Self-cleaning photovoltaic module
By setting capillary drainage channels on the laminate of photovoltaic modules, combined with frame designs with and without an A-side, the problems of water and dust accumulation in photovoltaic modules are solved, achieving a self-cleaning effect for the modules and improving power generation efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-03
AI Technical Summary
Existing photovoltaic modules without an A-side frame design are not effective at preventing water and dust accumulation, resulting in reduced power generation efficiency and potential safety hazards.
Multiple capillary drainage channels are set on the laminate of the photovoltaic module, and combined with the design of the A-side without and with the A-side frame, the combination of capillary drainage channels enables the rapid guidance and removal of water stains and dust.
It effectively prevents water stains and dust from accumulating on the surface of photovoltaic modules, improves the self-cleaning ability of the modules, enhances the anti-water and anti-dust effects, and improves power generation efficiency and safety.
Smart Images
Figure CN223967834U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a self-cleaning photovoltaic module. Background Technology
[0002] With the rapid development and application of solar energy technology, photovoltaic (PV) modules, as photoelectric conversion devices, are widely used in the solar power generation industry. A PV module typically consists of a surrounding mounting frame, and solar cells and other protective materials installed inside the frame. However, during installation, because the battery laminates are enclosed by the frame, water and dust easily accumulate on the upper surface of the PV module. This water and dust accumulation cannot be quickly and effectively removed, which not only reduces the effective power generation area of the PV module but may also obstruct the solar cells, causing current mismatch in the cells and leading to hot spots, posing a significant safety hazard to the actual operation of the PV module.
[0003] like Figure 1 As shown, when water accumulates on the surface of a photovoltaic module, due to surface tension, water stains tend to remain on the glass surface, especially in photovoltaic modules without an A-side frame. Water stains may remain at the edge of the glass without an A-side and may be blown back onto the glass surface by the wind. After the water dries, as... Figure 2 As shown, dust easily adheres to the glass surface, affecting the power generation efficiency of photovoltaic modules.
[0004] While existing components without an A-side can prevent water and dust accumulation to some extent, they cannot completely prevent water and dust accumulation in low-volume rainfall conditions. Furthermore, while auxiliary water-guiding clips can effectively drain water, their high cost makes them unsuitable for large-scale use. Utility Model Content
[0005] Based on the above analysis, the present invention aims to provide a self-cleaning photovoltaic module to solve the problem that the lack of an A-side frame makes the photovoltaic module less effective at preventing water and dust accumulation.
[0006] On one hand, this utility model provides a self-cleaning photovoltaic module, including a laminate and a combined frame, wherein the combined frame is used to cover the edge of the laminate; the combined frame includes a frame without an A-side; a first capillary drainage channel is provided on the upper surface of the laminate near the edge of the frame without an A-side and the first capillary drainage channel extends in a direction perpendicular to the frame without an A-side; the frame without an A-side includes a first side plate perpendicular to the upper surface of the laminate, and a plurality of second capillary drainage channels are provided on the side of the first side plate, the second capillary drainage channels extending from the top to the bottom of the side of the first side plate.
[0007] Furthermore, a third capillary drainage channel is provided on the top of the first side panel without an A-side frame, and the third capillary drainage channel extends in the same direction as the first capillary drainage channel.
[0008] Furthermore, the composite frame also includes a first sealant unit, which is disposed between the contact surface of the frame without side A and the laminate.
[0009] Furthermore, a fourth capillary drainage channel is provided on the top of the first sealant unit, and the fourth capillary drainage channel corresponds one-to-one with the first capillary drainage channel.
[0010] Furthermore, the combined frame also includes an A-side frame, which includes an upper lip, a lower lip, a first side panel, a second side panel, and a bottom panel.
[0011] Furthermore, the upper lip, lower lip, and first side plate together form a laminate mounting groove; the lower lip, first side plate, second side plate, and bottom plate together form a corner code cavity.
[0012] Furthermore, a plurality of fifth capillary drainage channels are provided on the outer surface of the first side plate with the A-side frame located on both sides of the laminate, and the fifth capillary drainage channels extend along the length direction of the A-side frame.
[0013] Furthermore, the frameless A-side includes a lower lip, a first side panel, a second side panel, and a bottom panel.
[0014] Furthermore, the laminate includes, from top to bottom, a cover glass, a front encapsulating film, a solar cell, a rear encapsulating film, and a back sheet.
[0015] Furthermore, the projection of the first capillary drainage channel on the back plate does not overlap with the projection of the solar cell on the back plate.
[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:
[0017] (1) In this utility model, multiple first capillary drainage channels are provided on the upper surface of the laminate, and multiple second capillary drainage channels are provided on the first side plate without A-side frame. First, the surface water stains are guided to the edge of the laminate as much as possible through the first capillary drainage channels. Then, the water stains at the bottom edge of the laminate are effectively guided to the bottom of the first side plate without A-side frame through the second capillary drainage channels, preventing water stains from stagnating on the glass surface of the photovoltaic module. This can further improve the anti-water accumulation and anti-dust accumulation effect of the self-cleaning photovoltaic module.
[0018] (2) By setting multiple third capillary drainage channels on the top of the first side plate without A-side frame, the present invention enables the accumulated water to be guided to the edge of the laminate surface through the first capillary drainage channel and then to the entrance of the second capillary drainage channel more quickly.
[0019] (3) By setting a fourth capillary drainage channel at the top of the first sealant unit between the A-side frame and the contact surface of the laminate, the present invention enables the accumulated water to be guided to the edge of the laminate surface through the first capillary drainage channel and then to the entrance of the third capillary drainage channel more quickly.
[0020] (4) By setting multiple fifth capillary drainage channels on the outer side of the first side plate with A-side frame on both sides of the laminate, the water accumulated on the sides of the first and second frames on both sides of the photovoltaic module can flow downward along the fifth capillary drainage channels, reducing the accumulation of rainwater on the upper surface of the cover glass.
[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description
[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.
[0023] Figure 1 A schematic diagram illustrating the accumulation of water and dust due to surface tension in photovoltaic modules with or without an A-side frame in existing technologies.
[0024] Figure 2 A schematic diagram of dust accumulation on a photovoltaic module with or without an A-side frame in the prior art after water stains have dried.
[0025] Figure 3 This is a schematic diagram of the structure of the self-cleaning photovoltaic module of this utility model;
[0026] Figure 4 This is a schematic diagram of the structure of the laminate in the self-cleaning photovoltaic module of this utility model;
[0027] Figure 5 This is a schematic diagram of the cover glass in the self-cleaning photovoltaic module of this utility model;
[0028] Figure 6This is a side view of the cover glass in the self-cleaning photovoltaic module of the present invention, showing the side with the first capillary drainage channel.
[0029] Figure 7 This is a cross-sectional schematic diagram of the present invention without a frame on side A;
[0030] Figure 8 This is a schematic diagram of the structure of the present invention without a frame on side A;
[0031] Figure 9 This is a schematic diagram of the combination of the frameless A-side and the laminate of this utility model;
[0032] Figure 10 This is a cross-sectional schematic diagram of the present invention with a frame on side A;
[0033] Figure 11 This is a schematic diagram of the combination of the frame and the laminate of this utility model;
[0034] Figure 12 This is a schematic diagram of the water guiding mechanism of the self-cleaning photovoltaic module of this utility model.
[0035] Figure label:
[0036] 10-Laminated component; 11-Cover glass; 111-First capillary drainage channel; 12-Front adhesive film; 13-Solar cell; 14-Rear adhesive film; 15-Back panel; 21-First frame; 22-Second frame; 23-Third frame; 24-Fourth frame; 201-Upper lip; 202, 202'-Lower lip; 203, 203'-First side panel; 204, 204'-Laminated component mounting groove; 205, 205'-Second side panel; 206, 206'-Bottom plate; 207, 207'-Corner code cavity; 241-Second capillary drainage channel; 30-Sealant; 40-Corner code. Detailed Implementation
[0037] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.
[0038] Example 1
[0039] This utility model is as follows Figure 3 As shown, a self-cleaning photovoltaic module is disclosed.
[0040] The self-cleaning photovoltaic module includes a laminate 10 and a composite frame, the composite frame being used to cover the edges of the laminate 10.
[0041] The structure of the laminate 10 is as follows: Figure 4As shown. The laminate 10 includes, from top to bottom, a cover glass 11, a front encapsulating film 12, solar cells 13, a rear encapsulating film 14, and a backsheet 15, which are pressed together as a single unit. The solar cells 13 are electrically connected to each other via solder strips and busbars.
[0042] The cover glass 11 is either tempered photovoltaic glass or semi-tempered glass. The front encapsulating film 12 and the back encapsulating film 14 can be either EVA film (ethylene-vinyl acetate copolymer film), POE film (polyolefin elastomer film), EVA / POE laminated film, EVA / POE / EVA laminated film, or POE / EVA / POE laminated film. The backsheet 15 is photovoltaic glass or a photovoltaic backsheet. In some embodiments, the photovoltaic backsheet has a multilayer laminated structure, including at least an insulating functional layer and a weather-resistant functional layer. The insulating functional layer is polyethylene terephthalate (PET), modified polyethylene terephthalate (PET), or a multilayer film containing polyethylene terephthalate (PET), and the weather-resistant functional layer is a PVF film layer, a PVDF film layer, or an ETFE film layer.
[0043] See Figure 3 The combined border includes: a first border 21 and a second border 22 set along a first direction, and a third border 23 and a fourth border 24 set along a second direction.
[0044] In this utility model, side A of the frame refers to the side where the frame covers the surface of the laminate 10 after the frame and the laminate 10 are assembled together.
[0045] Among them, the first border 21, the second border 22, and the third border 23 are all borders with side A, and the cross-section of the border with side A is as follows. Figure 10 As shown, the frame of side A includes an upper lip 201, a lower lip 202, a first side panel 203, a second side panel 205, and a bottom panel 206.
[0046] The upper lip 201, lower lip 202, and first side plate 203 together form a laminate mounting groove 204. The lower lip 202, first side plate 203, second side plate 205, and bottom plate 206 together form a corner bracket cavity 207.
[0047] The assembly relationship between the A-side frame and the laminate 10 is as follows: Figure 11 As shown, the end of the laminate 10 is inserted into the laminate mounting groove 204 with the A-side frame, and a sealant 30 is provided between the contact surface of the A-side frame and the laminate 10.
[0048] The fourth border 24 is a border without side A, and its cross-section is as follows: Figure 7 As shown, the overall structure is as follows Figure 8As shown, it includes a lower lip 202', a first side plate 203', a second side plate 205', and a bottom plate 206'. The lower lip 202' and the first side plate 203' together form a laminate mounting groove 204', and the lower lip 202', the first side plate 203', the second side plate 205', and the bottom plate 206' together form a corner bracket cavity 207'.
[0049] The assembly relationship between the A-side frame and the laminate 10 is as follows: Figure 9 As shown, the end of the laminate 10 is inserted into the laminate mounting groove 204' without the A-side frame. A sealant 30 is provided between the contact surface between the laminate without the A-side frame and the laminate 10. After the sealant 30 solidifies, it forms the first sealant unit.
[0050] In this embodiment, see Figure 3 The first border 21, the second border 22, the third border 23, and the fourth border 24 are connected together by corner brackets 40 to jointly support the laminate 10.
[0051] To further improve the waterproof and dustproof performance of photovoltaic modules, see [link / reference]. Figure 3 , Figure 5 as well as Figure 6 A plurality of first capillary drainage channels 111 are provided on the upper surface of the laminate 10. The first capillary drainage channels 111 are located on the edge of the laminate adjacent to the side without A-side frame and extend in a direction perpendicular to the side without A-side frame. The first side plate 203' without A-side frame is perpendicular to the upper surface of the laminate 10. A plurality of second capillary drainage channels 241 are provided on the side of the first side plate 203' without A-side frame. The second capillary drainage channels 241 extend from the top to the bottom of the side of the first side plate 203' without A-side frame.
[0052] Specifically, the first capillary drainage channel 111 is disposed on the upper surface of the cover glass 11 near the edge of the side without the A-side frame. At the same time, it is necessary to ensure that the projection of the first capillary drainage channel 111 on the back sheet 15 does not overlap with the projection of the solar cell 13 on the back sheet 15, so as to avoid affecting the normal operation of the photovoltaic module.
[0053] See Figure 5 and Figure 6 To ensure effective drainage without compromising the strength of the laminate 10, the width W1 of the first capillary drainage channel 111 is 0.2mm to 1mm, the depth H1 is 0.2mm to 1mm, and the gap between two adjacent first capillary drainage channels 111 is 0.2mm to 1mm. To avoid affecting the normal operation of the laminate 10, the length L1 of the first capillary drainage channel 111 is within the range of 5mm to 15mm. Preferably, the first capillary drainage channels 111 are arranged parallel to each other and evenly distributed.
[0054] The width W2 of the second capillary drainage channel 241 is 0.2mm to 0.5mm, and the depth H2 is 0.2mm to 0.5mm; the gap between two adjacent second capillary drainage channels 241 is 0.2mm to 0.5mm. This arrangement does not affect the strength of the frame without A-side, and at the same time can quickly guide water to the bottom of the first side plate 203'.
[0055] In some preferred embodiments, the top of the first side panel 203' without an A-side frame is provided with a plurality of third capillary drainage channels (not shown in the figure), the third capillary drainage channels extending in the same direction as the first capillary drainage channel 111. Preferably, the width, depth, and gap of the third capillary drainage channel are equal to those of the second capillary drainage channel 241. This arrangement allows water, after being guided to the bottom edge of the laminate 10 through the first capillary drainage channel 111, to be guided more quickly to the entrance of the second capillary drainage channel 241.
[0056] Furthermore, a fourth capillary drainage channel is provided on the top of the first sealant unit located between the contact surface between the A-side frame and the laminate 10. The fourth capillary drainage channel is provided in a one-to-one correspondence with the first capillary drainage channel 111. Preferably, the width, depth, and gap of the fourth capillary drainage channel and the first capillary drainage channel 111 are equal, so that after the accumulated water is guided to the bottom edge of the laminate 10 through the first capillary drainage channel 111, it is guided more quickly to the entrance of the third capillary drainage channel.
[0057] In some preferred embodiments, a plurality of fifth capillary drainage channels are provided on the outer surfaces of the first side plates 203 with A-side frames located on both sides of the laminate 10. The fifth capillary drainage channels extend along the length of the A-side frames. This arrangement allows water accumulated on the sides of the first frame 21 and the second frame 22 located on both sides of the photovoltaic module to flow downwards along the fifth capillary drainage channels. Preferably, the width, depth, and gap of the fifth capillary drainage channels are equal to those of the second capillary drainage channels 241.
[0058] Compared with existing technologies, such as Figure 12 As shown, the self-cleaning photovoltaic module provided in this embodiment can guide surface water stains to the edge of the cover glass 11 as much as possible through the first capillary drainage channel 111 set on the upper surface of the cover glass 11, and then effectively guide water stains at the bottom edge of the cover glass 11 to the bottom of the first side plate 203' without the A-side frame through multiple second capillary drainage channels set on the first side plate without the A-side frame, preventing water stains at the bottom of the photovoltaic module from remaining on the glass surface, which can further improve the anti-water accumulation and anti-dust accumulation effect of the self-cleaning photovoltaic module.
[0059] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A self-cleaning photovoltaic module, comprising a laminate and a composite frame, the composite frame being used to cover the edges of the laminate; the composite frame includes a frame without an A-side; characterized in that, A first capillary drainage channel is provided on the upper surface of the laminate near the edge of the frameless A-side, and the first capillary drainage channel extends in a direction perpendicular to the frameless A-side. The frameless A-side includes a first side plate perpendicular to the upper surface of the laminate, and the side of the first side plate is provided with a plurality of second capillary drainage channels extending from the top to the bottom of the side of the first side plate.
2. The self-cleaning photovoltaic module according to claim 1, characterized in that, The top of the first side panel without an A-side frame is provided with a third capillary drainage channel, which extends in the same direction as the first capillary drainage channel.
3. The self-cleaning photovoltaic module according to claim 1 or 2, characterized in that, The combined frame also includes a first sealant unit, which is disposed between the contact surface of the frame without side A and the laminate.
4. The self-cleaning photovoltaic module according to claim 3, characterized in that, The top of the first sealant unit is provided with a fourth capillary drainage channel, which corresponds one-to-one with the first capillary drainage channel.
5. The self-cleaning photovoltaic module according to claim 1, characterized in that, The combined frame also includes an A-side frame, which includes an upper lip, a lower lip, a first side panel, a second side panel, and a bottom panel.
6. The self-cleaning photovoltaic module according to claim 5, characterized in that, The upper lip, lower lip, and first side plate together form a laminate mounting groove; the lower lip, first side plate, second side plate, and bottom plate together form a corner code cavity.
7. The self-cleaning photovoltaic module according to claim 5 or 6, characterized in that, Multiple fifth capillary drainage channels are provided on the outer surface of the first side plate with A-side frame located on both sides of the laminate, and the fifth capillary drainage channels extend along the length direction of the A-side frame.
8. The self-cleaning photovoltaic module according to claim 1, characterized in that, The frameless A-side includes a lower lip, a first side panel, a second side panel, and a bottom panel.
9. The self-cleaning photovoltaic module according to claim 1, characterized in that, The laminate includes, from top to bottom, a cover glass, a front encapsulating film, a solar cell, a rear encapsulating film, and a back sheet.
10. The self-cleaning photovoltaic module according to claim 9, characterized in that, The projection of the first capillary drainage channel on the back plate does not overlap with the projection of the solar cell on the back plate.