CN217280804U - Photovoltaic module - Google Patents
Photovoltaic module Download PDFInfo
- Publication number
- CN217280804U CN217280804U CN202221143489.4U CN202221143489U CN217280804U CN 217280804 U CN217280804 U CN 217280804U CN 202221143489 U CN202221143489 U CN 202221143489U CN 217280804 U CN217280804 U CN 217280804U
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- photovoltaic module
- adhesive film
- stacking
- battery
- module according
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- 239000002313 adhesive film Substances 0.000 claims abstract description 60
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 4
- 239000000155 melt Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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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- Photovoltaic Devices (AREA)
Abstract
The application relates to the technical field of photovoltaic modules, in particular to a photovoltaic module. This kind of photovoltaic module includes: 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, the back plate, the back adhesive film and the battery string are sequentially stacked along the thickness direction of the photovoltaic module, a protruding portion is arranged in a stacking area at least corresponding to the part of the back adhesive film, and the protruding portion is located on the surface, facing the back plate, of the back adhesive film. According to the photovoltaic module, the back adhesive film at least corresponds to part of the stacking area and is provided with the bulge part, so that the back adhesive film at the overlapping edge of the cell is thicker; when laminating, after the back glued membrane melts, can fill the battery piece and overlap the edge, and then alleviate or eliminate the backplate and keep away from the convex stripe that back glued membrane one side surface formed, and then be favorable to making the backplate surfacing, reduce the latent risk of splitting of battery piece, promote the product yield.
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 stacking cell plates (tiling or stitch welding technology), and the photovoltaic module can increase the packaging density of the module by utilizing the stacking of the cell plates so as to achieve the aim of high power. However, since the height of the stacking region of the stacked battery cell is greater than that of the single layer region, the surface of the back sheet facing the outside may be formed with a stripe after the lamination process, which increases the risk of the hidden crack of the battery cell when the stripe contacts an external object.
SUMMERY OF THE UTILITY MODEL
The present application provides a photovoltaic module that can mitigate or eliminate surface markings of a backsheet.
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 stacked region;
a back plate;
the adhesive film covers the battery string, the adhesive film comprises a back adhesive film, the back adhesive film and the battery string are sequentially stacked in the thickness direction of the photovoltaic module, the back adhesive film at least corresponds to the part of the back adhesive film, a protruding portion is arranged in the stacking area, and the protruding portion is located on the surface, facing the back adhesive film, of one side of the back plate.
In one possible design, the grammage of the projection is 10g/m 2 ～20g/m 2 。
In one possible embodiment, the width of the projection is K, the width of the stacking area is W, and K is greater than or equal to 3W and less than or equal to 5W.
In one possible design, the width of the projection is K, K is greater than or equal to 0.3mm and less than or equal to 2.5 mm.
In one possible design, the battery string has a non-stacking region, the back adhesive film includes a connection part and a covering part, the protrusion part is formed on the connection part, the connection part covers the stacking region, the covering part covers the non-stacking region, and the gram weight of the covering part is 200g/m 2 ～300g/m 2 。
In one possible design, the cross-sectional shape of the protrusion is semicircular, rectangular or trapezoidal along the thickness direction of the back adhesive film.
In one possible design, the battery string has a plurality of stacking areas, the back adhesive film is provided with a plurality of protrusions, and the protrusions correspond to the stacking areas one to one.
In one possible design, the stacking area includes at least a first stacking area, a second stacking area, and a third stacking area, the second stacking area being located between the first stacking area and the third stacking area;
the back glue film comprises a first connecting portion and a second connecting portion, the protruding portion comprises a first protruding portion and a second protruding portion which are arranged adjacently, the first protruding portion is formed on the first connecting portion, the second protruding portion is formed on the second connecting portion, the first connecting portion covers in the first stacking area, and the second connecting portion covers in the third stacking area.
In one possible design, the back adhesive film has a first side and a second side opposite to each other in the width direction, and the protrusion extends from the first side to the second side.
In a possible design, the photovoltaic module comprises a plurality of the battery strings, the plurality of the battery strings are arranged at intervals along the width direction of the photovoltaic module, a string spacing area is formed between every two adjacent battery strings, and the protruding portions are disconnected in the string spacing area along the width direction of the back adhesive film.
The beneficial effect of this application includes at least:
according to the photovoltaic module provided by the application, the bulge part is arranged at the stacking area corresponding to at least part of the back adhesive film, namely the bulge part is a part of the back adhesive film, and the back adhesive film at the stacking edge of the cell is thicker due to the existence of the bulge part; when the lamination, after the back glued membrane melts, can fill the battery piece and overlap the edge, and then alleviate or eliminate the backplate and keep away from the protruding stripe that back glued membrane one side surface formed, and then be favorable to making the backplate surfacing, reduce the latent risk of splitting of battery piece, promote the product yield.
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 cross-sectional view of a photovoltaic module provided herein in one embodiment;
FIG. 2 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. 3 is a cross-sectional view of a photovoltaic module provided herein in another embodiment;
FIG. 4 is a front view of a backside adhesive film provided herein in one embodiment.
Reference numerals are as follows:
1-a battery string;
11-a battery piece;
12-a stacking area;
121 — a first stacking area;
122-a second stacking area;
123-a third stacking area;
13-non-overlapping area;
14-string spacing region;
2-glue film;
21-back adhesive film;
211-a boss;
211 a-first boss;
211 b-a second boss;
212-a connecting portion;
212 a-first connection;
212 b-a second connection;
213-a cover;
214-a first side edge;
215-a second side edge;
22-front adhesive film;
3-a back plate;
4-glass.
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 use area with the electric energy, satisfy the power consumption demand of production, life.
As shown in fig. 1 to 4, the X direction is the length direction of the photovoltaic module, the Y direction is the width direction of the photovoltaic module, and the Z direction is the thickness direction of the photovoltaic module.
As shown in fig. 1, the photovoltaic module comprises a cell string 1, a back sheet 3 and an adhesive film 2, 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 2 covers the battery string 1, the adhesive film 2 comprises a back adhesive film 21, and the back plate 3, the back adhesive film 21 and the battery string 1 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 the adhesive film 2 and the cell string 1 are placed in a laminated mode, then pressure is applied to the module in the laminating process, and the adhesive film 2 is melted to package the cell string 1. The adhesive film 2 can play a role in packaging and protecting the photovoltaic module, can improve the photoelectric conversion efficiency of the module, and can prolong the service life of the module.
The end parts of the adjacent battery plates 11 are stacked, so that the packaging density of the photovoltaic module can be increased, and the aim of high power is fulfilled. The region where the battery cells 11 are not stacked may be referred to as a non-stacked region 13. The thickness of the overlapping area 12 is greater than the thickness of the non-overlapping area 13.
When the grammage of the back adhesive film 21 is low or the thickness is thin, because the thickness of the stacking region 12 is greater than that of the non-stacking region 13, the back adhesive film 21 at the overlapping edge of the battery piece 11 is further thinned during lamination, and because the back plate 3 is made of a flexible material, after the back adhesive film 21 is melted, the end of the battery piece 11 in the stacking region 12 causes the surface of the back plate 3 on the side away from the back adhesive film 21 to form convex stripes. When the photovoltaic module is in use, when the convex stripes are in contact with an external object, the relative positions of the convex stripes are higher, so that the stress distribution of the convex stripes and the areas with lower relative positions is uneven, and the hidden cracking risk of the cell 11 is increased.
To solve the technical problem, as shown in fig. 1, in the present embodiment, the back adhesive film 21 is provided with a protruding portion 211 at least corresponding to a part of the stacking area 12, that is, the protruding portion 211 is a part of the back adhesive film 21, and due to the existence of the protruding portion 211, the back adhesive film 21 at the overlapped edge of the battery piece 11 is thicker; during lamination, after the back adhesive film 21 is melted, the overlapped edges of the battery pieces 11 can be filled, so that convex stripes formed on the surface of one side, far away from the back adhesive film 21, of the back plate 3 are reduced or eliminated, the surface of the back plate 3 is smooth, the hidden crack risk of the battery pieces 11 is reduced, and the product yield is improved.
Specifically, the grammage of the convex portion 211 is 10g/m 2 ～20g/m 2 。
In addition, as shown in fig. 1, the photovoltaic module further includes glass 4, the adhesive film 2 further includes a front adhesive film 22, and the back sheet 3, the back adhesive film 21, the battery string 1, the front adhesive film 22 and the glass 4 are sequentially stacked along a thickness direction Z of the photovoltaic module.
In one embodiment, the width of the protruding portion 211 is K, the width of the stacking area 12 is W, K is greater than or equal to 3W and less than or equal to 5W, and it is convenient to align the area provided with the protruding portion 211 with the stacking area 12 in the stacking process, so that the alignment precision requirement is low and the universality is achieved.
Specifically, the width of the protrusion 211 may be 0.3mm to 2.5 mm.
More specifically, the width of the stacking area 12 may be 0.1mm to 0.5mm, and the width of the corresponding protrusion 211 may be 0.5 to 2.5 mm.
In one embodiment, as shown in FIG. 1, the backside adhesive film 21 includes a connection portion 212 and a covering portion 213, the protrusion portion 211 is formed on the connection portion 212, the connection portion 212 covers the stacking region 12, the covering portion 213 covers the non-stacking region 13, and the covering portion 213 has a grammage of 200g/m 2 ～300g/m 2 I.e. the grammage of the covering portion 213 is low.
In this embodiment, the battery pieces 11 are not stacked in the non-stacking area 13, and after the lamination process, the back plate 3 does not form a convex stripe corresponding to the non-stacking area 13; since the covering part 213 covers the non-stacking area 13, the grammage of the covering part 213 can be reduced, which is favorable for reducing the overall grammage of the back adhesive film 21, so that the cost is reduced.
Specifically, the cross-sectional shape of the convex portion 211 is a semicircle or a rectangle or a trapezoid along the thickness direction Z of the back adhesive film 21.
As shown in fig. 1, in this embodiment, the cross-sectional shape of the protruding portion 211 is a semicircle, which is simple in structure and easy to manufacture.
In one embodiment, the battery string 1 has a plurality of stacking areas 12, the back adhesive film 21 has a plurality of protrusions 211, and the protrusions 211 correspond to the stacking areas 12 one by one, which is favorable for eliminating all the convex stripes on the surface of the back plate 3.
In another specific embodiment, as shown in fig. 3, the stacking area 12 includes at least a first stacking area 121, a second stacking area 122, and a third stacking area 123, the second stacking area 122 being located between the first stacking area 121 and the third stacking area 123; the connecting portion 212 includes a first connecting portion 212a and a second connecting portion 212b, the protruding portion 211 includes a first protruding portion 211a and a second protruding portion 211b that are adjacently disposed, the first protruding portion 211a is formed on the first connecting portion 212a, the second protruding portion 211b is formed on the second connecting portion 212b, the first connecting portion 212a covers the first stacking area 121, and the second connecting portion 212b covers the third stacking area 123.
The number of the second overlap area 122 may be one or more.
In this embodiment, the protruding portions 211 do not correspond to the stacking areas 12 one to one, so that the number of the protruding portions 211 is reduced, which is beneficial to reducing the production cost.
In one embodiment, as shown in fig. 4, the back adhesive film 21 has a first side 214 and a second side 215 opposite to each other along the width direction Y, and the protrusion 211 extends from the first side 214 to the second side 215, so as to ensure that the region of the back adhesive film 21 with the protrusion 211 completely covers the stacking region 12.
In another embodiment, as shown in fig. 2, 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 14 is formed between adjacent cell strings 1, that is, a gap is formed between adjacent cell strings 1, which does not cause the surface of the back sheet 3 to form a convex stripe, so that the protrusion 211 may not be correspondingly disposed in the string spacing region 14, that is, along the width direction Y of the back adhesive film 21, and the protrusion 211 is disconnected in the string spacing region 14.
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 (3);
glued membrane (2), glued membrane (2) cover in battery cluster (1), glued membrane (2) include back glued membrane (21), follow photovoltaic module's thickness direction, backplate (3) back glued membrane (21) with battery cluster (1) is range upon range of the setting in proper order, back glued membrane (21) correspond the part at least stack region (12) and be provided with bellying (211), bellying (211) are located back glued membrane (21) orientation one side surface of backplate (3).
2. Photovoltaic module according to claim 1, characterized in that the grammage of the raised portion (211) is 10g/m 2 ～20g/m 2 。
3. The photovoltaic module according to claim 1, characterized in that the width of the raised portion (211) is K, the width of the overlapping area (12) is W, and 3 W.ltoreq.K.ltoreq.5W.
4. The photovoltaic module according to claim 1, characterized in that the width of the raised portion (211) is K, K being 0.3mm ≦ K ≦ 2.5 mm.
5. The photovoltaic module according to claim 1, wherein the cell string (1) has a non-stacking region (13), the back adhesive film (21) includes a connection portion (212) and a covering portion (213), the protrusion portion (211) is formed on the connection portion (212), the connection portion (212) covers the stacking region (12), the covering portion (213) covers the non-stacking region (13), and a grammage of the covering portion (213) is 200g/m 2 ～300g/m 2 。
6. The photovoltaic module according to claim 1, wherein the cross-sectional shape of the protrusion (211) is a semicircle, a rectangle, or a trapezoid in the thickness direction of the back adhesive film (21).
7. The photovoltaic module according to claim 1, wherein the cell string (1) has a plurality of the stacking regions (12), the back adhesive film (21) is provided with a plurality of the protrusions (211), and the protrusions (211) correspond to the stacking regions (12) one by one.
8. The photovoltaic module according to claim 1, characterized in that said superimposition area (12) comprises at least a first superimposition area (121), a second superimposition area (122) and a third superimposition area (123), said second superimposition area (122) being located between said first superimposition area (121) and said third superimposition area (123);
the back glue film (21) comprises a first connecting portion (212a) and a second connecting portion (212b), the protruding portion (211) comprises a first protruding portion (211a) and a second protruding portion (211b) which are arranged adjacently, the first protruding portion (211a) is formed on the first connecting portion (212a), the second protruding portion (211b) is formed on the second connecting portion (212b), the first connecting portion (212a) covers the first stacking area (121), and the second connecting portion (212b) covers the third stacking area (123).
9. The photovoltaic module according to any one of claims 1 to 8, wherein the back adhesive film (21) has a first side edge (214) and a second side edge (215) which are oppositely arranged in a width direction thereof, and the convex portion (211) extends from the first side edge (214) to the second side edge (215).
10. The photovoltaic module according to any one of claims 1 to 8, 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 spacing region (14) is formed between the adjacent cell strings (1), and the protrusions (211) are disconnected in the string spacing region (14) along the width direction of the back adhesive film (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221143489.4U CN217280804U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221143489.4U CN217280804U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280804U true CN217280804U (en) | 2022-08-23 |
Family
ID=82883339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221143489.4U Active CN217280804U (en) | 2022-05-12 | 2022-05-12 | Photovoltaic module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217280804U (en) |
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2022
- 2022-05-12 CN CN202221143489.4U patent/CN217280804U/en active Active
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