CN111370516A - Photovoltaic module battery piece clearance membrane and photovoltaic module - Google Patents

Abstract

The invention discloses a photovoltaic module cell gap film. The photovoltaic module cell gap film is strip-shaped and arranged between the cells. The photovoltaic module cell gap film is composed of a substrate layer, a glue layer, a reflective layer Layer stacking composition. The invention also discloses a photovoltaic module, which is composed of a front plate, a front encapsulation material layer, a battery layer, a rear encapsulation material layer and a back plate. The gap corresponds to and can completely cover the gap, and the photovoltaic module cell gap film continuously extends along the lateral or vertical cell gap of the photovoltaic module. The photovoltaic module cell gap film has simple structure, simple preparation process, low manufacturing cost, and strong applicability; the photovoltaic module using the photovoltaic module cell gap film can effectively improve the output power of the photovoltaic module.

Description

A photovoltaic module cell gap film and photovoltaic module

technical field

The present invention relates to the technical field of photovoltaic modules, and more specifically relates to a photovoltaic module cell gap film and a photovoltaic module.

Background technique

In the field of new energy, solar energy is the energy type with the greatest development potential and the lowest proportion of development. It is also the only energy source that can eliminate the dependence on fossil energy in resource-poor areas in the future. The development and utilization of solar energy has become the economic development strategy of all countries in the world. In recent years, researchers have focused on the efficient conversion of solar energy to electrical energy based on the photovoltaic effect. At present, in order to make full use of the effective use area of photovoltaic modules, people have carried out detailed analysis and research on the non-cell area of photovoltaic modules, and found that the light incident on the gap between cells in photovoltaic modules is often reflected by regular reflection and is reflected to the Outside the module, or through the module to the ground. The gaps between the cells and between the cell strings essentially occupy the surface area of the photovoltaic cell module, and the gaps cannot participate in energy conversion, so that the sunlight received by this part of the area is wasted, resulting in a reduction in the photoelectric conversion efficiency of the photovoltaic module.

In order to increase the power generation of photovoltaic modules, a reflective film structure layer has been set directly or indirectly on the welding strip on the surface of the cell in many photovoltaic modules, which reflects the light incident on the surface of the welding strip to other parts of the cell for absorption. However, the structure of the existing reflective film itself is relatively complex, and the technical requirements are relatively high; the reflective layer is prepared by the evaporation aluminum plating process, which is difficult to meet the requirements of the aging resistance of the components; in addition, the adhesion between the aluminum layer and the substrate is small, and the Defects are prone to occur in the process.

To sum up, in order to reduce the influence of the non-cell area on the output power of the solar cell, and to reduce the optical loss of the photovoltaic module without increasing the electrical loss of the photovoltaic module, it is necessary to improve the existing photovoltaic modules in the art.

SUMMARY OF THE INVENTION

In view of this, the main purpose of the present invention is to provide a photovoltaic module cell gap film, the photovoltaic module cell gap film is strip-shaped and arranged between the cells, and the photovoltaic module cell gap film is formed by a base The material layer, the glue layer and the reflective layer are superimposed.

Another object of the present invention is to provide a photovoltaic module, which is composed of a front plate, a front encapsulation material layer, a battery layer, a rear encapsulation material layer, and a back plate. The module cell gap corresponds to and can completely cover the gap, and the photovoltaic module cell gap film continuously extends along the lateral or vertical cell gap of the photovoltaic module.

In order to achieve the above purpose, the present invention provides a photovoltaic module cell gap film, comprising a substrate layer, a glue layer and a reflective layer, the glue layer is located on top of the substrate layer, and the reflective layer is located on the top of the glue layer , the base material layer is compounded with the reflective layer through the glue layer, the gap film sheet is obtained after curing, and the strip-shaped photovoltaic module cell gap film is obtained after the slitting and slitting process.

Preferably, the base material layer includes an adhesive layer and a base layer, the base layer is located on top of the adhesive layer, and the glue layer is located on the top of the base layer; the base layer is connected to the base layer through the glue layer. The reflective layer is compounded.

Preferably, the width of the photovoltaic module cell gap film is 1-50 mm, and the thickness is 32-255 μm.

Preferably, the thickness of the glue layer is 2-15 μm.

Preferably, the thickness of the reflective layer is 10-50 μm.

Preferably, the reflective layer adopts a film material prepared from a fluorine-containing resin mixture or a coating prepared from a fluorine-containing slurry.

Preferably, the thickness of the adhesive layer is 10-90 μm, and the thickness of the base layer is 10-100 μm.

The present invention also provides a photovoltaic module, which adopts the photovoltaic module cell gap film, including a top-down front plate, a front encapsulation material layer, a battery layer, a rear encapsulation material layer, and the photovoltaic module cell gap film. and the backplane, the position of the photovoltaic module cell gap film corresponds to the gap between the cell sheets in the cell layer and completely covers the gap.

Preferably, the photovoltaic module cell gap films are arranged longitudinally and laterally on the backplane corresponding to the gaps between the cell sheets according to the distribution mode of the cell sheets in the cell layer, and are thermally adhered and fixed on the backplane.

Compared with the prior art, the advantages of the photovoltaic module cell gap film and the photovoltaic module disclosed in the present invention are: the photovoltaic module cell gap film has a simple structure, simple preparation process and low manufacturing cost; The photovoltaic module cell gap film and the photovoltaic module have strong applicability; the photovoltaic module using the photovoltaic module cell gap film can effectively improve the output power of the photovoltaic module.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a photovoltaic module cell gap film of the present invention.

FIG. 2 is a schematic cross-sectional view of a photovoltaic module of the present invention.

FIG. 3 is a schematic diagram of a photovoltaic module cell gap film thermally attached to the backplane of the present invention.

Detailed ways

As shown in FIG. 1 , a photovoltaic module cell gap film 20 of the present invention is in the shape of a strip, and includes a substrate layer 21 , a glue layer 22 and a reflective layer 23 , and the glue layer 22 is located on the top of the substrate layer 21 . The reflective layer 23 is located on top of the glue layer 22 . The base material layer 21 further includes an adhesive layer 211 and a base layer 212 , the base layer 212 is located on the top of the adhesive layer 211 , and the glue layer 22 is located on the top of the base layer 212 . The base layer 212 is compounded with the reflective layer 23 through the glue layer 22, and after curing, a gap film sheet is obtained, and then the photovoltaic module cell gap film 20 is obtained after a slitting and slitting process. The width of the photovoltaic module cell gap film is 1-50 mm, and the thickness is 32-255 μm.

Specifically, the thickness of the adhesive layer 211 is 10-90 μm, the thickness of the base layer 212 is 10-100 μm, the thickness of the glue layer 22 is 2-15 μm, and the thickness of the reflective layer 23 is 10-10 μm. 50μm.

The reflective layer 23 is made of a film material prepared from a fluorine-containing resin mixture or a coating prepared from a fluorine-containing slurry. The preparation process of the photovoltaic module cell gap film 20 is simple and the production cost is low.

As shown in FIG. 2 , the photovoltaic module includes a front plate 40 , a front encapsulation material layer 31 , a battery layer 30 , a rear encapsulation material layer 32 , the photovoltaic module cell gap film 20 and the back plate 10 from top to bottom. The position of the photovoltaic module cell gap film 20 corresponds to the gap between the cells in the cell layer 30 and can completely cover the gap.

As shown in FIG. 3 , the photovoltaic module cell gap film 20 is arranged longitudinally and laterally on the back plate 10 corresponding to the gaps between the cells according to the distribution mode of the cells in the cell layer 30 , and is thermally fixed on the back plate 10 . on the backplane 10 . The photovoltaic module cell gap film 20 is superimposed at the transverse and longitudinal cross positions of the cell gap.

The specific application of the photovoltaic module cell gap film 20 in a single-glass photovoltaic module is specifically explained: take a single-glass photovoltaic module containing 72 cells as an example (other specifications of single-glass photovoltaic modules are also applicable), first take the specifications Suitable for the backplane 10, the backplane 10 can be selected from different types of backplanes (such as coating type, co-extrusion type, etc.) available in the market, and the contact surface with the rear encapsulation material layer 32 is selected, corresponding to At the positions of the cell gaps in the cell layer 30 , the photovoltaic module cell gap films 20 are thermally attached to the backplane 10 along the lateral and longitudinal directions of the backplane 10 , respectively. Then, the back sheet 10 affixed with the photovoltaic module cell gap film 20 is applied to prepare a photovoltaic module to obtain a single-glass photovoltaic module with a gap film between the cells and between the strings of the corresponding module.

The specific application of the photovoltaic module cell gap film 20 in the double-glass photovoltaic module is explained in detail: first, a back plate glass with a suitable specification is selected as the back plate 10, and the back plate glass can be selected from ordinary flat glass or ordinary float tempered glass. Other types of glass commonly used in the market, select the contact surface with the rear encapsulation material layer 32 on the back glass, corresponding to the position of the cell gap in the battery layer 30, respectively along the back glass in the lateral and longitudinal directions. The photovoltaic module cell gap film 20 is thermally attached to the back glass, and then the back glass with the photovoltaic module cell gap film 20 is applied to prepare a photovoltaic module to obtain the inter-cell ratio of the corresponding module. Double-glass photovoltaic modules with gap films between strings.

By arranging the photovoltaic module cell gap film 20 in the single-glass or double-glass photovoltaic module, the non-cell area of the photovoltaic module can be fully utilized, so that the sunlight incident on the photovoltaic module can be fully utilized , which can increase the output power of photovoltaic modules by 1-2%.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A photovoltaic module cell gap film, characterized in that it comprises a base material layer, a glue layer and a reflective layer, wherein the glue layer is located on the top of the base material layer, and the reflective layer is located on the top of the glue layer. The base material layer is compounded with the light-reflecting layer through the glue layer, and the gap film is obtained after curing, and the strip-shaped photovoltaic module cell gap film is obtained after the slitting and slitting process. 2 . The photovoltaic module cell gap film of claim 1 , wherein the substrate layer comprises an adhesive layer and a base layer, the base layer is located on top of the adhesive layer, and the glue layer is located on the top of the adhesive layer. 3 . The top of the base layer; the base layer is combined with the reflective layer through the glue layer. 3 . The photovoltaic module cell gap film according to claim 1 , wherein the photovoltaic module cell gap film has a width of 1-50 mm and a thickness of 32-255 μm. 4 . 4 . The photovoltaic module cell gap film according to claim 1 , wherein the glue layer has a thickness of 2-15 μm. 5 . 5 . The photovoltaic module cell gap film according to claim 1 , wherein the thickness of the light-reflecting layer is 10-50 μm. 6 . 6 . The photovoltaic module cell gap film according to claim 1 , wherein the light-reflecting layer adopts a film material prepared from a fluorine-containing resin mixture or a coating prepared from a fluorine-containing slurry. 7 . 7 . The photovoltaic module cell gap film according to claim 2 , wherein the thickness of the adhesive layer is 10-90 μm, and the thickness of the base layer is 10-100 μm. 8 . 8. A photovoltaic module, using the photovoltaic module cell gap film according to any one of claims 1 to 7, characterized in that, comprising a top-down front plate, a front encapsulation material layer, a battery layer, a rear The packaging material layer, the photovoltaic module cell gap film and the back sheet, the position of the photovoltaic module cell gap film corresponds to the gap between the cells in the battery layer and completely covers the gap. 9 . The photovoltaic module according to claim 8 , wherein the cell gap film of the photovoltaic module corresponds to the vertical and horizontal gaps between the cells on the back plate according to the distribution mode of the cells in the cell layer. 10 . Arranged horizontally, the thermal paste is fixed on the back panel.

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