Light photovoltaic module structure

Abstract

The utility model relates to the technical field of photovoltaic modules, in particular to a light photovoltaic module structure. Comprising a light U-shaped frame and a laminated part, the laminated piece is mounted on the light U-shaped frame; wherein the laminated piece comprises a front plate, a front adhesive film layer, a battery array, a rear adhesive film layer and a back plate which are sequentially arranged from top to bottom; the front plate is made of ultra-thin tempered glass with the thickness of 0.8-1.6 mm, and the ultra-thin tempered glass is coated with a silicon dioxide anti-reflection coating; both the front adhesive film layer and the rear adhesive film layer are resin films with the thickness of 0.2-1.0 mm, and the resin films are made of EVA (ethylene vinyl acetate), EPE (expandable polyethylene), POE (polyolefin elastomer) or PVB (polyvinyl butyral) materials. Compared with the traditional photovoltaic glass, the thickness of the photovoltaic module is reduced by 2 / 3, the light transmittance of the module is higher, and the power generation power of the photovoltaic module is increased; the weight of the light assembly is only about 5 kg / m < 2 > and is reduced by about 70% compared with a traditional assembly, and therefore the roof environment with the low load can be met, the pressure on the roof structure is reduced, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a lightweight photovoltaic component structure. Background Art

[0002] At present, my country's photovoltaic manufacturing and photovoltaic power generation scale are both ranked first in the world. According to the 2023 national power industry statistics released at the beginning of the year, by the end of 2023, my country's solar power generation installed capacity will exceed 610 GW, officially surpassing the installed capacity of hydropower of about 420 GW, becoming the second largest power source in the country, and its position in the power energy structure will be further improved. Among them, the photovoltaic module body is a relatively important power generation unit in the photovoltaic system. The traditional structure and materials of conventional photovoltaic modules can no longer meet the needs of many special scenarios.

[0003] Conventional photovoltaic modules mainly include tempered glass, front film layer, battery cell, rear film layer, back sheet, junction box and aluminum frame around the structure. The module weight is 15kg / m 2 The weight of the module itself limits the scope of application, especially in projects such as roofs with insufficient load, which cannot meet the actual installation requirements. In addition, because 70% of the weight of the main materials of photovoltaic modules comes from glass and frames. The heavy weight of conventional modules makes transportation and installation very troublesome. Therefore, it is urgent to develop a photovoltaic module that is both light in weight and easy to install and transport. Utility Model Content

[0004] The purpose of this utility model is to provide a lightweight photovoltaic module structure, which is 2 / 3 thinner than traditional photovoltaic glass, has a higher light transmittance, and increases the power generation of the photovoltaic module; the weight of the lightweight module is only 5kg / m 2 It is about 70% lighter than traditional components, so it can meet the needs of roof environments with lower loads, reduce the pressure on the roof structure, and improve safety.

[0005] In order to solve the above technical problems, the utility model provides a lightweight photovoltaic module structure, comprising: a lightweight U-shaped frame and a laminate; the laminate is installed on the lightweight U-shaped frame;

[0006] The laminate comprises a front plate, a front film layer, a battery array, a rear film layer and a back plate arranged in sequence from top to bottom;

[0007] The thickness of the lightweight U-shaped frame is 3 to 6 mm, and the thickness of the side wall of the U-shaped cavity is 0.3 to 1.5 mm;

[0008] The front plate is an ultra-thin tempered glass with a thickness of 0.8 to 1.6 mm, and the ultra-thin tempered glass is coated with a silicon dioxide anti-reflection coating;

[0009] The front adhesive film layer and the back adhesive film layer are both resin films with a thickness of 0.2-1.0 mm, and the resin films are made of EVA, EPE, POE or PVB material.

[0010] Preferably, the top wall of the lightweight U-shaped frame is arranged to be inclined downward from the outside to the inside, and the bottom wall inner wall of the lightweight U-shaped frame also includes a plurality of linear grooves, so that an anti-slip protrusion is formed between two adjacent grooves.

[0011] Preferably, the lightweight U-shaped frame is made of aluminum alloy or a composite layer composed of a polyurethane layer and a glass fiber plastic layer arranged in sequence; the anti-slip protrusions are strip blocks.

[0012] Preferably, the battery array is formed by splicing a plurality of battery string arrays; and the battery string is formed by connecting a plurality of battery cells in series.

[0013] Preferably, the battery cell is a square size of 182mm or 210mm or other special rectangular size; the battery cell includes but is not limited to PERC, Topcon or HJT battery.

[0014] Preferably, the back panel is made of CPC, KPC, KPF or TPC material; or is a fluorine-containing reinforced plate, which includes a fluorine-containing layer and a fiber reinforced layer arranged in sequence; or is ultra-thin tempered glass, which is consistent with the material and thickness of the front panel.

[0015] Preferably, it further comprises a junction box, wherein the junction box is fixedly arranged on the lower surface of the back plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Light weight: The weight of the lightweight component is only 5kg / m 2 It is about 70% lighter than traditional components, so it can meet the needs of roof environments with lower loads, reduce the pressure on the roof structure, and improve safety.

[0018] 2. High strength and few hidden cracks: Lightweight components are not flexible components in the traditional sense. The front panel material is ultra-thin tempered glass and the whole is a hard plate. It can achieve high strength and durability and performs well when subjected to impact, pressure and vibration. The risk of hidden cracks in crystalline silicon cells is significantly lower than other lightweight components on the market.

[0019] 3. High power: The front surface uses high-transmittance ultra-thin tempered glass, which is 2 / 3 thinner than traditional photovoltaic glass. The light transmittance of the component is higher, which increases the power generation capacity of the photovoltaic component.

[0020] 4. Fast construction: Reduce reinforcement costs. Lightweight components are 70% lighter than traditional components. Some roofs do not need to be reinforced as long as the load meets the requirements of lightweight components, which directly saves construction costs; reduces the time cost of structural reinforcement, greatly improves construction efficiency, and shortens the construction period.

[0021] 5. High temperature and corrosion resistance: The lightweight components adopt the combination of ultra-thin tempered glass and fireproof backboard, which can resist high temperature and corrosion and extend the service life of the roof.

[0022] 6. Ultra-thin frame design reduces the accumulation of rainwater and mud, thus achieving the effect of no need for cleaning and more power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the lightweight photovoltaic component structure of the utility model.

[0024] Figure 2 It is a structural schematic diagram of a lightweight U-shaped frame of the utility model.

[0025] Figure 3 The utility model is a flow chart of the production process of the lightweight photovoltaic module structure.

[0026] In the figure: 1-lightweight U-shaped frame, 11-anti-slip protrusions, 2-front plate, 3-front adhesive film layer, 4-battery array, 5-rear adhesive film layer, 6-back plate, 7-junction box. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0028] Example 1

[0029] like Figures 1-2 As shown, the embodiment of the utility model provides a lightweight photovoltaic module structure, which is specifically used in projects with low loads. The product has the advantages of light weight, high strength, and simple construction. It includes: a lightweight U-shaped frame 1 and a laminate; the laminate is installed on the lightweight U-shaped frame 1;

[0030] The laminate includes a front plate 2, a front adhesive film layer 3, a battery array 4, a rear adhesive film layer 5 and a back plate 6 arranged in sequence from top to bottom;

[0031] The thickness of the lightweight U-shaped frame 1 is 3 to 6 mm, and the thickness of the side wall of the U-shaped cavity is 0.3 to 1.5 mm;

[0032] The front panel 2 is an ultra-thin tempered glass with a thickness of 0.8 to 1.6 mm, and the ultra-thin tempered glass is coated with a silicon dioxide anti-reflection coating;

[0033] The front adhesive film layer 3 and the back adhesive film layer 5 are both resin films with a thickness of 0.2-1.0 mm. The resin films can be made of EVA, EPE, POE or PVB materials according to actual needs. After high-temperature lamination process, they play a role in bonding the front and back materials.

[0034] The top wall of the lightweight U-shaped frame 1 is tilted downward from the outside to the inside, and the bottom wall of the lightweight U-shaped frame 1 also includes a plurality of linear grooves, so that anti-slip protrusions 11 are formed between two adjacent grooves, which can enhance the abutment effect between the laminate and the lightweight U-shaped frame 1. The above frame structure is not limited to the U-shaped structure.

[0035] The light U-shaped frame 1 is made of aluminum alloy or a composite layer composed of a polyurethane layer and a glass fiber plastic layer arranged in sequence; the anti-slip protrusions 11 are strip-shaped blocks.

[0036] The battery array 4 is formed by connecting a plurality of battery strings; and a battery string is formed by connecting a plurality of battery cells in series.

[0037] The battery cell is a square size of 182mm or 210mm or other special rectangular size; the battery cell includes but is not limited to PERC, Topcon or HJT battery.

[0038] The back plate 6 is made of CPC, KPC, KPF or TPC material; or a fluorine-containing reinforced plate, which includes a fluorine-containing layer and a fiber reinforced layer arranged in sequence; or an ultra-thin tempered glass, which is consistent with the material and thickness of the front plate 2.

[0039] It also includes a junction box 7 which is fixedly arranged on the lower surface of the back plate 6 .

[0040] Example 2

[0041] like Figure 3 As shown, the embodiment of the utility model provides a production process of a lightweight photovoltaic module structure, comprising the following steps:

[0042] Step S1: Pre-production preparation: efficiency sorting and grade sorting of battery cells, and preparation of main materials for component production;

[0043] Step S2: welding; connecting the multiple battery cells with interconnecting strips through string welding equipment, thereby connecting the multiple battery cells in series to form a battery string;

[0044] Step S3: stacking; after arranging a plurality of battery strings, they are spliced ​​into a battery matrix 4 with a bus bar, and the back plate 6, the rear film layer 5, the battery matrix 4, the front film layer 3 and the ultra-thin tempered glass are laid one by one from bottom to top to form a laminate to be laminated;

[0045] Step S4: Inspection before lamination: With the help of personnel appearance inspection and EL inspection equipment, the appearance of the components to be laminated and the defects of each battery cell are inspected, unqualified components are selected for rework, and qualified components are retained for the lamination process;

[0046] Step S5: lamination; the laid laminate to be laminated flows into the laminator cavity, the vacuum in the laminate is extracted by vacuuming, and then the front film layer 3 and the rear film layer 5 are melted by heating and pressurizing, and the battery array 4, the ultra-thin tempered glass and the back plate 6 are bonded together, and the battery laminate flows out after lamination and cooling;

[0047] Step S6: framing or installing edge protection; installing by hand or framing equipment, using silica gel or double-sided tape to protect and fix the lightweight U-shaped frame 1 and the laminated parts around;

[0048] Step S7: installing the junction box 7; applying glue on the bottom surface of the junction box 7, passing the positive and negative electrode lead wires of the laminate through the electrode slots of the corresponding junction box 7, welding and bonding them firmly, and then covering the junction box 7 with AB potting glue;

[0049] Step S8: curing; placing the assembled lightweight U-shaped frame 1 and the junction box 7 in a curing room, curing the silicone in the lightweight U-shaped frame 1 and the silicone in the junction box 7;

[0050] Step S9: Component cleaning: Wipe the dirt and silicone on the glass surface, frame, and back panel of the component to ensure the cleanliness of the component, and polish the sharp corners around the frame to ensure the cleanliness and safety of the component;

[0051] Step S10: component testing: testing the electrical performance and safety performance of the components;

[0052] Step S11: Final test and final inspection: Detect the defects of the battery cells inside the component by EL inspection equipment, and then inspect the appearance of the component manually or with appearance inspection equipment;

[0053] Step S12: sorting the power level and quality level of the components according to comprehensive parameters such as component electrical performance, appearance, and cell defects, and then packing them separately for storage.

[0054] In summary, because 70% of the weight of the main materials of photovoltaic modules mainly comes from glass and frames, the technical problem solved by the utility model is to overcome the defects of the existing technology and provide a lightweight photovoltaic module, which can significantly reduce the overall weight of the module by reducing the thickness of the front surface glass and improving the frame structure design, thereby increasing the application range of photovoltaic modules and reducing transportation and installation costs.

[0055] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A lightweight photovoltaic module structure, characterized in that: include: A lightweight U-shaped frame and a laminate; the laminate is installed on the lightweight U-shaped frame; The laminate comprises a front plate, a front film layer, a battery array, a rear film layer and a back plate arranged in sequence from top to bottom; The thickness of the lightweight U-shaped frame is 3 to 6 mm, and the thickness of the side wall of the U-shaped cavity is 0.3 to 1.5 mm; The front plate is an ultra-thin tempered glass with a thickness of 0.8 to 1.6 mm, and the ultra-thin tempered glass is coated with a silicon dioxide anti-reflection coating; The front adhesive film layer and the back adhesive film layer are both resin films with a thickness of 0.2-1.0 mm, and the resin films are made of EVA, EPE, POE or PVB material.

2. A lightweight photovoltaic module structure as claimed in claim 1, characterized in that: The top wall of the lightweight U-shaped frame is inclined downward from the outside to the inside, and the bottom wall inner wall of the lightweight U-shaped frame also includes a plurality of linear grooves, so that anti-slip protrusions are formed between two adjacent grooves.

3. A lightweight photovoltaic module structure as claimed in claim 2, characterized in that: The lightweight U-shaped frame is made of aluminum alloy or a composite layer composed of a polyurethane layer and a glass fiber plastic layer arranged in sequence; the anti-slip protrusion is a strip block.

4. A lightweight photovoltaic module structure as claimed in claim 1, characterized in that: The battery array is formed by connecting a plurality of battery strings; and the battery string is formed by connecting a plurality of battery cells in series.

5. A lightweight photovoltaic module structure as claimed in claim 4, characterized in that: The battery cell is a square size of 182mm or 210mm or other rectangular size; the battery cell includes but is not limited to PERC, Topcon or HJT battery.

6. A lightweight photovoltaic module structure as claimed in claim 1, characterized in that: The back panel is made of CPC, KPC, KPF or TPC material; or a fluorine-containing reinforced plate, which includes a fluorine-containing layer and a fiber reinforced layer arranged in sequence; or an ultra-thin tempered glass, which is consistent with the material and thickness of the front panel.

7. A lightweight photovoltaic module structure as claimed in claim 1, characterized in that: It also includes a junction box, which is fixedly arranged on the lower surface of the back plate.

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