CN212257419U

CN212257419U - Photovoltaic double-glass half-sheet assembly

Info

Publication number: CN212257419U
Application number: CN202020907012.3U
Authority: CN
Inventors: 霍祯潮; 王耀洪; 韦博
Original assignee: Shenzhen Yingli New Energy Resources Co Ltd
Current assignee: Shenzhen Yingli New Energy Resources Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-12-29
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a photovoltaic double-glass half-sheet assembly, relating to the photovoltaic technical field, comprising a laminated structure, wherein the laminated structure comprises upper glass, a first adhesive layer, a cell matrix, a second adhesive layer, a supporting layer and lower glass from bottom to top; the side face of the laminated structure is wound with a sealing adhesive tape, and the lower end of the laminated structure is connected with a junction box. The supporting layer includes PET frame layer and third glue film, and non-deformable in lamination process lays one deck PET frame layer at the battery piece array periphery and can effectively solve because of the battery piece fragmentation that glass dead weight problem leads to, reduces the finished product defective rate. The battery piece matrix comprises at least two battery packs connected in parallel; the parallel connection and the relative series connection can reduce the resistance of the cell matrix and reduce the power loss. The battery pack comprises a plurality of crystalline silicon battery piece halves arranged at intervals, the current of the battery piece halves is reduced by half compared with the power of the conventional whole battery piece, and the current is reduced by half, so that the heating of the assembly is reduced, and the power generation quality is improved.

Description

Photovoltaic double-glass half-sheet assembly

Technical Field

The utility model belongs to the technical field of the photovoltaic technique and specifically relates to a photovoltaic double-glass half-sheet subassembly is related to.

Background

Along with the enhancement of people's consciousness to environmental protection, solar photovoltaic power generation has gradually obtained popularization and application, and solar photovoltaic power generation has many advantages in the electricity generation process than other power generation systems, for example: the solar cell is safe, reliable, free of complex mechanical components, free of noise and pollution, free of regional limitation, free of energy, free of power transmission line erection, large or small in scale, capable of being conveniently combined with a building and the like, but the solar cell has physical and chemical defects of being thin, fragile, easy to oxidize and break and the like.

The conventional double-glass assembly is laid in the sequence of upper-layer glass, glue film, cell matrix, glue film and lower-layer glass, and the cell is easy to break after lamination due to the downward self-pressure effect of the upper-layer glass; meanwhile, an EVA film (Polyethylene vinyl acetate, Polyethylene-polyvinyl acetate copolymer, abbreviated as EVA) is a hot melt film, and has high fluidity, and phenomena such as glue shortage, bubbles, displacement and the like are easily generated after lamination.

The conventional photovoltaic power generation system is commonly provided with a single glass and double glasses, and a photovoltaic double-glass assembly is more and more favored by power station customers due to higher reliability and PID (Potential induced Degradation) resistance. However, the photovoltaic dual-glass assembly in the market adopts a whole battery piece, and the power loss is relatively high. Therefore, the problems of glue overflow, glass breakage rate, high power consumption of the battery piece and the like of the photovoltaic dual-glass assembly need to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the foretell problem to current photovoltaic dual glass assembly, providing a photovoltaic dual glass assembly of control glass fragmentation rate, control dual glass assembly excessive glue volume and reduced the battery piece consumption.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

a photovoltaic double-glass half-piece assembly comprises a laminated structure, wherein the laminated structure is sequentially laminated from top to bottom into upper-layer glass, a first glue layer, a cell piece matrix, a second glue layer, a supporting layer and lower-layer glass; the side face of the laminated structure is wound with a sealing adhesive tape, and the lower end of the laminated structure is connected with a junction box.

Preferably, the support layer includes a PET frame layer (Polyethylene terephthalate, PET for short) and a third adhesive layer, and the PET frame layer is located between the second adhesive layer and the third adhesive layer; the laminated solar cell array is not easy to deform in the laminating process, has excellent viscosity with the second adhesive layer and the third adhesive layer after being laminated at high temperature, and can effectively solve the problem that the cell is cracked due to the self weight of glass in the laminating process by paving a PET frame layer on the periphery of the cell array.

Preferably, the battery piece matrix comprises at least two battery packs connected in parallel; the parallel connection and the relative series connection can reduce the resistance of the cell matrix, reduce the power loss and further achieve the purpose of high output.

Preferably, the battery pack comprises a plurality of crystalline silicon battery piece halves arranged at intervals, the battery piece halves in the same battery pack are connected in series, the battery piece halves are cut into two parts for a whole battery piece and are connected in series, the half current of the battery piece is reduced by half compared with the power of the whole battery piece in a conventional mode, the current is reduced by half, and therefore the heating of the assembly is reduced, and the power generation quality is improved.

Preferably, the cell half-piece is rectangular, and the specification of the cell half-piece is 156mm 78mm or 156.75mm 78.375mm or 157mm 78.5mm or 158.75mm 79.375mm or 166mm 83 mm.

Preferably, the battery packs are welded in parallel through photovoltaic welding strips, and the half battery pieces are welded in series through the photovoltaic welding strips.

Preferably, the photovoltaic solder strip is a tin-coated solder strip.

Preferably, the edge sealing adhesive tape is a high-temperature adhesive tape, and a plurality of openings are formed in the high-temperature adhesive tape; the excessive volume of gluing after can effective control EVA glued membrane hot melt for difficult outflow subassembly outside after the EVA glued membrane hot melt, further controlled the inside EVA glued membrane of subassembly because of overflowing the bubble that too much produced or lack the condition of melten gel.

Preferably, the upper layer of glass is coated toughened cloth-figured glass, and the lower layer of glass is toughened cloth-figured glass; the light transmittance is enhanced, so that the light irradiates the ground through the gaps among the cell matrix, and the solar cell can be used in places where the ground needs to be irradiated by the light. Glass is used as the assembly back plate, and the assembly back plate has better water resistance, aging resistance, impact resistance and insulating property than the back plate made of the conventional plastic material.

Preferably, the first adhesive layer and the second adhesive layer are both EVA (Polyethylene vinyl acetate, abbreviated as EVA). The EVA adhesive film has the advantages of excellent insulativity, sealing property, aging resistance, elasticity and hot melt curing property, plays a role in protecting the middle battery piece and plays a role in cross-linking and sealing adjacent materials.

Preferably, the first glue layer is located on the positive electrode surface of the battery piece matrix, and the second glue layer is located on the negative electrode surface of the battery piece matrix.

Preferably, the thickness of the second adhesive layer and the thickness of the third adhesive layer are half of the thickness of the first adhesive layer.

Preferably, the thickness of the first adhesive layer is 0.6mm, and the thickness of the second adhesive layer and the thickness of the third adhesive layer are 0.3 mm.

Preferably, the dual-slide half-slide assembly further comprises a frame disposed on the side of the laminated structure.

Preferably, the frame is made of aluminum alloy.

Preferably, the junction box is split; the purposes of reducing the length of the cable, saving the cost and reducing the line loss are achieved.

Compared with the prior art, the beneficial effects of the utility model reside in that: a photovoltaic double-glass half-piece assembly comprises a laminated structure, wherein the laminated structure sequentially comprises upper glass, a first adhesive layer, a cell piece matrix, a second adhesive layer, a supporting layer and lower glass from top to bottom; the side face of the laminated structure is wound with a sealing adhesive tape, and the lower end of the laminated structure is connected with a junction box. The support layer comprises a PET frame layer and a third adhesive layer, and the PET frame layer is positioned between the second adhesive layer and the third adhesive layer; the laminated solar cell has the advantages that the laminated solar cell is not easy to deform in the laminating process, the laminated solar cell has excellent viscosity with the second adhesive layer and the third adhesive layer after high-temperature lamination, one layer of PET is laid on the periphery of the cell array, the problem of dead weight of glass or fragmentation of the cell caused by pressure in the laminating process can be effectively solved in the laminating process, the reject ratio of finished products is reduced, and the overall production efficiency is improved. The battery piece matrix comprises at least two battery packs connected in parallel; the parallel connection and the relative series connection can reduce the resistance of the cell matrix, reduce the power loss and further achieve the purpose of high output. The battery pack comprises a plurality of crystalline silicon battery piece halves arranged at intervals, the battery piece halves in the same battery pack are connected in series, the battery piece halves are cut into two parts for a whole battery piece and are connected in series, half current of the battery piece halves is reduced by half compared with the power of the whole battery piece which is conventional, the current is reduced by half, and therefore the heating of the assembly is reduced, and the power generation quality is improved.

Drawings

Fig. 1 is a schematic structural view of a stacked structure of a photovoltaic dual-glass half-sheet assembly in an embodiment of the invention;

fig. 2 is a schematic structural view of a wrapping edge sealing tape of a laminated structure of a photovoltaic double-glass half-sheet assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a cell matrix of a photovoltaic dual-glass half-cell assembly according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a photovoltaic dual-glass half-sheet assembly according to an embodiment of the present invention, wherein the photovoltaic dual-glass half-sheet assembly is cut into a half-sheet;

fig. 5 is a schematic diagram of a structure of a circuit of a cell matrix of a photovoltaic dual-glass half-cell assembly according to an embodiment of the present invention;

fig. 6 is an elevation view of a photovoltaic module product of a photovoltaic dual-glass half-sheet assembly in an embodiment of the invention;

in the figure: 1 is upper glass, 2 is first glue film, 3 is the battery piece matrix, 4 is the second glue film, 41 is the third glue film, 5 is the PET frame layer, 6 is lower floor's glass, 7 is the banding sticky tape, 8 is half of battery piece, 9 is the frame.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

In the description of the present application, it is to be understood that the terms "intermediate," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In addition, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that there may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

referring to fig. 1-6, a photovoltaic dual-glass half-chip assembly comprises a laminated structure, which is sequentially from top to bottom, 1, a first adhesive layer 2, a cell matrix 3, a second adhesive layer 4, a supporting layer, and a lower glass layer 6; the side surface of the laminated structure is wound with a sealing adhesive tape 7, and the lower end of the laminated structure is connected with a junction box.

Specifically, the support layer includes a PET frame layer 5(Polyethylene terephthalate, PET for short) and a third adhesive layer 41, and the PET frame layer 5 is located between the second adhesive layer 4 and the third adhesive layer 41; PET frame layer 5 is non-deformable in lamination process, and has excellent viscidity with second glue film 4 and third glue film 41 after the high temperature lamination, can effectively solve tempering cloth line glass at range upon range of in-process through at the peripheral one deck PET frame of bedding of battery piece array, and the battery piece that leads to because of dead weight problem or range upon range of in-process pressure is cracked, through setting up the supporting layer, effectual control has lived the battery piece fragment rate. In a specific embodiment, the PET frame layer 5 has a single side with a width of 5mm and a thickness of 0.2 mm.

Specifically, the first adhesive layer 2, the second adhesive layer 4, and the third adhesive layer 41 are all EVA (Polyethylene vinyl acetate, abbreviated as EVA). The EVA adhesive film has the advantages of excellent insulativity, sealing property, aging resistance, elasticity and hot melt curing property, plays a role in protecting the middle battery piece and plays a role in cross-linking and sealing adjacent materials. Further, the thickness of the second glue layer 4 and the thickness of the third glue layer 41 are half of the thickness of the first glue layer 2. In a specific embodiment, the thickness of the first adhesive layer 2 is 0.6mm, and the thickness of the second adhesive layer 4 and the thickness of the third adhesive layer 41 are 0.3 mm.

In order to enhance the light transmittance, absorb more light and have better weather resistance and impact resistance, the negative electrode surface of the component, namely the surface facing the sunlight, is covered with coated toughened cloth-patterned glass, namely the upper layer glass 1 is coated toughened cloth-patterned glass, and the lower layer glass 6 is toughened cloth-patterned glass, so that the light irradiates the ground through the gaps among the 3 intervals of the cell matrix, and the solar cell module can be used in places where the ground needs light irradiation. The coated toughened cloth-textured glass is used as the assembly back plate, and has better water resistance, aging resistance, impact resistance and insulating property than the back plate made of the conventional plastic material. In a specific embodiment, the upper glass layer 1 has a thickness of 2.5 mm.

Specifically, the battery piece matrix 3 comprises at least two battery packs connected in parallel; in a specific embodiment, the battery piece matrix 3 comprises two battery packs connected in parallel, the parallel connection is relatively connected in series, the resistance of the battery piece matrix 3 can be reduced, the power loss is reduced, and the purpose of high output is further achieved; simultaneously the group battery includes the crystalline silicon battery piece half 8 that a plurality of interval arrangements set up, in this embodiment, a group battery includes the crystalline silicon battery piece half 8 that 60 interval arrangements set up, battery piece half 8 in same group battery is established ties, battery piece half 8 is that whole battery piece cuts into two, and establish ties, battery piece half 8 electric current reduces half relative conventional whole battery piece power, the electric current reduces half thereupon, thereby reduce the subassembly and generate heat, promote the power generation quality, connect in series the welding through scribbling tin solder strip between the battery piece half 8, reduce the current loss.

After the positive piece of the battery piece is integrally cut into the two battery piece half pieces 8, the battery current is reduced, the welding strip cost for welding the battery piece can be reduced, the loss of the current passing through the welding strip is reduced, and the power output is increased. The half pieces 8 of the 60 battery pieces in the battery pack are connected in series, and then the two groups of battery packs are arranged in parallel, so that the internal resistance of the battery piece matrix 3 is relatively reduced, and the power output is obviously realized.

In one embodiment, the whole cell is square, and the specific cell size is 158.75mm by 158.75mm, so that the cell half 8 is rectangular, and the specific size is 158.75mm by 79.375 mm; in another specific embodiment, the size of the whole cell sheet can be 156mm or 156.75mm or 157mm or 158.75mm or 166 mm.

Specifically, the edge sealing adhesive tape 7 is a high-temperature adhesive tape, and a plurality of openings are formed in the high-temperature adhesive tape; in this embodiment, evenly beat 5 apertures on the high temperature sticky tape of minor face, evenly beat 9 apertures on the high temperature sticky tape of long limit, guarantee the air in the laminated structure that can discharge in the evacuation process, the excessive volume of gluing after the effective control EVA glued membrane hot melt for difficult outflow laminated structure outside behind the EVA glued membrane hot melt, avoid simultaneously overflowing too much EVA glued membrane and the laminated structure edge that leads to the condition of scarce glue or bubble at lamination and the process of managing to find time.

The terminal box is split type, disposes anodal interface and negative pole interface, reaches the purpose that reduces cable length, saves the cost to and reduce the line loss. Specifically, the first glue layer 2 is located on the positive electrode surface of the cell matrix 3, and the second glue layer 4 is located on the negative electrode surface of the cell matrix 3.

This double-glass half piece subassembly is still including locating frame 9 of stacked structure side, and frame 9 is C type aluminum alloy material for protect stacked structure.

A photovoltaic double-glass half-sheet assembly comprises a laminated structure, wherein the laminated structure sequentially comprises an upper layer glass 1, a first glue layer 2, a cell matrix 3, a second glue layer 4, a supporting layer and a lower layer glass 6 from top to bottom; the side surface of the laminated structure is wound with a sealing adhesive tape 7, and the lower end of the laminated structure is connected with a junction box. The support layer comprises a PET frame layer 5 and a third adhesive layer 41, and the PET frame layer 5 is positioned between the second adhesive layer 4 and the third adhesive layer 41; the laminated solar cell has the advantages that the laminated solar cell is not easy to deform in the laminating process, the laminated solar cell has excellent viscosity with the second adhesive layer 4 and the third adhesive layer 41 after high-temperature lamination, and the PET frame layer 5 is paved on the periphery of the cell matrix 3, so that the problem of dead weight of glass or fragmentation of cells caused by pressure in the laminating process can be effectively solved, the reject ratio of finished products is reduced, and the overall production efficiency is improved. The cell matrix 3 comprises at least two parallel battery packs; the parallel connection and the relative series connection can reduce the resistance of the cell matrix 3, reduce the power loss and further achieve the purpose of high output. The group battery includes the half piece 8 of crystalline silicon battery piece that a plurality of interval arrangements set up, and the half piece 8 of battery piece in same group battery establishes ties, and half piece 8 of battery piece cuts into two for whole battery piece to establish ties, and half piece 8 electric current of battery piece reduces half for whole battery piece power of conventionality, and the electric current reduces half thereupon, thereby reduces the subassembly and generates heat, promotes the generating quality.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The photovoltaic double-glass half-sheet assembly is characterized by comprising a laminated structure, wherein the laminated structure is sequentially laminated from top to bottom into upper-layer glass, a first adhesive layer, a cell sheet matrix, a second adhesive layer, a supporting layer and lower-layer glass; the side face of the laminated structure is wound with a sealing adhesive tape, and the lower end of the laminated structure is connected with a junction box.

2. The photovoltaic dual-slide half-slide assembly of claim 1, wherein the support layer comprises a PET frame layer and a third glue layer, the PET frame layer being located between the second glue layer and the third glue layer.

3. The photovoltaic dual-slide half-slide assembly of claim 2 wherein the matrix of cells comprises at least two parallel connected sets of cells.

4. The photovoltaic dual-slide assembly according to claim 3, wherein the cell stack comprises a plurality of spaced-apart crystalline silicon cell halves, the cell halves of the same cell stack being connected in series.

5. The photovoltaic dual-slide half-slide assembly according to claim 4 wherein the battery packs are soldered in parallel by photovoltaic solder strips and the cell halves are soldered in series by photovoltaic solder strips.

6. The photovoltaic dual-slide half-slide assembly according to claim 1, wherein the edge sealing tape is a high temperature tape having a plurality of openings therein.

7. The photovoltaic dual-glass half-slide assembly according to claim 6, wherein the upper layer of glass is coated tempered cloth-textured glass and the lower layer of glass is tempered cloth-textured glass.

8. The photovoltaic dual-glass half-slide assembly according to claim 7, wherein the first adhesive layer, the second adhesive layer, and the third adhesive layer are all EVA adhesive films.

9. The photovoltaic dual-slide half-slide assembly of claim 8, wherein the thickness of the second glue layer and the third glue layer is half the thickness of the first glue layer.

10. The photovoltaic dual-slide half-slide assembly according to claim 1 further comprising a bezel disposed on a side of the laminated structure.