A solar cell IV detection device

Abstract

The application discloses a solar cell IV detection device, which comprises a frame cover, a conveying belt body and a detection mechanism. The frame cover is provided with an inlet and an outlet on both sides, and the conveying belt body is arranged in the frame cover to realize automatic conveying of the solar cell. The detection mechanism comprises a worm and a worm gear driven by a first motor, a pressing structure and an illumination detection structure. The pressing structure drives the illumination detection structure to vertically move through a fan gear connecting rod mechanism to form a closed detection space. The illumination detection structure is internally provided with an illumination unit, a pressure measurement assembly and two groups of pressure position assemblies. The pressure measurement assembly drives a multi-link posture probe through a motor and a screw nut mechanism to ensure reliable contact with the electrode of the solar cell. The pressure position assembly drives a pressing frame with a buffer spring through a differential gear and rack mechanism to realize self-adaptive pressing. The application realizes efficient and automatic detection and good sealing, guarantees the test precision, and effectively prevents the solar cell from being damaged.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a solar cell IV testing device. Background Technology

[0002] After production, solar cells need to be tested for their electrical performance. The IV characteristic test of solar cells is a key quality inspection link in the production process, and its accuracy directly affects the judgment of product performance. At present, automated IV testing technology has been widely used to improve testing efficiency and reduce manual labor intensity.

[0003] Currently, Chinese patent application number CN201621028262.X discloses a solar cell IV inspection system. The system includes a lighting lamp, a working platform, and an inspection terminal. The lighting lamp is set above the working platform. The inspection terminal includes a control unit. An inspection seat is set on the working platform. The inspection seat is equipped with a suction mechanism for picking up solar cells. An inspection pressure plate is set above the inspection seat. Both ends of the inspection pressure plate are mounted on the working platform through a lifting mechanism. Inspection feet are set on the lower edge of the inspection pressure plate and are connected to the control unit.

[0004] However, existing technologies use a pick-and-place method to transport solar cells, which carries the risk of microcracks in thin and brittle cells due to stress concentration during the picking and placing process. Secondly, the test plate is usually rigidly pressed down, and if the solar cell is warped or there is a slight deviation in its placement posture, it can easily lead to poor contact between the test feet and the solar cell electrodes or uneven force, affecting the stability and reliability of the test data. In addition, the entire testing process is carried out in an open or semi-open space, which makes it difficult to isolate the interference of external ambient light, and can easily introduce errors into the IV test results that require simulating standard lighting conditions. Summary of the Invention

[0005] The purpose of this invention is to provide an IV detection device for solar cells to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a solar cell IV testing device, comprising a frame, an inlet, an outlet, a conveyor belt body, and a testing mechanism. The frame has an inlet and an outlet on its left and right sides, respectively. A conveyor belt body for transporting solar cells is installed on the lower middle side inside the frame. A testing mechanism for IV testing of the solar cells is connected to the upper middle side inside the frame. The testing mechanism includes a support fixed to the rear of the frame, a top cover fixedly connected to the top of the support, a first motor fixed to the top side inside the top cover, and a motor connected to... The first motor has a worm gear at the bottom output shaft, a worm wheel meshing with the right side of the worm gear, a pressing structure connected to the middle rear of the worm wheel, an illumination detection structure fixed to the bottom end of the pressing structure, and two guide rods fixed to the left and right sides of the top of the illumination detection structure. The worm gear rotates through the middle of the bottom of the top cover, and the bottom end of the worm gear is rotatably connected to the support. The middle part of the worm wheel rotates through the right side inside the support. The upper part of the pressing structure is rotatably set inside the support. The bottom of the left and right sides of the support is provided with protrusions, and the two guide rods slide through the two protrusions respectively.

[0007] Preferably, when the lighting detection structure is located at the bottom, its bottom is in contact with the conveyor belt body to prevent external light sources from contacting the solar cells.

[0008] Preferably, the pressing structure includes a first sector gear short rod that rotates coaxially with the worm gear, a second sector gear short rod meshing with the left side of the first sector gear short rod, a first sector gear long rod rotatably connected to the rear side of the right end of the first sector gear short rod, a second sector gear long rod rotatably connected to the rear side of the left end of the second sector gear short rod, and a shifting seat rotatably connected to the bottom of the first sector gear long rod and the second sector gear long rod. The rear sides of the bottom of both the first sector gear short rod and the second sector gear short rod are rotatably connected to the support. The bottoms of the first sector gear long rod and the second sector gear long rod mesh with each other. The bottom of the shifting seat is fixed to the lighting detection structure.

[0009] Preferably, the included angle formed by the second sector gear short rod and the second sector gear long rod is the same as the included angle formed by the first sector gear short rod and the first sector gear long rod.

[0010] Preferably, the illumination detection structure includes a cover fixed to the top center side and the lower pressing structure. An illumination unit is locked and fixed inside the upper center side of the cover, and a pressure testing component is provided inside the lower center side of the cover. A first pressure positioning component and a second pressure positioning component with the same structure and size are respectively provided on the left and right sides of the pressure testing component. The first pressure positioning component and the second pressure positioning component are respectively fastened to the left and right sides inside the cover, and the first pressure positioning component and the second pressure positioning component are located at the same horizontal height.

[0011] Preferably, the pressure testing assembly includes columns fixed to the cover on both the upper and lower sides. A support plate is slidably wrapped around the outer surface of the column. An internally threaded block is embedded in the support plate near the column. A screw is threadedly connected inside the internally threaded block. The top end of the screw is connected to the bottom output shaft of the second motor. A protective cover is provided on the outer surface of the second motor, and the rear side of the protective cover is fixed to the cover. The top side of the screw rotates through the bottom of the protective cover. A probe component is provided through the middle side of the support plate.

[0012] Preferably, the column, internal threaded block, screw, second motor and protective cover are each provided in two sets, and the two sets are arranged symmetrically in the middle of the support plate.

[0013] Preferably, the probe component includes a rectangular cover fastened to the middle side of the top of the support plate. A third motor and a fourth motor are fastened to the left and right sides of the inside of the rectangular cover, respectively. The bottom output shaft of the third motor is connected to a first swing arm, and the other end of the first swing arm is rotatably connected to a first support rod. The bottom output shaft of the fourth motor is connected to a second swing arm, and the other end of the second swing arm is rotatably connected to a second support rod. The end of the second support rod away from the second swing arm is rotatably connected to the top of the first support rod. A vertical rod is provided through the connection between the second support rod and the first support rod. The probe is locked and fixed to the bottom side of the vertical rod.

[0014] Preferably, the first pressing assembly includes a carrier fixed to the cover on both the front and rear sides. An electric push rod is locked and fixed inside the top side of the carrier. A gear plate is rotatably connected to the bottom output shaft of the electric push rod. A first rack and a second rack are respectively meshed and driven on the front and rear sides of the gear plate. The first rack and the second rack slide longitudinally on the front and rear sides inside the carrier. A first pressing frame is fixedly connected to the bottom of the first rack, and a second pressing frame is fixedly connected to the bottom of the second rack. The first pressing frame and the second pressing frame have the same structure and size.

[0015] Preferably, a columnar groove is provided on the inner side of the bottom of the second pressure frame, a spring is connected to the top side inside the columnar groove, and a protruding rod is connected to the bottom end of the spring. The protruding rod slides through the bottom side inside the columnar groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention achieves automatic conveying and positioning of battery cells through the conveyor belt body. Combined with the integrated design of the testing mechanism, it realizes continuous automated operation and significantly improves testing efficiency. At the same time, the frame and the pressurizable illumination detection structure form a closed space during testing, effectively isolating external light interference and providing a stable optical environment for IV testing, thus ensuring the accuracy of test results.

[0018] This invention achieves stable and precise vertical movement of the illumination detection structure through a downward pressing structure composed of a worm gear and a sector gear linkage mechanism. Then, through a screw and internal thread block mechanism driven by a second motor and a precision probe multi-link mechanism, the probe can be finely adjusted in height and horizontal direction, ultimately enabling the probe to accurately and reliably contact the battery cell electrode, thus ensuring the quality of electrical signal acquisition.

[0019] This invention employs a first pressing component and a second pressing component with differential gear drive characteristics, enabling the first pressing frame and the second pressing frame to press the solar cell at different height points successively. Combined with a spring-loaded convex rod, it can adapt to the unevenness of the solar cell surface, achieve stable pressing and clamping, prevent movement during testing, and provide buffer protection, effectively avoiding the problem of microcracks or damage to the solar cell caused by excessive pressing force. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the detection mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the downward pressing structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the illumination detection structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the pressure testing component of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the first pressing component of the present invention.

[0026] In the diagram: Frame cover-1, Inlet-2, Outlet-3, Conveyor belt body-4, Detection mechanism-5, Support-51, Top cover-52, First motor-53, Worm gear-54, Worm wheel-55, Pressing structure-56, Illumination and detection structure-57, Guide rod-58, Lug-511, First sector gear short rod-561, Second sector gear short rod-562, First sector gear long rod-563, Second sector gear long rod-564, Shifting seat-565, Cover seat-571, Illumination unit-572, Pressure testing assembly-573, First pressing assembly-574, Second pressing assembly-575, Column-5731, Support plate-5732, Internal thread Block-5733, Screw-5734, Second Motor-5735, Protective Cover-5736, Probe Component-5737, Rectangular Cover-57371, Third Motor-57372, Fourth Motor-57373, First Swing Rod-57374, First Support Rod-57375, Second Swing Rod-57376, Second Support Rod-57377, Vertical Rod-57378, Probe-57379, Carrier-5741, Electric Push Rod-5742, Gear Plate-5743, First Rack-5744, Second Rack-5745, First Pressure Frame-5746, Second Pressure Frame-5747, Spring-57471, Protruding Rod-57472. Detailed Implementation

[0027] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0028] Please see Figure 1 This invention provides a solar cell IV testing device, including a frame cover 1, an inlet 2, an outlet 3, a conveyor belt body 4, and a testing mechanism 5. The frame cover 1 has an inlet 2 and an outlet 3 on its left and right sides, respectively. The conveyor belt body 4 for transporting solar cells is installed in the lower middle part of the frame cover 1, realizing automatic transport of solar cells and improving testing efficiency. The testing mechanism 5 for IV testing of solar cells is connected in the upper middle part of the frame cover 1, integrating testing functions, realizing automated operation, and forming a closed testing environment during testing to avoid interference from external light.

[0029] Please see Figure 1 and Figure 2This invention provides a solar cell IV detection device. The detection mechanism 5 includes a support 51 that is fastened to the rear side of the frame 1, a top cover 52 that is fixedly connected to the top of the support 51, a first motor 53 that is fastened to the top side inside the top cover 52, a worm gear 54 that is connected to the bottom output shaft of the first motor 53, a worm wheel 55 that meshes with and drives the worm gear 54 on the right side, a pressing structure 56 that is connected to the middle rear side of the worm wheel 55, an illumination detection structure 57 that is fixed to the bottom end of the pressing structure 56, and two guide rods 58 that are respectively fixed to the left and right sides of the top of the illumination detection structure 57. The first motor 53 is used as a power source. The pressing structure 56 drives the illumination detection structure 57 to move up and down through the cooperation of the worm gear 54 and the worm wheel 55. The worm gear 54 rotates through the middle bottom side of the top cover 52, and the bottom end of the worm gear 54 is rotatably connected to the support 51 to enhance the transmission stability.

[0030] The worm gear 55 rotates through the middle of the support 51 on the right side. The upper part of the pressing structure 56 is rotatably set inside the support 51 to provide reliable rotational support. The bottom of both sides of the support 51 is provided with a protrusion 511, and two guide rods 58 slide through the two protrusions 511 respectively to restrict the illumination detection structure 57 to move only up and down, thereby improving positioning accuracy. When the illumination detection structure 57 is at the bottom, its bottom is in contact with the conveyor belt body 4 to prevent external light sources from contacting the solar cells and avoid external light interference with the IV test results.

[0031] Please see Figure 2 and Figure 3 This invention provides a solar cell IV testing device. The pressing structure 56 includes a first sector gear short rod 561 that rotates coaxially with a worm gear 55 to receive power from the worm gear 55 and initiate the pressing process. It also includes a second sector gear short rod 562 that meshes with the left side of the first sector gear short rod 561 and moves synchronously in the opposite direction; a first sector gear long rod 563 that is rotatably connected to the rear right end of the first sector gear short rod 561; a second sector gear long rod 564 that is rotatably connected to the rear left end of the second sector gear short rod 562; and a first sector gear long rod 563 that is rotatably connected to the first sector gear short rod 561. The shifting seat 565 at the bottom of the wheel rod 563 and the second sector gear rod 564 converts the swing into precise linear displacement. The rear bottom of the first sector gear rod 561 and the second sector gear rod 562 are rotatably connected to the support 51 to ensure stable rotation of the transmission components. The bottoms of the first sector gear rod 563 and the second sector gear rod 564 mesh to ensure synchronous and symmetrical movement on both sides. The bottom of the shifting seat 565 is fixed to the lighting detection structure 57, directly transmitting the motion to the lighting detection structure 57 so that the lighting detection structure 57 can perform a downward pressing process.

[0032] The included angle formed by the second sector gear short rod 562 and the second sector gear long rod 564 is the same as the included angle formed by the first sector gear short rod 561 and the first sector gear long rod 563, ensuring balanced force on both sides, smooth movement, and avoiding jamming.

[0033] Please see Figure 2 , Figure 4 , Figure 5 and Figure 6 This invention provides a solar cell IV testing device. The illumination detection structure 57 includes a cover 571 fixed to the top middle side and the lower pressing structure 56. An illumination unit 572 is locked and fixed inside the upper middle side of the cover 571 to provide a light source and simulate test conditions. A pressure testing component 573 is arranged inside the lower middle side of the cover 571 to realize electrical performance contact detection. A first pressing component 574 and a second pressing component 575 with the same structure and size are respectively arranged on the left and right sides of the pressure testing component 573. The first pressing component 574 and the second pressing component 575 are respectively fastened to the left and right sides inside the cover 571, and the first pressing component 574 and the second pressing component 575 are located at the same horizontal height, which can horizontally press and position the solar cell on both sides to ensure the contact effect between the pressure testing component 573 and the solar cell.

[0034] The pressure testing assembly 573 includes columns 5731 fixed to the upper and lower sides of the housing 571. A support plate 5732 slides on the outer surface of the columns 5731, providing vertical guidance for the support plate 5732. An internally threaded block 5733 is embedded inside the support plate 5732 near the column 5731. A screw 5734 is threaded into the internally threaded block 5733. The top end of the screw 5734 is connected to the bottom output shaft of the second motor 5735. A protective cover 5736 is provided on the outer surface of the second motor 5735, and the rear side of the protective cover 5736 is fixed to the housing 571. The screw 5734... The top side rotates through the bottom of the protective cover 5736, and the second motor 5735 provides precise rotational power. After starting, the height of the support plate 5732 is adjusted and raised through the cooperation of the screw 5734 and the internal thread block 5733. The probe component 5737 for performing the final electrical performance test is installed through the middle side of the support plate 5732. The column 5731, the internal thread block 5733, the screw 5734, the second motor 5735 and the protective cover 5736 are all provided in two sets, and the two sets are located in the middle of the support plate 5732 and are arranged symmetrically to provide a balanced driving force and ensure the smoothness of the lifting of the support plate 5732.

[0035] The probe component 5737 includes a rectangular cover 57371 fastened to the top center of the support plate 5732. A third motor 57372 and a fourth motor 57373 are fastened to the left and right sides of the rectangular cover 57371, respectively. The bottom output shaft of the third motor 57372 is connected to a first swing arm 57374, and the other end of the first swing arm 57374 is rotatably connected to a first support rod 57375. The bottom output shaft of the fourth motor 57373 is connected to a second swing arm 57376, and the other end of the second swing arm 57376 is rotatably connected to a second support rod 57377. The second support rod 57377 is located away from the second swing arm 57375. One end of 376 is rotatably connected to the top of the first support rod 57375. The third motor 57372 and the fourth motor 57373 serve as power sources. A multi-link mechanism is formed through the two support rods and the two swing rods, which increases the degree of freedom of movement. A vertical rod 57378 is installed through the connection between the second support rod 57377 and the first support rod 57375. A probe 57379 is locked and fixed to the bottom side of the vertical rod 57378. The multi-link mechanism allows the vertical rod 57378 to drive the probe 57379 to adjust and change its position in multiple directions, so that the probe 57379 can directly contact the electrode of the solar cell to complete the acquisition of electrical signals.

[0036] The first pressing assembly 574 includes a carrier 5741 fixed to the front and rear sides of the cover 571. An electric push rod 5742, providing initial downward pressing power, is locked to the top side inside the carrier 5741. A gear 5743 is rotatably connected to the bottom output shaft of the electric push rod 5742. A first rack 5744 and a second rack 5745 mesh with the front and rear sides of the gear 5743, respectively, to convert the motion into linear motion of the two symmetrical racks. The first rack 5744 and the second rack 5745 slide longitudinally on the front and rear sides inside the carrier 5741, respectively. A first pressing frame 5746 is fixedly connected to the bottom of the first rack 5744, and the second rack 5745... A second pressure frame 5747 is fixedly connected to the bottom. The first pressure frame 5746 and the second pressure frame 5747 have the same structure and size. The linear movement of the two racks causes the first pressure frame 5746 and the second pressure frame 5747 to work together to press the solar cell on both sides. The two racks and the gear plate 5743 form a differential gear drive. After one of the pressure frames of the first pressure frame 5746 or the second pressure frame 5747 contacts and presses the solar cell, the other pressure frame rotates under the limit of the rack on that side of the gear plate 5743, thereby driving the other pressure frame to continue pressing down. This presses and positions the solar cell at two different heights, ensuring the stability of the solar cell.

[0037] The second pressure frame 5747 has a columnar groove on the inner side of its bottom. A spring 57471 is connected to the top side of the inside of the columnar groove. A protruding rod 57472 is connected to the bottom end of the spring 57471. The protruding rod 57472 slides through the bottom side of the inside of the columnar groove. The cooperation between the protruding rod 57472 and the spring 57471 provides a buffer force. After the protruding rod 57472 directly contacts the surface of the solar cell, it is allowed to float within a certain range to avoid crushing the solar cell and to adapt to the uneven surface of the solar cell.

[0038] The working principle of the solar cell IV detection device of the present invention is as follows:

[0039] First, during operation, the solar cell to be tested is fed into the device from the inlet 2 of the frame cover 1 and transported by the conveyor belt body 4 to the testing station directly below the testing mechanism 5. Subsequently, the testing mechanism 5 starts working, the first motor 53 starts, and transmits power to the first sector gear short rod 561 through the meshing transmission of the worm gear 54 and the worm wheel 55, and drives the second sector gear short rod 562 meshing with it to make synchronous reverse movement. Then, through the linkage of the first sector gear long rod 563 and the second sector gear long rod 564, the rotational motion is converted into the precise linear downward movement of the bottom displacement seat 565, thereby driving the entire illumination detection structure 57 to move smoothly downward. During this process, the sliding of the guide rod 58 along the inside of the protrusion 511 restricts the movement trajectory of the illumination detection structure 57, ensuring the accuracy of its vertical movement. When the illumination detection structure 57 descends to the lowest position, its bottom cover 571 contacts the conveyor belt body 4, forming a sealed testing space, effectively isolating the interference of external light on the test.

[0040] Second, after the illumination detection structure 57 is pressed into place, its internal illumination unit 572 is activated first to provide stable and standard illumination conditions for the solar cell below, simulating a real power generation environment. Then, the second motor 5735 of the pressure testing component 573 is activated, driving the screw 5734 to rotate. Through the threaded engagement with the internal thread block 5733, the support plate 5732 slides down along the column 5731, thereby adjusting the overall height of the probe component 5737 to bring it close to the surface of the solar cell. Subsequently, the third motor 57372 and the fourth motor 57373 in the probe component 5737 work in coordination according to the control signal. Through the multi-link mechanism composed of the first swing rod 57374, the second swing rod 57376, the first support rod 57375, and the second support rod 57377, the final position of the column 57378 and the probe 57379 is flexibly adjusted, so that the probe 57379 can accurately align with and contact the electrode grid lines of the solar cell, preparing the physical connection for subsequent electrical performance testing.

[0041] Third, while the probe 57379 is positioned, the first pressing assembly 574 and the second pressing assembly 575 located on both sides perform the pressing and fixing operation of the solar cell. The electric push rod 5742 pushes the gear plate 5743 downward. The gear plate 5743 meshes with the first rack 5744 and the second rack 5745 at the same time, thereby driving the first pressing frame 5746 and the second pressing frame 5747 to move downward. When the pressing frame on one side contacts the surface of the solar cell first, the movement of the rack on that side will be temporarily resisted, causing the gear plate 5743 to rotate slightly, thereby transmitting more driving force to the rack on the other side, causing the other pressing frame to continue to move downward, and finally achieving the sequential pressing at two different height points. The protruding rod 57472 and the spring 57471 at the bottom of the first pressing frame 5746 and the second pressing frame 5747 provide buffering to adapt to the unevenness of the solar cell surface, ensuring that the solar cell is firmly and smoothly pressed on the testing station, avoiding movement or vibration during the testing process.

[0042] Fourth, after all mechanical positioning and electrical contact are completed, the system enters the data acquisition stage. Under standard illumination, the solar cell generates photocurrent. The probe 57379 transmits the current and voltage signals at the contact point to the external IV tester, thereby plotting the current-voltage characteristic curve of the cell and completing the performance test.

[0043] Fifth, after the test is completed, all actuators are reset in reverse order: the probe 57379 is first lifted and removed from the solar cell by the motor drive, then the first pressing component 574 and the second pressing component 575 are released, the lighting unit 572 is turned off, and finally the pressing structure 56 drives the lighting detection structure 57 to rise as a whole under the reverse drive of the first motor 53, making room. The solar cell that has completed the test is sent out from the outlet 3 by the conveyor belt body 4, and the whole device is ready to welcome the next solar cell, thus realizing continuous automated testing.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A solar cell IV testing device, comprising a frame (1), wherein an inlet (2) and an outlet (3) are respectively provided on the left and right sides of the frame (1), and a conveyor belt body (4) for conveying solar cells is installed on the lower middle side inside the frame (1), characterized in that: The upper side of the frame (1) is connected to a detection mechanism (5) for IV testing of solar cells. The detection mechanism (5) includes a support (51) that is fastened to the frame (1) at the rear, a top cover (52) that is fixedly connected to the top of the support (51), a first motor (53) that is fastened to the top side inside the top cover (52), a worm (54) that is connected to the bottom output shaft of the first motor (53), a worm wheel (55) that meshes with the right side of the worm (54), a pressing structure (56) that is connected to the middle side of the rear of the worm wheel (55), and an illumination device that is fixed to the bottom end of the pressing structure (56). The detection structure (57) and two guide rods (58) are respectively fixed on the left and right sides of the top of the illumination detection structure (57). The worm (54) passes through and rotates in the middle of the bottom of the top cover (52), and the bottom end of the worm (54) is rotatably connected to the support (51). The middle part of the worm wheel (55) passes through and rotates in the right side of the inside of the support (51). The upper part of the pressing structure (56) is rotatably set in the inside of the support (51). The bottom of the left and right sides of the support (51) is provided with protrusions (511), and the two guide rods (58) slide through and slide in the two protrusions (511) respectively. The pressing structure (56) includes a first sector gear short rod (561) that rotates coaxially with the worm gear (55), a second sector gear short rod (562) that meshes with the left side of the first sector gear short rod (561), a first sector gear long rod (563) that is rotatably connected to the rear side of the right end of the first sector gear short rod (561), a second sector gear long rod (564) that is rotatably connected to the rear side of the left end of the second sector gear short rod (562), and a shifting seat (565) that is rotatably connected to the bottom of the first sector gear long rod (563) and the second sector gear long rod (564). The rear side of the bottom of the first sector gear short rod (561) and the second sector gear short rod (562) are rotatably connected to the support (51). The bottoms of the first sector gear long rod (563) and the second sector gear long rod (564) mesh with each other. The bottom of the shifting seat (565) is fixed to the lighting detection structure (57).

2. The solar cell IV detection device according to claim 1, characterized in that: When the lighting detection structure (57) is located at the bottom, its bottom is in contact with the conveyor belt body (4) to prevent external light sources from contacting the solar cells.

3. The solar cell IV detection device according to claim 1, characterized in that: The included angle formed by the second sector gear short rod (562) and the second sector gear long rod (564) is the same as the included angle formed by the first sector gear short rod (561) and the first sector gear long rod (563).

4. The solar cell IV detection device according to claim 1, characterized in that: The illumination detection structure (57) includes a cover (571) fixed to the top middle side and the lower pressing structure (56). An illumination unit (572) is locked and fixed inside the upper middle side of the cover (571), and a pressure testing component (573) is provided inside the lower middle side of the cover (571). A first pressure positioning component (574) and a second pressure positioning component (575) with the same structure and size are respectively provided on the left and right sides of the pressure testing component (573). The first pressure positioning component (574) and the second pressure positioning component (575) are respectively fastened to the left and right sides inside the cover (571), and the first pressure positioning component (574) and the second pressure positioning component (575) are located at the same horizontal height.

5. The solar cell IV detection device according to claim 4, characterized in that: The pressure testing assembly (573) includes a column (5731) fixed to the cover (571) on the upper and lower sides. A support plate (5732) is slidably wrapped around the outer surface of the column (5731). An internal thread block (5733) is embedded in the support plate (5732) on one side near the column (5731). A screw (5734) is threadedly connected inside the internal thread block (5733). The top end of the screw (5734) is connected to the bottom output shaft of the second motor (5735). A protective cover (5736) is provided on the outer surface of the second motor (5735), and the rear side of the protective cover (5736) is fixed to the cover (571). The top side of the screw (5734) rotates through the bottom of the protective cover (5736). A probe component (5737) is provided through the middle side inside the support plate (5732).

6. The solar cell IV detection device according to claim 5, characterized in that: The column (5731), internal thread block (5733), screw (5734), second motor (5735) and protective cover (5736) are each provided in two sets, and the two sets are located in the middle of the support plate (5732) and are arranged symmetrically from left to right.

7. The solar cell IV detection device according to claim 5, characterized in that: The probe component (5737) includes a rectangular cover (57371) fastened to the middle of the top of the support plate (5732). A third motor (57372) and a fourth motor (57373) are fastened to the left and right sides of the interior of the rectangular cover (57371), respectively. The bottom output shaft of the third motor (57372) is connected to a first swing arm (57374), and the other end of the first swing arm (57374) is rotatably connected to a first support rod (57375). The bottom output shaft of the fourth motor (57373) is connected to... The output shaft is connected to a second swing rod (57376), and the other end of the second swing rod (57376) is rotatably connected to a second support rod (57377). The end of the second support rod (57377) away from the second swing rod (57376) is rotatably connected to the top of the first support rod (57375). A vertical rod (57378) is provided through the connection between the second support rod (57377) and the first support rod (57375). A probe (57379) is locked and fixed on the bottom side of the vertical rod (57378).

8. The solar cell IV detection device according to claim 4, characterized in that: The first pressing assembly (574) includes a carrier (5741) fixed to the cover (571) on the front and rear sides. An electric push rod (5742) is locked and fixed inside the top side of the carrier (5741). A gear plate (5743) is rotatably connected to the bottom output shaft of the electric push rod (5742). A first rack (5744) and a second rack (5745) are respectively meshed and driven on the front and rear sides of the gear plate (5743). The first rack (5744) and the second rack (5745) slide longitudinally on the front and rear sides inside the carrier (5741). A first pressing frame (5746) is fixedly connected to the bottom of the first rack (5744), and a second pressing frame (5747) is fixedly connected to the bottom of the second rack (5745). The first pressing frame (5746) and the second pressing frame (5747) have the same structure and size.

9. The solar cell IV detection device according to claim 8, characterized in that: The second pressure frame (5747) has a columnar groove on the inner side of its bottom. A spring (57471) is connected to the top side of the inside of the columnar groove. A protruding rod (57472) is connected to the bottom end of the spring (57471). The protruding rod (57472) slides through the bottom side of the inside of the columnar groove.

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