SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a package glued membrane and by the photovoltaic module that its encapsulation obtained, the package glued membrane includes net type glued membrane layer, net type glued membrane layer is including covering first gridline on the solder strip of treating the battery cluster layer of encapsulation, covering the second gridline in the clearance of the battery cluster of treating the battery cluster layer of encapsulation and covering the third gridline in the battery piece clearance on battery cluster layer, adopt the photovoltaic module of package glued membrane encapsulation, not only photovoltaic module's material cost obviously reduces, and in the package glued membrane be provided with of net type glued membrane layer do benefit to the in-process glued membrane packing battery cluster layer surface's of photovoltaic module lamination space and cover the solder strip to further improve the efficiency of lamination process, reduce photovoltaic module's cost.
In order to achieve the purpose of the utility model, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides a packaging adhesive film, packaging adhesive film includes net type glued membrane layer 1, net type glued membrane layer 1 is including covering first gridlines 10 on waiting to encapsulate the solder strip on battery cluster layer, covering the second gridlines 11 in the clearance of waiting to encapsulate the battery cluster on battery cluster layer and covering the third gridlines 12 in the battery piece clearance of waiting to encapsulate the battery cluster on battery cluster layer.
The gap of the battery string on the battery string layer of the utility model refers to the gap between the battery string on the battery string layer and the battery string, and the extending direction of the gap is parallel to the direction of the welding strip; the gaps between the battery sheets in the battery string of the battery string layer refer to the gaps between the battery sheets in the single battery string of the battery string layer.
The packaging adhesive film of the utility model comprises a grid type adhesive film layer, the grid type adhesive film layer comprises a first grid line covering the welding strip of the battery string layer to be packaged, a second grid line covering the clearance of the battery string layer to be packaged and a third grid line covering the clearance of the battery piece in the battery string of the battery string layer, when the packaging adhesive film is used, the thickness of the welding strip of the battery string layer, the battery string gap and the packaging adhesive film at the position of the battery piece gap in the battery string is thicker, the thickness of the packaging adhesive film at other positions is thinner, so that the packaging adhesive film is beneficial to filling gaps on the battery string layer and covering the welding strips in the packaging laminating process, thereby optimize the effect of lamination, and adopt the encapsulation glued membrane encapsulates, is favorable to reducing photovoltaic module's material cost (the utility model discloses the quantity that encapsulation glued membrane is used for photovoltaic module's packaging process encapsulation glued membrane has reduced 30-35%).
Preferably, the width of the first grid line 10 > the width of the solder strip of the battery string layer to be encapsulated, and the difference between the widths is 2-5mm, such as 2.5mm, 3mm, 3.5mm, 4mm or 4.5 mm.
The first grid line of the utility model corresponds to the position of the welding strip of the battery string layer to be packaged, and in the packaging process, the glue film is melted and then is accumulated into an arc-shaped structure around the welding strip; the width of the grid lines in the first direction is wider than that of the solder strips of the battery string layer to be packaged, so that the solder strips can be better covered.
Preferably, the width of the first grid lines 10 is 3-15mm, such as 5mm, 7mm or 9mm, etc.
Preferably, the first grid lines 10 have a thickness of 0.01-0.4mm, such as 0.05mm, 0.1mm, 0.2mm, 0.3mm, or 0.4mm, etc.
The width of the first grid line is 3-15mm, which is more favorable for covering the welding strip, and when the width is less than 3mm, the first grid line is not favorable for covering the welding strip.
The thickness of the first grid line of the utility model is 0.01-0.4mm, which is more beneficial to covering the welding strip, and when the thickness is less than 0.01mm, the first grid line is not beneficial to covering the welding strip; when the thickness is more than 0.4mm, the processing is not facilitated.
First net mark's effect lies in and welds the area and correspond the setting, and better covering welds the area.
Preferably, the width of the second grid lines 11 is 6-20mm, such as 7mm, 9mm, 11mm, 13mm, 15mm, 17mm, 19mm, or the like.
Preferably, the thickness of the second grid lines 11 is 0.01-0.3mm, such as 0.05mm, 0.1mm, 0.15mm, 0.2mm, or 0.25mm, etc.
The second gridlines corresponds the setting with the clearance of treating the battery cluster on battery cluster layer of encapsulation, and its clearance that can effectively fill the battery cluster in the lamination process to optimize the lamination effect.
Preferably, the width of the third grid lines 12 is more than 2 times the width of the first grid lines 10.
Preferably, the third grid lines 12 have a thickness of 0.01-0.3mm, such as 0.05mm, 0.1mm, 0.15mm, 0.2mm, or 0.25mm, etc.
Preferably, the third grid lines 12 have a width of 6-20mm, such as 7mm, 9mm, 11mm, 13mm, 15mm, 17mm, 19mm, or the like.
The third gridlines corresponds the setting with the battery piece clearance of treating in the battery cluster on encapsulation battery cluster layer, and in the packaging process, the third gridlines can fill the clearance of the battery piece in the battery cluster on battery cluster layer to optimize the effect of lamination.
Preferably, the vertical cross-sectional shape of the gridlines of gridline rete is the rectangle to first gridline is for example, if the width of gridline is 5mm, the thickness of gridline is 0.2mm, then its vertical cross-section is long 5mm, wide 0.2 mm's rectangle.
Preferably, the packaging adhesive film further comprises a white adhesive film layer 2 located between the battery string layer to be packaged and the grid-type adhesive film layer 1, and the thickness of the white adhesive film layer 2 is 0.05-0.3mm, such as 0.1mm, 0.15mm, 0.2mm or 0.25 mm.
Preferably, the packaging adhesive film further comprises an intermediate adhesive film layer 3 located between the white adhesive film layer 2 and the grid-type adhesive film layer 1, and the thickness of the intermediate adhesive film layer 3 is 0.1-0.4mm, such as 0.15mm, 0.2mm, 0.25mm, 0.3mm, or 0.35 mm.
The utility model discloses the glue film layer is the same with the material of net type glue film layer in the middle of setting up, and the effect of white glue film layer lies in the reflection that increases light, improves the output of subassembly.
Preferably, the material of the encapsulant film 1 is Ethylene-vinyl acetate Copolymer (EVA) or Polyolefin elastomer (POE).
In a second aspect, the utility model provides a photovoltaic module, photovoltaic module includes battery cluster layer 4, front encapsulation glued membrane layer 5 and back encapsulation glued membrane layer 6, battery cluster layer 4 is located between front encapsulation glued membrane layer 5 and the back encapsulation glued membrane layer 6, back encapsulation glued membrane layer 6 adopts as the first aspect the encapsulation glued membrane, the first gridline 10 of the net type glued membrane layer 1 of encapsulation glued membrane covers on the solder strip of battery cluster layer 4, the second gridline 11 of the net type glued membrane layer 1 of encapsulation glued membrane covers on the clearance of the battery cluster of battery cluster layer 4, the third gridline 12 of the net type glued membrane layer 1 of encapsulation glued membrane covers on the battery piece clearance in the battery cluster of battery cluster layer 4.
Preferably, the number of the first grid lines 10 is the same as the number of the main grid lines of the cell string layer 4.
Preferably, the number of the second grid lines 11 is one more than the number of the cell strings of the cell string layer 4. For example, if the cell string layer includes 6 cell strings, the number of the second grid lines is 7.
Preferably, the number of the third grid lines 12 is one more than the number of the battery cells of the single battery string of the battery string layer 4. For example, if the number of cells in each cell string is 12, the number of the third grid lines is 13.
Preferably, one side of the front surface packaging adhesive film layer 5, which is back to the battery string layer 4, is provided with front surface glass 7, and one side of the back surface packaging adhesive film layer 6, which is back to the battery string layer 4, is provided with a back plate 8.
Preferably, the front side packaging adhesive film layer 5 is an ultraviolet transmitting adhesive film, and the back side packaging adhesive film layer 6 is an ultraviolet cut-off adhesive film.
Preferably, the photovoltaic module further comprises a frame and a junction box.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the packaging adhesive film comprises a grid-type adhesive film layer, the grid-type adhesive film layer comprises a first grid line covering a welding strip of a battery string layer to be packaged, a second grid line covering a battery string gap of the battery string layer to be packaged and a third grid line covering a battery piece gap in a battery string of the battery string layer to be packaged, and in the packaging process of the photovoltaic module, the packaging adhesive film can be filled with the gap entering the battery string layer through lamination and covers the welding strip, so that the laminating effect is optimized;
(2) when the encapsulation glued membrane is used for encapsulating photovoltaic module, when guaranteeing subassembly efficiency and photovoltaic module reliability for the quantity of encapsulation glued membrane has reduced 30-35% than using conventional encapsulation glued membrane.