CN218568847U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN218568847U CN218568847U CN202222993000.9U CN202222993000U CN218568847U CN 218568847 U CN218568847 U CN 218568847U CN 202222993000 U CN202222993000 U CN 202222993000U CN 218568847 U CN218568847 U CN 218568847U
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- 229910000679 solder Inorganic materials 0.000 claims abstract description 30
- 239000002313 adhesive film Substances 0.000 claims abstract description 20
- 238000004806 packaging method and process Methods 0.000 claims abstract description 16
- 238000003475 lamination Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract description 33
- 238000000034 method Methods 0.000 abstract description 13
- 238000010030 laminating Methods 0.000 abstract description 6
- 238000010248 power generation Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009432 framing Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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- Photovoltaic Devices (AREA)
Abstract
The utility model discloses a photovoltaic module, which comprises a front plate, a first packaging adhesive film, at least one group of battery strings, a second packaging adhesive film and a back plate; the photovoltaic module further comprises a reflective film belt, the reflective film belt comprises a first reflective film belt, the distance from at least one end of the first reflective film belt to the edge of the long edge of the photovoltaic module is W, and W is larger than or equal to 25.5mm. The utility model provides a photovoltaic module, adjust to being more than or equal to 25.5mm apart from the distance of the long limit edge of photovoltaic module through the at least one end with first reflective membrane area, make first reflective membrane area avoid the subassembly outside solder strip of battery piece in the outside, the solder strip of having avoided the laminating in-process outside hunch-up contacts with reflective membrane area and causes photovoltaic module pad pasting outward appearance not good, reflective membrane area will shine the solar energy in battery piece clearance to the subassembly front bezel simultaneously, through on by the front bezel secondary reflection to the battery piece, the sunlight utilization ratio has been improved, photovoltaic module's output has been increased.
Description
Technical Field
The utility model relates to a photovoltaic technology field, more specifically relates to a photovoltaic module.
Background
A solar cell is a photoelectric semiconductor sheet that directly generates electricity using sunlight. When the photovoltaic module works, sunlight irradiates the surface of the cell, and the cell generates current due to the photoelectric effect. Because the cell plates in the assembly have gaps, only part of sunlight irradiating the whole assembly can be directly utilized by the cell plates. In order to improve the utilization rate of sunlight, technicians usually fill a reflective material in the gaps between the cells, and reflect the solar energy irradiated to the gaps between the cells to the front glass, and the solar energy is reflected to the cells through the front glass for the second time, so as to improve the utilization rate of sunlight. The position of the reflecting material determines the utilization rate of the cell pieces to light, and further the output power of the photovoltaic module is increased. The position setting of reflecting material among the prior art, it is general to the output effect that increases photovoltaic module, simultaneously, the not good condition of subassembly outward appearance can appear in the lamination in-process to the subassembly after filling reflecting material.
Therefore, it is highly desirable to provide a photovoltaic module, which solves the problem of poor appearance after the module is laminated by limiting the position relationship between the reflective film strip and the back plate, and improves the utilization rate of the solar cell to light, thereby increasing the output power of the photovoltaic module.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a photovoltaic module, including front bezel, the first encapsulation glued membrane, at least a set of battery cluster, the second encapsulation glued membrane and the backplate of arranging in proper order, the battery cluster includes at least one battery piece; the photovoltaic module further comprises a reflective film strip, the reflective film strip is positioned between the second packaging adhesive film and the back plate, the orthographic projection of the reflective film strip on the plane of the front plate is at least partially overlapped with the orthographic projection of the gap between the battery pieces on the plane of the front plate, the reflective film strip comprises at least one first reflective film strip which extends along a first direction and is arranged along a second direction, the first direction is the extending direction of the short side of the photovoltaic module, and the second direction is intersected with the first direction; along the first direction, the distance from at least one end of the first reflective film strip to the edge of the long edge of the photovoltaic module is W, and W is larger than or equal to 25.5mm.
Optionally, the reflective film strip further comprises at least one second reflective film strip extending in a second direction and aligned in the first direction.
Optionally, in a direction perpendicular to the photovoltaic module, the width of the first reflective film strip in the second direction is greater than the width of the gap between the adjacent cells, and the width of the second reflective film strip in the first direction is greater than the width of the gap between the adjacent cells.
Optionally, the cell is a P-type cell, and the distance from at least one end of the first reflective film strip to the long edge of the photovoltaic module is W 1 ，25.5mm≤W 1 ≤43.7mm。
Optionally, the distance between the edge of at least one outermost cell slice and the edge of the long side of the photovoltaic module is A 1 ，11.25mm≤A 1 ≤15.25mm，
The distance between the outermost solder strip of at least one outermost battery piece and the long edge of the photovoltaic module is B 1 ，24.4mm≤B 1 ≤28.4mm，
Optionally, the cell is an N-type cell, and the distance from at least one end of the first reflective film strip to the long edge of the photovoltaic module is W 2 ，25.5mm≤W 2 ≤34.05mm。
Optionally, the distance from the edge of at least one outermost cell to the edge of the long side of the photovoltaic module is A 2 ，11.25mm≤A 2 ≤15.25mm，
The distance between the outermost solder strip of at least one outermost cell slice and the long edge of the photovoltaic module is B 2 ，21.25mm≤B 2 ≤25.25mm，
Optionally, in a direction perpendicular to the photovoltaic module, a width of a gap between adjacent cells along the first direction is in a range of 0.9mm to 2.9mm, and a width of a gap between adjacent cells along the second direction is in a range of 1mm to 2mm.
Optionally, in a direction perpendicular to the photovoltaic module, the reflective film strip includes a reflective layer and a substrate layer that are sequentially arranged, the reflective layer includes at least one protrusion, one side of the substrate layer away from the reflective layer is provided with a back adhesive, and the reflective layer is an aluminum plated layer or a silver plated layer.
Optionally, before the photovoltaic module is laminated, at least one end of the first reflective film strip is away from the long edge of the photovoltaic module by a distance W a After the photovoltaic module is laminated, the distance from at least one end of the first reflective film strip to the long edge of the photovoltaic module is W b ，W b ＞W a 。
Compared with the prior art, the utility model provides a photovoltaic module has realized following beneficial effect at least:
the utility model provides a photovoltaic module, reflection of light membrane area sets up between second encapsulation glued membrane and backplate, reflection of light membrane area is at the planar orthographic projection at the front bezel at least partial overlap of gap between the planar orthographic projection of front bezel place and battery piece, reflection of light membrane area includes the first reflection of light membrane area that extends along the first direction and arrange along the second direction, adjust to being greater than or equal to 25.5mm apart from the long marginal distance of limit of photovoltaic module through the at least one end with first reflection of light membrane area, make the outside solder strip of subassembly outside battery piece outside avoided the at least one end in first reflection of light membrane area, it causes photovoltaic module pad pasting outward appearance not good to have avoided the contact of the solder strip that the laminating in-process outside arches with reflection of light membrane area, reflection of light membrane area will shine the solar energy in battery piece clearance to the subassembly front bezel simultaneously, through by front bezel secondary reflection to the battery piece, the sunlight utilization ratio has been improved, photovoltaic module's output has been increased.
Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of a photovoltaic module provided by the present invention;
FIG. 2 isbase:Sub>A schematic structural view ofbase:Sub>A cross-section A-A' of the photovoltaic module of FIG. 1;
FIG. 3 is a schematic structural view of a cross-section B-B' of the photovoltaic module of FIG. 1;
FIG. 4 is a top view of a portion of the retroreflective sheeting tape and the backing sheet of FIG. 1;
FIG. 5 is a top view of a portion of a photovoltaic module employing P-type cells;
FIG. 6 is a top view of a portion of a photovoltaic module employing N-type cells;
fig. 7 is a top view of a partially reflective film strip and a back sheet before lamination for a photovoltaic module provided by the present invention;
fig. 8 is a top view of the photovoltaic module laminated with the partially reflective film strip and the back sheet;
fig. 9 is a schematic structural view of the reflective film tape provided by the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 to 6, fig. 1 is a schematic structural diagram of a photovoltaic module provided by the present invention; FIG. 2 isbase:Sub>A schematic structural view ofbase:Sub>A cross-section A-A' of the photovoltaic module of FIG. 1; FIG. 3 is a schematic structural view of a cross-section B-B' of the photovoltaic module of FIG. 1; FIG. 4 is a top view of a portion of the retroreflective sheeting tape and the backing sheet of FIG. 1; FIG. 5 is a top view of a portion of a photovoltaic module employing P-type cells; fig. 6 is a plan view of a partial structure of a photovoltaic module using N-type cell sheets. The embodiment provides a photovoltaic module, which comprises a front plate 10, a first packaging adhesive film 20, at least one group of cell strings 30, a second packaging adhesive film 40 and a back plate 50 which are sequentially arranged, wherein each cell string 30 comprises at least one cell 31; the photovoltaic module further comprises a reflective film strip 60, the reflective film strip 60 is located between the second packaging adhesive film 40 and the back plate 50, the orthographic projection of the reflective film strip 60 on the plane of the front plate 10 and the orthographic projection of the gap between the battery pieces 31 on the plane of the front plate 10 are at least partially overlapped, the reflective film strip 60 comprises at least one first reflective film strip 61 extending along a first direction X and arranged along a second direction Y, the first direction X is the extending direction of the short side of the photovoltaic module, and the second direction Y is intersected with the first direction X; along the first direction X, the distance from at least one end of the first reflective film strip 61 to the long edge of the photovoltaic module is W, and W is larger than or equal to 25.5mm.
Specifically, the photovoltaic module comprises a front plate 10, a first packaging adhesive film 20, at least one group of cell strings 30, a second packaging adhesive film 40 and a back plate 50 which are sequentially arranged, wherein each cell string 30 comprises at least one cell 31; the front plate 10 can be toughened glass, the toughened glass has the advantages of high strength, high bending strength, high impact strength, good safety performance and the like, the first packaging adhesive film 20 and the second packaging adhesive film 40 can be polyethylene-polyvinyl acetate copolymer adhesive films, the polyethylene-polyvinyl acetate copolymer adhesive films are commonly called EVA adhesive films and have the advantages of high transparency, high adhesion, durability, easy storage and the like, the back plate 50 can be a polyvinyl fluoride composite solar back plate, and the polyvinyl fluoride composite solar back plate is commonly called TPT solar back plate and has the characteristics of weather resistance, aging resistance, tearing resistance, good air isolation effect, good insulativity, dimensional stability, capability of being bonded with the EVA adhesive films perfectly and the like; the photovoltaic module further comprises a reflective film strip 60, the reflective film strip 60 is located between the second packaging adhesive film 40 and the back plate 50, the orthographic projection of the reflective film strip 60 on the plane of the front plate 10 and the orthographic projection of the gap between the battery pieces 31 on the plane of the front plate 10 are at least partially overlapped, the reflective film strip 60 comprises at least one first reflective film strip 61 extending along a first direction X and arranged along a second direction Y, the first direction X is the extending direction of the short side of the photovoltaic module, and the second direction Y is intersected with the first direction X; along the first direction X, the distance from one end of the first reflective film strip 61 and/or the distance from the other end of the first reflective film strip 61 to the long edge of the photovoltaic module is W, wherein W is more than or equal to 25.5mm;
alternatively, as shown in fig. 5, the battery cell 31 is a P-type battery cell, one end of the first reflective film tape 61, and/or the first reflective film tapeThe other end of 61 is at a distance W from the edge of the long side of the photovoltaic module 1 ，25.5mm≤W 1 Less than or equal to 43.7mm; when W is 1 When the thickness is less than 25.5mm, the first reflective film strip 61 cannot avoid the outermost solder strip of the outermost cell 31, the appearance of the film of the photovoltaic module is poor easily in the laminating process, and when W is measured 1 When the thickness is larger than 43.7mm, the distance between the first reflective film strip 61 and the outermost side welding strip of the outermost side cell piece 31 is too far, and the reflective effect is poor, so that the distance range between one end of the first reflective film strip 61 and/or the other end of the first reflective film strip 61 and the long edge of the photovoltaic module is designed to be 25.5mm-43.7mm, the outermost side welding strip of the outermost side cell piece 31 is avoided conveniently, the poor film pasting appearance of the photovoltaic module in the laminating process is avoided, and the reflective effect of the first reflective film strip 61 is improved; specifically, one end of the first reflective film tape 61, and/or the other end of the first reflective film tape 61 may be 25.5mm, 29.3mm, 33.7mm, 37.9mm, or 43.7mm from the edge of the long side of the photovoltaic module; the distance from the edge of the outermost cell 31 at the two ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is A 1 ，11.25mm≤A 1 ≤15.25mm，
When A is 1 When the thickness is less than 11.25mm, the distance between the battery piece 31 and the edge of the assembly is too close, the battery piece 31 is easily shielded by a frame in the process of framing after lamination, the power generation efficiency is reduced, and when A is smaller than A, the thickness is too close to the edge of the assembly 1 When the thickness is larger than 15.25mm, the distance between the cell 31 and the edge of the assembly is too far, and the utilization rate of the area of the assembly is not high, so that the distance ranges between the edges of the outermost cell 31 at the two ends of the long edge of the assembly and the edges of the long edge of the photovoltaic assembly are both designed to be 11.25mm-15.25mm, the outermost cell 31 is prevented from being shielded, and the utilization rate of the area of the assembly is improved; specifically, the distance from the edge of the outermost cell 31 at the two ends of the long side of the photovoltaic module to the edge of the long side of the photovoltaic module can be 11.25mm, 12.25mm, 13.25mm, 14.25mm or 15.25mm; the distance from the outermost solder strip of the outermost battery piece 31 at the two outermost ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is B 1 ，24.4mm≤B 1 ≤28.4mm，
When B is present 1 When the thickness is less than 24.4mm, the outermost solder strip is too close to the edge of the battery piece 31 assembly, which easily causes short circuit of the battery piece 31, and when B is less than 1 When the thickness is larger than 28.4mm, the outermost solder strips are far away from the edges of the cell 31 assembly, the number of the solder strips of the cell 31 is reduced, and the power generation efficiency is reduced, so that the distance ranges of the outermost solder strips of the outermost cell 31 at the two ends of the long edge of the assembly and the edges of the long edge of the photovoltaic assembly are both designed to be 24.4mm-28.4mm, the short circuit of the cell 31 is avoided, and the power generation efficiency of the cell 31 is improved; specifically, the distance from the outermost solder strips of the outermost cell pieces 31 at the two ends of the long side of the photovoltaic module to the edge of the long side of the photovoltaic module can be 24.4mm, 25.4mm, 26.4mm, 27.4mm or 28.4mm.
Optionally, as shown in fig. 6, the cell 31 is an N-type cell, and one end of the first reflective film strip 61, and/or the other end of the first reflective film strip 61 is separated from the long edge of the photovoltaic module by a distance W 2 ，25.5mm≤W 2 Less than or equal to 34.05mm; when W is 2 When the thickness is less than 25.5mm, the first reflective film strip 61 cannot avoid the outermost solder strip of the outermost cell piece 31, the appearance of the film of the photovoltaic module is poor easily in the laminating process, and when W is measured 2 When the thickness is larger than 34.05mm, the distance between the first reflective film strip 61 and the outermost solder strip of the outermost cell piece 31 is too far, and the reflective effect is poor, so that the distance range between one end of the first reflective film strip 61 and/or the distance between the other end of the first reflective film strip 61 and the long edge of the photovoltaic module is designed to be 25.5mm-34.05mm, the outermost solder strip of the outermost cell piece 31 is avoided conveniently, the poor film pasting appearance of the photovoltaic module in the lamination process is avoided, and the reflective effect of the first reflective film strip 61 is improved; specifically, one end of the first reflective film strip 61, and/or the other end of the first reflective film strip 61 may be spaced from the edge of the long side of the photovoltaic module by 25.5mm, 27.3mm, 29.7mm, 31.9mm, or 34.05mm; the distance from the edge of the outermost cell 31 at the two ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is A 2 ，11.25mm≤A 2 ≤15.25mm，
When A is 2 When the thickness is less than 11.25mm, the distance between the battery piece 31 and the edge of the assembly is too close, the battery piece 31 is easily shielded by a frame in the process of framing after lamination, the power generation efficiency is reduced, and when A is smaller than A, the thickness is too close to the edge of the assembly 2 When the thickness is larger than 15.25mm, the distance between the cell 31 and the edge of the assembly is too far, and the utilization rate of the area of the assembly is not high, so that the distance ranges between the edges of the outermost cell 31 at the two ends of the long edge of the assembly and the edges of the long edge of the photovoltaic assembly are both designed to be 11.25mm-15.25mm, the outermost cell 31 is prevented from being shielded, and the utilization rate of the area of the assembly is improved; specifically, the distance from the edge of the outermost cell 31 at the two ends of the long side of the photovoltaic module to the edge of the long side of the photovoltaic module can be 11.25mm, 12.25mm, 13.25mm, 14.25mm or 15.25mm; the distance from the outermost solder strip of the outermost battery piece 31 at the two outermost ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is B 2 ，21.25mm≤B 2 ≤25.25mm，
(ii) a When B is present 2 When the thickness is less than 21.25mm, the outermost solder strip is too close to the edge of the cell 31 assembly, which easily causes short circuit of the cell 31, and when B is 2 When the thickness is larger than 25.25mm, the outermost solder strips are far away from the edges of the cell 31 assembly, the number of the solder strips of the cell 31 is reduced, and the power generation efficiency is reduced, so that the distance ranges of the outermost solder strips of the outermost cell 31 at the two ends of the long edge of the assembly and the edges of the long edge of the photovoltaic assembly are designed to be 21.25mm-25.25mm, the short circuit of the cell 31 is avoided, and the power generation efficiency of the cell 31 is improved; specifically, the distance from the outermost solder strips of the outermost cell pieces 31 at both ends of the long side of the module to the edge of the long side of the photovoltaic module can be 21.25mm, 22.25mm, 23.25mm, 24.25mm or 25.25mm.
Compared with the prior art, the photovoltaic module provided by the embodiment at least realizes the following beneficial effects:
the embodiment provides a photovoltaic module, reflection of light membrane area sets up between second encapsulation glued membrane and backplate, reflection of light membrane area is at least partly overlap at the planar orthographic projection of front bezel place in the clearance between the battery piece, reflection of light membrane area includes the first reflection of light membrane area that extends along the first direction and arranges along the second direction, adjust to being greater than or equal to 25.5mm through the distance with the long limit edge of photovoltaic module with at least one end of first reflection of light membrane area, make the outermost side solder strip of the outside battery piece of subassembly is avoided to at least one end of first reflection of light membrane area, it causes photovoltaic module pad pasting outward appearance not good to have avoided the contact of the solder strip that the outside arches in the lamination process with reflection of light membrane area, reflection of light membrane area will shine the battery piece clearance solar energy reflection to the subassembly front bezel simultaneously, through by front bezel secondary reflection on the battery piece, sunlight utilization ratio has been improved, photovoltaic module's output has been increased.
In an alternative embodiment, and with continued reference to FIGS. 1-6, the strip of retroreflective film 60 further includes at least one second strip of retroreflective film 62 extending in the second direction Y and aligned in the first direction X.
Specifically, the second reflective film strip 62 intersects with the first reflective film strip 61, and the distance from at least one end of the second reflective film strip 62 to the edge of the short side of the photovoltaic module is the same as that in the prior art, which is not described herein again.
In an alternative embodiment, fig. 7 is a top view of a photovoltaic module provided by the present invention before lamination of a partially reflective film strip with a backsheet; fig. 8 is a top view of the photovoltaic module laminated with the partially reflective film strip and the back sheet; referring to fig. 7-8, before lamination of the photovoltaic module, at least one end of the first reflective film strip 61 is spaced from the long edge of the photovoltaic module by a distance W a After the photovoltaic module is laminated, the distance from at least one end of the first reflective film strip 61 to the long edge of the photovoltaic module is W b ，W b ＞W a 。
Specifically, the strips of reflective film shrink after lamination of the assembly, such that at least one end of the first strip of reflective film 61 is spaced from the long edge of the photovoltaic assembly by a distance W after lamination b Will be greater than the distance W from at least one end of the first reflective film strip 61 to the long edge of the photovoltaic module before lamination a ，W b And W a The difference of (a) is about 5mm.
In an alternative embodiment, as shown with continued reference to fig. 2-3, the width of the first strip of reflective film 61 in the second direction Y is greater than the width of the gap between adjacent cells 31 and the width of the second strip of reflective film 62 in the first direction X is greater than the width of the gap between adjacent cells 31 in the direction perpendicular to the photovoltaic module.
Specifically, in the direction perpendicular to the photovoltaic module, the width range of the gap between the adjacent battery pieces 31 along the first direction X is 0.9mm-2.9mm, when the width of the gap between the adjacent battery pieces 31 along the first direction X is less than 0.9mm, the adjacent battery pieces 31 are too close to each other, which easily causes short circuit of the adjacent battery strings 30, and when the width of the gap between the adjacent battery pieces 31 along the first direction X is greater than 2.9mm, the adjacent battery pieces 31 are too far to reduce the power generation efficiency of the module, so that the width of the gap between the adjacent battery pieces 31 along the first direction X is designed to be 0.9mm-2.9mm, which not only prevents the short circuit of the adjacent battery strings 30, but also improves the power generation efficiency of the module; specifically, the width of the gap between the adjacent battery pieces 31 in the first direction X may be 0.9mm, 1.4mm, 1.9mm, 2.4mm, or 2.9mm; the width range of the gap between the adjacent battery pieces 31 along the second direction Y is 1mm-2mm, when the width of the gap between the adjacent battery pieces 31 along the second direction Y is less than 1mm, the adjacent battery pieces 31 are too close to be beneficial to welding the battery pieces 31 into the battery string 30, and when the width of the gap between the adjacent battery pieces 31 along the second direction Y is more than 2mm, the adjacent battery pieces 31 are too far away to reduce the power generation efficiency of the battery string 30, so the width of the gap between the adjacent battery pieces 31 along the second direction Y is designed to be 1mm-2mm, which not only facilitates welding the battery pieces 31 into the battery string 30, but also improves the power generation efficiency of the battery string 30; specifically, the width of the gap between the adjacent battery sheets 31 in the second direction Y may be 1mm, 1.3mm, 1.5mm, 1.8mm, or 2mm.
It should be noted that only when the width of the first reflective film strip 61 in the second direction Y is greater than the width of the gap between the adjacent cells 31 and the width of the second reflective film strip 62 in the first direction X is greater than the width of the gap between the adjacent cells 31 in the direction perpendicular to the photovoltaic module, the first reflective film strip 61 and the second reflective film strip 62 can reflect the sunlight irradiated to the gap between the cells 31 to the front plate of the module as much as possible, and further reflect the sunlight to the cells 31 through the front plate, so that the utilization rate of the sunlight can be improved. When the width of the first reflective film strip 61 in the second direction Y is less than or equal to the width of the gap between the adjacent battery pieces 31, the width of the second reflective film strip 62 in the first direction X is less than or equal to the width of the gap between the adjacent battery pieces 31, and the reflective film strip contracts after the assembly is laminated, the width of the laminated first reflective film strip 61 in the second direction Y is less than the width of the gap between the adjacent battery pieces 31, and the width of the second reflective film strip 62 in the first direction X is less than the width of the gap between the adjacent battery pieces 31, so that the reflectivity of the first reflective film strip 61 and the second reflective film strip 62 to sunlight is reduced, and the power generation efficiency of the assembly is influenced.
In an alternative embodiment, fig. 9 is a schematic structural view of the reflective film strip provided by the present invention; referring to fig. 9, the reflective film strip 60 includes a reflective layer 601 and a base layer 602 sequentially arranged in a direction perpendicular to the photovoltaic module, the reflective layer 601 includes at least one protrusion 6011, a back adhesive is disposed on a side of the base layer 602 away from the reflective layer 601, and the reflective layer 601 is an aluminum plated layer or a silver plated layer.
Specifically, the reflective layer 601 includes at least one protrusion 6011 thereon, and when sunlight irradiates the reflective film strip 60, the protrusion 6011 reflects the sunlight to the module front plate 10, and secondarily reflects the sunlight onto the cell sheet 31 via the front plate 10; the reflecting layer 601 can be an aluminum plating layer or a silver plating layer, and the materials can increase the reflecting effect of the reflecting layer 601, improve the sunlight utilization rate and increase the output power of the photovoltaic module; the side of the substrate layer 602 away from the reflective layer 601 is provided with a back adhesive to facilitate the adhesion of the reflective film strip 60 to the back plate 50.
It should be noted that the present invention has the following requirements for the reflective film strip 60: (1) Along the first direction X, the distance from one end of the first reflective film strip 61 and/or the distance from the other end of the first reflective film strip 61 to the long edge of the photovoltaic module is W, wherein W is more than or equal to 25.5mm; (2) In the direction perpendicular to the photovoltaic module, the width of the first reflective film strip 61 in the second direction Y is greater than the width of the gap between the adjacent cell pieces 31, and the width of the second reflective film strip 62 in the first direction X is greater than the width of the gap between the adjacent cell pieces 31. On the premise of meeting the above two requirements, the structure and material of the reflective film strip 60 can be adjusted according to actual conditions, and will not be described herein again.
When the laminated solar cell module is used specifically, firstly, the components to be laminated are laminated according to the sequence of the back plate 50, the reflective film strip 60, the second packaging adhesive film 40, the cell string 30, the first packaging adhesive film 20 and the front plate 10, and then the components to be laminated are laminated. The reflective film strip 60 comprises at least one first reflective film strip 61 extending along a first direction X and arranged along a second direction Y, wherein the first direction X is the extending direction of the short side of the photovoltaic module, and the second direction Y is intersected with the first direction X; along the first direction X, the distance from one end of the first reflective film strip 61 and/or the distance from the other end of the first reflective film strip 61 to the edge of the long edge of the photovoltaic module is W, wherein W is more than or equal to 25.5mm; when the cell 31 is a P-type cell 31, the distance between one end of the first reflective film strip 61 and/or the other end of the first reflective film strip 61 and the long edge of the photovoltaic module is W 1 ，25.5mm≤W 1 Less than or equal to 43.7mm; when the cell 31 is an N-type cell 31, one end of the first reflective film strip 61, and/or the other end of the first reflective film strip 61 is spaced from the long edge of the photovoltaic module by a distance W 2 ，25.5mm≤W 2 ≤34.05mm。
In some alternative embodiments, as shown in fig. 5, fig. 5 is a top view of a partial structure of a photovoltaic module using P-type cells, one end of the first reflective film strip 61, and/or the other end of the first reflective film strip 61 is at a distance W from the edge of the long side of the photovoltaic module 1 ，25.5mm≤W 1 Less than or equal to 43.7mm; the distance from the edge of the outermost cell 31 at the two ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is A 1 ，11.25mm≤A 1 ≤15.25mm，
The distance from the outermost solder strip of the outermost battery piece 31 at the two outermost ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is B 1 ，24.4mm≤B 1 ≤28.4mm，
In some alternative embodiments, as shown in fig. 6, fig. 6 is a top view of a partial structure of a photovoltaic module using N-type cells, one end of the first reflective film strip 61, and/orThe distance between the other end of the first reflective film strip 61 and the long edge of the photovoltaic module is W 2 ，25.5mm≤W 2 Less than or equal to 34.05mm; the distance from the edge of the outermost cell 31 at the two ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is A 2 ，11.25mm≤A 2 ≤15.25mm，
The distance from the outermost solder strips of the outermost battery pieces 31 at the two ends of the long edge of the assembly to the edge of the long edge of the photovoltaic assembly is B 2 ，21.25mm≤B 2 ≤25.25mm，
According to the above embodiment, the utility model provides a photovoltaic module has realized following beneficial effect at least:
the utility model provides a photovoltaic module, reflection of light membrane area sets up between second encapsulation glued membrane and backplate, reflection of light membrane area is at the planar orthographic projection at the front bezel at least partial overlap of gap between the planar orthographic projection of front bezel place and battery piece, reflection of light membrane area includes the first reflection of light membrane area that extends along the first direction and arrange along the second direction, adjust to being greater than or equal to 25.5mm apart from the long marginal distance of limit of photovoltaic module through the at least one end with first reflection of light membrane area, make the outside solder strip of subassembly outside battery piece outside avoided the at least one end in first reflection of light membrane area, it causes photovoltaic module pad pasting outward appearance not good to have avoided the contact of the solder strip that the laminating in-process outside arches with reflection of light membrane area, reflection of light membrane area will shine the solar energy in battery piece clearance to the subassembly front bezel simultaneously, through by front bezel secondary reflection to the battery piece, the sunlight utilization ratio has been improved, photovoltaic module's output has been increased.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A photovoltaic module is characterized by comprising a front plate, a first packaging adhesive film, at least one group of cell strings, a second packaging adhesive film and a back plate which are sequentially arranged, wherein each cell string comprises at least one cell piece;
the photovoltaic module further comprises a reflective film strip, the reflective film strip is located between the second packaging adhesive film and the back plate, the orthographic projection of the reflective film strip on the plane of the front plate is at least partially overlapped with the orthographic projection of the gap between the battery pieces on the plane of the front plate, the reflective film strip comprises at least one first reflective film strip extending along a first direction and arranged along a second direction, the first direction is the extending direction of the short side of the photovoltaic module, and the second direction is intersected with the first direction;
and along the first direction, the distance from at least one end of the first reflective film strip to the long edge of the photovoltaic module is W, and W is more than or equal to 25.5mm.
2. The photovoltaic module of claim 1, wherein the strip of reflective film further comprises at least one second strip of reflective film extending in the second direction and aligned in the first direction.
3. The assembly of claim 2, wherein the first strip of retroreflective film has a width in the second direction that is greater than a width of a gap between adjacent ones of the cells in a direction perpendicular to the assembly, and the second strip of retroreflective film has a width in the first direction that is greater than a width of a gap between adjacent ones of the cells.
4. The photovoltaic module according to claim 1, wherein the cell is a P-type cell, and at least one end of the first reflective film strip is spaced from the long edge of the photovoltaic module by a distance W 1 ，25.5mm≤W 1 ≤43.7mm。
5. The PV module of claim 4, wherein at least one outermost edge of the plurality of cells is spaced a distance A from a long edge of the PV module 1 ，11.25mm≤A 1 ≤15.25mm，
The distance between the outermost solder strip of at least one outermost side of the battery piece and the long edge of the photovoltaic module is B 1 ，24.4mm≤B 1 ≤28.4mm，
6. The photovoltaic module according to claim 1, wherein the cell is an N-type cell, and at least one end of the first reflective film strip is spaced from the long edge of the photovoltaic module by a distance W 2 ，25.5mm≤W 2 ≤34.05mm。
7. The assembly according to claim 6, wherein the distance from the edge of the outermost cell to the edge of the long side of the assembly is A 2 ，11.25mm≤A 2 ≤15.25mm，
The distance between the outermost solder strip of at least one outermost side of the battery piece and the long edge of the photovoltaic module is B 2 ，21.25mm≤B 2 ≤25.25mm，
8. The pv module of claim 1 wherein the width of the gap between adjacent cells in the first direction in a direction perpendicular to the pv module is in the range of 0.9mm to 2.9mm and the width of the gap between adjacent cells in the second direction is in the range of 1mm to 2mm.
9. The photovoltaic module according to claim 1, wherein the reflective film strip comprises a reflective layer and a substrate layer arranged in sequence in a direction perpendicular to the photovoltaic module, the reflective layer comprises at least one protrusion, a back adhesive is disposed on a side of the substrate layer away from the reflective layer, and the reflective layer is an aluminum plated layer or a silver plated layer.
10. The assembly according to any one of claims 1-9, wherein at least one end of the first strip of reflective film is spaced from the edge of the long side of the assembly by a distance W before lamination of the assembly a After the photovoltaic module is laminated, the distance from at least one end of the first reflective film strip to the long edge of the photovoltaic module is W b ，W b ＞W a 。
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| EP4456151A1 (en) * | 2023-04-28 | 2024-10-30 | Jinko Solar Co., Ltd | Photovoltaic module and manufacturing method for photovoltaic module |
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