High-efficiency curved-surface photovoltaic module

Abstract

The utility model belongs to the technical field of photovoltaic modules, and particularly relates to a high-efficiency curved-surface photovoltaic module, which comprises a curved-surface front plate, a front adhesive film, a power generation unit layer, a rear adhesive film and a curved-surface back plate, the power generation unit layer comprises a plurality of battery strings, and the battery strings are arranged in the direction perpendicular to the curved surface; and each battery string is connected with an optimization chip. The curved surface front plate is made of high-light-transmittance curved surface glass. The high-efficiency curved-surface photovoltaic module has the advantages that the manufacturing process is simple, the influence of current mismatch and shielding can be reduced, and the generating capacity can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic components, and in particular relates to a high-efficiency curved photovoltaic component. Background Art

[0002] Solar energy is a renewable, clean energy source that is not restricted by geographic location. With the recent development of photovoltaic technology, the cost of photovoltaic power generation has rapidly declined, leading to its widespread adoption. The integration of photovoltaics into buildings has also become a growing area of ​​photovoltaic application. Building-integrated photovoltaics (BIPV) integrates photovoltaic products into buildings, making photovoltaic power generation devices integral components and replacing some building materials. With the continued development of BIPV, the demand for curved photovoltaic modules is also increasing.

[0003] Because the surface of curved photovoltaic modules is curved, the light intensity received by cells at different positions under light is different, which leads to current mismatch; and due to the influence of the angle of incident light, the peak area will block the cells in the trough area during certain time periods, resulting in a hot spot effect, which seriously affects the normal operation of the battery and the overall performance of the system.

[0004] In order to solve the current mismatch and shading problems of the existing curved photovoltaic module cells, the utility model provides a high-efficiency curved photovoltaic module with a simple manufacturing process, which can reduce the current mismatch and shading effects and increase the power generation. Utility Model Content

[0005] The purpose of this utility model is to provide a high-efficiency curved photovoltaic module to solve the technical problem of hot spot effect, which seriously affects the normal operation of the battery and the overall performance of the system. The manufacturing process is simple and the purpose of reducing current mismatch and shading effects and increasing power generation can be achieved.

[0006] In order to solve the above technical problems, the present invention provides a high-efficiency curved photovoltaic module, comprising:

[0007] Curved front panel, front film, power generation unit layer, rear film and curved back panel;

[0008] The power generation unit layer includes a plurality of battery strings, and the battery strings are arranged in a direction perpendicular to the curved surface;

[0009] Each of the battery strings is connected to an optimization chip.

[0010] Furthermore, the curved front panel is high-transmittance curved glass.

[0011] Furthermore, the battery string is made of crystalline silicon or amorphous silicon, and the size of the battery string is less than half of the chord length.

[0012] Furthermore, the curved front panel and the curved back panel are wavy, and the curved front panel and the curved back panel are provided with trough areas and crest areas, and the trough areas and the crest areas form a complete curved surface.

[0013] Furthermore, the optimization chips are connected in series or in parallel.

[0014] Furthermore, the front adhesive film and the back adhesive film are made of one of EVA, POE or PVB.

[0015] Furthermore, the curved back panel is made of one of a back panel and glass.

[0016] The beneficial effects of the utility model are:

[0017] 1. By connecting an optimization chip to each battery string, when the optimization chip is connected in series, if the current of each battery string is different due to the curved position or obstruction, the optimization chip can play the role of reducing voltage and increasing current, so that the current of the series circuit will not be affected by the low-current battery string. The current of different battery strings is always consistent, reducing current mismatch loss and increasing the power generation of the component.

[0018] 2. By connecting an optimization chip to each battery string, when the optimization chips are connected in parallel, if the voltage of each battery string is different due to shading, the optimization chip can play the role of boosting voltage and reducing current, so that the voltage of the parallel circuit will not be affected by the low-voltage battery string. The voltage of different battery strings always remains consistent, reducing voltage mismatch loss and increasing the power generation of the component.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural schematic diagram of a high-efficiency curved photovoltaic module of the present utility model;

[0022] Figure 2 This is a schematic diagram of the parallel structure of optimized chips of a high-efficiency curved photovoltaic module of the utility model;

[0023] Figure 3This is a schematic diagram of the structure of the series connection of the optimization chips of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the trough area and the peak area of ​​the utility model.

[0025] In the picture:

[0026] 1. Curved front panel; 11. Trough area; 12. Peak area;

[0027] 2. Front film;

[0028] 3. Power generation unit layer; 31. Battery string; 32. Optimized chip;

[0029] 4. Back film;

[0030] 5. Curved back panel. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] Example:

[0033] like Figures 1 to 4 As shown, a high-efficiency curved photovoltaic module comprises, in sequence, the following fully laminated components: a curved front panel 1, a front adhesive film 2, a power generation unit layer 3, a back adhesive film 4, and a curved back panel 5. The curved front panel 1 is formed of high-transmittance curved glass. Cell strings 31 are made of either crystalline silicon or amorphous silicon, and are smaller than half the chord length. The curved front panel 1 and the curved back panel 5 are wavy in shape, with troughs 11 and crests 12 forming a complete curved surface. The front adhesive film 2 and the back adhesive film 4 are made of EVA, POE, or PVB. The curved back panel 5 is made of either a back panel or glass. The power generation unit layer 3 includes several cell strings 31, arranged perpendicular to the curved surface. Each cell string 31 is connected to an optimized chip 32.

[0034] The optimization chips 32 are connected in series or in parallel.

[0035] In this embodiment, the optimization chip 32 has functions such as step-up and step-down, MPPT tracking, shutdown and monitoring.

[0036] In the comparative example, the battery strings 31 in the power generation unit layer 3 are arranged in a direction parallel to the curved surface to form an assembly 1 .

[0037] In the embodiment, the battery strings 31 in the power generation unit layer 3 are arranged in a direction perpendicular to the curved surface to form an assembly 2 .

[0038] Two types of modules were installed outdoors to compare their power generation. The experimental setup involved connecting the two types of modules to a micro-inverter and an electric meter of the same model, facing south at a 23° tilt angle. A micro-grid-connected system was constructed, and the power generation was recorded with an electric meter for comparison. The experimental comparison results are as follows:

[0039]

[0040] In the table: Power generation per kilowatt per day = power generation / installed capacity / number of days. This data is an important indicator for evaluating the power generation efficiency of components.

[0041] As shown in the table above, Module 2 achieves a power generation gain of approximately 6.6% compared to Module 1, demonstrating that a high-efficiency curved photovoltaic module can improve module power generation. High-efficiency curved photovoltaic modules are arranged perpendicular to the curvature. Cells located at the same curvature position are connected in series to form a cell string 31, reducing current mismatch caused by varying curvature positions. Each cell string 31 is connected to an optimization chip 32. When currents vary between cell strings 31 due to curvature or shading, the optimization chip 32 acts to reduce voltage and increase current. This ensures that the current in the series circuit is not affected by the low-current cell string 31, ensuring that the currents in different cell strings 31 remain consistent. This reduces current mismatch losses and increases the module's power generation.

[0042] To summarize: by connecting an optimization chip 32 to each battery string 31, when the optimization chip 32 is connected in series, when the current of each battery string 31 is different due to the curved position or shielding, the optimization chip 32 can play the role of reducing voltage and increasing current, so that the current of the series circuit will not be affected by the low-current battery string 31, and the current of different battery strings 31 will always remain consistent, reducing current mismatch loss and increasing the power generation of the component. By connecting an optimization chip 32 to each battery string 31, when the optimization chip 32 is connected in parallel, when the voltage of each battery string 31 is different due to shielding, the optimization chip 32 can play the role of increasing voltage and reducing current, so that the voltage of the parallel circuit will not be affected by the low-voltage battery string 31, and the voltage of different battery strings 31 will always remain consistent, reducing voltage mismatch loss and increasing the power generation of the component.

[0043] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0044] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-efficiency curved photovoltaic module, characterized in that: Including full fit in sequence: A curved front plate (1), a front adhesive film (2), a power generation unit layer (3), a rear adhesive film (4) and a curved back plate (5); The power generation unit layer (3) includes a plurality of battery strings (31), and the battery strings (31) are arranged in a direction perpendicular to the curved surface; Each of the battery strings (31) is connected to an optimization chip (32).

2. A high-efficiency curved photovoltaic module according to claim 1, characterized in that: The curved front panel (1) is high-transmittance curved glass.

3. A high-efficiency curved photovoltaic module according to claim 2, characterized in that: The battery string (31) is made of crystalline silicon or amorphous silicon, and the size of the battery string is less than half the length of the chord.

4. A high-efficiency curved photovoltaic module according to claim 3, characterized in that: The curved front panel (1) and the curved back panel (5) are wavy in shape, and the curved front panel (1) and the curved back panel (5) are provided with a trough area (11) and a crest area (12), and the trough area (11) and the crest area (12) form a complete curved surface.

5. The high-efficiency curved photovoltaic module according to claim 4, characterized in that: The optimization chips (32) are connected in series or in parallel.

6. A high-efficiency curved photovoltaic module according to claim 5, characterized in that: The front adhesive film (2) and the back adhesive film (4) are made of one of EVA, POE or PVB.

7. The high-efficiency curved photovoltaic module according to claim 6, characterized in that: The curved back panel (5) is made of one of a back panel and glass.

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