two battery cells 2 are respectively located on the two loading transition belt lines 113. The loading suction cup 1123 uses a Bernoulli suction cup to avoid lifting. In order to ensure the accuracy of each action, the first loading and correcting mechanism 1124a and the second loading and correcting mechanism 1124b are used to clamp the single-piece battery cell 2 from both sides in turn, so as to ensure the correct posture and avoid the problem that the loading suction cup 1123 and the light-transmitting plate 1212 cannot absorb the battery cell 2.

[0057] like Figure 6As shown, the material unloading conveying unit 13 includes a pair of material unloading transition belt lines 131, a spacing adjustment mechanism 132, an adsorption rotation mechanism 133 and a pair of material unloading belt lines 134. The material unloading lifting and conveying device 124b, the material unloading transition belt line 131 and the material unloading belt line 134 are arranged in sequence along the first horizontal direction. The spacing adjustment mechanism 132 is located above the material unloading transition belt line 131. The spacing adjustment mechanism 132 includes a second pneumatic finger 1321 and two first material unloading suction cups 1322 driven by the two ends of the second pneumatic finger 1321 to move along the first horizontal direction. The adsorption rotation mechanism 133 is located above the material unloading belt line 134. The adsorption rotation mechanism 133 includes a rotary motor 12331 and two second material unloading suction cups 1332 driven by the rotary motor 12331 to rotate 90 degrees around the vertical center axis. The spacing between the two material unloading belt lines 134 is greater than the spacing between the two material unloading transition belt lines 131.

[0058] The unloading and conveying unit 13 is used to move the two battery cells 2 out of the unloading station 121d. The spacing adjustment mechanism 132 is used to adjust the spacing between the two battery cells 2 to the state when entering the detection machine, that is, the two first unloading suction cups 1322 suck the two battery cells 2 respectively, and then the second pneumatic finger 1321 makes the two first unloading suction cups 1322 move away from each other. Because the turntable 1211 between the loading station 121a and the unloading station 121d rotates 270° (90° each time, three times), the length and width directions of the battery cells 2 are interchanged. In order to ensure that the two battery cells 2 are still transported side by side, it is necessary to use the adsorption rotating mechanism 133 to adsorb the battery cell 2 and then rotate it 90° around the vertical axis. The specific method is: the unloading transition belt line 131 first transports the two separated battery cells 2 to the unloading belt line 134, at which time each battery cell 2 is straddling the two unloading belt lines 134; then the two second unloading suction cups 1332 respectively absorb the two battery cells 2 when they are in the front and rear positions of the unloading conveying direction, and then the rotary motor 12331 rotates the two battery cells 2 by 90°, and then puts them back on the two unloading belt lines 134, at which time each battery cell 2 is respectively located on one unloading belt line 134, and at this time the two battery cells 2 are sent out of the inspection machine. The first unloading suction cup 1322 and the second unloading suction cup 1332 use Bernoulli suction cups to avoid lifting.

[0059] The working process of the double half-cell battery photoelectric conversion rate detection machine 1 is as follows:

[0060] S1, spacing adjustment: two battery cells 2 initially enter the feeding belt line 111 at a wide distance, and after being corrected by the first feeding correction mechanism 1124a, the spacing adjustment transfer mechanism 112 sucks the two battery cells 2 on the feeding belt line 111 and brings them closer together, and then places them on the feeding transition belt line 113;

[0061] S2, alignment: After the second loading alignment mechanism 1124b further aligns the two battery cells 2, the loading transition belt line 113 will bring the two battery cells 2 to the loading lifting and conveying device 124a;

[0062] S3, loading: two battery cells 2 directly arrive at the bottom of the loading station, and the loading lifting and conveying device 124a lifts the two battery cells 2. At this time, the light-transmitting plate 1212 waiting at the loading station 121a will absorb the battery cells 2;

[0063] S4, photo positioning: the turntable 1211 rotates 90° to make the battery cell 2 reach the photo station 121b. A total of eight positioning cameras 1221 below the photo station 121b take photos and position the four corners of the two battery cells 2 respectively. The control system of the inspection machine obtains the photo images and then calculates and obtains the probe adjustment amount information;

[0064] S5, position adjustment: the turntable 1211 continues to rotate 90°, so that the battery cell 2 reaches the detection station 121c. During the movement of the battery cell 2, the two sets of detection mechanisms will adjust the position of the probe 12331 respectively. When the battery cell 2 is in place, the probe 12331 will rise and connect the conductive point;

[0065] S6, IV detection: Under the premise that the light source above the detection station 121c provides stable illumination, light is irradiated to the upper surface of the battery cell 2 through the light-transmitting plate 1212, so that a voltage is generated in the battery cell 2, and a current is output from the probe 12331, so as to determine the photoelectric conversion rate of each battery cell 2;

[0066] S7, unloading: After the inspection is completed, the turntable 1211 rotates 90 degrees again, and the battery cell 2 reaches the unloading station 121d and falls on the unloading lifting and conveying device 124b. At this time, the two battery cells 2 are arranged side by side in the unloading conveying direction;

[0067] S8, secondary spacing adjustment: the unloading lifting and conveying device 124b transfers the two battery cells 2 to the unloading transition belt line 131, the spacing adjustment mechanism 132 uses two first unloading suction cups 1322 to respectively suck the two battery cells 2, and then the second pneumatic finger 1321 drives the two battery cells 2 to separate a certain distance, and then the two battery cells 2 are put back on the unloading transition belt line 131;

[0068] S9, unloading: the unloading transition belt line 131 transports two battery cells 2 to the unloading belt line 134 and reaches the bottom of the adsorption rotary mechanism 133. The adsorption rotary mechanism 133 relies on two second unloading suction cups 1332 to adsorb the two battery cells 2. Then the rotary motor 12331 rotates the two battery cells 2 around the vertical axis by 90° and then puts them back on the unloading belt line 134. Then the two unloading belt lines 134 each carry a battery cell 2 out of the detection machine, and the rear equipment will separate the panels according to the photoelectric conversion rate detection results.

[0069] The above process can quickly and accurately test the photovoltaic performance of the two solar cells 2 (IV testing for short).

[0070] 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 double half-cell battery photoelectric conversion rate detection device, characterized in that: It includes a rotary adsorption unit, a loading lifting and conveying device located below and surrounding the rotary adsorption unit, a camera positioning unit, a probe detection unit, and a unloading lifting and conveying mechanism; The rotary adsorption unit includes a turntable that performs step-rotation motion, a plurality of light-transmitting plates are arranged on the turntable, a plurality of adsorption holes are provided on the lower surface of the light-transmitting plates, and the light-transmitting plates are closely attached to the upper surface of the battery cell when adsorbing the battery cell; The probe detection unit includes a lifting module, a correction mechanism driven to lift by the lifting module, and a probe plate driven by the correction mechanism, and a light source is provided above the probe plate; The loading lifting and conveying device and the unloading lifting and conveying device both include a lifting mechanism and a conveying module driven to lift by the lifting mechanism.

2. The double half-cell battery photoelectric conversion rate detection device according to claim 1, characterized in that: Two adsorption areas are arranged on each light-transmitting plate, and the probe detection units are two groups corresponding to the adsorption areas.

3. The double half-cell battery photoelectric conversion rate detection device according to claim 2, characterized in that: The correction mechanism includes a horizontal adjustment module and an angle adjustment module. The angle adjustment module drives the probe plate to rotate around a vertical axis. The horizontal adjustment module drives the angle adjustment module to translate in a horizontal plane. The lifting module drives the horizontal adjustment module to lift and lower.

4. The double half-cell battery photoelectric conversion rate detection device according to claim 2, characterized in that: The camera positioning unit includes two groups of positioning cameras, each group of positioning cameras includes four cameras distributed in a rectangular shape.

5. A double half-cell battery photoelectric conversion rate detection machine comprising the double half-cell battery photoelectric conversion rate detection device according to any one of claims 1 to 4, characterized in that: It also includes a loading conveying unit and a unloading conveying unit. The outlet of the loading conveying unit is connected to the loading lifting conveying device, and the inlet of the unloading conveying unit is connected to the unloading lifting conveying mechanism.

6. The double half-cell battery photoelectric conversion rate detection device according to claim 5, characterized in that: The loading and conveying unit includes a pair of loading belt lines, an interval adjustment transfer mechanism and several pairs of loading transition belt lines. The loading belt lines, the loading transition belt lines and the loading lifting and conveying device are arranged in sequence along the first horizontal direction. The interval adjustment transfer mechanism includes a translation module, a first pneumatic finger driven by the translation module to move along the first horizontal direction, and two loading suction cups driven by the two ends of the first pneumatic finger to move along the second horizontal direction. The first horizontal direction is the loading and conveying direction. The first horizontal direction is perpendicular to the second horizontal direction. The spacing between the two loading belt lines is greater than the spacing between the two loading transition belt lines.

7. The double half-cell battery photoelectric conversion rate detection machine according to claim 6, characterized in that: The loading suction cup is provided with a loading sensor for sensing the position of a half-cell battery.

8. The double half-cell battery photoelectric conversion rate detection machine according to claim 6, characterized in that: A set of first feeding and correcting mechanisms are provided on both sides of the conveying direction of each feeding belt line, and a set of second feeding and correcting mechanisms are provided on both sides of the feeding and conveying direction of the feeding transition belt line.

9. The double half-cell battery photoelectric conversion rate detection machine according to claim 5, characterized in that: The unloading conveying unit includes a pair of unloading transition belt lines, an interval adjustment mechanism, an adsorption rotating mechanism and a pair of unloading belt lines. The unloading lifting and conveying device, the unloading transition belt line and the unloading belt line are arranged in sequence along the first horizontal direction. The interval adjustment mechanism is located above the unloading transition belt line. The interval adjustment mechanism includes a second pneumatic finger and two first unloading suction cups driven by the two ends of the second pneumatic finger to move along the first horizontal direction respectively. The adsorption rotating mechanism is located above the unloading belt line. The adsorption rotating mechanism includes a rotary motor and two second unloading suction cups driven by the rotary motor to rotate 90° around the vertical center axis. The spacing between the two unloading belt lines is greater than the spacing between the two unloading transition belt lines.

10. A detection method using the double half-cell battery photoelectric conversion rate detection device according to any one of claims 1 to 4, characterized in that the steps include: S1, loading: two half-cell batteries arrive at the loading station, and the loading lifting and conveying device lifts the two half-cell batteries. At this time, the light-transmitting plate waiting at the loading station absorbs the half-cell batteries; S2, photo positioning: the turntable rotates to make the half-cell battery reach the photo station, and the four corners of the two half-cell batteries are photographed and positioned respectively. The control system of the inspection machine obtains the photographed image and then calculates and obtains the probe adjustment amount information; S3, position adjustment: the turntable continues to rotate, so that the half-cell battery reaches the detection station. During the movement of the half-cell battery, the two detection mechanisms adjust the positions of the probes respectively. When the half-cell battery is in place, the probes rise and connect to the conductive points. S4, IV test: Under the premise that the light source above the test station provides stable illumination, light is irradiated through the light-transmitting plate to the upper surface of the half-cell battery, so that a voltage is generated in the half-cell battery, and a current is output from the probe, thereby determining the photoelectric conversion rate of each half-cell battery; S5, unloading: After the inspection is completed, the turntable rotates again, and the half-cell battery reaches the unloading station and falls on the unloading lifting and conveying device.

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