阅读说明：本技术 一种大尺寸光伏组件及制备方法 (Large-size photovoltaic module and preparation method thereof ) 是由 丁晓春 郭晓珍 于 2021-09-09 设计创作，主要内容包括：本发明涉及光伏领域,特别涉及一种大尺寸光伏组件及制备方法,其中大尺寸光伏组件包括光伏主体以及沿围光伏主体边缘围设的边框；所述光伏主体从上至下依次包括钢化玻璃、第一封装胶膜、晶体硅电池片组、第二封装胶膜和背板；所述晶体硅电池片组包括多个排列设置的电池片；钢化玻璃上固定设有支撑件；钢化玻璃上固定设有支撑件；支撑件将钢化玻璃划分成多个抗冲击保护区；每个抗冲击保护区对应放置一个电池片。本发明能够大大提高钢化玻璃的机械载荷能力,提高封装晶体硅电池片组的抗隐裂效果,降低大尺寸光伏组件的功率衰减及其可能的失效风险。(The invention relates to the photovoltaic field, in particular to a large-size photovoltaic module and a preparation method thereof, wherein the large-size photovoltaic module comprises a photovoltaic main body and a frame arranged around the edge of the photovoltaic main body; the photovoltaic main body sequentially comprises toughened glass, a first packaging adhesive film, a crystalline silicon cell set, a second packaging adhesive film and a back plate from top to bottom; the crystalline silicon cell piece group comprises a plurality of arranged cell pieces; the toughened glass is fixedly provided with a supporting piece; the toughened glass is fixedly provided with a supporting piece; the support piece divides the toughened glass into a plurality of impact-resistant protection areas; and a battery piece is correspondingly arranged in each anti-impact protection area. The invention can greatly improve the mechanical load capacity of the toughened glass, improve the anti-subfissure effect of the packaged crystalline silicon cell group and reduce the power attenuation and possible failure risk of the large-size photovoltaic module.)

1. A large-size photovoltaic assembly comprises a photovoltaic main body and a frame arranged around the edge of the photovoltaic main body in a surrounding manner; the photovoltaic main body sequentially comprises toughened glass, a first packaging adhesive film, a crystalline silicon cell set, a second packaging adhesive film and a back plate from top to bottom; the crystalline silicon cell piece group comprises a plurality of arranged cell pieces; the method is characterized in that: the toughened glass is fixedly provided with a supporting piece; the support piece divides the toughened glass into a plurality of impact-resistant protection areas; and a battery piece is correspondingly arranged in each anti-impact protection area.

2. The large-sized photovoltaic module according to claim 1, wherein: the support piece extends towards the back plate, sequentially penetrates through the first packaging adhesive film, the crystalline silicon cell set and the second packaging adhesive film, and then contacts with the back plate to form a support; the supporting piece penetrates through the gaps between the cells of the crystalline silicon cell group.

3. A large-size photovoltaic module according to claim 2, wherein: the supporting pieces are a plurality of supporting tables; the support table and the toughened glass are integrally formed; one or more support platforms form a protection zone against impacts.

4. A large-size photovoltaic module according to claim 2, wherein: the supporting pieces are a plurality of supporting tables; a plurality of grooves which correspond to the supporting platforms one by one are formed in the plane of the toughened glass facing the crystalline silicon cell group; one end of the support platform is inserted into the groove and then fixedly connected with the toughened glass; one or more support platforms form a protection zone against impacts.

5. The large-sized photovoltaic module according to claim 1, wherein: the supporting piece is a reinforcing bracket; the reinforcing support comprises a plurality of transverse supporting bars and a plurality of longitudinal supporting bars; a plurality of impact-resistant protection areas are arranged around the plurality of transverse supporting bars and the plurality of longitudinal supporting bars, and each battery piece is correspondingly arranged in one impact-resistant protection area.

6. The large-sized photovoltaic module according to claim 5, wherein: the reinforced bracket and the toughened glass are integrally formed.

7. The large-sized photovoltaic module according to claim 4, wherein: one end of the support platform inserted into the groove is stuck to the bottom surface of the groove through glue.

8. A large-size photovoltaic module according to claim 2, 3 or 4, characterized in that: the area, through which the supporting piece passes, of the first packaging adhesive film and the second packaging adhesive film is a cutting area.

9. A large-size photovoltaic module according to claim 3 or 4, characterized in that: a support table is correspondingly arranged at the center of a cross-shaped gap formed between every two adjacent battery pieces; an anti-impact protection area is formed among the four support platforms which are distributed in a rectangular shape, and each anti-impact protection area is correspondingly provided with one battery piece.

10. A preparation method of a large-size photovoltaic module is characterized by comprising the following steps:

s1, preparing the toughened glass of claim 1; a support piece is fixedly arranged on the toughened glass; the support piece divides the toughened glass into a plurality of impact-resistant protection areas;

s2, stacking: laminating the toughened glass, the first packaging adhesive film, the crystalline silicon cell set, the second packaging adhesive film and the back plate from top to bottom in sequence; each anti-impact protection area is correspondingly provided with a battery piece;

s3, laminating: forming a photovoltaic main body through a laminating process after lamination;

and S4, mounting the photovoltaic main body and the frame to form a large-size photovoltaic assembly.

11. The method for preparing a large-sized photovoltaic module according to claim 10, wherein: the supporting pieces are a plurality of supporting tables; the support table and the toughened glass are integrally formed; the preparation steps of the toughened glass are as follows:

A. the common glass treated by the edging and cleaning processes enters a heating section;

B. the common glass is subjected to high-temperature treatment to reach the softening point temperature of the glass and then is transmitted to the concave roller through the transmission roller, a plurality of concave pits are formed in the concave roller, and a plurality of support tables are preformed on the common glass under the combined action of the concave roller and the lower forming rollers symmetrically arranged with the concave roller;

C. and pre-forming the common glass with the plurality of supporting platforms to enter a toughening working section, and preparing the toughened glass with the plurality of supporting platforms.

12. The method for preparing a large-sized photovoltaic module according to claim 10, wherein: the supporting pieces are a plurality of supporting tables; the preparation steps of the toughened glass are as follows:

a. the common glass treated by the edging and cleaning processes enters a heating section;

b. the common glass is subjected to high-temperature treatment to reach the softening point temperature of the glass and then is transmitted to a boss roller through a transmission roller, a plurality of salient points are arranged on the boss roller, and a plurality of grooves are preformed on the common glass under the combined action of a boss roller way and a lower forming roller which is symmetrically arranged with the boss roller way;

c. pre-forming common glass with a plurality of grooves to enter a tempering working section, and preparing tempered glass with a plurality of grooves;

d. glue is coated on one end of the supporting platform and inserted into the groove, and the supporting platform is fixedly connected with the toughened glass in a bonding mode to form the toughened glass with a plurality of supporting platforms.

13. The method for preparing a large-sized photovoltaic module according to claim 10, wherein: the supporting piece is a reinforcing bracket; the reinforcing support comprises a plurality of transverse supporting bars and a plurality of longitudinal supporting bars; a plurality of anti-impact protection areas for correspondingly placing the battery pieces are arranged around the plurality of transverse supporting bars and the plurality of longitudinal supporting bars; the preparation steps of the toughened glass are as follows:

i, conveying a reinforcing support to a glass rolling working section through a roller, injecting molten glass onto the reinforcing support and rolling and forming the molten glass into a shape, thereby preparing a glass substrate embedded with the reinforcing support;

and II, heating and toughening the glass substrate to obtain the toughened glass which is completely soaked and contains the reinforcing bracket.

14. A method for manufacturing a large-sized photovoltaic module according to claim 10, 11 or 12, wherein: before the lamination in step S2, the first and second packaging films are also cut, and the cutting is performed according to the area through which the support passes, so as to form a cutting area through which the support can pass.

Technical Field

The invention relates to the field of photovoltaics, in particular to a large-size photovoltaic module and a preparation method thereof.

Background

In order to improve the output power of the photovoltaic module, the conversion efficiency of the crystalline silicon cell is limited, and the photovoltaic module on the market currently adopts the increase of the whole size of the photovoltaic module to improve the output power of the monolithic module. The higher output power of the monolithic photovoltaic module is generally realized by increasing the sizes of toughened glass for packaging, a packaging adhesive film and a back plate, and simultaneously matching a crystalline silicon cell group with a larger area, wherein the sizes of the crystalline silicon cell group are generally 182mm by 182mm and 210mm by 210 mm. However, the problem of reliability of mechanical load of the large-size photovoltaic module is brought, especially when the large-size photovoltaic module faces continuous high wind pressure or high snow pressure load in outdoor operation, the risk that the stress sealed by the toughened glass cannot sufficiently resist the continuous high load pressure exists, the toughened glass is broken, hidden cracks of the battery piece are caused, gases such as water vapor and oxygen in the air can also invade the photovoltaic module along the cracks of the toughened glass, and the risk that the power of a series of subsequent photovoltaic modules is attenuated or even fails is caused.

Disclosure of Invention

The invention provides a large-size photovoltaic module, which can relieve the damage of external loads to the large-size photovoltaic module, improve the anti-subfissure effect of a packaged crystalline silicon cell group, and reduce the power attenuation and possible failure risks of the large-size photovoltaic module.

The technical scheme for realizing the first purpose of the invention is as follows: the large-size photovoltaic module comprises a photovoltaic main body and a frame arranged around the edge of the photovoltaic main body; the photovoltaic main body sequentially comprises toughened glass, a first packaging adhesive film, a crystalline silicon cell set, a second packaging adhesive film and a back plate from top to bottom; the crystalline silicon cell piece group comprises a plurality of arranged cell pieces; the toughened glass is fixedly provided with a supporting piece; the support piece divides the toughened glass into a plurality of impact-resistant protection areas; and a battery piece is correspondingly arranged in each anti-impact protection area.

Furthermore, the support piece extends towards the back plate, sequentially penetrates through the first packaging adhesive film, the crystalline silicon cell set and the second packaging adhesive film, and then is contacted with the back plate to form a support; the supporting piece penetrates through the gaps between the cells of the crystalline silicon cell group.

Furthermore, the supporting pieces are a plurality of supporting tables; the support table and the toughened glass are integrally formed; one or more support platforms form a protection zone against impacts. If a support platform is used, the support platform may be in the form of a ring or rectangular frame, with the central region forming the impact-resistant protection zone.

As a variant design, the supporting elements are a plurality of supporting tables; a plurality of grooves which correspond to the supporting platforms one by one are formed in the plane of the toughened glass facing the crystalline silicon cell group; one end of the support platform is inserted into the groove and then fixedly connected with the toughened glass; one end of the support platform inserted into the groove is stuck to the bottom surface of the groove through glue; one or more support platforms form a protection zone against impacts.

As a variant design, the support is a reinforcing bracket; the reinforcing support comprises a plurality of transverse supporting bars and a plurality of longitudinal supporting bars; a plurality of impact-resistant protection areas are arranged around the plurality of transverse supporting bars and the plurality of longitudinal supporting bars, and each battery piece is correspondingly arranged in one impact-resistant protection area.

The reinforced bracket and the toughened glass are integrally formed.

The area, through which the supporting piece passes, of the first packaging adhesive film and the second packaging adhesive film is a cutting area.

Furthermore, the supporting piece is designed by adopting a supporting table, and the center of a cross-shaped gap formed between every two adjacent battery pieces is correspondingly provided with one supporting table; an anti-impact protection area is formed among the four support platforms which are distributed in a rectangular shape, and each anti-impact protection area is correspondingly provided with one battery piece.

The second purpose of the invention is to provide a preparation method for preparing the large-size photovoltaic module.

The technical scheme for realizing the second purpose of the invention is as follows: the preparation method of the large-size photovoltaic module comprises the following steps:

s1, preparing the toughened glass; a support piece is fixedly arranged on the toughened glass; the support piece divides the toughened glass into a plurality of impact-resistant protection areas;

s2, stacking: laminating the toughened glass, the first packaging adhesive film, the crystalline silicon cell set, the second packaging adhesive film and the back plate from top to bottom in sequence; each anti-impact protection area is correspondingly provided with a battery piece;

s3, laminating: forming a photovoltaic main body through a laminating process after lamination;

and S4, mounting the photovoltaic main body and the frame to form a large-size photovoltaic assembly.

Further, when the supporting pieces are a plurality of supporting tables, the supporting tables and the toughened glass are integrally formed; the preparation steps of the toughened glass are as follows:

A. the common glass treated by the edging and cleaning processes enters a heating section;

B. the common glass is subjected to high-temperature treatment to reach the softening point temperature of the glass and then is transmitted to the concave roller through the transmission roller, a plurality of concave pits are formed in the concave roller, and a plurality of support tables are preformed on the common glass under the combined action of the concave roller and the lower forming rollers symmetrically arranged with the concave roller;

C. and pre-forming the common glass with the plurality of supporting platforms to enter a toughening working section, and preparing the toughened glass with the plurality of supporting platforms.

As a variant, when the support is a plurality of support tables; the preparation steps of the toughened glass are as follows:

a. the common glass treated by the edging and cleaning processes enters a heating section;

b. the common glass is subjected to high-temperature treatment to reach the softening point temperature of the glass and then is transmitted to a boss roller through a transmission roller, a plurality of salient points are arranged on the boss roller, and a plurality of grooves are preformed on the common glass under the combined action of a boss roller way and a lower forming roller which is symmetrically arranged with the boss roller way;

c. pre-forming common glass with a plurality of grooves to enter a tempering working section, and preparing tempered glass with a plurality of grooves;

d. coating glue on one end of the supporting platform, inserting the supporting platform into the groove, fixedly connecting the supporting platform with the toughened glass in a bonding mode, and forming the toughened glass with a plurality of supporting platforms;

as a variant, when the support is a reinforcing bracket; the reinforcing support comprises a plurality of transverse supporting bars and a plurality of longitudinal supporting bars; a plurality of anti-impact protection areas for correspondingly placing the battery pieces are arranged around the plurality of transverse supporting bars and the plurality of longitudinal supporting bars; the preparation steps of the toughened glass are as follows:

i, conveying a reinforcing support to a glass rolling working section through a roller, injecting molten glass onto the reinforcing support and rolling and forming the molten glass into a shape, thereby preparing a glass substrate embedded with the reinforcing support;

and II, heating and toughening the glass substrate to obtain the toughened glass which is completely soaked and contains the reinforcing bracket.

Further, before the lamination in step S2, the first and second packaging films are also cut, and the cutting is performed according to the area through which the support passes, so as to form a cutting area through which the support can pass. The cutting is performed to prevent the support member from wrinkling when passing through the first and second packaging films.

The invention has the positive effects that: according to the invention, through the design of the supporting piece, the mechanical load capacity of the toughened glass can be greatly improved, so that an impact-resistant protection area can be established in the actual use process, the damage of external load to a large-size photovoltaic module is relieved, the anti-subfissure effect of the packaged crystalline silicon cell group is improved, and the power attenuation and possible failure risk of the large-size photovoltaic module are reduced.

Drawings

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which

FIG. 1 is a schematic view of a laminate of a photovoltaic body according to the present invention;

FIG. 2 is a schematic front view of a large-sized photovoltaic module according to embodiment 1 of the present invention;

fig. 3 is a cross-sectional view at a support stage in an embodiment 1 of a large-sized photovoltaic module according to the present invention;

FIG. 4 is a schematic view of an impact-resistant protection zone established by a support table in example 1 of the present invention;

FIG. 5 is a deformation diagram of the impact resistant protection zone of FIG. 4 under an external load;

FIG. 6 is a schematic view showing a process for producing a tempered glass in example 1 of the present invention;

FIG. 7 is a schematic view showing a process for preforming a plurality of supporting tables of a plain glass according to example 1 of the present invention;

fig. 8 is a cross-sectional view at the support stage in example 2 of a large-sized photovoltaic module according to the present invention;

FIG. 9 is a schematic view showing a process for producing a tempered glass in example 2 of the present invention;

FIG. 10 is a schematic view showing a process of preforming a plurality of grooves of a general glass according to example 2 of the present invention;

FIG. 11 is a schematic structural view of a reinforcing brace in example 3 of the present invention;

FIG. 12 is a schematic view of a process for producing a tempered glass in example 3 of the present invention.

Detailed Description

(example 1)

Referring to fig. 1 to 4, the large-sized photovoltaic module of the present invention includes a photovoltaic main body and a frame 1 surrounding the edge of the photovoltaic main body; the photovoltaic main body sequentially comprises toughened glass 2, a first packaging adhesive film 3, a crystalline silicon battery piece group 4, a second packaging adhesive film 5 and a back plate 6 from top to bottom; the crystalline silicon cell group 4 comprises a plurality of cells arranged in an array; the toughened glass 2 is fixedly provided with a supporting piece; the supporting pieces are a plurality of supporting platforms 7 integrally formed with the toughened glass; the supporting platform 7 extends towards the back plate 6, sequentially passes through the first packaging adhesive film 3, the crystalline silicon battery piece group 4 and the second packaging adhesive film 5, and then contacts with the back plate 6 to form a support; the supporting platform 7 penetrates through the gaps between the cells of the crystalline silicon cell group 4.

A support platform 7 is correspondingly arranged at the center of a cross-shaped gap formed between every two adjacent battery pieces; an anti-impact protection area 8 is formed among the four support platforms 7 which are distributed in a rectangular shape, and each anti-impact protection area 8 is correspondingly provided with a battery piece.

The area of the first packaging adhesive film 3 and the second packaging adhesive film 5 for the supporting table 7 to pass through is a cutting area, and the cutting area can be used for the supporting table 7 to pass through but cannot cause wrinkle influence on the first packaging adhesive film 3 and the second packaging adhesive film 5.

See fig. 5, when the impact-resistant protection area 8 established by the four support tables 7 is subjected to external load, the tempered glass 2 is deformed, and the deformation process is divided into two stages:

the first stage is as follows: the load directly acts on the light-facing surface 21 of the toughened glass 2 to deform the light-facing surface 21;

and a second stage: when bearing external load, the light facing surface 21 is stressed and quickly transmitted to the packaging surface 22 of the toughened glass 2 through the matrix of the toughened glass 2, so that the packaging surface 22 is also deformed.

Wherein, the light facing surface 21 of the toughened glass 2 generates a deformation light facing surface when being loaded, and an upper deformation H1 is formed between the light facing surface 21 and the deformation light facing surface; the deformation sealing surface of the sealing surface 22 of the toughened glass 2 when the load is applied forms a lower deformation H2 between the sealing surface 22 and the deformation sealing surface.

When the traditional large-size photovoltaic module is subjected to external acting force, the mechanical reliability of the large-size photovoltaic module is improved completely through the sealing stress of the toughened glass 2 and the mechanical strength of the frame 1. In the technical scheme of the invention, when an external load acts on the light facing surface 21 of the formed toughened glass 2, the four support tables 7 establish the anti-impact protection region 8 for resisting the acting force of the external load, so that the damage of the external load to the large-size photovoltaic module is relieved, the anti-subfissure effect of the packaged crystalline silicon cell group 4 is improved, and the power attenuation and possible failure risk of the large-size photovoltaic module are reduced.

The toughened glass 2 can bear small deformation, and when external load impacts a large-size photovoltaic module with continuous high load, the toughened glass 2 still cannot crack under the condition of generating small deformation. However, the cell is fragile, and the slight deformation of the tempered glass can cause the subfissure of the cell, and the subfissure causes the increase of the series resistance of the cell, thereby generating a series of power attenuation and even increasing the failure risk of the photovoltaic module.

Referring to fig. 6 and 7, the method for preparing the large-size photovoltaic module according to the present invention comprises the following steps:

s1, preparing tempered glass 2: A. the common glass processed by the edging and cleaning processes enters a heating section 9; B. ordinary glass is subjected to high-temperature treatment to reach the softening point temperature of the glass, and then is transmitted to a concave roller 11 through a transmission roller 10, a plurality of concave pits 11-1 are formed in the concave roller 11, and a plurality of support tables 7 are preformed on the ordinary glass under the combined action of the concave roller 11 and lower forming rollers 12 which are symmetrically arranged with the concave roller 11; C. pre-forming common glass of a plurality of supporting tables 7 to enter a toughening working section 13, realizing transmission through an upper roller 13-1 and a lower roller 13-2, realizing cold quenching on the high-temperature common glass through cooling air blown by an upper air grid 13-3 and a lower air grid 13-4, and forming compressive stress on the surface layer and tensile stress inside the cooled toughened glass so as to prepare the toughened glass 2 with a plurality of supporting tables 7;

s2, stacking: before lamination, cutting the first packaging adhesive film 3 and the second packaging adhesive film 5 according to the distribution of the supporting table 7, and cutting according to the area through which the supporting table 7 passes to form a cutting area through which the supporting table 7 can pass; then laminating the toughened glass 2, the first packaging adhesive film 3, the crystalline silicon battery piece group 4, the second packaging adhesive film 5 and the back plate 6 in sequence from top to bottom;

s3, laminating: forming a photovoltaic main body through a laminating process after lamination;

and S4, mounting the photovoltaic main body and the frame 1 to form a large-size photovoltaic assembly.

(example 2)

Referring to fig. 8, the supporting members in the present invention are a plurality of supporting bases 7; a plurality of grooves 2-1 which correspond to the support platforms 7 one by one are arranged on the plane of the toughened glass 2 facing the crystalline silicon cell group 4; one end of the support platform 7 is inserted into the groove 2-1 and then fixedly connected with the toughened glass 2. One end of the support table 7 inserted into the groove 2-1 is adhered to the bottom surface of the groove 2-1 through glue. Other technical features are the same as those of the large-sized photovoltaic module in example 1.

Referring to fig. 9 and 10, in the method for manufacturing the large-size photovoltaic module according to the present invention, the tempered glass 2 is manufactured as follows:

a. the common glass treated by the edging and cleaning processes enters a heating section;

b. the common glass is treated at high temperature to reach the softening point temperature of the glass and then is transmitted to a boss roller 14 through a transmission roller 10, a plurality of salient points 14-1 are arranged on the boss roller 14, and a plurality of grooves 2-1 are preformed on the common glass under the combined action of the boss roller 14 and a lower forming roller 12 which is symmetrically arranged with the boss roller;

c. pre-forming common glass with a plurality of grooves 2-1 to enter a toughening working section, and preparing toughened glass 2 with a plurality of grooves 2-1;

d. coating glue on one end of the support platform 7, inserting the support platform into the groove 2-1, fixedly connecting the support platform with the toughened glass 2 in a bonding mode, and forming the toughened glass 2 with a plurality of support platforms 7;

the other steps are the same as the preparation method of the large-sized photovoltaic module in example 1.

(example 3)

Referring to fig. 11, the large-sized photovoltaic module of the present invention includes a photovoltaic main body and a frame 1 surrounding the edge of the photovoltaic main body; the photovoltaic main body sequentially comprises toughened glass 2, a first packaging adhesive film 3, a crystalline silicon battery piece group 4, a second packaging adhesive film 5 and a back plate 6 from top to bottom; the crystalline silicon cell group 4 comprises a plurality of cells arranged in an array; the toughened glass 2 is fixedly provided with a supporting piece; the supporting piece is a reinforcing bracket 15; the reinforcing bracket 15 comprises a plurality of transverse supporting bars and a plurality of longitudinal supporting bars; a plurality of impact-resistant protection areas 8 are arranged around the plurality of transverse supporting bars and the plurality of longitudinal supporting bars, and each battery piece is correspondingly placed in one impact-resistant protection area 8.

The reinforcing support 15 and the toughened glass 2 are integrally formed, and the reinforcing support 15 is completely wrapped by the toughened glass 2.

After reinforcing support 15 through filling in toughened glass 2's the substrate, when external mechanical load acted on toughened glass 2 through filling reinforcing support 15, many horizontal support bars and many longitudinal support bars found a plurality of and battery piece and place the corresponding protection zone 8 that shocks resistance of position on toughened glass 2, absorbed external load effort through reinforcing support 15, avoided toughened glass 2's latent crack.

Referring to fig. 12, in the preparation method of the large-size photovoltaic module of the present invention, the preparation steps of the tempered glass 2 are as follows:

i, conveying a reinforcing support 15 to a glass rolling working section through a roller 16, injecting molten glass 17 onto the reinforcing support 15, and forming through a roller group 18 to obtain a glass substrate embedded with the reinforcing support 15;

and II, heating and toughening the glass substrate to obtain the toughened glass 2 which is completely soaked and contains the reinforcing bracket.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.