CN215896420U

CN215896420U - Photovoltaic module

Info

Publication number: CN215896420U
Application number: CN202122440022.8U
Authority: CN
Inventors: 王刚; 夏靖辉; 何晨旭; 徐伟智
Original assignee: Chint Solar (Zhejiang) Co Ltd; Haining Astronergy Technology Co ltd
Current assignee: Chint New Energy Technology Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-02-22
Anticipated expiration: 2031-10-11

Abstract

The utility model provides a photovoltaic module which comprises a front plate glass, a first packaging adhesive film, a battery piece, a second packaging adhesive film and a back plate, wherein the front plate glass, the first packaging adhesive film, the battery piece, the second packaging adhesive film and the back plate are sequentially arranged from top to bottom, a plurality of bulges are arranged on one side, facing the battery piece, of the front plate glass, and the bulges are arranged around the edge of the battery piece. The photovoltaic module and the manufacturing method thereof can improve the space utilization rate of the photovoltaic module, reduce the cost of the module and improve the photoelectric conversion efficiency of the module.

Description

Photovoltaic module

Technical Field

The application relates to the field of photovoltaic power generation, in particular to a photovoltaic module.

Background

With the development of science and technology, more and more attention is paid to the utilization of energy. The role of photovoltaic power generation technology in life is more and more prominent. The photovoltaic power generation technology can convert light energy into electric energy, and the energy in the nature is fully utilized. With the increasing pressure of photovoltaic power generation on the internet at a flat price, it is common consensus in the industry to reduce the cost of photovoltaic module products and increase the generated power per unit area. The current photovoltaic module product still has more space design allowance in the aspect of design, namely on the premise of ensuring safety, and unnecessary waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above technical problems, the present invention provides a photovoltaic module.

The embodiment of the utility model provides a photovoltaic module, which comprises a front plate glass, a first packaging adhesive film, a battery piece, a second packaging adhesive film and a back plate which are sequentially arranged from top to bottom, wherein a plurality of bulges are arranged on one side, facing the battery piece, of the front plate glass, and the bulges are arranged around the edge of the battery piece.

Preferably, the distance between two adjacent protrusions is not more than 2.0 mm.

Preferably, the protrusion is a hemisphere, a cone or a cylinder.

Preferably, a through hole is formed in the first packaging adhesive film at a position corresponding to the front plate glass bump, the diameter of the through hole is larger than that of the bump, and the bump is exposed in the through hole.

Preferably, the height of the bulge is not greater than the distance between the side surface of the front plate glass facing the battery piece and the lower surface of the battery piece.

Preferably, a gap exists between two adjacent battery pieces, and the gap is not more than 1.0 mm.

Preferably, two adjacent battery plates are connected through an interconnection bar to form a battery string.

Preferably, the interconnection bar comprises welding sections respectively welded to two adjacent battery plates and a flat section connected between the welding sections, and the flat section is of a flat plate-shaped structure and is located in a gap between the two adjacent battery plates.

Preferably, the cross-sectional shape of the welding section is semicircular, circular or triangular.

Preferably, the distance between the edge of the cell or bus bar closest to the edge of the front glass plate and the edge of the front glass plate is 10mm to 14.5mm

The utility model has the following beneficial effects: the battery piece is limited in the area defined by the bulges by arranging the bulges on the front plate glass, so that the battery piece is prevented from shifting. Under the condition that the battery piece can not take place the skew, can further reduce photovoltaic module creepage distance and the piece interval between the battery piece to improve photovoltaic module's space utilization, reduce the subassembly cost, promote subassembly photoelectric conversion efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a bump according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is a schematic view of the location of the bumps and vias;

FIG. 4 is a schematic diagram of the creepage distance and cell gap of a photovoltaic module;

FIG. 5 is a schematic structural view of a flat section + semicircular section interconnection bar;

FIG. 6 is a schematic structural view of a semicircular segment + flattened segment + semicircular segment interconnection bar;

FIG. 7 is a schematic structural diagram of a flat-segment + triangular-segment interconnection bar;

FIG. 8 is a schematic structural diagram of a triangular segment + flat segment + triangular segment interconnection bar;

FIG. 9 is a schematic structural view of a conventional circular interconnection bar;

FIG. 10 is a schematic structural view of a circle segment + flat segment + circle segment interconnection bar;

fig. 11 is a schematic view of the attachment of the circle segment + flat segment + circle segment interconnection bar to the cell piece.

Reference numerals:

1. front plate glass, 2, bulges, 3, battery pieces, 4 and through holes.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1 to 4, the present embodiment provides a photovoltaic module, which includes a front glass, a first encapsulant film, a battery piece, a second encapsulant film, and a back sheet sequentially arranged from top to bottom. A plurality of protrusions 2 are arranged on the side of the front plate glass facing the battery piece. The shape of the protrusion 2 may be a hemisphere, a cone, a cylinder, or the like, and this embodiment is not particularly limited. The plurality of protrusions 2 are distributed around the edge of the battery piece to limit the battery piece within the area defined by the plurality of protrusions 2. Simply speaking, the battery plate is clamped in the middle area by a plurality of projections 2. In order to enable the cell to be stressed uniformly, the plurality of protrusions 2 are uniformly distributed around the edge of the cell, and the distance between every two adjacent protrusions 2 is not more than 2.0 mm. Meanwhile, in order to prevent the protrusions 2 from damaging or deforming the back sheet during the lamination assembly of the photovoltaic module, the height of the protrusions 2 is not greater than the distance between the lower surface of the front glass and the upper surface of the back sheet in the assembled state, that is, the height of the protrusions 2 is not greater than the distance between the side of the front glass facing the cell sheet and the lower surface of the cell sheet.

A first packaging adhesive film is laid between the front plate glass 1 and the battery piece. In order to avoid the first packaging adhesive film from being warped due to being jacked up by the bulges 2 and affecting the performance of the first packaging adhesive film. The first packaging adhesive film is provided with a through hole 4 at a position corresponding to the protrusion 2 of the front plate glass 1, and the outline of the through hole 4 is matched with the shape of the protrusion 2. The diameter of the through-hole 4 is slightly larger than that of the projection 2 so that the projection 2 is exposed in the through-hole 4.

Further, the distance between the edge of the cell or bus bar closest to the edge of the front glass plate and the edge of the front glass plate is 10mm to 14.5 mm. A gap exists between two adjacent battery pieces, and the gap is not larger than 1.0 mm. When the distance between the battery pieces 3 is small, if the conventional circular interconnection bar is still used, a relatively obvious slope is formed between the adjacent battery pieces 3, when a certain pressure is applied, the stress cannot be released in time, and the contact points between the battery pieces 3 and the interconnection bar and the periphery are prone to subfissure or even splitting. To avoid or reduce this effect, it is desirable to reduce or eliminate the slope between adjacent cells. The present embodiment utilizes segmented interconnect strips to address this problem.

Specifically, the interconnection bar provided by this embodiment includes a flat section and a welding section, the flat section is in a flat plate structure, the flat section is located in a gap between two adjacent battery pieces 3, two ends of the flat section can be lapped on the two adjacent battery pieces 3, and the welding section is welded on the battery pieces 3. The specific structural form of the interconnection strip can be a flat section + a semicircular section, a semicircular section + a flat section + a semicircular section, a flat section + a triangular section, a triangular section + a flat section + a triangular section and the like. For a conventional circular interconnection bar, a structure of a circular segment + a flat segment + a circular segment can also be formed by flattening the interconnection bar. In either structure of the interconnection strip, the flat sections cover a certain length of the cell area in the inter-sheet gap between the adjacent cell sheets 3 and from both sides of the gap. The flat section can effectively reduce the gradient between adjacent batteries and release stress.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. The utility model provides a photovoltaic module, includes from the top down front bezel glass, first encapsulation glued membrane, battery piece, second encapsulation glued membrane and backplate that set gradually, its characterized in that, front bezel glass orientation one side of battery piece is provided with a plurality of archs, a plurality of archs center on the edge setting of battery piece.

2. The photovoltaic module of claim 1, wherein the distance between two adjacent protrusions is no greater than 2.0 mm.

3. The photovoltaic module of claim 1, wherein the protrusions are hemispheres, cones, or cylinders.

4. The photovoltaic module according to claim 1, wherein the first encapsulant film has a through hole formed at a position corresponding to the front glass bump, the through hole has a diameter larger than that of the bump, and the bump is exposed in the through hole.

5. The photovoltaic module according to claim 1, wherein the height of the protrusion is not greater than the distance between the side of the front glass plate facing the cell sheet and the lower surface of the cell sheet.

6. The photovoltaic module of claim 1, wherein a gap exists between two adjacent cells, and the gap is not greater than 1.0 mm.

7. The photovoltaic module according to claim 1, wherein two adjacent cells are connected by an interconnection bar to form a cell string.

8. The assembly according to claim 7, wherein the interconnection bar comprises soldering segments respectively soldered to two adjacent cells and a flat segment connected between the soldering segments, wherein the flat segment has a plate-like structure and is located in a gap between the two adjacent cells.

9. The photovoltaic module of claim 8, wherein the solder segments have a cross-sectional shape that is semi-circular, or triangular.

10. The photovoltaic module of claim 1, wherein the distance between the edge of the cell or bus bar closest to the edge of the front sheet glass and the edge of the front sheet glass is 10mm to 14.5 mm.