Bendable photovoltaic power generation module with light guide structure

By using a multi-layered sheet-like composite structure with a light-guiding flexible photovoltaic power generation module, the problems of heavy weight, poor heat dissipation at high temperatures, high cost, and fragility of rigid glass-encapsulated photovoltaic power generation modules have been solved. This results in a lightweight, flexible, and safe photovoltaic power generation module suitable for various rooftop coverage applications.

WO2026156708A1PCT designated stage Publication Date: 2026-07-30CHEN HON WEN
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
CHEN HON WEN
Filing Date
2025-01-24
Publication Date
2026-07-30

AI Technical Summary

Technical Problem

Existing rigid glass-encapsulated photovoltaic power generation modules are heavy, have difficulty in heat dissipation at high temperatures, are costly, fragile, inflexible, and difficult to recycle. They cannot meet the requirements of impact resistance, lightweight, and flexibility, and have not effectively solved the problem of controlling light transmission and guidance.

Method used

A flexible photovoltaic power generation module with a light-guiding structure, employing a multi-layer sheet-like composite structure, includes a light-guiding substrate, an adhesive layer, photovoltaic power generation units, and a light-guiding top cover layer. It uses transparent or frosted materials, combined with micron-sized light-diffusing spherical particles and a metal mesh composite layer, to achieve control over the light transmission and guidance of the photovoltaic power generation units.

Benefits of technology

The resulting photovoltaic power generation module is lightweight, flexible, safe, and quick to set up, reducing costs and possessing high power generation characteristics. It is suitable for large-area coverage such as the translucent roofs of agricultural sheds and the top surfaces of fish-electricity co-generation devices.

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Abstract

A bendable photovoltaic power generation module (1) with a light guide structure. Said bendable photovoltaic power generation module (1) is of a multi-layer sheet-like combined structure, and the combined structure consists of a light guide substrate (2), a lower adhesive layer (3), an electrically-conductive connection wire group (4), a photovoltaic power generation unit (5), an upper adhesive layer (6) and a light guide upper cover layer (7) from bottom to top. Said bendable photovoltaic power generation module can be applied to light-transmitting roofs of agricultural greenhouses, top surfaces of fishery-photovoltaic symbiotic devices and top surfaces of various space structures, has the power generation function, and exhibits the characteristics of reduced cost, bendability, light weight, safety, high power, rapid arrangement and capability of generating power.
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Claims

1. A flexible photovoltaic power generation module with a light-guiding structure, characterized in that, The flexible photovoltaic power generation module with a light-guiding structure is a multi-layer sheet-like assembly structure. The structure, from bottom to top, consists of a light-guiding substrate, a lower adhesive layer, a connecting wire assembly, a photovoltaic power generation unit, an upper adhesive layer, and a light-guiding top cover layer. The overall structure includes: a light-guiding substrate, which may be a single-layer light-guiding substrate, a multi-chamber light-guiding substrate, or a metal mesh composite layer, using at least one of these methods; the upper surface of the light-guiding substrate is fixed to the connecting wire assembly and the photovoltaic power generation unit via the lower adhesive layer; the lower adhesive layer adheres the connecting wire assembly and the photovoltaic power generation unit to the light-guiding substrate; and a conductive connecting wire assembly is placed on the photovoltaic power generation unit. The lower part of the electrical unit is electrically connected, and the positive and negative terminals of the photovoltaic power generation module structure are led out; one or more photovoltaic power generation units, which are either single-sided or double-sided photovoltaic power generation units, are selected for use, and the photovoltaic power generation units are fixed on the upper surface of the light guide substrate according to the area ratio of the overall structure's light transmission requirements; an upper adhesive layer is used to adhere the photovoltaic power generation units to the lower part of the light guide cover layer; a light guide cover layer is used to fix the connecting wire group and the photovoltaic power generation units using the upper adhesive layer.

2. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The single-layer light guide substrate includes: adding 0.01 to 3.0% by weight of micron-sized light-diffusing spherical particles inside the light guide substrate, so that incident light is refracted and diffused to the back of the photovoltaic power generation unit.

3. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The multi-chamber light guide substrate comprises two or more independent chambers, which refract and diffuse incident light onto the back of the photovoltaic power generation unit.

4. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The other surface of the light guide substrate connected to the lower adhesive layer includes: no surface treatment, specular reflective surface treatment, and at least one treatment method is used.

5. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The metal mesh composite layer comprises: a metal mesh layer and a light guide plate layer, at least one composite layer.

6. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The light guide substrate and the light guide cover layer are made of materials including: polycarbonate (PC), polymethyl methacrylate (PMMA), ethylene tetrafluoroethylene copolymer (ETFE), polystyrene (PS), polyethylene (PE), polypropylene (PP), polyimide (PI), and polyethylene terephthalate (PET), and at least one of these materials is used.

7. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The photovoltaic power generation unit includes: polycrystalline silicon chip cell, monocrystalline silicon chip cell, passivated emitter and back cell (PERC), tunneling oxide passivated contact cell (TOPCon), heterostructure cell (HJT), perovskite solar cell, copper indium gallium selenide (CIGS) cell, and dye sensitized cell, one of which may be used.

8. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The upper and lower adhesive layers are made of at least one of the following materials: ethylene-vinyl acetate (EVA), polysiloxane, polymethyl methacrylate (PMMA), polyurethane (PU), or epoxy.

9. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The light guide cover layer, on the other surface connected to the adhesive layer, includes: a flat surface type, a surface type with conical micro-protrusions, and a surface type with semi-dome-shaped micro-protrusions, and is made using at least one of these surface types.

10. The flexible photovoltaic power generation module with a light-guiding structure according to claim 1, characterized in that, The upper and lower adhesive layers bond the light guide substrate, connecting wire assembly, photovoltaic power generation unit, and light guide cover layer into one unit, and include: normal pressing process, vacuum lamination process, roll-to-roll lamination, flat plate lamination, vacuum bag lamination, bath lamination, impregnation lamination, etc.