Photovoltaic module
Technical field
The utility model relates to photovoltaic art more particularly to a kind of photovoltaic modulies.
Background technique
With the development of solar energy industry, market is higher and higher to the generating efficiency requirement of photovoltaic module, gradually appears each
Kind novel high efficiency product, such as imbrication photovoltaic module, generating electricity on two sides component etc..Conventional photovoltaic module includes transparency cover
Plate, backboard and the packaging adhesive film being packaged between transparent cover plate and backboard and battery strings, light self-induced transparency cover board enter photovoltaic group
Part inside and the surface for being irradiated to battery strings, realize photoelectric conversion, and battery strings have a large amount of cell piece to concatenate, and battery
The surface of piece is equipped with the gate line electrode for collecting electric current, is concatenated between adjacent cell piece by welding.It is well known that photovoltaic
The electrical property of cell piece and its light-receiving surface area also direct relation, and the gate line electrode that cell piece surface is covered with can then sacrifice portion
Divide light-receiving area, so that the partial region of cell piece is blocked by gate line electrode and can not generate photogenerated current, and then can not
Maximize the generating efficiency of cell piece.Moreover, to the accurate of technique and equipment by the way of welding connection between cell piece
Degree requirement is all very high, and making technology is relative complex.
Utility model content
In view of this, the present invention provides a kind of photovoltaic modulies, insufficient, electric to improve light-receiving area in the prior art
The bad problem of performance.
Specifically, the utility model is achieved by the following technical solution: a kind of photovoltaic module, including transparent cover plate,
Photovoltaic cell string and backboard, the photovoltaic cell string include the transparent conductive film of several cell pieces and the concatenation cell piece,
The cell piece is dereliction grid line cell piece, is provided only with several thin gate line electrodes being parallel to each other on light-receiving surface, described transparent
On conductive film adhering to two neighboring cell piece.
Further, the width of the transparent conductive film is equal with the width of the cell piece.
Further, the transparent conductive film covers the entire light-receiving surface of photovoltaic cell.
Further, in two adjacent cell pieces, one end of the transparent conductive film is covered in a cell piece
Light-receiving surface on, the other end is then covered on the shady face of another cell piece.
Further, the transparent conductive film is in rectangular sheet.
Further, the transparent conductive film is in band-like.
Further, the extending direction of the length extending direction of the thin gate line electrode and strip-shaped conductive film mutually hangs down
Directly, and one end of the strip-shaped conductive film is connected to one end of the thin gate line electrode.
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, it is matched, cell piece use dereliction gate line electrode design, in this way it is avoided that
Welding, main grid line electrode are conducive to the electrical property for improving cell piece to the adverse effect of cell piece light-receiving area.
Detailed description of the invention
Fig. 1 is the schematic internal view of the utility model photovoltaic module.
Fig. 2 is the connection schematic diagram of the two neighboring cell piece of the utility model photovoltaic module.
Fig. 3 is the connection schematic diagram of the utility model photovoltaic module two neighboring cell piece in other embodiments.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the utility model.On the contrary, they be only with such as
The example of the consistent device and method of some aspects be described in detail in the appended claims, the utility model.
It is only to be not intended to be limiting this reality merely for for the purpose of describing particular embodiments in the term that the utility model uses
With novel.In the "an" of the utility model and singular used in the attached claims, " described " and "the"
Most forms are intended to include, unless the context clearly indicates other meaning.It is also understood that term used herein " and/
Or " refer to and include that one or more associated any or all of project listed may combine.
It please join shown in Fig. 1, Fig. 2, the utility model provides a kind of photovoltaic module comprising what is be from top to bottom sequentially overlapped is saturating
Bright cover board 10, upper layer packaging adhesive film 20, photovoltaic cell string 30, lower layer's packaging adhesive film 40 and backboard 50, aforementioned all parts pass through
Laminating machine forms an entirety after carrying out high temperature lamination, and the photovoltaic cell string is drawn outward by busbar (not shown), and
It accesses in terminal box (not shown).
As shown in Fig. 2, the photovoltaic cell string 30 includes that several cell pieces 31 and concatenation the transparent of cell piece 31 are led
Conductive film 32, wherein the cell piece 31 is dereliction grid line cell piece, i.e. dereliction gate line electrode on the light-receiving surface of cell piece 31
(Bus bar) is provided only with several thin gate line electrodes 33 being parallel to each other, and the conductive film 32 is in the form of sheets, is covered in institute
It states on cell piece 31, specifically, in two cell pieces 31 being disposed adjacent, the half of the conductive film 32 is covered in one
On the light-receiving surface of a cell piece 31, the other half of conductive film 32 is covered on the shady face of another cell piece 31, thus should
Two adjacent cell pieces 31 are connected in series by the conductive film 32.The conductive film 32 covers the cell piece 31
Entire light-receiving surface and entire shady face, that is to say, that the width of the conductive film 32 is equal with the width of cell piece 31.
It is noted that the conductive film 32 with a thickness of 10-100 μm comprising substrate (not shown) and covering
In the conductive layer (not shown) of substrate surface, and the surface of the conductive layer passes through in adhesives to the cell piece 31,
Therefore, there is also adhesive phase (not shown) between the conductive film 32 and cell piece 31.The conductive film 32 will be adjacent
Two cell pieces 31 are interconnected, and the thin gate line electrode 33 on 31 light-receiving surface of cell piece will be directly via institute after collecting electric current
It states conductive film 32 and is transferred to adjacent cell piece 31.The conductive film 32 is transparent material.
In addition, in the utility model other embodiments, the conductive film 32 be also possible to it is band-like, as shown in figure 3,
In the present embodiment, the light-receiving surface of the cell piece 31 is equipped with several thin gate line electrodes 33 disposed in parallel, and thin gate line electrode
33 length extending direction and the extending direction of strip-shaped conductive film 32 is mutually perpendicular to, and one end of the strip-shaped conductive film 32
It is connected to one end of the thin gate line electrode 33.
The utility model is covered on cell piece 31 by using whole piece conductive film 32 and goes here and there adjacent cell piece 31
It picking up and, the mode for replacing traditional welding to weld is matched, and cell piece 31 uses the design of dereliction gate line electrode,
Welding, main grid line electrode are avoided in this way to the adverse effect of 31 light-receiving area of cell piece, are conducive to improve cell piece 31
Electrical property.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent substitution, improvement and etc. done should be included in the utility model
Within the scope of protection.