A photovoltaic hollow module

Abstract

This utility model discloses a photovoltaic hollow module, including a front panel, solar cells, an intermediate glass layer, and a back panel arranged sideways along the light-receiving surface. The front side of the solar cells is assembled to the front panel via a first adhesive film, and the rear side is assembled to the intermediate glass layer via a second and a third adhesive film. The intermediate glass layer is assembled to the back panel via spacers and sealant on both sides. The key feature is that a hollow layer is formed between the intermediate glass layer and the back panel, and a second junction box is fixedly installed within the hollow layer. Coaxial holes are respectively formed on the second and third adhesive films and the intermediate layer. This utility model separates the bypass diode and the terminal block in the junction box, creating two junction boxes. One junction box only functions as a bypass diode, while the other only transmits current. This allows for a reduction in the thickness and width of the junction boxes while still enabling current transmission of rated currents above 15A.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic equipment technology, specifically a photovoltaic hollow module. Background Technology

[0002] Building-integrated photovoltaics (BIPV) has become an indispensable part of building energy conservation and carbon reduction, and hollow photovoltaic modules, as a typical representative of photovoltaic components, are increasingly widely used in buildings. Currently, the junction box installation location for hollow photovoltaic modules, as a component of photovoltaic buildings, generally falls into two categories: one is installed on the side of the module, and the other is installed on the back. Junction boxes installed on the side of the module are generally used for hollow modules of thin-film solar cells or for all the cells of crystalline silicon solar cells connected in series; junction boxes installed on the back of the module are generally used for crystalline silicon solar modules with the cells connected in parallel.

[0003] Since a junction box mainly consists of two parts—a bypass diode and terminals—the two parts are generally integrated into a single junction box, meeting relevant standards. If a side-mounted junction box with a rated current exceeding 15A is to be made, its thickness and width would be too large, failing to meet installation requirements for solar hollow modules and curtain walls. If a high-current junction box exceeding 15A is installed on the back of the solar hollow module, the terminals must penetrate the hollow layer to reach the back of the module, potentially damaging the integrity of the hollow layer or increasing the difficulty of its production. For photovoltaic hollow modules, side-mounted junction boxes are generally preferred. These boxes, installed on the module, can be concealed within the curtain wall mounting frame, offering convenience and aesthetics. However, in grid-connected modules, the high current and low voltage of the photovoltaic modules increase the overall cost of the photovoltaic system.

[0004] This case arose in order to resolve the aforementioned issues. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a photovoltaic hollow module that solves the problems mentioned in the background section.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: A photovoltaic hollow module includes a front panel, solar cells, an intermediate glass layer, and a back panel arranged along the side of the light-receiving surface. The front side of the solar cells is assembled with the front panel via a first adhesive film, and the rear side is assembled with the intermediate glass layer via a second and a third adhesive film. The intermediate glass layer is assembled with the back panel via spacers and sealant on both sides, forming a hollow layer between the intermediate layer and the back panel. A second junction box is fixedly installed in the hollow layer. The second adhesive film, the third adhesive film, and the intermediate layer are each provided with coaxial holes. A first junction box is provided on the side of the photovoltaic hollow module, which is electrically connected to the solar cells via positive and negative cables and terminals. The second junction box contains a bypass diode, which is electrically connected to the first junction box via a busbar through a through hole.

[0009] Preferably, the rated current of the second junction box is preferably, but not limited to, greater than 15A; the rated current of the first junction box is preferably, but not limited to, greater than 15A.

[0010] Preferably, the first junction box is preferably, but not limited to, an integrated side junction box or a separate side junction box.

[0011] Preferably, the hollow layer includes a spacer strip, a first sealant, a second sealant, and an air-filled layer; the first junction box does not contain diodes, but only positive and negative cables and terminals.

[0012] The front panel is preferably, but not limited to, tempered glass or semi-tempered glass; the color is not limited to colorless, silver, or gray.

[0013] The first adhesive film is optimized, but not limited to, PVB adhesive film, SGP adhesive film, etc.; the second adhesive film is optimized, but not limited to, PVB adhesive film, SGP adhesive film, etc.; the third adhesive film is optimized, but not limited to, PVB adhesive film, SGP adhesive film, etc.; the color of the third adhesive film is optimized, but not limited to colorless or black.

[0014] The solar cells are optimized, but not limited to, crystalline silicon solar cells, thin-film solar cells, etc.

[0015] The intermediate layer is optimized, but not limited to, tempered glass, semi-tempered glass, etc.; the spacer is preferably, but not limited to, aluminum spacer with internal molecular sieve, warm edge strip, etc.; the first sealant is preferably, but not limited to, butyl rubber; the second sealant is preferably, but not limited to, silicone sealant, polyurethane sealant, polysulfide sealant, etc.; the gas-filled layer is preferably, but not limited to, air, nitrogen, argon, vacuum, etc.

[0016] The back panel is preferably, but not limited to, ultra-clear tempered glass, ultra-clear tempered LOW-E glass (single silver LOW-E glass, double silver LOW-E glass, triple silver LOW-E glass), etc. Beneficial effects

[0017] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0018] This utility model discloses a photovoltaic hollow module that separates the bypass diode and the terminal block in the junction box, making two junction boxes. One junction box only serves as the bypass diode, while the other junction box only serves as the current transmission box. This allows for a reduction in the thickness and width of the junction box while still enabling current transmission of rated currents of 15A or more.

[0019] This utility model discloses a photovoltaic hollow module. A junction box that acts as a bypass diode is installed in the hollow layer of the photovoltaic hollow module, and a junction box that transmits current is installed on the side of the photovoltaic hollow module. This achieves both low voltage and high current in the photovoltaic hollow module and meets the installation requirements of side-outlet wiring. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cross-section of the photovoltaic hollow module of this utility model;

[0021] Figure 2 This is a schematic diagram of the back view of the photovoltaic hollow module of this utility model.

[0022] In the diagram: 1. Front panel; 01. First adhesive film; 2. Battery cell; 02. Second adhesive film; 3. Third adhesive film; 4. Intermediate glass layer; 5. First junction box; 6. Hollow layer; 7. Second junction box; 8. Back panel; 9. Busbar; 11. Hole; 12. Spacer; 13. Sealant; 14. Positive cable; 15. Negative cable. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-2 As shown: A photovoltaic hollow module includes a front panel 1, solar cells 2, an intermediate glass layer 4, and a back panel 8 arranged along the side of the light-receiving surface. The front side of the solar cells 2 is fixedly assembled to the front panel 1 by a first adhesive film 01, and the rear side is fixedly assembled to the intermediate glass layer by a second adhesive film 02 and a third adhesive film 3. The intermediate glass layer is fixedly assembled to the back panel 8 by spacers 12 on both sides and sealant 13. A hollow layer 6 is formed between the intermediate layer and the back panel 8. A second junction box 7 is fixedly installed in the hollow layer 6. The second adhesive film 02, the third adhesive film 3, and the intermediate layer are respectively provided with coaxial holes 11.

[0025] A first junction box 5 is provided on the side of the photovoltaic hollow module, which is electrically connected to the solar cell 2 through positive and negative cables and terminals. A second junction box 7 contains a bypass diode, which is electrically connected to the first junction box 5 through the through hole 11 of the busbar 9. The first junction box 5 does not contain a diode, but only has a positive cable 14, a negative cable 15 and terminals.

[0026] The method of separating the bypass diode and terminal block in an integrated junction box into two junction boxes, wherein the first junction box 5 is installed in the hollow layer 6 and the second junction box 7 is installed on the side of the module, wherein the second junction box 7 only serves as a bypass and the first junction box 5 only serves as a current transmission method, and the two junction boxes cooperate to complete the function of the integrated photovoltaic junction box, and the rated current of the first junction box 5 and the second junction box 7 is not less than 15A.

[0027] The traditional integrated junction box is broken down into two junction boxes. The two junction boxes work together to achieve the functions of the integrated junction box while reducing the thickness and width of the junction box, thus meeting the installation requirements of photovoltaic hollow modules and photovoltaic curtain walls.

[0028] The first junction box 5 is installed on the side of the module to meet the requirements of high current and low voltage side junction box; the second junction box 7 is installed in the hollow layer 6 without affecting the integrity and functionality of the hollow layer 6; both the first junction box 5 and the second junction box 7 can achieve a rated current greater than 15A, which meets the requirements of photovoltaic hollow modules.

[0029] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. A photovoltaic hollow module, comprising a front panel, solar cells, an intermediate glass layer, and a back panel arranged sideways along the light-receiving surface, wherein the front side of the solar cells is assembled to the front panel via a first adhesive film, and the rear side is assembled to the intermediate glass layer via a second and a third adhesive film, and the intermediate glass layer is assembled to the back panel via spacers and sealant on both sides, characterized in that: A hollow layer is formed between the intermediate glass layer and the back sheet. A second junction box is fixedly installed in the hollow layer. Coaxial holes are respectively opened on the second film, the third film, and the intermediate layer. A first junction box is provided on the side of the photovoltaic hollow module, which is electrically connected to the solar cells through positive and negative cables and terminals. The second junction box contains a bypass diode, which is electrically connected to the first junction box through a busbar through hole.

2. A photovoltaic hollow assembly according to claim 1, characterized in that: The hollow layer includes an inflatable layer in the middle and a first sealant and a second sealant on both sides thereon. Spacer strips are installed on both sides of the inflatable layer, and the first and second sealants on both sides respectively wrap around the corresponding spacer strips.

3. A photovoltaic hollow assembly according to claim 1, wherein: The rated current of the second junction box is greater than 15A; the rated current of the first junction box is greater than 15A.

4. A photovoltaic hollow assembly according to claim 1, wherein: The first adhesive film is a PVB adhesive film or an SGP adhesive film; the second adhesive film is a PVB adhesive film or an SGP adhesive film; the third adhesive film is a PVB adhesive film or an SGP adhesive film; the color of the third adhesive film is colorless or black.

5. A photovoltaic hollow module according to claim 2, characterized in that: The intermediate layer is made of tempered glass or semi-tempered glass; the spacer is made of aluminum spacer or warm edge strip with internal molecular sieve; the first sealant is made of butyl rubber; the second sealant is made of any one of silicone sealant, polyurethane sealant, or polysulfide sealant; the gas filling layer is made of any one of air, nitrogen, argon, or vacuum.

6. A photovoltaic hollow assembly according to claim 1, wherein: The front panel is made of tempered glass or semi-tempered glass, and its color can be any one of colorless, silver, or gray.

7. A photovoltaic hollow assembly according to claim 1, wherein: The back panel is made of ultra-clear tempered glass or ultra-clear tempered LOW-E glass. The ultra-clear tempered LOW-E glass can be any one of single-silver LOW-E glass, double-silver LOW-E glass, or triple-silver LOW-E glass.

8. A photovoltaic hollow assembly according to claim 1, wherein: The battery cells are either crystalline silicon solar cells or thin-film solar cells.

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