A photovoltaic module testing device

Abstract

The present invention relates to the field of testing devices, and particularly to a photovoltaic module testing device. It includes a base, a testing chamber, an adjusting and testing component, and a testing rack. The testing chamber is rotatably arranged on the base; multiple groups of adjusting and testing components are arranged along the four walls of the testing chamber. The adjusting end one adjusts the angle of a pair of photovoltaic modules and their distance from the rotation axis, the adjusting end two provides local external force, and the testing end can detect the mechanical loads on the front and back sides of the photovoltaic modules under the action of centripetal force / local external force; the testing rack simulates the outdoor environment for the photovoltaic modules from above. On the one hand, the present invention enables the photovoltaic modules to be tested under uniformly stressed conditions, and on the other hand, enables the photovoltaic modules to be tested under locally stressed conditions. Combined with environmental simulation, it enriches the test content and data, meets the test requirements of photovoltaic modules under different conditions, and has strong automation, accuracy, flexibility, and batchability during the test process.

Description

Technical Field

[0001] The invention relates to the field of testing devices, and in particular to a photovoltaic component testing device. Background Art

[0002] Mechanical load testing is a very important test for photovoltaic modules. It is designed to simulate the mechanical loads that the modules are subjected to when used outdoors to evaluate their structural integrity and performance. It includes static and dynamic tests. Static mechanical load testing is mainly used to evaluate the performance and stability of photovoltaic modules under fixed loads. Dynamic mechanical load testing simulates the dynamic load conditions that photovoltaic modules may encounter in actual use to evaluate their performance and durability. These tests provide photovoltaic module manufacturers with important data support on product performance, stability and reliability, thereby ensuring that photovoltaic modules can operate efficiently and stably in actual applications.

[0003] The Chinese patent document with authorization announcement number CN218823141U provides a photovoltaic module mechanical load testing device, including a support member and a connecting member, wherein the connecting member extends outward around the side wall of the support member, the support member is provided with a rotation axis, and the connecting member can rotate around the rotation axis; the connecting member is provided with a mounting position, and the mounting position is used to install the photovoltaic module, and the surface of the photovoltaic module can be arranged parallel to the rotation axis so that the photovoltaic module rotates around the rotation axis and generates a centripetal force acting on the surface of the photovoltaic module.

[0004] The above photovoltaic module mechanical load test device has the following deficiencies: 1. Single detection mode: The photovoltaic module has a fixed position and angle, and can only perform static mechanical load mechanical testing at a single angle, resulting in insufficient test data and low reference value. 2. The detection environment is inconsistent with the actual installation environment: photovoltaic modules are generally installed outdoors, and the actual working angle and working environment are not unified. These factors will affect their actual mechanical load performance, and ultimately lead to errors in the test results.

[0005] In view of the problems existing in the background technology, a photovoltaic module testing device is proposed. On the one hand, the photovoltaic module can be tested under uniform stress, and on the other hand, the photovoltaic module can be tested under local stress. Combined with environmental simulation, the test content and data are enriched to meet the testing needs of photovoltaic modules in different situations. The testing process is highly automatic, accurate, flexible and batch-oriented.

[0006] The present invention provides a photovoltaic module testing device, which includes a base, a testing box, an adjusting and testing component, and a testing rack. The testing box is rotatably arranged on the base and provides a centripetal force with controllable magnitude through rotation around the origin; multiple groups of adjusting and testing components are arranged along the four walls of the testing box. The adjusting end one adjusts the angle of a pair of photovoltaic modules and their distance from the rotation axis, and the adjusting end two provides a local external force. The testing end can detect the mechanical loads on the front and back sides of the photovoltaic module under the action of the centripetal force / local external force; the bottom of the testing rack is connected to the base, and the top penetrates through the testing box to simulate the outdoor environment for the photovoltaic module from above.

[0007] Preferably, the adjusting and testing component includes a mounting seat located inside the testing box; a rotating cylinder rotatably penetrates through the testing box through a driving structure on the mounting seat, and an adjusting rod one is arranged at its outer end; a mounting frame is arranged in front of the rotating cylinder, and its four sides are respectively rotatably connected to the adjusting rod one, and the angle and the distance from the rotation axis are adjusted through it; an adjusting and testing piece is arranged inside the mounting frame; a local testing piece is arranged on the mounting seat.

[0008] Preferably, the adjusting and testing piece includes a limiting frame rotatably arranged inside the mounting frame and a tester located on the limiting frame; the photovoltaic module is mounted on the limiting frame and its mechanical load is detected by the tester.

[0009] Preferably, the limiting frame is of a frame structure, two opposite sides are rotatably connected to the inner wall of the mounting frame, and the other two opposite sides are provided with slots for the photovoltaic module to enter and exit; a detachable limiting piece is arranged on the slots to limit the photovoltaic module; pairs of clamping plates are arranged on the four sides of the limiting frame; after the photovoltaic module enters the limiting frame through the slot, it is clamped between the pairs of clamping plates and then limited by the limiting piece.

[0010] Preferably, a flexible protective piece with holes is arranged between the clamping plates on the same side. While protecting the photovoltaic module, it allows the wires of the tester to penetrate through and connect to the testing end on the photovoltaic module.

[0011] Preferably, the local testing piece includes a translation driving piece that penetrates through the rotating cylinder and is connected to the mounting seat; the translation end of the translation driving piece is rotatably connected to the chassis through an adapter; the chassis is rotatably connected to a local testing disc; a force application platform is movably arranged in front of the local testing disc, and the local force application intensity is increased through vibration and the setting of protrusions; the rotation directions of the chassis and the local testing disc are staggered.

[0012] Preferably, the testing rack includes a pillar that rotatably penetrates through the testing box; an environmental simulation piece is connected to the outer periphery of the pillar through a mounting rod.

[0013] Preferably, the environmental simulation piece is an illumination piece for simulating light.

[0014] Preferably, the environmental simulation piece is a spraying piece for simulating rainy days.

[0015] Preferably, the environmental simulation piece is a temperature adjusting piece for temperature.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: By setting up the adjustment test component, on the one hand, through the movement, rotation of the installation frame and the rotation of the limit frame, the actual installation angle of the photovoltaic module and other angles are simulated, and combined with the centripetal force, the photovoltaic module can be tested in multiple modes such as double-sided testing, multi-angle testing, dynamic testing, and static testing under uniform stress. The mechanical load testing has flexibility, diversity, rich and comprehensive data, which is convenient for accurately judging the quality of the photovoltaic module. On the other hand, by making the local test plate close to the photovoltaic module and the force application platform fit on the photovoltaic module, force is applied locally to the photovoltaic module, so that the photovoltaic module can be tested in multiple modes such as double-sided testing, multi-angle testing, dynamic testing, and static testing under local stress. The above-mentioned testing modes of uniform stress and local stress can be completed separately or synchronously. In addition, the present invention simulates light / rain / temperature to make the test environment of the photovoltaic module fit the outdoor working environment, further enriching the test content and data, meeting the test requirements of the photovoltaic module under different conditions, and the test process has strong automation, accuracy, flexibility, and batchability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the photovoltaic module testing device in the present invention (viewpoint one);

[0018] Figure 2 is a schematic structural diagram of the photovoltaic module testing device in the present invention (viewpoint two);

[0019] Figure 3 is a schematic structural diagram of the adjustment test component in the present invention;

[0020] Figure 4 is a schematic structural diagram of the adjustment test piece in the present invention;

[0021] Figure 5 is a schematic structural diagram of the local test piece in the present invention;

[0022] Figure 6 is Figure 5 an enlarged view of part A in

[0023] Figure 7 is a schematic exploded view of the photovoltaic module testing device in the present invention;

[0024] Figure 8 is Figure 7 an enlarged schematic view of part B in

[0025] Figure 9 is a schematic structural diagram of the test rack in the present invention.

[0026] Reference numerals: 1, base; 101, motor three; 2, test box; 201, first gear; 202, second gear; 3, adjustment and test assembly; 301, mounting seat; 302, worm; 303, worm gear; 304, rotating cylinder; 305, first adjusting rod; 306, mounting frame; 307, local test piece; 307a, translation driving member; 307b, connecting head; 307c, chassis; 307d, local test plate; 307e, force application platform; 307f, vibrator; 307g, explosion-proof ring; 307h, spring; 307i, strengthening bump; 308, adjustment and test piece; 308a, limiting frame; 308b, slotted opening; 308c, limiting member; 308d, clamping plate; 308e, flexible protection piece; 308f, tester; 309, motor two; 4, test rack; 401, support pillar; 402, mounting rod; 403, environmental simulation piece. Detailed implementation manners

[0027] Example 1, as Figures 1 - 2 shown, a photovoltaic module testing device proposed by the present invention includes a base 1, a test box 2, an adjustment and test assembly 3, and a test rack 4. The test box 2 is rotatably arranged on the base 1 and provides a centripetal force with controllable magnitude through rotation around the origin; multiple groups of the adjustment and test assemblies 3 are arranged along the four walls of the test box 2. The first adjustment end adjusts the angle of the photovoltaic module and its distance from the rotation axis, and the second adjustment end provides a local external force. The test end can detect the mechanical loads on the front and back sides of the photovoltaic module under the action of the centripetal force / local external force; the bottom of the test rack 4 is connected to the base 1, and the top penetrates through the test box 2 to simulate the outdoor environment for the photovoltaic module from above.

[0028] As Figure 3 shown, the adjustment and test assembly 3 includes a mounting seat 301 located inside the test box 2; the rotating cylinder 304 rotates through the test box 2 through a driving structure on the mounting seat 301, and the first adjusting rod 305 is arranged at its outer end; the mounting frame 306 is arranged in front of the rotating cylinder 304, and the four sides are respectively rotatably connected to the first adjusting rod 305 and adjust the angle and the distance from the rotation axis through it. The adjustment and test piece 308 is arranged inside the mounting frame 306 and forms the first adjustment end in combination with the first adjusting rod 305, the mounting frame 306, and the rotating cylinder 304; the local test piece 307 is arranged on the mounting seat 301, which is the second adjustment end.

[0029] It should be further noted that the driving structure is a structure of a worm gear 303 and a worm 302 that cooperate with each other. The worm 302 is driven by a first motor and is rotatably connected to the mounting seat 301; the worm gear 303 is sleeved on the rotating cylinder 304 to drive the rotating cylinder 304 to rotate self.

[0030] The first adjusting rod 305 is provided with four groups corresponding to the four sides of the installation frame 306 one by one, all of which are cylinder structures. By synchronously moving the telescopic ends, the distance between the photovoltaic module and the rotating shaft can be adjusted. Based on the formula: , it can be known that adjusting the distance between the photovoltaic module and the rotating shaft can change the magnitude of the centripetal force. By moving the telescopic ends out of sync, the angle of the photovoltaic module can be adjusted. The angle of the photovoltaic module can be set to the actual installation angle or other angles. Finally, the test conditions are changed through the above settings to meet the test requirements.

[0031] As Figure 4 shown, the adjusting test piece 308 includes a limiting frame 308a rotatably arranged in the installation frame 306 and a tester 308f located on the limiting frame 308a.

[0032] The photovoltaic module is installed on the limiting frame 308a and is detected for mechanical load by the tester 308f. By rotating the limiting frame 308a, the flexibility of the angle adjustment of the photovoltaic module is further increased, realizing double-sided testing, multi-angle testing, dynamic testing, static testing, etc. The mechanical load testing modes are diversified to better simulate the installation environment.

[0033] It should be further noted that the limiting frame 308a is a frame structure. Two opposite sides are rotationally connected to the inner wall of the installation frame 306 by driving with a second motor 309, and the other two opposite sides are provided with slots 308b for the photovoltaic module to enter and exit; a detachable limiting member 308c is arranged on the slots 308b to limit the photovoltaic module; paired clamping plates 308d are arranged on the four sides of the limiting frame 308a; after the photovoltaic module enters the limiting frame 308a through the slots 308b, it is clamped between the paired clamping plates 308d, and then limited by the limiting member 308c.

[0034] It should be further noted that the limiting member 308c is a combination of a bolt and a nut. The bolt penetrates through the two side walls of the slot 308b, and then the nut is tightened to prevent the photovoltaic module from sliding out of the slot 308b during testing.

[0035] It should be further noted that a flexible protective member 308e with holes is arranged between the clamping plates 308d on the same side. While protecting the photovoltaic module, it allows the wires of the tester 308f to penetrate through and connect to the test ends on the photovoltaic module, and the flexible structure will not interfere with the test results of the mechanical load.

[0036] It should be further noted that the flexible protective member 308e is a nylon mesh, which does not affect the force on the photovoltaic module and has a certain protective value.

[0037] It should be further noted that the tester 308f is a stress detector. By attaching stress detection sheets to the front and back surfaces of the photovoltaic module, the purpose of synchronous testing can be achieved, and the flexible protection member 308e can prevent the stress detection sheets from being thrown out.

[0038] As Figure 5 shown, the local test piece 307 includes a translation driving member 307a that penetrates through the rotating cylinder 304 to connect the mounting base 301; the translation end of the translation driving member 307a is rotatably connected to the chassis 307c through an adapter 307b; the chassis 307c is rotatably connected to the local test plate 307d; the force application platform 307e is movably arranged in front of the local test plate 307d, and the local force application intensity is increased by vibration and the setting of protrusions.

[0039] It should be further noted that the translation driving member 307a is of a cylinder structure.

[0040] It should be further noted that the rotation directions of the chassis 307c and the local test plate 307d are staggered, specifically, they can be perpendicular to each other.

[0041] By driving with a cylinder, the local test plate 307d can be controlled to enter and exit the rotating cylinder 304. When local force application is required, the local test plate 307d approaches the photovoltaic module, and through the movable settings of the chassis 307c and the local test plate 307d, the force application platform 307e is attached to the photovoltaic module, making the local force application more balanced and stable, which is convenient for testing;

[0042] It should be further noted that as Figures 5 - 6 shown, a vibrator 307f is arranged inside the local test plate 307d; an explosion-proof ring 307g with a position higher than the vibrator 307f is arranged on the outer periphery of the vibrator 307f; a spring 307h is arranged between the explosion-proof ring 307g and the force application platform 307e to increase the vibration amplitude of the force application platform 307e.

[0043] It should be further noted that reinforcing bumps 307i are evenly arranged on the surface of the force application platform 307e to further attach to the photovoltaic module to enhance the force application effect.

[0044] As Figures 7 - 8 shown, an installation groove is arranged on the base 1; a first gear 201 and a second gear 202 that mesh with each other are arranged in the installation groove; the second gear 202 is driven to rotate by a motor three 101; the first gear 201 is arranged at the bottom of the test box 2 and is coaxial with its rotating shaft.

[0045] As Figure 9 shown, the test rack 4 includes a support column 401 that rotates through the test box 2 and whose bottom passes through the first gear 201 and extends into the installation groove; the outer periphery of the support column 401 is connected to the environmental simulation member 403 through a mounting rod 402.

[0046] It should be further noted that the environmental simulation component 403 is a lighting component for simulating light, such as xenon lamps, mercury lamps, LED lamps, etc. The environmental simulation component 403 can also be a spraying component for simulating rainy days, such as sprinkler heads, water guns, etc. The environmental simulation component 403 can also be a temperature regulating component for temperature, such as a heater, a cooler, etc.

[0047] By simulating light / rainy days / temperature, the outdoor working environment of the photovoltaic module can be simulated, and its mechanical load performance under different environments can be tested, further enriching the test data and improving the test effect.

[0048] Embodiment 2: Based on the photovoltaic module testing device in Embodiment 1, this embodiment proposes a photovoltaic module testing method, and the steps are as follows:

[0049] S1. After the photovoltaic modules to be processed enter the corresponding limiting frames 308a one by one through the slots 308b, they are clamped between the paired clamping plates 308d, and then limited by the limiting members 308c;

[0050] S2. Simulate light / rainy days / temperature to make the test environment of the photovoltaic module conform to the outdoor working environment;

[0051] S3. Rotate the rotating cylinder 304 and extend and retract the first adjusting rod 305 to drive the installation frame 306 to rotate; rotate the limiting frame 308a to simulate the actual installation angle of the photovoltaic module;

[0052] S4. The test chamber 2 rotates from the origin, and a centripetal force is generated during the rotation process. This centripetal force acts on the photovoltaic module, and the mechanical load test starts, including double-sided test, multi-angle test, dynamic test, static test, etc.;

[0053] S5. When performing the static test, it is necessary to refer to standards such as IEC 61215 and IEC 61646, and gradually apply a load on the front surface and the back surface of the photovoltaic module until 2400 Pa is reached, and ensure that the load is evenly distributed; maintain the load for 1 hour; when performing the dynamic test, refer to the IEC 62782 standard, maintain the photovoltaic module dynamically, and apply a dynamic mechanical load of ±1000 Pa; cycle and load 1000 times, complete 1-3 cycles per minute, and maintain at least 7±3 seconds under the ultimate pressure;

[0054] S6. When local testing is required, the local test plate 307d approaches the photovoltaic module, and the force application platform 307e fits on the photovoltaic module to apply local force to it and test the local mechanical load;

[0055] S7. After completing the batch testing of the photovoltaic modules, read the stress data at the corresponding positions respectively, and check whether the modules have intermittent open circuit phenomena, serious appearance defects, etc.;

[0056] S8. Evaluate the mechanical load performance of the photovoltaic module.

[0057] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge of those skilled in the art.

Claims

1. A photovoltaic module testing device, characterized in that: include: The test box (2) is rotatably mounted on the base (1) and provides a centripetal force of controllable magnitude by rotating at an origin; Adjust the test assembly (3), set multiple groups along the four walls of the test box (2), and the test end can detect the mechanical load on the front and back sides of the photovoltaic assembly under the action of centripetal force / local external force; and a test frame (4), the bottom of which is connected to the base (1) and the top of which passes through the test box (2), so as to simulate the outdoor environment of the photovoltaic module from above; The adjustment test assembly (3) comprises a mounting seat (301) located in the test box (2); a rotating cylinder (304) is rotated through the test box (2) by a driving structure on the mounting seat (301), and an adjustment rod (305) is arranged at the outer end of the rotating cylinder (304); a mounting frame (306) is arranged in front of the rotating cylinder (304), and four sides are respectively rotatably connected to the adjustment rod (305), and the angle and the distance from the rotating axis are adjusted by the adjustment rod; the adjustment test piece (308) is arranged in the mounting frame (306); and the local test piece (307) is arranged on the mounting seat (301); The adjustment test piece (308) comprises a limit frame (308a) rotatably arranged in the installation frame (306) and a tester (308f) located on the limit frame (308a); the photovoltaic component is installed on the limit frame (308a), and the mechanical load is detected by the tester (308f); The limiting frame (308a) is a frame structure, two opposite sides of which are rotatably connected to the inner wall of the installation frame (306), and the other two opposite sides are provided with slots (308b) for the photovoltaic components to enter and exit; a detachable limiting member (308c) is provided on the slot (308b) to limit the photovoltaic components; pairs of clamping plates (308d) are provided on the four sides of the limiting frame (308a); after the photovoltaic components enter the limiting frame (308a) through the slot (308b), they are clamped between the pairs of clamping plates (308d) and then limited by the limiting member (308c); The local test piece (307) comprises a translation driving member (307a) penetrating the rotating cylinder (304) and connected to the mounting seat (301); the translation end of the translation driving member (307a) is rotationally connected to the chassis (307c) via a connector (307b); the chassis (307c) is rotationally connected to the local test disc (307d); the force application platform (307e) is movably arranged in front of the local test disc (307d) and increases the local force application strength by vibration and the provision of protrusions; the rotation directions of the chassis (307c) and the local test disc (307d) are staggered; The test stand (4) comprises a support (401) which rotates and penetrates the test box (2); the outer periphery of the support (401) is connected to the environmental simulation component (403) via a mounting rod (402).

2. The photovoltaic module testing device according to claim 1, characterized in that: A flexible protective member (308e) with holes is provided between the card plates (308d) on the same side, which protects the photovoltaic components and allows the wires of the tester (308f) to pass through and connect to the test terminals on the photovoltaic components.

3. The photovoltaic module testing device according to claim 1, characterized in that: The environment simulation component (403) is a lighting component used to simulate lighting.

4. The photovoltaic module testing device according to claim 1, characterized in that: The environmental simulation part (403) is a spray part used to simulate rainy days.

5. The photovoltaic module testing device according to claim 1, characterized in that: The environmental simulation component (403) is a temperature regulating component for temperature.

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