A detection device

Abstract

The utility model discloses an equipment for detecting. The equipment for detecting includes: box, the light array is located the first inside of box, and each inside of box adjacent with the first inside is mirror surface structure, the reflector is located the inside of box, and the reflector is used for reflecting the light that solar cell is received the light array's illumination and emits, and the solar cell is located the second inside of box, and the first inside and the second inside are opposite sides, the camera is located between the reflector and solar cell, and the camera is used for through the reflector and is used for taking the photoluminescence image of solar cell to carry out photoluminescence detection to solar cell. The equipment for detecting provided by the utility model embodiment can guarantee the uniformity of illumination.

Description

Technical Field

[0001] This utility model relates to detection technology, and more particularly to a detection device. Background Technology

[0002] Testing equipment, such as photoluminescence testing equipment, is used to detect the photoluminescence of solar cells. Currently, existing testing equipment suffers from uneven illumination when performing photoluminescence testing on solar cells. Utility Model Content

[0003] This invention provides a detection device to ensure uniform illumination.

[0004] This utility model embodiment provides a detection device, including:

[0005] Box;

[0006] The light array is located on the first inner side of the housing, and each inner side of the housing adjacent to the first inner side is a mirror structure.

[0007] A reflector is located inside the housing. The reflector is used to reflect the light emitted by the solar cells when they are illuminated by the lamp array. The solar cells are located on the second inner side of the housing. The first inner side and the second inner side are opposite sides.

[0008] A camera is located between the reflector and the solar cell. The camera is used to capture a photoluminescence image of the solar cell through the reflector in order to detect the photoluminescence of the solar cell.

[0009] Optionally, the camera is located on the third inner side of the housing, and both the first inner side and the second inner side are adjacent to the third inner side.

[0010] Optionally, the third inner side is provided with an opening, and the camera is located at the opening.

[0011] Optionally, the vertical projection of the reflector on the first inner side surface does not overlap with the vertical projection of the solar cell on the first inner side surface.

[0012] Optionally, the distance between the center of the reflector and the center of the solar cell is in the range of 180mm-350mm.

[0013] Optionally, the mirror structure is a total internal reflection mirror structure.

[0014] Optionally, the light array includes multiple LED lights or multiple laser light sources, and the LED lights are arranged in a regular pattern, which is one or more combinations of radial distribution, ring distribution, and central symmetrical distribution; the distance between two adjacent LED lights is 0.5cm-5cm.

[0015] Optionally, the reflector has a reflectivity greater than 90% in the visible to near-infrared band.

[0016] Optionally, the reflector and the camera are located on the same side of the housing.

[0017] Optionally, the number of inner sides of the housing adjacent to the first inner side is four.

[0018] The detection device provided in this embodiment of the present invention includes: a housing; a lamp array located on the first inner side of the housing, wherein each inner side of the housing adjacent to the first inner side is a mirror structure; a reflector located inside the housing, the reflector being used to reflect the light emitted by the solar cell when irradiated by the lamp array, the solar cell being located on the second inner side of the housing, the first inner side and the second inner side being opposite sides; and a camera located between the reflector and the solar cell, the camera being used to capture a photoluminescence image of the solar cell through the reflector for photoluminescence detection of the solar cell. The detection device provided in this embodiment of the present invention performs photoluminescence detection of the solar cell by capturing a photoluminescence image of the solar cell with a camera. The solar cell and the lamp array are located on opposite sides of the housing, and the light emitted by the lamp array vertically irradiates the solar cell, which can solve the problem of uneven illumination in the prior art where a planar laser is used to irradiate the solar cell from one side, thereby ensuring uniform illumination. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a testing device provided in an embodiment of this utility model. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] Figure 1 This is a schematic diagram of the structure of a testing device provided in an embodiment of this utility model. (Reference) Figure 1The detection equipment includes: a housing 10, a lamp array 20, a reflector 30, and a camera 40; wherein, the lamp array 20 is located on the first inner side of the housing 10, and each inner side of the housing 10 adjacent to the first inner side is a mirror structure; the reflector 30 is located inside the housing, and the reflector 30 is used to reflect the light emitted by the solar cell 50 when it is illuminated by the lamp array, and the solar cell 50 is located on the second inner side of the housing 10, with the first inner side and the second inner side being opposite sides; the camera 40 is located between the reflector 30 and the solar cell 50, and the camera 40 is used to capture the photoluminescence image of the solar cell 50 through the reflector 30, so as to perform photoluminescence detection on the solar cell 50.

[0022] Specifically, the detection equipment is a photoluminescence detection device, used to perform photoluminescence detection on the solar cell 50 by capturing photoluminescence images of the battery, such as the solar cell 50. The lamp array 20 is located on the first inner side of the housing 10, for example, on the inner top side of the housing 10, and the solar cell 50 is located on the second inner side of the housing 10, for example, on the inner bottom side of the housing 10. The light emitted by the lamp array 20 shines vertically downwards onto the solar cell 50 to ensure that the light emitted by the lamp array 20 can illuminate the solar cell 50 to the maximum extent. The camera 40 in the detection equipment captures photoluminescence images of the battery, such as the solar cell 50, through the reflector 30 to perform photoluminescence detection on the solar cell 50.

[0023] The detection device provided in this embodiment includes: a housing; a lamp array located on the first inner side of the housing, wherein each inner side of the housing adjacent to the first inner side is a mirror structure; a reflector located inside the housing, used to reflect the light emitted by the solar cell when illuminated by the lamp array, the solar cell being located on the second inner side of the housing, the first inner side and the second inner side being opposite sides; and a camera located between the reflector and the solar cell, used to capture a photoluminescence image of the solar cell through the reflector for photoluminescence detection. The detection device provided in this embodiment, by capturing a photoluminescence image of the solar cell with a camera and performing photoluminescence detection on the solar cell, and by having the solar cell and lamp array located on opposite sides of the housing, and the light emitted by the lamp array vertically illuminating the solar cell, solves the problem of uneven illumination in existing technologies that use area laser arrays to illuminate the solar cell from one side, thereby ensuring uniform illumination.

[0024] Optionally, the camera 40 is located on the third inner side of the housing 10, with the first and second inner sides adjacent to the third inner side.

[0025] Specifically, the third inner side of the housing 10 where the camera 40 is located is adjacent to the first inner side of the housing 10 where the lamp array 20 is located, and also adjacent to the second inner side of the housing 10 where the solar cell 50 is located. The lamp array 20 and the solar cell 50 are located on two opposite inner sides of the housing 10. This arrangement can prevent the camera 40 from blocking the light emitted by the lamp array 20 to the solar cell 50, and ensure that the light emitted by the lamp array 20 illuminates the solar cell 50 to the maximum extent.

[0026] Furthermore, camera 40 can be a polarization camera. A polarization camera can capture and analyze the polarization information of light, allowing it to acquire more optical features of an object. Light, as an electromagnetic wave, has a polarization state characteristic, that is, the direction of electromagnetic field vibration. The direction of electric field vibration of natural light is random, but after reflection, scattering, or passing through certain materials, it becomes polarized light. The core of a polarization camera lies in decoding the vibration direction of light waves. It integrates a micro-nano scale polarization filter array on the sensor surface. Each pixel can record the vibration angle of light. By calculating these angular differences, the polarization camera can identify different types of light, thereby acquiring the polarization information of the solar cell. A polarization camera can perform directional extinction, eliminating reflections and glare interference. Light reflected from smooth surfaces such as metals and glass is mostly polarized light. A polarization camera can filter out polarized light in specific directions by adjusting the angle of the polarizer, darkening reflective areas and highlighting defect details. A polarization camera can also reveal latent features, identifying differences invisible to the naked eye. Latent features such as internal stress of transparent parts and plastic textures cause changes in the polarization state of passing light. A polarization camera can capture these changes, transforming latent features into images with contrasting light and dark areas. The core advantage of polarized cameras over ordinary cameras is their ability to capture the polarization information of light, overcoming the limitations of ordinary cameras that only record light intensity and color. This allows them to eliminate reflection interference and identify latent features. Specifically, polarized cameras can eliminate reflections and glare, restoring the true appearance of objects: this is the most intuitive advantage of polarized cameras, solving the imaging pain point of ordinary cameras in strongly reflective scenes. When ordinary cameras photograph smooth surfaces, reflected light (mostly polarized light) can produce dazzling glare or white reflective areas, obscuring the details of the object's surface. Polarized cameras can precisely filter out reflected polarized light at specific angles by adjusting the polarization direction, eliminating reflective areas and clearly revealing the true details of the object's surface or interior. Polarized cameras can identify latent features and uncover unseen information: ordinary cameras can only record the brightness and color of light, while polarized cameras can capture latent features of objects that are invisible to the naked eye and ordinary cameras through differences in polarization states. The latent features of an object change the polarization state of light; this change cannot be perceived by ordinary cameras, but polarized cameras can transform it into an image with contrasting brightness, making it visible. Polarized cameras can enhance scene contrast and improve detail differentiation: In complex environments, polarized cameras can enhance the difference between the target and the background through polarization information, making details easier to distinguish. Ordinary cameras rely on light intensity and color contrast to distinguish the target from the background. When the colors and brightness of the two are similar, a blurry image that blends into one is easily produced. Polarized cameras can utilize the difference in polarization reflection of light between the target and the background. Even if the colors and brightness of the two are similar, they can form a clear contrast through the difference in polarization state, highlighting the target's outline and details.Polarized cameras can adapt to complex environments and reduce environmental interference: Polarized cameras have a much better anti-interference ability than ordinary cameras in harsh or special environments and are applicable to a wider range of scenarios; Ordinary cameras are easily affected by strong light, weak light or special media environments, and the image is easily overexposed, underexposed or blurred. Polarized cameras can reduce ambient light interference by filtering stray light (such as polarized light in strong light) and can still make stable images in complex environments.

[0027] Optionally, the third inner side is provided with an opening, and the camera 40 is located at the opening.

[0028] Specifically, an opening is provided on the third inner side of the housing 10, allowing the camera 40 to capture the photoluminescent image of the solar cell 50 reflected by the reflector through the opening. Furthermore, the camera 40, by capturing images through the reflector 30, achieves WYSIWYG (What You See Is What You Get) while maintaining image quality and speed during imaging; it enables optical viewfinder imaging, solving the need to accurately see the final image before shooting; it provides real-time synchronized images: light passes through the reflector 30 before being reflected to the camera 40, and the image on the camera 40 is the scene captured in real time by the lens, eliminating the delay of electronic viewfinder imaging; it improves focusing speed and accuracy, making focusing faster and more reliable. The reflector 30 can reduce image quality loss during imaging. Although the reflector 30 itself does not directly improve image quality, its placement can indirectly protect image quality in certain situations. The camera 40, through the reflector 30, allows light to directly pass through the lens into the image sensor. Since there are no additional optical elements blocking or converting the light, theoretically, this reduces light loss and ensures purer light received by the sensor. The camera 40 captures the photoluminescent image of the solar cell 50 by reflecting light from the mirror 30, resulting in high battery life during extended shooting. Furthermore, the distance between the mirror and the first inner side of the housing 10 is less than the distance between the mirror and the second inner side of the housing 10; that is, the distance between the mirror 30 and the lamp array 20 is less than the distance between the mirror 30 and the solar cell 50. This greater distance between the mirror 30 and the solar cell 50 prevents the mirror from getting too close to the solar cell 50, which would damage the normal imaging effect and visual appeal of the photoluminescent image.

[0029] Optionally, the vertical projection of the reflector 30 on its first inner surface does not overlap with the vertical projection of the solar cell 50 on its first inner surface. This arrangement ensures that the reflector 30 does not obstruct the light emitted from the lamp array 20 to the solar cell 50, and that the light emitted from the lamp array 20 illuminates the solar cell 50 to the maximum extent.

[0030] Furthermore, the core of solar cells is the direct conversion of solar energy into electrical energy. Their core value lies in achieving clean and renewable energy conversion, and they are widely used in various scenarios such as photovoltaic power generation. The power generation process of solar cells is based on the photovoltaic effect of semiconductors: Absorption of incident light: The core layer of the solar cell (such as a silicon-based semiconductor) absorbs photons from sunlight; Generation of charge carriers: When the photon energy is sufficient, it excites electrons in the semiconductor from their bound states, forming free electrons and positively charged holes (i.e., electron-hole pairs); Formation of current: The PN junction inside the semiconductor generates a built-in electric field, separating free electrons and holes to different regions, forming a potential difference; When an external circuit is connected, a continuous current is generated. Solar cell parameters such as conversion efficiency, open-circuit voltage, and short-circuit current directly affect power generation efficiency and cost. Conversion efficiency refers to the proportion of absorbed solar energy that a solar cell converts into electrical energy. For example, the efficiency of commercial silicon-based solar cells is approximately 18%-26%, while high-efficiency laboratory cells can exceed 30%. Open-circuit voltage refers to the maximum voltage across a solar cell when it is open-circuited (without a load). It is determined by the characteristics of the semiconductor material and the quality of the PN junction. Typically, the open-circuit voltage of silicon-based cells is between 0.6-0.7V. Short-circuit current refers to the maximum current when a solar cell is short-circuited (with zero external resistance). It is positively correlated with the incident light intensity, cell area, and light absorption efficiency; the larger the area and the stronger the illumination, the higher the short-circuit current usually is. Solar cells are mainly classified into three categories based on materials: crystalline silicon solar cells, thin-film solar cells, and third-generation solar cells. They differ significantly in their applicable scenarios and costs. Crystalline silicon solar cells are made of materials including monocrystalline silicon and polycrystalline silicon. They are technologically mature, highly stable, have a long lifespan (25-30 years), and are relatively inexpensive. However, their conversion efficiency improvement potential is limited, and they have poor flexibility. They are suitable for residential photovoltaic power stations, large-scale ground-mounted photovoltaic power stations, and distributed photovoltaic power stations. Crystalline silicon solar cells are made of materials including cadmium telluride and copper indium gallium (CIGa). They offer good flexibility, are lightweight, and perform well in low-light conditions, but have a relatively short lifespan (15-20 years). Some materials (such as cadmium) pose environmental risks. They are suitable for flexible photovoltaic modules, building-integrated photovoltaics (BIPV), and portable devices. Third-generation solar cells are made of materials including perovskite. They have high potential conversion efficiency (laboratory efficiency has exceeded 30%) and low manufacturing costs, but suffer from poor long-term stability and immature large-area fabrication technology. They are suitable for research and future high-efficiency photovoltaic systems.

[0031] Furthermore, the widespread application of solar cells stems from their unique energy attributes: Solar cells are clean and pollution-free: the power generation process produces no carbon emissions, no waste gas or wastewater, making them environmentally friendly. They are renewable: relying on sunlight, a resource that is inexhaustible and not limited by fossil fuel reserves. They are flexible in deployment: modules of different specifications can be manufactured, suitable for various scenarios such as rooftops, ground surfaces, and building facades, applicable from small-scale residential use to large-scale power plants. Solar cells can be used in distributed photovoltaics: installed on residential rooftops and industrial and commercial buildings to meet their own electricity needs, with surplus power fed into the grid; large-scale ground-mounted photovoltaic power plants: centrally constructed in wastelands and deserts, generating electricity on a large scale and feeding it into the grid as a basic power source; special scenarios: portable photovoltaic devices (such as photovoltaic power banks), spacecraft power supply (satellites, space stations), traffic lights, etc. Compared to traditional chemical batteries (such as lithium batteries and lead-acid batteries), the core advantage of solar cells is that they do not rely on chemical energy storage materials, directly converting solar energy into electrical energy, fundamentally eliminating dependence on limited resources and the problem of chemical pollution. Traditional chemical batteries rely on internal chemical substances (such as lithium, lead, and nickel) to store electrical energy. Once the energy is depleted, they need to be recharged (to replenish energy) or the batteries replaced (consuming chemical resources). These chemical resources are mostly non-renewable, and their extraction and processing create an environmental burden. Solar cells, on the other hand, offer renewable and inexhaustible energy, which is their core advantage and completely changes the traditional energy storage model. Solar cells draw their energy from sunlight, a renewable energy source. They can generate electricity continuously as long as there is sunlight, without being limited by Earth's resource reserves. Solar cells have zero emissions and low maintenance costs. They produce almost no pollution during power generation and use, and their simple structure results in low maintenance requirements. Traditional batteries (especially lead-acid batteries), if improperly handled during production, use, and disposal, can pollute soil and water sources with their heavy metal content (lead and cadmium). Solar cells are zero-pollution and zero-emission: they do not produce waste gas, wastewater, or noise during power generation, and there is no risk of chemical leakage, making them completely environmentally friendly. Traditional chemical batteries have a short lifespan (typically 1-5 years), requiring frequent charging and replacement, resulting in high long-term operating costs and maintenance effort. Solar cells, on the other hand, have extremely low maintenance costs: their simple structure (core semiconductor components), lack of moving parts, and lifespan of 25-30 years require only periodic surface cleaning, with virtually no other maintenance. Traditional batteries rely on external power sources for charging; once disconnected from the grid, they become unusable after their power is depleted. Solar cells offer flexible deployment and sustainable power supply. Their power generation characteristics allow them to adapt to more specialized scenarios, especially suitable for areas without grid coverage. Deployment is not limited by the grid: in remote mountainous areas, field operations, spacecraft, and other scenarios without grid coverage or where grid access is difficult, solar cells can generate electricity independently to meet power demands. Traditional batteries rely entirely on their stored energy for power generation; once depleted, they must be stopped and recharged.Solar cells have strong sustainable power supply capabilities: as long as there is sunlight (natural light or artificial light source during the day), solar cells can continuously output electrical energy, which can directly power equipment or be used with energy storage batteries to store electrical energy.

[0032] Optionally, the distance between the center of the reflector 30 and the center of the solar cell 50 can be in the range of 180mm-350mm. This setting can prevent the imaging effect of the photoluminescence image of the solar cell 50 captured by the camera 40 through the reflector 30 from being too close or too far from the solar cell 50.

[0033] Optionally, the mirror structure is a total reflection mirror structure.

[0034] Specifically, the total internal reflection mirror structure reflects the light emitted by the lamp array 20 onto the surface of the solar cells, reducing localized unevenness caused by the lack of surrounding illumination. The total internal reflection mirror structure achieves near 100% light reflectivity, minimizing light loss. The total internal reflection mirror structure boasts extreme reflection efficiency with virtually no energy loss, which is its core value; its reflection principle determines its extremely high light utilization rate. Ordinary mirrors (such as silver-plated or aluminum-plated mirrors) rely on metal coatings to reflect light, with reflectivity typically between 80% and 95%. The remaining 5% to 20% of light is absorbed or penetrated by the coating, resulting in energy loss. The total internal reflection mirror utilizes the principle of total internal reflection (when light travels from a denser medium to a less dense medium at an angle greater than the critical angle, all light is reflected without refraction), eliminating the need for metal coatings. Its reflectivity can approach 100%, with only a trace amount of absorption loss within the medium itself. This advantage is crucial in scenarios with extremely high light energy requirements, ensuring that light maintains high intensity even after multiple reflections. Total internal reflection (TIV) mirrors offer greater stability and a longer lifespan. Their structural characteristics allow them to maintain performance even in harsh environments, making them suitable for a wider range of applications. The metal coatings on ordinary coated mirrors are susceptible to environmental influences (such as humidity, oxidation, and corrosion), leading to delamination and blackening over time, resulting in decreased reflectivity and a shorter lifespan. TIV mirrors, however, rely on the optical properties of the medium itself for reflection, eliminating the need for a coating. Therefore, they exhibit exceptional corrosion and oxidation resistance, allowing them to operate stably even in harsh environments such as high temperature, high humidity, and strong radiation, resulting in a significantly longer lifespan than ordinary coated mirrors. TIV mirrors also avoid coating defects, resulting in more uniform optical performance. Their simplified structure provides a more stable and uniform optical effect. In contrast, uneven coating thickness or the presence of minute impurities or scratches on ordinary coated mirrors can cause spots and dark areas in the reflected light, affecting optical uniformity, especially significant for high-precision optical systems. The reflecting surface of a total internal reflection mirror is composed of a uniform optical medium (such as special glass or fiber end face). As long as the medium itself is uniform and free of defects, the intensity and phase of the reflected light can remain highly uniform, without optical interference caused by coating defects, resulting in high reliability.

[0035] Optionally, the light array 20 includes multiple LED lights or multiple laser light sources, with each LED light arranged in a regular pattern, such as a radial distribution, a ring distribution, or a centrally symmetrical distribution, or one or more combinations thereof; the distance between two adjacent LED lights is 0.5cm-5cm.

[0036] In one embodiment, the light array 20 includes multiple LED lights. Exemplarily, all LED lights in the light array 20 are symmetrically distributed in multiple rows and columns. The distance between two adjacent LED lights is not less than 0.5 cm and not more than 5 cm to prevent energy waste due to excessively small spacing and to prevent insufficient light intensity due to excessively large spacing. The diameter of a single LED light can be 0.5 mm to 7 mm. Furthermore, LED lights are energy-saving, long-lasting, and environmentally friendly, while also offering good luminous efficacy and flexible applications. The core advantages of LED lights are energy saving and long lifespan; these are the two most critical advantages of LED lights, directly determining their operating costs and replacement frequency. LED lights are extremely energy-efficient: the luminous efficacy (luminous flux per unit power) of LED lights is far higher than that of traditional lamps. Compared to incandescent lamps, LED lights can achieve an energy saving rate of 80%-90%, and their power consumption is only about 1 / 10 of that of incandescent lamps at the same brightness. Compared to energy-saving lamps, LED lights can also achieve an energy saving rate of 20%-30%, significantly reducing electricity costs over long-term use. LED lights have an extremely long lifespan: the average lifespan of an LED light is typically 50,000 to 100,000 hours, several times or even dozens of times longer than traditional lighting fixtures. Incandescent bulbs have a lifespan of about 1,000 hours, while LED lights have a lifespan 50-100 times longer. Energy-saving lamps have a lifespan of about 8,000 hours, while LED lights have a lifespan 6-12 times longer, significantly reducing the hassle and cost of replacing lights. Besides their core advantages of energy saving and long lifespan, LED lights also offer significant advantages in user experience and environmental friendliness. LED lights are environmentally friendly and pollution-free: LED lights do not contain toxic or harmful substances such as mercury and lead, while energy-saving lamps and fluorescent lamps contain mercury, which pollutes the environment after disposal. At the same time, the high energy efficiency of LED lights indirectly reduces carbon emissions during power generation. LED lights offer superior luminous efficacy and user experience, with a fast response time: LED lights illuminate instantly upon power-up, without delay, while energy-saving lamps and incandescent bulbs require a warm-up period. They also boast strong dimming capabilities: LED lights support multiple brightness adjustments, allowing users to customize light intensity for different scenarios. Furthermore, LED lights primarily convert electrical energy into light energy, generating minimal heat and avoiding the safety hazards and energy waste associated with high temperatures in traditional lighting fixtures. LED lights are also compact, highly designable, and adaptable to various special scenarios. Their strong vibration and impact resistance makes them more suitable for outdoor or mobile environments compared to traditional lighting. Additionally, if white light is used in LED lights, it must closely approximate the standard solar spectrum; monochromatic light can also be used, including near-infrared light with a deeper depth of incidence. The light intensity distribution within the LED light's illumination area must be uniform, with a deviation controlled within ±5%; the light intensity of the LED lights must remain stable during testing.

[0037] In another embodiment, the lamp array 20 includes multiple laser light sources. The laser light sources are characterized by high directionality, high monochromaticity, and high brightness. They have concentrated energy, high density, high laser color purity, and fast response speed. The switching and intensity adjustment of the laser can be completed in a very short time, and they have strong penetrability.

[0038] Optionally, the reflector 30 has a reflectivity greater than 90% in the visible to near-infrared band. This setting minimizes light loss, ensures image quality, and maximizes the lossless transmission of light in the target band, avoiding information loss or image quality degradation. It also results in clearer and brighter images, reducing light attenuation during reflection, leading to brighter images with clearer details, preventing darkening or reduced contrast due to light loss. The high-reflectivity reflector is compatible with light sources of different bands, eliminating the need for separate optical components for each band and simplifying the equipment structure. High reflectivity reduces ineffective energy consumption, indirectly improving the energy efficiency and stability of the detection equipment. It also reduces heat buildup: unreflected light is converted into heat (lower reflectivity generates more heat); a reflectivity of over 90% significantly reduces heat generation, preventing the reflector from aging and deforming due to high temperatures, while also reducing the heat dissipation burden on the detection equipment and extending its lifespan. Furthermore, the small surface flatness error of the reflector 30 ensures accurate direction of reflected light.

[0039] Optionally, the reflector 30 and the camera 40 are located on the same side of the housing 10. This arrangement facilitates the camera 40 capturing photoluminescence images of the solar cell 50 through the reflector 30. Additionally, the distance between the reflector 30 and the solar cell 50 is greater than the distance between the camera 40 and the solar cell 50.

[0040] Optionally, the number of inner sides of the housing 10 adjacent to the first inner side is four.

[0041] For example, the box 10 has a cuboid structure, which is simple to manufacture and easy to process and produce. The first inner side of the box is the inner top side of the box, the second inner side is the inner bottom side of the box, and the inner sides adjacent to the first inner side are the four sides adjacent to the top and bottom of the box (the four mirrored inner walls A).

[0042] In addition, the enclosure 10 can be a steel structure to avoid external light interference and reduce internal light reflection errors. It must also consider structural stability and the requirements of the usage scenario. The enclosure 10 should isolate all external ambient light (such as natural light and indoor lighting) to prevent it from entering the enclosure and affecting the detection accuracy, while supporting the internal structure. The enclosure 10 can be made of cold-rolled steel / galvanized steel: extremely strong light-shielding, completely opaque; high structural strength, suitable for large or heavy-duty enclosures, impact-resistant and not easily deformed; easy to spray-paint, further enhancing light-shielding and corrosion resistance. The enclosure 10 can also be made of engineering plastics: lightweight, easier to process than metal (can be injection molded into complex shapes); the surface can be matte light-shielding, meeting light-shielding standards; resistant to chemical corrosion, not easy to rust, suitable for light-duty laboratory use. The enclosure 10 can also be made of aluminum alloy (with a light-shielding coating): lighter than steel and stronger than plastic; the surface is sprayed with matte black light-shielding paint (such as epoxy light-shielding paint).

[0043] The detection device provided in this embodiment includes: a housing; a lamp array located on the first inner side of the housing, wherein each inner side of the housing adjacent to the first inner side is a mirror structure; a reflector located inside the housing, the reflector being used to reflect the light emitted by the solar cell when illuminated by the lamp array, the solar cell being located on the second inner side of the housing, the first inner side and the second inner side being opposite sides; a camera located between the reflector and the solar cell, the camera being used to capture a photoluminescence image of the solar cell through the reflector for photoluminescence detection of the solar cell; the camera being located on the third inner side of the housing, the first inner side and the second inner side being adjacent to the third inner side; the third inner side having an opening, the camera being located at the opening; the reflector and the camera being located on the same side of the housing. The detection device provided in this embodiment captures the photoluminescence image of the solar cell with a camera and performs photoluminescence detection on the solar cell. The solar cell and the lamp array are located on opposite sides of the housing. The light emitted by the lamp array vertically illuminates the solar cell, which can solve the problem of uneven illumination in the prior art where the solar cell is illuminated from one side by a planar laser array, thereby ensuring uniform illumination. Furthermore, the vertical projection of the reflector on the first inner side does not overlap with the vertical projection of the solar cell on the first inner side, which can prevent the reflector from blocking the light emitted by the lamp array to the solar cell, ensuring that the light emitted by the lamp array illuminates the solar cell to the maximum extent.

[0044] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A testing device, characterized in that, include: Box; The light array is located on the first inner side of the housing, and each inner side of the housing adjacent to the first inner side is a mirror structure. A reflector is located inside the housing. The reflector is used to reflect the light emitted by the solar cells when they are illuminated by the lamp array. The solar cells are located on the second inner side of the housing. The first inner side and the second inner side are opposite sides. A camera is located between the reflector and the solar cell. The camera is used to capture a photoluminescence image of the solar cell through the reflector in order to detect the photoluminescence of the solar cell.

2. The detection device according to claim 1, characterized in that, The camera is located on the third inner side of the housing, and the first inner side and the second inner side are both adjacent to the third inner side.

3. The detection device according to claim 2, characterized in that, The third inner side is provided with an opening, and the camera is located at the opening.

4. The detection device according to claim 1, characterized in that, The vertical projection of the reflector onto the first inner surface does not overlap with the vertical projection of the solar cell onto the first inner surface.

5. The detection device according to claim 1, characterized in that, The distance between the center of the reflector and the center of the solar cell ranges from 180mm to 350mm.

6. The detection device according to claim 1, characterized in that, The mirror structure is a total reflection mirror structure.

7. The detection device according to claim 1, characterized in that, The light array includes multiple LED lights or multiple laser light sources. The LED lights are arranged in a regular pattern, which can be one or more combinations of radial, annular, or centrally symmetrical distribution. The distance between two adjacent LED lights is 0.5cm-5cm.

8. The detection device according to claim 1, characterized in that, The reflector has a reflectivity of more than 90% in the visible to near-infrared band.

9. The detection device according to claim 1, characterized in that, The reflector and the camera are located on the same side of the housing.

10. The detection device according to claim 1, characterized in that, The number of inner sides of the box that are adjacent to the first inner side is four.

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