CN217239483U - Bus bar for photovoltaic module and photovoltaic module - Google Patents

Abstract

The utility model provides a busbar and a photovoltaic module for photovoltaic module, this busbar for photovoltaic module includes: a substrate having first and second opposing surfaces, the second surface having a plurality of raised structures; the connecting layer is positioned on the first surface; the light reflecting coating is positioned on the raised structure and can reflect light rays in a specific wavelength range; and the black coating is positioned on the light reflecting coating and can transmit the light rays in the specific wavelength range. The utility model discloses a bus bar for photovoltaic module is through setting up reflection of light coating on the bus bar to and set up black coating on reflection of light coating, when satisfying black pleasing to the eye, improved photovoltaic module's output.

Description

Bus bars and PV modules for PV modules

technical field

The utility model mainly relates to the field of photovoltaics, in particular to a bus bar for photovoltaic assemblies and a photovoltaic assembly.

Background technique

Existing photovoltaic modules mainly use photovoltaic interconnection bars and bus bars coated with tin-lead alloys for electrical connection. Use to improve the output power of photovoltaic modules. With the application of distributed photovoltaics and the development of high-end products, high-end black aesthetic photovoltaic modules suitable for roof scenes of buildings are more and more recognized and accepted by customers, but the existing aesthetic components mainly use black isolation films or black busses The strips are encapsulated and electrically connected, and there are disadvantages such as low utilization of sunlight and large output power loss of photovoltaic modules.

Therefore, how to improve the utilization rate of sunlight by photovoltaic modules and ensure the aesthetics of photovoltaic modules is an urgent problem to be solved.

Utility model content

The technical problem to be solved by the present invention is to provide a bus bar for photovoltaic components, which can improve the output power of photovoltaic components while satisfying the black appearance.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is a bus bar for photovoltaic modules, comprising: a base body, which has a first surface and a second surface opposite to each other, and the second surface has a plurality of protruding structures a connecting layer on the first surface; a reflective coating on the raised structure, the reflective coating being able to reflect light in a specific wavelength range; and a black coating on the reflective coating, the The black coating can transmit light in the specific wavelength range.

In an embodiment of the present invention, the base body further has opposite first side surfaces and second side surfaces, and the connection layer is also located on the first side surfaces, the second side surfaces, and the second surface, wherein The reflective coating is formed on the surface of the tie layer on the first side, the second side and the second surface.

In an embodiment of the present invention, the thickness of the connection layer located on the first surface is greater than the thickness of the connection layer located on the first side surface, the second side surface and the second surface.

In an embodiment of the present invention, the base further has opposite first and second side surfaces, and the reflective coating is in contact with the protruding structure, the first side surface and the second side surface.

In an embodiment of the present invention, the shape of the cross section of the protruding structures is a triangle, and the protruding structures form an included angle of a predetermined angle.

In an embodiment of the present invention, the connection layer includes a solder layer and/or a conductive adhesive layer.

In an embodiment of the present invention, the thickness of the reflective coating is 1-50 μm.

In an embodiment of the present invention, the thickness of the black coating is 1-50 μm.

In an embodiment of the present invention, the material of the black coating is iron tetroxide, manganese oxide, carbon black or black organic resin.

In order to solve the above technical problems, the present invention also proposes a photovoltaic assembly, comprising: at least two solar cell strings, and the aforementioned bus bars for photovoltaic assemblies, wherein the solar cell strings are connected in parallel by the bus bars.

The bus bar for photovoltaic modules of the utility model has a black appearance and improves the output power of the photovoltaic module by arranging a reflective coating on the bus bar and a black coating on the reflective coating.

Description of drawings

In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and easy to understand, the specific embodiments of the present utility model are described in detail below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic cross-sectional view of a bus bar for a photovoltaic module according to an embodiment of the present invention;

2 is a schematic cross-sectional view of a bus bar for a photovoltaic module according to another embodiment of the present invention.

drawing number

110 Matrix

111 First surface

112 Second surface

113 Raised structure

114 First side

115 Second side

116 The included angle of the preset angle

120 connection layers

130 Reflective coating

140 black coating

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, so the present invention is not limited by the specific embodiments disclosed below. limit.

As shown in this application and in the claims, unless the context clearly dictates otherwise, the words "a", "an", "an" and/or "the" are not intended to be specific in the singular and may include the plural. Generally speaking, the terms "comprising" and "comprising" only imply that the clearly identified steps and elements are included, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

In addition, although the terms used in this application are selected from well-known and common terms, some terms mentioned in the specification of this application may be chosen by the applicant at his or her judgment, and the detailed meanings of which are set forth herein. described in the relevant section of the description. Furthermore, it is required that the application be understood not only by the actual terms used, but also by the meaning implied by each term.

FIG. 1 is a schematic cross-sectional view of a bus bar for a photovoltaic module in an embodiment of the present invention. Referring to FIG. 1 , in this embodiment, the bus bar 100 includes a base body having a first surface 111 and a second surface 112 110. The second surface 112 has a plurality of side-by-side protruding structures 113, and these protruding structures 113 can make the second surface 112 have a larger area for reflecting sunlight, thereby improving the utilization rate of sunlight. It should be noted that although in the embodiment of FIG. 1 , the cross-section of the protruding structures 113 is triangular and the number is 5, but in other embodiments of the present invention, the cross-section of the protruding structures may also be Semicircle, rectangle and polygon, and the number of raised structures is not limited to 5, for example, it can be 3, 8 or any other number.

A reflective coating 130 is formed on the protruding structure 113, so that the light irradiated on the reflective coating on the protruding structure 113 can be reflected to the battery sheet at a certain angle, when the cross-sectional shape of the protruding structure 113 is implemented as a triangle, it is similar. An included angle 116 of a predetermined angle is formed between the adjacent inclined surfaces of the adjacent protruding structures 113 . In order to make the most reflected light rays, the shortest reflection distance and the smallest loss during the reflection process, in the embodiment of the present application, the range of the preset angle can be set between 90° and 150°, and the specific preset angle size can be determined according to the actual situation. The application is adjusted and is not limited to the above-mentioned angles.

The bus bar 100 in the embodiment of FIG. 1 further includes a connection layer 120 located on the first surface 111 , and the material of the connection layer 120 includes a solder layer and/or conductive glue. When the material of the connection layer is a solder layer and a conductive glue, it can be specifically implemented that a part of the connection layer 120 on the first surface 111 is a conductive glue, and the remaining part of the connection layer 120 is a solder layer. In this embodiment, the connection layer 120 may be used to connect the bus bar 100 to a photovoltaic cell panel (not shown).

As shown in FIG. 1 , the bus bar 100 further includes a reflective coating 130 on the surface of the protruding structure 113 , and a black coating 140 on the surface of the reflective coating 130 . The reflective coating 130 can reflect light in a specific wavelength range, and the black coating 140 can transmit light in the specific wavelength range. In some embodiments of the present invention, the specific wavelengths are 300-400 nm and 780-1200 nm. In some other embodiments of the present invention, the thickness of the reflective coating 130 is 1-50 μm, and the thickness of the black coating 140 is 1-50 μm.

In order to further illustrate the relationship between the specific wavelength range that the reflective coating can reflect and the specific wavelength range that the black coating can transmit in the present invention, a specific example is given here: if the wavelength range of light that the reflective coating can reflect is 800-900nm, the wavelength range of the light that the black coating can transmit is 800-1000nm, then the reflective coating can reflect light in the wavelength range of 800-900nm, while the black coating 140 can transmit light in the wavelength range of 800-900nm . Here, 800-900 nm is the intersection of the wavelength range of light that the reflective coating can reflect and the wavelength range of light that the black coating can transmit. It can be understood that the above examples are not intended to limit a specific specific wavelength range. Therefore, in the embodiment of the present invention, the aforementioned intersection is selected as the reflective coating and the black coating in the desired specific wavelength range.

The reflective coating 130 on the protruding structure 113 can reflect sunlight in a specific wavelength range to be reused, thereby increasing the output power of the photovoltaic module. The material of the black coating 140 on the reflective coating 130 is iron tetroxide, manganese oxide, carbon black or black organic resin, which on the one hand allows sunlight in a specific wavelength range to pass through, and on the other hand, is used for the reflection of the reflective coating 130. Coloring is performed to make the bus bar 100 appear black, so that the bus bar can improve the utilization rate of sunlight while satisfying the black appearance.

Referring to FIG. 1 , in some embodiments of the present invention, the base body 110 further has opposite first side surfaces 114 and second side surfaces 115 . The reflective coating 130 is formed on the surface of the protruding structure 113 and on the two sides in contact with the first side 114 and the second side 115 , and a black coating 140 is also formed on the reflective layer 130 . By arranging a reflective layer on the side surface of the base body, the area of the reflective surface can be increased, thereby improving the utilization rate of light.

FIG. 2 is an exemplary cross-sectional view of a bus bar 200 for a photovoltaic module according to another embodiment of the present invention. Referring to FIG. 2 , the difference from FIG. 1 is that in this embodiment, the connection layer 120 is also located on the first One side 114, the second side 115 and the second surface 112, wherein the thickness of the connection layer 120 located on the first surface 111 is greater than the thickness of the connection layer 120 located on the first side 114, the second side 115 and the second surface 112, By arranging a thinner connection layer on the surface that is not used for subsequent fixing of the base body, material can be saved and production costs can be reduced. The reflective coating 130 is formed on the surface of the connection layer 130 . Compared with selectively forming the connection layer 120 on the first surface 111 of the base body 110 in the embodiment in FIG. 1 , the manufacturing process can be simplified by forming the connection layer on the entire surface of the base body 110 .

The bus bar for photovoltaic modules of the utility model is provided with a reflective coating on the bus bar, and a black black coating is arranged on the reflective coating, which not only satisfies the black appearance, but also improves the output power of the photovoltaic module.

Another aspect of the present invention provides a photovoltaic module, the photovoltaic module includes at least two solar cell strings, and the above-mentioned bus bar for the photovoltaic module, the solar cell strings can be connected in series or in parallel through the above bus bars, Or part of the solar cell strings are connected in series through the bus bars, and the remaining part of the solar cell strings are connected in parallel through the bus bars. The photovoltaic module has the advantages of high output power and beautiful appearance.

The basic concept has been described above. Obviously, for those skilled in the art, the above disclosure of the utility model is only an example, and does not constitute a limitation to the present application. Although not explicitly described herein, various modifications, improvements, and corrections to this application may occur to those skilled in the art. Such modifications, improvements, and corrections are suggested in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe the embodiments of the present application. Such as "one embodiment," "an embodiment," and/or "some embodiments" means a certain feature, structure, or characteristic associated with at least one embodiment of the present application. Therefore, it should be emphasized and noted that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in different places in this specification are not necessarily referring to the same embodiment . Furthermore, certain features, structures or characteristics of the one or more embodiments of the present application may be combined as appropriate.

Some examples use numbers to describe quantities of ingredients and attributes, it should be understood that such numbers used to describe the examples, in some examples, use the modifiers "about", "approximately" or "substantially" to retouch. Unless stated otherwise, "about", "approximately" or "substantially" means that a variation of ±20% is allowed for the stated number. Accordingly, in some embodiments, the numerical parameters set forth in the specification and claims are approximations that can vary depending upon the desired characteristics of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and use a general digit reservation method. Notwithstanding that the numerical fields and parameters used in some embodiments of the present application to confirm the breadth of their ranges are approximations, in particular embodiments such numerical values are set as precisely as practicable.

Claims (10)

1. A bus bar for a photovoltaic module, comprising:

a substrate having first and second opposing surfaces, the second surface having a plurality of raised structures;

a connecting layer on the first surface;

the light reflecting coating is positioned on the raised structure and can reflect light rays in a specific wavelength range; and

and the black coating is positioned on the light reflecting coating and can transmit the light rays in the specific wavelength range.

2. A busbar for a photovoltaic module according to claim 1, wherein said substrate further has opposite first and second sides, said tie layer further being located on said first side, said second side and said second surface, wherein said light reflecting coating is formed on the surface of the tie layer located on said first side, said second side and said second surface.

3. A bus bar for a photovoltaic module according to claim 2, wherein the thickness of the connection layer at the first surface is greater than the thickness of the connection layer at the first side surface, the second side surface, and the second surface.

4. A busbar for a photovoltaic module according to claim 1, wherein said substrate further has opposite first and second sides, said light reflecting coating contacting said raised structures, said first side and said second side.

5. The busbar for photovoltaic modules according to claim 1, wherein said raised structures have a triangular cross-sectional shape with a predetermined angular separation between said raised structures.

6. A busbar for a photovoltaic module according to claim 1, wherein said connecting layer comprises a solder layer and/or a conductive glue layer.

7. A bus bar for photovoltaic modules according to claim 1, wherein the thickness of the light reflecting coating is 1 to 50 μm.

8. A bus bar for photovoltaic modules according to claim 1, wherein the black coating has a thickness of 1 to 50 μm.

9. The bus bar for a photovoltaic module according to claim 1, wherein a material of the black coating layer is ferroferric oxide, manganese oxide, carbon black, or a black organic resin.

10. A photovoltaic module, comprising:

a plurality of solar cell strings;

the bus bar for a photovoltaic module according to any one of claims 1 to 9, wherein the solar cell strings are connected in series or in parallel by the bus bar, or a part of the solar cell strings are connected in series by the bus bar and the remaining part of the solar cell strings are connected in parallel by the bus bar.

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