Shielding device for testing low-irradiation performance of photovoltaic module
By designing a shading device including a reel cylinder, a rotating shaft and a shading cloth, the problem of inconvenient shading cloth in the low-irradiation performance test of photovoltaic modules is solved, convenient operation and efficient shading are achieved, and the accuracy of the test is ensured.
Patent Information
- Application Number
- CN202420576009.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-25
AI Technical Summary
During the low-irradiation performance test of existing photovoltaic modules, the light-shading cloth is not convenient for shading, which is time-consuming and labor-intensive, and is prone to light leakage, which affects the accuracy of the test.
A shading device including a reel cylinder, a rotating shaft and a light shielding cloth is designed. One end of the light shielding cloth is connected to the reel, and a hook is provided at the other end. The automatic winding and stretching of the light shielding cloth is realized through an elastic reset member, which is suitable for the detection of different photovoltaic panels, and a through groove is opened on the light shielding cloth for the junction box to pass through.
It realizes convenient installation and automatic winding of the shading cloth, reduces operating time, improves the shading effect, and ensures the accuracy of low-irradiation performance testing of photovoltaic modules.
Smart Images
Figure CN222655120U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaic power generation, in particular to a shielding device for low-irradiation performance testing of a photovoltaic component. Background Art
[0002] Bifacial photovoltaic modules are devices that can generate current and voltage by receiving light on both the front and back sides. Bifacial modules made of bifacial cells can generate electricity on the back side, so their total power generation can be greatly increased compared to single-sided cell modules. Bifacial cell modules include double-glass bifacial modules and transparent backplane bifacial modules, as well as P-type PERC cell bifacial modules and N-type cell bifacial modules. Before the modules leave the factory, they need to be tested for low-irradiation performance according to IEC standards. According to IEC standards, when performing low-irradiation performance tests on bifacial modules, the other side of the module needs to be shielded with non-reflective materials.
[0003] The prior art has black cloth, black backboard or other shading materials pasted for blocking. During testing, it is necessary to paste black cloth or black backboard and other shading materials on the back of the component in advance, which is time-consuming and laborious. Moreover, when shielding the component, the frame part is easy to be not strictly shielded, which is easy to leak light, affecting the use effect and further affecting the accuracy of the power test. The prior art also has the design of using a retractable curtain wall to shield the photovoltaic panel, but they are all for fixed photovoltaic panels, that is, the photovoltaic panel needs to be fixed to the curtain wall shielding mechanism, which is mainly used to protect the photovoltaic panel and cannot be flexibly applied to the detection of different photovoltaic panels. In addition, the above-mentioned shading scheme does not take into account the wiring problem of the photovoltaic module junction box. The lead wires of the junction box often need to extend from the edge of the shading cloth, which will also affect the shading effect of the frame part of the photovoltaic module to a certain extent. Utility Model Content
[0004] In order to solve the technical problems in the prior art that when conducting low-irradiation performance tests on photovoltaic modules, it is inconvenient to use shading cloth to block the light, which is time-consuming and labor-intensive, and easy to leak light, the utility model provides a shielding device for low-irradiation performance testing of photovoltaic modules to solve the above problems.
[0005] The technical solution adopted by the utility model to solve its technical problems is: a shielding device for low-irradiation performance testing of photovoltaic components, including a reel drum, a rotating shaft and a shade cloth, the reel drum has a cavity inside, a reeling opening on the surface, and a first hook suitable for hanging on one end of a photovoltaic panel is provided on the outer surface of the reel drum; the rotating shaft is located in the cavity and is rotatably connected to the reel drum; one end of the shade cloth is connected to the reel, and the other end extends out of the reeling opening and is provided with a second hook suitable for hanging on the other end of the photovoltaic panel; an elastic reset member connected to the rotating shaft is provided on the reel drum, when the shade cloth is pulled out, the elastic reset member is tightened, and when the shade cloth is released, the shade cloth is reversely retracted under the action of the elastic reset member.
[0006] Furthermore, the elastic reset element is a torsion spring or a clockwork spring.
[0007] Furthermore, a fixing plate is fixedly provided on the reel drum, and the first hook is rotatably connected to the fixing plate.
[0008] Furthermore, a pull plate is fixedly provided at one end of the shading cloth away from the reel, and the second hook is rotatably provided on the pull plate. When the shading cloth is rolled up, the pull plate abuts against the outer surface of the rolling opening.
[0009] Furthermore, the shading cloth is provided with a through slot for the junction box of the photovoltaic panel to pass through, and the shading cloth is provided with a cloth bag covering the through slot and the junction box, and the cloth bag is provided with an outlet for the lead wires of the junction box to extend out.
[0010] Furthermore, an elastic band is provided at the outlet.
[0011] Furthermore, the outlet is arranged downward.
[0012] Furthermore, a zipper capable of reducing the opening of the through slot is provided at the through slot.
[0013] Furthermore, the first hook and the second hook are both provided with one or more groups.
[0014] Furthermore, the through slot extends in a vertical direction, and the starting end of the zipper is located below the through slot.
[0015] The beneficial effects of the utility model are:
[0016] (1) The utility model sets the shading cloth in a reel, so that the photovoltaic panel can be shaded by rolling and stretching. After rolling, the whole is in a cylindrical shape, which is convenient for storage. A first hook is provided on the reel, and a second hook is provided on the shading cloth. The utility model can be hung on different photovoltaic panels at will, which is convenient for performance testing, saves operation time, and improves the use effect.
[0017] (2) The utility model provides a through slot on the blackout cloth, so that the junction box can be exposed on the outside of the blackout cloth, which is convenient for wiring. In addition, the through slot is provided in the cloth bag, so that the through slot can be shielded to avoid light leakage, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0019] Figure 1 This is a schematic diagram of the structure of the shielding device for low-irradiation performance testing of photovoltaic modules according to the utility model;
[0020] Figure 2This is a schematic diagram of the structure of the shielding device for low-irradiation performance testing of photovoltaic modules of the utility model when the shading cloth is stored;
[0021] Figure 3 This is a schematic structural diagram of the shielding device for testing the low-irradiation performance of photovoltaic modules of the utility model when the shading cloth is unfolded;
[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0023] Figure 5 This is an axial cross-sectional view of the interior of the reel tube in the utility model;
[0024] Figure 6 It is a cross-sectional view of the inner end surface of the reel tube in the utility model.
[0025] In the figure, 1, reel tube; 101, fixing plate; 102, first hook; 103, cavity, 104, reeling opening; 2, shade cloth; 201, through slot; 202, cloth bag; 203, elastic band; 204, zipper; 3, pull plate; 301, second hook; 4, photovoltaic panel; 401, junction box, 5, rotating shaft, 6, elastic reset member, 7, outlet. DETAILED DESCRIPTION
[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0027] Embodiment 1
[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a shielding device for low-irradiation performance testing of photovoltaic modules includes a reel 1, a rotating shaft 5 and a shade cloth 2. The reel 1 has a cavity 103 inside and a reeling opening 104 on the surface. The outer surface of the reel 1 is provided with a first hook 102 suitable for hanging on one end of a photovoltaic panel 4; the rotating shaft 5 is located in the cavity 103 and is rotatably connected to the reel 1. The rotating shaft 5 is used to connect with the shade cloth 2 to play the role of reeling in the shade cloth 2. Both ends of the rotating shaft 5 can extend out of the reel 1. To prevent dust from entering, it is preferred that both ends of the reel 1 are closed, that is, the cavity 103 is connected to the outside only through the reeling opening 104.
[0029] One end of the shade cloth 2 is connected to the reel, and the other end extends out of the reeling opening 104 and is provided with a second hook 301 suitable for hanging on the other end of the photovoltaic panel 4; an elastic reset member 6 connected to the rotating shaft 5 is provided on the reel drum 1. When the shade cloth 2 is pulled out, the elastic reset member 6 is tightened. When the shade cloth 2 is released, the shade cloth 2 is retracted in the reverse direction under the action of the elastic reset member 6.
[0030] From the working state shown in the drawings of the utility model, it can be seen that the first hook 102 is hung on the upper end of the photovoltaic panel 4, and the second hook 301 is hung on the lower end of the photovoltaic panel 4. In fact, those skilled in the art should understand that when the reel 1 is set at the bottom, its shading function can also be achieved. At this time, the first hook 102 is hung on the lower end of the photovoltaic panel 4, and the second hook 301 is hung on the upper end of the photovoltaic panel 4. Since it is more convenient to pull out the shading cloth 2 downward, the first hook 102 is generally hung on the top of the photovoltaic panel 4.
[0031] Usage: hang the first hook 102 connected to the reel 1 on the top of the photovoltaic panel 4, then pull the shade cloth 2 out of the reel 1, so that the second hook 301 on the shade cloth 2 is hung on the bottom of the photovoltaic panel 4, and the shade cloth 2 can completely block the photovoltaic panel 4 (such as Figure 1 and Figure 3 As shown), after use, the second hook 301 is removed from the bottom of the photovoltaic panel 4, and the shaft 5 rotates in the opposite direction under the drive of the elastic reset member 6, and the shade cloth 2 can be automatically rolled up. After rolling up, all parts are hidden in the reel drum 1, and the shielding device forms a cylindrical structure (as shown in FIG. Figure 2 As shown), easy to store.
[0032] The utility model does not require power equipment, can be manually unfolded, and can also be automatically rolled up, and has low cost. Those skilled in the art should understand that the utility model can also use electric means to stretch and roll up the shade cloth 2. For example, when the photovoltaic panel 4 is large in size and is not convenient for manual operation, it can be powered by power equipment and only needs to be manually hung at both ends.
[0033] The elastic reset member 6 may be a torsion spring or a spring, and preferably a spring with higher tensile strength is used.
[0034] Installation of the first hook 102: A fixing plate 101 is fixedly provided on the reel drum 1, and the fixing plate 101 provides a horizontal installation surface for the first hook 102, and the first hook 102 is rotatably connected to the fixing plate 101. One or more first hooks 102 may be provided as preferred, and 2 to 6 first hooks 102 are provided. In this embodiment, two first hooks 102 are provided, and they are symmetrically arranged. The first hook 102 is rotatably arranged on the fixing plate 101, which is convenient for hanging the reel drum 1 on the photovoltaic panel 4 for use, and convenient for adjusting the hanging direction of the first hook 102 to improve the use effect.
[0035] Installation of the second hook 301: A pull plate 3 is fixedly provided at one end of the shade cloth 2 away from the reel, and the second hook 301 is rotatably provided on the pull plate 3. When the shade cloth 2 is rolled up, the pull plate 3 abuts against the outer surface of the rolling opening 104. Similar to the first hook 102, a plurality of second hooks 301 can be provided. The pull plate 3 facilitates the pulling out of the shade cloth 2 from the reel drum 1, and can also prevent the shade cloth 2 from being completely stored in the reel drum 1, which affects the use effect. Moreover, the rotational connection between the pull plate 3 and the second hook 301 facilitates the adjustment of the hanging direction of the second hook 301, thereby improving the use effect.
[0036] Embodiment 2
[0037] Based on the first embodiment, Figure 1 , Figure 3 and Figure 4 As shown, the shade cloth 2 is also provided with a through slot 201 for the junction box 401 of the photovoltaic panel 4 to pass through, and the shade cloth 2 is provided with a cloth bag 202 covering the through slot 201 and the junction box 401, and the cloth bag 202 is provided with an outlet 7 for the lead wires of the junction box 401 to extend out.
[0038] The junction box 401 can be exposed from the through slot 201 to the outside of the blackout cloth 2, which is convenient for wiring the junction box 401, and a cloth bag 202 for shielding the through slot 201 is fixedly provided on the blackout cloth 2. The through slot 201 is opened in the cloth bag 202, and the depth of the cloth bag 202 is greater than the length of the through slot 201. The through slot 201 can be shielded, light leakage is reduced, and the use effect is improved.
[0039] Through the improvement of this embodiment, the lead wires of the junction box 401 do not need to pass through the edge of the shading cloth 2 , and the shading cloth 2 fits the photovoltaic panel 4 more closely, thus avoiding light leakage at the frame of the photovoltaic panel 4 .
[0040] In order to avoid light leakage and improve the use effect, an elastic band 203 is preferably provided at the outlet 7. Figure 1 and Figure 4 An elastic band 203 is fixedly provided at the outlet 7 of the cloth bag 202. When in use, the outlet 7 can be contracted under the action of the elastic band 203 to avoid light leakage.
[0041] The outlet 7 of the cloth bag 202 is preferably arranged downward, which can reduce the light entering the cloth bag 202 and improve the shielding effect of the through slot 201.
[0042] In a further design, a zipper 204 is provided at the through slot 201 to reduce the opening of the through slot 201. The zipper 204 is convenient for controlling the opening size of the through slot 201, which can reduce light leakage and improve the use effect. The through slot 201 can extend in any direction as long as the junction box 401 can pass through. Generally, the length direction of the junction box 401 is arranged in the up-down direction, so the through slot 201 extends in the vertical direction accordingly. The starting end of the zipper 204 is located below the through slot 201. After the blackout cloth 2 is pulled down, the junction box 401 passes through the through slot 201. When the zipper 204 is pulled from the end close to the outlet 7 of the cloth bag 202 into the cloth bag 202, the through slot 201 can be closed.
[0043] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "vertical", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0044] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.
[0045] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A shielding device for low-irradiation performance testing of photovoltaic modules, characterized in that: include: A reel (1), wherein the reel (1) has a cavity (103) inside and a reeling opening (104) on its surface, and the outer surface of the reel (1) is provided with a first hook (102) suitable for hanging on one end of a photovoltaic panel (4); A rotating shaft (5), located in the cavity (103) and rotatably connected to the reel drum (1); A shade cloth (2), one end of the shade cloth (2) is connected to the reel, the other end of the shade cloth (2) extends out of the reeling opening (104) and is provided with a second hook (301) suitable for hanging on the other end of the photovoltaic panel (4); An elastic reset member (6) connected to the rotating shaft (5) is arranged on the reel drum (1); when the shade cloth (2) is pulled out, the elastic reset member (6) is tightened; when the shade cloth (2) is released, the shade cloth (2) is reversely retracted under the action of the elastic reset member (6).
2. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 1 is characterized in that: The elastic reset element (6) is a torsion spring or a spring.
3. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 1, characterized in that: A fixing plate (101) is fixedly arranged on the reel drum (1), and the first hook (102) is rotatably connected to the fixing plate (101).
4. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 1, characterized in that: A pull plate (3) is fixedly provided at one end of the shading cloth (2) away from the reel, and the second hook (301) is rotatably provided on the pull plate (3). When the shading cloth (2) is reeled in, the pull plate (3) abuts against the outer surface of the reeling opening (104).
5. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 1, characterized in that: The shade cloth (2) is also provided with a through slot (201) for a junction box (401) of the photovoltaic panel (4) to pass through, and the shade cloth (2) is provided with a cloth bag (202) covering the through slot (201) and the junction box (401), and the cloth bag (202) is provided with an outlet (7) for a lead wire of the junction box (401) to extend out.
6. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 5, characterized in that: An elastic band (203) is provided at the outlet (7).
7. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 5, characterized in that: The outlet (7) is arranged to face downward.
8. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 5, characterized in that: The through slot (201) is provided with a zipper (204) capable of reducing the opening of the through slot (201).
9. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 1, characterized in that: The first hook (102) and the second hook (301) are both provided with one or more groups.
10. The shielding device for low-irradiation performance testing of photovoltaic modules according to claim 8, characterized in that: The through slot (201) extends in a vertical direction, and the starting end of the zipper (204) is located below the through slot (201).