Light glass-based photovoltaic module

Abstract

The utility model discloses a light-weight glass-based photovoltaic module, which comprises a light-weight back frame and a photovoltaic power generation module, the light-weight back frame comprises a rectangular frame and an internal grating support, and the photovoltaic power generation module is positioned in the rectangular frame and is supported and fixed on the grating support. The photovoltaic power generation module comprises a back protection membrane, a lower packaging membrane, a photovoltaic battery pack string, a middle packaging membrane, a latticed glass cover plate, an upper packaging membrane and a front protection membrane which are fixedly connected in sequence from bottom to top. The grid-shaped glass cover plate comprises a grid-type fixing frame and ultra-thin glass plates packaged and fixed in grids of the grid-type fixing frame, each ultra-thin glass plate completely covers the position over one corresponding photovoltaic cell, and each photovoltaic cell of the photovoltaic cell pack string is located over one grid corresponding to the grid support. According to the utility model, the thickness of the glass-based cover plate is greatly reduced, so that the overall weight of the photovoltaic power generation device is reduced, and the shock resistance of the photovoltaic power generation device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a lightweight glass-based photovoltaic component. Background Art

[0002] Rooftop photovoltaic power stations and BAPV photovoltaic power stations installed on various roof surfaces have become quite popular. However, some idle roofs cannot be installed with conventional photovoltaic modules due to their insufficient design load margin. The safest solution is to reinforce the steel structure of the roof and then install conventional photovoltaic modules, but the cost of reinforcement is often high. The second way is to use a lightweight photovoltaic module that is lighter than a conventional photovoltaic module.

[0003] At present, the weight per square meter of lightweight photovoltaic modules on the market is generally between 3.2 and 7 kg / m 2 The realization of lightweighting is mainly to replace the glass cover of conventional photovoltaic modules with lightweight transparent polymer materials, and then add metal frames and back frames to lightweight photovoltaic modules according to installation requirements; lightweight photovoltaic modules without metal frames can reach 3.2kg / m 2 , lightweight photovoltaic modules with metal frames can reach 4-5kg / m 2 , conventional single-glass photovoltaic modules are about 10.5kg / m 2 , double glass components are about 12kg / m 2 The lightweight transparent polymer cover has poor impact resistance because the rigidity, strength and ability to resist hard impact of polymer materials are significantly lower than those of glass.

[0004] In order to further achieve the goal of lightweight photovoltaic modules, thinner glass plates are used, such as 1.6mm thick semi-tempered ultra-clear rolled glass. The unit square meter weight of semi-tempered ultra-clear rolled glass is 6kg / m 2 (frameless) and 7kg / m 2 (Framed). Even thinner glass, such as electronic glass with a thickness of 0.1 to 2 mm and bent glass with a thickness of 0.03 mm, is not suitable for photovoltaic modules because: (1) large-area ultra-thin glass has a high breakage rate and high production cost; (2) photovoltaic modules generally require rolled glass (one of the glass surfaces has a pattern), and the minimum thickness limit of rolled glass is 1.4 mm, and the lower limit of thickness that can be mass-produced is 1.6 mm; (3) large-area ultra-thin glass plates cannot be tempered (the lower limit of fully tempered is generally 3 mm, and the lower limit of semi-tempered is 1.6 mm). Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a lightweight glass-based photovoltaic component, which greatly reduces the thickness of the glass-based cover plate, thereby reducing the overall weight of the photovoltaic power generation device and improving the impact resistance of the photovoltaic power generation device.

[0006] The technical solution of the utility model is:

[0007] A lightweight glass-based photovoltaic module, comprising a lightweight back frame and a photovoltaic power generation module, wherein the lightweight back frame comprises a rectangular frame and a grid support, the grid support is fixed inside the rectangular frame, the horizontal height of the top of the grid support is lower than the horizontal height of the top of the rectangular frame, and the photovoltaic power generation module is located inside the rectangular frame and supported and fixed on the top of the grid support;

[0008] The photovoltaic power generation module includes a back protective film, a lower packaging film, a photovoltaic cell string, a middle packaging film, a grid-shaped glass cover, an upper packaging film and a front protective film fixedly connected in sequence from bottom to top. The photovoltaic cell string includes a plurality of photovoltaic cells arranged in a matrix, and the plurality of photovoltaic cells are electrically connected by wires to form a photovoltaic cell string. The grid-shaped glass cover includes a grid-type fixing frame and an ultra-thin glass plate packaged and fixed in each grid of the grid-type fixing frame. Each ultra-thin glass plate completely covers a corresponding photovoltaic cell, and each photovoltaic cell is located directly above a grid corresponding to the grid support.

[0009] The grid-type fixing frame is a grid-type elastic fixing frame, and a plurality of ultra-thin glass plates are bonded and fixed in each grid of the grid-type elastic fixing frame.

[0010] The rectangular frame and the grille support of the lightweight back frame are an integrated molding structure. The lightweight back frame is selected from a glass fiber reinforced composite back frame, a hollow glass bead reinforced composite back frame, a thin-walled aluminum alloy back frame or a thin-walled stainless steel back frame.

[0011] The back protection film is selected from TPT polyvinyl fluoride composite film, PVF polyvinyl fluoride film, PET polyethylene terephthalate film, ETFE ethylene-tetrafluoroethylene copolymer film or NFEP release film.

[0012] The front protective film sheet is selected from PET polyethylene terephthalate high-transmittance film sheet, ETFE ethylene-tetrafluoroethylene copolymer high-transmittance film sheet or NFEP high-transmittance release film sheet.

[0013] The lower packaging film, the middle packaging film and the upper packaging film are all made of EVA ethylene-vinyl acetate copolymer high-transmittance film, POE polyethylene octene co-elastic body high-transmittance film or PVB polyvinyl butyral high-transmittance film.

[0014] The ultra-thin glass plate is a chemically tempered ultra-white electronic glass plate, and the thickness of the ultra-thin glass plate is 0.12-1.1 mm.

[0015] The grid-type elastic fixing frame is selected from a grid-type silica gel fixing frame, a grid-type silicone adhesive fixing frame, a grid-type ethylene-vinyl acetate copolymer (EVA) fixing frame, a grid-type thermoplastic rubber (TPR) fixing frame, a grid-type thermoplastic polyurethane elastomer rubber (TPU) fixing frame or a grid-type polyurethane rubber (PU) fixing frame.

[0016] The bottom end of the photovoltaic power generation module is bonded and fixed to the top end of the grid support, and the side wall of the photovoltaic power generation module is bonded and fixed to the inner wall of the rectangular frame.

[0017] Advantages of the utility model:

[0018] (1) The glass cover of the present invention is a grid-shaped glass cover, which connects a plurality of small-sized ultra-thin glass plates through a grid-shaped fixing frame to form a complete glass cover structure. Since the ultra-thin glass plate is a small-area structure, the ultra-thin glass plate of the present invention uses electronic glass with a thickness of 0.12 to 1.1 mm, which achieves a more significant weight reduction than the existing photovoltaic components using rolled glass; and the grid-shaped glass cover is embedded between the middle packaging film and the upper packaging film, which can achieve a more optimized interface medium refractive index matching, and can greatly reduce the energy loss of interface optical reflection, so there is no need to use rolled glass with surface textures.

[0019] (2) The grid-shaped glass cover of the utility model covers the photovoltaic cell directly above, which can prevent water molecules from entering the surface of the photovoltaic cell. Compared with lightweight photovoltaic modules made of non-glass materials, it can help to extend the service life of lightweight photovoltaic modules.

[0020] (3) The ultra-thin glass plate of the utility model adopts an ultra-white electronic tempered glass plate with a thickness of 0.12 to 1.1 mm and chemically tempered, which can suppress the power attenuation problem of the PID component.

[0021] (4) Each ultra-thin glass plate of the utility model completely covers the top of a corresponding photovoltaic cell. Each photovoltaic cell is located above a grid corresponding to the grid support, thereby enhancing the local impact resistance of each photovoltaic cell. Multiple ultra-thin glass plates are connected by a grid-type elastic fixing frame, and combined with the damping characteristics of the interlayer material (three-layer packaging film) and the lightweight back frame, the impact resistance of the local area and the whole range of the photovoltaic module can be improved at the same time, achieving better mechanical properties than lightweight photovoltaic modules using non-glass materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of the utility model.

[0023] Figure 2 yes Figure 1 Enlarged view of part A in .

[0024] Figure 3 It is a cross-sectional view of the lightweight back frame of the utility model.

[0025] Figure 4 It is an exploded view of the utility model.

[0026] Figure markings: 1-lightweight back frame, 11-rectangular frame, 12-grid bracket, 2-photovoltaic power generation module, 21-back protective film, 22-lower packaging film, 23-photovoltaic battery string, 231-photovoltaic battery, 232-wire, 24-middle packaging film, 25-grid glass cover, 251-grid type elastic fixing frame, 252-ultra-thin glass plate, 26-upper packaging film, 27-front protective film. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See Figure 1-Figure 4 A lightweight glass-based photovoltaic module includes a lightweight back frame 1 and a photovoltaic power generation module 2. The lightweight back frame 1 includes a rectangular frame 11 and a grid support 12. The grid support 12 is fixed inside the rectangular frame 11. The horizontal height of the top of the grid support 12 is lower than the horizontal height of the top of the rectangular frame 11. The rectangular frame 11 and the grid support 12 of the lightweight back frame are an integrated molding structure.

[0029] The photovoltaic power generation module 2 is located inside the rectangular frame 11, the bottom end of the photovoltaic power generation module 2 is bonded and fixed to the top of the grid support 12, the side wall of the photovoltaic power generation module 2 is bonded and fixed to the inner wall of the rectangular frame 11, and the photovoltaic power generation module 2 includes a back protection film 21, a lower packaging film 22, a photovoltaic cell string 23, a middle packaging film 24, a grid-shaped glass cover 25, an upper packaging film 26 and a front protection film 27 which are fixedly connected from bottom to top, and the back protection film 21, the lower packaging film 22, the photovoltaic cell string 23, the middle packaging film 24, the grid-shaped glass cover 25, the upper packaging film 26 and the front protection film 27 are fixedly connected from bottom to top. The photovoltaic power generation module 2 is made by a pressing process, the photovoltaic cell string 23 includes a plurality of photovoltaic cells 231 arranged in a matrix, the plurality of photovoltaic cells 231 are electrically connected through a wire 232 to form the photovoltaic cell string 23, the lower packaging film 22 and the middle packaging film 24 completely cover and package the photovoltaic cell string 23, the grid-like glass cover 25 includes a grid-type elastic fixing frame 251 and an ultra-thin glass plate 252 packaged and fixed in each grid of the grid-type elastic fixing frame 251, each ultra-thin glass plate 252 completely covers a corresponding photovoltaic cell 231, and each photovoltaic cell 231 is located directly above a grid corresponding to the grid support 12.

[0030] Material description of this embodiment:

[0031] Front protective film: 0.1mm ETFE high-transmittance film;

[0032] Upper packaging film, middle packaging film and lower packaging film: 0.3mm EVA high-transmittance film;

[0033] Glass armor: 1.1mm ultra-clear chemically tempered glass + transparent silicone frame,

[0034] Photovoltaic cells: 0.13mm PERC crystalline silicon photovoltaic cells;

[0035] Back protective film: 0.3mm TPT film;

[0036] Lightweight back frame: 15mm frame depth, fiberglass.

[0037] Weight of this embodiment: Photovoltaic power generation module: 4kg / m 2 ; High-strength ultra-thin photovoltaic power generation device with lightweight back frame: 5.2kg / m 2 .

[0038] Comparative Example 1

[0039] The photovoltaic module adopts 1.6mm single-glass rolled glass and has no outer frame, and the weight is 6kg / m 2 .

[0040] Comparative Example 2

[0041] The photovoltaic module with an additional mechanical frame uses 1.6mm single-glass rolled glass and weighs 7kg / m.

[0042] Comparative Example 3

[0043] The photovoltaic module using 3.2mm single glass rolled glass weighs 10.45kg / m 2 .

[0044] Comparative Example 4

[0045] The photovoltaic module uses 2mm double-glazed rolled glass and weighs 12kg / m.

[0046] Compared with the existing photovoltaic modules with glass cover plates, the weight of the utility model is greatly reduced, and the damping characteristics of the interlayer material (three-layer packaging membrane) and the lightweight back frame can simultaneously improve the impact resistance of the local area and the whole range area of ​​the photovoltaic module.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightweight glass-based photovoltaic module, characterized in that: It includes a light back frame and a photovoltaic power generation module, wherein the light back frame includes a rectangular frame and a grid support, the grid support is fixed inside the rectangular frame, the horizontal height of the top of the grid support is lower than the horizontal height of the top of the rectangular frame, and the photovoltaic power generation module is located inside the rectangular frame and supported and fixed on the top of the grid support; The photovoltaic power generation module includes a back protective film, a lower packaging film, a photovoltaic cell string, a middle packaging film, a grid-shaped glass cover, an upper packaging film and a front protective film fixedly connected in sequence from bottom to top. The photovoltaic cell string includes a plurality of photovoltaic cells arranged in a matrix, and the plurality of photovoltaic cells are electrically connected by wires to form a photovoltaic cell string. The grid-shaped glass cover includes a grid-type fixing frame and an ultra-thin glass plate packaged and fixed in each grid of the grid-type fixing frame. Each ultra-thin glass plate completely covers a corresponding photovoltaic cell, and each photovoltaic cell is located directly above a grid corresponding to the grid support.

2. A lightweight glass-based photovoltaic module according to claim 1, characterized in that: The grid-type fixing frame is a grid-type elastic fixing frame, and a plurality of ultra-thin glass plates are bonded and fixed in each grid of the grid-type elastic fixing frame.

3. A lightweight glass-based photovoltaic module according to claim 1, characterized in that: The rectangular frame and the grille support of the lightweight back frame are an integrated molding structure. The lightweight back frame is selected from a glass fiber reinforced composite back frame, a hollow glass bead reinforced composite back frame, a thin-walled aluminum alloy back frame or a thin-walled stainless steel back frame.

4. A lightweight glass-based photovoltaic module according to claim 1, characterized in that: The back protection film is selected from TPT polyvinyl fluoride composite film, PVF polyvinyl fluoride film, PET polyethylene terephthalate film, ETFE ethylene-tetrafluoroethylene copolymer film or NFEP release film.

5. The lightweight glass-based photovoltaic module according to claim 1, characterized in that: The front protective film sheet is selected from PET polyethylene terephthalate high-transmittance film sheet, ETFE ethylene-tetrafluoroethylene copolymer high-transmittance film sheet or NFEP high-transmittance release film sheet.

6. A lightweight glass-based photovoltaic module according to claim 1, characterized in that: The lower packaging film, the middle packaging film and the upper packaging film are all made of EVA ethylene-vinyl acetate copolymer high-transmittance film, POE polyethylene octene co-elastic body high-transmittance film or PVB polyvinyl butyral high-transmittance film.

7. The lightweight glass-based photovoltaic module according to claim 1, characterized in that: The ultra-thin glass plate is a chemically tempered ultra-white electronic glass plate, and the thickness of the ultra-thin glass plate is 0.12-1.1 mm.

8. The lightweight glass-based photovoltaic module according to claim 2, characterized in that: The grid-type elastic fixing frame is selected from a grid-type silica gel fixing frame, a grid-type silicone adhesive fixing frame, a grid-type ethylene-vinyl acetate copolymer fixing frame, a grid-type thermoplastic rubber fixing frame, a grid-type thermoplastic polyurethane elastomer rubber fixing frame or a grid-type polyurethane rubber fixing frame.

9. The lightweight glass-based photovoltaic module according to claim 1, characterized in that: The bottom end of the photovoltaic power generation module is bonded and fixed to the top end of the grid support, and the side wall of the photovoltaic power generation module is bonded and fixed to the inner wall of the rectangular frame.

Images