CN211743168U

CN211743168U - Flexible series-parallel laminated photovoltaic module

Info

Publication number: CN211743168U
Application number: CN202020853821.0U
Authority: CN
Inventors: 李晓磊; 彭文博; 高虎
Original assignee: Huaneng Clean Energy Research Institute; China Huaneng Group Co Ltd
Current assignee: Huaneng Clean Energy Research Institute; China Huaneng Group Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-10-23
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a flexible series-parallel connection shingled photovoltaic module belongs to photovoltaic power generation technical field. The laminated tile battery pack is packaged between the front plate and the back plate, the front adhesive film is arranged between the front plate and the laminated tile battery pack, the back adhesive film is arranged between the laminated tile battery pack and the back plate, the front surface and the back surface of each battery piece in the laminated tile battery pack are respectively provided with an electrode, and the front plate and the back plate are flexible plates. The front plate and the rear plate are made of flexible materials, the conductive adhesive is silicon-based conductive silver adhesive, the conductive adhesive has excellent elasticity after being cured after being packaged, the local stress of the series-parallel connection battery pieces is reduced, the problem of hidden cracking of the battery pieces can be well solved, and the solar cell module has the advantages of strong foundation settlement resistance and good building associativity, can exert the high-power advantage of the series-parallel connection laminated photovoltaic module in various occasions, and enlarges the application range of the series-parallel connection laminated photovoltaic module.

Description

Flexible series-parallel laminated photovoltaic module

Technical Field

The utility model belongs to the technical field of photovoltaic power generation, concretely relates to flexible series-parallel connection shingled photovoltaic module.

Background

The series-parallel connection laminated photovoltaic module realizes the parallel connection of the battery slices in a staggered connection mode while connecting the battery slices in series, completely omits a welding strip, and has the advantages of high power and strong local shielding resistance. However, due to the fact that a large number of continuous staggered and overlapped cell slices are arranged in the series-parallel laminated photovoltaic module, large stress is caused to the cell slices in local positions, and when the series-parallel laminated photovoltaic module is combined with a flexible technology, the problem of hidden cracking is easily caused compared with a traditional module. In addition, the conventional series-parallel connection laminated tile photovoltaic module uses toughened glass as the conventional photovoltaic module, so that the defects of poor foundation settlement resistance and poor building binding performance are caused, the application range of the laminated tile photovoltaic module is limited, and the advantage of high power of the laminated tile photovoltaic module cannot be exerted on more occasions.

Disclosure of Invention

In order to solve the problem, the utility model aims to provide a flexible tandem and parallel shingled photovoltaic module has overcome the sliced latent problem of splitting of battery well to have anti ground settlement ability reinforce, with the good advantage of building associativity, enlarged the application range of tandem and parallel shingled subassembly.

The utility model discloses a realize through following technical scheme:

the utility model discloses a flexible cluster parallel stack tile photovoltaic module, including front bezel, preceding glued membrane, stack tile battery piece group, back glued membrane and backplate, stack tile battery piece group encapsulation is between front bezel and backplate, and preceding glued membrane is established between front bezel and stack tile battery piece group, and the back glued membrane is established between stack tile battery piece group and backplate, and the front and the back of every battery piece in the stack tile battery piece group are equipped with the electrode respectively, adopt conductive adhesive to connect between the adjacent battery piece, and conductive adhesive is silica-based conductive silver glue, and front bezel and backplate are the flexbile plate.

Preferably, the battery piece is a battery piece formed by cutting a single battery piece.

Further preferably, the cut ratio of the battery piece is 1/2, 1/3, 1/4, 1/5 or 1/6.

Preferably, the battery piece is a single-sided battery piece or a double-sided battery piece.

Further preferably, when the battery piece is a single-sided battery piece, the back sheet is a TPT sheet, a KPK sheet, an FFC sheet, a TFB sheet, or a KFB sheet.

Further preferably, when the battery piece is a double-sided battery piece, the back plate is an FFC plate or a TFB plate.

Preferably, the front adhesive film and the rear adhesive film are POE adhesive films or EVA adhesive films.

Preferably, the front plate is an FFC plate or a TFB plate.

Preferably, the electrode is a silver electrode.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a flexible series-parallel connection imbricate photovoltaic module, adopt the flexbile plate as front bezel and back plate, adopt silica-based conductive silver adhesive to connect between the battery piece, to series-parallel connection imbricate, because the battery piece stromatolite is compacter, it is more fragile if after the conductive adhesive solidification, cause the cracked or latent splitting of battery piece easily in the panel bending, and can make the panel keep crooked state for a long time and do not have latent splitting with the better silica-based conductive silver adhesive of solidification elasticity, good elasticity has after the encapsulation, the local stress of series-parallel connection battery piece has been reduced, can overcome the sliced latent problem of splitting of battery well, and have anti ground settlement ability reinforce, with the good advantage of building associativity, make its high power advantage that can all exert series-parallel connection imbricate photovoltaic module in various occasions, the application range of series-parallel connection imbricate module has been enlarged.

Further, when the battery piece is a single-sided battery piece, the back plate is a TPT plate, a KPK plate, a FFC plate, a TFB plate or a KFB plate, and the material has the advantages of high insulation, good water resistance and aging resistance.

Further, when the battery piece is a double-sided battery piece, the back plate is an FFC plate or a TFB plate, and has high insulation, good water resistance and aging resistance, good stretchability and light transmittance, and the light transmittance is greater than 90%.

Furthermore, preceding glued membrane is POE glued membrane or EVA glued membrane with the back glued membrane, and the POE glued membrane has the advantage that anti hydrolytic capability is strong, and the EVA glued membrane has that light transmittance is good, advantage with low costs.

Further, the front plate is an FFC plate or a TFB plate, has good stretchability and light transmittance, and has light transmittance of more than 90%.

Furthermore, the electrode is a silver electrode, and has the advantages of low resistance and good conductivity.

Drawings

Fig. 1 is a schematic view of the overall structure of the flexible series-parallel laminated tile photovoltaic module of the present invention;

fig. 2 is a schematic structural diagram of a cell of the flexible series-parallel laminated photovoltaic module according to the present invention;

fig. 3 is a schematic structural view of a laminated tile cell set of the flexible series-parallel laminated tile photovoltaic module according to the present invention;

fig. 4 is a production flow chart of the flexible series-parallel laminated tile photovoltaic module of the present invention;

fig. 5 is an IV performance diagram of the flexible series-parallel shingled photovoltaic module of the present invention;

fig. 6 is an IV performance graph of a conventional photovoltaic module.

In the figure: the solar cell module comprises a front plate 1, a front adhesive film 2, a laminated tile cell group 3, a cell 31, electrodes 311, a conductive adhesive 32, an I-shaped welding strip 33, a bus bar 34, a rear adhesive film 4, a back plate 5 and a junction box 6.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and embodiments:

as fig. 1, the utility model discloses a flexible tandem-parallel laminated tile photovoltaic module, including front bezel 1, preceding glued membrane 2, laminated tile battery piece group 3, back glued membrane 4 and backplate 5, laminated tile battery piece group 3 encapsulation is between front bezel 1 and backplate 5, and preceding glued membrane 2 is established between front bezel 1 and laminated tile battery piece group 3, and back glued membrane 4 is established between laminated tile battery piece group 3 and backplate 5.

As shown in fig. 2, the battery sheet 31 is formed by cutting a common single battery sheet according to a certain ratio, and the cutting ratio may be 1/2, 1/3, 1/4, 1/5 or 1/6. The battery piece 31 is a single-sided battery piece or a double-sided battery piece. The front and back surfaces of each cell 31 are respectively provided with electrodes 311, and the electrodes 311 are preferably silver electrodes.

The front plate 1 and the back plate 5 are flexible plates, and the material of the front plate 1 is FFC (coating type material containing special fluorine-containing high polymer) or TFB (coating/composite type material composed of polyvinyl fluoride and special fluorine-containing high polymer). When the battery piece 31 is a single-sided battery piece, the material of the back plate 5 is TPT (composite material composed of polyvinyl fluoride/mylar/polyvinyl fluoride), KPK (composite material composed of polyvinylidene fluoride/mylar/polyvinylidene fluoride), FFC, TFB or KFB (coating/composite material composed of polyvinylidene fluoride and special fluorine-containing high polymer); when the battery sheet 31 is a double-sided battery sheet, the material of the back plate 5 is FFC or TFB. The front adhesive film 2 and the rear adhesive film 4 are made of POE or EVA.

The splicing process of the laminated tile battery piece group 3 is completed on a welding platform of a laminated tile welding machine. The number of the horizontal rows and the number of the vertical rows of the laminated tile battery plate group 3 are determined according to the actual production requirements, and the battery plate group with the number of the horizontal rows of 6 and the number of the vertical rows of 70 is taken as an example. As shown in fig. 3, during the splicing, a row of battery pieces 31 is firstly placed along the positive direction of the X axis, the number of the battery pieces is 6, and then a second row of battery pieces 31 is placed along the positive direction of the Y axis in a translation mode. The second row and the first row of the battery pieces 31 have an overlapped part in the Y-axis direction, namely, the back silver electrodes of the second row of the battery pieces 31 are attached to the front silver electrodes of the first row of the battery pieces 31. The overlap width depends on the actual production situation, but should cover the width of the silver electrode, here 1.4mm as an example. In addition, the second row and the first row of the battery pieces 31 are staggered along the X axis, that is, the 1 st battery piece 31 at the left side of the second row moves forward or backward a small distance along the positive direction of the X axis, which is set to be 8mm, and then the remaining 5 battery pieces 31 are arranged in sequence along the X axis. When the 1 st cell 31 in the third row 31 is placed, the aforementioned forward or backward displacement is cancelled, that is, the cell is aligned with the 1 st cell 31 in the first row, and the remaining 5 cells 31 are arranged in sequence along the X axis. Finally, the remaining 67 rows of cells 31 are arranged in the same manner. The battery pieces 31 in each row and among each row are bonded through the conductive adhesive 32, the bonding mode is dispensing, and the conductive adhesive 32 can adopt a pole DT-93. The two sides of the laminated tile battery piece group 3 are respectively welded with an I-shaped welding strip 33, one side of the I-shaped welding strip is welded on the front surface of the laminated tile battery piece group 3, and the other side of the I-shaped welding strip is welded on the back surface of the laminated tile battery piece group 3. A bus bar 34 is welded to the side of the i-shaped welding strip 33 to which the battery piece 31 is not welded.

As shown in fig. 4, in actual mass production of the module, a required number of battery pieces 31 are first cut by a fully automatic laser dicing saw and put into a battery case. Then, the stack welding machine completes the splicing process of the stack cell group 3 by using the cell 31 in the cell box. The spliced laminated tile battery piece group 3 is placed on a conveyor and then conveyed to a laminated tile bus bar welding machine to carry out the welding process of the I-shaped welding strips 33 and the bus bars 34. After EL appearance inspection, unqualified assemblies are screened out, qualified assemblies are conveyed to a positioning machine, and after a transparent front plate 1, a front adhesive film, a rear adhesive film and a back plate 5 are tiled, the qualified assemblies are positioned on a bearing platform at the bottom. The assembly and the platform are fed together into a laminator for lamination. And after the lamination is finished, trimming the assembly through a full-automatic trimmer. And the trimmed component enters a cooling chamber and then enters a sucker separator to be separated from the bottom bearing platform through adsorption. And finally, the assembly enters a junction box welding machine to carry out a junction box 6 installation process, and the whole production flow is finished after solidification and cleaning.

As shown in fig. 5 and 6, the flexible serial-parallel shingled photovoltaic module of the present invention has good I-V test performance, and compared with the conventional photovoltaic module with the same light receiving area, since the transmittance of the transparent front plate is lower than that of the tempered glass, the power of 362.6W is slightly reduced compared with 379.6W of the conventional module.

It should be noted that the embodiment described in the examples is only a preferred embodiment of the present invention, and it should be understood that a person skilled in the art may make several improvements and decorations without departing from the principle of the present invention, and these improvements and decorations should be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a flexible tandem connection tiling photovoltaic module, a serial communication port, including front bezel (1), preceding glued membrane (2), tiling battery piece group (3), back glued membrane (4) and backplate (5), tiling battery piece group (3) encapsulation is between front bezel (1) and backplate (5), preceding glued membrane (2) are established between front bezel (1) and tiling battery piece group (3), back glued membrane (4) are established between tiling battery piece group (3) and backplate (5), the front and the back of every battery piece (31) in tiling battery piece group (3) are equipped with electrode (311) respectively, adopt conducting resin (32) to connect between adjacent battery piece (31), conducting resin (32) are silicon-based conducting silver glue, front bezel (1) and backplate (5) are the flexbile.

2. The flexible series-parallel shingled photovoltaic module according to claim 1, wherein the cell sheet (31) is a cut-from-cell-sheet.

3. The flexible series-parallel shingled photovoltaic module according to claim 2, wherein the cut ratio of the cell sheet (31) is 1/2, 1/3, 1/4, 1/5, or 1/6.

4. The flexible series-parallel shingled photovoltaic module according to claim 1, wherein the cell sheet (31) is a single-sided cell sheet or a double-sided cell sheet.

5. The flexible series-parallel shingled photovoltaic module according to claim 4, wherein when the cell sheet (31) is a single-sided cell sheet, the backsheet (5) is a TPT sheet, a KPK sheet, a FFC sheet, a TFB sheet, or a KFB sheet.

6. Flexible series-parallel shingled photovoltaic module according to claim 4, characterized in that when the cell sheet (31) is a bifacial cell sheet, the backsheet (5) is an FFC sheet or a TFB sheet.

7. The flexible series-parallel laminated photovoltaic module as claimed in claim 1, wherein the front adhesive film (2) and the rear adhesive film (4) are POE adhesive films or EVA adhesive films.

8. The flexible series-parallel shingled photovoltaic module according to claim 1, wherein the front sheet (1) is an FFC sheet or a TFB sheet.

9. The flexible series-parallel shingled photovoltaic module according to claim 1, wherein the electrode (311) is a silver electrode.