CN221709758U - Photovoltaic module - Google Patents

Abstract

The embodiment of the application relates to a photovoltaic module, which comprises: a laminate having opposed first and second surfaces; the frame structure comprises a frame main body and a blocking part; the frame main body comprises a bearing part positioned at the top, and the top surface of the bearing part faces the first surface; the blocking part is positioned on the top surface of the bearing part, the blocking part is in an inverted L shape, one end of the blocking part is connected with one end of the bearing part, the other end of the blocking part is close to the laminated piece, the top surface of the blocking part is higher than the second surface, and the orthographic projection of the blocking part on the top surface of the bearing part is tangent to or separated from the orthographic projection of the laminated piece on the top surface of the bearing part. At least, the cost of the photovoltaic module is reduced, and the photoelectric conversion efficiency of the photovoltaic module is improved.

Description

Photovoltaic module

Technical Field

The embodiment of the application relates to the technical field of solar cells, in particular to a photovoltaic module.

Background

The fossil energy has the advantages of air pollution and limited reserves, and solar energy has the advantages of cleanness, no pollution, abundant resources and the like, so the solar energy is gradually becoming a core clean energy for replacing the fossil energy, and the solar cell becomes the development center of gravity for the utilization of the clean energy due to the good photoelectric conversion efficiency of the solar cell.

In order to facilitate installation and reduce the probability of damage to the solar cell during use, current photovoltaic modules are typically composed of a laminate comprising the cell structure and a photovoltaic bezel surrounding the edges of the laminate, the photovoltaic bezel typically comprising two long-sided and two short-sided bezel assemblies, the bezel assemblies typically being composed of a bezel body and a blocking portion surrounding the bezel body with a limiting groove. However, in the use process, the actual photoelectric conversion efficiency and the expected photoelectric conversion efficiency of the current photovoltaic module still have a large gap.

Disclosure of utility model

The embodiment of the application provides a photovoltaic module, which is at least beneficial to reducing the cleaning and maintenance difficulty of the photovoltaic module and improving the photoelectric conversion efficiency of the photovoltaic module.

The embodiment of the application provides a photovoltaic module, which comprises: a laminate having opposed first and second surfaces; the frame structure comprises a frame main body and a blocking part; the frame main body comprises a bearing part positioned at the top, and the top surface of the bearing part faces the first surface; the blocking part is positioned on the top surface of the bearing part, the blocking part is in an inverted L shape, one end of the blocking part is connected with one end of the bearing part, the other end of the blocking part is close to the laminated piece, the top surface of the blocking part is higher than the second surface, and the orthographic projection of the blocking part on the top surface of the bearing part is tangent to or separated from the orthographic projection of the laminated piece on the top surface of the bearing part.

In some embodiments, the ratio between the spacing between the top surface of the barrier and the second surface and the thickness of the laminate in a direction perpendicular to the second surface is 0.02 to 0.125.

In some embodiments, the spacing between the top surface of the barrier and the second surface in a direction perpendicular to the second surface is 0.1mm to 0.5mm.

In some embodiments, the laminate comprises a battery structure having a creepage distance of 8mm to 12mm in a direction perpendicular to a side of the barrier toward the laminate.

In some embodiments, the blocking portion includes a first portion having one end connected to one end of the bearing portion and the other end connected to one end of the second portion, the other end of the second portion being remote from the first portion, the first portion having a first glue overflow groove toward a side of the laminate, the first glue overflow groove being recessed inward of the first portion.

In some embodiments, the second portion has a stepped structure on a surface facing the load bearing portion.

In some embodiments, the step structure comprises a plurality of steps, the spacing between the surface of the step facing the load bearing portion and the top surface of the second portion increasing progressively as the spacing of the step from the laminate decreases in a first direction perpendicular to the sides of the bezel body and facing the laminate, in a direction perpendicular to the top surface of the second portion.

In some embodiments, the top surface of the carrier includes a first region in contact with the laminate and a second region adjacent to the first region and not in contact with the barrier, the first region lying in a plane that is between 0 degrees and 5 degrees from the plane of the second region.

In some embodiments, the frame body further includes a protrusion, one end of the protrusion is connected to a side of the frame body directly below the laminate, and the other end of the protrusion is far away from the frame body and is bent to form a second glue overflow groove with an opening facing the laminate.

In some embodiments, the protrusions are spaced from the first surface of the laminate toward the top surface of the laminate.

In some embodiments, the bezel body further includes an extension portion having one end in contact with a side of the bearing portion directly under the laminate and the other end remote from the bearing portion in a direction perpendicular to the side of the bearing portion directly under the laminate.

In some embodiments, the extension further includes a third glue overflow channel extending from a top surface of the extension toward an interior of the extension.

In some embodiments, the carrier portion and the extension portion are of an integrally formed structure.

The technical scheme provided by the embodiment of the application has at least the following advantages:

In the photovoltaic module provided by the embodiment of the application, the laminated piece is provided with the first surface and the second surface which are opposite, at least one frame structure of the photovoltaic module is composed of the frame main body and the blocking part, the top of the frame main body is the bearing part, the top surface of the bearing part faces the first surface of the laminated piece, the blocking part is in an inverted L shape, one end of the blocking part is connected with one end of the bearing part, the other end of the blocking part is close to the laminated piece, and the orthographic projection of the blocking part on the top surface of the bearing part is tangent to or separated from the orthographic projection of the laminated piece on the top surface of the bearing part, and because the orthographic projections of the laminated piece and the blocking part on the top surface of the bearing part are not overlapped, the blocking part and the bearing part are equivalent to enclose an open limiting groove, so that the blocking part can prevent the light shielding of the laminated piece, and the photovoltaic module can exert the photoelectric conversion performance of the photovoltaic module to the greatest extent; the top surface of the blocking part is higher than the second surface of the laminated piece, that is to say, the top surface of the blocking part is higher than the top surface of the laminated piece, the side surface of the laminated piece facing the blocking part is the integral surface which is used as the combination of the laminated piece and the photovoltaic frame, the combination strength of the photovoltaic frame and the laminated piece is improved, the side surface of the laminated piece is exposed in the air, the ageing speed of the laminated piece is reduced, and the influence of the ageing of the laminated piece on the photoelectric conversion efficiency of the photovoltaic module is reduced.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, which are not to be construed as limiting the embodiments unless specifically indicated otherwise.

FIG. 1 is a schematic cross-sectional view of a frame structure according to an embodiment of the present application;

FIG. 2 is a partial cross-sectional view of a photovoltaic module according to one embodiment of the present application;

FIG. 3 is a partial cross-sectional view of another photovoltaic module according to an embodiment of the present application;

FIG. 4 is a perspective view of a laminate provided in accordance with one embodiment of the present application;

FIG. 5 is a partial cross-sectional view of yet another photovoltaic module according to an embodiment of the present application;

FIG. 6 is a partial cross-sectional view of yet another photovoltaic module according to an embodiment of the present application;

fig. 7 is a partial cross-sectional view of yet another photovoltaic module according to an embodiment of the present application.

Detailed Description

As known from the background art, the actual photoelectric conversion efficiency of the current photovoltaic module needs to be improved.

In some embodiments, referring to fig. 1, fig. 1 is a schematic cross-sectional view of a bezel structure. The current photovoltaic module frame structure comprises a frame main body 101 and a blocking portion 102, wherein the frame main body 101 and the blocking portion 102 extend along the length direction of the frame structure, and a schematic diagram of a cross section structure of the frame structure along the width and height directions is shown in fig. 1. The frame body 101 includes a bearing portion 111 at the top, a supporting portion 112 at the bottom, and a vertical portion 113 communicating the top and the bottom, and the bearing portion 111, the supporting portion 112, and the vertical portion 113 enclose a receiving cavity 114. The blocking portion 102 includes a first portion 121 and a second portion 122, one end of the first portion 121 is connected with one end of the bearing portion 111, the other end is connected with the second portion 122, the other end of the second portion 122 is far away from the first portion 121, the blocking portion 102 is located right above the bearing portion 111, and a glue overflow groove 123 is formed in one side, facing the second portion 122, of the first portion 121. The support 112 is also provided with mounting holes 115.

The barrier 102 and the carrier 111 form a semi-closed cavity of the carrier laminate, the top surface of the carrier 111, the side of the first part 121 facing the laminate and the bottom surface of the second part 122 facing the carrier 111 may be seen as three side walls of the semi-closed cavity for positioning and securing the laminate. The semi-closed cavity is formed to position and fix the laminated piece, so that the sealing performance and reliability of the photovoltaic frame are improved. The accommodating cavity 114 in the frame main body 101 is convenient for connecting two adjacent frame structures by adopting the corner bracket structure, so that the convenience of installing the photovoltaic frame is improved. The mounting hole 115 is used to cooperate with a frame fixing holder to fix the frame structure of the photovoltaic module to the designated holder, thereby effectively fixing the frame structure of the photovoltaic module.

The application provides a photovoltaic module, wherein a laminated piece is provided with a first surface and a second surface which are opposite, at least one frame structure of the photovoltaic module is composed of a frame main body and a blocking part, the top of the frame main body is a bearing part, the top surface of the bearing part faces the first surface of the laminated piece, the blocking part is in an inverted L shape, one end of the blocking part is connected with one end of the bearing part, the other end of the blocking part is close to the laminated piece, the orthographic projection of the blocking part on the top surface of the bearing part is tangential to or separated from the orthographic projection of the laminated piece on the top surface of the bearing part, and because the orthographic projections of the laminated piece and the blocking part on the top surface of the bearing part are not overlapped, the blocking part and the bearing part are enclosed into an open limiting groove, so that the blocking part can prevent the light shielding of the laminated piece, and the photovoltaic module can exert the photoelectric conversion performance of the photovoltaic module to the greatest extent; the top surface of the blocking part is higher than the second surface of the laminated piece, that is to say, the top surface of the blocking part is higher than the top surface of the laminated piece, the side surface of the laminated piece facing the blocking part is the integral surface which is used as the combination of the laminated piece and the photovoltaic frame, the combination strength of the photovoltaic frame and the laminated piece is improved, the side surface of the laminated piece is exposed in the air, the ageing speed of the laminated piece is reduced, and the influence of the ageing of the laminated piece on the photoelectric conversion efficiency of the photovoltaic module is reduced.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those of ordinary skill in the art that in various embodiments of the present application, numerous specific details are set forth in order to provide a thorough understanding of the present application. The claimed application may be practiced without these specific details and with various changes and modifications based on the following embodiments.

An embodiment of the present application provides a photovoltaic module, referring to fig. 2, fig. 2 is a partial cross-sectional view of the photovoltaic module, showing a schematic cross-sectional view of a laminate and a frame assembly in a plane formed by a width direction and a height direction of the frame assembly.

The photovoltaic module includes: a laminate 201, the laminate 201 having opposing first and second surfaces 211, 212; the frame structure 202, the frame structure 202 includes a frame body 221 and a blocking portion 222, the frame body 221 includes a bearing portion 223 located at the top, and a top surface of the bearing portion 223 faces the first surface 211 of the laminate 201; the blocking portion 222 is located on the top surface of the carrying portion 223, the blocking portion 222 is in an inverted L shape, one end of the blocking portion 222 is connected with one end of the carrying portion 223, the other end of the blocking portion is close to the laminated piece 201, the top surface of the blocking portion 222 is higher than the second surface 212, and the orthographic projection of the blocking portion 222 on the top surface of the carrying portion 223 is tangential to or separated from the orthographic projection of the laminated piece 201 on the top surface of the carrying portion 223.

In addition, for ease of understanding, in the embodiment of the present application, the blocking portion 222 is in an approximately standard inverted L shape, the long side of the inverted L-shaped blocking portion 222 extends in a direction perpendicular to the top surface of the carrying portion 223, the short side extends in a direction parallel to the top surface of the carrying portion 223, and the blocking portion 222 is located directly above the carrying portion 223 as an example. In a specific application, the blocking portion 222 may be in a non-standard inverted L shape, the extending direction of the long side of the blocking portion 222 may be any direction with an included angle smaller than or equal to 45 degrees with the normal line of the top surface of the carrying portion 223, the extending direction of the second portion 225 may be any direction with an included angle smaller than or equal to 30 degrees with the top surface of the carrying portion 223, and the blocking portion 222 may also be partially located directly above the carrying portion 223, that is, the orthographic projection portion of the blocking portion 222 on the plane where the top surface of the carrying portion 223 is located in the top surface of the carrying portion 223.

In the frame structure 202 of the photovoltaic module, the top surface of the bearing part 223 faces the first surface 211 of the laminate 201, one end of the inverted-L-shaped blocking part 222 is connected with one end of the bearing part 223, the other end is close to the laminate 201, and the orthographic projection of the blocking part 222 on the top surface of the bearing part 223 is tangential to or separated from the orthographic projection of the laminate 201 on the top surface of the bearing part 223, which is equivalent to forming an open limit groove with the bearing part 223 through the blocking part 222, so that after the laminate 201 is arranged in the limit groove, the blocking part 222 does not have a part positioned right above the laminate 201, thereby reducing the light shielding of the blocking part 222 on the laminate 201 as much as possible, and enabling the photoelectric conversion performance of the laminate 201 to be fully exerted; through being higher than the second surface 212 with the top surface setting of blocking portion 222 for laminate 201 is towards the complete surface that combines as laminate 201 and photovoltaic frame of the side of blocking portion 222, is favorable to promoting the bonding strength of photovoltaic frame and laminate 201, has reduced the area that laminate 201 exposes in the air simultaneously, is showing the ageing speed that reduces laminate 201, reduces the parasitic light absorption that laminate 201 ageing brought and influences photovoltaic module photoelectric conversion efficiency, promotes photovoltaic module's actual photoelectric conversion efficiency.

It should be understood that the top surface of the bearing portion 223 facing the laminate 201 and the side surface of the blocking portion 222 facing the laminate 201 are both side walls of the limiting groove of the laminate 201, and an adhesive film with a certain fluidity is generally disposed between the frame structure 202 and the laminate 201 for improving the sealing performance and the connection reliability. In the case where there is no adhesive film on the side of the barrier 222 facing the laminate 201, the side of the barrier 222 facing the laminate 201 would be in direct contact with the side of the laminate 201, in which case the orthographic projection of the barrier 222 on the top surface of the carrier 223 is tangential to the orthographic projection of the laminate 201 on the top surface of the carrier 223. In the case where there is a film on the side of the barrier 222 facing the laminate 201, the side of the barrier 222 facing the laminate 201 may indirectly contact the side of the laminate 201 through the film, in which case the orthographic projection of the barrier 222 on the top surface of the carrier 223 is separated from the orthographic projection of the laminate 201 on the top surface of the carrier 223.

In addition, the specific structure of the bezel body 221 may refer to the bezel body 101 mentioned above, and the embodiments of the present application will not be described herein again.

Referring to fig. 3, fig. 3 is a partial cross-sectional view of another photovoltaic module, in some embodiments, the blocking portion 222 includes a first portion 224 and a second portion 225, one end of the first portion 224 is connected to one end of the carrying portion 223, the other end is connected to the second portion 225, the other end of the second portion 225 is far from the first portion 224, a side of the first portion 224 facing the laminate 201 has a first glue overflow groove 241, and the first glue overflow groove 241 is recessed inward of the first portion 224.

The blocking portion 222 may be formed of a first portion 224 for positioning a main body portion of the blocking portion 222, and a second portion 225 for clamping and fixing the laminate 201 in a direction approaching the laminate 201, and the first portion 224 and the second portion 225 may be integrally formed or spliced, and the first portion 224 and the second portion 225 are mainly divided for easy understanding.

In order to avoid mechanical damage or destruction of the laminate 201 during lamination and to improve the tightness of the photovoltaic module, the photovoltaic frame and the laminate 201 are usually connected by a film having a certain fluidity after melting, and the photovoltaic frame and the laminate 201 are in indirect contact by the film having an adhesive and buffering effect. In the process of bonding the laminate 201 and the photovoltaic frame by the adhesive film, the adhesive film has certain fluidity, so that the edge of the photovoltaic frame is easy to overflow, and light shielding is caused to a certain extent for the solar cell in the laminate 201.

Accordingly, a first glue overflow groove 241 may be provided at a side of the first portion 224 facing the laminate 201, the first glue overflow groove 241 being provided on a surface of the first portion 224 facing the laminate 201 and recessed from the surface of the first portion 224 into the first portion 224. After the adhesive film is provided by way of gluing or laying the adhesive film, the melted adhesive film in the lamination process can flow along the surface of the first portion 224 and/or the surface of the first glue overflow groove 241 to the inside of the first glue overflow groove 241, so that the amount of the adhesive film flowing along the surface of the second portion 225 onto the top surface of the laminate 201 is reduced as much as possible, and light shielding caused by glue overflow on the top surface of the laminate 201 is avoided.

In addition, the first glue overflow groove 241 may be recessed inward along a direction perpendicular to the first portion 224 and facing the side surface of the laminate 201, so as to have a larger glue film capacity, or may be recessed inward along a direction close to the second portion 225, so as to form a glue overflow groove morphology of which the top surface faces the inner buckle of the bearing portion 223 shown in fig. 3, thereby improving the glue overflow capacity of the first glue overflow groove 241, and being beneficial to reducing the volume of the first glue overflow groove 241, so as to improve the overall mechanical strength of the blocking portion 222.

In some embodiments, the ratio between the spacing between the top surface of the barrier 222 and the second surface 212 and the thickness of the laminate 201 in a direction perpendicular to the second surface 212 is 0.02 to 0.125.

Referring to the description and analysis above regarding the blocking portion 222, for ease of understanding, the blocking portion 222 of the inverted-L shape may be regarded as being constituted by the first portion 224 and the second portion 225, the thickness of the laminate 201 in the direction perpendicular to the second surface 212 referring to the average interval h1 between the first surface 211 and the second surface 212 of the laminate 201, and the interval between the top surface of the blocking portion 222 and the second surface 212 may be regarded as the average interval h2 between the top surface of the second portion 225 remote from the carrying portion 223 and the second surface 212.

With reference to the above analysis and description, one of the main functions of the blocking portion 222 is to form a limiting groove of the laminate 201 together with the bearing portion 223, to fix the laminate 201, and meanwhile, since the top surface of the blocking portion 222 is higher than the second surface 212, i.e. the top surface of the second portion 225 is higher than the second surface 212, after the laminate 201 and the frame structure 202 are adhered by the adhesive film, the side surface of the laminate 201 can be completely covered by the adhesive film between the blocking portion 222 and the laminate 201, thereby effectively improving the tightness of the laminate 201, reducing the exposed area of the laminate 201 in the air, and thus slowing down the aging of the laminate 201.

Meanwhile, since the incident light on the second surface 212 of the laminate 201 is not incident in the direction perpendicular to the second surface 212, in the case that the incident direction of the incident light forms an angle smaller than 90 degrees with the second surface 212, the blocking portion 222 with a top surface higher than the top surface of the laminate 201 will block the incident light to some extent, and the greater the height difference between the top surface of the blocking portion 222 and the top surface of the laminate 201, the more obvious the blocking effect. During the dust removal process of the surface of the laminate 201 by cleaning or rain washing, the laminate 201 may obstruct part of the water flow from being discharged along the edge of the frame structure 202, so that a certain dust deposit occurs on the edge of the laminate 201, and thus secondary shielding is caused to the incident light.

Thus, the spacing between the top surface of the barrier 222 and the second surface 212, i.e. the ratio between the spacing between the top surface of the second portion 225 remote from the carrier 223 and the second surface 212 and the thickness of the laminate 201, in a direction perpendicular to the second surface 212, may be set in the range of 0.02 to 0.125, e.g. 0.025, 0.04, 0.05, 0.075, 0.1 or 0.12, etc. By setting the ratio of the interval between the top surface of the blocking portion 222 and the second surface 212 to the thickness of the laminated member 201 within a proper range, the laminated member 201 is ensured to have a good fixing effect towards the side surface of the blocking portion 222 and to be completely sealed, the reliability of the photovoltaic module is improved, the influence of parasitic light absorption caused by aging of the laminated member 201 on the actual photoelectric conversion efficiency is reduced, the light shielding of the blocking portion 222 on the laminated member 201 and the interference on the dust removal effect in the dust removal process are effectively controlled, the area of the dust accumulation area at the edge of the laminated member 201 is reduced as much as possible, and the average value of the actual photoelectric conversion efficiency in the use process of the photovoltaic module is improved.

In some embodiments, the spacing between the top surface of the barrier 222 and the second surface 212 is 0.1mm to 0.5mm in a direction perpendicular to the second surface 212.

Referring to the description and analysis above of the ratio of the spacing between the top surface of the barrier 222 and the second surface 212 to the thickness of the laminate 201, the top surface of the barrier 222 needs to be sufficiently higher than the top surface of the laminate 201 in the direction perpendicular to the second surface 212 to ensure that the adhesive film completely covers the sides of the laminate 201 facing the barrier 222. The thickness of the laminate 201 itself is typically in the range of 4mm to 5mm, for example, 4.1mm, 4.2mm, 4.4mm, 4.75mm, 4.9mm, etc., for sealing effect and size of the solar cell.

Accordingly, in performing the disposing of the blocking portion 222, the interval between the top surface of the blocking portion 222 and the second surface 212 in the second direction may be disposed in a range of 0.1mm to 0.5mm, for example, 0.125mm, 0.15mm, 0.175mm, 0.225mm, 0.3mm, 0.4mm, or 0.45mm, etc. The side surface of the lamination piece 201 facing the blocking portion 222 can be completely covered by the adhesive film, the sealing performance and the ageing resistance of the lamination piece 201 are improved, the influence of parasitic light absorption caused by ageing of the lamination piece 201 on the actual photoelectric conversion efficiency is reduced, the blocking portion 222 is effectively controlled to shield light of the lamination piece 201, and the average value of the actual photoelectric conversion efficiency in the use process of the photovoltaic module is improved.

Referring to fig. 2 and 4 in combination, fig. 4 is a top view of a photovoltaic module. In some embodiments, laminate 201 includes cell structures 213, where cell structures 213 creepage distance is 8mm to 12mm in a direction perpendicular to a side of barrier 222 that faces laminate 201.

The creepage distance of the cell structure 213 in a direction perpendicular to the side of the barrier 222 towards the laminate 201 refers to the average spacing w between the edge of the cell structure 213 and the adjacent edge of the laminate 201. In order to ensure the safety of the battery structure 213, the edge of the battery structure 213 is usually spaced from the edge of the laminate 201, and in the case where the creepage distance of the battery structure 213 is too large, the ratio of the area of the orthographic projection of the battery structure 213 on the second surface 212 to the area of the second surface 212 is too small, more incident light is not utilized by the battery structure 213, and the average power density and the photoelectric conversion efficiency of the laminate 201 are low. In the case where the creepage distance is too small, since the blocking portion 222 inevitably has some light shielding to the laminate 201, a portion of the cell structure 213 that is shielded from light by the blocking portion 222 may occur, thereby affecting the photoelectric conversion efficiency of the laminate 201.

Accordingly, in the direction perpendicular to the side of the barrier 222 toward the laminate 201, the creepage distance of the battery structure 213 may be set in the range of 8mm to 12mm, for example, 8.5mm, 9mm, 9.5mm, 10mm, 11mm, 11.5mm, or the like. Therefore, the light shielding of the lamination 201 by the dust accumulation on the edge of the lamination 201 caused by the blocking part 222 is provided, and the influence of the light shielding of the blocking part 222 on the lamination 201 on the photoelectric conversion efficiency of the battery structure 213 is as small as possible or even negligible, so that the combination effect of the lamination 201 and the frame structure 202 is ensured, and the actual photoelectric conversion efficiency of the battery structure 213 is improved.

Referring to fig. 5, fig. 5 is a partial cross-sectional view of a photovoltaic module. In some embodiments, the second portion 225 has a stepped structure 250 on a surface facing the carrier portion 223.

The second portion 225 functions to fix the laminate 201 on the one hand, and on the other hand, since the second portion 225 is distant from the first portion 224 in a direction approaching the laminate 201, a surface of the second portion 225 facing the carrying portion 223, a surface of the first portion 224 facing the laminate 201, and a portion of the top surface of the carrying portion 223 facing the second portion 225 correspond to define a glue overflow groove. In the case that the first portion 224 has the first glue overflow groove 241 on the side facing the laminate 201, the surface of the first portion 224 facing the laminate 201, the surface of the second portion 225 facing the carrying portion 223, and the top surface of the carrying portion 223 facing the second portion 225 are the glue overflow grooves forming an enlarged version, and the surface of the second portion 225 facing the carrying portion 223 can be regarded as the top surface of the glue overflow groove.

In the case that the surface of the second portion 225 facing the carrying portion 223 is a smooth surface, which is equivalent to the smooth surface of the adhesive overflow groove, the adhesive overflow groove has weak restriction capability on the adhesive film flowing along the top surface of the adhesive overflow groove, and may not effectively restrict the adhesive film from overflowing along the surface of the blocking portion 222 to the top surface of the laminate 201. Therefore, the step structure 250 may be disposed on at least a partial area of the surface of the second portion 225 facing the carrying portion 223, the surface of the second portion 225 facing the carrying portion 223 is made to be a concave-convex surface or a partially smooth surface by using the step structure 250, and the step structure 250 may be used as a blocking structure on the top surface of the glue overflow groove to limit the movement of the glue film along the top surface of the glue overflow groove, thereby effectively increasing the limiting capability of the glue overflow groove on the glue film flowing along the top surface of the glue overflow groove, and reducing the probability of glue overflow on the top surface of the laminate 201.

In fig. 5, the surface of the second portion 225 facing the carrying portion 223 is illustrated as having a stepped structure, and in a specific application, the surface of the second portion 225 facing the carrying portion 223 may have a stepped structure on the front surface, which is not limited by the embodiment of the present application.

In addition, as shown in fig. 5, in order to further improve the limiting capability of the glue overflow groove on the glue overflow, the thickness of the second portion 225 along the direction perpendicular to the top surface of the second portion 225 may be set to be gradually increased along the direction close to the laminate 201, so that the top surface of the glue overflow groove is in a state of being buckled inwards towards the inside of the blocking portion 222, and the difficulty of overflowing the glue film along the top surface of the glue overflow groove is further increased.

In some embodiments, the step structure 250 comprises a multi-step, in a direction perpendicular to the top surface of the second portion 225, the spacing between the surface of the step facing the carrier 223 and the top surface of the second portion 225 gradually increases as the spacing of the step from the laminate 201 decreases in a first direction that is lateral to the bezel body 221 and faces the laminate 201.

The stepped structure 250 includes a plurality of steps, each step including a step face facing the top surface of the carrying portion 223 and a side face facing the first portion 224, and a space between the surface of the step facing the carrying portion 223 and the top surface of the second portion 225 in a direction perpendicular to the top surface of the second portion 225 refers to an average space h3 between the step face and the top surface of the second portion 225. In the process of setting the step structure 250, if the interval between the step surface of each step and the top surface of the second portion 225 along the direction of the second portion 225 approaching the laminate 201 is gradually reduced in the direction of the second portion 225 approaching the laminate 201, the step structure 250 is gradually downward trend along the direction of the second portion 225 approaching the laminate 201, the blocking of the adhesive film by the step structure 250 mainly depends on the side surface of the first step farthest from the laminate 201, and the adhesive overflow limiting capability of the step structure 250 has a greatly improved space.

Therefore, in the direction along the second portion 225 approaching the laminate 201, or in the direction perpendicular to the side surface of the frame main body 221 and facing the laminate 201, the spacing between the step surface of each step and the top surface of the second portion 225 along the direction perpendicular to the top surface of the second portion 225 may be set to be gradually increased, so that the step structure 250 is in a gradual upward trend along the direction along the second portion 225 approaching the laminate 201, or in the direction perpendicular to the side surface of the frame main body 221 and facing the laminate 201, so that the side surface of each step in the step structure 250 can limit the glue overflow, and the surface of the second portion 225 facing the bearing portion 223 is in an inner buckle state as much as possible, thereby significantly improving the limit capability of the step structure 250 on the glue overflow, further reducing the glue overflow on the surface of the laminate 201, and improving the aesthetic property and the photoelectric conversion efficiency of the photovoltaic module.

In some embodiments, the top surface of the carrier 223 includes a first region 231 contacting the laminate 201, and a second region 232 adjacent to the first region 231 and not contacting the barrier 222, wherein the angle between the plane of the first region 231 and the plane of the second region 232 is 0 to 5 degrees.

Referring to the above description and analysis for the glue overflow groove formed by the second portion 225, the first portion 224 and the carrying portion 223, the three are equivalent to forming a glue overflow groove by using the surface of the three as the side wall of the glue overflow groove in different directions, and the purpose of the glue overflow groove is to reduce the problem that the top surface of the laminate 201 is shielded by the light caused by the glue overflow. In the top surface of the carrier 223, the portion serving as the surface of the glue overflow groove may be regarded as the second area 232, and in the case that the plane of the first area 231 and the plane of the second area 232 are the same, the glue film on the top surface of the carrier 223 flows into the glue overflow groove along the smooth plane, so that the glue film in the glue overflow groove can reach the maximum capacity relatively easily and the glue overflow occurs. In the case where the plane in which the first region 231 is located and the plane in which the second region 232 is located are different planes, an angle between the plane in which the second region 232 is located and the plane in which the first region 231 is located may be characterized by an angle α.

Taking the plane of the first area 231 as a horizontal plane as an example, if the plane of the second area 232 is in an ascending trend along a direction perpendicular to the direction of the blocking portion 222 facing the side surface of the laminate 201, the glue overflow groove has a larger glue film capacity, and the glue film on the carrying portion 223 will preferentially flow to the bottom of the glue overflow groove on the carrying portion 223. However, in the case where the angle between the plane of the first region 231 and the plane of the second region 232 is too large, the flatness of the carrying portion 223 is too low, and the portion where the bending occurs is prone to be subjected to stress problems.

Therefore, in the process of disposing the carrying portion 223, the plane in which the first region 231 is located and the plane in which the second region 232 is located may be set to different planes, the plane in which the second region 232 is located is in an ascending trend in a direction perpendicular to the side face of the barrier portion 222 toward the laminate 201, and an included angle between the plane in which the first region 231 is located and the plane in which the second region 232 is located is set to be in a range of 0 degrees to 5 degrees, for example, 1 degrees, 1.5 degrees, 2 degrees, 3 degrees, 4.5 degrees, or the like. By setting the angle between the plane in which the first region 231 is located and the plane in which the second region 232 is located within a suitable range, the probability of glue overflow on the top surface of the laminate 201 is further reduced, while the mechanical strength of the carrying portion 223 is ensured.

The plane in which the first region 231 is located is taken as a horizontal plane in the embodiment of the present application as an example, and in a specific application, the plane in which the first region 231 is located may be other planes having a certain included angle with the horizontal plane, which is not limited in the embodiment of the present application.

Referring to fig. 2 and 6 in combination, fig. 6 is a partial cross-sectional view of a photovoltaic module. In some embodiments, the bezel body 221 further includes a protrusion 226, one end of the protrusion 226 is connected to a side of the bezel body 221 directly below the laminate 201, and the other end is far from the bezel body 221 and bent to form a second glue overflow groove 261 opening toward the laminate 201.

The photovoltaic frame is mainly in indirect contact with the laminate 201 via an adhesive film having an adhesive effect, and therefore the bonding strength between the photovoltaic frame and the laminate 201 is related to the contact area between the frame structure 202 and the laminate 201. In order to reduce the shielding effect of the frame structure 202 on the laminate 201, the width of the carrying portion 223 and the height of the blocking portion 222 of the frame structure 202 are generally smaller, so that the contact area between the frame structure 202 and the laminate 201 is limited.

Based on this, in the process of setting the frame structure 202, the protruding portion 226 may be further disposed on the frame main body 221, where one end of the protruding portion 226 is connected to the side surface of the frame main body 221 directly below the laminate 201, and the other end is far away from the frame main body 221 and is bent to form the second glue overflow groove 261 with an opening facing the laminate 201. After setting up second overflow glue groove 261, can be in second overflow glue groove 261 through mode such as gluing prefilled a certain amount of glued membrane, in lamination in-process, glued membrane between lamination 201 and the carrier 223 can flow to second overflow glue groove 261 to make the glued membrane in the second overflow glue groove 261 can overflow and contact with lamination 201 first surface 211, and then make photovoltaic module lamination 201 and frame structure 202 directly show the promotion through the area of glued membrane bonding region, thereby promote the bonding strength between improvement photovoltaic frame and the lamination 201.

Meanwhile, due to the arrangement of the second glue overflow groove 261, part of the glue film between the bearing part 223 and the lamination piece 201 can flow into the second glue overflow groove 261 to fill a gap between the second glue overflow groove 261 and the lamination piece 201, so that the glue film capacity pressure of the glue overflow groove surrounded by the blocking part 222 and the bearing part 223 is reduced, and the probability of glue overflow on the top surface of the lamination piece 201 is further reduced.

In some embodiments, the raised portions 226 are spaced from the first surface 211 of the laminate 201 toward the top surface of the laminate 201.

Referring to the above description and analysis of the protruding portion 226, the protruding portion 226 has a main function of forming the second glue overflow groove 261, thereby improving the bonding strength between the laminate 201 and the frame structure 202 and reducing the probability of glue overflow on the top surface of the laminate 201. The mechanism by which the second glue overflow groove 261 can improve the bonding strength between the laminate 201 and the bezel structure 202 is that the glue film between the carrier 223 and the laminate 201 flows into the second glue overflow groove 261 so that the glue film in the second glue overflow groove 261 overflows and adheres to the laminate 201.

Since the flowability of the adhesive film is limited, the protruding portion 226 can be arranged towards the top surface of the laminate 201 in a manner spaced from the first surface 211 of the laminate 201, so that, on one hand, whether the adhesive film in the second adhesive overflow groove 261 is in contact with the laminate 201 is convenient to observe, and on the other hand, the excessive adhesive film in the second adhesive overflow groove 261 can be extruded through the gap between the protruding portion 226 and the laminate 201, so that the first adhesive overflow groove 241 on the blocking portion 222 is prevented from having larger adhesive film capacity pressure, and the probability of adhesive overflow on the top surface of the laminate 201 is reduced.

In addition, since the top surface of the protrusion 226 is spaced apart from the first surface 211, part of the light may be incident on the first surface 211 of the laminate 201 along the adhesive film between the protrusion 226 and the laminate 201, thereby reducing light shielding of the back surface of the laminate 201 by the protrusion 226.

Referring to fig. 2 and 7 in combination, in some embodiments, the bezel body 221 further includes an extension 227, one end of the extension 227 is in contact with a side of the carrying portion 223 directly under the laminate 201, the other end is away from the carrying portion 223 in a direction perpendicular to the side of the carrying portion 223 directly under the laminate 201, and a top surface of the extension 227 faces the first surface 211.

The photovoltaic frame is mainly in indirect contact with the laminate 201 via an adhesive film having an adhesive effect, and therefore the bonding strength between the photovoltaic frame and the laminate 201 is related to the contact area between the frame structure 202 and the laminate 201. Since the first surface 211 of the laminate 201 is located at the back of the photovoltaic module after the photovoltaic module is mounted, the incident light of the first surface 211 has a small influence on the overall photoelectric conversion efficiency of the laminate 201, and therefore, the bonding strength of the photovoltaic frame and the laminate 201 can be improved by improving the bonding area between the photovoltaic frame and the first surface 211 of the laminate 201.

In the process of disposing the bezel structure 202, an extension portion 227 may be disposed on the bezel body 221, one end of the extension portion 227 is in contact with a side surface of the bearing portion 223 directly under the laminate 201, and the other end is away from the bearing portion 223 in a direction perpendicular to the side surface of the bearing portion 223 directly under the laminate 201. So that the laminated piece 201 can be respectively contacted with the top surface of the bearing part 223 facing the laminated piece 201 and the top surface of the extending part 227 facing the laminated piece 201 through the adhesive film, thereby remarkably improving the contact area and the bonding strength of the laminated piece 201 and the frame structure 202.

In some embodiments, the ratio of the width of the extension 227 to the width of the carrier 223 in a direction perpendicular to the side of the bezel body 221 is 0.25 to 1. If the width of the extension portion 227 is too small in the direction perpendicular to the side surface of the bezel main body 221, the bonding strength between the bezel structure 202 and the laminate 201 cannot be effectively improved, and if the width of the extension portion 227 is too large, the cost of the bezel structure 202 is greatly increased, and the light shielding of the extension portion 227 is too large, and the mechanical strength may be hidden.

Accordingly, the ratio of the width of the extension portion 227 to the width of the carrier portion 223 may be set in the range of 0.25 to 1, for example, 0.3, 0.35, 0.4, 0.5, 0.6, 0.7, 0.75, or 0.9, etc., in the direction perpendicular to the side surface of the bezel main body 221, to improve the bonding strength of the bezel structure 202 and the laminate 201, while securing the reliability of the photovoltaic module.

In some embodiments, the carrier 223 and the extension 227 are integrally formed. If the supporting portion 223 and the extending portion 227 are formed separately, an additional process for forming the extending portion 227 is required in the preparation process of the frame structure 202, and the bonding firmness between the extending portion 227 and the supporting portion 223 is limited. Therefore, the carrying portion 223 and the extending portion 227 are formed as an integrally formed structure, so that the manufacturing process of the frame structure 202 is reduced, and the reliability of the frame structure 202 is improved.

In some embodiments, the extension 227 further includes a third glue overflow groove 271, the third glue overflow groove 271 extending from the top surface of the extension 227 to the inside of the extension 227.

Referring to the description and analysis of the second glue overflow groove 261, in order to reduce the glue film capacity pressure of the glue overflow groove at the side of the blocking portion 222, a third glue overflow groove 271 extending from the top surface of the extending portion 227 to the inside of the extending portion 227 may be further disposed at the side of the extending portion 227 facing the laminate 201, so that part of the excessive glue film between the laminate 201 and the frame structure 202 may flow into the third glue overflow groove 271, the probability of glue overflow occurring at the top surface of the laminate 201 is reduced, and meanwhile, the contact area between the glue film between the laminate 201 and the frame structure 202 is increased, and further, the bonding strength between the laminate 201 and the frame structure 202 is increased.

In some embodiments, the width of the top surface of the third glue overflow groove 271 is smaller than the maximum width of the third glue overflow groove 271 in a direction perpendicular to the side surface of the bezel body 221. That is, the top opening of the third glue overflow groove 271 is in an adduction state, so that the third glue overflow groove 271 has a strong glue overflow inhibiting capability.

In addition, for convenience of description, the embodiments of the present application independently describe a plurality of technical features, and on the premise that technical conflict does not exist, the embodiments of the present application may also be implemented in a mutually matched manner, so that in order to avoid repetition, a one-to-one description of a combination manner is omitted. The division of each part in the frame structure in the embodiment and the drawings of the application is mainly for facilitating understanding and description, and in specific application, the frame structure can be an integral structure formed by an integral molding process or a spliced structure formed by a plurality of procedures.

While the application has been described in terms of the preferred embodiment, it is not intended to limit the scope of the claims, and any person skilled in the art can make many variations and modifications without departing from the spirit and scope of the application, so that the scope of the application shall be defined by the claims.

Claims (13)

1. A photovoltaic module, comprising:

A laminate having opposed first and second surfaces;

the frame structure comprises a frame main body and a blocking part;

The frame main body comprises a bearing part positioned at the top, and the top surface of the bearing part faces the first surface;

The blocking part is positioned on the top surface of the bearing part, the blocking part is in an inverted L shape, one end of the blocking part is connected with one end of the bearing part, the other end of the blocking part is close to the laminated piece, the top surface of the blocking part is higher than the second surface, and the orthographic projection of the blocking part on the top surface of the bearing part is tangent to or separated from the orthographic projection of the laminated piece on the top surface of the bearing part.

2. The photovoltaic module according to claim 1, wherein a ratio between a space between a top surface of the barrier portion and the second surface and a thickness of the laminate is 0.02 to 0.125 in a direction perpendicular to the second surface.

3. The photovoltaic module according to claim 1 or 2, wherein a space between a top surface of the blocking portion and the second surface in a direction perpendicular to the second surface is 0.1mm to 0.5mm.

4. The photovoltaic assembly of claim 1, wherein the laminate comprises a cell structure having a creepage distance of 8mm to 12mm in a direction perpendicular to a side of the barrier toward the laminate.

5. The photovoltaic module of claim 4, wherein the blocking portion comprises a first portion and a second portion, one end of the first portion is connected to one end of the carrying portion, the other end is connected to one end of the second portion, the other end of the second portion is away from the first portion, a first glue overflow groove is formed in a side, facing the laminated piece, of the first portion, and the first glue overflow groove is recessed inward of the first portion.

6. The photovoltaic module of claim 5, wherein the second portion has a stepped structure on a surface facing the carrier portion.

7. The photovoltaic module of claim 6, wherein the step structure comprises a multi-step, in a direction perpendicular to the top surface of the second portion, the spacing between the surface of the step facing the carrier portion and the top surface of the second portion increasing progressively as the spacing of the step from the laminate decreases in a first direction perpendicular to the side of the bezel body and facing the laminate.

8. The photovoltaic assembly of claim 1, wherein the top surface of the carrier comprises a first region in contact with the laminate and a second region adjacent to the first region and not in contact with the barrier, the first region lying in a plane that is between 0 degrees and 5 degrees from the plane of the second region.

9. The photovoltaic module of claim 1, wherein the frame body further comprises a protrusion, one end of the protrusion is connected to a side of the frame body directly below the laminate, and the other end of the protrusion is away from the frame body and bent to form a second glue overflow groove with an opening facing the laminate.

10. The photovoltaic assembly of claim 9, wherein the protrusions are spaced apart from the first surface of the laminate toward the top surface of the laminate.

11. The photovoltaic module of claim 1, wherein the bezel body further comprises an extension portion having one end in contact with a side of the carrier portion directly below the laminate and the other end remote from the carrier portion in a direction perpendicular to the side of the carrier portion directly below the laminate.

12. The photovoltaic module of claim 11, wherein the extension further comprises a third glue overflow groove extending from a top surface of the extension toward an interior of the extension.

13. The photovoltaic assembly of claim 11, wherein the carrier and the extension are of an integrally formed structure.