Solar simulator dodging structure

Abstract

A dodging structure of a solar simulator belongs to the field of solar simulators, and is characterized by comprising a first dodging bin and a second dodging bin which are sequentially connected from top to bottom, the first dodging bin is in a circular truncated cone shape. A light source is arranged at the upper end of the first dodging bin; the lower end of the first dodging bin is provided with a dodging diaphragm; the uniform diaphragm comprises a circular frame body; an inhaul cable is arranged on the circular frame body; and a special-shaped sheet for shading is arranged on the inhaul cable. By improving the prior art, the first dodging bin is designed to be in a circular truncated cone shape, light reflection dead angles formed by the plane and the right-angle edge of the dodging bin of the box body are eliminated, and the light utilization rate is increased by 3%-20% (represented by solar cell incident light power) compared with a cubic structure; the light uniformizing diaphragm adopts a special-shaped sheet to uniformize light, so that the irradiation non-uniformity is less than or equal to 1%; the overall structure is simple, the dodging effect is good, and application and popularization are facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of solar simulators, and in particular relates to a uniform light structure for a solar simulator. Background Technology

[0002] Existing pulsed solar simulators mostly employ a box-structured light source box, combined with a uniform light diaphragm, steel wire, and a reflector with a reflective coating to achieve uniform light. The mainstream pulsed solar simulator's light source box generally consists of a box-shaped uniform light chamber, a rectangular lamp box, and filters. The uniform light diaphragm is constructed from a honeycomb shuttle-shaped light-reducing mesh, a honeycomb rectangular light-reducing mesh, or fine steel wire. The dark chamber can be divided into a completely dark chamber and a partially dark chamber equipped with a reflector. Multiple light sources, along with the box-shaped uniform light chamber and rectangular light-reducing mesh, ensure that the solar simulator's performance indicators reach A+A+A+ level. However, it also has the following drawbacks: multiple light sources increase the power consumption of the solar simulator, which leads to a sharp increase in the power supply pressure of the electrical control cabinet and a shortened lifespan of components such as energy storage capacitors; the plane and right-angle edges of the uniform light chamber in the enclosure will cause light to be reflected multiple times, forming reflection dead angles in the corner areas. These dead angles will affect the uniformity of light in the light source box, thereby reducing the lighting efficiency and accuracy of the equipment, especially in application scenarios that require high uniform lighting; currently, production lines and laboratories require various testing conditions, including fully darkrooms and non-fully darkrooms, and the uniform light structure needs to meet the spatial non-uniformity of irradiance under different conditions. Summary of the Invention

[0003] The present invention aims to solve the above problems and provide a solar simulator uniform light structure that improves the illumination efficiency of the solar simulator and reduces power consumption.

[0004] The solar simulator uniform light structure of this utility model includes a first uniform light chamber and a second uniform light chamber connected sequentially from top to bottom;

[0005] The first uniform light chamber is frustum-shaped;

[0006] A light source is provided at the upper end of the first light-diffusing chamber;

[0007] A light-diffusing barrier is provided at the lower end of the first light-diffusing chamber;

[0008] The light-shielding aperture includes a circular frame; a pull cable is provided on the circular frame; and an irregularly shaped piece for light blocking is provided on the pull cable.

[0009] Furthermore, in the solar simulator uniform light structure of this utility model, the upper end surface radius of the first uniform light chamber is 35cm-100cm; the lower end surface radius is 35cm-100cm; and the height is 50cm-180cm.

[0010] Furthermore, in the solar simulator uniform light structure of this utility model, the irregularly shaped sheet has a shape including spindle, rhombus and quasi-spindle; the irregularly shaped sheet structure can specifically block the light emitted by the light source, so that the light received by the irradiated surface is evenly distributed and has a consistent intensity, thus solving the problem of uneven light distribution on the irradiated surface.

[0011] Furthermore, in the solar simulator uniform light structure of this invention, the inner wall of the first uniform light chamber is configured as a reflective surface; the second uniform light chamber is configured as a dark chamber. A portion of the main light emitted by the light source is directly scattered onto the surface of the solar cell under test through the first and second uniform light chambers, a portion is reflected by the first uniform light chamber and then scattered onto the surface of the solar cell under test, and the remainder is absorbed by the second uniform light chamber. Configuring the first uniform light chamber as a reflective surface improves light utilization; simultaneously, configuring the second uniform light chamber as a dark chamber reduces instability caused by factors such as installation position misalignment and deformation when using reflective materials such as polytetrafluoroethylene (PTFE). In addition, the completely black structure of the dark chamber is relatively simple to implement and can effectively reduce costs.

[0012] Furthermore, the solar simulator uniform light structure of this utility model has a single, dual, triple, or quadruple light source. Combined with the first uniform light chamber and uniform light aperture, it achieves higher irradiance under the same energy supply, reducing the energy supply pressure on the electrical control cabinet.

[0013] The solar simulator uniform light structure of this utility model improves upon existing technologies by designing the first uniform light chamber as a frustum shape, eliminating the dead angles of light reflection formed by the plane and right-angled edges of the uniform light chamber. Compared with the cubic structure, the light utilization rate is improved by 3%-20% (characterized by the incident light power of the solar cell). The uniform light stop uses an irregularly shaped sheet for uniform light distribution, resulting in an irradiance non-uniformity of ≤1%. The overall structure is simple, the uniform light effect is excellent, and it is suitable for widespread application. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the uniform light structure of the solar simulator according to an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the uniform aperture structure described in an embodiment of the present invention;

[0016] Among them, 1-light source, 2-first uniform light chamber, 3-uniform light aperture, 4-second uniform light chamber, 5-solar cell under test, 6-pull rod, 7-circular frame, 8-rhomboid piece, 9-spindle piece, 10-spindle-shaped piece, 11-pull cable. Detailed Implementation

[0017] The uniform light structure of the solar simulator described in this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] This embodiment discloses a uniform light structure for a solar simulator, such as... Figure 1 As shown, it includes a first light-diffusing chamber 2 and a second light-diffusing chamber 4 connected sequentially from top to bottom; the first light-diffusing chamber 2 is frustum-shaped; a light source 1 is provided at the upper end of the first light-diffusing chamber 2; and a light-diffusing aperture 3 is provided at the lower end of the first light-diffusing chamber 2. In this embodiment, the upper surface radius of the first light-diffusing chamber 2 is 40cm; the lower surface radius is 55cm; and the height is 100cm.

[0019] In the embodiments disclosed herein, such as Figure 2 As shown, the light-diffusing barrier 3 includes a circular frame 7; a cable 11 is provided on the circular frame 7, and the cable 11 is a steel wire with a cross-sectional diameter of 1mm. In this embodiment, the cable 11 is connected to the circular frame 7 via an adjustable pull rod 6; the cable 11 is provided with multiple irregularly shaped pieces for light blocking, including a spindle-shaped piece 9, a rhombus-shaped piece 8, and a spindle-like piece 10. In specific applications, the cable 11 and the irregularly shaped pieces can be adjusted along the XY direction within the circular frame 7; the light-diffusing barrier 3 and the cable 11 as a whole can be raised and lowered along the Z direction to achieve a wider range of light-diffusing adjustment effects.

[0020] Meanwhile, in this embodiment, the side of the frustum is a smooth surface, and the inner wall of the first uniform light chamber 2 is made of white polypropylene (PP) reflective film, titanium dioxide (TiO2) coating, white polyethylene (PE) film, and white polytetrafluoroethylene (PTFE) as a reflective surface. The second uniform light chamber 4 is set as a darkroom. The light source 1 is a single light source 1. In specific applications, dual light sources 1, triple light sources 1, or quad light sources 1 can be selected according to the actual situation. The light source 1, combined with the first uniform light chamber 2 and the uniform light stop 3, achieves higher irradiance under the same energy supply, reducing the energy supply pressure on the electrical control cabinet.

[0021] When in use, part of the light emitted by the light source 1 is directly scattered onto the surface of the solar cell 5 under test through the first uniform light chamber 2 and the second uniform light chamber 4, part is reflected by the first uniform light chamber 2 and scattered onto the surface of the solar cell under test, and the rest is absorbed by the second uniform light chamber 4; the light passing through the uniform light barrier 3 achieves a uniform light effect under the shading of the irregular sheet, and obtains the illumination conditions that meet the indicators such as irradiance uniformity.

Claims

1. A homogenization structure for a solar simulator, characterized by: The first and second uniform light warehouses are connected in sequence from top to bottom. The first uniform light warehouse is in the shape of a circular truncated cone. The upper end of the first uniform light warehouse is provided with a light source. The lower end of the first uniform light warehouse is provided with a uniform light diaphragm. The uniform light diaphragm comprises a circular frame body, a cable is arranged on the circular frame body, and a special-shaped sheet for light shielding is arranged on the cable.

2. The homogenizing structure of a solar simulator according to claim 1, characterized in that: The upper end surface radius of the first uniform light warehouse is 35-100 cm, the lower end surface radius is 35-100 cm, and the height is 50-180 cm.

3. The homogenizing structure of a solar simulator according to claim 2, characterized in that: The special-shaped sheet is in the shape of a shuttle, a rhombus or a shuttle-like shape.

4. The homogenizing structure of a solar simulator according to claim 3, wherein: The inner wall of the first uniform light warehouse is provided as a light-reflecting surface. The second uniform light warehouse is provided as a darkroom.

5. The homogenizing structure of a solar simulator according to claim 4, characterized in that: The light source is a single light source or a double light source or a triple light source or a quadruple light source.

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