Photovoltaic module structure

Abstract

The utility model discloses a photovoltaic module structure, which comprises a multilayer structure arranged along the thickness direction and a frame surrounding the periphery of the multilayer structure, the multi-layer structure comprises a light-transmitting element, a front packaging layer, a plurality of solar cells which are arranged at intervals, a rear packaging layer and a protection element which are arranged in sequence, and the periphery of the multi-layer structure is provided with an edge sealing insulating rubber strip used for increasing the creepage distance between the multi-layer structure and the frame; the edge sealing insulation rubber strip covers the bottom of the protection element from the top of the light-transmitting element in the thickness direction of the multi-layer structure. The photovoltaic module provided by the utility model is a special full-screen photovoltaic module, the front surface of the module is free of a frame, the insulation water-blocking adhesive tape is attached to the periphery of the module, the creepage distance of the module is increased, the increase of the creepage distance can enable the whole glass to be paved with the battery pieces or the insulation reflective film for directional light guide to be attached to the periphery of the battery pieces, and sunlight is fully utilized. The assembly is high in power generation efficiency, simple in structure, attractive and wide in application prospect.

Description

Technical Field

[0001] The utility model relates to a new energy component structure, in particular to a photovoltaic component structure. Background Art

[0002] With its continued development in recent years, the photovoltaic industry has become one of my country's fastest-growing new energy industries. During this development, photovoltaic professionals are constantly striving to improve the light utilization efficiency of photovoltaic modules and reduce the cost of photovoltaic power generation. This process of cost reduction and efficiency improvement inevitably leads to product upgrades and iterations, as well as advancements in photovoltaic materials and module structures. Existing modules require a certain amount of clearance between the cell and the surrounding metal frame to ensure safety. Therefore, light from this clearance is not utilized by the cell.

[0003] Existing technologies primarily use glazed grid glass or white reflective film applied around the edges to increase light reflection between the cells and the frame, thereby improving module light utilization. However, while glazed grid glass can improve light reflection around the cells and the frame, it also poses a significant risk due to the increased risk of cracking after the white glaze is applied. Furthermore, the reflectivity of glazed grid glass is relatively low, limiting its impact on module efficiency. White reflective film applied around the edges also reduces light utilization due to its lack of directional reflection. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a photovoltaic module structure that can increase the creepage distance, improve the power generation efficiency and reliability of the module.

[0005] Technical solution: The photovoltaic module structure described in the present invention includes a multi-layer structure arranged along its thickness direction and a frame surrounding the outer periphery of the multi-layer structure; the multi-layer structure includes a light-transmitting element, a front packaging layer, a plurality of solar cells spaced apart from each other, a rear packaging layer and a protective element arranged in sequence, and the periphery of the multi-layer structure is provided with an edge-sealing insulating strip for increasing the creepage distance between the multi-layer structure and the frame; the edge-sealing insulating strip covers from the top of the light-transmitting element to the bottom of the protective element along the thickness direction of the multi-layer structure.

[0006] Furthermore, the edge sealing insulating strip extends from the outer side of the edge light-transmitting element to its upper surface and covers 5-8 mm; the insulating strip extends from the outer side of the edge protection element to its lower surface and covers 5-8 mm.

[0007] Furthermore, the insulating water-blocking tape has a thickness of 300-350 μm, RTI: 90-120° C., and CTI: 600-700 V.

[0008] Furthermore, the photovoltaic module is a double-glass module, and the light-transmitting element and the protective element are both made of glass; a reflective film is provided between the rear encapsulation layer and the protective element, and the reflective film is 2-3 mm away from the edge of the protective element.

[0009] Furthermore, the edge of the solar cell close to the frame may extend to the edge of the protection element.

[0010] Furthermore, silicone is injected between the frame and the edge-sealing insulating strip to bond the frame and the edge-sealing insulating strip and to block water.

[0011] Furthermore, the edge-sealing insulating rubber strip is an edge-sealing insulating water-blocking rubber strip.

[0012] Furthermore, the edge-sealing insulating and water-blocking rubber strip comprises a base material layer and a waterproof insulating rubber layer disposed on the base material layer; or the edge-sealing insulating and water-blocking rubber strip comprises a base material layer, with a waterproof insulating rubber layer and a water-blocking aluminum foil layer disposed on the upper and lower surfaces of the base material layer, respectively. The waterproof insulating rubber layer serves as both a bonding and water-blocking function; the water-blocking aluminum foil layer disposed on the other side of the base material layer further enhances the water-blocking effect.

[0013] Furthermore, a release film for protecting the waterproof insulating adhesive layer is provided on the upper surface of the waterproof insulating adhesive layer.

[0014] Furthermore, the substrate layer is at least one of polyolefin films, PET, PBT and polyurethane films.

[0015] Furthermore, the waterproof insulating adhesive layer is at least one of acrylic adhesive, acrylic acid, polyurethane, butyl rubber, styrene-butadiene rubber and polyisobutyl rubber.

[0016] Furthermore, the thickness of the water-blocking aluminum foil layer is 6um-14um.

[0017] Beneficial effects: Compared with the prior art, the present invention has achieved the following significant effects: (1) The photovoltaic module of the present invention is a special full-screen photovoltaic module with no frame on the front of the module. Sealing insulation strips are attached around the module to increase the creepage distance of the module. The increase in creepage distance can make the cells cover the entire glass or attach directional light-guiding insulating reflective film around the cells to make full use of sunlight. The module has high power generation efficiency, simple structure, beautiful appearance and broad application prospects. (2) The use of sealing insulation water-blocking strips around the edges increases the creepage distance, so that the area where the cells are laid on the glass is larger, and the photovoltaic module has higher power generation efficiency; (3) The use of sealing insulation water-blocking strips around the photovoltaic module increases the creepage distance and increases the application space of the metal light-guiding film. The use of the light-guiding film increases the power generation efficiency and reliability of the module; (4) A layer of sealing insulation water-blocking strips is attached to the edges of the photovoltaic module, which increases the waterproof ability of the photovoltaic module and the ability of the module to resist external impact and damage, and can reduce the problem of debris generated during the production, transportation and installation of the module. (5) The photovoltaic module of the present invention has a simple structure and can use the existing film-sticking equipment in the current double-glass module production. No additional equipment investment is required. It matches the production process of existing photovoltaic modules and can be laminated and formed with the photovoltaic modules in one step, with high production efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of the photovoltaic module structure and frame structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the longitudinal section structure of the edge position of the photovoltaic module of the present invention. DETAILED DESCRIPTION

[0020] The utility model is described in further detail below.

[0021] like Figure 1 、 2As shown, the present invention provides a photovoltaic module structure, including a multi-layer structure arranged along its thickness direction, and a frame 1 surrounding the periphery of the multi-layer structure; the multi-layer structure includes a light-transmitting element 4, a front encapsulation layer (not shown in the figure), a plurality of solar cells 6 spaced apart from each other, a rear encapsulation layer (not shown in the figure), and a protective element 5 arranged in sequence; the periphery of the multi-layer structure is provided with an edge-sealing insulating adhesive strip 2 for increasing the creepage distance between the multi-layer structure and the frame 1; the edge-sealing insulating adhesive strip 2 covers from the top of the light-transmitting element 4 to the bottom of the protective element 5 along the thickness direction of the multi-layer structure. The photovoltaic module of this embodiment is a double-glass module, the light-transmitting element 4 is the upper protective glass, and the protective element 5 is the lower protective glass. The front encapsulation layer and the rear encapsulation layer are both adhesive films commonly used in the prior art. The front encapsulation layer of this embodiment is an upper transparent adhesive film, and the rear encapsulation layer is a lower transparent adhesive film. In this embodiment, a reflective film 3 is provided between the rear encapsulation layer and the protective element 5; the reflective film 3 of the present invention can be an insulating light-guiding film. The edge of the photovoltaic module includes, from the outside to the inside, a frame 1, an edge-sealing insulating strip 2, and silicone is injected between the frame 1 and the edge-sealing insulating strip 2 to bond the frame 1 and the edge-sealing insulating strip 2 and block water; the edge of the photovoltaic module includes, from top to bottom, the upper part of the edge-sealing insulating strip 2, the upper protective glass, the upper transparent film, the battery cell group, the lower transparent film, the reflective film 3, the lower protective glass, the lower part of the insulating water-blocking strip and the lower part of the frame 1.

[0022] The edge-sealing insulating tape 2 of this embodiment has a thickness of 300-350 μm, an RTI of 90-120° C., and a CTI of 600-700 V.

[0023] The insulating water-blocking strip of the present embodiment is wrapped around the edge of the photovoltaic module, and is in close contact with the surface of the upper protective glass and the surface of the lower protective glass, and extends 5-8 mm from the outside to the inside of the glass respectively, that is, the edge-sealing insulating strip 2 of the present embodiment extends from the outer side of the edge light-transmitting element 4 to its upper surface to cover 5-8 mm; the insulating strip extends from the outer side of the edge protection element 5 to its lower surface to cover 5-8 mm.

[0024] The reflective film 3 is 2-3mm away from the edge of the protective element 5. The reflective film 3 is attached to the lower protective glass between the 6 cells and the edge of the glass, 2-3mm away from the edge; or the 6 cells cover the entire lower glass, 2-3mm away from the edge of the glass.

[0025] The edge of the solar cell 6 close to the frame 1 may extend to the edge of the protection element 5 .

[0026] The edge-sealing insulating adhesive strip 2 of this embodiment is a water-blocking insulating adhesive strip. This embodiment comprises a substrate layer, a waterproof insulating adhesive layer disposed on the upper surface of the substrate layer, and a release film disposed on the upper surface of the waterproof insulating adhesive layer to protect the waterproof insulating adhesive layer. A water-blocking aluminum foil layer may also be disposed on the lower surface of the substrate layer. The substrate layer of the present invention may be at least one of a polyolefin film, PET, PBT, and a polyurethane film. The water-blocking insulating adhesive layer may be at least one of acrylic adhesive, acrylic acid, polyurethane, butyl rubber, styrene-butadiene rubber, and polyisobutyl rubber. The thickness of the water-blocking aluminum foil layer is 6 μm to 14 μm.

Claims

1. A photovoltaic module structure, comprising a multilayer structure arranged along its thickness direction, and a frame (1) surrounding the periphery of the multilayer structure; the multilayer structure comprises a light-transmitting element (4), a front encapsulation layer, a plurality of solar cells (6) spaced apart from each other, a rear encapsulation layer, and a protective element (5) arranged in sequence, characterized in that: The periphery of the multi-layer structure is provided with an edge-sealing insulating rubber strip (2) for increasing the creepage distance between the multi-layer structure and the frame (1); the edge-sealing insulating rubber strip (2) covers from the top of the light-transmitting element (4) to the bottom of the protective element (5) along the thickness direction of the multi-layer structure.

2. The photovoltaic module structure according to claim 1, characterized in that: The edge sealing insulating rubber strip (2) extends from the outer side of the edge light-transmitting element (4) to the upper surface thereof, covering 5-8 mm; the insulating rubber strip (2) extends from the outer side of the edge protection element (5) to the lower surface thereof, covering 5-8 mm.

3. The photovoltaic module structure according to claim 1, characterized in that: The thickness of the edge-sealing insulating rubber strip (2) is 300-350 μm.

4. The photovoltaic module structure according to claim 1, characterized in that: The photovoltaic module is a double-glass module, and the light-transmitting element (4) and the protective element (5) are both made of glass; a reflective film (3) is provided between the rear encapsulation layer and the protective element, and the reflective film (3) is 2-3 mm away from the edge of the protective element (5).

5. The photovoltaic module structure according to claim 1, characterized in that: The edge of the solar cell (6) close to the frame (1) can extend to the edge of the protection element (5).

6. The photovoltaic module structure according to claim 1, characterized in that: Silicone for bonding the frame (1) and the edge-sealing insulating rubber strip (2) and blocking water is injected between the frame (1) and the edge-sealing insulating rubber strip (2).

7. The photovoltaic module structure according to claim 1, characterized in that: The edge-sealing insulating rubber strip (2) is an edge-sealing insulating water-blocking rubber strip.

8. The photovoltaic module structure according to claim 7, characterized in that: The edge-sealing insulating water-blocking rubber strip includes a base material layer and a waterproof insulating rubber layer provided on the base material layer; or the edge-sealing insulating water-blocking rubber strip includes a base material layer, and the upper and lower surfaces of the base material layer are respectively provided with a waterproof insulating rubber layer and a water-blocking aluminum foil layer.

9. The photovoltaic module structure according to claim 8, characterized in that: The thickness of the water-blocking aluminum foil layer is 6um-14um.

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