Solar cell testing device

Abstract

A solar cell testing device, belonging to the field of solar cell manufacturing technology, addresses the problem of cumbersome fixing and repeated disassembly / reassembly during solar panel testing, which can easily damage the panels. The invention includes a testing chamber and support frames fixedly installed on both sides of the testing chamber. During testing, the two connecting ends of the solar panel are fixed by limiting components. After initial visual inspection in a visual inspection chamber, the panel enters a power-on testing chamber where movable components extend the two connecting ends outwards, connecting them to the power-on testing components to connect the power supply. A lamp is then turned on to charge the solar panel. In practical use, this solar cell testing device allows for multiple tests to be performed sequentially with a single fixing, eliminating the need for disassembly and preventing damage to the solar panels during testing.

Description

Technical Field

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

[0002] A solar cell is a device that can directly convert sunlight into electrical energy, and it is mainly made of semiconductor materials such as silicon. It is generally divided into two types: monocrystalline silicon and polycrystalline silicon. After initial production, the appearance and internal circuit connections of the solar cell need to be tested before the next stage of production can proceed.

[0003] For example, a testing device for solar cells, as disclosed in CN117544111 B, includes a monitoring mechanism, which further includes a monitoring device. A limiting device is installed on the side of the top of the monitoring device. The monitoring device has a monitoring system inside. The limiting device also includes an outer limiting clamp. An adjustment mechanism is installed on the inner wall of one side of the outer limiting clamp. This invention, by including the limiting device and the monitoring system, facilitates the monitoring system to determine the real-time status of the solar cells by using the specific values ​​of each set of pressure data L. When the monitoring system detects a positional shift in the solar cells, it controls the adjustment mechanism to perform corresponding positional adjustment. This invention, by including the monitoring system and the adjustment mechanism, facilitates the use of an electronically controlled position moving device to drive the positional shift area of ​​the solar cells back to the normal range.

[0004] The invention described above can correct the deviation of the battery cells being tested. However, in actual testing, the internal testing capacity of the device is limited, and the testing of the battery cells requires multiple tests. These multiple tests require repeated disassembly and reassembly of the battery cells, which can easily damage the battery cells and increase the defect rate. Therefore, the invention has poor applicability in actual production testing.

[0005] To address the above problems, a solar cell testing device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a solar cell testing device. By using this device, the problems mentioned above can be solved, such as the limited number of types that can be tested internally during actual testing, the need for multiple tests for solar cells, and the repeated disassembly and reassembly of the solar cells, which can easily damage the solar cells and increase the defect rate. Therefore, the device is not very applicable to actual production testing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a solar cell testing device, comprising a test chamber and support frames fixedly installed on both sides of the test chamber, a transmission belt sleeved between the two support frames, the transmission belt being inserted into the interior of the test chamber, a control panel fixedly installed on the outer wall of the test chamber, a connecting plate fixedly installed on the transmission belt, limit components provided on both sides of the upper end of the connecting plate, a movable component provided between the two limit components, and a fixing plate fixedly installed between the two ends of the connecting plate and the transmission belt, a visual inspection chamber and an electrical detection chamber respectively opened on both sides of the interior of the test chamber, a visual inspection probe fixedly installed on the upper inner wall of the visual inspection chamber, a plurality of lamp tubes fixedly installed at equal intervals on the upper inner wall of the electrical detection chamber, and an electrical detection component and a marking component respectively provided on the inner wall of the electrical detection chamber.

[0008] Furthermore, the limiting component includes fixed blocks fixedly installed on both sides of the upper end of the connecting plate. Each fixed block has a slot, and each inner wall of the slot has a sliding groove. Each sliding groove has a locking block slidably installed in the sliding groove. A spring is fixedly installed between the inner wall of the locking block and the inner wall of the sliding groove. The upper side of the locking block is an arc-shaped surface.

[0009] Furthermore, the movable component includes a housing fixedly mounted on the connecting plate, with connecting grooves on both sides of the housing, and a bidirectional push rod fixedly mounted between the two connecting grooves, with both ends of the bidirectional push rod being fixedly connected to the side wall of the fixed block respectively.

[0010] Furthermore, the power-on testing assembly includes a socket fixedly installed on the side wall of the power-on testing chamber. A battery cell is fixedly installed on the inner wall of the socket, and a movable tube is slidably installed on the outer side of the battery cell. The movable tube is slidably connected to the inner wall of the test box. An installation groove is provided on the inner side of the socket, and a spring is fixedly installed between the side wall of the movable tube and the inner wall of the installation groove.

[0011] Furthermore, an end plate is fixedly installed at one end of the movable tube, a fixing rod is fixedly installed between the inner walls of both sides of the mounting groove, a conductive plate is rotatably installed on the fixing rod, a spring is fixedly installed between the upper side wall of the conductive plate and the inner wall of the mounting groove, and an end plate is fixedly installed on the upper side wall of the mounting groove.

[0012] Furthermore, the marking assembly includes a mounting plate fixedly installed on the side wall of the power-on detection chamber. A motor is fixedly installed at the lower end of the mounting plate, and a rotating rod is fixedly installed at the output end of the motor. A connecting block is fixedly installed on the side wall of the rotating rod, and a marker pen is slidably connected inside the connecting block. A spring is fixedly installed between the side wall of the marker pen and the inner wall of the connecting block.

[0013] Furthermore, one end of the mounting plate is provided with an ink replenishment component, the ink replenishment component includes a mounting block fixedly installed at one end of the mounting plate, the lower end of the mounting block is provided with a movable groove, a slider is slidably connected inside the movable groove, a sponge block is fixedly installed on the slider, and the sponge block is in contact with the tip of the marker pen.

[0014] Furthermore, a spring is fixedly installed on the inner wall of the movable groove and the side wall of the slider. A slot is opened at the lower end of the mounting block, and a movable block is rotatably installed at the lower end of the slider. The movable block is slidably connected in the slot.

[0015] Furthermore, limit rods are fixedly installed on both sides of the movable block, and arc-shaped grooves are provided on both sides of the slot, with the limit rods slidably connected in the arc-shaped grooves.

[0016] Furthermore, control rod one and control rod two are fixedly installed on one side wall of the connecting plate, and both control rod one and control rod two come into contact with the movable block when they move.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] During battery cell testing, the two connecting ends of the battery cell are fixed and clamped by the limiting component. The connecting plate and the battery cell as a whole can be moved by the transmission belt, and the appearance and internal circuit of the battery cell can be inspected during the movement. During the testing process, the connecting end of the battery cell fixed on the limiting component can be moved by the movable component to connect with the power-on test component to complete the power-on test. After the appearance inspection is completed, the battery cell is charged by light through the lamp tube in the power-on test chamber. During charging, the marker pen can be rotated in conjunction with the motor to mark the surface of the battery cell. Four different markings correspond to four different conditions, which can classify the battery cells and intuitively understand the internal circuit of the machine, facilitating quick repair. Attached Figure Description

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall longitudinal cross-sectional structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the connecting plate system structure of the present invention;

[0023] Figure 5 This is a cross-sectional structural diagram of the limiting component system of the present invention;

[0024] Figure 6 This is a schematic cross-sectional view of the active component system of the present invention;

[0025] Figure 7 This is a schematic diagram of the marking component system structure of the present invention;

[0026] Figure 8 This is a schematic cross-sectional view of the marking component system of the present invention;

[0027] Figure 9 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0028] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point B;

[0029] Figure 11 This is a circuit diagram of the power-on test chamber detection circuit of the present invention;

[0030] Figure 12 This is a flowchart of the present invention.

[0031] In the diagram: 1. Test chamber; 11. Visual inspection chamber; 111. Visual inspection probe; 12. Power-on detection chamber; 121. Lamp tube; 13. Mounting slot; 2. Support frame; 3. Drive belt; 4. Connecting plate; 41. Limiting component; 411. Fixing block; 412. Slot; 413. Slide; 414. Locking block; 415. Spring one; 42. Movable component; 421. Housing; 422. Connecting slot; 423. Bidirectional push rod; 43. Control rod one; 44. Control rod two; 45. Fixing plate; 5. Control panel; 6. Power-on test assembly; 61. Socket; 62. Battery cell; 63. Movable tube; 64. Spring 2; 65. End plate 1; 66. Fixing rod; 67. Conductive plate; 68. End plate 2; 69. Spring 3; 7. Marking assembly; 71. Mounting plate; 72. Motor; 73. Rotating rod; 74. Connecting block; 75. Marker pen; 76. Spring 4; 8. Ink replenishment assembly; 81. Mounting block; 82. Movable groove; 83. Slider; 84. Sponge block; 85. Spring 5; 86. Movable block; 87. Slot; 88. Arc groove; 89. Limiting rod. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] To address the technical issues of cumbersome fixing and repeated disassembly / reassembly during solar panel testing, which can easily damage the panels, such as... Figure 1 - Figure 7 As shown, the following preferred technical solution is provided: A solar cell testing device includes a test chamber 1 and support frames 2 fixedly installed on both sides of the test chamber 1. A transmission belt 3 is sleeved between the two support frames 2. The transmission belt 3 is inserted inside the test chamber 1. A control panel 5 is fixedly installed on the outer wall of the test chamber 1. A connecting plate 4 is fixedly installed on the transmission belt 3. Limiting components 41 are provided on both sides of the upper end of the connecting plate 4. A movable component 42 is provided between the two limiting components 41. Fixed plates 45 are fixedly installed between the two ends of the connecting plate 4 and the transmission belt 3. A visual inspection chamber 11 and an electrical detection chamber 12 are respectively opened on both sides of the interior of the test chamber 1. A visual inspection probe 111 is fixedly installed on the upper inner wall of the visual inspection chamber 11. A plurality of lamp tubes 121 are fixedly installed at equal intervals on the upper inner wall of the electrical detection chamber 12. An electrical detection component 6 and a marking component 7 are respectively provided on the inner wall of the electrical detection chamber 12.

[0034] Specifically, during the testing of the solar panel, the two connecting ends of the solar panel are fixed by the limiting components 41 on both sides. After the fixing is completed, the drive belt 3 can be started through the control panel 5. The drive belt 3 drives the connecting plate 4 and the solar panel fixed on it to enter the test chamber 1 along the drive belt 3. First, the surface of the solar panel is scanned by the vision inspection probe 111 in the vision inspection chamber 11 for preliminary appearance inspection. After the inspection is completed, it enters the power-on testing chamber 12, and the two connecting ends of the solar cell are extended outward by the movable component 42. When the power supply is connected to the power-on test component 6, multiple lamps 121 installed in the power-on test chamber 12 light up, generating light energy to charge the solar cell. At the same time as the power-on test component 6 is powered on, the marking component 7 is also powered on. If the circuit between the two is normal and can form a closed loop, the solar cell will be marked by the marking component 7. In actual use, this solar cell testing device can perform multiple tests in sequence by fixing it once. There is no need to disassemble during the test, which can prevent damage to the solar cell during the test and can mark the test results accordingly.

[0035] To address the technical problem of restricted movement of the battery cell connection points during power-on testing, such as... Figure 4 - Figure 6 As shown, the following preferred technical solution is provided: The limiting component 41 includes a fixing block 411 fixedly installed on both sides of the upper end of the connecting plate 4. Each fixing block 411 is provided with a slot 412. Each inner wall of the slot 412 is provided with a sliding groove 413. Each sliding groove 413 is slidably installed with a locking block 414. A spring 415 is fixedly installed between the inner wall of the locking block 414 and the inner wall of the sliding groove 413. The upper side of the locking block 414 is an arc surface. The two connecting ends of the solar cell are slidably placed on the fixing block 411 along the slot 412. The connecting ends of the solar cell that have slid into the slot 412 can be fixedly clamped by the cooperation of the locking block 414 and the spring 415.

[0036] The movable component 42 includes a housing 421 fixedly mounted on the connecting plate 4. Both sides of the housing 421 are provided with connecting grooves 422. A bidirectional push rod 423 is fixedly mounted between the two connecting grooves 422. The two ends of the bidirectional push rod 423 are respectively fixedly connected to the side wall of the fixed block 411. The fixed blocks 411 on both sides can be pushed outward simultaneously by the bidirectional push rod 423.

[0037] Specifically, when installing the solar cell, the connecting ends on both sides of the solar cell can be pulled out and slid downwards along the slot 412. When sliding downwards, the connecting ends push the locking blocks 414 on both sides of the slot 412 into the slide groove 413, so that the locking blocks 414 on both sides slide into the slide groove 413. When it moves downwards to the maximum movable distance, the connecting ends between the locking blocks 414 on both sides can be automatically clamped and fixed under the action of the springs 415 on both sides. When it is necessary to perform power-on testing, the fixing block 411 can be pushed to both sides by activating the bidirectional push rod 423. When the fixing block 411 moves to both sides, it drives the connecting end clamped at its upper end to slide into the socket 61 for connection. The device facilitates the fixing and clamping of the two connecting ends of the solar cell by setting the limiting component 41. During the test, the connecting ends of the solar cell on both sides can be moved and inserted into the power supply for testing by activating the bidirectional push rod 423. The control is flexible.

[0038] To address the technical problem of not being able to visually display test results for inspected solar cells, such as... Figure 7 - Figure 12As shown, the following preferred technical solution is provided: The power-on test assembly 6 includes an insertion hole 61 fixedly installed on the side wall of the power-on test chamber 12. A battery cell 62 is fixedly installed on the inner wall of the insertion hole 61. A movable tube 63 is slidably installed on the outer side of the battery cell 62. The movable tube 63 is slidably connected to the inner wall of the test chamber 1. An installation groove 13 is opened on the inner side of the insertion hole 61. A spring 64 is fixedly installed between the side wall of the movable tube 63 and the inner wall of the installation groove 13. When the connection end of the solar cell is inserted into the insertion hole 61, the connection end and the battery cell 62 come into contact and are energized. During the insertion process, the movable tube 63 will be pushed into the insertion hole 61. The spring 64 can reset the movable tube 63 after it has moved.

[0039] An end plate 65 is fixedly installed at one end of the active tube 63. A fixing rod 66 is fixedly installed between the inner walls of both sides of the mounting groove 13. A conductive plate 67 is rotatably installed on the fixing rod 66. A spring 69 is fixedly installed between the upper side wall of the conductive plate 67 and the inner wall of the mounting groove 13. An end plate 68 is fixedly installed on the upper side wall of the mounting groove 13. In the initial case, the power is connected between the end plate 68 and the conductive plate 67. When the connection end of the solar cell is inserted, the end plate 65 contacts the conductive plate 67 to form a closed circuit. The clamping force provided by the two springs 415 to the solar cell is greater than the elastic force of the spring 69 on the conductive plate 67.

[0040] The marking assembly 7 includes a mounting plate 71 fixedly installed on the side wall of the power-on detection chamber 12. A motor 72 is fixedly installed at the lower end of the mounting plate 71. A rotating rod 73 is fixedly installed at the output end of the motor 72. A connecting block 74 is fixedly installed on the side wall of the rotating rod 73. A marker pen 75 is slidably connected inside the connecting block 74. A spring 76 is fixedly installed between the side wall of the marker pen 75 and the inner wall of the connecting block 74. When the marker pen 75 is rotated by the motor 72, it can be pushed further by the spring 76 to mark the surface of the solar cell being tested at the lower end.

[0041] One end of the mounting plate 71 is provided with an ink replenishment component 8. The ink replenishment component 8 includes a mounting block 81 fixedly mounted on one end of the mounting plate 71. The lower end of the mounting block 81 is provided with a movable groove 82. A slider 83 is slidably connected inside the movable groove 82. A sponge block 84 is fixedly mounted on the slider 83. The sponge block 84 is in contact with the tip of the marker pen 75. In the initial state, the marker pen 75 and the sponge block 84 are in contact, which can keep the marker pen tip with sufficient ink for marking.

[0042] The inner wall of the movable groove 82 and the side wall of the slider 83 are fixedly installed with a spring 85. The lower end of the mounting block 81 is provided with a slot 87. The lower end of the slider 83 is rotatably installed with a movable block 86. The movable block 86 is slidably connected in the slot 87. The spring 85 can press the slider 83 against the position where the sponge block 84 contacts the marker pen 75.

[0043] Limiting rods 89 are fixedly installed on both sides of the movable block 86, and arc-shaped grooves 88 are opened on both sides of the slot 87. The limiting rods 89 are slidably connected in the arc-shaped grooves 88, and the limiting rods 89 can prevent the movable block 86 from rotating when it moves in a straight line.

[0044] Control lever 1 43 and control lever 2 44 are fixedly installed on one side wall of the connecting plate 4. When control lever 1 43 and control lever 2 44 move, they both come into contact with the movable block 86. When control lever 1 43 comes into contact with the movable block 86, the slider 83 and the sponge block 84 can be pulled into the movable groove 82 to prevent the pen tip from directly contacting the sponge block 84 when the marker pen 75 rotates, which would cause the sponge block 84 to break and affect the ink replenishment effect.

[0045] When no test is performed, the conductive plate 67, end plate 2 68, and motor 72 form a closed loop. The circuit connected to end plate 2 68 has an initial power supply, which can be used to detect whether the marking circuit inside the device is energized. When the test is performed, the solar cell, end plate 1 65, conductive plate 67, and motor 72 form a closed loop, and motor 72 is connected in parallel between the two loops.

[0046] Specifically, after the device completes visual inspection, it enters the power-on detection chamber 12 and activates the lamp 121 to charge the solar cells. When the transmission belt 3 drives the connecting plate 4 to the position where the connecting ends of the solar cells are aligned with the socket 61, the connecting end can be inserted into the socket 61 by the bidirectional push rod 423 in the movable component 42. During insertion, the connecting end contacts the cell 62 to connect the power supply. During the inward push, the connecting end pushes the movable tube 63 into the socket 61. When the movable tube 63 moves, it drives the end plate 65 to move inward and contact the rotatable conductive plate 67. During the movement of the connecting plate 4, the control rod 43 at its front end first contacts the movable block 86 and drives the movable block 86 to slide along the slot 87. When the movable block 86 moves, it drives the slider 83 and the sponge block 84 to slide away from the marker pen 75 along the movable groove 82. At this time, the conductive plate 67, the end plate 65, the solar cell connecting end, and the motor 72 are all connected. When the power is connected, the current generated by the solar cell starts the motor 72, which drives the marker pen 75 to rotate and mark the surface of the solar cell. The motor 72 is programmed to rotate only once per power-on cycle, rotating the marker pen 75 one full turn before returning it to its original position. After testing the solar cell's solar energy conversion, the two connecting ends of the solar cell are pulled back to their original positions via the bidirectional push rod 423, and the solar cell is moved again via the transmission belt 3. During this movement, control rod 1 43 slides away from the lower end of the movable block 86. After the movable block 86 moves along the arc groove 88 to its end, spring 5 85 automatically pushes the slider 83 back to its original position. Then, control rod 2 44 repeats the above steps, pushing the movable block 86 to slide along the arc groove 88. There is no pause during this process; control rod 2 44 can be released from control of the movable block 86 during movement, allowing it to automatically return to its original position. This device has four different marking scenarios:

[0047] First, when the internal circuitry of the solar cell and the internal circuitry between the solar cell and the end plate 68 are functioning normally, after passing through control lever 43 and control lever 44, two marks will be generated on the solar cell.

[0048] Second, when the circuit in the solar cell is normal but the circuit connecting to end plate 68 is faulty, a mark will only be generated on the front end of the solar cell.

[0049] Third, when the circuit in the solar cell fails and short-circuits, but the circuit connected to end plate 68 is normally connected, only a mark will be generated on the rear end of the solar cell.

[0050] Fourth, when the circuits in the solar cell and the circuits connected to end plate 68 cannot be connected, the motor 72 will not be powered on and started during the test, and no mark will be generated on the solar cell.

[0051] The tested solar cells can be classified using four different markings, and damage to the internal components of the device can be displayed, allowing for immediate repair upon discovery and facilitating the testing of solar cells.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A solar cell testing device, comprising a test chamber (1) and support frames (2) fixedly installed on both sides of the test chamber (1), wherein a transmission belt (3) is sleeved between the two support frames (2), the transmission belt (3) is inserted inside the test chamber (1), and a control panel (5) is fixedly installed on the outer wall of the test chamber (1), characterized in that: A connecting plate (4) is fixedly installed on the transmission belt (3). Limiting components (41) are provided on both sides of the upper end of the connecting plate (4). A movable component (42) is provided between the two limiting components (41). A fixing plate (45) is fixedly installed between the two ends of the connecting plate (4) and the transmission belt (3). A visual inspection chamber (11) and an electrical detection chamber (12) are respectively opened on both sides of the interior of the test box (1). A visual inspection probe (111) is fixedly installed on the upper inner wall of the visual inspection chamber (11). Several lamp tubes (121) are fixedly installed at equal intervals on the upper inner wall of the electrical detection chamber (12). An electrical testing component (6) and a marking component (7) are respectively provided on the inner wall of the electrical detection chamber (12). The marking assembly (7) includes a mounting plate (71) fixedly installed on the side wall of the power-on detection chamber (12); One end of the mounting plate (71) is provided with an ink replenishment component (8). The ink replenishment component (8) includes a mounting block (81) fixedly installed at one end of the mounting plate (71). The lower end of the mounting block (81) is provided with a movable groove (82). A slider (83) is slidably connected inside the movable groove (82). A movable block (86) is rotatably installed at the lower end of the slider (83). Control rod one (43) and control rod two (44) are fixedly installed on one side wall of the connecting plate (4). When the control rod one (43) and the control rod two (44) move, they both come into contact with the movable block (86).

2. The solar cell testing device according to claim 1, characterized in that: The limiting component (41) includes a fixing block (411) fixedly installed on both sides of the upper end of the connecting plate (4). Each fixing block (411) has a slot (412) and a sliding groove (413) on both sides of the inner wall of the slot (412). Each sliding groove (413) on both sides has a locking block (414) slidably installed in the sliding groove (413). A spring (415) is fixedly installed between the inner wall of the locking block (414) and the inner wall of the sliding groove (413). The upper side of the locking block (414) is an arc surface.

3. The solar cell testing device according to claim 2, characterized in that: The active component (42) includes a housing (421) fixedly installed on the connecting plate (4). Both sides of the housing (421) are provided with connecting grooves (422). A bidirectional push rod (423) is fixedly installed between the two connecting grooves (422). The two ends of the bidirectional push rod (423) are respectively fixedly connected to the side wall of the fixing block (411).

4. The solar cell testing device according to claim 1, characterized in that: The power-on test assembly (6) includes a socket (61) fixedly installed on the side wall of the power-on test chamber (12). A battery cell (62) is fixedly installed on the inner wall of the socket (61). A movable tube (63) is slidably installed on the outer side of the battery cell (62). The movable tube (63) is slidably connected to the inner wall of the test box (1). An installation groove (13) is opened on the inner side of the socket (61). A spring (64) is fixedly installed between the side wall of the movable tube (63) and the inner wall of the installation groove (13).

5. A solar cell testing device according to claim 4, characterized in that: One end plate (65) is fixedly installed at one end of the movable tube (63). A fixing rod (66) is fixedly installed between the inner walls of both sides of the mounting groove (13). A conductive plate (67) is rotatably installed on the fixing rod (66). A spring (69) is fixedly installed between the upper side wall of the conductive plate (67) and the inner wall of the mounting groove (13). An end plate (68) is fixedly installed on the upper side wall of the mounting groove (13).

6. The solar cell testing device according to claim 1, characterized in that: A motor (72) is fixedly installed at the lower end of the mounting plate (71). A rotating rod (73) is fixedly installed at the output end of the motor (72). A connecting block (74) is fixedly installed on the side wall of the rotating rod (73). A marker pen (75) is slidably connected inside the connecting block (74). A spring (76) is fixedly installed between the side wall of the marker pen (75) and the inner wall of the connecting block (74).

7. A solar cell testing device according to claim 6, characterized in that: A sponge block (84) is fixedly installed on the slider (83), and the sponge block (84) is in contact with the tip of the marker pen (75).

8. A solar cell testing device according to claim 7, characterized in that: The inner wall of the movable groove (82) and the side wall of the slider (83) are fixedly installed with a spring five (85). The lower end of the mounting block (81) is provided with a slot (87), and the movable block (86) is slidably connected in the slot (87).

9. A solar cell testing device according to claim 8, characterized in that: Limiting rods (89) are fixedly installed on both sides of the movable block (86), and arc-shaped grooves (88) are opened on both sides of the slot (87). The limiting rods (89) are slidably connected in the arc-shaped grooves (88).

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