Solar cell testing device

Abstract

A solar cell testing device belongs to the technical field of solar cell production, and aims to solve the problems that a solar cell panel is tedious to fix during detection and is easy to damage due to repeated disassembly and assembly, and comprises a testing box body and support frames fixedly mounted on two sides of the testing box body, when a solar cell panel is tested, the two connecting ends of the solar cell panel are fixed through the limiting assemblies, preliminary appearance detection is conducted through the visual detection cavity, the solar cell panel enters the power-on detection cavity after detection is completed, the two connecting ends of the solar cell panel extend outwards through the movable assemblies, and the solar cell panel is fixed through the movable assemblies. When the solar cell testing device is actually used, multiple tests can be carried out in sequence through one-time fixation, disassembly and assembly are not needed in the testing process, and the solar cell can be prevented from being damaged in the testing process.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell production, in particular to a solar cell testing device. Background Art

[0002] Solar cells are devices that can directly convert sunlight into electrical energy. They are mainly made of semiconductor materials such as silicon. They are usually divided into two types: monocrystalline silicon and polycrystalline silicon. After the initial production is completed, the appearance of the cell, the connection status of the internal circuit, etc. need to be tested before the next step of production and processing can be carried out.

[0003] For example, a testing device for solar cells with announcement number CN117544111 B includes a monitoring mechanism, which also includes a monitoring device. A limiting device is installed on the side of the top of the monitoring device, and a monitoring system is provided inside the monitoring device. The limiting device also includes an outer limiting clamp, and an adjusting mechanism is installed on the inner wall of one side of the outer limiting clamp. The invention is provided with a limiting device and a monitoring system, which is beneficial for the monitoring system to judge the real-time status of the solar cell through the specific values ​​of each group of pressure data L. When the monitoring system detects that the solar cell has a position offset, the adjusting mechanism is controlled to adjust the corresponding position. The invention is provided with a monitoring system and an adjusting mechanism, which is beneficial for the electric control position moving device to drive the position offset area of ​​the solar cell to move to a normal range.

[0004] The above invention can correct the deviation of the battery cell being tested, but in actual testing, the types of tests that can be tested inside the device are relatively small, and the testing of the battery cell requires multiple tests, which require repeated disassembly and assembly of the battery cell. The battery cell is easily damaged during the disassembly and assembly process, increasing the defective rate of the battery. Therefore, it is less applicable in actual production testing.

[0005] In view of the above problems, a solar cell testing device is proposed. Summary of the invention

[0006] The object of the present invention is to provide a solar cell testing device, which is used to work, so as to solve the problem that when actually performing detection, the types of tests that can be tested inside the device are relatively small, and the detection of the cell requires multiple tests, and the multiple tests require repeated disassembly and assembly of the cell, which can easily cause damage to the cell during the disassembly and assembly process, increase the defective rate of the battery, and therefore have poor applicability during actual production detection.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solar cell testing device, comprising a test box and support frames fixedly installed on both sides of the test box, a transmission belt is commonly sleeved between the two support frames, the transmission belt is inserted and arranged inside the test box, a control panel is fixedly installed on the outer wall of the test box, a connecting plate is fixedly installed on the transmission belt, both sides of the upper end of the connecting plate are provided with limit assemblies, a movable assembly is commonly arranged between the two limit assemblies, a fixing plate is commonly fixedly installed between the two ends of the connecting plate and the transmission belt, a visual inspection chamber and a power-on inspection chamber are respectively opened on both sides of the interior of the test box, a visual inspection probe is fixedly installed on the upper inner wall of the visual inspection chamber, a plurality of lamps are fixedly installed on the upper inner wall of the power-on inspection chamber at equal intervals, and a power-on test assembly and a marking assembly are respectively arranged on the inner walls of the power-on inspection chamber.

[0008] Furthermore, the limiting assembly includes fixed blocks fixedly installed on both sides of the upper end of the connecting plate, the fixed blocks are provided with card slots, the inner walls on both sides of the card slots are provided with sliding grooves, card blocks are slidably installed in the sliding grooves on both sides, a spring is fixedly installed between the inner wall of the card block and the inner wall of the sliding groove, and the upper end side edges of the card blocks are both arc-shaped surfaces.

[0009] Furthermore, the movable component includes a shell fixedly mounted on the connecting plate, connecting grooves are provided on both sides of the shell, a bidirectional push rod is fixedly mounted between the two connecting grooves, and both ends of the bidirectional push rod are respectively fixedly connected to the side walls of the fixed block.

[0010] Furthermore, the power-on test component includes a socket fixedly installed on the side wall of the power-on detection chamber, a battery cell is fixedly installed on the inner wall of the socket, 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 opened on the inner side of the socket, and a spring 2 is fixedly installed between the side wall of the movable tube and the inner wall of the installation groove.

[0011] Furthermore, an end plate 1 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 3 is fixedly installed between the upper side wall of the conductive plate and the inner wall of the mounting groove, and an end plate 2 is fixedly installed on the upper side wall of the mounting groove.

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

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

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

[0015] Furthermore, limiting rods are fixedly installed on both sides of the movable block, arc grooves are formed on both sides of the slot, and the limiting rods are slidably connected in the arc grooves.

[0016] Furthermore, a control rod 1 and a control rod 2 are fixedly mounted on the side wall of one end of the connecting plate, and the control rod 1 and the control rod 2 are in contact with the movable block when they move.

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

[0018] When testing the battery cell, the two connecting ends of the battery cell can be fixedly clamped by the limit assembly, and the connecting plate and the battery cell as a whole can be driven to move by the transmission belt, and the appearance and internal circuit conditions of the battery cell can be tested during the movement; during the testing process, the connecting end of the battery cell fixed on the limit assembly can be driven to move by the movable assembly, and connected to the power-on test assembly to complete the power-on test; after completing the appearance inspection, the lamp in the power-on test chamber is used for light charging, and when charging, it can cooperate with the motor to drive the marker pen to rotate to complete the marking of the surface of the battery cell. Four different marks correspond to four different situations. While classifying the battery cells, the circuit conditions inside the machine can be intuitively understood, which is convenient for quick maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the position limiting assembly system of the present invention;

[0024] Figure 6 It is a cross-sectional structural diagram of the movable component system of the present invention;

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

[0026] Figure 8 It is a schematic diagram of the cross-sectional structure of the marking assembly of the present invention;

[0027] Fig. 9 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Fig.10 For the present invention Figure 8 The enlarged structural diagram at B in the middle;

[0029] Fig.11 It is a detection circuit diagram of the energized test chamber of the present invention;

[0030] Fig.12 It is a flow chart of the present invention.

[0031] In the figure: 1. test box; 11. visual inspection chamber; 111. visual inspection probe; 12. power-on inspection chamber; 121. lamp tube; 13. mounting slot; 2. support frame; 3. transmission belt; 4. connecting plate; 41. limit assembly; 411. fixing block; 412. slot; 413. slide slot; 414. block; 415. spring 1; 42. movable assembly; 421. housing; 422. connecting slot; 423. two-way push rod; 43. control lever 1; 44. control lever 2; 45. fixing plate; 5. control panel; 6. Power-on test assembly; 61, socket; 62, battery cell; 63, movable tube; 64, spring two; 65, end plate one; 66, fixing rod; 67, conductive plate; 68, end plate two; 69, spring three; 7, marking assembly; 71, mounting plate; 72, motor; 73, rotating rod; 74, connecting block; 75, marking pen; 76, spring four; 8, ink filling assembly; 81, mounting block; 82, movable groove; 83, slider; 84, sponge block; 85, spring five; 86, movable block; 87, slot; 88, arc groove; 89, limit rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to solve the technical problems of cumbersome fixation during solar panel inspection and multiple disassembly and assembly that may easily lead to damage to the panels, such as Figure 1 - Figure 7 As shown, the following preferred technical scheme is provided: a solar cell testing device, comprising a test box 1 and support frames 2 fixedly installed on both sides of the test box 1, a transmission belt 3 is commonly sleeved between the two support frames 2, the transmission belt 3 is inserted and arranged inside the test box 1, a control panel 5 is fixedly installed on the outer wall of the test box 1, a connecting plate 4 is fixedly arranged on the transmission belt 3, both sides of the upper end of the connecting plate 4 are provided with limit components 41, a movable component 42 is commonly arranged between the two limit components 41, a fixing plate 45 is commonly fixedly installed between the two ends of the connecting plate 4 and the transmission belt 3, a visual inspection chamber 11 and a power-on inspection 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, a plurality of lamp tubes 121 are equidistantly fixedly installed on the upper inner wall of the power-on inspection chamber 12, and a power-on test component 6 and a marking component 7 are respectively arranged on the inner wall of the power-on inspection chamber 12.

[0034] Specifically, when testing the solar panel, the two connection ends of the solar panel are respectively fixed by the limit components 41 on both sides. After the fixing is completed, the transmission belt 3 can be started through the control panel 5. The transmission belt 3 starts to drive the connecting plate 4 and the solar panel fixed on the upper end thereof to enter the interior of the test box 1 along the transmission belt 3. The surface of the solar panel is first scanned by the visual inspection probe 111 in the visual inspection chamber 11 for a preliminary appearance inspection. After the inspection is completed, it enters the power-on inspection chamber 12, and the two connection ends of the solar cell are extended outward through the movable component 42. The power is turned on when the power-on test component 6 is connected to the power supply. At this time, multiple lamps 121 arranged in the power-on detection chamber 12 light up, generate light energy to charge the solar cell, and when the power-on test component 6 is powered on, the marking component 7 is also powered on. When the circuit between the two can form a closed loop normally, the solar cell will be marked by the marking component 7. When the solar cell test device is actually used, multiple tests can be performed in sequence by fixing it once. There is no need to disassemble during the test, which can prevent the solar cell from being damaged during the test, and the test results can be marked accordingly.

[0035] In order to solve the technical problem that the connection end of the battery cell is inconvenient to move for power-on testing during the test, such as Figure 4 - Figure 6 As shown, the following preferred technical solutions are provided: the limiting component 41 includes a fixed block 411 fixedly installed on both sides of the upper end of the connecting plate 4, the fixed block 411 is provided with a card slot 412, the inner walls of both sides of the card slot 412 are provided with a slide groove 413, and a card block 414 is slidably installed in the slide grooves 413 on both sides, and a spring 415 is fixedly installed between the inner wall of the card block 414 and the inner wall of the slide groove 413, and the upper end side edges of the card block 414 are both arc-shaped surfaces, and the two connecting ends of the solar cell are respectively slidably set on the fixed block 411 along the card slot 412, and the connecting end of the solar cell that slides into the card slot 412 can be fixedly clamped by the cooperation of the card block 414 and the spring 415.

[0036] The movable component 42 includes a shell 421 fixedly mounted on the connecting plate 4, and connecting grooves 422 are provided on both sides of the shell 421. A two-way push rod 423 is fixedly mounted between the two connecting grooves 422. The two ends of the two-way push rod 423 are respectively fixedly connected to the side walls of the fixed block 411, and the fixed blocks 411 on both sides can be pushed outward at the same time through the two-way push rod 423.

[0037] Specifically, when installing the solar cell, the two side connection ends of the solar cell can be pulled out first and slide downward along the card slot 412 respectively. When sliding downward, the connection ends push the card blocks 414 on both sides of the card slot 412 into the slide slot 413, so that the card blocks 414 on both sides slide into the slide slot 413. When moving downward to the maximum movable distance, the connection ends between the card blocks 414 on both sides can be automatically clamped and fixed under the action of the springs 415 on both sides. When power-on detection is required, the fixed block 411 can be pushed to both sides at the same time by starting the two-way push rod 423. When the fixed block 411 moves to both sides, it drives the connection end clamped at its upper end to slide into the socket 61 for connection. The device is convenient for fixing and clamping the two connection ends of the solar cell through the setting of the limit assembly 41, and during the test process, the connection ends of the solar cells on both sides can be moved and inserted into the power supply for power-on for testing by starting the two-way push rod 423, and the control is flexible.

[0038] In order to solve the technical problem that the test results of the solar cells after detection cannot be displayed intuitively, such as Figure 7 - Fig.12As shown, the following preferred technical scheme is provided: the power-on test component 6 includes a socket 61 fixedly mounted on the side wall of the power-on detection chamber 12, a battery cell 62 is fixedly mounted on the inner wall of the socket 61, a movable tube 63 is slidably mounted 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, a mounting groove 13 is provided on the inner side of the socket 61, a spring 2 64 is fixedly mounted between the side wall of the movable tube 63 and the inner wall of the mounting groove 13, when the connecting end of the solar cell is inserted into the socket 61, the connecting end and the battery cell 62 are in contact and energized, during the insertion process, the movable tube 63 will be pushed toward the inside of the socket 61, and the spring 2 64 can reset the movable tube 63 after the activity.

[0039] An end plate 1 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 installation groove 13, a conductive plate 67 is rotatably installed on the fixing rod 66, a spring 3 69 is fixedly installed between the upper end side wall of the conductive plate 67 and the inner wall of the installation groove 13, an end plate 2 68 is fixedly installed on the upper end side wall of the installation groove 13, in the initial state, power is connected between the end plate 2 68 and the conductive plate 67, when the connecting end of the battery cell is inserted, the end plate 1 65 contacts the conductive plate 67 to form a closed loop, and the clamping force provided by the two springs 1 415 for the solar cell is greater than the elastic force of the spring 3 69 on the conductive plate 67.

[0040] The marking assembly 7 includes a mounting plate 71 fixedly mounted on the side wall of the power-on detection chamber 12, a motor 72 fixedly mounted on the lower end of the mounting plate 71, a rotating rod 73 fixedly mounted on the output end of the motor 72, a connecting block 74 fixedly mounted on the side wall of the rotating rod 73, a marking pen 75 slidingly connected inside the connecting block 74, a spring four 76 fixedly mounted between the side wall of the marking pen 75 and the inner wall of the connecting block 74, and when the marking pen 75 is driven to rotate by the motor 72, the spring four 76 can be pushed out farther to mark the surface of the solar cell being tested at the lower end.

[0041] An ink replenishing assembly 8 is provided at one end of the mounting plate 71, and the ink replenishing assembly 8 includes a mounting block 81 fixedly mounted at one end of the mounting plate 71, a movable groove 82 is provided at the lower end of the mounting block 81, 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, and 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 content 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 five 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 five 85 can push the slider 83 to a position where the sponge block 84 contacts the marker pen 75.

[0043] Limit rods 89 are fixedly installed on both sides of the movable block 86, and arc grooves 88 are opened on both sides of the slot 87. The limit rods 89 are slidably connected in the arc grooves 88. The limit rods 89 can prevent the movable block 86 from rotating when it moves linearly.

[0044] A control rod 1 43 and a control rod 2 44 are fixedly installed on the side wall of one end of the connecting plate 4. When the control rod 1 43 and the control rod 2 44 move, they both contact the movable block 86. When the control rod 1 43 contacts 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 of the marker 75 from directly contacting the sponge block 84 when the marker 75 rotates, causing damage to the sponge block 84 and affecting the ink filling effect.

[0045] When no test is performed, a closed circuit is formed between the conductive plate 67, the second end plate 68, and the motor 72. The circuit connected to the second end plate 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, a closed circuit is formed between the solar cell, the first end plate 65, the conductive plate 67, and the motor 72, and the motor 72 is connected in parallel between the two circuits.

[0046] Specifically, after the device completes the visual inspection, it enters the power-on inspection chamber 12, starts the lamp 121 to illuminate the solar cell for charging, and when the transmission belt 3 drives the connecting plate 4 to the position where the connecting ends at both ends of the solar cell are facing the socket 61, the connecting end can be inserted into the socket 61 through the two-way push rod 423 in the movable component 42. During the insertion process, the connecting end contacts the battery cell 62 and the power is turned on. 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 moving. When the movable block 86 moves, it drives the slider 83 and the sponge block 84 to slide along the movable slot 82 away from the marker 75. At this time, the conductive plate 67 is in contact with the end plate 65, the connecting end of the solar cell and the motor 72. The power supply is connected during the operation, and the current generated by the solar cell can start the motor 72 to drive the marking pen 75 to rotate and mark the surface of the solar cell. The motor 72 can only rotate once according to the program setting during one power-on process, and can drive the marking pen 75 to rotate one circle and return to its original position. When the test of the light-electricity conversion of the solar cell is completed, the two connecting ends of the solar cell can be pulled back to their original positions by the two-way push rod 423, and the solar cell can be driven to move again by the transmission belt 3. During the movement, the control rod 1 43 first slides away from the lower end of the movable block 86, and the movable block 86 moves to the end along the arc groove 88, and the spring 5 85 can automatically push the slider 83 back to its original position, and then the control rod 2 44 repeats the above steps again to push the movable block 86 to slide along the arc groove 88. There is no movement pause in this process, and the control rod 2 44 can directly disengage the control of the movable block 86 during the movement to make it automatically return to its original position. The device has four different marking situations when in use:

[0047] First, when the internal circuit of the solar cell and the internal circuit between the end plate 2 68 can be used normally, after passing through the control rod 1 43 and the control rod 2 44, two front and back marks will be generated on the solar cell;

[0048] Second, when the circuit in the solar cell is normal but the circuit connected to the second end plate 68 is faulty, only a mark will be produced at the front end of the solar cell;

[0049] Third, when the circuit in the solar cell fails and shorts out, but the circuit connected to the second end plate 68 is normally connected, only a mark will be produced at the rear end of the solar cell;

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

[0051] Through four different marks, the tested cells can be classified, and when damage occurs inside the device, it can be displayed, so that the machine can be repaired as soon as possible after discovery, which is convenient for the detection of solar cells.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

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

Claims

1. A solar cell testing device, comprising a test box (1) and support frames (2) fixedly mounted on both sides of the test box (1), a transmission belt (3) being sleeved between the two support frames (2), the transmission belt (3) being inserted into the interior of the test box (1), and a control panel (5) being fixedly mounted on the outer side wall of the test box (1), characterized in that: A connecting plate (4) is fixedly arranged on the transmission belt (3), and both sides of the upper end of the connecting plate (4) are provided with limit assemblies (41), and a movable assembly (42) is commonly arranged between the two limit assemblies (41), and a fixing plate (45) is commonly fixedly installed between the two ends of the connecting plate (4) and the transmission belt (3). A visual detection chamber (11) and a power-on detection chamber (12) are respectively opened on both sides of the interior of the test box (1), and a visual detection probe (111) is fixedly installed on the inner wall of the upper end of the visual detection chamber (11), and a plurality of lamp tubes (121) are fixedly installed on the inner wall of the upper end of the power-on detection chamber (12) at equal intervals, and a power-on test assembly (6) and a marking assembly (7) are respectively arranged on the inner wall of the power-on detection chamber (12).

2. A solar cell testing device according to claim 1, characterized in that: The limiting assembly (41) comprises a fixing block (411) fixedly mounted on both sides of the upper end of the connecting plate (4); a clamping groove (412) is provided on the fixing block (411); both inner walls of the clamping groove (412) are provided with a sliding groove (413); a fixing block (414) is slidably mounted in the sliding grooves (413) on both sides; a spring (415) is fixedly mounted between the inner wall of the fixing block (414) and the inner wall of the sliding groove (413); and the upper side edges of the fixing block (414) are arc-shaped surfaces.

3. A solar cell testing device according to claim 2, characterized in that: The movable component (42) comprises a shell (421) fixedly mounted on the connecting plate (4), connecting grooves (422) are provided on both sides of the shell (421), a bidirectional push rod (423) is fixedly mounted between the two connecting grooves (422), and both ends of the bidirectional push rod (423) are respectively fixedly connected to the side walls of the fixed block (411).

4. A solar cell testing device according to claim 1, characterized in that: The power-on test assembly (6) comprises a socket (61) fixedly mounted on the side wall of the power-on detection chamber (12); a battery cell (62) is fixedly mounted on the inner wall of the socket (61); a movable tube (63) is slidably mounted 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); a mounting groove (13) is provided on the inner side of the socket (61); and a second spring (64) is fixedly mounted between the side wall of the movable tube (63) and the inner wall of the mounting groove (13).

5. A solar cell testing device according to claim 4, characterized in that: An end plate 1 (65) is fixedly mounted on one end of the movable tube (63); a fixing rod (66) is fixedly mounted between the inner walls of both sides of the mounting groove (13); a conductive plate (67) is rotatably mounted on the fixing rod (66); a spring 3 (69) is fixedly mounted between the upper side wall of the conductive plate (67) and the inner wall of the mounting groove (13); and an end plate 2 (68) is fixedly mounted on the upper side wall of the mounting groove (13).

6. A solar cell testing device according to claim 1, characterized in that: The marking assembly (7) comprises a mounting plate (71) fixedly mounted on the side wall of the power-on detection chamber (12); a motor (72) is fixedly mounted on the lower end of the mounting plate (71); a rotating rod (73) is fixedly mounted on the output end of the motor (72); a connecting block (74) is fixedly mounted on the side wall of the rotating rod (73); a marking pen (75) is slidably connected inside the connecting block (74); and a spring (76) is fixedly mounted between the side wall of the marking pen (75) and the inner wall of the connecting block (74).

7. A solar cell testing device according to claim 6, characterized in that: An ink replenishing assembly (8) is arranged at one end of the mounting plate (71), and the ink replenishing assembly (8) comprises a mounting block (81) fixedly mounted at one end of the mounting plate (71), a movable groove (82) is provided at the lower end of the mounting block (81), a sliding block (83) is slidably connected inside the movable groove (82), a sponge block (84) is fixedly mounted on the sliding block (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: A spring five (85) is fixedly mounted on the inner wall of the movable groove (82) and the side wall of the slider (83); a slot (87) is formed at the lower end of the mounting block (81); a movable block (86) is rotatably mounted at the lower end of the slider (83); 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), arc grooves (88) are opened on both sides of the slot (87), and the limiting rods (89) are slidably connected in the arc grooves (88).

10. A solar cell testing device according to claim 9, characterized in that: A control rod 1 (43) and a control rod 2 (44) are respectively fixedly mounted on the side wall at one end of the connecting plate (4), and the control rod 1 (43) and the control rod 2 (44) are in contact with the movable block (86) when they move.

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