CN217280803U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
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- CN217280803U CN217280803U CN202221141748.XU CN202221141748U CN217280803U CN 217280803 U CN217280803 U CN 217280803U CN 202221141748 U CN202221141748 U CN 202221141748U CN 217280803 U CN217280803 U CN 217280803U
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- adhesive film
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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
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Abstract
The application relates to a photovoltaic module, which comprises a battery string, a back plate and an adhesive film, wherein the battery string comprises a plurality of battery pieces, and the end parts of the adjacent battery pieces are stacked to form a stacking area; the adhesive film covers the battery string, the adhesive film comprises a back adhesive film, and the back plate, the back adhesive film and the battery string are sequentially stacked along the thickness direction of the photovoltaic module; wherein the gram weight of the back adhesive film is 200g/m 2 ～320g/m 2 Or the back adhesive film has a thickness of 0.20-0.36 mm, and the back plate has a length direction along the stacking region formed on the surface of the back adhesive filmStep-shaped convex strips extending towards the inner side. According to the photovoltaic module, the back adhesive film is the low-gram-weight adhesive film, so that the cost of the photovoltaic module is reduced, and the overall thickness of the photovoltaic module is reduced; and after lamination, a step-shaped convex strip extending along the length direction of the stacking area is formed on the surface of one side, far away from the back adhesive film, of the back plate, so that the appearance identification degree of the photovoltaic module and the appearance consistency of batch stitch welding module products are improved.
Description
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a photovoltaic module.
Background
The cell string in the novel solar photovoltaic module is formed by laminating cell sheets (tiling or stitch welding technology), and the photovoltaic module can increase the packaging density of the module by utilizing the lamination of the cell sheets so as to achieve the aim of high power. The photovoltaic module comprises a back plate, an adhesive film, a battery string and glass, wherein the adhesive film covers the battery string, and the back plate covers the adhesive film. In the existing photovoltaic module, an adhesive film with high gram weight is usually adopted, but the cost of the adhesive film with high gram weight is higher, and the overall thickness of the photovoltaic module is larger due to the adoption of the adhesive film with high gram weight.
SUMMERY OF THE UTILITY MODEL
The application provides a photovoltaic module, this kind of photovoltaic module's back glued membrane is low grammes per square metre glued membrane to one side surface that makes the backplate keep away from the back glued membrane is formed with step form sand grip.
The application provides a photovoltaic module, includes:
a battery string including a plurality of battery pieces stacked adjacent to ends of the battery pieces to form a stacking region;
a back plate;
the adhesive film covers the battery string, the adhesive film comprises a back adhesive film, and the back plate, the back adhesive film and the battery string are sequentially stacked along the thickness direction of the photovoltaic module;
wherein the gram weight of the back adhesive film is 200g/m 2 ～320g/m 2 Or the thickness of the back adhesive film is 0.20-0.36 mm, and a step-shaped convex strip extending along the length direction of the stacking area is formed on the surface of one side of the back plate far away from the back adhesive film.
In one possible embodiment, the width of the stacking area is K, K is greater than or equal to 0.1mm and less than or equal to 0.5 mm.
In one possible design, the height of the step-shaped convex strip is H, and H is more than or equal to 0.18mm and less than or equal to 0.22 mm.
In a possible design, the back adhesive film is a pre-crosslinked adhesive film, the height of the step-shaped convex strips is H, and H is more than or equal to 0.20mm and less than or equal to 0.22 mm.
In one possible design, the back plate has a first side and a second side opposite to each other in the width direction, and the step-shaped protruding strip extends from the first side to the second side.
In a possible design, the photovoltaic module includes a plurality of the cell strings, the cell strings are arranged at intervals along the width direction of the photovoltaic module, a string space region is formed between adjacent cell strings, and the step-shaped convex strip is disconnected in the string space region along the length direction of the stacking region.
In a possible design, the photovoltaic module further comprises a solder strip, the adjacent battery pieces are connected through the solder strip, and a longitudinal protrusion extending along the length direction of the solder strip is formed on the surface of one side of the back plate away from the back adhesive film.
In one possible design, the photovoltaic module further comprises glass, the adhesive film further comprises a front adhesive film, and the back plate, the back adhesive film, the battery string, the front adhesive film and the glass are sequentially stacked in the thickness direction of the photovoltaic module.
In one possible design, the backplane is a transparent backplane.
In one possible design, the adhesive film is an EVA adhesive film, a POE adhesive film, or a PVB adhesive film.
The beneficial effects of this application include at least:
the application provides a photovoltaic module, gram weight of back glued membrane is 200g/m 2 ～320g/m 2 The gram weight of the back adhesive film is lower, the cost of the low-gram-weight adhesive film is lower, the cost of the photovoltaic module is favorably reduced, and the overall thickness of the photovoltaic module is favorably reduced due to the thinner thickness of the low-gram-weight adhesive film; and because the gram weight of the back adhesive film is lower or the thickness of the back adhesive film isThe photovoltaic module is thin, the thickness of the stacking area is larger than that of the non-stacking area, after the battery pieces are laminated by matching the process of presetting large pressure, the end parts of the battery pieces in the stacking area enable the surface of one side, far away from the back glue film, of the backboard to form step-shaped convex strips extending along the length direction of the stacking area, and the appearance identification degree of the photovoltaic module and the appearance consistency of batch stitch welding module products are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
FIG. 1 is a front view of a photovoltaic module provided herein in one embodiment;
FIG. 2 is a cross-sectional view of a photovoltaic module provided herein in one particular embodiment, wherein the photovoltaic module is at a stage in a lamination process;
FIG. 3 is a front view of a photovoltaic module provided herein in an exemplary embodiment, wherein the glass and front adhesive film of the photovoltaic module are removed;
FIG. 4 is a cross-sectional view of a photovoltaic module provided herein in an embodiment wherein the photovoltaic module has solder strips and is in a stage of a lamination process;
fig. 5 is a front view of a photovoltaic module provided herein in another specific embodiment.
Reference numerals:
1-a battery string;
11-a battery piece;
12-a stacking area;
13-string pitch region;
2-a back plate;
21-step-shaped convex strips;
22-a first side edge;
23-a second side edge;
24-a longitudinal projection;
3-glue film;
31-back glue film;
32-front adhesive film;
4-glass;
5-welding the strip.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Detailed Description
In order to better understand the technical solution of the present application, the following detailed description is made with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
The embodiment of the application provides a photovoltaic module, it can be with solar energy conversion electric energy to provide the equipment in the service area with the electric energy, satisfy the power consumption demand of production, life.
As shown in fig. 1 to 3, the photovoltaic module comprises a cell string 1, a back sheet 2 and an adhesive film 3, wherein the cell string 1 comprises a plurality of cell sheets 11, and the end parts of the adjacent cell sheets 11 are stacked to form a stacking area 12; the adhesive film 3 covers the battery string 1, the adhesive film 3 comprises a back adhesive film 31, and the back plate 2, the back adhesive film 31 and the battery string 1 are sequentially stacked along the thickness direction Z of the photovoltaic module; wherein the gram weight of the back adhesive film 31 is 200g/m 2 ～320g/m 2 Or the thickness of the back adhesive film 31 is 0.20 mm-0.36 mm, and a step-shaped convex strip 21 extending along the length direction Y of the stacking area 12 is formed on the surface of the back plate 2 far away from the back adhesive film 31.
The photovoltaic module provided by the embodiment of the application, wherein the gram weight of the back adhesive film 31 is 200g/m 2 ～320g/m 2 That is, the gram weight of the back adhesive film 31 is lower, the cost of the low gram weight adhesive film is lower, which is beneficial to reducing the cost of the photovoltaic module, and the thickness of the low gram weight adhesive film is thinner, which is beneficial to reducing the whole thickness of the photovoltaic module.
The end parts of the adjacent battery pieces 11 are stacked, so that the packaging density of the photovoltaic module can be increased, and the purpose of high power is achieved.
In addition, the photovoltaic module further comprises glass 4, the adhesive film 3 further comprises a front adhesive film 32, and the back plate 2, the back adhesive film 31, the battery string 1, the front adhesive film 32 and the glass 4 are sequentially stacked along the thickness direction Z of the photovoltaic module.
The photovoltaic module production process comprises a laminating process and a laminating process, wherein in the laminating process, the glass 4 can be firstly placed on the bottommost layer, then the front adhesive film 32 is stacked on the glass 4, then the cell string 1 is stacked on the front adhesive film 32, then the back adhesive film 31 is stacked on the cell string 1, and finally the back plate 2 is stacked on the back adhesive film 31. In the lamination process, the laminator applies pressure to the laminate composed of the back sheet 2, the back adhesive film 31, the battery string 1, the front adhesive film 32, and the glass 4, and then melts the front adhesive film 32 and the back adhesive film 31, so that the back sheet 2, the battery string 1, and the glass 4 are bonded together.
The region where the battery cells 11 are not stacked may be referred to as a non-stacked region. When the gram weight of the back adhesive film 31 is 200g/m 2 ～320g/m 2 Or when the thickness of the back adhesive film 31 is 0.20mm to 0.36mm, that is, when the gram weight of the back adhesive film 31 is low or the thickness of the back adhesive film 31 is small, and because the thickness of the stacking region 12 is greater than that of the non-stacking region, when laminating is performed in accordance with a preset large pressure, the back adhesive film 31 at the overlapping edge of the battery piece 11 is further thinned, and because the back plate 2 is made of a flexible material, after the back adhesive film 31 is melted, the end portion of the battery piece 11 in the stacking region 12 can enable the surface of the back plate 2, which is far away from the back adhesive film 31, to be formed with the step-shaped convex strip 21 extending along the length direction Y of the stacking region 12.
The longitudinal direction Y of the stacking region 12 may be the width direction of the battery string 1.
The photovoltaic module in this embodiment is a photovoltaic stitch welding module, i.e. the ends of the cell pieces 11 are stacked. In the prior art, a common photovoltaic module is also provided, that is, the end parts of the cells 11 are not stacked, and the stepped raised line 21 is not easily formed on the surface of the back sheet 2 of the common photovoltaic module. Because make 2 surfaces of backplate of photovoltaic stitch welding subassembly to be formed with step form sand grip 21 through combining the cellophane and great lamination force in this embodiment for photovoltaic stitch welding subassembly in this embodiment has the degree of distinguishing in the outward appearance, is convenient for distinguish it with ordinary photovoltaic module, has improved the outward appearance uniformity of batch stitch welding subassembly product moreover.
Specifically, the height of the step-shaped convex strip 21 is H, and H is more than or equal to 0.18mm and less than or equal to 0.22 mm.
In one embodiment, the width of the stacking area 12 is K, K is 0.1mm or less and K is 0.5mm or less.
In one embodiment, the backside adhesive film 31 is a pre-crosslinked adhesive film. Compared with the non-pre-crosslinked adhesive film, the pre-crosslinked adhesive film has a certain crosslinked network before use, so that the heat resistance of the pre-crosslinked adhesive film is greatly improved, and the fluidity of resin is reduced.
In this embodiment, since the back adhesive film 31 is a pre-crosslinked adhesive film and has low fluidity, in the lamination process, after the back adhesive film 31 is melted, it is more difficult to fill the overlapped edges of the battery pieces 11, so that the step-shaped protruding strips 21 formed on the surface of the side of the back plate 2 away from the back adhesive film 31 are more obvious, and at this time, the protruding height of the step-shaped protruding strips 21 is 0.20mm to 0.22 mm.
Specifically, as shown in fig. 4, opposite sides of the battery piece 11 in the thickness direction Z of the battery piece 11 have an upper surface and a lower surface, respectively; the photovoltaic module further comprises a solder strip 5, the solder strip 5 extends from the upper surface of one of the adjacent battery pieces 11 to the lower surface of the other one of the adjacent battery pieces 11, and the adjacent battery pieces 11 can be soldered through the solder strip 5 so as to electrically connect the adjacent battery pieces 11.
When the back adhesive film 31 has a low grammage or a small thickness, the back adhesive film 31 at the position of the solder strip 5 is further thinned during the lamination process, and the back plate 2 is made of a flexible material, so that after the back adhesive film 31 is melted, as shown in fig. 5, a longitudinal protrusion 24 extending along the length direction X of the solder strip 5 is formed on the surface of the back plate 2 away from the back adhesive film 31.
The longitudinal direction X of the solder ribbon 5 may be perpendicular to the longitudinal direction Y of the stacking area 12.
In one embodiment, as shown in FIG. 1, the backboard 2 has a first side 22 and a second side 23 opposite to each other along the width direction Y, and the step-shaped protrusion 21 extends from the first side 22 to the second side 23.
In a specific embodiment, as shown in fig. 3, the photovoltaic module includes a plurality of cell strings 1, the cell strings 1 are arranged at intervals along the width direction Y of the photovoltaic module, and a string-spacing region 13 is formed between adjacent cell strings 1, that is, a gap is formed between adjacent cell strings 1, and this region does not cause step-shaped ribs 21 to be formed on the surface of the back sheet 2, that is, the step-shaped ribs 21 are disconnected in the string-spacing region 13 along the length direction Y of the stacking region 12.
Specifically, the adhesive film 3 may be an EVA adhesive film, a POE adhesive film, or a PVB adhesive film, and the corresponding material may be selected according to actual needs.
When the back adhesive film 31 is a white EVA adhesive film, the gram weight of the white EVA adhesive film is 260g/m 2 ～320g/m 2 In this case, the photovoltaic module is in a finished state, and the step-shaped convex strip 21 is formed on the surface of the back sheet 2 away from the back adhesive film 31. When the back side is gluedThe film 31 is a transparent EVA adhesive film with a gram weight of 200g/m 2 ～240g/m 2 In this case, the photovoltaic module is in a finished state, and the step-shaped convex strip 21 is formed on the surface of the back sheet 2 away from the back adhesive film 31.
In one embodiment, the backing sheet 2 is a transparent backing sheet. The transparent backboard can enable more solar rays to irradiate the battery string 1, the output power of the photovoltaic module is increased, meanwhile, the weight of the transparent backboard is light, the overall weight of the photovoltaic module can be reduced, and the transportation cost is reduced while the production cost is reduced.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A photovoltaic module, comprising:
a battery string (1), the battery string (1) comprising a plurality of battery pieces (11), the end portions of the battery pieces (11) being placed in a stacked manner adjacent to each other to form a stacked region (12);
a back plate (2);
the adhesive film (3) covers the battery string (1), the adhesive film (3) comprises a back adhesive film (31), and the back plate (2), the back adhesive film (31) and the battery string (1) are sequentially stacked along the thickness direction of the photovoltaic module;
wherein the gram weight of the back adhesive film (31) is 200g/m 2 ～320g/m 2 Or the thickness of the back adhesive film (31) is 0.20-0.36 mm, and a step-shaped convex strip (21) extending along the length direction of the stacking area (12) is formed on the surface of one side of the back plate (2) far away from the back adhesive film (31).
2. The photovoltaic module according to claim 1, characterized in that the width of the overlapping area (12) is K, K being 0.1mm ≦ K ≦ 0.5 mm.
3. The photovoltaic module according to claim 1, wherein the height of the step-shaped convex strips (21) is H, and H is more than or equal to 0.18mm and less than or equal to 0.22 mm.
4. The photovoltaic module according to claim 1, wherein the back adhesive film (31) is a pre-crosslinked adhesive film, and the step-shaped ribs (21) have a height H of 0.20mm ≤ H ≤ 0.22 mm.
5. The photovoltaic module according to claim 1, wherein the backsheet (2) has a first side edge (22) and a second side edge (23) which are oppositely arranged in the width direction, and the step-shaped rib (21) extends from the first side edge (22) to the second side edge (23).
6. The photovoltaic module according to claim 1, wherein the photovoltaic module comprises a plurality of the cell strings (1), the cell strings (1) are arranged at intervals along the width direction of the photovoltaic module, a string space region (13) is formed between the adjacent cell strings (1), and the step-shaped rib (21) is disconnected in the string space region (13) along the length direction of the stacking region (12).
7. The photovoltaic module according to claim 1, further comprising a solder strip, wherein the adjacent cell pieces (11) are connected by the solder strip (5), and a surface of the back sheet (2) on a side away from the back adhesive film (31) is formed with a longitudinal protrusion (24) extending along a length direction of the solder strip (5).
8. The photovoltaic module according to claim 1, further comprising glass (4), wherein the adhesive film (3) further comprises a front adhesive film (32), and the back sheet (2), the back adhesive film (31), the cell string (1), the front adhesive film (32) and the glass (4) are sequentially stacked in a thickness direction of the photovoltaic module.
9. The photovoltaic module according to claim 1, characterized in that the backsheet (2) is a transparent backsheet.
10. The photovoltaic module according to any of claims 1 to 9, characterized in that the adhesive film (3) is an EVA adhesive film or a POE adhesive film or a PVB adhesive film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221141748.XU CN217280803U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221141748.XU CN217280803U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280803U true CN217280803U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221141748.XU Active CN217280803U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115394867A (en) * | 2022-09-19 | 2022-11-25 | 江苏润达光伏无锡有限公司 | Solar photovoltaic module |
| CN117352575A (en) * | 2023-12-04 | 2024-01-05 | 正泰新能科技股份有限公司 | Photovoltaic cell string, photovoltaic cell panel and photovoltaic cell assembly |
-
2022
- 2022-05-12 CN CN202221141748.XU patent/CN217280803U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115394867A (en) * | 2022-09-19 | 2022-11-25 | 江苏润达光伏无锡有限公司 | Solar photovoltaic module |
| CN115394867B (en) * | 2022-09-19 | 2024-01-30 | 江苏润达光伏无锡有限公司 | Solar photovoltaic module |
| CN117352575A (en) * | 2023-12-04 | 2024-01-05 | 正泰新能科技股份有限公司 | Photovoltaic cell string, photovoltaic cell panel and photovoltaic cell assembly |
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