A solar simulator and a battery testing system

Abstract

The utility model discloses a kind of sunlight simulation device and battery testing system, by constructing the array type light source frame of multiple modularized light source composition, and combining the reflector structure being set in below it, the transformation of first light source signal to second light source signal is realized, can effectively simulate AM1.5G standard sunlight spectrum.Compared with traditional xenon lamp or bulky LED simulator, the device has the significant advantages of compact structure, high spectral fitting degree, stable light output, efficient heat management, etc.;Among them, the modular light source uses full-spectrum LED unit, which can be flexibly combined to meet different size testing requirements, improving the scalability and adaptability of the system.

Description

Technical Field

[0001] This utility model relates to the field of optical instrument technology, and in particular to a sunlight simulation device and a battery testing system. Background Technology

[0002] With the continuous development of new solar cell technologies, especially the extensive research on high-efficiency optoelectronic devices such as perovskite solar cells, researchers have placed higher demands on the testing of cell performance. During experiments and testing, there is an urgent need for a stable artificial light source system that highly simulates the natural solar spectrum in order to evaluate key parameters such as the output performance, energy conversion efficiency, and long-term stability of solar cells under standard conditions.

[0003] Most mainstream solar simulators in related technologies use xenon lamps as their light source. For example, while xenon lamp solar simulators can provide a relatively wide spectral range, they have significant drawbacks such as large size, low energy efficiency, high power consumption, and short lifespan (usually about 3000 hours), which seriously affect the continuity and economy of experiments. In addition, the output stability of xenon lamp point light sources is relatively poor, which also negatively affects the repeatability of experiments.

[0004] With the advancement of LED light source technology, some manufacturers have begun to explore the use of LED arrays to construct solar simulation systems in order to improve system efficiency and lifespan. However, existing LED simulators generally suffer from the following problems: firstly, they are still large in size and complex in structure, making them inconvenient to move or integrate in the laboratory; secondly, their emission spectrum often cannot achieve a high degree of matching with the standard solar spectrum, resulting in experimental results that deviate from real environmental conditions. Utility Model Content

[0005] The main objective of this invention is to provide a solar simulation device and a battery testing system to at least solve the technical problems in the related art.

[0006] To achieve the above objectives, a first aspect of this utility model provides a sunlight simulation device for testing batteries, the sunlight simulation device comprising:

[0007] Light source frame,

[0008] Multiple modular light sources are fixed within the light source frame;

[0009] A reflector frame is fixed to the light source frame and located below the light source frame;

[0010] At least one reflector is mounted on the reflector frame;

[0011] At least one electrical connector is provided for electrical connection to an external power source and for powering the plurality of said modular light sources;

[0012] The modular light sources are arranged in an array within the light source frame to generate a first light source signal. The reflector is used to integrate and process the first light source signal to emit a second light source signal to simulate the solar spectrum.

[0013] A second aspect of this invention provides a battery testing system, including a battery clamp, a photovoltaic cell, and a solar simulation device as described in the first aspect; the battery clamp is used to hold the photovoltaic cell, and the solar simulation device emits a second light source signal to simulate the solar spectrum for testing the photovoltaic cell.

[0014] This utility model discloses a solar simulation device and battery testing system. By constructing an array-type light source frame composed of multiple modular light sources and combining it with a reflector structure located below, it achieves the conversion of the first light source signal to the second light source signal, effectively simulating the AM1.5G standard solar spectrum. Compared with traditional xenon lamps or bulky LED simulators, this device has significant advantages such as compact structure, high spectral fitting accuracy, stable light output, and efficient thermal management. The modular light sources use full-spectrum LED units, which can be flexibly combined to adapt to different size testing requirements, improving the system's scalability and adaptability. At the same time, by setting up unified power supply through electrical connectors, wiring and operation procedures are simplified, and the overall efficiency, accuracy, and repeatability of solar cell testing are improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional schematic diagram of a sunlight simulation device provided in an embodiment of this application;

[0017] Figure 2 A front view of the sunlight simulation device provided in the embodiments of this application;

[0018] Figure 3 This is a three-dimensional schematic diagram of a modular light source in an embodiment of this application;

[0019] Figure 4 This is a front view of the modular light source in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of a 2x2 matrix array arrangement of multiple modular light sources in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of a 3x3 matrix array arrangement of multiple modular light sources in an embodiment of this application;

[0022] Figure 7 A three-dimensional schematic diagram of a sunlight simulation device provided in an embodiment of this application;

[0023] Figure reference numerals: 1. Sunlight simulation device; 11. Modular light source; 12. Light source frame; 13. Air intake structure; 14. Reflector; 15. Reflector frame; 16. Electrical connector; 17. Lens structure; 112. Heat dissipation structure; 111. Exhaust fan; 113. Single full-spectrum LED light source. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that related terms such as "first" and "second" can be used to describe various components, but these terms do not limit the component. These terms are only used to distinguish one component from another. For example, without departing from the scope of this utility model, the first component can be referred to as the second component, and the second component can similarly be referred to as the first component. The term "and / or" refers to any one or more combinations of related and descriptive terms.

[0026] Please see Figures 1 to 2 This application provides a solar simulation device 1 for performing spectral simulation tests on a battery (photovoltaic cell) to evaluate the battery's performance under standard sunlight conditions.

[0027] The aforementioned solar simulation device 1 includes at least a light source frame 12, a modular light source 11, a reflector frame 15, a reflector 14, and an electrical connector 16. The components are described below:

[0028] The light source frame 12 can be a rectangular frame or other polygonal frame structure, mainly serving to provide structural support for the entire device and to fix multiple modular light sources 11. Generally, the light source frame is made of metal, possessing good strength and heat resistance, ensuring structural stability under long-term illumination.

[0029] Multiple modular light sources 11 are evenly distributed and fixed inside the light source frame 12, forming an n×n matrix array arrangement (for 2×2 scale, please refer to [reference]). Figure 5 For a 3x3 scale, please refer to [reference needed]. Figure 6 The modular light source 11 can generate a first light source signal covering multiple bands from ultraviolet to near-infrared.

[0030] The reflector frame 15 is fixedly connected to the light source frame 12 and is located below it, supporting at least one reflector 14. The frame is also made of high-temperature resistant material and can be equipped with an adjustment mechanism for precisely adjusting the position and angle of the reflector to achieve the best light integration effect.

[0031] There are multiple reflectors 14, each mounted on a reflector frame 15. When four reflectors 14 are positioned directly below the light source array to form a rectangular reflector unit, the first light source signals emitted from multiple modular light sources 11 can be converged and integrated. The second light source signal formed after reflection has good directionality and uniformity to simulate a standard solar spectrum (such as AM1.5G).

[0032] There is at least one electrical connector 16, which is used to connect to an external power source and provide stable power to each modular light source 11. The electrical connector 16 is located on one side or the back of the light source frame 12 for easy connection and maintenance, and supports parallel power supply and independent control.

[0033] In the implementation of the solar simulation device 1 of this application embodiment, multiple modular light sources 11 are arranged in an array within the light source frame 12 and used to generate a first light source signal. The reflector 14 is used to integrate and process the first light source signal to emit a second light source signal for simulating the solar spectrum.

[0034] It should be noted that the first light source signals (light rays) emitted by the multiple modular light sources 11 have a certain degree of divergence, and the directions of the light rays may not be consistent. By reflecting and guiding these light rays, the reflector 14 can effectively converge and integrate the first light source signals emitted by the multiple modular light sources 11, and finally output a second light source signal with a consistent direction and high uniformity. This step is crucial to the uniformity of light intensity and the quality of the light spot.

[0035] As can be seen, the solar simulation device 1 provided in this application embodiment can stably and efficiently reproduce the AM1.5G standard solar spectrum in an indoor environment. It has high spectral coverage and good light uniformity, and is suitable for testing various types of solar cells, especially for experimental research on novel cells such as perovskite and organic photovoltaic cells. It also has the advantages of compact structure, convenient use, and high thermal management efficiency.

[0036] Please see Figure 3 and Figure 4 Each modular light source 11 includes a heat dissipation structure 112, an exhaust fan 111, and a single full-spectrum LED light source 113.

[0037] The heat dissipation structure 112 is located between the single full-spectrum LED light source 113 and the exhaust fan 111. That is, the single full-spectrum LED light source 113 is located on one side of the heat dissipation structure 112, generating a first light source signal for simulating the solar spectrum; while the exhaust fan 111 is located on the other side of the heat dissipation structure 112, forming an airflow away from the heat dissipation structure 112.

[0038] In each modular light source 11, the heat dissipation structure 112 is in thermal contact with the single full-spectrum LED light source 113 to uniformly conduct the heat generated by the full-spectrum LED light source 113, and finally the exhaust fan 111 provides airflow to carry away the heat accumulated on the heat dissipation structure away from the heat dissipation structure 112.

[0039] It should be understood that the single full-spectrum LED light source 113 includes an LED light-emitting component, which integrates multiple LED chips for emitting light signals of different wavelengths. These LED chips cover the visible light band and part of the near-ultraviolet and near-infrared bands in the solar spectrum to achieve accurate simulation of the AM1.5G standard solar spectrum.

[0040] Please return and refer to Figure 1 The solar simulation device 1 also includes an air intake structure 13.

[0041] The air intake structure 13 is located on the periphery of the light source frame 12, and includes multiple air intake fans arranged in a ring around the outer wall of the light source frame 12. Each air intake fan is oriented towards the interior of the light source frame and is used to actively draw in external air.

[0042] During the operation of the solar simulation device 1, the intake fan generates a continuous airflow, thereby guiding cooling air into the interior of the light source frame and assisting the exhaust fan 111 in the modular light source 11 to form an intake-exhaust ventilation circulation system. By constructing this airflow channel, the efficiency of heat conduction and exhaust from the modular light source can be significantly improved, avoiding light decay, shortened lifespan, or spectral drift caused by high temperatures in the light source components.

[0043] In an optional embodiment of this application, the number of reflectors 14 is four. The four reflectors 14 are arranged in a rectangular array on the reflector frame 15 and correspond to the light emission positions of multiple modular light sources 11 in the light source frame 12.

[0044] During operation, the first light source signal generated by each modular light source 11 is converged, mixed, and integrated by the corresponding reflector 14 directly below it. Finally, the reflectors 14 combine to form a uniform and highly directional second light source signal. This simulated light can accurately simulate the spectral distribution characteristics of sunlight and meet the testing requirements of standards such as AM1.5G.

[0045] Please see Figure 7 The sunlight simulation device 1 also includes a lens structure 17.

[0046] Specifically, the lens structure 17 is disposed in the internal region of the reflector frame 15. The lens structure 17 includes at least one lens for further directional control and collimation of the first light source signal generated by the modular light source 11 and integrated by the reflector 14.

[0047] Specifically, the lens structure 17 controls the refraction, focusing, or divergence of light signals emitted from different angles, thereby giving the output second light source signal stronger directionality and beam uniformity, effectively simulating the characteristics of a parallel beam from distant solar radiation. This structural design helps improve the overall performance of the simulated light source in terms of spectral distribution, directionality, and illumination uniformity, making it more suitable for high-precision solar cell performance testing.

[0048] It should be noted that incorporating a lens assembly within the reflector frame helps improve the directionality and collimation of light. This is particularly crucial for simulating parallel sunlight conditions, ensuring that the light exit angle is controlled within an acceptable range of solar incidence angles.

[0049] In an optional embodiment of this application, the multiple modular light sources 11 are detachably fixed within the light source frame 12.

[0050] Specifically, each modular light source 11 can be installed in the light source frame 12 via threaded connections, sliding rail locking, or snap-fit ​​structures, facilitating flexible disassembly and replacement by the user according to different testing needs. Furthermore, the number of modular light sources 11 is not fixed but can be adjusted based on the area of ​​the battery under test, illumination requirements, or light field uniformity indicators in the testing environment. For example, when testing large-area photovoltaic modules, a larger illumination array can be formed by expanding more modular light source units; while in small-area precision testing, the number of modules can be reduced to save energy and improve control accuracy.

[0051] In an optional embodiment of this application, the first light source signals emitted by the multiple modular light sources 11, after passing through the reflector 14 and / or lens structure 17, form a second light source signal that covers the 350nm to 1100nm band of the AM1.5G standard solar spectrum. This band covers the key visible and near-infrared regions commonly used in solar photovoltaic testing.

[0052] Furthermore, within the 350nm to 1100nm wavelength range, the second light source signal has a Class A spectral matching degree, which meets the technical requirement of IEC 60904-9 (or equivalent standard) that the spectral matching error does not exceed ±25%, thereby ensuring that the output spectrum of the solar simulation device is highly fitted to real sunlight, which helps to improve the accuracy and repeatability of photovoltaic device testing.

[0053] This application also provides a battery testing system, including a battery clamp, a photovoltaic cell, and a solar simulation device as described in the above embodiments; the battery clamp is used to hold the photovoltaic cell, and the solar simulation device emits a second light source signal to simulate the solar spectrum for testing the photovoltaic cell.

[0054] The solar simulation device and battery testing system of this application, by constructing an array-type light source frame composed of multiple modular light sources and combining it with a reflector structure located below it, realizes the conversion of the first light source signal to the second light source signal, effectively simulating the AM1.5G standard solar spectrum. Compared with traditional xenon lamps or bulky LED simulators, this device has significant advantages such as compact structure, high spectral fitting degree, stable light output, and efficient thermal management. The modular light sources use full-spectrum LED units, which can be flexibly combined to adapt to different size testing requirements, improving the system's scalability and adaptability. At the same time, by setting up unified power supply through electrical connectors, the wiring and operation process are simplified, and the overall efficiency, accuracy, and repeatability of solar cell testing are improved.

[0055] The specific embodiments of the utility model have been described in detail above, but they are only examples, and the utility model is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the utility model are also within the scope of the utility model. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the utility model should be covered within the scope of the utility model.

Claims

1. A sunlight simulation device, characterized in that, The sunlight simulation device includes: Light source frame, Multiple modular light sources are fixed within the light source frame; A reflector frame is fixed to the light source frame and located below the light source frame; At least one reflector is mounted on the reflector frame; At least one electrical connector is provided for electrical connection to an external power source and for powering the plurality of said modular light sources; The modular light sources are arranged in an array within the light source frame to generate a first light source signal. The reflector is used to integrate and process the first light source signal to emit a second light source signal to simulate the solar spectrum.

2. The sunlight simulation device as described in claim 1, characterized in that, Each of the modular light sources includes a heat dissipation structure, an exhaust fan, and a single full-spectrum LED light source; The heat dissipation structure is located between the single full-spectrum LED light source and the exhaust fan; The exhaust fan is used to provide airflow in a direction away from the heat dissipation structure to remove the heat accumulated on the heat dissipation structure; The single full-spectrum LED light source is mounted on the heat dissipation structure and is used to generate the first light source signal; The heat dissipation structure is used to make thermal contact with the single full-spectrum LED light source so as to uniformly conduct the heat generated by the single full-spectrum LED light source.

3. The sunlight simulation device as described in claim 2, characterized in that, The single full-spectrum LED light source includes an LED light-emitting component; The LED light-emitting component integrates multiple LED chips for emitting light signals of different wavelengths.

4. The sunlight simulation device as described in claim 2, characterized in that, The solar simulation device also includes an air intake structure; The air intake structure includes multiple air intake fans mounted around the light source frame; The intake fan is used to generate an intake airflow to bring outside air into the modular light source.

5. The sunlight simulation device as described in claim 2, characterized in that, The number of reflectors is four; The four reflectors are arranged in a rectangular array on the reflector frame and correspond to the light emission positions of the multiple modular light sources within the light source frame. The four reflectors are used to converge and integrate the first light source signals from each of the modular light sources to emit a second light source signal for simulating the solar spectrum.

6. The sunlight simulation device as described in claim 2, characterized in that, The solar simulation device also includes a lens structure; The lens structure is disposed inside the reflector frame and includes at least one lens for directional control and collimation of the first light source signal.

7. The sunlight simulation device as described in claim 2, characterized in that, The modular light sources are detachably fixed within the light source frame.

8. The sunlight simulation device as described in claim 6, characterized in that, The first light source signal emitted by the plurality of modular light sources, after passing through the reflector and / or the lens structure, forms a second light source signal that covers the 350nm to 1100nm band of the AM1.5G standard solar spectrum.

9. The sunlight simulation device as described in claim 8, characterized in that, The band has a Class A spectral matching degree.

10. A battery testing system, characterized in that, Includes battery clamps, photovoltaic cells, and a solar simulation device as described in any one of claims 1 to 9; The battery clamp is used to hold the photovoltaic cell, and the solar simulation device emits a second light source signal to simulate the solar spectrum in order to test the photovoltaic cell.

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