Lightweight crystalline silicon photovoltaic module
By using ultra-white patterned glass, polyethylene film, and back-mounted junction boxes to replace traditional aluminum frames, lightweight crystalline silicon photovoltaic modules are formed, solving the weight limitation problem, achieving lightweighting and cost reduction, and expanding the application range.
Patent Information
- Application Number
- CN202521748793.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-08-18
AI Technical Summary
Existing crystalline silicon photovoltaic modules are relatively heavy, which limits their application on building surfaces with weak load-bearing capacity.
It uses 3.0-3.5mm thick ultra-white patterned glass, 0.25-0.8mm polyethylene film and back-mounted junction box to replace the traditional aluminum frame, combined with EVA or POE layer to form a lightweight structure.
This has enabled the lightweighting of photovoltaic modules, enhanced their transmittance, reduced manufacturing costs, expanded their application range, and improved their convenience and transportability.
Smart Images
Figure CN224935998U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic industry technology, and more specifically to a lightweight crystalline silicon photovoltaic module. Background Technology
[0002] With the development of new energy sources, the photovoltaic industry has gradually become a part of people's lives. The ubiquitous solar streetlights and outdoor photovoltaic application products all demonstrate that photovoltaic application products have become an integral part of human life.
[0003] Currently, conventional crystalline silicon solar cell modules employ a structure using tempered glass, EVA, EVA solar cells, and a photovoltaic backsheet stacked together with an aluminum alloy frame, resulting in a module weight of approximately 20 kg. When installing photovoltaic panels on building surfaces, large-area installations are often required, and the weight of the modules themselves limits their application. In projects with weak load-bearing capacity, such as rooftops, many buildings are forced to abandon building-integrated photovoltaic (BIPV) solutions due to inadequate load-bearing design.
[0004] Therefore, there is an urgent need for a lightweight crystalline silicon photovoltaic module. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a lightweight crystalline silicon photovoltaic module to solve the problems in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.
[0007] The lightweight crystalline silicon photovoltaic module includes, from top to bottom, a front glass panel, a first encapsulation material layer, a cell layer, a second encapsulation material layer, and a photovoltaic backsheet. The front glass panel is 3.0-3.5mm thick ultra-white patterned glass; the first encapsulation material layer is a 0.25-0.8mm polyethylene film; and a junction box is provided on the photovoltaic backsheet, which is electrically connected to the cell layer.
[0008] To further optimize the technical solution, an anti-reflective film is coated on the ultra-white patterned glass.
[0009] To further optimize the technical solution, the second encapsulation material layer is an EVA or POE layer.
[0010] To further optimize the technical solution, the battery cell layer is composed of monocrystalline silicon battery cells or polycrystalline silicon battery cells.
[0011] To further optimize the technical solution, the battery cell is provided with a solder strip, and the battery cell is connected to the junction box through the solder strip.
[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.
[0013] This invention provides a lightweight crystalline silicon photovoltaic module. By using a high-strength, weather-resistant front glass panel instead of a traditional aluminum frame, the overall weight and thickness of the photovoltaic module are reduced without compromising the rigidity and mechanical load-bearing capacity of the silicon solar cell module. This invention offers advantages such as simple structure, light weight, thinness, ease of use, wide application range, convenient transportation, and low manufacturing cost. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model; The components are: 1. Anti-reflective coating, 2. Front glass, 3. First encapsulation material layer, 4. Cell layer, 5. Second encapsulation material layer, 6. Photovoltaic backsheet, and 7. Junction box. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0016] Lightweight crystalline silicon photovoltaic modules, combined with Figure 1 As shown, it includes an anti-reflective coating 1, a front glass panel 2, a first encapsulation material layer 3, a battery cell layer 4, a second encapsulation material layer 5, a photovoltaic backsheet 6, and a junction box 7.
[0017] The front glass panel 2, the first encapsulation material layer 3, the solar cell layer 4, the second encapsulation material layer 5, and the photovoltaic backsheet 6 are laid out sequentially from top to bottom. A junction box 7 is installed on the photovoltaic backsheet 6, which serves as the carrier for converting light energy into electrical energy and electrically connects the junction box 7 to the solar cells. The first encapsulation material layer 3 and the second encapsulation material layer 5 serve as adhesives, provide structural support, and also provide physical insulation.
[0018] The front panel glass is 3.0-3.5mm thick ultra-clear patterned glass, with an anti-reflective coating applied to it. This anti-reflective coating enhances the light transmittance of the photovoltaic ultra-clear patterned glass panel without reducing the rigidity and mechanical load capacity of the module, thereby increasing the module's power generation.
[0019] The first encapsulation material layer is a 0.25–0.8 mm thick polyethylene film. The polyolefin film can be thermosetting or thermoplastic. The polyolefin film effectively reduces water vapor transmission and increases the anti-PID performance of the silicon crystalline solar cell module, allowing for better encapsulation without edge sealing. It can replace the aluminum frame used in traditional methods, effectively reducing the weight, thickness, and manufacturing cost of the crystalline silicon solar cell module. This significantly expands the application range of crystalline silicon solar cell modules, improves their convenience and transportability, and solves the problems of heavy weight, thick thickness, and inconvenient transportation and use associated with crystalline silicon modules.
[0020] The second encapsulation material layer is an EVA or POE layer. During lamination, EVA or POE automatically flows into the edge area on the back of the photovoltaic module, thus forming a sealed structure at the edges and gaps. This second encapsulation material layer can block moisture penetration, has high reliability and strong impact resistance, and can greatly improve the service life of the module.
[0021] A junction box, which is a back-mounted type, is installed on the photovoltaic backsheet. The junction box is electrically connected to the cell layer and is mounted on the back of the cells. The cell layer consists of monocrystalline silicon or polycrystalline silicon cells. Solder strips are provided on the cells, and the cells are connected to the junction box via these solder strips.
[0022] In practical use, according to assembly requirements, the junction box 7 is connected to a suitable position on the back of the photovoltaic backsheet 6 using adhesive. For ease of installation, the dimensions of the front glass 2 and the photovoltaic backsheet 6 are ensured to be larger than the dimensions of the cell layer 4, the first encapsulation material layer 3, and the second encapsulation material layer 5. Polyethylene is uniformly coated onto the front glass, and welding strips are welded to the front of the cells. After welding, the cells are fixed to the front glass using polyolefin, ensuring the front of the cells faces the front glass. Then, the second encapsulation material layer is applied, and the photovoltaic backsheet is bonded together. The crystalline silicon photovoltaic module provided by this invention is a lightweight product, and the entire module can be clamped onto rooftops with weak load-bearing capacity, such as corrugated steel roofs, using clamps and jigs.
Claims
1. A lightweight crystalline silicon photovoltaic module, characterized in that: The photovoltaic backsheet includes, from top to bottom, a front glass panel (2), a first encapsulation material layer (3), a battery cell layer (4), a second encapsulation material layer (5), and a photovoltaic backsheet (6). The front glass panel (2) is 3.0-3.5mm thick ultra-white patterned glass; the first encapsulation material layer (3) is 0.25-0.8mm polyethylene film; a junction box (7) is provided on the photovoltaic backsheet (6), and the junction box (7) is electrically connected to the battery cell layer (4). The ultra-white patterned glass is coated with an anti-reflective film; the second encapsulation material layer (5) is an EVA or POE layer.
2. The lightweight crystalline silicon photovoltaic module according to claim 1, characterized in that: The battery cell layer (4) is composed of monocrystalline silicon battery cells or polycrystalline silicon battery cells.
3. The lightweight crystalline silicon photovoltaic module according to claim 1, characterized in that: The battery cell is provided with a solder strip, and the battery cell is connected to the junction box through the solder strip.