CN221709758U - Photovoltaic module - Google Patents

Abstract

The embodiment of the present application relates to a photovoltaic module, comprising: a laminate, the laminate having a first surface and a second surface relative to each other; a frame structure, the frame structure comprising a frame body and a blocking portion; the frame body comprising a bearing portion located at the top, the top surface of the bearing portion facing the first surface; the blocking portion is located on the top surface of the bearing portion, the blocking portion is in an inverted L shape, one end of the blocking portion is connected to one end of the bearing portion, and the other end is close to the laminate, the top surface of the blocking portion is higher than the second surface, and the orthographic projection of the blocking portion on the top surface of the bearing portion is tangent to or separated from the orthographic projection of the laminate on the top surface of the bearing portion. At least it is beneficial to reduce the cost of photovoltaic modules and improve the photoelectric conversion efficiency of photovoltaic modules.

Description

Photovoltaic panels

Technical Field

The embodiments of the present application relate to the technical field of solar cells, and in particular to a photovoltaic module.

Background Art

Fossil energy causes air pollution and has limited reserves, while solar energy has the advantages of being clean, pollution-free and abundant in resources. Therefore, solar energy is gradually becoming the core clean energy to replace fossil energy. Since solar cells have good photoelectric conversion efficiency, they have become the focus of development of clean energy utilization.

In order to facilitate installation and reduce the probability of solar cells being damaged during use, current photovoltaic modules are usually composed of a laminate containing a cell structure and a photovoltaic frame surrounding the edge of the laminate. The photovoltaic frame usually includes two long-side frame components and two short-side frame components. The frame component usually consists of a frame body and a blocking portion that forms a limit groove with the frame body. However, during use, there is still a large gap between the actual photoelectric conversion efficiency of current photovoltaic modules and the expected photoelectric conversion efficiency.

Utility Model Content

The embodiment of the present application provides a photovoltaic module, which at least helps to reduce the difficulty of cleaning and maintaining the photovoltaic module and improve the photoelectric conversion efficiency of the photovoltaic module.

An embodiment of the present application provides a photovoltaic component, comprising: a laminate, the laminate having a first surface and a second surface relative to each other; a frame structure, the frame structure comprising a frame body and a blocking portion; the frame body comprising a bearing portion located at the top, the top surface of the bearing portion facing the first surface; the blocking portion is located on the top surface of the bearing portion, the blocking portion is in an inverted L-shape, one end of the blocking portion is connected to one end of the bearing portion, and the other end is close to the laminate, the top surface of the blocking portion is higher than the second surface, and the orthographic projection of the blocking portion on the top surface of the bearing portion is tangent to or separated from the orthographic projection of the laminate on the top surface of the bearing portion.

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

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

In some embodiments, the laminate includes a battery structure, and a creepage distance of the battery structure in a direction perpendicular to the barrier portion toward a side of the laminate is 8 mm to 12 mm.

In some embodiments, the blocking part includes a first part and a second part, one end of the first part is connected to one end of the bearing part, and the other end is connected to one end of the second part, the other end of the second part is away from the first part, and the first part has a first glue overflow groove facing the side of the laminate, and the first glue overflow groove is recessed into the interior of the first part.

In some embodiments, a surface of the second portion facing the carrying portion has a stepped structure.

In some embodiments, the stepped structure includes multiple steps, and along a direction perpendicular to the top surface of the second part, the spacing between the surface of the step facing the supporting part and the top surface of the second part gradually increases as the spacing between the step and the laminate along a first direction decreases, and the first direction is perpendicular to the side of the frame body and toward the laminate.

In some embodiments, the top surface of the bearing portion includes a first area in contact with the laminate, and a second area adjacent to the first area and not in contact with the blocking portion, and the angle between the plane where the first area is located and the plane where the second area is located is 0 degrees to 5 degrees.

In some embodiments, the frame body further includes a raised portion, one end of which is connected to the side surface of the frame body directly below the laminate, and the other end is away from the frame body and bent to form a second glue overflow groove opening toward the laminate.

In some embodiments, the protrusion is spaced apart from the first surface of the laminate toward the top surface of the laminate.

In some embodiments, the frame body also includes an extension portion, one end of which contacts the side of the bearing portion directly below the laminate, and the other end moves away from the bearing portion in a direction perpendicular to the side of the bearing portion directly below the laminate.

In some embodiments, the extension portion further includes a third glue overflow groove, and the third glue overflow groove extends from the top surface of the extension portion to the interior of the extension portion.

In some embodiments, the bearing portion and the extending portion are an integrally formed structure.

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

In the photovoltaic module provided by the embodiment of the present application, the laminate has a first surface and a second surface relative to each other, at least one frame structure of the photovoltaic module is composed of a frame body and a blocking portion, the top of the frame body is a bearing portion, the top surface of the bearing portion faces the first surface of the laminate, the blocking portion is in an inverted L shape, one end is connected to one end of the bearing portion and the other end is close to the laminate, and the orthographic projection of the blocking portion on the top surface of the bearing portion is tangent to or separated from the orthographic projection of the laminate on the top surface of the bearing portion. Since the orthographic projections of the laminate and the blocking portion on the top surface of the bearing portion do not overlap, it is equivalent to that the blocking portion and the bearing portion form an open limiting groove, which avoids the blocking portion from shielding the laminate from light, so that the photovoltaic module can maximize its photoelectric conversion performance; the top surface of the blocking portion is higher than the second surface of the laminate, that is, the top surface of the blocking portion is higher than the top surface of the laminate, and the side of the laminate facing the blocking portion is completely used as the surface for combining the laminate with the photovoltaic frame, which is beneficial to improving the bonding strength between the photovoltaic frame and the laminate, while reducing the exposure of the side of the laminate to the air, reducing the aging speed of the laminate, and reducing the impact of the aging of the laminate on the photoelectric conversion efficiency of the photovoltaic module.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute proportional limitations.

FIG1 is a schematic cross-sectional view of a frame structure provided by an embodiment of the present application;

FIG2 is a partial cross-sectional view of a photovoltaic module provided in one embodiment of the present application;

FIG3 is a partial cross-sectional view of another photovoltaic module provided by an embodiment of the present application;

FIG4 is a perspective view of a laminate provided in one embodiment of the present application;

FIG5 is a partial cross-sectional view of another photovoltaic module provided by an embodiment of the present application;

FIG6 is a partial cross-sectional view of another photovoltaic module provided in one embodiment of the present application;

FIG. 7 is a partial cross-sectional view of another photovoltaic module provided in an embodiment of the present application.

DETAILED DESCRIPTION

As can be seen from the background technology, the actual photoelectric conversion efficiency of current photovoltaic modules needs to be improved.

In some embodiments, refer to FIG1, which is a cross-sectional schematic diagram of a frame structure. The frame structure of the current photovoltaic module includes a frame body 101 and a blocking portion 102, and the frame body 101 and the blocking portion 102 both extend along the length direction of the frame structure. FIG1 shows a cross-sectional schematic diagram of the frame structure along the width and height directions. The frame body 101 includes a bearing portion 111 located at the top, a support portion 112 located at the bottom, and a vertical portion 113 connecting the top and the bottom, and the bearing portion 111, the support portion 112 and the vertical portion 113 surround 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 to one end of the bearing portion 111, and the other end is connected to the second portion 122, and the other end of the second portion 122 is away from the first portion 121, and the blocking portion 102 is located directly above the bearing portion 111, and a glue overflow groove 123 is provided on one side of the first portion 121 facing the second portion 122. The support portion 112 is further provided with a mounting hole 115 .

The blocking portion 102 and the bearing portion 111 form a semi-enclosed cavity for bearing the laminate. The top surface of the bearing portion 111, the side surface of the first portion 121 facing the laminate, and the bottom surface of the second portion 122 facing the bearing portion 111 can be regarded as the three side walls of the semi-enclosed cavity, which are used to place and fix the laminate. Since the semi-enclosed cavity is formed to place and fix the laminate, the sealing and reliability of the photovoltaic frame are improved. The accommodating cavity 114 in the frame body 101 facilitates the use of an angle code structure to connect two adjacent frame structures, thereby improving the convenience of photovoltaic frame installation. The mounting hole 115 is used to cooperate with the frame fixing socket to fix the frame structure of the photovoltaic module to the specified socket, thereby effectively fixing the frame structure of the photovoltaic module.

An embodiment of the present application provides a photovoltaic module, wherein a laminate has a first surface and a second surface relative to each other, and at least one frame structure of the photovoltaic module is composed of a frame body and a blocking portion, wherein the top of the frame body is a bearing portion, and the top surface of the bearing portion faces the first surface of the laminate, and the blocking portion is in an inverted L shape, with one end connected to one end of the bearing portion and the other end close to the laminate, and the orthographic projection of the blocking portion on the top surface of the bearing portion is tangent to or separated from the orthographic projection of the laminate on the top surface of the bearing portion. Since the orthographic projections of the laminate and the blocking portion on the top surface of the bearing portion do not overlap, it is equivalent to that the blocking portion and the bearing portion form an open limiting groove, thereby avoiding light shielding of the laminate by the blocking portion, so that the photovoltaic module can maximize its photoelectric conversion performance; the top surface of the blocking portion is higher than the second surface of the laminate, that is, the top surface of the blocking portion is higher than the top surface of the laminate, and the side of the laminate facing the blocking portion is completely used as the surface for combining the laminate with the photovoltaic frame, which is beneficial to improving the bonding strength between the photovoltaic frame and the laminate, while reducing the exposure of the side of the laminate to the air, reducing the aging speed of the laminate, and reducing the influence of the aging of the laminate on the photoelectric conversion efficiency of the photovoltaic module.

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can be implemented.

An embodiment of the present application provides a photovoltaic assembly. Referring to FIG2 , FIG2 is a partial cross-sectional view of a photovoltaic assembly, showing a schematic cross-sectional view of a laminate and a frame assembly on a plane formed by the width and height directions of the frame assembly.

The photovoltaic module includes: a laminate 201, the laminate 201 has a first surface 211 and a second surface 212 relative to each other; a 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 the 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 bearing portion 223, the blocking portion 222 is in an inverted L shape, one end of the blocking portion 222 is connected to one end of the bearing portion 223, and the other end is close to the laminate 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 bearing portion 223 is tangent to or separated from the orthographic projection of the laminate 201 on the top surface of the bearing portion 223.

In addition, for ease of understanding, the present embodiment of the application takes the blocking portion 222 as 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 bearing portion 223, the short side extends in a direction parallel to the top surface of the bearing portion 223, and the blocking portion 222 is located directly above the bearing portion 223 as an example for explanation. In a specific application, the blocking portion 222 may be a non-standard inverted L-shape, the extension direction of the long side of the blocking portion 222 may be any direction with an angle less than or equal to 45 degrees with the normal line of the top surface of the bearing portion 223, the extension direction of the second portion 225 may be any direction with an angle less than or equal to 30 degrees with the top surface of the bearing portion 223, and the blocking portion 222 may also be partially located directly above the bearing portion 223, that is, the orthographic projection of the blocking portion 222 on the plane where the top surface of the bearing portion 223 is located is located within the top surface of the bearing portion 223, and the present embodiment of the application does not limit the specific arrangement of the blocking portion 222.

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 to one end of the bearing part 223, and the other end is close to the laminate 201, and the positive projection of the blocking part 222 on the top surface of the bearing part 223 is tangent to or separated from the positive projection of the laminate 201 on the top surface of the bearing part 223, which is equivalent to forming an open limiting groove through the blocking part 222 and the bearing part 223, so that after the laminate 201 is placed in the limiting groove, the blocking part 222 does not have a part located directly above the laminate 201, thereby minimizing the impact of the blocking part 222 on the laminate 201. The light shielding of the laminate 201 allows the photoelectric conversion performance of the laminate 201 to be fully utilized; by setting the top surface of the blocking portion 222 higher than the second surface 212, the side of the laminate 201 facing the blocking portion 222 is completely used as the surface for combining the laminate 201 with the photovoltaic frame, which is beneficial to improving the bonding strength between the photovoltaic frame and the laminate 201, while reducing the area of the laminate 201 exposed to the air, significantly reducing the aging speed of the laminate 201, reducing the effect of parasitic light absorption caused by the aging of the laminate 201 on the photoelectric conversion efficiency of the photovoltaic module, and improving the actual photoelectric conversion efficiency of the photovoltaic module.

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 will both serve as a side wall of the limiting groove of the laminate 201, and an adhesive film with a certain fluidity is usually provided between the frame structure 202 and the laminate 201 to improve the sealing and connection reliability. In the case where there is no adhesive film on the side surface of the blocking portion 222 facing the laminate 201, the side surface of the blocking portion 222 facing the laminate 201 will directly contact the side surface of the laminate 201. In this case, the orthographic projection of the blocking portion 222 on the top surface of the bearing portion 223 is tangent to the orthographic projection of the laminate 201 on the top surface of the bearing portion 223. When there is an adhesive film on the side of the blocking portion 222 facing the laminate 201, the side of the blocking portion 222 facing the laminate 201 will indirectly contact the side of the laminate 201 through the adhesive film. In this case, the orthographic projection of the blocking portion 222 on the top surface of the supporting portion 223 is separated from the orthographic projection of the laminate 201 on the top surface of the supporting portion 223.

In addition, the specific structure of the frame body 221 can also refer to the frame body 101 mentioned above, and the embodiment of the present application will not be repeated here.

Refer to Figure 3, which is a partial cross-sectional view of another photovoltaic component. 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 supporting portion 223, and the other end is connected to the second portion 225, the other end of the second portion 225 is away from the first portion 224, and the first portion 224 has a first glue overflow groove 241 on the side facing the laminate 201, and the first glue overflow groove 241 is recessed into the first portion 224.

The blocking portion 222 may be composed of a first portion 224 for positioning the main portion of the blocking portion 222, and a second portion 225 away from the first portion 224 in a direction close to the laminate 201 and used for clamping and fixing the laminate 201. The first portion 224 and the second portion 225 may be an integrally formed structure or a spliced structure. The division of the first portion 224 and the second portion 225 here is mainly for ease of understanding.

In order to prevent the laminate 201 from being mechanically damaged or destroyed during the lamination process and to improve the sealing of the photovoltaic module, the photovoltaic frame and the laminate 201 are usually connected by a glue film that has a certain fluidity after melting, and the photovoltaic frame and the laminate 201 are indirectly in contact through the glue film that plays a bonding and buffering role. In the process of bonding the laminate 201 and the photovoltaic frame with the glue film, since the glue film has a certain fluidity, the edge of the photovoltaic frame is prone to glue overflow, thereby causing a certain degree of light shielding to the solar cells in the laminate 201.

Therefore, a first glue overflow groove 241 may be provided on a side of the first portion 224 facing the laminate 201. The first glue overflow groove 241 is provided on the surface of the first portion 224 facing the laminate 201 and is recessed from the surface of the first portion 224 to the inside of the first portion 224. After providing the adhesive film by gluing or laying the adhesive film, the melted adhesive film may 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 during the lamination process, thereby reducing the amount of adhesive film flowing along the surface of the second portion 225 to the top surface of the laminate 201 as much as possible, and avoiding light shielding on the top surface of the laminate 201 due to glue overflow.

In addition, the first glue overflow groove 241 can be recessed inward in a direction perpendicular to the first part 224 toward the side of the laminate 201, thereby having a larger glue film capacity, or it can be recessed inward in a direction close to the second part 225 to form a glue overflow groove morphology with the top surface facing inward toward the bearing part 223 as shown in Figure 3. While improving the ability of the first glue overflow groove 241 to reduce glue overflow, it is beneficial to reduce the volume of the first glue overflow groove 241, thereby improving the overall mechanical strength of the blocking part 222.

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

With reference to the above description and analysis of the blocking portion 222, for ease of understanding, the inverted L-shaped blocking portion 222 can be regarded as being composed of a first portion 224 and a second portion 225, and in a direction perpendicular to the second surface 212, the thickness of the laminate 201 refers to the average spacing h1 between the first surface 211 and the second surface 212 of the laminate 201, and the spacing between the top surface of the blocking portion 222 and the second surface 212 can be regarded as the average spacing h2 between the top surface of the second portion 225 away from the bearing portion 223 and the second surface 212.

With reference to the above analysis and description, a main function of the blocking portion 222 is to form a limiting groove of the laminate 201 together with the bearing portion 223, thereby fixing the laminate 201. At the same time, since the top surface of the blocking portion 222 is higher than the second surface 212, that is, 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 bonded together 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 sealing of the laminate 201, reducing the area of the laminate 201 exposed to the air, and thus slowing down the aging of the laminate 201.

At the same time, since the incident light on the second surface 212 of the laminate 201 is not all incident in a direction perpendicular to the second surface 212, when the angle between the incident direction of the incident light and the second surface 212 is less than 90 degrees, the blocking portion 222 whose top surface is higher than the top surface of the laminate 201 will block the incident light to a certain 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 shielding effect. In the process of dust removal on the surface of the laminate 201 by cleaning or rainwater flushing, the laminate 201 will hinder part of the water flow from being discharged along the edge of the frame structure 202, thereby causing a certain amount of dust accumulation on the edge of the laminate 201, thereby causing secondary shielding of the incident light.

Therefore, in the direction perpendicular to the second surface 212, the interval between the top surface of the blocking portion 222 and the second surface 212, that is, the ratio of the interval between the top surface of the second portion 225 away from the supporting portion 223 and the second surface 212 and the thickness of the laminate 201 can be set in the range of 0.02 to 0.125, for example, 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 laminate 201 within an appropriate range, it is ensured that the side of the laminate 201 facing the blocking portion 222 can obtain a good fixing effect and be completely sealed, thereby improving the reliability of the photovoltaic module and reducing the influence of parasitic light absorption caused by aging of the laminate 201 on the actual photoelectric conversion efficiency. The blocking portion 222 can effectively control the light shielding of the laminate 201 and the interference with the dust removal effect during the dust removal process, and the area of the dust accumulation area at the edge of the laminate 201 can be reduced as much as possible, thereby improving the average actual photoelectric conversion efficiency of the photovoltaic module during use.

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

Referring to the above description and analysis of the ratio of the interval 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, so as to ensure that the adhesive film can completely cover the side of the laminate 201 facing the barrier 222. For the sealing effect and the size of the solar cell, the thickness of the laminate 201 itself is usually in the range of 4 mm to 5 mm, for example, 4.1 mm, 4.2 mm, 4.4 mm, 4.75 mm or 4.9 mm.

Therefore, in the process of setting the blocking portion 222, the interval between the top surface of the blocking portion 222 and the second surface 212 along the second direction can be set in the 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. It is ensured that the side of the laminate 201 facing the blocking portion 222 can be completely covered by the adhesive film, the sealing property and anti-aging ability of the laminate 201 are improved, the influence of parasitic light absorption caused by aging of the laminate 201 on the actual photoelectric conversion efficiency is reduced, the light shielding of the laminate 201 by the blocking portion 222 is effectively controlled, and the average value of the actual photoelectric conversion efficiency during the use of the photovoltaic module is improved.

2 and 4 , which is a top view of a photovoltaic module. In some embodiments, the laminate 201 includes a cell structure 213 , and the cell structure 213 has a creepage distance of 8 mm to 12 mm in a direction perpendicular to the barrier 222 and toward the side of the laminate 201 .

In the direction perpendicular to the blocking portion 222 toward the side of the laminate 201, the creepage distance of the battery structure 213 refers to the average spacing w between the edge of the battery structure 213 and the edge of the adjacent 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. 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, and more incident light is not used by the battery structure 213, and the average power density and 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 shields the laminate 201 to a certain extent, the battery structure 213 may have a portion of light shielded by the blocking portion 222, thereby affecting the photoelectric conversion efficiency of the laminate 201.

Therefore, in the direction perpendicular to the blocking portion 222 toward the side of the laminate 201, the creepage distance of the battery structure 213 can be set within the range of 8mm to 12mm, for example, the creepage distance is set to 8.5mm, 9mm, 9.5mm, 10mm, 11mm or 11.5mm, etc. Thus, the light shielding of the laminate 201 caused by the dust accumulation at the edge of the laminate 201 caused by the setting of the blocking portion 222 and the light shielding of the laminate 201 by the blocking portion 222 itself are minimized and even negligible, and the actual photoelectric conversion efficiency of the battery structure 213 is improved while ensuring the combination effect of the laminate 201 and the frame structure 202.

Referring to FIG5 , FIG5 is a partial cross-sectional view of a photovoltaic module. In some embodiments, the second portion 225 has a stepped structure 250 on the surface facing the supporting portion 223 .

On the one hand, the function of the second part 225 is to fix the laminate 201. On the other hand, since the second part 225 is away from the first part 224 in the direction close to the laminate 201, the surface of the second part 225 facing the bearing part 223, the surface of the first part 224 facing the laminate 201, and the portion of the top surface of the bearing part 223 directly facing the second part 225 are equivalent to forming an overflowing glue groove. In the case where the first part 224 has a first overflowing glue groove 241 on the side facing the laminate 201, it is equivalent to the surface of the first overflowing glue groove 241, the surface of the first part 224 facing the laminate 201, the surface of the second part 225 facing the bearing part 223, and the top surface of the bearing part 223 directly facing the second part 225 forming an enlarged version of the overflowing glue groove, and the surface of the second part 225 facing the bearing part 223 can be regarded as the top surface of the overflowing glue groove.

In the case where the surface of the second portion 225 facing the bearing portion 223 is a smooth surface, it is equivalent to the top surface of the overflow glue groove being a smooth plane, and the overflow glue groove has a weak ability to restrict the flow of the adhesive film along the top surface of the overflow glue groove, and may not be able to effectively restrict the adhesive film from overflowing from the surface of the blocking portion 222 to the top surface of the laminate 201. Therefore, a step structure 250 can be provided on at least a portion of the surface of the second portion 225 facing the bearing portion 223, and the step structure 250 is used to make the surface of the second portion 225 facing the bearing portion 223 a concave-convex surface or a partially smooth surface, and the step structure 250 can serve as a blocking structure on the top surface of the overflow glue groove to restrict the movement of the adhesive film along the top surface of the overflow glue groove, thereby effectively increasing the ability of the overflow glue groove to restrict the flow of the adhesive film along the top surface of the overflow glue groove, and reducing the probability of adhesive overflow on the top surface of the laminate 201.

FIG5 is an illustration of an example in which the second portion 225 has a stepped structure on a partial surface facing the bearing portion 223 . In a specific application, the surface of the second portion 225 facing the bearing portion 223 may have a stepped structure on the front side, and the embodiment of the present application does not limit this.

In addition, as shown in Figure 5, in order to further improve the limiting ability of the glue overflow groove on glue overflow, the thickness of the second part 225 in a direction perpendicular to the top surface of the second part 225 can be set to gradually increase in the direction close to the laminate 201, so that the top surface of the glue overflow groove is in a state of being inwardly buckled toward the inside of the blocking part 222, thereby further increasing the difficulty of the glue film overflowing along the top surface of the glue overflow groove.

In some embodiments, the stepped structure 250 includes multiple steps, and along a direction perpendicular to the top surface of the second part 225, the spacing between the surface of the step toward the supporting part 223 and the top surface of the second part 225 gradually increases as the spacing between the step and the laminate 201 decreases along a first direction, and the first direction is on the side of the frame body 221 and toward the laminate 201.

The step structure 250 includes multiple steps, each step includes a step surface facing the top surface of the bearing portion 223 and a side surface facing the first portion 224. In the direction perpendicular to the top surface of the second portion 225, the interval between the surface of the step facing the bearing portion 223 and the top surface of the second portion 225 refers to the average interval h3 between the step surface and the top surface of the second portion 225. In the process of setting the step structure 250, in the direction along the second portion 225 close to the laminate 201, if the interval between the step surfaces of each step and the top surface of the second portion 225 in the direction perpendicular to the top surface of the second portion 225 decreases step by step, the step structure 250 shows a stepwise downward trend in the direction along the second portion 225 close to 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. The overflow adhesive limiting capability of the step structure 250 has great room for improvement.

Therefore, in the direction along which the second part 225 approaches the laminate 201, or in the direction perpendicular to the side of the frame body 221 and toward the laminate 201, the intervals between the step surfaces of each level and the top surface of the second part 225 along the direction perpendicular to the top surface of the second part 225 can be set to increase step by step, so that the step structure 250 has a step-by-step upward trend along the direction along which the second part 225 approaches the laminate 201, or has a step-by-step upward trend along the direction perpendicular to the side of the frame body 221 and toward the laminate 201, so that the side surfaces of each step in the step structure 250 can limit the overflow of glue, and make the surface of the second part 225 facing the bearing part 223 as inward as possible, thereby significantly improving the limiting ability of the step structure 250 on the overflow of glue, further reducing the overflow of glue on the surface of the laminate 201, and improving the aesthetics and photoelectric conversion efficiency of the photovoltaic module.

In some embodiments, the top surface of the supporting portion 223 includes a first area 231 in contact with the laminate 201, and a second area 232 adjacent to the first area 231 and not in contact with the blocking portion 222, and the angle between the plane where the first area 231 is located and the plane where the second area 232 is located is 0 degrees to 5 degrees.

Referring to the above description and analysis of the glue overflow groove formed by the second part 225, the first part 224 and the bearing part 223, the three are equivalent to forming a glue overflow groove by using their own surfaces as the side walls of the glue overflow groove in different directions, and the purpose of the glue overflow groove is to reduce the problem of light shielding on the top surface of the laminate 201 caused by glue overflow. In the top surface of the bearing part 223, the part that serves as the surface of the glue overflow groove can be regarded as the second area 232. When the plane where the first area 231 and the plane where the second area 232 are located are the same plane, the glue film on the top surface of the bearing part 223 is equivalent to flowing along a flat and smooth plane into the glue overflow groove, and the amount of glue film in the glue overflow groove is relatively easy to reach the maximum capacity and glue overflow occurs. When the plane where the first area 231 and the plane where the second area 232 are located are different planes, the angle between the plane where the second area 232 is located and the plane where the first area 231 is located can be characterized by the angle α.

Taking the plane where the first area 231 is located as a horizontal plane, if the plane where the second area 232 is located is in an upward trend in a direction perpendicular to the blocking portion 222 toward the side of the laminate 201, the overflowing glue groove has a larger glue film capacity, and the glue film on the supporting portion 223 will preferentially flow to the bottom of the overflowing glue groove located on the supporting portion 223. However, when the angle between the plane where the first area 231 is located and the plane where the second area 232 is located is too large, the flatness of the supporting portion 223 is too low, and the bent portion is prone to stress problems.

Therefore, in the process of setting the bearing portion 223, the plane where the first area 231 and the plane where the second area 232 are located can be set to different planes, the plane where the second area 232 is located is in an upward trend along the direction perpendicular to the blocking portion 222 toward the side of the laminate 201, and the angle between the plane where the first area 231 and the plane where the second area 232 are located is set in the range of 0 to 5 degrees, for example, 1 degree, 1.5 degrees, 2 degrees, 3 degrees or 4.5 degrees, etc. By setting the angle between the plane where the first area 231 and the plane where the second area 232 are located in a suitable range, the probability of glue overflow on the top surface of the laminate 201 is further reduced, while ensuring the mechanical strength of the bearing portion 223.

The embodiment of the present application is described by taking the plane where the first area 231 is located as a horizontal plane as an example. In specific applications, the plane where the first area 231 is located may be other planes having a certain angle with the horizontal plane, and the embodiment of the present application does not limit this.

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

The photovoltaic frame and the laminate 201 are in indirect contact mainly through the adhesive film with an adhesive effect, so 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 bearing portion 223 of the frame structure 202 and the height of the blocking portion 222 are usually small, thereby limiting the contact area between the frame structure 202 and the laminate 201.

Based on this, during the process of setting the frame structure 202, a protrusion 226 can also be set on the frame body 221, one end of the protrusion 226 is connected to the side of the frame body 221 located directly below the laminate 201, and the other end is away from the frame body 221 and bent to form a second glue overflow groove 261 with an opening facing the laminate 201. After the second glue overflow groove 261 is set, a certain amount of glue film can be pre-filled in the second glue overflow groove 261 by gluing or other methods. During the lamination process, the glue film between the laminate 201 and the bearing part 223 can flow into the second glue overflow groove 261, and the glue film in the second glue overflow groove 261 can overflow and contact with the first surface 211 of the laminate 201, thereby significantly increasing the area of the laminate 201 and the frame structure 202 in the photovoltaic module directly bonded by the glue film, thereby improving the bonding strength between the photovoltaic frame and the laminate 201.

At the same time, due to the provision of the second glue overflow groove 261, part of the glue film between the supporting portion 223 and the laminate 201 will flow into the second glue overflow groove 261 to fill the gap between the second glue overflow groove 261 and the laminate 201, thereby reducing the glue film capacity pressure of the glue overflow groove surrounded by the blocking portion 222 and the supporting portion 223, and further reducing the probability of glue overflow on the top surface of the laminate 201.

In some embodiments, the protrusion 226 is spaced apart from the first surface 211 of the laminate 201 toward the top surface of the laminate 201 .

With reference to the above description and analysis of the protrusion 226, the main function of the protrusion 226 is to form 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 frame structure 202 is that the glue film between the bearing portion 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 is bonded to the laminate 201.

Since the fluidity of the adhesive film is limited, the protrusion 226 can be arranged toward the top surface of the laminate 201 in a form spaced apart from the first surface 211 of the laminate 201. On the one hand, it can be easily observed whether the adhesive film in the second adhesive overflow groove 261 is in contact with the laminate 201. On the other hand, excess adhesive film in the second adhesive overflow groove 261 can be squeezed out through the gap between the protrusion 226 and the laminate 201, thereby preventing the first adhesive overflow groove 241 on the blocking portion 222 from having a large adhesive film capacity pressure, thereby reducing the probability of adhesive overflow on the top surface of the laminate 201.

In addition, since the top surface of the protrusion 226 is spaced from the first surface 211, part of the light can 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 the light shielding of the back side of the laminate 201 by the protrusion 226.

In combination with reference Figure 2 and reference Figure 7, in some embodiments, the frame body 221 also includes an extension portion 227, one end of the extension portion 227 is in contact with the side of the supporting portion 223 located directly below the laminate 201, and the other end is away from the supporting portion 223 in a direction perpendicular to the side of the supporting portion 223 located directly below the laminate 201, and the top surface of the extension portion 227 faces the first surface 211.

The photovoltaic frame and the laminate 201 are mainly in indirect contact through the adhesive film with an adhesive effect, so 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 on the back of the photovoltaic module after the photovoltaic module is installed, the incident light on the first surface 211 has little effect on the overall photoelectric conversion efficiency of the laminate 201. Therefore, the bonding strength between the photovoltaic frame and the laminate 201 can be improved by increasing the bonding area between the photovoltaic frame and the first surface 211 of the laminate 201.

In the process of setting the frame structure 202, an extension part 227 can be set on the frame body 221, one end of the extension part 227 contacts the side of the bearing part 223 located directly below the laminate 201, and the other end is away from the bearing part 223 in a direction perpendicular to the side of the bearing part 223 located directly below the laminate 201. The laminate 201 can be in contact with the top surface of the bearing part 223 facing the laminate 201 and the top surface of the extension part 227 facing the laminate 201 through the adhesive film, thereby significantly improving the contact area and bonding strength between the laminate 201 and the frame structure 202.

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

Therefore, in the direction perpendicular to the side of the frame body 221, the ratio of the width of the extension portion 227 to the width of the bearing portion 223 can 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., so as to improve the bonding strength between the frame structure 202 and the laminate 201 while ensuring the reliability of the photovoltaic module.

In some embodiments, the bearing portion 223 and the extension portion 227 are integrally formed. If the bearing portion 223 and the extension portion 227 are formed separately, an additional step of forming the extension portion 227 is required during the preparation of the frame structure 202, and the bonding firmness between the extension portion 227 and the bearing portion 223 is limited. Therefore, the bearing portion 223 and the extension portion 227 are arranged as an integrally formed structure, which reduces the preparation steps of the frame structure 202 and improves the reliability of the frame structure 202.

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

With reference 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 on the side of the blocking portion 222, a third glue overflow groove 271 extending from the top surface of the extension portion 227 to the inside of the extension portion 227 can also be provided on the side of the extension portion 227 toward the laminate 201, so that part of the excess glue film between the laminate 201 and the frame structure 202 can flow into the third glue overflow groove 271, thereby reducing the probability of glue overflow on the top surface of the laminate 201 and increasing the contact area between the glue film between the laminate 201 and the frame structure 202, thereby increasing the bonding strength between the laminate 201 and the frame structure 202.

In some embodiments, in a direction perpendicular to the side surface of the frame body 221, 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. That is, the top opening of the third glue overflow groove 271 is in an inwardly retracted state, so that the third glue overflow groove 271 has a strong glue overflow suppression capability.

In addition, for the convenience of description, the embodiments of the present application independently describe multiple technical features. Under the premise that there is no technical conflict, the embodiments of the present application can also be implemented in cooperation with each other. In order to avoid repetition, the combination methods will not be described one by one here. The division of the various parts in the frame structure in the embodiments of the present application and the drawings is mainly for the convenience of understanding and description. In specific applications, the frame structure can be an integral structure formed by an integrated molding process, or it can be a spliced structure formed by multiple processes.

Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the claims. Any technical personnel in this field may make several possible changes and modifications without departing from the concept of the present application, without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

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.