Photovoltaic film performance detection equipment

Abstract

The invention relates to the technical field of photovoltaic film detection, in particular to photovoltaic film performance detection equipment which comprises a spectrophotometer with an integrating sphere accessory, the integrating sphere accessory is mounted in a sample bin of the spectrophotometer, and a mounting mechanism and a wrinkle generator are further mounted in the sample bin. The wrinkle generator comprises a jacking head for applying local mechanical pressure to the photovoltaic film and an L-shaped jacking rod for applying non-uniform mechanical tension, the wrinkle generator further comprises a transmission part, and the jacking head and the L-shaped jacking rod alternately extend out in the front-back direction under the transmission action of the transmission part so that different wrinkles can be generated on the surface of the photovoltaic film; the light transmittance of the photovoltaic film with different inclination degrees and different wrinkle conditions is detected through the spectrophotometer with the integrating sphere accessory, the method is more suitable for the actual use state of the photovoltaic film, the detection result is more accurate, and more reliable basis is provided for performance evaluation of the photovoltaic film.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic film detection, and in particular to a photovoltaic film performance detection device. Background Art

[0002] Photovoltaic film is a type of functional thin film material specially used for the encapsulation of solar photovoltaic modules. Its main function is to bond the battery cells, glass and backboard into an integral structure, while providing moisture-proof, UV-resistant and mechanical protection. It mainly includes EVA, POE and other film types, which have high transparency, strong adhesion and weather resistance.

[0003] When testing the performance of photovoltaic films, transmittance is one of the core performance indicators. Currently, when using a spectrophotometer to test the transmittance of photovoltaic films, the films are usually tested at a fixed angle and standard flatness. The transmittance directly affects the efficiency of photovoltaic cells in absorbing sunlight. However, when photovoltaic modules are used outdoors, the angle of sunlight not only changes over time, but some photovoltaic modules themselves also adjust their tilt angle, causing the angle of light to change, which in turn affects the transmittance of the photovoltaic film.

[0004] In addition, when photovoltaic modules are used outdoors, the film surface may wrinkle due to temperature changes, mechanical stress or installation angle, and wrinkles will also affect the transmittance of the photovoltaic film. Currently, there is a lack of detection and analysis of the impact of wrinkles on the transmittance of photovoltaic films. Summary of the Invention

[0005] The present invention provides a photovoltaic film performance testing device to solve the problem in the related art that there is a lack of information on the influence of the inclination angle and wrinkle degree of the photovoltaic film on its transmittance.

[0006] The present invention provides a photovoltaic film performance testing device, including a spectrophotometer with an integrating sphere accessory, the integrating sphere accessory being installed in a sample chamber of the spectrophotometer, and a mounting mechanism being also installed in the sample chamber, the mounting mechanism including a moving block sliding in a front-to-rear direction, a rotating frame rotatably mounted on the top of the moving block, and two sample mounting assemblies fixedly mounted on the rotating frame and distributed vertically.

[0007] The sample mounting assembly includes a connecting frame fixed to the outer wall of the rotating frame, a circular tube fixed to the end of the connecting frame, a clamping part arranged on the circular tube for clamping the photovoltaic film sample, and a driving member for driving the photovoltaic film sample to tilt.

[0008] When testing the transmittance of a photovoltaic film sample, the sample mounting assembly is precisely positioned in front of the sample port of the integrating sphere accessory, with the center of the photovoltaic film sample facing the entrance light spot of the integrating sphere accessory.

[0009] A wrinkle generator is also installed in the sample chamber. The wrinkle generator includes a top pressure head for applying local mechanical pressure to the photovoltaic film and an L-shaped top rod for applying non-uniform mechanical tension. The wrinkle generator also includes a transmission part. The top pressure head and the L-shaped top rod are alternately extended in the front and back directions under the transmission action of the transmission part to produce different wrinkles on the surface of the photovoltaic film. The transmittance of photovoltaic films with different degrees of inclination and different wrinkle conditions is tested by a spectrophotometer with an integrating sphere accessory.

[0010] In one possible implementation, the clamping portion includes two L-shaped clamping rods distributed at both ends of the circular tube, the horizontal sections of the two L-shaped clamping rods are fixed with rectangular plates, and the rectangular plates are slidably inserted into the circular tube, and a retractable rotating shaft is rotatably connected between the two L-shaped clamping rods. A locking member for fixing the rotation angle of the rotating shaft is provided on the circular tube, and the clamping portion also includes a rotating bar fixedly mounted on both ends of the rotating shaft. When the rotating bar is rotated to a vertical state, the photovoltaic film sample can be clamped between the rotating bar and the vertical section of the L-shaped clamping rod.

[0011] In one possible implementation, a plurality of circular holes are provided on the side wall of the rotating bar and are distributed sequentially from top to bottom. A piston member is slidably arranged in the circular hole. The piston rod of the piston member extends out of the circular hole, and a connecting rod is fixed to the ends of the plurality of piston rods. The length of the piston rod is greater than the depth of the circular hole.

[0012] In one possible implementation, the piston of the piston member is composed of a magnet fixed at the center of the piston rod and a rubber ring wrapped around the outside of the magnet. The rubber ring is in close contact with the inner wall of the circular hole. Pressing the connecting rod causes the piston rod to drive the piston out of the circular hole opening. The magnet and the L-shaped clamping rod fit together and adsorb to clamp the photovoltaic film sample.

[0013] In a possible implementation, the rotating shaft includes a spline shaft rotatably mounted at a corner of the L-shaped clamp rod and a spline tube disposed between the two spline shafts, wherein the spline tube is in sliding engagement with the splines at the ends of the spline shafts.

[0014] In one possible implementation, the locking member includes a positioning seat fixed to the top end of the circular tube, the upper surface of the positioning seat is an arc surface, and a plurality of spring pins are provided on the arc surface. The plurality of spring pins are evenly distributed along the circumference and axial directions of the arc surface. A plurality of positioning holes evenly distributed along the circumference and axial directions are provided on the circumferential surface of the spline tube, and all the spring pins are elastically inserted into the corresponding positioning holes to fix the angle of the spline tube.

[0015] In one possible implementation, the driving member is used to drive the rotating shaft to rotate, and the driving member includes an electric push rod fixed at the outlet of the sample chamber and a rack 1 fixed at the top of the electric push rod. A gear 1 is fixedly sleeved on one of the spline shafts in each sample mounting assembly, and the gear 1 is engaged with the rack 1 at the top of the electric push rod for transmission.

[0016] In one possible implementation, the transmission part includes two brackets fixed to the inner wall of the rear end of the sample chamber of the spectrophotometer and a rotating shaft rotatably connected between the brackets, the end of the rotating shaft passes through the corresponding bracket and is fixedly connected to a gear three, the middle part of the rotating shaft is fixedly sleeved with a gear two, and a rack two is engaged below the gear two. An electric telescopic rod is connected between the rack two and the inner wall of the rear end of the sample chamber, the top pressure head is fixed to the front end of the rack two, and the top of the gear three is engaged with the rack three. The top of the rack three is provided with a guide rail for limiting its sliding position, and the guide rail is fixed to the inner wall of the sample chamber. The front end of the rack three is integrally formed with an L-shaped push rod, one of the L-shaped push rods is narrower, and the horizontal section of the other L-shaped push rod is integrally formed with a wedge.

[0017] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: the present invention uses a spectrophotometer with an integrating sphere accessory to detect the transmittance of photovoltaic films at different tilt angles and different degrees of wrinkling, which is more in line with the actual usage status of the photovoltaic film, and the detection results are more accurate, providing more reliable basis for the performance evaluation of the photovoltaic film.

[0018] Secondly, two sample mounting assemblies are set up to fix two photovoltaic films for testing. When one of them is performing transmittance testing, the other can apply force to cause wrinkles in the photovoltaic film. By applying the same force to multiple photovoltaic film samples of the same specifications, the wrinkles of the photovoltaic films are made as similar as possible, thereby obtaining the law of the influence of wrinkles on transmittance.

[0019] In addition, local mechanical pressure is applied by the top pressure head in the wrinkle generator, and non-uniform mechanical tension is applied by the L-shaped top rod with a wedge block, so that different wrinkles can be generated in the photovoltaic film. The specific selection can be made according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a spectrophotometer with an integrating sphere accessory provided by an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Schematic diagram of the sample compartment cover opened (integrating sphere accessory not shown).

[0022] Figure 3 It is a three-dimensional structural diagram of the installation mechanism.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the sample mounting assembly and the rotating frame.

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the sample mount and the rotating frame from another perspective.

[0025] Figure 6 This is a partial cutaway view of the sample mounting.

[0026] Figure 7 yes Figure 6 A magnified schematic diagram of area A in the middle.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the wrinkle generator.

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of the wrinkle generator from another perspective.

[0029] In the figure: 1. spectrophotometer; 2. mounting mechanism; 3. wrinkle generator; 21. limit block; 22. guide rod; 23. moving block; 24. rotating frame; 25. sample mounting assembly; 251. connecting frame; 252. circular tube; 253. clamping part; 2531. L-shaped clamping rod; 2532. rectangular plate; 2533. spline shaft; 2534. spline tube; 2535. rotating bar; 2536. piston member; 2537. connecting rod; 2538. positioning seat; 2539. spring pin; 254. driving member; 2541. gear 1; 2542. electric push rod; 31. bracket; 32. rotating shaft; 33. gear 2; 34. gear 3; 35. rack 2; 36. top pressure head; 37. electric telescopic rod; 38. L-shaped push rod; 39. guide rail. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described below, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] See also Figure 1 、 Figure 2 and Figure 3 A photovoltaic film performance testing device includes a spectrophotometer 1 with an integrating sphere accessory, wherein the integrating sphere accessory is installed in the sample chamber of the spectrophotometer 1, and a mounting mechanism 2 and a wrinkle generator 3 are also installed in the sample chamber, the mounting mechanism 2 includes two limit blocks 21 fixed in the sample chamber, two parallel guide rods 22 are arranged between the two limit blocks 21, and a moving block 23 is slidingly arranged on the guide rods 22, and the moving block 23 can be moved laterally from the opening of the sample chamber into the sample chamber, and a rotating frame 24 is rotatably installed on the top of the moving block 23, and two sample mounting assemblies 25 distributed at ninety degrees are fixedly installed on the rotating frame 24, and the sample mounting assembly 25 is used to fix the photovoltaic film sample to be tested.

[0032] It should be noted that the integrating sphere accessory is not shown in the figure. When the transmittance of the photovoltaic film sample installed on the sample mounting assembly 25 is tested, the sample mounting assembly 25 is precisely located in front of the sample port of the integrating sphere accessory, and the center of the photovoltaic film sample is facing the entrance light spot of the integrating sphere accessory.

[0033] It should also be noted that the movement of the moving block 23 can be achieved by a micro electric push rod, an electric slider or other power structure that can achieve linear reciprocating movement, and the rotation of the rotating frame 24 can be achieved by gear transmission, worm gear or other driving mechanism that can achieve small angle rotation. This is the existing technology and will not be repeated here.

[0034] See also Figure 3 、 Figure 4 and Figure 5 The sample mounting assembly 25 includes a connecting frame 251 fixed to the outer wall of the rotating frame 24, a circular tube 252 fixed to the end of the connecting frame 251, a clamping portion 253 for clamping the photovoltaic film sample provided on the circular tube 252, and a driving member 254 for driving the photovoltaic film sample to tilt. The clamping portion 253 includes two L-shaped clamping rods 2531 distributed at both ends of the circular tube 252, and the horizontal sections of the two L-shaped clamping rods 2531 are fixed with rectangular plates 2532, and the rectangular plates 2532 are slidably inserted into the circular tube 252, and the two L-shaped clamping rods 2531 are rotatably connected with an extendable The retractable rotating shaft includes a spline shaft 2533 rotatably installed at the corner of the L-shaped clamp rod 2531 and a spline tube 2534 arranged between the two spline shafts 2533, and the spline tube 2534 is slidably matched with the spline at the end of the spline shaft 2533. The clamping portion 253 also includes a rotating bar 2535 fixedly sleeved on the spline shaft 2533, and the top of the rotating bar 2535 is flush with the top of the vertical section of the L-shaped clamp rod 2531. When the rotating bar 2535 is rotated to a vertical state, the photovoltaic film sample can be clamped between the rotating bar 2535 and the vertical section of the L-shaped clamp rod 2531.

[0035] See also Figure 5 、 Figure 6 and Figure 7, a plurality of circular holes are provided on the side wall of the rotating bar 2535, which are distributed in sequence from top to bottom, and a piston member 2536 is slidably arranged in the circular hole. The piston member 2536 includes a piston and a piston rod. The piston of the piston member 2536 is composed of a magnet fixed at the center of the piston rod and a rubber ring wrapped around the outside of the magnet. The rubber ring is in close contact with the inner wall of the circular hole. The piston rod of the piston member 2536 extends out of the circular hole, and a connecting rod 2537 is fixed to the ends of the multiple piston rods. The length of the piston rod is greater than the depth of the circular hole. When the photovoltaic film sample needs to be clamped between the rotating bar 2535 and the L-shaped clamping rod 2531, the connecting rod 2537 is pressed so that the piston rod drives the piston to move out of the circular hole opening, and the magnet fits and is adsorbed on the L-shaped clamping rod 2531.

[0036] When the connecting rod 2537 is pulled, multiple pistons move out of the circular hole synchronously. When the photovoltaic film is in contact with the rotating bar 2535, negative pressure is generated in the circular hole, causing the photovoltaic film to be adsorbed and fixed on the rotating bar 2535, making it easier for the rotating bar 2535 to drive the photovoltaic film to change its tilt angle.

[0037] It should be noted that a metal layer is provided only on the side of the L-shaped clamping rod 2531 opposite to the rotating bar 2535 so as to clamp the photovoltaic film sample with the magnet; the multi-point negative pressure adsorption is used to fix the photovoltaic film sample in order to drive the photovoltaic film sample to rotate around the spline shaft 2533 through the rotating bar 2535 to change the inclination angle of the photovoltaic film sample.

[0038] See also Figure 3 、 Figure 5 、 Figure 6 and Figure 7 The driving member 254 is used to drive the rotating shaft to rotate. The driving member 254 includes an electric push rod 2542 fixed at the outlet of the sample chamber and a rack 1 fixed at the top of the electric push rod 2542. A gear 1 2541 is fixedly sleeved on one of the spline shafts 2533 in each sample mounting assembly 25, and the gear 1 2541 is engaged with the rack 1 at the top of the electric push rod 2542 for transmission.

[0039] like Figure 3 As shown, the gear 1 2541 on the rotating shaft parallel to the guide rod 22 is close to the sample chamber opening. When the moving block 23 drives the rotating frame 24 and the sample mounting assembly 25 to move to the sample chamber opening, the gear 1 2541 will engage with the rising rack 1.

[0040] See also Figure 6 and Figure 7The clamping portion 253 also includes a locking member for fixing the rotation angle of the rotating shaft, and the locking member includes a positioning seat 2538 fixed to the top end of the circular tube 252. The upper surface of the positioning seat 2538 is an arc surface, and a plurality of spring pins 2539 are provided on the arc surface. The plurality of spring pins 2539 are evenly distributed along the circumference and axial direction of the arc surface. The circumferential surface of the spline tube 2534 is provided with a plurality of positioning holes evenly distributed along the circumference and axial direction. All spring pins 2539 are elastically inserted into the corresponding positioning holes to fix the spline tube 2534. When the driving member 254 drives the spline shaft 2533 to rotate, the spline tube 2534 rotates accordingly under the action of the spline. At this time, the spring pin 2539 is shortened by the resistance of the inner wall of the positioning hole and moves out of the positioning hole. When the spring pin 2539 corresponds to the positioning hole at the next position, it pops out and is inserted into the positioning hole again to fix the rotation angle of the spline tube 2534 and the rotating bar 2535.

[0041] In this case, the photovoltaic film sample is adsorbed and attached to the rotating bar 2535 in an inclined state, and the tilt direction changes as the angle of the rotating bar 2535 changes, simulating the transmittance of the photovoltaic film between the backboard and the solar cell in the photovoltaic module when it is irradiated with scattered light when the angle of the photovoltaic module changes.

[0042] It should be noted that when using the negative pressure adsorption method to fix the photovoltaic film sample, the rotating bar 2535 must first be slightly tilted so that the photovoltaic film can fully contact the rotating bar 2535 under the action of gravity, and then the photovoltaic film is adsorbed and attached to the rotating bar 2535 by using negative pressure.

[0043] See also Figure 2 、 Figure 8 and Figure 9The wrinkle generator 3 includes a top pressure head 36 for applying local mechanical pressure and an L-shaped top rod 38 for applying non-uniform mechanical tension. The top pressure head 36 and the L-shaped top rod 38 are alternately extended in the front and rear directions under the transmission action of the transmission part. The transmission part includes two brackets 31 fixed to the inner wall of the rear end of the sample chamber of the spectrophotometer 1 and a rotating shaft 32 rotatably connected between the brackets 31. The end of the rotating shaft 32 passes through the corresponding bracket 31 and is fixedly connected to the gear three 34. The middle part of the rotating shaft 32 is fixedly sleeved with a gear two 33. The diameter of the gear two 33 is smaller than the diameter of the gear three 34. A rack 2 35 is engaged below wheel 2 33, and an electric telescopic rod 37 is connected between rack 2 35 and the inner wall of the rear end of the sample chamber. The front end of rack 2 35 is threadedly connected or plugged with a top pressure head 36, and the top of gear 3 34 is engaged with rack 3, and the front end of rack 3 is integrally formed with an L-shaped push rod 38, one of the L-shaped push rods 38 is narrower, and the horizontal section of the other L-shaped push rod 38 is integrally formed with a wedge. The transmission part also includes two guide rails 39 fixed to the inner wall of the rear end of the sample chamber, and the position of the guide rails 39 corresponds one-to-one with rack 3, and the guide rails 39 and rack 3 slide in a limited position.

[0044] The extension and retraction of the electric telescopic rod 37 drives the rack 2 35 to move forward and backward, and then engages the gear 2 33 to rotate, and the gear 3 34 engages the rack 3 and moves in the opposite direction along the guide rail 39. When the top pressure head 36 moves forward, local pressure can be applied to the photovoltaic film that has undergone transmittance testing at different angles, causing the clamped photovoltaic film to deform and produce a wrinkle. When the top pressure head 36 moves backward, the L-shaped top rod 38 moves forward, and the slope of the wedge pushes the rotating bar 2535 and the L-shaped clamping rod 2531, so that the rectangular plate 2532 is pulled out of the circular tube 252 for a longer distance. The L-shaped top rod 38 without the wedge installed does not apply an extrusion force to the other rotating bar 2535 and the L-shaped clamping rod 2531, so that the clamped photovoltaic film is subjected to non-uniform mechanical tension, resulting in local stretching and another kind of wrinkle.

[0045] When any kind of wrinkle occurs, the other photovoltaic film that is undergoing transmittance testing at different angles has also completed testing. At this time, the rotating frame 24 can be reset to drive the two sample mounting assemblies 25 to switch positions to prepare for transmittance testing of the wrinkled photovoltaic film.

[0046] It should be noted that in order to avoid the two sample mounting assemblies 25 colliding with the integrating sphere accessory and causing damage to the integrating sphere accessory when rotating, before the rotating frame 24 rotates, the moving block 23 can drive the rotating frame 24 and the sample mounting assembly 25 to move a certain distance, so that the sample mounting assembly 25 avoids the vicinity of the integrating sphere accessory when rotating, and then the moving block 23 drives the rotating frame 24 to reset until the center of the wrinkled photovoltaic film sample is re-aligned with the entrance light spot of the integrating sphere accessory, and the sample mounting assembly 25 is precisely in front of the sample port of the integrating sphere accessory.

[0047] When it is necessary to test the transmittance of the photovoltaic film sample, first open the cover of the sample chamber, then insert the photovoltaic film from top to bottom between the rotating bar 2535 and the L-shaped clamping rod 2531, and after spreading the photovoltaic film, press the connecting rod 2537 so that the piston rod drives the piston to move out of the circular hole opening, and the magnet and the L-shaped clamping rod 2531 fit together and adsorb to clamp the photovoltaic film. Then, the moving block 23 moves to drive the sample mounting assembly 25 to move so that the center of the clamped photovoltaic film is facing the entrance light spot of the integrating sphere accessory, close the cover, turn on the spectrophotometer 1, and test the transmittance of the first photovoltaic film in the vertical state.

[0048] After the test is completed, the sample mounting assembly 25 is reset and the cover is opened. At this time, the electric push rod 2542 is used to drive the rack 1 to rise a distance and then pause. Under the meshing action of the rack 1, the gear 1 2541 drives the spline shaft 2533 to rotate, and the other spline shaft 2533 rotates synchronously under the action of the spline tube 2534. The photovoltaic film is manually pressed to fit it with the rotating bar 2535, and then the connecting rod 2537 is pulled, and multiple pistons are synchronously moved out of the circular hole. When the photovoltaic film is in contact with the rotating bar 2535, a negative pressure is generated in the circular hole, so that the photovoltaic film is adsorbed and fixed on the rotating bar 2535. The moving block 23 drives the sample mounting assembly 25 again to move to a position aligned with the integrating sphere accessory, close the cover, and turn on the spectrophotometer 1 again to test the transmittance of the first photovoltaic film at the first tilt angle.

[0049] After the test is completed, the sample mounting assembly 25 is reset, the compartment cover is opened, the rack 1 rises for the second time, and the meshing gear 1 2541 rotates a larger angle to change the tilt angle of the photovoltaic film. The moving block 23 drives the sample mounting assembly 25 to move to a position aligned with the integrating sphere accessory again, the compartment cover is closed, and the spectrophotometer 1 is turned on again to test the transmittance of the first photovoltaic film at the second tilt angle. Similarly, transmittance tests at different tilt angles are performed.

[0050] It should be noted that rack 1 needs to be reset after each rise to prevent gear 1 2541 from engaging with rack 1 when the sample mounting assembly 25 moves and resets, and the height of each rise is increased compared to the previous time, so that the photovoltaic film gradually tilts. The tilt angle of the photovoltaic film is fixed each time, which can be determined based on the angle between two adjacent positioning holes.

[0051] It should be noted that the photovoltaic film can also be rotated by the rotating frame 24 to change the tilt direction.

[0052] After the transmittance test of the first photovoltaic film at different angles is completed, the second photovoltaic film is switched to a position aligned with the integrating sphere accessory. The transmittance test process of the second photovoltaic film is the same as that of the first photovoltaic film. When the second photovoltaic film is subjected to the transmittance test at the last tilt angle, an external force is applied to the first photovoltaic film through the wrinkle generator 3 to generate wrinkles. Specifically, local external force or non-uniform mechanical tension can be applied. After that, the two sample mounting assemblies 25 are driven to switch positions by the rotating frame 24 to prepare for the transmittance test of the first wrinkled photovoltaic film. The test process and requirements are similar to the transmittance test of photovoltaic films at different angles.

[0053] It should be noted that after the first photovoltaic film is tested at different angles, it needs to be reset to a vertical clamping state to facilitate the application of external force. When no external force is applied to the photovoltaic film, the top pressure head 36 and the L-shaped top rod 38 are at a certain distance from the sample mounting assembly 25.

[0054] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0055] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections, integral or sliding connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0056] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A photovoltaic film performance testing device comprising a spectrophotometer with an integrating sphere attachment, the integrating sphere attachment being mounted in a sample compartment of the spectrophotometer, and a mounting mechanism being mounted in the sample compartment, characterized in that: The mounting mechanism includes a moving block that slides in the front-back direction, a rotating frame that is rotatably mounted on the top of the moving block, and two sample mounting assemblies that are fixedly mounted on the rotating frame and are vertically distributed. The sample mounting assembly includes a connecting frame fixed to the outer wall of the rotating frame, a round tube fixed to the end of the connecting frame, a clamping portion provided on the round tube for clamping the photovoltaic film, and a driving member for driving the photovoltaic film to tilt; When testing the transmittance of photovoltaic films, the sample mounting assembly is precisely placed in front of the sample port of the integrating sphere accessory, and the center of the photovoltaic film faces the entrance light spot of the integrating sphere accessory; A wrinkle generator is also installed in the sample chamber. The wrinkle generator includes a top pressure head for applying local mechanical pressure to the photovoltaic film and an L-shaped top rod for applying non-uniform mechanical tension. The wrinkle generator also includes a transmission part. The top pressure head and the L-shaped top rod are alternately extended in the front-to-back direction under the transmission action of the transmission part to produce different wrinkles on the surface of the photovoltaic film. The transmittance of photovoltaic films with different tilt degrees and different wrinkles was tested using a spectrophotometer with an integrating sphere accessory.

2. The photovoltaic film performance testing device according to claim 1, characterized in that: The clamping part includes two L-shaped clamping rods distributed at both ends of the circular tube, the horizontal sections of the two L-shaped clamping rods are fixed with rectangular plates, and the rectangular plates are slidably inserted into the circular tube, and a retractable rotating shaft is rotatably connected between the two L-shaped clamping rods. A locking member for fixing the rotation angle of the rotating shaft is provided on the circular tube. The clamping part also includes a rotating bar fixedly sleeved on both ends of the rotating shaft. When the rotating bar is rotated to a vertical state, the photovoltaic film can be clamped between the rotating bar and the vertical section of the L-shaped clamping rod.

3. The photovoltaic film performance testing device according to claim 2, characterized in that: The side wall of the rotating bar is provided with a plurality of circular holes distributed in sequence from top to bottom, a piston member is slidably arranged in the circular hole, a piston rod of the piston member extends out of the circular hole, and a connecting rod is fixed to the ends of the plurality of piston rods, and the length of the piston rod is greater than the depth of the circular hole.

4. The photovoltaic film performance testing device according to claim 3, characterized in that: The piston of the piston member consists of a magnet fixed at the center of the piston rod and a rubber ring wrapped around the outside of the magnet. The rubber ring is in close contact with the inner wall of the circular hole. Pressing the connecting rod causes the piston rod to drive the piston out of the circular hole opening. The magnet and the L-shaped clamping rod fit together and adsorb to clamp the photovoltaic film.

5. The photovoltaic film performance testing device according to claim 2, characterized in that: The rotating shaft comprises a spline shaft rotatably mounted at a corner of an L-shaped clamping rod and a spline tube arranged between the two spline shafts. The spline tube is slidably fitted with splines at the ends of the spline shafts.

6. The photovoltaic film performance testing device according to claim 5, characterized in that: The locking member includes a positioning seat fixed on the top end of the circular tube. The upper surface of the positioning seat is an arc surface. A plurality of spring pins are provided on the arc surface. The plurality of spring pins are evenly distributed along the circumference and axial direction of the arc surface. A plurality of positioning holes evenly distributed along the circumference and axial direction are provided on the circumferential surface of the spline tube. All the spring pins are elastically inserted into the corresponding positioning holes to fix the angle of the spline tube.

7. The photovoltaic film performance testing device according to claim 6, characterized in that: The driving member is used to drive the rotating shaft to rotate. The driving member includes an electric push rod fixed at the outlet of the sample chamber and a rack 1 fixed at the top of the electric push rod. A gear 1 is fixedly sleeved on one of the spline shafts in each sample mounting assembly, and the gear 1 is engaged with the rack 1 at the top of the electric push rod for transmission.

8. The photovoltaic film performance testing device according to claim 1, characterized in that: The transmission part includes two brackets fixed to the inner wall of the rear end of the sample chamber of the spectrophotometer and a rotating shaft rotatably connected between the brackets. The end of the rotating shaft passes through the corresponding bracket and is fixedly connected to a gear three. The middle part of the rotating shaft is fixedly sleeved with a gear two, and a rack two is engaged below the gear two. An electric telescopic rod is connected between the rack two and the inner wall of the rear end of the sample chamber. The top pressure head is fixed to the front end of the rack two, and the top of the gear three is engaged with the rack three. The top of the rack three is provided with a guide rail for limiting its sliding. The guide rail is fixed to the inner wall of the sample chamber. The front end of the rack three is integrally formed with an L-shaped push rod, one of the L-shaped push rods is narrower, and the horizontal section of the other L-shaped push rod is integrally formed with a wedge.

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