Photovoltaic module double-sided rate test system

Abstract

The utility model belongs to the field of photovoltaic module manufacturing, and particularly relates to a photovoltaic module double-sided rate testing system. Comprising a test light source, a double-sided rate measuring device, a photovoltaic module installation frame and a reflector installation support, the test light source is installed above the photovoltaic module installation frame, the photovoltaic module installation frame is used for installing a photovoltaic module to be tested, the reflector installation support is installed below the photovoltaic module installation frame, and the photovoltaic module to be tested is installed on the reflector installation support. The double-sided rate measuring equipment is connected with a photovoltaic module to be tested, the reflector mounting bracket is used for mounting reflectors with different reflectivity according to test requirements, and the area of the reflector is larger than that of the photovoltaic module to be tested. According to the utility model, the light emitted by the test light source is reflected by the reflecting plate with a larger area, and the reflecting plates with different emission rates are replaced according to test requirements, so that different environments are simulated, and the double-sided rate of the component under different reflection conditions is simulated more truly.

Description

Technical Field

[0001] The utility model belongs to the field of photovoltaic component manufacturing, and in particular relates to a photovoltaic component bifaciality testing system. Background Art

[0002] At present, there are two indoor testing methods for the bifaciality of double-glass photovoltaic modules in the industry: 1. Double-sided lighting method, the photovoltaic module is installed on the traditional module bracket, and there is an adjustable irradiance light source at the front and back positions. The front and back sides of the module are illuminated at the same time to calculate its bifaciality. This method uses a direct light source to illuminate the back of the photovoltaic module, which cannot simulate the power generated by the reflected light received by the back of the module under real conditions. In addition, during the test, the two light sources interfere with each other, and part of the test light will enter the other side of the photovoltaic module to be tested through the reflection of the module glass and the surrounding environment, so that the other side of the photovoltaic module receives more light radiation, affecting the authenticity of the test results. 2. Single-sided lighting method, the photovoltaic module is installed on a traditional column, the light source is located in front of the photovoltaic module, and the light intensity on the back of the module is equivalent to the light intensity on the front of the module through a theoretical formula. The front side of the module is illuminated on one side to calculate its bifaciality. However, this method only converts the single-sided light intensity through theoretical formulas, which cannot reflect the actual working conditions of photovoltaic modules. In addition, the theoretical formula does not reflect the conversion method of light intensity when the packaging materials and packaging processes on the front and back of the module are different. There is a large error in testing such modules. Summary of the invention

[0003] The utility model provides a photovoltaic module bifaciality testing system, which can truly simulate different reflection environments to test the bifaciality of photovoltaic modules, thereby testing the bifaciality differences of photovoltaic modules under different reflection environments and providing data support for related research.

[0004] The technical solution of the utility model is as follows: a photovoltaic module bifaciality testing system, comprising: a test light source, a bifaciality measuring device, a photovoltaic module mounting frame and a reflector mounting bracket, wherein the test light source is installed above the photovoltaic module mounting frame, the photovoltaic module mounting frame is used to install the photovoltaic module to be tested, the reflector mounting bracket is installed below the photovoltaic module mounting frame, the bifaciality measuring device is connected to the photovoltaic module to be tested, and the reflector mounting bracket is used to install reflectors with different reflectivities according to test requirements, and the area of ​​the reflector is larger than the area of ​​the photovoltaic module to be tested.

[0005] Furthermore, the photovoltaic assembly installation frame includes four frames, the four frames form a rectangular frame structure, each frame is provided with a mounting slot toward the inside of the frame, and the bottom side length of the mounting slot is greater than the top side length.

[0006] Furthermore, a screw hole is provided on the bottom edge of the mounting slot, a hand-tightening bolt is threadedly connected to the screw hole, and a cushion block is provided at the bottom of the hand-tightening bolt.

[0007] Furthermore, the reflector mounting bracket includes a base, a bracket and a mounting plate, the base is connected to the bracket, and the top of the bracket is hinged to the mounting plate.

[0008] Furthermore, bosses are arranged around the mounting plate.

[0009] Furthermore, the bracket is a telescopic rod.

[0010] Beneficial effects of the utility model: The utility model simplifies the double-sidedness test method, and only needs to illuminate the front side, without double-sided illumination or complex equivalent calculations. The light emitted by the test light source is reflected by a reflector with a larger area, and reflectors with different emissivity are replaced according to the test requirements to simulate different environments, so as to more realistically simulate the double-sidedness of the components under different reflection conditions. During the test of the utility model, the distance and angle between the photovoltaic component and the reflector can be adjusted, so as to simulate the double-sidedness of the component at different installation angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a schematic diagram of the photovoltaic component installation frame in the utility model.

[0013] Figure 3 for Figure 2 A partial enlarged view of .

[0014] Figure 4 This is a schematic diagram for installing the thumb bolts. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0016] In an embodiment of the present utility model, Figure 1 This is a schematic diagram of the structure provided according to the specific structure of a photovoltaic module bifaciality test system of the utility model. Figure 1As shown, the utility model specifically includes: a test light source 1, a double-sided rate measuring device 2, a photovoltaic module mounting frame 3 and a reflector mounting bracket. The test light source 1 is installed above the photovoltaic module mounting frame 3, and the brightness of the test light source 1 is adjusted according to the test requirements.

[0017] The photovoltaic module mounting frame 3 is used to mount the photovoltaic module to be tested. Specifically, the photovoltaic module mounting frame 3 includes four frames 31, and the four frames 31 form a rectangular frame structure. Each frame 31 is provided with a mounting slot 32 toward the inside of the frame, and the bottom length of the mounting slot 32 is greater than the top length. The photovoltaic module can be just stuck in the mounting slot 32 around the photovoltaic module mounting frame 3 without blocking the back of the photovoltaic module.

[0018] like Figure 3 and Figure 4 As shown, a screw hole 34 is provided on the bottom edge of the mounting slot 32, a hand-tightening bolt 35 is threadedly connected to the screw hole 34, and a cushion block 33 is provided at the bottom of the hand-tightening bolt 35. The photovoltaic module to be tested is clamped in the mounting slot 32 and fixed by the hand-tightening bolt 35, and the cushion block 33 can effectively protect the photovoltaic module from being scratched.

[0019] The bifaciality measuring device 2 is connected to the photovoltaic module to be tested, and a lead outlet is provided on the frame 31 of the photovoltaic module mounting frame 3, and the bifaciality measuring device 2 is connected to the photovoltaic module through the lead. It should be noted that the bifaciality measuring device 2 measures the actual power of the photovoltaic module and obtains the bifaciality based on the actual power. Among them, the device for measuring the actual power and the method for calculating the bifaciality are conventional technical means of those skilled in the art, so they will not be repeated here.

[0020] The reflector mounting bracket is installed below the photovoltaic module mounting frame 3, wherein the reflector mounting bracket includes a base 41, a column 42 and a mounting plate 43, wherein the base 41 is connected to the column 42, and the top of the column 42 is hinged to the mounting plate 43. Bosses 44 are arranged around the mounting plate 43 to prevent the reflector from sliding off. The column 42 is a telescopic rod. The reflector mounting bracket can adjust the angle and height of the reflector to simulate different installation angles of the photovoltaic module, thereby testing the bifaciality of the photovoltaic module at different installation angles.

[0021] The reflector mounting bracket is used to install reflectors of different reflectivity according to the test requirements, and the area of ​​the reflector is larger than the area of ​​the photovoltaic module to be tested. The reflectivity of the reflector is also adjusted according to the test requirements. The reflectivity can be controlled by controlling the material and surface roughness of the reflector to simulate different actual working scenes, so as to test the bifaciality of the photovoltaic module in different actual working scenes. Combined with the above-mentioned reflector mounting bracket, this system can measure the bifaciality of the photovoltaic module in different simulated working scenes and different installation angles.

[0022] The reflectivity required for specific scenes is shown in the following table.

[0023] place grassland Cement roof desert water surface Snow surface Reflectivity / % 25～30 5～20 40～50 5～10 80～90

[0024] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A photovoltaic module bifaciality testing system, characterized in that: include: A test light source (1), a bifaciality measurement device (2), a photovoltaic module mounting frame (3), and a reflector mounting bracket, wherein the test light source (1) is mounted above the photovoltaic module mounting frame (3), the photovoltaic module mounting frame (3) is used to mount the photovoltaic module to be tested, the reflector mounting bracket is mounted below the photovoltaic module mounting frame (3), the bifaciality measurement device (2) is connected to the photovoltaic module to be tested, and the reflector mounting bracket is used to mount reflectors with different reflectivities according to test requirements, and the area of ​​the reflector is larger than the area of ​​the photovoltaic module to be tested.

2. The photovoltaic module bifaciality testing system according to claim 1, characterized in that: The photovoltaic assembly mounting frame (3) comprises four frame frames (31), the four frame frames (31) forming a rectangular frame structure, each frame frame (31) being provided with a mounting slot (32) towards the inside of the frame, the bottom side length of the mounting slot (32) being greater than the top side length.

3. The photovoltaic module bifaciality testing system according to claim 2, characterized in that: A screw hole (34) is provided on the bottom edge of the mounting slot (32), a hand-tightening bolt (35) is internally threadedly connected to the screw hole (34), and a cushion block (33) is provided at the bottom of the hand-tightening bolt (35).

4. The photovoltaic module bifaciality testing system according to claim 1, characterized in that: The reflector mounting bracket comprises a base (41), a column (42) and a mounting plate (43); the base (41) is connected to the column (42), and the top of the column (42) is hinged to the mounting plate (43).

5. The photovoltaic module bifaciality testing system according to claim 4, characterized in that: Bosses (44) are arranged around the mounting plate (43).

6. The photovoltaic module bifaciality testing system according to claim 4, characterized in that: The upright column (42) is a telescopic rod.

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