CN221041150U - Photovoltaic module - Google Patents

Abstract

The application relates to a photovoltaic module, comprising: the front glass layer, the first packaging adhesive film layer, the battery piece layer, the second packaging adhesive film layer and the back plate layer are sequentially stacked; the battery piece layer comprises a plurality of battery pieces which are arranged at intervals; the photovoltaic module further comprises a diopter lens, the diopter lens is arranged between the front glass layer and the battery piece layer, the projection of the diopter lens on the battery piece layer is located in a non-battery piece area of the battery piece layer, and the non-battery piece area comprises a clearance area between adjacent battery pieces and peripheral areas around the battery pieces; when light rays penetrate through the front glass layer and are incident to the diopter lens, the diopter lens can refract the light rays to the battery piece. Therefore, the photovoltaic module can utilize light rays in the non-battery piece area of the battery piece layer, so that the light ray utilization is improved, the optical path is short, the loss is small, and the light ray utilization rate is effectively improved.

Description

Photovoltaic module

Technical Field

The application relates to the technical field of photovoltaic modules, in particular to a photovoltaic module.

Background

The photovoltaic module generally includes a front glass layer, a first packaging adhesive film layer, a cell layer, a second packaging adhesive film layer, and a backsheet layer. In order to improve the light utilization rate of the photovoltaic module, some technical schemes in the prior art are that a gap film with a light reflection effect is arranged between a back plate layer and a second packaging adhesive film layer, the position of the gap film corresponds to a gap area between adjacent battery pieces in the battery piece layers, when light is emitted into the photovoltaic module from a front glass layer to reach the gap film, the light is reflected by the gap film and then reaches the front glass layer, and the light is reflected again at a glass-air interface and then emitted onto the battery pieces, so that the light at the gap between the battery pieces is utilized through the gap film, and the light utilization rate is improved.

However, in this technical solution, the light utilization rate is still low, because the light is diffusely reflected when being reflected by the gap film, and part of the light is not reflected to the battery piece when passing through the glass-air interface after being reflected, but is emitted to the outside of the photovoltaic module; when the light is reflected again at the glass-air interface, part of the light cannot reach the battery piece, but is reflected to a blank area around the battery piece; light is reflected for many times in the photovoltaic module, and loss is large.

Disclosure of Invention

Based on this, it is necessary to provide a photovoltaic module for solving the problem that the light utilization rate of the prior art is still low by providing a gap film with a reflective effect between the back plate layer and the second packaging film layer.

A photovoltaic module, the photovoltaic module comprising: the front glass layer, the first packaging adhesive film layer, the battery piece layer, the second packaging adhesive film layer and the back plate layer are sequentially stacked; the battery piece layer comprises a plurality of battery pieces which are arranged at intervals;

The photovoltaic module further comprises a diopter lens, wherein the diopter lens is arranged between the front glass layer and the battery piece layer, the projection of the diopter lens on the battery piece layer is positioned in a non-battery piece area of the battery piece layer, and the non-battery piece area comprises a clearance area between adjacent battery pieces and a peripheral area around the battery pieces; when light rays penetrate through the front glass layer and are incident to the diopter lens, the diopter lens can refract the light rays onto the battery piece.

In an embodiment, the diopter lens is located in the first packaging film layer.

In an embodiment, the projection of at least one of the diopter lenses on the battery piece layer is located in a peripheral area around the plurality of battery pieces; and/or, the projection of at least one diopter lens on the battery sheet layer is positioned in the gap area.

In an embodiment, the refractive lens is any one of a micro-prism structure, a fresnel lens structure, a concave lens structure, or a convex lens structure.

In an embodiment, the refractive lens projected to be located in the gap area includes a first refractive portion and a second refractive portion which are symmetrically disposed, an arrangement direction of the first refractive portion and the second refractive portion is the same as an arrangement direction of two battery pieces on two sides of the gap area, and the first refractive portion and the second refractive portion are respectively used for refracting light passing through the front glass layer onto the battery pieces adjacent to the front glass layer.

In an embodiment, the diopter lens is a micro prism structure, and a side of the first diopter part and a side of the second diopter part facing the battery piece layer are respectively provided with a plurality of triangular prism structures; the distance from the triangular prism structures of the first refraction portion to the battery piece layer gradually decreases or the distance from the triangular prism structures of the first refraction portion to the battery piece layer is equal along the direction that the first refraction portion is far away from the second refraction portion.

In one embodiment, the triangular prism structure has a first surface and a second surface adjacent to each other, and a junction between the first surface and the second surface forms a sharp corner facing the battery sheet layer; the first surface and the second surface are both plane surfaces, or one of the first surface and the second surface is a plane surface, and the other is an arc surface.

In an embodiment, the light exit surface of the first refractive portion is a plane, and a distance from the light exit surface of the first refractive portion to the battery slice layer gradually decreases along a direction in which the first refractive portion is away from the second refractive portion.

In one embodiment, the diopter lens projecting the peripheral region around the plurality of cells is used for refracting the light passing through the front glass layer onto the cells adjacent to the diopter lens.

In an embodiment, the photovoltaic module further includes a gap film disposed between the back plate layer and the second packaging film layer, and a projection of the gap film on the cell layer is located in a gap area between adjacent cells.

According to the photovoltaic module provided by the embodiment of the application, as the projection of the diopter lens on the battery piece layer is positioned in the non-battery piece area of the battery piece layer, when light rays penetrate through the front glass layer and are incident on the diopter lens, the diopter lens refracts the light rays onto the battery piece, so that the photovoltaic module can utilize the light rays in the non-battery piece area of the battery piece layer, and the light ray utilization rate is improved. Compared with the technical scheme of utilizing the gap film to reflect in the prior art, the diopter lens is arranged between the front glass layer and the battery piece layer, and the diopter lens refracts the light passing through the front glass layer to the battery piece, so that the light path is short, the loss is small, and the light utilization rate is effectively improved.

In addition, the material of the gap film with the light reflection effect in the conventional technology is usually required to be conductive, and the peripheral areas of the plurality of battery pieces are provided with bus bars and other components, so that the peripheral areas of the plurality of battery pieces are not suitable for arranging the gap film. In the embodiment of the application, the light utilization rate can be improved by refracting the light through the diopter lens, and the diopter lens is not required to be conductive and can be made of non-conductive materials, so that the diopter lens can be arranged in the peripheral area around the plurality of battery pieces, and the light incident into the peripheral area around the plurality of battery pieces can be utilized, so that the light utilization rate is further improved.

Drawings

Fig. 1 is a schematic structural diagram of a photovoltaic module according to an embodiment.

Fig. 2 is a schematic view of a cell layer of the photovoltaic module of fig. 1.

Fig. 3 is a schematic structural diagram of a photovoltaic module according to another embodiment.

Fig. 4 is a schematic structural view of a photovoltaic module according to yet another embodiment.

Fig. 5 is a schematic structural diagram of a photovoltaic module according to still another embodiment.

Reference numerals illustrate: 10. light rays; 100. a front glass layer; 200. a first packaging adhesive film layer; 300. a battery sheet layer; 310. a battery sheet; 320. a gap region; 330; a peripheral region; 400. a refractive lens; 410. a first refractive portion; 411. a light exit surface of the first refractive portion; 420. a second refractive portion; 421. a light exit surface of the second refractive portion; 430. a triangular prism structure; 431. a first surface; 432. a second surface; 433. sharp corners.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Some technical schemes in the prior art set up the gap film that has the reflection of light effect between backplate layer and second encapsulation glued membrane layer, the position of gap film corresponds with the clearance region between the adjacent battery piece in the battery piece layer, and when light penetrated into photovoltaic module from positive glass layer and arrived the gap film department, through the gap film reflection, reach positive glass layer again, thereby reflect and shoot on the battery piece again at glass-air interface, so, then utilized the light of clearance department between the battery piece through the gap film, improved light utilization ratio. However, in this technical solution, the light utilization rate is still low, because the light is diffusely reflected when being reflected by the gap film, and part of the light is not reflected to the battery piece when passing through the glass-air interface after being reflected, but is emitted to the outside of the photovoltaic module; when the light is reflected again at the glass-air interface, part of the light cannot reach the battery piece, but is reflected to a blank area around the battery piece; light is reflected for many times in the photovoltaic module, and loss is large. In addition, the gap film is only suitable for being arranged at the gap area between the adjacent battery pieces, the peripheral areas of the plurality of battery pieces are not suitable for being arranged with the gap film, and the waste of light rays incident to the peripheral areas of the plurality of battery pieces is caused, because the peripheral areas of the plurality of battery pieces are provided with bus bars and other components, and have insulation requirements, and therefore, the arrangement of the gap film can challenge the creepage requirements.

Referring to fig. 1 and 2, an embodiment of the present application provides a photovoltaic module, which includes: the front glass layer 100, the first packaging adhesive film layer 200, the battery sheet layer 300, the second packaging adhesive film layer (not shown), and the back plate layer (not shown) are sequentially stacked. The battery sheet layer 300 includes a plurality of battery sheets 310 disposed at intervals from each other. The photovoltaic module further includes a diopter lens 400, wherein the diopter lens 400 is disposed between the front glass layer 100 and the battery sheet layer 300, and the projection of the diopter lens 400 on the battery sheet layer 300 is located in a non-battery-sheet area of the battery sheet layer 300, and the non-battery-sheet area includes a gap area 320 between adjacent battery sheets 310 and a peripheral area 330 around the plurality of battery sheets 310. When the light 10 is incident on the diopter lens 400 through the front glass layer 100, the diopter lens 400 can refract the light 10 onto the battery plate 310.

In the photovoltaic module according to the embodiment of the present application, since the projection of the refractive lens 400 on the battery layer 300 is located in the non-battery area of the battery layer 300, when the light 10 is incident on the refractive lens 400 through the front glass layer 100, the refractive lens 400 refracts the light 10 onto the battery piece 310, so that the photovoltaic module can utilize the light in the non-battery area of the battery layer 300, thereby improving the light utilization rate. Compared with the technical scheme of utilizing the gap film reflection in the prior art, the diopter lens 400 is arranged between the front glass layer 100 and the battery piece layer 300, and the diopter lens 400 refracts the light 10 passing through the front glass layer 100 to the battery piece 310, so that the light path is short, the loss is small, and the light utilization rate is effectively improved.

In addition, the material of the gap film with the light reflection effect in the conventional technology is usually required to be conductive, and the peripheral areas of the plurality of battery pieces are provided with bus bars and other components, so that the peripheral areas of the plurality of battery pieces are not suitable for arranging the gap film. In the embodiment of the present application, the refractive lens 400 is used for refracting the light to improve the light utilization rate, and the refractive lens 400 is not required to be conductive and may be made of a non-conductive material, so that the refractive lens 400 may be disposed in the peripheral area 330 around the plurality of battery pieces 310, thereby further improving the light utilization rate by utilizing the light incident into the peripheral area 330 around the plurality of battery pieces 310.

In addition, the diopter lens 400 has little influence on the appearance of the photovoltaic module due to the transparent lens structure, so that the diopter lens can be applied to a single-sided photovoltaic module, a double-sided photovoltaic module, a transparent photovoltaic module and the like, the light utilization rate can be improved, and the diopter lens is wide in application range.

Wherein, regarding the projection of the diopter lens 400 on the battery sheet 300 is located on the non-battery sheet area of the battery sheet 300, specifically, the projection of the diopter lens 400 on the battery sheet 300 may be entirely located on the non-battery sheet area of the battery sheet 300; the projection of the diopter lens 400 onto the battery plate layer 300 may also be mostly located on the non-battery plate area of the battery plate layer 300, with the projected edge being located on the battery plate 310.

As shown in fig. 1, in one embodiment, the projection of at least one diopter lens 400 onto the cell layer 300 is located at the gap region 320 of the adjacent cell 310, so that the photovoltaic module can utilize the light of the gap region 320 of the adjacent cell 310. Preferably, the gap regions 320 of the pairs of adjacent battery cells 310 are correspondingly provided with diopter lenses 400.

In an embodiment, the projection of the at least one diopter lens 400 on the battery layer 300 is located at the peripheral region 330 around the plurality of battery pieces 310, so that the photovoltaic module can utilize the light of the peripheral region 330 around the plurality of battery pieces 310. Preferably, a plurality of diopter lenses 400 are correspondingly arranged in the peripheral area 330 around the plurality of battery pieces 310.

In an embodiment, the projection of at least one diopter lens 400 on the battery layer 300 is located in the gap area 320 of the adjacent battery piece 310, and the projection of at least one diopter lens 400 on the battery layer 300 is located in the peripheral area 330 around the plurality of battery pieces 310, so that the photovoltaic module can utilize the light of the gap area 320 of the adjacent battery pieces 310 and the light of the peripheral area 330 around the plurality of battery pieces 310, thereby fully improving the light utilization rate.

In one embodiment, the diopter lens 400 is any one of a micro-prism structure, a fresnel lens structure, a concave lens structure, or a convex lens structure, as long as it is capable of refracting the light 10 passing through the front glass layer 100 onto the battery cell 310.

In an embodiment, the refractive lens 400 is located in the first packaging film layer 200, that is, the refractive lens 400 and the first packaging film layer 200 are located in the same layer, so that the light incident to the refractive lens 400 through the front glass layer 100 does not need to pass through the film of the first packaging film layer 200, and can be refracted to the battery piece 310 only through the front glass layer 100 and the refractive lens 400, thereby sufficiently reducing the light loss and further effectively improving the light utilization rate.

Specifically, in the internal structure of the photovoltaic module of the present embodiment, an opening area for accommodating the diopter lens 400 is formed in the first packaging film layer 200, and the diopter lens 400 is located in the opening area.

In other embodiments, the diopter lens may also be disposed between the first packaging film layer and the front glass layer, or between the first packaging film layer and the battery plate layer.

Referring to fig. 1, 3, 4 and 5, in some embodiments, the dioptric lens 400 projected to the interstitial region 320 includes a first dioptric portion 410 and a second dioptric portion 420 symmetrically disposed. The arrangement direction of the first refractive portion 410 and the second refractive portion 420 is the same as the arrangement direction of the two battery pieces 310 at both sides of the gap region 320 (i.e., arranged in the left-right direction in fig. 1, 3, 4 and 5), and the first refractive portion 410 and the second refractive portion 420 are respectively used to refract the light 10 passing through the front glass layer 100 onto the battery pieces 310 adjacent to themselves.

In fig. 1, 3, 4 and 5, the first refractive portion 410 is used to refract light 10 passing through the front glass layer 100 onto the cell 310 to the left thereof (i.e., adjacent to the first refractive portion 410 itself). The second refractive portion 420 is used to refract light 10 passing through the front glass layer 100 onto the battery plate 310 on its right side (i.e., adjacent to the second refractive portion 420 itself).

Referring to fig. 1, 3 and 4, in some embodiments, the diopter lens 400 is a micro-prism structure, and a side of the first diopter portion 410 and the second diopter portion 420 facing the battery layer 300 respectively has a plurality of triangular prism structures 430, and the light 10 is refracted by the triangular prism structures 430.

Referring to fig. 3, in some embodiments, the distance from the plurality of triangular prism structures 430 of the first refractive portion 410 to the battery sheet 300 gradually decreases in a direction in which the first refractive portion 410 is away from the second refractive portion 420 (i.e., in a direction from right to left in fig. 3). Since the second refractive portion 420 is symmetrically disposed with the first refractive portion 410, the distance from the plurality of triangular prism structures 430 of the second refractive portion 420 to the battery sheet 300 gradually decreases in a direction in which the second refractive portion 420 is away from the first refractive portion 410 (i.e., in a direction from left to right in fig. 3). In this manner, the plurality of triangular prism structures 430 of the first refractive portion 410 and the plurality of triangular prism structures 430 of the second refractive portion 420 form a substantially V-shaped groove.

Referring to fig. 1 and 4, in some embodiments, the triangular prism structures 430 of the first refractive portion 410 are equidistant from the battery sheet 300. Since the second refractive portion 420 is symmetrically disposed with the first refractive portion 410, the plurality of triangular prism structures 430 of the second refractive portion 420 are equidistant from the battery sheet 300.

Referring to fig. 1, 3 and 4, in some embodiments, the triangular prism structure 430 has a first surface 431 and a second surface 432 adjacent to each other, and a corner 433 facing the battery layer 300 is formed at a junction of the first surface 431 and the second surface 432.

Referring to fig. 1, 3 and 4, in the embodiment of the application, the second surface 432 of the triangular prism structure 430 of the first refractive portion 410 is opposite to the second surface 432 of the triangular prism structure 430 of the second refractive portion 420, and the first surface 431 of the triangular prism structure 430 of the first refractive portion 410 is opposite to the first surface 431 of the triangular prism structure 430 of the second refractive portion 420.

Referring to fig. 1 and 3, in some embodiments, the first surface 431 and the second surface 432 are both planar.

Referring to fig. 4, in some embodiments, one of the first surface 431 and the second surface 432 is a plane, and the other is a cambered surface. In the embodiment shown in fig. 4, the first surface 431 is a plane, and the second surface 432 is a cambered surface.

Referring to fig. 5, in other embodiments, the light-emitting surface 411 of the first refractive portion 410 is a plane, and the distance from the light-emitting surface 411 of the first refractive portion 410 to the battery layer 300 gradually decreases along the direction in which the first refractive portion 410 is away from the second refractive portion 420 (i.e., along the direction from right to left in fig. 5). Since the second refractive portion 420 is symmetrically disposed with the first refractive portion 410, the distance from the light exit surface 421 of the second refractive portion 420 to the battery sheet 300 gradually decreases along the direction in which the second refractive portion 420 is away from the first refractive portion 410 (i.e., along the direction from left to right in fig. 5). Thus, the light-emitting surface 411 of the first refractive portion 410 and the light-emitting surface 421 of the second refractive portion 420 form a V-shaped groove.

In still other embodiments, a diopter lens 400 projecting a peripheral region 330 located around the plurality of cells 310 is used to refract the light 10 passing through the front glass layer 100 onto the cells 310 adjacent to itself.

In some embodiments, the photovoltaic module further includes a gap film (not shown) disposed between the backsheet layer and the second encapsulant film layer, the projection of the gap film onto the cell layer 300 being located in the gap region 320 between adjacent cells 310.

Since the diopter lens 400 is located between the front glass layer 100 and the battery piece layer 300 and refracts the light 10 passing through the front glass layer 100 onto the battery piece 310, the refracted light of the diopter lens 400 does not pass through the battery piece layer 300 and reach the gap film, and the reflection of the light by the gap film is not affected, so that the diopter lens 400 and the gap film can be simultaneously applied to the photovoltaic module, and the light utilization rate is further fully improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A photovoltaic module, characterized in that the photovoltaic module comprises: the front glass layer, the first packaging adhesive film layer, the battery piece layer, the second packaging adhesive film layer and the back plate layer are sequentially stacked; the battery piece layer comprises a plurality of battery pieces which are arranged at intervals;

The photovoltaic module further comprises a diopter lens, wherein the diopter lens is arranged between the front glass layer and the battery piece layer, the projection of the diopter lens on the battery piece layer is positioned in a non-battery piece area of the battery piece layer, and the non-battery piece area comprises a clearance area between adjacent battery pieces and a peripheral area around the battery pieces; when light rays penetrate through the front glass layer and are incident to the diopter lens, the diopter lens can refract the light rays onto the battery piece.

2. The photovoltaic module of claim 1, wherein the refractive lens is located within the first encapsulant film layer.

3. The photovoltaic module of claim 1, wherein a projection of at least one of the refractive lenses onto the cell layer is located at a peripheral region around the plurality of cells; and/or, the projection of at least one diopter lens on the battery sheet layer is positioned in the gap area.

4. The photovoltaic module of claim 1, wherein the refractive lens is any one of a micro-prismatic structure, a fresnel lens structure, a concave lens structure, or a convex lens structure.

5. The photovoltaic module according to claim 1, wherein the refractive lens projected to be located in the gap region includes a first refractive portion and a second refractive portion which are symmetrically arranged, and the arrangement directions of the first refractive portion and the second refractive portion are the same as the arrangement directions of the two battery pieces on both sides of the gap region, and the first refractive portion and the second refractive portion are respectively used for refracting the light passing through the front glass layer onto the battery pieces adjacent to the first refractive portion and the second refractive portion.

6. The photovoltaic module according to claim 5, wherein the refractive lens is a micro-prism structure, and a side of the first refractive portion and the second refractive portion facing the cell layer has a plurality of triangular prism structures, respectively; the distance from the triangular prism structures of the first refraction portion to the battery piece layer gradually decreases or the distance from the triangular prism structures of the first refraction portion to the battery piece layer is equal along the direction that the first refraction portion is far away from the second refraction portion.

7. The photovoltaic module of claim 6, wherein the triangular prism structure has adjacent first and second surfaces, the junction of the first and second surfaces forming a sharp corner toward the cell layer; the first surface and the second surface are both plane surfaces, or one of the first surface and the second surface is a plane surface, and the other is an arc surface.

8. The photovoltaic module of claim 5, wherein the light exit surface of the first refractive portion is planar, and the distance from the light exit surface of the first refractive portion to the cell layer decreases gradually along the direction in which the first refractive portion is away from the second refractive portion.

9. The photovoltaic module of claim 1, wherein the refractive lens projecting the peripheral region around the plurality of cells is configured to refract light passing through the front glass layer onto the cells adjacent to itself.

10. The photovoltaic module of claim 1, further comprising a gap film disposed between the backsheet layer and the second encapsulant film layer, a projection of the gap film onto the cell layer being located in a gap region between adjacent cells.