CN209087866U - Photovoltaic modules - Google Patents

Abstract

The utility model provides a kind of photovoltaic module, including transparent cover plate, photovoltaic cell string and backboard, the photovoltaic cell string includes the transparent conductive film of several cell pieces and the concatenation cell piece, the cell piece is dereliction grid line cell piece, several thin gate line electrodes being parallel to each other are provided only on its light-receiving surface, the transparent conductive film is bonded on two neighboring cell piece.The utility model is covered on cell piece by using whole piece conductive film and is connected in series adjacent cell piece, the mode for replacing traditional welding to weld, matched is, cell piece uses the design of dereliction gate line electrode, welding, main grid line electrode are avoided in this way to the adverse effect of cell piece light-receiving area, are conducive to the electrical property for improving cell piece.

Description

Photovoltaic modules

technical field

The utility model relates to the field of photovoltaics, in particular to a photovoltaic assembly.

Background technique

With the development of the solar industry, the market has higher and higher requirements for the power generation efficiency of photovoltaic modules, and various new high-efficiency products have gradually emerged, such as shingled photovoltaic modules, bifacial power generation modules, etc. A conventional photovoltaic module includes a transparent cover plate, a back plate, an encapsulation film and a battery string encapsulated between the transparent cover plate and the back plate. The light enters the photovoltaic module from the transparent cover plate and irradiates the surface of the battery string to realize photoelectric conversion. , and the battery string is formed by connecting a large number of battery pieces in series, and the surface of the battery pieces is provided with grid electrodes for collecting current, and the adjacent battery pieces are connected in series by welding ribbons. As we all know, the electrical properties of photovoltaic cells are also directly related to the area of the light-receiving surface, and the grid line electrodes covered on the surface of the cells will sacrifice part of the light-receiving area, so that some areas of the cells are blocked by the grid line electrodes and cannot generate light. Therefore, the power generation efficiency of the cell cannot be maximized. Moreover, the use of welding ribbons to connect the cells has high requirements on the accuracy of the process and equipment, and the process technology is relatively complex.

Utility model content

In view of this, the present invention provides a photovoltaic assembly to improve the problems of insufficient light-receiving area and poor electrical performance in the prior art.

Specifically, the utility model is realized by the following technical solutions: a photovoltaic module, comprising a transparent cover plate, a photovoltaic cell string and a back plate, the photovoltaic cell string includes a plurality of battery slices and a transparent conductive layer connected in series with the battery slices A thin film, the battery sheet is a busbarless battery sheet, and only a number of mutually parallel thin gridline electrodes are arranged on the light-receiving surface, and the transparent conductive film is bonded to two adjacent battery sheets.

Further, the width of the transparent conductive film is equal to the width of the battery sheet.

Further, the transparent conductive film covers the entire light-receiving surface of the photovoltaic cell.

Further, in two adjacent cell sheets, one end of the transparent conductive film covers the light-receiving surface of one cell sheet, and the other end covers the backlight surface of the other cell sheet.

Further, the transparent conductive film is in the shape of a rectangular sheet.

Further, the transparent conductive film is in the shape of a strip.

Further, the length extending direction of the thin grid line electrode and the extending direction of the strip-shaped conductive film are perpendicular to each other, and one end of the strip-shaped conductive film is connected to one end of the thin grid line electrode.

The utility model uses a whole piece of conductive film to cover the battery slices to connect the adjacent battery slices in series, instead of the traditional welding method of the ribbon. In this way, the adverse effects of the ribbon and the busbar electrode on the light-receiving area of the cell are avoided, which is beneficial to improving the electrical performance of the cell.

Description of drawings

FIG. 1 is an internal schematic diagram of the photovoltaic assembly of the present invention.

FIG. 2 is a schematic diagram of the connection of two adjacent cells of the photovoltaic module of the present invention.

3 is a schematic diagram of the connection of two adjacent cells of the photovoltaic module of the present invention in other embodiments.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with some aspects of the invention as recited in the appended claims.

The terms used in the present invention are for the purpose of describing particular embodiments only, and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to FIGS. 1 and 2 , the present invention provides a photovoltaic module, which includes a transparent cover plate 10 , an upper encapsulation film 20 , a photovoltaic cell string 30 , a lower encapsulation film 40 and For the back plate 50, the aforementioned components are laminated at high temperature by a laminator to form a whole. The photovoltaic cell strings are drawn out through bus bars (not shown) and connected to a junction box (not shown).

As shown in FIG. 2 , the photovoltaic cell string 30 includes a plurality of cell sheets 31 and a transparent conductive film 32 connected in series with the cell sheets 31 , wherein the cell sheets 31 are busbarless cell sheets, namely the cell sheets 31 . There is no bus bar on the light-receiving surface of the battery, only a number of thin grid electrodes 33 parallel to each other are provided, and the conductive film 32 is in the shape of a sheet, which covers the battery sheet 31, specifically , in two adjacent battery sheets 31, half of the conductive film 32 covers the light-receiving surface of one battery sheet 31, and the other half of the conductive film 32 covers the backlight surface of the other battery sheet 31, thereby The two adjacent battery sheets 31 are connected in series by the conductive film 32 . The conductive film 32 covers the entire light-receiving surface and the entire backlight surface of the battery sheet 31 , that is, the width of the conductive film 32 is equal to the width of the battery sheet 31 .

It is worth mentioning that the thickness of the conductive film 32 is 10-100 μm, which includes a substrate (not shown) and a conductive layer (not shown) covering the surface of the substrate, and the surface of the conductive layer passes through The adhesive is bonded to the battery sheet 31 , therefore, there is an adhesive layer (not shown) between the conductive film 32 and the battery sheet 31 . The conductive film 32 interconnects two adjacent cell sheets 31 , and the fine grid electrode 33 on the light-receiving surface of the cell sheet 31 collects current and directly transmits it to the adjacent cell sheet 31 through the conductive film 32 . The conductive film 32 is made of transparent material.

In addition, in other embodiments of the present invention, the conductive film 32 may also be in the shape of a belt. As shown in FIG. 3 , in this embodiment, the light-receiving surface of the battery sheet 31 is provided with a plurality of thin strips arranged in parallel. Grid line electrode 33 , and the lengthwise extending direction of the thin grid line electrode 33 and the extending direction of the strip-shaped conductive film 32 are perpendicular to each other, and one end of the strip-shaped conductive film 32 is connected to one end of the thin grid line electrode 33 .

In the present invention, a whole piece of conductive film 32 is used to cover the battery slices 31 to connect the adjacent battery slices 31 in series, instead of the traditional welding method. The design of the wire electrode avoids the adverse effect of the ribbon and the busbar wire electrode on the light-receiving area of the cell 31 , which is beneficial to improve the electrical performance of the cell 31 .

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall include within the scope of protection of the present invention.

Claims (7)

1. a kind of photovoltaic module, including transparent cover plate, photovoltaic cell string and backboard, which is characterized in that the photovoltaic cell string packet The transparent conductive film of several cell pieces and the concatenation cell piece is included, the cell piece is dereliction grid line cell piece, light Several thin gate line electrodes being parallel to each other are provided only on face, the transparent conductive film is bonded on two neighboring cell piece.

2. photovoltaic module as described in claim 1, which is characterized in that the width of the transparent conductive film and the cell piece Width it is equal.

3. photovoltaic module as claimed in claim 2, which is characterized in that the transparent conductive film covers photovoltaic cell Entire light-receiving surface.

4. photovoltaic module as claimed in claim 3, which is characterized in that in two adjacent cell pieces, the electrically conducting transparent One end of film is covered on the light-receiving surface of a cell piece, and the other end is then covered on the shady face of another cell piece.

5. photovoltaic module as claimed in claim 4, which is characterized in that the transparent conductive film is in rectangular sheet.

6. photovoltaic module as described in claim 1, which is characterized in that the transparent conductive film is in band-like.

7. photovoltaic module as claimed in claim 6, which is characterized in that the length extending direction of the thin gate line electrode with it is band-like The extending direction of conductive film is mutually perpendicular to, and one end of the strip-shaped conductive film is connected to the one of the thin gate line electrode End.