CN216450661U

CN216450661U - Photovoltaic module

Info

Publication number: CN216450661U
Application number: CN202122921636.8U
Authority: CN
Inventors: 张建峰; 付传国; 杨智; 许涛
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; Atlas Sunshine Power Group Co Ltd
Current assignee: CSI Cells Co Ltd; Canadian Solar Inc; Canadian Solar Manufacturing Changshu Inc
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-05-06
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a photovoltaic module, comprising: the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extending direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member; the front bezel, the front bezel is established the front on battery layer, the thickness of front bezel is D, wherein, D satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm; the back plate is arranged on the back surface of the battery layer. According to the photovoltaic module of the present invention, by making the thickness of the front plate D satisfy: d is not less than 0.5mm and not more than 1.6mm, compare with traditional photovoltaic module, when guaranteeing photovoltaic module's structural strength, can alleviate photovoltaic module's weight, make things convenient for photovoltaic module's installation and transportation to the cost of labor when can reducing installation and transportation, and can guarantee photovoltaic module's output.

Description

Photovoltaic module

Technical Field

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

Background

In the related art, in order to fully utilize solar energy and reduce electricity costs of users, more and more manufacturers have started to introduce photovoltaic modules for residential buildings, i.e., to install the photovoltaic modules on roofs and exterior walls and to generate electricity using solar energy. However, the traditional photovoltaic module is heavy in weight, not easy to install and low in installation efficiency, so that the labor cost is high, and meanwhile, danger exists during installation.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a photovoltaic module, which can reduce the weight of the photovoltaic module and facilitate the installation and transportation of the photovoltaic module while ensuring the structural strength of the photovoltaic module.

A photovoltaic module according to an embodiment of the present invention includes: the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extending direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member; the front bezel, the front bezel is established the front on battery layer, the thickness of front bezel is D, wherein, D satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm; the back plate is arranged on the back surface of the battery layer.

According to the photovoltaic module of the embodiment of the utility model, the thickness D of the front plate 2 satisfies the following condition: d is not less than 0.5mm and not more than 1.6mm, compare with traditional photovoltaic module, when guaranteeing photovoltaic module's structural strength, can alleviate photovoltaic module's weight, make things convenient for photovoltaic module's installation and transportation to the cost of labor when can reducing installation and transportation, and can guarantee photovoltaic module's output.

According to some embodiments of the utility model, D further satisfies: d is more than or equal to 0.9mm and less than or equal to 1.3 mm.

According to some embodiments of the utility model, D further satisfies: d is 1.1 mm.

According to some embodiments of the utility model, the photovoltaic module has a weight W, wherein W satisfies: 3.5 kilograms per square meter of not more than 5.5 kilograms per square meter.

According to some embodiments of the utility model, the front plate is a tempered glass plate.

According to some embodiments of the utility model, the back plate has a thickness d, wherein d satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm. .

According to some embodiments of the utility model, the back sheet is a tempered glass sheet.

According to some embodiments of the utility model, the photovoltaic module further comprises: the first packaging adhesive film layer is arranged between the front plate and the front surface of the battery layer.

According to some embodiments of the utility model, a second encapsulating adhesive film layer is disposed between the back sheet and the back side of the battery layer.

According to some embodiments of the utility model, the first and second encapsulating adhesive layers are EVA layers.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a cross-sectional view of a photovoltaic module according to an embodiment of the present invention.

Reference numerals:

10: a photovoltaic module;

1: a battery layer; 2: a front plate; 3: a back plate; 4: a first encapsulation adhesive film layer; 5: and a second packaging adhesive film layer.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being exemplary, and the embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in fig. 1, a photovoltaic module 10 according to an embodiment of the present invention includes a cell layer 1, a front sheet 2, and a back sheet 3.

Specifically, the battery layer 1 includes a plurality of battery strings arranged in a string arrangement direction, each battery string includes a plurality of battery cells arranged in a string extending direction perpendicular to the string arrangement direction, and the plurality of battery cells in each battery string are connected in series by an interconnection structure. Front panel 2 establishes in battery layer 1's front, and front panel 2's thickness is D, and wherein, D satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm. The back plate 3 is arranged on the back surface of the battery layer 1.

For example, in the example of fig. 1, the cell layer 1 is located between the front sheet 2 and the back sheet 3, and the front sheet 2 and the back sheet 3 can protect the cell layer 1 from being damaged during installation and transportation of the photovoltaic module 10. Wherein two adjacent battery pieces in the same battery string can be connected through a plurality of interconnection structural members such as solder strips, a part of the plurality of interconnection structural members is welded on the front surface of one of the two adjacent battery pieces, and another part of the plurality of interconnection structural members is welded on the back surface of the other one of the two adjacent battery pieces, so as to interconnect the plurality of battery pieces into a complete battery string.

When D is less than 0.5mm, the thickness of the front plate 2 is thin, and the structural strength of the photovoltaic module 10 is affected; when D is larger than 1.6mm, the thickness of the front plate 2 is thicker, on one hand, the weight of the photovoltaic module 10 is increased, and the photovoltaic module 10 is not easy to install and transport; on the other hand, the light transmittance of the front plate 2 is affected, and the output power of the photovoltaic module 10 is reduced. Thus, by making D satisfy: d is more than or equal to 0.5mm and less than or equal to 1.6mm, the weight of the photovoltaic module 10 can be reduced while the structural strength of the photovoltaic module 10 is ensured, the photovoltaic module 10 is convenient to install and transport, and the output power of the photovoltaic module 10 can be ensured.

According to the photovoltaic module of the embodiment of the utility model, the thickness D of the front plate 2 satisfies the following condition: d is more than or equal to 0.5mm and less than or equal to 1.6mm, compared with the traditional photovoltaic module, the weight of the photovoltaic module 10 can be reduced while the structural strength of the photovoltaic module 10 is ensured, the photovoltaic module 10 is convenient to install and transport, therefore, the labor cost in installation and transportation can be reduced, and the output power of the photovoltaic module 10 can be ensured.

In some alternative embodiments, D may further be 0.9mm ≦ D ≦ 1.3 mm. Thereby, the weight of the photovoltaic module 10 can be further reduced while further ensuring the structural strength of the photovoltaic module 10. Optionally, D ═ 1.1 mm.

In some alternative embodiments, the photovoltaic module 10 has a weight W, where W satisfies 3.5 kilograms per square meter and ≦ W ≦ 5.5 kilograms per square meter. With this arrangement, the weight of the photovoltaic module 10 per unit area can be reduced, so that the photovoltaic module 10 can be designed to be lightweight. Wherein the weight W of the photovoltaic module 10 can take 4.5 kilograms per square meter.

In some alternative embodiments, the front panel may be a tempered glass panel. For example, the tempered glass sheet may be a chemically tempered glass sheet. Chemical tempering means that the potassium and sodium ions in alkali salt solution are replaced and cooled to realize compressive stress in glass, and the chemically tempered glass has high impact strength, high bending strength and good optical performance. Thereby, the optical and mechanical properties of the photovoltaic module 10 can be effectively ensured.

In some alternative embodiments, the thickness of the back plate 3 is d, wherein d satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm. When d is less than 0.5mm, the thickness of the back plate 3 is thin, which affects the structural strength of the photovoltaic module 10; when d > 1.6mm, the thickness of the backsheet 3 is thick, which increases the weight of the photovoltaic module 10, making the photovoltaic module 10 difficult to install and transport. Therefore, d is more than or equal to 1.6mm when d is more than or equal to 0.5mm, so that the structural strength of the photovoltaic module 10 can be ensured, the weight of the photovoltaic module 10 can be reduced, the photovoltaic module 10 is convenient to install and transport, and the labor cost in installation and transportation can be further reduced.

Optionally, the back plate 3 is a tempered glass plate. For example, when photovoltaic module 10 is a dual-glass module, by setting back panel 3 to a tempered glass plate, the light transmittance of back panel 3 can be increased, thereby increasing the double-sided rate of photovoltaic module 10, improving the photoelectric conversion efficiency of photovoltaic module 10, and further improving the output power of photovoltaic module 10.

According to some embodiments of the present invention, the photovoltaic module further includes a first encapsulant layer 4, the first encapsulant layer 4 is disposed between the front plate 2 and the front surface of the cell layer 1 to firmly fix the front plate 2 on the front surface of the cell layer 1, and the first encapsulant layer 4 can space the front surface of the cell layer 1 from the outside, so as to prevent moisture and the like from entering into the cell layer 1 and affecting the output power of the photovoltaic module 10.

According to some embodiments of the present invention, the photovoltaic module further includes a second encapsulant layer 5, the second encapsulant layer 5 is disposed between the back sheet 3 and the back surface of the battery layer 1 to firmly fix the back sheet 3 on the back surface of the battery layer 1, and the second encapsulant layer 5 can space the back surface of the battery layer 1 from the outside, so as to prevent moisture and the like from entering into the battery layer 1 and affecting the output power of the photovoltaic module 10.

With reference to fig. 1, after the first packaging adhesive film layer 4 and the second packaging adhesive film layer 5 are cured, the first packaging adhesive film layer 4 and the second packaging adhesive film layer 5 can wrap the battery layer 1 from the front side and the back side of the battery layer 1, so as to completely separate the battery layer 1 from the outside, prevent water vapor and the like from entering the battery layer 1, protect the battery layer 1 by the first packaging adhesive film layer 4 and the second packaging adhesive film layer 5, and prevent the battery layer 1 from being damaged during installation and transportation.

Optionally, the first and second encapsulating adhesive layers 4 and 5 may be EVA films. EVA is a copolymer of ethylene and vinyl acetate, wherein the EVA is a thermosetting hot melt adhesive without viscosity at normal temperature, so that the EVA is convenient to operate, and is melted, bonded, crosslinked and cured after being hot-pressed under certain conditions to become completely transparent.

EVA has excellent flexibility, impact resistance, optical transparency, adhesion, environmental stress cracking resistance and heat sealability. On the one hand, the front sheet 2 and the back sheet 3 can be reliably bonded to the battery layer 1; on the other hand, the transmittance of the glass can be improved after the EVA and the glass are bonded, so that the photoelectric conversion efficiency of the photovoltaic module 10 can be improved.

Other constructions and operations of the photovoltaic module 10 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

the battery layer comprises a plurality of battery strings, the battery strings are arranged along a string arrangement direction, each battery string comprises a plurality of battery sheets which are arranged along a battery string extending direction perpendicular to the string arrangement direction, and the battery sheets in each battery string are connected in series through an interconnection structural member;

the front bezel, the front bezel is established the front on battery layer, the thickness of front bezel is D, wherein, D satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm;

the back plate is arranged on the back surface of the battery layer.

2. The photovoltaic module of claim 1, wherein D further satisfies: d is more than or equal to 0.9mm and less than or equal to 1.3 mm.

3. The photovoltaic module of claim 2, wherein D further satisfies: d is 1.1 mm.

4. The photovoltaic module of claim 1, wherein the photovoltaic module has a weight W, wherein W satisfies: 3.5 kilograms per square meter of not more than 5.5 kilograms per square meter.

5. The photovoltaic module of claim 1, wherein the front sheet is a tempered glass sheet.

6. The photovoltaic module of claim 1, wherein the back sheet has a thickness d, wherein d satisfies: d is more than or equal to 0.5mm and less than or equal to 1.6 mm.

7. The photovoltaic module of claim 1 wherein the backsheet is a tempered glass sheet.

8. The photovoltaic module of any of claims 1-7, further comprising:

the first packaging adhesive film layer is arranged between the front plate and the front face of the battery layer.

9. The photovoltaic module of claim 8, further comprising:

and the second packaging adhesive film layer is arranged between the back plate and the back surface of the battery layer.

10. The photovoltaic module of claim 9 wherein the first and second encapsulant layers are EVA layers.